/* roulang page: index */
:root {
  --primary: #0f172a;
  --primary-light: #1e293b;
  --accent: #f59e0b;
  --accent-hover: #d97706;
  --accent-light: #fef3c7;
  --bg: #f8fafc;
  --surface: #ffffff;
  --text: #1e293b;
  --muted: #64748b;
  --border: #e2e8f0;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow-sm: 0 1px 3px rgba(15,23,42,.06);
  --shadow-md: 0 8px 24px rgba(15,23,42,.08);
  --shadow-lg: 0 16px 40px rgba(15,23,42,.12);
  --space-section: 96px;
  --container-w: 1200px;
  --transition: .25s ease;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button, input, textarea, select { font-family: inherit; }

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

/* Header */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 8px rgba(15,23,42,.04);
}
.header-inner {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 24px;
  height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 800;
  color: var(--primary);
  letter-spacing: -0.5px;
  white-space: nowrap;
}
.logo-icon {
  width: 38px;
  height: 38px;
  border-radius: 11px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 17px;
  font-weight: 900;
  flex-shrink: 0;
  box-shadow: 0 4px 12px rgba(15,23,42,.18);
}
.logo-text span { color: var(--accent); }
.nav {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 18px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  color: var(--muted);
  transition: all var(--transition);
  white-space: nowrap;
}
.nav-link:hover { color: var(--primary); background: #f1f5f9; }
.nav-link.active { color: var(--primary); background: var(--accent-light); }
.nav-cta-btn {
  padding: 10px 26px;
  border-radius: 999px;
  background: var(--primary);
  color: #fff;
  font-size: 14px;
  font-weight: 700;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  white-space: nowrap;
  box-shadow: 0 4px 14px rgba(15,23,42,.18);
}
.nav-cta-btn:hover {
  background: var(--accent);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(245,158,11,.32);
}
.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: none;
  background: var(--bg);
  border-radius: 10px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  cursor: pointer;
  transition: background var(--transition);
}
.menu-toggle:hover { background: #e2e8f0; }
.menu-toggle span {
  display: block;
  width: 20px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transition: all var(--transition);
}
.menu-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle.open span:nth-child(2) { opacity: 0; }
.menu-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* Hero */
.hero {
  position: relative;
  min-height: 640px;
  display: flex;
  align-items: center;
  background: url('/assets/images/backpic/back-1.png') center / cover no-repeat;
  isolation: isolate;
  padding: 72px 0;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(100deg, rgba(15,23,42,.94) 0%, rgba(15,23,42,.78) 45%, rgba(15,23,42,.38) 100%);
}
.hero .container { position: relative; z-index: 2; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,.12);
  border: 1px solid rgba(255,255,255,.25);
  color: #f8fafc;
  padding: 6px 16px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 20px;
  backdrop-filter: blur(4px);
}
.hero-badge i {
  font-style: normal;
  color: var(--accent);
}
.hero-title {
  font-size: 54px;
  line-height: 1.14;
  font-weight: 800;
  color: #fff;
  max-width: 660px;
  letter-spacing: -1px;
}
.hero-title span { color: var(--accent); }
.hero-subtitle {
  font-size: 18px;
  color: rgba(248,250,252,.82);
  max-width: 560px;
  margin: 20px 0 34px;
  line-height: 1.8;
}
.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 700;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  text-align: center;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 6px 20px rgba(245,158,11,.3);
}
.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 10px 28px rgba(245,158,11,.38);
}
.btn-outline {
  background: rgba(255,255,255,.06);
  color: #fff;
  border: 1px solid rgba(255,255,255,.4);
}
.btn-outline:hover {
  background: rgba(255,255,255,.16);
  transform: translateY(-2px);
  border-color: rgba(255,255,255,.65);
}
.hero-meta {
  margin-top: 48px;
  display: flex;
  gap: 36px;
  flex-wrap: wrap;
}
.hero-meta-item { color: #fff; }
.hero-meta-num {
  display: block;
  font-size: 28px;
  font-weight: 800;
  color: var(--accent);
  line-height: 1.2;
}
.hero-meta-label {
  font-size: 13px;
  color: rgba(248,250,252,.68);
}

/* Stats */
.stats-section {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  padding: 48px 0;
}
.stat-card {
  text-align: center;
  padding: 32px 20px;
  border-radius: var(--radius);
  background: var(--bg);
  border: 1px solid var(--border);
  transition: all var(--transition);
}
.stat-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: #cbd5e1;
}
.stat-number {
  font-size: 42px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.2;
  letter-spacing: -1px;
}
.stat-number span { color: var(--accent); }
.stat-label {
  margin-top: 6px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 600;
}

/* Section */
.section { padding: var(--space-section) 0; }
.section-alt { background: var(--surface); }
.section-head {
  max-width: 760px;
  margin-bottom: 48px;
}
.section-head.center {
  text-align: center;
  margin-left: auto;
  margin-right: auto;
}
.section-tag {
  display: inline-block;
  padding: 4px 14px;
  background: var(--accent-light);
  color: var(--accent-hover);
  font-size: 12px;
  font-weight: 700;
  border-radius: 999px;
  margin-bottom: 14px;
  letter-spacing: .5px;
}
.section-title {
  font-size: 34px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.28;
  letter-spacing: -0.5px;
}
.section-title span { color: var(--accent); }
.section-subtitle {
  margin-top: 12px;
  font-size: 16px;
  color: var(--muted);
  line-height: 1.8;
}

/* Category Cards */
.category-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 32px;
}
.category-card {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  display: flex;
  flex-direction: column;
}
.category-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: #cbd5e1;
}
.category-card figure {
  width: 100%;
  height: 240px;
  overflow: hidden;
  position: relative;
}
.category-card figure img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .45s ease;
}
.category-card:hover figure img { transform: scale(1.05); }
.category-card figure::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, rgba(15,23,42,.18));
}
.category-content {
  padding: 30px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.category-tag {
  align-self: flex-start;
  display: inline-block;
  padding: 4px 14px;
  background: var(--accent-light);
  color: var(--accent-hover);
  font-size: 12px;
  font-weight: 700;
  border-radius: 999px;
  margin-bottom: 14px;
}
.category-content h3 {
  font-size: 21px;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 8px;
}
.category-content p {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.75;
  margin-bottom: 16px;
}
.category-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: auto;
  color: var(--primary);
  font-weight: 700;
  font-size: 14px;
  transition: gap var(--transition), color var(--transition);
}
.category-link:hover { gap: 12px; color: var(--accent); }
.category-link .arw { font-size: 16px; }

/* Intro / Infographic */
.intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}
.intro-visual {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}
.intro-visual img {
  width: 100%;
  height: 440px;
  object-fit: cover;
}
.intro-visual::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(120deg, transparent 65%, rgba(15,23,42,.28));
}
.intro-content h2 {
  font-size: 32px;
  font-weight: 800;
  color: var(--primary);
  line-height: 1.3;
  letter-spacing: -0.4px;
  margin-bottom: 18px;
}
.intro-content h2 span { color: var(--accent); }
.intro-content p {
  color: var(--muted);
  font-size: 16px;
  line-height: 1.85;
  margin-bottom: 14px;
}
.intro-list {
  list-style: none;
  margin-top: 24px;
}
.intro-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 15px;
  color: var(--text);
  margin-bottom: 14px;
  font-weight: 600;
}
.intro-list li i {
  font-style: normal;
  color: var(--accent);
  font-size: 18px;
  line-height: 1.4;
}

/* News List */
.news-layout {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}
.news-item {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 32px;
  padding: 26px 30px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all var(--transition);
}
.news-item:hover {
  box-shadow: var(--shadow-md);
  border-color: #cbd5e1;
  transform: translateX(6px);
}
.news-item-main {
  flex: 1;
}
.news-item-main h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 6px;
  transition: color var(--transition);
}
.news-item:hover .news-item-main h3 { color: var(--accent); }
.news-item-main p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.7;
}
.news-meta {
  flex-shrink: 0;
  display: flex;
  gap: 12px;
  align-items: center;
  margin-top: 8px;
}
.badge {
  display: inline-block;
  padding: 3px 12px;
  border-radius: 999px;
  background: var(--accent-light);
  color: var(--accent-hover);
  font-size: 12px;
  font-weight: 700;
  white-space: nowrap;
}
.news-date {
  color: var(--muted);
  font-size: 13px;
  white-space: nowrap;
}
.news-empty {
  padding: 40px;
  text-align: center;
  background: var(--surface);
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  color: var(--muted);
  font-size: 15px;
}

/* Features */
.features-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.feature-card {
  padding: 36px 26px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  text-align: center;
  transition: all var(--transition);
}
.feature-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
  border-color: #cbd5e1;
}
.feature-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  border-radius: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  font-size: 26px;
  font-weight: 800;
  color: #fff;
  box-shadow: 0 6px 16px rgba(15,23,42,.15);
}
.feature-card h3 {
  font-size: 16px;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 8px;
}
.feature-card p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.7;
}

/* Steps */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.step-item {
  position: relative;
  padding: 32px 26px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: all var(--transition);
}
.step-item:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.step-num {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 18px;
  margin-bottom: 18px;
  box-shadow: 0 4px 12px rgba(15,23,42,.18);
}
.step-item h3 {
  font-size: 17px;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 8px;
}
.step-item p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.75;
}

/* FAQ */
.faq-list {
  max-width: 840px;
  margin: 0 auto;
}
.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 16px;
  overflow: hidden;
  transition: box-shadow var(--transition);
}
.faq-item:hover { box-shadow: var(--shadow-sm); }
.faq-item summary {
  padding: 22px 28px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 700;
  color: var(--primary);
  list-style: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  transition: background var(--transition);
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary:hover { background: #f8fafc; }
.faq-item summary::after {
  content: "+";
  font-size: 24px;
  color: var(--accent);
  transition: transform var(--transition);
  font-weight: 400;
  line-height: 1;
}
.faq-item[open] summary::after { transform: rotate(45deg); }
.faq-body {
  padding: 0 28px 24px;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.85;
}

/* CTA */
.cta-section {
  background: linear-gradient(120deg, #0f172a 0%, #1e293b 55%, #334155 100%);
  padding: 88px 0;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-2.png') center / cover no-repeat;
  opacity: .1;
}
.cta-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 660px;
  margin: 0 auto;
}
.cta-title {
  font-size: 38px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}
.cta-title span { color: var(--accent); }
.cta-desc {
  color: rgba(248,250,252,.8);
  font-size: 16px;
  line-height: 1.8;
  margin-bottom: 32px;
}
.cta-actions {
  display: flex;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}
.cta-actions .btn-primary { background: var(--accent); }
.cta-actions .btn-primary:hover { background: var(--accent-hover); }
.cta-actions .btn-light {
  background: rgba(255,255,255,.1);
  color: #fff;
  border: 1px solid rgba(255,255,255,.35);
}
.cta-actions .btn-light:hover {
  background: rgba(255,255,255,.2);
  transform: translateY(-2px);
}

/* Footer */
.footer {
  background: var(--primary);
  color: rgba(248,250,252,.66);
  padding: 64px 0 30px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.footer-brand .logo { color: #fff; margin-bottom: 14px; }
.footer-brand .logo .logo-icon { box-shadow: none; }
.footer-brand p {
  font-size: 14px;
  line-height: 1.85;
  max-width: 320px;
}
.footer-title {
  font-size: 15px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 20px;
}
.footer-links {
  list-style: none;
}
.footer-links li { margin-bottom: 12px; }
.footer-links a {
  font-size: 14px;
  color: rgba(248,250,252,.66);
  transition: color var(--transition) padding-left var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.footer-links a:hover {
  color: var(--accent);
  padding-left: 4px;
}
.footer-bottom {
  padding-top: 28px;
  text-align: center;
  font-size: 13px;
  color: rgba(248,250,252,.42);
  line-height: 1.8;
}

/* Responsive */
@media (max-width: 1024px) {
  .hero-title { font-size: 44px; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .intro-grid { grid-template-columns: 1fr; gap: 32px; }
  .intro-visual img { height: 340px; }
  .section { --space-section: 80px; }
}
@media (max-width: 768px) {
  .header-inner { height: 66px; }
  .menu-toggle { display: flex; }
  .nav {
    position: fixed;
    top: 66px;
    right: 0;
    bottom: 0;
    left: 0;
    flex-direction: column;
    align-items: stretch;
    background: var(--surface);
    padding: 32px 24px;
    transform: translateX(100%);
    transition: transform .35s cubic-bezier(.4,0,.2,1);
    border-top: 1px solid var(--border);
    z-index: 99;
    overflow-y: auto;
    gap: 8px;
    box-shadow: 0 20px 40px rgba(15,23,42,.08);
  }
  .nav.open { transform: translateX(0); }
  .nav-link {
    padding: 14px 20px;
    font-size: 16px;
    justify-content: flex-start;
  }
  .nav-cta-btn {
    margin-top: 16px;
    width: 100%;
    padding: 14px;
    font-size: 15px;
    justify-content: center;
  }
  .hero { min-height: 540px; padding: 56px 0; }
  .hero-title { font-size: 32px; }
  .hero-subtitle { font-size: 16px; }
  .category-grid { grid-template-columns: 1fr; }
  .news-item { flex-direction: column; gap: 12px; padding: 22px; }
  .news-meta { margin-top: 0; }
  .footer-grid { grid-template-columns: 1fr; gap: 36px; }
  .section { --space-section: 64px; }
  .section-title { font-size: 28px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .cta-title { font-size: 30px; }
}
@media (max-width: 520px) {
  .container { padding: 0 18px; }
  .header-inner { padding: 0 18px; }
  .logo { font-size: 19px; }
  .logo-icon { width: 34px; height: 34px; font-size: 15px; }
  .stats-grid { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: 1fr; }
  .steps-grid { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; }
  .btn { width: 100%; }
  .hero-meta { gap: 24px; }
  .hero-meta-num { font-size: 24px; }
  .cta-actions { flex-direction: column; }
  .cta-actions .btn { width: 100%; }
  .footer-grid { grid-template-columns: 1fr; }
  .faq-item summary { padding: 18px 20px; font-size: 15px; }
  .faq-body { padding: 0 20px 20px; font-size: 14px; }
}

/* roulang page: article */
:root {
  --primary: #4F46E5;
  --primary-dark: #3730A3;
  --primary-light: #818CF8;
  --accent: #F59E0B;
  --accent-light: #FCD34D;
  --bg: #F8FAFC;
  --bg-alt: #F1F5F9;
  --surface: #FFFFFF;
  --text: #0F172A;
  --text-weak: #64748B;
  --border: #E2E8F0;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.08);
  --shadow: 0 10px 30px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 20px 50px rgba(15, 23, 42, 0.12);
  --spacing: 24px;
  --max-width: 1280px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  line-height: 1.75;
  color: var(--text);
  background: var(--bg);
  font-size: 16px;
}

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

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

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

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

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

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

/* ===== Header / Nav ===== */
.header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
}

.header-bar {
  padding: 18px 0;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 26px;
  font-weight: 800;
  letter-spacing: -0.5px;
}

.logo-icon {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  font-weight: 900;
  box-shadow: 0 6px 20px rgba(79, 70, 229, 0.35);
}

.logo-text {
  color: var(--text);
}

.logo-text span {
  color: var(--primary);
}

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

.nav-link {
  padding: 10px 18px;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  border-radius: 10px;
  position: relative;
  border: 1px solid transparent;
  transition: var(--transition);
}

.nav-link:hover {
  color: var(--primary);
  background: rgba(79, 70, 229, 0.06);
  border-color: rgba(79, 70, 229, 0.15);
  transform: translateY(-1px);
}

.nav-link.active {
  color: var(--primary);
  background: rgba(79, 70, 229, 0.08);
  border-color: rgba(79, 70, 229, 0.18);
}

.nav-link.active::after {
  content: "";
  position: absolute;
  bottom: 4px;
  left: 18px;
  right: 18px;
  height: 2px;
  background: var(--primary);
  border-radius: 4px;
}

.nav-cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 26px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff;
  border-radius: 12px;
  font-weight: 700;
  font-size: 14px;
  border: none;
  box-shadow: 0 8px 24px rgba(79, 70, 229, 0.3);
  transition: var(--transition);
}

.nav-cta-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(79, 70, 229, 0.4);
  color: #fff;
}

.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  border: 1px solid var(--border);
}

.mobile-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}

.mobile-menu {
  display: none;
  padding: 16px 0;
  border-top: 1px solid var(--border);
  flex-direction: column;
  gap: 8px;
  background: var(--surface);
}

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

.mobile-menu .nav-link {
  padding: 14px 16px;
  border-radius: 10px;
}

.mobile-menu .nav-cta-btn {
  margin-top: 8px;
  justify-content: center;
}

/* ===== Breadcrumb ===== */
.breadcrumb {
  padding: 24px 0 0;
}

.breadcrumb-list {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-weak);
}

.breadcrumb-list li {
  display: flex;
  align-items: center;
  gap: 8px;
}

.breadcrumb-list li + li::before {
  content: "/";
  color: var(--border);
}

.breadcrumb-list a {
  color: var(--text-weak);
  font-weight: 500;
}

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

.breadcrumb-list .current {
  color: var(--text);
  font-weight: 600;
}

/* ===== Article Hero ===== */
.article-hero {
  position: relative;
  padding: 48px 0 32px;
  background: linear-gradient(135deg, #EEF2FF 0%, #F8FAFC 50%, #FEF3C7 100%);
  border-bottom: 1px solid var(--border);
  overflow: hidden;
}

.article-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-2.png');
  background-size: cover;
  background-position: center;
  opacity: 0.12;
  z-index: 0;
}

.article-hero-content {
  position: relative;
  z-index: 1;
  max-width: 880px;
  margin: 0 auto;
  text-align: center;
}

.article-category-tag {
  display: inline-block;
  padding: 8px 20px;
  background: rgba(79, 70, 229, 0.1);
  border: 1px solid rgba(79, 70, 229, 0.2);
  color: var(--primary);
  border-radius: 100px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.5px;
  margin-bottom: 20px;
  backdrop-filter: blur(8px);
}

.article-hero h1 {
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.3;
  font-weight: 800;
  letter-spacing: -1px;
  color: var(--text);
  margin-bottom: 16px;
}

.article-meta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  color: var(--text-weak);
  font-size: 14px;
}

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

.article-meta-item i {
  font-style: normal;
  font-size: 15px;
}

/* ===== Article Body ===== */
.article-main {
  padding: 48px 0 64px;
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 48px;
  align-items: start;
}

.article-body-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.article-body-inner {
  padding: 40px;
}

.article-body-inner img {
  border-radius: var(--radius);
  margin: 24px 0;
  box-shadow: var(--shadow-sm);
}

.article-body-inner p {
  margin-bottom: 20px;
  color: rgba(15, 23, 42, 0.85);
  font-size: 16px;
  line-height: 1.9;
}

.article-body-inner h2 {
  font-size: 26px;
  font-weight: 700;
  margin: 36px 0 16px;
  letter-spacing: -0.5px;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 12px;
}

.article-body-inner h2::before {
  content: "";
  display: block;
  width: 5px;
  height: 26px;
  border-radius: 4px;
  background: linear-gradient(180deg, var(--primary), var(--accent));
  flex-shrink: 0;
}

.article-body-inner h3 {
  font-size: 20px;
  font-weight: 700;
  margin: 28px 0 12px;
  color: var(--text);
}

.article-body-inner ul,
.article-body-inner ol {
  margin: 0 0 20px 24px;
  color: rgba(15, 23, 42, 0.85);
  line-height: 1.8;
}

.article-body-inner li {
  margin-bottom: 8px;
}

.article-body-inner blockquote {
  position: relative;
  background: #F8FAFC;
  border-left: 4px solid var(--primary);
  padding: 16px 24px;
  border-radius: 12px;
  font-size: 15px;
  color: var(--text);
  margin: 24px 0;
  font-style: italic;
}

.article-body-inner a {
  text-decoration: underline;
  text-underline-offset: 4px;
}

.article-empty {
  text-align: center;
  padding: 80px 24px;
}

.article-empty-icon {
  width: 80px;
  height: 80px;
  margin: 0 auto 24px;
  background: rgba(79, 70, 229, 0.08);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 36px;
}

.article-empty h2 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 12px;
}

.article-empty p {
  color: var(--text-weak);
  margin-bottom: 24px;
}

/* ===== Sidebar ===== */
.article-sidebar {
  position: sticky;
  top: 100px;
  display: flex;
  flex-direction: column;
  gap: 32px;
}

.sidebar-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
}

.sidebar-card-header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
}

.sidebar-card-header .icon-box {
  width: 40px;
  height: 40px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  background: rgba(79, 70, 229, 0.08);
}

.sidebar-card-header h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
}

.sidebar-link-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.sidebar-link-list a {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 12px 16px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
  transition: var(--transition);
}

.sidebar-link-list a:hover {
  background: rgba(79, 70, 229, 0.06);
  border-color: rgba(79, 70, 229, 0.2);
  color: var(--primary);
  transform: translateX(4px);
}

.sidebar-link-list a .link-num {
  font-size: 12px;
  font-weight: 800;
  color: var(--primary);
  background: rgba(79, 70, 229, 0.1);
  padding: 2px 8px;
  border-radius: 100px;
}

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

.sidebar-tag {
  display: inline-block;
  padding: 8px 16px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 100px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text);
  transition: var(--transition);
}

.sidebar-tag:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
  transform: translateY(-2px);
}

.sidebar-cta {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff;
  border: none;
  border-radius: var(--radius);
  padding: 32px 28px;
  text-align: center;
}

.sidebar-cta h3 {
  font-size: 22px;
  font-weight: 800;
  margin-bottom: 12px;
  color: #fff;
}

.sidebar-cta p {
  font-size: 14px;
  opacity: 0.85;
  margin-bottom: 20px;
  line-height: 1.7;
}

.sidebar-cta a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  background: #fff;
  color: var(--primary);
  border-radius: 10px;
  font-weight: 700;
  font-size: 14px;
  transition: var(--transition);
}

.sidebar-cta a:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 28px rgba(0, 0, 0, 0.2);
  color: var(--primary-dark);
}

/* ===== Article Bottom CTA ===== */
.article-cta {
  position: relative;
  margin: 0 auto 64px;
  max-width: var(--max-width);
  padding: 56px 48px;
  border-radius: 24px;
  overflow: hidden;
  background: linear-gradient(135deg, #0F172A 0%, #1E293B 100%);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}

.article-cta::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-3.png');
  background-size: cover;
  background-position: center;
  opacity: 0.25;
  z-index: 0;
}

.article-cta-content,
.article-cta-action {
  position: relative;
  z-index: 1;
}

.article-cta h2 {
  font-size: 28px;
  font-weight: 800;
  margin-bottom: 10px;
}

.article-cta p {
  font-size: 15px;
  opacity: 0.8;
  line-height: 1.7;
}

.article-cta .btn-white {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: #fff;
  color: var(--text);
  border-radius: 12px;
  font-weight: 700;
  font-size: 15px;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
  transition: var(--transition);
  white-space: nowrap;
}

.article-cta .btn-white:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 32px rgba(0, 0, 0, 0.3);
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff;
}

.article-cta .btn-outline-light {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: 12px;
  font-weight: 600;
  font-size: 14px;
  transition: var(--transition);
}

.article-cta .btn-outline-light:hover {
  border-color: #fff;
  transform: translateY(-2px);
  background: rgba(255, 255, 255, 0.1);
}

/* ===== Footer ===== */
.footer {
  background: #0F172A;
  color: rgba(255, 255, 255, 0.75);
  padding: 64px 0 0;
  margin-top: 64px;
}

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

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

.footer-brand .logo-text {
  color: #fff;
}

.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  max-width: 360px;
  color: rgba(255, 255, 255, 0.6);
}

.footer-title {
  color: #fff;
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 20px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.6);
  font-size: 14px;
  transition: var(--transition);
}

.footer-links a:hover {
  color: #fff;
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 20px 0;
  text-align: center;
  font-size: 13px;
  color: rgba(255, 255, 255, 0.4);
}

/* ===== Buttons / Shared ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: 12px;
  font-weight: 700;
  font-size: 15px;
  border: none;
  transition: var(--transition);
  text-align: center;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: #fff;
  box-shadow: 0 8px 20px rgba(79, 70, 229, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 30px rgba(79, 70, 229, 0.4);
  color: #fff;
}

.btn-outline {
  background: transparent;
  border: 2px solid var(--primary);
  color: var(--primary);
}

.btn-outline:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-2px);
}

/* ===== Tag / Badge ===== */
.tag {
  display: inline-flex;
  align-items: center;
  padding: 6px 14px;
  border-radius: 100px;
  font-size: 12px;
  font-weight: 600;
  background: rgba(79, 70, 229, 0.08);
  color: var(--primary);
  border: 1px solid rgba(79, 70, 229, 0.12);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .article-layout {
    grid-template-columns: 1fr;
  }

  .article-sidebar {
    position: static;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
  }

  .sidebar-cta {
    grid-column: span 2;
  }

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

  .footer-brand {
    grid-column: span 2;
  }
}

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

  .mobile-toggle {
    display: flex;
  }

  .header-inner {
    flex-wrap: wrap;
  }

  .article-body-inner {
    padding: 28px 20px;
  }

  .article-cta {
    flex-direction: column;
    align-items: flex-start;
    padding: 40px 28px;
  }

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

  .article-meta {
    gap: 10px;
    flex-direction: column;
  }

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

  .footer-brand {
    grid-column: span 1;
  }
}

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

  .article-hero {
    padding: 32px 0 24px;
  }

  .article-hero h1 {
    font-size: 24px;
  }

  .article-sidebar {
    grid-template-columns: 1fr;
  }

  .sidebar-cta {
    grid-column: span 1;
  }

  .article-cta {
    padding: 32px 20px;
    border-radius: 16px;
  }

  .article-cta h2 {
    font-size: 20px;
  }

  .btn {
    padding: 12px 20px;
    font-size: 14px;
  }

  .breadcrumb-list {
    flex-wrap: wrap;
  }
}

/* roulang page: category1 */
:root {
    --primary: #0f172a;
    --primary-light: #1e293b;
    --accent: #ff6b35;
    --accent-dark: #e85d26;
    --accent-soft: #fff4ee;
    --bg: #f6f7f9;
    --surface: #ffffff;
    --text: #0f172a;
    --text-soft: #5b6779;
    --border: #e6e9ef;
    --radius-sm: 8px;
    --radius: 14px;
    --radius-lg: 22px;
    --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.05);
    --shadow: 0 10px 35px rgba(15, 23, 42, 0.08);
    --shadow-lg: 0 24px 70px rgba(15, 23, 42, 0.15);
    --container: 1200px;
    --section-space: 100px;
    --transition: 0.25s ease;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    line-height: 1.7;
    color: var(--text);
    background: var(--bg);
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; cursor: pointer; border: none; background: none; }
ul, ol { list-style: none; }

.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.section { padding: var(--section-space) 0; }
.section-alt { background: var(--bg); }

.section-head { max-width: 720px; margin: 0 auto 56px; text-align: center; }
.section-kicker {
    display: inline-block;
    font-size: 14px;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--accent);
    text-transform: uppercase;
    padding: 6px 16px;
    background: var(--accent-soft);
    border-radius: 100px;
    margin-bottom: 14px;
}
.section-head h2 { font-size: clamp(28px, 4vw, 40px); font-weight: 800; line-height: 1.25; letter-spacing: -0.5px; margin-bottom: 14px; color: var(--primary); }
.section-head p { font-size: 16px; color: var(--text-soft); line-height: 1.8; }

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 100px;
    font-weight: 600;
    font-size: 16px;
    line-height: 1;
    transition: var(--transition);
    border: 2px solid transparent;
    white-space: nowrap;
}
.btn-primary { background: var(--accent); color: #fff; box-shadow: 0 8px 24px rgba(255, 107, 53, 0.3); }
.btn-primary:hover { background: var(--accent-dark); transform: translateY(-2px); box-shadow: 0 12px 30px rgba(255, 107, 53, 0.4); }
.btn-ghost { background: transparent; border-color: rgba(255,255,255,0.6); color: #fff; }
.btn-ghost:hover { background: rgba(255,255,255,0.12); border-color: #fff; transform: translateY(-2px); }
.btn-outline { background: transparent; border-color: var(--border); color: var(--text); }
.btn-outline:hover { border-color: var(--accent); color: var(--accent); background: var(--accent-soft); }
.btn-dark { background: var(--primary); color: #fff; }
.btn-dark:hover { background: var(--primary-light); transform: translateY(-2px); box-shadow: var(--shadow); }
.btn-lg { padding: 17px 40px; font-size: 17px; }

.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--border);
    transition: box-shadow 0.3s ease;
}
.site-header.scrolled { box-shadow: var(--shadow-sm); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; gap: 24px; }

.logo { display: inline-flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo-icon {
    width: 38px;
    height: 38px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--accent), #ff9a62);
    color: #fff;
    font-weight: 800;
    font-size: 20px;
    border-radius: 10px;
    box-shadow: 0 4px 14px rgba(255, 107, 53, 0.35);
}
.logo-text { font-size: 20px; font-weight: 800; color: var(--primary); letter-spacing: -0.4px; }
.logo-text span { color: var(--accent); }

.nav { display: flex; align-items: center; gap: 8px; }
.nav-link {
    padding: 9px 18px;
    font-size: 15px;
    font-weight: 500;
    color: var(--text-soft);
    border-radius: 100px;
    transition: var(--transition);
    white-space: nowrap;
}
.nav-link:hover { color: var(--primary); background: rgba(15, 23, 42, 0.05); }
.nav-link.active { color: var(--primary); font-weight: 700; background: var(--accent-soft); color: var(--accent); }
.nav-cta-btn {
    padding: 11px 24px;
    font-size: 15px;
    font-weight: 700;
    color: #fff;
    background: var(--accent);
    border-radius: 100px;
    transition: var(--transition);
    box-shadow: 0 6px 18px rgba(255, 107, 53, 0.3);
    white-space: nowrap;
    margin-left: 8px;
}
.nav-cta-btn:hover { background: var(--accent-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(255, 107, 53, 0.4); }

.nav-toggle { display: none; flex-direction: column; gap: 5px; padding: 8px; border-radius: var(--radius-sm); transition: var(--transition); }
.nav-toggle span { display: block; width: 24px; height: 2.5px; background: var(--primary); border-radius: 2px; transition: var(--transition); }
.nav-toggle.open span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

.page-hero {
    background-size: cover;
    background-position: center;
    position: relative;
    padding: 140px 0 120px;
}
.page-hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(120deg, rgba(15, 23, 42, 0.94) 0%, rgba(15, 23, 42, 0.78) 55%, rgba(255, 107, 53, 0.25) 100%);
}
.page-hero .container { position: relative; z-index: 2; }
.hero-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 7px 18px;
    border-radius: 100px;
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: #fff;
    font-size: 14px;
    font-weight: 500;
    backdrop-filter: blur(8px);
    margin-bottom: 24px;
}
.hero-tag::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--accent); box-shadow: 0 0 0 4px rgba(255, 107, 53, 0.3); }
.page-hero h1 {
    font-size: clamp(36px, 6vw, 64px);
    font-weight: 900;
    line-height: 1.15;
    color: #fff;
    letter-spacing: -1px;
    margin-bottom: 20px;
}
.page-hero h1 .highlight { color: var(--accent); }
.page-hero p {
    font-size: clamp(16px, 2vw, 20px);
    color: rgba(255, 255, 255, 0.85);
    max-width: 620px;
    line-height: 1.8;
    margin-bottom: 36px;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

.section-guide { background: var(--surface); border-bottom: 1px solid var(--border); }
.metrics-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 24px; }
.metric-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px 24px;
    text-align: center;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}
.metric-card::before {
    content: "";
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 4px;
    background: var(--accent);
    opacity: 0;
    transition: var(--transition);
}
.metric-card:hover { transform: translateY(-6px); box-shadow: var(--shadow); }
.metric-card:hover::before { opacity: 1; }
.metric-icon {
    width: 60px; height: 60px;
    margin: 0 auto 18px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    background: var(--accent-soft);
    color: var(--accent);
}
.metric-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 8px; color: var(--primary); }
.metric-card p { font-size: 14px; color: var(--text-soft); line-height: 1.7; }

.review-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.review-card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--border);
    transition: transform var(--transition), box-shadow var(--transition);
    display: flex;
    flex-direction: column;
}
.review-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }
.review-cover { position: relative; overflow: hidden; aspect-ratio: 16/10; }
.review-cover img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.review-card:hover .review-cover img { transform: scale(1.05); }
.review-tag {
    position: absolute;
    top: 14px; left: 14px;
    padding: 5px 14px;
    border-radius: 100px;
    font-size: 12px;
    font-weight: 700;
    color: #fff;
    background: var(--accent);
    box-shadow: 0 4px 12px rgba(255, 107, 53, 0.4);
}
.review-body { padding: 24px 22px 22px; display: flex; flex-direction: column; flex: 1; }
.review-body h3 { font-size: 18px; font-weight: 700; line-height: 1.5; margin-bottom: 10px; color: var(--primary); transition: var(--transition); }
.review-card:hover .review-body h3 { color: var(--accent); }
.review-body p { font-size: 14px; color: var(--text-soft); line-height: 1.75; margin-bottom: 18px; flex: 1; }
.review-meta { display: flex; align-items: center; gap: 10px; font-size: 13px; color: var(--text-soft); border-top: 1px solid var(--border); padding-top: 16px; }
.review-meta i { font-style: normal; }
.review-meta .sep { width: 4px; height: 4px; border-radius: 50%; background: var(--border); }
.review-readmore { margin-left: auto; font-weight: 600; color: var(--accent); font-size: 13px; display: inline-flex; align-items: center; gap: 4px; }

.dark-lab {
    background: var(--primary);
    position: relative;
    overflow: hidden;
}
.dark-lab::before {
    content: "";
    position: absolute;
    top: -40%; right: -15%;
    width: 600px; height: 600px;
    background: radial-gradient(circle, rgba(255, 107, 53, 0.25), transparent 60%);
    pointer-events: none;
}
.dark-lab::after {
    content: "";
    position: absolute;
    bottom: -20%; left: -10%;
    width: 400px; height: 400px;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.06), transparent 60%);
    pointer-events: none;
}
.dark-lab .container { position: relative; z-index: 2; }
.lab-head { text-align: center; margin-bottom: 60px; }
.lab-head .section-kicker { background: rgba(255, 107, 53, 0.15); color: var(--accent); }
.lab-head h2 { font-size: clamp(28px, 4vw, 42px); font-weight: 800; color: #fff; margin-bottom: 14px; }
.lab-head p { font-size: 16px; color: rgba(255, 255, 255, 0.65); }

.lab-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-bottom: 48px;
}
.lab-stat {
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: var(--radius);
    padding: 32px 20px;
    text-align: center;
    transition: var(--transition);
}
.lab-stat:hover { background: rgba(255, 255, 255, 0.1); transform: translateY(-4px); }
.stat-number {
    font-size: clamp(36px, 5vw, 52px);
    font-weight: 900;
    color: var(--accent);
    line-height: 1.2;
    letter-spacing: -1px;
}
.stat-number small { font-size: 20px; font-weight: 700; }
.stat-label { font-size: 14px; color: rgba(255, 255, 255, 0.6); margin-top: 8px; }

.lab-bars { max-width: 760px; margin: 0 auto; }
.lab-bar-item { margin-bottom: 24px; }
.lab-bar-head { display: flex; justify-content: space-between; margin-bottom: 8px; font-size: 14px; }
.lab-bar-head span:first-child { color: rgba(255, 255, 255, 0.8); font-weight: 600; }
.lab-bar-head span:last-child { color: var(--accent); font-weight: 800; }
.lab-bar-track { height: 8px; background: rgba(255, 255, 255, 0.1); border-radius: 100px; overflow: hidden; }
.lab-bar-fill {
    height: 100%;
    border-radius: 100px;
    background: linear-gradient(90deg, var(--accent), #ffb38a);
    animation: growBar 1.2s ease-out both;
}
@keyframes growBar {
    from { width: 0; }
}

.process-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.process-step {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    position: relative;
    transition: var(--transition);
}
.process-step:hover { transform: translateY(-8px); box-shadow: var(--shadow); }
.step-number {
    font-size: 48px;
    font-weight: 900;
    color: transparent;
    -webkit-text-stroke: 2px var(--accent);
    line-height: 1;
    margin-bottom: 20px;
}
.process-step h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; color: var(--primary); }
.process-step p { font-size: 14px; color: var(--text-soft); line-height: 1.8; }

.faq-wrap { max-width: 860px; margin: 0 auto; }
.faq-item {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 16px;
    overflow: hidden;
    transition: var(--transition);
}
.faq-item:hover { border-color: var(--accent); }
.faq-q {
    padding: 22px 28px;
    font-size: 16px;
    font-weight: 600;
    color: var(--primary);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 16px;
    transition: var(--transition);
}
.faq-q::after { content: "+"; font-size: 24px; font-weight: 400; color: var(--accent); transition: var(--transition); }
.faq-item.open .faq-q::after { content: "−"; transform: rotate(180deg); }
.faq-a {
    padding: 0 28px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease, padding 0.3s ease;
}
.faq-item.open .faq-a { padding: 0 28px 22px; max-height: 400px; }
.faq-a p { font-size: 15px; color: var(--text-soft); line-height: 1.8; }

.cta-box {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    border-radius: 28px;
    padding: 60px 48px;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.cta-box::before {
    content: "";
    position: absolute;
    top: -50%; right: -20%;
    width: 400px; height: 400px;
    background: radial-gradient(circle, rgba(255, 107, 53, 0.3), transparent 60%);
}
.cta-box h2 { font-size: clamp(26px, 4vw, 38px); font-weight: 800; color: #fff; margin-bottom: 14px; position: relative; z-index: 1; }
.cta-box p { font-size: 16px; color: rgba(255, 255, 255, 0.75); max-width: 560px; margin: 0 auto 32px; position: relative; z-index: 1; }
.cta-box .btn { position: relative; z-index: 1; }

.footer { background: var(--primary); color: rgba(255, 255, 255, 0.7); padding: 60px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 48px; padding-bottom: 40px; }
.footer-brand .logo { margin-bottom: 16px; }
.footer-brand .logo-text { color: #fff; }
.footer-brand p { font-size: 14px; line-height: 1.8; max-width: 300px; }
.footer-title { font-size: 14px; font-weight: 700; color: #fff; letter-spacing: 1.5px; margin-bottom: 18px; text-transform: uppercase; }
.footer-links li { margin-bottom: 12px; }
.footer-links a { font-size: 14px; color: rgba(255, 255, 255, 0.65); transition: var(--transition); }
.footer-links a:hover { color: var(--accent); padding-left: 4px; }
.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 24px 0;
    text-align: center;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.45);
}

@media (max-width: 1024px) {
    .metrics-grid { grid-template-columns: repeat(3, 1fr); }
    .review-grid { grid-template-columns: repeat(2, 1fr); }
    .process-grid { grid-template-columns: repeat(2, 1fr); }
    .lab-stats { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    :root { --section-space: 72px; }
    .header-inner { height: 64px; }
    .nav-toggle { display: flex; }
    .nav {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        align-items: stretch;
        padding: 20px 24px 28px;
        gap: 6px;
        box-shadow: 0 20px 50px rgba(15, 23, 42, 0.2);
        transform: translateY(-20px);
        opacity: 0;
        pointer-events: none;
        transition: var(--transition);
        border-bottom: 1px solid var(--border);
    }
    .nav.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
    .nav-link { padding: 14px 16px; font-size: 16px; text-align: center; }
    .nav-cta-btn { margin: 8px 0 0; text-align: center; }
    .page-hero { padding: 100px 0 80px; }
    .hero-actions .btn { width: 100%; justify-content: center; }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .section-head { margin-bottom: 40px; }
}
@media (max-width: 520px) {
    .metrics-grid { grid-template-columns: 1fr; }
    .review-grid { grid-template-columns: 1fr; }
    .process-grid { grid-template-columns: 1fr; }
    .lab-stats { grid-template-columns: 1fr; }
    .cta-box { padding: 40px 24px; }
    .faq-q { padding: 18px 20px; font-size: 15px; }
    .faq-a { transition: none; }
    .hero-cta .btn { width: 100%; justify-content: center; }
}

/* roulang page: category2 */
:root {
            --primary: #0e1c34;
            --primary-soft: #17294a;
            --accent: #ff7315;
            --accent-light: #ffa14a;
            --gold: #f6c453;
            --bg: #f4f6fa;
            --card: #ffffff;
            --text: #101828;
            --text-weak: #5f6d80;
            --border: #e6eaf0;
            --radius: 18px;
            --radius-sm: 12px;
            --shadow: 0 10px 35px rgba(10, 20, 40, 0.08);
            --shadow-lg: 0 22px 55px rgba(10, 20, 40, 0.14);
            --maxw: 1200px;
            --ease: 0.25s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }

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

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

        ul,
        ol {
            list-style: none;
        }

        button,
        input,
        select {
            font: inherit;
        }

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

        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: rgba(14, 28, 52, 0.94);
            backdrop-filter: blur(18px);
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
            gap: 24px;
        }

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

        .logo-icon {
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--accent), #ffb84a);
            display: grid;
            place-items: center;
            color: #fff;
            font-weight: 800;
            font-size: 20px;
            box-shadow: 0 6px 16px rgba(255, 115, 21, 0.4);
        }

        .logo-text {
            font-size: 21px;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.4px;
        }

        .logo-text span {
            color: var(--accent);
        }

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

        .nav-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: rgba(255, 255, 255, 0.82);
            padding: 9px 16px;
            border-radius: 10px;
            font-size: 15px;
            font-weight: 600;
            transition: background var(--ease), color var(--ease);
        }

        .nav-link i {
            font-size: 14px;
            opacity: 0.8;
        }

        .nav-link:hover {
            color: #fff;
            background: rgba(255, 255, 255, 0.1);
        }

        .nav-link.active {
            color: #fff;
            background: rgba(255, 255, 255, 0.13);
            box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.12);
        }

        .nav-cta-btn {
            background: var(--accent);
            color: #fff;
            padding: 10px 22px;
            border-radius: 12px;
            font-weight: 700;
            font-size: 15px;
            white-space: nowrap;
            box-shadow: 0 6px 18px rgba(255, 115, 21, 0.35);
            transition: all var(--ease);
        }

        .nav-cta-btn:hover {
            background: #ff8c3d;
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 10px 24px rgba(255, 115, 21, 0.45);
        }

        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: 10px;
            background: rgba(255, 255, 255, 0.06);
            color: #fff;
            font-size: 18px;
            cursor: pointer;
            align-items: center;
            justify-content: center;
        }

        .hero-guide {
            position: relative;
            background: url('/assets/images/backpic/back-2.png') center / cover no-repeat;
            padding: 120px 0 100px;
            color: #fff;
            overflow: hidden;
        }

        .hero-guide::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(105deg,
                rgba(8, 15, 32, 0.95) 15%,
                rgba(8, 15, 32, 0.78) 55%,
                rgba(8, 15, 32, 0.55));
        }

        .hero-guide .container {
            position: relative;
            z-index: 2;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 115, 21, 0.18);
            border: 1px solid rgba(255, 115, 21, 0.4);
            color: #ffbf80;
            padding: 6px 16px;
            border-radius: 40px;
            font-size: 13px;
            font-weight: 700;
            letter-spacing: 0.5px;
        }

        .hero-guide h1 {
            font-size: 48px;
            line-height: 1.2;
            margin-top: 24px;
            letter-spacing: -1.5px;
            font-weight: 800;
            max-width: 680px;
        }

        .hero-guide h1 em {
            color: var(--accent-light);
            font-style: normal;
        }

        .hero-desc {
            margin-top: 20px;
            font-size: 17px;
            color: rgba(255, 255, 255, 0.82);
            max-width: 620px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 16px;
            margin-top: 36px;
        }

        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--accent);
            color: #fff;
            padding: 14px 28px;
            border-radius: 14px;
            font-weight: 700;
            font-size: 15px;
            box-shadow: 0 8px 22px rgba(255, 115, 21, 0.35);
            transition: all var(--ease);
            border: none;
            cursor: pointer;
        }

        .btn-primary:hover {
            background: #ff8c3d;
            transform: translateY(-2px);
            box-shadow: 0 12px 28px rgba(255, 115, 21, 0.45);
        }

        .btn-ghost {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.2);
            color: #fff;
            padding: 14px 28px;
            border-radius: 14px;
            font-weight: 600;
            font-size: 15px;
            transition: all var(--ease);
        }

        .btn-ghost:hover {
            background: rgba(255, 255, 255, 0.16);
            border-color: rgba(255, 255, 255, 0.35);
        }

        .hero-quick-stats {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
            margin-top: 56px;
            max-width: 720px;
        }

        .quick-stat {
            background: rgba(255, 255, 255, 0.08);
            border: 1px solid rgba(255, 255, 255, 0.12);
            border-radius: 16px;
            padding: 20px;
            backdrop-filter: blur(4px);
        }

        .quick-stat .qs-num {
            font-size: 30px;
            font-weight: 800;
            color: var(--gold);
        }

        .quick-stat .qs-label {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.75);
            margin-top: 4px;
        }

        .section {
            padding: 90px 0;
        }

        .section-alt {
            background: #fff;
        }

        .section-accent {
            background: linear-gradient(180deg, #f4f6fa 0%, #fff 100%);
        }

        .section-head {
            max-width: 760px;
            margin-bottom: 50px;
        }

        .section-head.center {
            margin-inline: auto;
            text-align: center;
        }

        .section-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 115, 21, 0.1);
            color: var(--accent);
            font-weight: 700;
            font-size: 13px;
            letter-spacing: 1px;
            padding: 6px 16px;
            border-radius: 40px;
        }

        .section-title {
            font-size: 36px;
            line-height: 1.25;
            margin-top: 14px;
            letter-spacing: -1px;
            font-weight: 800;
            color: var(--primary);
        }

        .section-desc {
            color: var(--text-weak);
            margin-top: 14px;
            font-size: 16px;
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 22px;
        }

        .stat-card {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 30px 24px;
            box-shadow: var(--shadow);
            text-align: center;
            transition: transform var(--ease), box-shadow var(--ease);
        }

        .stat-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
        }

        .stat-card i {
            font-size: 24px;
            color: var(--accent);
            background: rgba(255, 115, 21, 0.12);
            width: 52px;
            height: 52px;
            display: grid;
            place-items: center;
            border-radius: 14px;
            margin: 0 auto 14px;
        }

        .stat-num {
            font-size: 40px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
        }

        .stat-num em {
            color: var(--accent);
            font-style: normal;
        }

        .stat-label {
            color: var(--text-weak);
            margin-top: 6px;
            font-size: 14px;
        }

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

        .step-card {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 34px 28px;
            position: relative;
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: transform var(--ease), box-shadow var(--ease);
        }

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

        .step-card::before {
            counter-increment: step;
            content: '0' counter(step);
            position: absolute;
            right: 18px;
            top: 12px;
            font-size: 56px;
            font-weight: 800;
            color: rgba(14, 28, 52, 0.04);
            line-height: 1;
            transition: color var(--ease);
        }

        .step-card:hover::before {
            color: rgba(255, 115, 21, 0.1);
        }

        .step-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: var(--primary);
            color: #fff;
            display: grid;
            place-items: center;
            font-size: 20px;
            margin-bottom: 20px;
        }

        .step-card h3 {
            font-size: 20px;
            margin-bottom: 10px;
            position: relative;
            z-index: 1;
        }

        .step-card p {
            color: var(--text-weak);
            font-size: 14px;
            position: relative;
            z-index: 1;
        }

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

        .scene-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow);
            transition: transform var(--ease), box-shadow var(--ease);
        }

        .scene-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
        }

        .scene-cover {
            height: 190px;
            background-size: cover;
            background-position: center;
            position: relative;
        }

        .scene-cover::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 40%, rgba(14, 28, 52, 0.45));
        }

        .scene-body {
            padding: 26px;
        }

        .scene-tag {
            display: inline-block;
            background: rgba(255, 115, 21, 0.1);
            color: var(--accent);
            font-size: 12px;
            font-weight: 700;
            padding: 4px 12px;
            border-radius: 30px;
            margin-bottom: 12px;
        }

        .scene-body h3 {
            font-size: 20px;
            margin-bottom: 8px;
        }

        .scene-body p {
            color: var(--text-weak);
            font-size: 14px;
            margin-bottom: 16px;
        }

        .scene-feats {
            border-top: 1px dashed var(--border);
            padding-top: 14px;
        }

        .scene-feats li {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text);
            padding: 4px 0;
        }

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

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

        .budget-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            padding: 28px 24px;
            text-align: center;
            transition: all var(--ease);
            position: relative;
            overflow: hidden;
        }

        .budget-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--accent), var(--gold));
            opacity: 0;
            transition: opacity var(--ease);
        }

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

        .budget-card:hover {
            transform: translateY(-5px);
            box-shadow: var(--shadow-lg);
        }

        .budget-range {
            font-size: 20px;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 8px;
        }

        .budget-label {
            font-size: 13px;
            color: var(--text-weak);
            background: rgba(14, 28, 52, 0.05);
            display: inline-block;
            padding: 4px 14px;
            border-radius: 30px;
            margin-bottom: 18px;
        }

        .budget-card ul {
            text-align: left;
            margin-top: 16px;
        }

        .budget-card li {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text);
            padding: 5px 0;
        }

        .budget-card li i {
            color: var(--accent);
            font-size: 12px;
        }

        .budget-note {
            font-size: 12px;
            color: var(--text-weak);
            margin-top: 14px;
            padding-top: 12px;
            border-top: 1px dashed var(--border);
        }

        .metrics-wrap {
            background: linear-gradient(135deg, #0b1930 0%, #162b4f 100%);
            border-radius: 30px;
            padding: 64px;
            color: #fff;
            position: relative;
            overflow: hidden;
        }

        .metrics-wrap::before {
            content: '';
            position: absolute;
            width: 300px;
            height: 300px;
            background: radial-gradient(circle, rgba(255, 115, 21, 0.18), transparent 65%);
            top: -100px;
            right: -80px;
            border-radius: 50%;
        }

        .metrics-wrap .section-title {
            color: #fff;
        }

        .metrics-wrap .section-desc {
            color: rgba(255, 255, 255, 0.7);
        }

        .metrics-head {
            display: flex;
            justify-content: space-between;
            align-items: flex-end;
            margin-bottom: 40px;
            flex-wrap: wrap;
            gap: 18px;
            position: relative;
            z-index: 1;
        }

        .metric-row {
            display: flex;
            align-items: center;
            gap: 18px;
            padding: 16px 0;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .metric-row:last-child {
            border-bottom: none;
        }

        .metric-label {
            width: 90px;
            color: rgba(255, 255, 255, 0.85);
            font-weight: 600;
            font-size: 14px;
            flex-shrink: 0;
        }

        .metric-bar-bg {
            flex: 1;
            height: 12px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 30px;
            overflow: hidden;
        }

        .metric-bar-fill {
            height: 100%;
            border-radius: 30px;
            background: linear-gradient(90deg, var(--accent), var(--gold));
            width: 0;
            transition: width 1s ease;
        }

        .metric-percent {
            width: 60px;
            text-align: right;
            font-weight: 800;
            color: var(--gold);
            font-size: 16px;
        }

        .metric-score {
            font-size: 13px;
            color: rgba(255, 255, 255, 0.7);
            width: 90px;
            text-align: right;
        }

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

        .faq-item {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: 16px;
            margin-bottom: 14px;
            box-shadow: 0 4px 14px rgba(10, 20, 40, 0.03);
            transition: box-shadow var(--ease);
        }

        .faq-item.open {
            box-shadow: var(--shadow);
            border-color: rgba(255, 115, 21, 0.25);
        }

        .faq-q {
            padding: 20px 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
            font-weight: 700;
            font-size: 16px;
            gap: 16px;
        }

        .faq-q .faq-icon {
            width: 30px;
            height: 30px;
            border-radius: 50%;
            background: rgba(255, 115, 21, 0.1);
            color: var(--accent);
            display: grid;
            place-items: center;
            font-size: 14px;
            flex-shrink: 0;
            transition: transform var(--ease), background var(--ease), color var(--ease);
        }

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

        .faq-a {
            padding: 0 24px 22px;
            color: var(--text-weak);
            font-size: 14px;
            display: none;
        }

        .faq-item.open .faq-a {
            display: block;
        }

        .cta-section {
            background: url('/assets/images/backpic/back-3.png') center / cover no-repeat;
            padding: 90px 0;
            position: relative;
        }

        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(120deg, rgba(8, 15, 32, 0.92), rgba(8, 15, 32, 0.78));
        }

        .cta-box {
            position: relative;
            z-index: 2;
            text-align: center;
            color: #fff;
            max-width: 780px;
            margin: 0 auto;
        }

        .cta-box .section-title {
            color: #fff;
        }

        .cta-box .section-desc {
            color: rgba(255, 255, 255, 0.78);
        }

        .cta-actions {
            display: flex;
            justify-content: center;
            flex-wrap: wrap;
            gap: 16px;
            margin-top: 32px;
        }

        .footer {
            background: #0a1424;
            color: rgba(255, 255, 255, 0.75);
            padding: 70px 0 24px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr;
            gap: 48px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        }

        .footer-brand .logo-text {
            font-size: 22px;
        }

        .footer-brand p {
            margin-top: 14px;
            font-size: 14px;
            line-height: 1.8;
            max-width: 320px;
        }

        .footer-title {
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 16px;
        }

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

        .footer-links a {
            color: rgba(255, 255, 255, 0.65);
            font-size: 14px;
            transition: color var(--ease), padding-left var(--ease);
        }

        .footer-links a:hover {
            color: #fff;
            padding-left: 4px;
        }

        .footer-bottom {
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            padding-top: 20px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
        }

        @media (max-width: 1024px) {
            .hero-guide h1 {
                font-size: 38px;
            }

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

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

            .metrics-wrap {
                padding: 40px;
            }

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

        @media (max-width: 768px) {
            .nav-toggle {
                display: flex;
            }

            .nav {
                position: fixed;
                top: 72px;
                left: 16px;
                right: 16px;
                background: var(--primary);
                flex-direction: column;
                align-items: stretch;
                padding: 16px;
                gap: 8px;
                border-radius: 0 0 20px 20px;
                box-shadow: 0 30px 50px rgba(0, 0, 0, 0.35);
                transform: translateY(-140%);
                opacity: 0;
                visibility: hidden;
                transition: transform 0.35s ease, opacity 0.35s ease, visibility 0.35s;
            }

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

            .nav-link {
                padding: 12px 16px;
                font-size: 16px;
            }

            .nav-cta-btn {
                text-align: center;
                width: 100%;
                justify-content: center;
                margin-top: 6px;
            }

            .hero-guide {
                padding: 80px 0 70px;
            }

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

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

            .section {
                padding: 64px 0;
            }

            .section-title {
                font-size: 28px;
            }

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

            .metrics-wrap {
                padding: 28px 22px;
                border-radius: 20px;
            }

            .metric-label {
                width: 70px;
                font-size: 13px;
            }

            .metric-score {
                display: none;
            }

            .metric-percent {
                width: 48px;
            }

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

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

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

            .header-inner {
                height: 64px;
            }

            .nav {
                top: 64px;
            }

            .logo-text {
                font-size: 18px;
            }

            .logo-icon {
                width: 36px;
                height: 36px;
                font-size: 18px;
            }

            .hero-guide h1 {
                font-size: 26px;
            }

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

            .btn-primary,
            .btn-ghost {
                width: 100%;
                justify-content: center;
                padding: 13px 20px;
            }

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

            .stat-num {
                font-size: 34px;
            }

            .metrics-head {
                flex-direction: column;
                align-items: flex-start;
            }

            .faq-q {
                padding: 16px 18px;
                font-size: 15px;
            }

            .faq-a {
                padding: 0 18px 18px;
            }

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