/* roulang page: index */
:root {
  --primary: #1a365d;
  --primary-light: #2b4f8e;
  --secondary: #2b6cb0;
  --accent: #d4a030;
  --accent-light: #e8b84a;
  --bg: #ffffff;
  --bg-alt: #f7f9fc;
  --bg-dark: #0f1a2e;
  --text: #1a202c;
  --text-light: #4a5568;
  --text-muted: #718096;
  --border: #e2e8f0;
  --border-light: #f0f2f5;
  --radius: 10px;
  --radius-sm: 6px;
  --radius-lg: 16px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.08);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.1);
  --transition: 0.25s ease;
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
  --container: 1200px;
  --nav-height: 72px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body { font-family: var(--font-sans); color: var(--text); background: var(--bg); line-height: 1.6; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }
a { color: var(--secondary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--primary-light); }
img { max-width: 100%; height: auto; display: block; }
button, input, textarea { font-family: inherit; font-size: inherit; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 600; color: var(--text); }
.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
@media (max-width: 768px) { .container { padding: 0 16px; } }

/* Header & Navigation */
.site-header { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; background: rgba(255,255,255,0.96); backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px); border-bottom: 1px solid var(--border-light); height: var(--nav-height); transition: box-shadow var(--transition); }
.site-header.scrolled { box-shadow: var(--shadow); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: var(--nav-height); max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.site-logo { font-size: 1.35rem; font-weight: 700; color: var(--primary); letter-spacing: -0.01em; display: flex; align-items: center; gap: 8px; }
.site-logo:hover { color: var(--primary); opacity: 0.85; }
.site-logo i { color: var(--accent); font-size: 1.5rem; }
.main-nav { display: flex; align-items: center; gap: 32px; }
.main-nav a { font-size: 0.95rem; font-weight: 500; color: var(--text-light); padding: 6px 0; position: relative; transition: color var(--transition); }
.main-nav a::after { content: ''; position: absolute; bottom: -2px; left: 0; width: 0; height: 2px; background: var(--accent); transition: width var(--transition); border-radius: 2px; }
.main-nav a:hover { color: var(--primary); }
.main-nav a:hover::after { width: 100%; }
.main-nav a.active { color: var(--primary); }
.main-nav a.active::after { width: 100%; background: var(--accent); }
.nav-cta { display: inline-flex; align-items: center; gap: 8px; background: var(--primary); color: #fff !important; padding: 8px 20px !important; border-radius: 30px; font-weight: 500; font-size: 0.9rem; transition: background var(--transition), transform var(--transition); }
.nav-cta:hover { background: var(--primary-light) !important; transform: translateY(-1px); }
.nav-cta::after { display: none !important; }
.mobile-toggle { display: none; background: none; border: none; font-size: 1.5rem; color: var(--primary); cursor: pointer; padding: 4px; }
@media (max-width: 768px) {
  .main-nav { position: fixed; top: var(--nav-height); left: 0; right: 0; background: rgba(255,255,255,0.98); backdrop-filter: blur(12px); flex-direction: column; padding: 24px 32px; gap: 20px; border-bottom: 1px solid var(--border); transform: translateY(-110%); opacity: 0; pointer-events: none; transition: all 0.35s ease; box-shadow: var(--shadow-md); }
  .main-nav.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .main-nav a { font-size: 1.05rem; padding: 4px 0; }
  .mobile-toggle { display: block; }
  .nav-cta { width: fit-content; }
}

/* Hero */
.hero { padding: 140px 0 80px; position: relative; background: var(--bg-dark); min-height: 560px; display: flex; align-items: center; overflow: hidden; }
.hero-bg { position: absolute; inset: 0; background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat; opacity: 0.35; transform: scale(1.02); }
.hero-overlay { position: absolute; inset: 0; background: linear-gradient(135deg, rgba(15,26,46,0.85) 0%, rgba(26,54,93,0.7) 60%, rgba(43,108,176,0.3) 100%); }
.hero .container { position: relative; z-index: 2; text-align: center; }
.hero h1 { font-size: 2.8rem; font-weight: 700; color: #fff; margin-bottom: 20px; letter-spacing: -0.02em; line-height: 1.2; }
.hero h1 span { color: var(--accent); }
.hero-sub { font-size: 1.2rem; color: rgba(255,255,255,0.8); max-width: 720px; margin: 0 auto 32px; line-height: 1.7; }
.hero-actions { display: flex; justify-content: center; gap: 16px; flex-wrap: wrap; }
.btn { display: inline-flex; align-items: center; gap: 10px; padding: 14px 32px; border-radius: 30px; font-weight: 600; font-size: 1rem; border: none; cursor: pointer; transition: all var(--transition); text-decoration: none; }
.btn-primary { background: var(--accent); color: #1a202c; box-shadow: 0 4px 14px rgba(212,160,48,0.35); }
.btn-primary:hover { background: var(--accent-light); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(212,160,48,0.4); color: #1a202c; }
.btn-outline { background: transparent; color: #fff; border: 2px solid rgba(255,255,255,0.5); }
.btn-outline:hover { border-color: #fff; background: rgba(255,255,255,0.1); transform: translateY(-2px); color: #fff; }
.hero-stats { display: flex; justify-content: center; gap: 48px; margin-top: 48px; flex-wrap: wrap; }
.hero-stat { text-align: center; color: rgba(255,255,255,0.9); }
.hero-stat-num { font-size: 2rem; font-weight: 700; color: #fff; display: block; }
.hero-stat-label { font-size: 0.85rem; color: rgba(255,255,255,0.65); margin-top: 4px; }
@media (max-width: 768px) {
  .hero { padding: 110px 0 60px; min-height: auto; }
  .hero h1 { font-size: 1.9rem; }
  .hero-sub { font-size: 1rem; }
  .hero-stats { gap: 24px; }
  .hero-stat-num { font-size: 1.5rem; }
}

/* Section common */
.section { padding: 80px 0; }
.section-alt { background: var(--bg-alt); }
.section-dark { background: var(--bg-dark); color: #fff; }
.section-title { font-size: 2rem; font-weight: 700; text-align: center; margin-bottom: 12px; color: var(--text); letter-spacing: -0.01em; }
.section-subtitle { text-align: center; color: var(--text-muted); max-width: 620px; margin: 0 auto 48px; font-size: 1.05rem; line-height: 1.7; }
.section-dark .section-title { color: #fff; }
.section-dark .section-subtitle { color: rgba(255,255,255,0.65); }
@media (max-width: 768px) { .section { padding: 56px 0; } .section-title { font-size: 1.6rem; } }

/* Advantages */
.adv-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.adv-card { background: var(--bg); border-radius: var(--radius-lg); padding: 36px 28px; box-shadow: var(--shadow); border: 1px solid var(--border-light); transition: all var(--transition); text-align: center; }
.adv-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); border-color: var(--border); }
.adv-icon { width: 60px; height: 60px; border-radius: 50%; background: var(--bg-alt); display: flex; align-items: center; justify-content: center; margin: 0 auto 20px; font-size: 1.6rem; color: var(--accent); }
.adv-card h3 { font-size: 1.25rem; margin-bottom: 10px; }
.adv-card p { color: var(--text-light); font-size: 0.95rem; line-height: 1.7; }
@media (max-width: 900px) { .adv-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .adv-grid { grid-template-columns: 1fr; } }

/* Features */
.features-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 40px; align-items: center; }
.feature-image { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-md); }
.feature-image img { width: 100%; height: auto; display: block; }
.feature-list { display: flex; flex-direction: column; gap: 24px; }
.feature-item { display: flex; gap: 16px; align-items: flex-start; }
.feature-item-icon { flex-shrink: 0; width: 40px; height: 40px; border-radius: 50%; background: var(--bg-alt); display: flex; align-items: center; justify-content: center; color: var(--accent); font-size: 1rem; }
.feature-item h4 { font-size: 1.05rem; margin-bottom: 4px; }
.feature-item p { color: var(--text-light); font-size: 0.92rem; line-height: 1.6; }
@media (max-width: 768px) { .features-grid { grid-template-columns: 1fr; } .feature-image { order: -1; } }

/* Process */
.process-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; position: relative; }
.process-step { text-align: center; padding: 28px 16px; background: var(--bg); border-radius: var(--radius-lg); box-shadow: var(--shadow); border: 1px solid var(--border-light); position: relative; }
.process-step .step-num { width: 44px; height: 44px; border-radius: 50%; background: var(--primary); color: #fff; display: flex; align-items: center; justify-content: center; margin: 0 auto 16px; font-weight: 700; font-size: 1.1rem; }
.process-step h4 { font-size: 1.05rem; margin-bottom: 6px; }
.process-step p { color: var(--text-light); font-size: 0.88rem; line-height: 1.6; }
.process-connector { display: none; }
@media (max-width: 900px) { .process-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 500px) { .process-grid { grid-template-columns: 1fr; } }

/* CMS List */
.cms-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.cms-card { background: var(--bg); border-radius: var(--radius-lg); box-shadow: var(--shadow); border: 1px solid var(--border-light); overflow: hidden; transition: all var(--transition); display: flex; flex-direction: column; }
.cms-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.cms-card-img { height: 180px; background: var(--bg-alt); display: flex; align-items: center; justify-content: center; color: var(--text-muted); font-size: 0.9rem; overflow: hidden; }
.cms-card-img img { width: 100%; height: 100%; object-fit: cover; }
.cms-card-body { padding: 20px 22px 24px; flex: 1; display: flex; flex-direction: column; }
.cms-card-meta { display: flex; align-items: center; gap: 12px; font-size: 0.82rem; color: var(--text-muted); margin-bottom: 8px; }
.cms-card-meta .tag { display: inline-block; background: var(--bg-alt); padding: 2px 12px; border-radius: 12px; font-size: 0.78rem; color: var(--text-light); }
.cms-card h3 { font-size: 1.05rem; font-weight: 600; margin-bottom: 8px; line-height: 1.4; }
.cms-card h3 a { color: var(--text); }
.cms-card h3 a:hover { color: var(--secondary); }
.cms-card p { color: var(--text-light); font-size: 0.9rem; line-height: 1.6; flex: 1; }
.cms-empty { grid-column: 1 / -1; text-align: center; padding: 48px 20px; color: var(--text-muted); background: var(--bg-alt); border-radius: var(--radius-lg); font-size: 1rem; }
@media (max-width: 900px) { .cms-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .cms-grid { grid-template-columns: 1fr; } }

/* Testimonials / Trust */
.trust-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 32px; }
.trust-card { background: rgba(255,255,255,0.06); border: 1px solid rgba(255,255,255,0.1); border-radius: var(--radius-lg); padding: 32px 28px; text-align: center; backdrop-filter: blur(8px); }
.trust-card i { font-size: 2rem; color: var(--accent); margin-bottom: 16px; }
.trust-card .num { font-size: 2.2rem; font-weight: 700; color: #fff; display: block; margin-bottom: 4px; }
.trust-card .label { color: rgba(255,255,255,0.65); font-size: 0.9rem; }
@media (max-width: 768px) { .trust-grid { grid-template-columns: repeat(2, 1fr); gap: 20px; } }
@media (max-width: 480px) { .trust-grid { grid-template-columns: 1fr; } }

/* FAQ */
.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.faq-item { border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; transition: border-color var(--transition); }
.faq-item.open { border-color: var(--secondary); }
.faq-question { width: 100%; background: none; border: none; padding: 18px 24px; font-size: 1rem; font-weight: 500; color: var(--text); text-align: left; cursor: pointer; display: flex; justify-content: space-between; align-items: center; gap: 12px; transition: background var(--transition); }
.faq-question:hover { background: var(--bg-alt); }
.faq-question i { transition: transform var(--transition); color: var(--text-muted); font-size: 0.9rem; }
.faq-item.open .faq-question i { transform: rotate(180deg); color: var(--secondary); }
.faq-answer { padding: 0 24px; max-height: 0; overflow: hidden; transition: all 0.35s ease; color: var(--text-light); font-size: 0.95rem; line-height: 1.7; }
.faq-item.open .faq-answer { padding: 0 24px 20px; max-height: 300px; }

/* CTA */
.cta-section { background: linear-gradient(135deg, var(--primary) 0%, var(--bg-dark) 100%); position: relative; overflow: hidden; }
.cta-section::before { content: ''; position: absolute; inset: 0; background: url('/assets/images/backpic/back-2.webp') center center / cover no-repeat; opacity: 0.1; }
.cta-content { position: relative; z-index: 2; text-align: center; padding: 64px 20px; }
.cta-content h2 { font-size: 2rem; font-weight: 700; color: #fff; margin-bottom: 16px; }
.cta-content p { color: rgba(255,255,255,0.7); max-width: 600px; margin: 0 auto 32px; font-size: 1.05rem; line-height: 1.7; }
.cta-content .btn-primary { font-size: 1.05rem; padding: 16px 40px; }
@media (max-width: 768px) { .cta-content h2 { font-size: 1.6rem; } }

/* Footer */
.site-footer { background: var(--bg-dark); color: rgba(255,255,255,0.7); padding: 48px 0 32px; }
.footer-inner { display: flex; justify-content: space-between; align-items: flex-start; flex-wrap: wrap; gap: 32px; }
.footer-brand { max-width: 320px; }
.footer-brand .site-logo { color: #fff; font-size: 1.2rem; margin-bottom: 12px; }
.footer-brand .site-logo i { color: var(--accent); }
.footer-brand p { font-size: 0.9rem; line-height: 1.7; color: rgba(255,255,255,0.55); }
.footer-links { display: flex; gap: 48px; flex-wrap: wrap; }
.footer-links-col h4 { color: #fff; font-size: 0.95rem; margin-bottom: 12px; font-weight: 600; }
.footer-links-col a { display: block; color: rgba(255,255,255,0.55); font-size: 0.88rem; padding: 4px 0; transition: color var(--transition); }
.footer-links-col a:hover { color: #fff; }
.footer-bottom { margin-top: 40px; padding-top: 24px; border-top: 1px solid rgba(255,255,255,0.08); text-align: center; font-size: 0.82rem; color: rgba(255,255,255,0.4); }
.footer-bottom a { color: rgba(255,255,255,0.5); }
.footer-bottom a:hover { color: #fff; }
@media (max-width: 600px) { .footer-inner { flex-direction: column; } .footer-links { gap: 24px; } }

/* Back to top */
.back-top { position: fixed; bottom: 30px; right: 30px; width: 48px; height: 48px; border-radius: 50%; background: var(--primary); color: #fff; border: none; font-size: 1.2rem; cursor: pointer; box-shadow: var(--shadow-md); opacity: 0; visibility: hidden; transform: translateY(12px); transition: all var(--transition); z-index: 999; }
.back-top.visible { opacity: 1; visibility: visible; transform: translateY(0); }
.back-top:hover { background: var(--primary-light); transform: translateY(-2px); }

/* Misc */
.text-accent { color: var(--accent); }
.text-center { text-align: center; }
.mt-12 { margin-top: 12px; }
.mt-24 { margin-top: 24px; }
.mb-12 { margin-bottom: 12px; }
.mb-24 { margin-bottom: 24px; }

/* roulang page: category1 */
:root {
  --primary: #1a2a4a;
  --primary-light: #2c4a7c;
  --primary-dark: #0f1a2e;
  --accent: #d4a843;
  --accent-hover: #c49a35;
  --accent-light: #f0e0b0;
  --bg: #f8f7f4;
  --bg-alt: #ffffff;
  --bg-card: #ffffff;
  --text: #1a1a2e;
  --text-light: #5a5a72;
  --text-lighter: #8a8aa0;
  --border: #e8e6e0;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 20px;
  --shadow: 0 4px 24px rgba(26, 42, 74, 0.06);
  --shadow-hover: 0 12px 40px rgba(26, 42, 74, 0.10);
  --transition: all 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --max-width: 1200px;
  --nav-height: 72px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: var(--transition); }
ul, ol { list-style: none; }
button, input, textarea { font-family: inherit; font-size: inherit; border: none; outline: none; }
h1, h2, h3, h4, h5, h6 { font-weight: 600; line-height: 1.3; color: var(--primary); }
h1 { font-size: 2.8rem; }
h2 { font-size: 2rem; margin-bottom: 0.5em; }
h3 { font-size: 1.3rem; }
p { margin-bottom: 1em; color: var(--text-light); }
.container { max-width: var(--max-width); margin: 0 auto; padding: 0 24px; }

/* ===== 导航 ===== */
.main-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--nav-height);
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}
.main-nav .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--max-width);
}
.site-logo {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--primary);
  letter-spacing: -0.3px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.site-logo i { color: var(--accent); font-size: 1.2rem; }
.main-nav .nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
}
.main-nav .nav-links a {
  font-size: 0.95rem;
  font-weight: 500;
  color: var(--text-light);
  padding: 6px 0;
  position: relative;
  transition: var(--transition);
}
.main-nav .nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--accent);
  transition: var(--transition);
  border-radius: 2px;
}
.main-nav .nav-links a:hover { color: var(--primary); }
.main-nav .nav-links a:hover::after { width: 100%; }
.main-nav .nav-links a.active {
  color: var(--primary);
  font-weight: 600;
}
.main-nav .nav-links a.active::after {
  width: 100%;
  background: var(--accent);
}
.nav-cta {
  background: var(--primary);
  color: #fff !important;
  padding: 8px 22px !important;
  border-radius: 50px;
  font-weight: 600 !important;
  font-size: 0.9rem !important;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: var(--transition);
}
.nav-cta i { font-size: 0.85rem; }
.nav-cta:hover { background: var(--primary-light) !important; transform: translateY(-1px); box-shadow: 0 6px 20px rgba(26,42,74,0.15); }
.nav-cta::after { display: none !important; }
.menu-toggle { display: none; font-size: 1.4rem; color: var(--primary); cursor: pointer; background: none; padding: 8px; }

/* ===== Hero Banner ===== */
.category-hero {
  padding: 140px 0 80px;
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 60%, var(--primary-light) 100%);
  position: relative;
  overflow: hidden;
  min-height: 420px;
  display: flex;
  align-items: center;
}
.category-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-1.webp') center center / cover no-repeat;
  opacity: 0.15;
  mix-blend-mode: overlay;
}
.category-hero .container { position: relative; z-index: 2; text-align: center; }
.category-hero h1 {
  color: #fff;
  font-size: 3rem;
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}
.category-hero h1 i { color: var(--accent); margin-right: 12px; }
.category-hero .hero-sub {
  color: rgba(255,255,255,0.8);
  font-size: 1.15rem;
  max-width: 680px;
  margin: 0 auto 32px;
  line-height: 1.8;
}
.category-hero .hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(212,168,67,0.18);
  color: var(--accent-light);
  padding: 6px 20px;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 500;
  margin-bottom: 20px;
  border: 1px solid rgba(212,168,67,0.25);
}

/* ===== 板块通用 ===== */
.section {
  padding: 80px 0;
}
.section-alt { background: var(--bg-alt); }
.section-title {
  text-align: center;
  margin-bottom: 56px;
}
.section-title h2 { margin-bottom: 12px; }
.section-title p {
  max-width: 600px;
  margin: 0 auto;
  color: var(--text-lighter);
  font-size: 1.05rem;
}
.section-title .title-accent {
  display: inline-block;
  width: 48px;
  height: 3px;
  background: var(--accent);
  border-radius: 4px;
  margin-bottom: 16px;
}

/* ===== 核心优势卡片 ===== */
.advantage-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.advantage-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 40px 32px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  transition: var(--transition);
  text-align: center;
}
.advantage-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: var(--accent-light);
}
.advantage-card .icon-wrap {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: rgba(212,168,67,0.10);
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  font-size: 1.6rem;
  color: var(--accent);
  transition: var(--transition);
}
.advantage-card:hover .icon-wrap { background: var(--accent); color: #fff; }
.advantage-card h3 { margin-bottom: 12px; }
.advantage-card p { font-size: 0.95rem; margin-bottom: 0; }

/* ===== 使用流程 ===== */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  counter-reset: step;
}
.step-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 36px 24px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  text-align: center;
  position: relative;
  transition: var(--transition);
}
.step-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.step-card .step-num {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-weight: 700;
  font-size: 1.2rem;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 18px;
  transition: var(--transition);
}
.step-card:hover .step-num { background: var(--accent); }
.step-card .step-icon { font-size: 1.8rem; color: var(--accent); margin-bottom: 14px; }
.step-card h3 { font-size: 1.1rem; margin-bottom: 10px; }
.step-card p { font-size: 0.9rem; margin-bottom: 0; color: var(--text-lighter); }

/* ===== 功能特色 ===== */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}
.feature-card {
  display: flex;
  gap: 24px;
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 32px 28px;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  transition: var(--transition);
  align-items: flex-start;
}
.feature-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: var(--accent-light); }
.feature-card .feature-img {
  width: 120px;
  height: 90px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  flex-shrink: 0;
  background: var(--border);
}
.feature-card .feature-body h3 { font-size: 1.1rem; margin-bottom: 8px; }
.feature-card .feature-body p { font-size: 0.92rem; margin-bottom: 0; color: var(--text-lighter); }
.feature-card .feature-tag {
  display: inline-block;
  background: rgba(212,168,67,0.12);
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 2px 12px;
  border-radius: 50px;
  margin-top: 10px;
}

/* ===== 应用场景 ===== */
.scene-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.scene-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  transition: var(--transition);
}
.scene-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.scene-card .scene-img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  background: var(--border);
}
.scene-card .scene-body { padding: 24px 20px 26px; }
.scene-card .scene-body h3 { font-size: 1.05rem; margin-bottom: 8px; }
.scene-card .scene-body p { font-size: 0.9rem; margin-bottom: 0; color: var(--text-lighter); }

/* ===== FAQ ===== */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.faq-item {
  background: var(--bg-card);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: var(--transition);
}
.faq-item:hover { border-color: var(--accent-light); }
.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  background: none;
  font-size: 1rem;
  font-weight: 500;
  color: var(--text);
  cursor: pointer;
  text-align: left;
  transition: var(--transition);
}
.faq-question i { color: var(--accent); font-size: 0.9rem; transition: var(--transition); }
.faq-question[aria-expanded="true"] i { transform: rotate(180deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
  padding: 0 24px;
  color: var(--text-light);
  font-size: 0.95rem;
  line-height: 1.7;
}
.faq-answer.open {
  max-height: 300px;
  padding: 0 24px 20px;
}

/* ===== CTA ===== */
.cta-section {
  padding: 72px 0;
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-2.webp') center center / cover no-repeat;
  opacity: 0.08;
  mix-blend-mode: overlay;
}
.cta-section .container { position: relative; z-index: 2; text-align: center; }
.cta-section h2 { color: #fff; font-size: 2.2rem; margin-bottom: 16px; }
.cta-section p { color: rgba(255,255,255,0.75); font-size: 1.1rem; max-width: 560px; margin: 0 auto 32px; }
.cta-btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--accent);
  color: var(--primary-dark);
  font-weight: 700;
  font-size: 1.05rem;
  padding: 14px 40px;
  border-radius: 50px;
  transition: var(--transition);
  box-shadow: 0 8px 28px rgba(212,168,67,0.25);
}
.cta-btn:hover { background: var(--accent-hover); transform: translateY(-3px); box-shadow: 0 12px 36px rgba(212,168,67,0.35); color: var(--primary-dark); }
.cta-btn i { font-size: 1rem; }

/* ===== 页脚 ===== */
.site-footer {
  background: var(--primary-dark);
  color: rgba(255,255,255,0.8);
  padding: 60px 0 0;
}
.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 48px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-brand .site-logo { color: #fff; font-size: 1.3rem; margin-bottom: 16px; }
.footer-brand .site-logo i { color: var(--accent); }
.footer-brand p { font-size: 0.9rem; color: rgba(255,255,255,0.6); max-width: 400px; line-height: 1.8; }
.footer-links { display: flex; gap: 48px; justify-content: flex-end; }
.footer-links-col h4 { color: #fff; font-size: 0.95rem; font-weight: 600; margin-bottom: 16px; }
.footer-links-col a {
  display: block;
  color: rgba(255,255,255,0.55);
  font-size: 0.9rem;
  padding: 4px 0;
  transition: var(--transition);
}
.footer-links-col a:hover { color: var(--accent); padding-left: 4px; }
.footer-bottom {
  padding: 20px 0;
  text-align: center;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.4);
}
.footer-bottom a { color: rgba(255,255,255,0.5); }
.footer-bottom a:hover { color: var(--accent); }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  h1 { font-size: 2.2rem; }
  h2 { font-size: 1.6rem; }
  .category-hero h1 { font-size: 2.4rem; }
  .advantage-grid { grid-template-columns: repeat(3, 1fr); gap: 20px; }
  .steps-grid { grid-template-columns: repeat(4, 1fr); gap: 16px; }
  .scene-grid { grid-template-columns: repeat(3, 1fr); gap: 18px; }
}
@media (max-width: 768px) {
  .container { padding: 0 20px; }
  .main-nav .nav-links { gap: 20px; }
  .main-nav .nav-links a { font-size: 0.85rem; }
  .category-hero { padding: 120px 0 60px; min-height: 340px; }
  .category-hero h1 { font-size: 1.8rem; }
  .category-hero .hero-sub { font-size: 1rem; }
  .section { padding: 56px 0; }
  .section-title { margin-bottom: 40px; }
  .advantage-grid { grid-template-columns: 1fr; max-width: 480px; margin: 0 auto; }
  .steps-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .feature-grid { grid-template-columns: 1fr; }
  .feature-card { flex-direction: column; }
  .feature-card .feature-img { width: 100%; height: 160px; }
  .scene-grid { grid-template-columns: 1fr; max-width: 480px; margin: 0 auto; }
  .footer-inner { grid-template-columns: 1fr; gap: 32px; }
  .footer-links { justify-content: flex-start; }
  .menu-toggle { display: block; }
  .main-nav .nav-links {
    position: absolute;
    top: var(--nav-height);
    left: 0;
    width: 100%;
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(12px);
    flex-direction: column;
    padding: 20px 24px;
    gap: 16px;
    border-bottom: 1px solid var(--border);
    display: none;
  }
  .main-nav .nav-links.open { display: flex; }
  .main-nav .nav-links a { font-size: 1rem; padding: 8px 0; }
  .nav-cta { align-self: flex-start; }
}
@media (max-width: 520px) {
  .category-hero h1 { font-size: 1.5rem; }
  .category-hero .hero-sub { font-size: 0.9rem; }
  .steps-grid { grid-template-columns: 1fr; max-width: 360px; margin: 0 auto; }
  .cta-section h2 { font-size: 1.5rem; }
  .cta-btn { padding: 12px 28px; font-size: 0.95rem; }
}

/* roulang page: article */
/* ===== 设计变量 ===== */
        :root {
            --primary: #1a2a4a;
            --primary-dark: #0f1a30;
            --primary-light: #2c4068;
            --accent: #c9a84c;
            --accent-light: #dfc06a;
            --accent-dark: #b89430;
            --bg: #f9f8f6;
            --bg-card: #ffffff;
            --bg-alt: #f0ede8;
            --text: #1e1e1e;
            --text-secondary: #6b7280;
            --text-light: #9ca3af;
            --border: #e5e7eb;
            --border-light: #f0f0f0;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.10);
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --transition: 0.25s cubic-bezier(0.4,0,0.2,1);
            --font-sans: "PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
            --max-width: 1200px;
            --content-width: 760px;
            --nav-height: 72px;
        }

        /* ===== Reset ===== */
        *,*::before,*::after { box-sizing: border-box; margin: 0; padding: 0; }
        html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
        body {
            font-family: var(--font-sans);
            color: var(--text);
            background: var(--bg);
            line-height: 1.7;
            font-size: 16px;
        }
        img { max-width: 100%; height: auto; display: block; }
        a { color: var(--primary); text-decoration: none; transition: color var(--transition); }
        a:hover { color: var(--accent); }
        a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 2px; }
        button { cursor: pointer; font-family: inherit; border: none; background: none; }
        button:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
        input,textarea { font-family: inherit; }
        ul,ol { list-style: none; }
        h1,h2,h3,h4,h5,h6 { line-height: 1.3; font-weight: 700; color: var(--primary); }

        /* ===== 容器 ===== */
        .container {
            max-width: var(--max-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        .content-container {
            max-width: var(--content-width);
            margin: 0 auto;
            padding: 0 24px;
        }
        @media (max-width: 640px) {
            .container, .content-container { padding: 0 16px; }
        }

        /* ===== 导航 ===== */
        .site-header {
            position: fixed;
            top: 0; left: 0; right: 0;
            height: var(--nav-height);
            background: rgba(255,255,255,0.95);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            z-index: 1000;
            transition: background var(--transition), box-shadow var(--transition);
        }
        .site-header.scrolled { background: rgba(255,255,255,0.98); box-shadow: var(--shadow-sm); }
        .header-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: var(--nav-height);
        }
        .site-logo {
            font-size: 1.35rem;
            font-weight: 800;
            color: var(--primary);
            letter-spacing: 0.02em;
            display: flex;
            align-items: center;
            gap: 10px;
            white-space: nowrap;
        }
        .site-logo i { color: var(--accent); font-size: 1.25rem; }
        .site-logo:hover { color: var(--primary); opacity: 0.85; }
        .main-nav {
            display: flex;
            align-items: center;
            gap: 32px;
        }
        .main-nav a {
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-secondary);
            padding: 6px 0;
            position: relative;
            transition: color var(--transition);
        }
        .main-nav a::after {
            content: '';
            position: absolute;
            left: 0; bottom: -2px;
            width: 0; height: 2px;
            background: var(--accent);
            transition: width var(--transition);
            border-radius: 2px;
        }
        .main-nav a:hover { color: var(--primary); }
        .main-nav a:hover::after { width: 100%; }
        .main-nav a.active { color: var(--primary); font-weight: 600; }
        .main-nav a.active::after { width: 100%; background: var(--accent); }
        .main-nav .nav-cta {
            background: var(--primary);
            color: #fff !important;
            padding: 8px 20px !important;
            border-radius: 40px;
            font-weight: 600;
            font-size: 0.9rem;
            display: flex;
            align-items: center;
            gap: 8px;
            transition: background var(--transition), transform var(--transition);
        }
        .main-nav .nav-cta i { font-size: 0.85rem; }
        .main-nav .nav-cta::after { display: none; }
        .main-nav .nav-cta:hover { background: var(--accent); color: var(--primary-dark) !important; transform: translateY(-1px); }
        .main-nav .nav-cta:active { transform: translateY(0); }
        .nav-toggle {
            display: none;
            font-size: 1.5rem;
            color: var(--primary);
            padding: 4px 8px;
            border: 1px solid var(--border);
            border-radius: var(--radius-sm);
            background: var(--bg-card);
        }
        .nav-toggle:hover { background: var(--bg-alt); }
        @media (max-width: 768px) {
            .nav-toggle { display: block; }
            .main-nav {
                position: fixed;
                top: var(--nav-height); left: 0; right: 0;
                background: rgba(255,255,255,0.98);
                backdrop-filter: blur(12px);
                flex-direction: column;
                gap: 0;
                padding: 16px 24px 24px;
                border-bottom: 1px solid var(--border);
                box-shadow: var(--shadow-md);
                transform: translateY(-110%);
                opacity: 0;
                transition: transform 0.35s ease, opacity 0.3s ease;
                pointer-events: none;
            }
            .main-nav.open {
                transform: translateY(0);
                opacity: 1;
                pointer-events: auto;
            }
            .main-nav a {
                padding: 14px 0;
                width: 100%;
                font-size: 1rem;
                border-bottom: 1px solid var(--border-light);
            }
            .main-nav a:last-of-type { border-bottom: none; }
            .main-nav a::after { display: none; }
            .main-nav a.active { color: var(--accent); font-weight: 700; }
            .main-nav .nav-cta {
                margin-top: 12px;
                justify-content: center;
                width: 100%;
                padding: 12px 20px !important;
            }
        }
        @media (max-width: 480px) {
            .site-logo { font-size: 1.1rem; gap: 6px; }
            .site-logo i { font-size: 1rem; }
        }

        /* ===== 文章 Hero ===== */
        .article-hero {
            padding: 140px 0 60px;
            background: var(--primary);
            background-image: url('/assets/images/backpic/back-1.webp');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            position: relative;
            isolation: isolate;
        }
        .article-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26,42,74,0.88) 0%, rgba(26,42,74,0.70) 100%);
            z-index: 1;
        }
        .article-hero .content-container { position: relative; z-index: 2; }
        .article-hero-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.7);
            margin-bottom: 20px;
        }
        .article-hero-breadcrumb a { color: rgba(255,255,255,0.7); }
        .article-hero-breadcrumb a:hover { color: var(--accent-light); }
        .article-hero-breadcrumb span { color: var(--accent-light); }
        .article-hero-category {
            display: inline-block;
            background: var(--accent);
            color: var(--primary-dark);
            font-size: 0.8rem;
            font-weight: 700;
            padding: 4px 14px;
            border-radius: 30px;
            letter-spacing: 0.02em;
            margin-bottom: 16px;
            text-transform: uppercase;
        }
        .article-hero h1 {
            font-size: 2.6rem;
            font-weight: 800;
            color: #fff;
            line-height: 1.25;
            margin-bottom: 20px;
            letter-spacing: -0.01em;
            max-width: 720px;
        }
        .article-hero-meta {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 20px;
            color: rgba(255,255,255,0.7);
            font-size: 0.9rem;
        }
        .article-hero-meta i { margin-right: 6px; color: var(--accent-light); }
        .article-hero-meta span { display: flex; align-items: center; }
        @media (max-width: 768px) {
            .article-hero { padding: 110px 0 40px; }
            .article-hero h1 { font-size: 1.8rem; }
            .article-hero-meta { gap: 12px; font-size: 0.8rem; }
        }
        @media (max-width: 480px) {
            .article-hero h1 { font-size: 1.5rem; }
            .article-hero-meta { flex-direction: column; align-items: flex-start; gap: 6px; }
        }

        /* ===== 文章正文 ===== */
        .article-body {
            padding: 50px 0 60px;
            background: var(--bg-card);
        }
        .article-body .content-container {
            font-size: 1.05rem;
            line-height: 1.9;
            color: var(--text);
        }
        .article-body .content-container p {
            margin-bottom: 1.4em;
        }
        .article-body .content-container h2 {
            font-size: 1.65rem;
            margin: 2em 0 0.8em;
            color: var(--primary);
            font-weight: 700;
        }
        .article-body .content-container h3 {
            font-size: 1.3rem;
            margin: 1.6em 0 0.6em;
            color: var(--primary-light);
            font-weight: 600;
        }
        .article-body .content-container ul,
        .article-body .content-container ol {
            margin: 1em 0 1.4em;
            padding-left: 1.6em;
        }
        .article-body .content-container ul li { list-style: disc; margin-bottom: 0.4em; }
        .article-body .content-container ol li { list-style: decimal; margin-bottom: 0.4em; }
        .article-body .content-container img {
            border-radius: var(--radius-md);
            margin: 2em auto;
            box-shadow: var(--shadow-md);
        }
        .article-body .content-container blockquote {
            border-left: 4px solid var(--accent);
            padding: 16px 24px;
            margin: 1.6em 0;
            background: var(--bg-alt);
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-secondary);
            font-style: italic;
        }
        .article-body .content-container a { color: var(--accent-dark); font-weight: 600; border-bottom: 1px solid transparent; }
        .article-body .content-container a:hover { border-bottom-color: var(--accent); }
        .article-body .content-container code {
            background: var(--bg-alt);
            padding: 2px 10px;
            border-radius: 4px;
            font-size: 0.9em;
            border: 1px solid var(--border);
        }
        .article-body .content-container pre {
            background: var(--primary-dark);
            color: #e5e7eb;
            padding: 24px;
            border-radius: var(--radius-md);
            overflow-x: auto;
            margin: 1.6em 0;
            font-size: 0.9rem;
        }
        .article-not-found {
            text-align: center;
            padding: 80px 24px;
        }
        .article-not-found i { font-size: 3rem; color: var(--text-light); margin-bottom: 20px; }
        .article-not-found h2 { font-size: 1.8rem; margin-bottom: 16px; }
        .article-not-found p { color: var(--text-secondary); margin-bottom: 24px; }
        .article-not-found .btn {
            display: inline-block;
            padding: 12px 32px;
            background: var(--primary);
            color: #fff;
            border-radius: 40px;
            font-weight: 600;
            transition: background var(--transition), transform var(--transition);
        }
        .article-not-found .btn:hover { background: var(--accent); color: var(--primary-dark); transform: translateY(-2px); }
        @media (max-width: 768px) {
            .article-body .content-container { font-size: 1rem; }
            .article-body .content-container h2 { font-size: 1.4rem; }
        }

        /* ===== 标签 / 分享 ===== */
        .article-footer-meta {
            padding: 30px 0 10px;
            border-top: 1px solid var(--border);
            margin-top: 40px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
        }
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
        }
        .article-tags .tag {
            display: inline-block;
            padding: 4px 16px;
            background: var(--bg-alt);
            border: 1px solid var(--border);
            border-radius: 30px;
            font-size: 0.8rem;
            color: var(--text-secondary);
            font-weight: 500;
            transition: all var(--transition);
        }
        .article-tags .tag:hover { background: var(--accent); color: var(--primary-dark); border-color: var(--accent); }
        .article-share {
            display: flex;
            align-items: center;
            gap: 12px;
            color: var(--text-secondary);
            font-size: 0.9rem;
        }
        .article-share a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 36px; height: 36px;
            border-radius: 50%;
            background: var(--bg-alt);
            border: 1px solid var(--border);
            color: var(--text-secondary);
            transition: all var(--transition);
        }
        .article-share a:hover { background: var(--primary); color: #fff; border-color: var(--primary); transform: translateY(-2px); }
        @media (max-width: 640px) {
            .article-footer-meta { flex-direction: column; align-items: flex-start; }
        }

        /* ===== 相关推荐 ===== */
        .related-section {
            padding: 60px 0;
            background: var(--bg);
        }
        .related-section .section-title {
            text-align: center;
            font-size: 1.8rem;
            margin-bottom: 12px;
        }
        .related-section .section-subtitle {
            text-align: center;
            color: var(--text-secondary);
            margin-bottom: 40px;
            font-size: 1rem;
        }
        .related-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 28px;
        }
        .related-card {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--border);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
        .related-card-img {
            width: 100%;
            height: 200px;
            object-fit: cover;
            background: var(--bg-alt);
        }
        .related-card-body {
            padding: 20px 24px 24px;
        }
        .related-card-body .card-cat {
            display: inline-block;
            font-size: 0.75rem;
            font-weight: 600;
            color: var(--accent-dark);
            text-transform: uppercase;
            letter-spacing: 0.04em;
            margin-bottom: 8px;
        }
        .related-card-body h3 {
            font-size: 1.05rem;
            font-weight: 700;
            color: var(--primary);
            margin-bottom: 8px;
            line-height: 1.4;
        }
        .related-card-body h3 a { color: inherit; }
        .related-card-body h3 a:hover { color: var(--accent-dark); }
        .related-card-body p {
            font-size: 0.88rem;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 12px;
            display: -webkit-box;
            -webkit-line-clamp: 2;
            -webkit-box-orient: vertical;
            overflow: hidden;
        }
        .related-card-body .card-date {
            font-size: 0.78rem;
            color: var(--text-light);
            display: flex;
            align-items: center;
            gap: 4px;
        }
        @media (max-width: 1024px) {
            .related-grid { grid-template-columns: repeat(2, 1fr); }
        }
        @media (max-width: 640px) {
            .related-grid { grid-template-columns: 1fr; }
            .related-section .section-title { font-size: 1.4rem; }
        }

        /* ===== FAQ ===== */
        .faq-section {
            padding: 60px 0 80px;
            background: var(--bg-card);
        }
        .faq-section .section-title {
            text-align: center;
            font-size: 1.8rem;
            margin-bottom: 12px;
        }
        .faq-section .section-subtitle {
            text-align: center;
            color: var(--text-secondary);
            margin-bottom: 40px;
            font-size: 1rem;
        }
        .faq-list {
            max-width: 720px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 0;
            border-top: 1px solid var(--border);
        }
        .faq-item {
            border-bottom: 1px solid var(--border);
            padding: 0;
        }
        .faq-question {
            display: flex;
            align-items: center;
            justify-content: space-between;
            width: 100%;
            padding: 20px 0;
            font-size: 1.05rem;
            font-weight: 600;
            color: var(--primary);
            text-align: left;
            background: none;
            border: none;
            transition: color var(--transition);
            gap: 16px;
        }
        .faq-question:hover { color: var(--accent-dark); }
        .faq-question i {
            font-size: 0.85rem;
            color: var(--text-light);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-question.open i { transform: rotate(180deg); color: var(--accent); }
        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.4s ease, padding 0.3s ease;
            padding: 0;
            color: var(--text-secondary);
            line-height: 1.8;
            font-size: 0.95rem;
        }
        .faq-answer.open {
            max-height: 300px;
            padding: 0 0 20px 0;
        }
        .faq-answer p { margin-bottom: 0.6em; }
        @media (max-width: 768px) {
            .faq-section .section-title { font-size: 1.4rem; }
            .faq-question { font-size: 0.95rem; padding: 16px 0; }
        }

        /* ===== CTA ===== */
        .cta-section {
            padding: 80px 0;
            background: var(--primary);
            background-image: url('/assets/images/backpic/back-2.webp');
            background-size: cover;
            background-position: center;
            background-blend-mode: overlay;
            position: relative;
            isolation: isolate;
            text-align: center;
        }
        .cta-section::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(26,42,74,0.9) 0%, rgba(26,42,74,0.75) 100%);
            z-index: 1;
        }
        .cta-section .container { position: relative; z-index: 2; }
        .cta-section h2 {
            font-size: 2rem;
            color: #fff;
            margin-bottom: 16px;
            font-weight: 800;
        }
        .cta-section p {
            color: rgba(255,255,255,0.8);
            max-width: 580px;
            margin: 0 auto 32px;
            font-size: 1.05rem;
            line-height: 1.7;
        }
        .cta-buttons {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 16px;
        }
        .cta-btn {
            display: inline-block;
            padding: 14px 36px;
            border-radius: 40px;
            font-weight: 700;
            font-size: 1rem;
            transition: all var(--transition);
        }
        .cta-btn.primary {
            background: var(--accent);
            color: var(--primary-dark);
        }
        .cta-btn.primary:hover { background: #fff; color: var(--primary); transform: translateY(-2px); box-shadow: var(--shadow-md); }
        .cta-btn.secondary {
            background: transparent;
            color: #fff;
            border: 2px solid rgba(255,255,255,0.4);
        }
        .cta-btn.secondary:hover { border-color: var(--accent); color: var(--accent); transform: translateY(-2px); }
        @media (max-width: 768px) {
            .cta-section { padding: 60px 0; }
            .cta-section h2 { font-size: 1.5rem; }
            .cta-section p { font-size: 0.95rem; }
            .cta-btn { padding: 12px 28px; font-size: 0.9rem; }
        }

        /* ===== 页脚 ===== */
        .site-footer {
            background: var(--primary-dark);
            color: rgba(255,255,255,0.75);
            padding: 60px 0 30px;
        }
        .footer-inner {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            gap: 48px;
            margin-bottom: 40px;
        }
        .footer-brand .site-logo { color: #fff; margin-bottom: 16px; }
        .footer-brand .site-logo i { color: var(--accent); }
        .footer-brand p {
            font-size: 0.9rem;
            line-height: 1.7;
            color: rgba(255,255,255,0.6);
            max-width: 360px;
        }
        .footer-links { display: flex; gap: 48px; }
        .footer-links-col h4 {
            color: #fff;
            font-size: 0.95rem;
            margin-bottom: 16px;
            font-weight: 700;
        }
        .footer-links-col a {
            display: block;
            color: rgba(255,255,255,0.55);
            font-size: 0.88rem;
            padding: 5px 0;
            transition: color var(--transition);
        }
        .footer-links-col a:hover { color: var(--accent); }
        .footer-bottom {
            border-top: 1px solid rgba(255,255,255,0.1);
            padding-top: 24px;
            text-align: center;
            font-size: 0.85rem;
            color: rgba(255,255,255,0.4);
        }
        .footer-bottom a { color: rgba(255,255,255,0.5); }
        .footer-bottom a:hover { color: var(--accent); }
        @media (max-width: 900px) {
            .footer-inner { grid-template-columns: 1fr; gap: 32px; }
            .footer-links { gap: 32px; }
        }
        @media (max-width: 640px) {
            .site-footer { padding: 40px 0 20px; }
            .footer-links { flex-direction: column; gap: 24px; }
            .footer-brand p { max-width: 100%; }
        }

        /* ===== 通用辅助 ===== */
        .sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); border: 0; }
        .text-center { text-align: center; }
        .mt-8 { margin-top: 8px; }
        .mb-8 { margin-bottom: 8px; }
        .mb-16 { margin-bottom: 16px; }
        .mb-24 { margin-bottom: 24px; }
        .mb-32 { margin-bottom: 32px; }