/* roulang page: index */
:root {
  --primary: #1565D8;
  --primary-dark: #0E4FB0;
  --primary-soft: #E8F0FE;
  --accent: #FF6B2C;
  --accent-dark: #E0540F;
  --dark: #0B1E33;
  --dark-light: #132A44;
  --bg: #F5F7FA;
  --card: #FFFFFF;
  --text: #11243A;
  --text-secondary: #5B6C7F;
  --border: #DFE6EE;
  --radius: 16px;
  --radius-sm: 8px;
  --radius-btn: 48px;
  --shadow: 0 2px 12px rgba(11, 30, 51, 0.06);
  --shadow-hover: 0 8px 32px rgba(11, 30, 51, 0.12);
  --font: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font); font-size: 16px; line-height: 1.7; color: var(--text); background: var(--bg); overflow-x: hidden; }
img { max-width: 100%; height: auto; }
a { color: var(--primary); text-decoration: none; transition: color 0.2s ease; }
a:hover { color: var(--primary-dark); }
ul { list-style: none; padding: 0; margin: 0; }
.container { max-width: 1240px; padding-left: 20px; padding-right: 20px; margin: 0 auto; }
.btn { border-radius: var(--radius-btn); padding: 12px 28px; font-weight: 600; font-size: 16px; line-height: 1.5; transition: all 0.25s ease; }
.btn:focus-visible { outline: none; box-shadow: 0 0 0 3px rgba(21, 101, 216, 0.3); }
.btn-primary-custom { background: var(--primary); border: 1px solid var(--primary); color: #fff; }
.btn-primary-custom:hover, .btn-primary-custom:focus { background: var(--primary-dark); border-color: var(--primary-dark); color: #fff; box-shadow: 0 4px 16px rgba(21, 101, 216, 0.35); }
.btn-accent { background: var(--accent); border: 1px solid var(--accent); color: #fff; }
.btn-accent:hover, .btn-accent:focus { background: var(--accent-dark); border-color: var(--accent-dark); color: #fff; box-shadow: 0 4px 16px rgba(255, 107, 44, 0.35); }
.btn-outline-primary-custom { background: #fff; border: 1px solid var(--primary); color: var(--primary); }
.btn-outline-primary-custom:hover, .btn-outline-primary-custom:focus { background: var(--primary-soft); border-color: var(--primary); color: var(--primary-dark); box-shadow: none; }
.btn-block { width: 100%; }

/* ===== Topbar ===== */
.topbar { background: var(--dark); height: 36px; display: flex; align-items: center; }
.topbar-inner { display: flex; align-items: center; justify-content: space-between; width: 100%; max-width: 1240px; padding-left: 20px; padding-right: 20px; margin: 0 auto; gap: 16px; }
.topbar-domain { font-family: 'SFMono-Regular', 'Consolas', 'Menlo', monospace; font-size: 13px; font-weight: 600; color: rgba(255, 255, 255, 0.85); letter-spacing: 0.02em; }
.topbar-tip { font-size: 13px; color: rgba(255, 255, 255, 0.6); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; flex: 1; text-align: center; }
.topbar-contact { font-size: 13px; font-weight: 600; color: #fff; background: transparent; border: none; padding: 0; }
.topbar-contact:hover { text-decoration: underline; color: #fff; }

/* ===== Header / Nav ===== */
.navbar-main { background: #fff; position: sticky; top: 0; z-index: 1000; border-bottom: 1px solid var(--border); }
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 72px; max-width: 1240px; padding-left: 20px; padding-right: 20px; margin: 0 auto; }
.brand { display: flex; align-items: center; gap: 10px; }
.brand-icon { width: 32px; height: 32px; background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%); border-radius: 8px; display: inline-flex; align-items: center; justify-content: center; color: #fff; font-size: 18px; }
.brand:hover .brand-icon { box-shadow: 0 4px 12px rgba(21, 101, 216, 0.35); }
.brand-text { font-size: 20px; font-weight: 800; color: var(--text); letter-spacing: 0.02em; }
.brand:hover .brand-text { color: var(--primary); }
.nav-menu { display: flex; align-items: center; gap: 28px; }
.nav-links { display: flex; align-items: center; gap: 28px; }
.nav-link { font-size: 16px; font-weight: 500; color: var(--text-secondary); padding: 8px 0; position: relative; transition: color 0.2s ease; }
.nav-link::after { content: ''; position: absolute; left: 0; bottom: 2px; width: 100%; height: 2px; background: var(--primary); border-radius: 2px; transform: scaleX(0); transform-origin: center; transition: transform 0.25s ease; }
.nav-link:hover, .nav-link:focus { color: var(--primary); }
.nav-link:hover::after, .nav-link:focus::after, .nav-link.active::after { transform: scaleX(1); }
.nav-link.active { color: var(--primary); font-weight: 600; }
.nav-cta { padding: 10px 24px; font-size: 14px; }
.nav-toggle { display: none; background: none; border: none; width: 40px; height: 40px; position: relative; cursor: pointer; z-index: 1100; }
.nav-toggle span { display: block; width: 20px; height: 2px; background: var(--text); border-radius: 2px; margin: 5px auto; transition: all 0.3s ease; }
.nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===== Hero ===== */
.hero { background: linear-gradient(180deg, #E8F0FE 0%, #F5F7FA 100%); padding: 88px 0 96px; position: relative; overflow: hidden; }
.hero::before { content: ''; position: absolute; top: -80px; right: -80px; width: 300px; height: 300px; background: radial-gradient(circle, rgba(21, 101, 216, 0.08) 0%, transparent 70%); border-radius: 50%; pointer-events: none; }
.hero-inner { display: flex; align-items: center; gap: 48px; position: relative; z-index: 2; }
.hero-content { flex: 1; }
.hero-badge { display: inline-flex; align-items: center; gap: 6px; background: rgba(255, 255, 255, 0.8); border: 1px solid var(--border); border-radius: 48px; padding: 6px 16px; font-size: 13px; font-weight: 500; color: var(--primary); margin-bottom: 24px; box-shadow: 0 1px 4px rgba(11, 30, 51, 0.04); }
.hero h1 { font-size: 44px; font-weight: 800; line-height: 1.3; margin-bottom: 20px; color: var(--text); letter-spacing: 0.01em; }
.hero h1 .hl { color: var(--primary); }
.hero-subtitle { font-size: 18px; line-height: 1.7; color: var(--text-secondary); margin-bottom: 32px; max-width: 520px; }
.hero-actions { display: flex; align-items: center; gap: 16px; flex-wrap: wrap; }
.hero-link { font-size: 15px; font-weight: 600; color: var(--primary); padding: 10px 4px; border-bottom: 2px solid transparent; transition: all 0.2s ease; }
.hero-link:hover { border-bottom-color: var(--primary); color: var(--primary-dark); }
.hero-image { flex: 1; max-width: 560px; }
.hero-image img { width: 100%; aspect-ratio: 4/3; object-fit: cover; border-radius: var(--radius); box-shadow: var(--shadow-hover); display: block; }

/* ===== Section base ===== */
.section { padding: 88px 0; }
.section-head { margin-bottom: 48px; display: flex; align-items: flex-end; justify-content: space-between; gap: 24px; }
.section-label { display: inline-flex; align-items: center; gap: 8px; font-size: 14px; font-weight: 600; color: var(--primary); margin-bottom: 10px; letter-spacing: 0.02em; }
.section-label .icon { width: 24px; height: 24px; background: var(--primary-soft); border-radius: 6px; display: inline-flex; align-items: center; justify-content: center; font-size: 13px; }
.section-title { font-size: 32px; font-weight: 800; line-height: 1.4; color: var(--text); margin: 0; }
.section-desc { font-size: 16px; color: var(--text-secondary); margin-top: 12px; max-width: 640px; }
.section-link { font-size: 15px; font-weight: 600; color: var(--primary); white-space: nowrap; padding: 8px 0; border-bottom: 2px solid transparent; transition: all 0.2s ease; }
.section-link:hover { border-bottom-color: var(--primary); color: var(--primary-dark); }

/* ===== Solution Cards ===== */
.solution-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.solution-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 32px 28px; box-shadow: var(--shadow); transition: all 0.3s ease; position: relative; overflow: hidden; }
.solution-card::before { content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px; background: var(--accent); transform: scaleX(0); transform-origin: left; transition: transform 0.35s ease; }
.solution-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-hover); border-color: rgba(21, 101, 216, 0.2); }
.solution-card:hover::before { transform: scaleX(1); }
.solution-icon { width: 48px; height: 48px; background: var(--primary-soft); border-radius: 12px; display: flex; align-items: center; justify-content: center; font-size: 22px; color: var(--primary); margin-bottom: 20px; transition: all 0.3s ease; }
.solution-card:hover .solution-icon { background: var(--primary); color: #fff; }
.solution-card h3 { font-size: 18px; font-weight: 600; color: var(--text); margin-bottom: 12px; line-height: 1.5; }
.solution-card p { font-size: 14px; line-height: 1.7; color: var(--text-secondary); margin-bottom: 20px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.solution-card a { font-size: 14px; font-weight: 600; color: var(--primary); transition: all 0.2s ease; }
.solution-card a:hover { color: var(--accent); }

/* ===== Stats ===== */
.stats-section { background: var(--dark); padding: 56px 0; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); }
.stats-item { text-align: center; padding: 16px 12px; position: relative; }
.stats-item + .stats-item::before { content: ''; position: absolute; left: 0; top: 20%; bottom: 20%; width: 1px; background: rgba(255, 255, 255, 0.1); }
.stats-number { font-size: 40px; font-weight: 800; color: #fff; display: flex; align-items: center; justify-content: center; gap: 2px; line-height: 1.2; }
.stats-number sup { font-size: 28px; font-weight: 700; color: var(--accent); top: 0; }
.stats-label { font-size: 14px; color: rgba(255, 255, 255, 0.6); margin-top: 6px; display: block; }

/* ===== News Section ===== */
.news-section { background: var(--bg); }
.news-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.news-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); box-shadow: var(--shadow); display: flex; overflow: hidden; height: 100%; transition: all 0.3s ease; }
.news-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-2px); border-color: rgba(21, 101, 216, 0.2); }
.news-thumb { flex: 0 0 180px; max-width: 180px; overflow: hidden; }
.news-thumb img { width: 100%; height: 100%; object-fit: cover; display: block; aspect-ratio: 4/3; }
.news-body { padding: 20px 22px; flex: 1; display: flex; flex-direction: column; }
.badge-cat { display: inline-block; background: var(--primary-soft); color: var(--primary); font-size: 12px; font-weight: 600; border-radius: 6px; padding: 4px 10px; margin-bottom: 10px; width: fit-content; }
.news-title { font-size: 17px; font-weight: 600; color: var(--text); line-height: 1.5; margin-bottom: 8px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; transition: color 0.2s ease; }
.news-card:hover .news-title { color: var(--primary); }
.news-summary { font-size: 14px; line-height: 1.6; color: var(--text-secondary); margin-bottom: 12px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; flex: 1; }
.news-meta { display: flex; align-items: center; justify-content: space-between; border-top: 1px solid var(--border); padding-top: 10px; }
.news-time { font-size: 12px; color: var(--text-secondary); display: inline-flex; align-items: center; gap: 5px; }
.news-more { font-size: 13px; font-weight: 600; color: var(--primary); transition: color 0.2s ease; }
.news-card:hover .news-more { color: var(--accent); }
.news-empty { background: var(--card); border: 1px dashed var(--border); border-radius: var(--radius); padding: 48px 24px; text-align: center; grid-column: 1 / -1; }
.news-empty .empty-icon { font-size: 48px; color: #CBD5E0; margin-bottom: 12px; }
.news-empty p { font-size: 14px; color: var(--text-secondary); }

/* ===== FAQ ===== */
.faq-section { background: var(--card); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.faq-list { max-width: 860px; margin: 0 auto; }
.faq-item { border-bottom: 1px solid var(--border); position: relative; transition: all 0.3s ease; }
.faq-item:last-child { border-bottom: none; }
.faq-item.active { background: rgba(232, 240, 254, 0.3); border-radius: 12px; margin-left: -16px; margin-right: -16px; padding-left: 16px; padding-right: 16px; }
.faq-item.active::before { content: ''; position: absolute; left: 0; top: 16px; bottom: 16px; width: 3px; background: var(--primary); border-radius: 3px; }
.faq-question { width: 100%; background: none; border: none; font-size: 16px; font-weight: 600; color: var(--text); padding: 18px 40px 18px 0; display: flex; justify-content: space-between; align-items: center; text-align: left; cursor: pointer; transition: color 0.2s ease; position: relative; }
.faq-question:hover, .faq-question:focus-visible { color: var(--primary); }
.faq-question:focus-visible { outline: none; }
.faq-icon { width: 28px; height: 28px; background: var(--primary-soft); border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 14px; color: var(--primary); flex-shrink: 0; transition: all 0.35s ease; position: absolute; right: 0; top: 50%; transform: translateY(-50%); }
.faq-item.active .faq-icon { background: var(--primary); color: #fff; transform: translateY(-50%) rotate(45deg); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.35s ease, padding 0.25s ease; padding: 0 24px; }
.faq-item.active .faq-answer { max-height: 300px; padding-bottom: 18px; }
.faq-answer p { font-size: 14px; color: var(--text-secondary); line-height: 1.7; }

/* ===== CTA ===== */
.cta-section { background: linear-gradient(135deg, #E8F0FE 0%, #F0F5FD 60%, #EAF2FD 100%); padding: 72px 0; }
.cta-inner { display: flex; align-items: center; justify-content: space-between; gap: 32px; flex-wrap: wrap; }
.cta-title { font-size: 26px; font-weight: 800; color: var(--text); margin: 0 0 8px; }
.cta-desc { font-size: 15px; color: var(--text-secondary); max-width: 520px; }

/* ===== Footer ===== */
.footer { background: var(--dark); padding: 56px 0 24px; color: rgba(255, 255, 255, 0.7); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.4fr; gap: 40px; margin-bottom: 40px; }
.footer-brand .brand { margin-bottom: 16px; }
.footer-brand .brand-text { color: #fff; }
.footer-brand .brand:hover .brand-text { color: var(--accent); }
.footer-desc { font-size: 14px; line-height: 1.7; color: rgba(255, 255, 255, 0.5); max-width: 260px; }
.footer-social { display: flex; gap: 10px; margin-top: 20px; }
.footer-social a { width: 36px; height: 36px; border-radius: 8px; background: rgba(255, 255, 255, 0.08); display: inline-flex; align-items: center; justify-content: center; color: rgba(255, 255, 255, 0.6); font-size: 15px; transition: all 0.25s ease; }
.footer-social a:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }
.footer h4 { font-size: 16px; font-weight: 600; color: #fff; margin-bottom: 16px; }
.footer-links li { margin-bottom: 8px; }
.footer-links a { font-size: 14px; color: rgba(255, 255, 255, 0.5); transition: all 0.2s ease; }
.footer-links a:hover { color: #fff; padding-left: 4px; }
.footer-contact li { font-size: 14px; color: rgba(255, 255, 255, 0.5); display: flex; align-items: flex-start; gap: 8px; margin-bottom: 12px; line-height: 1.6; }
.footer-contact li i { color: var(--accent); margin-top: 3px; }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, 0.1); padding-top: 20px; text-align: center; }
.footer-bottom p { font-size: 13px; color: rgba(255, 255, 255, 0.4); }
.footer-bottom a { color: rgba(255, 255, 255, 0.5); transition: color 0.2s ease; }
.footer-bottom a:hover { color: #fff; }

/* ===== Modal ===== */
.modal-dialog.custom { max-width: 480px; }
.modal-content { border-radius: 20px; border: none; box-shadow: 0 16px 48px rgba(11, 30, 51, 0.15); overflow: hidden; }
.modal-header { border-bottom: 1px solid var(--border); padding: 20px 28px; }
.modal-title { font-size: 18px; font-weight: 700; color: var(--text); }
.btn-close-custom { width: 32px; height: 32px; border-radius: 50%; background: var(--bg); border: none; font-size: 14px; color: var(--text-secondary); display: flex; align-items: center; justify-content: center; cursor: pointer; transition: all 0.2s ease; }
.btn-close-custom:hover { background: var(--accent); color: #fff; }
.modal-body { padding: 24px 28px; }
.modal-body label { font-size: 14px; font-weight: 600; color: var(--text); margin-bottom: 6px; display: block; }
.modal-body .form-control, .modal-body .form-select { border-radius: 10px; border: 1px solid #D5DEE8; height: 44px; font-size: 14px; transition: all 0.2s ease; }
.modal-body .form-control:focus, .modal-body .form-select:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(21, 101, 216, 0.12); outline: none; }
.modal-body textarea.form-control { height: auto; min-height: 80px; resize: vertical; }
.modal-body .btn { margin-top: 8px; }
.privacy-note { font-size: 12px; color: #6B7A8C; text-align: center; margin-top: 12px; line-height: 1.5; }

/* ===== Responsive ===== */
@media (max-width: 991.98px) {
  .nav-toggle { display: block; }
  .nav-menu { position: fixed; top: 108px; left: 0; right: 0; background: #fff; flex-direction: column; align-items: center; gap: 0; padding: 24px 20px 32px; box-shadow: 0 12px 32px rgba(11, 30, 51, 0.12); border-bottom: 1px solid var(--border); transform: translateY(-150%); transition: transform 0.35s ease; z-index: 1050; }
  .nav-menu.active { transform: translateY(0); }
  .nav-links { flex-direction: column; gap: 0; width: 100%; text-align: center; }
  .nav-links .nav-link { display: block; font-size: 20px; font-weight: 600; color: var(--text); padding: 14px 0; width: 100%; }
  .nav-links .nav-link::after { display: none; }
  .nav-links .nav-link:hover, .nav-links .nav-link.active { color: var(--primary); background: var(--primary-soft); border-radius: 8px; }
  .nav-cta { margin-top: 24px; width: 100%; text-align: center; }
  .hero { padding: 64px 0 72px; }
  .hero-inner { flex-direction: column; gap: 40px; }
  .hero h1 { font-size: 32px; }
  .hero-image { max-width: 100%; order: 2; }
  .solution-cards { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .news-grid { grid-template-columns: 1fr; }
  .section { padding: 64px 0; }
  .section-title { font-size: 26px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-item:nth-child(3)::before { display: none; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); gap: 32px; }
  .cta-inner { flex-direction: column; text-align: center; }
  .cta-desc { margin: 0 auto; }
}
@media (max-width: 575.98px) {
  .topbar-tip { display: none; }
  .topbar-inner { padding-left: 16px; padding-right: 16px; }
  .container { padding-left: 16px; padding-right: 16px; }
  .hero { padding: 48px 0 56px; }
  .hero h1 { font-size: 28px; }
  .hero-subtitle { font-size: 16px; }
  .hero-actions { flex-direction: column; align-items: flex-start; gap: 12px; width: 100%; }
  .hero-actions .btn { width: 100%; text-align: center; }
  .solution-cards { grid-template-columns: 1fr; }
  .news-card { flex-direction: column; }
  .news-thumb { flex: none; max-width: none; width: 100%; }
  .news-thumb img { width: 100%; aspect-ratio: 16/9; }
  .news-meta { flex-direction: column; align-items: flex-start; gap: 8px; }
  .section { padding: 56px 0; }
  .section-head { flex-direction: column; align-items: flex-start; gap: 12px; }
  .stats-number { font-size: 32px; }
  .stats-label { font-size: 13px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom p { font-size: 12px; }
  .cta-title { font-size: 22px; }
  .nav-menu { top: 108px; }
  .faq-question { font-size: 15px; padding: 16px 36px 16px 0; }
}

/* roulang page: article */
:root {
  --primary: #1565D8;
  --primary-dark: #0E4FB0;
  --primary-soft: #E8F0FE;
  --accent: #FF6B2C;
  --accent-dark: #E0540F;
  --dark: #0B1E33;
  --bg: #F5F7FA;
  --card: #FFFFFF;
  --text: #11243A;
  --text-secondary: #5B6C7F;
  --border: #DFE6EE;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow-sm: 0 2px 12px rgba(11,30,51,0.06);
  --shadow-hover: 0 8px 32px rgba(11,30,51,0.12);
  --transition: all 0.3s ease;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif; background: var(--bg); color: var(--text); font-size: 16px; line-height: 1.7; -webkit-font-smoothing: antialiased; }
img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: var(--primary); transition: var(--transition); }
a:hover { color: var(--primary-dark); }
ul, ol { list-style: none; padding: 0; }
.container { max-width: 1240px; padding-left: 20px; padding-right: 20px; }
.btn { border-radius: 48px; padding: 12px 28px; font-weight: 600; font-size: 15px; transition: var(--transition); }
.btn:focus, .btn:focus-visible { outline: none; box-shadow: 0 0 0 3px rgba(21,101,216,0.3); }
.btn-primary-custom { background: var(--primary); color: #fff; border: 1px solid var(--primary); }
.btn-primary-custom:hover, .btn-primary-custom:focus { background: var(--primary-dark); border-color: var(--primary-dark); color: #fff; box-shadow: 0 4px 16px rgba(21,101,216,0.35); }
.btn-outline-custom { background: transparent; color: var(--primary); border: 1px solid var(--primary); }
.btn-outline-custom:hover { background: var(--primary-soft); color: var(--primary-dark); border-color: var(--primary-dark); }
.btn-accent-custom { background: var(--accent); color: #fff; border: 1px solid var(--accent); }
.btn-accent-custom:hover { background: var(--accent-dark); border-color: var(--accent-dark); color: #fff; box-shadow: 0 4px 16px rgba(255,107,44,0.3); }

/* ===== 顶部信息条 ===== */
.topbar { background: var(--dark); height: 36px; display: flex; align-items: center; color: #fff; font-size: 13px; }
.topbar .container { display: flex; justify-content: space-between; align-items: center; gap: 16px; }
.topbar-domain { font-family: 'SF Mono', 'Consolas', monospace; font-weight: 600; letter-spacing: 0.02em; color: rgba(255,255,255,0.9); }
.topbar-tip { color: rgba(255,255,255,0.65); font-size: 13px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.topbar-link { color: #fff; font-weight: 500; font-size: 13px; border-bottom: 1px solid transparent; padding-bottom: 1px; white-space: nowrap; }
.topbar-link:hover { color: var(--accent); border-bottom-color: var(--accent); }
@media (max-width: 575px) {
  .topbar-tip { display: none; }
}

/* ===== 主导航 ===== */
.navbar-main { background: #fff; border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 1000; padding: 0; min-height: 72px; }
.navbar-main .container { max-width: 1240px; }
.nav-inner { display: flex; align-items: center; justify-content: space-between; min-height: 72px; }
.brand { display: inline-flex; align-items: center; gap: 10px; }
.brand-icon { width: 32px; height: 32px; display: inline-flex; align-items: center; justify-content: center; background: var(--primary-soft); color: var(--primary); border-radius: 8px; font-size: 18px; }
.brand-text { font-size: 20px; font-weight: 700; color: var(--text); letter-spacing: 0.01em; transition: var(--transition); }
.brand:hover .brand-text { color: var(--primary); }
.nav-menu { display: flex; align-items: center; gap: 32px; }
.nav-links { display: flex; align-items: center; gap: 28px; margin: 0; padding: 0; }
.nav-link { font-size: 16px; color: #5B6C7F; font-weight: 500; padding: 8px 0; border-bottom: 2px solid transparent; margin-bottom: -1px; transition: var(--transition); }
.nav-link:hover { color: var(--primary); border-bottom-color: var(--primary); }
.nav-link.active { color: var(--primary); border-bottom-color: var(--primary); font-weight: 600; }
.nav-cta { margin-left: 8px; padding: 10px 24px; font-size: 15px; }
.nav-toggle { display: none; background: transparent; border: none; cursor: pointer; width: 42px; height: 42px; padding: 10px; flex-direction: column; gap: 5px; align-items: center; justify-content: center; border-radius: 8px; transition: var(--transition); }
.nav-toggle:hover { background: var(--primary-soft); }
.nav-toggle span { width: 22px; height: 2px; background: var(--text); border-radius: 2px; transition: var(--transition); }
@media (max-width: 991px) {
  .nav-toggle { display: inline-flex; }
  .nav-menu { position: fixed; top: 108px; left: 0; right: 0; background: #fff; padding: 24px 20px 32px; flex-direction: column; align-items: flex-start; gap: 8px; transform: translateY(-12px); opacity: 0; visibility: hidden; box-shadow: 0 12px 32px rgba(11,30,51,0.12); border-bottom: 1px solid var(--border); transition: var(--transition); z-index: 999; border-radius: 0 0 16px 16px; }
  .nav-menu.open { transform: translateY(0); opacity: 1; visibility: visible; }
  .nav-links { flex-direction: column; align-items: stretch; gap: 4px; width: 100%; }
  .nav-link { display: block; padding: 14px 8px; font-size: 18px; border-bottom: 1px solid var(--border); border-radius: 0; margin: 0; }
  .nav-link:hover { border-bottom-color: var(--border); background: var(--primary-soft); color: var(--primary); }
  .nav-link.active { border-bottom-color: var(--primary); background: var(--primary-soft); }
  .nav-cta { width: 100%; text-align: center; margin-top: 16px; }
}

/* ===== 面包屑 ===== */
.breadcrumb-bar { background: #F5F7FA; padding: 16px 0; border-bottom: 1px solid var(--border); }
.breadcrumb-custom { font-size: 14px; color: var(--text-secondary); display: flex; align-items: center; flex-wrap: wrap; gap: 6px; }
.breadcrumb-custom a { color: var(--text-secondary); }
.breadcrumb-custom a:hover { color: var(--primary); }
.breadcrumb-custom .separator { color: #B0B8C4; }
.breadcrumb-custom .current { color: var(--primary); font-weight: 500; }

/* ===== 文章页主体 ===== */
.article-main { padding: 48px 0 72px; }
.article-header { max-width: 860px; margin: 0 auto 40px; text-align: center; }
.article-header h1 { font-size: 32px; font-weight: 700; line-height: 1.4; color: var(--text); margin: 16px 0 20px; letter-spacing: 0.01em; }
@media (min-width: 768px) { .article-header h1 { font-size: 36px; } }
.article-meta { display: flex; align-items: center; justify-content: center; gap: 16px; flex-wrap: wrap; font-size: 14px; color: var(--text-secondary); }
.article-meta .badge-cat { background: var(--primary-soft); color: var(--primary); font-size: 13px; font-weight: 600; padding: 4px 14px; border-radius: 6px; }
.article-meta .meta-icon { margin-right: 4px; color: var(--text-secondary); opacity: 0.7; }
.article-cover { max-width: 860px; margin: 0 auto 36px; border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow-sm); }
.article-cover img { width: 100%; aspect-ratio: 16 / 8; object-fit: cover; }
.article-content { max-width: 780px; margin: 0 auto; font-size: 16px; line-height: 1.8; color: var(--text); }
.article-content p { margin-bottom: 24px; }
.article-content h2 { font-size: 26px; font-weight: 700; margin: 48px 0 20px; color: var(--text); padding-bottom: 12px; position: relative; }
.article-content h2::after { content: ''; position: absolute; bottom: 0; left: 0; width: 48px; height: 3px; background: var(--primary); border-radius: 2px; }
.article-content h3 { font-size: 22px; font-weight: 600; margin: 36px 0 16px; color: var(--text); }
.article-content img { border-radius: 12px; margin: 28px 0; box-shadow: var(--shadow-sm); }
.article-content blockquote { border-left: 3px solid var(--primary); background: var(--primary-soft); padding: 20px 24px; border-radius: 0 12px 12px 0; margin: 28px 0; color: var(--text-secondary); font-size: 15px; }
.article-content ul, .article-content ol { margin-bottom: 24px; padding-left: 24px; }
.article-content ul li, .article-content ol li { margin-bottom: 8px; position: relative; }
.article-content ul li::before { content: ''; position: absolute; left: -16px; top: 12px; width: 6px; height: 6px; background: var(--primary); border-radius: 50%; }
.article-content code { background: #F0F3F7; padding: 3px 8px; border-radius: 6px; font-size: 14px; font-family: 'SF Mono', 'Consolas', monospace; color: var(--primary-dark); }
.article-content pre { background: #F0F3F7; padding: 24px; border-radius: 12px; overflow-x: auto; margin-bottom: 24px; border: 1px solid var(--border); }
.article-content pre code { background: transparent; padding: 0; border-radius: 0; }
.article-content table { width: 100%; margin: 28px 0; border-collapse: collapse; font-size: 15px; border-radius: 12px; overflow: hidden; }
.article-content table th { background: var(--primary); color: #fff; padding: 14px 16px; text-align: left; font-weight: 600; }
.article-content table td { padding: 12px 16px; border-bottom: 1px solid var(--border); }
.article-content table tr:nth-child(even) td { background: #F8FAFC; }
.article-content table tr:hover td { background: var(--primary-soft); }

/* 文章端部分隔 */
.article-divider { max-width: 780px; margin: 56px auto 32px; border-top: 1px solid var(--border); position: relative; }
.article-divider::after { content: ''; position: absolute; top: -4px; left: 50%; transform: translateX(-50%); width: 8px; height: 8px; background: var(--primary); border-radius: 50%; }

/* ===== 相关推荐 ===== */
.related-section { max-width: 1000px; margin: 60px auto 0; }
.related-section .section-title { font-size: 22px; font-weight: 700; margin-bottom: 24px; text-align: center; color: var(--text); }
.related-grid { display: grid; grid-template-columns: 1fr; gap: 24px; }
@media (min-width: 768px) { .related-grid { grid-template-columns: repeat(3, 1fr); } }
.related-card { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; padding: 24px; box-shadow: var(--shadow-sm); transition: var(--transition); cursor: pointer; }
.related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); border-color: transparent; }
.related-card .card-cat { font-size: 12px; color: var(--primary); background: var(--primary-soft); padding: 3px 12px; border-radius: 6px; font-weight: 600; display: inline-block; margin-bottom: 12px; }
.related-card .card-title { font-size: 16px; font-weight: 600; color: var(--text); margin-bottom: 8px; line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.related-card .card-excerpt { font-size: 14px; color: var(--text-secondary); line-height: 1.6; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.related-card .card-date { font-size: 12px; color: #B0B8C4; margin-top: 12px; display: flex; align-items: center; gap: 6px; }
.related-card:hover .card-title { color: var(--primary); }

/* ===== 文章空态 ===== */
.article-empty { max-width: 720px; margin: 80px auto; text-align: center; padding: 64px 32px; background: #fff; border-radius: var(--radius); border: 1px dashed var(--border); }
.article-empty .empty-icon { width: 64px; height: 64px; background: var(--primary-soft); border-radius: 16px; display: inline-flex; align-items: center; justify-content: center; font-size: 28px; color: var(--primary); margin-bottom: 20px; }
.article-empty h3 { font-size: 22px; font-weight: 600; color: var(--text); margin-bottom: 12px; }
.article-empty p { font-size: 14px; color: var(--text-secondary); margin-bottom: 24px; }

/* ===== CTA ===== */
.article-cta { background: linear-gradient(135deg, #E8F0FE 0%, #F5F7FA 100%); border-radius: 20px; max-width: 1000px; margin: 60px auto 0; padding: 48px 40px; display: flex; flex-direction: column; align-items: center; gap: 20px; text-align: center; border: 1px solid rgba(21,101,216,0.1); }
@media (min-width: 768px) { .article-cta { flex-direction: row; justify-content: space-between; text-align: left; padding: 40px 48px; } }
.article-cta h3 { font-size: 24px; font-weight: 700; color: var(--text); margin-bottom: 8px; }
.article-cta p { font-size: 14px; color: var(--text-secondary); margin: 0; }

/* ===== 页脚 ===== */
.footer { background: var(--dark); padding: 56px 0 24px; color: rgba(255,255,255,0.75); margin-top: 0; }
.footer .brand-text { color: #fff; }
.footer .brand-icon { background: rgba(255,255,255,0.12); color: var(--accent); }
.footer-grid { display: grid; grid-template-columns: 1fr; gap: 32px; margin-bottom: 48px; }
@media (min-width: 768px) { .footer-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 992px) { .footer-grid { grid-template-columns: 2fr 1fr 1fr 1.2fr; gap: 48px; } }
.footer .footer-brand p { font-size: 14px; color: rgba(255,255,255,0.55); line-height: 1.7; margin: 16px 0 20px; }
.footer .footer-social { display: flex; gap: 12px; }
.footer .footer-social a { width: 36px; height: 36px; border-radius: 50%; background: rgba(255,255,255,0.08); display: inline-flex; align-items: center; justify-content: center; color: rgba(255,255,255,0.75); font-size: 15px; transition: var(--transition); }
.footer .footer-social a:hover { background: var(--accent); color: #fff; transform: translateY(-2px); }
.footer h4 { color: #fff; font-size: 15px; font-weight: 600; margin-bottom: 16px; position: relative; padding-bottom: 10px; }
.footer h4::after { content: ''; position: absolute; bottom: 0; left: 0; width: 24px; height: 2px; background: var(--accent); border-radius: 2px; }
.footer .footer-links li, .footer .footer-contact li { margin-bottom: 10px; }
.footer .footer-links a { color: rgba(255,255,255,0.6); font-size: 14px; transition: var(--transition); }
.footer .footer-links a:hover { color: #fff; padding-left: 6px; }
.footer .footer-contact li { display: flex; align-items: flex-start; gap: 10px; font-size: 14px; color: rgba(255,255,255,0.6); }
.footer .footer-contact i { color: var(--accent); margin-top: 4px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding-top: 24px; text-align: center; }
.footer-bottom p { font-size: 13px; color: rgba(255,255,255,0.5); margin: 0; }
.footer-bottom a { color: rgba(255,255,255,0.6); }
.footer-bottom a:hover { color: #fff; }

/* ===== Modal 定制 ===== */
.modal-content { border-radius: 20px; border: none; box-shadow: 0 20px 60px rgba(11,30,51,0.2); overflow: hidden; }
.modal-header { border-bottom: 1px solid var(--border); padding: 20px 24px; }
.modal-title { font-size: 20px; font-weight: 700; color: var(--text); }
.modal-body { padding: 28px 24px; }
.modal-footer { border-top: none; padding: 0 24px 24px; }
.form-label { font-size: 14px; font-weight: 500; color: var(--text); margin-bottom: 6px; }
.form-control, .form-select { height: 44px; border-radius: 10px; border: 1px solid #D5DEE8; font-size: 14px; padding: 10px 14px; transition: var(--transition); background: #F8FAFC; }
.form-control:focus, .form-select:focus { border-color: var(--primary); box-shadow: 0 0 0 2px rgba(21,101,216,0.15); background: #fff; }
textarea.form-control { height: auto; min-height: 90px; resize: vertical; }
.modal .btn-close { background: transparent; border: none; width: 32px; height: 32px; border-radius: 50%; display: inline-flex; align-items: center; justify-content: center; font-size: 18px; color: var(--text-secondary); transition: var(--transition); opacity: 1; }
.modal .btn-close:hover { background: var(--primary-soft); color: var(--primary); transform: rotate(90deg); }
.privacy-note { font-size: 12px; color: #6B7A8C; text-align: center; margin-top: 12px; line-height: 1.6; }
.modal-backdrop.show { opacity: 0.5; }

/* ===== 响应式调整 ===== */
@media (max-width: 575px) {
  .container { padding-left: 16px; padding-right: 16px; }
  .article-header h1 { font-size: 26px; }
  .article-content { font-size: 15px; }
  .article-content h2 { font-size: 22px; }
  .article-content h3 { font-size: 19px; }
  .article-cta { padding: 32px 24px; }
  .article-cta h3 { font-size: 20px; }
  .related-grid { grid-template-columns: 1fr; }
}
@media (min-width: 576px) and (max-width: 767px) {
  .related-grid { grid-template-columns: 1fr; }
}
@media (min-width: 768px) and (max-width: 991px) {
  .related-grid { grid-template-columns: repeat(2, 1fr); }
  .related-grid .related-card:last-child { grid-column: span 2; }
}

/* roulang page: category1 */
:root {
      --primary: #1565D8;
      --primary-dark: #0E4FB0;
      --primary-soft: #E8F0FE;
      --accent: #FF6B2C;
      --accent-dark: #E0540F;
      --dark: #0B1E33;
      --bg: #F5F7FA;
      --card: #FFFFFF;
      --text: #11243A;
      --text-secondary: #5B6C7F;
      --border: #DFE6EE;
      --radius-card: 16px;
      --radius-btn: 48px;
      --radius-badge: 6px;
      --radius-form: 10px;
      --shadow-sm: 0 2px 12px rgba(11, 30, 51, 0.06);
      --shadow-lg: 0 8px 32px rgba(11, 30, 51, 0.12);
      --font-sans: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: var(--font-sans);
      background: var(--bg);
      color: var(--text);
      line-height: 1.7;
      margin: 0;
      -webkit-font-smoothing: antialiased;
    }

    a {
      color: var(--primary);
      text-decoration: none;
      transition: color 0.2s ease;
    }

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

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

    .container {
      max-width: 1240px;
      padding-left: 20px;
      padding-right: 20px;
    }

    @media (max-width: 576px) {
      .container {
        padding-left: 16px;
        padding-right: 16px;
      }
    }

    .btn {
      border-radius: var(--radius-btn);
      font-weight: 600;
      padding: 12px 28px;
      transition: all 0.25s ease;
    }

    .btn:focus,
    .btn:focus-visible {
      outline: none;
      box-shadow: 0 0 0 3px rgba(21, 101, 216, 0.3);
    }

    .btn-primary-custom {
      background: var(--primary);
      border: 1px solid var(--primary);
      color: #fff;
      border-radius: var(--radius-btn);
    }

    .btn-primary-custom:hover,
    .btn-primary-custom:focus {
      background: var(--primary-dark);
      border-color: var(--primary-dark);
      color: #fff;
      box-shadow: 0 4px 16px rgba(21, 101, 216, 0.35);
    }

    .btn-outline-custom {
      background: #fff;
      border: 1px solid var(--primary);
      color: var(--primary);
      border-radius: var(--radius-btn);
    }

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

    .btn-accent-custom {
      background: var(--accent);
      border: 1px solid var(--accent);
      color: #fff;
      border-radius: var(--radius-btn);
    }

    .btn-accent-custom:hover,
    .btn-accent-custom:focus {
      background: var(--accent-dark);
      border-color: var(--accent-dark);
      color: #fff;
      box-shadow: 0 4px 16px rgba(255, 107, 44, 0.35);
    }

    /* ===== Topbar ===== */
    .topbar {
      background: var(--dark);
      color: #fff;
      font-size: 13px;
      height: 36px;
      display: flex;
      align-items: center;
    }

    .topbar .container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
    }

    .topbar-domain {
      font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
      font-weight: 600;
      letter-spacing: 0.02em;
    }

    .topbar-tip {
      opacity: 0.8;
      text-align: center;
    }

    .topbar-action {
      color: #fff;
      text-decoration: none;
      border-bottom: 1px solid transparent;
      transition: border-color 0.2s ease;
      white-space: nowrap;
    }

    .topbar-action:hover {
      color: #fff;
      border-bottom-color: rgba(255, 255, 255, 0.7);
    }

    @media (max-width: 576px) {
      .topbar-tip {
        display: none;
      }
    }

    /* ===== Navigation ===== */
    .navbar-main {
      background: var(--card);
      position: sticky;
      top: 0;
      z-index: 1000;
      box-shadow: 0 1px 0 var(--border);
      min-height: 72px;
    }

    .nav-inner {
      display: flex;
      align-items: center;
      min-height: 72px;
      gap: 20px;
    }

    .brand {
      display: inline-flex;
      align-items: center;
      gap: 10px;
    }

    .brand-icon {
      width: 32px;
      height: 32px;
      border-radius: 8px;
      background: var(--primary-soft);
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 18px;
      flex-shrink: 0;
    }

    .brand-text {
      font-size: 20px;
      font-weight: 700;
      color: var(--text);
      letter-spacing: 0.01em;
      transition: color 0.2s ease;
    }

    .brand:hover .brand-text {
      color: var(--primary);
    }

    .nav-menu {
      display: flex;
      align-items: center;
      gap: 28px;
      margin-left: auto;
    }

    .nav-links {
      list-style: none;
      display: flex;
      align-items: center;
      gap: 28px;
      margin: 0;
      padding: 0;
    }

    .nav-link {
      font-size: 16px;
      color: var(--text-secondary);
      font-weight: 500;
      text-decoration: none;
      padding: 8px 2px;
      border-bottom: 2px solid transparent;
      transition: color 0.2s ease, border-color 0.2s ease;
    }

    .nav-link:hover,
    .nav-link.active {
      color: var(--primary);
      border-bottom-color: var(--primary);
    }

    .nav-link.active {
      font-weight: 600;
    }

    .nav-cta {
      margin-left: 8px;
      padding: 10px 24px;
    }

    .nav-toggle {
      display: none;
      background: transparent;
      border: 0;
      cursor: pointer;
      flex-direction: column;
      gap: 5px;
      padding: 6px;
      border-radius: 6px;
    }

    .nav-toggle span {
      display: block;
      width: 22px;
      height: 2px;
      background: var(--dark);
      border-radius: 2px;
      transition: transform 0.25s ease, opacity 0.25s ease;
    }

    .nav-toggle.active span:nth-child(1) {
      transform: translateY(7px) rotate(45deg);
    }

    .nav-toggle.active span:nth-child(2) {
      opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
      transform: translateY(-7px) rotate(-45deg);
    }

    @media (max-width: 991.98px) {
      .nav-toggle {
        display: inline-flex;
        margin-left: auto;
      }

      .nav-menu {
        position: fixed;
        top: 108px;
        left: 0;
        right: 0;
        background: #fff;
        padding: 32px 20px;
        flex-direction: column;
        align-items: stretch;
        gap: 20px;
        box-shadow: 0 8px 32px rgba(11, 30, 51, 0.12);
        display: none;
        z-index: 999;
        border-top: 1px solid var(--border);
      }

      .nav-menu.open {
        display: flex;
      }

      .nav-links {
        flex-direction: column;
        align-items: stretch;
        gap: 0;
      }

      .nav-link {
        font-size: 20px;
        padding: 16px 0;
        border-bottom: 1px solid var(--border);
        display: block;
      }

      .nav-cta {
        margin-left: 0;
        text-align: center;
        width: 100%;
      }
    }

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

    .breadcrumb {
      margin-bottom: 0;
      background: transparent;
    }

    .breadcrumb-item {
      font-size: 14px;
      color: var(--text-secondary);
    }

    .breadcrumb-item a {
      color: var(--text-secondary);
      text-decoration: none;
    }

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

    .breadcrumb-item.active {
      color: var(--primary);
      font-weight: 500;
    }

    .breadcrumb-item + .breadcrumb-item::before {
      content: "·";
      color: #B8C4D0;
    }

    /* ===== Section common ===== */
    .section-head {
      text-align: center;
      margin-bottom: 40px;
    }

    .section-label {
      display: inline-block;
      background: var(--primary-soft);
      color: var(--primary);
      font-size: 13px;
      font-weight: 600;
      padding: 4px 14px;
      border-radius: var(--radius-badge);
      letter-spacing: 0.04em;
      margin-bottom: 12px;
    }

    .section-head h2 {
      font-size: 30px;
      font-weight: 700;
      color: var(--text);
      line-height: 1.4;
      margin-bottom: 0;
    }

    @media (max-width: 576px) {
      .section-head h2 {
        font-size: 22px;
      }
    }

    /* ===== Intro section ===== */
    .intro-section {
      padding: 72px 0 80px;
      background: linear-gradient(180deg, #E8F0FE 0%, #F5F7FA 100%);
    }

    .intro-kicker {
      display: inline-block;
      font-size: 13px;
      font-weight: 600;
      letter-spacing: 0.08em;
      color: var(--primary);
      background: #fff;
      border: 1px solid var(--border);
      padding: 5px 14px;
      border-radius: var(--radius-badge);
      margin-bottom: 18px;
    }

    .intro-section h1 {
      font-size: 42px;
      font-weight: 700;
      line-height: 1.3;
      letter-spacing: 0.01em;
      color: var(--text);
      margin-bottom: 18px;
    }

    .intro-desc {
      font-size: 16px;
      color: var(--text-secondary);
      line-height: 1.8;
      max-width: 520px;
      margin-bottom: 32px;
    }

    .intro-stats {
      display: flex;
      flex-wrap: wrap;
      gap: 32px;
      margin-bottom: 32px;
    }

    .intro-stats div {
      display: flex;
      flex-direction: column;
    }

    .intro-stats strong {
      font-size: 30px;
      font-weight: 800;
      color: var(--text);
      line-height: 1.2;
    }

    .intro-stats strong::after {
      content: "+";
      color: var(--accent);
    }

    .intro-stats strong:last-child::after {
      content: "";
    }

    .intro-stats span {
      font-size: 13px;
      color: var(--text-secondary);
      margin-top: 4px;
    }

    .intro-actions {
      display: flex;
      flex-wrap: wrap;
      gap: 14px;
    }

    .intro-media {
      aspect-ratio: 4 / 3;
      border-radius: var(--radius-card);
      overflow: hidden;
      box-shadow: var(--shadow-lg);
      background: #E2EAF3;
      position: relative;
    }

    .intro-media img {
      width: 100%;
      height: 100%;
      object-fit: cover;
    }

    @media (max-width: 991.98px) {
      .intro-section {
        padding: 48px 0 56px;
      }

      .intro-section h1 {
        font-size: 32px;
      }

      .intro-media {
        margin-top: 16px;
      }
    }

    @media (max-width: 576px) {
      .intro-stats {
        gap: 20px;
      }

      .intro-stats strong {
        font-size: 24px;
      }
    }

    /* ===== Feature section ===== */
    .feature-section {
      padding: 88px 0;
    }

    .feature-card {
      background: var(--card);
      border: 1px solid var(--border);
      border-radius: var(--radius-card);
      padding: 32px 28px;
      height: 100%;
      box-shadow: var(--shadow-sm);
      transition: transform 0.25s ease, box-shadow 0.25s ease;
    }

    .feature-card:hover {
      transform: translateY(-2px);
      box-shadow: var(--shadow-lg);
    }

    .feature-icon {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: var(--primary-soft);
      color: var(--primary);
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 22px;
      margin-bottom: 20px;
    }

    .feature-card h3 {
      font-size: 18px;
      font-weight: 600;
      margin-bottom: 10px;
      color: var(--text);
    }

    .feature-card p {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.6;
      margin-bottom: 0;
    }

    @media (max-width: 767.98px) {
      .feature-section {
        padding: 56px 0;
      }
    }

    /* ===== News section (vertical cards) ===== */
    .news-section {
      padding: 88px 0;
      background: var(--bg);
    }

    .news-card {
      background: var(--card);
      border: 1px solid var(--border);
      border-radius: var(--radius-card);
      overflow: hidden;
      height: 100%;
      display: flex;
      flex-direction: column;
      box-shadow: var(--shadow-sm);
      transition: transform 0.25s ease, box-shadow 0.25s ease;
    }

    .news-card:hover {
      transform: translateY(-2px);
      box-shadow: var(--shadow-lg);
    }

    .news-card-img {
      position: relative;
      aspect-ratio: 3 / 2;
      overflow: hidden;
      background: #E2EAF3;
    }

    .news-card-img img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.4s ease;
    }

    .news-card:hover .news-card-img img {
      transform: scale(1.04);
    }

    .news-tag {
      position: absolute;
      top: 14px;
      left: 14px;
      background: var(--primary);
      color: #fff;
      font-size: 12px;
      font-weight: 600;
      padding: 4px 12px;
      border-radius: var(--radius-badge);
      letter-spacing: 0.02em;
    }

    .news-card-body {
      padding: 24px 22px 26px;
      display: flex;
      flex-direction: column;
      flex: 1;
    }

    .news-card-body h3 {
      font-size: 17px;
      font-weight: 600;
      color: var(--text);
      margin-bottom: 10px;
      line-height: 1.45;
    }

    .news-card-body p {
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.65;
      margin-bottom: 16px;
      flex: 1;
    }

    .news-card-link {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 14px;
      font-weight: 600;
      color: var(--primary);
      text-decoration: none;
    }

    .news-card-link i {
      transition: transform 0.2s ease;
      font-size: 14px;
    }

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

    .news-card-link:hover i {
      transform: translateX(3px);
    }

    @media (max-width: 767.98px) {
      .news-section {
        padding: 56px 0;
      }
    }

    /* ===== Coverage section ===== */
    .coverage-section {
      padding: 72px 0;
      background: var(--dark);
    }

    .coverage-section .section-head .section-label {
      background: rgba(255, 255, 255, 0.1);
      color: #E8F0FE;
    }

    .coverage-section .section-head h2 {
      color: #fff;
    }

    .coverage-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }

    .coverage-item {
      background: rgba(255, 255, 255, 0.06);
      border: 1px solid rgba(255, 255, 255, 0.1);
      border-radius: var(--radius-card);
      padding: 28px 24px;
      transition: background 0.25s ease, border-color 0.25s ease;
    }

    .coverage-item:hover {
      background: rgba(255, 255, 255, 0.1);
      border-color: rgba(255, 255, 255, 0.2);
    }

    .coverage-icon {
      width: 44px;
      height: 44px;
      border-radius: 10px;
      background: rgba(255, 255, 255, 0.1);
      color: #fff;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      margin-bottom: 16px;
    }

    .coverage-item h3 {
      font-size: 17px;
      font-weight: 600;
      color: #fff;
      margin-bottom: 8px;
    }

    .coverage-item p {
      font-size: 14px;
      color: rgba(255, 255, 255, 0.72);
      line-height: 1.6;
      margin-bottom: 0;
    }

    @media (max-width: 991.98px) {
      .coverage-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
      }
    }

    @media (max-width: 576px) {
      .coverage-section {
        padding: 56px 0;
      }

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

    /* ===== FAQ Section ===== */
    .faq-section {
      padding: 88px 0;
      background: var(--bg);
    }

    .faq-list {
      max-width: 780px;
      margin: 0 auto;
    }

    .faq-item {
      background: var(--card);
      border: 1px solid var(--border);
      border-radius: var(--radius-card);
      margin-bottom: 14px;
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: box-shadow 0.25s ease;
    }

    .faq-item.active {
      box-shadow: var(--shadow-lg);
    }

    .faq-question {
      width: 100%;
      background: transparent;
      border: 0;
      text-align: left;
      font-size: 16px;
      font-weight: 600;
      color: var(--text);
      padding: 20px 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 14px;
      cursor: pointer;
      transition: color 0.2s ease;
    }

    .faq-question::after {
      content: "\F282";
      font-family: "bootstrap-icons";
      font-size: 14px;
      color: var(--text-secondary);
      transition: transform 0.25s ease;
      flex-shrink: 0;
    }

    .faq-item.active .faq-question::after {
      transform: rotate(180deg);
    }

    .faq-item.active .faq-question {
      color: var(--primary);
    }

    .faq-answer {
      display: none;
      padding: 0 24px 20px;
      font-size: 14px;
      color: var(--text-secondary);
      line-height: 1.7;
      border-left: 3px solid var(--primary);
      margin: 0 24px 18px;
      padding-left: 16px;
    }

    .faq-answer p {
      margin-bottom: 0;
    }

    .faq-item.active .faq-answer {
      display: block;
    }

    @media (max-width: 767.98px) {
      .faq-section {
        padding: 56px 0;
      }
    }

    /* ===== CTA Section ===== */
    .cta-section {
      padding: 88px 0;
    }

    .cta-inner {
      background: linear-gradient(135deg, #E8F0FE 0%, #F5F7FA 100%);
      border: 1px solid var(--border);
      border-radius: var(--radius-card);
      padding: 56px 40px;
      text-align: center;
    }

    .cta-inner h2 {
      font-size: 28px;
      font-weight: 700;
      color: var(--text);
      margin-bottom: 14px;
    }

    .cta-inner p {
      font-size: 15px;
      color: var(--text-secondary);
      max-width: 480px;
      margin: 0 auto 28px;
      line-height: 1.7;
    }

    @media (max-width: 576px) {
      .cta-section {
        padding: 56px 0;
      }

      .cta-inner {
        padding: 40px 20px;
      }

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

    /* ===== Footer ===== */
    .footer {
      background: var(--dark);
      color: #fff;
      padding: 56px 0 24px;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.4fr;
      gap: 40px;
      padding-bottom: 40px;
      border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

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

    .footer-desc {
      font-size: 14px;
      color: rgba(255, 255, 255, 0.7);
      line-height: 1.7;
      margin: 16px 0 20px;
      max-width: 260px;
    }

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

    .footer-social a {
      width: 36px;
      height: 36px;
      border-radius: 50%;
      background: rgba(255, 255, 255, 0.1);
      color: #fff;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      font-size: 14px;
      transition: background 0.2s ease;
    }

    .footer-social a:hover {
      background: var(--primary);
      color: #fff;
    }

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

    .footer-links {
      list-style: none;
      padding: 0;
      margin: 0;
    }

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

    .footer-links a,
    .footer-contact a {
      color: rgba(255, 255, 255, 0.7);
      font-size: 14px;
      text-decoration: none;
      transition: color 0.2s ease;
    }

    .footer-links a:hover,
    .footer-contact a:hover {
      color: #fff;
    }

    .footer-contact {
      list-style: none;
      padding: 0;
      margin: 0;
    }

    .footer-contact li {
      display: flex;
      align-items: flex-start;
      gap: 10px;
      font-size: 14px;
      color: rgba(255, 255, 255, 0.7);
      margin-bottom: 12px;
      line-height: 1.5;
    }

    .footer-contact i {
      color: var(--accent);
      margin-top: 2px;
    }

    .footer-bottom {
      text-align: center;
      padding-top: 24px;
      font-size: 13px;
      color: rgba(255, 255, 255, 0.5);
    }

    .footer-bottom a {
      color: rgba(255, 255, 255, 0.5);
      text-decoration: none;
    }

    .footer-bottom a:hover {
      color: #fff;
    }

    @media (max-width: 991.98px) {
      .footer-grid {
        grid-template-columns: 1fr 1fr;
        gap: 32px;
      }
    }

    @media (max-width: 576px) {
      .footer-grid {
        grid-template-columns: 1fr;
        gap: 28px;
      }
    }

    /* ===== Modal custom ===== */
    .modal-content {
      border-radius: 20px;
      border: 0;
      box-shadow: 0 16px 48px rgba(11, 30, 51, 0.16);
      padding: 8px;
    }

    .modal-header {
      border-bottom: 1px solid var(--border);
      padding: 20px 24px 16px;
    }

    .modal-title {
      font-size: 18px;
      font-weight: 600;
      color: var(--text);
    }

    .btn-close {
      border-radius: 50%;
      opacity: 0.6;
      transition: opacity 0.2s ease, background 0.2s ease;
    }

    .btn-close:hover {
      opacity: 1;
      background: var(--primary-soft);
    }

    .modal-body {
      padding: 20px 24px 24px;
    }

    .form-label {
      font-size: 14px;
      font-weight: 500;
      color: var(--text);
    }

    .form-control,
    .form-select {
      height: 44px;
      border-radius: var(--radius-form);
      border: 1px solid #D5DEE8;
      font-size: 14px;
      padding-left: 14px;
      padding-right: 14px;
      transition: border-color 0.2s ease, box-shadow 0.2s ease;
    }

    textarea.form-control {
      height: auto;
      padding-top: 10px;
      resize: vertical;
    }

    .form-control:focus,
    .form-select:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 2px var(--primary-soft);
      outline: none;
    }

    .privacy-note {
      font-size: 12px;
      color: #6B7A8C;
      text-align: center;
      margin-top: 12px;
      margin-bottom: 0;
    }

    .modal .btn-primary-custom {
      width: 100%;
      padding: 12px 20px;
    }

    @media (max-width: 576px) {
      .modal-dialog {
        margin: 12px;
      }
    }

/* roulang page: category2 */
:root {
  --primary: #1565D8;
  --primary-dark: #0E4FB0;
  --primary-soft: #E8F0FE;
  --accent: #FF6B2C;
  --accent-dark: #E0540F;
  --dark: #0B1E33;
  --bg: #F5F7FA;
  --card: #FFFFFF;
  --text: #11243A;
  --text-secondary: #5B6C7F;
  --border: #DFE6EE;
  --radius-card: 16px;
  --radius-btn: 48px;
  --radius-badge: 6px;
  --radius-input: 10px;
  --shadow-sm: 0 2px 12px rgba(11, 30, 51, 0.06);
  --shadow-hover: 0 8px 32px rgba(11, 30, 51, 0.12);
  --gutter: 24px;
  --section-space: 88px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color .2s ease;
}

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

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

ul,
ol {
  padding: 0;
  margin: 0;
  list-style: none;
}

.container {
  max-width: 1240px;
  padding-left: 20px;
  padding-right: 20px;
  margin-left: auto;
  margin-right: auto;
}

/* ===== 顶部信息条 ===== */
.topbar {
  background: var(--dark);
  color: #fff;
  font-size: 13px;
  height: 36px;
  display: flex;
  align-items: center;
}

.topbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.topbar-domain {
  font-family: 'SF Mono', 'Consolas', monospace;
  font-weight: 600;
  letter-spacing: .3px;
  color: rgba(255, 255, 255, .9);
  white-space: nowrap;
}

.topbar-tip {
  color: rgba(255, 255, 255, .75);
  font-size: 13px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.topbar-action a {
  color: #fff;
  font-weight: 500;
  border-bottom: 1px solid rgba(255, 255, 255, .4);
  padding-bottom: 2px;
  transition: border-color .2s;
  white-space: nowrap;
}

.topbar-action a:hover {
  color: #fff;
  border-color: #fff;
}

@media (max-width: 575.98px) {
  .topbar-tip {
    display: none;
  }
}

/* ===== 导航 ===== */
.navbar-main {
  background: #fff;
  position: sticky;
  top: 0;
  z-index: 1000;
  height: 72px;
  border-bottom: 1px solid var(--border);
  box-shadow: 0 1px 4px rgba(11, 30, 51, .03);
}

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

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

.brand-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), #3D8BFF);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 18px;
  box-shadow: 0 4px 12px rgba(21, 101, 216, .25);
}

.brand-text {
  font-size: 20px;
  font-weight: 800;
  color: var(--text);
  letter-spacing: .5px;
  transition: color .2s;
}

.brand:hover .brand-text {
  color: var(--primary);
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-link {
  display: inline-block;
  padding: 8px 14px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: 8px;
  position: relative;
  transition: color .2s, background .2s;
}

.nav-link::after {
  content: '';
  display: block;
  height: 2px;
  width: 0;
  background: var(--primary);
  position: absolute;
  bottom: 2px;
  left: 14px;
  right: 14px;
  border-radius: 2px;
  transition: width .25s ease;
}

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

.nav-link:hover::after {
  width: calc(100% - 28px);
}

.nav-link.active {
  color: var(--primary);
  font-weight: 600;
  background: var(--primary-soft);
}

.nav-link.active::after {
  width: calc(100% - 28px);
}

.nav-cta {
  margin-left: 8px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  border-radius: var(--radius-btn);
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: all .25s ease;
  cursor: pointer;
  line-height: 1.4;
  text-align: center;
}

.btn:focus-visible {
  outline: 3px solid rgba(21, 101, 216, .3);
  outline-offset: 2px;
}

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

.btn-primary-custom:hover {
  background: var(--primary-dark);
  border-color: var(--primary-dark);
  color: #fff;
  box-shadow: 0 4px 16px rgba(21, 101, 216, .35);
  transform: translateY(-1px);
}

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

.btn-accent-custom:hover {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
  color: #fff;
  box-shadow: 0 4px 16px rgba(224, 84, 15, .3);
  transform: translateY(-1px);
}

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

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

.btn-lg-custom {
  padding: 14px 36px;
  font-size: 16px;
}

.btn-sm-custom {
  padding: 8px 18px;
  font-size: 14px;
}

.nav-toggle {
  display: none;
  background: transparent;
  border: none;
  width: 42px;
  height: 42px;
  border-radius: 8px;
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  padding: 0;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: all .3s ease;
}

.nav-toggle.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.open span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

@media (max-width: 991.98px) {
  .nav-toggle {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: 108px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 24px 20px 32px;
    box-shadow: 0 12px 32px rgba(11, 30, 51, .12);
    border-bottom: 1px solid var(--border);
    transform: translateY(-12px);
    opacity: 0;
    visibility: hidden;
    transition: all .3s ease;
    z-index: 999;
  }

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

  .nav-links {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    margin-bottom: 16px;
  }

  .nav-link {
    display: block;
    padding: 14px 16px;
    font-size: 17px;
    border-radius: 10px;
  }

  .nav-link::after {
    display: none;
  }

  .nav-cta {
    width: 100%;
    margin-left: 0;
  }
}

/* ===== 面包屑 ===== */
.breadcrumb-bar {
  background: var(--bg);
  border-bottom: 1px solid var(--border);
  padding: 16px 0;
}

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

.breadcrumb-list a {
  color: var(--text-secondary);
  transition: color .2s;
}

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

.breadcrumb-sep {
  color: #B0BED0;
  font-size: 12px;
}

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

/* ===== Hero ===== */
.page-hero {
  background: linear-gradient(180deg, #E8F0FE 0%, #F5F7FA 100%);
  padding: 72px 0 64px;
  position: relative;
  overflow: hidden;
}

.hero-inner {
  display: flex;
  align-items: center;
  gap: 56px;
}

.hero-content {
  flex: 0 0 50%;
  max-width: 50%;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  background: rgba(21, 101, 216, .1);
  padding: 6px 14px;
  border-radius: var(--radius-badge);
  margin-bottom: 20px;
}

.hero-badge i {
  font-size: 14px;
}

.hero-title {
  font-size: 40px;
  font-weight: 800;
  line-height: 1.3;
  margin: 0 0 18px;
  color: var(--text);
  letter-spacing: 1px;
}

.hero-title span {
  color: var(--primary);
}

.hero-sub {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 32px;
  max-width: 460px;
}

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

.hero-media {
  flex: 1;
  max-width: 50%;
}

.hero-media img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  border-radius: var(--radius-card);
  box-shadow: 0 12px 40px rgba(11, 30, 51, .12);
}

@media (max-width: 991.98px) {
  .page-hero {
    padding: 56px 0 48px;
  }

  .hero-inner {
    flex-direction: column;
    gap: 32px;
  }

  .hero-content,
  .hero-media {
    flex: none;
    max-width: 100%;
    width: 100%;
  }

  .hero-title {
    font-size: 32px;
  }
}

@media (max-width: 575.98px) {
  .page-hero {
    padding: 40px 0 40px;
  }

  .hero-title {
    font-size: 28px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
  }

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

/* ===== 区块公共 ===== */
.section-block {
  padding: var(--section-space) 0;
}

.section-alt {
  background: #fff;
}

.section-head {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 48px;
}

.section-tag {
  display: inline-block;
  font-size: 13px;
  font-weight: 600;
  color: var(--primary);
  background: var(--primary-soft);
  padding: 4px 12px;
  border-radius: var(--radius-badge);
  margin-bottom: 12px;
}

.section-title {
  font-size: 32px;
  font-weight: 800;
  line-height: 1.4;
  margin: 0 0 12px;
  color: var(--text);
}

.section-sub {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.6;
}

@media (max-width: 767.98px) {
  .section-block {
    --section-space: 56px;
  }

  .section-title {
    font-size: 24px;
  }
}

/* ===== 方案卡 ===== */
.solution-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  padding: 28px 24px 32px;
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all .3s ease;
  height: 100%;
}

.solution-card::before {
  content: '';
  display: block;
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform .35s ease;
}

.solution-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
  border-color: transparent;
}

.solution-card:hover::before {
  transform: scaleX(1);
}

.solution-num {
  position: absolute;
  top: -16px;
  right: 8px;
  font-size: 88px;
  font-weight: 800;
  line-height: 1;
  color: rgba(21, 101, 216, .07);
  font-family: 'Consolas', 'SF Mono', monospace;
  pointer-events: none;
  user-select: none;
}

.solution-icon {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: var(--primary-soft);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  margin-bottom: 20px;
  transition: background .3s, color .3s;
}

.solution-card:hover .solution-icon {
  background: var(--primary);
  color: #fff;
}

.solution-title {
  font-size: 18px;
  font-weight: 700;
  margin: 0 0 10px;
  color: var(--text);
}

.solution-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
}

.solution-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap .2s, color .2s;
}

.solution-link:hover {
  gap: 8px;
  color: var(--primary-dark);
}

/* ===== 流程 ===== */
.process-step {
  position: relative;
  padding: 24px;
  background: #fff;
  border-radius: var(--radius-card);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: all .3s ease;
  height: 100%;
}

.process-step:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}

.step-num {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--primary-soft);
  color: var(--primary);
  font-weight: 700;
  font-size: 16px;
  margin-bottom: 16px;
}

.step-title {
  font-size: 17px;
  font-weight: 700;
  margin: 0 0 8px;
  color: var(--text);
}

.step-desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 0;
}

.process-arrow {
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--border);
  font-size: 20px;
}

@media (max-width: 991.98px) {
  .process-arrow {
    transform: rotate(90deg);
    padding: 4px 0;
  }
}

/* ===== 场景卡 ===== */
.scene-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: all .3s ease;
  height: 100%;
  display: flex;
  flex-direction: column;
}

.scene-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}

.scene-media {
  width: 100%;
  aspect-ratio: 16/10;
  overflow: hidden;
}

.scene-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .5s ease;
}

.scene-card:hover .scene-media img {
  transform: scale(1.04);
}

.scene-body {
  padding: 24px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.scene-body h3 {
  font-size: 18px;
  font-weight: 700;
  margin: 0 0 10px;
  color: var(--text);
}

.scene-body p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 16px;
  flex: 1;
}

.scene-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
  transition: gap .2s;
}

.scene-link:hover {
  gap: 8px;
  color: var(--primary-dark);
}

/* ===== 数据条 ===== */
.data-strip {
  background: var(--dark);
  padding: 56px 0;
  color: #fff;
}

.data-item {
  text-align: center;
  padding: 16px 24px;
  position: relative;
}

.data-item+.data-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 20%;
  bottom: 20%;
  width: 1px;
  background: rgba(255, 255, 255, .1);
}

.data-number {
  font-size: 40px;
  font-weight: 800;
  line-height: 1.2;
  color: #fff;
  margin-bottom: 6px;
}

.data-number em {
  font-style: normal;
  color: var(--accent);
}

.data-label {
  font-size: 14px;
  color: rgba(255, 255, 255, .6);
}

@media (max-width: 767.98px) {
  .data-strip {
    padding: 40px 0;
  }

  .data-number {
    font-size: 30px;
  }

  .data-item+.data-item::before {
    display: none;
  }
}

/* ===== FAQ ===== */
.faq-item {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-card);
  margin-bottom: 12px;
  padding: 0 24px;
  transition: all .3s ease;
  position: relative;
  overflow: hidden;
}

.faq-item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  width: 3px;
  background: var(--primary);
  opacity: 0;
  transition: opacity .3s;
}

.faq-item.open {
  box-shadow: var(--shadow-sm);
  border-color: rgba(21, 101, 216, .3);
}

.faq-item.open::before {
  opacity: 1;
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 0;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  user-select: none;
}

.faq-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--primary-soft);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  flex-shrink: 0;
  transition: transform .3s, background .3s, color .3s;
}

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

.faq-answer {
  display: none;
  padding-bottom: 20px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.7;
}

.faq-item.open .faq-answer {
  display: block;
  animation: fadeIn .3s ease;
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ===== CTA ===== */
.cta-block {
  background: linear-gradient(135deg, #E8F0FE 0%, #F0F5FF 60%, #FFFFFF 100%);
  border-radius: 24px;
  padding: 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(21, 101, 216, .1);
}

.cta-content h2 {
  font-size: 28px;
  font-weight: 800;
  margin: 0 0 10px;
  color: var(--text);
}

.cta-content p {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 0;
  max-width: 480px;
}

@media (max-width: 767.98px) {
  .cta-block {
    flex-direction: column;
    text-align: center;
    padding: 32px 24px;
  }

  .cta-content p {
    margin-bottom: 20px;
  }
}

/* ===== 页脚 ===== */
.footer {
  background: var(--dark);
  color: #fff;
  padding: 56px 0 24px;
  margin-top: var(--section-space);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 40px;
  margin-bottom: 40px;
}

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

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

.footer-desc {
  font-size: 14px;
  color: rgba(255, 255, 255, .6);
  line-height: 1.7;
  margin-bottom: 20px;
  max-width: 280px;
}

.footer-social {
  display: flex;
  gap: 10px;
}

.footer-social a {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: rgba(255, 255, 255, .08);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, .7);
  font-size: 16px;
  transition: all .3s ease;
}

.footer-social a:hover {
  background: var(--primary);
  color: #fff;
}

.footer h4 {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  margin: 0 0 20px;
  letter-spacing: 1px;
}

.footer-links,
.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a,
.footer-contact span {
  font-size: 14px;
  color: rgba(255, 255, 255, .55);
  transition: color .2s;
}

.footer-links a:hover {
  color: #fff;
}

.footer-contact li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-size: 14px;
  color: rgba(255, 255, 255, .55);
}

.footer-contact i {
  color: var(--accent);
  font-size: 14px;
  margin-top: 4px;
}

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, .08);
  padding-top: 24px;
  text-align: center;
}

.footer-bottom p {
  font-size: 13px;
  color: rgba(255, 255, 255, .5);
  margin-bottom: 0;
}

.footer-bottom a {
  color: rgba(255, 255, 255, .65);
  transition: color .2s;
}

.footer-bottom a:hover {
  color: #fff;
}

@media (max-width: 991.98px) {
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 575.98px) {
  .footer {
    padding: 40px 0 20px;
  }

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

/* ===== Modal ===== */
.modal-content-custom {
  border-radius: 20px;
  border: none;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(11, 30, 51, .2);
}

.modal-header {
  padding: 20px 24px 0;
  border-bottom: none;
}

.modal-title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
}

.modal-close {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: var(--bg);
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  font-size: 16px;
  transition: all .2s;
  cursor: pointer;
}

.modal-close:hover {
  background: var(--primary-soft);
  color: var(--primary);
}

.modal-body {
  padding: 20px 24px 28px;
}

.modal-body .form-label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 6px;
}

.modal-body .form-control,
.modal-body .form-select {
  height: 44px;
  border-radius: var(--radius-input);
  border: 1px solid #D5DEE8;
  font-size: 14px;
  color: var(--text);
  padding: 0 14px;
  transition: all .25s ease;
  background-color: #fff;
}

.modal-body .form-control:focus,
.modal-body .form-select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(21, 101, 216, .12);
  outline: none;
}

.modal-body textarea.form-control {
  height: auto;
  min-height: 90px;
  padding: 10px 14px;
  resize: vertical;
}

.modal-body .btn {
  width: 100%;
  margin-top: 8px;
}

.form-privacy {
  font-size: 12px;
  color: #6B7A8C;
  text-align: center;
  margin-top: 12px;
}

.modal-backdrop.show {
  background: rgba(11, 30, 51, .6);
  backdrop-filter: blur(2px);
}

/* ===== 通用工具 ===== */
.mt-32 {
  margin-top: 32px;
}

.mb-32 {
  margin-bottom: 32px;
}

.text-center {
  text-align: center;
}

/* roulang page: category3 */
/* ========== 设计变量 ========== */
:root {
  --primary: #1565D8;
  --primary-dark: #0E4FB0;
  --primary-soft: #E8F0FE;
  --accent: #FF6B2C;
  --accent-dark: #E0540F;
  --dark: #0B1E33;
  --bg: #F5F7FA;
  --card: #FFFFFF;
  --text: #11243A;
  --text-secondary: #5B6C7F;
  --border: #DFE6EE;
  --radius: 16px;
  --radius-sm: 8px;
  --radius-lg: 20px;
  --shadow: 0 2px 12px rgba(11,30,51,0.06);
  --shadow-hover: 0 8px 32px rgba(11,30,51,0.12);
  --transition: all 0.3s ease;
}

/* ========== Reset / Base ========== */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
}
body {
  font-family: 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}
a {
  color: var(--primary);
  text-decoration: none;
  transition: var(--transition);
}
a:hover {
  color: var(--primary-dark);
}
img {
  max-width: 100%;
  height: auto;
  display: block;
}
button {
  border: none;
  background: none;
  font-family: inherit;
}
input, select, textarea {
  font-family: inherit;
  font-size: 14px;
}

.container {
  max-width: 1240px;
  padding-left: 20px;
  padding-right: 20px;
}

/* ========== 顶部信息条 ========== */
.top-bar {
  height: 36px;
  background: var(--dark);
  color: rgba(255,255,255,0.85);
  font-size: 13px;
  display: flex;
  align-items: center;
}
.top-bar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.top-domain {
  font-family: 'SF Mono', 'Fira Code', monospace;
  font-weight: 600;
  letter-spacing: 0.3px;
  color: #fff;
}
.top-tip {
  color: rgba(255,255,255,0.6);
  font-size: 13px;
}
.top-cta {
  color: #fff;
  font-weight: 500;
  font-size: 13px;
  border-bottom: 1px solid transparent;
  transition: var(--transition);
}
.top-cta:hover {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* ========== 主导航 ========== */
.navbar-main {
  background: #fff;
  height: 72px;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 8px rgba(11,30,51,0.04);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.brand-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 18px;
}
.brand-text {
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.5px;
  transition: var(--transition);
}
.brand:hover .brand-text {
  color: var(--primary);
}
.nav-menu {
  display: flex;
  align-items: center;
  gap: 28px;
}
.nav-links {
  display: flex;
  list-style: none;
  gap: 4px;
  margin: 0;
  padding: 0;
}
.nav-link {
  display: inline-block;
  padding: 8px 16px;
  font-size: 16px;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: 6px;
  position: relative;
  transition: var(--transition);
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transition: width 0.3s ease;
}
.nav-link:hover,
.nav-link.active {
  color: var(--primary);
}
.nav-link:hover::after,
.nav-link.active::after {
  width: 24px;
}
.nav-cta {
  flex-shrink: 0;
}
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 6px;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  cursor: pointer;
  transition: var(--transition);
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: var(--transition);
}
.nav-toggle.active span:nth-child(1) {
  transform: translateY(8px) rotate(45deg);
}
.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}
.nav-toggle.active span:nth-child(3) {
  transform: translateY(-8px) rotate(-45deg);
}

/* ========== 按钮 ========== */
.btn-primary-custom {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  background: var(--primary);
  color: #fff;
  border-radius: 48px;
  font-size: 15px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 2px 8px rgba(21,101,216,0.25);
}
.btn-primary-custom:hover {
  background: var(--primary-dark);
  color: #fff;
  box-shadow: 0 4px 16px rgba(21,101,216,0.35);
  transform: translateY(-1px);
}
.btn-accent-custom {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  background: var(--accent);
  color: #fff;
  border-radius: 48px;
  font-size: 15px;
  font-weight: 600;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  box-shadow: 0 2px 8px rgba(255,107,44,0.25);
}
.btn-accent-custom:hover {
  background: var(--accent-dark);
  color: #fff;
  box-shadow: 0 4px 16px rgba(255,107,44,0.35);
  transform: translateY(-1px);
}
.btn-outline-custom {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 12px 28px;
  background: transparent;
  color: var(--primary);
  border: 1px solid var(--primary);
  border-radius: 48px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}
.btn-outline-custom:hover {
  background: var(--primary-soft);
  color: var(--primary-dark);
  border-color: var(--primary-dark);
}
.btn:focus-visible,
.btn-primary-custom:focus-visible,
.btn-accent-custom:focus-visible,
.btn-outline-custom:focus-visible {
  outline: 3px solid rgba(21,101,216,0.3);
  outline-offset: 2px;
}

/* ========== 面包屑 ========== */
.breadcrumb-bar {
  background: #fff;
  border-bottom: 1px solid var(--border);
  padding: 12px 0;
}
.breadcrumb-bar .breadcrumb {
  margin: 0;
  padding: 0;
}
.breadcrumb-bar .breadcrumb a {
  color: var(--text-secondary);
  font-size: 14px;
}
.breadcrumb-bar .breadcrumb a:hover {
  color: var(--primary);
}
.breadcrumb-bar .breadcrumb .active {
  color: var(--primary);
  font-weight: 500;
  font-size: 14px;
}
.breadcrumb-bar .breadcrumb-item + .breadcrumb-item::before {
  content: '/';
  color: var(--border);
}

/* ========== 分类页 Hero ========== */
.category-hero {
  background: linear-gradient(135deg, rgba(11,30,51,0.92) 0%, rgba(21,101,216,0.76) 100%), url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
  padding: 92px 0;
  color: #fff;
  position: relative;
}
.category-hero .hero-badge {
  display: inline-block;
  padding: 6px 16px;
  background: rgba(255,107,44,0.85);
  border-radius: 6px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 1px;
  margin-bottom: 20px;
  text-transform: uppercase;
}
.category-hero h1 {
  font-size: 44px;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 16px;
  color: #fff;
  max-width: 760px;
}
.category-hero .hero-subtitle {
  font-size: 17px;
  line-height: 1.7;
  color: rgba(255,255,255,0.85);
  max-width: 600px;
  margin-bottom: 32px;
}
.category-hero .hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* ========== 通用板块 ========== */
.section-padding {
  padding: 88px 0;
}
.section-head {
  margin-bottom: 40px;
  text-align: center;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}
.section-label {
  display: inline-block;
  padding: 4px 14px;
  background: var(--primary-soft);
  color: var(--primary);
  border-radius: 6px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 12px;
  letter-spacing: 0.5px;
}
.section-head h2 {
  font-size: 32px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.4;
  margin-bottom: 12px;
}
.section-head p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0;
}

/* ========== 数据摘要卡 ========== */
.summary-cards {
  background: var(--bg);
  padding: 88px 0;
}
.summary-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  display: flex;
  align-items: center;
  gap: 20px;
  transition: var(--transition);
  height: 100%;
  box-shadow: var(--shadow);
}
.summary-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
  border-color: #C8D6EA;
}
.summary-icon {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  background: var(--primary-soft);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 26px;
  flex-shrink: 0;
}
.summary-num {
  font-size: 40px;
  font-weight: 800;
  color: var(--text);
  line-height: 1.2;
}
.summary-num span {
  color: var(--accent);
  font-size: 28px;
  margin-left: 2px;
}
.summary-card p {
  font-size: 14px;
  color: var(--text-secondary);
  margin: 4px 0 0;
}

/* ========== 数据表格 ========== */
.data-table-section {
  background: #fff;
  padding: 88px 0;
}
.table-wrapper {
  background: #fff;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  overflow: hidden;
  max-width: 960px;
  margin: 0 auto;
}
.custom-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 15px;
}
.custom-table thead th {
  background: var(--primary);
  color: #fff;
  font-weight: 600;
  font-size: 14px;
  letter-spacing: 0.5px;
  padding: 16px 20px;
  text-align: center;
  white-space: nowrap;
}
.custom-table tbody td {
  padding: 16px 20px;
  text-align: center;
  border-bottom: 1px solid #EDF0F5;
  color: var(--text);
  font-weight: 500;
}
.custom-table tbody tr:nth-child(even) {
  background: #F8FAFC;
}
.custom-table tbody tr:hover {
  background: var(--primary-soft);
}
.custom-table tbody tr:last-child td {
  border-bottom: none;
}
.table-note {
  text-align: center;
  font-size: 13px;
  color: var(--text-secondary);
  margin-top: 16px;
}

/* ========== 核心能力 ========== */
.capabilities {
  background: var(--bg);
  padding: 88px 0;
}
.capability-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  height: 100%;
  transition: var(--transition);
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}
.capability-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 3px;
  background: var(--accent);
  opacity: 0;
  transition: var(--transition);
}
.capability-card:hover::before {
  opacity: 1;
}
.capability-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}
.cap-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--primary-soft);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: 20px;
}
.capability-card h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 10px;
}
.capability-card p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0;
}

/* ========== 适用场景 ========== */
.scenarios {
  background: #fff;
  padding: 88px 0;
}
.scenario-card {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  background: #fff;
  transition: var(--transition);
  height: 100%;
  box-shadow: var(--shadow);
}
.scenario-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-hover);
}
.scenario-img {
  aspect-ratio: 16/10;
  overflow: hidden;
  position: relative;
}
.scenario-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.scenario-card:hover .scenario-img img {
  transform: scale(1.04);
}
.scenario-body {
  padding: 24px;
}
.scenario-body h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}
.scenario-body p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
  margin: 0;
}

/* ========== 服务流程 ========== */
.process-section {
  background: var(--bg);
  padding: 88px 0;
}
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 40px;
}
.process-step {
  text-align: center;
  padding: 28px 20px;
  background: #fff;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: var(--transition);
  position: relative;
}
.process-step:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}
.process-num {
  font-size: 48px;
  font-weight: 800;
  color: var(--primary-soft);
  line-height: 1;
  margin-bottom: 12px;
  position: relative;
}
.process-step h3 {
  font-size: 17px;
  font-weight: 600;
  margin: 8px 0 8px;
}
.process-step p {
  font-size: 13px;
  color: var(--text-secondary);
  margin: 0;
  line-height: 1.5;
}
.process-arrow {
  position: absolute;
  right: -18px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--primary);
  font-size: 20px;
  z-index: 2;
}

/* ========== FAQ ========== */
.faq-section {
  background: #fff;
  padding: 88px 0;
}
.faq-list {
  max-width: 780px;
  margin: 0 auto;
}
.faq-item {
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
  position: relative;
}
.faq-item.active {
  border-left: 3px solid var(--primary);
  padding-left: 16px;
}
.faq-question {
  width: 100%;
  text-align: left;
  padding: 20px 0;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: var(--transition);
  background: none;
  border: none;
}
.faq-question:hover {
  color: var(--primary);
}
.faq-icon {
  font-size: 18px;
  color: var(--text-secondary);
  transition: transform 0.3s ease;
  flex-shrink: 0;
}
.faq-item.active .faq-icon {
  transform: rotate(45deg);
  color: var(--primary);
}
.faq-answer {
  padding: 0 0 20px;
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.8;
  display: none;
}
.faq-answer.show {
  display: block;
}

/* ========== CTA 区块 ========== */
.cta-section {
  background: linear-gradient(120deg, var(--primary-soft) 0%, #DCE7FA 100%);
  padding: 72px 0;
  text-align: center;
}
.cta-section h2 {
  font-size: 28px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}
.cta-section p {
  font-size: 15px;
  color: var(--text-secondary);
  margin-bottom: 28px;
}

/* ========== 页脚 ========== */
.footer {
  background: var(--dark);
  color: rgba(255,255,255,0.75);
  padding: 56px 0 24px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer .brand-text {
  color: #fff;
}
.footer .brand-icon {
  background: linear-gradient(135deg, var(--primary), var(--accent));
}
.footer-desc {
  font-size: 14px;
  color: rgba(255,255,255,0.55);
  margin: 16px 0 20px;
  line-height: 1.7;
  max-width: 320px;
}
.footer-social {
  display: flex;
  gap: 12px;
}
.footer-social a {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,0.7);
  font-size: 15px;
  transition: var(--transition);
}
.footer-social a:hover {
  background: var(--accent);
  color: #fff;
  transform: translateY(-2px);
}
.footer h4 {
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}
.footer-links {
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer-links li {
  margin-bottom: 10px;
}
.footer-links a {
  color: rgba(255,255,255,0.55);
  font-size: 14px;
  transition: var(--transition);
}
.footer-links a:hover {
  color: #fff;
  padding-left: 4px;
}
.footer-contact {
  list-style: none;
  padding: 0;
  margin: 0;
}
.footer-contact li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 12px;
  font-size: 14px;
  color: rgba(255,255,255,0.55);
}
.footer-contact li i {
  color: var(--accent);
  margin-top: 2px;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 20px;
  text-align: center;
}
.footer-bottom p {
  color: rgba(255,255,255,0.5);
  font-size: 12px;
  margin: 0;
}
.footer-bottom a {
  color: rgba(255,255,255,0.6);
}
.footer-bottom a:hover {
  color: var(--accent);
}

/* ========== Modal 定制 ========== */
.modal-content {
  border-radius: var(--radius-lg);
  border: none;
  box-shadow: 0 20px 60px rgba(11,30,51,0.2);
  padding: 10px;
}
.modal-header {
  border-bottom: 1px solid var(--border);
  padding: 16px 20px;
}
.modal-title {
  font-size: 20px;
  font-weight: 600;
  color: var(--text);
}
.modal-header .btn-close {
  background: transparent;
  font-size: 22px;
  opacity: 0.6;
  transition: var(--transition);
  border-radius: 50%;
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
  border: none;
}
.modal-header .btn-close:hover {
  opacity: 1;
  background: var(--primary-soft);
}
.modal-body {
  padding: 24px 20px 20px;
}
.modal-body .form-label {
  font-size: 13px;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 6px;
}
.modal-body .form-control,
.modal-body .form-select {
  height: 44px;
  border-radius: 10px;
  border: 1px solid #D5DEE8;
  font-size: 14px;
  color: var(--text);
  transition: var(--transition);
}
.modal-body .form-control:focus,
.modal-body .form-select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(21,101,216,0.12);
}
.modal-body textarea.form-control {
  height: auto;
  min-height: 80px;
  resize: vertical;
}
.modal-body .btn-primary-custom {
  width: 100%;
  margin-top: 4px;
}
.privacy-note {
  text-align: center;
  font-size: 12px;
  color: #6B7A8C;
  margin-top: 12px;
  margin-bottom: 0;
}

/* ========== 响应式 ========== */
@media (max-width: 991px) {
  .nav-toggle {
    display: flex;
  }
  .nav-menu {
    position: fixed;
    top: 108px;
    left: 0;
    right: 0;
    background: #fff;
    flex-direction: column;
    gap: 0;
    padding: 24px 20px 32px;
    border-bottom: 1px solid var(--border);
    box-shadow: 0 12px 32px rgba(11,30,51,0.12);
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease;
    z-index: 999;
  }
  .nav-menu.open {
    max-height: 500px;
  }
  .nav-links {
    flex-direction: column;
    width: 100%;
    gap: 4px;
  }
  .nav-link {
    display: block;
    padding: 14px 8px;
    font-size: 18px;
    font-weight: 500;
    border-bottom: 1px solid #F0F3F8;
  }
  .nav-link::after {
    display: none;
  }
  .nav-cta {
    margin-top: 20px;
    width: 100%;
  }
  .category-hero {
    padding: 72px 0;
  }
  .category-hero h1 {
    font-size: 32px;
  }
  .process-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .process-arrow {
    display: none;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 767px) {
  .section-padding,
  .summary-cards,
  .data-table-section,
  .capabilities,
  .scenarios,
  .process-section,
  .faq-section {
    padding: 56px 0;
  }
  .section-head h2 {
    font-size: 26px;
  }
  .category-hero h1 {
    font-size: 28px;
  }
  .category-hero .hero-actions {
    flex-direction: column;
    align-items: flex-start;
  }
  .category-hero .hero-actions .btn {
    width: 100%;
  }
  .summary-cards .col-md-6 {
    margin-bottom: 16px;
  }
  .summary-card {
    padding: 24px 20px;
  }
  .summary-num {
    font-size: 32px;
  }
  .process-grid {
    grid-template-columns: 1fr;
  }
  .custom-table {
    font-size: 13px;
  }
  .custom-table thead th,
  .custom-table tbody td {
    padding: 12px 10px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .top-tip {
    display: none;
  }
}

@media (max-width: 575px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }
  .category-hero {
    padding: 56px 0;
  }
  .btn-primary-custom,
  .btn-accent-custom,
  .btn-outline-custom {
    padding: 10px 22px;
    font-size: 14px;
  }
  .scenario-card {
    margin-bottom: 16px;
  }
}