/* roulang page: index */
:root {
  --primary: #0A5C6A;
  --primary-deep: #063E48;
  --primary-soft: #E3F0F2;
  --accent: #FF6B3D;
  --accent-hover: #E85426;
  --aqua: #19B8A6;
  --bg: #F6F8F8;
  --bg-card: #FFFFFF;
  --bg-deep: #062E35;
  --text-primary: #122B2E;
  --text-secondary: #456468;
  --text-muted: #7A999D;
  --border: #DCE6E7;
  --radius-card: 16px;
  --radius-btn: 999px;
  --radius-tag: 6px;
  --shadow-card: 0 4px 20px rgba(6, 62, 72, 0.06);
  --shadow-hover: 0 12px 32px rgba(6, 62, 72, 0.12);
  --shadow-cta: 0 4px 16px rgba(255, 107, 61, 0.35);
  --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
  --container-width: 1440px;
  --spacing-section: 96px;
  --spacing-mobile: 64px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-family);
  background: var(--bg);
  color: var(--text-primary);
  line-height: 1.7;
  font-size: 1rem;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, select, textarea { font-family: inherit; font-size: 1rem; }
.container {
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 48px;
}
.section { padding: var(--spacing-section) 0; }
.section-label {
  display: inline-flex;
  align-items: center;
  background: var(--primary-soft);
  color: var(--primary-deep);
  font-size: 0.8125rem;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: var(--radius-btn);
  letter-spacing: 0.04em;
  margin-bottom: 16px;
}
.section-title {
  font-size: 1.875rem;
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-primary);
  margin-bottom: 12px;
}
.section-sub {
  font-size: 1rem;
  color: var(--text-secondary);
  max-width: 680px;
  line-height: 1.7;
}
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-size: 1.0625rem;
  font-weight: 600;
  padding: 14px 36px;
  border-radius: var(--radius-btn);
  transition: all 0.3s ease;
  line-height: 1.4;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: var(--shadow-cta);
}
.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255, 107, 61, 0.45);
}
.btn-primary:active { transform: translateY(0); }
.btn-outline {
  background: transparent;
  border: 1.5px solid var(--primary);
  color: var(--primary-deep);
}
.btn-outline:hover { background: var(--primary-soft); }
.btn-white {
  background: #fff;
  color: var(--primary-deep);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.12);
}
.btn-white:hover { background: var(--primary-soft); transform: translateY(-2px); }
.btn-lg { padding: 16px 44px; font-size: 1.125rem; }
.btn-sm { padding: 8px 20px; font-size: 0.875rem; }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(220, 230, 231, 0.6);
  transition: box-shadow 0.3s ease;
}
.site-header.scrolled { box-shadow: 0 4px 24px rgba(6, 62, 72, 0.08); }
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
  gap: 24px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-icon {
  width: 42px;
  height: 42px;
  background: var(--primary);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 20px;
  position: relative;
  overflow: hidden;
}
.logo-icon::after {
  content: "";
  position: absolute;
  width: 18px;
  height: 10px;
  border: 2px solid var(--accent);
  border-radius: 50%;
  transform: rotate(-15deg);
  opacity: 0.8;
}
.logo-text {
  font-size: 1.375rem;
  font-weight: 700;
  color: var(--primary-deep);
  letter-spacing: 0.02em;
  white-space: nowrap;
}
.logo-text span { color: var(--accent); }
.main-nav {
  display: flex;
  align-items: center;
  gap: 28px;
  margin-left: 24px;
}
.main-nav a {
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text-secondary);
  padding: 8px 4px;
  position: relative;
  transition: color 0.3s ease;
  white-space: nowrap;
}
.main-nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 0;
  width: 100%;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
  transform: scaleX(0);
  transition: transform 0.3s ease;
}
.main-nav a:hover { color: var(--primary); }
.main-nav a:hover::after { transform: scaleX(1); }
.main-nav a.active { color: var(--primary); font-weight: 600; }
.main-nav a.active::after { transform: scaleX(1); }
.header-cta {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-left: auto;
}
.header-cta .btn-nav { height: 44px; padding: 0 28px; font-size: 0.9375rem; }
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  z-index: 110;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  border-radius: 2px;
  transition: all 0.3s 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); }

/* Hero */
.hero {
  position: relative;
  background: var(--bg);
  padding: 80px 0 100px;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(ellipse at 20% 80%, rgba(25, 184, 166, 0.08) 0%, transparent 60%), radial-gradient(ellipse at 80% 20%, rgba(10, 92, 106, 0.06) 0%, transparent 50%);
  pointer-events: none;
}
.hero-inner {
  position: relative;
  display: flex;
  align-items: center;
  gap: 64px;
}
.hero-content { flex: 1; max-width: 560px; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  background: var(--primary-soft);
  color: var(--primary-deep);
  font-size: 0.8125rem;
  font-weight: 600;
  padding: 8px 18px;
  border-radius: var(--radius-btn);
  margin-bottom: 24px;
  letter-spacing: 0.04em;
}
.hero-title {
  font-size: 3.25rem;
  font-weight: 700;
  line-height: 1.2;
  color: var(--text-primary);
  margin-bottom: 20px;
}
.hero-title .highlight { color: var(--primary); }
.hero-sub {
  font-size: 1.125rem;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-bottom: 16px;
}
.hero-question {
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 28px;
  padding-left: 16px;
  border-left: 4px solid var(--accent);
}
.hero-ctas { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 28px; }
.hero-trust {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8125rem;
  color: var(--text-muted);
}
.hero-trust svg { width: 16px; height: 16px; color: var(--aqua); }
.hero-visual {
  flex: 1;
  position: relative;
}
.hero-img {
  width: 100%;
  height: 520px;
  object-fit: cover;
  border-radius: 20px;
  box-shadow: 0 20px 60px rgba(6, 62, 72, 0.15);
}
.hero-float-card {
  position: absolute;
  bottom: 24px;
  right: 24px;
  background: #fff;
  border-radius: 12px;
  padding: 16px 20px;
  box-shadow: 0 8px 32px rgba(6, 62, 72, 0.18);
  display: flex;
  align-items: center;
  gap: 14px;
  animation: float 3s ease-in-out infinite;
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}
.hero-float-num {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
}
.hero-float-label {
  font-size: 0.8125rem;
  color: var(--text-secondary);
  line-height: 1.4;
}
.hero-wave {
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  line-height: 0;
}
.hero-wave svg { width: 100%; height: 60px; }

/* Solutions */
.solutions { background: var(--bg-card); }
.solutions-header { margin-bottom: 40px; }
.solutions-grid {
  display: flex;
  gap: 24px;
  align-items: stretch;
}
.solution-card-left {
  flex: 1.15;
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.solution-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 32px;
  box-shadow: var(--shadow-card);
  transition: all 0.3s ease;
  display: flex;
  flex-direction: column;
}
.solution-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
  border-color: var(--primary);
}
.solution-icon {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--primary-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: var(--primary);
  margin-bottom: 20px;
}
.solution-card h3 { font-size: 1.375rem; font-weight: 600; margin-bottom: 10px; color: var(--text-primary); }
.solution-card p { color: var(--text-secondary); font-size: 0.9375rem; line-height: 1.7; margin-bottom: 16px; }
.solution-list { margin-bottom: 20px; }
.solution-list li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  color: var(--text-secondary);
  padding: 4px 0;
}
.solution-list li::before {
  content: "✓";
  color: var(--aqua);
  font-weight: 700;
  font-size: 0.9375rem;
}
.solution-link {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--primary);
  transition: color 0.3s ease;
  margin-top: auto;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.solution-link:hover { color: var(--accent); }
.solution-link:hover svg { transform: translateX(4px); }
.solution-link svg { transition: transform 0.3s ease; width: 16px; height: 16px; }
.solution-side {
  flex: 0.85;
  background: var(--primary-deep);
  border-radius: var(--radius-card);
  padding: 40px 32px;
  display: flex;
  flex-direction: column;
  color: #fff;
  position: relative;
  overflow: hidden;
}
.solution-side::before {
  content: "";
  position: absolute;
  top: -40px;
  right: -40px;
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background: rgba(255, 107, 61, 0.2);
}
.solution-side h3 {
  font-size: 1.375rem;
  font-weight: 600;
  margin-bottom: 16px;
  color: #fff;
}
.solution-side ul { margin-bottom: 28px; flex: 1; }
.solution-side ul li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 8px 0;
  color: rgba(255, 255, 255, 0.88);
  font-size: 0.9375rem;
  line-height: 1.6;
}
.solution-side ul li::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
  margin-top: 8px;
}
.solution-side .btn { align-self: flex-start; }

/* Stats */
.stats {
  background: var(--bg-deep);
  position: relative;
  overflow: hidden;
}
.stats::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(ellipse at 80% 20%, rgba(25, 184, 166, 0.1) 0%, transparent 60%);
}
.stats .section-title { color: #fff; }
.stats .section-label { background: rgba(255, 255, 255, 0.12); color: var(--aqua); }
.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
  margin-top: 48px;
  position: relative;
}
.stat-item {
  text-align: left;
  padding: 24px 0;
  position: relative;
}
.stat-wave {
  width: 24px;
  height: 8px;
  background: var(--accent);
  border-radius: 4px;
  margin-bottom: 16px;
  position: relative;
  overflow: hidden;
}
.stat-wave::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 24px;
  height: 4px;
  border-radius: 50%;
  background: var(--aqua);
  transform: rotate(-2deg);
}
.stat-num {
  font-size: 2.75rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1.2;
  margin-bottom: 4px;
}
.stat-label {
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.9375rem;
}

/* Features */
.features { background: var(--bg); }
.features-header { text-align: center; margin-bottom: 48px; }
.features-header .section-sub { margin: 0 auto; }
.features-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}
.feature-img-wrap {
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-hover);
  position: relative;
}
.feature-img-wrap img { width: 100%; height: 380px; object-fit: cover; transition: transform 0.5s ease; }
.feature-img-wrap:hover img { transform: scale(1.03); }
.feature-img-tag {
  position: absolute;
  top: 16px;
  left: 16px;
  background: rgba(255, 255, 255, 0.92);
  padding: 6px 14px;
  border-radius: var(--radius-btn);
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--primary-deep);
}
.feature-content h3 {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 14px;
  color: var(--text-primary);
}
.feature-content p {
  color: var(--text-secondary);
  font-size: 0.9375rem;
  line-height: 1.8;
  margin-bottom: 16px;
}
.feature-points { margin-top: 12px; }
.feature-points li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 6px 0;
  font-size: 0.9375rem;
  color: var(--text-secondary);
}
.feature-points li::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--aqua);
  flex-shrink: 0;
  margin-top: 8px;
}

/* News */
.news { background: var(--bg-card); }
.news-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 40px;
  flex-wrap: wrap;
  gap: 16px;
}
.news-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.news-item {
  display: flex;
  gap: 24px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 20px;
  transition: box-shadow 0.3s ease, transform 0.3s ease;
  align-items: center;
}
.news-item:hover {
  box-shadow: var(--shadow-hover);
  transform: translateX(4px);
}
.news-thumb {
  width: 120px;
  height: 80px;
  border-radius: 10px;
  overflow: hidden;
  flex-shrink: 0;
  background: var(--primary-soft);
}
.news-thumb img { width: 100%; height: 100%; object-fit: cover; }
.news-info { flex: 1; min-width: 0; }
.news-tag-row { display: flex; align-items: center; gap: 8px; margin-bottom: 6px; }
.news-tag {
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 0.8125rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: var(--radius-tag);
}
.news-item h4 { font-size: 1.0625rem; font-weight: 600; margin-bottom: 4px; line-height: 1.5; }
.news-item h4 a { color: var(--text-primary); transition: color 0.3s ease; }
.news-item h4 a:hover { color: var(--primary); }
.news-summary {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.6;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  margin-bottom: 6px;
}
.news-meta {
  display: flex;
  gap: 16px;
  font-size: 0.8125rem;
  color: var(--text-muted);
}
.news-meta span { display: flex; align-items: center; gap: 4px; }
.empty-state {
  background: rgba(227, 240, 242, 0.6);
  border-radius: var(--radius-card);
  padding: 40px;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9375rem;
}

/* FAQ */
.faq { background: var(--bg); }
.faq-layout {
  display: flex;
  gap: 48px;
  align-items: flex-start;
}
.faq-left { flex: 0.8; position: sticky; top: 100px; }
.faq-right { flex: 1.2; }
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  margin-bottom: 12px;
  overflow: hidden;
  transition: box-shadow 0.3s ease;
}
.faq-item.open { box-shadow: var(--shadow-card); }
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px;
  cursor: pointer;
  font-size: 1rem;
  font-weight: 600;
  color: var(--text-primary);
  position: relative;
  padding-left: 26px;
  transition: background 0.3s ease;
}
.faq-question::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 6px;
  background: var(--primary);
  border-radius: 0 6px 6px 0;
}
.faq-question:hover { background: var(--primary-soft); }
.faq-icon {
  width: 20px;
  height: 20px;
  position: relative;
  flex-shrink: 0;
}
.faq-icon::before, .faq-icon::after {
  content: "";
  position: absolute;
  background: var(--primary);
  border-radius: 2px;
  transition: all 0.3s ease;
}
.faq-icon::before { width: 16px; height: 2px; top: 9px; left: 2px; }
.faq-icon::after { width: 2px; height: 16px; top: 2px; left: 9px; }
.faq-item.open .faq-icon::after { transform: scaleY(0); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
}
.faq-answer-inner {
  padding: 0 20px 18px 26px;
  color: var(--text-secondary);
  font-size: 0.9375rem;
  line-height: 1.8;
}

/* CTA */
.cta {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-deep) 100%);
  position: relative;
  overflow: hidden;
}
.cta::before {
  content: "";
  position: absolute;
  top: -60px;
  right: -60px;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: rgba(25, 184, 166, 0.15);
}
.cta::after {
  content: "";
  position: absolute;
  bottom: -80px;
  left: 20%;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: rgba(255, 107, 61, 0.12);
}
.cta-inner {
  display: flex;
  gap: 64px;
  align-items: center;
  position: relative;
  z-index: 1;
}
.cta-left { flex: 1; }
.cta-left h2 { color: #fff; font-size: 2.25rem; font-weight: 700; line-height: 1.3; margin-bottom: 16px; }
.cta-left p { color: rgba(255, 255, 255, 0.85); font-size: 1.0625rem; line-height: 1.8; }
.cta-form-wrap {
  flex: 0.85;
  background: #fff;
  border-radius: var(--radius-card);
  padding: 36px;
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.2);
}
.cta-form .form-group { margin-bottom: 16px; }
.cta-form label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--text-primary);
  margin-bottom: 6px;
}
.cta-form input, .cta-form select {
  width: 100%;
  height: 48px;
  border: 1.5px solid var(--border);
  border-radius: 10px;
  padding: 0 16px;
  font-size: 0.9375rem;
  background: var(--bg);
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
  color: var(--text-primary);
}
.cta-form input:focus, .cta-form select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(10, 92, 106, 0.12);
  background: #fff;
}
.cta-form input::placeholder { color: var(--text-muted); }
.cta-form .btn { width: 100%; margin-top: 8px; }
.cta-privacy {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-top: 14px;
  line-height: 1.5;
}
.cta-privacy svg { width: 14px; height: 14px; flex-shrink: 0; color: var(--aqua); }

/* Footer */
.site-footer {
  background: var(--primary-deep);
  color: rgba(255, 255, 255, 0.8);
  padding: 64px 0 0;
}
.footer-grid {
  display: flex;
  gap: 48px;
  justify-content: space-between;
  padding-bottom: 48px;
  flex-wrap: wrap;
}
.footer-brand { flex: 1.4; min-width: 260px; }
.footer-brand .logo-text { color: #fff; }
.footer-brand .logo-text span { color: var(--accent); }
.footer-desc { font-size: 0.875rem; line-height: 1.7; margin: 16px 0; color: rgba(255, 255, 255, 0.7); }
.footer-socials { display: flex; gap: 12px; }
.footer-socials a {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 0.875rem;
  transition: all 0.3s ease;
}
.footer-socials a:hover {
  background: var(--accent);
  transform: translateY(-3px);
}
.footer-col { flex: 0.8; min-width: 160px; }
.footer-col h4 {
  font-size: 1rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 20px;
}
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul a {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.7);
  transition: color 0.3s ease, padding-left 0.3s ease;
}
.footer-col ul a:hover { color: var(--accent); padding-left: 4px; }
.footer-contact li { display: flex; align-items: center; gap: 8px; font-size: 0.875rem; color: rgba(255, 255, 255, 0.7); padding: 4px 0; }
.footer-contact svg { width: 16px; height: 16px; color: var(--aqua); flex-shrink: 0; }
.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 20px 0;
  text-align: center;
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.5);
}
.footer-bottom a { color: rgba(255, 255, 255, 0.6); }
.footer-bottom a:hover { color: var(--accent); }

/* Focus states */
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, .faq-question:focus-visible {
  outline: 3px solid rgba(255, 107, 61, 0.5);
  outline-offset: 2px;
}

/* Responsive */
@media (max-width: 1280px) {
  .container { padding: 0 32px; }
  .hero-title { font-size: 2.5rem; }
  .hero-img { height: 440px; }
  .solutions-grid { gap: 20px; }
  .solution-card { padding: 24px; }
  .solution-side { padding: 32px 24px; }
}
@media (max-width: 1024px) {
  .container { padding: 0 24px; }
  .hero-inner { flex-direction: column; gap: 40px; }
  .hero-content { max-width: 100%; }
  .hero-img { height: 380px; }
  .hero { padding: 60px 0 80px; }
  .solutions-grid { flex-direction: column; }
  .solution-card-left { flex: auto; }
  .solution-side { flex: auto; }
  .features-grid { grid-template-columns: 1fr; gap: 32px; }
  .faq-layout { flex-direction: column; }
  .faq-left { position: static; }
  .cta-inner { flex-direction: column; gap: 40px; }
  .cta-form-wrap { width: 100%; max-width: 560px; }
  .stats-grid { gap: 24px; }
}
@media (max-width: 767px) {
  .container { padding: 0 16px; }
  .section { padding: var(--spacing-mobile) 0; }
  .header-inner { height: 64px; }
  .main-nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 320px;
    height: 100vh;
    background: #fff;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    padding: 80px 32px 32px;
    transition: right 0.4s ease;
    box-shadow: -8px 0 32px rgba(0, 0, 0, 0.1);
    z-index: 100;
    margin-left: 0;
  }
  .main-nav.open { right: 0; }
  .main-nav a {
    font-size: 1.25rem;
    padding: 12px 0;
    width: 100%;
    border-bottom: 1px solid var(--border);
  }
  .main-nav a::after { display: none; }
  .header-cta { margin-left: 0; }
  .header-cta .btn-nav { display: none; }
  .nav-toggle { display: flex; }
  .hero { padding: 48px 0 64px; }
  .hero-title { font-size: 2.25rem; }
  .hero-img { height: 280px; }
  .hero-float-card { bottom: 16px; right: 16px; padding: 12px 16px; }
  .hero-float-num { font-size: 1.375rem; }
  .hero-ctas { flex-direction: column; }
  .hero-ctas .btn { width: 100%; }
  .stats-grid { grid-template-columns: 1fr 1fr; gap: 20px; }
  .stat-num { font-size: 2rem; }
  .news-item { flex-direction: column; gap: 12px; align-items: flex-start; }
  .news-thumb { width: 100%; height: 160px; }
  .news-summary { white-space: normal; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }
  .news-header { flex-direction: column; align-items: flex-start; }
  .cta-form-wrap { padding: 24px; }
  .footer-grid { flex-direction: column; gap: 32px; }
  .section-title { font-size: 1.5rem; }
  .cta-left h2 { font-size: 1.75rem; }
}
@media (max-width: 520px) {
  .hero-title { font-size: 2rem; }
  .hero-img { height: 220px; }
  .stats-grid { grid-template-columns: 1fr 1fr; }
  .stat-num { font-size: 1.75rem; }
  .solution-card { padding: 20px; }
  .solution-side { padding: 24px 20px; }
}

/* roulang page: article */
:root {
  --primary: #0A5C6A;
  --primary-deep: #063E48;
  --primary-soft: #E3F0F2;
  --accent: #FF6B3D;
  --accent-hover: #E85426;
  --aqua: #19B8A6;
  --bg: #F6F8F8;
  --bg-card: #FFFFFF;
  --bg-deep: #062E35;
  --text-primary: #122B2E;
  --text-secondary: #456468;
  --text-muted: #7A999D;
  --border: #DCE6E7;
  --radius-card: 16px;
  --radius-btn: 999px;
  --radius-tag: 6px;
  --shadow-card: 0 4px 20px rgba(6,62,72,0.06);
  --shadow-card-hover: 0 12px 32px rgba(6,62,72,0.12);
  --shadow-cta: 0 4px 16px rgba(255,107,61,0.35);
  --container: 1440px;
  --space-section: 96px;
  --space-section-mobile: 64px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
  font-size: 1rem;
  line-height: 1.8;
  color: var(--text-primary);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.25s ease, background 0.25s ease, border-color 0.25s ease, box-shadow 0.25s ease, transform 0.25s ease;
}

button, input, select, textarea {
  font-family: inherit;
  font-size: inherit;
  line-height: inherit;
  color: inherit;
}

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding-left: 48px;
  padding-right: 48px;
}

/* ========== Header / Nav ========== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(246, 248, 248, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid rgba(220, 230, 231, 0.7);
  transition: background 0.3s ease, box-shadow 0.3s ease;
}

.site-header.scrolled {
  background: rgba(255, 255, 255, 0.97);
  box-shadow: 0 4px 24px rgba(6, 62, 72, 0.08);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 32px;
}

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

.logo-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--primary-soft);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}

.logo-text {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--primary-deep);
  letter-spacing: -0.01em;
  white-space: nowrap;
}

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

.main-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
  max-width: 640px;
}

.main-nav a {
  padding: 8px 16px;
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-tag);
  border-bottom: 2px solid transparent;
  transition: color 0.25s ease, background 0.25s ease, border-color 0.25s ease;
  white-space: nowrap;
}

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

.main-nav a.active {
  color: var(--primary);
  font-weight: 600;
  border-bottom: 2px wavy var(--accent);
  background: var(--primary-soft);
}

.header-cta {
  flex-shrink: 0;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  font-size: 1rem;
  font-weight: 600;
  border-radius: var(--radius-btn);
  cursor: pointer;
  border: none;
  transition: all 0.25s ease;
  line-height: 1.4;
  text-align: center;
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: var(--shadow-cta);
}

.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(255, 107, 61, 0.45);
}

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

.btn-outline {
  background: transparent;
  color: var(--primary-deep);
  border: 1.5px solid var(--primary);
  box-shadow: none;
}

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

.btn-nav {
  min-height: 44px;
  font-size: 0.95rem;
  padding: 10px 24px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 8px;
  flex-shrink: 0;
}

.nav-toggle span {
  display: block;
  height: 2px;
  width: 24px;
  background: var(--primary-deep);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s 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);
}

/* ========== Breadcrumb ========== */
.breadcrumb-wrap {
  padding: 32px 0 8px;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.breadcrumb a {
  color: var(--primary);
  position: relative;
}

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

.breadcrumb .sep {
  color: var(--border);
  font-weight: 300;
}

.breadcrumb .current {
  color: var(--text-muted);
  max-width: 260px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* ========== Article Hero ========== */
.article-hero {
  padding: 40px 0 48px;
  position: relative;
}

.article-hero .container {
  max-width: 860px;
}

.article-title {
  font-size: 2.5rem;
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-primary);
  margin-bottom: 20px;
  letter-spacing: -0.01em;
}

.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 16px;
  color: var(--text-muted);
  font-size: 0.875rem;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}

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

.article-meta .meta-dot {
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--aqua);
}

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

.article-body {
  max-width: 760px;
  margin: 0 auto;
  padding: 40px 0 8px;
}

.article-body p {
  margin-bottom: 1.2em;
  color: var(--text-secondary);
  line-height: 1.8;
  font-size: 1rem;
}

.article-body h2 {
  font-size: 1.75rem;
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-primary);
  margin: 1.8em 0 0.6em;
}

.article-body h3 {
  font-size: 1.25rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text-primary);
  margin: 1.4em 0 0.5em;
}

.article-body h4 {
  font-size: 1.0625rem;
  font-weight: 600;
  color: var(--text-primary);
  margin: 1.2em 0 0.4em;
}

.article-body ul, .article-body ol {
  margin: 1em 0 1.2em;
  padding-left: 1.5em;
}

.article-body ul li {
  list-style: none;
  position: relative;
  padding-left: 14px;
  margin-bottom: 8px;
  color: var(--text-secondary);
}

.article-body ul li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.7em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary);
}

.article-body ol li {
  margin-bottom: 8px;
  color: var(--text-secondary);
}

.article-body blockquote {
  margin: 1.5em 0;
  padding: 16px 20px;
  border-left: 4px solid var(--accent);
  background: var(--primary-soft);
  border-radius: 0 8px 8px 0;
  color: var(--text-secondary);
  font-style: normal;
}

.article-body blockquote p {
  margin-bottom: 0;
  color: var(--text-secondary);
}

.article-body img {
  border-radius: var(--radius-card);
  margin: 1.5em 0;
  box-shadow: var(--shadow-card);
}

.article-body figure {
  margin: 1.5em 0;
}

.article-body figcaption {
  font-size: 0.8125rem;
  color: var(--text-muted);
  text-align: center;
  margin-top: 8px;
}

.article-body a {
  color: var(--primary);
  border-bottom: 1px solid rgba(10, 92, 106, 0.3);
}

.article-body a:hover {
  color: var(--accent);
  border-color: var(--accent);
}

.article-body strong {
  color: var(--text-primary);
  font-weight: 600;
}

/* ========== Article Tags ========== */
.article-tags {
  max-width: 760px;
  margin: 0 auto;
  padding: 16px 0 32px;
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.tag {
  display: inline-block;
  padding: 6px 14px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-tag);
  font-size: 0.8125rem;
  color: var(--text-secondary);
  transition: all 0.25s ease;
}

.tag:hover {
  border-color: var(--primary);
  color: var(--primary);
  box-shadow: 0 2px 8px rgba(10, 92, 106, 0.1);
}

/* ========== Inline CTA ========== */
.inline-cta {
  max-width: 760px;
  margin: 0 auto 48px;
  background: linear-gradient(135deg, var(--primary), var(--primary-deep));
  border-radius: var(--radius-card);
  padding: 32px 36px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  color: #fff;
  box-shadow: var(--shadow-card);
}

.inline-cta h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin: 0 0 6px;
  color: #fff;
}

.inline-cta p {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.8);
  margin: 0 0 4px;
  line-height: 1.6;
}

.inline-cta .btn-primary {
  white-space: nowrap;
  background: var(--accent);
  box-shadow: none;
}

.inline-cta .btn-primary:hover {
  background: #fff;
  color: var(--primary-deep);
}

/* ========== Related Posts ========== */
.related-section {
  padding: 48px 0 64px;
  border-top: 1px solid var(--border);
}

.related-section .container {
  max-width: 860px;
}

.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 32px;
}

.section-head .overline {
  display: block;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--aqua);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-bottom: 6px;
  padding-left: 12px;
  border-left: 3px solid var(--accent);
}

.section-head h2 {
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.3;
  margin: 0;
}

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

.related-card {
  display: flex;
  align-items: center;
  gap: 16px;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 16px;
  transition: all 0.3s ease;
}

.related-card:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-3px);
}

.related-card .thumb {
  width: 80px;
  height: 60px;
  border-radius: 8px;
  overflow: hidden;
  flex-shrink: 0;
  background: var(--primary-soft);
  position: relative;
}

.related-card .thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.related-card .thumb .badge-new {
  position: absolute;
  top: 4px;
  right: 4px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

.related-card .info {
  min-width: 0;
}

.related-card .info h4 {
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.5;
  color: var(--text-primary);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  margin-bottom: 6px;
  transition: color 0.25s ease;
}

.related-card:hover .info h4 {
  color: var(--primary);
}

.related-card .info time {
  font-size: 0.75rem;
  color: var(--text-muted);
}

.related-card .info small {
  display: inline-block;
  font-size: 0.75rem;
  color: var(--aqua);
  background: var(--primary-soft);
  border-radius: 4px;
  padding: 2px 6px;
  margin-left: 6px;
}

/* ========== Back Link ========== */
.back-link {
  max-width: 760px;
  margin: 0 auto 64px;
  text-align: center;
}

.back-link a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--primary);
  transition: color 0.25s ease, transform 0.25s ease;
}

.back-link a:hover {
  color: var(--accent);
  transform: translateX(-4px);
}

/* ========== Not Found ========== */
.not-found {
  max-width: 760px;
  margin: 80px auto;
  padding: 64px 40px;
  background: var(--bg-card);
  border-radius: var(--radius-card);
  border: 1px solid var(--border);
  text-align: center;
}

.not-found .nf-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: var(--primary-soft);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  font-size: 28px;
}

.not-found h2 {
  font-size: 1.5rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 12px;
}

.not-found p {
  color: var(--text-secondary);
  margin-bottom: 24px;
}

/* ========== Footer ========== */
.site-footer {
  background: var(--primary-deep);
  color: rgba(255, 255, 255, 0.8);
  padding-top: 64px;
  padding-bottom: 0;
  position: relative;
  overflow: hidden;
}

.site-footer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--accent), var(--aqua), transparent);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 48px;
}

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

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

.footer-desc {
  font-size: 0.875rem;
  line-height: 1.7;
  color: rgba(255, 255, 255, 0.7);
  margin: 12px 0 20px;
  max-width: 340px;
}

.footer-socials {
  display: flex;
  gap: 12px;
}

.footer-socials a {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.1);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.75);
  transition: all 0.25s ease;
}

.footer-socials a:hover {
  background: var(--accent);
  color: #fff;
  transform: translateY(-3px);
}

.footer-column h4 {
  font-size: 0.9375rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 16px;
  position: relative;
  padding-bottom: 8px;
}

.footer-column h4::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 0;
  width: 24px;
  height: 2px;
  background: var(--accent);
  border-radius: 2px;
}

.footer-links {
  list-style: none;
}

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

.footer-links a {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.7);
  transition: color 0.25s ease, padding-left 0.25s ease;
}

.footer-links a:hover {
  color: var(--accent);
  padding-left: 4px;
}

.footer-contact {
  list-style: none;
}

.footer-contact li {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.7);
  margin-bottom: 12px;
  display: flex;
  align-items: flex-start;
  gap: 8px;
  line-height: 1.5;
}

.footer-contact li svg {
  flex-shrink: 0;
  margin-top: 4px;
  color: var(--aqua);
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding: 20px 0;
  font-size: 0.8125rem;
  color: rgba(255, 255, 255, 0.5);
  display: flex;
  justify-content: center;
  text-align: center;
}

.footer-bottom p {
  margin: 0 auto;
}

/* ========== Focus States ========== */
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

/* ========== Responsive ========== */
@media (max-width: 1279px) {
  .main-nav {
    max-width: 540px;
  }
}

@media (max-width: 1023px) {
  .header-inner {
    height: 68px;
  }

  .main-nav {
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 20px 24px 28px;
    box-shadow: 0 16px 40px rgba(6, 62, 72, 0.12);
    max-width: none;
    transform: translateY(-150%);
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s ease;
    border-bottom: 2px solid var(--primary-soft);
    z-index: 99;
  }

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

  .main-nav a {
    padding: 14px 16px;
    font-size: 1.125rem;
    border-radius: var(--radius-tag);
    border-bottom: none;
  }

  .main-nav a.active {
    border-bottom: none;
    border-left: 3px solid var(--accent);
  }

  .header-cta {
    display: none;
  }

  .header-cta.open {
    display: block;
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    padding: 0 24px 16px;
    background: #fff;
    z-index: 100;
    box-shadow: 0 16px 40px rgba(6, 62, 72, 0.12);
  }

  .header-cta.open .btn {
    width: 100%;
  }

  .nav-toggle {
    display: flex;
  }

  .article-title {
    font-size: 2rem;
  }

  .related-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .inline-cta {
    flex-direction: column;
    align-items: flex-start;
    padding: 24px;
  }

  .inline-cta .btn-primary {
    width: auto;
  }

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

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

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

  .header-inner {
    height: 64px;
  }

  .main-nav {
    top: 64px;
  }

  .header-cta.open {
    top: 64px;
  }

  .logo-text {
    font-size: 1.125rem;
  }

  .logo-icon {
    width: 32px;
    height: 32px;
    font-size: 16px;
  }

  .breadcrumb-wrap {
    padding: 24px 0 4px;
  }

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

  .article-title {
    font-size: 1.625rem;
  }

  .article-meta {
    gap: 8px 12px;
    font-size: 0.8125rem;
  }

  .article-body {
    padding: 24px 0 4px;
  }

  .article-body h2 {
    font-size: 1.375rem;
  }

  .article-body h3 {
    font-size: 1.125rem;
  }

  .article-body p {
    font-size: 0.9375rem;
  }

  .inline-cta {
    padding: 20px;
    margin-bottom: 32px;
  }

  .inline-cta h3 {
    font-size: 1.125rem;
  }

  .inline-cta .btn-primary {
    width: 100%;
    justify-content: center;
  }

  .related-section {
    padding: 32px 0 48px;
  }

  .section-head h2 {
    font-size: 1.375rem;
  }

  .back-link {
    margin-bottom: 48px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
    padding-top: 8px;
  }

  .footer-brand {
    grid-column: auto;
  }

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

  .footer-bottom {
    flex-direction: column;
    gap: 8px;
    padding: 16px;
    text-align: center;
  }

  .not-found {
    margin: 40px 16px;
    padding: 40px 20px;
  }

  .not-found h2 {
    font-size: 1.25rem;
  }
}

@media (max-width: 520px) {
  .header-cta .btn-nav {
    padding: 10px 16px;
    font-size: 0.875rem;
  }

  .article-meta .meta-item {
    flex-wrap: wrap;
  }

  .breadcrumb .current {
    max-width: 180px;
  }

  .related-card {
    padding: 12px;
  }

  .related-card .thumb {
    width: 72px;
    height: 54px;
  }
}

/* High-DPI screens */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  .site-header {
    animation: none;
  }
}

/* roulang page: category1 */
/* ===== 设计变量 ===== */
    :root {
      --primary: #0A5C6A;
      --primary-deep: #063E48;
      --primary-soft: #E3F0F2;
      --accent: #FF6B3D;
      --accent-hover: #E85426;
      --aqua: #19B8A6;
      --bg: #F6F8F8;
      --bg-card: #FFFFFF;
      --bg-deep: #062E35;
      --text-primary: #122B2E;
      --text-secondary: #456468;
      --text-muted: #7A999D;
      --border: #DCE6E7;
      --shadow-sm: 0 4px 20px rgba(6, 62, 72, 0.06);
      --shadow-md: 0 12px 32px rgba(6, 62, 72, 0.12);
      --radius-card: 16px;
      --radius-hero: 20px;
      --radius-full: 999px;
      --transition: all 0.3s ease;
    }

    /* ===== Reset & Base ===== */
    *,
    *::before,
    *::after {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
      background: var(--bg);
      color: var(--text-primary);
      line-height: 1.8;
      font-size: 1rem;
      -webkit-font-smoothing: antialiased;
    }

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

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

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

    ul,
    ol {
      list-style: none;
    }

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

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

    /* ===== 容器 ===== */
    .container {
      max-width: 1440px;
      margin: 0 auto;
      padding: 0 48px;
    }

    /* ===== 按钮体系 ===== */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      border-radius: var(--radius-full);
      font-weight: 600;
      font-size: 1.0625rem;
      padding: 14px 36px;
      transition: var(--transition);
      line-height: 1.2;
      white-space: nowrap;
    }

    .btn-primary {
      background: var(--accent);
      color: #fff;
      box-shadow: 0 4px 16px rgba(255, 107, 61, 0.35);
    }

    .btn-primary:hover {
      background: var(--accent-hover);
      color: #fff;
      transform: translateY(-2px);
      box-shadow: 0 8px 24px rgba(255, 107, 61, 0.4);
    }

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

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

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

    .btn-nav {
      height: 44px;
      padding: 0 24px;
      font-size: 0.9375rem;
    }

    .btn-block {
      width: 100%;
    }

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

    .btn-white:hover {
      background: var(--primary-soft);
      color: var(--primary-deep);
    }

    .btn-arrow {
      transition: transform 0.3s ease;
    }

    .btn:hover .btn-arrow {
      transform: translateX(4px);
    }

    /* ===== 标签 ===== */
    .tag {
      display: inline-block;
      padding: 6px 12px;
      background: var(--primary-soft);
      color: var(--primary-deep);
      border-radius: 6px;
      font-size: 0.8125rem;
      font-weight: 600;
      line-height: 1.2;
    }

    .tag-accent {
      background: var(--accent);
      color: #fff;
      border-radius: var(--radius-full);
    }

    .eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      position: relative;
      padding-left: 16px;
      font-size: 0.875rem;
      font-weight: 600;
      color: var(--primary);
      letter-spacing: 0.08em;
    }

    .eyebrow::before {
      content: "";
      position: absolute;
      left: 0;
      top: 50%;
      transform: translateY(-50%);
      width: 6px;
      height: 20px;
      border-radius: 3px;
      background: var(--accent);
    }

    /* ===== Header ===== */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255, 255, 255, 0.95);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 1px solid rgba(220, 230, 231, 0.7);
      transition: box-shadow 0.3s ease, background 0.3s ease;
    }

    .site-header.scrolled {
      box-shadow: 0 8px 30px rgba(6, 62, 72, 0.08);
      background: rgba(255, 255, 255, 0.98);
    }

    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 76px;
      gap: 24px;
    }

    .logo {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      font-size: 1.375rem;
      font-weight: 700;
      color: var(--primary-deep);
      flex-shrink: 0;
    }

    .logo-icon {
      width: 42px;
      height: 42px;
      display: flex;
      align-items: center;
      justify-content: center;
      background: var(--primary-soft);
      border-radius: 12px;
      font-size: 1.25rem;
      line-height: 1;
    }

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

    .main-nav {
      display: flex;
      align-items: center;
      gap: 32px;
    }

    .main-nav a {
      position: relative;
      font-weight: 500;
      color: var(--text-secondary);
      padding: 8px 2px;
      font-size: 0.9375rem;
    }

    .main-nav a:hover {
      color: var(--primary);
    }

    .main-nav a.active {
      color: var(--primary);
      font-weight: 600;
      border-bottom: 2px wavy var(--accent);
    }

    .header-cta {
      flex-shrink: 0;
    }

    .mobile-cta {
      display: none;
    }

    .nav-toggle {
      display: none;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      gap: 5px;
      width: 44px;
      height: 44px;
      border-radius: 10px;
      transition: var(--transition);
      flex-shrink: 0;
    }

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

    .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);
    }

    /* ===== 分类页 Hero ===== */
    .category-hero {
      position: relative;
      padding: 80px 0 96px;
      background: linear-gradient(to bottom, var(--primary-soft) 0%, var(--bg) 100%);
      overflow: hidden;
    }

    .category-hero::before {
      content: "";
      position: absolute;
      inset: 0;
      background-image: url('/assets/images/backpic/back-1.png');
      background-size: cover;
      background-position: center;
      opacity: 0.15;
      z-index: 0;
    }

    .category-hero .container {
      position: relative;
      z-index: 1;
    }

    .category-hero .eyebrow {
      margin-bottom: 20px;
    }

    .category-hero h1 {
      font-size: 2.5rem;
      font-weight: 700;
      line-height: 1.25;
      color: var(--primary-deep);
      margin-bottom: 16px;
      max-width: 720px;
    }

    .category-hero-desc {
      font-size: 1.125rem;
      color: var(--text-secondary);
      max-width: 680px;
      line-height: 1.8;
      margin-bottom: 32px;
    }

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

    /* ===== 内容覆盖模块 ===== */
    .coverage {
      padding: 96px 0;
    }

    .section-head {
      margin-bottom: 48px;
    }

    .section-head h2 {
      font-size: 1.875rem;
      font-weight: 700;
      line-height: 1.3;
      color: var(--text-primary);
      margin-top: 12px;
    }

    .section-head p {
      color: var(--text-secondary);
      margin-top: 12px;
      max-width: 640px;
    }

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

    .coverage-card {
      background: var(--bg-card);
      border-radius: var(--radius-card);
      padding: 32px 28px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      border: 1px solid rgba(220, 230, 231, 0.4);
    }

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

    .coverage-card-img {
      border-radius: 12px;
      overflow: hidden;
      margin-bottom: 24px;
      height: 160px;
    }

    .coverage-card-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    .coverage-card h3 {
      font-size: 1.375rem;
      font-weight: 600;
      line-height: 1.4;
      color: var(--text-primary);
      margin-bottom: 12px;
    }

    .coverage-card p {
      color: var(--text-secondary);
      font-size: 0.9375rem;
      line-height: 1.7;
    }

    /* ===== 分类主体双栏 ===== */
    .category-body {
      padding: 0 0 96px;
    }

    .category-layout {
      display: grid;
      grid-template-columns: 65% calc(35% - 40px);
      gap: 40px;
      align-items: start;
    }

    .category-main .section-head {
      margin-bottom: 32px;
    }

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

    .news-item {
      display: flex;
      gap: 24px;
      background: var(--bg-card);
      border-radius: var(--radius-card);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      border: 1px solid rgba(220, 230, 231, 0.4);
      transition: var(--transition);
    }

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

    .news-date {
      flex-shrink: 0;
      width: 64px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: flex-start;
      padding-top: 4px;
    }

    .date-day {
      font-size: 2rem;
      font-weight: 700;
      color: var(--primary);
      line-height: 1.2;
    }

    .date-month {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.4;
    }

    .news-content {
      flex: 1;
      min-width: 0;
    }

    .news-content .tag {
      margin-bottom: 10px;
    }

    .news-content h3 {
      font-size: 1.25rem;
      font-weight: 600;
      line-height: 1.5;
      color: var(--text-primary);
      margin-bottom: 8px;
    }

    .news-content h3 a {
      color: var(--text-primary);
    }

    .news-content h3 a:hover {
      color: var(--accent);
    }

    .news-content p {
      color: var(--text-secondary);
      font-size: 0.9375rem;
      line-height: 1.7;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
      margin-bottom: 12px;
    }

    .news-content .read-more {
      display: inline-flex;
      align-items: center;
      gap: 4px;
      font-size: 0.9375rem;
      font-weight: 600;
      color: var(--primary);
    }

    .news-content .read-more:hover {
      color: var(--accent);
      gap: 8px;
    }

    /* ===== 侧栏卡片 ===== */
    .category-sidebar {
      position: sticky;
      top: 100px;
    }

    .sidebar-card {
      background: var(--bg-card);
      border-radius: var(--radius-card);
      padding: 32px 28px;
      box-shadow: var(--shadow-sm);
      border: 1px solid rgba(220, 230, 231, 0.4);
    }

    .sidebar-card h3 {
      font-size: 1.25rem;
      font-weight: 600;
      color: var(--text-primary);
      margin-bottom: 24px;
      padding-bottom: 16px;
      border-bottom: 1px solid var(--border);
    }

    .category-list {
      display: flex;
      flex-direction: column;
      gap: 8px;
      margin-bottom: 28px;
    }

    .category-list a {
      display: block;
      padding: 12px 16px;
      border-radius: 10px;
      font-weight: 500;
      color: var(--text-secondary);
      background: transparent;
      transition: var(--transition);
    }

    .category-list a:hover {
      background: var(--primary-soft);
      color: var(--primary-deep);
    }

    .category-list a.active {
      color: var(--primary);
      font-weight: 600;
      background: var(--primary-soft);
      border-left: 3px solid var(--accent);
    }

    .sidebar-tip {
      margin-top: 20px;
      padding: 20px;
      background: var(--primary-soft);
      border-radius: 12px;
    }

    .sidebar-tip p {
      font-size: 0.9375rem;
      color: var(--primary-deep);
      line-height: 1.7;
      margin-bottom: 12px;
    }

    /* ===== FAQ ===== */
    .faq-section {
      padding: 96px 0;
      background: var(--bg-card);
      border-top: 1px solid var(--border);
      border-bottom: 1px solid var(--border);
    }

    .faq-layout {
      display: grid;
      grid-template-columns: 30% calc(70% - 60px);
      gap: 60px;
      align-items: flex-start;
    }

    .faq-title-col {
      position: sticky;
      top: 100px;
    }

    .faq-title-col h2 {
      font-size: 1.875rem;
      font-weight: 700;
      line-height: 1.3;
      color: var(--text-primary);
      margin-top: 12px;
      margin-bottom: 16px;
    }

    .faq-title-col p {
      color: var(--text-secondary);
      line-height: 1.8;
    }

    .faq-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: 12px;
      overflow: hidden;
      transition: var(--transition);
    }

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

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

    .faq-question {
      display: flex;
      align-items: center;
      gap: 12px;
      min-height: 56px;
      padding: 14px 20px;
      cursor: pointer;
      font-weight: 600;
      color: var(--text-primary);
      font-size: 1rem;
      transition: var(--transition);
    }

    .faq-question::before {
      content: "";
      width: 6px;
      height: 20px;
      border-radius: 3px;
      background: var(--primary);
      flex-shrink: 0;
    }

    .faq-question .faq-icon {
      margin-left: auto;
      width: 28px;
      height: 28px;
      border-radius: 50%;
      background: var(--primary-soft);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1rem;
      color: var(--primary);
      flex-shrink: 0;
      transition: var(--transition);
    }

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

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

    .faq-answer-inner {
      padding: 0 20px 20px 56px;
      color: var(--text-secondary);
      font-size: 0.9375rem;
      line-height: 1.8;
    }

    /* ===== CTA 横条 ===== */
    .cta-strip {
      padding: 80px 0;
    }

    .cta-strip-inner {
      background: var(--primary-soft);
      border-radius: 12px;
      padding: 40px 48px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 32px;
      flex-wrap: wrap;
    }

    .cta-strip-inner p {
      font-size: 1.125rem;
      font-weight: 600;
      color: var(--primary-deep);
      max-width: 600px;
    }

    .cta-strip-inner .btn {
      flex-shrink: 0;
    }

    /* ===== Footer ===== */
    .site-footer {
      background: var(--primary-deep);
      color: rgba(255, 255, 255, 0.8);
      padding: 64px 0 0;
    }

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

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

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

    .footer-brand .logo-icon {
      background: rgba(255, 255, 255, 0.15);
      color: #fff;
    }

    .footer-desc {
      font-size: 0.9375rem;
      line-height: 1.8;
      color: rgba(255, 255, 255, 0.7);
      max-width: 360px;
      margin-bottom: 24px;
    }

    .footer-socials {
      display: flex;
      gap: 12px;
    }

    .footer-socials a {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: rgba(255, 255, 255, 0.1);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      color: rgba(255, 255, 255, 0.85);
      transition: var(--transition);
    }

    .footer-socials a:hover {
      background: var(--accent);
      color: #fff;
      transform: translateY(-2px);
    }

    .footer-col h4 {
      font-size: 1rem;
      font-weight: 600;
      color: #fff;
      margin-bottom: 20px;
    }

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

    .footer-col ul a {
      color: rgba(255, 255, 255, 0.7);
      font-size: 0.9375rem;
    }

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

    .footer-contact li {
      font-size: 0.9375rem;
      color: rgba(255, 255, 255, 0.7);
      line-height: 1.7;
    }

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      padding: 24px 0;
      text-align: center;
      font-size: 0.8125rem;
      color: rgba(255, 255, 255, 0.5);
    }

    .footer-bottom a {
      color: rgba(255, 255, 255, 0.6);
    }

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

    /* ===== 响应式 ===== */
    @media (max-width: 1280px) {
      .container {
        padding: 0 32px;
      }
    }

    @media (max-width: 1024px) {
      .category-hero h1 {
        font-size: 2.5rem;
      }

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

      .category-layout {
        grid-template-columns: 1fr;
        gap: 48px;
      }

      .category-sidebar {
        position: static;
      }

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

      .faq-title-col {
        position: static;
      }

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

    @media (max-width: 768px) {
      .container {
        padding: 0 24px;
      }

      .header-inner {
        height: 64px;
      }

      .main-nav {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        flex-direction: column;
        align-items: flex-start;
        justify-content: flex-start;
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(12px);
        padding: 24px;
        gap: 8px;
        box-shadow: 0 24px 40px rgba(6, 62, 72, 0.12);
        transform: translateY(-16px);
        opacity: 0;
        pointer-events: none;
        transition: var(--transition);
        z-index: -1;
        max-height: calc(100vh - 64px);
        overflow-y: auto;
      }

      .main-nav.open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
      }

      .main-nav a {
        display: block;
        padding: 12px 0;
        font-size: 1.25rem;
        line-height: 48px;
        width: 100%;
        border-bottom: 1px solid rgba(220, 230, 231, 0.4);
      }

      .main-nav a.active {
        border-bottom: 2px wavy var(--accent);
      }

      .header-cta {
        display: none;
      }

      .mobile-cta {
        display: inline-flex;
        margin-top: 16px;
        width: 100%;
      }

      .nav-toggle {
        display: flex;
      }

      .category-hero {
        padding: 56px 0 64px;
      }

      .category-hero h1 {
        font-size: 2rem;
      }

      .category-hero-desc {
        font-size: 1rem;
      }

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

      .coverage {
        padding: 64px 0;
      }

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

      .section-head h2 {
        font-size: 1.5rem;
      }

      .news-item {
        flex-direction: column;
        gap: 16px;
        padding: 20px;
      }

      .news-date {
        flex-direction: row;
        align-items: center;
        gap: 8px;
        width: auto;
        padding: 0;
      }

      .date-day {
        font-size: 1.375rem;
      }

      .date-month {
        font-size: 0.8125rem;
      }

      .category-body {
        padding-bottom: 64px;
      }

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

      .cta-strip {
        padding: 48px 0;
      }

      .cta-strip-inner {
        flex-direction: column;
        align-items: flex-start;
        padding: 28px 24px;
      }

      .cta-strip-inner .btn {
        width: 100%;
      }

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

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

      .category-hero h1 {
        font-size: 1.75rem;
      }

      .coverage-card {
        padding: 24px 20px;
      }

      .news-item {
        padding: 18px;
      }

      .sidebar-card {
        padding: 24px 20px;
      }

      .faq-question {
        padding: 12px 14px;
        font-size: 0.9375rem;
      }

      .faq-answer-inner {
        padding: 0 14px 16px 40px;
      }
    }

    @media (max-width: 360px) {
      .logo-text {
        font-size: 1.125rem;
      }

      .logo-icon {
        width: 36px;
        height: 36px;
        font-size: 1rem;
      }
    }

/* roulang page: category2 */
:root {
      --primary: #0A5C6A;
      --primary-deep: #063E48;
      --primary-soft: #E3F0F2;
      --accent: #FF6B3D;
      --accent-hover: #E85426;
      --aqua: #19B8A6;
      --bg: #F6F8F8;
      --bg-card: #FFFFFF;
      --bg-deep: #062E35;
      --text-primary: #122B2E;
      --text-secondary: #456468;
      --text-muted: #7A999D;
      --border: #DCE6E7;
      --radius-card: 16px;
      --radius-tag: 6px;
      --radius-btn: 999px;
      --shadow-card: 0 4px 20px rgba(6,62,72,0.06);
      --shadow-hover: 0 12px 32px rgba(6,62,72,0.12);
      --shadow-cta: 0 4px 16px rgba(255,107,61,0.35);
      --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: var(--font-family);
      background: var(--bg);
      color: var(--text-primary);
      line-height: 1.8;
      font-size: 1rem;
      -webkit-font-smoothing: antialiased;
    }

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

    a {
      color: inherit;
      text-decoration: none;
    }

    ul,
    ol {
      list-style: none;
    }

    button,
    input,
    select,
    textarea {
      font-family: inherit;
      border: none;
      outline: none;
    }

    a:focus-visible,
    button:focus-visible,
    input:focus-visible,
    select:focus-visible,
    summary:focus-visible {
      outline: 2px solid var(--accent);
      outline-offset: 2px;
    }

    .container {
      max-width: 1440px;
      margin: 0 auto;
      padding: 0 48px;
    }

    /* ===== 按钮 ===== */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      border-radius: var(--radius-btn);
      font-weight: 600;
      font-size: 1.0625rem;
      padding: 14px 36px;
      cursor: pointer;
      transition: all 0.25s ease;
      line-height: 1.4;
      white-space: nowrap;
    }
    .btn-primary {
      background: var(--accent);
      color: #fff;
      box-shadow: var(--shadow-cta);
    }
    .btn-primary:hover {
      background: var(--accent-hover);
      transform: translateY(-2px);
      box-shadow: 0 8px 24px rgba(255,107,61,0.4);
    }
    .btn-primary:active {
      transform: translateY(0);
    }
    .btn-outline {
      background: transparent;
      border: 1.5px solid var(--primary);
      color: var(--primary-deep);
    }
    .btn-outline:hover {
      background: var(--primary-soft);
    }
    .btn-light {
      background: #fff;
      color: var(--primary-deep);
      box-shadow: 0 4px 16px rgba(0,0,0,0.12);
    }
    .btn-light:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 24px rgba(0,0,0,0.18);
    }
    .btn-block {
      width: 100%;
    }

    /* ===== Header ===== */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 100;
      background: rgba(255,255,255,0.92);
      backdrop-filter: blur(8px);
      box-shadow: 0 1px 0 rgba(6,62,72,0.06);
      transition: box-shadow 0.3s ease;
    }
    .site-header.scrolled {
      box-shadow: 0 4px 24px rgba(6,62,72,0.08);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 76px;
      gap: 24px;
    }
    .logo {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      flex-shrink: 0;
    }
    .logo-icon {
      width: 38px;
      height: 38px;
      border-radius: 50%;
      background: var(--primary-soft);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      color: var(--primary);
    }
    .logo-text {
      font-size: 1.25rem;
      font-weight: 700;
      color: var(--primary-deep);
      letter-spacing: 0.02em;
    }
    .logo-text span {
      color: var(--accent);
    }
    .main-nav {
      display: flex;
      align-items: center;
      gap: 36px;
    }
    .main-nav a {
      font-size: 1rem;
      font-weight: 500;
      color: var(--text-secondary);
      padding: 8px 4px;
      position: relative;
      transition: color 0.25s;
    }
    .main-nav a:hover {
      color: var(--primary);
    }
    .main-nav a.active {
      color: var(--primary);
      border-bottom: 2px wavy var(--accent);
    }
    .header-cta .btn-nav {
      height: 44px;
      padding: 0 28px;
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .nav-cta-mobile {
      display: none;
    }
    .nav-toggle {
      display: none;
      flex-direction: column;
      justify-content: center;
      align-items: center;
      gap: 5px;
      width: 40px;
      height: 40px;
      background: none;
      cursor: pointer;
      padding: 0;
    }
    .nav-toggle span {
      width: 22px;
      height: 2px;
      background: var(--text-primary);
      transition: all 0.3s;
      display: block;
    }

    /* ===== 页面头部 ===== */
    .page-hero {
      padding: 64px 0 56px;
      position: relative;
      overflow: hidden;
      background: var(--bg);
    }
    .page-hero::before {
      content: "";
      position: absolute;
      inset: 0;
      background: radial-gradient(circle at 85% 20%, rgba(25,184,166,0.08), transparent 40%),
        radial-gradient(circle at 20% 80%, rgba(10,92,106,0.06), transparent 45%);
      pointer-events: none;
    }
    .page-hero-inner {
      display: flex;
      align-items: center;
      gap: 48px;
      position: relative;
      z-index: 1;
    }
    .page-hero-content {
      flex: 1;
    }
    .page-hero-visual {
      flex: 0 0 38%;
      border-radius: 20px;
      overflow: hidden;
      box-shadow: var(--shadow-card);
    }
    .page-hero-visual img {
      width: 100%;
      height: 260px;
      object-fit: cover;
    }
    .page-overline {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: var(--primary-soft);
      color: var(--primary-deep);
      font-size: 0.8125rem;
      font-weight: 600;
      padding: 6px 16px;
      border-radius: 999px;
      margin-bottom: 16px;
      letter-spacing: 0.04em;
    }
    .page-hero h1 {
      font-size: 2.5rem;
      line-height: 1.25;
      color: var(--text-primary);
      margin-bottom: 16px;
      font-weight: 700;
    }
    .page-hero p {
      color: var(--text-secondary);
      max-width: 640px;
      font-size: 1.0625rem;
      line-height: 1.7;
    }

    /* ===== 分类主体区 ===== */
    .category-main {
      padding: 24px 0 72px;
    }
    .category-layout {
      display: flex;
      gap: 48px;
      align-items: flex-start;
    }
    .category-content {
      flex: 0 0 65%;
      max-width: 65%;
    }
    .category-sidebar {
      flex: 0 0 35%;
      max-width: 35%;
    }
    .entry-list {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .entry-card {
      display: flex;
      gap: 20px;
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius-card);
      padding: 20px 24px;
      transition: box-shadow 0.3s, transform 0.3s;
    }
    .entry-card:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-2px);
    }
    .entry-date {
      flex: 0 0 64px;
      text-align: center;
      background: var(--primary-soft);
      border-radius: 12px;
      padding: 12px 8px;
      align-self: flex-start;
    }
    .entry-date .day {
      font-size: 1.5rem;
      font-weight: 700;
      color: var(--primary);
      line-height: 1.2;
    }
    .entry-date .month {
      font-size: 0.8125rem;
      color: var(--text-muted);
      margin-top: 4px;
    }
    .entry-body {
      flex: 1;
    }
    .entry-body h3 {
      font-size: 1.25rem;
      font-weight: 600;
      margin-bottom: 8px;
      color: var(--text-primary);
      transition: color 0.25s;
    }
    .entry-body h3 a:hover {
      color: var(--primary);
    }
    .entry-body p {
      color: var(--text-secondary);
      font-size: 0.9375rem;
      line-height: 1.65;
      display: -webkit-box;
      -webkit-line-clamp: 2;
      -webkit-box-orient: vertical;
      overflow: hidden;
      margin-bottom: 10px;
    }
    .entry-link {
      color: var(--primary);
      font-weight: 500;
      font-size: 0.9375rem;
      display: inline-flex;
      align-items: center;
      gap: 6px;
      transition: color 0.25s;
    }
    .entry-link:hover {
      color: var(--accent);
    }
    .entry-link::after {
      content: "→";
      transition: transform 0.25s;
    }
    .entry-link:hover::after {
      transform: translateX(4px);
    }

    /* ===== 侧栏 ===== */
    .sidebar-card {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius-card);
      padding: 24px;
      margin-bottom: 24px;
    }
    .sidebar-card h3 {
      font-size: 1.125rem;
      font-weight: 600;
      color: var(--text-primary);
      margin-bottom: 16px;
      padding-left: 12px;
      border-left: 3px solid var(--accent);
    }
    .sidebar-cat-list li a {
      display: block;
      padding: 12px 16px;
      border-radius: 8px;
      color: var(--text-secondary);
      font-weight: 500;
      transition: background 0.25s, color 0.25s;
    }
    .sidebar-cat-list li a:hover {
      background: var(--primary-soft);
      color: var(--primary);
    }
    .sidebar-cat-list li.active a {
      background: var(--primary-soft);
      color: var(--primary);
      border-left: 3px solid var(--accent);
    }
    .tag-cloud {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-bottom: 20px;
    }
    .tag-cloud a {
      background: var(--primary-soft);
      padding: 6px 14px;
      border-radius: var(--radius-tag);
      font-size: 0.8125rem;
      color: var(--primary-deep);
      transition: background 0.25s, color 0.25s;
    }
    .tag-cloud a:hover {
      background: var(--primary);
      color: #fff;
    }
    .sidebar-img-card {
      padding: 0;
      overflow: hidden;
      border: none;
    }
    .sidebar-img-card img {
      width: 100%;
      height: 180px;
      object-fit: cover;
      transition: transform 0.4s ease;
    }
    .sidebar-img-card:hover img {
      transform: scale(1.02);
    }

    /* ===== 通用板块 ===== */
    .section-space {
      padding: 72px 0;
    }
    .section-head {
      text-align: center;
      max-width: 720px;
      margin: 0 auto 48px;
    }
    .section-tag {
      display: inline-block;
      background: var(--primary-soft);
      color: var(--primary-deep);
      font-size: 0.8125rem;
      font-weight: 600;
      padding: 6px 16px;
      border-radius: 999px;
      margin-bottom: 12px;
      letter-spacing: 0.04em;
    }
    .section-head h2 {
      font-size: 1.875rem;
      font-weight: 700;
      color: var(--text-primary);
      margin-bottom: 12px;
      line-height: 1.3;
    }
    .section-head p {
      color: var(--text-secondary);
      font-size: 1rem;
    }

    /* ===== 数据能力 ===== */
    .data-insight {
      background: var(--bg-deep);
      color: #fff;
    }
    .data-insight .section-head h2 {
      color: #fff;
    }
    .data-insight .section-head p {
      color: rgba(255,255,255,0.7);
    }
    .data-insight .section-tag {
      background: rgba(255,255,255,0.12);
      color: var(--aqua);
    }
    .insight-grid {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px 48px;
    }
    .insight-item {
      background: rgba(255,255,255,0.05);
      border: 1px solid rgba(255,255,255,0.1);
      border-radius: var(--radius-card);
      padding: 28px;
      transition: background 0.3s;
    }
    .insight-item:hover {
      background: rgba(255,255,255,0.08);
    }
    .wave-line {
      width: 32px;
      height: 6px;
      background: var(--accent);
      border-radius: 999px;
      margin-bottom: 16px;
      position: relative;
    }
    .wave-line::before,
    .wave-line::after {
      content: "";
      position: absolute;
      height: 6px;
      background: var(--accent);
      border-radius: 999px;
      top: 0;
    }
    .wave-line::before {
      left: -10px;
      width: 8px;
    }
    .wave-line::after {
      right: -10px;
      width: 12px;
    }
    .insight-num {
      font-size: 2.75rem;
      font-weight: 700;
      color: var(--accent);
      line-height: 1.2;
      margin-bottom: 8px;
    }
    .insight-label {
      color: rgba(255,255,255,0.8);
      font-size: 0.9375rem;
    }

    /* ===== 服务流程 ===== */
    .process-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .process-item {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius-card);
      padding: 28px 24px;
      text-align: center;
      transition: box-shadow 0.3s, transform 0.3s;
    }
    .process-item:hover {
      box-shadow: var(--shadow-hover);
      transform: translateY(-2px);
    }
    .process-step {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: var(--primary-soft);
      color: var(--primary);
      font-weight: 700;
      font-size: 1.25rem;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 16px;
    }
    .process-item h3 {
      font-size: 1.0625rem;
      font-weight: 600;
      margin-bottom: 8px;
      color: var(--text-primary);
    }
    .process-item p {
      font-size: 0.875rem;
      color: var(--text-secondary);
      line-height: 1.6;
    }

    /* ===== FAQ ===== */
    .faq-layout {
      display: flex;
      gap: 48px;
      align-items: flex-start;
    }
    .faq-title-col {
      flex: 0 0 35%;
      max-width: 35%;
    }
    .faq-title-col h2 {
      font-size: 1.875rem;
      font-weight: 700;
      color: var(--text-primary);
      line-height: 1.3;
      margin-bottom: 12px;
    }
    .faq-title-col p {
      color: var(--text-secondary);
      margin-bottom: 24px;
    }
    .faq-list-col {
      flex: 1;
    }
    .faq-item {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: 12px;
      margin-bottom: 12px;
      overflow: hidden;
    }
    .faq-item summary {
      list-style: none;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      padding: 16px 20px;
      cursor: pointer;
      font-weight: 600;
      color: var(--text-primary);
      font-size: 1rem;
      border-left: 6px solid var(--primary);
      background: var(--bg-card);
    }
    .faq-item summary::-webkit-details-marker {
      display: none;
    }
    .faq-item summary::after {
      content: "+";
      font-size: 1.4rem;
      color: var(--primary);
      transition: transform 0.25s;
      font-weight: 400;
    }
    .faq-item[open] summary::after {
      content: "×";
    }
    .faq-answer {
      padding: 0 20px 18px;
      color: var(--text-secondary);
      font-size: 0.9375rem;
      line-height: 1.7;
      border-left: 6px solid var(--primary);
    }

    /* ===== CTA 横条 ===== */
    .cta-section {
      padding: 0 0 72px;
    }
    .cta-strip {
      background: var(--primary-soft);
      border-radius: 16px;
      padding: 40px 44px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 32px;
      box-shadow: var(--shadow-card);
      position: relative;
      overflow: hidden;
    }
    .cta-strip h3 {
      font-size: 1.5rem;
      font-weight: 700;
      color: var(--text-primary);
      margin-bottom: 8px;
    }
    .cta-strip p {
      color: var(--text-secondary);
      margin-bottom: 0;
    }

    /* ===== Footer ===== */
    .site-footer {
      background: var(--primary-deep);
      color: rgba(255,255,255,0.8);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1.2fr;
      gap: 48px;
      padding: 64px 0 40px;
    }
    .footer-brand .logo-text {
      color: #fff;
    }
    .footer-desc {
      color: rgba(255,255,255,0.7);
      font-size: 0.9375rem;
      line-height: 1.7;
      margin: 16px 0 20px;
      max-width: 360px;
    }
    .footer-socials {
      display: flex;
      gap: 12px;
    }
    .footer-socials a {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: rgba(255,255,255,0.1);
      color: rgba(255,255,255,0.8);
      display: flex;
      align-items: center;
      justify-content: center;
      transition: background 0.25s, color 0.25s;
      font-size: 0.8125rem;
      font-weight: 600;
    }
    .footer-socials a:hover {
      background: var(--accent);
      color: #fff;
    }
    .footer-col h4 {
      color: #fff;
      font-size: 1rem;
      font-weight: 600;
      margin-bottom: 16px;
    }
    .footer-col a {
      display: block;
      color: rgba(255,255,255,0.7);
      padding: 6px 0;
      transition: color 0.25s;
    }
    .footer-col a:hover {
      color: var(--accent);
    }
    .footer-col p {
      color: rgba(255,255,255,0.7);
      padding: 4px 0;
      font-size: 0.9375rem;
    }
    .footer-bottom {
      border-top: 1px solid rgba(255,255,255,0.1);
      padding: 20px 0;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 8px;
      color: rgba(255,255,255,0.6);
      font-size: 0.875rem;
    }
    .footer-bottom a {
      color: rgba(255,255,255,0.6);
      transition: color 0.25s;
    }
    .footer-bottom a:hover {
      color: #fff;
    }

    /* ===== 响应式 ===== */
    @media (max-width: 1024px) {
      .page-hero-inner {
        flex-direction: column;
      }
      .page-hero-visual {
        flex: none;
        width: 100%;
      }
      .page-hero h1 {
        font-size: 2.25rem;
      }
      .category-layout {
        flex-direction: column;
      }
      .category-content,
      .category-sidebar {
        max-width: 100%;
        flex: none;
        width: 100%;
      }
      .process-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .faq-layout {
        flex-direction: column;
      }
      .faq-title-col {
        max-width: 100%;
        flex: none;
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .cta-strip {
        flex-direction: column;
        text-align: center;
      }
    }

    @media (max-width: 768px) {
      .container {
        padding: 0 24px;
      }
      .main-nav {
        position: fixed;
        top: 76px;
        left: 0;
        right: 0;
        background: #fff;
        flex-direction: column;
        align-items: stretch;
        padding: 8px 24px 24px;
        gap: 0;
        box-shadow: 0 12px 32px rgba(6,62,72,0.12);
        display: none;
        z-index: 99;
        max-height: calc(100vh - 76px);
        overflow-y: auto;
      }
      .main-nav.open {
        display: flex;
      }
      .main-nav a {
        padding: 12px 4px;
        font-size: 1.25rem;
        border-bottom: 1px solid var(--border);
        line-height: 48px;
      }
      .main-nav a.active {
        border-bottom: 2px wavy var(--accent);
      }
      .nav-cta-mobile {
        display: block;
        padding: 16px 0 8px;
      }
      .header-cta {
        display: none;
      }
      .nav-toggle {
        display: flex;
      }
      .page-hero {
        padding: 48px 0 40px;
      }
      .page-hero h1 {
        font-size: 2rem;
      }
      .page-hero-visual img {
        height: 180px;
      }
      .category-main {
        padding: 16px 0 56px;
      }
      .entry-card {
        padding: 16px;
        gap: 16px;
      }
      .entry-date {
        flex-basis: 52px;
        padding: 10px 6px;
      }
      .entry-date .day {
        font-size: 1.25rem;
      }
      .entry-body h3 {
        font-size: 1.125rem;
      }
      .entry-body p {
        -webkit-line-clamp: 3;
      }
      .insight-grid {
        grid-template-columns: 1fr;
        gap: 16px;
      }
      .process-grid {
        grid-template-columns: 1fr;
      }
      .section-space {
        padding: 56px 0;
      }
      .section-head h2 {
        font-size: 1.5rem;
      }
      .cta-section {
        padding-bottom: 56px;
      }
      .cta-strip {
        padding: 28px 24px;
      }
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
        padding: 48px 0 32px;
      }
      .footer-bottom {
        flex-direction: column;
        justify-content: center;
        text-align: center;
      }
    }

    @media (max-width: 520px) {
      .container {
        padding: 0 16px;
      }
      .page-hero-visual {
        border-radius: 14px;
      }
      .page-hero-visual img {
        height: 150px;
      }
      .entry-card {
        flex-direction: column;
      }
      .entry-date {
        display: flex;
        align-items: center;
        gap: 8px;
        flex: none;
        width: auto;
        padding: 6px 14px;
      }
      .entry-date .day {
        font-size: 1.125rem;
      }
      .entry-date .month {
        margin-top: 0;
      }
      .btn {
        padding: 13px 24px;
        font-size: 1rem;
      }
      .cta-strip .btn {
        width: 100%;
      }
      .tag-cloud a {
        padding: 5px 12px;
      }
    }