:root {
  --primary: #2E6B9E;
  --primary-dark: #24537D;
  --primary-light: #EDF3F8;
  --accent: #C9A063;
  --accent-light: #F7EFE3;
  --accent-dark: #8A6D3B;
  --bg: #F7F9FB;
  --card-bg: #FFFFFF;
  --border: #E2E8F0;
  --text: #1A2633;
  --text-secondary: #5A6B7B;
  --text-muted: #8D9AAA;
  --footer-bg: #1F2A36;
  --footer-text: #A7B1BC;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 20px rgba(30,64,95,0.06);
  --shadow-lg: 0 8px 28px rgba(30,64,95,0.10);
  --section-pad: 88px;
  --header-h: 72px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.8;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
a { color: var(--primary); text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--primary-dark); text-decoration: underline; }
img { max-width: 100%; display: block; }
ul, ol { list-style: none; }
button, input, select, textarea { font-family: inherit; font-size: inherit; color: inherit; }
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: var(--section-pad) 0; }
.section-header { text-align: center; max-width: 760px; margin: 0 auto 48px; }
.section-tag {
  display: inline-block; background: var(--accent-light); color: var(--accent-dark);
  font-size: 13px; font-weight: 600; padding: 5px 16px; border-radius: 999px; margin-bottom: 14px;
}
.section-title { font-size: 30px; font-weight: 700; line-height: 1.35; margin-bottom: 14px; letter-spacing: -0.01em; }
.section-desc { color: var(--text-secondary); font-size: 15px; }

/* ===== Buttons ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 12px 26px; border-radius: var(--radius-sm); font-size: 15px; font-weight: 600;
  text-align: center; border: 1px solid transparent; cursor: pointer;
  transition: all .25s ease; line-height: 1.4; white-space: nowrap;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); color: #fff; text-decoration: none; transform: translateY(-2px); box-shadow: 0 8px 20px rgba(46,107,158,.28); }
.btn-outline { background: transparent; color: var(--primary); border-color: var(--primary); }
.btn-outline:hover { background: var(--primary-light); text-decoration: none; transform: translateY(-1px); }
.btn-light { background: #fff; color: var(--primary); }
.btn-light:hover { background: var(--primary-light); color: var(--primary-dark); text-decoration: none; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,.15); }
.btn-lg { padding: 14px 34px; font-size: 16px; }
.btn-block { width: 100%; }

/* ===== Header / Nav ===== */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  box-shadow: 0 2px 16px rgba(30,64,95,.04);
}
.header-inner {
  max-width: 1200px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  height: var(--header-h); padding: 0 24px;
}
.logo {
  display: flex; align-items: center; gap: 10px;
  font-size: 20px; font-weight: 800; color: var(--text);
  white-space: nowrap;
}
.logo:hover { color: var(--text); text-decoration: none; }
.logo .logo-main { color: var(--primary); }
.logo-dot { width: 10px; height: 10px; background: var(--accent); border-radius: 50%; flex-shrink: 0; }
.logo-sub { font-size: 13px; font-weight: 600; color: var(--text-muted); margin-left: 2px; }

.main-nav { display: flex; gap: 6px; align-items: center; }
.main-nav a {
  padding: 8px 16px; border-radius: 8px; color: var(--text-secondary);
  font-weight: 500; font-size: 15px; transition: all .2s ease;
}
.main-nav a:hover { color: var(--primary); background: var(--primary-light); text-decoration: none; }
.main-nav a.active { color: var(--primary); background: var(--primary-light); font-weight: 700; }

.header-actions { display: flex; align-items: center; gap: 14px; }

.lang-switch {
  position: relative;
  display: flex; align-items: center; gap: 6px;
  padding: 7px 16px; border: 1px solid var(--border); border-radius: 999px;
  background: #fff; color: var(--primary); font-size: 13px; font-weight: 600;
  cursor: pointer; transition: all .2s ease;
}
.lang-switch:hover { border-color: var(--primary); background: var(--primary-light); }
.lang-switch .caret { font-size: 10px; }
.lang-dropdown {
  position: absolute; top: calc(100% + 10px); right: 0; z-index: 50;
  background: #fff; border: 1px solid var(--border); border-radius: 10px;
  box-shadow: var(--shadow-lg); min-width: 150px; padding: 6px;
  opacity: 0; visibility: hidden; transform: translateY(-4px);
  transition: all .22s ease;
}
.lang-switch:hover .lang-dropdown,
.lang-switch:focus-within .lang-dropdown {
  opacity: 1; visibility: visible; transform: translateY(0);
}
.lang-dropdown a {
  display: block; padding: 8px 12px; border-radius: 6px;
  color: var(--text-secondary); font-size: 14px;
}
.lang-dropdown a:hover { background: var(--primary-light); color: var(--primary); text-decoration: none; }

.burger {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 8px;
}
.burger span { width: 22px; height: 2px; background: var(--text); border-radius: 2px; transition: all .25s ease; }

.mobile-actions { display: none; }

/* ===== Hero ===== */
.hero {
  position: relative;
  background: linear-gradient(160deg, #E8F0F7 0%, #F7F9FB 60%, #FFFFFF 100%);
  padding: 84px 0 76px;
  overflow: hidden;
  text-align: center;
}
.hero-bg {
  position: absolute; inset: 0; z-index: 0;
  background-image: url('/assets/images/backpic/back-1.jpg');
  background-size: cover; background-position: center;
  opacity: .10;
}
.hero:after {
  content: '';
  position: absolute; bottom: 0; left: 0; right: 0; height: 80px;
  background: linear-gradient(to top, rgba(247,249,251,.9), transparent);
  z-index: 1;
}
.hero .container { position: relative; z-index: 2; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: var(--accent-light); color: var(--accent-dark);
  border: 1px solid #E4CEA4;
  font-size: 13px; font-weight: 700;
  padding: 6px 18px; border-radius: 999px;
  margin-bottom: 22px;
}
.hero-badge .badge-star { color: var(--accent); font-size: 15px; }
.hero-title {
  font-size: 38px; font-weight: 800; line-height: 1.3;
  color: var(--text); letter-spacing: -0.01em;
  max-width: 900px; margin: 0 auto 18px;
}
.hero-title .hl { color: var(--primary); }
.hero-desc {
  max-width: 720px; margin: 0 auto 28px;
  color: var(--text-secondary); font-size: 16px; line-height: 1.9;
}
.hero-offer {
  display: inline-flex; align-items: center; gap: 10px;
  background: #fff; border: 1px dashed var(--accent);
  border-radius: 999px; padding: 8px 20px;
  font-size: 14px; color: var(--text-secondary);
  margin-bottom: 32px;
}
.hero-offer .offer-badge {
  background: var(--accent); color: #fff;
  font-size: 12px; font-weight: 700;
  padding: 2px 12px; border-radius: 999px;
}
.hero-btns { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }
.hero-points {
  display: flex; justify-content: center; gap: 0;
  margin-top: 52px; padding-top: 36px;
  border-top: 1px solid var(--border);
  max-width: 720px; margin-left: auto; margin-right: auto;
}
.hero-point { flex: 1; text-align: center; }
.hero-point + .hero-point { border-left: 1px solid var(--border); }
.hero-point span { display: block; font-size: 13px; color: var(--text-muted); margin-bottom: 4px; }
.hero-point strong { display: block; font-size: 22px; font-weight: 700; color: var(--primary); }

/* ===== Catalog / Directory ===== */
.catalog-section { background: #fff; border-bottom: 1px solid var(--border); }
.catalog-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px;
}
.catalog-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: transform .28s ease, box-shadow .28s ease;
}
.catalog-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.catalog-card img { width: 100%; height: 190px; object-fit: cover; }
.catalog-body { padding: 26px 26px 28px; position: relative; }
.catalog-num {
  position: absolute; top: -16px; right: 20px;
  font-size: 44px; font-weight: 800; color: var(--primary-light);
  line-height: 1; z-index: 0; pointer-events: none;
}
.catalog-body h3 { font-size: 19px; font-weight: 700; margin-bottom: 10px; position: relative; }
.catalog-body p { color: var(--text-secondary); font-size: 14px; line-height: 1.8; margin-bottom: 14px; }
.catalog-body a { font-size: 14px; font-weight: 600; }

/* ===== Value ===== */
.value-wrap {
  display: grid; grid-template-columns: 1fr 1.4fr; gap: 36px;
  align-items: stretch;
}
.value-pain {
  background: var(--primary-light);
  border-radius: var(--radius);
  padding: 34px 32px;
}
.value-pain h3 { font-size: 20px; font-weight: 700; margin-bottom: 20px; }
.value-pain ul { display: flex; flex-direction: column; gap: 14px; }
.value-pain li {
  position: relative; padding-left: 24px;
  color: var(--text-secondary); font-size: 15px; line-height: 1.7;
}
.value-pain li::before {
  content: ''; position: absolute; left: 0; top: 10px;
  width: 8px; height: 8px; border-radius: 2px;
  background: var(--accent);
}
.value-solution {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
}
.solution-header {
  background: var(--primary); color: #fff;
  font-weight: 700; font-size: 16px;
  padding: 14px 28px;
  letter-spacing: .02em;
}
.value-solution .inner { padding: 30px 28px; }
.value-solution .inner > p { color: var(--text-secondary); font-size: 15px; line-height: 1.85; }
.solution-list { margin-top: 20px; display: flex; flex-direction: column; gap: 12px; }
.solution-list li {
  display: flex; gap: 10px;
  font-size: 15px; color: var(--text-secondary);
}
.solution-list li::before {
  content: '✓'; color: var(--primary); font-weight: 700; flex-shrink: 0;
}
.solution-list strong { color: var(--text); font-weight: 600; }
.value-solution .btn { margin-top: 24px; }

/* ===== Stats ===== */
.stats-bar {
  background: linear-gradient(135deg, #EDF3F8, #F7FAFC);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: flex; justify-content: space-between;
  padding: 40px 48px;
  box-shadow: var(--shadow);
}
.stat-item { text-align: center; flex: 1; }
.stat-item + .stat-item { border-left: 1px solid var(--border); }
.stat-item strong {
  display: block; font-size: 32px; font-weight: 800;
  color: var(--primary); line-height: 1.2;
}
.stat-item span {
  display: inline-block; margin-top: 4px;
  font-size: 14px; color: var(--text-muted);
}

/* ===== Testimonials ===== */
.testimonials-section { background: #fff; border-bottom: 1px solid var(--border); }
.testimonial-list {
  max-width: 840px; margin: 0 auto;
  display: flex; flex-direction: column; gap: 24px;
}
.testimonial-list blockquote {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-left: 4px solid var(--primary);
  border-radius: 0 var(--radius) var(--radius) 0;
  padding: 28px 32px;
  box-shadow: var(--shadow);
  position: relative;
}
.testimonial-list blockquote p {
  font-size: 15px; color: var(--text-secondary); line-height: 1.85;
}
.testimonial-list cite {
  display: block; margin-top: 14px;
  font-style: normal; font-size: 14px; font-weight: 600;
  color: var(--text-muted);
}

/* ===== News ===== */
.news-section { background: var(--bg); }
.news-list {
  max-width: 860px; margin: 0 auto;
  display: flex; flex-direction: column; gap: 20px;
}
.news-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 26px 30px;
  box-shadow: var(--shadow);
  transition: transform .25s ease, box-shadow .25s ease;
}
.news-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); }
.news-meta { display: flex; align-items: center; gap: 12px; margin-bottom: 10px; }
.news-cat {
  display: inline-block;
  background: var(--accent-light); color: var(--accent-dark);
  font-size: 12px; font-weight: 600;
  padding: 2px 12px; border-radius: 999px;
}
.news-date { font-size: 13px; color: var(--text-muted); }
.news-card h3 { font-size: 18px; font-weight: 700; line-height: 1.5; margin-bottom: 8px; }
.news-card h3 a { color: var(--text); }
.news-card h3 a:hover { color: var(--primary); text-decoration: none; }
.news-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.8; }
.news-link { display: inline-block; margin-top: 12px; font-size: 14px; font-weight: 600; }
.news-empty {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  background: #FAFBFC;
  padding: 56px 20px;
  text-align: center;
  color: var(--text-muted);
  font-size: 15px;
}

/* ===== FAQ ===== */
.faq-list { max-width: 840px; margin: 0 auto; display: flex; flex-direction: column; gap: 14px; }
.faq-item {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: box-shadow .25s ease;
}
.faq-item:hover { box-shadow: var(--shadow-lg); }
.faq-item summary {
  display: flex; align-items: center; gap: 14px;
  padding: 18px 22px;
  cursor: pointer;
  font-size: 15px; font-weight: 600;
  list-style: none; user-select: none;
  transition: background .2s ease;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary:hover { background: var(--primary-light); }
.faq-q {
  flex-shrink: 0;
  width: 32px; height: 32px;
  background: var(--primary-light); color: var(--primary);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: 14px; font-weight: 800;
}
.faq-item[open] summary .faq-q { background: var(--primary); color: #fff; }
.faq-item summary::after {
  content: '+'; margin-left: auto; font-size: 22px; font-weight: 400;
  color: var(--text-muted); transition: transform .2s ease;
}
.faq-item[open] summary::after { content: '−'; color: var(--primary); }
.faq-a { padding: 0 22px 20px 68px; }
.faq-a p { font-size: 14px; color: var(--text-secondary); line-height: 1.85; }

/* ===== CTA ===== */
.cta-section { padding: var(--section-pad) 0; }
.cta-card {
  position: relative;
  background: linear-gradient(135deg, var(--primary) 0%, #2A5F8C 100%);
  border-radius: 16px;
  padding: 64px 48px;
  text-align: center;
  color: #fff;
  overflow: hidden;
  box-shadow: 0 12px 40px rgba(46,107,158,.25);
}
.cta-accent {
  position: absolute; bottom: 0; left: 0; right: 0; height: 6px;
  background: var(--accent);
}
.cta-card h2 { font-size: 30px; font-weight: 800; margin-bottom: 14px; }
.cta-card > p { font-size: 15px; color: rgba(255,255,255,.9); max-width: 600px; margin: 0 auto 30px; line-height: 1.85; }
.cta-form {
  display: flex; gap: 12px; justify-content: center;
  max-width: 560px; margin: 0 auto;
  flex-wrap: wrap;
}
.cta-form input {
  flex: 1; min-width: 260px;
  background: rgba(255,255,255,.92);
  border: 1px solid rgba(255,255,255,.4);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  color: var(--text);
  font-size: 15px;
  outline: none;
  transition: all .22s ease;
}
.cta-form input:focus {
  background: #fff;
  border-color: #fff;
  box-shadow: 0 0 0 4px rgba(255,255,255,.25);
}
.cta-form input::placeholder { color: var(--text-muted); }
.cta-sub-link {
  display: inline-block; margin-top: 20px;
  color: rgba(255,255,255,.85);
  font-size: 14px;
  border-bottom: 1px solid rgba(255,255,255,.4);
  padding-bottom: 2px;
}
.cta-sub-link:hover { color: #fff; border-bottom-color: #fff; text-decoration: none; }

/* ===== Footer ===== */
.site-footer {
  background: var(--footer-bg);
  color: var(--footer-text);
  padding: 64px 0 0;
  font-size: 14px;
}
.footer-grid {
  display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 48px;
}
.footer-logo {
  display: flex; align-items: center; gap: 10px;
  font-size: 18px; font-weight: 800; color: #fff;
  margin-bottom: 14px;
}
.footer-brand p { line-height: 1.8; color: var(--footer-text); max-width: 300px; }
.footer-col h4 {
  color: #fff; font-size: 15px; font-weight: 700;
  margin-bottom: 16px;
}
.footer-col ul { display: flex; flex-direction: column; gap: 8px; }
.footer-col a { color: var(--footer-text); }
.footer-col a:hover { color: #fff; text-decoration: none; }
.footer-contact p { line-height: 1.7; margin-bottom: 6px; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding: 22px 0;
  display: flex; justify-content: space-between;
  flex-wrap: wrap; gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .catalog-grid { grid-template-columns: repeat(3, 1fr); gap: 20px; }
  .value-wrap { grid-template-columns: 1fr; gap: 24px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  :root { --section-pad: 56px; }
  .burger { display: flex; }
  .main-nav {
    display: none;
    position: absolute; top: var(--header-h); left: 0; right: 0;
    background: #fff;
    border-bottom: 1px solid var(--border);
    box-shadow: 0 12px 28px rgba(30,64,95,.08);
    flex-direction: column;
    align-items: stretch;
    padding: 16px 24px 24px;
    gap: 4px;
  }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 12px 16px; font-size: 16px; }
  .header-actions .lang-switch { display: none; }
  .header-actions .btn { display: none; }
  .mobile-actions {
    display: none;
    margin-top: 14px; padding-top: 16px;
    border-top: 1px solid var(--border);
    flex-direction: column; gap: 12px;
  }
  .main-nav.open .mobile-actions { display: flex; }
  .mobile-actions .lang-switch {
    display: inline-flex;
    margin-right: auto;
  }

  .hero { padding: 60px 0 52px; }
  .hero-title { font-size: 28px; }
  .hero-desc { font-size: 15px; }
  .hero-points { flex-direction: column; gap: 24px; padding-top: 28px; }
  .hero-point + .hero-point { border-left: none; }
  .hero-point strong { font-size: 20px; }

  .catalog-grid { grid-template-columns: 1fr; }
  .stats-bar { flex-direction: column; gap: 28px; padding: 32px 24px; }
  .stat-item + .stat-item { border-left: none; }

  .testimonial-list blockquote { padding: 22px 20px; }

  .news-card { padding: 20px 22px; }

  .faq-a { padding-left: 22px; }
  .faq-item summary::after { margin-left: 0; }

  .cta-card { padding: 44px 24px; }
  .cta-card h2 { font-size: 24px; }
  .cta-form { flex-direction: column; }
  .cta-form input { min-width: 0; width: 100%; }

  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

@media (max-width: 520px) {
  .logo { font-size: 17px; }
  .logo-sub { display: none; }
  .hero-title { font-size: 24px; }
  .hero-offer { flex-direction: column; border-radius: 16px; padding: 12px 18px; }
  .hero-btns .btn { width: 100%; }
  .section-title { font-size: 24px; }
  .section-desc { font-size: 14px; }
  .value-pain, .value-solution .inner { padding: 24px 20px; }
  .stats-bar { padding: 24px 16px; }
  .stat-item strong { font-size: 26px; }
  .news-card h3 { font-size: 16px; }
  .faq-item summary { font-size: 14px; padding: 16px 14px; }
  .faq-a { padding: 0 14px 18px 14px; }
}

:root {
            --primary: #2E6B9E;
            --primary-dark: #24537D;
            --primary-light: #EAF1F8;
            --accent: #C9A063;
            --accent-dark: #8A6D3B;
            --accent-light: #F5EDE1;
            --bg: #F7F9FB;
            --card: #FFFFFF;
            --border: #E2E8F0;
            --text: #1A2633;
            --text-secondary: #5A6B7B;
            --text-muted: #8D9AAA;
            --footer-bg: #1F2A36;
            --footer-text: #A7B1BC;
            --radius-lg: 12px;
            --radius-sm: 8px;
            --shadow: 0 4px 20px rgba(30, 64, 95, 0.06);
            --shadow-hover: 0 8px 28px rgba(30, 64, 95, 0.10);
            --container: 1200px;
            --article-width: 860px;
            --transition: all 0.25s ease;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.7;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

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

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

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

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

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

        .container-article {
            max-width: var(--article-width);
        }

        /* ====== Header / Nav ====== */
        .site-header {
            background: #fff;
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 100;
            box-shadow: 0 1px 4px rgba(30, 64, 95, 0.04);
        }

        .header-inner {
            max-width: var(--container);
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 70px;
            padding: 0 24px;
            gap: 24px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 20px;
            font-weight: 800;
            color: var(--text);
            white-space: nowrap;
            line-height: 1.2;
        }

        .logo:hover {
            text-decoration: none;
        }

        .logo-dot {
            width: 10px;
            height: 10px;
            background: var(--primary);
            border-radius: 50%;
            flex-shrink: 0;
            display: block;
        }

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

        .logo-sub {
            font-size: 13px;
            font-weight: 500;
            color: var(--text-muted);
            margin-left: 2px;
        }

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

        .main-nav>a {
            font-weight: 500;
            font-size: 15px;
            color: var(--text-secondary);
            position: relative;
            padding: 6px 2px;
        }

        .main-nav>a:hover {
            color: var(--primary);
            text-decoration: none;
        }

        .main-nav>a.active {
            color: var(--primary);
            font-weight: 700;
        }

        .main-nav>a.active::after {
            content: "";
            position: absolute;
            left: 0;
            bottom: -2px;
            width: 100%;
            height: 3px;
            background: var(--primary);
            border-radius: 2px;
        }

        .header-actions {
            display: flex;
            align-items: center;
            gap: 14px;
            flex-shrink: 0;
        }

        .lang-switch {
            position: relative;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 16px;
            border: 1px solid var(--border);
            border-radius: 999px;
            background: var(--bg);
            font-size: 13px;
            color: var(--text-secondary);
            cursor: pointer;
            transition: var(--transition);
            user-select: none;
        }

        .lang-switch:hover {
            border-color: var(--primary);
            color: var(--primary);
        }

        .lang-switch .caret {
            font-size: 11px;
            opacity: 0.7;
        }

        .lang-dropdown {
            position: absolute;
            top: calc(100% + 8px);
            left: 0;
            min-width: 150px;
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            box-shadow: var(--shadow-hover);
            padding: 8px 0;
            opacity: 0;
            visibility: hidden;
            transform: translateY(-6px);
            transition: var(--transition);
            z-index: 200;
        }

        .lang-switch:hover .lang-dropdown {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        .lang-dropdown a {
            display: block;
            padding: 10px 16px;
            font-size: 14px;
            color: var(--text);
        }

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

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 24px;
            border-radius: 8px;
            font-size: 15px;
            font-weight: 600;
            border: 1.5px solid transparent;
            transition: var(--transition);
            white-space: nowrap;
            cursor: pointer;
            line-height: 1.4;
        }

        .btn:hover {
            text-decoration: none;
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(46, 107, 158, 0.2);
        }

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

        .btn:focus-visible {
            outline: 3px solid rgba(46, 107, 158, 0.3);
            outline-offset: 2px;
        }

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

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

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

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

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

        .btn-white:hover {
            background: rgba(255, 255, 255, 0.9);
            color: var(--primary-dark);
            box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
        }

        .btn-block {
            width: 100%;
            justify-content: center;
        }

        .mobile-actions {
            display: none;
        }

        .burger {
            display: none;
            flex-direction: column;
            gap: 5px;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            background: var(--bg);
            border: 1px solid var(--border);
            padding: 8px;
        }

        .burger span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--text);
            border-radius: 2px;
            transition: var(--transition);
        }

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

        /* ====== Breadcrumb ====== */
        .breadcrumb-wrap {
            background: var(--card);
            border-bottom: 1px solid var(--border);
            padding: 14px 0;
        }

        .breadcrumb {
            font-size: 13px;
            color: var(--text-muted);
            display: flex;
            align-items: center;
            flex-wrap: wrap;
            gap: 8px;
        }

        .breadcrumb a {
            color: var(--text-secondary);
            font-size: 13px;
        }

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

        .breadcrumb .sep {
            color: var(--border);
            font-size: 12px;
        }

        .breadcrumb .current {
            color: var(--primary);
            font-weight: 500;
            max-width: 320px;
            overflow: hidden;
            text-overflow: ellipsis;
            white-space: nowrap;
        }

        /* ====== Article Main ====== */
        .article-main {
            padding: 48px 0 40px;
        }

        .article-card {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            box-shadow: var(--shadow);
            padding: 52px 60px 44px;
            margin-bottom: 48px;
        }

        .article-head {
            text-align: center;
            margin-bottom: 36px;
        }

        .article-tag {
            display: inline-block;
            background: var(--accent-light);
            color: var(--accent-dark);
            font-size: 13px;
            font-weight: 600;
            padding: 5px 16px;
            border-radius: 999px;
            margin-bottom: 18px;
            letter-spacing: 0.5px;
        }

        .article-head h1 {
            font-size: 34px;
            font-weight: 800;
            line-height: 1.35;
            color: var(--text);
            margin: 0 0 20px;
            word-break: break-word;
        }

        .article-meta {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 8px 24px;
            flex-wrap: wrap;
            font-size: 14px;
            color: var(--text-muted);
        }

        .article-meta .meta-item {
            display: inline-flex;
            align-items: center;
            gap: 5px;
        }

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

        .meta-cat {
            background: var(--primary-light);
            color: var(--primary);
            font-size: 13px;
            font-weight: 600;
            padding: 2px 10px;
            border-radius: 4px;
        }

        .article-cover {
            margin-top: 32px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            border: 1px solid var(--border);
        }

        .article-cover img {
            width: 100%;
            object-fit: cover;
        }

        /* ====== Article Content ====== */
        .article-content {
            font-size: 16px;
            line-height: 1.85;
            color: var(--text);
        }

        .article-content p {
            margin-bottom: 1.5em;
        }

        .article-content h2,
        .article-content h3,
        .article-content h4 {
            color: var(--primary);
            font-weight: 700;
            margin: 1.8em 0 0.8em;
            line-height: 1.4;
        }

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

        .article-content h3 {
            font-size: 20px;
        }

        .article-content h4 {
            font-size: 17px;
        }

        .article-content ul,
        .article-content ol {
            margin: 0 0 1.6em;
            padding-left: 1.4em;
        }

        .article-content ul li,
        .article-content ol li {
            margin-bottom: 0.5em;
        }

        .article-content ul li::marker {
            color: var(--primary);
        }

        .article-content ol li::marker {
            color: var(--primary);
            font-weight: 600;
        }

        .article-content img {
            border-radius: var(--radius-sm);
            border: 1px solid var(--border);
            margin: 1.6em auto;
            max-width: 100%;
            height: auto;
        }

        .article-content blockquote {
            border-left: 4px solid var(--primary);
            background: var(--primary-light);
            padding: 18px 24px;
            margin: 1.8em 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-size: 15px;
        }

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

        .article-content a {
            text-decoration: underline;
            text-underline-offset: 3px;
        }

        .article-content table {
            width: 100%;
            border-collapse: collapse;
            margin: 1.6em 0;
            font-size: 15px;
        }

        .article-content table th,
        .article-content table td {
            border: 1px solid var(--border);
            padding: 12px 16px;
            text-align: left;
        }

        .article-content table th {
            background: var(--bg);
            font-weight: 600;
            color: var(--text);
        }

        .article-content code {
            background: var(--bg);
            border-radius: 4px;
            padding: 2px 6px;
            font-size: 0.9em;
            font-family: "SF Mono", Consolas, monospace;
            color: var(--primary);
        }

        .article-content pre {
            background: #1F2A36;
            border-radius: var(--radius-sm);
            padding: 20px;
            overflow-x: auto;
            margin: 1.6em 0;
        }

        .article-content pre code {
            background: transparent;
            color: #D1DFE8;
            padding: 0;
        }

        /* ====== Article Tags ====== */
        .article-tags-row {
            border-top: 1px dashed var(--border);
            margin-top: 40px;
            padding-top: 24px;
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
        }

        .tag {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 13px;
            font-weight: 500;
            padding: 5px 14px;
            border-radius: 999px;
            transition: var(--transition);
        }

        .tag:hover {
            background: var(--primary);
            color: #fff;
            text-decoration: none;
        }

        .tag-accent {
            background: var(--accent-light);
            color: var(--accent-dark);
        }

        /* ====== Empty State ====== */
        .empty-state {
            border: 2px dashed var(--border);
            border-radius: var(--radius-lg);
            padding: 64px 24px;
            text-align: center;
            background: var(--bg);
        }

        .empty-state .empty-icon {
            font-size: 44px;
            margin-bottom: 16px;
            opacity: 0.5;
        }

        .empty-state p {
            font-size: 18px;
            color: var(--text-secondary);
            margin-bottom: 20px;
            font-weight: 500;
        }

        .empty-state .btn {
            min-width: 140px;
        }

        /* ====== Related Section ====== */
        .related-section {
            padding: 0 0 48px;
        }

        .section-head {
            display: flex;
            align-items: center;
            justify-content: space-between;
            margin-bottom: 28px;
            gap: 16px;
            flex-wrap: wrap;
        }

        .section-head h2 {
            font-size: 26px;
            font-weight: 700;
            color: var(--text);
            position: relative;
            padding-left: 18px;
        }

        .section-head h2::before {
            content: "";
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 6px;
            height: 24px;
            background: var(--accent);
            border-radius: 3px;
        }

        .section-link {
            font-size: 14px;
            font-weight: 500;
            color: var(--primary);
            white-space: nowrap;
        }

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

        .related-list .card-item {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            padding: 22px 26px;
            margin-bottom: 16px;
            transition: var(--transition);
            display: flex;
            gap: 18px;
            align-items: flex-start;
        }

        .related-list .card-item:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-2px);
            border-color: rgba(46, 107, 158, 0.25);
        }

        .card-thumb {
            flex-shrink: 0;
            width: 96px;
            height: 70px;
            border-radius: var(--radius-sm);
            overflow: hidden;
            background: var(--primary-light);
        }

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

        .card-info {
            flex: 1;
            min-width: 0;
        }

        .card-info h3 {
            font-size: 16px;
            font-weight: 600;
            color: var(--text);
            line-height: 1.4;
            margin-bottom: 6px;
        }

        .card-info h3 a {
            color: var(--text);
        }

        .card-info h3 a:hover {
            color: var(--primary);
            text-decoration: none;
        }

        .card-info p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 8px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }

        .card-meta {
            display: flex;
            align-items: center;
            gap: 14px;
            font-size: 13px;
            color: var(--text-muted);
        }

        .card-meta .post-date {
            display: inline-flex;
            align-items: center;
            gap: 4px;
        }

        .card-meta .tag-label {
            background: var(--accent-light);
            color: var(--accent-dark);
            padding: 2px 10px;
            border-radius: 999px;
            font-size: 12px;
            font-weight: 500;
        }

        .read-link {
            margin-left: auto;
            font-size: 13px;
            font-weight: 500;
            color: var(--primary);
        }

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

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

        .cta-card {
            background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
            border-radius: var(--radius-lg);
            padding: 52px 48px;
            text-align: center;
            color: #fff;
            position: relative;
            overflow: hidden;
        }

        .cta-card::before {
            content: "";
            position: absolute;
            top: -60px;
            right: -60px;
            width: 200px;
            height: 200px;
            background: rgba(255, 255, 255, 0.06);
            border-radius: 50%;
        }

        .cta-card::after {
            content: "";
            position: absolute;
            bottom: -30px;
            left: 40px;
            width: 90px;
            height: 90px;
            background: rgba(201, 160, 99, 0.25);
            border-radius: 50%;
        }

        .cta-card h2 {
            font-size: 28px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
            position: relative;
            z-index: 1;
        }

        .cta-card p {
            font-size: 16px;
            line-height: 1.7;
            color: rgba(255, 255, 255, 0.85);
            max-width: 480px;
            margin: 0 auto 28px;
            position: relative;
            z-index: 1;
        }

        .cta-actions {
            display: flex;
            gap: 14px;
            justify-content: center;
            align-items: center;
            flex-wrap: wrap;
            position: relative;
            z-index: 1;
        }

        .cta-link {
            color: rgba(255, 255, 255, 0.85);
            font-size: 14px;
            font-weight: 500;
            border-bottom: 1px solid rgba(255, 255, 255, 0.4);
            padding-bottom: 2px;
        }

        .cta-link:hover {
            color: #fff;
            border-color: #fff;
            text-decoration: none;
        }

        /* ====== Footer ====== */
        .site-footer {
            background: var(--footer-bg);
            color: var(--footer-text);
            padding: 64px 0 0;
            font-size: 14px;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.4fr;
            gap: 40px;
            padding-bottom: 48px;
        }

        .footer-logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
        }

        .footer-logo .logo-dot {
            background: var(--accent);
        }

        .footer-brand p {
            color: var(--footer-text);
            font-size: 14px;
            line-height: 1.7;
            max-width: 320px;
        }

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

        .footer-col ul {
            list-style: none;
        }

        .footer-col ul li {
            margin-bottom: 12px;
        }

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

        .footer-col ul a:hover {
            color: #fff;
            text-decoration: none;
            padding-left: 4px;
        }

        .footer-contact p {
            margin-bottom: 8px;
            color: var(--footer-text);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding: 20px 0 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            flex-wrap: wrap;
            font-size: 13px;
            color: rgba(167, 177, 188, 0.7);
        }

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

            .header-inner {
                gap: 14px;
            }

            .main-nav {
                gap: 20px;
            }

            .lang-switch {
                padding: 6px 12px;
                font-size: 12px;
            }
        }

        @media (max-width: 768px) {
            .container {
                padding: 0 16px;
            }

            .header-inner {
                height: 62px;
                padding: 0 16px;
            }

            .logo {
                font-size: 17px;
            }

            .logo-sub {
                display: none;
            }

            .main-nav {
                position: fixed;
                top: 62px;
                left: 0;
                right: 0;
                background: #fff;
                flex-direction: column;
                align-items: stretch;
                gap: 0;
                padding: 12px 20px 20px;
                border-bottom: 1px solid var(--border);
                box-shadow: 0 10px 30px rgba(30, 64, 95, 0.08);
                transform: translateY(-110%);
                opacity: 0;
                visibility: hidden;
                transition: var(--transition);
                z-index: 99;
                overflow-y: auto;
                max-height: calc(100vh - 62px);
            }

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

            .main-nav>a {
                padding: 14px 0;
                font-size: 16px;
                border-bottom: 1px solid var(--bg);
                text-align: center;
            }

            .main-nav>a.active::after {
                display: none;
            }

            .main-nav>a.active {
                background: var(--primary-light);
                border-radius: var(--radius-sm);
                color: var(--primary);
                font-weight: 700;
            }

            .mobile-actions {
                display: flex;
                flex-direction: column;
                gap: 12px;
                padding-top: 16px;
            }

            .header-actions .lang-switch {
                display: none;
            }

            .burger {
                display: flex;
            }

            .breadcrumb-wrap {
                padding: 10px 0;
            }

            .breadcrumb .current {
                max-width: 200px;
            }

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

            .article-card {
                margin-bottom: 32px;
            }

            .article-head h1 {
                font-size: 26px;
            }

            .article-meta {
                gap: 6px 14px;
                font-size: 13px;
            }

            .article-cover {
                margin-top: 20px;
            }

            .card-thumb {
                width: 72px;
                height: 56px;
            }

            .card-info h3 {
                font-size: 15px;
            }

            .card-info p {
                font-size: 13px;
            }

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

            .cta-card {
                padding: 36px 24px;
            }

            .cta-card h2 {
                font-size: 22px;
            }

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

            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
                padding-bottom: 32px;
            }

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

        @media (max-width: 520px) {
            .logo-main {
                font-size: 15px;
            }

            .logo .logo-sub {
                display: none;
            }

            .article-card {
                padding: 28px 20px 32px;
            }

            .article-head h1 {
                font-size: 22px;
            }

            .article-content {
                font-size: 15px;
            }

            .section-head h2 {
                font-size: 20px;
            }

            .related-list .card-item {
                flex-direction: column;
                padding: 18px;
            }

            .card-thumb {
                width: 100%;
                height: 120px;
            }

            .card-meta {
                flex-wrap: wrap;
                gap: 8px;
            }

            .read-link {
                margin-left: 0;
            }

            .cta-card {
                padding: 28px 18px;
            }

            .btn {
                padding: 10px 18px;
                font-size: 14px;
            }
        }

        @media (min-width: 769px) {
            .main-nav {
                transform: none !important;
                opacity: 1 !important;
                visibility: visible !important;
                flex-direction: row;
                padding: 0;
            }

            .mobile-actions {
                display: none !important;
            }
        }

        /* Focus visible for accessibility */
        a:focus-visible,
        button:focus-visible {
            outline: 3px solid rgba(46, 107, 158, 0.4);
            outline-offset: 2px;
            border-radius: 4px;
        }

:root {
  --primary: #2E6B9E;
  --primary-dark: #24537D;
  --primary-light: #EDF3F8;
  --accent: #C9A063;
  --accent-light: #F5EEDD;
  --bg: #F5F8FA;
  --card: #FFFFFF;
  --border: #E2E8F0;
  --text: #1A2633;
  --text-secondary: #5A6B7B;
  --muted: #8D9AAA;
  --footer-bg: #1F2A36;
  --footer-text: #A7B1BC;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 20px rgba(30, 64, 95, 0.06);
  --shadow-hover: 0 8px 28px rgba(30, 64, 95, 0.10);
  --transition: all .25s ease;
  --container-w: 1200px;
  --reading-w: 920px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-dark); text-decoration: underline; }
.container { max-width: var(--container-w); margin: 0 auto; padding: 0 24px; }
.reading { max-width: var(--reading-w); margin: 0 auto; padding: 0 24px; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.header-inner {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 24px;
  height: 72px;
  display: flex;
  align-items: center;
  gap: 24px;
}
.logo { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 20px; color: var(--text); white-space: nowrap; }
.logo:hover { text-decoration: none; }
.logo-dot { width: 10px; height: 10px; background: var(--primary); border-radius: 50%; flex-shrink: 0; }
.logo-main { color: var(--primary); }
.logo-sub { font-size: 12px; color: var(--muted); font-weight: 400; }
.main-nav { display: flex; align-items: center; gap: 28px; margin-left: auto; }
.main-nav > a { color: var(--text-secondary); font-size: 15px; font-weight: 500; padding: 8px 0; border-bottom: 2px solid transparent; white-space: nowrap; }
.main-nav > a:hover { color: var(--primary); text-decoration: none; }
.main-nav > a.active { color: var(--primary); border-bottom-color: var(--primary); }
.header-actions { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.mobile-actions { display: none; }
.lang-switch {
  position: relative; display: flex; align-items: center; gap: 6px;
  padding: 6px 14px; border: 1px solid var(--border); border-radius: 999px;
  font-size: 13px; color: var(--text-secondary); cursor: pointer; background: #fff;
  transition: var(--transition);
}
.lang-switch:hover { border-color: var(--primary); color: var(--primary); }
.lang-dropdown {
  display: none; position: absolute; top: calc(100% + 6px); right: 0;
  background: #fff; border: 1px solid var(--border); border-radius: 8px;
  box-shadow: 0 8px 24px rgba(30, 64, 95, 0.08); min-width: 130px;
  padding: 6px; z-index: 10;
}
.lang-switch:hover .lang-dropdown { display: block; }
.lang-dropdown a { display: block; padding: 8px 12px; font-size: 13px; color: var(--text-secondary); border-radius: 6px; }
.lang-dropdown a:hover { background: var(--primary-light); color: var(--primary); text-decoration: none; }
.caret { font-size: 10px; opacity: 0.7; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-size: 15px; font-weight: 600; padding: 11px 24px; border-radius: var(--radius-sm);
  border: 1px solid transparent; cursor: pointer; text-decoration: none !important;
  transition: var(--transition); line-height: 1.4; white-space: nowrap;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-1px); box-shadow: 0 6px 18px rgba(46, 107, 158, 0.25); }
.btn-outline { background: #fff; color: var(--primary); border-color: var(--primary); }
.btn-outline:hover { background: var(--primary-light); }
.btn-white { background: #fff; color: var(--primary); }
.btn-white:hover { background: #F0F4F8; transform: translateY(-1px); box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12); }
.btn-block { width: 100%; }
.burger { display: none; background: none; border: none; padding: 8px; cursor: pointer; }
.burger span { display: block; width: 22px; height: 2px; background: var(--text); margin: 4px 0; border-radius: 2px; transition: var(--transition); }

/* Hero */
.category-hero {
  background:
    linear-gradient(135deg, rgba(237, 243, 248, 0.94), rgba(255, 255, 255, 0.98)),
    url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;
  padding: 72px 0 64px;
  border-bottom: 1px solid var(--border);
}
.hero-inner {
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 24px;
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  gap: 56px;
  align-items: center;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--accent-light); color: #8a6a35;
  font-size: 13px; font-weight: 600;
  padding: 6px 14px; border-radius: 999px;
  margin-bottom: 18px; border: 1px solid rgba(201, 160, 99, 0.25);
}
.hero-badge .dot { width: 6px; height: 6px; background: var(--accent); border-radius: 50%; }
.hero-title { font-size: 36px; font-weight: 800; line-height: 1.3; margin-bottom: 18px; color: var(--text); }
.hero-title em { color: var(--primary); font-style: normal; }
.hero-desc { font-size: 16px; color: var(--text-secondary); line-height: 1.9; margin-bottom: 28px; max-width: 540px; }
.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.hero-meta {
  display: flex; gap: 18px; flex-wrap: wrap; margin-top: 28px;
  padding-top: 20px; border-top: 1px solid var(--border);
}
.hero-meta span { font-size: 13px; color: var(--muted); display: inline-flex; align-items: center; gap: 6px; }
.hero-media { position: relative; }
.hero-media img { width: 100%; height: 380px; object-fit: cover; border-radius: var(--radius); box-shadow: 0 12px 32px rgba(30, 64, 95, 0.12); border: 1px solid var(--border); }
.hero-media::after {
  content: ''; position: absolute; inset: 0; border-radius: var(--radius);
  background: linear-gradient(180deg, transparent 55%, rgba(26, 38, 51, 0.28)); pointer-events: none;
}
.hero-media-caption {
  position: absolute; left: 20px; bottom: 18px; color: #fff;
  font-size: 14px; font-weight: 600; z-index: 2; text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

/* Section base */
.section { padding: 80px 0; }
.section-head { margin-bottom: 44px; }
.section-tag {
  display: inline-block; font-size: 13px; font-weight: 600; color: var(--primary);
  background: var(--primary-light); padding: 4px 14px; border-radius: 999px; margin-bottom: 12px;
  letter-spacing: 0.5px;
}
.section-title { font-size: 30px; font-weight: 700; line-height: 1.35; color: var(--text); margin-bottom: 12px; }
.section-title em { color: var(--primary); font-style: normal; }
.section-desc { font-size: 16px; color: var(--text-secondary); line-height: 1.8; max-width: 700px; }
.section-desc.center { margin-left: auto; margin-right: auto; text-align: center; }
.section-head.center { text-align: center; }
.section-head.center .section-desc { margin-left: auto; margin-right: auto; }

/* Breadcrumb */
.breadcrumb {
  background: #fff; border-bottom: 1px solid var(--border);
  padding: 12px 0; font-size: 13px; color: var(--muted);
}
.breadcrumb .container { display: flex; flex-wrap: wrap; gap: 6px; align-items: center; }
.breadcrumb a { color: var(--primary); }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb .current { color: var(--text-secondary); }

/* Intro / 服务范围 */
.intro-wrap {
  display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center;
}
.intro-text .section-title { font-size: 28px; }
.points-list { list-style: none; margin-top: 20px; }
.points-list li {
  position: relative; padding-left: 26px; margin-bottom: 14px;
  color: var(--text-secondary); font-size: 15px; line-height: 1.75;
}
.points-list li::before {
  content: ''; position: absolute; left: 0; top: 12px;
  width: 8px; height: 8px; background: var(--primary); border-radius: 2px;
}
.points-list li strong { color: var(--text); font-weight: 600; }
.intro-media img { width: 100%; height: 320px; object-fit: cover; border-radius: var(--radius); border: 1px solid var(--border); box-shadow: var(--shadow); }

/* Topic cards */
.topic-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.topic-card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow); overflow: hidden; transition: var(--transition);
}
.topic-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-hover); }
.topic-card img { width: 100%; height: 190px; object-fit: cover; }
.topic-card-body { padding: 26px; }
.topic-card-body .card-no {
  display: inline-flex; align-items: center; justify-content: center;
  width: 30px; height: 30px; background: var(--primary-light); color: var(--primary);
  font-size: 14px; font-weight: 700; border-radius: 8px; margin-bottom: 14px;
}
.topic-card-body h3 { font-size: 19px; font-weight: 700; color: var(--text); margin-bottom: 10px; line-height: 1.4; }
.topic-card-body p { font-size: 14px; color: var(--text-secondary); line-height: 1.8; margin-bottom: 16px; }
.card-link { font-size: 14px; font-weight: 600; color: var(--primary); display: inline-flex; align-items: center; gap: 6px; }
.card-link:hover { text-decoration: none; color: var(--primary-dark); }
.card-link .arrow { transition: transform .2s; }
.card-link:hover .arrow { transform: translateX(4px); }

/* Process */
.process-section { background: var(--primary-light); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.process-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.process-step {
  background: #fff; border: 1px solid var(--border); border-radius: var(--radius);
  padding: 28px 22px; position: relative; box-shadow: var(--shadow);
}
.process-step .step-num {
  width: 36px; height: 36px; background: var(--primary); color: #fff;
  font-size: 16px; font-weight: 700; border-radius: 50%;
  display: flex; align-items: center; justify-content: center; margin-bottom: 16px;
}
.process-step h3 { font-size: 17px; font-weight: 700; margin-bottom: 8px; color: var(--text); }
.process-step p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; margin: 0; }

/* Scenarios */
.scenario-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.scenario-card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 30px; box-shadow: var(--shadow); transition: var(--transition);
}
.scenario-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-2px); }
.scenario-icon {
  width: 48px; height: 48px; background: var(--accent-light); border-radius: 12px;
  display: flex; align-items: center; justify-content: center; font-size: 22px; margin-bottom: 16px;
}
.scenario-card h3 { font-size: 18px; font-weight: 700; margin-bottom: 10px; }
.scenario-card p { font-size: 14px; color: var(--text-secondary); line-height: 1.75; margin: 0; }

/* Stats bar */
.stats-bar {
  background: var(--primary); border-radius: var(--radius);
  padding: 36px 48px; display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 32px; color: #fff; box-shadow: 0 8px 28px rgba(46, 107, 158, 0.2);
}
.stat-item { text-align: center; }
.stat-num { font-size: 34px; font-weight: 800; line-height: 1.2; }
.stat-label { font-size: 13px; opacity: 0.85; margin-top: 6px; }
.stats-divider { width: 1px; background: rgba(255, 255, 255, 0.2); }

/* FAQ */
.faq-list { max-width: var(--reading-w); margin: 0 auto; }
.faq-item {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius-sm);
  margin-bottom: 14px; overflow: hidden; transition: var(--transition);
}
.faq-item:hover { border-color: #C9D6E2; }
.faq-question {
  display: flex; align-items: center; gap: 14px; padding: 20px 24px;
  cursor: pointer; font-size: 16px; font-weight: 600; color: var(--text); user-select: none;
}
.faq-item .q-icon {
  flex-shrink: 0; width: 26px; height: 26px; background: var(--primary-light);
  color: var(--primary); font-size: 14px; font-weight: 700; border-radius: 6px;
  display: flex; align-items: center; justify-content: center;
}
.faq-toggle { margin-left: auto; font-size: 20px; color: var(--muted); transition: transform .25s; flex-shrink: 0; }
.faq-item.open .faq-toggle { transform: rotate(45deg); color: var(--primary); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height .3s ease; }
.faq-answer-inner { padding: 0 24px 22px 64px; font-size: 14px; color: var(--text-secondary); line-height: 1.85; }

/* CTA */
.cta-section { padding: 72px 0 96px; }
.cta-box {
  background:
    linear-gradient(135deg, rgba(36, 83, 125, 0.97), rgba(46, 107, 158, 0.96)),
    url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;
  border-radius: 16px; padding: 60px 56px; color: #fff;
  box-shadow: 0 14px 40px rgba(30, 64, 95, 0.22);
  position: relative; overflow: hidden;
}
.cta-box::after {
  content: ''; position: absolute; right: -30px; bottom: -30px;
  width: 160px; height: 160px; background: rgba(201, 160, 99, 0.18); border-radius: 50%;
}
.cta-inner { max-width: 720px; position: relative; z-index: 2; }
.cta-title { font-size: 30px; font-weight: 800; margin-bottom: 14px; line-height: 1.35; }
.cta-text { font-size: 16px; color: rgba(255, 255, 255, 0.85); margin-bottom: 28px; line-height: 1.8; }
.cta-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.cta-note { margin-top: 18px; font-size: 13px; color: rgba(255, 255, 255, 0.6); }
.cta-note a { color: #fff; text-decoration: underline; }

/* Footer */
.site-footer { background: var(--footer-bg); color: var(--footer-text); padding: 64px 0 0; }
.footer-grid {
  max-width: var(--container-w); margin: 0 auto; padding: 0 24px;
  display: grid; grid-template-columns: 1.4fr 0.8fr 1fr 1fr; gap: 48px;
  padding-bottom: 48px;
}
.footer-logo {
  display: flex; align-items: center; gap: 8px;
  font-size: 18px; font-weight: 700; color: #fff; margin-bottom: 14px;
}
.footer-brand p { font-size: 14px; line-height: 1.8; color: var(--footer-text); margin: 0; }
.footer-col h4 { font-size: 15px; font-weight: 600; color: #fff; margin-bottom: 14px; }
.footer-col ul { list-style: none; }
.footer-col ul li { margin-bottom: 10px; }
.footer-col ul a { color: var(--footer-text); font-size: 14px; }
.footer-col ul a:hover { color: #fff; text-decoration: none; }
.footer-contact p { font-size: 14px; margin-bottom: 6px; color: var(--footer-text); line-height: 1.7; }
.footer-bottom {
  max-width: var(--container-w); margin: 0 auto; padding: 20px 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px;
  font-size: 13px; color: rgba(255, 255, 255, 0.45);
}
.footer-bottom .logo-dot { background: var(--accent); }

/* Responsive */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 36px; }
  .hero-media img { height: 320px; }
  .topic-grid { grid-template-columns: repeat(2, 1fr); }
  .scenario-grid { grid-template-columns: repeat(2, 1fr); }
  .process-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-bar { grid-template-columns: repeat(2, 1fr); }
  .stats-divider { display: none; }
  .intro-wrap { grid-template-columns: 1fr; gap: 32px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .header-inner { height: 64px; padding: 0 16px; }
  .main-nav {
    position: fixed; top: 64px; left: 0; right: 0;
    background: #fff; border-bottom: 1px solid var(--border);
    flex-direction: column; align-items: stretch; gap: 0;
    padding: 12px 20px 20px;
    display: none; box-shadow: 0 12px 24px rgba(30, 64, 95, 0.08);
    max-height: calc(100vh - 64px); overflow-y: auto;
  }
  .main-nav.open { display: flex; }
  .main-nav > a { padding: 12px 0; border-bottom: 1px solid var(--border); border-bottom-color: var(--border); font-size: 16px; }
  .main-nav > a.active { border-bottom-color: var(--primary); }
  .header-actions .lang-switch { display: none; }
  .burger { display: block; }
  .mobile-actions { display: flex; flex-direction: column; gap: 12px; padding-top: 16px; }
  .mobile-actions .lang-switch {
    display: flex; width: 100%; justify-content: center;
  }
  .hero-title { font-size: 28px; }
  .category-hero { padding: 48px 0 40px; }
  .section { padding: 56px 0; }
  .section-title { font-size: 26px; }
  .topic-grid { grid-template-columns: 1fr; }
  .scenario-grid { grid-template-columns: 1fr; }
  .process-grid { grid-template-columns: 1fr; }
  .stats-bar { grid-template-columns: 1fr 1fr; padding: 28px 24px; gap: 24px; }
  .cta-box { padding: 40px 28px; }
  .cta-title { font-size: 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; padding: 20px 16px; }
  .hero-actions .btn { flex: 1; justify-content: center; }
}
@media (max-width: 520px) {
  .container, .reading, .header-inner, .hero-inner, .footer-grid { padding-left: 16px; padding-right: 16px; }
  .hero-title { font-size: 24px; }
  .hero-desc { font-size: 15px; }
  .stats-bar { grid-template-columns: 1fr; }
  .btn { padding: 10px 18px; font-size: 14px; }
  .topic-card-body { padding: 20px; }
  .faq-answer-inner { padding-left: 20px; padding-right: 20px; }
  .faq-question { padding: 16px 18px; font-size: 15px; gap: 10px; }
  .cta-box { padding: 36px 22px; }
}

/* Focus */
.btn:focus-visible, a:focus-visible, .burger:focus-visible {
  outline: 3px solid rgba(46, 107, 158, 0.4); outline-offset: 2px;
}