/* roulang page: index */
:root {
  --primary: #1C64A3;
  --primary-soft: rgba(28,100,163,0.09);
  --primary-soft-2: rgba(28,100,163,0.14);
  --primary-border: rgba(28,100,163,0.3);
  --accent: #C9A55C;
  --accent-hover: #b8904a;
  --accent-soft: rgba(201,165,92,0.12);
  --bg: #F6F7F9;
  --card-bg: #FFFFFF;
  --text-dark: #1F2A37;
  --text-body: #374151;
  --text-muted: #6B7280;
  --border: #E5E7EB;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --radius-pill: 999px;
  --shadow-card: 0 1px 3px rgba(31,42,55,0.04), 0 8px 24px rgba(31,42,55,0.06);
  --shadow-hover: 0 2px 6px rgba(31,42,55,0.06), 0 16px 32px rgba(31,42,55,0.10);
  --font-family: "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", sans-serif;
  --container: 1200px;
  --space-section: 80px;
  --space-section-mobile: 48px;
  --transition: all 0.3s 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: 1.8;
  background: var(--bg);
  color: var(--text-body);
  -webkit-font-smoothing: antialiased;
  padding-bottom: 80px;
}

img {
  max-width: 100%;
  display: block;
  border-radius: var(--radius-md);
}

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

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

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

h1, h2, h3, h4, h5, h6 {
  color: var(--text-dark);
  line-height: 1.4;
  font-weight: 700;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-pill);
  font-size: 16px;
  font-weight: 600;
  padding: 0 28px;
  height: 48px;
  transition: var(--transition);
  white-space: nowrap;
  cursor: pointer;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 4px 14px rgba(201,165,92,0.28);
}

.btn-primary:hover {
  background: var(--accent-hover);
  box-shadow: 0 6px 20px rgba(201,165,92,0.36);
  transform: translateY(-2px);
}

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

.btn-outline {
  background: #fff;
  border: 1.5px solid var(--primary);
  color: var(--primary);
}

.btn-outline:hover {
  background: var(--primary-soft);
  border-color: var(--primary);
}

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

.btn-sm {
  height: 40px;
  padding: 0 20px;
  font-size: 14px;
}

.btn:focus-visible,
a:focus-visible,
button:focus-visible {
  outline: 3px solid rgba(28,100,163,0.4);
  outline-offset: 2px;
}

/* ============ Header Navigation ============ */
.site-header {
  position: fixed;
  top: 16px;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 0 24px;
  pointer-events: none;
}

.site-header .nav-wrapper {
  max-width: 1120px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: rgba(255,255,255,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: var(--radius-pill);
  padding: 10px 16px 10px 24px;
  box-shadow: 0 2px 12px rgba(31,42,55,0.06);
  border: 1px solid rgba(229,231,235,0.6);
  transition: var(--transition);
  pointer-events: auto;
}

.site-header.scrolled .nav-wrapper {
  background: rgba(255,255,255,0.95);
  box-shadow: 0 4px 20px rgba(31,42,55,0.09);
  border-color: rgba(229,231,235,0.8);
}

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

.logo-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--primary-soft);
  border: 1px solid var(--primary-border);
}

.logo-icon-dot {
  width: 12px;
  height: 12px;
  border-radius: 4px;
  background: var(--primary);
}

.logo-icon-dot::after {
  content: "";
  display: block;
  width: 12px;
  height: 12px;
  border-radius: 4px;
  background: var(--accent);
  margin: 0;
  transform: translate(4px, -8px);
  opacity: 0.85;
}

.logo-text {
  font-size: 17px;
  font-weight: 700;
  color: var(--text-dark);
  letter-spacing: 0.2px;
  white-space: nowrap;
}

.logo-text em {
  font-style: normal;
  color: var(--primary);
  font-weight: 600;
  font-size: 13px;
  margin-left: 4px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-links a {
  display: inline-block;
  padding: 8px 16px;
  border-radius: var(--radius-pill);
  font-size: 15px;
  font-weight: 500;
  color: var(--text-body);
  transition: var(--transition);
}

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

.nav-links a.active {
  background: var(--primary);
  color: #fff;
  font-weight: 600;
}

.nav-cta {
  margin-left: 8px;
  height: 38px;
  padding: 0 20px;
  font-size: 14px;
  background: var(--accent);
  color: #fff;
  border-radius: var(--radius-pill);
  display: flex;
  align-items: center;
  font-weight: 600;
  transition: var(--transition);
  white-space: nowrap;
}

.nav-cta:hover {
  background: var(--accent-hover);
  box-shadow: 0 4px 14px rgba(201,165,92,0.3);
}

.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 10px;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.menu-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--text-dark);
  border-radius: 2px;
  position: relative;
  transition: var(--transition);
}

.menu-toggle span::before,
.menu-toggle span::after {
  content: "";
  position: absolute;
  left: 0;
  width: 18px;
  height: 2px;
  background: var(--text-dark);
  border-radius: 2px;
  transition: var(--transition);
}

.menu-toggle span::before {
  top: -6px;
}

.menu-toggle span::after {
  top: 6px;
}

.menu-toggle.active span {
  background: transparent;
}

.menu-toggle.active span::before {
  top: 0;
  transform: rotate(45deg);
}

.menu-toggle.active span::after {
  top: 0;
  transform: rotate(-45deg);
}

/* ============ Hero ============ */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  padding: 140px 0 96px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 0;
}

.hero-bg-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(246,247,249,0.98) 0%, rgba(246,247,249,0.94) 40%, rgba(246,247,249,0.78) 70%, rgba(246,247,249,0.5) 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 640px;
  padding: 0 24px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  border: 1.5px solid var(--accent);
  color: var(--accent-hover);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1px;
  background: #fff;
  margin-bottom: 24px;
}

.hero-badge::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

.hero h1 {
  font-size: 46px;
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 20px;
  color: var(--text-dark);
}

.hero-sub {
  font-size: 18px;
  line-height: 1.8;
  color: var(--text-body);
  margin-bottom: 36px;
  max-width: 520px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* ============ Trust Bar ============ */
.trust-bar {
  background: #fff;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 20px 0;
}

.trust-items {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  gap: 0;
}

.trust-item {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 28px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-body);
  position: relative;
}

.trust-item::after {
  content: "";
  position: absolute;
  right: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 1px;
  height: 20px;
  background: var(--border);
}

.trust-item:last-child::after {
  display: none;
}

.trust-item i {
  font-style: normal;
  width: 22px;
  height: 22px;
  border-radius: 6px;
  background: var(--primary-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  color: var(--primary);
  font-weight: 700;
}

/* ============ Sections ============ */
.section {
  padding: var(--space-section) 0;
}

.section-head {
  text-align: center;
  margin-bottom: 56px;
}

.section-head h2 {
  font-size: 32px;
  font-weight: 800;
  margin-bottom: 12px;
}

.section-head p {
  font-size: 16px;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto;
}

/* ============ Feature Cards ============ */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  box-shadow: var(--shadow-card);
  border: 1px solid var(--border);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  opacity: 0;
  transition: var(--transition);
}

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

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

.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-md);
  background: var(--primary-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
}

.feature-icon svg {
  width: 26px;
  height: 26px;
  stroke: var(--primary);
  stroke-width: 1.8;
  fill: none;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.feature-card h3 {
  font-size: 20px;
  font-weight: 700;
  margin-bottom: 12px;
}

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

/* ============ Scenario Section ============ */
.scenario-section {
  background: #fff;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.scenario-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.scenario-media img {
  width: 100%;
  height: 420px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

.scenario-content h2 {
  font-size: 30px;
  font-weight: 800;
  margin-bottom: 16px;
}

.scenario-content .scenario-desc {
  font-size: 15px;
  color: var(--text-muted);
  margin-bottom: 32px;
}

.scenario-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.scenario-list-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.scenario-list-num {
  width: 32px;
  height: 32px;
  border-radius: 10px;
  background: var(--accent-soft);
  color: var(--accent-hover);
  font-size: 14px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.scenario-list-body h4 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 4px;
}

.scenario-list-body p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ============ Stats ============ */
.stats-section {
  padding: 60px 0;
}

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

.stat-item {
  text-align: center;
  padding: 40px 24px;
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  border: 1px solid var(--border);
  transition: var(--transition);
}

.stat-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.stat-num {
  display: block;
  font-size: 44px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.2;
  margin-bottom: 8px;
  font-variant-numeric: tabular-nums;
}

.stat-label {
  font-size: 14px;
  color: var(--text-muted);
  font-weight: 500;
}

/* ============ News Section ============ */
.news-section {
  padding: var(--space-section) 0;
  background: var(--bg);
}

.section-head-inline {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  margin-bottom: 40px;
}

.section-head-inline h2 {
  font-size: 30px;
  font-weight: 800;
}

.section-head-inline .section-more {
  font-size: 14px;
  color: var(--primary);
  font-weight: 600;
}

.section-head-inline .section-more:hover {
  text-decoration: underline;
}

.news-grid {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 24px;
}

/* Featured card */
.news-feature-card {
  display: flex;
  flex-direction: column;
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: var(--transition);
  height: 100%;
}

.news-feature-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}

.news-feature-media {
  width: 100%;
  height: 240px;
  overflow: hidden;
}

.news-feature-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: 0;
  transition: var(--transition);
}

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

.news-feature-body {
  padding: 28px 28px 24px;
  display: flex;
  flex-direction: column;
  flex: 1;
}

.news-tag {
  display: inline-block;
  padding: 4px 12px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--accent);
  color: var(--accent-hover);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 14px;
  width: fit-content;
}

.news-feature-body h3 {
  font-size: 22px;
  font-weight: 700;
  line-height: 1.5;
  margin-bottom: 12px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-feature-body p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 20px;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-feature-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: auto;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

.news-date {
  font-size: 13px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}

.news-read-more {
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
}

/* Side cards */
.news-side-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.news-side-item {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  border: 1px solid var(--border);
  padding: 20px 24px;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.news-side-item + .news-side-item {
  margin-top: 16px;
}

.news-side-item:hover {
  box-shadow: var(--shadow-hover);
  transform: translateX(4px);
  border-color: var(--primary-border);
}

.news-side-item h4 {
  font-size: 16px;
  font-weight: 600;
  line-height: 1.5;
  color: var(--text-dark);
  transition: var(--transition);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-side-item:hover h4 {
  color: var(--primary);
}

.news-side-item .news-date {
  font-size: 13px;
  color: var(--text-muted);
}

/* Empty state */
.news-empty-state {
  grid-column: 1 / -1;
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  border: 1px dashed var(--border);
  padding: 80px 40px;
  text-align: center;
  color: var(--text-muted);
}

.news-empty-icon {
  font-size: 40px;
  margin-bottom: 16px;
  display: block;
}

.news-empty-state p {
  font-size: 15px;
}

/* ============ FAQ ============ */
.faq-section {
  padding: var(--space-section) 0;
  background: #fff;
}

.faq-container {
  max-width: 800px;
  margin: 0 auto;
}

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

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

.faq-item summary {
  list-style: none;
  cursor: pointer;
  padding: 24px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-dark);
  transition: var(--transition);
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

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

.faq-icon {
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: var(--primary-soft);
  position: relative;
  flex-shrink: 0;
  transition: var(--transition);
}

.faq-icon::before,
.faq-icon::after {
  content: "";
  position: absolute;
  background: var(--primary);
  border-radius: 2px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.faq-icon::before {
  width: 12px;
  height: 2px;
}

.faq-icon::after {
  width: 2px;
  height: 12px;
  transition: var(--transition);
}

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

.faq-item[open] .faq-icon {
  background: var(--primary);
}

.faq-item[open] .faq-icon::before {
  background: #fff;
}

.faq-answer {
  padding: 0 28px 24px 0;
  font-size: 15px;
  line-height: 1.9;
  color: var(--text-body);
}

/* ============ CTA Section ============ */
.cta-section {
  padding: 72px 0;
  background: transparent;
}

.cta-inner {
  background: linear-gradient(135deg, rgba(28,100,163,0.08) 0%, rgba(28,100,163,0.03) 100%);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(28,100,163,0.14);
  padding: 72px 64px;
  text-align: center;
}

.cta-inner h2 {
  font-size: 30px;
  font-weight: 800;
  margin-bottom: 16px;
}

.cta-inner p {
  font-size: 15px;
  color: var(--text-muted);
  margin-bottom: 32px;
  max-width: 520px;
  margin-left: auto;
  margin-right: auto;
}

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

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 1fr;
  gap: 48px;
  margin-bottom: 48px;
}

.footer-brand .logo-text {
  font-size: 18px;
  display: block;
  margin-bottom: 12px;
}

.footer-brand p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.8;
  max-width: 340px;
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 700;
  margin-bottom: 18px;
  color: var(--text-dark);
}

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

.footer-col ul a {
  font-size: 14px;
  color: var(--text-muted);
  transition: var(--transition);
}

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

.footer-copyright {
  padding-top: 24px;
  border-top: 1px solid var(--border);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: var(--text-muted);
}

.footer-copyright .domain {
  font-weight: 600;
  color: var(--text-body);
}

/* ============ Float Bar ============ */
.float-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 999;
  background: #fff;
  border-top: 1px solid var(--border);
  box-shadow: 0 -4px 16px rgba(31,42,55,0.04);
  height: 64px;
  display: flex;
  align-items: center;
}

.float-bar-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
}

.float-bar p {
  font-size: 14px;
  color: var(--text-body);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-right: 24px;
}

.float-bar .btn {
  flex-shrink: 0;
}

/* ============ Responsive ============ */
@media (max-width: 1024px) {
  .nav-links {
    display: none;
  }

  .nav-links.open {
    display: flex;
    position: absolute;
    top: calc(100% + 12px);
    left: 0;
    right: 0;
    background: #fff;
    border-radius: 20px;
    flex-direction: column;
    padding: 16px;
    box-shadow: var(--shadow-hover);
    border: 1px solid var(--border);
    gap: 4px;
  }

  .nav-links.open a {
    width: 100%;
    text-align: center;
    padding: 14px 20px;
    font-size: 15px;
    border-radius: 12px;
  }

  .menu-toggle {
    display: flex;
  }

  .nav-cta {
    display: none;
  }

  .nav-links.open .nav-cta-mobile {
    display: flex;
    width: 100%;
    height: 44px;
    align-items: center;
    justify-content: center;
    background: var(--accent);
    color: #fff;
    border-radius: 12px;
    font-weight: 600;
    margin-top: 8px;
  }

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

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

  .scenario-media img {
    height: 300px;
  }

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

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

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

@media (max-width: 768px) {
  .section {
    padding: var(--space-section-mobile) 0;
  }

  .hero {
    min-height: auto;
    padding: 120px 0 64px;
  }

  .hero h1 {
    font-size: 30px;
  }

  .hero-sub {
    font-size: 16px;
  }

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

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

  .trust-item {
    padding: 6px 16px;
  }

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

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

  .feature-card {
    padding: 28px 24px;
  }

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

  .news-feature-media {
    height: 200px;
  }

  .cta-inner {
    padding: 48px 24px;
  }

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

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

  .footer-copyright {
    flex-direction: column;
    align-items: flex-start;
  }

  .float-bar {
    height: auto;
    padding: 10px 0;
  }

  .float-bar-inner {
    flex-direction: column;
    gap: 8px;
    align-items: flex-start;
  }

  .float-bar p {
    font-size: 13px;
    white-space: normal;
    width: 100%;
    margin-right: 0;
  }

  .float-bar .btn {
    width: 100%;
  }
}

@media (max-width: 520px) {
  .container {
    padding: 0 16px;
  }

  .site-header {
    padding: 0 16px;
  }

  .site-header .nav-wrapper {
    padding: 8px 12px 8px 18px;
  }

  .logo-text {
    font-size: 15px;
  }

  .logo-text em {
    font-size: 12px;
  }

  .hero {
    padding-top: 104px;
  }

  .hero h1 {
    font-size: 27px;
  }

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

  .trust-items {
    gap: 4px;
  }

  .trust-item {
    padding: 4px 12px;
    font-size: 13px;
  }

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

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

  .stat-item {
    padding: 28px 16px;
  }

  .news-feature-body {
    padding: 20px;
  }
}

@media (max-width: 420px) {
  .trust-items {
    flex-direction: column;
    gap: 4px;
  }

  .trust-item::after {
    display: none;
  }

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

/* roulang page: category1 */
:root {
  --primary: #1C64A3;
  --primary-dark: #144F82;
  --primary-light: rgba(28, 100, 163, 0.08);
  --accent: #C9A55C;
  --accent-hover: #D4B36E;
  --accent-dark: #9C7A35;
  --bg: #F6F7F9;
  --card: #FFFFFF;
  --title: #1F2A37;
  --text: #374151;
  --muted: #6B7280;
  --border: #E5E7EB;
  --radius-lg: 20px;
  --radius: 16px;
  --radius-sm: 12px;
  --shadow: 0 1px 3px rgba(31,42,55,0.04), 0 8px 24px rgba(31,42,55,0.06);
  --shadow-hover: 0 2px 6px rgba(31,42,55,0.06), 0 16px 32px rgba(31,42,55,0.10);
  --font-family: "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.2s;
}

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

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

ul, ol {
  list-style: none;
}

button {
  font-family: inherit;
  cursor: pointer;
}

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 100px 0;
}

.section-head {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 52px;
}

.section-head h2 {
  font-size: 30px;
  font-weight: 700;
  color: var(--title);
  line-height: 1.4;
  margin-bottom: 14px;
}

.section-head p {
  font-size: 16px;
  color: var(--muted);
  line-height: 1.8;
}

.section-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--accent-dark);
  background: rgba(201, 165, 92, 0.10);
  border: 1px solid rgba(201, 165, 92, 0.35);
  padding: 5px 14px;
  border-radius: 999px;
  margin-bottom: 16px;
  letter-spacing: 0.02em;
}

/* ===== Header ===== */
.site-header {
  position: sticky;
  top: 16px;
  z-index: 1000;
  padding: 0 16px;
}

.nav-wrapper {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-radius: 999px;
  padding: 0 8px 0 20px;
  border: 1px solid rgba(255, 255, 255, 0.7);
  box-shadow: 0 1px 3px rgba(31, 42, 55, 0.04), 0 8px 24px rgba(31, 42, 55, 0.06);
  transition: box-shadow 0.3s ease, background 0.3s ease;
}

.site-header.scrolled .nav-wrapper {
  box-shadow: 0 2px 6px rgba(31, 42, 55, 0.06), 0 12px 28px rgba(31, 42, 55, 0.08);
  background: rgba(255, 255, 255, 0.96);
}

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

.logo-icon {
  width: 36px;
  height: 36px;
  border-radius: 12px;
  background: linear-gradient(135deg, #1C64A3, #155E91);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  box-shadow: 0 2px 6px rgba(28, 100, 163, 0.25);
}

.logo-icon-dot {
  width: 12px;
  height: 12px;
  background: var(--accent);
  border-radius: 50%;
  box-shadow: 0 0 0 3px rgba(201, 165, 92, 0.2);
}

.logo-text {
  font-size: 17px;
  font-weight: 700;
  color: var(--title);
  white-space: nowrap;
  letter-spacing: 0.01em;
}

.logo-text em {
  font-style: normal;
  color: var(--primary);
  font-weight: 600;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-links a {
  display: block;
  padding: 8px 16px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
  transition: all 0.2s ease;
  white-space: nowrap;
}

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

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

.nav-links a:focus-visible,
.nav-cta:focus-visible,
.btn-primary:focus-visible,
.btn-secondary:focus-visible,
.menu-toggle:focus-visible {
  outline: 3px solid rgba(28, 100, 163, 0.35);
  outline-offset: 2px;
}

.nav-cta {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 42px;
  padding: 0 22px;
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  white-space: nowrap;
  transition: background 0.25s ease, transform 0.2s ease, box-shadow 0.25s ease;
}

.nav-cta:hover {
  background: var(--accent-hover);
  color: #fff;
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(201, 165, 92, 0.35);
}

.nav-cta:active {
  transform: translateY(0);
}

.menu-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: none;
  background: transparent;
  border-radius: 12px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.menu-toggle span,
.menu-toggle span::before,
.menu-toggle span::after {
  content: '';
  display: block;
  width: 18px;
  height: 2px;
  background: var(--title);
  border-radius: 2px;
  transition: all 0.3s ease;
  position: relative;
}

.menu-toggle span::before {
  position: absolute;
  top: -6px;
}

.menu-toggle span::after {
  position: absolute;
  top: 6px;
}

.menu-toggle.open span {
  background: transparent;
}

.menu-toggle.open span::before {
  top: 0;
  transform: rotate(45deg);
}

.menu-toggle.open span::after {
  top: 0;
  transform: rotate(-45deg);
}

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

/* ===== Hero ===== */
.page-hero {
  position: relative;
  padding: 110px 0 90px;
  background: linear-gradient(120deg, rgba(246, 247, 249, 0.93) 20%, rgba(246, 247, 249, 0.82)), url('/assets/images/backpic/back-1.webp') center/cover no-repeat;
  text-align: center;
  border-bottom: 1px solid var(--border);
}

.page-hero .container {
  max-width: 840px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 16px;
  border-radius: 999px;
  border: 1px solid var(--accent);
  color: var(--accent-dark);
  font-size: 13px;
  font-weight: 500;
  background: rgba(255, 255, 255, 0.6);
  margin-bottom: 28px;
}

.page-hero h1 {
  font-size: 42px;
  font-weight: 700;
  line-height: 1.35;
  color: var(--title);
  margin: 0 0 20px;
}

.page-hero h1 span {
  color: var(--primary);
}

.hero-sub {
  font-size: 17px;
  line-height: 1.85;
  color: var(--text);
  margin: 0 0 36px;
  max-width: 680px;
  margin-left: auto;
  margin-right: auto;
}

.hero-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== Buttons ===== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  padding: 0 30px;
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: all 0.25s ease;
  box-shadow: 0 2px 8px rgba(201, 165, 92, 0.25);
}

.btn-primary:hover {
  background: var(--accent-hover);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(201, 165, 92, 0.35);
}

.btn-primary:active {
  transform: translateY(0);
  box-shadow: 0 2px 6px rgba(201, 165, 92, 0.25);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  padding: 0 30px;
  border-radius: 999px;
  background: #fff;
  color: var(--primary);
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  border: 1.5px solid var(--primary);
  cursor: pointer;
  transition: all 0.25s ease;
}

.btn-secondary:hover {
  background: var(--primary-light);
  color: var(--primary);
  transform: translateY(-2px);
  box-shadow: 0 4px 14px rgba(28, 100, 163, 0.12);
}

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

/* ===== Split intro ===== */
.split-grid {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 64px;
  align-items: center;
}

.intro-media {
  position: relative;
}

.intro-media img {
  width: 100%;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
}

.intro-media::after {
  content: '';
  position: absolute;
  bottom: -12px;
  right: -12px;
  width: 100px;
  height: 100px;
  border-radius: var(--radius-lg);
  background: rgba(28, 100, 163, 0.06);
  z-index: -1;
}

.intro-content h2 {
  font-size: 30px;
  font-weight: 700;
  color: var(--title);
  line-height: 1.4;
  margin-bottom: 20px;
}

.intro-content > p {
  font-size: 16px;
  line-height: 1.85;
  color: var(--text);
  margin-bottom: 28px;
}

.check-list li {
  display: flex;
  gap: 14px;
  padding: 14px 0;
  border-bottom: 1px solid var(--border);
  font-size: 15px;
  line-height: 1.7;
  color: var(--text);
}

.check-list li:last-child {
  border-bottom: none;
}

.check-list li::before {
  content: '';
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  margin-top: 4px;
  border-radius: 50%;
  background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 20 20' fill='none'%3E%3Ccircle cx='10' cy='10' r='10' fill='%231C64A3' fill-opacity='0.12'/%3E%3Cpath d='M6 10.5L9 13.5L14 7.5' stroke='%231C64A3' stroke-width='1.8' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E") center/contain no-repeat;
}

.check-list strong {
  color: var(--title);
  font-weight: 600;
}

.link-more {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 15px;
  font-weight: 500;
  color: var(--primary);
  margin-top: 20px;
  transition: gap 0.2s ease;
}

.link-more:hover {
  gap: 10px;
}

/* ===== Points grid ===== */
.points-section {
  background: #fff;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

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

.point-card {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 36px 28px;
  transition: all 0.3s ease;
  position: relative;
}

.point-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
  background: #fff;
  border-color: rgba(28, 100, 163, 0.25);
}

.point-icon {
  font-size: 40px;
  font-weight: 700;
  color: transparent;
  -webkit-text-stroke: 1.5px rgba(28, 100, 163, 0.3);
  line-height: 1;
  margin-bottom: 20px;
  font-variant-numeric: tabular-nums;
}

.point-card h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--title);
  margin-bottom: 12px;
}

.point-card p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
  margin: 0;
}

/* ===== FAQ ===== */
.faq-list {
  max-width: 780px;
  margin: 0 auto;
}

.faq-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  padding: 0 28px;
  transition: box-shadow 0.25s ease, border-color 0.25s ease;
}

.faq-item:hover {
  border-color: rgba(28, 100, 163, 0.25);
}

.faq-item[open] {
  box-shadow: var(--shadow);
  border-color: rgba(28, 100, 163, 0.2);
}

.faq-item summary {
  cursor: pointer;
  padding: 22px 0;
  font-size: 16px;
  font-weight: 600;
  color: var(--title);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  list-style: none;
  user-select: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: '+';
  font-size: 24px;
  font-weight: 300;
  color: var(--accent);
  line-height: 1;
  flex-shrink: 0;
  transition: transform 0.3s ease;
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
}

.faq-item p {
  padding: 0 0 22px;
  font-size: 15px;
  line-height: 1.85;
  color: var(--muted);
  margin: 0;
  animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ===== Related ===== */
.related-section {
  background: #fff;
  border-top: 1px solid var(--border);
}

.related-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  max-width: 900px;
  margin: 0 auto;
}

.related-card {
  display: block;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px 36px;
  text-decoration: none;
  transition: all 0.3s ease;
}

.related-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
  background: #fff;
  border-color: rgba(28, 100, 163, 0.25);
}

.related-label {
  display: inline-block;
  font-size: 12px;
  font-weight: 600;
  color: var(--accent-dark);
  letter-spacing: 0.06em;
  margin-bottom: 12px;
  text-transform: uppercase;
}

.related-card h3 {
  font-size: 22px;
  font-weight: 600;
  color: var(--title);
  margin-bottom: 10px;
}

.related-card p {
  font-size: 14px;
  line-height: 1.75;
  color: var(--muted);
  margin-bottom: 8px;
}

.related-card .link-more {
  margin-top: 8px;
}

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

.cta-box {
  background: linear-gradient(135deg, rgba(28, 100, 163, 0.05), rgba(28, 100, 163, 0.10));
  border: 1px solid rgba(28, 100, 163, 0.12);
  border-radius: 28px;
  padding: 72px 48px;
  text-align: center;
}

.cta-box h2 {
  font-size: 30px;
  font-weight: 700;
  color: var(--title);
  margin-bottom: 14px;
}

.cta-box p {
  font-size: 16px;
  color: var(--text);
  margin-bottom: 32px;
}

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

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

.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr 1fr 1.2fr;
  gap: 48px;
  padding-bottom: 52px;
}

.footer-brand .logo {
  margin-bottom: 18px;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--muted);
  max-width: 380px;
  margin: 0;
}

.footer-col h4 {
  font-size: 15px;
  font-weight: 600;
  color: var(--title);
  margin-bottom: 20px;
}

.footer-col ul li {
  font-size: 14px;
  line-height: 2.1;
  color: var(--muted);
}

.footer-col ul li a {
  color: var(--muted);
  transition: color 0.2s;
}

.footer-col ul li a:hover {
  color: var(--primary);
}

.footer-copyright {
  border-top: 1px solid var(--border);
  padding: 24px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  color: var(--muted);
}

.footer-copyright .domain {
  font-variant-numeric: tabular-nums;
  color: var(--muted);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .section {
    padding: 80px 0;
  }

  .split-grid {
    gap: 40px;
  }

  .cta-box {
    padding: 56px 32px;
  }

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

@media (max-width: 768px) {
  .section {
    padding: 64px 0;
  }

  .container {
    padding: 0 20px;
  }

  .site-header {
    top: 12px;
    padding: 0 12px;
  }

  .nav-wrapper {
    height: 58px;
    padding: 0 6px 0 16px;
  }

  .logo-text {
    font-size: 16px;
  }

  .nav-cta {
    display: none;
  }

  .menu-toggle {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: 82px;
    left: 16px;
    right: 16px;
    background: #fff;
    border-radius: 20px;
    box-shadow: 0 16px 40px rgba(31, 42, 55, 0.14);
    flex-direction: column;
    align-items: stretch;
    padding: 16px;
    display: none;
    z-index: 999;
    border: 1px solid var(--border);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-links a {
    padding: 12px 16px;
    font-size: 15px;
    border-radius: 12px;
    text-align: center;
  }

  .nav-links a.active {
    background: var(--primary-light);
  }

  .nav-cta-mobile {
    display: inline-flex !important;
    align-items: center;
    justify-content: center;
    margin-top: 12px;
    height: 44px;
    border-radius: 12px;
    background: var(--accent);
    color: #fff;
    font-weight: 600;
    font-size: 15px;
    text-decoration: none;
    border: none;
  }

  .page-hero {
    padding: 80px 0 60px;
  }

  .page-hero h1 {
    font-size: 28px;
    line-height: 1.4;
  }

  .hero-sub {
    font-size: 15px;
    line-height: 1.8;
  }

  .split-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .intro-content h2 {
    font-size: 24px;
  }

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

  .point-card {
    padding: 28px 24px;
  }

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

  .related-card {
    padding: 28px 24px;
  }

  .cta-box {
    padding: 48px 24px;
    border-radius: 20px;
  }

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

  .cta-actions {
    flex-direction: column;
    align-items: center;
  }

  .btn-primary,
  .btn-secondary {
    width: 100%;
    max-width: 280px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
    padding-bottom: 36px;
  }

  .footer-brand p {
    max-width: 100%;
  }

  .footer-copyright {
    flex-direction: column;
    justify-content: center;
    text-align: center;
    padding: 20px 0;
  }

  .section-head {
    margin-bottom: 36px;
  }

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

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

  .faq-item summary {
    font-size: 15px;
  }

  .faq-item p {
    font-size: 14px;
  }
}

@media (max-width: 520px) {
  .page-hero {
    padding: 64px 0 48px;
  }

  .page-hero h1 {
    font-size: 25px;
  }

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

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

  .btn-primary,
  .btn-secondary {
    width: 100%;
    max-width: 260px;
  }

  .intro-content h2 {
    font-size: 22px;
  }

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

  .cta-box p {
    font-size: 14px;
  }

  .faq-item {
    padding: 0 16px;
  }

  .cta-section {
    padding: 0 0 64px;
  }

  .site-footer {
    padding-top: 48px;
  }
}

/* roulang page: category2 */
:root {
    --primary: #1C64A3;
    --primary-dark: #154D7A;
    --primary-light: rgba(28, 100, 163, 0.10);
    --accent: #C9A55C;
    --accent-dark: #B08E45;
    --accent-light: rgba(201, 165, 92, 0.14);
    --bg: #F6F7F9;
    --white: #FFFFFF;
    --heading: #1F2A37;
    --body: #374151;
    --muted: #6B7280;
    --border: #E5E7EB;
    --radius-lg: 16px;
    --radius-md: 12px;
    --radius-pill: 999px;
    --radius-sm: 6px;
    --shadow: 0 1px 3px rgba(31, 42, 55, 0.04), 0 8px 24px rgba(31, 42, 55, 0.06);
    --shadow-hover: 0 2px 6px rgba(31, 42, 55, 0.06), 0 16px 32px rgba(31, 42, 55, 0.10);
    --container: 1200px;
    --gap: 24px;
    --transition: all 0.3s ease;
}

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
    font-family: "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", sans-serif;
    font-size: 16px;
    line-height: 1.8;
    color: var(--body);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; height: auto; }
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-dark); }
ul, ol { list-style: none; }

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

::selection { background: var(--primary-light); color: var(--primary-dark); }

:focus-visible {
    outline: 3px solid rgba(28, 100, 163, 0.35);
    outline-offset: 2px;
    border-radius: 4px;
}

/* ===== Header ===== */
.site-header {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1000;
    width: calc(100% - 40px);
    max-width: 1160px;
}

.nav-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: var(--radius-pill);
    padding: 10px 18px 10px 24px;
    box-shadow: 0 1px 3px rgba(31, 42, 55, 0.05), 0 8px 24px rgba(31, 42, 55, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.6);
    transition: var(--transition);
}

.site-header.scrolled .nav-wrapper {
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 6px rgba(31, 42, 55, 0.06), 0 16px 32px rgba(31, 42, 55, 0.10);
    border-color: var(--border);
}

.logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
    color: var(--heading);
    font-size: 18px;
    font-weight: 700;
    white-space: nowrap;
}

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

.logo-icon {
    width: 32px;
    height: 32px;
    border-radius: 10px;
    background: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.logo-icon::after {
    content: "";
    position: absolute;
    top: 6px;
    right: 6px;
    width: 10px;
    height: 10px;
    border: 2px solid rgba(255, 255, 255, 0.6);
    border-radius: 50%;
}

.logo-icon-dot {
    width: 8px;
    height: 8px;
    background: var(--accent);
    border-radius: 50%;
    position: relative;
    z-index: 1;
}

.logo-text { letter-spacing: 0.5px; }
.logo-text em {
    font-style: normal;
    color: var(--primary);
    font-weight: 600;
    margin-left: 2px;
    font-size: 15px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 4px;
    margin: 0 12px;
}

.nav-links a {
    padding: 8px 18px;
    border-radius: var(--radius-pill);
    color: var(--body);
    font-size: 14px;
    font-weight: 500;
    line-height: 1.4;
    transition: var(--transition);
    white-space: nowrap;
}

.nav-links a:hover { background: var(--primary-light); color: var(--primary); }
.nav-links a.active { background: var(--primary); color: #fff; }
.nav-links a.active:hover { background: var(--primary-dark); color: #fff; }

.nav-cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: var(--accent);
    color: #fff;
    font-size: 14px;
    font-weight: 600;
    padding: 10px 24px;
    border-radius: var(--radius-pill);
    white-space: nowrap;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    line-height: 1.4;
}

.nav-cta:hover {
    background: var(--accent-dark);
    color: #fff;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(176, 142, 69, 0.3);
}

.nav-cta:active { transform: translateY(0); box-shadow: none; }

.nav-cta-mobile { display: none !important; }

.menu-toggle {
    display: none;
    width: 42px;
    height: 42px;
    border: none;
    background: transparent;
    border-radius: 50%;
    cursor: pointer;
    position: relative;
    padding: 0;
    flex-shrink: 0;
}

.menu-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--heading);
    margin: 0 auto;
    position: relative;
    transition: var(--transition);
    border-radius: 2px;
}

.menu-toggle span::before,
.menu-toggle span::after {
    content: "";
    position: absolute;
    left: 0;
    width: 20px;
    height: 2px;
    background: var(--heading);
    border-radius: 2px;
    transition: var(--transition);
}

.menu-toggle span::before { top: -6px; }
.menu-toggle span::after { top: 6px; }

.menu-toggle.open span { background: transparent; }
.menu-toggle.open span::before { top: 0; transform: rotate(45deg); }
.menu-toggle.open span::after { top: 0; transform: rotate(-45deg); }

/* ===== Hero ===== */
.page-hero {
    padding: 150px 0 80px;
    background: linear-gradient(135deg, rgba(28, 100, 163, 0.04), rgba(246, 247, 249, 0) 60%);
    position: relative;
    overflow: hidden;
    border-bottom: 1px solid var(--border);
}

.page-hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background: url('/assets/images/backpic/back-2.webp') center 20% / cover no-repeat;
    opacity: 0.12;
    z-index: 0;
}

.page-hero .container {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    border: 1px solid var(--accent);
    color: var(--accent-dark);
    font-size: 13px;
    font-weight: 600;
    padding: 6px 18px;
    border-radius: var(--radius-pill);
    background: rgba(255, 255, 255, 0.7);
    margin-bottom: 24px;
    letter-spacing: 1px;
}

.hero-badge::before {
    content: "";
    width: 6px;
    height: 6px;
    background: var(--accent);
    border-radius: 50%;
    display: inline-block;
}

.page-hero h1 {
    font-size: 42px;
    font-weight: 800;
    line-height: 1.4;
    color: var(--heading);
    margin-bottom: 20px;
    max-width: 800px;
}

.page-hero h1 .highlight {
    color: var(--primary);
    position: relative;
    white-space: nowrap;
}

.page-hero .hero-sub {
    font-size: 17px;
    color: var(--muted);
    max-width: 660px;
    line-height: 1.8;
    margin-bottom: 36px;
}

.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; justify-content: center; }

.btn { display: inline-flex; align-items: center; justify-content: center; border-radius: var(--radius-pill); font-size: 15px; font-weight: 600; padding: 13px 32px; transition: var(--transition); cursor: pointer; border: none; line-height: 1.4; }
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dark); color: #fff; transform: translateY(-2px); box-shadow: 0 6px 16px rgba(176, 142, 69, 0.3); }
.btn-primary:active { transform: translateY(0); box-shadow: none; }
.btn-secondary { background: var(--white); color: var(--primary); border: 1.5px solid var(--primary); }
.btn-secondary:hover { background: var(--primary-light); color: var(--primary-dark); transform: translateY(-2px); box-shadow: var(--shadow); }
.btn-secondary:active { transform: translateY(0); box-shadow: none; }

/* ===== Index Cards ===== */
.index-section {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 48px;
}

.section-header .section-tag {
    display: inline-block;
    font-size: 13px;
    color: var(--primary);
    background: var(--primary-light);
    padding: 4px 14px;
    border-radius: var(--radius-pill);
    margin-bottom: 12px;
    font-weight: 500;
    letter-spacing: 1px;
}

.section-header h2 {
    font-size: 32px;
    font-weight: 800;
    color: var(--heading);
    line-height: 1.4;
    margin-bottom: 12px;
}

.section-header p { color: var(--muted); font-size: 15px; max-width: 560px; margin: 0 auto; }

.index-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.index-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 32px 28px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    transition: var(--transition);
    display: flex;
    gap: 20px;
    position: relative;
    overflow: hidden;
}

.index-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
    border-color: rgba(28, 100, 163, 0.3);
}

.index-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, var(--primary), var(--accent));
    opacity: 0.7;
}

.index-card-num {
    font-size: 32px;
    font-weight: 800;
    color: var(--primary-light);
    line-height: 1;
    font-family: "SF Mono", "Cascadia Mono", Consolas, monospace;
    min-width: 56px;
}

.index-card-body { flex: 1; }

.index-card-body h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--heading);
    margin-bottom: 8px;
    line-height: 1.4;
}

.index-card-body p {
    font-size: 14px;
    color: var(--muted);
    line-height: 1.7;
    margin-bottom: 16px;
}

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

.card-link::after {
    content: "→";
    transition: transform 0.3s ease;
    font-size: 16px;
}

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

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

/* ===== Feature Showcase ===== */
.feature-showcase {
    padding: 80px 0;
    background: var(--white);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
}

.showcase-inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.showcase-image {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.showcase-image img { width: 100%; height: 380px; object-fit: cover; }

.showcase-content h2 {
    font-size: 28px;
    font-weight: 800;
    color: var(--heading);
    line-height: 1.4;
    margin-bottom: 16px;
}

.showcase-content > p {
    color: var(--muted);
    font-size: 15px;
    line-height: 1.8;
    margin-bottom: 28px;
}

.showcase-list { display: flex; flex-direction: column; gap: 20px; }

.showcase-list li { display: flex; gap: 14px; align-items: flex-start; }

.showcase-check {
    width: 24px;
    height: 24px;
    background: var(--primary-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    margin-top: 2px;
}

.showcase-check svg { width: 13px; height: 13px; fill: var(--primary); }

.showcase-list h4 {
    font-size: 16px;
    font-weight: 600;
    color: var(--heading);
    margin-bottom: 4px;
}

.showcase-list p { font-size: 14px; color: var(--muted); line-height: 1.7; }

/* ===== Related Docs ===== */
.docs-section {
    padding: 80px 0;
}

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

.doc-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 28px 24px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.doc-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
    border-color: rgba(28, 100, 163, 0.3);
}

.doc-card-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    background: var(--accent-light);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
}

.doc-card-icon svg { width: 24px; height: 24px; fill: var(--accent); }

.doc-card h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--heading);
    margin-bottom: 8px;
}

.doc-card p {
    font-size: 14px;
    color: var(--muted);
    line-height: 1.7;
    margin-bottom: 16px;
    flex: 1;
}

/* ===== CTA ===== */
.cta-section {
    padding: 56px 0 80px;
}

.cta-box {
    background: var(--primary-light);
    border: 1px solid rgba(28, 100, 163, 0.2);
    border-radius: var(--radius-lg);
    padding: 56px 48px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-box::before {
    content: "";
    position: absolute;
    width: 200px;
    height: 200px;
    background: rgba(28, 100, 163, 0.05);
    border-radius: 50%;
    top: -80px;
    right: -60px;
}

.cta-box h2 {
    font-size: 28px;
    font-weight: 800;
    color: var(--heading);
    margin-bottom: 12px;
    line-height: 1.4;
}

.cta-box p {
    color: var(--muted);
    font-size: 15px;
    max-width: 480px;
    margin: 0 auto 28px;
    line-height: 1.8;
}

.cta-box .btn { min-width: 180px; }

/* ===== Footer ===== */
.site-footer {
    background: var(--white);
    border-top: 1px solid var(--border);
    padding: 60px 0 32px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1.2fr;
    gap: 48px;
    margin-bottom: 40px;
}

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

.footer-brand p {
    font-size: 14px;
    color: var(--muted);
    line-height: 1.8;
    max-width: 320px;
}

.footer-col h4 {
    font-size: 15px;
    font-weight: 700;
    color: var(--heading);
    margin-bottom: 16px;
    line-height: 1.4;
}

.footer-col ul li {
    margin-bottom: 10px;
    font-size: 14px;
    color: var(--muted);
    line-height: 1.7;
}

.footer-col ul li a { color: var(--muted); }
.footer-col ul li a:hover { color: var(--primary); }

.footer-copyright {
    border-top: 1px solid var(--border);
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 13px;
    color: var(--muted);
}

.footer-copyright .domain {
    font-family: "SF Mono", "Cascadia Mono", Consolas, monospace;
    color: var(--muted);
    font-size: 13px;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .nav-links { margin: 0 8px; }
    .nav-links a { padding: 8px 12px; font-size: 13px; }
    .nav-cta { padding: 9px 18px; font-size: 13px; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .index-card { padding: 24px 20px; }
}

@media (max-width: 768px) {
    .site-header { top: 12px; width: calc(100% - 24px); }
    .nav-wrapper { border-radius: var(--radius-pill); padding: 8px 12px 8px 16px; }
    .nav-cta { display: none; }
    .menu-toggle { display: flex; align-items: center; justify-content: center; }
    .nav-links {
        display: none;
        position: absolute;
        top: calc(100% + 8px);
        left: 0;
        right: 0;
        background: var(--white);
        border-radius: 16px;
        flex-direction: column;
        padding: 12px;
        gap: 4px;
        box-shadow: var(--shadow-hover);
        border: 1px solid var(--border);
        z-index: 999;
    }
    .nav-links.open { display: flex; }
    .nav-links a {
        padding: 13px 20px;
        width: 100%;
        text-align: center;
        font-size: 15px;
        border-radius: 10px;
    }
    .nav-links a.active { background: var(--primary); color: #fff; }
    .page-hero { padding: 120px 0 60px; }
    .page-hero h1 { font-size: 30px; }
    .page-hero h1 .highlight { white-space: normal; }
    .hero-sub { font-size: 15px; }
    .section-header h2 { font-size: 26px; }
    .index-grid { grid-template-columns: 1fr; }
    .showcase-inner { grid-template-columns: 1fr; gap: 32px; }
    .showcase-image img { height: 260px; }
    .docs-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .footer-copyright { flex-direction: column; text-align: center; }
    .cta-box { padding: 40px 24px; }
    .cta-box h2 { font-size: 24px; }
    .index-section, .docs-section, .feature-showcase, .cta-section { padding: 56px 0; }
}

@media (max-width: 520px) {
    .container { padding: 0 16px; }
    .page-hero h1 { font-size: 26px; }
    .hero-badge { font-size: 12px; padding: 5px 14px; }
    .hero-actions { flex-direction: column; width: 100%; }
    .hero-actions .btn { width: 100%; }
    .index-card { flex-direction: column; gap: 14px; padding: 24px 18px; }
    .index-card-num { min-width: auto; font-size: 24px; }
    .showcase-image img { height: 200px; }
    .cta-box .btn { width: 100%; }
}

/* roulang page: article */
/* ===== Reset / Base ===== */
  *,
  *::before,
  *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
  }
  html {
    scroll-behavior: smooth;
  }
  body {
    font-family: "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", sans-serif;
    font-size: 16px;
    line-height: 1.8;
    color: #374151;
    background: #F6F7F9;
    -webkit-font-smoothing: antialiased;
    padding-bottom: 80px;
  }
  img {
    max-width: 100%;
    display: block;
  }
  a {
    color: #1C64A3;
    text-decoration: none;
    transition: color .2s ease;
  }
  a:hover {
    color: #155187;
  }
  button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
  }
  a:focus-visible,
  button:focus-visible {
    outline: 3px solid rgba(28, 100, 163, 0.35);
    outline-offset: 2px;
  }
  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
  }

  /* ===== Variables ===== */
  :root {
    --primary: #1C64A3;
    --primary-dark: #155187;
    --primary-light: rgba(28, 100, 163, 0.08);
    --accent: #C9A55C;
    --accent-hover: #b8954f;
    --bg: #F6F7F9;
    --card-bg: #FFFFFF;
    --text: #1F2A37;
    --text-body: #374151;
    --text-muted: #6B7280;
    --border: #E5E7EB;
    --radius-lg: 16px;
    --radius-md: 12px;
    --radius-sm: 6px;
    --shadow: 0 1px 3px rgba(31, 42, 55, 0.04), 0 8px 24px rgba(31, 42, 55, 0.06);
    --shadow-hover: 0 2px 6px rgba(31, 42, 55, 0.06), 0 16px 32px rgba(31, 42, 55, 0.10);
  }

  /* ===== Navigation ===== */
  .site-header {
    position: sticky;
    top: 16px;
    z-index: 1000;
    display: flex;
    justify-content: center;
    padding: 0 16px;
  }
  .nav-wrapper {
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-radius: 999px;
    padding: 8px 12px 8px 20px;
    box-shadow: var(--shadow);
    border: 1px solid rgba(255, 255, 255, 0.6);
    max-width: 1080px;
    width: 100%;
    transition: box-shadow .3s, background .3s;
  }
  .site-header.scrolled .nav-wrapper {
    background: rgba(255, 255, 255, 0.96);
    box-shadow: var(--shadow-hover);
    border-color: var(--border);
  }
  .logo {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    white-space: nowrap;
    flex-shrink: 0;
  }
  .logo-icon {
    width: 34px;
    height: 34px;
    border-radius: 10px;
    background: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
  }
  .logo-icon-dot {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 0 4px rgba(255, 255, 255, 0.25);
  }
  .logo-text {
    font-size: 18px;
    font-weight: 700;
    color: var(--text);
    letter-spacing: .02em;
  }
  .logo-text em {
    font-style: normal;
    color: var(--accent);
    font-weight: 600;
    margin-left: 2px;
  }
  .nav-links {
    display: flex;
    align-items: center;
    gap: 4px;
    margin-left: auto;
  }
  .nav-links a {
    display: inline-flex;
    align-items: center;
    padding: 8px 14px;
    border-radius: 999px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-body);
    transition: background .2s, color .2s, box-shadow .2s;
  }
  .nav-links a:hover {
    color: var(--primary);
    background: var(--primary-light);
  }
  .nav-links a.active {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 4px 12px rgba(28, 100, 163, 0.25);
  }
  .nav-cta {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 40px;
    padding: 0 20px;
    border-radius: 999px;
    background: var(--accent);
    color: #fff;
    font-size: 14px;
    font-weight: 600;
    border: none;
    transition: background .2s, box-shadow .2s, transform .2s;
    margin-left: 4px;
    white-space: nowrap;
  }
  .nav-cta:hover {
    background: var(--accent-hover);
    color: #fff;
    box-shadow: 0 6px 16px rgba(201, 165, 92, 0.3);
  }
  .nav-cta:active {
    transform: translateY(1px);
  }
  .menu-toggle {
    display: none;
    width: 42px;
    height: 42px;
    border-radius: 50%;
    border: 1px solid var(--border);
    background: #fff;
    align-items: center;
    justify-content: center;
    position: relative;
    z-index: 1001;
  }
  .menu-toggle span,
  .menu-toggle span::before,
  .menu-toggle span::after {
    content: '';
    display: block;
    width: 18px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: transform .3s;
  }
  .menu-toggle span {
    position: relative;
  }
  .menu-toggle span::before {
    position: absolute;
    top: -6px;
    left: 0;
  }
  .menu-toggle span::after {
    position: absolute;
    top: 6px;
    left: 0;
  }
  body.menu-open .menu-toggle span {
    background: transparent;
  }
  body.menu-open .menu-toggle span::before {
    transform: rotate(45deg);
    top: 0;
  }
  body.menu-open .menu-toggle span::after {
    transform: rotate(-45deg);
    top: 0;
  }
  .nav-cta-mobile {
    display: none !important;
  }

  /* ===== Article Hero ===== */
  .article-hero {
    position: relative;
    padding: 64px 0 40px;
    text-align: center;
  }
  .article-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
      radial-gradient(ellipse at 20% 20%, rgba(28, 100, 163, 0.06) 0%, transparent 55%),
      radial-gradient(ellipse at 80% 40%, rgba(201, 165, 92, 0.07) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
  }
  .article-hero .container {
    position: relative;
    z-index: 1;
    max-width: 860px;
  }
  .breadcrumb {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 8px;
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 20px;
  }
  .breadcrumb a {
    color: var(--primary);
  }
  .breadcrumb a:hover {
    text-decoration: underline;
  }
  .breadcrumb .sep {
    color: #9CA3AF;
  }
  .breadcrumb .current {
    color: var(--text-muted);
    max-width: 240px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }
  .article-hero h1 {
    font-size: 38px;
    line-height: 1.3;
    font-weight: 800;
    color: var(--text);
    letter-spacing: -0.01em;
    margin-bottom: 20px;
  }
  .article-meta {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 12px 20px;
    font-size: 14px;
    color: var(--text-muted);
  }
  .meta-tag {
    background: rgba(201, 165, 92, 0.12);
    color: #8a6d3b;
    border: 1px solid rgba(201, 165, 92, 0.3);
    padding: 3px 12px;
    border-radius: 999px;
    font-size: 13px;
    font-weight: 500;
  }
  .meta-divider {
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: #D1D5DB;
    display: inline-block;
  }
  .meta-read {
    display: inline-flex;
    align-items: center;
    gap: 6px;
  }
  .meta-read svg {
    opacity: .55;
  }

  /* ===== Article Body ===== */
  .article-section {
    padding: 16px 0 32px;
  }
  .article-content {
    max-width: 720px;
    margin: 0 auto;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    padding: 48px 56px;
  }
  .article-content p {
    margin-bottom: 28px;
    line-height: 1.9;
    font-size: 16px;
    color: var(--text-body);
  }
  .article-content h2 {
    font-size: 26px;
    font-weight: 700;
    color: var(--text);
    margin: 48px 0 20px;
    padding-left: 14px;
    border-left: 4px solid var(--primary);
    line-height: 1.4;
  }
  .article-content h3 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text);
    margin: 36px 0 16px;
    line-height: 1.5;
  }
  .article-content ul,
  .article-content ol {
    margin: 0 0 28px;
    padding-left: 24px;
  }
  .article-content li {
    margin-bottom: 10px;
  }
  .article-content a {
    color: var(--primary);
    text-decoration: underline;
    text-underline-offset: 3px;
  }
  .article-content a:hover {
    color: var(--primary-dark);
  }
  .article-content blockquote {
    border-left: 4px solid var(--primary);
    background: var(--primary-light);
    padding: 20px 24px;
    margin: 32px 0;
    border-radius: 0 12px 12px 0;
    color: var(--text-body);
    font-size: 15px;
  }
  .article-content img {
    border-radius: 12px;
    margin: 24px 0;
    border: 1px solid var(--border);
  }
  .article-content figure {
    margin: 24px 0;
  }
  .article-content figcaption {
    font-size: 13px;
    color: var(--text-muted);
    text-align: center;
    margin-top: 8px;
  }
  .article-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 28px 0;
    font-size: 15px;
    border: 1px solid var(--border);
    border-radius: 12px;
    overflow: hidden;
  }
  .article-content th,
  .article-content td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
    text-align: left;
  }
  .article-content th {
    background: #F8FAFC;
    font-weight: 600;
    color: var(--text);
  }
  .article-content tr:last-child td {
    border-bottom: none;
  }
  .article-content code {
    font-family: ui-monospace, SFMono-Regular, Consolas, "Liberation Mono", monospace;
    font-size: 14px;
    background: #F3F4F6;
    padding: 2px 8px;
    border-radius: 6px;
    color: #BE185D;
  }
  .article-content pre {
    background: #1F2A37;
    color: #F9FAFB;
    padding: 24px;
    border-radius: 12px;
    overflow-x: auto;
    margin: 28px 0;
    line-height: 1.7;
    font-size: 14px;
  }
  .article-content pre code {
    background: transparent;
    color: inherit;
    padding: 0;
    font-size: inherit;
  }

  /* ===== Article tags / prev-next / back ===== */
  .article-tags {
    max-width: 720px;
    margin: 24px auto 0;
    display: flex;
    gap: 8px;
    justify-content: center;
    flex-wrap: wrap;
  }
  .tag {
    display: inline-flex;
    align-items: center;
    padding: 5px 14px;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 999px;
    font-size: 13px;
    color: var(--text-muted);
    transition: all .2s;
  }
  .tag:hover {
    border-color: var(--primary);
    color: var(--primary);
  }
  .article-prev-next {
    max-width: 720px;
    margin: 32px auto 0;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }
  .pn-link {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 20px 24px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    transition: all .25s;
    color: var(--text-body);
  }
  .pn-link:hover {
    border-color: rgba(28, 100, 163, 0.35);
    box-shadow: var(--shadow-hover);
    transform: translateY(-2px);
    color: var(--text-body);
  }
  .pn-label {
    font-size: 13px;
    color: var(--text-muted);
  }
  .pn-title {
    font-size: 15px;
    font-weight: 600;
    color: var(--text);
  }
  .pn-link:hover .pn-title {
    color: var(--primary);
  }
  .article-back {
    max-width: 720px;
    margin: 24px auto 0;
    text-align: center;
  }

  /* ===== Not found ===== */
  .not-found {
    max-width: 720px;
    margin: 0 auto;
    background: #fff;
    border: 1px dashed var(--border);
    border-radius: var(--radius-lg);
    padding: 80px 40px;
    text-align: center;
  }
  .not-found .nf-icon {
    width: 72px;
    height: 72px;
    border-radius: 50%;
    background: var(--primary-light);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 32px;
    margin: 0 auto 20px;
  }
  .not-found p {
    color: var(--text-muted);
    margin-bottom: 24px;
  }

  /* ===== Buttons ===== */
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    height: 48px;
    padding: 0 28px;
    border-radius: 999px;
    font-size: 15px;
    font-weight: 600;
    border: none;
    transition: all .25s;
  }
  .btn-primary {
    background: var(--accent);
    color: #fff;
  }
  .btn-primary:hover {
    background: var(--accent-hover);
    color: #fff;
    box-shadow: 0 8px 20px rgba(201, 165, 92, 0.3);
    transform: translateY(-2px);
  }
  .btn-primary:active {
    transform: translateY(0);
  }
  .btn-outline {
    background: #fff;
    border: 1.5px solid var(--primary);
    color: var(--primary);
  }
  .btn-outline:hover {
    background: var(--primary-light);
    color: var(--primary);
    border-color: var(--primary);
  }

  /* ===== Related ===== */
  .related-section {
    padding: 64px 0 48px;
  }
  .related-section .container {
    max-width: 1080px;
  }
  .section-label {
    text-align: center;
    font-size: 26px;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 32px;
  }
  .related-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }
  .related-card {
    background: #fff;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    transition: all .25s;
  }
  .related-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-4px);
    border-color: rgba(28, 100, 163, 0.25);
  }
  .related-card .rc-thumb {
    width: 100%;
    height: 128px;
    border-radius: 12px;
    background-size: cover;
    background-position: center;
    background-color: #EEF2F6;
  }
  .related-card .rc-title {
    font-size: 17px;
    font-weight: 600;
    color: var(--text);
    line-height: 1.5;
    margin-top: 4px;
  }
  .related-card .rc-date {
    font-size: 13px;
    color: var(--text-muted);
  }
  .related-card .rc-link {
    font-size: 14px;
    color: var(--primary);
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    margin-top: auto;
  }
  .related-card .rc-link:hover {
    color: var(--primary-dark);
    text-decoration: underline;
  }

  /* ===== Footer ===== */
  .site-footer {
    background: #fff;
    border-top: 1px solid var(--border);
    padding: 56px 0 24px;
    margin-top: 48px;
  }
  .footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1.2fr;
    gap: 48px;
    margin-bottom: 40px;
  }
  .footer-brand .logo {
    margin-bottom: 16px;
  }
  .footer-brand p {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.9;
    max-width: 360px;
  }
  .footer-col h4 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 20px;
  }
  .footer-col ul {
    list-style: none;
  }
  .footer-col li {
    margin-bottom: 12px;
    font-size: 14px;
    color: var(--text-muted);
  }
  .footer-col a {
    color: var(--text-muted);
    transition: color .2s;
  }
  .footer-col a:hover {
    color: var(--primary);
  }
  .footer-copyright {
    border-top: 1px solid var(--border);
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    font-size: 13px;
    color: var(--text-muted);
  }

  /* ===== Bottom CTA bar ===== */
  .bottom-cta {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    height: 64px;
    background: #fff;
    border-top: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 24px;
    z-index: 999;
    padding: 0 56px 0 20px;
  }
  .bottom-cta-text {
    font-size: 15px;
    font-weight: 500;
    color: var(--text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
  }
  .bottom-cta .btn {
    height: 40px;
    padding: 0 22px;
    font-size: 14px;
    flex-shrink: 0;
  }
  .bottom-cta-close {
    position: absolute;
    right: 14px;
    top: 50%;
    transform: translateY(-50%);
    width: 32px;
    height: 32px;
    border-radius: 50%;
    color: var(--text-muted);
    font-size: 18px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background .2s;
  }
  .bottom-cta-close:hover {
    background: #F3F4F6;
    color: var(--text);
  }

  /* ===== Responsive ===== */
  @media (max-width: 992px) {
    .related-grid {
      grid-template-columns: repeat(2, 1fr);
    }
    .footer-grid {
      grid-template-columns: 1fr 1fr;
    }
  }
  @media (max-width: 768px) {
    .container {
      padding: 0 20px;
    }
    .menu-toggle {
      display: flex;
    }
    .nav-cta {
      display: none;
    }
    .nav-links {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      flex-direction: column;
      align-items: flex-start;
      gap: 4px;
      background: #fff;
      padding: 96px 24px 32px;
      border-radius: 0 0 20px 20px;
      box-shadow: var(--shadow-hover);
      display: none;
      margin-left: 0;
    }
    .nav-links.open {
      display: flex;
    }
    .nav-links a {
      width: 100%;
      height: 48px;
      border-radius: 12px;
      font-size: 16px;
      padding: 0 16px;
    }
    .nav-cta-mobile {
      display: flex !important;
      width: 100%;
      height: 48px;
      margin-top: 12px;
      border-radius: 12px;
      align-items: center;
      justify-content: center;
      background: var(--accent);
      color: #fff;
      font-weight: 600;
    }
    .article-hero {
      padding: 40px 0 28px;
    }
    .article-hero h1 {
      font-size: 28px;
    }
    .article-content {
      padding: 32px 24px;
    }
    .article-content h2 {
      font-size: 22px;
    }
    .article-content h3 {
      font-size: 18px;
    }
    .article-prev-next {
      grid-template-columns: 1fr;
    }
    .related-grid {
      grid-template-columns: 1fr;
    }
    .footer-grid {
      grid-template-columns: 1fr;
      gap: 32px;
    }
    .footer-copyright {
      flex-direction: column;
      align-items: flex-start;
    }
    .bottom-cta-text {
      max-width: 55%;
      font-size: 14px;
    }
    .bottom-cta .btn {
      padding: 0 16px;
      font-size: 13px;
    }
  }
  @media (max-width: 520px) {
    .article-content {
      padding: 24px 16px;
    }
    .article-content table {
      display: block;
      overflow-x: auto;
    }
    .bottom-cta {
      gap: 12px;
      padding: 0 48px 0 16px;
    }
  }

/* roulang page: category3 */
:root {
            --primary: #1C64A3;
            --primary-light: rgba(28, 100, 163, 0.08);
            --primary-border: rgba(28, 100, 163, 0.28);
            --primary-soft: #EFF5FA;
            --accent: #C9A55C;
            --accent-hover: #D6B36C;
            --accent-soft: #F7F0E3;
            --bg: #F6F7F9;
            --white: #FFFFFF;
            --title: #1F2A37;
            --text: #374151;
            --muted: #6B7280;
            --border: #E5E7EB;
            --radius-sm: 10px;
            --radius: 16px;
            --radius-lg: 24px;
            --shadow: 0 1px 3px rgba(31, 42, 55, 0.04), 0 8px 24px rgba(31, 42, 55, 0.06);
            --shadow-hover: 0 2px 6px rgba(31, 42, 55, 0.06), 0 16px 32px rgba(31, 42, 55, 0.10);
            --container: 1200px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Source Han Sans SC", "Noto Sans CJK SC", sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.8;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

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

        a {
            color: var(--primary);
            text-decoration: none;
            transition: color .25s;
        }

        a:hover {
            color: var(--primary);
            text-decoration: underline;
        }

        ul,
        ol {
            list-style: none;
        }

        button,
        input {
            font-family: inherit;
        }

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

        /* ========== 悬浮胶囊导航 ========== */
        .site-header {
            position: sticky;
            top: 16px;
            z-index: 100;
            padding: 0 24px;
        }

        .nav-wrapper {
            max-width: 1160px;
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            background: rgba(255, 255, 255, 0.85);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border: 1px solid rgba(229, 231, 235, 0.8);
            border-radius: 999px;
            padding: 8px 20px 8px 12px;
            box-shadow: var(--shadow);
            transition: box-shadow .3s ease, background .3s ease;
        }

        .site-header.scrolled .nav-wrapper {
            background: rgba(255, 255, 255, 0.95);
            box-shadow: 0 2px 6px rgba(31, 42, 55, 0.06), 0 12px 28px rgba(31, 42, 55, 0.08);
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
            flex-shrink: 0;
        }

        .logo-icon {
            width: 40px;
            height: 40px;
            background: var(--primary);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            position: relative;
            overflow: hidden;
        }

        .logo-icon::after {
            content: "";
            position: absolute;
            width: 20px;
            height: 20px;
            background: var(--accent);
            border-radius: 6px;
            opacity: .85;
        }

        .logo-icon-dot {
            display: none;
        }

        .logo-text {
            font-size: 20px;
            font-weight: 700;
            color: var(--title);
            white-space: nowrap;
            letter-spacing: .5px;
        }

        .logo-text em {
            font-style: normal;
            color: var(--primary);
            font-weight: 600;
        }

        .nav-links {
            display: flex;
            align-items: center;
            gap: 2px;
        }

        .nav-links a {
            padding: 10px 20px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 500;
            color: var(--text);
            text-decoration: none;
            transition: background .25s, color .25s;
            white-space: nowrap;
        }

        .nav-links a:hover {
            background: var(--primary-light);
            color: var(--primary);
            text-decoration: none;
        }

        .nav-links a.active {
            background: var(--primary);
            color: #fff;
        }

        .nav-cta {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            background: var(--accent);
            color: #fff;
            border: none;
            border-radius: 999px;
            padding: 10px 26px;
            font-size: 14px;
            font-weight: 600;
            cursor: pointer;
            transition: background .25s, transform .15s, box-shadow .25s;
            text-decoration: none;
            white-space: nowrap;
        }

        .nav-cta:hover {
            background: var(--accent-hover);
            color: #fff;
            text-decoration: none;
            box-shadow: 0 4px 14px rgba(201, 165, 92, 0.35);
            transform: translateY(-1px);
        }

        .nav-cta:active {
            transform: translateY(1px);
            box-shadow: none;
        }

        .nav-cta:focus-visible,
        .menu-toggle:focus-visible,
        .btn:focus-visible {
            outline: 3px solid rgba(28, 100, 163, 0.35);
            outline-offset: 2px;
        }

        .menu-toggle {
            display: none;
            width: 44px;
            height: 44px;
            background: none;
            border: 1px solid var(--border);
            border-radius: 12px;
            cursor: pointer;
            position: relative;
            flex-shrink: 0;
            transition: border-color .25s, background .25s;
        }

        .menu-toggle:hover {
            border-color: var(--primary);
            background: var(--primary-light);
        }

        .menu-toggle span,
        .menu-toggle span::before,
        .menu-toggle span::after {
            content: "";
            position: absolute;
            left: 12px;
            right: 12px;
            height: 2px;
            background: var(--title);
            border-radius: 2px;
            transition: all .3s;
        }

        .menu-toggle span {
            top: 50%;
            transform: translateY(-50%);
        }

        .menu-toggle span::before {
            top: -7px;
        }

        .menu-toggle span::after {
            top: 7px;
        }

        .menu-toggle.active span {
            background: transparent;
        }

        .menu-toggle.active span::before {
            transform: rotate(45deg);
            top: 0;
        }

        .menu-toggle.active span::after {
            transform: rotate(-45deg);
            top: 0;
        }

        /* ========== 按钮系统 ========== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border-radius: 999px;
            font-size: 15px;
            font-weight: 600;
            padding: 12px 30px;
            transition: all .25s ease;
            cursor: pointer;
            text-decoration: none;
            border: none;
            line-height: 1.4;
        }

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

        .btn-primary:hover {
            background: var(--accent-hover);
            box-shadow: 0 6px 18px rgba(201, 165, 92, 0.35);
            transform: translateY(-2px);
            text-decoration: none;
            color: #fff !important;
        }

        .btn-primary:active {
            transform: translateY(0);
            box-shadow: 0 2px 6px rgba(201, 165, 92, 0.3);
        }

        .btn-outline {
            background: var(--white);
            color: var(--primary) !important;
            border: 1.5px solid var(--primary);
        }

        .btn-outline:hover {
            background: var(--primary-light);
            text-decoration: none;
            transform: translateY(-2px);
            box-shadow: 0 4px 12px rgba(28, 100, 163, 0.12);
        }

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

        .btn-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 15px;
            font-weight: 600;
            color: var(--primary);
            text-decoration: none;
            padding: 8px 0;
            transition: gap .25s;
        }

        .btn-link:hover {
            gap: 12px;
            color: var(--primary);
            text-decoration: none;
        }

        /* ========== 页面顶部条带 ========== */
        .page-banner {
            position: relative;
            padding: 110px 0 90px;
            background: linear-gradient(135deg, rgba(239, 245, 250, 0.95), rgba(255, 255, 255, 0.90)), url('/assets/images/backpic/back-3.webp') center / cover no-repeat;
            border-radius: 0 0 36px 36px;
            text-align: center;
        }

        .banner-badge {
            display: inline-block;
            background: var(--accent-soft);
            color: #8A6D2F;
            border: 1px solid rgba(201, 165, 92, 0.4);
            border-radius: 6px;
            padding: 5px 16px;
            font-size: 13px;
            font-weight: 600;
            letter-spacing: 1px;
            margin-bottom: 24px;
        }

        .page-banner h1 {
            font-size: 44px;
            line-height: 1.35;
            color: var(--title);
            font-weight: 700;
            margin-bottom: 20px;
            letter-spacing: 1px;
        }

        .page-banner h1 span {
            color: var(--primary);
        }

        .page-banner p {
            font-size: 17px;
            color: var(--text);
            max-width: 720px;
            margin: 0 auto;
            line-height: 1.9;
        }

        /* ========== 资源卡片区 ========== */
        .resource-section {
            padding: 90px 0 80px;
        }

        .section-head {
            text-align: center;
            margin-bottom: 52px;
        }

        .section-tag {
            display: inline-block;
            border: 1px solid var(--primary-border);
            color: var(--primary);
            background: var(--primary-light);
            border-radius: 6px;
            padding: 4px 16px;
            font-size: 13px;
            font-weight: 600;
            margin-bottom: 16px;
            letter-spacing: 1px;
        }

        .section-head h2 {
            font-size: 32px;
            color: var(--title);
            margin-bottom: 12px;
            line-height: 1.4;
        }

        .section-head p {
            color: var(--muted);
            font-size: 16px;
            max-width: 560px;
            margin: 0 auto;
        }

        .resource-stack {
            display: flex;
            flex-direction: column;
            gap: 32px;
        }

        .resource-card {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 40px;
            display: grid;
            grid-template-columns: 72px 1fr 280px;
            gap: 36px;
            align-items: center;
            box-shadow: var(--shadow);
            transition: box-shadow .3s ease, transform .3s ease, border-color .3s ease;
        }

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

        .resource-icon {
            width: 64px;
            height: 64px;
            background: var(--primary-light);
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: var(--primary);
            font-size: 26px;
            transition: background .3s, color .3s, transform .3s;
        }

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

        .resource-body h3 {
            font-size: 23px;
            color: var(--title);
            margin-bottom: 12px;
            line-height: 1.4;
        }

        .resource-body p {
            color: var(--muted);
            font-size: 15px;
            line-height: 1.85;
            margin-bottom: 18px;
            max-width: 560px;
        }

        .resource-body ul {
            display: flex;
            flex-direction: column;
            gap: 7px;
        }

        .resource-body ul li {
            position: relative;
            padding-left: 22px;
            color: var(--text);
            font-size: 14px;
            line-height: 1.7;
        }

        .resource-body ul li::before {
            content: "";
            position: absolute;
            left: 0;
            top: 10px;
            width: 8px;
            height: 8px;
            background: var(--accent);
            border-radius: 50%;
        }

        .resource-img {
            display: flex;
            flex-direction: column;
            gap: 16px;
            align-items: stretch;
        }

        .resource-img img {
            width: 100%;
            height: 150px;
            object-fit: cover;
            border-radius: 14px;
            box-shadow: 0 2px 8px rgba(31, 42, 55, 0.06);
        }

        .resource-img .btn {
            justify-content: center;
        }

        /* ========== 数据指标区 ========== */
        .stats-section {
            padding: 70px 0;
            background: var(--white);
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 40px;
            text-align: center;
        }

        .stat-item {
            position: relative;
            padding: 8px 16px;
        }

        .stat-item + .stat-item::before {
            content: "";
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 1px;
            height: 56px;
            background: var(--border);
        }

        .stat-num {
            font-size: 48px;
            font-weight: 700;
            color: var(--primary);
            font-variant-numeric: tabular-nums;
            line-height: 1.2;
            letter-spacing: -1px;
        }

        .stat-num span {
            font-size: 20px;
            font-weight: 600;
            margin-left: 2px;
        }

        .stat-label {
            color: var(--muted);
            font-size: 15px;
            margin-top: 8px;
            line-height: 1.5;
        }

        /* ========== FAQ区 ========== */
        .page-faq {
            padding: 90px 0 80px;
        }

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

        .faq-item {
            background: var(--white);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            margin-bottom: 16px;
            overflow: hidden;
            transition: box-shadow .25s ease, border-color .25s ease;
        }

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

        .faq-item summary {
            padding: 22px 52px 22px 28px;
            font-size: 16px;
            font-weight: 600;
            color: var(--title);
            cursor: pointer;
            list-style: none;
            position: relative;
            line-height: 1.6;
            transition: color .25s;
        }

        .faq-item summary::-webkit-details-marker {
            display: none;
        }

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

        .faq-item summary::after {
            content: "+";
            position: absolute;
            right: 26px;
            top: 50%;
            transform: translateY(-50%);
            font-size: 24px;
            font-weight: 400;
            color: var(--primary);
            transition: transform .3s ease, color .3s ease;
            line-height: 1;
        }

        .faq-item[open] summary::after {
            transform: translateY(-50%) rotate(45deg);
            color: var(--accent);
        }

        .faq-item .faq-answer {
            padding: 0 28px 24px 28px;
            color: var(--muted);
            font-size: 15px;
            line-height: 1.85;
            border-top: 1px solid var(--border);
            margin: 0 28px 0 28px;
            padding: 16px 0 20px 0;
        }

        .faq-item .faq-answer p {
            max-width: 680px;
        }

        /* ========== CTA区 ========== */
        .cta-panel {
            padding: 40px 0 100px;
        }

        .cta-box {
            background: var(--primary-soft);
            border: 1px solid var(--primary-border);
            border-radius: var(--radius-lg);
            padding: 52px 60px;
            text-align: center;
        }

        .cta-box h2 {
            font-size: 28px;
            color: var(--title);
            margin-bottom: 12px;
            line-height: 1.4;
        }

        .cta-box p {
            color: var(--text);
            font-size: 16px;
            max-width: 520px;
            margin: 0 auto 30px;
            line-height: 1.8;
        }

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

        /* ========== 页脚 ========== */
        .site-footer {
            background: var(--white);
            border-top: 1px solid var(--border);
            padding: 64px 0 28px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr;
            gap: 48px;
            margin-bottom: 44px;
        }

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

        .footer-brand p {
            color: var(--muted);
            font-size: 14px;
            line-height: 1.8;
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 16px;
            color: var(--title);
            margin-bottom: 18px;
            font-weight: 600;
        }

        .footer-col ul li {
            margin-bottom: 11px;
            font-size: 14px;
            color: var(--muted);
            line-height: 1.6;
        }

        .footer-col ul li a {
            color: var(--muted);
            text-decoration: none;
            transition: color .25s;
        }

        .footer-col ul li a:hover {
            color: var(--primary);
        }

        .footer-copyright {
            border-top: 1px solid var(--border);
            padding-top: 26px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 13px;
            color: var(--muted);
        }

        .footer-copyright .domain {
            font-variant-numeric: tabular-nums;
        }

        /* ========== 响应式 ========== */
        @media (max-width: 1024px) {
            .resource-card {
                grid-template-columns: 64px 1fr;
                gap: 28px;
                padding: 32px;
            }

            .resource-img {
                grid-column: 1 / -1;
                flex-direction: row;
                align-items: center;
                gap: 20px;
            }

            .resource-img img {
                width: 55%;
                max-width: 320px;
                height: 130px;
                flex-shrink: 0;
            }

            .resource-img .btn {
                flex: 1;
            }

            .stats-grid {
                gap: 24px;
            }
        }

        @media (max-width: 768px) {
            .site-header {
                top: 12px;
                padding: 0 16px;
            }

            .nav-wrapper {
                padding: 8px 16px 8px 10px;
            }

            .nav-links {
                display: none;
                position: absolute;
                top: calc(100% + 12px);
                left: 0;
                right: 0;
                background: var(--white);
                border-radius: 20px;
                padding: 16px;
                flex-direction: column;
                align-items: stretch;
                box-shadow: var(--shadow-hover);
                border: 1px solid var(--border);
                gap: 4px;
            }

            .nav-links.open {
                display: flex;
            }

            .nav-links a {
                padding: 14px 18px;
                text-align: center;
                font-size: 15px;
            }

            .nav-cta {
                display: none;
            }

            .nav-links .nav-cta-mobile {
                display: inline-flex !important;
                justify-content: center;
                margin-top: 8px;
                background: var(--accent);
                color: #fff !important;
                border-radius: 999px;
                padding: 12px 24px;
                font-size: 15px;
                font-weight: 600;
                transition: background .25s, transform .15s;
            }

            .nav-links .nav-cta-mobile:hover {
                background: var(--accent-hover);
                transform: translateY(-1px);
            }

            .menu-toggle {
                display: block;
            }

            .page-banner {
                padding: 80px 0 60px;
                border-radius: 0 0 24px 24px;
            }

            .page-banner h1 {
                font-size: 30px;
                line-height: 1.4;
            }

            .page-banner p {
                font-size: 16px;
                padding: 0 8px;
            }

            .resource-section {
                padding: 64px 0 56px;
            }

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

            .resource-card {
                grid-template-columns: 1fr;
                gap: 20px;
                padding: 26px;
            }

            .resource-icon {
                width: 54px;
                height: 54px;
                font-size: 22px;
                border-radius: 14px;
            }

            .resource-body h3 {
                font-size: 20px;
            }

            .resource-body p {
                font-size: 14px;
            }

            .resource-img {
                flex-direction: column;
            }

            .resource-img img {
                width: 100%;
                max-width: none;
                height: 150px;
            }

            .resource-img .btn {
                width: 100%;
            }

            .stats-section {
                padding: 56px 0;
            }

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

            .stat-item + .stat-item::before {
                display: none;
            }

            .stat-num {
                font-size: 40px;
            }

            .page-faq {
                padding: 64px 0 56px;
            }

            .faq-item summary {
                padding: 18px 44px 18px 20px;
                font-size: 15px;
            }

            .faq-item .faq-answer {
                padding: 14px 0 18px 0;
                margin: 0 20px;
                font-size: 14px;
            }

            .cta-panel {
                padding: 24px 0 70px;
            }

            .cta-box {
                padding: 36px 24px;
                border-radius: 20px;
            }

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

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

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

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

            .footer-brand p {
                max-width: 100%;
            }

            .footer-copyright {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

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

            .logo-icon {
                width: 36px;
                height: 36px;
                border-radius: 10px;
            }

            .page-banner h1 {
                font-size: 26px;
            }

            .page-banner p {
                font-size: 15px;
            }

            .section-head h2 {
                font-size: 22px;
            }

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

            .resource-card {
                padding: 22px;
                border-radius: 18px;
            }

            .resource-card:hover {
                transform: none;
            }

            .resource-body ul li {
                font-size: 13px;
            }

            .faq-item summary {
                font-size: 14px;
                padding: 16px 40px 16px 16px;
            }

            .faq-item summary::after {
                right: 18px;
                font-size: 20px;
            }
        }