/* roulang page: index */
:root {
  --primary: #3E7CB1;
  --primary-light: #EAF2F8;
  --accent: #F08C3A;
  --accent-light: #FFF4E6;
  --canvas: #F6F8FB;
  --surface: #FFFFFF;
  --text-main: #1F2A37;
  --text-sub: #5B6B7C;
  --text-muted: #9AA8B7;
  --border: #E3E9EF;
  --footer-bg: #13293D;
  --footer-text: #E7EDF3;
  --footer-sub: #8297A8;
  --radius-card: 16px;
  --radius-btn: 10px;
  --radius-tag: 6px;
  --radius-image: 20px;
  --radius-modal: 24px;
  --shadow-card: 0 1px 2px rgba(16,24,40,0.05), 0 4px 12px rgba(16,24,40,0.04);
  --shadow-hover: 0 8px 24px rgba(16,24,40,0.09);
  --transition: 0.2s ease;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
  background: var(--canvas);
  color: var(--text-main);
  line-height: 1.8;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; transition: color var(--transition); }
img { max-width: 100%; display: block; }
button, input, select, textarea { font-family: inherit; font-size: inherit; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
@media (max-width: 768px) { .container { padding: 0 16px; } }
.section-space { padding: 80px 0; }
@media (max-width: 768px) { .section-space { padding: 48px 0; } }
.section-title { font-size: 24px; font-weight: 700; line-height: 1.4; margin-bottom: 12px; color: var(--text-main); }
@media (max-width: 768px) { .section-title { font-size: 20px; } }
.section-desc { font-size: 14px; color: var(--text-sub); max-width: 520px; margin-bottom: 32px; }
.btn { display: inline-flex; align-items: center; justify-content: center; border-radius: var(--radius-btn); padding: 12px 24px; font-weight: 600; font-size: 15px; cursor: pointer; transition: all var(--transition); border: none; outline: none; }
.btn:focus-visible { outline: 2px solid rgba(240,140,58,0.5); outline-offset: 2px; }
.btn-primary { background: var(--accent); color: #fff; box-shadow: 0 4px 12px rgba(240,140,58,0.25); }
.btn-primary:hover { background: #E07B28; transform: translateY(-1px); }
.btn-primary:active { transform: translateY(1px); }
.btn-secondary { background: transparent; color: var(--primary); border: 1.5px solid var(--primary); }
.btn-secondary:hover { background: var(--primary-light); }
.btn-secondary:active { border-color: #2C5F8A; }
.btn-white { background: #ffffff; color: var(--primary); }
.btn-white:hover { background: rgba(255,255,255,0.9); transform: translateY(-1px); }
.btn-sm { padding: 8px 16px; font-size: 14px; }
.btn-lg { padding: 14px 32px; font-size: 16px; }
.btn-disabled { background: var(--border); color: var(--text-muted); cursor: not-allowed; box-shadow: none; }
.btn-disabled:hover { transform: none; background: var(--border); }
.badge { display: inline-flex; align-items: center; padding: 4px 10px; border-radius: 999px; font-size: 12px; font-weight: 600; }
.badge-accent { background: var(--accent-light); color: var(--accent); }
.badge-primary { background: var(--primary-light); color: var(--primary); }
.badge-green { background: #E6F7E6; color: #2E7D32; }

/* 导航 */
.site-nav { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; padding: 12px 24px 0; }
@media (max-width: 768px) { .site-nav { padding: 8px 12px 0; } }
.nav-card { background: var(--surface); border-radius: var(--radius-card); box-shadow: var(--shadow-card); display: flex; align-items: center; height: 64px; padding: 0 20px; position: relative; border: 1px solid rgba(227,233,239,0.6); }
.nav-logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo-icon { width: 40px; height: 40px; background: linear-gradient(135deg, var(--primary), #2C5F8A); border-radius: 10px; display: flex; align-items: center; justify-content: center; color: #fff; font-weight: 800; font-size: 14px; letter-spacing: 1px; flex-shrink: 0; }
.logo-text { font-size: 16px; font-weight: 700; color: var(--text-main); line-height: 1.2; white-space: nowrap; }
@media (max-width: 1024px) { .logo-text { font-size: 14px; } }
@media (max-width: 768px) { .logo-text { max-width: 120px; overflow: hidden; text-overflow: ellipsis; font-size: 12px; } }
.nav-menu { display: flex; align-items: center; gap: 6px; margin-left: 24px; flex: 1; overflow-x: auto; scrollbar-width: none; }
.nav-menu::-webkit-scrollbar { display: none; }
.nav-item { display: inline-flex; align-items: center; gap: 6px; padding: 8px 16px; border-radius: var(--radius-btn); background: #F1F5F8; color: var(--text-sub); font-size: 14px; font-weight: 500; white-space: nowrap; transition: all var(--transition); }
.nav-item:hover { background: var(--primary-light); color: var(--primary); }
.nav-item.active { background: var(--primary-light); color: var(--primary); position: relative; font-weight: 600; }
.nav-item.active::after { content: ''; position: absolute; bottom: -2px; left: 50%; transform: translateX(-50%); width: 24px; height: 2px; background: var(--primary); border-radius: 2px; }
.nav-item i { font-size: 13px; }
.nav-actions { display: flex; align-items: center; gap: 8px; margin-left: auto; flex-shrink: 0; }
.nav-btn-icon { width: 40px; height: 40px; border-radius: var(--radius-btn); background: #F1F5F8; border: none; display: flex; align-items: center; justify-content: center; color: var(--text-sub); cursor: pointer; transition: all var(--transition); }
.nav-btn-icon:hover { background: var(--primary-light); color: var(--primary); }
@media (max-width: 768px) {
  .nav-menu { margin-left: 8px; gap: 4px; }
  .nav-item { padding: 6px 10px; font-size: 12px; }
  .nav-item i { display: none; }
  .nav-btn-icon { display: none; }
  .nav-card { height: 56px; padding: 0 12px; }
  .logo-icon { width: 32px; height: 32px; font-size: 12px; }
  .btn-nav-small { padding: 6px 12px !important; font-size: 12px !important; }
}

/* 倒计时条 */
.countdown-bar { background: linear-gradient(120deg, #3E7CB1, #2C5F8A); border-radius: 14px; padding: 14px 20px; display: flex; align-items: center; gap: 20px; color: #fff; flex-wrap: wrap; margin-bottom: 40px; }
.countdown-info { display: flex; align-items: center; gap: 12px; font-size: 14px; }
.countdown-info .status-dot { width: 8px; height: 8px; background: #F08C3A; border-radius: 50%; box-shadow: 0 0 10px rgba(240,140,58,0.6); }
.countdown-timer { display: flex; align-items: center; gap: 8px; }
.timer-box { background: #fff; border-radius: 8px; text-align: center; padding: 6px 10px; min-width: 52px; }
.timer-box .num { font-size: 22px; font-weight: 800; color: #1F2A37; line-height: 1; font-variant-numeric: tabular-nums; }
.timer-box .label { font-size: 11px; color: #9AA8B7; margin-top: 2px; line-height: 1; }
.timer-sep { font-size: 18px; font-weight: 700; color: rgba(255,255,255,0.6); }
.countdown-btn { margin-left: auto; }
@media (max-width: 768px) {
  .countdown-bar { padding: 12px 16px; gap: 12px; }
  .countdown-info { font-size: 12px; }
  .timer-box { min-width: 40px; padding: 4px 6px; }
  .timer-box .num { font-size: 16px; }
  .countdown-btn { width: 100%; margin-left: 0; }
  .countdown-btn .btn { width: 100%; }
}

/* Hero */
.hero-wrap { padding-top: 100px; position: relative; overflow: hidden; }
@media (max-width: 768px) { .hero-wrap { padding-top: 80px; } }
.hero-bg { position: absolute; right: -100px; bottom: -100px; width: 400px; height: 400px; background: url('/assets/images/backpic/back-1.webp') center/cover no-repeat; opacity: 0.12; border-radius: 50%; pointer-events: none; }
.hero-content { display: flex; align-items: center; gap: 48px; position: relative; z-index: 2; min-height: 70vh; padding: 60px 0; }
@media (max-width: 768px) { .hero-content { flex-direction: column; gap: 32px; padding: 40px 0; } }
.hero-left { flex: 1.1; }
.hero-right { flex: 0.9; }
@media (max-width: 768px) { .hero-left, .hero-right { flex: 1 1 100%; } }
.hero-title { font-size: 42px; font-weight: 800; line-height: 1.3; color: var(--text-main); margin-bottom: 16px; }
@media (max-width: 768px) { .hero-title { font-size: 28px; } }
.hero-title .highlight { color: var(--primary); }
.hero-sub { font-size: 16px; color: var(--text-sub); line-height: 1.8; margin-bottom: 32px; max-width: 480px; }
@media (max-width: 768px) { .hero-sub { font-size: 14px; } }
.hero-ctas { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 28px; }
.hero-trust { display: flex; flex-wrap: wrap; gap: 16px; }
.trust-item { display: flex; align-items: center; gap: 6px; font-size: 13px; color: var(--text-sub); }
.trust-item .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); }
.hero-image-wrap { position: relative; }
.hero-image-wrap img { border-radius: var(--radius-image); box-shadow: var(--shadow-hover); width: 100%; height: auto; max-height: 420px; object-fit: cover; }
.hero-badge { position: absolute; top: 16px; right: 16px; background: var(--accent); color: #fff; border-radius: 999px; padding: 6px 16px; font-size: 13px; font-weight: 600; box-shadow: 0 4px 12px rgba(240,140,58,0.4); }

/* 卖点 */
.sell-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
@media (max-width: 768px) { .sell-grid { grid-template-columns: 1fr; } }
.sell-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-card); padding: 32px; transition: all var(--transition); position: relative; overflow: hidden; }
.sell-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); border-color: rgba(62,124,177,0.3); }
.sell-card.wide { grid-column: 1 / -1; }
@media (max-width: 768px) { .sell-card.wide { grid-column: auto; } }
.sell-num { font-size: 42px; font-weight: 800; color: rgba(62,124,177,0.4); line-height: 1; margin-bottom: 12px; transition: opacity var(--transition); }
.sell-card:hover .sell-num { color: rgba(62,124,177,0.8); }
.sell-title { font-size: 18px; font-weight: 700; color: var(--text-main); margin-bottom: 8px; }
.sell-desc { font-size: 14px; color: var(--text-sub); line-height: 1.7; }

/* 图墙 */
.gallery-grid { display: grid; grid-template-columns: 3fr 2fr; gap: 24px; }
@media (max-width: 768px) { .gallery-grid { grid-template-columns: 1fr; } }
.gallery-main { position: relative; border-radius: var(--radius-image); overflow: hidden; height: 360px; box-shadow: var(--shadow-card); }
.gallery-main img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.gallery-main:hover img { transform: scale(1.03); }
.gallery-side { display: grid; grid-template-rows: 1fr 1fr; gap: 24px; }
.gallery-side-item { position: relative; border-radius: var(--radius-image); overflow: hidden; box-shadow: var(--shadow-card); }
.gallery-side-item img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.gallery-side-item:hover img { transform: scale(1.03); }
.gallery-caption { position: absolute; bottom: 12px; left: 12px; background: rgba(19,41,61,0.7); color: #fff; font-size: 14px; padding: 6px 14px; border-radius: 999px; backdrop-filter: blur(4px); }
@media (max-width: 768px) { .gallery-main { height: 240px; } .gallery-side { grid-template-rows: 1fr 1fr; gap: 16px; } .gallery-side-item { height: 180px; } }

/* CTA */
.cta-card { border-radius: var(--radius-modal); background: linear-gradient(120deg, #3E7CB1, #2A5C82); color: #fff; padding: 56px; display: flex; align-items: center; justify-content: space-between; gap: 32px; position: relative; overflow: hidden; }
@media (max-width: 768px) { .cta-card { flex-direction: column; padding: 40px 24px; text-align: center; } }
.cta-card::after { content: ''; position: absolute; bottom: -60px; right: -60px; width: 200px; height: 200px; border-radius: 50%; background: rgba(255,255,255,0.06); }
.cta-title { font-size: 28px; font-weight: 700; margin-bottom: 12px; line-height: 1.3; }
@media (max-width: 768px) { .cta-title { font-size: 22px; } }
.cta-desc { font-size: 15px; color: rgba(255,255,255,0.9); max-width: 480px; line-height: 1.7; }

/* CMS列表 */
.news-list { display: flex; flex-direction: column; gap: 16px; }
.news-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-card); padding: 24px; display: flex; align-items: center; gap: 20px; transition: all var(--transition); }
.news-card:hover { box-shadow: var(--shadow-hover); transform: translateX(4px); }
.news-card-body { flex: 1; min-width: 0; }
.news-cat { display: inline-block; font-size: 12px; color: var(--primary); background: var(--primary-light); border-radius: var(--radius-tag); padding: 2px 8px; margin-bottom: 6px; font-weight: 600; }
.news-title { font-size: 16px; font-weight: 600; color: var(--text-main); margin-bottom: 6px; line-height: 1.4; }
.news-title a:hover { color: var(--primary); }
.news-summary { font-size: 13px; color: var(--text-sub); line-height: 1.6; overflow: hidden; text-overflow: ellipsis; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }
.news-meta { display: flex; align-items: center; gap: 8px; font-size: 12px; color: var(--text-muted); flex-shrink: 0; }
.news-arrow { color: var(--text-muted); font-size: 18px; transition: color var(--transition); }
.news-card:hover .news-arrow { color: var(--primary); }
.empty-state { border: 1.5px dashed var(--border); border-radius: var(--radius-card); background: #F9FAFB; padding: 48px; text-align: center; color: var(--text-muted); }
.empty-state i { font-size: 40px; margin-bottom: 12px; display: block; }
.empty-state p { font-size: 14px; }
@media (max-width: 768px) { .news-card { flex-direction: column; padding: 16px; align-items: flex-start; gap: 8px; } .news-meta { width: 100%; justify-content: flex-start; } }

/* FAQ */
.faq-wrap { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-card); overflow: hidden; }
.faq-item { border-bottom: 1px solid var(--border); }
.faq-item:last-child { border-bottom: none; }
.faq-q { padding: 20px 24px; display: flex; align-items: center; gap: 16px; cursor: pointer; transition: background var(--transition); }
.faq-q:hover { background: #F9FAFB; }
.faq-q-icon { width: 32px; height: 32px; border-radius: 50%; background: var(--primary-light); color: var(--primary); display: flex; align-items: center; justify-content: center; font-size: 14px; font-weight: 700; flex-shrink: 0; }
.faq-q-text { flex: 1; font-size: 16px; font-weight: 600; color: var(--text-main); }
.faq-q-arrow { width: 24px; height: 24px; display: flex; align-items: center; justify-content: center; color: var(--text-muted); transition: transform 0.3s ease; }
.faq-item.active .faq-q-arrow { transform: rotate(45deg); color: var(--accent); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height 0.3s ease; }
.faq-a-inner { padding: 0 24px 20px 72px; font-size: 14px; color: var(--text-sub); line-height: 1.8; }
.faq-item.active .faq-a { max-height: 300px; }
@media (max-width: 768px) { .faq-a-inner { padding-left: 24px; padding-right: 16px; } }

/* 页脚 */
.site-footer { background: var(--footer-bg); color: var(--footer-text); padding: 60px 0 0; margin-top: 0; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 40px; }
@media (max-width: 1024px) { .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; } }
@media (max-width: 768px) { .footer-grid { grid-template-columns: 1fr; gap: 24px; } }
.footer-brand { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.footer-brand .logo-icon { background: rgba(255,255,255,0.15); }
.footer-brand-name { font-size: 18px; font-weight: 700; color: var(--footer-text); }
.footer-desc { font-size: 14px; color: var(--footer-sub); line-height: 1.7; max-width: 320px; }
.footer-title { font-size: 15px; font-weight: 600; color: var(--footer-text); margin-bottom: 16px; }
.footer-links { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.footer-links a { color: var(--footer-sub); font-size: 13px; transition: color var(--transition); }
.footer-links a:hover { color: #fff; }
.footer-contact { display: flex; flex-direction: column; gap: 10px; font-size: 13px; color: var(--footer-sub); }
.footer-contact i { margin-right: 8px; color: #A8C6DF; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.08); padding: 16px 0; text-align: center; font-size: 13px; color: var(--footer-sub); }

/* 面包屑样式（预留） */
.breadcrumb { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text-muted); margin-bottom: 16px; flex-wrap: wrap; }
.breadcrumb a { color: var(--primary); }
.breadcrumb a:hover { text-decoration: underline; }
.breadcrumb .sep { color: var(--text-muted); }

/* 通用图片卡 */
.img-card { border-radius: var(--radius-card); overflow: hidden; box-shadow: var(--shadow-card); }
.img-card img { width: 100%; height: 100%; object-fit: cover; }

/* roulang page: category1 */
:root {
    --primary: #3E7CB1;
    --primary-light: #EAF2F8;
    --accent: #F08C3A;
    --accent-light: #FFF4E6;
    --canvas: #F6F8FB;
    --surface: #FFFFFF;
    --ink: #1F2A37;
    --ink-soft: #5B6B7C;
    --ink-muted: #9AA8B7;
    --border: #E3E9EF;
    --footer: #13293D;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --shadow-sm: 0 1px 2px rgba(16,24,40,0.05), 0 4px 12px rgba(16,24,40,0.04);
    --shadow-lg: 0 8px 24px rgba(16,24,40,0.09);
    --transition: all 0.2s ease;
  }

  * { box-sizing: border-box; margin: 0; padding: 0; }
  html { scroll-behavior: smooth; }
  body {
    font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    background: var(--canvas);
    color: var(--ink);
    font-size: 15px;
    line-height: 1.8;
    -webkit-font-smoothing: antialiased;
  }
  a { color: inherit; text-decoration: none; }
  img { max-width: 100%; display: block; }
  button { font-family: inherit; }
  input, select, textarea { font-family: inherit; }
  i { line-height: 1; }

  .container {
    max-width: 1200px;
    margin: 0 auto;
    padding-left: 24px;
    padding-right: 24px;
  }
  .section { padding: 80px 0; }

  /* ===== Buttons ===== */
  .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border-radius: 10px;
    padding: 12px 24px;
    font-size: 15px;
    font-weight: 600;
    border: 1.5px solid transparent;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
  }
  .btn:focus-visible {
    outline: 2px solid rgba(240, 140, 58, 0.5);
    outline-offset: 2px;
  }
  .btn-primary {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
  }
  .btn-primary:hover { background: #E07B28; transform: translateY(-1px); }
  .btn-primary:active { transform: translateY(0); }
  .btn-outline {
    background: transparent;
    color: var(--primary);
    border-color: var(--primary);
  }
  .btn-outline:hover { background: var(--primary-light); }
  .btn-outline:active { border-color: #2F5E85; }
  .btn-outline-light {
    background: transparent;
    color: #fff;
    border-color: rgba(255,255,255,0.7);
  }
  .btn-outline-light:hover { background: rgba(255,255,255,0.1); border-color: #fff; }
  .btn-white {
    background: #fff;
    color: var(--primary);
    border-color: #fff;
  }
  .btn-white:hover { background: #F6F8FB; transform: translateY(-1px); }
  .btn-white:active { transform: translateY(0); }
  .btn-sm { padding: 9px 16px; font-size: 13px; }
  .btn-lg { padding: 14px 32px; font-size: 16px; }

  /* ===== Header Nav ===== */
  .site-nav {
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 12px 0 4px;
    background: transparent;
  }
  .nav-card {
    background: var(--surface);
    border-radius: 16px;
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 16px;
    gap: 18px;
  }
  .nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
  }
  .logo-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--primary), #2C5F8A);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 16px;
    letter-spacing: 0.5px;
  }
  .logo-text {
    font-size: 16px;
    font-weight: 800;
    color: var(--ink);
    letter-spacing: 0.2px;
    white-space: nowrap;
  }
  .nav-menu {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 1;
    overflow-x: auto;
  }
  .nav-item {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 16px;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 600;
    color: var(--ink-soft);
    background: #F1F5F8;
    transition: var(--transition);
    white-space: nowrap;
    position: relative;
  }
  .nav-item i { font-size: 14px; color: var(--ink-muted); transition: var(--transition); }
  .nav-item:hover { background: var(--primary-light); color: var(--primary); }
  .nav-item:hover i { color: var(--primary); }
  .nav-item.active { background: var(--primary-light); color: var(--primary); }
  .nav-item.active i { color: var(--primary); }
  .nav-item.active::after {
    content: '';
    position: absolute;
    bottom: 3px;
    left: 18px;
    right: 18px;
    height: 2px;
    background: var(--primary);
    border-radius: 2px;
  }
  .nav-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
  }
  .nav-btn-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    border: 1px solid var(--border);
    background: var(--surface);
    color: var(--ink-soft);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 15px;
    cursor: pointer;
    transition: var(--transition);
  }
  .nav-btn-icon:hover { background: var(--primary-light); color: var(--primary); border-color: var(--primary-light); }

  /* ===== Page Hero ===== */
  .page-hero {
    padding: 56px 0 48px;
    background: linear-gradient(180deg, #EAF2F8 0%, #F6F8FB 100%);
    position: relative;
    overflow: hidden;
  }
  .page-hero::after {
    content: '';
    position: absolute;
    right: -80px;
    top: -60px;
    width: 360px;
    height: 360px;
    background-image: url('/assets/images/backpic/back-1.webp');
    background-size: cover;
    background-position: center;
    opacity: 0.08;
    border-radius: 50%;
    pointer-events: none;
  }
  .breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    color: var(--ink-muted);
    margin-bottom: 20px;
    position: relative;
    z-index: 1;
  }
  .breadcrumb a { color: var(--primary); }
  .breadcrumb a:hover { text-decoration: underline; }
  .page-hero h1 {
    font-size: 34px;
    font-weight: 800;
    line-height: 1.4;
    color: var(--ink);
    position: relative;
    z-index: 1;
  }
  .page-hero h1 span { color: var(--primary); }
  .page-hero .hero-desc {
    margin-top: 12px;
    font-size: 16px;
    color: var(--ink-soft);
    max-width: 560px;
    position: relative;
    z-index: 1;
  }

  /* ===== Split Layout ===== */
  .split-layout {
    display: grid;
    grid-template-columns: 1fr 360px;
    gap: 40px;
    align-items: start;
  }
  .split-main { min-width: 0; }
  .split-side { position: sticky; top: 100px; }

  .section-label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    font-weight: 700;
    color: var(--primary);
    background: var(--primary-light);
    padding: 6px 14px;
    border-radius: 6px;
    margin-bottom: 12px;
  }
  .section-title {
    font-size: 26px;
    font-weight: 700;
    color: var(--ink);
    line-height: 1.4;
    margin-bottom: 12px;
  }
  .section-sub { font-size: 14px; color: var(--ink-soft); }

  /* ===== Timeline ===== */
  .timeline {
    position: relative;
    padding-left: 72px;
    margin-top: 28px;
  }
  .timeline::before {
    content: '';
    position: absolute;
    left: 24px;
    top: 8px;
    bottom: 8px;
    width: 2px;
    background: linear-gradient(to bottom, var(--primary), #C9DFEF);
    border-radius: 2px;
  }
  .timeline-item {
    position: relative;
    margin-bottom: 24px;
  }
  .timeline-item:last-child { margin-bottom: 0; }
  .timeline-marker {
    position: absolute;
    left: -60px;
    top: 18px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--primary);
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 700;
    box-shadow: 0 0 0 6px var(--primary-light);
    z-index: 2;
  }
  .timeline-content {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 20px 24px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
  }
  .timeline-content:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
  }
  .timeline-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    margin-bottom: 8px;
  }
  .timeline-head h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--ink);
  }
  .timeline-tag {
    font-size: 12px;
    font-weight: 600;
    background: var(--accent-light);
    color: var(--accent);
    padding: 3px 10px;
    border-radius: 6px;
    flex-shrink: 0;
  }
  .timeline-content p {
    font-size: 14px;
    color: var(--ink-soft);
    line-height: 1.8;
  }
  .timeline-list {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 12px;
  }
  .timeline-list span {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: 13px;
    color: var(--ink-soft);
  }
  .timeline-list i { color: var(--primary); font-size: 13px; }

  .back-links {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    margin-top: 32px;
    padding-top: 20px;
    border-top: 1px dashed var(--border);
  }
  .back-links a {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    font-weight: 600;
    color: var(--primary);
    padding: 8px 14px;
    border-radius: 10px;
    background: var(--primary-light);
    transition: var(--transition);
  }
  .back-links a:hover { background: #DCEBF5; transform: translateY(-1px); }
  .back-links a i { font-size: 13px; }

  /* ===== Side Card ===== */
  .side-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 24px;
    box-shadow: var(--shadow-sm);
    margin-bottom: 20px;
  }
  .side-card-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 16px;
  }
  .side-card-header .sc-icon {
    width: 36px;
    height: 36px;
    border-radius: 10px;
    background: var(--primary-light);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 15px;
  }
  .side-card-header h3 {
    font-size: 15px;
    font-weight: 700;
    color: var(--ink);
  }
  .side-status-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }
  .side-status-item {
    background: var(--canvas);
    border-radius: 10px;
    padding: 12px;
    text-align: center;
  }
  .side-status-item .val {
    font-size: 15px;
    font-weight: 700;
    color: var(--ink);
  }
  .side-status-item .lab {
    font-size: 12px;
    color: var(--ink-muted);
  }
  .side-status-item.green .val { color: #2E9E5B; }
  .side-status-item.blue .val { color: var(--primary); }

  .side-list {
    list-style: none;
  }
  .side-list li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 14px;
    color: var(--ink-soft);
    padding: 8px 0;
    border-bottom: 1px solid var(--canvas);
    line-height: 1.6;
  }
  .side-list li:last-child { border-bottom: none; }
  .side-list i {
    color: var(--primary);
    margin-top: 4px;
    font-size: 13px;
  }
  .side-contact {
    display: flex;
    flex-direction: column;
    gap: 10px;
  }
  .side-contact span {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: var(--ink-soft);
  }
  .side-contact i {
    color: var(--primary);
    width: 18px;
    text-align: center;
  }

  /* ===== Method Section ===== */
  .method-section {
    background: var(--surface);
    border-top: 1px solid var(--border);
    border-bottom: 1px solid var(--border);
  }
  .section-head {
    text-align: center;
    max-width: 640px;
    margin: 0 auto 40px;
  }
  .section-head .section-tag {
    display: inline-block;
    font-size: 13px;
    font-weight: 700;
    color: var(--primary);
    background: var(--primary-light);
    padding: 6px 16px;
    border-radius: 6px;
    margin-bottom: 12px;
  }
  .section-head h2 {
    font-size: 28px;
    font-weight: 800;
    color: var(--ink);
    line-height: 1.4;
    margin-bottom: 8px;
  }
  .section-head p {
    font-size: 14px;
    color: var(--ink-soft);
  }
  .method-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
  }
  .method-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 28px 24px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    position: relative;
  }
  .method-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
  }
  .method-card .method-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: var(--primary-light);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    margin-bottom: 16px;
  }
  .method-card h3 {
    font-size: 17px;
    font-weight: 700;
    color: var(--ink);
    margin-bottom: 8px;
  }
  .method-card p {
    font-size: 14px;
    color: var(--ink-soft);
    line-height: 1.7;
  }
  .method-note {
    position: absolute;
    top: 16px;
    right: 16px;
    font-size: 12px;
    font-weight: 600;
    background: var(--accent-light);
    color: var(--accent);
    padding: 4px 10px;
    border-radius: 6px;
  }

  /* ===== Security Section ===== */
  .security-section {
    padding: 80px 0;
    background: var(--footer);
    color: #fff;
  }
  .security-wrap {
    display: grid;
    grid-template-columns: 1fr 1.4fr;
    gap: 48px;
    align-items: start;
  }
  .security-left .section-tag-light {
    display: inline-block;
    font-size: 13px;
    font-weight: 700;
    color: #A8C6DF;
    background: rgba(255,255,255,0.08);
    padding: 6px 16px;
    border-radius: 6px;
    margin-bottom: 12px;
  }
  .security-left h2 {
    font-size: 28px;
    font-weight: 800;
    color: #fff;
    line-height: 1.4;
    margin-bottom: 12px;
  }
  .security-left p {
    font-size: 14px;
    color: #A8C6DF;
    margin-bottom: 24px;
  }
  .security-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }
  .security-item {
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 16px;
    padding: 20px;
    display: flex;
    gap: 14px;
    transition: var(--transition);
  }
  .security-item:hover { background: rgba(255,255,255,0.1); transform: translateY(-2px); }
  .security-item i {
    font-size: 18px;
    color: #A8C6DF;
    margin-top: 4px;
    flex-shrink: 0;
  }
  .security-item h4 {
    font-size: 15px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 4px;
  }
  .security-item p {
    font-size: 13px;
    color: #A8C6DF;
    line-height: 1.6;
    margin: 0;
  }

  /* ===== FAQ ===== */
  .faq-wrap {
    max-width: 780px;
    margin: 0 auto;
  }
  .faq-item {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    margin-bottom: 14px;
    overflow: hidden;
    transition: var(--transition);
  }
  .faq-item:hover { border-color: var(--primary); }
  .faq-item.open { box-shadow: var(--shadow-sm); }
  .faq-q {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 18px 20px;
    cursor: pointer;
    user-select: none;
  }
  .faq-qmark {
    width: 28px;
    height: 28px;
    border-radius: 8px;
    background: var(--primary-light);
    color: var(--primary);
    font-size: 13px;
    font-weight: 800;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
  }
  .faq-q span.faq-q-text {
    flex: 1;
    font-size: 15px;
    font-weight: 700;
    color: var(--ink);
  }
  .faq-icon {
    font-size: 14px;
    color: var(--ink-muted);
    transition: transform 0.3s ease;
    flex-shrink: 0;
  }
  .faq-item.open .faq-icon { transform: rotate(180deg); color: var(--primary); }
  .faq-a {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }
  .faq-item.open .faq-a { max-height: 300px; }
  .faq-a-inner {
    padding: 0 20px 18px 60px;
    font-size: 14px;
    color: var(--ink-soft);
    line-height: 1.8;
  }

  /* ===== CTA ===== */
  .cta-section { padding: 60px 0 80px; }
  .cta-card {
    background: linear-gradient(135deg, #3E7CB1 0%, #2A5C82 100%);
    border-radius: 24px;
    padding: 48px 56px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
    position: relative;
    overflow: hidden;
  }
  .cta-card::before {
    content: '';
    position: absolute;
    right: -60px;
    bottom: -80px;
    width: 220px;
    height: 220px;
    border-radius: 50%;
    background: rgba(255,255,255,0.06);
  }
  .cta-text h2 {
    font-size: 26px;
    font-weight: 800;
    color: #fff;
    margin-bottom: 8px;
  }
  .cta-text p {
    font-size: 15px;
    color: rgba(255,255,255,0.8);
  }

  /* ===== Footer ===== */
  .site-footer {
    background: var(--footer);
    color: #E7EDF3;
  }
  .site-footer .container { padding-top: 56px; padding-bottom: 32px; }
  .footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
    gap: 40px;
    margin-bottom: 36px;
  }
  .footer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 12px;
  }
  .footer-brand-name {
    font-size: 17px;
    font-weight: 800;
    color: #fff;
  }
  .footer-desc {
    font-size: 13px;
    color: #A8C6DF;
    line-height: 1.8;
  }
  .footer-title {
    font-size: 15px;
    font-weight: 700;
    color: #fff;
    margin-bottom: 16px;
  }
  .footer-links {
    list-style: none;
  }
  .footer-links li { margin-bottom: 10px; }
  .footer-links a {
    font-size: 14px;
    color: #A8C6DF;
    transition: var(--transition);
  }
  .footer-links a:hover { color: #fff; }
  .footer-contact {
    display: flex;
    flex-direction: column;
    gap: 12px;
  }
  .footer-contact span {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: #A8C6DF;
  }
  .footer-contact i { width: 18px; text-align: center; color: var(--primary); }
  .footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.08);
    padding-top: 20px;
    padding-bottom: 20px;
  }
  .footer-bottom span {
    font-size: 13px;
    color: #8297A8;
  }

  /* ===== Responsive ===== */
  @media (max-width: 1024px) {
    .split-layout { grid-template-columns: 1fr; }
    .split-side { position: static; margin-top: 32px; }
    .security-wrap { grid-template-columns: 1fr; gap: 32px; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
  }
  @media (max-width: 768px) {
    .container { padding-left: 16px; padding-right: 16px; }
    .section { padding: 56px 0; }
    .nav-card { padding: 8px 10px; }
    .logo-text { font-size: 13px; }
    .nav-menu { gap: 6px; }
    .nav-item { padding: 8px 12px; font-size: 13px; }
    .nav-item.active::after { left: 12px; right: 12px; }
    .btn-nav-small { display: none; }
    .nav-actions .btn-nav-small { display: none; }
    .page-hero { padding: 36px 0 32px; }
    .page-hero h1 { font-size: 26px; }
    .method-grid { grid-template-columns: 1fr; gap: 16px; }
    .security-grid { grid-template-columns: 1fr; }
    .cta-card { flex-direction: column; align-items: flex-start; padding: 32px 24px; }
    .cta-card .btn { width: 100%; }
    .footer-grid { grid-template-columns: 1fr; gap: 28px; }
    .timeline { padding-left: 56px; }
    .timeline-marker { left: -48px; width: 38px; height: 38px; font-size: 12px; }
    .timeline-content { padding: 16px 18px; }
    .timeline-head { flex-direction: column; align-items: flex-start; gap: 6px; }
  }
  @media (max-width: 520px) {
    .nav-menu {
      max-width: 100%;
      overflow-x: auto;
      -webkit-overflow-scrolling: touch;
    }
    .nav-item { flex-shrink: 0; }
    .nav-item i { display: none; }
    .nav-btn-icon { width: 36px; height: 36px; }
    .section-head h2 { font-size: 22px; }
    .page-hero h1 { font-size: 22px; }
    .back-links { flex-direction: column; }
    .timeline-list { flex-direction: column; gap: 6px; }
  }

/* roulang page: article */
/* ========== 设计变量 ========== */
:root {
    --primary: #3E7CB1;
    --primary-light: #EAF2F8;
    --primary-dark: #2C5F8A;
    --accent: #F08C3A;
    --accent-light: #FFF4E6;
    --accent-dark: #E07B28;
    --canvas: #F6F8FB;
    --surface: #FFFFFF;
    --text: #1F2A37;
    --text-sec: #5B6B7C;
    --text-muted: #9AA8B7;
    --border: #E3E9EF;
    --footer-bg: #13293D;
    --footer-text: #E7EDF3;
    --footer-sub: #8297A8;
    --footer-link: #A8C6DF;
    --radius-card: 16px;
    --radius-btn: 10px;
    --radius-tag: 6px;
    --radius-img: 20px;
    --radius-big: 24px;
    --shadow-card: 0 1px 2px rgba(16,24,40,0.05), 0 4px 12px rgba(16,24,40,0.04);
    --shadow-hover: 0 8px 24px rgba(16,24,40,0.09);
    --font-stack: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    --transition: 0.2s ease;
}

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

html { scroll-behavior: smooth; }

body {
    font-family: var(--font-stack);
    background: var(--canvas);
    color: var(--text);
    font-size: 16px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

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

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

ul, ol { list-style: none; }

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

input, textarea { font-family: inherit; }

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ========== 按钮 ========== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    border-radius: var(--radius-btn);
    font-size: 15px;
    font-weight: 600;
    line-height: 1.2;
    border: 1.5px solid transparent;
    text-decoration: none;
    transition: all var(--transition);
    white-space: nowrap;
    outline: none;
}
.btn:focus-visible {
    outline: 2px solid rgba(240, 140, 58, 0.6);
    outline-offset: 2px;
}
.btn-primary {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}
.btn-primary:hover {
    background: var(--accent-dark);
    border-color: var(--accent-dark);
    color: #fff;
    transform: translateY(-1px);
    box-shadow: var(--shadow-hover);
}
.btn-primary:active {
    transform: translateY(1px);
    box-shadow: none;
}
.btn-secondary {
    background: transparent;
    color: var(--primary);
    border-color: var(--primary);
}
.btn-secondary:hover {
    background: var(--primary-light);
    color: var(--primary);
    border-color: var(--primary);
    transform: translateY(-1px);
}
.btn-secondary:active {
    transform: translateY(0);
}
.btn-ghost {
    background: transparent;
    color: var(--text-sec);
    border-color: var(--border);
}
.btn-ghost:hover {
    background: var(--canvas);
    color: var(--text);
    border-color: var(--text-muted);
}
.btn-sm {
    padding: 8px 16px;
    font-size: 14px;
    border-radius: 8px;
}
.btn-lg {
    padding: 14px 32px;
    font-size: 16px;
}
.btn-nav-small {
    padding: 8px 18px;
    font-size: 14px;
}

/* ========== 顶部导航 ========== */
.site-nav {
    position: sticky;
    top: 0;
    z-index: 100;
    padding: 14px 0 6px;
    background: transparent;
}
.nav-card {
    background: var(--surface);
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-card);
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 10px 20px;
    gap: 16px;
    flex-wrap: nowrap;
}
.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
    text-decoration: none;
}
.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 16px;
    letter-spacing: -0.5px;
    flex-shrink: 0;
}
.logo-text {
    font-size: 17px;
    font-weight: 800;
    color: var(--text);
    white-space: nowrap;
    letter-spacing: 0.2px;
}
.nav-menu {
    display: flex;
    align-items: center;
    gap: 8px;
    flex: 1;
    justify-content: center;
    min-width: 0;
}
.nav-item {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 9px 16px;
    border-radius: 10px;
    background: #F1F5F8;
    font-size: 14px;
    color: var(--text-sec);
    text-decoration: none;
    transition: all var(--transition);
    font-weight: 500;
    position: relative;
    white-space: nowrap;
}
.nav-item i {
    font-size: 14px;
}
.nav-item:hover {
    background: var(--primary-light);
    color: var(--primary);
}
.nav-item.active {
    color: var(--primary);
    font-weight: 600;
    background: var(--primary-light);
}
.nav-item.active::after {
    content: '';
    position: absolute;
    bottom: 3px;
    left: 50%;
    transform: translateX(-50%);
    width: 20px;
    height: 2px;
    background: var(--primary);
    border-radius: 2px;
}
.nav-actions {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}
.nav-btn-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    border: 1.5px solid var(--border);
    background: var(--surface);
    color: var(--text-sec);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition);
}
.nav-btn-icon:hover {
    background: var(--primary-light);
    color: var(--primary);
    border-color: var(--primary);
}
.nav-btn-icon:focus-visible {
    outline: 2px solid rgba(240, 140, 58, 0.6);
    outline-offset: 2px;
}

/* ========== 面包屑 ========== */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 28px 0 20px;
    flex-wrap: wrap;
    font-size: 14px;
    color: var(--text-sec);
}
.breadcrumb a {
    color: var(--text-sec);
    text-decoration: none;
    transition: color var(--transition);
    padding: 6px 0;
}
.breadcrumb a:hover {
    color: var(--primary);
}
.breadcrumb-sep {
    color: var(--text-muted);
    font-size: 12px;
}
.breadcrumb-current {
    color: var(--text);
    font-weight: 600;
    max-width: 260px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ========== 文章卡片 ========== */
.article-card {
    background: var(--surface);
    border-radius: var(--radius-img);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-card);
    padding: 40px 48px;
    max-width: 860px;
    margin: 0 auto 48px;
}
.article-header {
    text-align: center;
    margin-bottom: 36px;
    border-bottom: 1px solid var(--border);
    padding-bottom: 32px;
}
.article-category-tag {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: var(--primary-light);
    color: var(--primary);
    font-size: 13px;
    font-weight: 600;
    padding: 6px 16px;
    border-radius: 999px;
    margin-bottom: 20px;
}
.article-category-tag i {
    font-size: 12px;
}
.article-title {
    font-size: 34px;
    font-weight: 800;
    line-height: 1.35;
    color: var(--text);
    margin-bottom: 20px;
    letter-spacing: 0.3px;
}
.article-meta {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 24px;
    font-size: 14px;
    color: var(--text-muted);
    flex-wrap: wrap;
}
.article-meta span {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.article-meta i {
    font-size: 13px;
}

/* ========== 正文排版 ========== */
.article-body {
    max-width: 720px;
    margin: 0 auto;
    font-size: 16px;
    line-height: 1.8;
    color: var(--text);
}
.article-body h2,
.article-body h3,
.article-body h4 {
    font-weight: 700;
    color: var(--text);
    margin: 36px 0 18px;
    line-height: 1.4;
}
.article-body h2 { font-size: 24px; }
.article-body h3 { font-size: 20px; }
.article-body h4 { font-size: 17px; }
.article-body p {
    margin-bottom: 22px;
    color: var(--text);
    line-height: 1.85;
    font-size: 16px;
}
.article-body a {
    color: var(--primary);
    text-decoration: underline;
    text-underline-offset: 3px;
}
.article-body a:hover {
    color: var(--primary-dark);
    text-decoration-thickness: 2px;
}
.article-body img {
    border-radius: var(--radius-img);
    max-width: 100%;
    height: auto;
    margin: 28px auto;
    box-shadow: var(--shadow-card);
    display: block;
}
.article-body blockquote {
    background: var(--primary-light);
    border-left: 4px solid var(--primary);
    padding: 16px 22px;
    border-radius: 0 12px 12px 0;
    margin: 28px 0;
    color: var(--text-sec);
    font-size: 15px;
    line-height: 1.75;
}
.article-body ul,
.article-body ol {
    margin: 20px 0 22px;
    padding-left: 24px;
}
.article-body ul { list-style: disc; }
.article-body ol { list-style: decimal; }
.article-body li {
    margin-bottom: 10px;
    line-height: 1.8;
}
.article-body code {
    background: var(--primary-light);
    color: var(--primary-dark);
    padding: 2px 8px;
    border-radius: 6px;
    font-size: 14px;
    font-family: "SF Mono", "Consolas", monospace;
}
.article-body pre {
    background: #1F2A37;
    color: #DCE6F0;
    padding: 20px 24px;
    border-radius: 14px;
    overflow-x: auto;
    margin: 24px 0;
    font-size: 14px;
    line-height: 1.7;
}
.article-body hr {
    border: 0;
    border-top: 1px solid var(--border);
    margin: 36px 0;
}
.article-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 24px 0;
    font-size: 14px;
}
.article-body th,
.article-body td {
    border: 1px solid var(--border);
    padding: 10px 14px;
    text-align: left;
}
.article-body th {
    background: var(--primary-light);
    font-weight: 600;
    color: var(--text);
}

/* ========== 文章未找到 ========== */
.article-not-found {
    text-align: center;
    padding: 80px 24px;
    max-width: 720px;
    margin: 0 auto;
}
.article-not-found i {
    font-size: 48px;
    color: var(--text-muted);
    margin-bottom: 20px;
}
.article-not-found p {
    font-size: 18px;
    color: var(--text-sec);
    margin-bottom: 24px;
}

/* ========== 文章底部操作 ========== */
.article-actions {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-top: 40px;
    padding-top: 28px;
    border-top: 1px solid var(--border);
    flex-wrap: wrap;
}

/* ========== 相关推荐 ========== */
.related-wrap {
    padding: 8px 0 56px;
}
.section-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 28px;
}
.section-head h2 {
    font-size: 24px;
    font-weight: 700;
    color: var(--text);
    position: relative;
    padding-left: 16px;
}
.section-head h2::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 22px;
    background: var(--accent);
    border-radius: 4px;
}
.section-link {
    font-size: 14px;
    color: var(--primary);
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 6px;
    transition: all var(--transition);
}
.section-link:hover {
    color: var(--primary-dark);
    gap: 10px;
}
.related-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}
.related-card {
    display: flex;
    flex-direction: column;
    background: var(--surface);
    border-radius: var(--radius-card);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-card);
    overflow: hidden;
    text-decoration: none;
    transition: all var(--transition);
}
.related-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-4px);
    border-color: rgba(62, 124, 177, 0.3);
}
.related-thumb {
    height: 160px;
    overflow: hidden;
    background: var(--primary-light);
}
.related-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}
.related-card:hover .related-thumb img {
    transform: scale(1.04);
}
.related-info {
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex: 1;
}
.related-info .tag {
    align-self: flex-start;
}
.related-info h3 {
    font-size: 16px;
    font-weight: 700;
    color: var(--text);
    line-height: 1.5;
    transition: color var(--transition);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.related-card:hover .related-info h3 {
    color: var(--primary);
}
.related-info p {
    font-size: 14px;
    color: var(--text-sec);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}
.related-time {
    font-size: 13px;
    color: var(--text-muted);
    margin-top: auto;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

/* ========== 标签 ========== */
.tag {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 12px;
    font-weight: 600;
    padding: 4px 12px;
    border-radius: var(--radius-tag);
    line-height: 1.6;
}
.tag-blue {
    background: var(--primary-light);
    color: var(--primary);
}
.tag-orange {
    background: var(--accent-light);
    color: var(--accent-dark);
}

/* ========== CTA 卡片 ========== */
.cta-card {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark) 90%);
    border-radius: var(--radius-big);
    padding: 48px 56px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
    margin-bottom: 64px;
    position: relative;
    overflow: hidden;
}
.cta-card::before {
    content: '';
    position: absolute;
    right: -40px;
    top: -60px;
    width: 180px;
    height: 180px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.08);
}
.cta-card::after {
    content: '';
    position: absolute;
    right: 40px;
    bottom: -50px;
    width: 100px;
    height: 100px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.04);
}
.cta-content {
    position: relative;
    z-index: 1;
}
.cta-content h2 {
    color: #fff;
    font-size: 26px;
    font-weight: 800;
    margin-bottom: 10px;
    line-height: 1.4;
}
.cta-content p {
    color: rgba(255, 255, 255, 0.85);
    font-size: 15px;
    line-height: 1.6;
}
.cta-btn-wrap {
    position: relative;
    z-index: 1;
    flex-shrink: 0;
}
.cta-card .btn-primary {
    background: #fff;
    color: var(--primary-dark);
    border-color: #fff;
    font-weight: 700;
}
.cta-card .btn-primary:hover {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
    transform: translateY(-2px);
}

/* ========== 页脚 ========== */
.site-footer {
    background: var(--footer-bg);
    color: var(--footer-text);
    margin-top: auto;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
    gap: 40px;
    padding: 56px 0 40px;
}
.footer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 14px;
}
.footer-brand .logo-icon {
    width: 36px;
    height: 36px;
    font-size: 14px;
}
.footer-brand-name {
    font-size: 18px;
    font-weight: 800;
    color: var(--footer-text);
}
.footer-desc {
    font-size: 14px;
    line-height: 1.75;
    color: var(--footer-sub);
    max-width: 280px;
}
.footer-title {
    font-size: 15px;
    font-weight: 700;
    color: var(--footer-text);
    margin-bottom: 16px;
}
.footer-links li {
    margin-bottom: 10px;
}
.footer-links a {
    color: var(--footer-link);
    font-size: 14px;
    text-decoration: none;
    transition: color var(--transition);
}
.footer-links a:hover {
    color: #fff;
}
.footer-contact {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.footer-contact span {
    font-size: 14px;
    color: var(--footer-sub);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}
.footer-contact i {
    color: var(--footer-link);
    width: 16px;
    text-align: center;
}
.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding: 20px 0;
    text-align: center;
}
.footer-bottom span {
    font-size: 13px;
    color: var(--footer-sub);
}

/* ========== 响应式 ========== */
@media screen and (max-width: 1023px) {
    .nav-menu {
        gap: 6px;
    }
    .nav-item {
        padding: 8px 12px;
    }
    .nav-item .fa-solid,
    .nav-item .fa-regular {
        display: none;
    }
    .related-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
    }
    .cta-card {
        padding: 36px 32px;
    }
    .article-card {
        padding: 32px 28px;
    }
}

@media screen and (max-width: 767px) {
    .container {
        padding: 0 16px;
    }
    .nav-card {
        padding: 8px 12px;
        gap: 8px;
        flex-wrap: wrap;
    }
    .nav-logo {
        gap: 6px;
    }
    .logo-icon {
        width: 34px;
        height: 34px;
        font-size: 13px;
    }
    .logo-text {
        font-size: 14px;
    }
    .nav-menu {
        order: 3;
        width: 100%;
        justify-content: flex-start;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
        scrollbar-width: none;
        padding: 4px 0;
        flex-wrap: nowrap;
    }
    .nav-menu::-webkit-scrollbar {
        display: none;
    }
    .nav-item {
        padding: 8px 14px;
        font-size: 13px;
        flex-shrink: 0;
    }
    .nav-item .fa-solid,
    .nav-item .fa-regular {
        display: inline-flex;
    }
    .nav-actions .btn-nav-small {
        padding: 8px 14px;
        font-size: 13px;
    }
    .breadcrumb {
        padding-top: 20px;
        font-size: 13px;
    }
    .breadcrumb-current {
        max-width: 180px;
    }
    .article-card {
        padding: 24px 18px;
        border-radius: var(--radius-card);
    }
    .article-title {
        font-size: 24px;
    }
    .article-meta {
        gap: 12px;
        font-size: 13px;
    }
    .article-body {
        font-size: 15px;
    }
    .article-body p {
        font-size: 15px;
    }
    .article-body h2 {
        font-size: 20px;
    }
    .article-body h3 {
        font-size: 18px;
    }
    .article-actions {
        flex-direction: column;
        align-items: stretch;
    }
    .article-actions .btn {
        width: 100%;
    }
    .related-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    .related-thumb {
        height: 180px;
    }
    .cta-card {
        flex-direction: column;
        align-items: flex-start;
        padding: 28px 24px;
        border-radius: var(--radius-card);
    }
    .cta-content h2 {
        font-size: 22px;
    }
    .cta-btn-wrap {
        width: 100%;
    }
    .cta-btn-wrap .btn {
        width: 100%;
    }
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 28px;
        padding: 40px 0 28px;
    }
    .footer-desc {
        max-width: 100%;
    }
}

/* roulang page: category2 */
:root {
  --primary: #3E7CB1;
  --primary-light: #EAF2F8;
  --primary-dark: #2C5F8A;
  --accent: #F08C3A;
  --accent-hover: #E07B28;
  --accent-light: #FFF4E6;
  --canvas: #F6F8FB;
  --surface: #FFFFFF;
  --text-main: #1F2A37;
  --text-sub: #5B6B7C;
  --text-muted: #9AA8B7;
  --border: #E3E9EF;
  --footer-bg: #13293D;
  --footer-text: #E7EDF3;
  --footer-sub: #8297A8;
  --radius-card: 16px;
  --radius-btn: 10px;
  --radius-tag: 6px;
  --radius-img: 20px;
  --radius-big: 24px;
  --shadow-card: 0 1px 2px rgba(16,24,40,0.05), 0 4px 12px rgba(16,24,40,0.04);
  --shadow-hover: 0 8px 24px rgba(16,24,40,0.09);
  --shadow-nav: 0 2px 16px rgba(16,24,40,0.08);
  --transition: 0.2s ease;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  background: var(--canvas);
  color: var(--text-main);
  font-size: 15px;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; transition: color var(--transition); }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.container-narrow { max-width: 880px; margin: 0 auto; padding: 0 24px; }
section { position: relative; }

/* ── 导航 ─────────────────────────── */
.site-nav { position: sticky; top: 12px; z-index: 100; padding-top: 0; }
.site-nav .container { padding: 0 16px; max-width: 1200px; }
.nav-card {
  display: flex; align-items: center; justify-content: space-between;
  background: var(--surface); border-radius: 16px; padding: 10px 20px;
  box-shadow: var(--shadow-nav); border: 1px solid rgba(227,233,239,0.8);
  gap: 16px; flex-wrap: wrap;
}
.nav-logo { display: flex; align-items: center; gap: 10px; text-decoration: none; min-width: 0; }
.logo-icon {
  width: 38px; height: 38px; border-radius: 10px; background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  display: inline-flex; align-items: center; justify-content: center; color: #fff; font-weight: 800; font-size: 15px;
  flex-shrink: 0; letter-spacing: 0.5px;
}
.logo-text { font-size: 15px; font-weight: 800; color: var(--text-main); white-space: nowrap; letter-spacing: 0.2px; }
.nav-menu { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.nav-item {
  display: inline-flex; align-items: center; gap: 6px; padding: 7px 14px;
  border-radius: 10px; background: #F1F5F8; color: var(--text-sub);
  font-size: 13.5px; font-weight: 600; transition: all var(--transition);
  position: relative;
}
.nav-item i { font-size: 13px; color: var(--text-muted); transition: color var(--transition); }
.nav-item:hover { background: var(--primary-light); color: var(--primary); }
.nav-item:hover i { color: var(--primary); }
.nav-item.active { background: var(--primary-light); color: var(--primary); font-weight: 700; }
.nav-item.active::after {
  content: ""; position: absolute; bottom: -1px; left: 50%; transform: translateX(-50%);
  width: 20px; height: 2px; background: var(--primary); border-radius: 2px;
}
.nav-actions { display: flex; align-items: center; gap: 10px; }
.nav-btn-icon {
  width: 36px; height: 36px; border-radius: 10px; background: #F1F5F8; color: var(--text-sub);
  display: inline-flex; align-items: center; justify-content: center; font-size: 14px; transition: all var(--transition);
}
.nav-btn-icon:hover { background: var(--primary-light); color: var(--primary); }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; border-radius: 10px; font-weight: 700; font-size: 14px; padding: 12px 24px; transition: all var(--transition); line-height: 1.4; }
.btn-primary { background: var(--accent) !important; color: #fff !important; border: none !important; }
.btn-primary:hover { background: var(--accent-hover) !important; transform: translateY(-1px); }
.btn-primary:active { transform: translateY(1px); }
.btn-outline { background: transparent; border: 1.5px solid var(--primary); color: var(--primary); }
.btn-outline:hover { background: var(--primary-light); border-color: var(--primary); }
.btn-sm { padding: 9px 18px; font-size: 13px; border-radius: 10px; }
.btn-white { background: #fff; color: var(--primary); border: none; }
.btn-white:hover { background: rgba(255,255,255,0.88); transform: translateY(-1px); }
.btn-white-outline { background: transparent; border: 1.5px solid rgba(255,255,255,0.85); color: #fff; }
.btn-white-outline:hover { background: rgba(255,255,255,0.12); }
.btn:focus, .nav-btn-icon:focus, .nav-item:focus { outline: 2px solid rgba(240,140,58,0.5); outline-offset: 2px; }

/* ── 面包屑 ────────────────────── */
.breadcrumb { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text-muted); margin-bottom: 24px; flex-wrap: wrap; }
.breadcrumb a { color: var(--primary); font-weight: 600; }
.breadcrumb a:hover { color: var(--accent); }
.breadcrumb .sep { color: var(--border); }

/* ── Hero 区 ─────────────────────── */
.hero-split {
  background: linear-gradient(180deg, #EDF4FA 0%, var(--canvas) 100%);
  padding: 56px 0 40px; overflow: hidden;
}
.hero-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 48px; align-items: center; }
.hero-copy { position: relative; z-index: 2; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px; background: var(--accent-light);
  padding: 6px 14px; border-radius: 999px; font-size: 12.5px; font-weight: 600; color: #D2721F; margin-bottom: 20px;
}
.hero-badge i { font-size: 11px; }
.hero-copy h1 { font-size: 36px; line-height: 1.3; font-weight: 800; color: var(--text-main); letter-spacing: 0.5px; }
.hero-copy h1 .hl { color: var(--primary); position: relative; }
.hero-copy h1 .hl::after {
  content: ""; position: absolute; left: 0; bottom: 4px; width: 100%; height: 8px;
  background: rgba(62,124,177,0.15); border-radius: 4px; z-index: -1;
}
.hero-desc { margin-top: 18px; font-size: 15px; color: var(--text-sub); line-height: 1.9; max-width: 460px; }
.hero-actions { display: flex; gap: 14px; margin-top: 30px; flex-wrap: wrap; }
.hero-trust { display: flex; gap: 24px; margin-top: 28px; flex-wrap: wrap; }
.trust-item { display: inline-flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text-sub); }
.trust-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); flex-shrink: 0; }
.hero-visual { position: relative; }
.hero-visual img { border-radius: var(--radius-img); box-shadow: var(--shadow-hover); width: 100%; height: 380px; object-fit: cover; }
.hero-float {
  position: absolute; top: 18px; right: 18px; background: var(--accent); color: #fff;
  font-size: 12px; font-weight: 700; padding: 7px 16px; border-radius: 999px;
  box-shadow: 0 4px 12px rgba(240,140,58,0.35); display: inline-flex; align-items: center; gap: 6px;
}
.hero-float i { font-size: 10px; }
.hero-card-note {
  position: absolute; bottom: 20px; left: 20px; background: rgba(19,41,61,0.78); color: #fff;
  padding: 10px 18px; border-radius: 12px; font-size: 12.5px; backdrop-filter: blur(6px);
  display: inline-flex; align-items: center; gap: 8px;
}

/* ── 时间线区 ───────────────────────── */
.timeline-section { padding: 72px 0 64px; }
.section-label { font-size: 13px; font-weight: 700; color: var(--primary); letter-spacing: 1px; text-transform: uppercase; margin-bottom: 8px; }
.section-title { font-size: 28px; font-weight: 800; color: var(--text-main); line-height: 1.35; margin-bottom: 12px; }
.section-sub { font-size: 14.5px; color: var(--text-sub); max-width: 560px; margin-bottom: 44px; }
.timeline-wrap { position: relative; }
.timeline-wrap::before {
  content: ""; position: absolute; left: 50%; top: 0; bottom: 0; width: 2px;
  background: linear-gradient(180deg, rgba(62,124,177,0.25), rgba(62,124,177,0.05)); transform: translateX(-50%);
}
.timeline-row { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; position: relative; margin-bottom: 44px; }
.timeline-row:last-child { margin-bottom: 0; }
.timeline-dot {
  position: absolute; left: 50%; top: 50%; transform: translate(-50%, -50%);
  width: 40px; height: 40px; border-radius: 50%; background: var(--primary-light); border: 3px solid var(--primary);
  display: flex; align-items: center; justify-content: center; color: var(--primary); font-weight: 800; font-size: 13px;
  z-index: 2; box-shadow: 0 0 0 4px rgba(62,124,177,0.12);
}
.timeline-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-card); padding: 26px 28px; box-shadow: var(--shadow-card); transition: all var(--transition); }
.timeline-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-2px); border-color: rgba(62,124,177,0.3); }
.timeline-card .num { font-size: 13px; color: var(--primary); font-weight: 800; letter-spacing: 1px; }
.timeline-card h3 { font-size: 18px; font-weight: 700; color: var(--text-main); margin: 8px 0 10px; }
.timeline-card p { font-size: 14px; color: var(--text-sub); line-height: 1.8; }
.timeline-card-img { border-radius: var(--radius-card); overflow: hidden; box-shadow: var(--shadow-card); }
.timeline-card-img img { width: 100%; height: 190px; object-fit: cover; transition: transform 0.3s ease; }
.timeline-card-img:hover img { transform: scale(1.03); }

/* ── 左右分栏区块 ─────────────────── */
.split-section { padding: 64px 0; background: var(--surface); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.split-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.split-visual { border-radius: var(--radius-img); overflow: hidden; box-shadow: var(--shadow-card); }
.split-visual img { width: 100%; height: 320px; object-fit: cover; }
.split-content .section-title { font-size: 24px; margin-bottom: 16px; }
.split-content .section-sub { margin-bottom: 24px; }
.check-list { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 12px; }
.check-list li { display: flex; gap: 10px; align-items: flex-start; font-size: 14px; color: var(--text-sub); }
.check-list li i { color: var(--primary); margin-top: 4px; font-size: 13px; flex-shrink: 0; }
.icon-box {
  width: 40px; height: 40px; border-radius: 12px; background: var(--primary-light); color: var(--primary);
  display: inline-flex; align-items: center; justify-content: center; font-size: 16px; margin-bottom: 14px;
}
.mini-tag { display: inline-flex; align-items: center; gap: 5px; background: var(--accent-light); color: #D2721F; font-size: 12px; font-weight: 600; padding: 4px 10px; border-radius: 999px; }

/* ── 安全提示区块 ─────────────────── */
.security-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.security-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-card); padding: 28px 22px; box-shadow: var(--shadow-card); transition: all var(--transition); }
.security-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-3px); border-color: rgba(62,124,177,0.3); }
.security-card .icon-box { margin-bottom: 14px; }
.security-card h3 { font-size: 16px; font-weight: 700; margin-bottom: 10px; }
.security-card p { font-size: 13.5px; color: var(--text-sub); line-height: 1.8; }

/* ── FAQ ──────────────────────────── */
.faq-section { padding: 72px 0; background: var(--canvas); }
.faq-wrap { max-width: 820px; margin: 0 auto; }
.faq-item { background: var(--surface); border: 1px solid var(--border); border-radius: 12px; margin-bottom: 14px; overflow: hidden; box-shadow: var(--shadow-card); transition: box-shadow var(--transition); }
.faq-item:hover { box-shadow: var(--shadow-hover); }
.faq-q { padding: 18px 24px; display: flex; align-items: center; gap: 14px; cursor: pointer; user-select: none; }
.faq-q .q-mark { width: 28px; height: 28px; border-radius: 8px; background: var(--primary-light); color: var(--primary); font-size: 13px; font-weight: 800; display: inline-flex; align-items: center; justify-content: center; flex-shrink: 0; }
.faq-q .q-text { flex: 1; font-size: 15px; font-weight: 700; color: var(--text-main); line-height: 1.5; }
.faq-q .q-icon { width: 24px; height: 24px; border-radius: 50%; background: #F1F5F8; display: inline-flex; align-items: center; justify-content: center; color: var(--text-muted); font-size: 12px; transition: all 0.3s ease; flex-shrink: 0; }
.faq-item.open .q-icon { transform: rotate(45deg); background: var(--accent-light); color: var(--accent); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height 0.35s ease; }
.faq-a-inner { padding: 0 24px 20px 66px; font-size: 14px; color: var(--text-sub); line-height: 1.85; border-top: 1px dashed var(--border); padding-top: 14px; margin-top: 2px; }

/* ── CTA 大卡 ─────────────────────── */
.cta-banner { padding: 56px 0; }
.cta-card {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  border-radius: var(--radius-big); padding: 44px 48px; display: flex; align-items: center; justify-content: space-between;
  gap: 32px; position: relative; overflow: hidden; box-shadow: 0 12px 40px rgba(44,95,138,0.24);
}
.cta-card::before {
  content: ""; position: absolute; right: -60px; bottom: -80px; width: 260px; height: 260px;
  background: rgba(255,255,255,0.06); border-radius: 50%;
}
.cta-card::after {
  content: ""; position: absolute; right: 80px; bottom: -140px; width: 200px; height: 200px;
  background: rgba(255,255,255,0.04); border-radius: 50%;
}
.cta-copy { position: relative; z-index: 2; }
.cta-copy h2 { color: #fff; font-size: 26px; font-weight: 800; margin-bottom: 10px; }
.cta-copy p { color: rgba(255,255,255,0.85); font-size: 14px; margin-bottom: 0; }
.cta-actions { position: relative; z-index: 2; display: flex; gap: 14px; flex-wrap: wrap; flex-shrink: 0; }

/* ── 页脚 ─────────────────────────── */
.site-footer { background: var(--footer-bg); color: var(--footer-sub); padding-top: 64px; }
.footer-grid { display: grid; grid-template-columns: 1.3fr 0.8fr 0.8fr 1.1fr; gap: 40px; padding-bottom: 48px; }
.footer-brand { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
.footer-brand-name { color: var(--footer-text); font-size: 16px; font-weight: 800; }
.footer-desc { font-size: 13.5px; line-height: 1.85; max-width: 260px; }
.footer-title { color: var(--footer-text); font-size: 15px; font-weight: 700; margin-bottom: 16px; }
.footer-links { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 10px; }
.footer-links a { color: #A8C6DF; font-size: 13.5px; transition: color var(--transition); }
.footer-links a:hover { color: #fff; }
.footer-contact { display: flex; flex-direction: column; gap: 12px; font-size: 13.5px; }
.footer-contact span { display: flex; align-items: center; gap: 10px; }
.footer-contact i { color: #A8C6DF; width: 16px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.08); padding: 20px 0; font-size: 12.5px; color: var(--footer-sub); }
.footer-bottom .container { display: flex; justify-content: center; align-items: center; }

/* ── 响应式 ─────────────────────────── */
@media (max-width: 1024px) {
  .hero-copy h1 { font-size: 30px; }
  .hero-visual img { height: 330px; }
  .security-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .container { padding: 0 16px; }
  .site-nav { top: 8px; }
  .nav-card { padding: 10px 14px; gap: 8px; }
  .logo-text { font-size: 13px; }
  .nav-menu { order: 3; width: 100%; display: flex; flex-wrap: nowrap; overflow-x: auto; padding-bottom: 4px; gap: 6px; -webkit-overflow-scrolling: touch; }
  .nav-item { flex-shrink: 0; font-size: 12.5px; padding: 6px 12px; }
  .nav-actions .btn-nav-small { padding: 7px 14px; font-size: 12px; }
  .nav-btn-icon { width: 32px; height: 32px; }
  .hero-split { padding: 40px 0 32px; }
  .hero-grid { grid-template-columns: 1fr; gap: 32px; }
  .hero-copy h1 { font-size: 26px; }
  .hero-visual img { height: 240px; }
  .hero-actions .btn { width: 100%; }
  .timeline-section { padding: 56px 0 48px; }
  .section-title { font-size: 22px; }
  .timeline-wrap::before { left: 20px; }
  .timeline-row { grid-template-columns: 1fr; gap: 20px; padding-left: 44px; }
  .timeline-dot { left: 20px; top: 24px; transform: translate(-50%, -50%); }
  .timeline-card { padding: 20px; }
  .split-grid { grid-template-columns: 1fr; gap: 32px; }
  .split-visual img { height: 220px; }
  .security-grid { grid-template-columns: 1fr 1fr; gap: 14px; }
  .security-card { padding: 20px 16px; }
  .faq-q { padding: 15px 18px; }
  .faq-a-inner { padding: 12px 18px 18px 60px; }
  .cta-banner { padding: 40px 0; }
  .cta-card { flex-direction: column; padding: 32px 24px; align-items: flex-start; }
  .cta-actions { width: 100%; }
  .cta-actions .btn { flex: 1; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom .container { flex-direction: column; gap: 6px; text-align: center; }
}
@media (max-width: 520px) {
  .nav-logo .logo-text { font-size: 12px; }
  .logo-icon { width: 32px; height: 32px; font-size: 13px; }
  .hero-copy h1 { font-size: 22px; }
  .hero-trust { gap: 14px; flex-direction: column; }
  .security-grid { grid-template-columns: 1fr; }
  .timeline-row { gap: 16px; }
  .faq-q { flex-wrap: wrap; }
}