/* roulang page: index */
/* ===== 设计变量与Reset ===== */
:root {
  --primary: #1D6FF2;
  --primary-dark: #155BD8;
  --primary-light: rgba(29,111,242,0.12);
  --accent: #FF7A1A;
  --accent-light: #FF9A3D;
  --success: #10B981;
  --bg: #F6F9FE;
  --card-bg: #FFFFFF;
  --title: #17233D;
  --text: #3D4C66;
  --muted: #7A879E;
  --border: #E4ECF7;
  --disabled: #C0CDE0;
  --radius-sm: 10px;
  --radius-lg: 16px;
  --radius-pill: 999px;
  --shadow-card: 0 2px 8px rgba(23,35,61,0.06);
  --shadow-hover: 0 12px 32px rgba(29,111,242,0.14);
  --shadow-nav: 0 8px 24px rgba(23,35,61,0.10);
  --container-w: 1200px;
  --section-pad: clamp(3.5rem, 8vw, 6.5rem);
  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
  --font-num: "DIN Alternate", "Bahnschrift", monospace;
}
*, *::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: var(--primary); text-decoration: none; transition: color .2s ease; }
a:hover { color: var(--primary-dark); }
ul, ol { list-style: none; }
.container { max-width: var(--container-w); margin: 0 auto; padding: 0 24px; }
.text-center { text-align: center; }

/* ===== 按钮 ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 8px; padding: 12px 24px; border-radius: var(--radius-sm);
  font-size: 15px; font-weight: 600; line-height: 1.4; cursor: pointer;
  border: 1px solid transparent; transition: all .25s ease;
  text-align: center; white-space: nowrap;
}
.btn:focus { outline: 4px solid rgba(29,111,242,0.12); outline-offset: 1px; }
.btn:active { transform: translateY(1px); }
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 4px 12px rgba(29,111,242,0.22); }
.btn-primary:hover { background: var(--primary-dark); color: #fff; box-shadow: 0 8px 20px rgba(29,111,242,0.28); transform: translateY(-2px); }
.btn-outline { background: #fff; border-color: var(--primary); color: var(--primary); }
.btn-outline:hover { background: var(--primary-light); color: var(--primary-dark); transform: translateY(-2px); }
.btn-accent { background: var(--accent); color: #fff; box-shadow: 0 4px 14px rgba(255,122,26,0.28); }
.btn-accent:hover { background: var(--accent-light); color: #fff; box-shadow: 0 8px 22px rgba(255,122,26,0.32); transform: translateY(-2px); }
.btn-lg { padding: 15px 34px; font-size: 17px; border-radius: 12px; }
.btn-sm { padding: 8px 18px; font-size: 14px; }
.btn-block { width: 100%; }

/* ===== 徽章 / 标签 ===== */
.badge {
  display: inline-block; padding: 4px 14px; border-radius: var(--radius-pill);
  font-size: 12px; font-weight: 600; letter-spacing: .4px;
  background: rgba(29,111,242,0.12); color: var(--primary);
}
.section-tag {
  display: inline-block; padding: 5px 16px; border-radius: var(--radius-pill);
  font-size: 13px; font-weight: 600; letter-spacing: 1px;
  background: var(--primary-light); color: var(--primary); margin-bottom: 14px;
}

/* ===== 导航胶囊 ===== */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  padding: 16px 24px 0; pointer-events: none;
  transition: padding .3s ease;
}
.site-header.scrolled { padding-top: 8px; }
.navbar {
  max-width: var(--container-w); margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  gap: 20px; padding: 10px 22px;
  background: rgba(246,249,254,0.85);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,0.6);
  border-radius: var(--radius-pill);
  box-shadow: var(--shadow-nav);
  pointer-events: auto;
  transition: padding .3s ease, background .3s ease;
}
.site-header.scrolled .navbar { padding: 6px 18px; background: rgba(246,249,254,0.95); }
.brand {
  display: flex; align-items: center; gap: 10px;
  font-size: 20px; font-weight: 800; color: var(--title);
  flex-shrink: 0;
}
.brand-icon {
  width: 38px; height: 38px; border-radius: 50%;
  background: linear-gradient(135deg, var(--primary) 0%, #4a9aff 100%);
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 16px;
  box-shadow: 0 4px 10px rgba(29,111,242,0.3);
}
.brand-text { letter-spacing: .5px; }
.nav-list { display: flex; align-items: center; gap: 4px; list-style: none; }
.nav-link {
  display: inline-block; padding: 8px 18px; border-radius: var(--radius-pill);
  font-size: 14px; font-weight: 600; color: var(--text);
  transition: all .2s ease;
}
.nav-link:hover { background: var(--primary-light); color: var(--primary); }
.nav-link.active { background: var(--primary); color: #fff; box-shadow: 0 4px 12px rgba(29,111,242,0.25); }
.nav-right { display: flex; align-items: center; gap: 12px; }
.nav-toggle {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 8px;
}
.nav-toggle span {
  width: 22px; height: 2px; background: var(--title);
  border-radius: 2px; transition: all .3s ease;
}
.nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav-toggle.active span:nth-child(2) { opacity: 0; }
.nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ===== Hero ===== */
.hero {
  position: relative; min-height: 82vh;
  display: flex; align-items: center;
  background: linear-gradient(100deg, rgba(246,249,254,0.92) 0%, rgba(246,249,254,0.72) 55%, rgba(246,249,254,0.6) 100%),
              url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  padding: 140px 0 90px;
  overflow: hidden;
}
.hero::before {
  content: ''; position: absolute; right: -120px; top: 20%;
  width: 420px; height: 420px; border-radius: 50%;
  border: 2px solid rgba(29,111,242,0.08);
  pointer-events: none;
}
.hero::after {
  content: ''; position: absolute; right: 80px; bottom: 10%;
  width: 180px; height: 180px; border-radius: 50%;
  border: 2px solid rgba(255,122,26,0.10);
  pointer-events: none;
}
.hero-inner { position: relative; z-index: 2; }
.hero-content { max-width: 640px; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 18px; border-radius: var(--radius-pill);
  background: rgba(255,255,255,0.85); border: 1px solid var(--border);
  font-size: 14px; font-weight: 600; color: var(--title);
  box-shadow: 0 2px 8px rgba(23,35,61,0.05);
  margin-bottom: 22px;
}
.pulse-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--success); position: relative;
}
.pulse-dot::after {
  content: ''; position: absolute; inset: -3px;
  border-radius: 50%; border: 2px solid var(--success);
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0% { transform: scale(0.6); opacity: 1; }
  70% { transform: scale(1.6); opacity: 0; }
  100% { opacity: 0; }
}
.hero-title {
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 800; line-height: 1.25; color: var(--title);
  margin-bottom: 18px; letter-spacing: -0.5px;
}
.hero-subtitle {
  font-size: 17px; line-height: 1.8; color: var(--text);
  margin-bottom: 32px; max-width: 560px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 36px; }
.hero-trust {
  display: flex; flex-wrap: wrap; gap: 24px;
  font-size: 13px; color: var(--muted);
}
.hero-trust span { display: inline-flex; align-items: center; gap: 6px; }
.hero-trust i { color: var(--primary); font-size: 14px; }

/* ===== Stats ===== */
.stats-section {
  padding: 60px 0; background: #fff;
  border-bottom: 1px solid var(--border);
}
.stats-grid { align-items: center; }
.stat-item {
  text-align: center; padding: 24px 12px; position: relative;
}
.stat-item::after {
  content: ''; position: absolute; right: 0; top: 50%;
  transform: translateY(-50%);
  width: 1px; height: 56px; background: var(--border);
}
.stat-item:last-child::after { display: none; }
.stat-number {
  font-family: var(--font-num);
  font-size: clamp(32px, 4vw, 46px);
  font-weight: 700; color: var(--accent);
  line-height: 1.2; letter-spacing: 1px;
}
.stat-number span { font-size: 0.5em; margin-left: 2px; color: var(--muted); }
.stat-label {
  font-size: 14px; color: var(--muted); margin-top: 8px;
}

/* ===== 通用Section ===== */
.section { padding: var(--section-pad) 0; }
.section-head { max-width: 640px; margin-bottom: 48px; }
.section-head.center-head { margin-left: auto; margin-right: auto; text-align: center; }
.section-head h2 {
  font-size: clamp(26px, 3.5vw, 36px);
  font-weight: 700; line-height: 1.3; color: var(--title);
  margin-bottom: 12px; letter-spacing: -0.3px;
}
.section-head p { font-size: 16px; color: var(--muted); line-height: 1.7; }

/* ===== 功能分组 ===== */
.features-section { background: var(--bg); }
.features-layout {
  display: grid; grid-template-columns: 1.4fr 1fr; gap: 24px;
  margin-bottom: 24px;
}
.feature-main {
  background: var(--card-bg); border-radius: var(--radius-lg);
  padding: 32px; border: 1px solid var(--border);
  box-shadow: var(--shadow-card); transition: all .3s ease;
  display: flex; flex-direction: column;
}
.feature-main:hover {
  box-shadow: var(--shadow-hover); transform: translateY(-4px);
  border-color: rgba(29,111,242,0.3);
}
.feature-main img { border-radius: 12px; margin: 24px 0 18px; object-fit: cover; height: 220px; width: 100%; }
.feature-main h3 { font-size: 24px; font-weight: 700; color: var(--title); margin-top: 20px; }
.feature-main p { color: var(--text); margin: 10px 0 16px; flex-grow: 1; }
.feature-icon {
  width: 48px; height: 48px; border-radius: var(--radius-sm);
  background: var(--primary-light); color: var(--primary);
  display: flex; align-items: center; justify-content: center;
  font-size: 20px;
}
.feature-icon.lg { width: 56px; height: 56px; font-size: 24px; }
.feature-side { display: flex; flex-direction: column; gap: 24px; }
.feature-mini {
  flex: 1; background: var(--card-bg); border-radius: var(--radius-lg);
  padding: 28px; border: 1px solid var(--border); box-shadow: var(--shadow-card);
  transition: all .3s ease; display: flex; gap: 18px; align-items: flex-start;
}
.feature-mini:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); border-color: rgba(29,111,242,0.3); }
.feature-mini h4 { font-size: 18px; font-weight: 600; color: var(--title); margin-bottom: 8px; }
.feature-mini p { font-size: 14px; color: var(--muted); margin-bottom: 8px; line-height: 1.6; }
.text-link { font-size: 14px; font-weight: 600; display: inline-flex; align-items: center; gap: 4px; }
.text-link i { font-size: 12px; transition: transform .2s ease; }
.text-link:hover i { transform: translateX(4px); }
.feature-strip {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px;
}
.feature-strip-item {
  background: #fff; border: 1px solid var(--border);
  border-radius: var(--radius-sm); padding: 18px 20px;
  display: flex; align-items: center; gap: 12px;
  font-size: 14px; font-weight: 600; color: var(--title);
  box-shadow: var(--shadow-card); transition: all .3s ease;
}
.feature-strip-item:hover { box-shadow: var(--shadow-hover); transform: translateY(-2px); border-color: rgba(29,111,242,0.3); }
.feature-strip-item i { color: var(--primary); font-size: 18px; width: 24px; text-align: center; }

/* ===== 场景 ===== */
.scenarios-section { background: #fff; }
.scenario-block {
  display: grid; grid-template-columns: 1.1fr 1fr; gap: 48px;
  align-items: center; margin-bottom: 64px;
}
.scenario-block.reverse .scenario-img { order: 2; }
.scenario-block.reverse .scenario-content { order: 1; }
.scenario-img {
  border-radius: var(--radius-lg); overflow: hidden;
  box-shadow: var(--shadow-card); border: 1px solid var(--border);
}
.scenario-img img { width: 100%; height: 320px; object-fit: cover; transition: transform .4s ease; }
.scenario-img:hover img { transform: scale(1.04); }
.scenario-num {
  font-family: var(--font-num); font-size: 72px; font-weight: 800;
  color: rgba(29,111,242,0.12); line-height: 1; display: block; margin-bottom: 8px;
}
.scenario-num.light { color: rgba(255,255,255,0.2); }
.scenario-content h3 { font-size: 26px; font-weight: 700; color: var(--title); margin-bottom: 14px; }
.scenario-content p { color: var(--text); margin-bottom: 20px; font-size: 16px; line-height: 1.8; }
.scenario-banner {
  background: linear-gradient(120deg, #1D6FF2 0%, #3a86f8 60%, #5ea0ff 100%);
  padding: 80px 0; text-align: center;
}
.scenario-banner-inner { position: relative; }
.scenario-banner-card {
  max-width: 520px; margin: 0 auto; padding: 44px 40px;
  background: rgba(255,255,255,0.12); border: 1px solid rgba(255,255,255,0.25);
  border-radius: var(--radius-lg); backdrop-filter: blur(8px);
}
.scenario-banner-card h3 { color: #fff; font-size: 28px; font-weight: 700; margin-bottom: 12px; }
.scenario-banner-card p { color: rgba(255,255,255,0.9); margin-bottom: 24px; }

/* ===== 案例 ===== */
.cases-section { background: var(--bg); }
.cases-grid { align-items: stretch; }
.case-card {
  background: var(--card-bg); border-radius: var(--radius-lg);
  overflow: hidden; border: 1px solid var(--border);
  box-shadow: var(--shadow-card); transition: all .3s ease;
  height: 100%; display: flex; flex-direction: column;
}
.case-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); border-color: rgba(29,111,242,0.3); }
.case-img { position: relative; overflow: hidden; }
.case-img img { width: 100%; height: 220px; object-fit: cover; transition: transform .4s ease; }
.case-card:hover .case-img img { transform: scale(1.05); }
.case-badge {
  position: absolute; top: 14px; left: 14px;
  padding: 5px 14px; border-radius: var(--radius-pill);
  background: rgba(255,255,255,0.92); color: var(--primary);
  font-size: 12px; font-weight: 700;
}
.case-body { padding: 24px; flex-grow: 1; display: flex; flex-direction: column; }
.case-metric {
  font-family: var(--font-num); font-size: 40px; font-weight: 800;
  color: var(--accent); line-height: 1.1; margin-bottom: 8px;
}
.case-body h3 { font-size: 20px; font-weight: 700; color: var(--title); margin-bottom: 8px; }
.case-body p { color: var(--muted); font-size: 15px; line-height: 1.7; }

/* ===== 服务方案 ===== */
.pricing-section { background: #fff; }
.pricing-grid { align-items: stretch; }
.price-card {
  background: var(--card-bg); border-radius: var(--radius-lg);
  padding: 36px 30px; border: 1px solid var(--border);
  box-shadow: var(--shadow-card); transition: all .3s ease;
  height: 100%; display: flex; flex-direction: column; position: relative;
}
.price-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); border-color: rgba(29,111,242,0.25); }
.price-card.featured {
  border: 2px solid var(--primary); background: linear-gradient(180deg, rgba(29,111,242,0.03) 0%, #fff 40%);
  box-shadow: var(--shadow-hover);
}
.price-card.featured:hover { transform: translateY(-6px); }
.price-tag {
  position: absolute; top: -12px; left: 50%; transform: translateX(-50%);
  background: var(--accent); color: #fff; font-size: 12px; font-weight: 700;
  padding: 5px 18px; border-radius: var(--radius-pill);
  box-shadow: 0 3px 10px rgba(255,122,26,0.3);
}
.price-name { font-size: 20px; font-weight: 700; color: var(--title); margin-bottom: 14px; }
.price-amount {
  font-family: var(--font-num); font-size: 48px; font-weight: 800;
  color: var(--title); line-height: 1.2; margin-bottom: 24px;
}
.price-amount .currency { font-size: 22px; vertical-align: super; color: var(--muted); }
.price-amount .per { font-size: 14px; font-weight: 400; color: var(--muted); margin-left: 4px; }
.price-features { margin-bottom: 28px; flex-grow: 1; }
.price-features li {
  padding: 8px 0; font-size: 15px; color: var(--text);
  display: flex; align-items: center; gap: 10px;
  border-bottom: 1px dashed var(--border);
}
.price-features li:last-child { border-bottom: none; }
.price-features li i { color: var(--success); width: 18px; text-align: center; font-size: 13px; }

/* ===== 资讯区 ===== */
.info-section { background: var(--bg); }
.info-grid { align-items: stretch; }
.info-card {
  background: var(--card-bg); border-radius: var(--radius-lg);
  overflow: hidden; border: 1px solid var(--border);
  box-shadow: var(--shadow-card); transition: all .3s ease;
  height: 100%; display: flex; flex-direction: column;
}
.info-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); border-color: rgba(29,111,242,0.25); }
.info-cover { position: relative; overflow: hidden; }
.info-cover img { width: 100%; height: 190px; object-fit: cover; transition: transform .4s ease; }
.info-card:hover .info-cover img { transform: scale(1.05); }
.info-cover .badge { position: absolute; top: 12px; left: 12px; background: rgba(255,255,255,0.92); }
.info-body { padding: 22px 24px; display: flex; flex-direction: column; flex-grow: 1; }
.info-title {
  font-size: 18px; font-weight: 600; line-height: 1.5; color: var(--title);
  margin-bottom: 10px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.info-title a { color: inherit; transition: color .2s; }
.info-title a:hover { color: var(--primary); }
.info-summary {
  font-size: 14px; color: var(--muted); line-height: 1.7;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
  margin-bottom: 16px; flex-grow: 1;
}
.info-meta {
  display: flex; align-items: center; justify-content: space-between;
  border-top: 1px solid var(--border); padding-top: 14px;
}
.info-time { font-size: 13px; color: var(--muted); display: inline-flex; align-items: center; gap: 5px; }
.read-more { font-size: 14px; font-weight: 600; display: inline-flex; align-items: center; gap: 5px; }
.read-more i { font-size: 12px; transition: transform .2s ease; }
.read-more:hover i { transform: translateX(4px); }
.empty-state {
  padding: 60px 20px; text-align: center; border-radius: var(--radius-lg);
  background: #fff; border: 1px dashed var(--border);
}
.empty-state i { font-size: 42px; color: var(--disabled); margin-bottom: 16px; }
.empty-state p { color: var(--muted); margin-bottom: 20px; font-size: 15px; }

/* ===== FAQ ===== */
.faq-section { background: #fff; }
.faq-list { max-width: 760px; margin: 0 auto; }
.accordion-item {
  background: var(--card-bg); border: 1px solid var(--border);
  border-radius: 12px; margin-bottom: 14px; overflow: hidden;
  transition: border-color .3s ease, box-shadow .3s ease;
}
.accordion-item.is-active { border-color: rgba(29,111,242,0.35); box-shadow: 0 4px 16px rgba(29,111,242,0.08); }
.accordion-title {
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px 24px; font-size: 17px; font-weight: 600; color: var(--title);
  cursor: pointer; transition: color .2s; position: relative;
}
.accordion-title::after {
  content: '+'; font-size: 24px; font-weight: 400; color: var(--primary);
  transition: transform .3s ease; line-height: 1;
}
.accordion-item.is-active .accordion-title::after { transform: rotate(45deg); }
.accordion-title:hover { color: var(--primary); }
.accordion-content { padding: 0 24px 22px; color: var(--text); font-size: 15px; line-height: 1.8; }

/* ===== CTA ===== */
.cta-section { background: var(--bg); padding: 30px 0 90px; }
.cta-banner {
  background: linear-gradient(120deg, rgba(29,111,242,0.06) 0%, rgba(29,111,242,0.12) 100%);
  border: 1px solid rgba(29,111,242,0.15);
  border-radius: var(--radius-lg); padding: 56px 40px;
  text-align: center; position: relative; overflow: hidden;
}
.cta-banner::before {
  content: ''; position: absolute; right: -40px; top: -40px;
  width: 180px; height: 180px; border-radius: 50%;
  border: 2px solid rgba(29,111,242,0.08);
}
.cta-banner h2 { font-size: clamp(26px, 3.5vw, 34px); font-weight: 800; color: var(--title); margin-bottom: 10px; }
.cta-banner p { color: var(--muted); margin-bottom: 28px; font-size: 16px; }

/* ===== 页脚 ===== */
.site-footer {
  background: #17233D; color: rgba(255,255,255,0.7);
  padding: 70px 0 0; margin-top: 0;
}
.footer-grid { padding-bottom: 48px; }
.footer-brand .brand { color: #fff; margin-bottom: 16px; }
.footer-brand p { font-size: 14px; line-height: 1.7; color: rgba(255,255,255,0.6); margin-bottom: 20px; max-width: 300px; }
.brand-light .brand-icon { background: linear-gradient(135deg, var(--accent), var(--accent-light)); }
.footer-social { display: flex; gap: 12px; }
.footer-social a {
  width: 38px; height: 38px; border-radius: 50%;
  background: rgba(255,255,255,0.08); color: rgba(255,255,255,0.7);
  display: flex; align-items: center; justify-content: center;
  font-size: 15px; transition: all .3s ease;
}
.footer-social a:hover { background: var(--accent); color: #fff; transform: translateY(-3px); }
.footer-col h4 {
  color: #fff; font-size: 16px; font-weight: 700; margin-bottom: 20px;
}
.footer-col a {
  display: block; color: rgba(255,255,255,0.6); font-size: 14px;
  margin-bottom: 12px; transition: all .2s;
}
.footer-col a:hover { color: #fff; padding-left: 4px; }
.footer-col p { color: rgba(255,255,255,0.6); font-size: 14px; margin-bottom: 12px; }
.footer-col p i { width: 20px; color: var(--accent); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 24px 0; text-align: center;
  font-size: 13px; color: rgba(255,255,255,0.45);
}

/* ===== 卡片通用hover ===== */
.card-hover { transition: box-shadow .3s ease, transform .3s ease, border-color .3s ease; }

/* ===== 响应式 ===== */
@media (max-width: 1023px) {
  .features-layout { grid-template-columns: 1fr 1fr; }
  .feature-strip { grid-template-columns: repeat(2, 1fr); }
  .scenario-block { grid-template-columns: 1fr; gap: 32px; }
  .scenario-block.reverse .scenario-img { order: 0; }
  .scenario-block.reverse .scenario-content { order: 0; }
  .scenario-img img { height: 260px; }
}
@media (max-width: 767px) {
  .nav-list {
    display: none; position: absolute; top: 70px; left: 16px; right: 16px;
    flex-direction: column; background: rgba(246,249,254,0.98);
    border-radius: 20px; padding: 20px; box-shadow: var(--shadow-nav);
    border: 1px solid var(--border); gap: 4px; z-index: 999;
  }
  .nav-list.open { display: flex; }
  .nav-toggle { display: flex; }
  .nav-cta { display: none; }
  .nav-link { padding: 12px 16px; font-size: 15px; }
  .hero { padding: 120px 0 70px; min-height: 65vh; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; }
  .hero-trust { gap: 14px; font-size: 12px; }
  .stat-item::after { display: none; }
  .stat-number { font-size: 32px; }
  .feature-strip { grid-template-columns: 1fr; }
  .feature-mini { padding: 20px; }
  .scenario-num { font-size: 56px; }
  .price-card { padding: 28px 22px; }
  .footer-grid { gap: 32px; }
  .footer-col { margin-bottom: 16px; }
  .cta-banner { padding: 40px 24px; }
  .accordion-title { padding: 16px 18px; font-size: 15px; }
  .accordion-content { padding: 0 18px 18px; }
  .section-head h2 { font-size: 26px; }
  .section-head p { font-size: 15px; }
}
@media (max-width: 519px) {
  .features-layout { grid-template-columns: 1fr; }
  .info-card { margin-bottom: 20px; }
  .scenario-img img { height: 220px; }
  .cta-banner h2 { font-size: 24px; }
  .btn { padding: 10px 18px; font-size: 14px; }
  .btn-lg { padding: 13px 26px; font-size: 15px; }
}

/* roulang page: category1 */
:root {
  --primary: #1D6FF2;
  --primary-dark: #155BD8;
  --accent: #FF7A1A;
  --accent-light: #FF9A3D;
  --success: #10B981;
  --bg-main: #F6F9FE;
  --bg-card: #FFFFFF;
  --text-title: #17233D;
  --text-body: #3D4C66;
  --text-muted: #7A879E;
  --border: #E4ECF7;
  --disabled: #C0CDE0;
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --shadow-card: 0 2px 8px rgba(23,35,61,0.06);
  --shadow-hover: 0 12px 32px rgba(29,111,242,0.14);
  --shadow-nav: 0 8px 24px rgba(23,35,61,0.10);
  --transition: all 0.3s ease;
  --font-main: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
  --font-num: "DIN Alternate", "Bahnschrift", monospace;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-main);
  background: var(--bg-main);
  color: var(--text-body);
  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: var(--transition); }
a:hover { color: var(--primary-dark); }
button { font-family: inherit; border: none; background: none; cursor: pointer; }
ul, ol { list-style: none; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.section { padding: clamp(3.5rem, 8vw, 6.5rem) 0; }
.section-alt { background: var(--bg-card); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section-head { text-align: center; max-width: 720px; margin: 0 auto clamp(2.5rem, 5vw, 3.5rem); }
.section-tag { display: inline-block; font-size: 13px; font-weight: 600; color: var(--primary); background: rgba(29,111,242,0.08); padding: 6px 16px; border-radius: 999px; margin-bottom: 16px; letter-spacing: 0.5px; }
.section-title { font-size: clamp(26px, 3.5vw, 36px); font-weight: 700; color: var(--text-title); line-height: 1.3; margin-bottom: 12px; }
.section-sub { font-size: 16px; color: var(--text-muted); line-height: 1.75; }

/* ===== 悬浮胶囊导航 ===== */
.site-header {
  position: fixed;
  top: 16px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1000;
  width: min(1200px, calc(100% - 32px));
}
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  background: rgba(246,249,254,0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255,255,255,0.6);
  border-radius: 999px;
  padding: 10px 14px 10px 24px;
  box-shadow: var(--shadow-nav);
  transition: var(--transition);
}
.site-header.scrolled .navbar { padding-top: 8px; padding-bottom: 8px; background: rgba(246,249,254,0.95); }
.brand { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.brand-icon {
  width: 36px; height: 36px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-size: 16px;
  box-shadow: 0 4px 12px rgba(29,111,242,0.3);
}
.brand-text { font-size: 20px; font-weight: 800; color: var(--text-title); letter-spacing: 0.5px; }
.nav-list { display: flex; align-items: center; gap: 4px; }
.nav-link {
  display: inline-block;
  padding: 8px 18px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-body);
  border-radius: 999px;
  transition: var(--transition);
  white-space: nowrap;
}
.nav-link:hover { color: var(--primary); background: rgba(29,111,242,0.08); }
.nav-link.active { color: #fff; background: var(--primary); box-shadow: 0 4px 12px rgba(29,111,242,0.25); }
.nav-right { display: flex; align-items: center; gap: 12px; }
.nav-cta.btn { padding: 8px 20px; font-size: 14px; border-radius: 999px; }
.nav-toggle {
  display: none;
  width: 40px; height: 40px;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  background: rgba(29,111,242,0.08);
  border-radius: 10px;
}
.nav-toggle span { display: block; width: 18px; height: 2px; background: var(--text-title); border-radius: 2px; transition: var(--transition); }

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  font-size: 15px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  border: 2px solid transparent;
  cursor: pointer;
  white-space: nowrap;
}
.btn-primary { background: var(--primary); color: #fff; box-shadow: 0 4px 16px rgba(29,111,242,0.28); }
.btn-primary:hover { background: var(--primary-dark); color: #fff; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(29,111,242,0.35); }
.btn-primary:active { transform: translateY(0); }
.btn-primary:focus-visible { outline: 4px solid rgba(29,111,242,0.12); outline-offset: 2px; }
.btn-outline { background: rgba(255,255,255,0.8); border-color: var(--primary); color: var(--primary); }
.btn-outline:hover { background: rgba(29,111,242,0.06); color: var(--primary-dark); transform: translateY(-2px); }
.btn-accent { background: linear-gradient(135deg, var(--accent), var(--accent-light)); color: #fff; box-shadow: 0 4px 16px rgba(255,122,26,0.3); }
.btn-accent:hover { color: #fff; transform: translateY(-2px); box-shadow: 0 8px 24px rgba(255,122,26,0.4); }
.btn-sm { padding: 8px 18px; font-size: 14px; }
.btn-large { padding: 16px 36px; font-size: 16px; }

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 80vh;
  display: flex;
  align-items: center;
  padding: 140px 0 80px;
  background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, rgba(246,249,254,0.92) 40%, rgba(246,249,254,0.55) 100%);
  z-index: 1;
}
.hero::after {
  content: '';
  position: absolute;
  width: 480px; height: 480px;
  border: 2px solid rgba(29,111,242,0.06);
  border-radius: 50%;
  top: -120px; right: -120px;
  z-index: 0;
}
.hero .container { position: relative; z-index: 2; }
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(255,255,255,0.85);
  border: 1px solid rgba(29,111,242,0.2);
  color: var(--primary);
  font-size: 13px;
  font-weight: 600;
  padding: 8px 18px;
  border-radius: 999px;
  margin-bottom: 24px;
  box-shadow: 0 2px 8px rgba(29,111,242,0.08);
}
.hero-badge i { font-size: 14px; }
.hero-title {
  font-size: clamp(32px, 5vw, 48px);
  font-weight: 800;
  color: var(--text-title);
  line-height: 1.25;
  margin-bottom: 20px;
  max-width: 700px;
}
.hero-title .grad {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-subtitle {
  font-size: 18px;
  color: var(--text-body);
  line-height: 1.75;
  max-width: 640px;
  margin-bottom: 32px;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 16px; margin-bottom: 40px; }
.hero-trust { display: flex; flex-wrap: wrap; gap: 24px; }
.hero-trust span { display: inline-flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text-muted); }
.hero-trust i { color: var(--success); font-size: 14px; }

/* ===== 数据条 ===== */
.stats-bar {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  padding: 40px 32px;
  margin-top: -60px;
  position: relative;
  z-index: 5;
}
.stats-bar .grid-x { align-items: center; }
.stat-item { text-align: center; padding: 10px 16px; }
.stat-num {
  font-family: var(--font-num);
  font-size: 42px;
  font-weight: 800;
  color: var(--accent);
  line-height: 1.2;
  letter-spacing: 1px;
}
.stat-label { font-size: 14px; color: var(--text-muted); margin-top: 6px; }

/* ===== 功能分组 ===== */
.feature-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 40px 36px;
  box-shadow: var(--shadow-card);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(29,111,242,0.3);
}
.feature-card-wide { grid-column: 1 / -1; background: linear-gradient(135deg, rgba(29,111,242,0.04), rgba(29,111,242,0.08)); }
.feature-card-wide::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 4px; height: 100%;
  background: var(--primary);
  border-radius: 0 4px 4px 0;
}
.feature-icon {
  width: 52px; height: 52px;
  background: rgba(29,111,242,0.08);
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
  color: var(--primary);
  font-size: 22px;
  margin-bottom: 20px;
}
.feature-card h3 { font-size: 20px; font-weight: 700; color: var(--text-title); margin-bottom: 10px; }
.feature-card p { font-size: 15px; color: var(--text-muted); line-height: 1.7; margin-bottom: 16px; }
.feature-link { font-size: 14px; font-weight: 600; color: var(--primary); display: inline-flex; align-items: center; gap: 6px; }
.feature-link:hover { gap: 10px; color: var(--primary-dark); }

/* ===== 场景图文 ===== */
.scene-block { margin-bottom: 60px; }
.scene-block:last-child { margin-bottom: 0; }
.scene-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}
.scene-reverse .scene-inner { direction: rtl; }
.scene-reverse .scene-inner > * { direction: ltr; }
.scene-img {
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  position: relative;
}
.scene-img img { width: 100%; height: 320px; object-fit: cover; transition: transform 0.5s ease; }
.scene-img:hover img { transform: scale(1.04); }
.scene-tag {
  position: absolute;
  top: 16px; left: 16px;
  background: rgba(23,35,61,0.75);
  backdrop-filter: blur(6px);
  color: #fff;
  font-size: 12px;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 999px;
  letter-spacing: 0.5px;
}
.scene-body h3 { font-size: 24px; font-weight: 700; color: var(--text-title); margin-bottom: 16px; line-height: 1.4; }
.scene-body p { font-size: 16px; color: var(--text-muted); line-height: 1.75; margin-bottom: 16px; }
.scene-body .btn { margin-top: 8px; }
.scene-center {
  background: linear-gradient(135deg, rgba(29,111,242,0.06), rgba(29,111,242,0.12));
  border-radius: var(--radius-lg);
  padding: clamp(48px, 8vw, 96px) clamp(24px, 5vw, 64px);
  text-align: center;
}
.scene-center .scene-body { max-width: 600px; margin: 0 auto; }

/* ===== 流程 ===== */
.process-section { background: var(--bg-card); }
.process-steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; margin-top: 40px; position: relative; }
.process-steps::before {
  content: '';
  position: absolute;
  top: 40px; left: 10%; right: 10%;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--accent));
  opacity: 0.15;
  border-radius: 2px;
}
.process-step { text-align: center; padding: 0 16px; position: relative; }
.step-num {
  width: 80px; height: 80px;
  margin: 0 auto 24px;
  background: var(--bg-main);
  border: 2px solid var(--primary);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-family: var(--font-num);
  font-size: 28px;
  font-weight: 800;
  color: var(--primary);
  box-shadow: 0 0 0 6px rgba(29,111,242,0.08);
  position: relative;
  z-index: 1;
}
.process-step h4 { font-size: 18px; font-weight: 700; color: var(--text-title); margin-bottom: 8px; }
.process-step p { font-size: 14px; color: var(--text-muted); line-height: 1.6; }

/* ===== 案例 ===== */
.case-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.case-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: var(--transition);
}
.case-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(29,111,242,0.3);
}
.case-img { position: relative; overflow: hidden; height: 200px; }
.case-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.case-card:hover .case-img img { transform: scale(1.05); }
.case-badge {
  position: absolute;
  top: 14px; right: 14px;
  background: var(--accent);
  color: #fff;
  font-family: var(--font-num);
  font-size: 15px;
  font-weight: 700;
  padding: 4px 14px;
  border-radius: 999px;
  box-shadow: 0 4px 12px rgba(255,122,26,0.35);
  letter-spacing: 0.5px;
}
.case-body { padding: 24px; }
.case-body h4 { font-size: 18px; font-weight: 700; color: var(--text-title); margin-bottom: 10px; }
.case-body p { font-size: 14px; color: var(--text-muted); line-height: 1.65; }

/* ===== FAQ ===== */
.faq-wrap { max-width: 820px; margin: 0 auto; }
.accordion { display: flex; flex-direction: column; gap: 16px; }
.accordion-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 12px;
  overflow: hidden;
  transition: var(--transition);
}
.accordion-item.is-active { border-color: rgba(29,111,242,0.3); box-shadow: var(--shadow-card); }
.accordion-title {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-title);
  cursor: pointer;
  transition: var(--transition);
}
.accordion-title:hover { color: var(--primary); background: rgba(29,111,242,0.02); }
.accordion-title::after {
  content: '+';
  display: flex;
  align-items: center;
  justify-content: center;
  width: 28px; height: 28px;
  border-radius: 50%;
  background: rgba(29,111,242,0.08);
  color: var(--primary);
  font-size: 18px;
  font-weight: 700;
  transition: transform 0.3s ease;
  line-height: 1;
}
.accordion-item.is-active .accordion-title::after { transform: rotate(45deg); background: var(--primary); color: #fff; }
.accordion-content {
  padding: 0 24px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease;
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.7;
}
.accordion-item.is-active .accordion-content { max-height: 300px; padding-bottom: 24px; }

/* ===== CTA ===== */
.cta-banner {
  background: linear-gradient(120deg, rgba(29,111,242,0.08), rgba(29,111,242,0.04));
  border: 1px solid rgba(29,111,242,0.15);
  border-radius: var(--radius-lg);
  padding: clamp(48px, 7vw, 80px) clamp(24px, 5vw, 64px);
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-banner::before {
  content: '';
  position: absolute;
  width: 300px; height: 300px;
  border: 24px solid rgba(29,111,242,0.04);
  border-radius: 50%;
  bottom: -120px; right: -80px;
}
.cta-banner::after {
  content: '';
  position: absolute;
  width: 180px; height: 180px;
  border: 16px solid rgba(255,122,26,0.04);
  border-radius: 50%;
  top: -60px; left: -40px;
}
.cta-banner h2 { font-size: clamp(26px, 3.5vw, 36px); font-weight: 800; color: var(--text-title); margin-bottom: 16px; position: relative; z-index: 1; }
.cta-banner p { color: var(--text-muted); max-width: 520px; margin: 0 auto 28px; position: relative; z-index: 1; }
.cta-banner .btn { position: relative; z-index: 1; }

/* ===== 页脚 ===== */
.site-footer { background: var(--text-title); color: rgba(255,255,255,0.75); padding: 64px 0 0; margin-top: clamp(3.5rem, 8vw, 6.5rem); }
.footer-grid { padding-bottom: 40px; }
.footer-brand .brand-light .brand-text { color: #fff; }
.footer-brand .brand-light .brand-icon { background: rgba(255,255,255,0.15); color: #fff; box-shadow: none; }
.footer-brand p { font-size: 14px; line-height: 1.7; margin-top: 16px; margin-bottom: 20px; color: rgba(255,255,255,0.6); }
.footer-social { display: flex; gap: 10px; }
.footer-social a {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: rgba(255,255,255,0.08);
  color: rgba(255,255,255,0.8);
  display: flex; align-items: center; justify-content: center;
  font-size: 15px;
  transition: var(--transition);
}
.footer-social a:hover { background: var(--primary); color: #fff; transform: translateY(-3px); }
.footer-col h4 { font-size: 16px; font-weight: 700; color: #fff; margin-bottom: 18px; }
.footer-col a { display: block; font-size: 14px; color: rgba(255,255,255,0.6); margin-bottom: 10px; transition: var(--transition); }
.footer-col a:hover { color: #fff; padding-left: 4px; }
.footer-col p { font-size: 14px; color: rgba(255,255,255,0.6); margin-bottom: 10px; display: flex; align-items: center; gap: 8px; }
.footer-col i { color: var(--primary); width: 18px; text-align: center; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding: 20px 0;
  text-align: center;
}
.footer-bottom p { font-size: 13px; color: rgba(255,255,255,0.4); }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .feature-grid { grid-template-columns: 1fr; }
  .feature-card-wide { grid-column: 1; }
  .process-steps { grid-template-columns: repeat(2, 1fr); gap: 32px; }
  .process-steps::before { display: none; }
  .case-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .navbar { flex-wrap: wrap; border-radius: 24px; padding: 12px 16px; gap: 10px; }
  .nav-list {
    display: none;
    width: 100%;
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
    padding: 12px 0 4px;
    border-top: 1px solid var(--border);
    margin-top: 8px;
    background: rgba(246,249,254,0.95);
  }
  .nav-list.open { display: flex; }
  .nav-link { width: 100%; padding: 10px 16px; border-radius: var(--radius-sm); }
  .nav-right { margin-left: auto; }
  .nav-toggle { display: flex; }
  .scene-inner { grid-template-columns: 1fr; gap: 32px; }
  .scene-reverse .scene-inner { direction: ltr; }
  .scene-img img { height: 240px; }
  .case-grid { grid-template-columns: 1fr; }
  .stats-bar { padding: 24px 16px; margin-top: -30px; }
  .stat-item { padding: 12px; }
  .stat-num { font-size: 32px; }
  .hero { padding-top: 120px; }
  .hero-subtitle { font-size: 16px; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .hero-actions .btn { width: 100%; }
  .hero-trust { flex-direction: column; gap: 12px; }
}
@media (max-width: 520px) {
  .process-steps { grid-template-columns: 1fr; }
  .brand-text { font-size: 17px; }
  .nav-cta { display: none; }
  .section { padding: 48px 0; }
  .footer-grid .cell { margin-bottom: 32px; }
}

/* roulang page: category2 */
:root {
            --primary: #1D6FF2;
            --primary-dark: #155BD8;
            --primary-light: rgba(29, 111, 242, 0.10);
            --accent: #FF7A1A;
            --accent-soft: #FF9A3D;
            --success: #10B981;
            --bg: #F6F9FE;
            --card-bg: #FFFFFF;
            --title: #17233D;
            --text: #3D4C66;
            --text-light: #7A879E;
            --border: #E4ECF7;
            --disabled: #C0CDE0;
            --radius-sm: 10px;
            --radius-lg: 16px;
            --radius-pill: 999px;
            --shadow-card: 0 2px 8px rgba(23, 35, 61, 0.06);
            --shadow-hover: 0 12px 32px rgba(29, 111, 242, 0.14);
            --shadow-nav: 0 8px 24px rgba(23, 35, 61, 0.10);
            --transition: all 0.3s ease;
            --container: 1200px;
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
            background: var(--bg);
            color: var(--text);
            line-height: 1.75;
            font-size: 16px;
            -webkit-font-smoothing: antialiased;
        }

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

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

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

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

        .section-padding {
            padding: clamp(3.5rem, 8vw, 6.5rem) 0;
        }

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

        .text-primary {
            color: var(--primary) !important;
        }

        .text-accent {
            color: var(--accent) !important;
        }

        .text-light {
            color: var(--text-light);
        }

        /* === Header Navigation === */
        .site-header {
            position: fixed;
            top: 16px;
            left: 0;
            right: 0;
            z-index: 1000;
            padding: 0 24px;
            pointer-events: none;
        }

        .navbar {
            max-width: var(--container);
            margin: 0 auto;
            display: flex;
            align-items: center;
            justify-content: space-between;
            background: rgba(246, 249, 254, 0.85);
            -webkit-backdrop-filter: blur(12px);
            backdrop-filter: blur(12px);
            border: 1px solid rgba(255, 255, 255, 0.6);
            border-radius: var(--radius-pill);
            padding: 12px 28px;
            box-shadow: var(--shadow-nav);
            pointer-events: auto;
            transition: var(--transition);
        }

        .site-header.scrolled .navbar {
            background: rgba(246, 249, 254, 0.95);
            padding: 8px 28px;
        }

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

        .brand-icon {
            width: 38px;
            height: 38px;
            border-radius: 12px;
            background: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 16px;
            box-shadow: 0 4px 12px rgba(29, 111, 242, 0.3);
        }

        .brand-text {
            font-size: 20px;
            font-weight: 800;
            color: var(--title);
            letter-spacing: 0.5px;
        }

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

        .nav-list {
            list-style: none;
            display: flex;
            align-items: center;
            gap: 4px;
            margin: 0;
            flex-wrap: wrap;
            justify-content: center;
        }

        .nav-list li {
            margin: 0;
        }

        .nav-link {
            display: inline-block;
            padding: 8px 18px;
            border-radius: var(--radius-pill);
            color: var(--text);
            font-size: 14px;
            font-weight: 500;
            transition: var(--transition);
            border: 1px solid transparent;
        }

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

        .nav-link.active {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            font-weight: 600;
            box-shadow: 0 4px 12px rgba(29, 111, 242, 0.25);
        }

        .nav-right {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            padding: 12px 24px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 600;
            border: 1px solid transparent;
            cursor: pointer;
            transition: var(--transition);
            line-height: 1.5;
            text-align: center;
        }

        .btn-primary {
            background: var(--primary);
            color: #fff;
            border-color: var(--primary);
            box-shadow: 0 4px 12px rgba(29, 111, 242, 0.22);
        }

        .btn-primary:hover {
            background: var(--primary-dark);
            color: #fff;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(29, 111, 242, 0.3);
        }

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

        .btn-secondary:hover {
            background: var(--primary-light);
            color: var(--primary);
            transform: translateY(-2px);
        }

        .btn-accent {
            background: linear-gradient(135deg, var(--accent), var(--accent-soft));
            color: #fff;
            border-color: var(--accent);
            box-shadow: 0 4px 16px rgba(255, 122, 26, 0.3);
        }

        .btn-accent:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(255, 122, 26, 0.4);
            color: #fff;
        }

        .btn-sm {
            padding: 8px 18px;
            font-size: 14px;
            border-radius: var(--radius-pill);
        }

        .btn:active {
            transform: translateY(1px);
        }

        .btn:focus-visible {
            outline: 4px solid rgba(29, 111, 242, 0.12);
            outline-offset: 2px;
        }

        .nav-cta {
            white-space: nowrap;
        }

        .nav-toggle {
            display: none;
            flex-direction: column;
            gap: 5px;
            width: 42px;
            height: 42px;
            background: transparent;
            border: none;
            border-radius: var(--radius-sm);
            cursor: pointer;
            align-items: center;
            justify-content: center;
            background: var(--primary-light);
        }

        .nav-toggle span {
            width: 20px;
            height: 2px;
            background: var(--primary);
            border-radius: 2px;
            transition: var(--transition);
        }

        /* Mobile Drawer */
        .mobile-drawer {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            background: rgba(246, 249, 254, 0.98);
            z-index: 999;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 12px;
            opacity: 0;
            visibility: hidden;
            transition: var(--transition);
        }

        .mobile-drawer.open {
            opacity: 1;
            visibility: visible;
        }

        .mobile-drawer .nav-link {
            font-size: 20px;
            padding: 12px 32px;
        }

        .mobile-drawer .btn {
            margin-top: 16px;
            font-size: 18px;
            padding: 14px 40px;
        }

        /* === Page Banner === */
        .page-banner {
            position: relative;
            padding: 160px 0 80px;
            background: url('/assets/images/backpic/back-2.webp') center/cover no-repeat;
            overflow: hidden;
        }

        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(135deg, rgba(246, 249, 254, 0.95) 30%, rgba(246, 249, 254, 0.6) 70%);
        }

        .page-banner::after {
            content: '';
            position: absolute;
            top: -60%;
            right: -20%;
            width: 600px;
            height: 600px;
            border-radius: 50%;
            border: 3px solid rgba(29, 111, 242, 0.06);
        }

        .page-banner .container {
            position: relative;
            z-index: 2;
        }

        .breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            color: var(--text-light);
            margin-bottom: 24px;
            flex-wrap: wrap;
        }

        .breadcrumb a {
            color: var(--text-light);
        }

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

        .breadcrumb .separator {
            color: var(--disabled);
        }

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

        .page-banner h1 {
            font-size: clamp(32px, 5vw, 48px);
            font-weight: 800;
            line-height: 1.25;
            color: var(--title);
            margin-bottom: 20px;
            max-width: 640px;
        }

        .page-banner .banner-desc {
            font-size: 18px;
            color: var(--text);
            line-height: 1.75;
            max-width: 600px;
            margin-bottom: 32px;
        }

        .banner-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
            margin-top: 24px;
        }

        .banner-tag {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 8px 16px;
            background: rgba(255, 255, 255, 0.8);
            border: 1px solid var(--border);
            border-radius: var(--radius-pill);
            font-size: 13px;
            color: var(--text);
            font-weight: 500;
            -webkit-backdrop-filter: blur(8px);
            backdrop-filter: blur(8px);
        }

        .banner-tag i {
            color: var(--accent);
        }

        /* === Stats Section === */
        .stats-section {
            background: var(--card-bg);
            border-bottom: 1px solid var(--border);
            padding: 48px 0;
        }

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

        .stat-item {
            text-align: center;
            padding: 24px 16px;
            border-radius: var(--radius-lg);
            background: var(--bg);
            border: 1px solid var(--border);
            transition: var(--transition);
        }

        .stat-item:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            border-color: rgba(29, 111, 242, 0.3);
        }

        .stat-number {
            font-family: "DIN Alternate", "Bahnschrift", monospace;
            font-size: 42px;
            font-weight: 700;
            color: var(--accent);
            line-height: 1.2;
            margin-bottom: 4px;
        }

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

        /* === Section Head === */
        .section-head {
            text-align: center;
            max-width: 720px;
            margin: 0 auto 56px;
        }

        .section-head h2 {
            font-size: clamp(26px, 3.5vw, 36px);
            font-weight: 700;
            color: var(--title);
            line-height: 1.3;
            margin-bottom: 16px;
        }

        .section-head p {
            font-size: 16px;
            color: var(--text-light);
            line-height: 1.75;
        }

        /* === Feature Group (错位布局) === */
        .feature-section {
            padding: clamp(3.5rem, 8vw, 6.5rem) 0;
        }

        .feature-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 24px;
            margin-bottom: 24px;
        }

        .feature-card-large {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 40px;
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            position: relative;
            overflow: hidden;
        }

        .feature-card-large::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--primary-light));
        }

        .feature-card-large:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            border-color: rgba(29, 111, 242, 0.3);
        }

        .feature-card-small {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 32px;
            box-shadow: var(--shadow-card);
            transition: var(--transition);
            display: flex;
            align-items: flex-start;
            gap: 20px;
        }

        .feature-card-small:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            border-color: rgba(29, 111, 242, 0.3);
        }

        .feature-stack {
            display: grid;
            grid-template-rows: 1fr 1fr;
            gap: 24px;
        }

        .feature-icon {
            width: 48px;
            height: 48px;
            border-radius: 12px;
            background: var(--primary-light);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            color: var(--primary);
            margin-bottom: 20px;
            flex-shrink: 0;
        }

        .feature-card-large h3 {
            font-size: 22px;
            font-weight: 600;
            margin-bottom: 12px;
            color: var(--title);
        }

        .feature-card-large p {
            color: var(--text-light);
            font-size: 15px;
            line-height: 1.75;
            margin-bottom: 20px;
        }

        .feature-card-small .feature-icon {
            margin-bottom: 0;
            width: 44px;
            height: 44px;
            font-size: 18px;
        }

        .feature-card-small h4 {
            font-size: 17px;
            font-weight: 600;
            color: var(--title);
            margin-bottom: 8px;
        }

        .feature-card-small p {
            font-size: 14px;
            color: var(--text-light);
            line-height: 1.6;
        }

        .feature-link {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: 14px;
            font-weight: 600;
            color: var(--primary);
            margin-top: 8px;
        }

        .feature-link:hover {
            color: var(--primary-dark);
            gap: 12px;
        }

        /* 三小卡 */
        .mini-card-row {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
            margin-top: 24px;
        }

        .mini-card {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 24px;
            text-align: center;
            transition: var(--transition);
        }

        .mini-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            border-color: rgba(29, 111, 242, 0.3);
            background: #fff;
        }

        .mini-card i {
            font-size: 28px;
            color: var(--primary);
            margin-bottom: 12px;
        }

        .mini-card h4 {
            font-size: 16px;
            font-weight: 600;
            color: var(--title);
            margin-bottom: 8px;
        }

        .mini-card p {
            font-size: 13px;
            color: var(--text-light);
            line-height: 1.6;
        }

        /* === Service Cards === */
        .service-section {
            background: var(--card-bg);
        }

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

        .service-card {
            background: var(--bg);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            overflow: hidden;
            transition: var(--transition);
        }

        .service-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-6px);
            border-color: rgba(29, 111, 242, 0.3);
        }

        .service-img {
            position: relative;
            overflow: hidden;
            aspect-ratio: 16/10;
        }

        .service-img img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

        .service-card:hover .service-img img {
            transform: scale(1.05);
        }

        .service-card-body {
            padding: 24px;
        }

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

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

        .service-tag {
            display: inline-block;
            padding: 4px 12px;
            background: var(--primary-light);
            color: var(--primary);
            border-radius: var(--radius-pill);
            font-size: 12px;
            font-weight: 600;
        }

        /* === Flow Section === */
        .flow-section {
            background: var(--bg);
        }

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

        .flow-wrapper::before {
            content: '';
            position: absolute;
            top: 40px;
            left: 10%;
            right: 10%;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--primary-light), var(--primary));
            z-index: 0;
        }

        .flow-step {
            position: relative;
            z-index: 1;
            text-align: center;
            padding: 0 16px;
        }

        .flow-step-num {
            width: 80px;
            height: 80px;
            margin: 0 auto 24px;
            border-radius: 50%;
            background: var(--card-bg);
            border: 3px solid var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 24px;
            font-weight: 800;
            color: var(--primary);
            font-family: "DIN Alternate", "Bahnschrift", monospace;
            box-shadow: 0 4px 16px rgba(29, 111, 242, 0.15);
            background: #fff;
        }

        .flow-step h3 {
            font-size: 18px;
            font-weight: 600;
            color: var(--title);
            margin-bottom: 10px;
        }

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

        /* === Scene Section === */
        .scene-section {
            background: var(--card-bg);
        }

        .scene-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 60px;
            align-items: center;
            margin-bottom: 80px;
        }

        .scene-block:last-child {
            margin-bottom: 0;
        }

        .scene-block.reverse .scene-img {
            order: 2;
        }

        .scene-block.reverse .scene-content {
            order: 1;
        }

        .scene-img {
            border-radius: var(--radius-lg);
            overflow: hidden;
            box-shadow: var(--shadow-card);
        }

        .scene-img img {
            width: 100%;
            height: 100%;
            aspect-ratio: 4/3;
            object-fit: cover;
            transition: transform 0.5s ease;
        }

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

        .scene-content h3 {
            font-size: clamp(24px, 3vw, 30px);
            font-weight: 700;
            color: var(--title);
            margin-bottom: 16px;
            line-height: 1.3;
        }

        .scene-content p {
            font-size: 15px;
            color: var(--text-light);
            line-height: 1.75;
            margin-bottom: 16px;
        }

        .scene-list {
            list-style: none;
            margin: 20px 0;
        }

        .scene-list li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            margin-bottom: 10px;
            font-size: 14px;
            color: var(--text);
        }

        .scene-list li i {
            color: var(--success);
            margin-top: 5px;
            font-size: 14px;
            flex-shrink: 0;
        }

        /* === Dark CTA Banner === */
        .cta-banner {
            position: relative;
            padding: 80px 0;
            background: var(--title) url('/assets/images/backpic/back-3.webp') center/cover no-repeat;
            color: #fff;
            text-align: center;
        }

        .cta-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: rgba(23, 35, 61, 0.88);
        }

        .cta-banner .container {
            position: relative;
            z-index: 1;
        }

        .cta-banner h2 {
            font-size: clamp(28px, 4vw, 40px);
            font-weight: 800;
            margin-bottom: 16px;
        }

        .cta-banner p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.8);
            max-width: 640px;
            margin: 0 auto 32px;
        }

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

        .faq-container {
            max-width: 820px;
            margin: 0 auto;
        }

        .faq-item {
            background: var(--card-bg);
            border: 1px solid var(--border);
            border-radius: 12px;
            margin-bottom: 16px;
            padding: 0;
            overflow: hidden;
            transition: var(--transition);
        }

        .faq-item.active {
            border-color: rgba(29, 111, 242, 0.3);
            box-shadow: 0 4px 12px rgba(29, 111, 242, 0.08);
        }

        .faq-question {
            width: 100%;
            padding: 24px 28px;
            background: transparent;
            border: none;
            font-size: 16px;
            font-weight: 600;
            color: var(--title);
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            text-align: left;
            gap: 16px;
            font-family: inherit;
            transition: var(--transition);
        }

        .faq-question:hover {
            background: rgba(29, 111, 242, 0.03);
        }

        .faq-question .faq-icon {
            width: 28px;
            height: 28px;
            border-radius: 50%;
            background: var(--primary-light);
            color: var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            flex-shrink: 0;
            transition: transform 0.3s ease;
        }

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

        .faq-answer {
            padding: 0 28px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            color: var(--text);
            font-size: 14px;
            line-height: 1.75;
        }

        .faq-item.active .faq-answer {
            padding: 0 28px 24px;
            max-height: 300px;
        }

        /* === Footer === */
        .site-footer {
            background: var(--title);
            color: rgba(255, 255, 255, 0.8);
            padding: 64px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 3fr 2fr 2.5fr 2.5fr;
            gap: 40px;
            padding-bottom: 48px;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.75;
            color: rgba(255, 255, 255, 0.6);
            margin-top: 16px;
            margin-bottom: 20px;
        }

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

        .footer-social a {
            width: 40px;
            height: 40px;
            border-radius: 50%;
            background: rgba(255, 255, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: rgba(255, 255, 255, 0.8);
            font-size: 16px;
            transition: var(--transition);
        }

        .footer-social a:hover {
            background: var(--primary);
            color: #fff;
            transform: translateY(-3px);
        }

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

        .footer-col a {
            display: block;
            color: rgba(255, 255, 255, 0.6);
            font-size: 14px;
            padding: 6px 0;
            transition: var(--transition);
        }

        .footer-col a:hover {
            color: #fff;
            padding-left: 4px;
        }

        .footer-col p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.6);
            margin-bottom: 12px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .footer-col p i {
            color: var(--accent);
            width: 20px;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding: 20px 0;
            text-align: center;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.4);
        }

        .footer-bottom a {
            color: rgba(255, 255, 255, 0.5);
        }

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

        /* === Responsive === */
        @media screen and (max-width: 1024px) {
            .service-grid {
                grid-template-columns: repeat(2, 1fr);
            }

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

            .scene-block {
                gap: 40px;
            }
        }

        @media screen and (max-width: 768px) {
            .navbar {
                padding: 10px 20px;
            }

            .nav-list {
                display: none;
            }

            .nav-toggle {
                display: flex;
            }

            .nav-cta {
                display: none;
            }

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

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

            .feature-stack {
                grid-template-columns: 1fr;
                grid-template-rows: none;
            }

            .mini-card-row {
                grid-template-columns: 1fr;
            }

            .flow-wrapper {
                grid-template-columns: 1fr 1fr;
            }

            .flow-wrapper::before {
                display: none;
            }

            .flow-step {
                margin-bottom: 32px;
            }

            .scene-block {
                grid-template-columns: 1fr;
                gap: 32px;
                margin-bottom: 48px;
            }

            .scene-block.reverse .scene-img {
                order: 0;
            }

            .scene-block.reverse .scene-content {
                order: 0;
            }

            .page-banner {
                padding: 140px 0 60px;
            }

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

        @media screen and (max-width: 520px) {
            .container {
                padding: 0 16px;
            }

            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }

            .stat-number {
                font-size: 32px;
            }

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

            .flow-wrapper {
                grid-template-columns: 1fr;
            }

            .feature-card-large {
                padding: 24px;
            }

            .feature-card-small {
                padding: 20px;
                flex-direction: column;
                gap: 12px;
            }

            .page-banner h1 {
                font-size: 30px;
            }

            .page-banner .banner-desc {
                font-size: 16px;
            }

            .faq-question {
                padding: 20px;
                font-size: 15px;
            }

            .faq-answer {
                padding: 0 20px;
            }

            .faq-item.active .faq-answer {
                padding: 0 20px 20px;
            }

            .site-header {
                padding: 0 12px;
                top: 10px;
            }
        }

/* roulang page: article */
:root {
  --bg: #F6F9FE;
  --card-bg: #FFFFFF;
  --primary: #1D6FF2;
  --primary-dark: #155BD8;
  --primary-light: rgba(29,111,242,.10);
  --accent: #FF7A1A;
  --accent-light: rgba(255,122,26,.12);
  --success: #10B981;
  --title-color: #17233D;
  --text-color: #3D4C66;
  --text-muted: #7A879E;
  --border: #E4ECF7;
  --disabled: #C0CDE0;
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-pill: 999px;
  --shadow-card: 0 2px 8px rgba(23,35,61,.06);
  --shadow-hover: 0 12px 32px rgba(29,111,242,.14);
  --shadow-nav: 0 8px 24px rgba(23,35,61,.10);
  --font-main: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
  --font-num: "DIN Alternate", "Bahnschrift", monospace;
}
*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-main);
  background: var(--bg);
  color: var(--text-color);
  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 .25s ease; }
a:hover { color: var(--primary-dark); }
h1, h2, h3, h4, h5, h6 { color: var(--title-color); font-weight: 700; line-height: 1.3; }
ul, ol { list-style: none; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  line-height: 1.4;
  text-align: center;
  transition: all .25s ease;
}
.btn-primary { background: var(--primary); color: #fff !important; }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 20px rgba(29,111,242,.3); }
.btn-primary:active { transform: translateY(0); }
.btn-primary:focus-visible { outline: 4px solid rgba(29,111,242,.12); outline-offset: 2px; }
.btn-outline { background: #fff; color: var(--primary); border-color: var(--primary); }
.btn-outline:hover { background: rgba(29,111,242,.06); color: var(--primary-dark); transform: translateY(-1px); }
.btn-accent {
  background: linear-gradient(135deg, #FF7A1A, #FF9A3D);
  color: #fff !important;
  box-shadow: 0 4px 16px rgba(255,122,26,.25);
}
.btn-accent:hover { transform: translateY(-2px); box-shadow: 0 10px 24px rgba(255,122,26,.35); }
.btn-sm { padding: 8px 18px; font-size: 14px; }
.btn-lg { padding: 14px 36px; font-size: 16px; }
.btn:active { transform: translateY(0); }

.tag {
  display: inline-block;
  padding: 4px 14px;
  font-size: 12px;
  font-weight: 600;
  border-radius: var(--radius-pill);
  background: rgba(29,111,242,.08);
  color: var(--primary);
  transition: all .25s ease;
}
.tag:hover { background: var(--primary); color: #fff; }
.tag-accent { background: var(--accent-light); color: var(--accent); }
.tag-accent:hover { background: var(--accent); color: #fff; }

.site-header {
  position: fixed;
  top: 16px;
  left: 0;
  right: 0;
  z-index: 1000;
  pointer-events: none;
}
.navbar {
  pointer-events: auto;
  max-width: 1200px;
  margin: 0 auto;
  padding: 10px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  background: rgba(246,249,254,.85);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
  border-radius: var(--radius-pill);
  border: 1px solid rgba(255,255,255,.6);
  box-shadow: var(--shadow-nav);
  transition: padding .3s ease, background .3s ease;
}
.navbar.scrolled { background: rgba(246,249,254,.95); padding: 8px 24px; }
.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  font-size: 20px;
  color: var(--title-color);
  white-space: nowrap;
  line-height: 1;
}
.brand-icon {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--primary);
  color: #fff;
  border-radius: 10px;
  font-size: 16px;
  flex-shrink: 0;
}
.brand-icon i { transform: rotate(-12deg); }
.nav-list {
  display: flex;
  align-items: center;
  gap: 6px;
  margin: 0;
}
.nav-list li { margin: 0; }
.nav-link {
  display: block;
  padding: 8px 18px;
  border-radius: var(--radius-pill);
  font-size: 14px;
  font-weight: 600;
  color: var(--text-color);
  transition: all .25s ease;
}
.nav-link:hover { background: rgba(29,111,242,.08); color: var(--primary); }
.nav-link.active { background: var(--primary); color: #fff; box-shadow: 0 4px 12px rgba(29,111,242,.3); }
.nav-right { display: flex; align-items: center; gap: 12px; }
.nav-cta { white-space: nowrap; }
.nav-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  z-index: 1300;
}
.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--title-color);
  margin: 4px 0;
  border-radius: 2px;
  transition: all .3s ease;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(6px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-6px) rotate(-45deg); }
.nav-mobile-cta { display: none; margin-top: 16px; }

.page-banner {
  padding: 160px 0 56px;
  background:
    linear-gradient(rgba(246,249,254,.88), rgba(246,249,254,.94)),
    url('/assets/images/backpic/back-1.png') center / cover no-repeat;
  border-bottom: 1px solid var(--border);
}
.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 20px;
}
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { font-size: 10px; color: var(--disabled); }
.breadcrumb .current { color: var(--title-color); font-weight: 600; max-width: 480px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.page-title {
  font-size: clamp(32px, 5vw, 44px);
  font-weight: 800;
  color: var(--title-color);
  line-height: 1.25;
  margin-bottom: 12px;
  max-width: 860px;
}
.page-intro { color: var(--text-muted); font-size: 16px; }

.article-main { padding: 48px 0 72px; }
.article-layout { display: flex; gap: 40px; align-items: flex-start; }
.article-primary { flex: 1; min-width: 0; }
.article-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 40px;
  box-shadow: var(--shadow-card);
}
.article-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 20px;
  padding-bottom: 24px;
  margin-bottom: 32px;
  border-bottom: 1px solid var(--border);
  font-size: 14px;
  color: var(--text-muted);
}
.meta-item { display: inline-flex; align-items: center; gap: 6px; }
.meta-item i { color: var(--primary); font-size: 13px; }
.article-content { font-size: 16px; line-height: 1.9; color: var(--text-color); }
.article-content p { margin-bottom: 24px; }
.article-content h2 { font-size: 24px; font-weight: 700; margin: 36px 0 16px; padding-bottom: 10px; border-bottom: 1px solid var(--border); }
.article-content h3 { font-size: 20px; font-weight: 600; margin: 28px 0 12px; }
.article-content h4 { font-size: 18px; font-weight: 600; margin: 24px 0 8px; }
.article-content img { border-radius: var(--radius-md); border: 1px solid var(--border); margin: 24px 0; }
.article-content blockquote {
  border-left: 4px solid var(--primary);
  background: rgba(29,111,242,.04);
  margin: 24px 0;
  padding: 16px 24px;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--title-color);
}
.article-content ul, .article-content ol { margin: 0 0 24px; padding-left: 24px; }
.article-content ul li { list-style: disc; margin-bottom: 8px; }
.article-content ol li { list-style: decimal; margin-bottom: 8px; }
.article-content ul li::marker { color: var(--primary); }
.article-content ol li::marker { color: var(--primary); font-weight: 600; }
.article-content a { color: var(--primary); text-decoration: underline; text-underline-offset: 2px; }
.article-content a:hover { color: var(--primary-dark); }
.article-content table { width: 100%; border-collapse: collapse; margin: 24px 0; }
.article-content th, .article-content td { border: 1px solid var(--border); padding: 10px 14px; text-align: left; }
.article-content th { background: var(--bg); font-weight: 600; color: var(--title-color); }
.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding-top: 24px;
  margin-top: 36px;
  border-top: 1px solid var(--border);
}
.article-pager {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}
.pager-link {
  display: block;
  flex: 1;
  max-width: 48%;
  padding: 16px 20px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  transition: all .25s ease;
}
.pager-link:hover { border-color: var(--primary); background: rgba(29,111,242,.06); }
.pager-link.pager-next { text-align: right; }
.pager-label { display: block; font-size: 12px; color: var(--text-muted); margin-bottom: 4px; }
.pager-title { font-weight: 600; color: var(--title-color); font-size: 14px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.pager-link:hover .pager-title { color: var(--primary); }
.article-back { margin-top: 24px; text-align: center; }
.article-notfound { text-align: center; padding: 48px 24px; }
.notfound-icon {
  width: 72px;
  height: 72px;
  margin: 0 auto 24px;
  border-radius: 50%;
  background: var(--accent-light);
  color: var(--accent);
  font-size: 30px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.notfound-title { font-size: 24px; font-weight: 700; margin-bottom: 12px; color: var(--title-color); }
.notfound-desc { color: var(--text-muted); font-size: 15px; margin-bottom: 28px; line-height: 1.8; }

.article-sidebar { width: 320px; flex-shrink: 0; }
.sidebar-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 28px;
  margin-bottom: 24px;
  box-shadow: var(--shadow-card);
}
.sidebar-card h3 {
  font-size: 17px;
  font-weight: 700;
  color: var(--title-color);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 2px solid var(--bg);
  display: flex;
  align-items: center;
  gap: 8px;
}
.sidebar-card h3 i { color: var(--primary); font-size: 15px; }
.sidebar-list li { margin-bottom: 12px; }
.sidebar-list li:last-child { margin-bottom: 0; }
.sidebar-list a {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  color: var(--text-color);
  font-size: 14px;
  padding: 6px 0;
  transition: color .2s ease;
}
.sidebar-list a:hover { color: var(--primary); }
.sidebar-list .count {
  font-family: var(--font-num);
  font-size: 13px;
  color: var(--disabled);
  background: var(--bg);
  padding: 2px 8px;
  border-radius: var(--radius-pill);
  white-space: nowrap;
}
.sidebar-hot a { font-size: 13px; line-height: 1.5; }
.sidebar-hot a span:first-child {
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.related-section { padding: 72px 0; background: #fff; border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section-head { margin-bottom: 40px; }
.section-tag {
  display: inline-block;
  padding: 4px 16px;
  background: rgba(29,111,242,.08);
  color: var(--primary);
  border-radius: var(--radius-pill);
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 12px;
}
.section-title { font-size: clamp(26px, 3.5vw, 36px); font-weight: 700; color: var(--title-color); margin-bottom: 8px; }
.section-desc { color: var(--text-muted); font-size: 16px; max-width: 560px; }
.related-card-wrap { margin-bottom: 24px; }
.related-card {
  background: #fff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  height: 100%;
  display: flex;
  flex-direction: column;
  transition: all .3s ease;
}
.related-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); border-color: rgba(29,111,242,.3); }
.card-img { display: block; overflow: hidden; aspect-ratio: 16/9; }
.card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s ease; }
.related-card:hover .card-img img { transform: scale(1.05); }
.card-body { padding: 24px; display: flex; flex-direction: column; flex: 1; }
.card-body .tag { align-self: flex-start; margin-bottom: 12px; }
.card-title { font-size: 18px; font-weight: 600; line-height: 1.4; margin-bottom: 8px; }
.card-title a { color: var(--title-color); transition: color .2s ease; }
.card-title a:hover { color: var(--primary); }
.card-desc {
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.6;
  margin-bottom: 16px;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}
.card-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: auto;
  padding-top: 14px;
  border-top: 1px solid var(--bg);
  font-size: 13px;
  color: var(--text-muted);
}
.card-date i { margin-right: 4px; }
.card-link { font-weight: 600; color: var(--primary); font-size: 13px; display: inline-flex; align-items: center; gap: 4px; }
.card-link:hover { gap: 8px; transition: gap .2s ease; }

.cta-banner {
  padding: 80px 0;
  background:
    linear-gradient(rgba(23,35,61,.80), rgba(23,35,61,.88)),
    url('/assets/images/backpic/back-3.webp') center / cover no-repeat;
  text-align: center;
}
.cta-banner h2 { color: #fff; font-size: clamp(26px, 3.5vw, 36px); font-weight: 800; margin-bottom: 12px; }
.cta-banner p { color: #C6D3E8; font-size: 16px; margin-bottom: 32px; }

.site-footer { background: var(--title-color); color: #B9C6DC; padding: 64px 0 0; }
.footer-grid { margin-bottom: 40px; }
.footer-brand .brand { color: #fff; font-size: 22px; }
.footer-brand p { color: #8A97AD; font-size: 14px; margin: 16px 0 20px; max-width: 300px; }
.footer-social { display: flex; gap: 10px; }
.footer-social a {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: rgba(255,255,255,.06);
  color: #B9C6DC;
  font-size: 14px;
  transition: all .25s ease;
}
.footer-social a:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }
.footer-col h4 { color: #fff; font-size: 16px; font-weight: 700; margin-bottom: 18px; }
.footer-col a { display: block; color: #8A97AD; font-size: 14px; padding: 5px 0; transition: color .2s ease; }
.footer-col a:hover { color: #fff; }
.footer-col p { color: #8A97AD; font-size: 14px; margin-bottom: 8px; }
.footer-col p i { margin-right: 8px; color: var(--primary); width: 16px; text-align: center; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.08); padding: 24px 0; text-align: center; font-size: 13px; color: #6B7990; }

@media (max-width: 1023px) {
  .article-layout { flex-direction: column; }
  .article-sidebar { width: 100%; display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
  .article-sidebar .sidebar-card { margin-bottom: 0; }
}
@media (max-width: 767px) {
  .article-sidebar { grid-template-columns: 1fr; }
  .article-card { padding: 24px; }
  .article-pager { flex-direction: column; }
  .pager-link { max-width: 100%; }
  .pager-link.pager-next { text-align: left; }
}
@media (max-width: 639px) {
  .site-header { top: 8px; }
  .navbar { padding: 10px 16px; border-radius: 16px; }
  .nav-list {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(246,249,254,.98);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 18px;
    margin: 0;
    padding: 0;
    z-index: 1100;
    display: none;
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
  }
  .nav-list.nav-open { display: flex; }
  .nav-list .nav-link { font-size: 18px; padding: 12px 28px; }
  .nav-mobile-cta { display: block; }
  .nav-cta { display: none; }
  .nav-toggle { display: block; }
  .brand-text { font-size: 18px; }
  .page-banner { padding: 130px 0 40px; }
  .page-title { font-size: 30px; }
  .article-main { padding: 32px 0 48px; }
  .article-card { padding: 20px; }
  .related-section { padding: 48px 0; }
  .cta-banner { padding: 56px 0; }
  .footer-grid { margin-bottom: 24px; }
}

/* roulang page: category3 */
:root {
      --primary: #1D6FF2;
      --primary-dark: #155BD8;
      --accent: #FF7A1A;
      --accent-soft: #FFF3E9;
      --success: #10B981;
      --bg: #F6F9FE;
      --card: #FFFFFF;
      --title: #17233D;
      --text: #3D4C66;
      --muted: #7A879E;
      --border: #E4ECF7;
      --radius-sm: 10px;
      --radius-md: 16px;
      --radius-lg: 24px;
      --shadow-sm: 0 2px 8px rgba(23,35,61,0.06);
      --shadow-md: 0 8px 24px rgba(23,35,61,0.10);
      --shadow-lg: 0 12px 32px rgba(29,111,242,0.14);
      --section-pad: clamp(3.5rem, 8vw, 6.5rem);
    }

    * { box-sizing: border-box; }
    html { scroll-behavior: smooth; }

    body {
      margin: 0;
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
      background: var(--bg);
      color: var(--text);
      line-height: 1.75;
      -webkit-font-smoothing: antialiased;
    }

    img { max-width: 100%; display: block; }
    a { color: var(--primary); text-decoration: none; transition: color 0.2s; }
    ul, ol { margin: 0; padding: 0; list-style: none; }

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

    /* ===== Buttons ===== */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      font-weight: 600;
      border-radius: var(--radius-sm);
      padding: 12px 24px;
      border: 1px solid transparent;
      cursor: pointer;
      transition: all 0.25s ease;
      line-height: 1.2;
    }
    .btn-lg { padding: 16px 32px; font-size: 17px; }
    .btn-sm { padding: 8px 16px; font-size: 14px; }
    .btn-primary { background: var(--primary); color: #fff; }
    .btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(29,111,242,0.3); }
    .btn-primary:active { transform: translateY(0); }
    .btn-primary:focus-visible { outline: 4px solid rgba(29,111,242,0.12); outline-offset: 2px; }
    .btn-accent { background: linear-gradient(135deg, #FF7A1A, #FF9A3D); color: #fff; }
    .btn-accent:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(255,122,26,0.35); }
    .btn-accent:active { transform: translateY(0); }
    .btn-outline { background: #fff; border-color: var(--primary); color: var(--primary); }
    .btn-outline:hover { background: rgba(29,111,242,0.06); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(29,111,242,0.12); }

    /* ===== Navigation ===== */
    .site-header {
      position: sticky;
      top: 16px;
      z-index: 100;
      padding: 0 16px;
      pointer-events: none;
    }
    .navbar {
      pointer-events: auto;
      max-width: 1200px;
      margin: 0 auto;
      display: flex;
      align-items: center;
      justify-content: space-between;
      background: rgba(246, 249, 254, 0.85);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-radius: 999px;
      border: 1px solid rgba(255, 255, 255, 0.6);
      box-shadow: var(--shadow-md);
      padding: 10px 24px;
      transition: padding 0.3s, background 0.3s;
    }
    .site-header.scrolled .navbar {
      padding: 6px 24px;
      background: rgba(246, 249, 254, 0.95);
    }
    .brand {
      display: flex;
      align-items: center;
      gap: 8px;
      font-weight: 700;
      color: var(--title);
      white-space: nowrap;
    }
    .brand-icon {
      width: 32px;
      height: 32px;
      border-radius: 50%;
      background: linear-gradient(135deg, var(--primary), #4A9BFF);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 15px;
      flex: 0 0 auto;
    }
    .brand-text { font-size: 18px; letter-spacing: 0.5px; }
    .nav-list {
      display: flex;
      gap: 6px;
      align-items: center;
      margin: 0;
      padding: 0;
      list-style: none;
    }
    .nav-link {
      padding: 8px 16px;
      border-radius: 999px;
      color: var(--title);
      font-weight: 500;
      font-size: 15px;
      display: inline-block;
      transition: background 0.2s, color 0.2s;
    }
    .nav-link:hover { background: rgba(29,111,242,0.08); color: var(--primary); }
    .nav-link.active { background: var(--primary); color: #fff; }
    .nav-right { display: flex; align-items: center; gap: 12px; }
    .nav-cta { white-space: nowrap; }

    .nav-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      width: 40px;
      height: 40px;
      border-radius: 10px;
      flex-direction: column;
      justify-content: center;
      gap: 5px;
      padding: 8px;
    }
    .nav-toggle span {
      display: block;
      height: 2px;
      width: 100%;
      background: var(--title);
      border-radius: 2px;
      transition: transform 0.3s, opacity 0.3s;
    }
    .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); }

    /* ===== Page Hero ===== */
    .page-hero {
      position: relative;
      padding: clamp(6rem, 12vw, 9rem) 0 4.5rem;
      background-size: cover;
      background-position: center;
      background-repeat: no-repeat;
    }
    .hero-overlay {
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, rgba(246,249,254,0.62) 0%, rgba(246,249,254,0.88) 70%, var(--bg) 100%);
    }
    .hero-content { position: relative; z-index: 2; max-width: 760px; }

    .breadcrumb {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 14px;
      color: var(--muted);
      margin-bottom: 20px;
    }
    .breadcrumb a { color: var(--muted); }
    .breadcrumb a:hover { color: var(--primary); }
    .breadcrumb span { color: var(--border); }

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: rgba(29,111,242,0.08);
      color: var(--primary);
      font-size: 13px;
      font-weight: 600;
      padding: 6px 14px;
      border-radius: 999px;
      margin-bottom: 20px;
    }
    .page-hero h1 {
      font-size: clamp(32px, 5vw, 48px);
      font-weight: 800;
      line-height: 1.25;
      color: var(--title);
      margin: 0 0 20px;
    }
    .hero-sub {
      font-size: 17px;
      color: var(--text);
      margin: 0 0 32px;
      max-width: 640px;
    }
    .hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 32px; }
    .hero-points { display: flex; flex-wrap: wrap; gap: 20px; color: var(--muted); font-size: 13px; }
    .hero-points i { color: var(--success); margin-right: 4px; }

    /* ===== Section ===== */
    .section { padding: var(--section-pad) 0; }
    .section-alt { background: #fff; }
    .section-head { text-align: center; max-width: 720px; margin: 0 auto 48px; }
    .section-head h2 {
      font-size: clamp(26px, 3.5vw, 36px);
      font-weight: 700;
      line-height: 1.3;
      color: var(--title);
      margin: 0 0 16px;
    }
    .section-head p { font-size: 16px; color: var(--muted); margin: 0; }

    /* ===== Feature cards ===== */
    .feature-card {
      background: var(--card);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 32px;
      box-shadow: var(--shadow-sm);
      transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
      height: 100%;
    }
    .feature-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-lg);
      border-color: rgba(29,111,242,0.3);
    }
    .feature-icon {
      width: 48px;
      height: 48px;
      border-radius: 12px;
      background: rgba(29,111,242,0.08);
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 20px;
      margin-bottom: 16px;
    }
    .feature-card h3 { font-size: 18px; font-weight: 600; color: var(--title); margin: 0 0 10px; }
    .feature-card p { font-size: 15px; color: var(--muted); margin: 0; }

    /* ===== Scenario rows ===== */
    .scenario-row {
      display: flex;
      align-items: center;
      gap: 64px;
      margin-bottom: 72px;
    }
    .scenario-row:last-child { margin-bottom: 0; }
    .scenario-row:nth-child(even) { flex-direction: row-reverse; }
    .scenario-media, .scenario-content { flex: 1; }
    .scenario-media img {
      width: 100%;
      border-radius: var(--radius-md);
      box-shadow: var(--shadow-md);
      border: 1px solid var(--border);
      object-fit: cover;
    }
    .scenario-content .tag {
      display: inline-block;
      background: var(--accent-soft);
      color: var(--accent);
      font-size: 13px;
      font-weight: 600;
      padding: 4px 12px;
      border-radius: 999px;
      margin-bottom: 12px;
    }
    .scenario-content h3 {
      font-size: clamp(22px, 3vw, 28px);
      font-weight: 700;
      color: var(--title);
      margin: 0 0 12px;
    }
    .scenario-content p { margin: 0 0 20px; color: var(--text); }

    /* ===== Process ===== */
    .process-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .process-step {
      background: var(--card);
      border: 1px solid var(--border);
      border-radius: var(--radius-md);
      padding: 28px;
      box-shadow: var(--shadow-sm);
      position: relative;
      transition: transform 0.3s, box-shadow 0.3s;
    }
    .process-step:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
    .process-step .step-num {
      font-family: "DIN Alternate", "Bahnschrift", monospace;
      font-size: 42px;
      font-weight: 700;
      color: var(--primary);
      line-height: 1;
      margin-bottom: 14px;
      display: block;
    }
    .process-step h3 { font-size: 18px; font-weight: 600; color: var(--title); margin: 0 0 8px; }
    .process-step p { font-size: 14px; color: var(--muted); margin: 0; }

    /* ===== Stats ===== */
    .stats-banner {
      background: var(--title);
      border-radius: var(--radius-lg);
      padding: 48px 32px;
      color: #fff;
    }
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      text-align: center;
    }
    .stat-item { padding: 8px; }
    .stat-num {
      font-family: "DIN Alternate", "Bahnschrift", monospace;
      font-size: clamp(32px, 4vw, 48px);
      font-weight: 700;
      color: var(--accent);
      line-height: 1.2;
      margin-bottom: 6px;
    }
    .stat-label { font-size: 14px; color: #B7C4D9; }

    /* ===== FAQ ===== */
    .accordion { background: transparent; margin: 0; }
    .accordion-item {
      background: #fff;
      border: 1px solid var(--border) !important;
      border-radius: 12px;
      margin-bottom: 12px;
      overflow: hidden;
      transition: border-color 0.3s, box-shadow 0.3s;
    }
    .accordion-item.is-active {
      border-color: rgba(29,111,242,0.3) !important;
      box-shadow: var(--shadow-sm);
    }
    .accordion-title {
      padding: 20px 24px !important;
      font-size: 17px;
      font-weight: 600;
      color: var(--title) !important;
      background: #fff !important;
      border-bottom: 0 !important;
      position: relative;
      padding-right: 56px !important;
    }
    .accordion-title:hover { background: rgba(29,111,242,0.04) !important; }
    .accordion-title::after {
      content: "+";
      position: absolute;
      right: 20px;
      top: 50%;
      transform: translateY(-50%);
      font-size: 26px;
      font-weight: 400;
      color: var(--primary);
      line-height: 1;
      transition: transform 0.3s;
    }
    .accordion-item.is-active .accordion-title::after { transform: translateY(-50%) rotate(135deg); }
    .accordion-content {
      padding: 0 24px 22px !important;
      border-top: 0 !important;
      background: #fff !important;
      color: var(--text) !important;
      font-size: 15px;
    }

    /* ===== CTA ===== */
    .cta-card {
      background: linear-gradient(135deg, #F0F6FF, #FFFFFF);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      text-align: center;
      padding: clamp(40px, 6vw, 64px) 24px;
      box-shadow: var(--shadow-sm);
    }
    .cta-card h2 {
      font-size: clamp(26px, 3.5vw, 36px);
      font-weight: 700;
      color: var(--title);
      margin: 0 0 14px;
    }
    .cta-card p { color: var(--text); margin: 0 0 28px; }

    /* ===== Footer ===== */
    .site-footer {
      background: #17233D;
      color: #B7C4D9;
      padding: 56px 0 24px;
      margin-top: 0;
    }
    .footer-brand .brand { color: #fff; margin-bottom: 16px; display: inline-flex; }
    .brand-light .brand-text { color: #fff; }
    .footer-brand p { font-size: 14px; color: #8897AD; margin-bottom: 16px; 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);
      color: #B7C4D9;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: background 0.2s, color 0.2s;
    }
    .footer-social a:hover { background: var(--primary); color: #fff; }
    .footer-col h4 { color: #fff; font-size: 16px; margin-bottom: 16px; }
    .footer-col a {
      display: block;
      color: #B7C4D9;
      margin-bottom: 10px;
      font-size: 14px;
      transition: color 0.2s;
    }
    .footer-col a:hover { color: #fff; }
    .footer-col p { font-size: 14px; margin-bottom: 10px; }
    .footer-col i { width: 20px; color: var(--accent); }
    .footer-bottom {
      border-top: 1px solid rgba(255,255,255,0.1);
      padding-top: 20px;
      margin-top: 32px;
      text-align: center;
      color: #8897AD;
      font-size: 13px;
    }

    /* ===== Responsive ===== */
    @media (max-width: 1024px) {
      .process-grid { grid-template-columns: repeat(2, 1fr); }
      .stats-grid { grid-template-columns: repeat(2, 1fr); }
    }

    @media (max-width: 900px) {
      .navbar { flex-wrap: wrap; border-radius: 24px; }
      .nav-list {
        position: absolute;
        top: calc(100% - 8px);
        left: 16px;
        right: 16px;
        background: #fff;
        border-radius: 16px;
        flex-direction: column;
        padding: 16px;
        box-shadow: var(--shadow-md);
        display: none;
      }
      .nav-list.is-open { display: flex; }
      .nav-link { width: 100%; text-align: center; }
      .nav-toggle { display: inline-flex; }
    }

    @media (max-width: 768px) {
      .scenario-row, .scenario-row:nth-child(even) { flex-direction: column; gap: 24px; }
      .scenario-media img { max-height: 240px; }
      .hero-actions { flex-direction: column; align-items: stretch; }
      .hero-actions .btn { width: 100%; }
    }

    @media (max-width: 600px) {
      .process-grid { grid-template-columns: 1fr; }
      .stats-grid { grid-template-columns: 1fr 1fr; }
      .nav-cta { display: none; }
    }