/* roulang page: index */
:root {
  --bg-canvas: #F5F8FC;
  --bg-card: #FFFFFF;
  --bg-weak: #EAF1FA;
  --bg-main: #F8FAFD;
  --primary: #2F6BFF;
  --primary-dark: #1B4FCC;
  --primary-light: #E3EDFC;
  --accent: #FF8A3D;
  --accent-dark: #EA6B1A;
  --accent-light: #FFF1E8;
  --text-main: #1F2A4A;
  --text-muted: #5A6B8C;
  --border: #DCE5F0;
  --footer-bg: #1A2438;
  --footer-text: #A8B4CC;
  --radius-card: 16px;
  --radius-btn: 10px;
  --radius-img: 12px;
  --shadow-card: 0 10px 30px rgba(31,58,104,0.08);
  --shadow-hover: 0 18px 40px rgba(31,58,104,0.12);
  --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "HarmonyOS Sans SC", sans-serif;
  --sidebar-width: 240px;
  --spacing-section: 80px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font-family);
  background: var(--bg-canvas);
  color: var(--text-main);
  font-size: 16px;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
button, input, textarea, select { font-family: inherit; font-size: inherit; }
ul, ol { list-style: none; }
.container { max-width: 1280px; margin: 0 auto; }

/* ===== 左侧 App Shell 导航 ===== */
.app-sidebar {
  position: fixed;
  top: 0; left: 0; bottom: 0;
  width: var(--sidebar-width);
  background: #F8FAFD;
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  padding: 24px 16px 20px;
  z-index: 100;
}
.sidebar-brand {
  display: flex; align-items: center; gap: 12px;
  padding: 8px 8px 8px 4px;
  margin-bottom: 28px;
}
.brand-icon {
  width: 44px; height: 44px;
  background: var(--primary);
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  color: #fff;
  flex-shrink: 0;
  box-shadow: 0 6px 16px rgba(47,107,255,0.28);
}
.brand-icon svg { width: 24px; height: 24px; }
.brand-text .brand-name {
  display: block;
  font-size: 18px; font-weight: 700;
  color: var(--text-main);
  line-height: 1.3;
  letter-spacing: 0.5px;
}
.brand-text .brand-tagline {
  display: block;
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.4;
}
.sidebar-nav { display: flex; flex-direction: column; gap: 4px; flex: 1; }
.sidebar-nav a {
  display: flex; align-items: center;
  height: 46px; padding: 0 16px;
  border-radius: 12px;
  font-size: 15px; font-weight: 500;
  color: var(--text-main);
  transition: background 0.2s ease, color 0.2s ease;
  position: relative;
}
.sidebar-nav a:hover { background: var(--bg-weak); }
.sidebar-nav a:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}
.sidebar-nav a.active {
  background: var(--primary-light);
  color: var(--primary-dark);
  font-weight: 600;
}
.sidebar-nav a.active::before {
  content: '';
  position: absolute;
  left: -16px; top: 50%;
  transform: translateY(-50%);
  width: 4px; height: 20px;
  background: var(--primary);
  border-radius: 0 4px 4px 0;
}
.sidebar-nav svg { width: 20px; height: 20px; margin-right: 10px; flex-shrink: 0; }
.sidebar-footer {
  border-top: 1px solid var(--border);
  padding-top: 16px;
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.7;
}
.sidebar-footer .contact-line {
  display: flex; align-items: center; gap: 6px;
  margin-bottom: 4px;
}
.sidebar-footer svg { width: 15px; height: 15px; flex-shrink: 0; }
.sidebar-copyright { font-size: 12px; color: #93A1BC; margin-top: 6px; }

/* ===== 移动端顶部栏 ===== */
.mobile-topbar {
  display: none;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  padding: 0 20px;
  background: #fff;
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; z-index: 90;
}
.mobile-brand {
  display: flex; align-items: center; gap: 10px;
  font-size: 18px; font-weight: 700;
  color: var(--text-main);
}
.mobile-brand .brand-icon { width: 36px; height: 36px; }
.mobile-brand svg { width: 20px; height: 20px; }
.menu-toggle {
  width: 44px; height: 44px;
  border: none; background: transparent;
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  color: var(--text-main);
  transition: background 0.2s;
}
.menu-toggle:hover { background: var(--bg-weak); }
.menu-toggle:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
.menu-toggle svg { width: 24px; height: 24px; }
.mobile-drawer {
  position: fixed;
  top: 0; left: 0; bottom: 0;
  width: 280px; max-width: 85vw;
  background: #F8FAFD;
  z-index: 210;
  transform: translateX(-100%);
  transition: transform 0.3s ease;
  display: flex; flex-direction: column;
  padding: 24px 20px;
  box-shadow: 4px 0 30px rgba(31,58,104,0.12);
}
.mobile-drawer.open { transform: translateX(0); }
.drawer-overlay {
  position: fixed; inset: 0;
  background: rgba(26,36,56,0.42);
  z-index: 200;
  display: none;
}
.drawer-overlay.open { display: block; }
.drawer-close {
  position: absolute; top: 16px; right: 16px;
  width: 40px; height: 40px;
  border: none; background: var(--bg-weak);
  border-radius: 10px;
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  color: var(--text-main);
  transition: background 0.2s;
}
.drawer-close:hover { background: var(--border); }
.drawer-close:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }
.drawer-close svg { width: 20px; height: 20px; }
.mobile-drawer .sidebar-nav { margin-top: 16px; }

/* ===== 主内容区 ===== */
.app-main {
  margin-left: var(--sidebar-width);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
main { flex: 1; }

/* ===== 板块通用 ===== */
.section { padding: var(--spacing-section) 56px; }
.section-head {
  margin-bottom: 40px;
  max-width: 680px;
}
.section-head .eyebrow {
  display: inline-block;
  font-size: 14px; font-weight: 600;
  color: var(--primary);
  background: var(--primary-light);
  border-radius: 999px;
  padding: 4px 14px;
  margin-bottom: 14px;
  letter-spacing: 0.5px;
}
.section-head h2 {
  font-size: 32px; font-weight: 700;
  line-height: 1.3;
  color: var(--text-main);
}
.section-head p {
  font-size: 16px;
  color: var(--text-muted);
  margin-top: 12px;
  line-height: 1.75;
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 520px;
  background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
  display: flex;
  align-items: center;
  padding: 80px 56px;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(245,248,252,0.94) 0%, rgba(245,248,252,0.78) 42%, rgba(245,248,252,0.30) 100%);
  z-index: 1;
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 640px;
}
.hero h1 {
  font-size: 46px;
  font-weight: 700;
  line-height: 1.22;
  color: var(--text-main);
  margin-bottom: 20px;
  letter-spacing: 0.5px;
}
.hero p {
  font-size: 18px;
  color: var(--text-muted);
  line-height: 1.8;
  max-width: 580px;
  margin-bottom: 32px;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; }

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 48px;
  padding: 0 28px;
  border-radius: var(--radius-btn);
  font-size: 16px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
}
.btn:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}
.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 6px 16px rgba(255,138,61,0.30);
}
.btn-primary:hover { background: var(--accent-dark); box-shadow: 0 8px 20px rgba(234,107,26,0.32); }
.btn-primary:active { background: #d95f14; transform: translateY(1px); }
.btn-secondary {
  background: transparent;
  border-color: var(--primary);
  color: var(--primary);
}
.btn-secondary:hover { background: var(--primary-light); }
.btn-secondary:active { background: #c8daff; }

/* ===== 信任数据带 ===== */
.trust-band {
  background: var(--bg-weak);
  padding: 36px 56px;
}
.trust-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  max-width: 1200px;
  margin: 0 auto;
}
.trust-item { text-align: center; }
.trust-item .trust-num {
  font-size: 44px; font-weight: 700;
  color: var(--primary);
  line-height: 1.2;
  font-variant-numeric: tabular-nums;
}
.trust-item .trust-label {
  font-size: 14px;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ===== 服务板块 ===== */
.service-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}
.service-card {
  background: var(--bg-card);
  border-radius: var(--radius-card);
  padding: 32px;
  box-shadow: var(--shadow-card);
  border: 1px solid rgba(220,229,240,0.7);
  transition: box-shadow 0.3s ease, transform 0.3s ease;
  display: flex;
  flex-direction: column;
  cursor: pointer;
}
.service-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}
.service-card:focus-within {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}
.service-icon {
  width: 56px; height: 56px;
  background: var(--primary-light);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: var(--primary);
  margin-bottom: 20px;
}
.service-icon svg { width: 26px; height: 26px; }
.service-card h3 {
  font-size: 20px; font-weight: 600;
  color: var(--text-main);
  line-height: 1.4;
  margin-bottom: 12px;
}
.service-desc {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 16px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.service-features {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px 16px;
  margin-bottom: 20px;
}
.service-features li {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  color: var(--text-main);
  line-height: 1.5;
}
.service-features svg {
  width: 16px; height: 16px;
  color: var(--primary);
  flex-shrink: 0;
}
.service-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 15px;
  font-weight: 600;
  color: var(--primary);
  margin-top: auto;
  transition: gap 0.2s ease;
}
.service-link svg { width: 16px; height: 16px; transition: transform 0.2s; }
.service-link:hover { gap: 10px; }
.service-link:hover svg { transform: translateX(2px); }
.service-link:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; border-radius: 4px; }

/* ===== 优势数据板块 ===== */
.advantage-section {
  background: var(--bg-main);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.advantage-layout {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
  align-items: center;
}
.advantage-list { display: flex; flex-direction: column; gap: 28px; }
.advantage-item { display: flex; gap: 16px; }
.advantage-item .adv-icon {
  width: 40px; height: 40px;
  flex-shrink: 0;
  background: var(--accent-light);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  color: var(--accent);
}
.advantage-item .adv-icon svg { width: 20px; height: 20px; }
.advantage-item h4 { font-size: 18px; font-weight: 600; line-height: 1.4; margin-bottom: 4px; }
.advantage-item p { font-size: 14px; color: var(--text-muted); line-height: 1.65; }
.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.stat-card {
  background: var(--bg-card);
  border-radius: var(--radius-card);
  padding: 28px 24px;
  box-shadow: var(--shadow-card);
  text-align: center;
  border: 1px solid rgba(220,229,240,0.5);
  transition: box-shadow 0.3s ease, transform 0.3s ease;
}
.stat-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-2px); }
.stat-card .stat-num {
  font-size: 40px; font-weight: 700;
  color: var(--accent);
  line-height: 1.15;
  font-variant-numeric: tabular-nums;
}
.stat-card .stat-label {
  font-size: 14px;
  color: var(--text-muted);
  margin-top: 8px;
}

/* ===== 案例板块 ===== */
.case-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}
.case-card {
  background: var(--bg-card);
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  border: 1px solid rgba(220,229,240,0.6);
  transition: box-shadow 0.3s ease, transform 0.3s ease;
  display: flex;
  flex-direction: column;
}
.case-card:hover { box-shadow: var(--shadow-hover); transform: translateY(-3px); }
.case-img { position: relative; aspect-ratio: 16 / 9; overflow: hidden; }
.case-img img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.case-card:hover .case-img img { transform: scale(1.03); }
.case-img .badge {
  position: absolute;
  top: 14px; left: 14px;
  background: rgba(31,42,74,0.78);
  color: #fff;
  backdrop-filter: blur(4px);
}
.case-body { padding: 24px; display: flex; flex-direction: column; flex: 1; }
.case-body h3 { font-size: 18px; font-weight: 600; line-height: 1.45; margin-bottom: 10px; }
.case-body p { font-size: 14px; color: var(--text-muted); line-height: 1.7; margin-bottom: 16px; flex: 1; }
.case-stats {
  display: flex;
  gap: 24px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
  margin-bottom: 16px;
}
.case-stat strong {
  display: block;
  font-size: 22px; font-weight: 700;
  color: var(--primary);
  line-height: 1.3;
}
.case-stat span { font-size: 13px; color: var(--text-muted); }
.case-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 15px; font-weight: 600;
  color: var(--primary);
  transition: gap 0.2s;
}
.case-link svg { width: 16px; height: 16px; }
.case-link:hover { gap: 10px; }
.case-link:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; border-radius: 4px; }

/* ===== 解决方案板块 ===== */
.solution-section { background: var(--bg-main); }
.solution-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
  margin-bottom: 80px;
}
.solution-row:last-child { margin-bottom: 0; }
.solution-image {
  position: relative;
  border-radius: var(--radius-img);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  aspect-ratio: 4 / 3;
}
.solution-image img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}
.solution-image:hover img { transform: scale(1.04); }
.solution-image-overlay {
  position: absolute;
  bottom: 14px; left: 14px;
  background: rgba(245,248,252,0.9);
  color: var(--primary);
  font-size: 13px; font-weight: 600;
  padding: 4px 14px;
  border-radius: 999px;
  box-shadow: 0 4px 12px rgba(31,58,104,0.1);
}
.solution-content h3 {
  font-size: 26px; font-weight: 700;
  line-height: 1.3;
  margin-bottom: 12px;
}
.solution-content > p {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 24px;
}
.solution-steps { display: flex; flex-direction: column; gap: 16px; }
.solution-step {
  display: flex; align-items: flex-start; gap: 12px;
  padding: 16px 20px;
  background: var(--bg-card);
  border-radius: 12px;
  box-shadow: 0 4px 12px rgba(31,58,104,0.06);
  border-left: 3px solid var(--primary);
  transition: box-shadow 0.2s;
}
.solution-step:hover { box-shadow: var(--shadow-card); }
.solution-step .step-num {
  font-size: 14px; font-weight: 700;
  color: var(--primary);
  background: var(--primary-light);
  border-radius: 8px;
  padding: 2px 10px;
  flex-shrink: 0;
  font-variant-numeric: tabular-nums;
}
.solution-step p { font-size: 15px; line-height: 1.6; color: var(--text-main); }
.solution-row.reverse .solution-image { order: 2; }
.solution-row.reverse .solution-content { order: 1; }

/* ===== 最新动态 ===== */
.news-layout {
  display: grid;
  grid-template-columns: 1fr 1.1fr;
  gap: 32px;
}
.news-feature {
  background: var(--bg-card);
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  border: 1px solid rgba(220,229,240,0.6);
  display: flex;
  flex-direction: column;
  transition: box-shadow 0.3s ease, transform 0.3s ease;
}
.news-feature:hover { box-shadow: var(--shadow-hover); transform: translateY(-2px); }
.feature-img { position: relative; aspect-ratio: 16 / 9; overflow: hidden; }
.feature-img img { width: 100%; height: 100%; object-fit: cover; }
.feature-img .badge {
  position: absolute;
  top: 14px; left: 14px;
  background: rgba(31,42,74,0.78);
  color: #fff;
}
.feature-content { padding: 24px; display: flex; flex-direction: column; flex: 1; }
.feature-content h3 {
  font-size: 18px; font-weight: 600;
  line-height: 1.45;
  margin-bottom: 10px;
  color: var(--text-main);
}
.feature-content p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 16px;
  flex: 1;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.feature-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 14px;
  color: var(--text-muted);
}
.news-list { display: flex; flex-direction: column; gap: 0; }
.news-row {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px 8px;
  border-bottom: 1px solid var(--border);
  min-height: 96px;
  transition: background 0.2s ease, padding-left 0.2s ease;
  width: 100%;
}
.news-row:hover { background: rgba(234,241,250,0.4); padding-left: 14px; }
.news-row:last-child { border-bottom: none; }
.news-row:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; border-radius: 8px; }
.news-row-meta { display: flex; flex-direction: column; gap: 6px; min-width: 88px; }
.news-row-meta .badge { align-self: flex-start; }
.news-date { font-size: 13px; color: var(--text-muted); font-variant-numeric: tabular-nums; white-space: nowrap; }
.news-row-body { flex: 1; min-width: 0; }
.news-row-body h4 {
  font-size: 16px; font-weight: 600;
  line-height: 1.4;
  color: var(--text-main);
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.news-row-body p {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.news-arrow {
  width: 20px; height: 20px;
  color: var(--primary);
  flex-shrink: 0;
  opacity: 0;
  transform: translateX(-4px);
  transition: opacity 0.2s, transform 0.2s;
}
.news-row:hover .news-arrow { opacity: 1; transform: translateX(0); }
.news-empty {
  min-height: 240px;
  background: var(--bg-card);
  border-radius: var(--radius-card);
  border: 1px dashed var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 14px;
}

/* ===== FAQ ===== */
.faq-section { background: var(--bg-main); }
.faq-list { max-width: 860px; margin: 0 auto; display: flex; flex-direction: column; gap: 16px; }
.faq-item {
  background: var(--bg-card);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  border: 1px solid rgba(220,229,240,0.6);
  overflow: hidden;
  transition: box-shadow 0.2s;
}
.faq-item.active { box-shadow: var(--shadow-hover); }
.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 24px;
  cursor: pointer;
  font-size: 18px;
  font-weight: 600;
  line-height: 1.4;
  color: var(--text-main);
  transition: color 0.2s;
  width: 100%;
  border: none;
  background: none;
  text-align: left;
}
.faq-question:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; border-radius: 10px; }
.faq-item.active .faq-question { color: var(--primary); }
.faq-toggle {
  width: 28px; height: 28px;
  flex-shrink: 0;
  color: var(--text-muted);
  transition: transform 0.3s ease, color 0.3s ease;
}
.faq-toggle svg { width: 20px; height: 20px; }
.faq-item.active .faq-toggle { transform: rotate(45deg); color: var(--primary); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
  padding: 0 24px;
}
.faq-item.active .faq-answer { max-height: 240px; padding-bottom: 24px; }
.faq-answer p {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.75;
  border-top: 1px solid var(--border);
  padding-top: 16px;
}

/* ===== 联系表单 ===== */
.contact-section { background: var(--bg-weak); }
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}
.contact-info h2 {
  font-size: 32px; font-weight: 700;
  line-height: 1.3;
  margin-bottom: 16px;
}
.contact-info > p {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 32px;
  max-width: 460px;
}
.contact-methods { display: flex; flex-direction: column; gap: 20px; }
.contact-method {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}
.contact-method .method-icon {
  width: 44px; height: 44px;
  background: var(--bg-card);
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  color: var(--primary);
  box-shadow: 0 4px 12px rgba(31,58,104,0.08);
  flex-shrink: 0;
}
.contact-method .method-icon svg { width: 20px; height: 20px; }
.contact-method h5 { font-size: 15px; font-weight: 600; color: var(--text-main); }
.contact-method p { font-size: 14px; color: var(--text-muted); margin-top: 2px; word-break: break-all; }
.contact-form-wrap {
  background: var(--bg-card);
  border-radius: var(--radius-card);
  padding: 32px;
  box-shadow: var(--shadow-card);
  border: 1px solid rgba(220,229,240,0.6);
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 16px; }
.form-group input,
.form-group textarea {
  width: 100%;
  height: 44px;
  padding: 0 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius-btn);
  font-size: 15px;
  color: var(--text-main);
  background: #fff;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.form-group textarea {
  height: 120px;
  padding: 12px 16px;
  resize: vertical;
  line-height: 1.6;
}
.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(47,107,255,0.14);
  outline: none;
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: #9AA8C4; }
.form-success {
  display: none;
  background: #E7F7ED;
  border: 1px solid #B8E6C6;
  border-radius: var(--radius-btn);
  padding: 14px 18px;
  font-size: 15px;
  color: #1D7A44;
  margin-bottom: 16px;
  align-items: center;
  gap: 10px;
}
.form-success svg { width: 20px; height: 20px; flex-shrink: 0; }
.form-success.show { display: flex; }
.contact-form-wrap .btn { width: 100%; }

/* ===== 页脚 ===== */
.site-footer {
  background: var(--footer-bg);
  color: var(--footer-text);
  padding: 56px 56px 0;
  margin-top: 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr 1fr 1.1fr;
  gap: 40px;
  padding-bottom: 40px;
}
.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 16px;
}
.footer-logo .brand-icon { background: var(--accent); box-shadow: 0 6px 16px rgba(255,138,61,0.28); }
.footer-logo span {
  font-size: 18px; font-weight: 700;
  color: #fff;
  letter-spacing: 0.5px;
}
.footer-about p {
  font-size: 14px;
  line-height: 1.8;
  color: var(--footer-text);
  max-width: 320px;
}
.footer-col h4 {
  font-size: 16px; font-weight: 600;
  color: #fff;
  margin-bottom: 20px;
}
.footer-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-col ul li { font-size: 14px; }
.footer-col ul a {
  color: var(--footer-text);
  transition: color 0.2s ease, padding-left 0.2s ease;
}
.footer-col ul a:hover { color: #fff; padding-left: 4px; }
.footer-col ul a:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
.footer-contact li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 14px;
  line-height: 1.6;
}
.footer-contact svg { width: 16px; height: 16px; flex-shrink: 0; margin-top: 3px; color: var(--accent); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  color: #7D8DAB;
}

/* ===== 响应式 ===== */
@media (max-width: 1199px) {
  .section { padding: 64px 32px; }
  .trust-band { padding: 32px 32px; }
  .hero { padding: 64px 32px; }
  .hero h1 { font-size: 40px; }
  .advantage-layout { gap: 40px; }
  .solution-row { gap: 40px; }
  .site-footer { padding: 48px 32px 0; }
}
@media (max-width: 1023px) {
  .app-sidebar { display: none; }
  .app-main { margin-left: 0; }
  .mobile-topbar { display: flex; }
  .section { padding: 48px 20px; }
  .trust-band { padding: 28px 20px; }
  .hero { padding: 48px 20px; }
  .hero h1 { font-size: 36px; }
  .hero p { font-size: 16px; }
  .service-grid { grid-template-columns: 1fr; }
  .advantage-layout { grid-template-columns: 1fr; }
  .case-grid { grid-template-columns: 1fr; }
  .solution-row { grid-template-columns: 1fr; gap: 32px; }
  .solution-row.reverse .solution-image { order: 0; }
  .solution-row.reverse .solution-content { order: 0; }
  .news-layout { grid-template-columns: 1fr; }
  .contact-layout { grid-template-columns: 1fr; }
  .site-footer { padding: 40px 20px 0; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  :root { --spacing-section: 48px; }
}
@media (max-width: 767px) {
  .trust-grid { grid-template-columns: 1fr 1fr; gap: 20px; }
  .trust-item .trust-num { font-size: 36px; }
  .hero { min-height: 480px; }
  .hero h1 { font-size: 30px; }
  .hero-actions { flex-direction: column; align-items: stretch; gap: 12px; }
  .btn { width: 100%; }
  .section-head h2 { font-size: 26px; }
  .service-grid { gap: 20px; }
  .service-card { padding: 24px; }
  .service-features { grid-template-columns: 1fr; }
  .stats-grid { gap: 16px; }
  .stat-card { padding: 20px 16px; }
  .stat-card .stat-num { font-size: 32px; }
  .case-grid { gap: 20px; }
  .solution-row { margin-bottom: 48px; }
  .form-row { grid-template-columns: 1fr; }
  .contact-form-wrap { padding: 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}
@media (max-width: 519px) {
  .section { padding: 40px 16px; }
  .hero { padding: 40px 16px; }
  .hero h1 { font-size: 28px; }
  .hero p { font-size: 15px; }
  .trust-grid { grid-template-columns: 1fr 1fr; }
  .trust-band { padding: 24px 16px; }
  .service-card h3 { font-size: 18px; }
  .site-footer { padding: 32px 16px 0; }
}

/* roulang page: category1 */
:root {
  --bg-canvas: #F5F8FC;
  --bg-card: #FFFFFF;
  --bg-soft: #EAF1FA;
  --primary: #2F6BFF;
  --primary-dark: #1B4FCC;
  --primary-light: #E3EDFC;
  --accent: #FF8A3D;
  --accent-hover: #EA6B1A;
  --accent-light: #FFF1E8;
  --text-main: #1F2A4A;
  --text-muted: #5A6B8C;
  --border: #DCE5F0;
  --footer-bg: #1A2438;
  --footer-text: #A8B4CC;
  --radius-lg: 16px;
  --radius-md: 12px;
  --radius-sm: 8px;
  --shadow-card: 0 10px 30px rgba(31, 58, 104, 0.08);
  --shadow-hover: 0 18px 40px rgba(31, 58, 104, 0.12);
  --font-main: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "HarmonyOS Sans SC", sans-serif;
}

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

html {
  scroll-behavior: smooth;
}

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

img {
  max-width: 100%;
  display: block;
  border-radius: var(--radius-md);
}

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

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

a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
  border-radius: 4px;
}

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

ul {
  list-style: none;
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 56px;
}

/* ===== 左侧 App Shell 导航 ===== */
.app-sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: 240px;
  height: 100vh;
  background: #F8FAFD;
  border-right: 1px solid var(--border);
  z-index: 1001;
  display: flex;
  flex-direction: column;
  padding: 24px 16px;
  transition: transform 0.3s ease;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 0 8px 20px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 20px;
}

.brand-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--primary-light);
  border-radius: 10px;
  color: var(--primary);
  flex-shrink: 0;
}

.brand-icon svg {
  width: 20px;
  height: 20px;
}

.brand-text {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
  white-space: nowrap;
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 6px;
  flex: 1;
}

.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 10px;
  height: 44px;
  padding: 0 14px;
  border-radius: 12px;
  color: var(--text-main);
  font-size: 15px;
  font-weight: 500;
  position: relative;
  transition: background 0.2s ease, color 0.2s ease;
}

.sidebar-nav a svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  color: var(--text-muted);
}

.sidebar-nav a:hover {
  background: var(--bg-soft);
  color: var(--primary-dark);
}

.sidebar-nav a:hover svg {
  color: var(--primary);
}

.sidebar-nav a.active {
  background: var(--primary-light);
  color: var(--primary-dark);
  font-weight: 600;
}

.sidebar-nav a.active svg {
  color: var(--primary);
}

.sidebar-nav a.active::before {
  content: "";
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 20px;
  border-radius: 0 4px 4px 0;
  background: var(--primary);
}

.sidebar-bottom {
  padding: 16px 8px 0;
  border-top: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.sidebar-contact {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
}

.sidebar-copy {
  font-size: 12px;
  color: #9AA8C0;
}

.mobile-header {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: 64px;
  background: #FFFFFF;
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
}

.mobile-brand {
  display: flex;
  align-items: center;
  gap: 8px;
}

.mobile-brand .brand-text {
  font-size: 16px;
}

.menu-toggle {
  width: 40px;
  height: 40px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 10px;
  color: var(--text-main);
  background: var(--bg-soft);
}

.menu-toggle svg {
  width: 20px;
  height: 20px;
}

.sidebar-overlay {
  position: fixed;
  inset: 0;
  background: rgba(26, 36, 56, 0.4);
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.3s ease, visibility 0.3s ease;
}

.sidebar-overlay.show {
  opacity: 1;
  visibility: visible;
}

/* ===== 主内容 ===== */
.page-main {
  margin-left: 240px;
  min-height: 100vh;
}

/* ===== 面包屑 ===== */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 48px 0 12px;
  font-size: 14px;
  color: var(--text-muted);
}

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

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

.breadcrumb-sep {
  color: #C0CCDC;
}

/* ===== 分类页 Hero ===== */
.category-hero {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 48px;
  align-items: center;
  padding: 24px 0 56px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  padding: 6px 14px;
  background: var(--primary-light);
  color: var(--primary-dark);
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 16px;
}

.category-hero h1 {
  font-size: 44px;
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--text-main);
  margin-bottom: 16px;
}

.category-hero .category-hero-content p {
  font-size: 17px;
  color: var(--text-muted);
  line-height: 1.8;
  max-width: 620px;
  margin-bottom: 28px;
}

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

.category-hero-media img {
  width: 100%;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  min-height: 260px;
  object-fit: cover;
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 46px;
  padding: 0 24px;
  border-radius: 10px;
  font-size: 16px;
  font-weight: 600;
  transition: background 0.2s ease, transform 0.2s ease, box-shadow 0.2s ease;
  white-space: nowrap;
}

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

.btn-primary:hover {
  background: var(--accent-hover);
  color: #FFFFFF;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(255, 138, 61, 0.25);
}

.btn-primary:active {
  background: #D95A0F;
  transform: translateY(0);
}

.btn-ghost {
  background: transparent;
  border: 1px solid var(--primary);
  color: var(--primary);
}

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

.btn-ghost-light {
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.5);
  color: #FFFFFF;
}

.btn-ghost-light:hover {
  background: rgba(255, 255, 255, 0.24);
  color: #FFFFFF;
  transform: translateY(-2px);
}

/* ===== 图文交替服务列表 ===== */
.service-list {
  padding: 56px 0 16px;
}

.service-list h2,
.scenario-section h2,
.process-section h2,
.faq-section h2 {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-main);
  margin-bottom: 12px;
}

.section-sub {
  font-size: 16px;
  color: var(--text-muted);
  margin-bottom: 48px;
  max-width: 680px;
}

.alternate-list {
  display: flex;
  flex-direction: column;
}

.alternate-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
  padding: 40px 0;
  border-bottom: 1px solid var(--border);
}

.alternate-row:first-child {
  padding-top: 8px;
}

.alternate-row:last-child {
  border-bottom: none;
}

.alternate-row:nth-child(even) .alternate-media {
  order: 2;
}

.alternate-media img {
  width: 100%;
  height: 280px;
  object-fit: cover;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.alternate-row:hover .alternate-media img {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.alternate-content .tag {
  display: inline-block;
  padding: 4px 12px;
  background: var(--accent-light);
  color: #C75B16;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 14px;
}

.alternate-content h3 {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 12px;
  line-height: 1.4;
}

.alternate-content > p {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.8;
  margin-bottom: 16px;
}

.feature-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px 24px;
  margin-bottom: 20px;
}

.feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.6;
}

.feature-list li::before {
  content: "";
  width: 16px;
  height: 16px;
  margin-top: 3px;
  flex-shrink: 0;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%232F6BFF' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6 9 17l-5-5'/%3E%3C/svg%3E");
  background-size: contain;
  background-repeat: no-repeat;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 15px;
  font-weight: 600;
  color: var(--primary);
}

.text-link span {
  transition: transform 0.3s ease;
}

.text-link:hover span {
  transform: translateX(4px);
}

/* ===== 信任数据带 ===== */
.stats-band {
  margin: 40px 0 56px;
  background: var(--bg-soft);
  border-radius: var(--radius-lg);
  padding: 40px 48px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}

.stat-item strong {
  display: block;
  font-size: 42px;
  font-weight: 700;
  color: var(--primary);
  line-height: 1.2;
  margin-bottom: 4px;
}

.stat-item span {
  font-size: 14px;
  color: var(--text-muted);
}

/* ===== 适用场景 ===== */
.scenario-section {
  padding: 24px 0 56px;
}

.scenario-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.scenario-card {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  padding: 28px;
  box-shadow: var(--shadow-card);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

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

.scenario-card .scenario-icon {
  width: 44px;
  height: 44px;
  background: var(--primary-light);
  border-radius: 12px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--primary);
  margin-bottom: 16px;
}

.scenario-card .scenario-icon svg {
  width: 22px;
  height: 22px;
}

.scenario-card h3 {
  font-size: 18px;
  font-weight: 600;
  margin-bottom: 8px;
}

.scenario-card p {
  font-size: 14px;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ===== 接入流程 ===== */
.process-section {
  padding: 56px 0;
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  margin-bottom: 56px;
  padding: 48px 56px;
}

.process-section h2 {
  text-align: center;
}

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

.process-step {
  position: relative;
  padding: 24px;
  background: var(--bg-canvas);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  text-align: center;
}

.step-num {
  display: inline-block;
  font-size: 14px;
  font-weight: 700;
  color: var(--primary);
  background: var(--primary-light);
  padding: 2px 10px;
  border-radius: 999px;
  margin-bottom: 12px;
}

.process-step h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 6px;
}

.process-step p {
  font-size: 14px;
  color: var(--text-muted);
}

/* ===== FAQ ===== */
.faq-section {
  padding: 24px 0 56px;
}

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  max-width: 860px;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 0 24px;
  box-shadow: var(--shadow-card);
  overflow: hidden;
}

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 0;
  font-size: 18px;
  font-weight: 600;
  color: var(--text-main);
  cursor: pointer;
  list-style: none;
  position: relative;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  font-size: 26px;
  font-weight: 400;
  color: var(--primary);
  flex-shrink: 0;
  transition: transform 0.3s ease;
}

.faq-item[open] summary {
  color: var(--primary);
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
}

.faq-item p {
  padding: 0 0 20px;
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.8;
  border-top: 1px solid var(--border);
  padding-top: 16px;
}

/* ===== CTA ===== */
.cta-section {
  margin-bottom: 80px;
}

.cta-inner {
  background-image: url('/assets/images/backpic/back-2.png');
  background-size: cover;
  background-position: center;
  border-radius: var(--radius-lg);
  padding: 64px 56px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-inner::before {
  content: "";
  position: absolute;
  inset: 0;
  background: rgba(31, 42, 74, 0.35);
}

.cta-inner h2,
.cta-inner p,
.cta-actions {
  position: relative;
  z-index: 1;
}

.cta-inner h2 {
  font-size: 32px;
  font-weight: 700;
  color: #FFFFFF;
  margin-bottom: 12px;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.cta-inner p {
  font-size: 16px;
  color: rgba(255, 255, 255, 0.92);
  max-width: 560px;
  margin: 0 auto 28px;
}

.cta-actions {
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--footer-bg);
  color: var(--footer-text);
  padding: 48px 56px 20px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 1fr 1fr;
  gap: 40px;
  max-width: 1200px;
  margin: 0 auto;
}

.footer-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: #FFFFFF;
  margin-bottom: 16px;
}

.footer-logo .brand-icon {
  background: rgba(47, 107, 255, 0.25);
  color: #9DB8FF;
}

.footer-logo span:last-child {
  font-size: 18px;
  font-weight: 700;
}

.footer-about p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--footer-text);
  margin-top: 12px;
  max-width: 360px;
}

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

.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.footer-col ul li a {
  color: var(--footer-text);
  font-size: 14px;
  transition: color 0.2s ease;
}

.footer-col ul li a:hover {
  color: #FFFFFF;
}

.footer-contact li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 14px;
  line-height: 1.6;
}

.footer-contact svg {
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  margin-top: 4px;
  color: #7C8DB0;
}

.footer-bottom {
  max-width: 1200px;
  margin: 40px auto 0;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  color: #7A87A0;
}

/* ===== 响应式 ===== */
@media (min-width: 1200px) {
  .page-main {
    margin-left: 240px;
  }
}

@media (max-width: 1199px) {
  .container {
    padding: 0 32px;
  }

  .category-hero {
    grid-template-columns: 1fr 0.9fr;
    gap: 32px;
  }

  .category-hero h1 {
    font-size: 40px;
  }

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

  .alternate-media img {
    height: 240px;
  }

  .stats-band {
    padding: 32px 24px;
  }
}

@media (max-width: 1023px) {
  .app-sidebar {
    transform: translateX(-100%);
  }

  .app-sidebar.open {
    transform: translateX(0);
  }

  .mobile-header {
    display: flex;
  }

  .page-main {
    margin-left: 0;
    padding-top: 64px;
  }

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

@media (max-width: 900px) {
  .container {
    padding: 0 24px;
  }

  .category-hero {
    grid-template-columns: 1fr;
    padding-top: 16px;
  }

  .category-hero-media {
    order: -1;
  }

  .category-hero-media img {
    height: 200px;
  }

  .category-hero h1 {
    font-size: 36px;
  }

  .alternate-row {
    grid-template-columns: 1fr;
    gap: 20px;
    padding: 32px 0;
  }

  .alternate-row:nth-child(even) .alternate-media {
    order: 0;
  }

  .alternate-media img {
    height: 220px;
  }

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

  .stats-band {
    grid-template-columns: 1fr 1fr;
    gap: 32px 16px;
  }

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

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

  .cta-inner {
    padding: 48px 24px;
  }

  .cta-inner h2 {
    font-size: 26px;
  }
}

@media (max-width: 767px) {
  .container {
    padding: 0 16px;
  }

  .breadcrumb {
    padding-top: 24px;
  }

  .category-hero {
    padding-bottom: 32px;
  }

  .category-hero h1 {
    font-size: 30px;
  }

  .category-hero .category-hero-content p {
    font-size: 15px;
  }

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

  .btn {
    width: 100%;
  }

  .service-list h2,
  .scenario-section h2,
  .process-section h2,
  .faq-section h2 {
    font-size: 26px;
  }

  .section-sub {
    font-size: 15px;
    margin-bottom: 28px;
  }

  .alternate-row {
    gap: 16px;
  }

  .alternate-content h3 {
    font-size: 20px;
  }

  .alternate-content > p {
    font-size: 15px;
  }

  .stats-band {
    grid-template-columns: 1fr 1fr;
    padding: 24px 16px;
    margin: 16px 0 40px;
  }

  .stat-item strong {
    font-size: 32px;
  }

  .stat-item span {
    font-size: 13px;
  }

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

  .scenario-card {
    padding: 20px;
  }

  .process-section {
    padding: 32px 16px;
    margin-bottom: 40px;
  }

  .process-steps {
    grid-template-columns: 1fr;
    margin-top: 24px;
  }

  .faq-item summary {
    font-size: 16px;
  }

  .faq-item p {
    font-size: 15px;
  }

  .cta-section {
    margin-bottom: 48px;
  }

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

  .cta-inner h2 {
    font-size: 24px;
  }

  .cta-inner p {
    font-size: 15px;
  }

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

  .site-footer {
    padding: 32px 16px 16px;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .footer-bottom {
    flex-direction: column;
    gap: 4px;
    font-size: 12px;
  }
}

/* roulang page: article */
:root {
  --primary: #2F6BFF;
  --primary-dark: #1B4FCC;
  --primary-light: #E3EDFC;
  --accent: #FF8A3D;
  --accent-hover: #EA6B1A;
  --accent-light: #FFF1E8;
  --bg: #F5F8FC;
  --card-bg: #FFFFFF;
  --bg-soft: #EAF1FA;
  --text-main: #1F2A4A;
  --text-sub: #5A6B8C;
  --border: #DCE5F0;
  --footer-bg: #1A2438;
  --footer-text: #A8B4CC;
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 10px 30px rgba(31,58,104,0.08);
  --shadow-hover: 0 18px 40px rgba(31,58,104,0.12);
  --sidebar-width: 240px;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "HarmonyOS Sans SC", sans-serif;
  background: var(--bg);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
input, textarea { font-family: inherit; }

/* ========== Mobile Header ========== */
.mobile-header {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 64px;
  background: #fff;
  border-bottom: 1px solid var(--border);
  z-index: 900;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
}
.mobile-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
}
.mobile-logo .brand-icon {
  width: 32px; height: 32px;
  background: var(--primary);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
}
.mobile-logo .brand-icon svg { width: 18px; height: 18px; }
.menu-toggle {
  width: 40px; height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  color: var(--text-main);
  transition: background .2s;
}
.menu-toggle:hover { background: var(--bg-soft); }
.menu-toggle svg { width: 22px; height: 22px; }

/* ========== Sidebar ========== */
.sidebar {
  position: fixed;
  top: 0; left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: #F8FAFD;
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  z-index: 1000;
  transition: transform .3s ease;
}
.sidebar-brand {
  padding: 28px 24px 20px;
  border-bottom: 1px solid var(--border);
}
.brand-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}
.brand-icon {
  width: 38px; height: 38px;
  background: var(--primary);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  flex-shrink: 0;
}
.brand-icon svg { width: 20px; height: 20px; }
.brand-name {
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.3;
}
.brand-sub {
  font-size: 12px;
  color: var(--text-sub);
}
.sidebar-nav {
  flex: 1;
  padding: 16px 14px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 12px;
  height: 44px;
  padding: 0 14px;
  border-radius: 12px;
  color: var(--text-main);
  font-size: 15px;
  font-weight: 500;
  position: relative;
  transition: background .2s, color .2s;
}
.sidebar-nav a svg { width: 18px; height: 18px; flex-shrink: 0; }
.sidebar-nav a:hover {
  background: var(--bg-soft);
  color: var(--primary-dark);
}
.sidebar-nav a.active {
  background: var(--primary-light);
  color: var(--primary-dark);
  font-weight: 600;
}
.sidebar-nav a.active::before {
  content: "";
  position: absolute;
  left: 0;
  top: 12px;
  bottom: 12px;
  width: 4px;
  border-radius: 0 4px 4px 0;
  background: var(--primary);
}
.sidebar-footer {
  padding: 20px 24px;
  border-top: 1px solid var(--border);
  font-size: 13px;
  color: var(--text-sub);
}
.sidebar-footer p { margin-bottom: 4px; }
.sidebar-footer .copyright { color: #9AA7BD; font-size: 12px; }

/* ========== Sidebar Overlay ========== */
.sidebar-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(26,36,56,0.5);
  z-index: 950;
}

/* ========== Main Wrapper ========== */
.main-wrapper {
  margin-left: var(--sidebar-width);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ========== Article Page ========== */
.article-page {
  padding: 48px 56px 64px;
  flex: 1;
}
.container {
  max-width: 1120px;
  margin: 0 auto;
}

/* ========== Breadcrumb ========== */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-sub);
  margin-bottom: 24px;
  flex-wrap: wrap;
}
.breadcrumb a {
  color: var(--primary);
  transition: color .2s;
}
.breadcrumb a:hover { color: var(--primary-dark); }
.breadcrumb-sep { color: #B0BDD0; }

/* ========== Article Card ========== */
.article-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 48px;
  border: 1px solid var(--border);
}
.article-header {
  margin-bottom: 40px;
  border-bottom: 1px solid var(--border);
  padding-bottom: 36px;
}
.article-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--accent-light);
  color: var(--accent-hover);
  font-size: 13px;
  font-weight: 600;
  padding: 6px 16px;
  border-radius: 999px;
  margin-bottom: 20px;
  letter-spacing: 1px;
}
.article-badge svg { width: 14px; height: 14px; }
.article-header h1 {
  font-size: 36px;
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-main);
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}
.article-meta-bar {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px 24px;
  background: var(--bg-soft);
  border-radius: 12px;
  padding: 14px 20px;
  font-size: 14px;
  color: var(--text-sub);
}
.meta-item {
  display: flex;
  align-items: center;
  gap: 6px;
}
.meta-item svg { width: 15px; height: 15px; color: var(--primary); }
.meta-item strong { color: var(--text-main); font-weight: 600; }
.meta-item .meta-cat {
  background: var(--primary-light);
  color: var(--primary-dark);
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
}

/* ========== Article Body ========== */
.article-body {
  max-width: 760px;
  margin: 0 auto;
  font-size: 17px;
  line-height: 1.9;
  color: #2A3552;
}
.article-body p {
  margin-bottom: 1.5em;
}
.article-body h2 {
  font-size: 26px;
  font-weight: 700;
  color: var(--text-main);
  margin: 2em 0 0.9em;
  padding-left: 14px;
  border-left: 4px solid var(--primary);
  line-height: 1.4;
}
.article-body h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-main);
  margin: 1.8em 0 0.8em;
  line-height: 1.4;
}
.article-body img {
  width: 100%;
  border-radius: 12px;
  margin: 1.5em 0;
  box-shadow: var(--shadow);
}
.article-body blockquote {
  border-left: 4px solid var(--primary);
  background: var(--bg-soft);
  padding: 18px 24px;
  border-radius: 0 12px 12px 0;
  margin: 1.5em 0;
  color: var(--text-sub);
  font-size: 16px;
}
.article-body ul,
.article-body ol {
  padding-left: 1.6em;
  margin-bottom: 1.5em;
}
.article-body li {
  margin-bottom: 0.5em;
}
.article-body li::marker {
  color: var(--primary);
}
.article-body table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5em 0;
  font-size: 15px;
}
.article-body th,
.article-body td {
  border: 1px solid var(--border);
  padding: 10px 14px;
  text-align: left;
}
.article-body th {
  background: var(--bg-soft);
  font-weight: 600;
  color: var(--text-main);
}
.article-body code {
  background: var(--bg-soft);
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 14px;
  color: var(--primary-dark);
}
.article-body pre {
  background: var(--footer-bg);
  color: var(--footer-text);
  padding: 20px 24px;
  border-radius: 12px;
  overflow-x: auto;
  margin: 1.5em 0;
  font-size: 14px;
  line-height: 1.7;
}
.article-body pre code {
  background: transparent;
  color: inherit;
  padding: 0;
}

/* ========== Not Found ========== */
.not-found {
  min-height: 240px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  gap: 16px;
}
.not-found svg {
  width: 56px;
  height: 56px;
  color: #B0BDD0;
}
.not-found p {
  font-size: 16px;
  color: var(--text-sub);
}
.not-found .btn-primary {
  margin-top: 8px;
}

/* ========== Article Tags ========== */
.article-tags {
  max-width: 760px;
  margin: 40px auto 0;
  padding-top: 28px;
  border-top: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.article-tags .tags-label {
  font-size: 14px;
  color: var(--text-sub);
  display: flex;
  align-items: center;
  gap: 6px;
}
.article-tags .tags-label svg { width: 15px; height: 15px; }
.tag-list {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}
.tag-item {
  display: inline-flex;
  align-items: center;
  background: var(--bg-soft);
  color: var(--text-sub);
  font-size: 13px;
  font-weight: 500;
  padding: 6px 16px;
  border-radius: 999px;
  transition: background .2s, color .2s;
}
.tag-item:hover {
  background: var(--primary-light);
  color: var(--primary-dark);
}

/* ========== Article Pagination ========== */
.article-pagination {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  gap: 16px;
  align-items: center;
  margin-top: 32px;
}
.pagination-btn {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 14px 20px;
  font-size: 14px;
  color: var(--text-main);
  transition: border-color .2s, box-shadow .2s, transform .2s;
}
.pagination-btn svg { width: 16px; height: 16px; flex-shrink: 0; color: var(--primary); }
.pagination-btn:hover {
  border-color: var(--primary);
  box-shadow: var(--shadow);
  transform: translateY(-2px);
}
.pagination-btn .pagi-label {
  display: block;
  font-size: 12px;
  color: var(--text-sub);
  margin-bottom: 2px;
}
.pagination-btn .pagi-title {
  display: block;
  font-weight: 500;
}
.back-list {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--primary);
  color: #fff;
  font-size: 14px;
  font-weight: 500;
  padding: 12px 24px;
  border-radius: 10px;
  transition: background .2s, transform .2s;
}
.back-list:hover {
  background: var(--primary-dark);
  transform: translateY(-2px);
}
.back-list svg { width: 15px; height: 15px; }
.next-btn { text-align: right; justify-content: flex-end; }

/* ========== Related Section ========== */
.related-section {
  padding: 64px 56px;
  background: var(--bg);
}
.related-section .section-head {
  text-align: center;
  margin-bottom: 40px;
}
.related-section .section-head h2 {
  font-size: 30px;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 8px;
}
.related-section .section-head p {
  font-size: 15px;
  color: var(--text-sub);
}
.related-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.news-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  transition: box-shadow .3s, transform .3s;
  display: flex;
  flex-direction: column;
}
.news-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-4px);
}
.news-card .news-img {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
}
.news-card .news-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .4s;
}
.news-card:hover .news-img img {
  transform: scale(1.05);
}
.news-card .news-cat {
  position: absolute;
  top: 12px;
  left: 12px;
  background: rgba(255,255,255,0.95);
  color: var(--primary-dark);
  font-size: 12px;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 999px;
}
.news-card .news-body {
  padding: 20px 24px 24px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.news-card .news-body h3 {
  font-size: 17px;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.4;
  margin-bottom: 10px;
}
.news-card .news-body p {
  font-size: 14px;
  color: var(--text-sub);
  line-height: 1.6;
  margin-bottom: 16px;
  flex: 1;
}
.news-card .news-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 500;
  color: var(--primary);
  transition: gap .2s;
}
.news-card .news-link svg { width: 15px; height: 15px; }
.news-card .news-link:hover { gap: 10px; }

/* ========== CTA Section ========== */
.cta-section {
  background: var(--primary);
  padding: 64px 56px;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  opacity: 0.12;
}
.cta-section .cta-content {
  position: relative;
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
  color: #fff;
}
.cta-section h2 {
  font-size: 30px;
  font-weight: 700;
  margin-bottom: 12px;
}
.cta-section p {
  font-size: 16px;
  opacity: 0.9;
  margin-bottom: 24px;
  line-height: 1.7;
}
.cta-buttons {
  display: flex;
  gap: 14px;
  justify-content: center;
  flex-wrap: wrap;
}
.cta-buttons .btn-accent {
  background: var(--accent);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  padding: 14px 32px;
  border-radius: 10px;
  transition: background .2s, transform .2s;
}
.cta-buttons .btn-accent:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
}
.cta-buttons .btn-outline-light {
  background: transparent;
  color: #fff;
  border: 1px solid rgba(255,255,255,0.6);
  font-size: 15px;
  font-weight: 500;
  padding: 14px 32px;
  border-radius: 10px;
  transition: background .2s, border-color .2s;
}
.cta-buttons .btn-outline-light:hover {
  background: rgba(255,255,255,0.1);
  border-color: #fff;
}

/* ========== Buttons ========== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--accent);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  padding: 12px 28px;
  border-radius: 10px;
  transition: background .2s, transform .2s;
}
.btn-primary:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
}
.btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: transparent;
  color: var(--primary);
  border: 1px solid var(--primary);
  font-size: 15px;
  font-weight: 500;
  padding: 12px 28px;
  border-radius: 10px;
  transition: background .2s;
}
.btn-secondary:hover {
  background: var(--primary-light);
}

/* ========== Footer ========== */
.site-footer {
  background: var(--footer-bg);
  color: var(--footer-text);
  padding: 48px 56px 0;
  margin-top: auto;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.8fr 1fr 1.2fr;
  gap: 40px;
  max-width: 1200px;
  margin: 0 auto;
  padding-bottom: 40px;
}
.footer-col h4 {
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 16px;
}
.footer-about p {
  font-size: 14px;
  line-height: 1.7;
  margin-top: 16px;
  color: var(--footer-text);
}
.footer-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  color: #fff;
  font-size: 18px;
  font-weight: 700;
}
.footer-logo .brand-icon {
  width: 34px;
  height: 34px;
  background: var(--primary);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.footer-logo .brand-icon svg { width: 18px; height: 18px; }
.footer-col ul {
  list-style: none;
}
.footer-col ul li {
  margin-bottom: 10px;
}
.footer-col ul li a {
  color: var(--footer-text);
  font-size: 14px;
  transition: color .2s, padding-left .2s;
}
.footer-col ul li a:hover {
  color: #fff;
  padding-left: 4px;
}
.footer-contact li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--footer-text);
}
.footer-contact svg {
  width: 16px;
  height: 16px;
  color: var(--primary);
  flex-shrink: 0;
}
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 20px 0;
  display: flex;
  justify-content: center;
  gap: 24px;
  flex-wrap: wrap;
  font-size: 13px;
  color: #7E8CA5;
  max-width: 1200px;
  margin: 0 auto;
}
@media (max-width: 1024px) {
  .mobile-header {
    display: flex;
  }
  .sidebar {
    transform: translateX(-100%);
  }
  .sidebar.open {
    transform: translateX(0);
  }
  .sidebar-overlay.active {
    display: block;
  }
  body.menu-open {
    overflow: hidden;
  }
  .main-wrapper {
    margin-left: 0;
    padding-top: 64px;
  }
  .article-page {
    padding: 32px 32px 48px;
  }
  .related-section {
    padding: 48px 32px;
  }
  .site-footer {
    padding: 40px 32px 0;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
  .related-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 768px) {
  .article-page {
    padding: 24px 16px 40px;
  }
  .article-card {
    padding: 28px 20px;
    border-radius: 14px;
  }
  .article-header h1 {
    font-size: 28px;
  }
  .article-meta-bar {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
  .article-body {
    font-size: 16px;
    line-height: 1.85;
  }
  .article-body h2 {
    font-size: 22px;
  }
  .article-pagination {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .back-list {
    justify-content: center;
  }
  .next-btn {
    text-align: left;
    justify-content: flex-start;
  }
  .related-section {
    padding: 40px 16px;
  }
  .related-grid {
    grid-template-columns: 1fr;
  }
  .cta-section {
    padding: 48px 20px;
  }
  .site-footer {
    padding: 36px 16px 0;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 28px;
  }
  .footer-bottom {
    flex-direction: column;
    align-items: center;
    gap: 8px;
    text-align: center;
  }
}
@media (max-width: 520px) {
  .article-header h1 {
    font-size: 24px;
  }
  .article-badge {
    font-size: 12px;
  }
  .breadcrumb {
    font-size: 13px;
  }
  .article-tags {
    gap: 8px;
  }
  .tag-item {
    font-size: 12px;
    padding: 5px 12px;
  }
  .cta-buttons .btn-accent,
  .cta-buttons .btn-outline-light {
    width: 100%;
    text-align: center;
    justify-content: center;
  }
  .pagination-btn {
    padding: 12px 16px;
    font-size: 13px;
  }
}

/* roulang page: category2 */
:root {
  --color-bg: #F5F8FC;
  --color-card: #FFFFFF;
  --color-blue-weak: #EAF1FA;
  --color-primary: #2F6BFF;
  --color-primary-dark: #1B4FCC;
  --color-primary-light: #E3EDFC;
  --color-accent: #FF8A3D;
  --color-accent-hover: #EA6B1A;
  --color-accent-light: #FFF1E8;
  --color-text: #1F2A4A;
  --color-text-secondary: #5A6B8C;
  --color-border: #DCE5F0;
  --color-footer: #1A2438;
  --color-footer-text: #A8B4CC;
  --radius-card: 16px;
  --radius-btn: 10px;
  --radius-tag: 999px;
  --radius-img: 12px;
  --shadow-card: 0 10px 30px rgba(31,58,104,0.08);
  --shadow-card-hover: 0 18px 40px rgba(31,58,104,0.12);
  --border-light: 1px solid #DCE5F0;
}

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

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", "HarmonyOS Sans SC", sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; transition: color 0.2s; }
img { display: block; max-width: 100%; }
button { font-family: inherit; }
svg { display: inline-block; flex-shrink: 0; }

/* --- App Shell --- */
.app-shell { min-height: 100vh; }

.sidebar {
  width: 240px;
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  background: #F8FAFD;
  border-right: 1px solid var(--color-border);
  display: flex;
  flex-direction: column;
  z-index: 100;
  padding: 0 16px;
  overflow-y: auto;
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 24px 14px 20px;
  text-decoration: none;
}

.brand-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: var(--color-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
}

.brand-icon svg { width: 22px; height: 22px; }

.sidebar-brand .brand-text {
  font-size: 18px;
  font-weight: 700;
  color: var(--color-text);
  letter-spacing: 0.5px;
  white-space: nowrap;
}

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-top: 10px;
}

.sidebar-nav a {
  display: flex;
  align-items: center;
  gap: 12px;
  height: 44px;
  padding: 0 14px;
  border-radius: 12px;
  color: var(--color-text);
  text-decoration: none;
  font-size: 15px;
  font-weight: 500;
  position: relative;
  transition: background 0.2s, color 0.2s;
}

.sidebar-nav a:hover { background: var(--color-blue-weak); }

.sidebar-nav a.active {
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  font-weight: 600;
}

.sidebar-nav a.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 20px;
  border-radius: 4px;
  background: var(--color-primary);
}

.sidebar-nav svg { width: 20px; height: 20px; }

.sidebar-foot {
  margin-top: auto;
  padding: 20px 14px 24px;
  border-top: 1px solid var(--color-border);
  font-size: 13px;
  color: var(--color-text-secondary);
  line-height: 1.8;
}

.sidebar-foot p { display: flex; align-items: center; gap: 8px; }
.sidebar-foot svg { width: 15px; height: 15px; opacity: 0.7; }

.main-content {
  margin-left: 240px;
  background: var(--color-bg);
}

.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 56px;
}

/* --- Mobile Topbar --- */
.mobile-topbar {
  display: none;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  padding: 0 20px;
  background: #fff;
  border-bottom: 1px solid var(--color-border);
  position: sticky;
  top: 0;
  z-index: 200;
}

.mobile-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.mobile-brand .brand-text {
  font-size: 17px;
  font-weight: 700;
  color: var(--color-text);
}

.mobile-brand .brand-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
}

.mobile-brand .brand-icon svg { width: 18px; height: 18px; }

.menu-toggle {
  width: 40px;
  height: 40px;
  border: none;
  background: var(--color-blue-weak);
  border-radius: 10px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text);
}

.menu-toggle:hover { background: var(--color-primary-light); }
.menu-toggle:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; }
.menu-toggle svg { width: 20px; height: 20px; }

.drawer-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(26, 36, 56, 0.5);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
  z-index: 150;
}

/* --- Page Header --- */
.page-header {
  position: relative;
  background: linear-gradient(100deg, rgba(245, 248, 252, 0.96) 20%, rgba(227, 237, 252, 0.82) 70%, rgba(245, 248, 252, 0.9) 100%), url('/assets/images/backpic/back-1.png') center / cover;
  padding: 76px 0 60px;
  border-bottom: 1px solid var(--color-border);
}

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--color-text-secondary);
  margin-bottom: 18px;
}

.breadcrumb a { color: var(--color-text-secondary); text-decoration: none; }
.breadcrumb a:hover { color: var(--color-primary); }
.breadcrumb .sep { color: var(--color-border); }

.page-header h1 {
  font-size: 46px;
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 18px;
  color: var(--color-text);
  letter-spacing: -0.5px;
  max-width: 720px;
}

.page-header .page-desc {
  font-size: 16px;
  color: var(--color-text-secondary);
  max-width: 700px;
  line-height: 1.8;
}

/* --- Stats Strip --- */
.stats-strip {
  background: var(--color-blue-weak);
  border-bottom: 1px solid var(--color-border);
}

.stats-inner {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
  max-width: 1280px;
  margin: 0 auto;
  padding: 40px 56px;
}

.stat-item { text-align: center; position: relative; }

.stat-item strong {
  display: block;
  font-size: 44px;
  font-weight: 700;
  color: var(--color-primary);
  line-height: 1.2;
  letter-spacing: -1px;
}

.stat-item strong em {
  font-style: normal;
  font-size: 22px;
  color: var(--color-primary-dark);
  margin-left: 2px;
}

.stat-item span {
  font-size: 14px;
  color: var(--color-text-secondary);
  display: block;
  margin-top: 6px;
}

/* --- Section Base --- */
.section { padding: 80px 0; }

.section-head {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 48px;
}

.section-head h2 {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.3;
  margin-bottom: 12px;
  color: var(--color-text);
  letter-spacing: -0.3px;
}

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

.section-head .head-tag {
  display: inline-block;
  background: var(--color-accent-light);
  color: var(--color-accent-hover);
  font-size: 13px;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: var(--radius-tag);
  margin-bottom: 14px;
}

/* --- Solution Grid --- */
.solution-section { background: var(--color-card); }

.solution-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.solution-card {
  background: var(--color-card);
  border-radius: var(--radius-card);
  border: var(--border-light);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
}

.solution-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
  border-color: #BFD0F8;
}

.solution-cover {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
  background: var(--color-blue-weak);
}

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

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

.card-tag {
  position: absolute;
  top: 14px;
  left: 14px;
  background: rgba(255, 255, 255, 0.92);
  color: var(--color-primary-dark);
  font-size: 12px;
  font-weight: 600;
  padding: 5px 14px;
  border-radius: var(--radius-tag);
  box-shadow: 0 4px 14px rgba(31, 58, 104, 0.1);
  backdrop-filter: blur(6px);
}

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

.solution-body h3 {
  font-size: 19px;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 10px;
  color: var(--color-text);
}

.solution-body p {
  font-size: 14px;
  color: var(--color-text-secondary);
  line-height: 1.75;
  margin-bottom: 18px;
  flex: 1;
}

.solution-feats {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 18px;
}

.solution-feats span {
  font-size: 12px;
  color: var(--color-primary-dark);
  background: var(--color-primary-light);
  padding: 4px 12px;
  border-radius: var(--radius-tag);
  font-weight: 500;
}

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

.text-link::after {
  content: '→';
  transition: transform 0.2s ease;
}

.text-link:hover { color: var(--color-primary-dark); }
.text-link:hover::after { transform: translateX(4px); }
.text-link:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; border-radius: 4px; }

/* --- Process Section --- */
.process-section {
  background: var(--color-bg);
}

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

.process-step {
  background: var(--color-card);
  border: var(--border-light);
  border-radius: var(--radius-card);
  padding: 28px 24px;
  position: relative;
  box-shadow: var(--shadow-card);
  transition: transform 0.25s ease, box-shadow 0.25s ease;
}

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

.step-num {
  font-size: 36px;
  font-weight: 700;
  color: var(--color-primary-light);
  line-height: 1;
  margin-bottom: 16px;
  display: block;
}

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

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

/* --- Advantage Panel --- */
.advantage-section { background: var(--color-card); }

.advantage-panel {
  background: var(--color-footer);
  border-radius: 24px;
  padding: 52px 48px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 52px;
  color: #fff;
  position: relative;
  overflow: hidden;
}

.advantage-panel::before {
  content: '';
  position: absolute;
  right: -80px;
  top: -80px;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: rgba(47, 107, 255, 0.22);
}

.advantage-intro { position: relative; z-index: 1; }

.advantage-intro h2 {
  font-size: 32px;
  font-weight: 700;
  line-height: 1.3;
  color: #fff;
  margin-bottom: 16px;
}

.advantage-intro p {
  font-size: 15px;
  color: var(--color-footer-text);
  line-height: 1.8;
  max-width: 420px;
}

.advantage-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
  position: relative;
  z-index: 1;
}

.advantage-item {
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 16px;
  padding: 20px;
  transition: background 0.25s, border-color 0.25s;
}

.advantage-item:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(47, 107, 255, 0.5);
}

.advantage-item .adv-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: var(--color-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
}

.advantage-item .adv-icon svg { width: 20px; height: 20px; }

.advantage-item h3 {
  font-size: 16px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 6px;
}

.advantage-item p {
  font-size: 13px;
  color: var(--color-footer-text);
  line-height: 1.7;
}

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

.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.faq-item {
  background: var(--color-card);
  border: var(--border-light);
  border-radius: var(--radius-card);
  padding: 24px 28px;
  box-shadow: var(--shadow-card);
  transition: border-color 0.25s, box-shadow 0.25s;
}

.faq-item.open { border-color: var(--color-primary); }

.faq-question {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  font-size: 18px;
  font-weight: 600;
  cursor: pointer;
  background: none;
  border: none;
  width: 100%;
  text-align: left;
  color: var(--color-text);
  padding: 0;
  line-height: 1.5;
}

.faq-question:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 4px; border-radius: 6px; }

.faq-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--color-primary-light);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  font-weight: 500;
  transition: transform 0.3s ease, background 0.3s, color 0.3s;
  flex-shrink: 0;
  line-height: 1;
}

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

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

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.32s ease, padding 0.32s ease;
  color: var(--color-text-secondary);
  font-size: 16px;
  line-height: 1.85;
}

.faq-item.open .faq-answer {
  max-height: 240px;
  padding-top: 14px;
}

/* --- CTA Section --- */
.cta-section {
  background: var(--color-card);
  padding: 40px 0 80px;
}

.cta-box {
  background: linear-gradient(120deg, var(--color-primary-light) 0%, #F3F7FF 50%, var(--color-accent-light) 100%);
  border-radius: 24px;
  padding: 52px 48px;
  text-align: center;
  border: 1px solid rgba(47, 107, 255, 0.12);
  position: relative;
  overflow: hidden;
}

.cta-box::before {
  content: '';
  position: absolute;
  left: -40px;
  bottom: -40px;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: rgba(47, 107, 255, 0.08);
}

.cta-box h2 {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 12px;
  color: var(--color-text);
}

.cta-box p {
  font-size: 15px;
  color: var(--color-text-secondary);
  max-width: 560px;
  margin: 0 auto 28px;
  line-height: 1.75;
}

.cta-box .btn { position: relative; z-index: 1; }

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 46px;
  padding: 0 28px;
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: background 0.2s, transform 0.2s, box-shadow 0.2s, border-color 0.2s;
}

.btn:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; }

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

.btn-primary:hover {
  background: var(--color-accent-hover);
  box-shadow: 0 8px 22px rgba(255, 138, 61, 0.35);
  transform: translateY(-2px);
}

.btn-primary:active {
  background: #D85A0E;
  transform: translateY(0);
}

.btn-ghost {
  background: transparent;
  border: 1px solid var(--color-primary);
  color: var(--color-primary);
}

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

.btn-lg { height: 52px; padding: 0 36px; font-size: 16px; border-radius: 12px; }

/* --- Footer --- */
.site-footer {
  background: var(--color-footer);
  color: var(--color-footer-text);
  padding: 48px 56px 24px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 0.8fr 1fr 1.2fr;
  gap: 40px;
  margin-bottom: 36px;
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.footer-logo .brand-icon {
  width: 36px;
  height: 36px;
  border-radius: 10px;
}

.footer-logo .brand-icon svg { width: 20px; height: 20px; }

.footer-logo span:last-child {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.5px;
}

.footer-about p {
  font-size: 14px;
  line-height: 1.8;
  margin-top: 16px;
  color: var(--color-footer-text);
}

.footer-col h4 {
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 18px;
}

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

.footer-col li { margin-bottom: 12px; }

.footer-col a {
  color: var(--color-footer-text);
  text-decoration: none;
  font-size: 14px;
  transition: color 0.2s, padding-left 0.2s;
}

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

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

.footer-contact svg { width: 16px; height: 16px; opacity: 0.8; }

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 22px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: var(--color-footer-text);
}

/* --- Responsive --- */
@media (min-width: 1200px) {
  .container { padding: 0 56px; }
}

@media (max-width: 1199px) {
  .container { padding: 0 32px; }
  .stats-inner { padding: 36px 32px; }
  .site-footer { padding: 44px 32px 24px; }
}

@media (max-width: 1023px) {
  .main-content { margin-left: 0; }
  .sidebar { transform: translateX(-100%); transition: transform 0.3s ease; box-shadow: 8px 0 30px rgba(31, 58, 104, 0.14); }
  body.drawer-open .sidebar { transform: translateX(0); }
  .drawer-overlay { display: block; }
  body.drawer-open .drawer-overlay { opacity: 1; pointer-events: auto; }
  .mobile-topbar { display: flex; }
  .page-header { padding: 56px 0 44px; }
  .page-header h1 { font-size: 36px; }
  .section { padding: 56px 0; }
  .section-head { margin-bottom: 36px; }
  .solution-grid { grid-template-columns: repeat(2, 1fr); }
  .process-grid { grid-template-columns: repeat(2, 1fr); }
  .advantage-panel { grid-template-columns: 1fr; padding: 40px 32px; gap: 36px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .stats-inner { grid-template-columns: repeat(2, 1fr); gap: 24px; }
}

@media (max-width: 767px) {
  .container { padding: 0 20px; }
  .stats-inner { padding: 28px 20px; }
  .solution-grid { grid-template-columns: 1fr; }
  .process-grid { grid-template-columns: 1fr; }
  .page-header { padding: 44px 0 36px; }
  .page-header h1 { font-size: 30px; }
  .page-header .page-desc { font-size: 15px; }
  .section { padding: 48px 0; }
  .section-head h2 { font-size: 26px; }
  .advantage-panel { padding: 32px 24px; }
  .advantage-list { grid-template-columns: 1fr; }
  .faq-item { padding: 20px; }
  .faq-question { font-size: 16px; }
  .cta-box { padding: 36px 24px; }
  .cta-box h2 { font-size: 24px; }
  .site-footer { padding: 40px 20px 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-bottom { flex-direction: column; align-items: center; text-align: center; }
}

@media (max-width: 520px) {
  .stats-inner { grid-template-columns: 1fr 1fr; gap: 18px; }
  .stat-item strong { font-size: 32px; }
  .solution-body { padding: 20px; }
  .process-step { padding: 22px 18px; }
}