/* roulang page: index */
:root {
    --primary: #3B7CA6;
    --primary-light: #EAF2F8;
    --primary-dark: #1E4A6E;
    --accent: #B8693A;
    --accent-warm: #C47A3A;
    --bg: #FAFAF7;
    --bg-blue: #F0F6FB;
    --surface: #FFFFFF;
    --text: #1F2B36;
    --text-secondary: #5C6B7A;
    --border: #E5E9EF;
    --success: #2E7D5B;
    --warning: #B8693A;
    --error: #C24C34;
    --radius-card: 12px;
    --radius-panel: 16px;
    --radius-btn: 8px;
    --shadow-card: 0 2px 8px rgba(20,45,70,0.05), 0 6px 20px rgba(20,45,70,0.06);
    --shadow-hover: 0 8px 28px rgba(20,45,70,0.10);
    --shadow-hero: 0 12px 32px rgba(30,74,110,0.15);
    --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font-sans); font-size: 16px; line-height: 1.75; color: var(--text); background: var(--bg); -webkit-font-smoothing: antialiased; }
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, select, textarea { font-family: inherit; font-size: 14px; }
ul, ol { list-style: none; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: 96px 0; }
.section-head { max-width: 680px; margin-bottom: 40px; }
.section-head h2 { font-size: 28px; font-weight: 650; line-height: 1.25; color: var(--text); }
.section-head p { margin-top: 12px; font-size: 16px; color: var(--text-secondary); }
.badge { display: inline-flex; align-items: center; padding: 4px 12px; background: var(--primary-light); color: var(--primary-dark); border-radius: 999px; font-size: 13px; font-weight: 500; }

.btn { display: inline-flex; align-items: center; justify-content: center; height: 44px; padding: 0 24px; border-radius: var(--radius-btn); font-size: 15px; font-weight: 500; transition: all .2s ease; outline: none; }
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(1px); }
.btn-primary:active { background: #173A54; }
.btn-primary:focus { box-shadow: 0 0 0 3px rgba(59,124,166,0.4); }
.btn-secondary { background: transparent; color: var(--primary-dark); border: 1px solid #B8C9D8; }
.btn-secondary:hover { border-color: var(--primary); background: var(--primary-light); }
.btn-secondary:focus { box-shadow: 0 0 0 3px rgba(59,124,166,0.2); }
.btn-lg { height: 52px; padding: 0 32px; font-size: 16px; }
.btn-sm { height: 36px; padding: 0 16px; font-size: 14px; }
.btn-block { width: 100%; }
.btn-light { background: #fff; color: var(--primary-dark); }
.btn-light:hover { background: var(--primary-light); }

.text-link { color: var(--primary); font-size: 14px; font-weight: 500; display: inline-flex; align-items: center; gap: 4px; transition: color .2s; }
.text-link:hover { color: var(--primary-dark); }
.text-link::after { content: "→"; transition: transform .2s; }
.text-link:hover::after { transform: translateX(3px); }

.site-header { background: var(--bg); padding: 20px 0 0; }
.header-inner { max-width: 1200px; margin: 0 auto; padding: 12px 24px; background: var(--surface); border-radius: var(--radius-panel); box-shadow: 0 4px 16px rgba(20,45,70,0.06); display: flex; align-items: center; justify-content: space-between; gap: 24px; position: relative; }
.site-logo { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.logo-mark { width: 40px; height: 40px; background: var(--primary); border-radius: 10px; display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.logo-mark svg { width: 22px; height: 22px; fill: #fff; }
.logo-text { font-size: 20px; font-weight: 650; color: var(--primary-dark); line-height: 1.2; }
.logo-slogan { font-size: 12px; color: var(--text-secondary); display: block; line-height: 1.4; }
.main-nav { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.nav-pill { display: inline-flex; align-items: center; height: 44px; padding: 0 16px; background: var(--primary-light); color: var(--primary-dark); border-radius: 999px; font-size: 14px; font-weight: 500; transition: all .2s; }
.nav-pill:hover { background: #DCECF7; }
.nav-pill.active { background: var(--primary); color: #fff; cursor: default; }
.nav-cta { margin-left: 8px; }
.nav-toggle { display: none; flex-direction: column; gap: 5px; width: 40px; height: 40px; justify-content: center; align-items: center; background: var(--primary-light); border-radius: 10px; flex-shrink: 0; }
.nav-toggle span { width: 18px; height: 2px; background: var(--primary-dark); border-radius: 2px; }

.hero { background: linear-gradient(135deg, var(--bg) 0%, var(--bg-blue) 100%); padding: 80px 0 64px; }
.hero-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.hero-content h1 { font-size: 36px; font-weight: 650; line-height: 1.25; color: var(--text); max-width: 560px; }
.hero-subtitle { margin-top: 20px; font-size: 18px; color: var(--text-secondary); max-width: 520px; line-height: 1.75; }
.hero-actions { margin-top: 32px; display: flex; gap: 16px; flex-wrap: wrap; }
.hero-note { margin-top: 16px; font-size: 14px; color: var(--text-secondary); }
.hero-visual { position: relative; }
.hero-visual img { width: 100%; height: 400px; object-fit: cover; border-radius: var(--radius-panel); box-shadow: var(--shadow-hero); }
.float-card { position: absolute; right: 20px; bottom: 20px; background: #fff; border-radius: var(--radius-card); padding: 16px 20px; box-shadow: var(--shadow-card); display: flex; align-items: center; gap: 12px; }
.float-num { font-size: 24px; font-weight: 700; color: var(--primary); }
.float-label { font-size: 14px; color: var(--text-secondary); }

.stats-bar { background: var(--surface); border-bottom: 1px solid var(--border); }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; padding: 32px 0; }
.stat-item { display: flex; flex-direction: column; align-items: center; text-align: center; }
.stat-num { font-size: 32px; font-weight: 700; color: var(--primary-dark); }
.stat-label { margin-top: 4px; font-size: 14px; color: var(--text-secondary); }

.feature-section { background: var(--bg); }
.feature-grid { display: grid; grid-template-columns: 1.2fr 0.8fr; gap: 24px; }
.feature-card { background: var(--surface); border-radius: var(--radius-card); overflow: hidden; box-shadow: var(--shadow-card); border: 1px solid var(--border); transition: transform .2s, box-shadow .2s; }
.feature-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-hover); }
.feature-card-lg img { width: 100%; height: 220px; object-fit: cover; }
.feature-card-tall img { width: 100%; height: 180px; object-fit: cover; }
.feature-card-body { padding: 24px; }
.feature-card-body h3 { font-size: 20px; font-weight: 650; margin: 12px 0 8px; }
.feature-card-body p { font-size: 15px; color: var(--text-secondary); margin-bottom: 16px; }
.feature-card-icon { padding: 24px; display: flex; flex-direction: column; align-items: flex-start; }
.icon-box { width: 56px; height: 56px; border-radius: 12px; background: var(--primary-light); display: flex; align-items: center; justify-content: center; margin-bottom: 16px; }
.icon-box svg { width: 24px; height: 24px; fill: var(--primary); }
.feature-card-icon h3 { font-size: 18px; font-weight: 650; margin-bottom: 8px; }
.feature-card-icon p { font-size: 15px; color: var(--text-secondary); margin-bottom: 16px; flex-grow: 1; }
.feature-banner { margin-top: 32px; background: var(--primary-light); border-radius: var(--radius-card); padding: 24px 32px; display: flex; align-items: center; justify-content: space-between; gap: 24px; flex-wrap: wrap; }
.feature-banner p { font-size: 16px; font-weight: 500; color: var(--primary-dark); }
.feature-banner .btn { flex-shrink: 0; }

.scenario-section { background: var(--surface); }
.scenario-row { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; margin-bottom: 64px; }
.scenario-row:last-child { margin-bottom: 0; }
.scenario-row-reverse .scenario-media { order: 2; }
.scenario-row-reverse .scenario-content { order: 1; }
.scenario-media img { width: 100%; height: 300px; object-fit: cover; border-radius: var(--radius-card); box-shadow: var(--shadow-card); }
.scenario-content h3 { font-size: 24px; font-weight: 650; margin: 12px 0; }
.scenario-content p { font-size: 15px; color: var(--text-secondary); margin-bottom: 20px; }
.scenario-content ul { display: flex; flex-direction: column; gap: 8px; }
.scenario-content ul li { position: relative; padding-left: 20px; font-size: 14px; color: var(--text-secondary); }
.scenario-content ul li::before { content: "✓"; position: absolute; left: 0; color: var(--success); font-weight: 700; }

.cases-section { background: var(--bg-blue); }
.cases-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.case-card { background: var(--surface); border-radius: var(--radius-card); overflow: hidden; box-shadow: var(--shadow-card); border: 1px solid var(--border); transition: transform .2s, box-shadow .2s; }
.case-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-hover); }
.case-top { position: relative; }
.case-top img { width: 100%; height: 180px; object-fit: cover; }
.case-tag { position: absolute; top: 12px; left: 12px; background: rgba(255,255,255,0.92); border-radius: 999px; padding: 4px 12px; font-size: 13px; font-weight: 500; color: var(--primary-dark); }
.case-body { padding: 24px; }
.case-body h3 { font-size: 18px; font-weight: 650; margin-bottom: 8px; }
.case-body p { font-size: 15px; color: var(--text-secondary); margin-bottom: 16px; }
.case-metric { display: flex; align-items: baseline; gap: 8px; background: var(--primary-light); border-radius: 8px; padding: 12px 16px; }
.metric-num { font-size: 22px; font-weight: 700; color: var(--accent); }
.metric-label { font-size: 13px; color: var(--text-secondary); }

.pricing-section { background: var(--bg); }
.pricing-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.pricing-card { background: var(--surface); border-radius: var(--radius-card); border: 1px solid var(--border); padding: 32px 28px; box-shadow: var(--shadow-card); position: relative; transition: transform .2s, box-shadow .2s; }
.pricing-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-hover); }
.pricing-featured { border: 2px solid var(--accent); }
.recommend-badge { position: absolute; top: -12px; left: 50%; transform: translateX(-50%); background: var(--accent); color: #fff; padding: 4px 16px; border-radius: 999px; font-size: 13px; font-weight: 500; white-space: nowrap; }
.pricing-card h3 { font-size: 20px; font-weight: 650; margin-bottom: 12px; }
.price { display: flex; align-items: baseline; gap: 4px; margin-bottom: 24px; font-size: 14px; color: var(--text-secondary); }
.price-num { font-size: 36px; font-weight: 700; color: var(--text); }
.pricing-card ul { display: flex; flex-direction: column; gap: 0; margin-bottom: 32px; }
.pricing-card ul li { font-size: 14px; color: var(--text-secondary); padding: 12px 0; border-bottom: 1px solid var(--border); }
.pricing-card ul li:last-child { border-bottom: none; }
.pricing-card .btn { margin-top: auto; }

.news-section { background: var(--surface); }
.news-list { display: flex; flex-direction: column; gap: 16px; }
.news-item { display: flex; gap: 24px; background: var(--surface); border-radius: var(--radius-card); padding: 20px; box-shadow: var(--shadow-card); border: 1px solid var(--border); transition: transform .2s, box-shadow .2s; }
.news-item:hover { transform: translateY(-2px); box-shadow: var(--shadow-hover); }
.news-thumb { flex-shrink: 0; }
.news-thumb img { width: 112px; height: 80px; object-fit: cover; border-radius: 8px; }
.news-main { display: flex; flex-direction: column; justify-content: center; min-width: 0; }
.news-meta { display: flex; align-items: center; gap: 12px; margin-bottom: 6px; }
.news-meta time { font-size: 13px; color: var(--text-secondary); }
.news-main h3 { font-size: 18px; font-weight: 650; margin-bottom: 4px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.news-main h3 a:hover { color: var(--primary); }
.news-main p { font-size: 14px; color: var(--text-secondary); overflow: hidden; text-overflow: ellipsis; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; }

.empty-state { height: 120px; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 8px; background: var(--surface); border-radius: var(--radius-card); border: 1px dashed var(--border); color: var(--text-secondary); }
.empty-icon { font-size: 28px; color: var(--primary); }

.faq-section { background: var(--bg); }
.faq-list { max-width: 820px; }
.faq-item { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-card); margin-bottom: 12px; overflow: hidden; transition: box-shadow .2s; }
.faq-item.open { box-shadow: var(--shadow-card); }
.faq-question { width: 100%; text-align: left; padding: 16px 24px; font-size: 16px; font-weight: 600; color: var(--text); display: flex; justify-content: space-between; align-items: center; gap: 16px; transition: background .2s; }
.faq-question:hover { background: var(--bg-blue); }
.faq-icon { width: 20px; height: 20px; position: relative; flex-shrink: 0; }
.faq-icon::before, .faq-icon::after { content: ""; position: absolute; background: var(--primary); border-radius: 2px; transition: transform .2s; }
.faq-icon::before { width: 16px; height: 2px; top: 9px; left: 2px; }
.faq-icon::after { width: 2px; height: 16px; top: 2px; left: 9px; }
.faq-item.open .faq-icon::after { transform: scaleY(0); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height .3s ease; }
.faq-answer-inner { padding: 0 24px 20px; font-size: 15px; color: var(--text-secondary); line-height: 1.75; }

.cta-section { background: var(--surface); }
.cta-card { background: var(--primary-dark); border-radius: var(--radius-panel); padding: 48px; display: flex; align-items: center; justify-content: space-between; gap: 48px; position: relative; overflow: hidden; }
.cta-card::before { content: ""; position: absolute; top: 0; right: 0; width: 260px; height: 260px; background: rgba(255,255,255,0.04); border-radius: 50%; transform: translate(40%, -40%); }
.cta-content { position: relative; z-index: 1; }
.cta-content h2 { font-size: 28px; font-weight: 650; color: #fff; margin-bottom: 12px; }
.cta-content p { font-size: 16px; color: #C3D7E8; margin-bottom: 24px; }
.cta-card img { width: 280px; height: 200px; object-fit: cover; border-radius: var(--radius-card); flex-shrink: 0; position: relative; z-index: 1; }

.site-footer { background: var(--primary-dark); padding: 64px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.2fr 1fr 1fr; gap: 48px; padding-bottom: 48px; }
.footer-brand .footer-logo { font-size: 22px; font-weight: 650; color: #fff; }
.footer-brand p { margin-top: 12px; font-size: 14px; color: #C3D7E8; max-width: 280px; }
.footer-nav h4, .footer-contact h4 { font-size: 16px; font-weight: 600; color: #fff; margin-bottom: 16px; }
.footer-nav ul { display: flex; flex-direction: column; gap: 8px; }
.footer-nav a { color: #C3D7E8; font-size: 14px; transition: color .2s; }
.footer-nav a:hover { color: #fff; }
.footer-contact p { font-size: 14px; color: #C3D7E8; max-width: 240px; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding: 20px 0; text-align: center; font-size: 14px; color: rgba(195,215,232,0.7); }

.mobile-sticky-cta { display: none; }

@media (max-width: 1024px) {
    .hero { padding: 60px 0 48px; }
    .hero-inner { grid-template-columns: 1fr; gap: 40px; }
    .hero-visual img { height: 300px; }
    .feature-grid { grid-template-columns: 1fr 1fr; }
    .pricing-grid { grid-template-columns: repeat(3, 1fr); gap: 16px; }
    .pricing-card { padding: 24px 20px; }
    .scenario-row { grid-template-columns: 1fr; gap: 32px; }
    .scenario-row-reverse .scenario-media { order: 0; }
    .scenario-row-reverse .scenario-content { order: 0; }
}

@media (max-width: 768px) {
    .container { padding: 0 16px; }
    .section { padding: 56px 0; }
    .section-head h2 { font-size: 24px; }
    .header-inner { padding: 12px 16px; flex-wrap: wrap; }
    .logo-text { font-size: 18px; }
    .nav-toggle { display: flex; }
    .main-nav { display: none; position: absolute; top: calc(100% + 8px); left: 16px; right: 16px; background: var(--surface); border-radius: var(--radius-panel); box-shadow: var(--shadow-hover); padding: 16px; flex-direction: column; align-items: stretch; z-index: 100; }
    .main-nav.open { display: flex; }
    .nav-pill { width: 100%; justify-content: center; }
    .nav-cta { display: none; }
    .hero { padding: 48px 0 40px; }
    .hero-content h1 { font-size: 28px; }
    .hero-subtitle { font-size: 16px; }
    .hero-visual img { height: 220px; }
    .float-card { right: 12px; bottom: 12px; padding: 12px 16px; }
    .float-num { font-size: 20px; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; padding: 24px 0; }
    .feature-grid { grid-template-columns: 1fr; }
    .feature-card-lg img, .feature-card-tall img { height: 180px; }
    .feature-banner { flex-direction: column; text-align: center; }
    .cases-grid { grid-template-columns: 1fr; }
    .pricing-grid { grid-template-columns: 1fr; }
    .pricing-featured { order: -1; }
    .news-item { flex-direction: column; }
    .news-thumb img { width: 100%; height: 120px; }
    .news-meta { flex-wrap: wrap; }
    .cta-card { flex-direction: column; padding: 32px 24px; text-align: center; }
    .cta-card img { width: 100%; height: 160px; }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .mobile-sticky-cta { display: flex; position: fixed; bottom: 0; left: 0; right: 0; background: var(--surface); padding: 12px 16px; gap: 12px; box-shadow: 0 -4px 16px rgba(20,45,70,0.08); z-index: 100; }
    .mobile-sticky-cta .btn { flex: 1; }
    body { padding-bottom: 0; }
    .footer-bottom { margin-bottom: 0; }
}

@media (max-width: 520px) {
    .logo-slogan { display: none; }
    .hero-content h1 { font-size: 26px; }
    .section-head h2 { font-size: 22px; }
    .hero-actions { flex-direction: column; }
    .hero-actions .btn { width: 100%; }
    .btn-lg { width: 100%; }
    .pricing-card { padding: 24px 20px; }
}

/* roulang page: category1 */
:root {
  --primary: #3B7CA6;
  --primary-light: #EAF2F8;
  --primary-deep: #1E4A6E;
  --primary-hover: #DCECF7;
  --accent: #B8693A;
  --accent-light: #C47A3A;
  --bg: #FAFAF7;
  --bg-blue: #F0F6FB;
  --surface: #FFFFFF;
  --text: #1F2B36;
  --text-secondary: #5C6B7A;
  --border: #E5E9EF;
  --success: #2E7D5B;
  --error: #C24C34;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 16px;
  --shadow: 0 2px 8px rgba(20,45,70,0.05), 0 6px 20px rgba(20,45,70,0.06);
  --shadow-hover: 0 8px 28px rgba(20,45,70,0.10);
  --shadow-hero: 0 12px 32px rgba(30,74,110,0.15);
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --container: 1200px;
  --spacing-section: 96px;
  --spacing-mobile: 56px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text);
  background-color: var(--bg);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

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

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

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

button {
  font-family: var(--font-sans);
  cursor: pointer;
  border: none;
}

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

/* ===== Header & Nav ===== */
.site-header {
  background: var(--bg);
  padding: 20px 0 12px;
  position: relative;
  z-index: 100;
}

.header-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: 0 4px 16px rgba(20,45,70,0.06);
  display: flex;
  align-items: center;
  gap: 24px;
  min-height: 72px;
  padding: 12px 24px;
}

.site-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.logo-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  background: var(--primary-light);
  border-radius: 10px;
}

.logo-mark svg {
  width: 22px;
  height: 22px;
  fill: var(--primary);
}

.logo-text {
  display: block;
  font-size: 18px;
  font-weight: 650;
  line-height: 1.3;
  color: var(--text);
}

.logo-slogan {
  display: block;
  font-size: 12px;
  color: var(--text-secondary);
  line-height: 1.3;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 10px;
  flex: 1;
  justify-content: center;
  flex-wrap: wrap;
}

.nav-pill {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 44px;
  padding: 0 16px;
  background: var(--primary-light);
  color: var(--primary-deep);
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
  transition: all 0.2s ease;
  white-space: nowrap;
}

.nav-pill:hover {
  background: var(--primary-hover);
  color: var(--primary-deep);
}

.nav-pill.active {
  background: var(--primary);
  color: #fff;
  cursor: default;
}

.nav-pill.active:hover {
  background: var(--primary);
  color: #fff;
}

.nav-cta {
  flex-shrink: 0;
  margin-left: auto;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  font-weight: 500;
  transition: all 0.2s ease;
  text-decoration: none;
  cursor: pointer;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  padding: 0 24px;
  height: 44px;
  font-size: 14px;
}

.btn-primary:hover {
  background: var(--primary-deep);
  color: #fff;
  transform: translateY(1px);
}

.btn-primary:active {
  background: #173A54;
}

.btn-primary:focus-visible {
  outline: 2px solid rgba(59,124,166,0.4);
  outline-offset: 2px;
}

.btn-secondary {
  background: transparent;
  color: var(--primary-deep);
  border: 1px solid #B8C9D8;
  padding: 0 24px;
  height: 44px;
  font-size: 14px;
}

.btn-secondary:hover {
  border-color: var(--primary);
  background: var(--primary-light);
  color: var(--primary-deep);
}

.btn-sm {
  height: 40px;
  padding: 0 18px;
  font-size: 14px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 40px;
  background: var(--primary-light);
  border-radius: 8px;
  padding: 0 10px;
  flex-shrink: 0;
}

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

/* ===== Hero ===== */
.category-hero {
  background: linear-gradient(135deg, var(--bg) 60%, #EDF4FA 100%);
  padding: 72px 0 56px;
  position: relative;
}

.category-hero-inner {
  display: flex;
  align-items: center;
  gap: 48px;
}

.category-hero-text {
  flex: 1;
  max-width: 580px;
}

.category-hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--primary-light);
  color: var(--primary-deep);
  font-size: 13px;
  font-weight: 500;
  padding: 4px 14px;
  border-radius: 999px;
  margin-bottom: 16px;
}

.category-hero h1 {
  font-size: 36px;
  font-weight: 650;
  line-height: 1.25;
  color: var(--text);
  margin-bottom: 16px;
}

.category-hero-sub {
  font-size: 18px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 24px;
  max-width: 480px;
}

.category-hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.category-hero-visual {
  flex: 1;
  max-width: 520px;
  position: relative;
}

.hero-image-card {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-hero);
  background: var(--surface);
  border: 1px solid var(--border);
}

.hero-image-card img {
  width: 100%;
  height: 400px;
  object-fit: cover;
  display: block;
}

.hero-float-card {
  position: absolute;
  bottom: -20px;
  right: -12px;
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow-hover);
  padding: 14px 20px;
  display: flex;
  align-items: center;
  gap: 10px;
  border: 1px solid var(--border);
}

.hero-float-card .float-num {
  font-size: 24px;
  font-weight: 700;
  color: var(--accent);
  line-height: 1.2;
}

.hero-float-card .float-label {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.3;
}

/* ===== Section general ===== */
.section {
  padding: var(--spacing-section) 0;
}

.section-alt {
  background: var(--bg-blue);
}

.section-header {
  text-align: center;
  max-width: 640px;
  margin: 0 auto 40px;
}

.section-header .section-kicker {
  font-size: 14px;
  color: var(--accent);
  font-weight: 500;
  margin-bottom: 8px;
}

.section-header h2 {
  font-size: 28px;
  font-weight: 650;
  line-height: 1.25;
  color: var(--text);
  margin-bottom: 12px;
}

.section-header p {
  font-size: 16px;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ===== Quick Links Card ===== */
.quick-links {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 28px 32px;
  margin-top: 32px;
}

.quick-links-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  margin-bottom: 16px;
}

.quick-links-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.quick-link-item {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: var(--primary-light);
  border-radius: 999px;
  font-size: 14px;
  color: var(--primary-deep);
  transition: all 0.2s ease;
}

.quick-link-item:hover {
  background: var(--primary);
  color: #fff;
  transform: translateY(-1px);
}

.quick-link-item svg {
  width: 14px;
  height: 14px;
  fill: currentColor;
}

/* ===== Service Distribution ===== */
.service-distribution {
  display: flex;
  flex-direction: column;
  gap: 48px;
}

.service-row {
  display: flex;
  align-items: center;
  gap: 40px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  padding: 32px;
  transition: box-shadow 0.3s ease;
}

.service-row:hover {
  box-shadow: var(--shadow-hover);
}

.service-row.reverse {
  flex-direction: row-reverse;
}

.service-row-media {
  flex: 1;
  max-width: 440px;
}

.service-row-media img {
  border-radius: var(--radius);
  width: 100%;
  height: 260px;
  object-fit: cover;
}

.service-row-content {
  flex: 1;
}

.service-row-content .row-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  border-radius: var(--radius);
  background: var(--primary-light);
  margin-bottom: 14px;
}

.row-icon svg {
  width: 26px;
  height: 26px;
  fill: var(--primary);
}

.service-row-content h3 {
  font-size: 20px;
  font-weight: 650;
  line-height: 1.4;
  color: var(--text);
  margin-bottom: 8px;
}

.service-row-content p {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 14px;
}

.service-row-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.tag {
  display: inline-flex;
  align-items: center;
  padding: 4px 12px;
  font-size: 13px;
  border-radius: 999px;
  background: var(--primary-light);
  color: var(--primary-deep);
  font-weight: 500;
}

.tag-accent {
  background: #F7EDE4;
  color: var(--accent);
}

/* ===== Process ===== */
.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 40px;
}

.process-step {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 20px;
  text-align: center;
  box-shadow: var(--shadow);
  transition: all 0.3s ease;
  position: relative;
}

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

.step-number {
  font-size: 32px;
  font-weight: 700;
  color: var(--primary-light);
  line-height: 1;
  margin-bottom: 12px;
  display: block;
}

.step-number span {
  color: var(--primary);
}

.process-step h4 {
  font-size: 16px;
  font-weight: 650;
  color: var(--text);
  margin-bottom: 6px;
}

.process-step p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.6;
}

/* ===== Statistics ===== */
.statistics-band {
  background: var(--primary-deep);
  border-radius: var(--radius-lg);
  padding: 40px 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-top: 40px;
  color: #fff;
}

.stat-item {
  text-align: center;
  flex: 1;
}

.stat-item .stat-num {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.2;
  color: #fff;
}

.stat-item .stat-label {
  font-size: 14px;
  color: #C3D7E8;
  margin-top: 4px;
}

/* ===== FAQ ===== */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--border);
}

.faq-item:first-child {
  border-top: 1px solid var(--border);
}

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 0;
  background: transparent;
  text-align: left;
  font-size: 16px;
  font-weight: 500;
  color: var(--text);
  transition: color 0.2s ease;
}

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

.faq-question .faq-icon {
  font-size: 20px;
  color: var(--primary);
  flex-shrink: 0;
  transition: transform 0.3s ease;
  width: 20px;
  text-align: center;
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  display: none;
  padding: 0 0 16px;
  font-size: 14px;
  line-height: 1.7;
  color: var(--text-secondary);
  max-width: 680px;
}

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

.faq-notice {
  text-align: center;
  margin-top: 32px;
  font-size: 14px;
  color: var(--text-secondary);
}

.faq-notice a {
  color: var(--primary);
  font-weight: 500;
}

/* ===== CTA ===== */
.cta-card {
  background: var(--primary-deep);
  border-radius: var(--radius-lg);
  padding: 48px 56px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  box-shadow: var(--shadow-hero);
  margin-bottom: 0;
}

.cta-card-text h2 {
  font-size: 24px;
  font-weight: 650;
  color: #fff;
  margin-bottom: 8px;
}

.cta-card-text p {
  font-size: 14px;
  color: #C3D7E8;
  line-height: 1.6;
}

.cta-card .btn-primary {
  background: #fff;
  color: var(--primary-deep);
  height: 52px;
  padding: 0 32px;
  font-size: 16px;
  font-weight: 600;
  flex-shrink: 0;
}

.cta-card .btn-primary:hover {
  background: var(--accent);
  color: #fff;
  transform: translateY(-1px);
}

/* ===== Footer ===== */
.site-footer {
  background: var(--primary-deep);
  padding: 56px 0 24px;
  margin-top: 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}

.footer-logo {
  font-size: 20px;
  font-weight: 650;
  color: #fff;
  margin-bottom: 8px;
  display: block;
}

.footer-brand p {
  font-size: 14px;
  color: #C3D7E8;
  max-width: 280px;
  line-height: 1.6;
}

.footer-nav h4,
.footer-contact h4 {
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 14px;
}

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

.footer-nav ul li {
  margin-bottom: 8px;
}

.footer-nav ul li a {
  color: #C3D7E8;
  font-size: 14px;
}

.footer-nav ul li a:hover {
  color: #fff;
}

.footer-contact p {
  font-size: 14px;
  color: #C3D7E8;
  line-height: 1.6;
}

.footer-bottom {
  padding-top: 24px;
  text-align: center;
}

.footer-bottom p {
  font-size: 14px;
  color: rgba(195,215,232,0.7);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .header-inner {
    padding: 12px 16px;
    gap: 16px;
  }
  .nav-pill {
    padding: 0 12px;
    font-size: 13px;
  }
  .category-hero-inner {
    gap: 32px;
  }
  .hero-image-card img {
    height: 320px;
  }
  .process-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .section {
    padding: var(--spacing-mobile) 0;
  }
  .header-inner {
    flex-wrap: wrap;
  }
  .main-nav {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: stretch;
    gap: 8px;
    order: 3;
    padding-top: 12px;
  }
  .main-nav.open {
    display: flex;
  }
  .nav-pill {
    width: 100%;
    justify-content: flex-start;
    height: 44px;
  }
  .nav-toggle {
    display: flex;
    margin-left: auto;
  }
  .nav-cta {
    display: none;
  }
  .category-hero {
    padding: 48px 0 40px;
  }
  .category-hero-inner {
    flex-direction: column;
    gap: 32px;
  }
  .category-hero-text {
    max-width: 100%;
  }
  .category-hero h1 {
    font-size: 28px;
  }
  .category-hero-sub {
    font-size: 16px;
  }
  .category-hero-visual {
    max-width: 100%;
  }
  .hero-image-card img {
    height: 240px;
  }
  .hero-float-card {
    bottom: -14px;
    right: 8px;
  }
  .service-row,
  .service-row.reverse {
    flex-direction: column;
    padding: 24px;
    gap: 20px;
  }
  .service-row-media,
  .service-row-content {
    max-width: 100%;
    width: 100%;
  }
  .service-row-media img {
    height: 200px;
  }
  .process-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .statistics-band {
    flex-direction: column;
    padding: 32px 24px;
    gap: 24px;
  }
  .cta-card {
    flex-direction: column;
    padding: 32px 24px;
    text-align: center;
  }
  .cta-card-text h2 {
    font-size: 22px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }
}

@media (max-width: 520px) {
  .container {
    padding: 0 16px;
  }
  .header-inner {
    padding: 10px 8px;
  }
  .site-logo {
    gap: 8px;
  }
  .logo-text {
    font-size: 15px;
  }
  .category-hero {
    padding: 40px 0 32px;
  }
  .category-hero h1 {
    font-size: 26px;
  }
  .quick-links {
    padding: 20px;
  }
  .section-header h2 {
    font-size: 22px;
  }
  .section-header p {
    font-size: 15px;
  }
  .footer-bottom p {
    font-size: 13px;
  }
}

/* roulang page: article */
:root{
  --primary:#3B7CA6;
  --primary-light:#EAF2F8;
  --primary-dark:#1E4A6E;
  --accent:#B8693A;
  --accent-light:#C47A3A;
  --bg:#FAFAF7;
  --surface:#FFFFFF;
  --text:#1F2B36;
  --text-muted:#5C6B7A;
  --border:#E5E9EF;
  --success:#2E7D5B;
  --warning:#B8693A;
  --error:#C24C34;
  --radius-sm:8px;
  --radius-md:12px;
  --radius-lg:16px;
  --shadow-sm:0 2px 8px rgba(20,45,70,0.05),0 6px 20px rgba(20,45,70,0.06);
  --shadow-hover:0 8px 28px rgba(20,45,70,0.10);
  --font-sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Noto Sans SC",sans-serif;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--font-sans);
  font-size:16px;
  line-height:1.6;
  color:var(--text);
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
}
img{max-width:100%;display:block}
a{color:var(--primary);text-decoration:none}
a:hover{color:var(--primary-dark)}
ul,ol{list-style-position:inside}
button{font-family:inherit}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.site-main{min-height:60vh}

/* 按钮 */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  height:44px;
  padding:0 24px;
  border-radius:var(--radius-sm);
  font-size:15px;
  font-weight:600;
  border:1px solid transparent;
  cursor:pointer;
  text-decoration:none;
  transition:all .2s ease;
  white-space:nowrap;
}
.btn-primary{
  background:var(--primary);
  color:#fff;
}
.btn-primary:hover{
  background:var(--primary-dark);
  color:#fff;
  transform:translateY(-1px);
}
.btn-primary:active{
  background:#173A54;
  transform:translateY(0);
}
.btn-primary:focus-visible{
  outline:2px solid rgba(59,124,166,.4);
  outline-offset:2px;
}
.btn-outline{
  background:transparent;
  border-color:#B8C9D8;
  color:var(--primary-dark);
}
.btn-outline:hover{
  border-color:var(--primary);
  background:var(--primary-light);
  color:var(--primary-dark);
}
.btn-outline:focus-visible{
  outline:2px solid rgba(59,124,166,.4);
  outline-offset:2px;
}
.btn-light{
  background:#fff;
  color:var(--primary-dark);
}
.btn-light:hover{
  background:var(--primary-light);
  color:var(--primary-dark);
  transform:translateY(-1px);
}
.btn-outline-light{
  background:transparent;
  border-color:rgba(255,255,255,.5);
  color:#fff;
}
.btn-outline-light:hover{
  background:rgba(255,255,255,.12);
  border-color:rgba(255,255,255,.8);
  color:#fff;
}
.btn-sm{
  height:40px;
  padding:0 20px;
  font-size:14px;
}

/* 徽章 */
.badge{
  display:inline-flex;
  align-items:center;
  height:24px;
  padding:0 12px;
  border-radius:999px;
  font-size:13px;
  font-weight:600;
  letter-spacing:.02em;
  text-decoration:none;
}
.badge-primary{
  background:var(--primary-light);
  color:var(--primary-dark);
}
.badge-accent{
  background:#F8EEE6;
  color:var(--accent);
}

/* Header */
.site-header{
  position:sticky;
  top:0;
  z-index:100;
  background:rgba(250,250,247,.96);
  padding:16px 0;
  border-bottom:1px solid var(--border);
}
.header-inner{
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
  display:flex;
  align-items:center;
  gap:16px;
}
.site-logo{
  display:flex;
  align-items:center;
  gap:12px;
  text-decoration:none;
  flex-shrink:0;
}
.logo-mark{
  width:40px;
  height:40px;
  border-radius:10px;
  background:var(--primary);
  display:flex;
  align-items:center;
  justify-content:center;
  flex-shrink:0;
}
.logo-mark svg{
  width:22px;
  height:22px;
  fill:#fff;
}
.logo-text{
  display:block;
  font-size:18px;
  font-weight:650;
  color:var(--text);
  line-height:1.2;
}
.logo-slogan{
  display:block;
  font-size:12px;
  color:var(--text-muted);
  line-height:1.3;
  margin-top:2px;
}
.main-nav{
  display:flex;
  align-items:center;
  gap:8px;
  margin-left:16px;
  flex:1;
}
.nav-pill{
  display:inline-flex;
  align-items:center;
  height:44px;
  padding:0 16px;
  border-radius:999px;
  background:var(--primary-light);
  color:var(--primary-dark);
  font-size:14px;
  font-weight:600;
  text-decoration:none;
  transition:all .2s ease;
  white-space:nowrap;
}
.nav-pill:hover{
  background:#DCECF7;
  color:var(--primary-dark);
}
.nav-pill.active{
  background:var(--primary);
  color:#fff;
  cursor:default;
}
.nav-cta{
  margin-left:auto;
  flex-shrink:0;
}
.nav-toggle{
  display:none;
  flex-direction:column;
  gap:5px;
  width:42px;
  height:42px;
  align-items:center;
  justify-content:center;
  background:var(--primary-light);
  border-radius:10px;
  border:none;
  cursor:pointer;
  padding:0;
  transition:background .2s;
}
.nav-toggle span{
  display:block;
  width:18px;
  height:2px;
  background:var(--primary-dark);
  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);
}

/* 面包屑 */
.breadcrumb{
  padding:20px 0 0;
  font-size:14px;
  color:var(--text-muted);
}
.breadcrumb .container{
  display:flex;
  align-items:center;
  flex-wrap:wrap;
  gap:8px;
}
.breadcrumb a{
  color:var(--text-muted);
  text-decoration:none;
  transition:color .2s;
}
.breadcrumb a:hover{
  color:var(--primary);
}
.breadcrumb .sep{
  color:#C0CBD6;
}
.breadcrumb .current{
  color:var(--text);
  max-width:280px;
  overflow:hidden;
  text-overflow:ellipsis;
  white-space:nowrap;
  display:inline-block;
}

/* 文章标题区 */
.article-header{
  background:var(--primary-light);
  padding:56px 0 48px;
  margin-top:20px;
  border-radius:16px;
  position:relative;
  overflow:hidden;
}
.article-header-inner{
  max-width:760px;
  margin:0 auto;
  padding:0 24px;
}
.article-meta{
  display:flex;
  align-items:center;
  gap:16px;
  margin-bottom:20px;
  flex-wrap:wrap;
}
.article-date{
  font-size:14px;
  color:var(--text-muted);
}
.article-title{
  font-size:36px;
  font-weight:650;
  line-height:1.25;
  color:var(--text);
  margin-bottom:12px;
}
.article-desc{
  font-size:16px;
  color:var(--text-muted);
  line-height:1.7;
}

/* 正文 */
.article-content{
  padding:48px 0 16px;
}
.article-panel{
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--radius-lg);
  box-shadow:var(--shadow-sm);
  padding:48px;
  max-width:760px;
  margin:0 auto;
}
.article-body{
  font-size:16px;
  color:var(--text);
  line-height:1.75;
}
.article-body h2{
  font-size:24px;
  font-weight:650;
  color:var(--text);
  margin:32px 0 16px;
  padding-bottom:12px;
  border-bottom:1px solid var(--border);
  line-height:1.3;
}
.article-body h3{
  font-size:20px;
  font-weight:650;
  color:var(--text);
  margin:28px 0 12px;
  line-height:1.3;
}
.article-body p{
  margin-bottom:16px;
  line-height:1.75;
}
.article-body ul,.article-body ol{
  margin:16px 0 24px;
  padding-left:24px;
}
.article-body li{
  margin-bottom:8px;
  line-height:1.65;
}
.article-body blockquote{
  border-left:4px solid var(--primary);
  background:var(--primary-light);
  padding:16px 20px;
  margin:24px 0;
  border-radius:0 var(--radius-sm) var(--radius-sm) 0;
  color:var(--primary-dark);
}
.article-body blockquote p:last-child{
  margin-bottom:0;
}
.article-body img{
  max-width:100%;
  border-radius:var(--radius-md);
  margin:24px 0;
}
.article-body table{
  width:100%;
  border-collapse:collapse;
  margin:24px 0;
  font-size:14px;
}
.article-body th{
  background:var(--primary-light);
  font-weight:600;
  text-align:left;
}
.article-body th,.article-body td{
  border:1px solid var(--border);
  padding:12px 16px;
  line-height:1.5;
}
.article-body a{
  color:var(--primary);
  text-decoration:underline;
  text-underline-offset:2px;
}
.article-body a:hover{
  color:var(--primary-dark);
}
.article-body code{
  background:var(--primary-light);
  color:var(--primary-dark);
  padding:2px 6px;
  border-radius:4px;
  font-size:14px;
  font-family:ui-monospace,"SFMono-Regular","Consolas",monospace;
}
.article-body pre{
  background:var(--primary-dark);
  color:#EAF2F8;
  padding:20px;
  border-radius:12px;
  overflow-x:auto;
  margin:24px 0;
  font-size:14px;
}
.article-body pre code{
  background:transparent;
  color:inherit;
  padding:0;
}

/* 内容未找到 */
.notfound-wrap{
  padding:120px 24px;
  text-align:center;
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:16px;
  max-width:600px;
  margin:96px auto;
  box-shadow:var(--shadow-sm);
}
.notfound-text{
  font-size:24px;
  font-weight:600;
  color:var(--text);
  margin-bottom:24px;
}

/* 相关推荐 */
.related-section{
  padding:64px 0 16px;
}
.section-heading{
  text-align:center;
  margin-bottom:40px;
}
.section-heading h2{
  font-size:28px;
  font-weight:650;
  color:var(--text);
  margin-bottom:8px;
}
.section-heading p{
  font-size:14px;
  color:var(--text-muted);
}
.related-grid{
  display:grid;
  grid-template-columns:repeat(3,1fr);
  gap:24px;
}
.related-card{
  display:block;
  background:var(--surface);
  border:1px solid var(--border);
  border-radius:var(--radius-md);
  overflow:hidden;
  box-shadow:var(--shadow-sm);
  transition:all .25s ease;
  text-decoration:none;
  color:var(--text);
}
.related-card:hover{
  transform:translateY(-4px);
  box-shadow:var(--shadow-hover);
}
.related-card-img{
  height:170px;
  overflow:hidden;
  background:var(--primary-light);
}
.related-card-img img{
  width:100%;
  height:100%;
  object-fit:cover;
  transition:transform .4s ease;
}
.related-card:hover .related-card-img img{
  transform:scale(1.04);
}
.related-card-body{
  padding:20px 24px 24px;
}
.related-card-body .badge{
  margin-bottom:10px;
}
.related-card-body h3{
  font-size:18px;
  font-weight:650;
  line-height:1.3;
  margin-bottom:8px;
  color:var(--text);
  transition:color .2s;
}
.related-card-body p{
  font-size:14px;
  color:var(--text-muted);
  line-height:1.6;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
  margin-bottom:12px;
}
.card-link{
  font-size:14px;
  font-weight:600;
  color:var(--primary);
  display:inline-flex;
  align-items:center;
  gap:4px;
}
.related-card:hover .card-link{
  color:var(--primary-dark);
}

/* 返回入口 */
.article-back-links{
  display:flex;
  justify-content:center;
  gap:24px;
  margin-top:40px;
  padding-top:24px;
  border-top:1px solid var(--border);
}
.article-back-links a{
  font-size:14px;
  font-weight:600;
  color:var(--text-muted);
  text-decoration:none;
  transition:color .2s;
}
.article-back-links a:hover{
  color:var(--primary);
}

/* CTA */
.cta-section{
  padding:64px 0 96px;
}
.cta-card{
  background:var(--primary-dark);
  border-radius:20px;
  padding:56px 48px;
  text-align:center;
  color:#fff;
  box-shadow:var(--shadow-hover);
  position:relative;
  overflow:hidden;
}
.cta-card::before{
  content:"";
  position:absolute;
  top:-40px;
  right:-40px;
  width:180px;
  height:180px;
  border-radius:50%;
  background:rgba(255,255,255,.06);
}
.cta-card::after{
  content:"";
  position:absolute;
  bottom:-60px;
  left:-30px;
  width:160px;
  height:160px;
  border-radius:50%;
  background:rgba(255,255,255,.04);
}
.cta-card h2{
  font-size:28px;
  font-weight:650;
  margin-bottom:12px;
  position:relative;
  z-index:1;
}
.cta-card p{
  font-size:15px;
  color:#C3D7E8;
  margin-bottom:28px;
  position:relative;
  z-index:1;
}
.cta-actions{
  display:flex;
  justify-content:center;
  gap:16px;
  position:relative;
  z-index:1;
  flex-wrap:wrap;
}

/* Footer */
.site-footer{
  background:var(--primary-dark);
  color:#C3D7E8;
  padding:72px 0 0;
}
.site-footer .container{
  max-width:1200px;
  margin:0 auto;
  padding:0 24px;
}
.footer-grid{
  display:grid;
  grid-template-columns:2fr 1fr 1fr;
  gap:48px;
  padding-bottom:48px;
}
.footer-brand .footer-logo{
  display:inline-block;
  font-size:22px;
  font-weight:700;
  color:#fff;
  text-decoration:none;
  margin-bottom:16px;
}
.footer-brand p{
  font-size:14px;
  line-height:1.7;
  color:#9DB8CF;
  max-width:360px;
}
.footer-nav h4,.footer-contact h4{
  font-size:15px;
  font-weight:600;
  color:#fff;
  margin-bottom:16px;
}
.footer-nav ul{
  list-style:none;
  padding:0;
}
.footer-nav li{
  margin-bottom:10px;
}
.footer-nav a{
  font-size:14px;
  color:#9DB8CF;
  text-decoration:none;
  transition:color .2s;
}
.footer-nav a:hover{
  color:#fff;
}
.footer-contact p{
  font-size:14px;
  color:#9DB8CF;
  line-height:1.7;
}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);
  padding:20px 0;
  text-align:center;
}
.footer-bottom p{
  font-size:14px;
  color:rgba(195,215,232,.6);
}

/* 响应式 */
@media (max-width:1023px){
  .main-nav{
    gap:6px;
    margin-left:8px;
  }
  .nav-pill{
    padding:0 12px;
    font-size:13px;
  }
  .footer-grid{
    grid-template-columns:1fr 1fr;
    gap:40px;
  }
  .related-grid{
    grid-template-columns:repeat(2,1fr);
  }
}
@media (max-width:767px){
  .site-header{
    padding:12px 0;
  }
  .header-inner{
    flex-wrap:wrap;
    gap:10px;
    padding:0 16px;
  }
  .nav-toggle{
    display:flex;
    margin-left:auto;
  }
  .main-nav{
    display:none;
    flex-direction:column;
    width:100%;
    gap:8px;
    margin:8px 0 0;
    padding:12px;
    background:var(--surface);
    border-radius:12px;
    border:1px solid var(--border);
    box-shadow:var(--shadow-sm);
  }
  .main-nav.nav-open{
    display:flex;
  }
  .nav-pill{
    width:100%;
    justify-content:center;
    height:44px;
  }
  .nav-cta{
    display:none;
  }
  .breadcrumb{
    padding:16px 0 0;
    font-size:13px;
  }
  .breadcrumb .current{
    max-width:160px;
  }
  .article-header{
    padding:40px 0 36px;
    border-radius:12px;
    margin-top:16px;
  }
  .article-title{
    font-size:28px;
  }
  .article-panel{
    padding:24px 20px;
    border-radius:12px;
  }
  .article-content{
    padding:32px 0 8px;
  }
  .related-grid{
    grid-template-columns:1fr;
  }
  .cta-section{
    padding:48px 0 56px;
  }
  .cta-card{
    padding:40px 24px;
    border-radius:16px;
  }
  .cta-card h2{
    font-size:24px;
  }
  .footer-grid{
    grid-template-columns:1fr;
    gap:32px;
    padding-bottom:40px;
  }
  .footer-bottom p{
    font-size:13px;
  }
}
@media (max-width:520px){
  .container,.header-inner,.site-footer .container{
    padding-left:16px;
    padding-right:16px;
  }
  .article-title{
    font-size:24px;
  }
  .article-meta{
    gap:10px;
  }
  .btn{
    padding:0 18px;
    font-size:14px;
  }
  .cta-actions{
    flex-direction:column;
    align-items:center;
  }
  .cta-actions .btn{
    width:100%;
  }
}

/* roulang page: category2 */
:root {
            --primary: #3B7CA6;
            --primary-light: #EAF2F8;
            --primary-dark: #1E4A6E;
            --primary-hover: #173A54;
            --accent: #B8693A;
            --accent-light: #C47A3A;
            --bg: #FAFAF7;
            --bg-blue: #F0F6FB;
            --surface: #FFFFFF;
            --text: #1F2B36;
            --text-secondary: #5C6B7A;
            --border: #E5E9EF;
            --success: #2E7D5B;
            --warning: #B8693A;
            --error: #C24C34;
            --radius-sm: 8px;
            --radius-card: 12px;
            --radius-panel: 16px;
            --radius-badge: 999px;
            --shadow-card: 0 2px 8px rgba(20, 45, 70, 0.05), 0 6px 20px rgba(20, 45, 70, 0.06);
            --shadow-hover: 0 8px 28px rgba(20, 45, 70, 0.10);
            --shadow-image: 0 12px 32px rgba(30, 74, 110, 0.15);
            --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
            --space-section: 96px;
            --container-max: 1200px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: var(--font-sans);
            background: var(--bg);
            color: var(--text);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

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

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

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

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

        ul {
            list-style: none;
        }

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

        .site-header {
            background: var(--bg);
            padding: 20px 0 12px;
            border-bottom: 1px solid rgba(229, 233, 239, 0.6);
        }

        .header-inner {
            max-width: var(--container-max);
            margin: 0 auto;
            padding: 0 24px;
            display: flex;
            align-items: center;
            gap: 24px;
            flex-wrap: wrap;
        }

        .site-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            flex-shrink: 0;
        }

        .logo-mark {
            width: 44px;
            height: 44px;
            background: var(--primary-light);
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .logo-mark svg {
            width: 26px;
            height: 26px;
            fill: var(--primary);
        }

        .logo-text {
            font-size: 18px;
            font-weight: 650;
            color: var(--primary-dark);
            display: block;
            line-height: 1.3;
        }

        .logo-slogan {
            font-size: 12px;
            color: var(--text-secondary);
            display: block;
            line-height: 1.4;
        }

        .main-nav {
            display: flex;
            gap: 10px;
            flex: 1;
            justify-content: flex-end;
            flex-wrap: wrap;
        }

        .nav-pill {
            display: inline-flex;
            align-items: center;
            height: 44px;
            padding: 0 18px;
            background: var(--primary-light);
            color: var(--primary-dark);
            border-radius: var(--radius-badge);
            font-size: 14px;
            font-weight: 500;
            transition: background 0.2s ease, color 0.2s ease, box-shadow 0.2s ease;
            border: 1px solid transparent;
        }

        .nav-pill:hover {
            background: #DCECF7;
            color: var(--primary-dark);
            box-shadow: 0 2px 8px rgba(20, 45, 70, 0.06);
        }

        .nav-pill.active {
            background: var(--primary);
            color: #ffffff;
            cursor: default;
            box-shadow: 0 4px 12px rgba(59, 124, 166, 0.25);
        }

        .nav-pill.active:hover {
            background: var(--primary);
            color: #ffffff;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 44px;
            padding: 0 24px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 500;
            transition: all 0.2s ease;
            border: 1px solid transparent;
            text-decoration: none;
            cursor: pointer;
            white-space: nowrap;
        }

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

        .btn-primary:hover {
            background: var(--primary-dark);
            color: #ffffff;
            transform: translateY(1px);
        }

        .btn-primary:active {
            background: var(--primary-hover);
        }

        .btn-primary:focus {
            outline: none;
            box-shadow: 0 0 0 3px rgba(59, 124, 166, 0.4);
        }

        .btn-outline {
            background: transparent;
            color: var(--primary-dark);
            border-color: #B8C9D8;
        }

        .btn-outline:hover {
            border-color: var(--primary);
            color: var(--primary);
            background: rgba(59, 124, 166, 0.04);
        }

        .btn-outline:focus {
            outline: none;
            box-shadow: 0 0 0 3px rgba(59, 124, 166, 0.25);
        }

        .btn-sm {
            height: 40px;
            padding: 0 18px;
            font-size: 14px;
        }

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

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            width: 40px;
            height: 40px;
            align-items: center;
            justify-content: center;
            border-radius: var(--radius-sm);
            background: var(--primary-light);
            padding: 8px;
        }

        .nav-toggle span {
            display: block;
            width: 20px;
            height: 2px;
            background: var(--primary-dark);
            border-radius: 2px;
            transition: transform 0.3s ease, opacity 0.3s ease;
        }

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

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

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

        /* Page Hero */
        .page-hero {
            background: linear-gradient(135deg, var(--bg) 60%, var(--bg-blue) 100%);
            padding: 80px 0 64px;
            border-bottom: 1px solid var(--border);
        }

        .page-hero .container {
            position: relative;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-secondary);
            margin-bottom: 16px;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--primary);
            transition: color 0.2s;
        }

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

        .breadcrumb span {
            color: var(--text-secondary);
        }

        .page-hero h1 {
            font-size: 36px;
            font-weight: 650;
            line-height: 1.25;
            color: var(--text);
            margin-bottom: 16px;
        }

        .page-hero-abstract {
            font-size: 18px;
            color: var(--text-secondary);
            max-width: 680px;
            margin-bottom: 32px;
            line-height: 1.75;
        }

        .hero-actions {
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
            margin-bottom: 48px;
        }

        .hero-entry-card {
            background: var(--surface);
            border-radius: var(--radius-panel);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            padding: 20px 24px;
            display: flex;
            gap: 12px;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            max-width: 820px;
        }

        .entry-item {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 16px;
            border-radius: var(--radius-badge);
            background: var(--primary-light);
            color: var(--primary-dark);
            font-size: 14px;
            font-weight: 500;
            transition: background 0.2s ease, transform 0.2s ease;
            cursor: default;
        }

        .entry-item:hover {
            background: #DCECF7;
        }

        .entry-item.active {
            background: var(--primary);
            color: #fff;
        }

        .entry-item .entry-icon {
            font-size: 18px;
        }

        /* Scenario Section */
        .scenario-section {
            padding: var(--space-section) 0;
            background: var(--bg);
        }

        .section-header {
            text-align: center;
            margin-bottom: 48px;
        }

        .section-header h2 {
            font-size: 28px;
            font-weight: 650;
            line-height: 1.25;
            color: var(--text);
            margin-bottom: 12px;
        }

        .section-header p {
            color: var(--text-secondary);
            font-size: 16px;
            max-width: 600px;
            margin: 0 auto;
        }

        .scenario-card {
            display: flex;
            align-items: center;
            gap: 48px;
            margin-bottom: 56px;
            background: var(--surface);
            border-radius: var(--radius-panel);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
            padding: 32px;
            overflow: hidden;
        }

        .scenario-card:nth-child(even) {
            flex-direction: row-reverse;
        }

        .scenario-card:last-child {
            margin-bottom: 0;
        }

        .scenario-image {
            flex: 1;
            border-radius: var(--radius-card);
            overflow: hidden;
            box-shadow: var(--shadow-image);
        }

        .scenario-image img {
            width: 100%;
            height: 280px;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .scenario-card:hover .scenario-image img {
            transform: scale(1.03);
        }

        .scenario-content {
            flex: 1;
        }

        .scenario-tag {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 13px;
            font-weight: 500;
            padding: 4px 14px;
            border-radius: var(--radius-badge);
            margin-bottom: 16px;
        }

        .scenario-content h3 {
            font-size: 20px;
            font-weight: 650;
            color: var(--text);
            margin-bottom: 12px;
            line-height: 1.4;
        }

        .scenario-content p {
            color: var(--text-secondary);
            margin-bottom: 20px;
            line-height: 1.75;
        }

        .scenario-list {
            margin-bottom: 20px;
        }

        .scenario-list li {
            display: flex;
            align-items: center;
            gap: 8px;
            padding: 6px 0;
            color: var(--text);
            font-size: 15px;
        }

        .scenario-list li::before {
            content: "";
            width: 6px;
            height: 6px;
            background: var(--accent);
            border-radius: 50%;
            flex-shrink: 0;
        }

        .scenario-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: 14px;
            font-weight: 500;
            color: var(--primary);
            transition: gap 0.2s ease, color 0.2s ease;
        }

        .scenario-link:hover {
            gap: 10px;
            color: var(--primary-hover);
        }

        .scenario-link::after {
            content: "→";
            font-size: 16px;
        }

        /* Stats */
        .stats-section {
            background: var(--bg-blue);
            padding: 72px 0;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
        }

        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 32px;
        }

        .stat-item {
            text-align: center;
            padding: 24px 16px;
            background: var(--surface);
            border-radius: var(--radius-card);
            box-shadow: var(--shadow-card);
            border: 1px solid var(--border);
        }

        .stat-number {
            font-size: 36px;
            font-weight: 700;
            color: var(--accent);
            line-height: 1.2;
            margin-bottom: 8px;
        }

        .stat-label {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.5;
        }

        /* Process */
        .process-section {
            padding: var(--space-section) 0;
            background: var(--bg);
        }

        .process-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 32px;
            margin-top: 48px;
        }

        .process-step {
            background: var(--surface);
            border-radius: var(--radius-card);
            padding: 32px 24px;
            text-align: center;
            border: 1px solid var(--border);
            box-shadow: var(--shadow-card);
            position: relative;
            transition: transform 0.2s ease, box-shadow 0.2s ease;
        }

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

        .step-number {
            width: 40px;
            height: 40px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 650;
            margin: 0 auto 20px;
            box-shadow: 0 4px 10px rgba(59, 124, 166, 0.3);
        }

        .process-step h3 {
            font-size: 18px;
            font-weight: 650;
            color: var(--text);
            margin-bottom: 10px;
        }

        .process-step p {
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.7;
        }

        /* FAQ */
        .faq-section {
            padding: var(--space-section) 0;
            background: var(--bg-blue);
            border-top: 1px solid var(--border);
        }

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

        .faq-item {
            background: var(--surface);
            border: 1px solid var(--border);
            border-radius: var(--radius-card);
            margin-bottom: 12px;
            overflow: hidden;
            box-shadow: 0 2px 6px rgba(20, 45, 70, 0.03);
        }

        .faq-question {
            width: 100%;
            padding: 18px 20px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            font-size: 16px;
            font-weight: 500;
            color: var(--text);
            text-align: left;
            cursor: pointer;
            transition: background 0.2s ease;
            background: transparent;
            border: none;
        }

        .faq-question:hover {
            background: var(--primary-light);
        }

        .faq-icon {
            width: 20px;
            height: 20px;
            position: relative;
            flex-shrink: 0;
        }

        .faq-icon::before,
        .faq-icon::after {
            content: "";
            position: absolute;
            background: var(--primary);
            border-radius: 2px;
            transition: transform 0.3s ease;
        }

        .faq-icon::before {
            width: 12px;
            height: 2px;
            top: 9px;
            left: 4px;
        }

        .faq-icon::after {
            width: 2px;
            height: 12px;
            top: 4px;
            left: 9px;
        }

        .faq-item.open .faq-icon::after {
            transform: scaleY(0);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.3s ease;
            padding: 0 20px;
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.7;
        }

        .faq-item.open .faq-answer {
            max-height: 400px;
            padding: 4px 20px 20px;
            background: var(--bg-blue);
            border-top: 1px solid var(--border);
        }

        /* CTA */
        .cta-section {
            padding: 64px 0 var(--space-section);
            background: var(--bg);
        }

        .cta-card {
            background: var(--primary-dark);
            border-radius: var(--radius-panel);
            padding: 56px 48px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 32px;
            flex-wrap: wrap;
            box-shadow: 0 16px 40px rgba(30, 74, 110, 0.25);
            position: relative;
            overflow: hidden;
        }

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

        .cta-content {
            flex: 1;
            min-width: 260px;
        }

        .cta-content h2 {
            color: #fff;
            font-size: 24px;
            font-weight: 650;
            margin-bottom: 12px;
            line-height: 1.4;
        }

        .cta-content p {
            color: #C3D7E8;
            font-size: 16px;
            max-width: 480px;
            line-height: 1.7;
        }

        .cta-actions {
            flex-shrink: 0;
            display: flex;
            gap: 16px;
            flex-wrap: wrap;
        }

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

        .btn-white:hover {
            background: var(--primary-light);
            color: var(--primary-dark);
            transform: translateY(1px);
        }

        .btn-white:focus {
            outline: none;
            box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.5);
        }

        .btn-outline-light {
            background: transparent;
            color: #fff;
            border-color: rgba(255, 255, 255, 0.5);
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: #fff;
            color: #fff;
        }

        .btn-outline-light:focus {
            outline: none;
            box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.3);
        }

        /* Footer */
        .site-footer {
            background: var(--primary-dark);
            padding: 64px 0 0;
            color: #C3D7E8;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 1.2fr 0.8fr 1fr;
            gap: 48px;
            padding-bottom: 40px;
        }

        .footer-logo {
            font-size: 20px;
            font-weight: 650;
            color: #fff;
            display: flex;
            align-items: center;
            gap: 10px;
            margin-bottom: 16px;
        }

        .footer-logo::before {
            content: "";
            width: 24px;
            height: 24px;
            background: var(--primary);
            border-radius: 6px;
            display: inline-block;
            flex-shrink: 0;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: #A9C3D8;
            max-width: 320px;
        }

        .footer-nav h4,
        .footer-contact h4 {
            color: #fff;
            font-size: 16px;
            font-weight: 600;
            margin-bottom: 16px;
        }

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

        .footer-nav ul a {
            color: #A9C3D8;
            font-size: 14px;
            transition: color 0.2s ease;
        }

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

        .footer-contact p {
            font-size: 14px;
            line-height: 1.7;
            color: #A9C3D8;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.15);
            padding: 20px 0;
            text-align: center;
        }

        .footer-bottom p {
            font-size: 14px;
            color: rgba(195, 215, 232, 0.75);
        }

        /* Responsive */
        @media (max-width: 1023px) {
            .header-inner {
                gap: 16px;
            }

            .main-nav {
                order: 3;
                width: 100%;
                flex-basis: 100%;
                justify-content: flex-start;
                overflow-x: auto;
                padding-bottom: 4px;
            }

            .nav-pill {
                flex-shrink: 0;
                height: 40px;
                font-size: 13px;
                padding: 0 14px;
            }

            .scenario-card,
            .scenario-card:nth-child(even) {
                flex-direction: column;
                gap: 24px;
                padding: 24px;
            }

            .scenario-image img {
                height: 240px;
            }

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

            .process-grid {
                grid-template-columns: 1fr;
                gap: 20px;
            }

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

            .cta-card {
                padding: 40px 32px;
            }
        }

        @media (max-width: 767px) {
            :root {
                --space-section: 56px;
            }

            .container {
                padding: 0 16px;
            }

            .header-inner {
                flex-wrap: wrap;
                padding: 0 16px;
                gap: 12px;
            }

            .site-logo .logo-text {
                font-size: 16px;
            }

            .site-logo .logo-slogan {
                font-size: 11px;
            }

            .logo-mark {
                width: 38px;
                height: 38px;
            }

            .nav-toggle {
                display: flex;
                margin-left: auto;
            }

            .main-nav {
                display: none;
                flex-direction: column;
                width: 100%;
                flex-basis: 100%;
                gap: 8px;
                overflow: visible;
                padding: 12px 0 0;
            }

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

            .nav-pill {
                width: 100%;
                justify-content: center;
                height: 44px;
            }

            .nav-cta {
                display: none;
            }

            .page-hero {
                padding: 48px 0 40px;
            }

            .page-hero h1 {
                font-size: 28px;
            }

            .page-hero-abstract {
                font-size: 16px;
            }

            .hero-actions {
                flex-direction: column;
                gap: 12px;
            }

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

            .hero-entry-card {
                padding: 14px;
                justify-content: flex-start;
            }

            .entry-item {
                font-size: 13px;
                padding: 8px 12px;
            }

            .section-header h2 {
                font-size: 24px;
            }

            .scenario-card {
                padding: 16px;
            }

            .scenario-image img {
                height: 180px;
            }

            .scenario-content h3 {
                font-size: 18px;
            }

            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }

            .stat-number {
                font-size: 28px;
            }

            .stats-section {
                padding: 56px 0;
            }

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

            .cta-card {
                flex-direction: column;
                text-align: center;
                padding: 32px 24px;
            }

            .cta-actions {
                width: 100%;
                flex-direction: column;
            }

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

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

        @media (max-width: 520px) {
            .hero-entry-card {
                flex-direction: column;
                align-items: stretch;
            }

            .entry-item {
                justify-content: center;
            }

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

            .process-step {
                padding: 24px 20px;
            }
        }

/* roulang page: category3 */
:root {
  --primary: #3B7CA6;
  --primary-soft: #EAF2F8;
  --primary-dark: #1E4A6E;
  --accent: #B8693A;
  --accent-light: #C47A3A;
  --bg: #FAFAF7;
  --bg-blue: #F0F6FB;
  --surface: #FFFFFF;
  --text: #1F2B36;
  --text-muted: #5C6B7A;
  --border: #E5E9EF;
  --success: #2E7D5B;
  --warning: #B8693A;
  --error: #C24C34;
  --radius-lg: 12px;
  --radius-md: 8px;
  --radius-pill: 999px;
  --shadow-sm: 0 2px 8px rgba(20,45,70,0.05), 0 6px 20px rgba(20,45,70,0.06);
  --shadow-lg: 0 8px 28px rgba(20,45,70,0.10);
  --shadow-hero: 0 12px 32px rgba(30,74,110,0.15);
  --spacing-4: 4px;
  --spacing-8: 8px;
  --spacing-16: 16px;
  --spacing-24: 24px;
  --spacing-40: 40px;
  --spacing-56: 56px;
  --spacing-96: 96px;
  --container: 1200px;
  --font-sans: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body { font-family: var(--font-sans); background: var(--bg); color: var(--text); font-size: 16px; line-height: 1.75; -webkit-font-smoothing: antialiased; }
img { max-width: 100%; display: block; }
a { color: var(--primary); text-decoration: none; transition: color 0.25s ease; }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea { font-family: inherit; }
.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.btn { display: inline-flex; align-items: center; justify-content: center; height: 44px; padding: 0 24px; border-radius: var(--radius-md); font-size: 15px; font-weight: 600; transition: all 0.25s ease; text-align: center; white-space: nowrap; }
.btn-primary { background: var(--primary); color: #fff; border: 1px solid transparent; }
.btn-primary:hover { background: var(--primary-dark); color: #fff; transform: translateY(1px); box-shadow: 0 6px 16px rgba(30,74,110,0.18); }
.btn-primary:focus-visible { outline: 2px solid rgba(59,124,166,0.4); outline-offset: 2px; }
.btn-primary:active { background: #173A54; transform: translateY(1px); }
.btn-secondary { background: transparent; color: var(--primary-dark); border: 1px solid #B8C9D8; }
.btn-secondary:hover { border-color: var(--primary); background: var(--primary-soft); color: var(--primary-dark); }
.btn-sm { height: 40px; padding: 0 18px; font-size: 14px; }
.btn-lg { height: 52px; padding: 0 32px; font-size: 16px; }
.btn-block { width: 100%; }

/* ===== Header & Nav ===== */
.site-header { position: relative; z-index: 50; padding: 16px 0 0; }
.header-inner { max-width: var(--container); margin: 0 auto; padding: 12px 16px; display: flex; align-items: center; justify-content: space-between; gap: 16px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); box-shadow: 0 4px 16px rgba(20,45,70,0.06); }
.site-logo { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.logo-mark { width: 40px; height: 40px; border-radius: var(--radius-md); background: var(--primary-soft); display: flex; align-items: center; justify-content: center; }
.logo-mark svg { width: 22px; height: 22px; fill: var(--primary); }
.logo-text { display: block; font-size: 17px; font-weight: 650; color: var(--primary-dark); line-height: 1.2; letter-spacing: 0; }
.logo-slogan { display: block; font-size: 12px; color: var(--text-muted); line-height: 1.4; margin-top: 2px; }
.main-nav { display: flex; align-items: center; gap: 10px; flex-wrap: wrap; }
.nav-pill { display: inline-flex; align-items: center; justify-content: center; height: 44px; padding: 0 16px; border-radius: var(--radius-md); font-size: 14px; font-weight: 600; color: var(--primary-dark); background: var(--primary-soft); transition: all 0.25s ease; white-space: nowrap; }
.nav-pill:hover { background: #DCECF7; color: var(--primary-dark); transform: translateY(-1px); }
.nav-pill.active { background: var(--primary); color: #fff; pointer-events: none; }
.nav-cta { flex-shrink: 0; }
.nav-toggle { display: none; flex-direction: column; gap: 5px; width: 44px; height: 44px; border-radius: var(--radius-md); border: 1px solid var(--border); background: var(--surface); align-items: center; justify-content: center; }
.nav-toggle span { display: block; width: 20px; height: 2px; background: var(--primary-dark); border-radius: 2px; transition: all 0.3s ease; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ===== Breadcrumb ===== */
.breadcrumb { max-width: var(--container); margin: 24px auto 0; padding: 0 24px; font-size: 13px; color: var(--text-muted); }
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb span { margin: 0 8px; color: #C0CBD6; }

/* ===== Hero ===== */
.page-hero { background: linear-gradient(120deg, var(--bg) 60%, var(--bg-blue) 100%); padding: 64px 0 40px; position: relative; }
.page-hero-inner { display: grid; grid-template-columns: 1fr; gap: 32px; }
.hero-title { font-size: 36px; font-weight: 650; line-height: 1.25; color: var(--primary-dark); }
.hero-desc { margin-top: 16px; font-size: 18px; color: var(--text-muted); max-width: 680px; line-height: 1.75; }
.hero-actions { margin-top: 24px; display: flex; gap: 16px; flex-wrap: wrap; }
.entry-strip { margin-top: 40px; background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 24px; box-shadow: var(--shadow-sm); display: flex; flex-wrap: wrap; gap: 16px; }
.entry-item { display: flex; align-items: center; gap: 12px; padding: 14px 18px; background: var(--bg-blue); border-radius: var(--radius-md); border: 1px solid var(--border); min-width: 160px; flex: 1; transition: all 0.25s ease; }
.entry-item:hover { box-shadow: var(--shadow-sm); transform: translateY(-2px); border-color: var(--primary); }
.entry-icon { width: 36px; height: 36px; border-radius: 10px; background: var(--primary-soft); display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.entry-icon svg { width: 18px; height: 18px; fill: var(--primary); }
.entry-text { font-size: 14px; font-weight: 600; color: var(--primary-dark); }
.entry-sub { font-size: 12px; color: var(--text-muted); }

/* ===== Section ===== */
.section { padding: var(--spacing-96) 0; }
.section-alt { background: var(--bg-blue); }
.section-head { max-width: 720px; margin-bottom: var(--spacing-40); }
.section-title { font-size: 28px; font-weight: 650; line-height: 1.3; color: var(--primary-dark); }
.section-desc { margin-top: 12px; font-size: 16px; color: var(--text-muted); }

/* ===== Plans ===== */
.plans-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; align-items: stretch; }
.plan-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 28px 24px; display: flex; flex-direction: column; box-shadow: var(--shadow-sm); position: relative; transition: all 0.3s ease; }
.plan-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-2px); }
.plan-card.recommended { border-color: var(--primary); box-shadow: 0 8px 28px rgba(59,124,166,0.14); }
.plan-badge { position: absolute; top: -12px; right: 24px; background: var(--accent); color: #fff; font-size: 12px; font-weight: 600; padding: 4px 14px; border-radius: var(--radius-pill); box-shadow: 0 4px 8px rgba(184,105,58,0.25); }
.plan-name { font-size: 18px; font-weight: 650; color: var(--primary-dark); }
.plan-price { margin-top: 16px; display: flex; align-items: baseline; gap: 6px; }
.plan-price .currency { font-size: 16px; color: var(--text-muted); font-weight: 400; }
.plan-price .amount { font-size: 44px; font-weight: 700; color: var(--primary-dark); line-height: 1; letter-spacing: 0.02em; }
.plan-price .period { font-size: 14px; color: var(--text-muted); }
.plan-desc { margin-top: 12px; font-size: 14px; color: var(--text-muted); line-height: 1.6; }
.plan-features { margin-top: 20px; border-top: 1px solid var(--border); padding-top: 16px; display: flex; flex-direction: column; gap: 12px; flex: 1; }
.plan-feature { display: flex; align-items: flex-start; gap: 10px; font-size: 14px; color: var(--text); }
.plan-feature svg { width: 18px; height: 18px; fill: var(--success); flex-shrink: 0; margin-top: 3px; }
.plan-feature.disabled { color: #AAB4BF; }
.plan-feature.disabled svg { fill: #C0CBD6; }
.plan-cta { margin-top: 24px; }

/* ===== Pricing Note ===== */
.note-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; }
.note-media { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-sm); }
.note-media img { width: 100%; height: 380px; object-fit: cover; }
.note-content { display: flex; flex-direction: column; gap: 16px; }
.note-head { font-size: 20px; font-weight: 650; color: var(--primary-dark); }
.note-list { display: flex; flex-direction: column; gap: 14px; }
.note-item { display: flex; gap: 18px; padding: 18px 20px; background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius-md); transition: all 0.25s ease; }
.note-item:hover { border-color: var(--primary); background: var(--surface); box-shadow: var(--shadow-sm); }
.note-item-icon { width: 44px; height: 44px; border-radius: 10px; background: var(--primary-soft); display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.note-item-icon svg { width: 22px; height: 22px; fill: var(--primary); }
.note-item-title { font-size: 15px; font-weight: 600; color: var(--text); }
.note-item-desc { font-size: 14px; color: var(--text-muted); margin-top: 2px; line-height: 1.6; }

/* ===== Guide ===== */
.guide-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.guide-card { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); padding: 24px; box-shadow: var(--shadow-sm); transition: all 0.3s ease; position: relative; }
.guide-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-2px); }
.guide-num { display: inline-flex; align-items: center; justify-content: center; width: 36px; height: 36px; border-radius: 50%; background: var(--primary-soft); color: var(--primary); font-size: 15px; font-weight: 700; margin-bottom: 16px; }
.guide-card-title { font-size: 18px; font-weight: 650; color: var(--primary-dark); }
.guide-card-desc { margin-top: 10px; font-size: 14px; color: var(--text-muted); line-height: 1.7; }

/* ===== FAQ ===== */
.faq-list { max-width: 860px; margin: 0 auto; }
.faq-item { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius-lg); margin-bottom: 12px; overflow: hidden; transition: all 0.25s ease; }
.faq-item.open { box-shadow: var(--shadow-sm); border-color: var(--primary); }
.faq-question { display: flex; justify-content: space-between; align-items: center; padding: 18px 22px; cursor: pointer; font-size: 16px; font-weight: 600; color: var(--text); transition: background 0.2s ease; }
.faq-question:hover { background: var(--bg-blue); }
.faq-question .faq-icon { width: 28px; height: 28px; border-radius: 6px; background: var(--primary-soft); display: flex; align-items: center; justify-content: center; flex-shrink: 0; transition: transform 0.3s ease, background 0.3s ease; }
.faq-item.open .faq-icon { transform: rotate(45deg); background: var(--primary); }
.faq-item.open .faq-icon svg { fill: #fff; }
.faq-icon svg { width: 14px; height: 14px; fill: var(--primary); }
.faq-answer { display: none; padding: 0 22px 20px; font-size: 15px; color: var(--text-muted); line-height: 1.75; }
.faq-item.open .faq-answer { display: block; }

/* ===== CTA ===== */
.cta-section { padding: 40px 0 96px; }
.cta-card { background: var(--primary-dark); border-radius: 16px; padding: 56px; position: relative; overflow: hidden; color: #fff; display: flex; align-items: center; justify-content: space-between; gap: 40px; }
.cta-card::before { content: ""; position: absolute; inset: 0; background-image: url('/assets/images/backpic/back-2.png'); background-size: cover; background-position: center; opacity: 0.12; }
.cta-content { position: relative; z-index: 1; }
.cta-title { font-size: 28px; font-weight: 650; color: #fff; }
.cta-desc { margin-top: 12px; font-size: 15px; color: var(--primary-soft); opacity: 0.85; max-width: 560px; line-height: 1.7; }
.cta-actions { position: relative; z-index: 1; display: flex; gap: 16px; flex-shrink: 0; }

/* ===== Footer ===== */
.site-footer { background: var(--primary-dark); color: #C3D7E8; padding: 56px 0 24px; border-radius: 24px 24px 0 0; margin-top: 24px; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 40px; padding-bottom: 32px; border-bottom: 1px solid rgba(195,215,232,0.18); }
.footer-brand .footer-logo { font-size: 20px; font-weight: 650; color: #fff; }
.footer-brand p { margin-top: 12px; font-size: 14px; color: #A8C3D8; line-height: 1.7; max-width: 320px; }
.footer-nav h4, .footer-contact h4 { font-size: 15px; font-weight: 600; color: #fff; margin-bottom: 16px; }
.footer-nav ul { display: flex; flex-direction: column; gap: 10px; }
.footer-nav a { color: #B3CCDF; font-size: 14px; transition: all 0.25s ease; }
.footer-nav a:hover { color: #fff; padding-left: 4px; }
.footer-contact p { font-size: 14px; color: #A8C3D8; line-height: 1.7; max-width: 240px; }
.footer-bottom { padding-top: 24px; text-align: center; font-size: 14px; color: rgba(195,215,232,0.65); }

/* ===== Scrollbar ===== */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: #B8C9D8; border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--primary); }

/* ===== Responsive ===== */
@media (max-width: 1023px) {
    .plans-grid { grid-template-columns: repeat(2, 1fr); }
    .guide-grid { grid-template-columns: repeat(2, 1fr); }
    .note-grid { grid-template-columns: 1fr; }
    .note-media img { height: 300px; }
    .cta-card { flex-direction: column; padding: 40px 28px; align-items: flex-start; }
    .hero-title { font-size: 32px; }
}

@media (max-width: 767px) {
    .container { padding: 0 16px; }
    .header-inner { padding: 12px; flex-wrap: wrap; }
    .main-nav { display: none; width: 100%; flex-direction: column; align-items: stretch; gap: 8px; padding-top: 12px; border-top: 1px solid var(--border); }
    .main-nav.open { display: flex; }
    .nav-pill { justify-content: center; width: 100%; }
    .nav-cta { display: none; }
    .nav-toggle { display: flex; }
    .section { padding: 56px 0; }
    .section-title { font-size: 24px; }
    .hero-title { font-size: 28px; }
    .hero-desc { font-size: 16px; }
    .plans-grid { grid-template-columns: 1fr; }
    .guide-grid { grid-template-columns: 1fr; }
    .cta-card { padding: 32px 24px; }
    .cta-actions { flex-direction: column; width: 100%; }
    .cta-actions .btn { width: 100%; }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .entry-strip { flex-direction: column; }
    .breadcrumb { padding: 0 16px; }
}

@media (max-width: 520px) {
    .hero-actions { flex-direction: column; width: 100%; }
    .hero-actions .btn { width: 100%; }
    .note-media img { height: 220px; }
    .plan-price .amount { font-size: 36px; }
}