/* roulang page: index */
:root {
  --primary: #0B3B2E;
  --accent: #D9F24A;
  --warm: #FF6B1A;
  --bg: #F4F6F2;
  --dark: #0C1D18;
  --text: #16231E;
  --muted: #5C6B64;
  --white: #FFFFFF;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --shadow-sm: 0 2px 8px rgba(11,59,46,0.06);
  --shadow-md: 0 8px 24px rgba(11,59,46,0.10);
  --shadow-lg: 0 24px 48px rgba(11,59,46,0.16);
  --font: 'PingFang SC', 'HarmonyOS Sans SC', 'Microsoft YaHei', system-ui, sans-serif;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
button { font-family: var(--font); border: none; background: none; cursor: pointer; }
input { font-family: var(--font); }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}
.section-pad { padding: 72px 0; }
@media (max-width: 768px) { .section-pad { padding: 48px 0; } .container { padding: 0 16px; } }

/* Header */
.site-header {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 56px;
  z-index: 100;
  display: flex;
  align-items: stretch;
  transition: position 0s, background 0.3s;
}
.site-header.scrolled {
  position: fixed;
  background: var(--primary);
  box-shadow: var(--shadow-md);
}
.header-left {
  flex: 0 0 45%;
  display: flex;
  align-items: center;
  padding: 0 24px;
  background: transparent;
  transition: background 0.3s;
}
.header-right {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
  padding: 0 24px;
  background: transparent;
  transition: background 0.3s;
}
.site-header.scrolled .header-left,
.site-header.scrolled .header-right { background: transparent; }
.logo {
  font-size: 20px;
  font-weight: 900;
  color: var(--primary);
  letter-spacing: -0.02em;
  white-space: nowrap;
  transition: color 0.3s;
}
.site-header.scrolled .logo { color: var(--white); }
.main-nav { display: flex; gap: 8px; margin-left: 24px; }
.main-nav .nav-link {
  position: relative;
  padding: 6px 14px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  border-radius: 999px;
  transition: all 0.25s;
}
.main-nav .nav-link:hover { background: rgba(11,59,46,0.08); }
.main-nav .nav-link.active {
  background: var(--white);
  color: var(--primary);
  box-shadow: var(--shadow-sm);
}
.site-header.scrolled .main-nav .nav-link { color: rgba(255,255,255,0.85); }
.site-header.scrolled .main-nav .nav-link:hover { background: rgba(255,255,255,0.12); color: var(--white); }
.site-header.scrolled .main-nav .nav-link.active { background: var(--white); color: var(--primary); }
.header-search {
  display: flex;
  align-items: center;
  background: rgba(255,255,255,0.18);
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: 999px;
  overflow: hidden;
  height: 36px;
  transition: all 0.25s;
}
.site-header:not(.scrolled) .header-search {
  background: rgba(255,255,255,0.85);
  border-color: rgba(255,255,255,0.9);
}
.header-search:focus-within {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(217,242,74,0.35);
}
.header-search input {
  background: transparent;
  border: none;
  outline: none;
  padding: 0 12px;
  font-size: 13px;
  width: 140px;
  color: var(--white);
  height: 100%;
}
.site-header:not(.scrolled) .header-search input { color: var(--primary); }
.header-search input::placeholder { color: rgba(255,255,255,0.5); }
.site-header:not(.scrolled) .header-search input::placeholder { color: rgba(11,59,46,0.4); }
.header-search button {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-size: 13px;
  transition: color 0.2s;
}
.site-header:not(.scrolled) .header-search button { color: var(--primary); }
.btn-header {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  background: var(--accent);
  color: var(--primary);
  font-size: 14px;
  font-weight: 700;
  padding: 0 20px;
  height: 36px;
  border-radius: 999px;
  white-space: nowrap;
  transition: all 0.25s;
}
.btn-header:hover { background: #E4FA68; transform: translateY(-1px); box-shadow: 0 4px 12px rgba(217,242,74,0.3); }
.btn-header:active { transform: translateY(0) scale(0.98); }
.mobile-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 8px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  background: rgba(255,255,255,0.12);
}
.mobile-toggle span {
  width: 18px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: all 0.3s;
}

/* Mobile drawer */
.mobile-drawer {
  position: fixed;
  top: 0;
  right: -100%;
  width: 80%;
  max-width: 360px;
  height: 100vh;
  background: var(--dark);
  z-index: 200;
  transition: right 0.35s ease;
  padding: 24px 28px;
  display: flex;
  flex-direction: column;
  overflow-y: auto;
}
.mobile-drawer.open { right: 0; }
.mobile-drawer .drawer-logo {
  font-size: 22px;
  font-weight: 900;
  color: var(--white);
  margin-bottom: 32px;
}
.mobile-drawer .drawer-nav { display: flex; flex-direction: column; gap: 6px; }
.mobile-drawer .drawer-nav a {
  display: block;
  padding: 14px 16px;
  font-size: 18px;
  font-weight: 600;
  color: rgba(255,255,255,0.85);
  border-radius: 12px;
  transition: background 0.2s;
}
.mobile-drawer .drawer-nav a:hover,
.mobile-drawer .drawer-nav a.active { background: rgba(217,242,74,0.15); color: var(--accent); }
.mobile-drawer .drawer-cta {
  margin-top: 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.drawer-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255,255,255,0.1);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
}
.drawer-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.5);
  z-index: 199;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}
.drawer-overlay.open { opacity: 1; pointer-events: auto; }

/* Buttons */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--accent);
  color: var(--primary);
  font-size: 15px;
  font-weight: 700;
  padding: 0 28px;
  height: 48px;
  border-radius: 999px;
  transition: all 0.25s;
  box-shadow: 0 4px 14px rgba(217,242,74,0.25);
}
.btn-primary:hover { background: #E4FA68; transform: translateY(-2px); box-shadow: 0 8px 20px rgba(217,242,74,0.35); }
.btn-primary:active { transform: translateY(0) scale(0.98); }
.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: transparent;
  color: var(--primary);
  font-size: 15px;
  font-weight: 600;
  padding: 0 28px;
  height: 48px;
  border-radius: 999px;
  border: 2px solid var(--primary);
  transition: all 0.25s;
}
.btn-secondary:hover { background: var(--primary); color: var(--white); }
.btn-secondary:active { transform: scale(0.98); }
.btn-white-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: transparent;
  color: var(--white);
  font-size: 15px;
  font-weight: 600;
  padding: 0 28px;
  height: 48px;
  border-radius: 999px;
  border: 2px solid rgba(255,255,255,0.6);
  transition: all 0.25s;
}
.btn-white-outline:hover { background: rgba(255,255,255,0.1); border-color: var(--white); }
.btn-white-outline:active { transform: scale(0.98); }

/* Section headers */
.section-title {
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 800;
  color: var(--text);
  line-height: 1.3;
  position: relative;
  padding-left: 20px;
  margin-bottom: 16px;
}
.section-title::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  width: 4px;
  height: 100%;
  background: var(--accent);
  border-radius: 2px;
}
.section-sub {
  font-size: 15px;
  color: var(--muted);
  max-width: 560px;
  line-height: 1.7;
}

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  display: grid;
  grid-template-columns: 45% 55%;
  overflow: hidden;
  background: var(--bg);
}
.hero-left {
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 80px 6% 60px 8%;
  z-index: 10;
}
.hero-left h1 {
  font-size: clamp(40px, 5.5vw, 60px);
  font-weight: 900;
  letter-spacing: -0.02em;
  line-height: 1.15;
  color: var(--primary);
  margin-bottom: 20px;
}
.hero-left h1 .accent-text {
  color: var(--primary);
  background: linear-gradient(135deg, var(--accent), #C8E039);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-left .hero-sub {
  font-size: 16px;
  color: var(--muted);
  line-height: 1.8;
  max-width: 420px;
  margin-bottom: 32px;
}
.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
}
.hero-right {
  position: relative;
  background: var(--primary);
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  z-index: 1;
}
.hero-overlay {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(to top, var(--primary) 0%, rgba(11,59,46,0.75) 45%, rgba(11,59,46,0.3) 100%);
  z-index: 2;
}
.hero-divider {
  position: absolute;
  top: 0;
  left: 45%;
  width: 4px;
  height: 100%;
  background: linear-gradient(to bottom, var(--warm), var(--accent));
  z-index: 20;
  transform: translateX(-50%);
}
.hero-float-card {
  position: absolute;
  bottom: 48px;
  right: 48px;
  background: rgba(255,255,255,0.96);
  border-radius: 24px;
  box-shadow: var(--shadow-lg);
  padding: 24px 30px;
  z-index: 30;
  min-width: 180px;
}
.float-score {
  font-size: 40px;
  font-weight: 900;
  color: var(--primary);
  font-variant-numeric: tabular-nums;
  letter-spacing: -1px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
}
.float-score .score-vs {
  font-size: 20px;
  color: var(--muted);
  font-weight: 600;
}
.float-league {
  font-size: 13px;
  color: var(--muted);
  margin-top: 4px;
  text-align: center;
  font-weight: 600;
}
.float-status {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: var(--warm);
  color: var(--white);
  font-size: 11px;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 999px;
  margin-top: 8px;
  text-align: center;
  width: fit-content;
  margin-left: auto;
  margin-right: auto;
}
.hero-scroll {
  position: absolute;
  bottom: 32px;
  left: 6%;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 13px;
  z-index: 10;
  animation: bounceDown 2s infinite;
}
@keyframes bounceDown {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(6px); }
}

/* Steps */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
  position: relative;
}
.step-card {
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 40px 28px;
  position: relative;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s;
  border: 1px solid rgba(11,59,46,0.06);
}
.step-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}
.step-number {
  font-size: 52px;
  font-weight: 900;
  color: var(--accent);
  line-height: 1;
  letter-spacing: -2px;
  opacity: 0.9;
}
.step-card:nth-child(2) .step-number { color: var(--warm); }
.step-icon {
  width: 64px;
  height: 64px;
  border-radius: var(--radius-md);
  background: rgba(11,59,46,0.06);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 20px 0 16px;
  font-size: 22px;
  color: var(--primary);
}
.step-card h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text);
}
.step-card p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.7;
}
.steps-connector {
  display: none;
}

/* Cases */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.case-card {
  background: var(--white);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all 0.3s;
  border: 1px solid rgba(11,59,46,0.06);
}
.case-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-4px);
}
.case-card:hover .case-img img { transform: scale(1.04); }
.case-img {
  height: 180px;
  overflow: hidden;
}
.case-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.case-body { padding: 24px; }
.case-body h3 {
  font-size: 18px;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text);
}
.case-body p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.7;
  margin-bottom: 16px;
}
.case-metric {
  display: flex;
  align-items: center;
  gap: 8px;
  border-top: 1px solid rgba(11,59,46,0.08);
  padding-top: 14px;
}
.case-metric .value {
  font-size: 20px;
  font-weight: 900;
  color: var(--warm);
  font-variant-numeric: tabular-nums;
}
.case-metric .label {
  font-size: 13px;
  color: var(--muted);
}

/* News */
.news-section {
  background: rgba(11,59,46,0.04);
  border-radius: var(--radius-lg);
  padding: 48px;
  margin-top: 24px;
}
.news-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 32px;
}
.news-card {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  background: var(--white);
  border-radius: var(--radius-md);
  padding: 20px;
  box-shadow: var(--shadow-sm);
  transition: all 0.25s;
  border: 1px solid rgba(11,59,46,0.06);
}
.news-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateX(4px);
}
.news-thumb {
  flex: 0 0 112px;
  height: 80px;
  border-radius: 12px;
  overflow: hidden;
}
.news-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.news-body { flex: 1; min-width: 0; }
.news-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 6px;
}
.badge {
  display: inline-flex;
  align-items: center;
  background: rgba(11,59,46,0.08);
  color: var(--primary);
  font-size: 12px;
  font-weight: 600;
  padding: 2px 10px;
  border-radius: 999px;
}
.news-date {
  font-size: 12px;
  color: var(--muted);
}
.news-title {
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.5;
  margin-bottom: 6px;
}
.news-title a:hover { color: var(--primary); }
.news-summary {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.6;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.news-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  margin-top: 8px;
  transition: gap 0.2s;
}
.news-link:hover { gap: 8px; }
.news-empty {
  text-align: center;
  padding: 48px 24px;
  color: var(--muted);
  font-size: 15px;
  background: var(--white);
  border-radius: var(--radius-md);
}

/* FAQ */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}
.faq-item {
  background: var(--white);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(11,59,46,0.06);
  margin-bottom: 14px;
  overflow: hidden;
  transition: box-shadow 0.3s;
}
.faq-item.open { box-shadow: var(--shadow-md); }
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  transition: background 0.2s;
}
.faq-question:hover { background: rgba(11,59,46,0.02); }
.faq-icon {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
  border-radius: 50%;
  border: 2px solid var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  color: var(--primary);
  transition: all 0.3s;
}
.faq-item.open .faq-icon {
  transform: rotate(45deg);
  background: var(--primary);
  color: var(--white);
  border-color: var(--primary);
}
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
  padding: 0 24px;
}
.faq-item.open .faq-answer {
  max-height: 200px;
  padding-bottom: 20px;
}
.faq-answer p {
  font-size: 14px;
  color: var(--muted);
  line-height: 1.7;
  border-top: 1px solid rgba(11,59,46,0.06);
  padding-top: 16px;
}

/* CTA */
.cta-section {
  position: relative;
  background: var(--dark);
  border-radius: var(--radius-lg);
  padding: 72px 56px;
  text-align: center;
  overflow: hidden;
}
.cta-bg {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background-image: url('/assets/images/backpic/back-2.webp');
  background-size: cover;
  background-position: center;
  opacity: 0.25;
  z-index: 0;
}
.cta-section::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  background: linear-gradient(135deg, rgba(12,29,24,0.92), rgba(11,59,46,0.85));
  z-index: 1;
}
.cta-content { position: relative; z-index: 2; }
.cta-content h2 {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 800;
  color: var(--white);
  margin-bottom: 12px;
}
.cta-content p {
  font-size: 15px;
  color: rgba(255,255,255,0.7);
  max-width: 480px;
  margin: 0 auto 32px;
  line-height: 1.7;
}
.cta-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 40px;
}
.cta-trust {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  border-top: 1px solid rgba(255,255,255,0.12);
  padding-top: 32px;
  max-width: 700px;
  margin: 0 auto;
}
.trust-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: rgba(255,255,255,0.8);
  font-size: 13px;
  font-weight: 600;
}
.trust-item i {
  font-size: 20px;
  color: var(--accent);
}

/* Footer */
.site-footer {
  background: var(--dark);
  color: rgba(255,255,255,0.7);
  padding: 64px 0 0;
  margin-top: 80px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 48px;
}
.footer-logo {
  font-size: 22px;
  font-weight: 900;
  color: var(--white);
  margin-bottom: 12px;
}
.footer-brand p {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255,255,255,0.5);
  max-width: 260px;
}
.footer-heading {
  font-size: 15px;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 16px;
}
.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-links a {
  font-size: 14px;
  color: rgba(255,255,255,0.6);
  transition: color 0.2s;
}
.footer-links a:hover { color: var(--accent); }
.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 14px;
  color: rgba(255,255,255,0.6);
}
.footer-contact i {
  width: 20px;
  color: var(--accent);
  margin-right: 6px;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  color: rgba(255,255,255,0.4);
}

/* Floating */
.float-btn {
  position: fixed;
  bottom: 32px;
  right: 32px;
  z-index: 150;
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background: var(--warm);
  color: var(--white);
  font-size: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 6px 20px rgba(255,107,26,0.4);
  transition: all 0.25s;
}
.float-btn:hover {
  transform: translateY(-3px);
  box-shadow: 0 10px 28px rgba(255,107,26,0.5);
}

/* Responsive */
@media (max-width: 1024px) {
  .hero-left h1 { font-size: 44px; }
  .header-search input { width: 100px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .site-header { position: absolute; }
  .header-left { flex: 1; background: var(--primary); padding: 0 16px; }
  .header-right { flex: 0; background: var(--primary); padding: 0 16px; }
  .site-header .logo { color: var(--white); font-size: 18px; }
  .main-nav { display: none; }
  .header-search { display: none; }
  .btn-header { display: none; }
  .mobile-toggle { display: flex; }
  .hero { grid-template-columns: 1fr; min-height: auto; }
  .hero-left { padding: 72px 24px 200px; min-height: 70vh; }
  .hero-right { height: 55vh; }
  .hero-divider { display: none; }
  .hero-left h1 { font-size: 40px; }
  .hero-float-card { bottom: 24px; right: 24px; left: 24px; min-width: auto; }
  .steps-grid { grid-template-columns: 1fr; }
  .cases-grid { grid-template-columns: 1fr; }
  .news-section { padding: 24px; }
  .news-thumb { flex-basis: 80px; height: 64px; }
  .cta-section { padding: 48px 24px; }
  .cta-trust { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
}
@media (max-width: 520px) {
  .hero-left h1 { font-size: 32px; }
  .hero-left { padding: 56px 20px 180px; }
  .section-title { font-size: 22px; }
  .case-img { height: 160px; }
  .news-thumb { display: none; }
  .news-card { padding: 16px; }
  .cta-actions .btn-primary,
  .cta-actions .btn-white-outline { width: 100%; }
}

/* Accessibility */
:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}
a, button { -webkit-tap-highlight-color: transparent; }

/* roulang page: category1 */
:root {
      --primary: #0B3B2E;
      --accent: #D9F24A;
      --warm: #FF6B1A;
      --bg: #F4F6F2;
      --dark: #0C1D18;
      --text: #16231E;
      --muted: #5C6B64;
      --line: #E3E8E4;
      --radius-sm: 8px;
      --radius-md: 16px;
      --radius-lg: 24px;
      --shadow-sm: 0 2px 8px rgba(11, 59, 46, 0.06);
      --shadow-md: 0 8px 24px rgba(11, 59, 46, 0.10);
      --shadow-lg: 0 24px 48px rgba(11, 59, 46, 0.16);
    }

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

    html {
      scroll-behavior: smooth;
    }

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

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

    a {
      text-decoration: none;
      color: inherit;
      transition: color 0.3s ease;
    }

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

    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding-left: 1rem;
      padding-right: 1rem;
    }

    @media (min-width: 768px) {
      .container {
        padding-left: 1.5rem;
        padding-right: 1.5rem;
      }
    }

    /* ---------- Header Nav ---------- */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: var(--primary);
      box-shadow: 0 2px 12px rgba(11, 59, 46, 0.25);
    }

    .nav-wrap {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 64px;
      gap: 1rem;
    }

    .site-logo {
      font-size: 1.35rem;
      font-weight: 900;
      letter-spacing: -0.01em;
      color: #fff;
      flex-shrink: 0;
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .site-logo i {
      color: var(--accent);
      font-size: 1.5rem;
    }

    .main-nav {
      display: flex;
      align-items: center;
      gap: 0.5rem;
      flex: 1;
      justify-content: center;
    }

    .nav-link {
      display: inline-flex;
      align-items: center;
      padding: 0.5rem 1.1rem;
      border-radius: 999px;
      font-weight: 600;
      font-size: 0.95rem;
      color: rgba(255, 255, 255, 0.8);
      transition: all 0.3s ease;
      white-space: nowrap;
    }

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

    .nav-link.active {
      background: #fff;
      color: var(--primary);
      font-weight: 700;
      box-shadow: 0 2px 10px rgba(217, 242, 74, 0.25);
    }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 0.75rem;
      flex-shrink: 0;
    }

    .nav-search {
      display: none;
      align-items: center;
      gap: 0.5rem;
      background: rgba(255, 255, 255, 0.12);
      border: 1px solid rgba(255, 255, 255, 0.2);
      border-radius: 999px;
      padding: 0.35rem 0.9rem;
      color: rgba(255, 255, 255, 0.85);
      transition: all 0.3s ease;
    }

    .nav-search:hover {
      background: rgba(255, 255, 255, 0.18);
    }

    .nav-search input {
      background: transparent;
      border: none;
      outline: none;
      color: #fff;
      font-size: 0.85rem;
      width: 90px;
    }

    .nav-search input::placeholder {
      color: rgba(255, 255, 255, 0.55);
    }

    .nav-search input:focus {
      border: none;
      box-shadow: none;
    }

    .nav-search:focus-within {
      border-color: var(--accent);
      box-shadow: 0 0 0 3px rgba(217, 242, 74, 0.3);
    }

    .btn-sm {
      display: inline-flex;
      align-items: center;
      gap: 0.4rem;
      background: var(--accent);
      color: var(--primary);
      font-weight: 700;
      font-size: 0.9rem;
      padding: 0.45rem 1.2rem;
      border-radius: 999px;
      transition: all 0.3s ease;
      white-space: nowrap;
    }

    .btn-sm:hover {
      transform: translateY(-1px);
      box-shadow: 0 4px 14px rgba(217, 242, 74, 0.35);
    }

    .menu-toggle {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 44px;
      height: 44px;
      border-radius: 10px;
      background: rgba(255, 255, 255, 0.1);
      color: #fff;
      font-size: 1.3rem;
      border: 1px solid rgba(255, 255, 255, 0.15);
    }

    @media (min-width: 768px) {
      .nav-search {
        display: flex;
      }
      .menu-toggle {
        display: none;
      }
    }

    @media (max-width: 767px) {
      .main-nav {
        position: fixed;
        top: 0;
        right: 0;
        width: 80%;
        max-width: 340px;
        height: 100vh;
        height: 100dvh;
        background: var(--dark);
        flex-direction: column;
        justify-content: flex-start;
        align-items: stretch;
        padding: 4.5rem 2rem 2rem;
        gap: 0.75rem;
        transform: translateX(100%);
        transition: transform 0.4s ease;
        z-index: 120;
        box-shadow: -8px 0 32px rgba(0, 0, 0, 0.3);
      }

      .main-nav.open {
        transform: translateX(0);
      }

      .nav-link {
        font-size: 1.1rem;
        padding: 0.9rem 1.2rem;
        color: rgba(255, 255, 255, 0.85);
        border-radius: 12px;
      }

      .nav-link.active {
        background: rgba(217, 242, 74, 0.15);
        color: var(--accent);
      }

      .nav-link:hover {
        background: rgba(255, 255, 255, 0.08);
        color: #fff;
      }

      .nav-backdrop {
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.5);
        z-index: 110;
        display: none;
      }

      .nav-backdrop.show {
        display: block;
      }

      .btn-sm {
        font-size: 0.85rem;
        padding: 0.4rem 1rem;
      }
    }

    /* ---------- Page Hero ---------- */
    .page-hero {
      position: relative;
      background: var(--primary);
      color: #fff;
      padding: 5rem 0 4rem;
      overflow: hidden;
    }

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

    .page-hero::after {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(100deg, var(--primary) 0%, rgba(11, 59, 46, 0.88) 45%, rgba(11, 59, 46, 0.55) 70%, rgba(11, 59, 46, 0.8) 100%);
    }

    .hero-content {
      position: relative;
      z-index: 2;
      max-width: 780px;
    }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      background: rgba(217, 242, 74, 0.15);
      border: 1px solid rgba(217, 242, 74, 0.4);
      color: var(--accent);
      font-size: 0.85rem;
      font-weight: 600;
      padding: 0.3rem 1rem;
      border-radius: 999px;
      margin-bottom: 1.25rem;
    }

    .hero-title {
      font-size: clamp(2.2rem, 5vw, 3.2rem);
      font-weight: 900;
      line-height: 1.2;
      letter-spacing: -0.02em;
      margin-bottom: 1.25rem;
    }

    .hero-title .highlight {
      color: var(--accent);
    }

    .hero-desc {
      font-size: 1.05rem;
      line-height: 1.8;
      color: rgba(255, 255, 255, 0.85);
      margin-bottom: 2rem;
      max-width: 640px;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 1rem;
    }

    .btn-primary,
    .btn-secondary,
    .btn-outline-light {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 0.5rem;
      height: 44px;
      padding: 0 1.5rem;
      border-radius: 999px;
      font-weight: 700;
      font-size: 0.95rem;
      transition: all 0.3s ease;
    }

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

    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 24px rgba(217, 242, 74, 0.35);
    }

    .btn-primary:active {
      transform: translateY(0) scale(0.98);
    }

    .btn-secondary {
      background: transparent;
      border: 2px solid rgba(255, 255, 255, 0.6);
      color: #fff;
    }

    .btn-secondary:hover {
      background: rgba(255, 255, 255, 0.1);
      border-color: #fff;
    }

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

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

    .hero-meta {
      display: flex;
      flex-wrap: wrap;
      gap: 1.5rem;
      margin-top: 2.5rem;
      padding-top: 1.5rem;
      border-top: 1px solid rgba(255, 255, 255, 0.15);
    }

    .hero-meta-item {
      display: flex;
      align-items: center;
      gap: 0.6rem;
      font-size: 0.9rem;
      color: rgba(255, 255, 255, 0.75);
    }

    .hero-meta-item i {
      color: var(--accent);
      font-size: 1.1rem;
    }

    /* ---------- Section Base ---------- */
    .section {
      padding: 4.5rem 0;
    }

    .section-label {
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--primary);
      background: rgba(11, 59, 46, 0.06);
      padding: 0.25rem 0.85rem;
      border-radius: 999px;
      margin-bottom: 0.75rem;
      letter-spacing: 0.02em;
    }

    .section-title-wrap {
      display: flex;
      align-items: flex-end;
      justify-content: space-between;
      gap: 1rem;
      margin-bottom: 2.5rem;
      flex-wrap: wrap;
    }

    .section-title {
      font-size: clamp(1.5rem, 3vw, 2rem);
      font-weight: 800;
      line-height: 1.3;
      color: var(--text);
      position: relative;
      padding-left: 1.2rem;
    }

    .section-title::before {
      content: '';
      position: absolute;
      left: 0;
      top: 0.28em;
      width: 6px;
      height: 1.1em;
      background: var(--accent);
      border-radius: 3px;
    }

    /* ---------- Sports Grid ---------- */
    .sports-grid {
      background: var(--bg);
    }

    .grid-cards {
      display: grid;
      grid-template-columns: 1fr;
      gap: 1.5rem;
    }

    @media (min-width: 768px) {
      .grid-cards {
        grid-template-columns: repeat(2, 1fr);
      }
    }

    @media (min-width: 1024px) {
      .grid-cards {
        grid-template-columns: repeat(3, 1fr);
      }
    }

    .sport-card {
      background: #fff;
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: all 0.35s ease;
      border: 1px solid transparent;
    }

    .sport-card:hover {
      transform: translateY(-6px);
      box-shadow: var(--shadow-md);
      border-color: rgba(11, 59, 46, 0.08);
    }

    .sport-card.lg-span {
      grid-column: span 1;
    }

    @media (min-width: 1024px) {
      .sport-card.lg-span {
        grid-column: span 2;
      }
    }

    .sport-card-media {
      position: relative;
      height: 180px;
      overflow: hidden;
      background: rgba(11, 59, 46, 0.08);
    }

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

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

    .sport-tag {
      position: absolute;
      top: 0.85rem;
      left: 0.85rem;
      background: rgba(11, 59, 46, 0.85);
      color: #fff;
      font-size: 0.75rem;
      font-weight: 700;
      padding: 0.2rem 0.7rem;
      border-radius: 999px;
      backdrop-filter: blur(4px);
    }

    .sport-hot {
      position: absolute;
      top: 0.85rem;
      right: 0.85rem;
      background: var(--warm);
      color: #fff;
      font-size: 0.75rem;
      font-weight: 700;
      padding: 0.2rem 0.7rem;
      border-radius: 999px;
    }

    .sport-card-body {
      padding: 1.25rem 1.25rem 1.5rem;
    }

    .sport-card-body h3 {
      font-size: 1.1rem;
      font-weight: 700;
      color: var(--text);
      margin-bottom: 0.5rem;
    }

    .sport-card-body p {
      font-size: 0.9rem;
      color: var(--muted);
      line-height: 1.7;
      margin-bottom: 0.85rem;
    }

    .sport-card-link {
      display: inline-flex;
      align-items: center;
      gap: 0.35rem;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--primary);
    }

    .sport-card-link i {
      font-size: 0.75rem;
      transition: transform 0.3s ease;
    }

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

    /* ---------- Features ---------- */
    .features-section {
      background: #fff;
      border-top: 1px solid var(--line);
      border-bottom: 1px solid var(--line);
    }

    .features-grid {
      display: grid;
      grid-template-columns: 1fr;
      gap: 1.5rem;
    }

    @media (min-width: 768px) {
      .features-grid {
        grid-template-columns: repeat(4, 1fr);
      }
    }

    .feature-item {
      padding: 1.5rem;
      border-radius: var(--radius-md);
      background: var(--bg);
      border: 1px solid var(--line);
      transition: all 0.3s ease;
    }

    .feature-item:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-sm);
      border-color: rgba(11, 59, 46, 0.15);
    }

    .feature-icon {
      width: 56px;
      height: 56px;
      border-radius: 14px;
      background: rgba(11, 59, 46, 0.08);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      color: var(--primary);
      margin-bottom: 1rem;
    }

    .feature-item h3 {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text);
      margin-bottom: 0.45rem;
    }

    .feature-item p {
      font-size: 0.85rem;
      color: var(--muted);
      line-height: 1.7;
    }

    /* ---------- Stats ---------- */
    .stats-section {
      background: var(--dark);
      position: relative;
      overflow: hidden;
    }

    .stats-bg {
      position: absolute;
      inset: 0;
      background-image: url('/assets/images/backpic/back-2.webp');
      background-size: cover;
      background-position: center;
      opacity: 0.15;
    }

    .stats-wrap {
      position: relative;
      z-index: 2;
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 2rem;
      text-align: center;
    }

    @media (min-width: 768px) {
      .stats-wrap {
        grid-template-columns: repeat(4, 1fr);
      }
    }

    .stat-item .num {
      font-size: 2.4rem;
      font-weight: 900;
      color: var(--warm);
      font-variant-numeric: tabular-nums;
      font-variant-numeric: tabular-nums;
      display: block;
      line-height: 1.2;
    }

    .stat-item .label {
      font-size: 0.9rem;
      color: rgba(255, 255, 255, 0.7);
      margin-top: 0.35rem;
      display: block;
    }

    /* ---------- Process ---------- */
    .process-section {
      background: var(--bg);
    }

    .process-grid {
      display: grid;
      grid-template-columns: 1fr;
      gap: 1.5rem;
    }

    @media (min-width: 768px) {
      .process-grid {
        grid-template-columns: repeat(4, 1fr);
      }
    }

    .process-step {
      background: #fff;
      border-radius: var(--radius-md);
      padding: 1.75rem 1.25rem;
      box-shadow: var(--shadow-sm);
      position: relative;
      text-align: left;
      transition: all 0.3s ease;
    }

    .process-step:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-4px);
    }

    .step-num {
      font-size: 2rem;
      font-weight: 900;
      color: var(--accent);
      display: block;
      margin-bottom: 0.75rem;
      font-variant-numeric: tabular-nums;
    }

    .process-step h3 {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text);
      margin-bottom: 0.4rem;
    }

    .process-step p {
      font-size: 0.85rem;
      color: var(--muted);
      line-height: 1.7;
    }

    .step-arrow {
      display: none;
      position: absolute;
      top: 50%;
      right: -1rem;
      transform: translateY(-50%);
      color: var(--warm);
      font-size: 1rem;
      z-index: 3;
    }

    @media (min-width: 1024px) {
      .step-arrow {
        display: block;
      }
    }

    /* ---------- FAQ ---------- */
    .faq-section {
      background: #fff;
      border-top: 1px solid var(--line);
    }

    .faq-list {
      max-width: 820px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 0.85rem;
    }

    .faq-item {
      background: var(--bg);
      border-radius: var(--radius-md);
      border: 1px solid var(--line);
      overflow: hidden;
      transition: all 0.3s ease;
    }

    .faq-item.active {
      border-color: rgba(11, 59, 46, 0.2);
      box-shadow: var(--shadow-sm);
    }

    .faq-question {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 1rem;
      padding: 1.1rem 1.25rem;
      font-weight: 600;
      font-size: 0.95rem;
      color: var(--text);
      background: transparent;
      width: 100%;
      text-align: left;
      transition: background 0.3s ease;
      border-radius: var(--radius-md);
    }

    .faq-question:hover {
      background: rgba(11, 59, 46, 0.04);
    }

    .faq-icon {
      width: 32px;
      height: 32px;
      border-radius: 50%;
      border: 2px solid var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1rem;
      color: var(--primary);
      flex-shrink: 0;
      transition: all 0.4s ease;
      font-weight: 700;
    }

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

    .faq-answer-wrap {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.4s ease;
    }

    .faq-answer {
      padding: 0 1.25rem 1.1rem;
      color: var(--muted);
      font-size: 0.9rem;
      line-height: 1.75;
    }

    /* ---------- CTA ---------- */
    .cta-section {
      background: var(--primary);
      position: relative;
      overflow: hidden;
      padding: 5rem 0;
    }

    .cta-bg {
      position: absolute;
      inset: 0;
      background-image: url('/assets/images/backpic/back-3.webp');
      background-size: cover;
      background-position: center;
      opacity: 0.2;
    }

    .cta-section::after {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(90deg, var(--primary) 0%, rgba(11, 59, 46, 0.85) 100%);
    }

    .cta-wrap {
      position: relative;
      z-index: 2;
      text-align: center;
      max-width: 680px;
      margin: 0 auto;
    }

    .cta-wrap h2 {
      font-size: clamp(1.6rem, 3.5vw, 2.4rem);
      font-weight: 800;
      color: #fff;
      margin-bottom: 0.75rem;
    }

    .cta-wrap p {
      color: rgba(255, 255, 255, 0.8);
      font-size: 1rem;
      margin-bottom: 2rem;
      line-height: 1.7;
    }

    .cta-actions {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 1rem;
      margin-bottom: 2.25rem;
    }

    .cta-trust {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 1.5rem;
      border-top: 1px solid rgba(255, 255, 255, 0.15);
      padding-top: 1.5rem;
    }

    .trust-item {
      display: flex;
      align-items: center;
      gap: 0.5rem;
      color: rgba(255, 255, 255, 0.75);
      font-size: 0.85rem;
      font-weight: 500;
    }

    .trust-item i {
      color: var(--accent);
    }

    /* ---------- Footer ---------- */
    .site-footer {
      background: var(--dark);
      color: rgba(255, 255, 255, 0.7);
      padding: 3.5rem 0 1.5rem;
      font-size: 0.9rem;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1fr;
      gap: 2rem;
      margin-bottom: 2.5rem;
    }

    @media (min-width: 768px) {
      .footer-grid {
        grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
      }
    }

    .footer-logo {
      font-size: 1.3rem;
      font-weight: 900;
      color: #fff;
      margin-bottom: 0.75rem;
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }

    .footer-logo i {
      color: var(--accent);
    }

    .footer-brand p {
      font-size: 0.85rem;
      line-height: 1.8;
      color: rgba(255, 255, 255, 0.55);
      max-width: 280px;
    }

    .footer-heading {
      font-size: 0.95rem;
      font-weight: 700;
      color: #fff;
      margin-bottom: 1rem;
      position: relative;
      padding-bottom: 0.5rem;
    }

    .footer-heading::after {
      content: '';
      position: absolute;
      bottom: 0;
      left: 0;
      width: 24px;
      height: 3px;
      background: var(--accent);
      border-radius: 2px;
    }

    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 0.5rem;
    }

    .footer-links a {
      color: rgba(255, 255, 255, 0.55);
      transition: color 0.3s ease;
      font-size: 0.88rem;
    }

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

    .footer-contact {
      display: flex;
      flex-direction: column;
      gap: 0.65rem;
      font-size: 0.85rem;
      color: rgba(255, 255, 255, 0.55);
    }

    .footer-contact span {
      display: flex;
      align-items: center;
      gap: 0.5rem;
    }

    .footer-contact i {
      color: var(--accent);
      width: 16px;
      text-align: center;
    }

    .footer-bottom {
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: space-between;
      gap: 0.5rem;
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding-top: 1.5rem;
      font-size: 0.8rem;
      color: rgba(255, 255, 255, 0.4);
    }

    @media (min-width: 768px) {
      .footer-bottom {
        flex-direction: row;
      }
    }

    /* ---------- Breadcrumb ---------- */
    .breadcrumb {
      display: flex;
      align-items: center;
      gap: 0.5rem;
      font-size: 0.82rem;
      color: rgba(255, 255, 255, 0.6);
      margin-bottom: 1.25rem;
      flex-wrap: wrap;
    }

    .breadcrumb a {
      color: rgba(255, 255, 255, 0.6);
    }

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

    .breadcrumb span {
      color: rgba(255, 255, 255, 0.4);
    }

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

/* roulang page: article */
:root {
            --primary: #0B3B2E;
            --accent: #D9F24A;
            --warm: #FF6B1A;
            --bg: #F4F6F2;
            --dark: #0C1D18;
            --text: #16231E;
            --muted: #5C6B64;
            --white: #FFFFFF;
            --radius-sm: 8px;
            --radius-md: 16px;
            --radius-lg: 24px;
            --shadow-sm: 0 2px 8px rgba(11, 59, 46, 0.06);
            --shadow-md: 0 8px 24px rgba(11, 59, 46, 0.10);
            --shadow-lg: 0 24px 48px rgba(11, 59, 46, 0.16);
        }
        *,
        *::before,
        *::after {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html {
            scroll-behavior: smooth;
        }
        body {
            font-family: 'PingFang SC', 'HarmonyOS Sans SC', 'Microsoft YaHei', system-ui, sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }
        a {
            text-decoration: none;
            color: inherit;
        }
        img {
            max-width: 100%;
            display: block;
        }
        ul,
        ol {
            list-style: none;
        }
        button {
            border: none;
            background: none;
            cursor: pointer;
            font: inherit;
            color: inherit;
        }
        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (min-width: 768px) {
            .container {
                padding: 0 32px;
            }
        }

        /* ===== 按钮 ===== */
        .btn-primary {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            background: var(--accent);
            color: var(--primary);
            font-weight: 700;
            font-size: 15px;
            border-radius: 999px;
            padding: 0 28px;
            height: 48px;
            transition: all .25s ease;
            border: 2px solid transparent;
        }
        .btn-primary:hover {
            filter: brightness(1.08);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        .btn-primary:active {
            transform: translateY(0) scale(.98);
        }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border: 2px solid var(--primary);
            color: var(--primary);
            font-weight: 700;
            font-size: 15px;
            border-radius: 999px;
            padding: 0 28px;
            height: 48px;
            transition: all .25s ease;
            background: transparent;
        }
        .btn-outline:hover {
            background: var(--primary);
            color: #fff;
        }
        .btn-outline-light {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 8px;
            border: 2px solid rgba(255, 255, 255, .6);
            color: #fff;
            font-weight: 700;
            font-size: 15px;
            border-radius: 999px;
            padding: 0 28px;
            height: 48px;
            transition: all .25s ease;
            background: transparent;
        }
        .btn-outline-light:hover {
            background: rgba(255, 255, 255, .12);
        }

        /* ===== 导航 ===== */
        .site-header {
            position: sticky;
            top: 0;
            z-index: 100;
            background: var(--dark);
            border-bottom: 1px solid rgba(255, 255, 255, .08);
            transition: box-shadow .3s ease;
        }
        .site-header.scrolled {
            box-shadow: 0 4px 24px rgba(0, 0, 0, .18);
        }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 64px;
            gap: 24px;
        }
        .header-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            flex-shrink: 0;
        }
        .logo-mark {
            width: 36px;
            height: 36px;
            border-radius: 10px;
            background: var(--accent);
            color: var(--primary);
            font-weight: 900;
            font-size: 15px;
            display: flex;
            align-items: center;
            justify-content: center;
            letter-spacing: -0.02em;
        }
        .logo-text {
            color: #fff;
            font-weight: 800;
            font-size: 20px;
            letter-spacing: -0.01em;
        }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 4px;
            margin-left: 16px;
        }
        .nav-link {
            color: rgba(255, 255, 255, .78);
            font-size: 15px;
            font-weight: 500;
            padding: 8px 18px;
            border-radius: 999px;
            transition: all .2s ease;
            line-height: 1.4;
        }
        .nav-link:hover {
            color: #fff;
            background: rgba(255, 255, 255, .08);
        }
        .nav-link.active {
            background: var(--accent);
            color: var(--primary);
            font-weight: 700;
        }
        .header-actions {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-left: auto;
        }
        .btn-header {
            height: 40px;
            padding: 0 22px;
            border-radius: 999px;
            background: var(--accent);
            color: var(--primary);
            font-weight: 700;
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: all .25s ease;
            border: 2px solid transparent;
        }
        .btn-header:hover {
            filter: brightness(1.08);
            transform: translateY(-1px);
            box-shadow: 0 4px 16px rgba(217, 242, 74, .25);
        }
        .nav-toggle {
            display: none;
            width: 44px;
            height: 44px;
            border-radius: 12px;
            align-items: center;
            justify-content: center;
            flex-direction: column;
            gap: 5px;
            background: rgba(255, 255, 255, .06);
            border: 1px solid rgba(255, 255, 255, .12);
        }
        .nav-toggle span {
            display: block;
            width: 18px;
            height: 2px;
            border-radius: 2px;
            background: #fff;
            transition: all .3s ease;
        }
        .nav-toggle.open span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .nav-toggle.open span:nth-child(2) {
            opacity: 0;
        }
        .nav-toggle.open span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }
        .mobile-drawer {
            display: none;
            position: fixed;
            inset: 0;
            background: var(--dark);
            z-index: 99;
            flex-direction: column;
            padding: 20px 28px 40px;
            padding-top: calc(64px + 20px);
            overflow-y: auto;
        }
        .mobile-drawer.open {
            display: flex;
        }
        .drawer-nav {
            display: flex;
            flex-direction: column;
            gap: 4px;
            margin-top: 16px;
        }
        .drawer-link {
            font-size: 20px;
            font-weight: 600;
            color: rgba(255, 255, 255, .8);
            padding: 16px 8px;
            border-bottom: 1px solid rgba(255, 255, 255, .08);
            transition: all .2s;
        }
        .drawer-link:hover {
            color: var(--accent);
            padding-left: 16px;
        }
        .drawer-link.active {
            color: var(--accent);
        }
        .drawer-cta {
            margin-top: 32px;
            height: 52px;
            border-radius: 999px;
            background: var(--accent);
            color: var(--primary);
            font-weight: 800;
            font-size: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all .25s;
        }
        .drawer-cta:hover {
            filter: brightness(1.08);
        }

        /* ===== 面包屑 ===== */
        .breadcrumb-area {
            background: var(--white);
            border-bottom: 1px solid #e5eae4;
            padding: 16px 0;
        }
        .breadcrumb {
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
            font-size: 14px;
            color: var(--muted);
        }
        .breadcrumb a {
            transition: color .2s;
        }
        .breadcrumb a:hover {
            color: var(--primary);
        }
        .breadcrumb .sep {
            color: #b8c3bc;
        }
        .breadcrumb .current {
            color: var(--text);
            font-weight: 500;
            max-width: 280px;
            white-space: nowrap;
            overflow: hidden;
            text-overflow: ellipsis;
        }

        /* ===== 文章主体 ===== */
        .article-section {
            padding: 48px 0 56px;
        }
        .article-card {
            background: var(--white);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            padding: 32px 24px 48px;
            max-width: 860px;
            margin: 0 auto;
        }
        .article-header {
            text-align: left;
            margin-bottom: 36px;
            padding-bottom: 28px;
            border-bottom: 1px solid #eef1ec;
        }
        .category-badge {
            display: inline-flex;
            align-items: center;
            background: var(--accent);
            color: var(--primary);
            font-weight: 700;
            font-size: 13px;
            padding: 5px 16px;
            border-radius: 999px;
            margin-bottom: 16px;
            letter-spacing: .02em;
        }
        .article-title {
            font-size: clamp(26px, 4vw, 36px);
            font-weight: 800;
            color: var(--primary);
            line-height: 1.35;
            letter-spacing: -0.01em;
            margin-bottom: 16px;
        }
        .article-meta {
            display: flex;
            align-items: center;
            gap: 20px;
            flex-wrap: wrap;
            color: var(--muted);
            font-size: 14px;
        }
        .article-meta i {
            margin-right: 6px;
            color: var(--warm);
        }
        .article-meta span {
            display: inline-flex;
            align-items: center;
        }
        .article-content {
            font-size: 17px;
            line-height: 1.9;
            color: var(--text);
        }
        .article-content h1,
        .article-content h2,
        .article-content h3,
        .article-content h4 {
            color: var(--primary);
            font-weight: 800;
            line-height: 1.4;
            margin-top: 40px;
            margin-bottom: 16px;
        }
        .article-content h1 {
            font-size: 28px;
        }
        .article-content h2 {
            font-size: 24px;
            border-left: 4px solid var(--accent);
            padding-left: 14px;
        }
        .article-content h3 {
            font-size: 20px;
        }
        .article-content h4 {
            font-size: 18px;
        }
        .article-content p {
            margin-bottom: 24px;
        }
        .article-content a {
            color: var(--primary);
            border-bottom: 1px solid var(--accent);
        }
        .article-content ul,
        .article-content ol {
            margin: 0 0 24px;
            padding-left: 24px;
        }
        .article-content ul {
            list-style: disc;
        }
        .article-content ol {
            list-style: decimal;
        }
        .article-content li {
            margin-bottom: 8px;
        }
        .article-content img {
            border-radius: var(--radius-md);
            margin: 32px 0;
            box-shadow: var(--shadow-sm);
        }
        .article-content blockquote {
            border-left: 4px solid var(--accent);
            background: #edf3e8;
            padding: 20px 24px;
            border-radius: 0 var(--radius-md) var(--radius-md) 0;
            margin: 28px 0;
            color: #33423a;
            font-size: 16px;
        }
        .article-content blockquote p {
            margin-bottom: 0;
        }
        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 28px 0;
            font-size: 15px;
            overflow: hidden;
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
        }
        .article-content th,
        .article-content td {
            padding: 12px 16px;
            border: 1px solid #e5eae4;
            text-align: left;
        }
        .article-content th {
            background: var(--primary);
            color: #fff;
            font-weight: 600;
        }
        .article-content tr:nth-child(even) {
            background: #f8faf7;
        }
        .article-content code {
            background: #eef1ec;
            padding: 2px 8px;
            border-radius: 6px;
            font-size: 14px;
            font-family: 'SFMono-Regular', Consolas, monospace;
        }
        .article-content pre {
            background: #0d1f1a;
            color: #d5e6dd;
            border-radius: var(--radius-md);
            padding: 20px 24px;
            overflow-x: auto;
            margin: 28px 0;
            font-size: 14px;
            line-height: 1.7;
        }
        .article-content pre code {
            background: none;
            color: inherit;
            padding: 0;
        }

        /* ===== 内容未找到 ===== */
        .not-found-card {
            background: var(--white);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow-sm);
            max-width: 860px;
            margin: 0 auto;
            padding: 80px 40px;
            text-align: center;
        }
        .not-found-icon {
            width: 72px;
            height: 72px;
            border-radius: 50%;
            background: #edf3e8;
            color: var(--primary);
            font-size: 28px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 24px;
        }
        .not-found-card h1 {
            font-size: 28px;
            font-weight: 800;
            color: var(--primary);
            margin-bottom: 12px;
        }
        .not-found-card p {
            color: var(--muted);
            margin-bottom: 28px;
            font-size: 15px;
        }

        /* ===== 返回列表 ===== */
        .back-list {
            max-width: 860px;
            margin: 28px auto 0;
            text-align: center;
        }
        .back-list a {
            color: var(--muted);
            font-size: 14px;
            transition: color .2s;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .back-list a:hover {
            color: var(--primary);
        }

        /* ===== 相关阅读 ===== */
        .related-section {
            background: var(--bg);
            padding: 64px 0;
        }
        .section-head {
            display: flex;
            align-items: center;
            gap: 14px;
            margin-bottom: 32px;
        }
        .section-mark {
            width: 28px;
            height: 4px;
            border-radius: 4px;
            background: var(--accent);
            display: inline-block;
            flex-shrink: 0;
        }
        .section-head h2 {
            font-size: 28px;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: -0.01em;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .related-card {
            background: var(--white);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            transition: all .3s ease;
            display: block;
        }
        .related-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-md);
        }
        .related-card img {
            width: 100%;
            height: 170px;
            object-fit: cover;
            transition: transform .5s ease;
        }
        .related-card:hover img {
            transform: scale(1.04);
        }
        .related-body {
            padding: 20px 20px 24px;
        }
        .related-body h3 {
            font-size: 17px;
            font-weight: 700;
            color: var(--primary);
            line-height: 1.5;
            margin-bottom: 8px;
            transition: color .2s;
        }
        .related-card:hover .related-body h3 {
            color: var(--warm);
        }
        .related-body p {
            font-size: 14px;
            color: var(--muted);
            line-height: 1.6;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        /* ===== CTA ===== */
        .article-cta {
            background: var(--dark);
            padding: 72px 0;
            position: relative;
            overflow: hidden;
        }
        .article-cta::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            opacity: .25;
        }
        .article-cta::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(115deg, rgba(12, 29, 24, .92) 0%, rgba(12, 29, 24, .72) 100%);
        }
        .cta-inner {
            position: relative;
            z-index: 2;
            text-align: center;
            max-width: 720px;
            margin: 0 auto;
        }
        .cta-inner h2 {
            color: #fff;
            font-size: clamp(28px, 5vw, 40px);
            font-weight: 800;
            letter-spacing: -0.01em;
            margin-bottom: 12px;
        }
        .cta-inner p {
            color: rgba(255, 255, 255, .75);
            font-size: 16px;
            margin-bottom: 32px;
        }
        .cta-actions {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 16px;
            flex-wrap: wrap;
        }
        .cta-actions .btn-primary {
            height: 52px;
            padding: 0 36px;
            font-size: 16px;
        }
        .cta-actions .btn-outline-light {
            height: 52px;
            padding: 0 36px;
            font-size: 16px;
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--dark);
            border-top: 1px solid rgba(255, 255, 255, .06);
            padding: 64px 0 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
            gap: 40px;
            padding-bottom: 48px;
        }
        .footer-logo {
            color: #fff;
            font-size: 24px;
            font-weight: 800;
            letter-spacing: -0.01em;
            margin-bottom: 14px;
        }
        .footer-brand p {
            color: rgba(255, 255, 255, .55);
            font-size: 14px;
            line-height: 1.8;
            max-width: 300px;
        }
        .footer-heading {
            color: #fff;
            font-size: 16px;
            font-weight: 700;
            margin-bottom: 18px;
        }
        .footer-links li {
            margin-bottom: 10px;
        }
        .footer-links a {
            color: rgba(255, 255, 255, .55);
            font-size: 14px;
            transition: all .2s;
        }
        .footer-links a:hover {
            color: var(--accent);
            padding-left: 4px;
        }
        .footer-contact {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .footer-contact span {
            color: rgba(255, 255, 255, .55);
            font-size: 14px;
            display: inline-flex;
            align-items: center;
            gap: 10px;
        }
        .footer-contact i {
            color: var(--accent);
            width: 18px;
            text-align: center;
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .08);
            padding: 20px 0;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 12px;
            flex-wrap: wrap;
            color: rgba(255, 255, 255, .4);
            font-size: 13px;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .related-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }
        @media (max-width: 768px) {
            .header-inner {
                height: 60px;
            }
            .main-nav {
                display: none;
            }
            .header-actions .btn-header {
                display: none;
            }
            .nav-toggle {
                display: flex;
            }
            .article-section {
                padding: 28px 0 40px;
            }
            .article-card {
                padding: 24px 18px 36px;
                border-radius: 20px;
            }
            .article-title {
                font-size: 24px;
            }
            .article-meta {
                gap: 14px;
            }
            .related-grid {
                grid-template-columns: 1fr;
            }
            .cta-inner h2 {
                font-size: 26px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 32px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .breadcrumb .current {
                max-width: 180px;
            }
        }
        @media (max-width: 520px) {
            .container {
                padding: 0 16px;
            }
            .article-content {
                font-size: 16px;
                line-height: 1.85;
            }
            .article-content h2 {
                font-size: 20px;
            }
            .article-content h3 {
                font-size: 18px;
            }
            .related-card img {
                height: 140px;
            }
            .cta-actions {
                flex-direction: column;
            }
            .cta-actions .btn-primary,
            .cta-actions .btn-outline-light {
                width: 100%;
            }
        }