/* roulang page: index */
:root {
  --bg-primary: #0A0A12;
  --bg-secondary: #0D0D18;
  --bg-surface: #121220;
  --bg-hover: #181830;
  --primary: #8B5CF6;
  --accent: #D946EF;
  --cyan: #22D3EE;
  --success: #34D399;
  --warning: #FBBF24;
  --danger: #F87171;
  --text-main: #EDEAF9;
  --text-secondary: #9DA1C0;
  --text-dim: #656A89;
  --border-light: rgba(255, 255, 255, 0.07);
  --border-card: rgba(139, 92, 246, 0.22);
  --glow-purple: rgba(139, 92, 246, 0.35);
  --glow-pink: rgba(217, 70, 239, 0.45);
  --gradient-main: linear-gradient(135deg, #8B5CF6, #D946EF);
  --radius-card: 20px;
  --radius-element: 12px;
  --radius-image: 16px;
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.35);
  --shadow-hover: 0 12px 36px rgba(139, 92, 246, 0.18);
  --shadow-nav: 0 8px 32px rgba(0, 0, 0, 0.45);
  --font-cn: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
  --font-en: Inter, "DIN Alternate", "Barlow Condensed", system-ui;
  --container-width: 1180px;
  --section-space: 96px;
}

*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-cn);
  background-color: var(--bg-primary);
  color: var(--text-main);
  line-height: 1.6;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

body.no-scroll {
  overflow: hidden;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.25s ease-out;
}

button {
  font-family: inherit;
  border: none;
  background: none;
  cursor: pointer;
  color: inherit;
}

input, select, textarea {
  font-family: inherit;
}

.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

section {
  padding-top: var(--section-space);
  padding-bottom: var(--section-space);
}

::selection {
  background: var(--primary);
  color: #fff;
}

/* ===== 滚动条 ===== */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-primary);
}
::-webkit-scrollbar-thumb {
  background: rgba(139,92,246,0.4);
  border-radius: 99px;
}
::-webkit-scrollbar-thumb:hover {
  background: rgba(139,92,246,0.65);
}

/* ===== 隐藏 ===== */
.mobile-only {
  display: none !important;
}

/* ===== 胶囊导航 ===== */
.site-header {
  position: fixed;
  top: 14px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
  width: calc(100% - 32px);
  max-width: 1160px;
  border-radius: 999px;
  background: rgba(10,10,18,0.72);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(139,92,246,0.18);
  box-shadow: var(--shadow-nav);
  transition: background 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.site-header.scrolled {
  background: rgba(10,10,18,0.88);
  border-color: rgba(139,92,246,0.35);
  box-shadow: 0 8px 38px rgba(139,92,246,0.15);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 62px;
  padding: 0 20px 0 24px;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.logo-mark {
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background: var(--gradient-main);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-en);
  font-size: 16px;
  font-weight: 900;
  color: #fff;
  letter-spacing: -0.5px;
  box-shadow: 0 0 14px rgba(139,92,246,0.4);
}

.logo-text {
  font-size: 17px;
  font-weight: 800;
  letter-spacing: 0.5px;
  white-space: nowrap;
}

.logo-text .logo-sub {
  font-size: 13px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-left: 6px;
  letter-spacing: 1px;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 2px;
  list-style: none;
}

.nav-menu li a {
  display: inline-block;
  padding: 8px 16px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: 999px;
  position: relative;
  transition: color 0.25s, background 0.25s;
}

.nav-menu li a:hover {
  color: var(--text-main);
  background: rgba(139,92,246,0.1);
}

.nav-menu li a.active {
  color: var(--text-main);
  font-weight: 600;
}

.nav-menu li a.active::after {
  content: "";
  position: absolute;
  bottom: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 18px;
  height: 3px;
  border-radius: 99px;
  background: var(--gradient-main);
}

.nav-cta {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.btn-nav {
  padding: 8px 22px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 700;
  background: var(--gradient-main);
  color: #fff;
  transition: transform 0.25s ease-out, box-shadow 0.25s ease-out;
  box-shadow: 0 0 16px rgba(139,92,246,0.25);
}

.btn-nav:hover {
  transform: translateY(-1px);
  box-shadow: 0 0 24px rgba(217,70,239,0.4);
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 99px;
  border: 1px solid var(--border-light);
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: var(--text-main);
}

.nav-mobile-panel {
  display: none;
  position: absolute;
  top: 70px;
  left: 16px;
  right: 16px;
  background: rgba(15,15,28,0.96);
  backdrop-filter: blur(24px);
  border-radius: 20px;
  border: 1px solid rgba(139,92,246,0.2);
  padding: 18px;
  box-shadow: 0 16px 48px rgba(0,0,0,0.5);
  z-index: 999;
}

.nav-mobile-panel.open {
  display: block;
}

.nav-mobile-panel a {
  display: block;
  padding: 14px 16px;
  border-radius: 12px;
  color: var(--text-secondary);
  font-size: 15px;
  font-weight: 500;
  transition: all 0.25s;
}

.nav-mobile-panel a:hover {
  background: rgba(139,92,246,0.12);
  color: var(--text-main);
}

.nav-mobile-panel a.active {
  color: var(--text-main);
  background: rgba(139,92,246,0.08);
}

.nav-mobile-panel .btn-mobile-cta {
  text-align: center;
  margin-top: 10px;
  background: var(--gradient-main);
  color: #fff !important;
  font-weight: 700;
}

/* ===== Hero 区域 ===== */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  padding-top: 140px;
  padding-bottom: 80px;
  overflow: hidden;
  background-color: var(--bg-primary);
}

.hero-backdrop {
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-1.webp');
  background-size: cover;
  background-position: center center;
  opacity: 0.28;
  z-index: 0;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(115deg, rgba(10,10,18,0.95) 30%, rgba(10,10,18,0.62) 60%, rgba(10,10,18,0.78) 100%);
  z-index: 1;
}

.hero-grid-overlay {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(139,92,246,0.18) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(139,92,246,0.18) 1px, transparent 1px);
  background-size: 48px 48px;
  opacity: 0.2;
  z-index: 1;
}

.hero-glow {
  position: absolute;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(139,92,246,0.38) 0%, transparent 70%);
  top: 10%;
  right: -8%;
  z-index: 1;
  pointer-events: none;
}

.hero-glow-alt {
  position: absolute;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(217,70,239,0.28) 0%, transparent 70%);
  bottom: 5%;
  left: -5%;
  z-index: 1;
  pointer-events: none;
}

.hero .container {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 64px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: 999px;
  background: rgba(139,92,246,0.14);
  border: 1px solid rgba(139,92,246,0.32);
  font-size: 13px;
  font-weight: 600;
  color: #c4b5fd;
  margin-bottom: 24px;
  letter-spacing: 0.6px;
}

.hero-badge i {
  font-size: 12px;
  color: var(--cyan);
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.85); }
}

.hero h1 {
  font-size: clamp(44px, 5vw, 64px);
  font-weight: 900;
  line-height: 1.12;
  letter-spacing: 1px;
  margin-bottom: 20px;
}

.hero h1 .gradient-text {
  background: var(--gradient-main);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 17px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 32px;
  max-width: 520px;
}

.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 36px;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 15px 32px;
  height: 52px;
  border-radius: 999px;
  background: var(--gradient-main);
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 0.4px;
  box-shadow: 0 0 28px rgba(139,92,246,0.35);
  transition: all 0.25s ease-out;
  border: none;
  cursor: pointer;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 44px rgba(217,70,239,0.45);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 0 20px rgba(139,92,246,0.3);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 15px 30px;
  height: 52px;
  border-radius: 999px;
  background: transparent;
  color: #c4b5fd;
  font-size: 16px;
  font-weight: 600;
  border: 1px solid rgba(139,92,246,0.45);
  transition: all 0.25s ease-out;
  cursor: pointer;
}

.btn-secondary:hover {
  background: rgba(139,92,246,0.12);
  border-color: var(--primary);
  color: #fff;
}

.hero-trust {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

.hero-trust span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text-dim);
}

.hero-trust span i {
  color: var(--success);
  font-size: 14px;
}

/* Hero 右侧竖屏视觉组 */
.hero-visual {
  position: relative;
  height: 560px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.phone-card {
  position: absolute;
  width: 200px;
  height: 360px;
  border-radius: 24px;
  overflow: hidden;
  border: 1px solid rgba(139,92,246,0.28);
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
  background-size: cover;
  background-position: center;
}

.phone-card::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 40%, rgba(10,10,18,0.85) 100%);
}

.phone-card .phone-top {
  position: absolute;
  top: 12px;
  left: 12px;
  right: 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 2;
}

.phone-card .phone-tag {
  font-size: 10px;
  background: rgba(139,92,246,0.8);
  color: #fff;
  padding: 3px 8px;
  border-radius: 99px;
  font-weight: 600;
  letter-spacing: 0.4px;
}

.phone-card .phone-live {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 10px;
  color: #fff;
  background: rgba(0,0,0,0.5);
  padding: 3px 8px;
  border-radius: 99px;
}

.phone-card .phone-live i {
  color: var(--success);
  font-size: 8px;
}

.phone-card .phone-bottom {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 16px;
  z-index: 2;
}

.phone-card .phone-name {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 4px;
}

.phone-card .phone-desc {
  font-size: 11px;
  color: rgba(255,255,255,0.7);
  margin-bottom: 10px;
}

.phone-card .play-btn {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255,255,255,0.18);
  backdrop-filter: blur(8px);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 14px;
  transition: all 0.25s;
}

.phone-card .play-btn:hover {
  background: var(--gradient-main);
}

.phone-card-1 {
  transform: translateX(-82px) translateY(-30px) rotate(-4deg);
  background-image: url('/assets/images/coverpic/cover-3.webp');
  animation: float-phone 6s ease-in-out infinite;
  z-index: 1;
  opacity: 0.85;
}

.phone-card-2 {
  transform: translateX(0) translateY(10px);
  background-image: url('/assets/images/coverpic/cover-5.webp');
  animation: float-phone 7s ease-in-out 0.8s infinite;
  z-index: 3;
  border-color: rgba(217,70,239,0.3);
  box-shadow: 0 20px 60px rgba(217,70,239,0.2);
}

.phone-card-3 {
  transform: translateX(84px) translateY(-18px) rotate(4deg);
  background-image: url('/assets/images/coverpic/cover-2.webp');
  animation: float-phone 8s ease-in-out 1.6s infinite;
  z-index: 2;
  opacity: 0.9;
}

@keyframes float-phone {
  0%, 100% { margin-top: 0; }
  50% { margin-top: -14px; }
}

/* ===== 数据条 ===== */
.stats-bar {
  background: var(--bg-secondary);
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
  padding: 40px 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.stat-item {
  text-align: center;
  padding: 20px 16px;
  border-radius: var(--radius-card);
  background: rgba(255,255,255,0.02);
  border: 1px solid var(--border-light);
  transition: all 0.3s ease-out;
}

.stat-item:hover {
  border-color: var(--border-card);
  transform: translateY(-4px);
  box-shadow: 0 10px 28px rgba(139,92,246,0.12);
}

.stat-item .stat-number {
  font-family: var(--font-en);
  font-size: 42px;
  font-weight: 800;
  background: var(--gradient-main);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
  letter-spacing: -0.5px;
}

.stat-item .stat-label-item {
  margin-top: 10px;
  font-size: 14px;
  color: var(--text-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
}

.stat-item .stat-label-item i {
  color: var(--primary);
  font-size: 13px;
}

/* ===== 区块公共标题 ===== */
.section-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 32px;
  margin-bottom: 48px;
}

.section-heading h2 {
  font-size: 34px;
  font-weight: 800;
  line-height: 1.25;
  letter-spacing: 0.5px;
}

.section-heading h2 .gradient-text {
  background: var(--gradient-main);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.section-heading p {
  font-size: 15px;
  color: var(--text-secondary);
  margin-top: 8px;
  max-width: 540px;
  line-height: 1.7;
}

.heading-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
  white-space: nowrap;
  flex-shrink: 0;
  transition: all 0.25s;
}

.heading-link i {
  transition: transform 0.25s;
}

.heading-link:hover i {
  transform: translateX(4px);
}

.heading-link:hover {
  color: var(--primary);
}

/* ===== 爆款片段卡 ===== */
.hot-section {
  background: var(--bg-primary);
}

.hot-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.hot-card {
  border-radius: var(--radius-card);
  background: var(--bg-surface);
  border: 1px solid var(--border-light);
  overflow: hidden;
  transition: all 0.3s ease-out;
  cursor: pointer;
}

.hot-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-card);
  box-shadow: var(--shadow-hover);
}

.hot-card-media {
  position: relative;
  aspect-ratio: 4/3.4;
  overflow: hidden;
}

.hot-card-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.35s ease-out;
}

.hot-card:hover .hot-card-media img {
  transform: scale(1.03);
}

.hot-card-media::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 55%, rgba(10,10,18,0.7) 100%);
}

.hot-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 2;
  font-size: 11px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 99px;
  letter-spacing: 0.5px;
}

.hot-badge.hot {
  background: linear-gradient(135deg, #FBBF24, #F87171);
  color: #fff;
}

.hot-badge.new {
  background: linear-gradient(135deg, #34D399, #22D3EE);
  color: #0A0A12;
}

.hot-badge.top {
  background: linear-gradient(135deg, #8B5CF6, #D946EF);
  color: #fff;
}

.hot-play {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(255,255,255,0.2);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 16px;
  z-index: 2;
  transition: all 0.25s;
}

.hot-card:hover .hot-play {
  background: var(--gradient-main);
  border-color: transparent;
  box-shadow: 0 0 20px rgba(217,70,239,0.5);
}

.hot-meta-info {
  position: absolute;
  bottom: 12px;
  left: 12px;
  right: 12px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  z-index: 2;
  font-size: 12px;
  color: rgba(255,255,255,0.9);
}

.hot-meta-info span {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.hot-card-body {
  padding: 18px 20px 20px;
}

.hot-card-body h3 {
  font-size: 19px;
  font-weight: 700;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 6px;
}

.hot-card-tags {
  display: flex;
  gap: 8px;
  margin-bottom: 12px;
  flex-wrap: wrap;
}

.tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  padding: 3px 12px;
  border-radius: 99px;
  background: rgba(139,92,246,0.12);
  color: #c4b5fd;
  border: 1px solid rgba(139,92,246,0.15);
}

.tag.tag-cyan {
  background: rgba(34,211,238,0.1);
  color: var(--cyan);
  border-color: rgba(34,211,238,0.18);
}

.tag.tag-pink {
  background: rgba(217,70,239,0.1);
  color: #f0abfc;
  border-color: rgba(217,70,239,0.18);
}

.hot-card-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  transition: all 0.25s;
}

.hot-card-link i {
  transition: transform 0.25s;
  font-size: 12px;
}

.hot-card:hover .hot-card-link i {
  transform: translateX(4px);
}

/* ===== 种草清单 ===== */
.recommend-section {
  background: var(--bg-secondary);
  position: relative;
  overflow: hidden;
}

.recommend-section::before {
  content: "";
  position: absolute;
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(139,92,246,0.14) 0%, transparent 70%);
  right: -5%;
  top: 15%;
  pointer-events: none;
}

.recommend-layout {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 64px;
}

.recommend-intro {
  position: sticky;
  top: 100px;
  align-self: start;
  padding-top: 20px;
}

.recommend-intro h2 {
  font-size: 34px;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 16px;
}

.recommend-intro h2 .gradient-text {
  background: var(--gradient-main);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.recommend-intro p {
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 20px;
  font-size: 15px;
}

.recommend-line {
  width: 48px;
  height: 4px;
  border-radius: 99px;
  background: var(--gradient-main);
  margin-bottom: 20px;
}

.recommend-list {
  display: flex;
  flex-direction: column;
}

.recommend-item {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 22px 16px;
  border-bottom: 1px solid var(--border-light);
  border-radius: 16px;
  transition: all 0.3s ease-out;
  cursor: pointer;
  background: transparent;
}

.recommend-item:first-child {
  border-top: 1px solid var(--border-light);
}

.recommend-item:hover {
  background: rgba(139,92,246,0.06);
  transform: translateX(8px);
}

.recommend-num {
  font-family: var(--font-en);
  font-size: 28px;
  font-weight: 800;
  color: var(--text-dim);
  width: 48px;
  text-align: center;
  transition: color 0.3s;
  flex-shrink: 0;
}

.recommend-item:hover .recommend-num {
  background: var(--gradient-main);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.recommend-thumb {
  width: 88px;
  height: 88px;
  border-radius: 16px;
  object-fit: cover;
  flex-shrink: 0;
  border: 1px solid var(--border-light);
}

.recommend-content {
  flex: 1;
  min-width: 0;
}

.recommend-content h3 {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.recommend-content p {
  font-size: 13px;
  color: var(--text-secondary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.recommend-arrow {
  color: var(--text-dim);
  font-size: 14px;
  flex-shrink: 0;
  transition: all 0.25s;
}

.recommend-item:hover .recommend-arrow {
  color: var(--primary);
  transform: translateX(4px);
}

/* ===== 评论口碑条 ===== */
.review-section {
  background: var(--bg-primary);
  overflow: hidden;
}

.review-track-wrapper {
  margin: 0 calc((100vw - var(--container-width)) / -2);
  overflow: hidden;
  padding: 8px 0;
}

.review-track {
  display: flex;
  gap: 20px;
  animation: scroll-left 30s linear infinite;
  width: max-content;
  padding: 0 calc((100vw - var(--container-width)) / 2);
}

.review-track-wrapper:hover .review-track {
  animation-play-state: paused;
}

@keyframes scroll-left {
  0% { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

.review-card {
  width: 340px;
  flex-shrink: 0;
  border-radius: 20px;
  background: var(--bg-surface);
  border: 1px solid rgba(139,92,246,0.18);
  padding: 24px;
  transition: all 0.3s;
}

.review-card:hover {
  border-color: rgba(139,92,246,0.4);
  box-shadow: 0 8px 28px rgba(139,92,246,0.12);
}

.review-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.review-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}

.review-name {
  font-size: 14px;
  font-weight: 600;
}

.review-source {
  font-size: 12px;
  color: var(--text-dim);
}

.review-stars {
  color: var(--warning);
  font-size: 13px;
  margin-bottom: 8px;
  letter-spacing: 1px;
}

.review-text {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===== 最新资讯 CMS ===== */
.news-section {
  background: var(--bg-secondary);
}

.news-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.news-card {
  display: flex;
  align-items: center;
  gap: 20px;
  background: var(--bg-surface);
  border-radius: 16px;
  border: 1px solid var(--border-light);
  padding: 16px 20px;
  transition: all 0.3s ease-out;
  cursor: pointer;
}

.news-card:hover {
  border-color: var(--border-card);
  background: var(--bg-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(139,92,246,0.1);
}

.news-thumb {
  width: 96px;
  height: 72px;
  border-radius: 12px;
  object-fit: cover;
  flex-shrink: 0;
  background-color: var(--bg-hover);
}

.news-content {
  flex: 1;
  min-width: 0;
}

.news-content .news-category {
  font-size: 12px;
  font-weight: 600;
  color: var(--primary);
  background: rgba(139,92,246,0.1);
  padding: 2px 10px;
  border-radius: 99px;
  display: inline-block;
  margin-bottom: 6px;
}

.news-content h3 {
  font-size: 17px;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 4px;
}

.news-content p {
  font-size: 13px;
  color: var(--text-dim);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.news-meta {
  font-size: 12px;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.news-meta i {
  margin-right: 2px;
}

.news-arrow {
  margin-left: 12px;
  color: var(--text-dim);
  font-size: 14px;
  flex-shrink: 0;
  transition: all 0.25s;
}

.news-card:hover .news-arrow {
  color: var(--primary);
  transform: translateX(4px);
}

.news-empty {
  background: var(--bg-surface);
  border-radius: 16px;
  border: 1px dashed rgba(139,92,246,0.3);
  padding: 48px 24px;
  text-align: center;
  color: var(--text-dim);
}

.news-empty i {
  font-size: 28px;
  margin-bottom: 12px;
  display: block;
  color: var(--primary);
  opacity: 0.5;
}

.news-empty p {
  font-size: 14px;
}

/* ===== FAQ 区块 ===== */
.faq-section {
  background: var(--bg-primary);
}

.faq-layout {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 64px;
  align-items: start;
}

.faq-intro {
  position: sticky;
  top: 100px;
}

.faq-intro h2 {
  font-size: 34px;
  font-weight: 800;
  margin-bottom: 16px;
  line-height: 1.3;
}

.faq-intro h2 .gradient-text {
  background: var(--gradient-main);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.faq-intro p {
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 20px;
  font-size: 15px;
}

.faq-contact {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 15px;
  font-weight: 600;
  color: var(--primary);
  transition: all 0.25s;
}

.faq-contact:hover {
  color: var(--accent);
  gap: 12px;
}

.accordion-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.accordion-item {
  border: 1px solid var(--border-light);
  border-radius: 16px;
  background: var(--bg-surface);
  overflow: hidden;
  transition: border-color 0.3s;
}

.accordion-item.active {
  border-color: rgba(139,92,246,0.4);
  box-shadow: 0 4px 18px rgba(139,92,246,0.12);
}

.accordion-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 22px;
  cursor: pointer;
}

.accordion-header h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-main);
}

.accordion-icon {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  border: 1px solid rgba(139,92,246,0.25);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  font-size: 13px;
  flex-shrink: 0;
  transition: transform 0.3s ease-out, background 0.3s, color 0.3s;
}

.accordion-item.active .accordion-icon {
  transform: rotate(45deg);
  background: var(--primary);
  color: #fff;
  border-color: transparent;
}

.accordion-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease-out;
}

.accordion-body-inner {
  padding: 0 22px 20px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
  border-top: 1px solid var(--border-light);
  padding-top: 14px;
  margin-top: 0;
}

/* ===== CTA 区域 ===== */
.cta-section {
  background: var(--bg-secondary);
  position: relative;
  overflow: hidden;
}

.cta-glow-bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 50% 50%, rgba(139,92,246,0.28) 0%, transparent 65%),
              radial-gradient(ellipse at 30% 40%, rgba(217,70,239,0.18) 0%, transparent 60%);
  pointer-events: none;
}

.cta-inner {
  position: relative;
  text-align: center;
  padding: 40px 0;
  max-width: 720px;
  margin: 0 auto;
}

.cta-inner h2 {
  font-size: clamp(30px, 3.5vw, 44px);
  font-weight: 900;
  line-height: 1.25;
  margin-bottom: 16px;
}

.cta-inner h2 .gradient-text {
  background: var(--gradient-main);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.cta-inner p {
  font-size: 16px;
  color: var(--text-secondary);
  margin-bottom: 32px;
  line-height: 1.8;
}

.cta-btn-group {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.cta-tip {
  margin-top: 20px;
  font-size: 13px;
  color: var(--text-dim);
}

/* ===== 页脚 ===== */
.site-footer {
  background: #08080E;
  border-top: 1px solid var(--border-light);
  padding-top: 64px;
  padding-bottom: 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand .logo-text {
  font-size: 20px;
}

.footer-brand-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-top: 14px;
  max-width: 320px;
}

.footer-col-title {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 18px;
  letter-spacing: 0.4px;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 10px;
}

.footer-links li a {
  font-size: 14px;
  color: var(--text-secondary);
  transition: all 0.25s;
}

.footer-links li a:hover {
  color: var(--primary);
  padding-left: 4px;
}

.footer-contact-info p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 8px;
}

.footer-contact-info p i {
  width: 20px;
  color: var(--primary);
  margin-right: 4px;
}

.footer-bottom {
  border-top: 1px solid var(--border-light);
  padding-top: 28px;
  font-size: 13px;
  color: var(--text-dim);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-bottom a {
  color: var(--text-dim);
}

.footer-bottom a:hover {
  color: var(--primary);
}

/* ===== 移动端悬浮按钮 ===== */
.mobile-dock {
  display: none;
}

/* ===== 动画 ===== */
.reveal {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .phone-card-1, .phone-card-2, .phone-card-3 {
    animation: none;
  }
  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* ===== 响应式断点 ===== */
@media (max-width: 1024px) {
  :root {
    --section-space: 72px;
  }

  .hero .container {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .hero-visual {
    height: 420px;
  }

  .phone-card-1 {
    transform: translateX(-62px) translateY(-20px) rotate(-3deg);
  }

  .phone-card-3 {
    transform: translateX(64px) translateY(-12px) rotate(3deg);
  }

  .hot-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .recommend-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .recommend-intro {
    position: static;
  }

  .faq-layout {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .faq-intro {
    position: static;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 768px) {
  .nav-menu {
    display: none;
  }

  .nav-cta .btn-nav {
    display: none;
  }

  .nav-toggle {
    display: inline-flex;
  }

  .mobile-only {
    display: flex !important;
  }

  .section-heading {
    flex-direction: column;
    align-items: flex-start;
    gap: 12px;
  }

  .hero {
    padding-top: 110px;
  }

  .hero h1 {
    font-size: 36px;
  }

  .hero-subtitle {
    font-size: 15px;
  }

  .hero-buttons {
    flex-direction: column;
  }

  .btn-primary, .btn-secondary {
    width: 100%;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }

  .stat-item .stat-number {
    font-size: 32px;
  }

  .hot-grid {
    grid-template-columns: 1fr;
  }

  .review-track-wrapper {
    margin: 0 -24px;
  }

  .review-track {
    padding: 0 24px;
  }

  .news-card {
    flex-wrap: wrap;
  }

  .news-thumb {
    width: 100%;
    height: 140px;
  }

  .news-arrow {
    display: none;
  }

  .cta-btn-group {
    flex-direction: column;
    width: 100%;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }

  .footer-bottom {
    flex-direction: column;
    justify-content: center;
    text-align: center;
  }

  .mobile-dock {
    display: flex;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(10,10,18,0.92);
    backdrop-filter: blur(20px);
    border-top: 1px solid rgba(139,92,246,0.18);
    padding: 12px 16px;
    z-index: 900;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
  }

  .mobile-dock .dock-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: 999px;
    background: var(--gradient-main);
    color: #fff;
    font-size: 15px;
    font-weight: 700;
    box-shadow: 0 0 20px rgba(139,92,246,0.35);
    flex: 1;
  }

  .mobile-dock .dock-back {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    border: 1px solid var(--border-light);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    flex-shrink: 0;
  }

  body {
    padding-bottom: 0;
  }

  section {
    padding-top: 64px;
    padding-bottom: 64px;
  }
}

@media (max-width: 520px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }

  .hero-visual {
    height: 340px;
  }

  .phone-card {
    width: 160px;
    height: 290px;
  }

  .phone-card-1 {
    transform: translateX(-52px) translateY(-12px) rotate(-3deg);
  }

  .phone-card-3 {
    transform: translateX(52px) translateY(-8px) rotate(3deg);
  }

  .section-heading h2 {
    font-size: 26px;
  }

  .stats-grid {
    grid-template-columns: 1fr 1fr;
  }

  .recommend-thumb {
    width: 70px;
    height: 70px;
  }

  .recommend-content p {
    font-size: 12px;
  }

  .review-card {
    width: 280px;
  }

  .cta-inner h2 {
    font-size: 28px;
  }

  .btn-primary, .btn-secondary {
    font-size: 15px;
    padding: 13px 22px;
  }
}

/* roulang page: category1 */
:root {
    --bg-primary: #0A0A12;
    --bg-secondary: #0D0D18;
    --bg-surface: #121220;
    --bg-hover: #181830;
    --primary: #8B5CF6;
    --secondary: #D946EF;
    --accent: #22D3EE;
    --success: #34D399;
    --warning: #FBBF24;
    --error: #F87171;
    --text-main: #EDEAF9;
    --text-secondary: #9DA1C0;
    --text-dim: #656A89;
    --text-disabled: #454968;
    --border: rgba(255,255,255,0.07);
    --border-primary: rgba(139,92,246,0.22);
    --border-primary-hover: rgba(139,92,246,0.35);
    --radius-card: 20px;
    --radius-element: 12px;
    --radius-img: 16px;
    --shadow-card: 0 4px 24px rgba(0,0,0,0.35);
    --shadow-hover: 0 12px 36px rgba(139,92,246,0.18);
    --shadow-btn: 0 0 28px rgba(139,92,246,0.35);
    --shadow-btn-hover: 0 0 44px rgba(217,70,239,0.45);
    --gradient-primary: linear-gradient(135deg, #8B5CF6, #D946EF);
    --font-cn: 'PingFang SC','Microsoft YaHei','Noto Sans SC',system-ui,sans-serif;
    --font-num: 'Inter','DIN Alternate','Barlow Condensed',system-ui;
    --container-max: 1180px;
    --section-padding: 96px;
    --card-gap: 24px;
    --transition-fast: 0.25s ease-out;
  }

  *,
  *::before,
  *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }

  html {
    scroll-behavior: smooth;
    scroll-padding-top: 100px;
  }

  body {
    font-family: var(--font-cn);
    font-size: 16px;
    line-height: 1.8;
    background: var(--bg-primary);
    color: var(--text-main);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
  }

  body.nav-open {
    overflow: hidden;
  }

  img {
    max-width: 100%;
    display: block;
    object-fit: cover;
  }

  a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast), border-color var(--transition-fast), background var(--transition-fast), box-shadow var(--transition-fast), transform var(--transition-fast), opacity var(--transition-fast);
  }

  button {
    font-family: inherit;
    border: none;
    background: none;
    cursor: pointer;
    color: inherit;
  }

  input,
  textarea {
    font-family: inherit;
    font-size: 14px;
    color: var(--text-main);
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--border);
    border-radius: var(--radius-element);
    padding: 12px 16px;
    outline: none;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
  }

  input:focus,
  textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(139,92,246,0.15);
    background: rgba(139,92,246,0.04);
  }

  input::placeholder,
  textarea::placeholder {
    color: var(--text-dim);
  }

  ul,
  ol {
    list-style: none;
  }

  .container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding-left: 20px;
    padding-right: 20px;
  }

  .section {
    padding: var(--section-padding) 0;
    position: relative;
  }

  .section-head {
    text-align: center;
    max-width: 640px;
    margin: 0 auto 48px;
  }

  .section-tag {
    display: inline-block;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--primary);
    background: rgba(139,92,246,0.1);
    border: 1px solid var(--border-primary);
    border-radius: 999px;
    padding: 6px 16px;
    margin-bottom: 14px;
  }

  .section-head h2 {
    font-size: 34px;
    font-weight: 800;
    line-height: 1.25;
    margin-bottom: 12px;
    color: var(--text-main);
  }

  .section-head p {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.7;
  }

  .gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    color: transparent;
  }

  .btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    height: 52px;
    padding: 0 34px;
    border-radius: 999px;
    background: var(--gradient-primary);
    color: #fff;
    font-size: 15px;
    font-weight: 700;
    box-shadow: var(--shadow-btn);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), opacity var(--transition-fast);
    white-space: nowrap;
  }

  .btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-btn-hover);
    color: #fff;
  }

  .btn-primary:active {
    transform: translateY(-1px);
    box-shadow: 0 0 20px rgba(139,92,246,0.25);
  }

  .btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    height: 52px;
    padding: 0 34px;
    border-radius: 999px;
    background: transparent;
    border: 1px solid rgba(139,92,246,0.45);
    color: var(--primary);
    font-size: 15px;
    font-weight: 600;
    transition: background var(--transition-fast), transform var(--transition-fast), border-color var(--transition-fast);
    white-space: nowrap;
  }

  .btn-secondary:hover {
    background: rgba(139,92,246,0.12);
    border-color: var(--primary);
    transform: translateY(-2px);
    color: var(--primary);
  }

  .btn-secondary:active {
    transform: translateY(0);
  }

  .btn-lg {
    height: 60px;
    padding: 0 52px;
    font-size: 17px;
  }

  .text-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--primary);
    font-size: 14px;
    font-weight: 600;
    transition: gap var(--transition-fast), color var(--transition-fast);
  }

  .text-link:hover {
    gap: 14px;
    color: var(--secondary);
  }

  .text-link i {
    font-size: 12px;
  }

  /* ========== 导航 ========== */
  .site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 20px;
    display: flex;
    justify-content: center;
    pointer-events: none;
  }

  .site-header.scrolled {
    padding: 10px 20px;
  }

  .site-header .nav-container {
    pointer-events: auto;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 20px;
    max-width: 1180px;
    width: 100%;
    padding: 10px 16px 10px 20px;
    background: rgba(10,10,18,0.72);
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: 999px;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: 0 8px 32px rgba(0,0,0,0.45);
    transition: background var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast), padding var(--transition-fast);
  }

  .site-header.scrolled .nav-container {
    background: rgba(10,10,18,0.86);
    border-color: rgba(139,92,246,0.2);
    box-shadow: 0 12px 40px rgba(0,0,0,0.55);
  }

  .nav-logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
  }

  .logo-mark {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 12px;
    background: var(--gradient-primary);
    font-family: var(--font-num);
    font-size: 15px;
    font-weight: 900;
    color: #fff;
    letter-spacing: -1px;
    box-shadow: 0 0 20px rgba(139,92,246,0.35);
  }

  .logo-text {
    font-size: 19px;
    font-weight: 800;
    color: var(--text-main);
    line-height: 1.2;
    letter-spacing: 0.5px;
  }

  .logo-sub {
    display: block;
    font-size: 10px;
    font-weight: 600;
    color: var(--text-dim);
    letter-spacing: 2px;
    text-transform: uppercase;
  }

  .nav-menu ul {
    display: flex;
    align-items: center;
    gap: 4px;
    margin: 0;
    padding: 0;
  }

  .nav-menu a {
    display: inline-block;
    padding: 10px 18px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: 999px;
    position: relative;
    transition: color var(--transition-fast), background var(--transition-fast);
  }

  .nav-menu a:hover {
    color: var(--text-main);
    background: rgba(139,92,246,0.08);
  }

  .nav-menu a.active {
    color: var(--primary);
    font-weight: 700;
    background: rgba(139,92,246,0.1);
  }

  .nav-menu a.active::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--primary);
    box-shadow: 0 0 8px var(--primary);
  }

  .nav-cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 42px;
    padding: 0 22px;
    border-radius: 999px;
    background: var(--gradient-primary);
    color: #fff;
    font-size: 13px;
    font-weight: 700;
    box-shadow: 0 0 18px rgba(139,92,246,0.3);
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
    white-space: nowrap;
    flex-shrink: 0;
  }

  .nav-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(217,70,239,0.4);
    color: #fff;
  }

  .nav-toggle {
    display: none;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: rgba(139,92,246,0.12);
    border: 1px solid var(--border-primary);
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 5px;
    flex-shrink: 0;
  }

  .nav-toggle span {
    display: block;
    width: 18px;
    height: 2px;
    background: var(--text-main);
    border-radius: 2px;
    transition: transform var(--transition-fast), opacity var(--transition-fast), background var(--transition-fast);
  }

  .nav-toggle.open span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .nav-toggle.open span:nth-child(2) {
    opacity: 0;
  }

  .nav-toggle.open span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  /* ========== Hero ========== */
  .page-hero {
    position: relative;
    padding: 180px 0 100px;
    overflow: hidden;
    background: linear-gradient(135deg, rgba(10,10,18,0.92), rgba(13,13,24,0.75)), url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
  }

  .page-hero::before {
    content: '';
    position: absolute;
    top: -120px;
    right: -120px;
    width: 480px;
    height: 480px;
    background: radial-gradient(circle, rgba(139,92,246,0.15), transparent 70%);
    pointer-events: none;
  }

  .page-hero::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 100px;
    background: linear-gradient(to bottom, transparent, var(--bg-primary));
    pointer-events: none;
  }

  .page-hero-inner {
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 2;
  }

  .page-hero-content {
    display: flex;
    flex-direction: column;
    gap: 20px;
    align-items: flex-start;
  }

  .breadcrumb {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--text-dim);
    background: rgba(255,255,255,0.03);
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 6px 16px;
  }

  .breadcrumb a {
    color: var(--primary);
  }

  .breadcrumb a:hover {
    color: var(--secondary);
  }

  .breadcrumb i {
    font-size: 10px;
    color: var(--text-dim);
  }

  .page-hero h1 {
    font-size: clamp(32px, 4.5vw, 52px);
    font-weight: 900;
    line-height: 1.15;
    margin: 0;
  }

  .page-hero h1 .gradient-text {
    display: inline-block;
  }

  .page-hero-desc {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-secondary);
    max-width: 520px;
    margin: 0;
  }

  .page-hero-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-top: 8px;
  }

  .hero-trust {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin-top: 12px;
  }

  .hero-trust span {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    color: var(--text-dim);
  }

  .hero-trust i {
    color: var(--accent);
    font-size: 12px;
  }

  .page-hero-visual {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
  }

  .page-hero-visual img {
    width: 100%;
    max-width: 420px;
    height: auto;
    aspect-ratio: 3 / 4;
    object-fit: cover;
    border-radius: 28px;
    border: 1px solid rgba(139,92,246,0.25);
    box-shadow: 0 20px 60px rgba(139,92,246,0.15);
    transform: rotate(2deg);
    transition: transform var(--transition-fast);
  }

  .page-hero-visual:hover img {
    transform: rotate(0deg) scale(1.02);
  }

  .visual-badge {
    position: absolute;
    top: 18%;
    left: -10px;
    background: var(--gradient-primary);
    color: #fff;
    font-size: 12px;
    font-weight: 700;
    border-radius: 999px;
    padding: 8px 18px;
    box-shadow: 0 8px 24px rgba(139,92,246,0.35);
    animation: float 4s ease-in-out infinite;
  }

  .visual-info {
    position: absolute;
    bottom: 14%;
    right: -8px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: rgba(10,10,18,0.8);
    backdrop-filter: blur(12px);
    border-radius: 999px;
    padding: 10px 18px;
    font-size: 13px;
    color: var(--text-main);
    border: 1px solid var(--border-primary);
    box-shadow: var(--shadow-card);
    animation: float 4s ease-in-out infinite;
    animation-delay: 1.2s;
  }

  .visual-info i {
    color: var(--success);
  }

  @keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
  }

  /* ========== 步骤条 ========== */
  .steps-section {
    background: var(--bg-secondary);
  }

  .steps-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--card-gap);
  }

  .step-card {
    position: relative;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-card);
    padding: 40px 32px 36px;
    transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
    overflow: hidden;
  }

  .step-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: opacity var(--transition-fast);
  }

  .step-card:hover {
    transform: translateY(-6px);
    border-color: var(--border-primary-hover);
    box-shadow: var(--shadow-hover);
  }

  .step-card:hover::before {
    opacity: 1;
  }

  .step-num {
    position: absolute;
    top: 24px;
    right: 28px;
    font-family: var(--font-num);
    font-size: 42px;
    font-weight: 800;
    color: rgba(255,255,255,0.05);
    line-height: 1;
  }

  .step-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 60px;
    height: 60px;
    border-radius: 16px;
    background: rgba(139,92,246,0.12);
    border: 1px solid var(--border-primary);
    color: var(--primary);
    font-size: 22px;
    margin-bottom: 20px;
    transition: background var(--transition-fast), transform var(--transition-fast);
  }

  .step-card:hover .step-icon {
    background: var(--gradient-primary);
    color: #fff;
    transform: scale(1.05);
  }

  .step-card h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 10px;
  }

  .step-card p {
    font-size: 14px;
    line-height: 1.7;
    color: var(--text-secondary);
    margin: 0;
  }

  /* ========== 玩法推荐卡墙 ========== */
  .guide-section {
    background: var(--bg-primary);
  }

  .guide-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--card-gap);
  }

  .guide-card {
    display: flex;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-card);
    overflow: hidden;
    transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
  }

  .guide-card:hover {
    transform: translateY(-6px);
    border-color: var(--border-primary-hover);
    box-shadow: var(--shadow-hover);
  }

  .guide-card-cover {
    position: relative;
    flex: 0 0 42%;
    min-height: 220px;
    overflow: hidden;
  }

  .guide-card-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
  }

  .guide-card:hover .guide-card-cover img {
    transform: scale(1.05);
  }

  .guide-card-cover::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to right, transparent 60%, rgba(18,18,32,0.3));
  }

  .guide-card-badge {
    position: absolute;
    top: 14px;
    left: 14px;
    background: rgba(10,10,18,0.76);
    backdrop-filter: blur(8px);
    border-radius: 999px;
    padding: 5px 14px;
    font-size: 11px;
    font-weight: 600;
    color: var(--accent);
    border: 1px solid rgba(34,211,238,0.25);
    z-index: 2;
  }

  .guide-card-body {
    flex: 1;
    padding: 26px 28px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    justify-content: center;
  }

  .guide-card-body h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-main);
    line-height: 1.3;
  }

  .guide-card-body p {
    font-size: 14px;
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
  }

  .guide-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
  }

  .guide-tag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    background: rgba(139,92,246,0.08);
    border: 1px solid var(--border-primary);
    border-radius: 999px;
    padding: 4px 12px;
    font-size: 12px;
    color: var(--primary);
    font-weight: 500;
  }

  .guide-card-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    color: var(--primary);
    font-size: 14px;
    font-weight: 600;
    margin-top: 4px;
    transition: gap var(--transition-fast), color var(--transition-fast);
  }

  .guide-card-link:hover {
    gap: 12px;
    color: var(--secondary);
  }

  .guide-card-link i {
    font-size: 12px;
  }

  /* ========== 数据条 ========== */
  .data-section {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
    padding: 60px 0;
  }

  .data-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
  }

  .data-item {
    text-align: center;
    padding: 12px 20px;
  }

  .data-item-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    margin: 0 auto 12px;
    border-radius: 14px;
    background: rgba(139,92,246,0.1);
    border: 1px solid var(--border-primary);
    color: var(--primary);
    font-size: 18px;
  }

  .data-num {
    font-family: var(--font-num);
    font-size: 40px;
    font-weight: 800;
    line-height: 1.2;
    color: var(--text-main);
    letter-spacing: -1px;
  }

  .data-num span {
    color: var(--primary);
  }

  .data-label {
    font-size: 13px;
    color: var(--text-dim);
    margin-top: 6px;
  }

  /* ========== FAQ ========== */
  .faq-section {
    background: var(--bg-primary);
  }

  .faq-layout {
    display: grid;
    grid-template-columns: 0.9fr 1.5fr;
    gap: 60px;
  }

  .faq-sidebar {
    position: sticky;
    top: 120px;
    align-self: start;
    display: flex;
    flex-direction: column;
    gap: 18px;
    align-items: flex-start;
  }

  .faq-sidebar h2 {
    font-size: 34px;
    font-weight: 800;
    line-height: 1.25;
    color: var(--text-main);
  }

  .faq-sidebar p {
    font-size: 15px;
    color: var(--text-secondary);
    line-height: 1.7;
  }

  .faq-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
  }

  .faq-item {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    overflow: hidden;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  }

  .faq-item:hover {
    border-color: var(--border-primary-hover);
  }

  .faq-item.active {
    border-color: var(--border-primary-hover);
    box-shadow: 0 0 20px rgba(139,92,246,0.1);
  }

  .faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 22px 26px;
    text-align: left;
    font-size: 16px;
    font-weight: 600;
    color: var(--text-main);
    background: transparent;
    border: none;
    cursor: pointer;
    transition: background var(--transition-fast);
  }

  .faq-question:hover {
    background: rgba(139,92,246,0.04);
  }

  .faq-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: rgba(139,92,246,0.1);
    color: var(--primary);
    font-size: 14px;
    flex-shrink: 0;
    transition: transform var(--transition-fast), background var(--transition-fast);
  }

  .faq-item.active .faq-icon {
    background: var(--gradient-primary);
    color: #fff;
    transform: rotate(45deg);
  }

  .faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease, padding var(--transition-fast), opacity var(--transition-fast);
    opacity: 0;
    padding: 0 26px;
  }

  .faq-item.active .faq-answer {
    max-height: 300px;
    padding: 0 26px 24px;
    opacity: 1;
  }

  .faq-answer p {
    font-size: 14px;
    line-height: 1.7;
    color: var(--text-secondary);
    margin: 0;
    padding-top: 4px;
  }

  /* ========== CTA ========== */
  .cta-section {
    background: var(--bg-secondary);
    padding: 100px 0;
    border-top: 1px solid var(--border);
    position: relative;
    overflow: hidden;
  }

  .cta-section::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(139,92,246,0.08), transparent 70%);
    pointer-events: none;
  }

  .cta-section .container {
    text-align: center;
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
  }

  .cta-section h2 {
    font-size: clamp(28px, 4vw, 42px);
    font-weight: 800;
    line-height: 1.25;
    color: var(--text-main);
    max-width: 600px;
    margin: 0;
  }

  .cta-section p {
    font-size: 16px;
    color: var(--text-secondary);
    max-width: 560px;
    line-height: 1.7;
    margin: 0;
  }

  .cta-note {
    font-size: 13px;
    color: var(--text-dim);
    margin-top: 8px;
  }

  /* ========== 页脚 ========== */
  .site-footer {
    background: #07070D;
    border-top: 1px solid var(--border);
    padding: 70px 0 0;
  }

  .footer-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
    gap: 48px;
    padding-bottom: 50px;
  }

  .footer-brand .nav-logo {
    margin-bottom: 16px;
  }

  .footer-brand-desc {
    font-size: 14px;
    line-height: 1.7;
    color: var(--text-dim);
    margin-top: 16px;
    max-width: 280px;
  }

  .footer-col-title {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 18px;
    position: relative;
    padding-bottom: 10px;
  }

  .footer-col-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 24px;
    height: 2px;
    background: var(--gradient-primary);
    border-radius: 2px;
  }

  .footer-links li {
    margin-bottom: 10px;
  }

  .footer-links a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    color: var(--text-secondary);
    transition: color var(--transition-fast), padding-left var(--transition-fast);
  }

  .footer-links a:hover {
    color: var(--primary);
    padding-left: 4px;
  }

  .footer-links a::before {
    content: '›';
    color: var(--text-dim);
    font-size: 14px;
    font-family: var(--font-num);
  }

  .footer-contact-info p {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 10px;
  }

  .footer-contact-info i {
    color: var(--primary);
    font-size: 14px;
    width: 16px;
    text-align: center;
  }

  .footer-bottom {
    border-top: 1px solid var(--border);
    padding: 24px 0;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 10px;
    font-size: 13px;
    color: var(--text-dim);
  }

  .footer-bottom a {
    color: var(--text-dim);
  }

  .footer-bottom a:hover {
    color: var(--primary);
  }

  /* ========== 响应式 ========== */
  @media (max-width: 1023px) {
    :root {
      --section-padding: 80px;
    }

    .page-hero-inner {
      grid-template-columns: 1fr;
      gap: 48px;
    }

    .page-hero-visual {
      justify-content: flex-start;
    }

    .page-hero-visual img {
      max-width: 340px;
    }

    .steps-grid {
      grid-template-columns: repeat(3, 1fr);
    }

    .guide-grid {
      grid-template-columns: 1fr;
    }

    .faq-layout {
      grid-template-columns: 1fr;
      gap: 40px;
    }

    .faq-sidebar {
      position: static;
    }

    .data-grid {
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }

    .footer-grid {
      grid-template-columns: 1fr 1fr;
      gap: 40px;
    }
  }

  @media (max-width: 767px) {
    :root {
      --section-padding: 64px;
    }

    .container {
      padding-left: 16px;
      padding-right: 16px;
    }

    .site-header {
      padding: 12px 16px;
    }

    .site-header .nav-container {
      padding: 8px 12px 8px 16px;
    }

    .nav-menu {
      position: fixed;
      top: 72px;
      left: 16px;
      right: 16px;
      background: rgba(10,10,18,0.96);
      border: 1px solid var(--border-primary);
      border-radius: 20px;
      padding: 20px;
      opacity: 0;
      visibility: hidden;
      transform: translateY(-12px);
      transition: opacity var(--transition-fast), transform var(--transition-fast), visibility var(--transition-fast);
      box-shadow: 0 24px 64px rgba(0,0,0,0.6);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      z-index: 999;
    }

    .nav-menu.open {
      opacity: 1;
      visibility: visible;
      transform: translateY(0);
    }

    .nav-menu ul {
      flex-direction: column;
      align-items: stretch;
      gap: 4px;
    }

    .nav-menu a {
      display: block;
      padding: 14px 18px;
      border-radius: 12px;
      font-size: 15px;
    }

    .nav-menu a.active {
      background: rgba(139,92,246,0.12);
    }

    .nav-menu a.active::after {
      display: none;
    }

    .nav-cta {
      display: none;
    }

    .nav-toggle {
      display: flex;
    }

    .nav-logo .logo-text {
      font-size: 17px;
    }

    .logo-sub {
      font-size: 9px;
    }

    .page-hero {
      padding: 140px 0 70px;
    }

    .page-hero h1 {
      font-size: 32px;
    }

    .page-hero-desc {
      font-size: 15px;
    }

    .page-hero-actions {
      flex-direction: column;
      width: 100%;
    }

    .page-hero-actions .btn-primary,
    .page-hero-actions .btn-secondary {
      width: 100%;
    }

    .page-hero-visual img {
      max-width: 280px;
      border-radius: 22px;
    }

    .visual-badge {
      left: 0;
      font-size: 11px;
    }

    .visual-info {
      right: 0;
      font-size: 12px;
      padding: 8px 14px;
    }

    .section-head h2 {
      font-size: 26px;
    }

    .steps-grid {
      grid-template-columns: 1fr;
    }

    .step-card {
      padding: 32px 24px 28px;
    }

    .guide-grid {
      grid-template-columns: 1fr;
    }

    .guide-card {
      flex-direction: column;
    }

    .guide-card-cover {
      flex: 0 0 100%;
      min-height: 200px;
    }

    .guide-card-cover::after {
      background: linear-gradient(to bottom, transparent 60%, rgba(18,18,32,0.3));
    }

    .guide-card-body {
      padding: 22px 24px 24px;
    }

    .data-grid {
      grid-template-columns: 1fr 1fr;
      gap: 16px;
    }

    .data-num {
      font-size: 32px;
    }

    .faq-layout {
      grid-template-columns: 1fr;
    }

    .faq-sidebar {
      position: static;
    }

    .faq-question {
      font-size: 15px;
      padding: 18px 20px;
    }

    .faq-answer {
      padding: 0 20px;
    }

    .faq-item.active .faq-answer {
      padding: 0 20px 20px;
    }

    .cta-section {
      padding: 70px 0;
    }

    .cta-section .btn-primary {
      width: 100%;
      padding: 0 24px;
    }

    .footer-grid {
      grid-template-columns: 1fr;
      gap: 36px;
    }

    .footer-bottom {
      flex-direction: column;
      text-align: center;
      justify-content: center;
    }
  }

  @media (max-width: 480px) {
    .logo-text {
      font-size: 15px;
    }

    .logo-mark {
      width: 36px;
      height: 36px;
      font-size: 13px;
    }

    .page-hero h1 {
      font-size: 28px;
    }

    .breadcrumb {
      font-size: 12px;
      padding: 5px 12px;
    }

    .hero-trust {
      gap: 14px;
      flex-direction: column;
      align-items: flex-start;
    }

    .data-item-icon {
      width: 40px;
      height: 40px;
      font-size: 15px;
    }

    .data-num {
      font-size: 26px;
    }

    .data-label {
      font-size: 12px;
    }

    .section-head p {
      font-size: 14px;
    }

    .step-card h3 {
      font-size: 18px;
    }

    .step-card p {
      font-size: 13px;
    }

    .guide-card-body h3 {
      font-size: 18px;
    }

    .guide-card-body p {
      font-size: 13px;
    }

    .faq-sidebar h2 {
      font-size: 28px;
    }

    .cta-section h2 {
      font-size: 24px;
    }
  }

  @media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
      animation-duration: 0.01ms !important;
      animation-iteration-count: 1 !important;
      transition-duration: 0.01ms !important;
      scroll-behavior: auto !important;
    }
  }

/* roulang page: article */
/* ===== Design Variables ===== */
        :root {
            --bg: #0A0A12;
            --bg-alt: #0D0D18;
            --surface: #121220;
            --surface-hover: #181830;
            --primary: #8B5CF6;
            --secondary: #D946EF;
            --accent: #22D3EE;
            --success: #34D399;
            --warning: #FBBF24;
            --error: #F87171;
            --text: #EDEAF9;
            --text-secondary: #9DA1C0;
            --text-dim: #656A89;
            --text-disable: #454968;
            --border: rgba(255, 255, 255, 0.07);
            --card-border: rgba(139, 92, 246, 0.22);
            --glow-primary: rgba(139, 92, 246, 0.35);
            --glow-secondary: rgba(217, 70, 239, 0.45);
            --gradient: linear-gradient(135deg, #8B5CF6, #D946EF);
            --font-cn: 'PingFang SC', 'Microsoft YaHei', 'Noto Sans SC', system-ui, sans-serif;
            --font-en: 'Inter', 'DIN Alternate', 'Barlow Condensed', system-ui;
            --radius-card: 20px;
            --radius-btn: 999px;
            --radius-tag: 12px;
            --radius-img: 16px;
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.35);
            --shadow-card-hover: 0 12px 36px rgba(139, 92, 246, 0.18);
            --shadow-btn: 0 0 28px rgba(139, 92, 246, 0.35);
            --shadow-btn-hover: 0 0 44px rgba(217, 70, 239, 0.45);
            --shadow-nav: 0 8px 32px rgba(0, 0, 0, 0.45);
            --transition: 0.25s ease-out;
        }

        /* ===== Reset / Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-cn);
            font-size: 16px;
            line-height: 1.7;
            background: var(--bg);
            color: var(--text);
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: color var(--transition), border-color var(--transition), background var(--transition), box-shadow var(--transition);
        }
        img {
            max-width: 100%;
            display: block;
            border-radius: var(--radius-img);
        }
        ul,
        ol {
            list-style: none;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
            border: none;
            outline: none;
            background: none;
            color: inherit;
        }
        button {
            cursor: pointer;
        }
        .container {
            max-width: 1180px;
            margin: 0 auto;
            padding: 0 32px;
        }

        /* ===== Buttons ===== */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            height: 52px;
            padding: 0 32px;
            border-radius: var(--radius-btn);
            background: var(--gradient);
            color: #fff;
            font-size: 15px;
            font-weight: 700;
            border: none;
            box-shadow: var(--shadow-btn);
            transition: all var(--transition);
            white-space: nowrap;
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-btn-hover);
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            height: 52px;
            padding: 0 32px;
            border-radius: var(--radius-btn);
            background: transparent;
            color: var(--primary);
            font-size: 15px;
            font-weight: 600;
            border: 1px solid rgba(139, 92, 246, 0.45);
            transition: all var(--transition);
            white-space: nowrap;
        }
        .btn-secondary:hover {
            background: rgba(139, 92, 246, 0.12);
            border-color: var(--primary);
            box-shadow: 0 0 20px rgba(139, 92, 246, 0.15);
        }
        .btn-sm {
            height: 40px;
            padding: 0 22px;
            font-size: 14px;
        }
        .btn-lg {
            height: 60px;
            padding: 0 48px;
            font-size: 16px;
        }
        .text-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--primary);
            font-size: 14px;
            font-weight: 600;
            transition: all var(--transition);
        }
        .text-link i {
            transition: transform var(--transition);
        }
        .text-link:hover i {
            transform: translateX(4px);
        }
        .text-link:hover {
            color: var(--secondary);
        }

        /* ===== Badge / Tag ===== */
        .tag-badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 14px;
            border-radius: var(--radius-tag);
            font-size: 12px;
            font-weight: 600;
            background: rgba(139, 92, 246, 0.15);
            color: var(--primary);
            border: 1px solid rgba(139, 92, 246, 0.25);
        }

        /* ===== Header / Nav ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 1000;
            padding: 14px 0;
            display: flex;
            justify-content: center;
            transition: all var(--transition);
        }
        .site-header.scrolled .nav-container {
            background: rgba(10, 10, 18, 0.82);
            box-shadow: var(--shadow-nav);
            border-color: rgba(139, 92, 246, 0.25);
        }
        .nav-container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 24px;
            max-width: 1180px;
            width: calc(100% - 64px);
            margin: 0 auto;
            padding: 10px 20px 10px 24px;
            border-radius: var(--radius-btn);
            background: rgba(10, 10, 18, 0.72);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid rgba(255, 255, 255, 0.06);
            transition: all var(--transition);
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .logo-mark {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: var(--gradient);
            color: #fff;
            font-family: var(--font-en);
            font-size: 16px;
            font-weight: 800;
            letter-spacing: -0.5px;
            box-shadow: 0 0 18px rgba(139, 92, 246, 0.3);
        }
        .logo-text {
            font-size: 18px;
            font-weight: 800;
            color: var(--text);
            letter-spacing: -0.3px;
            line-height: 1.2;
        }
        .logo-sub {
            display: block;
            font-size: 11px;
            font-weight: 600;
            color: var(--primary);
            letter-spacing: 0.5px;
        }
        .nav-menu {
            display: flex;
            align-items: center;
        }
        .nav-menu ul {
            display: flex;
            align-items: center;
            gap: 4px;
        }
        .nav-menu a {
            display: inline-flex;
            align-items: center;
            padding: 10px 18px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            position: relative;
            transition: all var(--transition);
        }
        .nav-menu a:hover {
            color: var(--text);
            background: rgba(139, 92, 246, 0.1);
        }
        .nav-menu a.active {
            color: var(--primary);
            font-weight: 700;
            background: rgba(139, 92, 246, 0.12);
        }
        .nav-menu a.active::after {
            content: '';
            position: absolute;
            bottom: 4px;
            left: 50%;
            transform: translateX(-50%);
            width: 16px;
            height: 3px;
            border-radius: 3px;
            background: var(--primary);
        }
        .nav-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            padding: 8px;
            border-radius: 8px;
            background: transparent;
            border: 1px solid var(--border);
        }
        .nav-toggle span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--text);
            border-radius: 2px;
            transition: all 0.3s ease;
        }
        .nav-toggle.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .nav-toggle.active span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* ===== Article Page Main ===== */
        .article-page {
            position: relative;
            padding-top: 48px;
            padding-bottom: 80px;
            background:
                radial-gradient(ellipse at 20% 10%, rgba(139, 92, 246, 0.08), transparent 50%),
                radial-gradient(ellipse at 80% 50%, rgba(217, 70, 239, 0.05), transparent 40%),
                var(--bg);
        }
        .article-page .container {
            max-width: 1000px;
        }

        /* Breadcrumb */
        .article-breadcrumb {
            margin-bottom: 28px;
        }
        .breadcrumb-list {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 14px;
            color: var(--text-dim);
        }
        .breadcrumb-list a {
            color: var(--text-secondary);
            transition: color var(--transition);
        }
        .breadcrumb-list a:hover {
            color: var(--primary);
        }
        .breadcrumb-list .breadcrumb-current {
            color: var(--text-secondary);
            max-width: 260px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }
        .breadcrumb-sep {
            font-size: 12px;
            color: var(--text-dim);
        }
        .breadcrumb-list .active {
            color: var(--text-secondary);
        }

        /* Article Card */
        .article-card {
            background: var(--bg-alt);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 48px;
            box-shadow: var(--shadow-card);
            margin-bottom: 48px;
        }

        /* Article Header */
        .article-header {
            text-align: center;
            margin-bottom: 32px;
            border-bottom: 1px solid var(--border);
            padding-bottom: 32px;
        }
        .article-category {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 6px 16px;
            border-radius: var(--radius-tag);
            background: rgba(139, 92, 246, 0.15);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            border: 1px solid rgba(139, 92, 246, 0.25);
            margin-bottom: 16px;
            text-transform: uppercase;
        }
        .article-title {
            font-size: clamp(28px, 4vw, 38px);
            font-weight: 800;
            line-height: 1.3;
            color: var(--text);
            margin-bottom: 16px;
            word-break: break-word;
        }
        .article-meta {
            display: flex;
            align-items: center;
            justify-content: center;
            flex-wrap: wrap;
            gap: 20px;
            font-size: 14px;
            color: var(--text-dim);
        }
        .article-meta-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .article-meta-item i {
            color: var(--primary);
            font-size: 14px;
        }

        /* Article Content */
        .article-content {
            max-width: 720px;
            margin: 0 auto;
            font-size: 17px;
            line-height: 1.8;
            color: var(--text-secondary);
        }
        .article-content p {
            margin-bottom: 1.5em;
            color: var(--text-secondary);
        }
        .article-content strong {
            color: var(--text);
            font-weight: 700;
        }
        .article-content em {
            color: var(--text);
        }
        .article-content h2 {
            font-size: 26px;
            font-weight: 800;
            color: var(--text);
            margin: 2em 0 0.8em;
            line-height: 1.4;
            position: relative;
            padding-left: 16px;
        }
        .article-content h2::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0.2em;
            bottom: 0.2em;
            width: 4px;
            border-radius: 4px;
            background: var(--gradient);
        }
        .article-content h3 {
            font-size: 20px;
            font-weight: 700;
            color: var(--text);
            margin: 1.8em 0 0.6em;
            line-height: 1.4;
        }
        .article-content h4 {
            font-size: 18px;
            font-weight: 600;
            color: var(--text);
            margin: 1.5em 0 0.5em;
        }
        .article-content a {
            color: var(--primary);
            border-bottom: 1px solid rgba(139, 92, 246, 0.3);
        }
        .article-content a:hover {
            color: var(--secondary);
            border-bottom-color: var(--secondary);
        }
        .article-content img {
            border-radius: var(--radius-img);
            margin: 24px 0;
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
        }
        .article-content blockquote {
            border-left: 4px solid var(--primary);
            background: rgba(139, 92, 246, 0.08);
            border-radius: 0 var(--radius-tag) var(--radius-tag) 0;
            padding: 16px 20px;
            margin: 24px 0;
            color: var(--text-secondary);
            font-style: italic;
        }
        .article-content blockquote p {
            margin: 0;
        }
        .article-content ul {
            margin: 20px 0;
            padding-left: 24px;
            list-style: disc;
        }
        .article-content ol {
            margin: 20px 0;
            padding-left: 24px;
            list-style: decimal;
        }
        .article-content li {
            margin-bottom: 8px;
            color: var(--text-secondary);
        }
        .article-content pre {
            background: #0d0d1a;
            border: 1px solid var(--border);
            border-radius: var(--radius-tag);
            padding: 16px 20px;
            overflow-x: auto;
            margin: 24px 0;
            font-family: 'SF Mono', Consolas, monospace;
            font-size: 14px;
            line-height: 1.6;
            color: var(--text);
        }
        .article-content code {
            font-family: 'SF Mono', Consolas, monospace;
            font-size: 0.9em;
            background: rgba(139, 92, 246, 0.12);
            padding: 2px 6px;
            border-radius: 4px;
            color: var(--primary);
        }
        .article-content pre code {
            background: transparent;
            padding: 0;
            color: var(--text);
        }
        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 24px 0;
            font-size: 15px;
        }
        .article-content table th {
            background: rgba(139, 92, 246, 0.1);
            color: var(--text);
            padding: 12px 16px;
            text-align: left;
            border-bottom: 2px solid rgba(139, 92, 246, 0.3);
            font-weight: 700;
        }
        .article-content table td {
            padding: 12px 16px;
            border-bottom: 1px solid var(--border);
            color: var(--text-secondary);
        }
        .article-content table tr:hover td {
            background: rgba(255, 255, 255, 0.02);
        }

        /* Share */
        .article-share {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 12px;
            margin-top: 40px;
            padding-top: 32px;
            border-top: 1px solid var(--border);
            flex-wrap: wrap;
        }
        .share-label {
            font-size: 14px;
            color: var(--text-dim);
            margin-right: 8px;
        }
        .share-btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: var(--surface);
            border: 1px solid var(--border);
            color: var(--text-secondary);
            font-size: 16px;
            transition: all var(--transition);
        }
        .share-btn:hover {
            background: var(--surface-hover);
            border-color: var(--card-border);
            color: var(--primary);
            transform: translateY(-2px);
            box-shadow: 0 8px 20px rgba(139, 92, 246, 0.15);
        }

        /* Not Found */
        .article-not-found {
            background: var(--bg-alt);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 80px 40px;
            text-align: center;
            margin-bottom: 48px;
            box-shadow: var(--shadow-card);
        }
        .article-not-found .nf-icon {
            width: 72px;
            height: 72px;
            margin: 0 auto 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 24px;
            background: rgba(139, 92, 246, 0.1);
            border: 1px solid rgba(139, 92, 246, 0.2);
            font-size: 28px;
            color: var(--primary);
        }
        .article-not-found h1 {
            font-size: 28px;
            font-weight: 800;
            color: var(--text);
            margin-bottom: 12px;
        }
        .article-not-found p {
            color: var(--text-secondary);
            margin-bottom: 24px;
            font-size: 16px;
        }

        /* Related */
        .article-related {
            margin-bottom: 48px;
        }
        .section-head {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 24px;
            gap: 16px;
            flex-wrap: wrap;
        }
        .section-head h2 {
            font-size: 24px;
            font-weight: 800;
            color: var(--text);
            position: relative;
            padding-left: 14px;
        }
        .section-head h2::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0.1em;
            bottom: 0.1em;
            width: 4px;
            border-radius: 4px;
            background: var(--gradient);
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
        }
        .related-card {
            display: flex;
            flex-direction: column;
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            overflow: hidden;
            transition: all var(--transition);
        }
        .related-card:hover {
            border-color: var(--card-border);
            box-shadow: var(--shadow-card-hover);
            transform: translateY(-6px);
        }
        .related-thumb {
            aspect-ratio: 16 / 9;
            overflow: hidden;
            position: relative;
            background: var(--bg-alt);
        }
        .related-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.4s ease;
        }
        .related-card:hover .related-thumb img {
            transform: scale(1.05);
        }
        .related-thumb::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 60%, rgba(10, 10, 18, 0.6));
        }
        .related-info {
            padding: 16px 20px 18px;
            flex: 1;
        }
        .related-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--text);
            line-height: 1.5;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
            transition: color var(--transition);
        }
        .related-card:hover .related-title {
            color: var(--primary);
        }
        .related-date {
            font-size: 13px;
            color: var(--text-dim);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .related-date i {
            font-size: 12px;
        }

        /* CTA */
        .article-cta {
            background: var(--surface);
            border: 1px solid var(--card-border);
            border-radius: var(--radius-card);
            padding: 56px 40px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }
        .article-cta::before {
            content: '';
            position: absolute;
            top: -40%;
            left: 50%;
            transform: translateX(-50%);
            width: 400px;
            height: 400px;
            background: radial-gradient(circle, rgba(139, 92, 246, 0.2), transparent 70%);
            pointer-events: none;
        }
        .cta-content {
            position: relative;
            z-index: 1;
        }
        .cta-title {
            font-size: clamp(24px, 3vw, 32px);
            font-weight: 800;
            color: var(--text);
            margin-bottom: 12px;
            line-height: 1.3;
        }
        .cta-desc {
            font-size: 16px;
            color: var(--text-secondary);
            margin-bottom: 28px;
            max-width: 560px;
            margin-left: auto;
            margin-right: auto;
        }
        .cta-note {
            font-size: 13px;
            color: var(--text-dim);
            margin-top: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            flex-wrap: wrap;
        }
        .cta-note i {
            color: var(--primary);
        }

        /* ===== Footer ===== */
        .site-footer {
            background: #08080F;
            border-top: 1px solid var(--border);
            padding: 64px 0 0;
            margin-top: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 4fr 2fr 2fr 3fr;
            gap: 40px;
            padding-bottom: 48px;
        }
        .footer-brand .nav-logo {
            margin-bottom: 16px;
        }
        .footer-brand-desc {
            font-size: 14px;
            line-height: 1.8;
            color: var(--text-dim);
            max-width: 300px;
        }
        .footer-col-title {
            font-size: 15px;
            font-weight: 700;
            color: var(--text);
            margin-bottom: 16px;
            position: relative;
            padding-bottom: 8px;
        }
        .footer-col-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 24px;
            height: 2px;
            border-radius: 2px;
            background: var(--gradient);
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            font-size: 14px;
            color: var(--text-dim);
            transition: all var(--transition);
        }
        .footer-links a:hover {
            color: var(--primary);
            padding-left: 4px;
        }
        .footer-contact-info p {
            font-size: 14px;
            color: var(--text-dim);
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .footer-contact-info i {
            color: var(--primary);
            width: 20px;
            text-align: center;
        }
        .footer-bottom {
            border-top: 1px solid var(--border);
            padding: 20px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: var(--text-dim);
        }
        .footer-bottom a {
            color: var(--text-dim);
        }
        .footer-bottom a:hover {
            color: var(--primary);
        }

        /* ===== Reveal Animation ===== */
        .reveal {
            opacity: 0;
            transform: translateY(16px);
            transition: opacity 0.6s ease-out, transform 0.6s ease-out;
        }
        .reveal.visible {
            opacity: 1;
            transform: translateY(0);
        }

        /* ===== Responsive ===== */
        @media (max-width: 1024px) {
            .container {
                padding: 0 24px;
            }
            .nav-container {
                width: calc(100% - 32px);
                padding-left: 16px;
                gap: 16px;
            }
            .nav-menu a {
                padding: 10px 14px;
                font-size: 14px;
            }
            .article-card {
                padding: 36px;
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 2fr 1fr 1fr;
                gap: 32px;
            }
            .footer-grid .footer-brand {
                grid-column: 1 / -1;
            }
        }

        @media (max-width: 767px) {
            .container {
                padding: 0 16px;
            }
            .nav-container {
                width: calc(100% - 24px);
                padding: 8px 12px 8px 16px;
                border-radius: 20px;
            }
            .nav-toggle {
                display: flex;
            }
            .nav-menu {
                position: absolute;
                top: calc(100% + 8px);
                left: 12px;
                right: 12px;
                background: rgba(10, 10, 18, 0.96);
                backdrop-filter: blur(20px);
                -webkit-backdrop-filter: blur(20px);
                border: 1px solid var(--border);
                border-radius: 20px;
                padding: 16px;
                display: none;
                flex-direction: column;
                box-shadow: var(--shadow-nav);
            }
            .nav-menu.active {
                display: flex;
            }
            .nav-menu ul {
                flex-direction: column;
                gap: 2px;
                width: 100%;
            }
            .nav-menu a {
                width: 100%;
                justify-content: flex-start;
                padding: 14px 16px;
                font-size: 15px;
            }
            .nav-menu a.active::after {
                left: 16px;
                transform: none;
                width: 12px;
                bottom: auto;
                top: 50%;
                transform: translateY(-50%);
                height: 12px;
                border-radius: 50%;
            }
            .nav-actions .btn-primary {
                display: none;
            }
            .article-page {
                padding-top: 24px;
                padding-bottom: 80px;
            }
            .article-card {
                padding: 24px 20px;
                border-radius: 16px;
            }
            .article-title {
                font-size: 26px;
            }
            .article-meta {
                gap: 12px;
                flex-wrap: wrap;
            }
            .article-content {
                font-size: 16px;
            }
            .article-content h2 {
                font-size: 22px;
                margin-top: 1.5em;
            }
            .article-content h3 {
                font-size: 18px;
            }
            .related-grid {
                grid-template-columns: 1fr;
            }
            .related-card {
                flex-direction: row;
                align-items: center;
            }
            .related-thumb {
                aspect-ratio: auto;
                width: 110px;
                height: 84px;
                flex-shrink: 0;
                border-radius: 12px;
                overflow: hidden;
            }
            .related-info {
                padding: 12px 14px;
                flex: 1;
            }
            .related-title {
                font-size: 15px;
                -webkit-line-clamp: 2;
            }
            .article-cta {
                padding: 40px 24px;
                border-radius: 16px;
            }
            .cta-title {
                font-size: 24px;
            }
            .btn-lg {
                height: 52px;
                padding: 0 32px;
                font-size: 14px;
            }
            .article-share {
                gap: 8px;
            }
            .share-btn {
                width: 44px;
                height: 44px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-brand-desc {
                max-width: 100%;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
                gap: 6px;
            }
            .breadcrumb-list .breadcrumb-current {
                max-width: 160px;
            }
        }

        @media (max-width: 480px) {
            .logo-text {
                font-size: 16px;
            }
            .logo-mark {
                width: 34px;
                height: 34px;
                font-size: 14px;
            }
            .article-card {
                padding: 20px 16px;
            }
            .article-title {
                font-size: 23px;
            }
            .article-breadcrumb {
                margin-bottom: 20px;
            }
            .breadcrumb-list {
                font-size: 13px;
            }
            .section-head h2 {
                font-size: 20px;
            }
            .related-card {
                flex-direction: column;
                align-items: stretch;
            }
            .related-thumb {
                width: 100%;
                height: auto;
                aspect-ratio: 16 / 9;
            }
            .related-info {
                padding: 14px 16px;
            }
        }

        @media (prefers-reduced-motion: reduce) {
            * {
                animation-duration: 0.01ms !important;
                transition-duration: 0.01ms !important;
            }
            html {
                scroll-behavior: auto;
            }
        }

/* roulang page: category3 */
:root {
      --bg-primary: #0A0A12;
      --bg-secondary: #0D0D18;
      --bg-surface: #121220;
      --bg-hover: #181830;
      --accent: #8B5CF6;
      --accent-secondary: #D946EF;
      --accent-info: #22D3EE;
      --success: #34D399;
      --warning: #FBBF24;
      --danger: #F87171;
      --text-main: #EDEAF9;
      --text-secondary: #9DA1C0;
      --text-dim: #656A89;
      --text-disabled: #454968;
      --border-color: rgba(255, 255, 255, 0.07);
      --border-accent: rgba(139, 92, 246, 0.22);
      --glow-main: rgba(139, 92, 246, 0.35);
      --glow-secondary: rgba(217, 70, 239, 0.45);
      --gradient-main: linear-gradient(135deg, #8B5CF6, #D946EF);
      --radius-card: 20px;
      --radius-img: 16px;
      --radius-sm: 12px;
      --radius-pill: 999px;
      --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.35);
      --shadow-hover: 0 12px 36px rgba(139, 92, 246, 0.18);
      --shadow-btn: 0 0 28px rgba(139, 92, 246, 0.35);
      --shadow-btn-hover: 0 0 44px rgba(217, 70, 239, 0.45);
      --shadow-nav: 0 8px 32px rgba(0, 0, 0, 0.45);
      --container-w: 1180px;
      --space-section: 96px;
      --tr: 0.25s ease-out;
    }
    *,
    *::before,
    *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
    }
    body {
      font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, -apple-system, sans-serif;
      background: var(--bg-primary);
      color: var(--text-main);
      font-size: 16px;
      line-height: 1.8;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }
    img {
      max-width: 100%;
      display: block;
    }
    a {
      color: inherit;
      text-decoration: none;
    }
    ul,
    ol {
      list-style: none;
    }
    button,
    input,
    textarea {
      font-family: inherit;
      font-size: inherit;
      border: none;
      outline: none;
      background: none;
      color: inherit;
    }
    .container {
      max-width: var(--container-w);
      margin: 0 auto;
      padding-left: 32px;
      padding-right: 32px;
    }
    .site-header {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      z-index: 1000;
      display: flex;
      justify-content: center;
      padding: 18px 24px;
      pointer-events: none;
    }
    .site-header .nav-inner {
      pointer-events: auto;
      display: flex;
      align-items: center;
      gap: 28px;
      background: rgba(10, 10, 18, 0.72);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: var(--radius-pill);
      padding: 10px 20px;
      box-shadow: var(--shadow-nav);
      transition: var(--tr);
      max-width: 1180px;
      width: 100%;
    }
    .site-header.scrolled .nav-inner {
      background: rgba(10, 10, 18, 0.9);
      border-color: rgba(139, 92, 246, 0.25);
      box-shadow: 0 8px 32px rgba(0, 0, 0, 0.55);
    }
    .nav-logo {
      display: flex;
      align-items: center;
      gap: 10px;
      flex-shrink: 0;
    }
    .logo-mark {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 40px;
      height: 40px;
      border-radius: var(--radius-sm);
      background: var(--gradient-main);
      font-weight: 900;
      font-size: 16px;
      color: #fff;
      font-family: "Inter", "Barlow Condensed", sans-serif;
      letter-spacing: 0.5px;
      box-shadow: 0 0 20px rgba(139, 92, 246, 0.4);
    }
    .logo-text {
      font-weight: 800;
      font-size: 18px;
      line-height: 1.2;
      white-space: nowrap;
    }
    .logo-text .logo-sub {
      color: var(--accent-info);
      font-weight: 600;
      font-size: 13px;
      display: block;
    }
    .nav-menu {
      flex: 1;
      display: flex;
      justify-content: center;
    }
    .nav-menu ul {
      display: flex;
      align-items: center;
      gap: 8px;
      flex-wrap: wrap;
    }
    .nav-menu a {
      display: inline-block;
      padding: 8px 16px;
      border-radius: var(--radius-pill);
      font-size: 15px;
      font-weight: 500;
      color: var(--text-secondary);
      transition: var(--tr);
      position: relative;
    }
    .nav-menu a:hover {
      color: var(--text-main);
      background: rgba(139, 92, 246, 0.12);
    }
    .nav-menu a.active {
      color: #fff;
      background: rgba(139, 92, 246, 0.18);
      font-weight: 700;
    }
    .nav-menu a.active::after {
      content: "";
      position: absolute;
      bottom: 2px;
      left: 50%;
      transform: translateX(-50%);
      width: 12px;
      height: 3px;
      border-radius: 3px;
      background: var(--gradient-main);
    }
    .nav-cta-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
      flex-shrink: 0;
    }
    .nav-cta {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: var(--gradient-main);
      color: #fff;
      padding: 10px 22px;
      border-radius: var(--radius-pill);
      font-weight: 700;
      font-size: 14px;
      white-space: nowrap;
      box-shadow: var(--shadow-btn);
      transition: var(--tr);
    }
    .nav-cta:hover {
      box-shadow: var(--shadow-btn-hover);
      transform: translateY(-2px);
    }
    .nav-toggle {
      display: none;
      width: 42px;
      height: 42px;
      border-radius: 50%;
      background: rgba(255, 255, 255, 0.06);
      border: 1px solid rgba(255, 255, 255, 0.1);
      color: #fff;
      font-size: 18px;
      cursor: pointer;
      align-items: center;
      justify-content: center;
      transition: var(--tr);
    }
    .nav-toggle:hover {
      background: rgba(139, 92, 246, 0.2);
    }
    .site-main {
      padding-top: 0;
    }
    .faq-hero {
      position: relative;
      padding: 170px 0 72px;
      background: var(--bg-primary);
      overflow: hidden;
    }
    .faq-hero::before {
      content: "";
      position: absolute;
      inset: 0;
      background:
        radial-gradient(ellipse at 30% 20%, rgba(139, 92, 246, 0.16), transparent 55%),
        radial-gradient(ellipse at 75% 55%, rgba(217, 70, 239, 0.1), transparent 50%),
        radial-gradient(ellipse at 55% 80%, rgba(34, 211, 238, 0.06), transparent 45%);
      pointer-events: none;
    }
    .faq-hero .container {
      position: relative;
      z-index: 2;
      text-align: center;
      max-width: 820px;
    }
    .faq-hero .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: rgba(139, 92, 246, 0.12);
      border: 1px solid rgba(139, 92, 246, 0.28);
      color: var(--accent-info);
      font-size: 13px;
      font-weight: 600;
      padding: 6px 16px;
      border-radius: var(--radius-pill);
      margin-bottom: 24px;
    }
    .faq-hero .hero-badge i {
      font-size: 14px;
    }
    .faq-hero h1 {
      font-size: clamp(44px, 5vw, 64px);
      font-weight: 900;
      line-height: 1.15;
      margin-bottom: 18px;
      background: linear-gradient(135deg, #fff 30%, var(--accent-info) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .faq-hero .hero-subline {
      font-size: 17px;
      color: var(--text-secondary);
      max-width: 600px;
      margin: 0 auto;
      line-height: 1.8;
    }
    .faq-section {
      position: relative;
      padding: 80px 0 var(--space-section);
      background: var(--bg-secondary);
    }
    .faq-section::before {
      content: "";
      position: absolute;
      inset: 0;
      background-image: linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px);
      background-size: 100% 60px;
      pointer-events: none;
    }
    .faq-layout {
      position: relative;
      z-index: 2;
      display: grid;
      grid-template-columns: 240px 1fr;
      gap: 48px;
      align-items: start;
    }
    .faq-sidebar {
      position: sticky;
      top: 110px;
    }
    .faq-sidebar .sidebar-title {
      font-size: 16px;
      font-weight: 800;
      margin-bottom: 16px;
      color: var(--text-main);
      letter-spacing: 0.3px;
    }
    .faq-sidebar .sidebar-nav {
      border-radius: var(--radius-card);
      border: 1px solid var(--border-color);
      background: rgba(18, 18, 32, 0.6);
      padding: 8px;
      overflow: hidden;
    }
    .faq-sidebar .sidebar-nav a {
      display: flex;
      align-items: center;
      gap: 8px;
      padding: 10px 12px;
      border-radius: 12px;
      font-size: 14px;
      color: var(--text-secondary);
      transition: var(--tr);
      margin-bottom: 2px;
    }
    .faq-sidebar .sidebar-nav a:last-child {
      margin-bottom: 0;
    }
    .faq-sidebar .sidebar-nav a:hover {
      background: rgba(139, 92, 246, 0.1);
      color: var(--text-main);
    }
    .faq-sidebar .sidebar-nav a.active {
      background: rgba(139, 92, 246, 0.16);
      color: #fff;
      font-weight: 600;
    }
    .faq-list {
      display: flex;
      flex-direction: column;
      gap: 16px;
    }
    .faq-card {
      border: 1px solid var(--border-color);
      border-radius: var(--radius-card);
      background: var(--bg-surface);
      overflow: hidden;
      transition: var(--tr);
    }
    .faq-card:hover {
      border-color: var(--border-accent);
      box-shadow: var(--shadow-hover);
    }
    .faq-card.active {
      border-color: var(--accent);
      box-shadow: var(--shadow-hover);
    }
    .faq-q {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      padding: 22px 26px;
      cursor: pointer;
      font-weight: 600;
      font-size: 16px;
      color: var(--text-main);
      transition: var(--tr);
      user-select: none;
    }
    .faq-q .faq-icon {
      width: 28px;
      height: 28px;
      border-radius: 50%;
      background: rgba(139, 92, 246, 0.12);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 14px;
      color: var(--accent);
      flex-shrink: 0;
      transition: var(--tr);
    }
    .faq-card.active .faq-icon {
      background: var(--gradient-main);
      color: #fff;
      transform: rotate(45deg);
    }
    .faq-a {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.45s cubic-bezier(0.4, 0, 0.2, 1);
    }
    .faq-a-inner {
      padding: 0 26px 22px;
      color: var(--text-secondary);
      font-size: 15px;
      line-height: 1.85;
      border-top: 1px solid rgba(255, 255, 255, 0.04);
    }
    .faq-card.active .faq-a {
      max-height: 320px;
    }
    .faq-card.active .faq-a-inner {
      padding-top: 16px;
    }
    .contact-area {
      padding: var(--space-section) 0;
      background: var(--bg-primary);
      position: relative;
    }
    .contact-area::before {
      content: "";
      position: absolute;
      bottom: 0;
      left: 0;
      right: 0;
      height: 300px;
      background: radial-gradient(ellipse at 60% 100%, rgba(139, 92, 246, 0.08), transparent 70%);
      pointer-events: none;
    }
    .contact-grid {
      position: relative;
      z-index: 2;
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 56px;
      align-items: center;
    }
    .contact-content h2 {
      font-size: clamp(34px, 3.5vw, 48px);
      font-weight: 900;
      line-height: 1.25;
      margin-bottom: 20px;
    }
    .contact-content h2 span {
      background: var(--gradient-main);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .contact-content p {
      color: var(--text-secondary);
      font-size: 15px;
      line-height: 1.85;
      margin-bottom: 14px;
      max-width: 480px;
    }
    .contact-points {
      display: flex;
      flex-direction: column;
      gap: 14px;
      margin-top: 24px;
    }
    .contact-points li {
      display: flex;
      align-items: center;
      gap: 12px;
      color: var(--text-main);
      font-size: 15px;
    }
    .contact-points li i {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: rgba(139, 92, 246, 0.12);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      color: var(--accent);
      font-size: 14px;
      flex-shrink: 0;
    }
    .contact-form-card {
      border: 1px solid var(--border-color);
      border-radius: var(--radius-card);
      background: var(--bg-surface);
      padding: 36px;
      box-shadow: var(--shadow-card);
    }
    .form-group {
      margin-bottom: 20px;
    }
    .form-group label {
      display: block;
      font-size: 13px;
      font-weight: 600;
      color: var(--text-secondary);
      margin-bottom: 8px;
      letter-spacing: 0.5px;
    }
    .form-group input,
    .form-group textarea {
      width: 100%;
      background: rgba(10, 10, 18, 0.6);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: var(--radius-sm);
      padding: 14px 16px;
      font-size: 15px;
      color: var(--text-main);
      transition: var(--tr);
    }
    .form-group input:focus,
    .form-group textarea:focus {
      border-color: var(--accent);
      box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.12);
    }
    .form-group input::placeholder,
    .form-group textarea::placeholder {
      color: var(--text-disabled);
    }
    .form-group textarea {
      resize: vertical;
      min-height: 100px;
    }
    .submit-btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      background: var(--gradient-main);
      color: #fff;
      border-radius: var(--radius-pill);
      padding: 14px 36px;
      font-weight: 700;
      font-size: 15px;
      cursor: pointer;
      box-shadow: var(--shadow-btn);
      transition: var(--tr);
      width: 100%;
      margin-top: 8px;
      border: none;
    }
    .submit-btn:hover {
      box-shadow: var(--shadow-btn-hover);
      transform: translateY(-2px);
    }
    .submit-btn:active {
      transform: translateY(0);
    }
    .form-privacy {
      font-size: 12px;
      color: var(--text-dim);
      text-align: center;
      margin-top: 14px;
      line-height: 1.6;
    }
    .faq-cta {
      position: relative;
      padding: 72px 0;
      background: var(--gradient-main);
      overflow: hidden;
    }
    .faq-cta::before {
      content: "";
      position: absolute;
      inset: 0;
      background: radial-gradient(ellipse at 30% 50%, rgba(255, 255, 255, 0.15), transparent 60%);
      pointer-events: none;
    }
    .cta-inner {
      position: relative;
      z-index: 2;
      text-align: center;
      max-width: 680px;
      margin: 0 auto;
    }
    .cta-inner h2 {
      font-size: clamp(28px, 3vw, 40px);
      font-weight: 900;
      line-height: 1.3;
      color: #fff;
      margin-bottom: 14px;
    }
    .cta-inner p {
      color: rgba(255, 255, 255, 0.85);
      font-size: 16px;
      line-height: 1.8;
      margin-bottom: 28px;
    }
    .cta-btn {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      background: #fff;
      color: #7c3aed;
      font-weight: 800;
      font-size: 16px;
      padding: 16px 40px;
      border-radius: var(--radius-pill);
      box-shadow: 0 8px 30px rgba(0, 0, 0, 0.25);
      transition: var(--tr);
    }
    .cta-btn:hover {
      transform: translateY(-3px);
      box-shadow: 0 12px 40px rgba(0, 0, 0, 0.35);
    }
    .site-footer {
      background: #08080F;
      border-top: 1px solid rgba(255, 255, 255, 0.04);
      padding: 64px 0 0;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 0.8fr 0.8fr 1fr;
      gap: 48px;
      padding-bottom: 40px;
    }
    .footer-brand-desc {
      color: var(--text-secondary);
      font-size: 14px;
      line-height: 1.8;
      margin-top: 16px;
      max-width: 320px;
    }
    .footer-col-title {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 16px;
    }
    .footer-links li {
      margin-bottom: 10px;
    }
    .footer-links a {
      color: var(--text-secondary);
      font-size: 14px;
      transition: var(--tr);
    }
    .footer-links a:hover {
      color: var(--accent);
      padding-left: 4px;
    }
    .footer-contact-info p {
      color: var(--text-secondary);
      font-size: 14px;
      margin-bottom: 10px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .footer-contact-info i {
      width: 16px;
      text-align: center;
      color: var(--accent);
    }
    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.04);
      padding: 22px 0;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 8px;
    }
    .footer-bottom span {
      font-size: 13px;
      color: var(--text-dim);
    }
    .footer-bottom a {
      color: var(--text-dim);
      transition: var(--tr);
    }
    .footer-bottom a:hover {
      color: var(--accent);
    }
    .reveal {
      opacity: 0;
      transform: translateY(16px);
      transition: opacity 0.7s ease, transform 0.7s ease;
    }
    .reveal.visible {
      opacity: 1;
      transform: translateY(0);
    }
    .mobile-bar {
      display: none;
    }
    @media (max-width: 1023px) {
      .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 36px;
      }
      .contact-grid {
        grid-template-columns: 1fr;
        gap: 36px;
      }
      .faq-layout {
        grid-template-columns: 1fr;
      }
      .faq-sidebar {
        position: static;
        margin-bottom: 8px;
      }
    }
    @media (max-width: 767px) {
      .container {
        padding-left: 20px;
        padding-right: 20px;
      }
      .site-header {
        padding: 12px 16px;
      }
      .site-header .nav-inner {
        gap: 10px;
        padding: 8px 12px;
      }
      .nav-menu {
        display: none;
      }
      .nav-menu.open {
        display: block;
        position: absolute;
        top: calc(100% + 8px);
        left: 0;
        right: 0;
        background: rgba(10, 10, 18, 0.95);
        backdrop-filter: blur(20px);
        border: 1px solid rgba(255, 255, 255, 0.08);
        border-radius: 20px;
        padding: 16px;
        box-shadow: var(--shadow-nav);
      }
      .nav-menu.open ul {
        flex-direction: column;
        align-items: stretch;
        gap: 4px;
      }
      .nav-menu.open a {
        display: block;
        padding: 12px 16px;
        text-align: center;
      }
      .nav-cta {
        display: none;
      }
      .nav-toggle {
        display: inline-flex;
      }
      .faq-hero {
        padding: 140px 0 48px;
      }
      .faq-hero h1 {
        font-size: 34px;
      }
      .faq-section {
        padding: 56px 0 64px;
      }
      .faq-q {
        padding: 16px 18px;
        font-size: 15px;
      }
      .faq-a-inner {
        padding: 0 18px 18px;
      }
      .contact-area {
        padding: 64px 0;
      }
      .contact-form-card {
        padding: 24px 20px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 28px;
      }
      .footer-bottom {
        flex-direction: column;
        text-align: center;
      }
    }
    @media (max-width: 480px) {
      .faq-sidebar .sidebar-nav {
        display: flex;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        gap: 4px;
        padding: 6px;
      }
      .faq-sidebar .sidebar-nav a {
        flex-shrink: 0;
        white-space: nowrap;
        font-size: 13px;
        padding: 8px 14px;
      }
    }
    @media (prefers-reduced-motion: reduce) {
      * {
        animation: none !important;
        transition: none !important;
      }
      .reveal {
        opacity: 1;
        transform: none;
      }
    }

/* roulang page: category2 */
/* ============ 设计变量 ============ */
        :root {
            --bg-primary: #0A0A12;
            --bg-secondary: #0D0D18;
            --bg-surface: #121220;
            --bg-surface-hover: #181830;
            --accent-violet: #8B5CF6;
            --accent-magenta: #D946EF;
            --accent-cyan: #22D3EE;
            --success: #34D399;
            --warning: #FBBF24;
            --danger: #F87171;
            --text-primary: #EDEAF9;
            --text-secondary: #9DA1C0;
            --text-dim: #656A89;
            --text-disabled: #454968;
            --border-subtle: rgba(255, 255, 255, 0.07);
            --border-card: rgba(139, 92, 246, 0.22);
            --glow-violet: rgba(139, 92, 246, 0.35);
            --glow-magenta: rgba(217, 70, 239, 0.45);
            --gradient-primary: linear-gradient(135deg, #8B5CF6, #D946EF);
            --radius-card: 20px;
            --radius-small: 12px;
            --radius-image: 16px;
            --radius-pill: 999px;
            --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.35);
            --shadow-card-hover: 0 12px 36px rgba(139, 92, 246, 0.18);
            --shadow-btn: 0 0 28px rgba(139, 92, 246, 0.35);
            --shadow-btn-hover: 0 0 44px rgba(217, 70, 239, 0.45);
            --shadow-nav: 0 8px 32px rgba(0, 0, 0, 0.45);
            --transition-base: 0.25s ease-out;
            --container-max: 1180px;
            --section-spacing: 96px;
        }

        /* ============ Reset & Base ============ */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
            background: var(--bg-primary);
            color: var(--text-primary);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition-base);
        }
        img {
            max-width: 100%;
            display: block;
        }
        button {
            font-family: inherit;
            cursor: pointer;
            border: none;
            background: none;
        }
        input,
        textarea {
            font-family: inherit;
        }
        ul {
            list-style: none;
        }
        .container {
            max-width: var(--container-max);
            margin: 0 auto;
            padding-left: 32px;
            padding-right: 32px;
        }

        /* ============ 导航 ============ */
        .site-header {
            position: fixed;
            top: 18px;
            left: 0;
            right: 0;
            z-index: 1000;
            display: flex;
            justify-content: center;
            padding: 0 24px;
            pointer-events: none;
        }
        .nav-shell {
            pointer-events: auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 28px;
            width: 100%;
            max-width: 1180px;
            padding: 12px 28px;
            background: rgba(10, 10, 18, 0.72);
            backdrop-filter: blur(20px);
            -webkit-backdrop-filter: blur(20px);
            border: 1px solid rgba(255, 255, 255, 0.08);
            border-radius: var(--radius-pill);
            box-shadow: 0 4px 24px rgba(0, 0, 0, 0.3);
            transition: background 0.3s ease, box-shadow 0.3s ease;
        }
        .site-header.scrolled .nav-shell {
            background: rgba(10, 10, 18, 0.88);
            box-shadow: var(--shadow-nav);
            border-color: rgba(139, 92, 246, 0.18);
        }
        .nav-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }
        .logo-mark {
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: var(--gradient-primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            font-weight: 900;
            color: #fff;
            letter-spacing: -0.5px;
            box-shadow: 0 0 18px rgba(139, 92, 246, 0.35);
        }
        .logo-text {
            font-size: 20px;
            font-weight: 800;
            color: var(--text-primary);
            letter-spacing: 0.5px;
            line-height: 1.2;
        }
        .logo-sub {
            display: block;
            font-size: 12px;
            font-weight: 500;
            color: var(--text-secondary);
            letter-spacing: 2px;
        }
        .nav-menu ul {
            display: flex;
            align-items: center;
            gap: 6px;
        }
        .nav-menu a {
            display: inline-block;
            padding: 8px 18px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text-secondary);
            transition: color var(--transition-base), background var(--transition-base), box-shadow var(--transition-base);
            position: relative;
        }
        .nav-menu a::after {
            content: '';
            position: absolute;
            bottom: 2px;
            left: 50%;
            transform: translateX(-50%);
            width: 0;
            height: 2px;
            border-radius: 2px;
            background: var(--gradient-primary);
            transition: width 0.25s ease;
        }
        .nav-menu a:hover {
            color: var(--text-primary);
            background: rgba(139, 92, 246, 0.1);
        }
        .nav-menu a:hover::after {
            width: 18px;
        }
        .nav-menu a.active {
            color: #fff;
            background: rgba(139, 92, 246, 0.18);
            box-shadow: inset 0 0 0 1px rgba(139, 92, 246, 0.3);
        }
        .nav-menu a.active::after {
            width: 18px;
        }
        .nav-cta {
            flex-shrink: 0;
        }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            height: 52px;
            padding: 0 32px;
            border-radius: var(--radius-pill);
            background: var(--gradient-primary);
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            box-shadow: var(--shadow-btn);
            transition: all var(--transition-base);
            border: none;
            cursor: pointer;
            white-space: nowrap;
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-btn-hover);
            color: #fff;
        }
        .btn-primary:active {
            transform: translateY(0);
        }
        .btn-primary.btn-sm {
            height: 44px;
            padding: 0 24px;
            font-size: 15px;
        }
        .btn-secondary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            height: 52px;
            padding: 0 32px;
            border-radius: var(--radius-pill);
            background: transparent;
            color: var(--accent-violet);
            border: 1px solid rgba(139, 92, 246, 0.45);
            font-size: 16px;
            font-weight: 600;
            transition: all var(--transition-base);
            cursor: pointer;
            white-space: nowrap;
        }
        .btn-secondary:hover {
            background: rgba(139, 92, 246, 0.12);
            color: var(--accent-violet);
            border-color: rgba(139, 92, 246, 0.7);
            transform: translateY(-2px);
        }
        .btn-secondary:active {
            transform: translateY(0);
        }

        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border-radius: 50%;
            background: rgba(139, 92, 246, 0.15);
            border: 1px solid rgba(139, 92, 246, 0.3);
            color: var(--text-primary);
            font-size: 20px;
            align-items: center;
            justify-content: center;
            cursor: pointer;
        }

        /* ============ 分类页 Hero ============ */
        .category-hero {
            position: relative;
            padding: 190px 0 90px;
            background:
                linear-gradient(135deg, rgba(10, 10, 18, 0.92), rgba(13, 13, 24, 0.85)),
                url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
            text-align: center;
            overflow: hidden;
        }
        .category-hero::before {
            content: '';
            position: absolute;
            top: -60%;
            left: 50%;
            transform: translateX(-50%);
            width: 700px;
            height: 700px;
            border-radius: 50%;
            background: radial-gradient(circle, rgba(139, 92, 246, 0.22), transparent 70%);
            pointer-events: none;
        }
        .category-hero .container {
            position: relative;
            z-index: 2;
        }
        .category-hero-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(139, 92, 246, 0.15);
            border: 1px solid rgba(139, 92, 246, 0.3);
            color: var(--accent-cyan);
            font-size: 13px;
            font-weight: 600;
            padding: 6px 18px;
            border-radius: var(--radius-pill);
            letter-spacing: 1px;
            margin-bottom: 24px;
        }
        .category-hero h1 {
            font-size: clamp(38px, 5vw, 56px);
            font-weight: 900;
            line-height: 1.2;
            margin-bottom: 18px;
            background: linear-gradient(135deg, #fff, #D8CCFF);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
        }
        .category-hero-sub {
            font-size: 18px;
            color: var(--text-secondary);
            max-width: 640px;
            margin: 0 auto 36px;
            line-height: 1.7;
        }
        .category-hero .hero-btns {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }

        /* ============ 数据亮点通栏 ============ */
        .data-strip {
            background: var(--bg-secondary);
            border-bottom: 1px solid var(--border-subtle);
            padding: 30px 0;
        }
        .data-strip .container {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 40px;
        }
        .data-strip-item {
            text-align: center;
            padding: 12px 24px;
            border-right: 1px solid var(--border-subtle);
        }
        .data-strip-item:last-child {
            border-right: none;
        }
        .data-strip-num {
            font-family: "Inter", "DIN Alternate", "Barlow Condensed", system-ui, sans-serif;
            font-size: 46px;
            font-weight: 800;
            letter-spacing: -1px;
            background: var(--gradient-primary);
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            line-height: 1.2;
        }
        .data-strip-label {
            font-size: 14px;
            color: var(--text-secondary);
            margin-top: 6px;
        }

        /* ============ 特色交替区 ============ */
        .features-alternate {
            padding: var(--section-spacing) 0;
            background: var(--bg-primary);
        }
        .section-heading {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 56px;
        }
        .section-heading .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent-cyan);
            letter-spacing: 2px;
            margin-bottom: 12px;
        }
        .section-heading h2 {
            font-size: clamp(26px, 3vw, 34px);
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 14px;
        }
        .section-heading p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.7;
        }
        .feature-row {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 64px;
            align-items: center;
            padding: 48px 0;
        }
        .feature-row+.feature-row {
            border-top: 1px solid var(--border-subtle);
        }
        .feature-media {
            position: relative;
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-card);
            border: 1px solid rgba(255, 255, 255, 0.06);
            transition: box-shadow var(--transition-base);
        }
        .feature-media img {
            width: 100%;
            height: 320px;
            object-fit: cover;
            transition: transform 0.5s ease;
        }
        .feature-media:hover img {
            transform: scale(1.03);
        }
        .feature-content {
            padding: 20px 0;
        }
        .feature-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent-magenta);
            background: rgba(217, 70, 239, 0.12);
            padding: 5px 14px;
            border-radius: var(--radius-pill);
            margin-bottom: 18px;
            letter-spacing: 0.5px;
        }
        .feature-content h3 {
            font-size: 26px;
            font-weight: 800;
            line-height: 1.3;
            margin-bottom: 14px;
        }
        .feature-content>p {
            font-size: 16px;
            color: var(--text-secondary);
            line-height: 1.8;
            margin-bottom: 22px;
        }
        .feature-list {
            margin-bottom: 24px;
        }
        .feature-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            padding: 8px 0;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.6;
        }
        .feature-list li i {
            color: var(--accent-cyan);
            font-size: 14px;
            margin-top: 5px;
            flex-shrink: 0;
        }
        .feature-row.reverse .feature-media {
            order: 2;
        }
        .feature-row.reverse .feature-content {
            order: 1;
        }

        /* ============ FAQ 区块 ============ */
        .faq-section-cat {
            background: var(--bg-secondary);
            padding: var(--section-spacing) 0;
            border-top: 1px solid var(--border-subtle);
            border-bottom: 1px solid var(--border-subtle);
        }
        .faq-grid {
            display: grid;
            grid-template-columns: 0.8fr 1.2fr;
            gap: 48px;
        }
        .faq-sidebar {
            position: sticky;
            top: 120px;
            align-self: start;
        }
        .faq-sidebar h2 {
            font-size: 28px;
            font-weight: 800;
            margin-bottom: 12px;
        }
        .faq-sidebar .section-tag {
            display: inline-block;
            font-size: 13px;
            font-weight: 600;
            color: var(--accent-cyan);
            letter-spacing: 2px;
            margin-bottom: 12px;
        }
        .faq-sidebar p {
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.7;
            margin-bottom: 24px;
        }
        .faq-accordion {
            display: flex;
            flex-direction: column;
            gap: 14px;
        }
        .faq-item {
            background: var(--bg-surface);
            border: 1px solid var(--border-subtle);
            border-radius: var(--radius-card);
            padding: 20px 24px;
            transition: border-color var(--transition-base), box-shadow var(--transition-base);
        }
        .faq-item:hover {
            border-color: var(--border-card);
            box-shadow: var(--shadow-card);
        }
        .faq-item.open {
            border-color: rgba(139, 92, 246, 0.35);
            box-shadow: 0 8px 30px rgba(139, 92, 246, 0.1);
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            cursor: pointer;
            font-size: 16px;
            font-weight: 700;
            color: var(--text-primary);
            line-height: 1.5;
        }
        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: rgba(139, 92, 246, 0.15);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            color: var(--accent-violet);
            transition: transform 0.3s ease, background 0.3s ease;
        }
        .faq-item.open .faq-icon {
            transform: rotate(45deg);
            background: var(--gradient-primary);
            color: #fff;
        }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.8;
        }
        .faq-item.open .faq-answer {
            max-height: 300px;
            padding-top: 14px;
        }

        /* ============ CTA 条 ============ */
        .cat-cta {
            position: relative;
            background: var(--bg-primary);
            padding: 90px 0;
            overflow: hidden;
            text-align: center;
        }
        .cat-cta::before {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            width: 800px;
            height: 500px;
            background: radial-gradient(ellipse, rgba(139, 92, 246, 0.2), rgba(217, 70, 239, 0.08) 50%, transparent 70%);
            pointer-events: none;
        }
        .cat-cta .container {
            position: relative;
            z-index: 2;
        }
        .cat-cta h2 {
            font-size: clamp(28px, 4vw, 40px);
            font-weight: 900;
            line-height: 1.3;
            margin-bottom: 14px;
        }
        .cat-cta p {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 560px;
            margin: 0 auto 32px;
            line-height: 1.7;
        }
        .cat-cta .cta-note {
            font-size: 13px;
            color: var(--text-dim);
            margin-top: 18px;
        }

        /* ============ 页脚 ============ */
        .site-footer {
            background: #08080F;
            border-top: 1px solid var(--border-subtle);
            padding-top: 60px;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-brand .nav-logo {
            margin-bottom: 16px;
        }
        .footer-brand-desc {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.8;
            max-width: 280px;
            margin-top: 12px;
        }
        .footer-col-title {
            font-size: 16px;
            font-weight: 700;
            color: var(--text-primary);
            margin-bottom: 18px;
            letter-spacing: 0.5px;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            font-size: 14px;
            color: var(--text-secondary);
            transition: color var(--transition-base), padding-left 0.25s ease;
        }
        .footer-links a:hover {
            color: var(--accent-violet);
            padding-left: 4px;
        }
        .footer-contact-info p {
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .footer-contact-info i {
            color: var(--accent-violet);
            font-size: 14px;
            width: 18px;
            text-align: center;
        }
        .footer-bottom {
            padding: 20px 0;
            border-top: 1px solid var(--border-subtle);
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: var(--text-dim);
        }
        .footer-bottom a {
            color: var(--text-secondary);
        }

        /* ============ 移动端一键跟买悬浮条 ============ */
        .mobile-float-bar {
            display: none;
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            z-index: 999;
            background: rgba(10, 10, 18, 0.92);
            backdrop-filter: blur(16px);
            -webkit-backdrop-filter: blur(16px);
            border-top: 1px solid rgba(139, 92, 246, 0.2);
            padding: 12px 20px;
            padding-bottom: calc(12px + env(safe-area-inset-bottom));
            justify-content: space-between;
            align-items: center;
            gap: 16px;
        }
        .mobile-float-bar .btn-primary {
            flex: 1;
            height: 46px;
            font-size: 15px;
        }
        .mobile-float-bar .to-top {
            width: 46px;
            height: 46px;
            border-radius: 50%;
            background: rgba(139, 92, 246, 0.15);
            border: 1px solid rgba(139, 92, 246, 0.3);
            color: var(--accent-cyan);
            font-size: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        /* ============ Reveal 动画 ============ */
        .reveal {
            opacity: 0;
            transform: translateY(16px);
            transition: opacity 0.6s ease-out, transform 0.6s ease-out;
        }
        .reveal.visible {
            opacity: 1;
            transform: translateY(0);
        }
        @media (prefers-reduced-motion: reduce) {
            .reveal {
                opacity: 1;
                transform: none;
                transition: none;
            }
            html {
                scroll-behavior: auto;
            }
        }

        /* ============ 响应式 ============ */
        @media (max-width: 1024px) {
            .container {
                padding-left: 24px;
                padding-right: 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .feature-row {
                gap: 40px;
            }
            .feature-media img {
                height: 260px;
            }
        }
        @media (max-width: 768px) {
            :root {
                --section-spacing: 64px;
            }
            .site-header {
                top: 12px;
                padding: 0 14px;
            }
            .nav-shell {
                border-radius: 24px;
                padding: 10px 16px;
            }
            .nav-menu {
                display: none;
                position: absolute;
                top: calc(100% + 10px);
                left: 14px;
                right: 14px;
                background: rgba(10, 10, 18, 0.96);
                border: 1px solid rgba(139, 92, 246, 0.2);
                border-radius: 20px;
                padding: 20px;
                box-shadow: var(--shadow-nav);
                backdrop-filter: blur(24px);
                -webkit-backdrop-filter: blur(24px);
            }
            .nav-menu.open {
                display: block;
            }
            .nav-menu ul {
                flex-direction: column;
                align-items: stretch;
                gap: 8px;
            }
            .nav-menu a {
                display: block;
                padding: 12px 16px;
                text-align: center;
                font-size: 16px;
                border-radius: 14px;
            }
            .nav-menu a::after {
                display: none;
            }
            .nav-cta {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .category-hero {
                padding: 140px 0 60px;
            }
            .category-hero h1 {
                font-size: 32px;
            }
            .category-hero-sub {
                font-size: 16px;
                padding: 0 10px;
            }
            .data-strip .container {
                grid-template-columns: 1fr;
                gap: 20px;
            }
            .data-strip-item {
                border-right: none;
                border-bottom: 1px solid var(--border-subtle);
                padding-bottom: 20px;
            }
            .data-strip-item:last-child {
                border-bottom: none;
                padding-bottom: 0;
            }
            .data-strip-num {
                font-size: 38px;
            }
            .feature-row {
                grid-template-columns: 1fr;
                gap: 24px;
                padding: 32px 0;
            }
            .feature-row.reverse .feature-media {
                order: 1;
            }
            .feature-row.reverse .feature-content {
                order: 2;
            }
            .feature-media img {
                height: 220px;
            }
            .faq-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .faq-sidebar {
                position: static;
            }
            .faq-sidebar h2 {
                font-size: 24px;
            }
            .cat-cta {
                padding: 60px 0;
            }
            .cat-cta h2 {
                font-size: 26px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .mobile-float-bar {
                display: flex;
            }
            body {
                padding-bottom: 70px;
            }
        }
        @media (max-width: 480px) {
            .container {
                padding-left: 18px;
                padding-right: 18px;
            }
            .nav-shell {
                padding: 8px 12px;
            }
            .logo-mark {
                width: 34px;
                height: 34px;
                font-size: 14px;
                border-radius: 10px;
            }
            .logo-text {
                font-size: 17px;
            }
            .logo-sub {
                font-size: 11px;
                letter-spacing: 1px;
            }
            .category-hero {
                padding-top: 120px;
            }
            .category-hero h1 {
                font-size: 28px;
            }
            .hero-btns .btn-primary,
            .hero-btns .btn-secondary {
                width: 100%;
                height: 48px;
                font-size: 15px;
            }
            .feature-content h3 {
                font-size: 22px;
            }
            .section-heading h2 {
                font-size: 24px;
            }
        }
        @media (min-width: 769px) and (max-width: 1023px) {
            .hero-btns {
                flex-wrap: wrap;
            }
        }