/* roulang page: index */
:root {
  --bg: #F6F5F2;
  --surface: #FFFFFF;
  --ink: #15161A;
  --sub: #5C5F66;
  --line: #E5E3DE;
  --primary: #C9A227;
  --primary-strong: #A8881C;
  --primary-tint: #F5EFDD;
  --accent: #10B0A0;
  --accent-dark: #0C8D80;
  --accent-tint: #E6F5F2;
  --darkbg: #121316;
  --danger: #C94B3B;
  --font-stack: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --radius: 12px;
  --radius-btn: 8px;
  --shadow-card: 0 1px 2px rgba(21,22,26,.04);
  --shadow-hover: 0 12px 32px rgba(21,22,26,.10);
  --shadow-pop: 0 24px 64px rgba(21,22,26,.16);
  --container: 1280px;
  --transition: all .25s ease;
}
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: var(--font-stack);
  background-color: var(--bg);
  color: var(--ink);
  line-height: 1.7;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
  padding-bottom: calc(56px + env(safe-area-inset-bottom));
}
img {
  max-width: 100%;
  display: block;
}
a {
  color: var(--accent-dark);
  text-decoration: none;
  transition: var(--transition);
}
a:hover {
  color: var(--primary-strong);
}
ul, ol {
  list-style: none;
}
button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}
input {
  font-family: inherit;
}
:focus-visible {
  outline: 2px dotted var(--accent);
  outline-offset: 4px;
}
.container {
  max-width: var(--container);
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  padding: 0 28px;
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 600;
  text-align: center;
  transition: var(--transition);
  white-space: nowrap;
}
.btn-primary {
  background-color: var(--primary);
  color: #fff;
}
.btn-primary:hover {
  background-color: var(--primary-strong);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: var(--shadow-hover);
}
.btn-primary:active {
  transform: translateY(0);
  box-shadow: var(--shadow-card);
}
.btn-outline {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--ink);
}
.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent-dark);
}
.btn-light {
  background-color: #fff;
  color: var(--ink);
  height: 56px;
  padding: 0 40px;
  border-radius: 32px;
  font-size: 16px;
  box-shadow: var(--shadow-hover);
}
.btn-light:hover {
  background-color: var(--primary-tint);
  color: var(--primary-strong);
  transform: translateY(-1px);
}
.tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 12px;
  font-weight: 500;
  background-color: var(--primary-tint);
  color: var(--primary-strong);
}
.section {
  padding: 60px 0;
}
.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 32px;
}
.section-title {
  font-size: 28px;
  font-weight: 700;
  line-height: 1.3;
  letter-spacing: -0.5px;
}
.section-sub {
  color: var(--sub);
  font-size: 14px;
  margin-top: 8px;
  max-width: 520px;
  line-height: 1.6;
}
.link-more {
  font-size: 13px;
  font-weight: 600;
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-thickness: 2px;
  color: var(--accent-dark);
}
.link-more:hover {
  color: var(--primary);
}

/* Header */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: transparent;
  transition: var(--transition);
}
.site-header.scrolled {
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 4px 20px rgba(21,22,26,.04);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -0.3px;
}
.logo-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-weight: 800;
  font-size: 18px;
  flex-shrink: 0;
}
.logo:hover {
  color: var(--ink);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}
.nav-links a {
  font-size: 15px;
  font-weight: 500;
  color: var(--ink);
  position: relative;
  padding-bottom: 4px;
}
.nav-links a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--primary));
  border-radius: 2px;
  transition: var(--transition);
}
.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}
.nav-links a.active {
  color: var(--accent-dark);
  font-weight: 600;
}
.nav-cta {
  display: flex;
  align-items: center;
  gap: 16px;
}
.nav-login {
  height: 40px;
  padding: 0 22px;
  font-size: 14px;
}
.header-burger {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: 8px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  background: var(--surface);
}
.header-burger svg {
  width: 20px;
  height: 20px;
  stroke: var(--ink);
}
.mobile-menu {
  display: none;
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  box-shadow: var(--shadow-pop);
  padding: 16px 24px;
  z-index: 99;
}
.mobile-menu.open {
  display: block;
}
.mobile-menu a {
  display: block;
  padding: 14px 0;
  font-size: 16px;
  font-weight: 500;
  color: var(--ink);
  border-bottom: 1px solid var(--line);
}
.mobile-menu a:last-child {
  border-bottom: none;
}
.mobile-menu a.active {
  color: var(--accent-dark);
}

/* Hero */
.hero {
  position: relative;
  min-height: 720px;
  display: flex;
  align-items: center;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  overflow: hidden;
  padding-top: 120px;
  padding-bottom: 80px;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,.45);
}
.hero .container {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 60px;
  width: 100%;
}
.hero-content {
  flex: 0 0 55%;
  max-width: 620px;
  color: #fff;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,.15);
  border: 1px solid rgba(255,255,255,.25);
  border-radius: 999px;
  padding: 6px 16px;
  font-size: 13px;
  color: #fff;
  margin-bottom: 24px;
  backdrop-filter: blur(4px);
}
.hero-badge .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
}
.hero h1 {
  font-size: 48px;
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -1px;
  margin-bottom: 20px;
}
.hero-sub {
  font-size: 17px;
  line-height: 1.7;
  color: rgba(255,255,255,.85);
  margin-bottom: 36px;
  max-width: 480px;
}
.hero-buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.hero-buttons .btn-primary {
  background-color: var(--primary);
}
.hero-buttons .btn-primary:hover {
  background-color: var(--primary-strong);
}
.hero-buttons .btn-outline {
  border-color: rgba(255,255,255,.4);
  color: #fff;
}
.hero-buttons .btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
}
.hero-phone {
  flex: 0 0 320px;
  height: 480px;
  border-radius: 24px;
  background: linear-gradient(135deg, #EDEAE4, #D9D5CC);
  overflow: hidden;
  box-shadow: 0 24px 64px rgba(0,0,0,.3);
  position: relative;
  margin-left: auto;
}
.hero-phone img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.hero-phone::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: 24px;
  border: 1px solid rgba(255,255,255,.2);
  pointer-events: none;
}
.scroll-indicator {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  color: rgba(255,255,255,.6);
  font-size: 12px;
  animation: bounce 2s infinite;
}
.scroll-indicator svg {
  width: 20px;
  height: 20px;
}
@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(6px); }
}

/* Featured */
.featured {
  padding: 60px 0 20px;
}
.featured-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  align-items: start;
}
.featured-card {
  background: var(--surface);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-card);
  transition: var(--transition);
}
.featured-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}
.featured-card.middle {
  margin-top: 24px;
}
.featured-card:nth-child(2) {
  margin-top: 24px;
}
.featured-cover {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: linear-gradient(135deg, #EDEAE4, #D9D5CC);
}
.featured-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .3s ease;
}
.featured-card:hover .featured-cover img {
  transform: scale(1.03);
}
.featured-cover::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0);
  transition: var(--transition);
}
.featured-card:hover .featured-cover::after {
  background: rgba(0,0,0,.2);
}
.badge-time {
  position: absolute;
  top: 10px;
  right: 10px;
  background: rgba(0,0,0,.7);
  color: #fff;
  font-size: 12px;
  padding: 3px 8px;
  border-radius: 6px;
  z-index: 2;
  backdrop-filter: blur(4px);
  font-variant-numeric: tabular-nums;
}
.badge-hot {
  position: absolute;
  bottom: 10px;
  left: 10px;
  background: rgba(0,0,0,.7);
  color: #fff;
  font-size: 12px;
  padding: 3px 8px;
  border-radius: 6px;
  display: flex;
  align-items: center;
  gap: 4px;
  z-index: 2;
  backdrop-filter: blur(4px);
}
.badge-hot svg {
  width: 12px;
  height: 12px;
  fill: #FF6B35;
}
.play-icon {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(255,255,255,.9);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: var(--transition);
  z-index: 2;
}
.featured-card:hover .play-icon {
  opacity: 1;
}
.play-icon svg {
  width: 18px;
  height: 18px;
  fill: var(--ink);
  margin-left: 2px;
}
.featured-info {
  padding: 16px 20px 20px;
}
.featured-info h3 {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 6px;
}
.featured-meta {
  font-size: 13px;
  color: var(--sub);
  display: flex;
  align-items: center;
  gap: 12px;
}

/* Showcase */
.showcase {
  padding: 60px 0;
}
.showcase-list {
  margin-top: 24px;
}
.showcase-item {
  display: flex;
  align-items: center;
  gap: 24px;
  padding: 18px 20px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  transition: var(--transition);
  min-height: 72px;
}
.showcase-item:hover {
  background-color: #F1F0EC;
}
.showcase-item.active {
  background-color: var(--accent-tint);
  border-left: 3px solid var(--accent);
  padding-left: 17px;
}
.showcase-num {
  font-size: 28px;
  font-weight: 700;
  color: var(--line);
  font-family: "Georgia", "Times New Roman", serif;
  min-width: 48px;
  text-align: center;
}
.showcase-item:hover .showcase-num,
.showcase-item.active .showcase-num {
  color: var(--primary);
}
.showcase-info {
  flex: 1;
}
.showcase-info h3 {
  font-size: 18px;
  font-weight: 600;
  line-height: 1.4;
}
.showcase-info p {
  font-size: 13px;
  color: var(--sub);
  margin-top: 2px;
}
.showcase-add {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border: 1px solid var(--line);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  color: var(--ink);
  transition: var(--transition);
  background: var(--surface);
}
.showcase-add:hover {
  border-color: var(--accent);
  color: var(--accent-dark);
}
.showcase-add svg {
  width: 14px;
  height: 14px;
}

/* Testimonials */
.testimonials {
  padding: 60px 0;
}
.testi-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.testi-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow-card);
  transition: var(--transition);
}
.testi-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}
.testi-top {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}
.testi-avatar {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  flex-shrink: 0;
}
.testi-name {
  font-size: 14px;
  font-weight: 600;
}
.stars {
  display: flex;
  gap: 2px;
  margin-top: 2px;
}
.stars svg {
  width: 14px;
  height: 14px;
  fill: var(--primary);
}
.stars svg.half {
  opacity: .5;
}
.testi-text {
  font-size: 14px;
  line-height: 1.65;
  color: var(--sub);
  margin-top: 8px;
}
.testi-text::before {
  content: '「';
  color: var(--primary);
  font-weight: 600;
}
.testi-text::after {
  content: '」';
  color: var(--primary);
  font-weight: 600;
}

/* CTA */
.cta-block {
  padding: 60px 0;
}
.cta-inner {
  position: relative;
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  border-radius: 24px;
  padding: 60px 40px;
  text-align: center;
  overflow: hidden;
}
.cta-inner::before {
  content: '';
  position: absolute;
  top: -40px;
  right: -40px;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: rgba(255,255,255,.08);
}
.cta-inner::after {
  content: '';
  position: absolute;
  bottom: -60px;
  left: -60px;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: rgba(255,255,255,.06);
}
.cta-badge {
  display: inline-block;
  background: rgba(255,255,255,.2);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: 6px 18px;
  border-radius: 999px;
  margin-bottom: 24px;
  backdrop-filter: blur(4px);
  border: 1px solid rgba(255,255,255,.3);
}
.cta-inner h2 {
  font-size: 32px;
  font-weight: 700;
  color: #fff;
  line-height: 1.3;
  margin-bottom: 16px;
  position: relative;
  z-index: 2;
}
.cta-inner p {
  color: rgba(255,255,255,.9);
  font-size: 15px;
  margin-bottom: 32px;
  position: relative;
  z-index: 2;
}
.cta-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 32px;
  position: relative;
  z-index: 2;
}
.cta-note {
  font-size: 12px;
  color: rgba(255,255,255,.85);
  display: flex;
  align-items: center;
  gap: 6px;
}
.cta-note::before {
  content: '✓';
  display: inline-flex;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: rgba(255,255,255,.2);
  align-items: center;
  justify-content: center;
  font-size: 10px;
}

/* News */
.news {
  padding: 60px 0;
}
.news-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.news-card {
  display: flex;
  gap: 20px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 16px;
  transition: var(--transition);
  box-shadow: var(--shadow-card);
}
.news-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}
.news-thumb {
  width: 200px;
  min-width: 200px;
  aspect-ratio: 4 / 3;
  border-radius: 8px;
  overflow: hidden;
  background: linear-gradient(135deg, #EDEAE4, #D9D5CC);
}
.news-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .3s ease;
}
.news-card:hover .news-thumb img {
  transform: scale(1.03);
}
.news-content {
  flex: 1;
  display: flex;
  flex-direction: column;
}
.news-content h3 {
  font-size: 17px;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 8px;
  color: var(--ink);
  transition: var(--transition);
}
.news-card:hover .news-content h3 {
  color: var(--accent-dark);
}
.news-summary {
  font-size: 14px;
  color: var(--sub);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 12px;
  flex: 1;
}
.news-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 13px;
  color: var(--sub);
}
.read-more {
  margin-left: auto;
  font-weight: 500;
  color: var(--accent-dark);
}
.read-more:hover {
  color: var(--primary);
}
.news-empty {
  border: 2px dashed var(--line);
  border-radius: 16px;
  padding: 60px 24px;
  text-align: center;
}
.empty-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--primary-tint);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  color: var(--primary);
}
.empty-icon svg {
  width: 28px;
  height: 28px;
}
.news-empty p {
  color: var(--sub);
  font-size: 14px;
  margin-bottom: 20px;
}

/* FAQ */
.faq {
  padding: 60px 0;
}
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}
.faq-item {
  border-bottom: 1px solid var(--line);
}
.faq-item:first-child {
  border-top: 1px solid var(--line);
}
.faq-q {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 20px 0;
  cursor: pointer;
  user-select: none;
}
.faq-badge {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--primary-tint);
  color: var(--primary-strong);
  font-size: 12px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.faq-question-text {
  font-size: 16px;
  font-weight: 600;
  flex: 1;
  line-height: 1.4;
}
.faq-toggle {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: var(--surface);
  border: 1px solid var(--line);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: var(--sub);
  transition: var(--transition);
  flex-shrink: 0;
}
.faq-item.active .faq-toggle {
  transform: rotate(45deg);
  color: var(--accent);
  border-color: var(--accent);
}
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height .3s ease;
}
.faq-a-inner {
  padding: 0 0 20px 36px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--sub);
}

/* Footer */
.site-footer {
  background-color: var(--darkbg);
  color: #9C9FA5;
  padding: 64px 24px 32px;
}
.footer-grid {
  max-width: var(--container);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.2fr;
  gap: 48px;
}
.footer-brand {
  font-size: 22px;
  font-weight: 700;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}
.footer-brand .logo-icon {
  background: linear-gradient(135deg, var(--primary), var(--accent));
}
.footer-desc {
  font-size: 14px;
  line-height: 1.7;
  color: #9C9FA5;
  max-width: 260px;
}
.footer-col h4 {
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 20px;
}
.footer-col ul li {
  margin-bottom: 10px;
}
.footer-col ul li a {
  color: #9C9FA5;
  font-size: 14px;
}
.footer-col ul li a:hover {
  color: #fff;
  text-decoration: underline;
  text-underline-offset: 4px;
}
.footer-contact li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 14px;
  line-height: 1.6;
}
.footer-bottom {
  max-width: var(--container);
  margin: 0 auto;
  border-top: 1px solid rgba(255,255,255,.1);
  padding-top: 24px;
  margin-top: 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: #6C6F76;
}

/* Bottom Tab */
.bottom-tab {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: calc(56px + env(safe-area-inset-bottom));
  padding-bottom: env(safe-area-inset-bottom);
  background: rgba(255,255,255,.95);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid var(--line);
  z-index: 100;
}
.bottom-tab-inner {
  display: flex;
  align-items: center;
  height: 56px;
  max-width: 480px;
  margin: 0 auto;
}
.tab-item {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  color: #8C8F96;
  font-size: 12px;
  transition: var(--transition);
  position: relative;
  height: 100%;
}
.tab-item svg {
  width: 20px;
  height: 20px;
  stroke: currentColor;
  fill: none;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}
.tab-item.active {
  color: var(--accent);
}
.tab-item.active::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--accent);
}
.tab-item.about {
  display: flex;
}

/* Responsive */
@media (max-width: 1023px) {
  .nav-links {
    display: none;
  }
  .nav-cta .btn {
    display: none;
  }
  .header-burger {
    display: flex;
  }
  .hero {
    min-height: 100vh;
    padding-top: 100px;
  }
  .hero .container {
    flex-direction: column;
    gap: 40px;
  }
  .hero-content {
    flex: 0 0 auto;
    max-width: 100%;
  }
  .hero-phone {
    flex: 0 0 auto;
    width: 280px;
    height: 420px;
    margin: 0 auto;
  }
  .featured-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .featured-card:nth-child(2) {
    margin-top: 0;
  }
  .featured-card:nth-child(4) {
    margin-top: 24px;
  }
  .testi-grid {
    display: flex;
    overflow-x: auto;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 16px;
  }
  .testi-card {
    flex: 0 0 280px;
    scroll-snap-align: start;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  .bottom-tab {
    display: block;
  }
}
@media (max-width: 767px) {
  body {
    font-size: 14px;
  }
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }
  .section {
    padding: 40px 0;
  }
  .section-title {
    font-size: 24px;
  }
  .section-head {
    margin-bottom: 20px;
  }
  .hero h1 {
    font-size: 32px;
    line-height: 1.25;
  }
  .hero-sub {
    font-size: 15px;
  }
  .hero-buttons .btn {
    width: 100%;
  }
  .hero-phone {
    width: 240px;
    height: 360px;
    border-radius: 18px;
  }
  .featured-grid {
    grid-template-columns: 1fr;
  }
  .featured-card:nth-child(4) {
    margin-top: 0;
  }
  .featured-card.middle {
    margin-top: 0;
  }
  .showcase-item {
    gap: 12px;
    padding: 14px 12px;
  }
  .showcase-num {
    font-size: 22px;
    min-width: 36px;
  }
  .showcase-info h3 {
    font-size: 16px;
  }
  .showcase-add {
    padding: 6px 12px;
    font-size: 12px;
  }
  .cta-inner {
    padding: 40px 20px;
    border-radius: 16px;
  }
  .cta-inner h2 {
    font-size: 24px;
  }
  .cta-actions {
    flex-direction: column;
    gap: 16px;
  }
  .news-card {
    flex-direction: column;
    padding: 12px;
  }
  .news-thumb {
    width: 100%;
    aspect-ratio: 16 / 9;
  }
  .news-meta {
    flex-wrap: wrap;
    gap: 8px;
  }
  .read-more {
    margin-left: 0;
  }
  .faq-q {
    padding: 16px 0;
  }
  .faq-question-text {
    font-size: 15px;
  }
  .faq-a-inner {
    padding-left: 30px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}
@media (max-width: 520px) {
  .hero {
    min-height: 100vh;
    padding-top: 90px;
  }
  .hero h1 {
    font-size: 28px;
  }
  .hero-phone {
    width: 200px;
    height: 300px;
  }
}

/* roulang page: category1 */
:root {
  --bg: #F6F5F2;
  --surface: #FFFFFF;
  --ink: #15161A;
  --sub: #5C5F66;
  --line: #E5E3DE;
  --primary: #C9A227;
  --primary-strong: #A8881C;
  --primary-tint: #F5EFDD;
  --accent: #10B0A0;
  --accent-dark: #0C8D80;
  --accent-tint: #E6F5F2;
  --darkbg: #121316;
  --danger: #C94B3B;
  --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --radius-card: 12px;
  --radius-btn: 8px;
  --radius-pill: 999px;
  --shadow-card: 0 1px 2px rgba(21,22,26,.04);
  --shadow-hover: 0 12px 32px rgba(21,22,26,.10);
  --transition: all .25s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-size: 16px;
  line-height: 1.75;
  color: var(--ink);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

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

a:hover {
  color: var(--primary-strong);
}

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

button {
  font-family: var(--font-family);
  cursor: pointer;
  border: none;
  background: none;
}

input, select, textarea {
  font-family: var(--font-family);
}

:focus-visible {
  outline: 2px dotted var(--accent);
  outline-offset: 4px;
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding-left: 24px;
  padding-right: 24px;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  font-size: 13px;
  font-weight: 600;
  background: var(--primary-tint);
  color: var(--primary-strong);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  padding: 0 28px;
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 600;
  transition: var(--transition);
  white-space: nowrap;
}

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

.btn-primary:hover {
  background: var(--primary-strong);
  color: #fff;
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 2px 8px rgba(169, 136, 28, .35);
}

.btn-outline {
  background: transparent;
  border: 1px solid rgba(255,255,255,.4);
  color: #fff;
}

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.btn-light {
  background: #fff;
  color: var(--ink);
  height: 56px;
  padding: 0 36px;
  border-radius: 32px;
  font-weight: 700;
  box-shadow: 0 4px 20px rgba(0,0,0,.12);
}

.btn-light:hover {
  background: var(--primary-tint);
  color: var(--primary-strong);
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(0,0,0,.15);
}

/* ===== Header ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  background: rgba(246,245,242,.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid transparent;
  transition: var(--transition);
}

.site-header.scrolled {
  background: rgba(255,255,255,.92);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 2px 16px rgba(21,22,26,.04);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 700;
  color: var(--ink);
  text-decoration: none;
}

.logo:hover {
  color: var(--ink);
}

.logo-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  border-radius: 8px;
  background: linear-gradient(135deg, var(--primary), var(--primary-strong));
  color: #fff;
  font-size: 18px;
  font-weight: 800;
  flex-shrink: 0;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-links a {
  position: relative;
  padding: 8px 14px;
  font-size: 15px;
  font-weight: 500;
  color: var(--sub);
  border-radius: 6px;
}

.nav-links a:hover {
  color: var(--ink);
  background: var(--primary-tint);
}

.nav-links a.active {
  color: var(--ink);
  font-weight: 600;
}

.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: 2px;
  left: 14px;
  right: 14px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--accent), var(--primary));
}

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

.nav-login {
  height: 40px;
  padding: 0 20px;
  font-size: 14px;
}

.header-burger {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  color: var(--ink);
}

.header-burger:hover {
  background: var(--primary-tint);
}

.header-burger svg {
  width: 22px;
  height: 22px;
}

/* Mobile Menu Drawer */
.mobile-menu {
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  z-index: 999;
  background: var(--surface);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 16px 32px rgba(21,22,26,.08);
  padding: 16px 24px;
  display: none;
  flex-direction: column;
  gap: 4px;
}

.mobile-menu.open {
  display: flex;
}

.mobile-menu a {
  padding: 14px 16px;
  font-size: 16px;
  font-weight: 500;
  color: var(--ink);
  border-radius: 8px;
}

.mobile-menu a:hover {
  background: var(--primary-tint);
}

.mobile-menu a.active {
  background: var(--primary-tint);
  color: var(--primary-strong);
  font-weight: 600;
}

/* ===== Hero ===== */
.cat-hero {
  position: relative;
  padding: 140px 0 90px;
  background: linear-gradient(135deg, #0D0E12 0%, #1A1C22 50%, #14151A 100%);
  overflow: hidden;
}

.cat-hero::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  opacity: .35;
}

.cat-hero::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: linear-gradient(180deg, rgba(21,22,26,.55) 0%, rgba(21,22,26,.35) 50%, rgba(21,22,26,.65) 100%);
}

.cat-hero-content {
  position: relative;
  z-index: 2;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

.cat-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 18px;
  border-radius: var(--radius-pill);
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  background: rgba(201,162,39,.12);
  border: 1px solid rgba(201,162,39,.3);
  letter-spacing: .5px;
}

.cat-hero h1 {
  font-size: 46px;
  font-weight: 700;
  line-height: 1.2;
  color: #fff;
  margin-top: 20px;
  letter-spacing: 1px;
}

.cat-hero-sub {
  font-size: 17px;
  line-height: 1.8;
  color: rgba(255,255,255,.75);
  margin-top: 14px;
  max-width: 640px;
}

.cat-hero-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 32px;
}

.cat-hero-info {
  display: flex;
  align-items: center;
  gap: 28px;
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,.12);
}

.cat-hero-info-item {
  display: flex;
  flex-direction: column;
}

.cat-hero-info-num {
  font-size: 26px;
  font-weight: 700;
  color: #fff;
  line-height: 1.2;
}

.cat-hero-info-label {
  font-size: 13px;
  color: rgba(255,255,255,.5);
  margin-top: 2px;
}

/* ===== Section common ===== */
.section {
  padding: 72px 0;
}

.section-label {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1px;
  color: var(--primary-strong);
  text-transform: uppercase;
  margin-bottom: 8px;
}

.section-title {
  font-size: 28px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--ink);
}

.section-desc {
  font-size: 15px;
  color: var(--sub);
  line-height: 1.8;
  margin-top: 8px;
  max-width: 660px;
}

/* ===== Image Text Blocks ===== */
.img-text-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.img-text-block {
  padding: 72px 0;
}

.img-text-block:nth-child(odd) {
  background: var(--surface);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.img-text-media {
  position: relative;
  border-radius: var(--radius-card);
  overflow: hidden;
  height: 400px;
  box-shadow: var(--shadow-card);
}

.img-text-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}

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

.img-text-media::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(21,22,26,.25), transparent 60%);
  pointer-events: none;
}

.img-text-tag {
  position: absolute;
  top: 16px;
  left: 16px;
  z-index: 2;
  padding: 4px 14px;
  border-radius: var(--radius-pill);
  font-size: 12px;
  font-weight: 600;
  color: #fff;
  background: rgba(21,22,26,.55);
  backdrop-filter: blur(8px);
}

.img-text-content {
  padding: 16px 0;
}

.img-text-content .section-title {
  font-size: 26px;
}

.img-text-content p {
  margin-top: 14px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--sub);
}

.img-text-list {
  list-style: none;
  margin-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.img-text-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 15px;
  color: var(--ink);
  padding: 12px 16px;
  background: var(--bg);
  border-radius: 10px;
  border: 1px solid var(--line);
}

.img-text-list li::before {
  content: '';
  flex-shrink: 0;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  margin-top: 8px;
}

/* ===== Features ===== */
.features-section {
  background: var(--bg);
  padding: 72px 0;
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 40px;
}

.feature-card {
  background: var(--surface);
  border-radius: var(--radius-card);
  padding: 28px;
  border: 1px solid var(--line);
  box-shadow: var(--shadow-card);
  transition: var(--transition);
}

.feature-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
  border-color: rgba(201,162,39,.3);
}

.feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 52px;
  height: 52px;
  border-radius: 12px;
  font-size: 24px;
  margin-bottom: 16px;
}

.feature-icon.gold {
  background: var(--primary-tint);
}

.feature-icon.green {
  background: var(--accent-tint);
}

.feature-icon.dark {
  background: #ECEBE8;
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 10px;
  color: var(--ink);
}

.feature-card p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--sub);
}

/* ===== Scenarios ===== */
.scenarios-section {
  padding: 72px 0;
  background: var(--surface);
}

.scenarios-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
  margin-top: 40px;
}

.scenario-card {
  display: flex;
  gap: 16px;
  padding: 24px;
  background: var(--bg);
  border-radius: var(--radius-card);
  border: 1px solid var(--line);
  transition: var(--transition);
}

.scenario-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-hover);
}

.scenario-num {
  flex-shrink: 0;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 700;
  font-family: "Inter", "Roboto", sans-serif;
  color: var(--primary);
  background: var(--primary-tint);
  border-radius: 10px;
}

.scenario-content h3 {
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 6px;
}

.scenario-content p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--sub);
}

/* ===== Steps ===== */
.steps-section {
  padding: 72px 0;
  background: var(--darkbg);
  position: relative;
  overflow: hidden;
}

.steps-section::before {
  content: '01';
  position: absolute;
  right: -20px;
  bottom: -40px;
  font-size: 160px;
  font-weight: 800;
  font-family: "Inter", "Roboto", sans-serif;
  color: rgba(255,255,255,.04);
  pointer-events: none;
}

.steps-section .section-title {
  color: #fff;
}

.steps-section .section-desc {
  color: rgba(255,255,255,.6);
}

.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 40px;
}

.step-card {
  position: relative;
  padding: 32px 24px;
  background: rgba(255,255,255,.04);
  border: 1px solid rgba(255,255,255,.08);
  border-radius: 16px;
  transition: var(--transition);
}

.step-card:hover {
  background: rgba(255,255,255,.08);
  border-color: rgba(201,162,39,.3);
  transform: translateY(-3px);
}

.step-no {
  font-size: 32px;
  font-weight: 800;
  font-family: "Inter", "Roboto", sans-serif;
  color: var(--primary);
  opacity: .8;
  line-height: 1;
}

.step-title {
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  margin-top: 14px;
}

.step-desc {
  font-size: 13px;
  line-height: 1.7;
  color: rgba(255,255,255,.55);
  margin-top: 6px;
}

/* ===== Sub Category Cards ===== */
.subcat-section {
  padding: 72px 0;
  background: var(--bg);
}

.subcat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 40px;
}

.subcat-card {
  position: relative;
  border-radius: var(--radius-card);
  overflow: hidden;
  height: 220px;
  box-shadow: var(--shadow-card);
  transition: var(--transition);
  cursor: pointer;
}

.subcat-card:nth-child(2) {
  transform: translateY(20px);
}

.subcat-card:nth-child(4) {
  transform: translateY(12px);
}

.subcat-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px) scale(1.02);
}

.subcat-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}

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

.subcat-card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(21,22,26,.85) 0%, rgba(21,22,26,.15) 60%, transparent 100%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 20px;
}

.subcat-card-overlay h3 {
  font-size: 18px;
  font-weight: 600;
  color: #fff;
}

.subcat-card-overlay p {
  font-size: 13px;
  color: rgba(255,255,255,.7);
  margin-top: 4px;
}

.subcat-card-overlay .btn-link {
  margin-top: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* ===== FAQ ===== */
.faq-section {
  padding: 72px 0;
  background: var(--surface);
}

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

.faq-title {
  text-align: center;
  margin-bottom: 40px;
}

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

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

.faq-question {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 22px 8px;
  cursor: pointer;
  user-select: none;
}

.faq-q-icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  color: var(--primary-strong);
  background: var(--primary-tint);
}

.faq-question span {
  flex: 1;
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
}

.faq-toggle {
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  font-size: 20px;
  color: var(--sub);
  transition: var(--transition);
  background: var(--bg);
}

.faq-item.active .faq-toggle {
  transform: rotate(45deg);
  color: var(--accent);
  background: var(--accent-tint);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height .3s ease;
}

.faq-answer-inner {
  padding: 0 8px 20px 50px;
  font-size: 15px;
  line-height: 1.8;
  color: var(--sub);
}

.faq-item.active .faq-answer {
  max-height: 300px;
}

/* ===== CTA ===== */
.cta-section {
  padding: 72px 0;
  position: relative;
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  top: -60px;
  right: -60px;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: rgba(255,255,255,.08);
}

.cta-section::after {
  content: '';
  position: absolute;
  bottom: -80px;
  left: -40px;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: rgba(0,0,0,.06);
}

.cta-inner {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 700px;
  margin: 0 auto;
}

.cta-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 16px;
  border-radius: var(--radius-pill);
  background: rgba(255,255,255,.18);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1px;
}

.cta-inner h2 {
  font-size: 30px;
  font-weight: 700;
  color: #fff;
  margin-top: 16px;
}

.cta-inner p {
  font-size: 15px;
  color: rgba(255,255,255,.85);
  margin-top: 10px;
  line-height: 1.8;
}

.cta-buttons {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-top: 28px;
}

.cta-note {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-top: 20px;
  font-size: 12px;
  color: rgba(255,255,255,.7);
}

.cta-note span {
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

/* ===== Footer ===== */
.site-footer {
  background: var(--darkbg);
  padding: 64px 24px 32px;
}

.footer-grid {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 48px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  color: #fff;
}

.footer-desc {
  font-size: 14px;
  line-height: 1.8;
  color: #9C9FA5;
  margin-top: 16px;
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 16px;
}

.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-col ul a {
  font-size: 14px;
  color: #9C9FA5;
  transition: var(--transition);
}

.footer-col ul a:hover {
  color: #fff;
  text-decoration: underline;
}

.footer-contact li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: #9C9FA5;
}

.footer-bottom {
  max-width: 1280px;
  margin: 48px auto 0;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,.08);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: #666;
}

/* ===== Mobile Bottom Tab ===== */
.mobile-tab-bar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  height: 56px;
  background: rgba(255,255,255,.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid var(--line);
  z-index: 1000;
  justify-content: space-around;
  align-items: center;
  padding-bottom: env(safe-area-inset-bottom);
}

.mobile-tab-bar a {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
  font-size: 11px;
  color: #8C8F96;
  padding: 4px 8px;
  border-radius: 8px;
  transition: var(--transition);
}

.mobile-tab-bar a svg {
  width: 20px;
  height: 20px;
}

.mobile-tab-bar a.active {
  color: var(--accent-dark);
  position: relative;
}

.mobile-tab-bar a.active::after {
  content: '';
  position: absolute;
  bottom: -2px;
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--accent);
}

.mobile-tab-bar a:hover {
  color: var(--accent-dark);
  background: var(--accent-tint);
}

/* ===== Responsive ===== */
@media (max-width: 1023px) {
  .nav-links {
    display: none;
  }

  .header-burger {
    display: inline-flex;
  }

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

  .img-text-media {
    height: 320px;
  }

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

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

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

  .subcat-card:nth-child(2),
  .subcat-card:nth-child(4) {
    transform: none;
  }

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

@media (max-width: 767px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }

  .section {
    padding: 48px 0;
  }

  .section-title {
    font-size: 24px;
  }

  .cat-hero {
    padding: 120px 0 60px;
  }

  .cat-hero h1 {
    font-size: 34px;
  }

  .cat-hero-sub {
    font-size: 15px;
  }

  .cat-hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

  .cat-hero-actions .btn {
    width: 100%;
  }

  .cat-hero-info {
    flex-wrap: wrap;
    gap: 16px;
  }

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

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

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

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

  .subcat-card {
    height: 180px;
  }

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

  .footer-bottom {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }

  .mobile-tab-bar {
    display: flex;
  }

  body {
    padding-bottom: 70px;
  }

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

  .cta-buttons .btn {
    width: 100%;
  }

  .cta-note {
    flex-direction: column;
    align-items: center;
    gap: 8px;
  }

  .img-text-grid {
    gap: 20px;
  }

  .img-text-media {
    height: 240px;
  }
}

@media (max-width: 520px) {
  .cat-hero h1 {
    font-size: 28px;
  }

  .btn {
    height: 44px;
    font-size: 14px;
    padding: 0 20px;
  }

  .btn-light {
    height: 50px;
    font-size: 15px;
    padding: 0 28px;
  }
}

/* roulang page: article */
:root {
  --bg: #F6F5F2;
  --surface: #FFFFFF;
  --ink: #15161A;
  --sub: #5C5F66;
  --line: #E5E3DE;
  --primary: #C9A227;
  --primary-strong: #A8881C;
  --primary-tint: #F5EFDD;
  --accent: #10B0A0;
  --accent-dark: #0C8D80;
  --accent-tint: #E6F5F2;
  --darkbg: #121316;
  --danger: #C94B3B;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-pill: 999px;
  --shadow-card: 0 1px 2px rgba(21,22,26,.04);
  --shadow-hover: 0 12px 32px rgba(21,22,26,.10);
  --font-main: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-num: "Inter", "Roboto", var(--font-main);
  --transition: all .25s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
}

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

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

a:hover {
  color: var(--primary-strong);
}

ul, ol {
  list-style: none;
}

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

input, textarea {
  font-family: inherit;
}

:focus-visible {
  outline: 2px dotted var(--accent);
  outline-offset: 4px;
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  padding: 0 28px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .02em;
  transition: var(--transition);
  white-space: nowrap;
}

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

.btn-primary:hover {
  background: var(--primary-strong);
  color: #fff;
  transform: translateY(-1px);
}

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

.btn-outline {
  background: transparent;
  border: 1px solid rgba(255,255,255,.4);
  color: #fff;
}

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-1px);
}

.btn-outline-dark {
  background: transparent;
  border: 1px solid var(--line);
  color: var(--ink);
}

.btn-outline-dark:hover {
  border-color: var(--accent);
  color: var(--accent-dark);
  transform: translateY(-1px);
}

/* ===== Header ===== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  transition: var(--transition);
  background: transparent;
  border-bottom: 1px solid transparent;
}

.site-header.scrolled {
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom-color: var(--line);
  box-shadow: 0 4px 24px rgba(21,22,26,.04);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 700;
  color: #fff;
  line-height: 1.2;
  transition: var(--transition);
}

.site-header.scrolled .logo {
  color: var(--ink);
}

.logo:hover {
  color: #fff;
}

.site-header.scrolled .logo:hover {
  color: var(--ink);
}

.logo-icon {
  width: 36px;
  height: 36px;
  background: var(--primary);
  border-radius: 9px;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 700;
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(201,162,39,.3);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 30px;
}

.nav-links a {
  font-size: 15px;
  font-weight: 500;
  color: rgba(255,255,255,.88);
  position: relative;
  padding: 6px 0;
  transition: var(--transition);
}

.site-header.scrolled .nav-links a {
  color: var(--ink);
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--primary));
  border-radius: 2px;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .25s ease;
}

.nav-links a:hover::after,
.nav-links a.active::after {
  transform: scaleX(1);
}

.nav-links a:hover {
  color: #fff;
}

.site-header.scrolled .nav-links a:hover {
  color: var(--primary-strong);
}

.nav-links a.active {
  color: var(--accent);
}

.site-header.scrolled .nav-links a.active {
  color: var(--accent-dark);
}

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

.nav-cta .btn {
  height: 42px;
  padding: 0 22px;
  font-size: 14px;
}

.header-burger {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  color: #fff;
  transition: var(--transition);
}

.site-header.scrolled .header-burger {
  color: var(--ink);
}

/* ===== Article Hero ===== */
.article-hero {
  position: relative;
  background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  padding: 160px 0 72px;
  color: #fff;
}

.article-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0,0,0,.62) 0%, rgba(0,0,0,.42) 60%, rgba(0,0,0,.3) 100%);
}

.article-hero .container {
  position: relative;
  z-index: 2;
  max-width: 1020px;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: rgba(255,255,255,.7);
  margin-bottom: 20px;
}

.breadcrumb a {
  color: rgba(255,255,255,.7);
  transition: var(--transition);
}

.breadcrumb a:hover {
  color: #fff;
}

.breadcrumb .sep {
  color: rgba(255,255,255,.4);
}

.breadcrumb .current {
  color: rgba(255,255,255,.95);
  max-width: 360px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.article-hero h1 {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.35;
  margin-bottom: 20px;
  max-width: 820px;
  letter-spacing: .01em;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: rgba(255,255,255,.72);
}

.article-meta .meta-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.article-meta .meta-dot {
  width: 3px;
  height: 3px;
  background: rgba(255,255,255,.4);
  border-radius: 50%;
}

/* ===== Article Main ===== */
.article-main {
  padding: 48px 0 24px;
}

.article-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 16px;
  box-shadow: var(--shadow-card);
  padding: 48px;
  max-width: 1020px;
  margin: 40px auto 0;
}

.article-body {
  max-width: 720px;
  font-size: 17px;
  line-height: 1.8;
  color: var(--ink);
}

.article-body p {
  margin-bottom: 24px;
}

.article-body p:last-child {
  margin-bottom: 0;
}

.article-body h2 {
  font-size: 24px;
  font-weight: 700;
  margin: 40px 0 16px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
  line-height: 1.4;
}

.article-body h3 {
  font-size: 18px;
  font-weight: 600;
  margin: 28px 0 12px;
  line-height: 1.4;
}

.article-body blockquote {
  border-left: 4px solid var(--primary);
  background: var(--primary-tint);
  padding: 16px 20px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  font-style: italic;
  color: var(--sub);
  margin: 24px 0;
}

.article-body img {
  width: 100%;
  border-radius: var(--radius);
  margin: 24px 0;
}

.article-body figcaption {
  text-align: center;
  font-size: 13px;
  color: var(--sub);
  margin-top: -16px;
  margin-bottom: 24px;
}

.article-body ul,
.article-body ol {
  padding-left: 24px;
  margin: 16px 0 24px;
}

.article-body ul li {
  list-style: disc;
  margin-bottom: 8px;
}

.article-body ol li {
  list-style: decimal;
  margin-bottom: 8px;
}

.article-body code {
  background: var(--darkbg);
  color: #fff;
  padding: 2px 8px;
  border-radius: 6px;
  font-size: 14px;
  font-family: "SFMono-Regular", Consolas, monospace;
}

.article-body .code-block {
  background: var(--darkbg);
  color: rgba(255,255,255,.9);
  border-radius: var(--radius);
  padding: 20px;
  font-size: 14px;
  overflow-x: auto;
  margin: 24px 0;
  line-height: 1.7;
}

.article-body a {
  color: var(--accent-dark);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.article-body a:hover {
  color: var(--primary-strong);
}

/* ===== Not Found ===== */
.not-found {
  text-align: center;
  padding: 80px 24px;
}

.nf-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  color: var(--line);
}

.nf-icon svg {
  width: 28px;
  height: 28px;
}

.not-found p {
  font-size: 17px;
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 12px;
}

.not-found .nf-sub {
  font-size: 14px;
  color: var(--sub);
  font-weight: 400;
  margin-bottom: 32px;
}

/* ===== Article Tags ===== */
.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 36px;
  padding-top: 28px;
  border-top: 1px solid var(--line);
}

.tag {
  display: inline-block;
  padding: 6px 16px;
  background: var(--bg);
  border-radius: var(--radius-pill);
  font-size: 13px;
  font-weight: 500;
  color: var(--sub);
  transition: var(--transition);
}

.tag:hover {
  background: var(--primary-tint);
  color: var(--primary-strong);
}

/* ===== Related Section ===== */
.related-section {
  padding: 64px 0 32px;
}

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 32px;
}

.section-head h2 {
  font-size: 28px;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.text-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--accent-dark);
  text-decoration: underline;
  text-underline-offset: 4px;
  text-decoration-color: rgba(16,176,160,.35);
  transition: var(--transition);
}

.text-link:hover {
  color: var(--primary-strong);
  text-decoration-color: rgba(168,136,28,.4);
}

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

.video-card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
  display: block;
  color: var(--ink);
}

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

.card-cover {
  position: relative;
  aspect-ratio: 16 / 9;
  overflow: hidden;
  background: linear-gradient(135deg, #EDEAE4, #D9D5CC);
}

.card-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .3s ease;
}

.video-card:hover .card-cover img {
  transform: scale(1.03);
}

.card-duration {
  position: absolute;
  top: 12px;
  right: 12px;
  padding: 4px 10px;
  background: rgba(0,0,0,.65);
  color: #fff;
  font-size: 12px;
  border-radius: var(--radius-pill);
  backdrop-filter: blur(4px);
  font-family: var(--font-num);
  letter-spacing: .02em;
}

.card-hot {
  position: absolute;
  left: 12px;
  bottom: 12px;
  padding: 4px 10px;
  background: rgba(0,0,0,.65);
  color: #fff;
  font-size: 12px;
  border-radius: var(--radius-pill);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  backdrop-filter: blur(4px);
  font-family: var(--font-num);
}

.card-hot svg {
  width: 12px;
  height: 12px;
}

.card-info {
  padding: 16px 20px 20px;
}

.card-info h3 {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.45;
  margin-bottom: 6px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.card-info p {
  font-size: 13px;
  color: var(--sub);
}

/* ===== Comment Placeholder ===== */
.comment-section {
  padding: 32px 0 64px;
}

.comment-placeholder {
  border-top: 2px dashed var(--line);
  padding: 48px 24px;
  text-align: center;
  background: var(--surface);
  border-radius: 0 0 var(--radius) var(--radius);
  border-left: 1px solid var(--line);
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.comment-placeholder p {
  color: var(--sub);
  font-size: 14px;
  margin-bottom: 8px;
}

.comment-placeholder .comment-icon {
  font-size: 28px;
  margin-bottom: 12px;
  opacity: .4;
}

/* ===== Footer ===== */
.site-footer {
  background: var(--darkbg);
  color: #9C9FA5;
  padding: 64px 24px 32px;
}

.footer-grid {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.6fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
}

.footer-desc {
  font-size: 14px;
  line-height: 1.7;
  color: #9C9FA5;
  max-width: 320px;
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 18px;
}

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-col ul li a {
  color: #9C9FA5;
  font-size: 14px;
  transition: var(--transition);
}

.footer-col ul li a:hover {
  color: #fff;
  text-decoration: underline;
  text-underline-offset: 4px;
}

.footer-contact li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: #9C9FA5;
}

.footer-contact li span {
  opacity: .7;
}

.footer-bottom {
  max-width: 1280px;
  margin: 0 auto;
  border-top: 1px solid rgba(255,255,255,.1);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: #8C8F96;
}

.footer-bottom span:last-child {
  color: rgba(255,255,255,.4);
}

/* ===== Mobile Tab ===== */
.mobile-tab {
  display: none;
}

/* ===== Responsive ===== */
@media (max-width: 1023px) {
  .nav-links {
    display: none;
  }
  .nav-links.mobile-open {
    display: flex;
    position: fixed;
    top: 64px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    background: #fff;
    padding: 16px 24px;
    gap: 4px;
    box-shadow: 0 20px 40px rgba(21,22,26,.12);
    border-bottom: 1px solid var(--line);
  }
  .nav-links.mobile-open a {
    color: var(--ink);
    padding: 12px 8px;
    border-radius: var(--radius-sm);
    font-weight: 500;
  }
  .nav-links.mobile-open a:hover {
    background: var(--bg);
    color: var(--primary-strong);
  }
  .nav-links.mobile-open a::after {
    display: none;
  }
  .header-burger {
    display: inline-flex;
  }
  .header-inner {
    height: 64px;
  }
  .related-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 767px) {
  .container {
    padding: 0 20px;
  }
  body {
    padding-bottom: calc(56px + env(safe-area-inset-bottom));
  }
  .article-hero {
    padding: 140px 0 48px;
  }
  .article-hero h1 {
    font-size: 24px;
    line-height: 1.4;
  }
  .article-meta {
    font-size: 12px;
    gap: 6px;
  }
  .article-card {
    padding: 24px 20px;
    border-radius: 12px;
    margin-top: 28px;
  }
  .article-body {
    font-size: 16px;
  }
  .article-body h2 {
    font-size: 21px;
  }
  .section-head h2 {
    font-size: 24px;
  }
  .related-grid {
    grid-template-columns: 1fr;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .footer-bottom {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
  .nav-cta .btn {
    display: none;
  }
  .card-info h3 {
    font-size: 15px;
  }
  .comment-placeholder {
    padding: 32px 20px;
  }
  .breadcrumb .current {
    max-width: 200px;
  }

  /* 移动端底部 Tab */
  .mobile-tab {
    display: flex;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    height: calc(56px + env(safe-area-inset-bottom));
    padding-bottom: env(safe-area-inset-bottom);
    background: rgba(255,255,255,.96);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-top: 1px solid var(--line);
    z-index: 999;
  }
  .mobile-tab a {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 3px;
    font-size: 11px;
    font-weight: 500;
    color: #8C8F96;
    transition: var(--transition);
    position: relative;
  }
  .mobile-tab a svg {
    width: 22px;
    height: 22px;
  }
  .mobile-tab a:hover {
    color: var(--accent-dark);
  }
  .mobile-tab a.active {
    color: var(--accent);
  }
  .mobile-tab a.active::after {
    content: '';
    width: 4px;
    height: 4px;
    background: var(--accent);
    border-radius: 50%;
    position: absolute;
    bottom: 4px;
    left: 50%;
    transform: translateX(-50%);
  }
}

/* roulang page: category2 */
:root {
  --bg: #F6F5F2;
  --surface: #FFFFFF;
  --ink: #15161A;
  --sub: #5C5F66;
  --line: #E5E3DE;
  --primary: #C9A227;
  --primary-strong: #A8881C;
  --primary-tint: #F5EFDD;
  --accent: #10B0A0;
  --accent-dark: #0C8D80;
  --accent-tint: #E6F5F2;
  --darkbg: #121316;
  --danger: #C94B3B;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow-sm: 0 1px 2px rgba(21,22,26,.04);
  --shadow-md: 0 12px 32px rgba(21,22,26,.10);
  --shadow-lg: 0 24px 64px rgba(21,22,26,.16);
  --transition: all .25s ease;
  --font: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--ink);
  line-height: 1.8;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
a {
  color: var(--accent-dark);
  text-decoration: none;
  transition: var(--transition);
}
a:hover {
  color: var(--primary-strong);
}
img {
  max-width: 100%;
  display: block;
}
button, input {
  font-family: inherit;
  font-size: inherit;
}
ul, ol {
  list-style: none;
}
:focus-visible {
  outline: 2px dotted var(--accent);
  outline-offset: 4px;
}
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  padding: 0 28px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.btn-primary:hover {
  background: var(--primary-strong);
  border-color: var(--primary-strong);
  color: #fff;
  transform: translateY(-1px);
}
.btn-primary:active {
  transform: translateY(0);
}
.btn-outline {
  background: transparent;
  color: var(--ink);
  border-color: var(--line);
}
.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent-dark);
}
.btn-white {
  background: #fff;
  color: var(--ink);
  border-color: #fff;
}
.btn-white:hover {
  background: var(--primary-tint);
  border-color: var(--primary-tint);
  color: var(--ink);
  transform: translateY(-1px);
}
.btn-lg {
  height: 56px;
  padding: 0 40px;
  font-size: 16px;
  border-radius: 32px;
}
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  background: var(--primary-tint);
  color: var(--primary-strong);
}
.badge-gold {
  background: rgba(201,162,39,.18);
  color: var(--primary);
  font-size: 12px;
  letter-spacing: .08em;
  padding: 5px 14px;
}

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: transparent;
  transition: var(--transition);
}
.site-header.scrolled {
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 24px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.2;
  flex-shrink: 0;
}
.logo:hover {
  color: var(--ink);
}
.logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--primary-strong));
  color: #fff;
  font-size: 20px;
  font-weight: 800;
  flex-shrink: 0;
}
.nav-links {
  display: flex;
  gap: 28px;
}
.nav-links a {
  color: var(--ink);
  font-size: 15px;
  font-weight: 500;
  padding: 6px 0;
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute;
  left: 0;
  bottom: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
  transition: var(--transition);
}
.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}
.nav-links a.active {
  color: var(--accent-dark);
}
.nav-cta {
  display: flex;
  align-items: center;
  gap: 12px;
}
.nav-login {
  height: 42px;
  padding: 0 22px;
  font-size: 14px;
}
.header-burger {
  display: none;
  background: none;
  border: none;
  width: 42px;
  height: 42px;
  border-radius: 8px;
  cursor: pointer;
  color: var(--ink);
  align-items: center;
  justify-content: center;
}
.header-burger:hover {
  background: var(--bg);
}
.header-burger svg {
  width: 22px;
  height: 22px;
}
.mobile-menu {
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  background: rgba(255,255,255,.98);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
  padding: 16px 24px 24px;
  transform: translateY(-8px);
  opacity: 0;
  pointer-events: none;
  transition: var(--transition);
  z-index: 99;
}
.mobile-menu.open {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}
.mobile-menu a {
  display: block;
  padding: 14px 0;
  font-size: 16px;
  font-weight: 500;
  color: var(--ink);
  border-bottom: 1px solid var(--line);
}
.mobile-menu a:last-child {
  border-bottom: none;
}
.mobile-menu a.active {
  color: var(--accent-dark);
  font-weight: 600;
}

/* ===== Mobile Tab Bar ===== */
.mobile-tabbar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 200;
  background: rgba(255,255,255,.98);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-top: 1px solid var(--line);
  height: 56px;
  padding-bottom: env(safe-area-inset-bottom);
}
.mobile-tabbar nav {
  display: flex;
  height: 100%;
}
.mobile-tabbar a {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2px;
  font-size: 11px;
  color: #8C8F96;
  transition: var(--transition);
}
.mobile-tabbar a svg {
  width: 22px;
  height: 22px;
}
.mobile-tabbar a.active {
  color: var(--accent);
}
.mobile-tabbar a.active::after {
  content: '';
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--accent);
  margin-top: 1px;
}

/* ===== Hero ===== */
.category-hero {
  position: relative;
  padding: 140px 0 100px;
  background: linear-gradient(to right, rgba(18,19,22,.82), rgba(18,19,22,.55)), url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  color: #fff;
  overflow: hidden;
}
.category-hero::after {
  content: '02';
  position: absolute;
  right: -20px;
  bottom: -60px;
  font-size: 280px;
  line-height: 1;
  font-weight: 800;
  color: rgba(255,255,255,.04);
  pointer-events: none;
  font-family: Georgia, serif;
}
.hero-breadcrumb {
  font-size: 13px;
  color: rgba(255,255,255,.65);
  margin-bottom: 24px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.hero-breadcrumb a {
  color: rgba(255,255,255,.75);
}
.hero-breadcrumb a:hover {
  color: #fff;
}
.hero-breadcrumb .sep {
  color: rgba(255,255,255,.4);
}
.hero-breadcrumb .current {
  color: rgba(255,255,255,.95);
}
.category-hero h1 {
  font-size: 48px;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 16px;
  letter-spacing: .02em;
}
.hero-desc {
  font-size: 16px;
  color: rgba(255,255,255,.8);
  max-width: 560px;
  line-height: 1.8;
  margin-bottom: 32px;
}
.hero-tags {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  border-radius: 999px;
  font-size: 13px;
  background: rgba(255,255,255,.1);
  border: 1px solid rgba(255,255,255,.18);
  color: rgba(255,255,255,.9);
}
.hero-scroll {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  color: rgba(255,255,255,.6);
  font-size: 12px;
  letter-spacing: .1em;
  animation: scrollPulse 2s ease-in-out infinite;
}
.hero-scroll svg {
  width: 20px;
  height: 20px;
}
@keyframes scrollPulse {
  0%, 100% { transform: translateX(-50%) translateY(0); opacity: .6; }
  50% { transform: translateX(-50%) translateY(6px); opacity: 1; }
}

/* ===== Section Common ===== */
.section {
  padding: 72px 0;
}
.section-header {
  margin-bottom: 44px;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
}
.section-header h2 {
  font-size: 28px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--ink);
  position: relative;
}
.section-header h2::before {
  content: '';
  display: inline-block;
  width: 4px;
  height: 24px;
  border-radius: 4px;
  background: var(--primary);
  margin-right: 12px;
  vertical-align: -3px;
}
.section-desc {
  font-size: 15px;
  color: var(--sub);
  max-width: 600px;
  line-height: 1.7;
}
.section-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--accent-dark);
  text-decoration: underline;
  text-underline-offset: 4px;
  white-space: nowrap;
}
.section-link:hover {
  color: var(--primary-strong);
}

/* ===== Steps Section ===== */
.steps-section {
  background: var(--bg);
}
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.step-card {
  position: relative;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px 24px 28px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}
.step-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
  border-color: rgba(201,162,39,.3);
}
.step-num {
  font-size: 44px;
  font-weight: 800;
  line-height: 1;
  color: var(--primary-tint);
  font-family: Georgia, serif;
  margin-bottom: 20px;
  display: block;
}
.step-card:hover .step-num {
  color: var(--primary);
}
.step-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 12px;
  line-height: 1.4;
}
.step-card p {
  font-size: 14px;
  color: var(--sub);
  line-height: 1.7;
}

/* ===== Login Methods ===== */
.methods-section {
  background: var(--surface);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.methods-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.method-card {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.method-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  opacity: 0;
  transition: var(--transition);
}
.method-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
  border-color: rgba(16,176,160,.25);
}
.method-card:hover::before {
  opacity: 1;
}
.method-icon {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  background: var(--accent-tint);
  color: var(--accent-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}
.method-icon svg {
  width: 24px;
  height: 24px;
}
.method-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 10px;
}
.method-card p {
  font-size: 14px;
  color: var(--sub);
  line-height: 1.7;
  margin-bottom: 16px;
}
.method-tag {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--accent-dark);
  background: var(--accent-tint);
  padding: 4px 12px;
  border-radius: 999px;
}

/* ===== Security Block ===== */
.security-section {
  background: var(--bg);
  overflow: hidden;
}
.security-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.security-media {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  height: 380px;
  box-shadow: var(--shadow-md);
}
.security-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}
.security-media::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(18,19,22,.35), transparent 50%);
}
.security-media:hover img {
  transform: scale(1.03);
}
.security-badge {
  position: absolute;
  bottom: 20px;
  left: 20px;
  z-index: 2;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(8px);
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
}
.security-content {
  padding: 20px 0;
}
.security-content .badge {
  margin-bottom: 18px;
}
.security-content h2 {
  font-size: 28px;
  font-weight: 700;
  line-height: 1.4;
  margin-bottom: 18px;
}
.security-content > p {
  font-size: 15px;
  color: var(--sub);
  line-height: 1.8;
  margin-bottom: 28px;
}
.security-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.security-item {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 16px;
}
.security-item svg {
  width: 20px;
  height: 20px;
  color: var(--accent);
  flex-shrink: 0;
  margin-top: 2px;
}
.security-item div strong {
  display: block;
  font-size: 14px;
  font-weight: 600;
  margin-bottom: 4px;
}
.security-item div span {
  font-size: 13px;
  color: var(--sub);
  line-height: 1.5;
}

/* ===== Scenario Section ===== */
.scenario-section {
  background: var(--surface);
  border-top: 1px solid var(--line);
}
.scenario-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
  align-items: start;
}
.scenario-card {
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: var(--transition);
}
.scenario-card:nth-child(2) {
  margin-top: 32px;
}
.scenario-card:nth-child(3) {
  margin-top: 16px;
}
.scenario-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}
.scenario-media {
  height: 180px;
  overflow: hidden;
  position: relative;
}
.scenario-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition);
}
.scenario-card:hover .scenario-media img {
  transform: scale(1.04);
}
.scenario-media::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(18,19,22,.2), transparent 60%);
}
.scenario-body {
  padding: 20px;
}
.scenario-body h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 8px;
  line-height: 1.4;
}
.scenario-body p {
  font-size: 14px;
  color: var(--sub);
  line-height: 1.7;
  margin-bottom: 14px;
}
.scenario-link {
  font-size: 13px;
  font-weight: 600;
  color: var(--accent-dark);
}

/* ===== FAQ ===== */
.faq-section {
  background: var(--bg);
}
.faq-wrap {
  max-width: 760px;
  margin: 0 auto;
}
.faq-item {
  border-bottom: 1px solid var(--line);
}
.faq-item:first-child {
  border-top: 1px solid var(--line);
}
.faq-q {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 24px 0;
  cursor: pointer;
  user-select: none;
}
.faq-q-icon {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--primary-tint);
  color: var(--primary-strong);
  font-size: 13px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.faq-q-text {
  font-size: 16px;
  font-weight: 600;
  color: var(--ink);
  flex: 1;
  line-height: 1.5;
}
.faq-q-toggle {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: var(--sub);
  transition: var(--transition);
  flex-shrink: 0;
  border: none;
  background: none;
  cursor: pointer;
}
.faq-item.open .faq-q-toggle {
  transform: rotate(45deg);
  color: var(--accent);
}
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height .3s ease;
}
.faq-a-inner {
  padding: 0 0 24px 40px;
  font-size: 15px;
  color: var(--sub);
  line-height: 1.8;
}

/* ===== CTA ===== */
.cta-section {
  position: relative;
  padding: 80px 0;
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  text-align: center;
  color: #fff;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  top: -40px;
  right: -40px;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: rgba(255,255,255,.06);
}
.cta-section::after {
  content: '';
  position: absolute;
  bottom: -80px;
  left: -60px;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: rgba(0,0,0,.05);
}
.cta-inner {
  position: relative;
  z-index: 2;
}
.cta-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255,255,255,.2);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: 6px 18px;
  border-radius: 999px;
  letter-spacing: .08em;
  margin-bottom: 24px;
}
.cta-inner h2 {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 14px;
  line-height: 1.3;
}
.cta-inner p {
  font-size: 15px;
  color: rgba(255,255,255,.88);
  max-width: 560px;
  margin: 0 auto 32px;
  line-height: 1.8;
}
.cta-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}
.cta-extra {
  display: flex;
  gap: 16px;
  justify-content: center;
  margin-top: 20px;
  font-size: 12px;
  color: rgba(255,255,255,.75);
}
.cta-extra span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.cta-extra svg {
  width: 14px;
  height: 14px;
}

/* ===== Footer ===== */
.site-footer {
  background: var(--darkbg);
  color: #9C9FA5;
  padding: 64px 24px 32px;
}
.footer-grid {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 48px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.footer-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 14px;
}
.footer-desc {
  font-size: 14px;
  line-height: 1.8;
  color: #8A8D93;
  max-width: 280px;
}
.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 18px;
}
.footer-col ul li {
  margin-bottom: 10px;
  font-size: 14px;
}
.footer-col ul li a {
  color: #9C9FA5;
  transition: var(--transition);
}
.footer-col ul li a:hover {
  color: #fff;
  text-decoration: underline;
  text-underline-offset: 4px;
}
.footer-contact li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: #9C9FA5;
}
.footer-contact li span {
  color: var(--primary);
}
.footer-bottom {
  max-width: 1280px;
  margin: 0 auto;
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: #6C6F76;
  flex-wrap: wrap;
  gap: 12px;
}

/* ===== Responsive ===== */
@media (max-width: 1023px) {
  .nav-links {
    display: none;
  }
  .header-burger {
    display: flex;
  }
  .nav-login {
    display: none;
  }
  .steps-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .methods-grid {
    gap: 20px;
  }
  .security-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .security-media {
    height: 320px;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }
}

@media (max-width: 767px) {
  .site-header {
    background: rgba(255,255,255,.92);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--line);
  }
  .header-inner {
    height: 56px;
  }
  .logo {
    font-size: 18px;
  }
  .logo-icon {
    width: 32px;
    height: 32px;
    font-size: 16px;
    border-radius: 8px;
  }
  .category-hero {
    padding: 100px 0 80px;
  }
  .category-hero::after {
    font-size: 180px;
  }
  .category-hero h1 {
    font-size: 32px;
  }
  .hero-desc {
    font-size: 15px;
  }
  .section {
    padding: 48px 0;
  }
  .section-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 10px;
    margin-bottom: 32px;
  }
  .section-header h2 {
    font-size: 23px;
  }
  .steps-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .methods-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .security-grid {
    gap: 28px;
  }
  .security-media {
    height: 240px;
  }
  .security-content h2 {
    font-size: 23px;
  }
  .security-list {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .scenario-cards {
    grid-template-columns: 1fr;
    gap: 20px;
  }
  .scenario-card:nth-child(2),
  .scenario-card:nth-child(3) {
    margin-top: 0;
  }
  .faq-q-text {
    font-size: 15px;
  }
  .cta-section {
    padding: 56px 0;
  }
  .cta-inner h2 {
    font-size: 26px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
    gap: 8px;
  }
  .mobile-tabbar {
    display: block;
  }
  body {
    padding-bottom: 56px;
  }
}

@media (max-width: 520px) {
  .container {
    padding: 0 16px;
  }
  .logo span:not(.logo-icon) {
    font-size: 17px;
  }
  .hero-tags {
    gap: 8px;
  }
  .hero-tag {
    font-size: 12px;
    padding: 4px 12px;
  }
  .btn-lg {
    height: 48px;
    padding: 0 28px;
    font-size: 15px;
  }
  .cta-actions {
    flex-direction: column;
    gap: 12px;
  }
  .cta-actions .btn {
    width: 100%;
  }
  .security-media {
    height: 200px;
  }
}