/* roulang page: index */
/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text-1);
  line-height: 1.7;
  font-size: 15px;
  min-height: 100vh;
}
img { max-width: 100%; display: block; }
ul, ol { list-style: none; }
a { text-decoration: none; color: inherit; transition: color .2s ease; }
button, input, select, textarea { font-family: inherit; font-size: inherit; }
button { cursor: pointer; border: none; background: none; }
table { border-collapse: collapse; width: 100%; }

/* ===== Design Variables ===== */
:root {
  --primary: #2D6CDF;
  --primary-hover: #1F56C2;
  --primary-active: #1A4AA8;
  --primary-soft: #EAF0FA;
  --primary-soft-2: #F5F8FD;
  --accent: #F59E0B;
  --accent-soft: #FEF3C7;
  --accent-text: #B45309;
  --bg: #F4F7FB;
  --surface: #FFFFFF;
  --text-1: #172033;
  --text-2: #4E5A6A;
  --text-3: #8A94A3;
  --border: #E3E8EF;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 2px rgba(15,23,42,.06), 0 1px 3px rgba(15,23,42,.05);
  --shadow-md: 0 6px 16px rgba(15,23,42,.07);
  --shadow-lg: 0 16px 32px rgba(15,23,42,.09);
}
::selection { background: var(--primary-soft); color: var(--primary); }

/* ===== Focus Visible ===== */
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible, summary:focus-visible {
  outline: 3px solid rgba(45,108,223,.25);
  outline-offset: 2px;
  border-radius: 4px;
}

/* ===== Container ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
.container-narrow { max-width: 820px; }

/* ===== Logo ===== */
.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 700;
  color: var(--text-1);
  letter-spacing: .5px;
}
.logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--primary);
  color: #fff;
  border-radius: 10px;
  font-size: 18px;
  font-weight: 800;
}
.logo:hover .logo-mark { background: var(--primary-hover); box-shadow: var(--shadow-md); }

/* ===== Left App Shell Sidebar (desktop) ===== */
.app-sidebar {
  position: fixed;
  top: 0; left: 0;
  width: 236px;
  height: 100vh;
  background: var(--surface);
  border-right: 1px solid var(--border);
  z-index: 100;
  display: flex;
  flex-direction: column;
  padding: 0 12px;
}
.sidebar-logo {
  height: 72px;
  padding: 0 12px;
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--border);
}
.sidebar-nav {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 20px 0;
}
.sidebar-nav .nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  height: 44px;
  padding: 0 16px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-2);
  position: relative;
  transition: background .2s ease, color .2s ease;
}
.sidebar-nav .nav-item:hover {
  background: var(--primary-soft);
  color: var(--primary);
}
.sidebar-nav .nav-item.active {
  background: var(--primary-soft);
  color: var(--primary);
  font-weight: 600;
}
.sidebar-nav .nav-item.active::after {
  content: '';
  position: absolute;
  left: 0; top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 22px;
  border-radius: 0 3px 3px 0;
  background: var(--primary);
}
.sidebar-foot {
  padding: 16px 12px;
  font-size: 12px;
  color: var(--text-3);
  border-top: 1px solid var(--border);
  line-height: 1.5;
}

/* ===== Mobile Header ===== */
.mobile-header {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 60px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  z-index: 110;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
}
.mobile-header .logo { font-size: 18px; }
.mobile-header .hamburger {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  color: var(--text-1);
  transition: background .2s;
}
.mobile-header .hamburger:hover { background: var(--primary-soft); }
.mobile-header .hamburger i { font-size: 20px; }

/* ===== Drawer ===== */
.drawer-mask {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(15,23,42,.45);
  z-index: 199;
  opacity: 0;
  visibility: hidden;
  transition: opacity .25s ease, visibility .25s ease;
}
.drawer-mask.show { opacity: 1; visibility: visible; }
.drawer {
  position: fixed;
  top: 0; left: 0;
  width: 260px;
  height: 100vh;
  background: var(--surface);
  z-index: 200;
  transform: translateX(-100%);
  transition: transform .25s ease;
  display: flex;
  flex-direction: column;
  padding: 0 12px;
}
.drawer.open { transform: translateX(0); }
.drawer .drawer-close {
  position: absolute;
  top: 14px; right: 14px;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  color: var(--text-2);
  transition: background .2s;
}
.drawer .drawer-close:hover { background: var(--primary-soft); color: var(--primary); }
.drawer .drawer-logo {
  height: 60px;
  display: flex;
  align-items: center;
  padding: 0 8px;
  border-bottom: 1px solid var(--border);
}
.drawer-nav { flex: 1; padding: 20px 0; display: flex; flex-direction: column; gap: 4px; }
.drawer-nav .nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  height: 44px;
  padding: 0 16px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-2);
}
.drawer-nav .nav-item:hover { background: var(--primary-soft); color: var(--primary); }
.drawer-nav .nav-item.active { background: var(--primary-soft); color: var(--primary); font-weight: 600; }

/* ===== Main Content ===== */
.main-content {
  margin-left: 236px;
  min-height: 100vh;
}

/* ===== Section ===== */
.section { padding: 80px 0; }
.section-header {
  margin-bottom: 40px;
  max-width: 640px;
}
.section-header h2 {
  font-size: clamp(22px, 2.8vw, 32px);
  font-weight: 600;
  color: var(--text-1);
  line-height: 1.35;
  margin-bottom: 12px;
}
.section-header p {
  font-size: 16px;
  color: var(--text-2);
  line-height: 1.7;
  margin-top: 8px;
}

/* ===== Hero Section ===== */
.hero-section {
  position: relative;
  background: var(--primary-soft-2);
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero-section::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: url('/assets/images/backpic/back-1.jpg') center/cover no-repeat;
  opacity: .12;
  z-index: 0;
}
.hero-section::after {
  content: '';
  position: absolute;
  top: -120px; right: -80px;
  width: 360px;
  height: 360px;
  border-radius: 50%;
  background: rgba(45,108,223,.07);
  z-index: 0;
}
.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 40px;
  align-items: center;
  padding-top: 40px;
  padding-bottom: 40px;
  width: 100%;
}
.hero-left { grid-column: span 6; }
.hero-right { grid-column: span 6; }
.hero-left h1 {
  font-size: clamp(28px, 4vw, 44px);
  font-weight: 700;
  line-height: 1.25;
  color: var(--text-1);
  letter-spacing: 1px;
  margin-bottom: 22px;
}
.hero-left p {
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-2);
  margin-bottom: 32px;
  max-width: 520px;
}
.hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }

/* ===== Buttons ===== */
.btn-primary, .btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 46px;
  padding: 0 28px;
  border-radius: 8px;
  font-size: 15px;
  font-weight: 600;
  transition: all .2s ease;
  white-space: nowrap;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.btn-primary:active {
  background: var(--primary-active);
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}
.btn-secondary {
  background: transparent;
  color: var(--primary);
  border: 1px solid currentColor;
}
.btn-secondary:hover {
  background: var(--primary-soft);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}
.btn-secondary:active {
  background: var(--primary-soft);
  transform: translateY(0);
}

/* ===== Metric Cards ===== */
.metric-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.metric-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 26px 24px;
  display: flex;
  flex-direction: column;
  gap: 4px;
  transition: transform .25s ease, box-shadow .25s ease;
}
.metric-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 36px rgba(15,23,42,.12);
}
.metric-value {
  font-size: clamp(32px, 4vw, 42px);
  font-weight: 800;
  color: var(--primary);
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
}
.metric-label {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-2);
}
.metric-desc {
  font-size: 13px;
  color: var(--text-3);
  line-height: 1.5;
}

/* ===== Services / Bento ===== */
.services-section {
  background: var(--surface);
  padding: 80px 0;
}
.bento-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 24px;
}
.bento-card {
  border-radius: var(--radius-lg);
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease;
  position: relative;
}
.bento-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.bento-card:hover::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: var(--primary);
  z-index: 2;
}
.bento-card-large {
  grid-column: span 6;
  background: var(--primary-soft-2);
}
.bento-card-vertical { grid-column: span 3; }
.bento-card-horizontal { grid-column: span 4; }
.bento-card-img {
  height: 220px;
  overflow: hidden;
}
.bento-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .4s ease;
}
.bento-card:hover .bento-card-img img { transform: scale(1.04); }
.bento-card-body { padding: 26px 26px 30px; }
.bento-card-body .card-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: var(--primary-soft);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  margin-bottom: 16px;
  transition: background .25s, color .25s;
}
.bento-card:hover .card-icon { background: var(--primary); color: #fff; }
.bento-card-body h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-1);
  margin-bottom: 8px;
}
.bento-card-body p {
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.7;
}
.bento-card-list { margin-top: 16px; display: flex; flex-direction: column; gap: 10px; }
.bento-card-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: var(--text-2);
}
.bento-card-list li i { color: var(--primary); font-size: 13px; }

/* ===== Compare Section ===== */
.compare-section {
  background: var(--bg);
  padding: 80px 0;
}
.compare-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 28px;
  margin-top: 44px;
}
.compare-panel {
  border-radius: var(--radius-lg);
  padding: 36px 32px;
  transition: transform .25s ease, box-shadow .25s ease;
}
.compare-panel:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.compare-old {
  background: #F1F2F4;
  border: 1px solid #E5E7EB;
}
.compare-new {
  background: var(--primary-soft);
  border: 2px solid var(--primary);
  box-shadow: var(--shadow-md);
}
.compare-panel h3 {
  font-size: 19px;
  font-weight: 600;
  color: var(--text-1);
  margin-bottom: 22px;
  padding-bottom: 14px;
  border-bottom: 1px solid rgba(15,23,42,.1);
}
.compare-new h3 { color: var(--primary); border-bottom-color: rgba(45,108,223,.2); }
.compare-list { display: flex; flex-direction: column; gap: 14px; }
.compare-list li {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-2);
}
.compare-list li .icon-symbol {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
  margin-top: 1px;
}
.compare-old .icon-symbol { background: #E2E4E8; color: #6B7280; }
.compare-new .icon-symbol { background: var(--primary); color: #fff; }
.compare-note {
  margin-top: 28px;
  padding: 12px 18px;
  background: rgba(45,108,223,.06);
  border-radius: var(--radius-sm);
  font-size: 14px;
  color: var(--text-2);
  text-align: center;
}

/* ===== News / Info Section ===== */
.news-section {
  background: var(--surface);
  padding: 80px 0;
}
.news-grid {
  display: grid;
  grid-template-columns: 1fr 340px;
  gap: 40px;
  align-items: start;
}
.news-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}
.news-item {
  display: block;
  padding: 24px 20px;
  border-radius: var(--radius-md);
  border-bottom: 1px solid var(--border);
  transition: background .2s, padding-left .2s;
}
.news-item:last-child { border-bottom: none; }
.news-item:hover {
  background: var(--primary-soft-2);
  padding-left: 28px;
}
.news-item-title {
  font-size: 16px;
  font-weight: 600;
  color: var(--text-1);
  margin-bottom: 4px;
  line-height: 1.5;
}
.news-item:hover .news-item-title { color: var(--primary); }
.news-item-meta {
  font-size: 13px;
  color: var(--text-3);
}
.news-item-tag {
  display: inline-block;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 12px;
  padding: 2px 10px;
  border-radius: 999px;
  margin-right: 10px;
  font-weight: 500;
}
.news-sidebar {
  display: flex;
  flex-direction: column;
  gap: 20px;
}
.news-side-card {
  background: var(--primary-soft-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
}
.news-side-card h4 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 14px;
  color: var(--text-1);
}
.tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
.tag-cloud a {
  display: inline-block;
  background: var(--surface);
  color: var(--text-2);
  border: 1px solid var(--border);
  padding: 6px 14px;
  border-radius: 999px;
  font-size: 13px;
  font-weight: 500;
  transition: all .2s ease;
}
.tag-cloud a:hover { background: var(--primary); color: #fff; border-color: var(--primary); }
.side-feature {
  display: flex;
  gap: 14px;
  align-items: center;
}
.side-feature .side-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--accent-soft);
  color: var(--accent-text);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  flex-shrink: 0;
}
.side-feature-text h5 {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-1);
  margin-bottom: 2px;
}
.side-feature-text p {
  font-size: 13px;
  color: var(--text-2);
  line-height: 1.5;
}

/* ===== FAQ Section ===== */
.faq-section {
  background: var(--bg);
  padding: 80px 0;
}
.faq-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 36px;
}
.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition: border-color .25s ease, box-shadow .25s ease;
}
.faq-item[open] {
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}
.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  min-height: 52px;
  padding: 0 24px;
  cursor: pointer;
  font-size: 15px;
  font-weight: 600;
  color: var(--text-1);
  list-style: none;
  transition: background .2s;
  position: relative;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary:hover { background: var(--primary-soft-2); color: var(--primary); }
.faq-item summary .faq-icon {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  color: var(--text-3);
  flex-shrink: 0;
  transition: all .25s ease;
  background: var(--surface);
}
.faq-item[open] summary .faq-icon {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
  transform: rotate(45deg);
}
.faq-answer {
  padding: 0 24px 22px;
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.8;
}
.faq-answer p:last-child { margin-bottom: 0; }

/* ===== Form Section ===== */
.form-section {
  position: relative;
  background: linear-gradient(135deg, #F0F6FF 0%, #E7F0FF 100%);
  padding: 88px 0;
  overflow: hidden;
}
.form-section::before {
  content: '';
  position: absolute;
  bottom: -100px; left: -80px;
  width: 280px;
  height: 280px;
  border-radius: 50%;
  background: rgba(255,255,255,.4);
  z-index: 0;
}
.form-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}
.form-left h2 {
  font-size: clamp(24px, 2.8vw, 32px);
  font-weight: 600;
  color: var(--text-1);
  line-height: 1.35;
  margin-bottom: 16px;
}
.form-left p {
  font-size: 15px;
  color: var(--text-2);
  line-height: 1.7;
  margin-bottom: 26px;
}
.form-checklist { display: flex; flex-direction: column; gap: 14px; }
.form-checklist li {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 14px;
  color: var(--text-2);
}
.form-checklist li i {
  color: var(--primary);
  font-size: 16px;
}
.form-card {
  background: var(--surface);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 32px;
}
.form-group { margin-bottom: 18px; }
.form-label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-1);
  margin-bottom: 8px;
}
.form-input, .form-select {
  width: 100%;
  height: 44px;
  padding: 0 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  background: #fff;
  font-size: 14px;
  color: var(--text-1);
  transition: border-color .2s, box-shadow .2s;
}
.form-input:focus, .form-select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(45,108,223,.13);
  outline: none;
}
.form-input::placeholder { color: var(--text-3); }
.form-group.has-error .form-input,
.form-group.has-error .form-select { border-color: #DC2626; box-shadow: 0 0 0 3px rgba(220,38,38,.12); }
.error-message {
  display: none;
  font-size: 13px;
  color: #DC2626;
  margin-top: 6px;
}
.form-group.has-error .error-message { display: block; }
.form-submit {
  width: 100%;
  height: 48px;
  border-radius: var(--radius-sm);
  background: var(--primary);
  color: #fff;
  font-size: 15px;
  font-weight: 600;
  border: none;
  margin-top: 4px;
  transition: all .2s ease;
  box-shadow: var(--shadow-sm);
}
.form-submit:hover {
  background: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}
.form-submit:active {
  background: var(--primary-active);
  transform: translateY(0);
}
.form-privacy {
  margin-top: 14px;
  font-size: 13px;
  color: var(--text-3);
  text-align: center;
  line-height: 1.6;
}
.form-success {
  display: none;
  text-align: center;
  padding: 40px 20px;
}
.form-success .success-icon {
  width: 64px;
  height: 64px;
  border-radius: 50%;
  background: #10B981;
  color: #fff;
  font-size: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
}
.form-success h3 {
  font-size: 20px;
  font-weight: 600;
  color: var(--text-1);
  margin-bottom: 8px;
}
.form-success p {
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.7;
}

/* ===== Footer ===== */
.site-footer {
  background: #0F172A;
  color: var(--text-3);
  padding: 56px 24px 24px;
}
.footer-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1.5fr;
  gap: 40px;
  padding-bottom: 36px;
}
.footer-brand .logo { color: #fff; }
.footer-brand .logo .logo-mark { background: var(--primary); }
.footer-brand p {
  margin-top: 16px;
  font-size: 14px;
  line-height: 1.7;
  color: #94A3B8;
  max-width: 280px;
}
.footer-title {
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  margin-bottom: 18px;
  letter-spacing: .5px;
}
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links a {
  font-size: 14px;
  color: #94A3B8;
  transition: color .2s;
  display: flex;
  align-items: center;
  gap: 8px;
}
.footer-links a i { font-size: 12px; }
.footer-links a:hover { color: #fff; }
.footer-contact { display: flex; flex-direction: column; gap: 12px; }
.footer-contact li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: #94A3B8;
}
.footer-contact li i { color: var(--primary); width: 18px; text-align: center; }
.footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  border-top: 1px solid rgba(255,255,255,.1);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: #64748B;
}

/* ===== Responsive ===== */
@media (min-width: 1024px) {
  .app-sidebar { display: flex; }
  .mobile-header { display: none; }
  .main-content { margin-left: 236px; }
}
@media (max-width: 1023.98px) {
  .app-sidebar { display: none; }
  .mobile-header { display: flex; }
  .main-content { margin-left: 0; padding-top: 60px; }
  .hero-section { min-height: auto; }
  .hero-section::before { opacity: .08; }
  .section { padding: 56px 0; }
}
@media (max-width: 820px) {
  .hero-grid { grid-template-columns: 1fr; gap: 40px; padding-top: 40px; }
  .hero-left, .hero-right { grid-column: span 1; }
  .metric-grid { gap: 14px; }
  .bento-card-large, .bento-card-vertical, .bento-card-horizontal { grid-column: span 12; }
  .compare-grid { grid-template-columns: 1fr; }
  .news-grid { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; gap: 32px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .hero-section::after { display: none; }
}
@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .section { padding: 44px 0; }
  .metric-grid { gap: 12px; }
  .metric-card { padding: 18px 16px; }
  .btn-primary, .btn-secondary { width: 100%; padding: 0 16px; }
  .hero-btns { flex-direction: column; width: 100%; }
  .compare-panel { padding: 24px 18px; }
  .form-card { padding: 24px 18px; }
  .footer-bottom { flex-direction: column; text-align: center; justify-content: center; }
  .bento-card-img { height: 180px; }
  .faq-item summary { padding: 0 16px; }
  .faq-answer { padding: 0 16px 18px; }
  .form-section { padding: 56px 0; }
  .news-item { padding: 18px 12px; }
  .news-item:hover { padding-left: 16px; }
  .sidebar-foot { display: none; }
}

/* roulang page: category1 */
/* ===== Design Variables ===== */
:root {
  --primary: #2D6CDF;
  --primary-hover: #1F56C2;
  --primary-active: #1A4AA8;
  --primary-soft: #EAF0FA;
  --primary-soft-2: #F5F8FD;
  --accent: #F59E0B;
  --accent-soft: #FEF3C7;
  --accent-text: #B45309;
  --bg: #F4F7FB;
  --surface: #FFFFFF;
  --text-1: #172033;
  --text-2: #4E5A6A;
  --text-3: #8A94A3;
  --border: #E3E8EF;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 2px rgba(15,23,42,.06), 0 1px 3px rgba(15,23,42,.05);
  --shadow-md: 0 6px 16px rgba(15,23,42,.07);
  --shadow-lg: 0 16px 32px rgba(15,23,42,.09);
}

/* ===== Reset ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--bg);
  color: var(--text-1);
  line-height: 1.7;
  font-size: 15px;
  min-height: 100vh;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; transition: color .2s ease; }
ul, ol { list-style: none; }
button, input, select, textarea { font-family: inherit; font-size: inherit; }
button { cursor: pointer; border: none; background: none; }

/* ===== Focus Visible ===== */
a:focus-visible, button:focus-visible, input:focus-visible, select:focus-visible, textarea:focus-visible, summary:focus-visible {
  outline: 3px solid rgba(45,108,223,.25);
  outline-offset: 2px;
  border-radius: 4px;
}

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

/* ===== Logo ===== */
.logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 22px;
  font-weight: 700;
  color: var(--text-1);
  letter-spacing: .5px;
}
.logo-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  background: var(--primary);
  color: #fff;
  border-radius: 10px;
  font-size: 18px;
  font-weight: 800;
  transition: background .2s ease, box-shadow .2s ease;
}
.logo:hover .logo-mark { background: var(--primary-hover); box-shadow: var(--shadow-md); }

/* ===== Sidebar ===== */
.sidebar {
  position: fixed;
  top: 0; left: 0;
  width: 236px;
  height: 100vh;
  background: var(--surface);
  border-right: 1px solid var(--border);
  z-index: 100;
  display: flex;
  flex-direction: column;
}
.sidebar-logo {
  height: 72px;
  padding: 0 24px;
  display: flex;
  align-items: center;
  border-bottom: 1px solid var(--border);
}
.sidebar-nav {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 20px 12px;
}
.sidebar-nav .nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  height: 44px;
  padding: 0 16px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-2);
  position: relative;
  transition: background .2s ease, color .2s ease;
}
.sidebar-nav .nav-item:hover { background: var(--primary-soft); color: var(--primary); }
.sidebar-nav .nav-item.active {
  background: var(--primary-soft);
  color: var(--primary);
  font-weight: 600;
}
.sidebar-nav .nav-item.active::after {
  content: '';
  position: absolute;
  left: 0; top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 22px;
  border-radius: 0 3px 3px 0;
  background: var(--primary);
}
.sidebar-footer {
  padding: 16px 24px;
  border-top: 1px solid var(--border);
  font-size: 13px;
  color: var(--text-3);
  line-height: 1.6;
}

/* ===== Mobile Header ===== */
.mobile-header {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 60px;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  z-index: 110;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
}
.mobile-header .logo { font-size: 18px; }
.mobile-header .hamburger {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  color: var(--text-1);
  transition: background .2s;
}
.mobile-header .hamburger:hover { background: var(--primary-soft); }
.mobile-header .hamburger i { font-size: 20px; }

/* ===== Drawer ===== */
.drawer-mask {
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(15,23,42,.45);
  z-index: 199;
  opacity: 0;
  visibility: hidden;
  transition: opacity .25s ease, visibility .25s ease;
}
.drawer-mask.show { opacity: 1; visibility: visible; }
.drawer {
  position: fixed;
  top: 0; left: 0;
  width: 260px;
  height: 100vh;
  background: var(--surface);
  z-index: 200;
  transform: translateX(-100%);
  transition: transform .25s ease;
  display: flex;
  flex-direction: column;
  padding: 0 12px;
}
.drawer.open { transform: translateX(0); }
.drawer .drawer-close {
  position: absolute;
  top: 14px; right: 14px;
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  color: var(--text-2);
  transition: background .2s;
}
.drawer .drawer-close:hover { background: var(--primary-soft); color: var(--primary); }
.drawer .drawer-logo {
  height: 60px;
  display: flex;
  align-items: center;
  padding: 0 8px;
  border-bottom: 1px solid var(--border);
}
.drawer-nav { flex: 1; padding: 20px 0; display: flex; flex-direction: column; gap: 4px; }
.drawer-nav .nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  height: 44px;
  padding: 0 16px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 500;
  color: var(--text-2);
}
.drawer-nav .nav-item:hover { background: var(--primary-soft); color: var(--primary); }
.drawer-nav .nav-item.active { background: var(--primary-soft); color: var(--primary); font-weight: 600; }

/* ===== Main Content ===== */
.main-content {
  margin-left: 236px;
  min-height: 100vh;
}

/* ===== Section ===== */
.section { padding: 80px 0; }
.section-header {
  margin-bottom: 40px;
  max-width: 640px;
}
.section-header h2 {
  font-size: clamp(22px, 2.8vw, 32px);
  font-weight: 700;
  color: var(--text-1);
  line-height: 1.35;
  margin-bottom: 12px;
}
.section-header p {
  font-size: 16px;
  color: var(--text-2);
  line-height: 1.7;
  margin-top: 8px;
}

/* ===== Page Header ===== */
.page-header {
  background: var(--primary-soft-2);
  padding: 72px 0 56px;
  position: relative;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
}
.page-header::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: url('/assets/images/backpic/back-2.jpg') center/cover no-repeat;
  opacity: .08;
  z-index: 0;
}
.page-header .container { position: relative; z-index: 1; }
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: var(--text-3);
  margin-bottom: 20px;
}
.breadcrumb a { color: var(--text-3); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb i { font-size: 10px; color: var(--text-3); }
.breadcrumb span { color: var(--text-2); font-weight: 500; }
.page-header h1 {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 700;
  color: var(--text-1);
  line-height: 1.3;
  max-width: 760px;
  margin-bottom: 16px;
}
.page-header .lead {
  font-size: 16px;
  color: var(--text-2);
  line-height: 1.8;
  max-width: 680px;
}

/* ===== Stats Strip ===== */
.stats-strip { padding: 48px 0; background: var(--bg); }
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.stat-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 24px;
  min-height: 96px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  transition: box-shadow .25s ease, transform .25s ease;
}
.stat-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}
.stat-num {
  font-size: clamp(28px, 3vw, 36px);
  font-weight: 800;
  color: var(--primary);
  font-variant-numeric: tabular-nums;
  line-height: 1.2;
}
.stat-label {
  font-size: 14px;
  color: var(--text-2);
  font-weight: 500;
  margin-top: 4px;
}

/* ===== Service Cards ===== */
.service-section { padding: 80px 0; }
.service-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.service-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: box-shadow .25s ease, transform .25s ease, border-color .25s ease;
}
.service-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
  border-color: rgba(45,108,223,.3);
}
.service-card .card-img { position: relative; aspect-ratio: 16 / 9; overflow: hidden; }
.service-card .card-img img { width: 100%; height: 100%; object-fit: cover; }
.service-card .card-body { padding: 24px; flex: 1; display: flex; flex-direction: column; }
.service-card .card-body h3 {
  font-size: 18px;
  font-weight: 600;
  color: var(--text-1);
  margin-bottom: 8px;
  line-height: 1.45;
}
.service-card .card-body p {
  font-size: 15px;
  color: var(--text-2);
  line-height: 1.7;
  flex: 1;
}
.card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
}
.card-tags { display: flex; gap: 8px; flex-wrap: wrap; }
.tag {
  display: inline-flex;
  align-items: center;
  background: var(--accent-soft);
  color: var(--accent-text);
  font-size: 12px;
  font-weight: 500;
  padding: 4px 10px;
  border-radius: 999px;
  white-space: nowrap;
}
.text-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  transition: gap .2s ease, color .2s ease;
}
.text-link:hover { color: var(--primary-hover); gap: 10px; }
.text-link i { font-size: 12px; }

/* ===== Split Feature ===== */
.split-section { padding: 80px 0; background: var(--surface); }
.split-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}
.split-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  position: relative;
}
.split-image img { width: 100%; height: 100%; object-fit: cover; min-height: 320px; }
.split-image::after {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: linear-gradient(180deg, rgba(15,23,42,.05) 0%, rgba(15,23,42,.2) 100%);
}
.split-content h2 {
  font-size: clamp(24px, 3vw, 32px);
  font-weight: 700;
  color: var(--text-1);
  line-height: 1.35;
  margin-bottom: 16px;
}
.split-content p {
  font-size: 16px;
  color: var(--text-2);
  line-height: 1.8;
  margin-bottom: 20px;
}
.split-list { display: flex; flex-direction: column; gap: 14px; }
.split-list li {
  display: flex;
  gap: 12px;
  font-size: 15px;
  color: var(--text-1);
  line-height: 1.6;
}
.split-list li i {
  color: var(--primary);
  font-size: 16px;
  margin-top: 3px;
  flex-shrink: 0;
}
.split-list li span { color: var(--text-2); }

/* ===== FAQ ===== */
.faq-section { padding: 80px 0; background: var(--bg); }
.faq-wrap { max-width: 820px; margin: 0 auto; }
.faq-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  transition: border-color .25s ease, box-shadow .25s ease;
  overflow: hidden;
}
.faq-item[open] {
  border-color: rgba(45,108,223,.4);
  box-shadow: var(--shadow-md);
}
.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 16px 24px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 600;
  color: var(--text-1);
  line-height: 1.5;
  min-height: 48px;
  list-style: none;
  transition: background .2s ease;
}
.faq-item summary::-webkit-details-marker { display: none; }
.faq-item summary:hover { background: var(--primary-soft); }
.faq-item summary .icon {
  flex-shrink: 0;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--primary-soft);
  color: var(--primary);
  font-size: 14px;
  transition: transform .25s ease, background .2s ease;
}
.faq-item[open] summary .icon {
  transform: rotate(45deg);
  background: var(--primary);
  color: #fff;
}
.faq-answer {
  padding: 0 24px 20px;
  font-size: 15px;
  color: var(--text-2);
  line-height: 1.8;
}
.faq-answer p { margin-bottom: 8px; }
.faq-answer p:last-child { margin-bottom: 0; }

/* ===== CTA Banner ===== */
.cta-section { padding: 80px 0; }
.cta-banner {
  background: linear-gradient(135deg, #F0F6FF, #E7F0FF);
  border-radius: var(--radius-lg);
  padding: 48px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  position: relative;
  overflow: hidden;
}
.cta-banner::before {
  content: '';
  position: absolute;
  top: -60px; right: -40px;
  width: 220px;
  height: 220px;
  border-radius: 50%;
  background: rgba(45,108,223,.08);
}
.cta-banner h2 {
  font-size: clamp(22px, 2.6vw, 30px);
  font-weight: 700;
  color: var(--text-1);
  margin-bottom: 8px;
  line-height: 1.35;
}
.cta-banner p {
  font-size: 16px;
  color: var(--text-2);
  line-height: 1.7;
  max-width: 420px;
}
.cta-btn-wrap { flex-shrink: 0; position: relative; z-index: 1; }

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  height: 48px;
  padding: 0 28px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .3px;
  transition: all .25s ease;
}
.btn-primary {
  background: var(--primary);
  color: #fff;
  box-shadow: var(--shadow-sm);
}
.btn-primary:hover {
  background: var(--primary-hover);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.btn-primary:active {
  background: var(--primary-active);
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}
.btn-outline {
  background: transparent;
  color: var(--primary);
  border: 1px solid var(--primary);
}
.btn-outline:hover {
  background: var(--primary-soft);
  color: var(--primary-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-sm);
}

/* ===== Footer ===== */
.site-footer {
  background: #0F172A;
  color: #A7B2C4;
  padding: 56px 40px 24px;
  margin-top: 40px;
}
.footer-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1.2fr;
  gap: 48px;
  padding-bottom: 40px;
}
.footer-brand .logo { color: #fff; margin-bottom: 12px; }
.footer-brand .logo .logo-mark { background: var(--primary); }
.footer-brand p {
  font-size: 14px;
  line-height: 1.8;
  color: #94A3B8;
  margin-top: 8px;
  max-width: 280px;
}
.footer-title {
  font-size: 15px;
  font-weight: 600;
  color: #E2E8F0;
  margin-bottom: 16px;
}
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 14px;
  color: #94A3B8;
  transition: color .2s ease;
}
.footer-links a:hover { color: #fff; }
.footer-links a i { font-size: 10px; color: #64748B; }
.footer-contact { display: flex; flex-direction: column; gap: 10px; }
.footer-contact li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14px;
  color: #94A3B8;
}
.footer-contact li i { color: var(--primary); }
.footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  border-top: 1px solid rgba(255,255,255,.1);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 13px;
  color: #64748B;
}
.footer-bottom p { margin: 0; }

/* ===== Responsive ===== */
@media (max-width: 1023px) {
  .sidebar { display: none; }
  .mobile-header { display: flex; }
  .main-content { margin-left: 0; padding-top: 60px; }
  .page-header { padding: 48px 0 36px; }
  .section { padding: 56px 0; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .split-grid { grid-template-columns: 1fr; gap: 32px; }
  .split-image img { min-height: 240px; }
  .cta-section { padding: 48px 0; }
  .site-footer { padding: 40px 24px 24px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}

@media (max-width: 768px) {
  .container { padding: 0 20px; }
  .page-header h1 { font-size: 26px; }
  .service-grid { grid-template-columns: 1fr; gap: 16px; }
  .stats-strip { padding: 32px 0; }
  .stat-card { min-height: 80px; padding: 20px; }
  .cta-banner { flex-direction: column; align-items: flex-start; padding: 32px; gap: 20px; }
  .cta-btn-wrap { width: 100%; }
  .cta-btn-wrap .btn { width: 100%; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
  .faq-item summary { padding: 14px 18px; font-size: 15px; }
  .faq-answer { padding: 0 18px 16px; }
}

@media (max-width: 520px) {
  .stats-grid { gap: 12px; }
  .stat-card { padding: 16px; }
  .stat-num { font-size: 24px; }
  .service-card .card-body { padding: 20px; }
  .cta-banner { padding: 28px 24px; }
  .breadcrumb { font-size: 13px; }
  .page-header .lead { font-size: 15px; }
}