/* roulang page: index */
:root {
  --brand: #F5C518;
  --brand-deep: #E8A400;
  --brand-gradient: linear-gradient(135deg, #F5C518 0%, #E8A400 100%);
  --bg-dark: #0B0B0E;
  --card-bg: #141418;
  --card-hover: #1D1D23;
  --text-main: #FFFFFF;
  --text-secondary: #A9A9B3;
  --text-weak: #6E6E78;
  --border: rgba(255,255,255,0.08);
  --border-hover: rgba(255,255,255,0.14);
  --success: #27C07F;
  --radius-card: 16px;
  --radius-btn: 999px;
  --radius-sm: 12px;
  --shadow-default: 0 8px 24px rgba(0,0,0,0.30);
  --shadow-hover: 0 20px 48px rgba(0,0,0,0.45);
  --container-w: 1200px;
  --transition: all 0.25s ease-out;
  --font-main: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  background-color: var(--bg-dark);
  color: var(--text-main);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition);
}

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

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

ul, ol {
  list-style: none;
}

h1, h2, h3, h4, h5 {
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.015em;
  color: var(--text-main);
}

p {
  color: var(--text-secondary);
}

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

.section {
  padding: 100px 0;
  position: relative;
}

.section-head {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 56px;
}

.section-head.left {
  text-align: left;
  margin-left: 0;
  margin-bottom: 32px;
}

.section-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--brand);
  background: rgba(245,197,24,0.10);
  border: 1px solid rgba(245,197,24,0.25);
  border-radius: 999px;
  padding: 6px 16px;
  margin-bottom: 16px;
}

.section-head h2 {
  font-size: 36px;
  margin-bottom: 16px;
}

.section-head p {
  font-size: 15px;
  line-height: 1.75;
  color: var(--text-secondary);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 50px;
  padding: 0 28px;
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.02em;
  transition: var(--transition);
  cursor: pointer;
  border: 1px solid transparent;
  white-space: nowrap;
}

.btn-primary {
  background: var(--brand-gradient);
  color: #0B0B0E;
  box-shadow: 0 8px 24px rgba(245,197,24,0.22);
}

.btn-primary:hover {
  filter: brightness(1.08);
  transform: translateY(-2px);
  box-shadow: 0 12px 32px rgba(245,197,24,0.30);
  color: #0B0B0E;
}

.btn-primary:active {
  transform: translateY(0);
  filter: brightness(0.96);
}

.btn-primary:focus-visible {
  outline: 3px solid rgba(245,197,24,0.5);
  outline-offset: 2px;
}

.btn-ghost {
  background: rgba(255,255,255,0.04);
  border-color: var(--border-hover);
  color: var(--text-main);
}

.btn-ghost:hover {
  background: rgba(255,255,255,0.08);
  border-color: rgba(245,197,24,0.5);
  color: var(--brand);
  transform: translateY(-2px);
}

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

.btn-ghost:focus-visible {
  outline: 3px solid rgba(245,197,24,0.35);
  outline-offset: 2px;
}

.btn-small {
  height: 44px;
  padding: 0 22px;
  font-size: 14px;
}

/* Reveal animation */
.js .reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

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

/* Nav */
.site-nav-wrap {
  position: absolute;
  top: 24px;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 0 24px;
}

.nav-panel {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--container-w);
  margin: 0 auto;
  background: rgba(20,20,24,0.92);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  height: 80px;
  padding: 0 16px 0 24px;
  backdrop-filter: blur(14px);
  box-shadow: var(--shadow-default);
}

.nav-brand {
  font-size: 22px;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.01em;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.nav-brand i {
  color: var(--brand);
  font-size: 18px;
}

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

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 100px;
  height: 48px;
  padding: 0 16px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  transition: var(--transition);
}

.nav-link i {
  margin-right: 6px;
  font-size: 13px;
  color: var(--text-weak);
  transition: var(--transition);
}

.nav-link:hover {
  color: var(--text-main);
  background: rgba(255,255,255,0.06);
  border-color: var(--border-hover);
  transform: translateY(-2px);
}

.nav-link.active {
  color: #0B0B0E;
  background: var(--brand-gradient);
  border-color: transparent;
  font-weight: 600;
  box-shadow: 0 4px 16px rgba(245,197,24,0.25);
}

.nav-link.active i {
  color: #0B0B0E;
}

.nav-cta {
  margin-left: 12px;
}

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(255,255,255,0.04);
  color: var(--text-main);
  font-size: 18px;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.nav-toggle:hover {
  border-color: rgba(245,197,24,0.4);
  color: var(--brand);
}

.nav-toggle.active {
  color: var(--brand);
  border-color: var(--brand);
}

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 180px 0 80px;
  background: url('/assets/images/backpic/back-1.jpg') center center / cover no-repeat;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(11,11,14,0.1) 0%, rgba(11,11,14,0.82) 100%);
  z-index: 1;
}

.hero::after {
  content: '';
  position: absolute;
  top: 20%;
  right: 8%;
  width: 420px;
  height: 420px;
  background: radial-gradient(circle, rgba(245,197,24,0.16) 0%, transparent 70%);
  z-index: 1;
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 2;
  width: 100%;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 500;
  color: var(--brand);
  background: rgba(245,197,24,0.10);
  border: 1px solid rgba(245,197,24,0.3);
  border-radius: 999px;
  padding: 8px 18px;
  margin-bottom: 24px;
  letter-spacing: 0.02em;
}

.hero-badge i {
  font-size: 12px;
}

.hero h1 {
  font-size: 56px;
  line-height: 1.15;
  margin-bottom: 24px;
  max-width: 680px;
}

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

.hero-desc {
  font-size: 16px;
  line-height: 1.8;
  color: var(--text-secondary);
  max-width: 560px;
  margin-bottom: 32px;
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 32px;
}

.hero-trust {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 28px;
  align-items: center;
}

.hero-trust span {
  font-size: 14px;
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

.hero-trust span::before {
  content: '✓';
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: rgba(39,192,127,0.15);
  color: var(--success);
  font-size: 11px;
  font-weight: 700;
}

.hero-right {
  display: flex;
  justify-content: center;
}

.progress-ring-wrap {
  text-align: center;
}

.progress-ring {
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: conic-gradient(var(--brand) 0% 82%, rgba(255,255,255,0.08) 82% 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  box-shadow: 0 0 50px rgba(245,197,24,0.18);
  animation: ringPulse 3s ease-in-out infinite;
}

@keyframes ringPulse {
  0%, 100% { box-shadow: 0 0 40px rgba(245,197,24,0.15); }
  50% { box-shadow: 0 0 70px rgba(245,197,24,0.28); }
}

.progress-ring-inner {
  width: 178px;
  height: 178px;
  border-radius: 50%;
  background: var(--bg-dark);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255,255,255,0.06);
}

.progress-ring-inner strong {
  font-size: 52px;
  font-weight: 800;
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1;
}

.progress-ring-inner span {
  font-size: 13px;
  color: var(--text-weak);
  margin-top: 8px;
  letter-spacing: 0.05em;
}

.progress-ring-wrap p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
}

/* Plan preview */
.plan-preview {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 72px;
}

.plan-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.plan-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: transparent;
  transition: var(--transition);
}

.plan-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.plan-card:hover::before {
  background: var(--brand-gradient);
}

.plan-featured .plan-badge {
  position: absolute;
  top: 14px;
  right: 14px;
  font-size: 11px;
  font-weight: 600;
  color: #0B0B0E;
  background: var(--brand-gradient);
  border-radius: 999px;
  padding: 4px 12px;
}

.plan-card h3 {
  font-size: 18px;
  margin-bottom: 4px;
}

.plan-price {
  font-size: 22px;
  font-weight: 700;
  margin-bottom: 14px;
}

.plan-price small {
  font-size: 13px;
  color: var(--text-weak);
  font-weight: 400;
}

.plan-card p {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.plan-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--brand);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.plan-link i {
  transition: transform 0.2s ease;
}

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

/* Timeline section */
.timeline-section {
  background: var(--bg-dark);
}

.timeline {
  position: relative;
  max-width: 100%;
}

.timeline::before {
  content: '';
  position: absolute;
  left: 8px;
  top: 8px;
  bottom: 8px;
  width: 2px;
  border-radius: 2px;
  background: linear-gradient(180deg, rgba(245,197,24,0.5), rgba(245,197,24,0.06));
}

.timeline-item {
  position: relative;
  padding-left: 40px;
  padding-bottom: 32px;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 6px;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: var(--bg-dark);
  border: 3px solid var(--brand);
  box-shadow: 0 0 0 5px rgba(245,197,24,0.12);
}

.timeline-date {
  display: inline-block;
  font-size: 12px;
  letter-spacing: 0.03em;
  color: var(--brand);
  background: rgba(245,197,24,0.10);
  border-radius: 999px;
  padding: 4px 14px;
  margin-bottom: 10px;
}

.timeline-content h3 {
  font-size: 18px;
  margin-bottom: 6px;
}

.timeline-content p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.65;
}

.update-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 20px;
  overflow: hidden;
  transition: var(--transition);
  height: 100%;
}

.update-card:hover {
  border-color: var(--border-hover);
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}

.update-card img {
  width: 100%;
  height: 220px;
  object-fit: cover;
  transition: transform 0.4s ease-out;
}

.update-card:hover img {
  transform: scale(1.02);
}

.update-card-body {
  padding: 24px;
}

.update-card-body h3 {
  font-size: 17px;
  margin-bottom: 8px;
}

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

.update-status {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--success);
  margin-top: 12px;
}

.update-status::before {
  content: '';
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 0 4px rgba(39,192,127,0.15);
}

/* FAQ */
.faq-section {
  background: linear-gradient(180deg, var(--bg-dark) 0%, #101014 100%);
}

.faq-list {
  max-width: 860px;
  margin: 0 auto;
}

.faq-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  margin-bottom: 14px;
  overflow: hidden;
  transition: var(--transition);
}

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

.faq-question {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: none;
  border: none;
  padding: 22px 24px;
  color: var(--text-main);
  font-size: 17px;
  font-weight: 600;
  cursor: pointer;
  text-align: left;
  line-height: 1.5;
  transition: color 0.2s ease;
}

.faq-question:hover {
  color: var(--brand);
}

.faq-question::after {
  content: '+';
  font-size: 24px;
  color: var(--brand);
  font-weight: 400;
  transition: transform 0.3s ease;
  flex-shrink: 0;
  margin-left: 16px;
}

.faq-item.active .faq-question::after {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  padding: 0 24px;
  color: var(--text-secondary);
  font-size: 15px;
  line-height: 1.75;
  transition: max-height 0.3s ease, padding 0.3s ease;
}

.faq-item.active .faq-answer {
  max-height: 500px;
  padding-bottom: 22px;
}

/* News / Articles */
.news-section {
  background: var(--bg-dark);
}

.article-list {
  border-top: 1px solid var(--border);
}

.article-item {
  padding: 24px 0;
  border-bottom: 1px solid var(--border);
  transition: background 0.25s ease;
}

.article-item:hover {
  padding-left: 12px;
}

.article-link {
  display: block;
  color: var(--text-main);
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
  line-height: 1.4;
  transition: color 0.2s ease;
}

.article-link::before {
  content: '›';
  color: var(--brand);
  font-weight: 700;
  margin-right: 8px;
}

.article-link:hover {
  color: var(--brand);
}

.article-meta {
  font-size: 12px;
  color: var(--text-weak);
  letter-spacing: 0.03em;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 8px;
}

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

.side-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 24px;
  margin-bottom: 20px;
  transition: var(--transition);
}

.side-card:hover {
  border-color: var(--border-hover);
}

.side-card h3 {
  font-size: 16px;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.side-card h3 i {
  color: var(--brand);
  font-size: 14px;
}

.tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  display: inline-block;
  font-size: 12px;
  color: var(--text-secondary);
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 6px 14px;
  transition: var(--transition);
}

.tag:hover {
  color: var(--brand);
  border-color: rgba(245,197,24,0.5);
  transform: translateY(-2px);
}

.side-link-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
  line-height: 1.5;
  color: var(--text-secondary);
  transition: color 0.2s ease;
}

.side-link-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.side-link-item:hover {
  color: var(--brand);
}

.side-link-item i {
  color: var(--brand);
  font-size: 12px;
  margin-top: 6px;
  flex-shrink: 0;
}

.stats-grid {
  display: flex;
  justify-content: space-between;
  text-align: center;
}

.stats-grid .stat {
  flex: 1;
}

.stats-grid .stat + .stat {
  border-left: 1px solid var(--border);
}

.stat strong {
  display: block;
  font-size: 28px;
  font-weight: 800;
  color: var(--brand);
  line-height: 1.2;
}

.stat span {
  font-size: 12px;
  color: var(--text-weak);
  margin-top: 4px;
  display: block;
}

/* Security */
.security-section {
  background: #101014;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.security-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 32px 28px;
  height: 100%;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.security-card::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--brand-gradient);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease-out;
}

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

.security-card:hover::after {
  transform: scaleX(1);
}

.security-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-sm);
  background: rgba(245,197,24,0.12);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--brand);
  font-size: 20px;
  margin-bottom: 20px;
}

.security-card h3 {
  font-size: 18px;
  margin-bottom: 10px;
}

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

.security-note {
  margin-top: 48px;
  text-align: center;
  background: rgba(245,197,24,0.06);
  border: 1px solid rgba(245,197,24,0.18);
  border-radius: var(--radius-card);
  padding: 24px 32px;
  font-size: 14px;
  color: var(--text-secondary);
}

.security-note strong {
  color: var(--brand);
}

/* App section */
.app-section {
  background: var(--bg-dark);
}

.app-visual {
  border-radius: 20px;
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-hover);
  position: relative;
}

.app-visual img {
  width: 100%;
  height: 380px;
  object-fit: cover;
  transition: transform 0.5s ease-out;
}

.app-visual:hover img {
  transform: scale(1.02);
}

.app-visual-badge {
  position: absolute;
  bottom: 16px;
  left: 16px;
  background: rgba(11,11,14,0.85);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 10px 16px;
  font-size: 13px;
  color: var(--text-main);
  backdrop-filter: blur(8px);
}

.app-content h2 {
  font-size: 34px;
  margin-bottom: 16px;
}

.app-content > p {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 28px;
  max-width: 480px;
}

.feature-list {
  margin-bottom: 28px;
}

.feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 10px 0;
  font-size: 15px;
  color: var(--text-secondary);
}

.feature-list li i {
  color: var(--brand);
  font-size: 14px;
  margin-top: 6px;
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: rgba(245,197,24,0.10);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
}

.download-btns {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.download-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  height: 48px;
  padding: 0 24px;
  border-radius: var(--radius-btn);
  border: 1px solid var(--border-hover);
  background: rgba(255,255,255,0.04);
  color: var(--text-main);
  font-size: 14px;
  font-weight: 600;
  transition: var(--transition);
}

.download-btn i {
  color: var(--brand);
  font-size: 16px;
}

.download-btn:hover {
  border-color: rgba(245,197,24,0.5);
  background: rgba(245,197,24,0.08);
  transform: translateY(-2px);
}

/* Final CTA */
.cta-section {
  background: var(--bg-dark);
  padding-top: 40px;
}

.cta-banner {
  position: relative;
  background: linear-gradient(135deg, rgba(245,197,24,0.14), rgba(232,164,0,0.04)), url('/assets/images/backpic/back-2.jpg') center center / cover no-repeat;
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 64px 40px;
  text-align: center;
  overflow: hidden;
}

.cta-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(11,11,14,0.6);
}

.cta-banner h2, .cta-banner p, .cta-banner .btn {
  position: relative;
  z-index: 1;
}

.cta-banner h2 {
  font-size: 34px;
  margin-bottom: 12px;
}

.cta-banner p {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 28px;
}

/* Footer */
.site-footer {
  background: #101014;
  border-top: 1px solid var(--border);
  padding: 64px 0 32px;
}

.footer-brand-title {
  font-size: 20px;
  font-weight: 800;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.footer-brand-title i {
  color: var(--brand);
}

.footer-brand-text {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
  max-width: 320px;
  margin-bottom: 20px;
}

.footer-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}

.footer-links a {
  display: block;
  font-size: 14px;
  color: var(--text-secondary);
  padding: 6px 0;
  transition: color 0.2s ease;
}

.footer-links a:hover {
  color: var(--brand);
}

.footer-contact {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 2;
}

.footer-contact i {
  color: var(--brand);
  margin-right: 8px;
  width: 16px;
}

.footer-bottom {
  border-top: 1px solid var(--border);
  margin-top: 48px;
  padding-top: 24px;
  text-align: center;
  font-size: 13px;
  color: var(--text-weak);
}

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

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

/* Bottom fixed bar */
.bottom-fixed {
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  z-index: 90;
  background: rgba(20,20,24,0.88);
  backdrop-filter: blur(12px);
  border-top: 1px solid var(--border);
  min-height: 72px;
  display: flex;
  align-items: center;
  padding: 12px 0;
}

.bottom-fixed-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  width: 100%;
}

.bottom-fixed p {
  margin: 0;
  font-size: 15px;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 10px;
}

.bottom-fixed p i {
  color: var(--brand);
  font-size: 16px;
}

.bottom-fixed .btn {
  flex-shrink: 0;
}

.bottom-spacer {
  height: 96px;
}

/* Responsive */
@media (max-width: 1024px) {
  .hero h1 {
    font-size: 44px;
  }
  .nav-link {
    min-width: 80px;
    padding: 0 12px;
    font-size: 13px;
  }
  .plan-preview {
    gap: 14px;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 72px 0;
  }
  .section-head h2 {
    font-size: 28px;
  }
  .hero {
    padding: 140px 0 60px;
  }
  .hero h1 {
    font-size: 38px;
  }
  .hero-right {
    margin-top: 48px;
  }
  .plan-preview {
    grid-template-columns: 1fr;
    margin-top: 48px;
  }
  .update-card {
    margin-top: 32px;
  }
  .app-content h2 {
    font-size: 28px;
  }
  .cta-banner {
    padding: 48px 24px;
  }
  .cta-banner h2 {
    font-size: 26px;
  }
  .nav-panel {
    height: 68px;
    padding: 0 12px 0 18px;
  }
  .nav-toggle {
    display: flex;
  }
  .nav-links {
    display: none;
    position: absolute;
    top: 80px;
    left: 12px;
    right: 12px;
    flex-direction: column;
    align-items: stretch;
    background: rgba(20,20,24,0.97);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 16px;
    gap: 10px;
    box-shadow: var(--shadow-hover);
    backdrop-filter: blur(14px);
  }
  .nav-links.open {
    display: flex;
  }
  .nav-link {
    width: 100%;
    min-height: 48px;
    justify-content: flex-start;
    padding: 0 16px;
  }
  .nav-cta {
    margin-left: 0;
  }
  .bottom-fixed p {
    font-size: 13px;
  }
  .bottom-fixed p i {
    display: none;
  }
  .bottom-fixed .btn {
    height: 44px;
    padding: 0 18px;
    font-size: 14px;
  }
}

@media (max-width: 520px) {
  .grid-container {
    padding-left: 18px;
    padding-right: 18px;
  }
  .section {
    padding: 64px 0;
  }
  .section-head {
    margin-bottom: 40px;
  }
  .hero h1 {
    font-size: 32px;
  }
  .hero-desc {
    font-size: 15px;
  }
  .hero-trust {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
  }
  .progress-ring {
    width: 180px;
    height: 180px;
  }
  .progress-ring-inner {
    width: 144px;
    height: 144px;
  }
  .progress-ring-inner strong {
    font-size: 40px;
  }
  .plan-card {
    padding: 22px;
  }
  .timeline-content h3 {
    font-size: 16px;
  }
  .app-visual img {
    height: 260px;
  }
  .stats-grid .stat strong {
    font-size: 22px;
  }
  .bottom-fixed {
    min-height: 64px;
  }
  .bottom-fixed p {
    max-width: 55%;
  }
  .bottom-spacer {
    height: 80px;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation: none !important;
    transition: none !important;
  }
  .js .reveal {
    opacity: 1 !important;
    transform: none !important;
  }
}

/* roulang page: category1 */
:root {
            --brand: #F5C518;
            --brand-deep: #E8A400;
            --brand-gradient: linear-gradient(135deg, #F5C518 0%, #E8A400 100%);
            --bg-dark: #0B0B0E;
            --card-bg: #141418;
            --card-hover: #1D1D23;
            --text-main: #FFFFFF;
            --text-secondary: #A9A9B3;
            --text-weak: #6E6E78;
            --border: rgba(255, 255, 255, 0.08);
            --border-hover: rgba(255, 255, 255, 0.14);
            --success: #27C07F;
            --radius-card: 16px;
            --radius-btn: 999px;
            --radius-sm: 12px;
            --shadow-default: 0 8px 24px rgba(0, 0, 0, 0.30);
            --shadow-hover: 0 20px 48px rgba(0, 0, 0, 0.45);
            --container-w: 1200px;
            --transition: all 0.25s ease-out;
            --font-main: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", system-ui, sans-serif;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-main);
            background-color: var(--bg-dark);
            color: var(--text-main);
            font-size: 16px;
            line-height: 1.75;
            -webkit-font-smoothing: antialiased;
            overflow-x: hidden;
        }

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

        a {
            color: inherit;
            text-decoration: none;
            transition: var(--transition);
        }

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

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

        h1,
        h2,
        h3,
        h4,
        p,
        ul,
        ol,
        figure {
            margin: 0;
            padding: 0;
        }

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

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

        .section {
            padding: 100px 0;
            position: relative;
        }

        .section-head {
            text-align: center;
            max-width: 760px;
            margin: 0 auto 56px;
        }

        .section-head.left {
            text-align: left;
            margin-left: 0;
            margin-bottom: 32px;
        }

        .section-tag {
            display: inline-block;
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.08em;
            text-transform: uppercase;
            color: var(--brand);
            background: rgba(245, 197, 24, 0.10);
            border: 1px solid rgba(245, 197, 24, 0.25);
            border-radius: 999px;
            padding: 6px 16px;
            margin-bottom: 16px;
        }

        .section-head h2 {
            font-size: 36px;
            margin-bottom: 16px;
            font-weight: 800;
            letter-spacing: -0.02em;
            line-height: 1.25;
        }

        .section-head p {
            font-size: 15px;
            line-height: 1.75;
            color: var(--text-secondary);
        }

        /* Buttons */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            height: 50px;
            padding: 0 28px;
            border-radius: var(--radius-btn);
            font-size: 15px;
            font-weight: 600;
            letter-spacing: 0.02em;
            transition: var(--transition);
            cursor: pointer;
            border: 1px solid transparent;
            white-space: nowrap;
        }

        .btn-primary {
            background: var(--brand-gradient);
            color: #0B0B0E;
            box-shadow: 0 8px 24px rgba(245, 197, 24, 0.22);
        }

        .btn-primary:hover {
            filter: brightness(1.08);
            transform: translateY(-2px);
            box-shadow: 0 12px 32px rgba(245, 197, 24, 0.30);
            color: #0B0B0E;
        }

        .btn-primary:active {
            transform: translateY(0);
            filter: brightness(0.96);
        }

        .btn-primary:focus-visible {
            outline: 3px solid rgba(245, 197, 24, 0.5);
            outline-offset: 2px;
        }

        .btn-ghost {
            background: rgba(255, 255, 255, 0.04);
            border-color: var(--border-hover);
            color: var(--text-main);
        }

        .btn-ghost:hover {
            background: rgba(255, 255, 255, 0.08);
            border-color: rgba(245, 197, 24, 0.5);
            color: var(--brand);
            transform: translateY(-2px);
        }

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

        .btn-ghost:focus-visible {
            outline: 3px solid rgba(245, 197, 24, 0.35);
            outline-offset: 2px;
        }

        .btn-small {
            height: 44px;
            padding: 0 22px;
            font-size: 14px;
        }

        /* Nav */
        .site-nav-wrap {
            position: absolute;
            top: 24px;
            left: 0;
            right: 0;
            z-index: 100;
            padding: 0 24px;
        }

        .nav-panel {
            display: flex;
            align-items: center;
            justify-content: space-between;
            max-width: var(--container-w);
            margin: 0 auto;
            background: rgba(20, 20, 24, 0.92);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            height: 80px;
            padding: 0 16px 0 24px;
            backdrop-filter: blur(14px);
            box-shadow: var(--shadow-default);
        }

        .nav-brand {
            font-size: 22px;
            font-weight: 800;
            color: var(--text-main);
            letter-spacing: -0.01em;
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }

        .nav-brand i {
            color: var(--brand);
            font-size: 18px;
        }

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

        .nav-links {
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .nav-link {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 100px;
            height: 48px;
            padding: 0 16px;
            border-radius: var(--radius-sm);
            font-size: 14px;
            font-weight: 500;
            color: var(--text-secondary);
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid var(--border);
            transition: var(--transition);
        }

        .nav-link i {
            margin-right: 6px;
            font-size: 13px;
            color: var(--text-weak);
            transition: var(--transition);
        }

        .nav-link:hover {
            color: var(--text-main);
            background: rgba(255, 255, 255, 0.06);
            border-color: var(--border-hover);
            transform: translateY(-2px);
        }

        .nav-link.active {
            color: #0B0B0E;
            background: var(--brand-gradient);
            border-color: transparent;
            font-weight: 600;
            box-shadow: 0 4px 16px rgba(245, 197, 24, 0.25);
        }

        .nav-link.active i {
            color: #0B0B0E;
        }

        .nav-cta {
            margin-left: 12px;
        }

        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border-radius: 12px;
            border: 1px solid var(--border);
            background: rgba(255, 255, 255, 0.04);
            color: var(--text-main);
            font-size: 18px;
            align-items: center;
            justify-content: center;
            transition: var(--transition);
        }

        .nav-toggle:hover {
            border-color: rgba(245, 197, 24, 0.4);
            color: var(--brand);
        }

        .nav-toggle.active {
            color: var(--brand);
            border-color: var(--brand);
        }

        /* Category Hero */
        .category-hero {
            position: relative;
            padding: 170px 0 90px;
            background: url('/assets/images/backpic/back-4.jpg') center center / cover no-repeat;
            border-bottom: 1px solid var(--border);
            overflow: hidden;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(11, 11, 14, 0.90) 0%, rgba(11, 11, 14, 0.72) 55%, rgba(11, 11, 14, 0.35) 100%);
            z-index: 1;
        }

        .category-hero::after {
            content: '';
            position: absolute;
            top: 15%;
            right: 6%;
            width: 360px;
            height: 360px;
            background: radial-gradient(circle, rgba(245, 197, 24, 0.14) 0%, transparent 70%);
            z-index: 1;
            pointer-events: none;
        }

        .category-hero-inner {
            position: relative;
            z-index: 2;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-secondary);
            margin-bottom: 24px;
        }

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

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

        .breadcrumb i {
            font-size: 12px;
            color: var(--text-weak);
        }

        .breadcrumb .current {
            color: var(--text-main);
            font-weight: 500;
        }

        .category-hero h1 {
            font-size: 52px;
            font-weight: 800;
            line-height: 1.15;
            letter-spacing: -0.02em;
            max-width: 720px;
            margin-bottom: 20px;
        }

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

        .category-hero .lead {
            font-size: 17px;
            line-height: 1.8;
            color: var(--text-secondary);
            max-width: 600px;
            margin-bottom: 32px;
        }

        .category-hero-actions {
            display: flex;
            align-items: center;
            gap: 16px;
            flex-wrap: wrap;
        }

        .hero-badges {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-top: 36px;
            flex-wrap: wrap;
        }

        .hero-badge-item {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            height: 34px;
            padding: 0 16px;
            border-radius: 999px;
            background: rgba(255, 255, 255, 0.04);
            border: 1px solid var(--border);
            font-size: 13px;
            color: var(--text-secondary);
        }

        .hero-badge-item i {
            color: var(--brand);
            font-size: 12px;
        }

        /* Features */
        .features-section {
            padding: 100px 0 40px;
        }

        .feature-card {
            position: relative;
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 32px 28px;
            height: 100%;
            transition: var(--transition);
            overflow: hidden;
        }

        .feature-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 2px;
            background: var(--brand-gradient);
            opacity: 0;
            transition: var(--transition);
        }

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

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

        .feature-card:first-child::before {
            opacity: 1;
        }

        .feature-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: rgba(245, 197, 24, 0.12);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--brand);
            margin-bottom: 20px;
        }

        .feature-card h3 {
            font-size: 20px;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 10px;
        }

        .feature-card p {
            font-size: 14px;
            line-height: 1.75;
            color: var(--text-secondary);
            margin-bottom: 20px;
        }

        .feature-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 13px;
            font-weight: 600;
            color: var(--brand);
            padding-top: 16px;
            border-top: 1px solid var(--border);
            width: 100%;
        }

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

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

        /* Filter */
        .video-grid-section {
            padding: 60px 0 100px;
        }

        .filter-panel {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            padding: 20px;
            margin-bottom: 40px;
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .filter-chip {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            height: 42px;
            padding: 0 20px;
            border-radius: 999px;
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid var(--border);
            color: var(--text-secondary);
            font-size: 14px;
            font-weight: 500;
            transition: var(--transition);
            cursor: pointer;
        }

        .filter-chip:hover {
            color: var(--text-main);
            border-color: var(--border-hover);
            background: rgba(255, 255, 255, 0.06);
            transform: translateY(-2px);
        }

        .filter-chip.active {
            background: var(--brand-gradient);
            color: #0B0B0E;
            border-color: transparent;
            font-weight: 600;
            box-shadow: 0 4px 16px rgba(245, 197, 24, 0.25);
        }

        .filter-chip i {
            font-size: 13px;
        }

        /* Video Cards */
        .video-card {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            overflow: hidden;
            display: flex;
            flex-direction: column;
            transition: var(--transition);
            height: 100%;
        }

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

        .video-card-media {
            position: relative;
            aspect-ratio: 16 / 9;
            overflow: hidden;
            background: #1a1a1f;
        }

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

        .video-card:hover .video-card-media img {
            transform: scale(1.04);
        }

        .video-card-tag {
            position: absolute;
            top: 12px;
            left: 12px;
            display: inline-flex;
            align-items: center;
            gap: 4px;
            height: 28px;
            padding: 0 14px;
            border-radius: 999px;
            background: rgba(11, 11, 14, 0.78);
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.14);
            font-size: 12px;
            font-weight: 600;
            letter-spacing: 0.04em;
            color: var(--text-main);
        }

        .video-card-body {
            display: flex;
            flex-direction: column;
            flex: 1;
            padding: 24px;
        }

        .video-card-body h3 {
            font-size: 18px;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 10px;
        }

        .video-card-body p {
            font-size: 14px;
            line-height: 1.75;
            color: var(--text-secondary);
            flex: 1;
            margin-bottom: 20px;
        }

        .video-card-meta {
            display: flex;
            align-items: center;
            gap: 16px;
            padding-top: 16px;
            border-top: 1px solid var(--border);
            margin-bottom: 18px;
            font-size: 12px;
            color: var(--text-weak);
        }

        .video-card-meta i {
            margin-right: 4px;
        }

        .video-card .btn {
            width: 100%;
        }

        /* Pagination */
        .pagination-wrap {
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 8px;
            margin-top: 48px;
        }

        .page-link {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            min-width: 44px;
            height: 44px;
            padding: 0 12px;
            border-radius: 12px;
            background: rgba(255, 255, 255, 0.03);
            border: 1px solid var(--border);
            color: var(--text-secondary);
            font-size: 14px;
            font-weight: 500;
            transition: var(--transition);
        }

        .page-link:hover {
            border-color: rgba(245, 197, 24, 0.4);
            color: var(--brand);
            transform: translateY(-2px);
        }

        .page-link.active {
            background: var(--brand-gradient);
            color: #0B0B0E;
            border-color: transparent;
            font-weight: 700;
            box-shadow: 0 4px 16px rgba(245, 197, 24, 0.25);
        }

        .page-ellipsis {
            color: var(--text-weak);
            padding: 0 4px;
        }

        /* Stats */
        .stats-section {
            background: #101014;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
            padding: 70px 0;
        }

        .stat-item {
            text-align: center;
            padding: 30px 20px;
            position: relative;
        }

        .stat-item+.stat-item::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 1px;
            height: 64px;
            background: var(--border);
        }

        .stat-number {
            font-size: 46px;
            font-weight: 800;
            color: var(--brand);
            line-height: 1.2;
            letter-spacing: -0.02em;
        }

        .stat-label {
            font-size: 13px;
            color: var(--text-secondary);
            letter-spacing: 0.06em;
            margin-top: 8px;
        }

        /* Steps */
        .steps-section {
            padding: 100px 0;
        }

        .step-item {
            position: relative;
            padding: 32px 28px;
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            height: 100%;
            transition: var(--transition);
        }

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

        .step-num {
            font-size: 40px;
            font-weight: 800;
            line-height: 1;
            color: transparent;
            -webkit-text-stroke: 1.5px rgba(245, 197, 24, 0.7);
            margin-bottom: 20px;
            font-family: Georgia, "Times New Roman", serif;
        }

        .step-item h3 {
            font-size: 20px;
            font-weight: 700;
            line-height: 1.4;
            margin-bottom: 12px;
        }

        .step-item p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.75;
        }

        /* FAQ */
        .faq-section {
            padding: 100px 0;
            background: #0E0E12;
        }

        .faq-wrap {
            max-width: 820px;
            margin: 0 auto;
        }

        .faq-item {
            border-bottom: 1px solid var(--border);
        }

        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            padding: 24px 0;
            font-size: 16px;
            font-weight: 600;
            color: var(--text-main);
            cursor: pointer;
            transition: var(--transition);
            text-align: left;
            width: 100%;
            background: none;
            border: none;
        }

        .faq-question:hover {
            color: var(--brand);
        }

        .faq-icon {
            position: relative;
            width: 32px;
            height: 32px;
            border-radius: 50%;
            border: 1px solid var(--border-hover);
            flex-shrink: 0;
            transition: all 0.3s ease;
        }

        .faq-icon::before,
        .faq-icon::after {
            content: '';
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            background: var(--brand);
            border-radius: 2px;
            transition: all 0.3s ease;
        }

        .faq-icon::before {
            width: 14px;
            height: 2px;
        }

        .faq-icon::after {
            width: 2px;
            height: 14px;
        }

        .faq-item.active .faq-icon {
            background: var(--brand-gradient);
            border-color: transparent;
        }

        .faq-item.active .faq-icon::before,
        .faq-item.active .faq-icon::after {
            background: #0B0B0E;
        }

        .faq-item.active .faq-icon::after {
            opacity: 0;
            transform: translate(-50%, -50%) rotate(90deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease;
        }

        .faq-answer-inner {
            padding: 0 0 24px;
            font-size: 15px;
            line-height: 1.75;
            color: var(--text-secondary);
            max-width: 92%;
        }

        .faq-item.active .faq-answer {
            max-height: 500px;
        }

        /* CTA */
        .cta-section {
            padding: 100px 0;
        }

        .cta-banner {
            position: relative;
            padding: 90px 54px;
            text-align: center;
            background: url('/assets/images/backpic/back-6.jpg') center center / cover no-repeat;
            border-radius: 24px;
            overflow: hidden;
            border: 1px solid var(--border);
        }

        .cta-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(11, 11, 14, 0.78);
            z-index: 1;
        }

        .cta-banner::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 520px;
            height: 260px;
            background: radial-gradient(ellipse at bottom, rgba(245, 197, 24, 0.15) 0%, transparent 70%);
            z-index: 1;
            pointer-events: none;
        }

        .cta-banner-inner {
            position: relative;
            z-index: 2;
        }

        .cta-banner h2 {
            font-size: 36px;
            font-weight: 800;
            margin-bottom: 16px;
            letter-spacing: -0.02em;
        }

        .cta-banner p {
            max-width: 540px;
            margin: 0 auto 32px;
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.75;
        }

        /* Footer */
        .site-footer {
            background: #101014;
            border-top: 1px solid var(--border);
            padding: 60px 0 0;
        }

        .footer-brand-title {
            font-size: 22px;
            font-weight: 800;
            color: var(--text-main);
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }

        .footer-brand-title i {
            color: var(--brand);
            font-size: 18px;
        }

        .footer-brand-text {
            font-size: 14px;
            line-height: 1.75;
            color: var(--text-secondary);
            max-width: 320px;
        }

        .footer-title {
            font-size: 15px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 16px;
            letter-spacing: 0.02em;
        }

        .footer-links {
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

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

        .footer-links a:hover {
            color: var(--brand);
            transform: translateX(4px);
        }

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

        .footer-contact i {
            color: var(--brand);
            font-size: 13px;
            width: 16px;
            text-align: center;
        }

        .footer-bottom {
            margin-top: 48px;
            padding: 20px 0;
            border-top: 1px solid var(--border);
            font-size: 12px;
            color: var(--text-weak);
            text-align: center;
        }

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

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

        /* Convert Bar */
        .convert-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            height: 72px;
            background: rgba(14, 14, 18, 0.85);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-top: 1px solid var(--border);
            z-index: 999;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 0 24px;
        }

        .convert-bar-inner {
            max-width: var(--container-w);
            width: 100%;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }

        .convert-bar-text {
            font-size: 15px;
            font-weight: 500;
            color: var(--text-main);
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        .convert-bar-text i {
            color: var(--brand);
            margin-right: 6px;
        }

        .footer-spacer {
            height: 72px;
        }

        /* Reveal */
        .reveal {
            opacity: 0;
            transform: translateY(24px);
            transition: opacity 0.7s ease-out, transform 0.7s ease-out;
        }

        .reveal.in-view {
            opacity: 1;
            transform: translateY(0);
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .category-hero h1 {
                font-size: 44px;
            }
            .section {
                padding: 80px 0;
            }
            .nav-link {
                min-width: 88px;
                padding: 0 12px;
                font-size: 13px;
            }
            .nav-link i {
                margin-right: 4px;
            }
        }

        @media (max-width: 900px) {
            .nav-panel {
                position: relative;
                height: auto;
                min-height: 80px;
                flex-wrap: wrap;
            }
            .nav-toggle {
                display: inline-flex;
            }
            .nav-links {
                display: none;
                position: absolute;
                top: calc(100% + 8px);
                left: 0;
                right: 0;
                flex-direction: column;
                background: var(--card-bg);
                border: 1px solid var(--border);
                border-radius: var(--radius-card);
                padding: 16px;
                gap: 8px;
                box-shadow: var(--shadow-hover);
            }
            .nav-links.open {
                display: flex;
            }
            .nav-link {
                width: 100%;
                min-width: 0;
                justify-content: flex-start;
                height: 48px;
            }
            .nav-cta {
                margin-left: 0;
                width: 100%;
                margin-top: 4px;
            }
            .category-hero {
                padding: 140px 0 70px;
            }
            .category-hero h1 {
                font-size: 38px;
            }
            .stat-item+.stat-item::before {
                display: none;
            }
            .stat-item {
                padding: 20px 16px;
            }
        }

        @media (max-width: 640px) {
            .site-nav-wrap {
                top: 16px;
                padding: 0 16px;
            }
            .nav-panel {
                padding: 0 12px 0 16px;
            }
            .nav-brand {
                font-size: 19px;
            }
            .nav-brand i {
                font-size: 16px;
            }
            .category-hero {
                padding: 130px 0 56px;
            }
            .category-hero h1 {
                font-size: 32px;
            }
            .category-hero .lead {
                font-size: 15px;
            }
            .category-hero-actions .btn {
                width: 100%;
            }
            .section {
                padding: 64px 0;
            }
            .section-head h2 {
                font-size: 28px;
            }
            .section-head p {
                font-size: 14px;
            }
            .filter-panel {
                padding: 16px;
                gap: 8px;
            }
            .filter-chip {
                height: 38px;
                padding: 0 16px;
                font-size: 13px;
            }
            .video-card-body {
                padding: 20px;
            }
            .video-card-body h3 {
                font-size: 17px;
            }
            .stat-number {
                font-size: 36px;
            }
            .step-item {
                padding: 24px;
            }
            .faq-question {
                font-size: 15px;
                padding: 20px 0;
            }
            .faq-answer-inner {
                font-size: 14px;
            }
            .cta-banner {
                padding: 60px 24px;
                border-radius: 16px;
            }
            .cta-banner h2 {
                font-size: 28px;
            }
            .cta-banner p {
                font-size: 14px;
            }
            .convert-bar {
                height: 64px;
            }
            .convert-bar-text {
                font-size: 13px;
                max-width: 180px;
            }
            .convert-bar .btn {
                height: 40px;
                padding: 0 18px;
                font-size: 13px;
            }
            .footer-spacer {
                height: 64px;
            }
            .footer-bottom {
                font-size: 11px;
            }
            .pagination-wrap {
                gap: 6px;
            }
            .page-link {
                min-width: 38px;
                height: 38px;
                font-size: 13px;
            }
        }

        @media (prefers-reduced-motion: reduce) {
            html {
                scroll-behavior: auto;
            }
            *,
            *::before,
            *::after {
                transition-duration: 0.01ms !important;
                animation-duration: 0.01ms !important;
            }
            .reveal {
                opacity: 1;
                transform: none;
            }
        }