/* roulang page: index */
:root {
  --sidebar-width: 240px;
  --header-height: 64px;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --shadow-card: 0 4px 24px rgba(30, 58, 95, 0.08);
  --shadow-card-hover: 0 12px 40px rgba(30, 58, 95, 0.14);
  --shadow-nav: 0 2px 20px rgba(30, 58, 95, 0.06);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background-color: #f8fafc;
  color: #1e293b;
  line-height: 1.6;
}

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

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

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
  transition: var(--transition);
}

input,
textarea {
  font-family: inherit;
  outline: none;
  border: none;
}

ul {
  list-style: none;
}

/* ===== Layout ===== */
.app-layout {
  display: flex;
  min-height: 100vh;
}

/* ===== Sidebar ===== */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--sidebar-width);
  height: 100vh;
  background: #ffffff;
  border-right: 1px solid #e2e8f0;
  display: flex;
  flex-direction: column;
  z-index: 100;
  transition: var(--transition);
  box-shadow: var(--shadow-nav);
}

.sidebar-brand {
  padding: 28px 24px 20px;
  border-bottom: 1px solid #f1f5f9;
}

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

.sidebar-brand .brand-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, #1e3a5f, #3b82f6);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 18px;
  font-weight: 700;
  flex-shrink: 0;
}

.sidebar-brand .brand-text {
  font-size: 18px;
  font-weight: 700;
  color: #1e3a5f;
  letter-spacing: 0.5px;
  line-height: 1.3;
}

.sidebar-nav {
  flex: 1;
  padding: 20px 16px;
  overflow-y: auto;
}

.sidebar-nav .nav-label {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 1px;
  color: #94a3b8;
  padding: 0 8px 12px;
}

.sidebar-nav .nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  color: #475569;
  font-size: 15px;
  font-weight: 500;
  margin-bottom: 4px;
  transition: var(--transition);
  position: relative;
}

.sidebar-nav .nav-item:hover {
  background: #f1f5f9;
  color: #1e3a5f;
}

.sidebar-nav .nav-item.active {
  background: #eef2f7;
  color: #1e3a5f;
  font-weight: 600;
}

.sidebar-nav .nav-item.active::before {
  content: '';
  position: absolute;
  left: -16px;
  top: 50%;
  transform: translateY(-50%);
  width: 4px;
  height: 24px;
  background: #1e3a5f;
  border-radius: 0 4px 4px 0;
}

.sidebar-nav .nav-item .nav-icon {
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 16px;
  opacity: 0.7;
}

.sidebar-nav .nav-item:hover .nav-icon,
.sidebar-nav .nav-item.active .nav-icon {
  opacity: 1;
}

.sidebar-footer {
  padding: 16px 24px 24px;
  border-top: 1px solid #f1f5f9;
}

.sidebar-footer .sidebar-cta {
  display: block;
  width: 100%;
  padding: 12px 16px;
  background: linear-gradient(135deg, #1e3a5f, #2d5a8a);
  color: #fff;
  border-radius: var(--radius-sm);
  text-align: center;
  font-size: 14px;
  font-weight: 600;
  transition: var(--transition);
}

.sidebar-footer .sidebar-cta:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(30, 58, 95, 0.3);
}

/* ===== Mobile Header ===== */
.mobile-header {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: #ffffff;
  border-bottom: 1px solid #e2e8f0;
  padding: 0 20px;
  align-items: center;
  justify-content: space-between;
  z-index: 200;
  box-shadow: var(--shadow-nav);
}

.mobile-header .mobile-brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 17px;
  font-weight: 700;
  color: #1e3a5f;
}

.mobile-header .mobile-brand .brand-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, #1e3a5f, #3b82f6);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 15px;
  font-weight: 700;
}

.mobile-menu-btn {
  width: 40px;
  height: 40px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 5px;
  border-radius: var(--radius-sm);
  background: transparent;
  transition: var(--transition);
}

.mobile-menu-btn:hover {
  background: #f1f5f9;
}

.mobile-menu-btn span {
  display: block;
  width: 20px;
  height: 2px;
  background: #1e293b;
  border-radius: 2px;
  transition: var(--transition);
}

.mobile-menu-btn.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-btn.active span:nth-child(2) {
  opacity: 0;
}

.mobile-menu-btn.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ===== Mobile Drawer ===== */
.mobile-drawer {
  display: none;
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: #ffffff;
  z-index: 150;
  padding: 24px 20px;
  overflow-y: auto;
  transform: translateX(-100%);
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.mobile-drawer.open {
  transform: translateX(0);
}

.mobile-drawer .drawer-nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  border-radius: var(--radius-sm);
  color: #475569;
  font-size: 16px;
  font-weight: 500;
  margin-bottom: 4px;
  transition: var(--transition);
}

.mobile-drawer .drawer-nav-item:hover,
.mobile-drawer .drawer-nav-item.active {
  background: #eef2f7;
  color: #1e3a5f;
  font-weight: 600;
}

.mobile-drawer .drawer-nav-item .nav-icon {
  font-size: 18px;
  width: 24px;
  text-align: center;
}

.mobile-drawer .drawer-cta {
  display: block;
  margin-top: 24px;
  padding: 14px 20px;
  background: linear-gradient(135deg, #1e3a5f, #2d5a8a);
  color: #fff;
  border-radius: var(--radius-sm);
  text-align: center;
  font-size: 15px;
  font-weight: 600;
}

/* ===== Main Content ===== */
.main-content {
  margin-left: var(--sidebar-width);
  flex: 1;
  min-height: 100vh;
}

/* ===== Hero ===== */
.hero {
  position: relative;
  min-height: 580px;
  display: flex;
  align-items: center;
  background: linear-gradient(135deg, #0f1a2e 0%, #1a2d4a 40%, #2d5a8a 100%);
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
  opacity: 0.2;
  mix-blend-mode: overlay;
}

.hero::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 120px;
  background: linear-gradient(to top, #f8fafc, transparent);
}

.hero .hero-bg-overlay {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 30% 50%, rgba(59, 130, 246, 0.15), transparent 60%),
              radial-gradient(ellipse at 70% 50%, rgba(217, 119, 6, 0.08), transparent 50%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 640px;
  padding: 60px 56px;
}

.hero-content .hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 16px;
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: 50px;
  color: #e2e8f0;
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 24px;
}

.hero-content .hero-badge .dot {
  width: 6px;
  height: 6px;
  background: #22c55e;
  border-radius: 50%;
  animation: pulse-dot 2s infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(1.3); }
}

.hero-content h1 {
  font-size: 44px;
  font-weight: 800;
  color: #ffffff;
  line-height: 1.2;
  margin-bottom: 20px;
  letter-spacing: -1px;
}

.hero-content h1 .highlight {
  background: linear-gradient(135deg, #f5c070, #f0a83d);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-content p {
  font-size: 18px;
  color: #cbd5e1;
  line-height: 1.7;
  margin-bottom: 32px;
  max-width: 520px;
}

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

.hero-content .btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: linear-gradient(135deg, #f0a83d, #d97706);
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  box-shadow: 0 4px 16px rgba(217, 119, 6, 0.3);
}

.hero-content .btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 32px rgba(217, 119, 6, 0.4);
}

.hero-content .btn-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 32px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #e2e8f0;
  font-size: 16px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.hero-content .btn-secondary:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.3);
  transform: translateY(-3px);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 40px;
  padding-top: 32px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  max-width: 480px;
}

.hero-stats .stat-item {
  text-align: center;
}

.hero-stats .stat-number {
  font-size: 28px;
  font-weight: 800;
  color: #ffffff;
  line-height: 1.2;
}

.hero-stats .stat-label {
  font-size: 13px;
  color: #94a3b8;
  margin-top: 4px;
}

/* ===== Section ===== */
.section {
  padding: 80px 56px;
}

.section-alt {
  background: #ffffff;
}

.section-dark {
  background: #0f1a2e;
  color: #e2e8f0;
}

.section-header {
  max-width: 640px;
  margin-bottom: 48px;
}

.section-header .section-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 14px;
  background: #eef2f7;
  border-radius: 50px;
  color: #1e3a5f;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 16px;
}

.section-header .section-tag-dark {
  background: rgba(255, 255, 255, 0.1);
  color: #e2e8f0;
}

.section-header h2 {
  font-size: 32px;
  font-weight: 800;
  color: #0f172a;
  line-height: 1.25;
  letter-spacing: -0.5px;
}

.section-header h2 .highlight {
  color: #1e3a5f;
}

.section-header-dark h2 {
  color: #ffffff;
}

.section-header p {
  font-size: 16px;
  color: #64748b;
  margin-top: 12px;
  line-height: 1.7;
}

.section-header-dark p {
  color: #94a3b8;
}

/* ===== Cards ===== */
.card-grid {
  display: grid;
  gap: 24px;
}

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

.card-grid-3 {
  grid-template-columns: repeat(3, 1fr);
}

.card-grid-4 {
  grid-template-columns: repeat(4, 1fr);
}

.card {
  background: #ffffff;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: var(--transition);
  border: 1px solid #f1f5f9;
}

.card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
  border-color: #e2e8f0;
}

.card-img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  background: #e2e8f0;
}

.card-body {
  padding: 24px;
}

.card-body .card-category {
  display: inline-block;
  padding: 2px 12px;
  background: #eef2f7;
  border-radius: 50px;
  font-size: 12px;
  font-weight: 600;
  color: #1e3a5f;
  margin-bottom: 12px;
}

.card-body h3 {
  font-size: 18px;
  font-weight: 700;
  color: #0f172a;
  line-height: 1.4;
  margin-bottom: 8px;
}

.card-body p {
  font-size: 14px;
  color: #64748b;
  line-height: 1.6;
}

.card-body .card-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 16px;
  font-size: 14px;
  font-weight: 600;
  color: #1e3a5f;
}

.card-body .card-link:hover {
  gap: 10px;
}

/* Feature Card */
.feature-card {
  background: #ffffff;
  border-radius: var(--radius-md);
  padding: 32px 28px;
  box-shadow: var(--shadow-card);
  transition: var(--transition);
  border: 1px solid #f1f5f9;
  text-align: center;
}

.feature-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
  border-color: #e2e8f0;
}

.feature-card .feature-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin: 0 auto 20px;
  background: #eef2f7;
  color: #1e3a5f;
}

.feature-card h3 {
  font-size: 18px;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 14px;
  color: #64748b;
  line-height: 1.7;
}

/* Category Card */
.category-card {
  background: #ffffff;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: var(--transition);
  border: 1px solid #f1f5f9;
}

.category-card:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateY(-4px);
  border-color: #e2e8f0;
}

.category-card .cat-img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.category-card .cat-body {
  padding: 20px 24px 24px;
}

.category-card .cat-body h3 {
  font-size: 17px;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 8px;
}

.category-card .cat-body p {
  font-size: 14px;
  color: #64748b;
  line-height: 1.6;
  margin-bottom: 16px;
}

.category-card .cat-body .cat-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 20px;
  background: #1e3a5f;
  color: #fff;
  font-size: 13px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.category-card .cat-body .cat-btn:hover {
  background: #2d5a8a;
  gap: 10px;
}

/* ===== Content List (CMS) ===== */
.content-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.content-item {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  padding: 20px 24px;
  background: #ffffff;
  border-radius: var(--radius-sm);
  box-shadow: var(--shadow-card);
  transition: var(--transition);
  border: 1px solid #f1f5f9;
}

.content-item:hover {
  box-shadow: var(--shadow-card-hover);
  transform: translateX(4px);
  border-color: #e2e8f0;
}

.content-item .item-thumb {
  width: 80px;
  height: 80px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  flex-shrink: 0;
  background: #e2e8f0;
}

.content-item .item-info {
  flex: 1;
  min-width: 0;
}

.content-item .item-info .item-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 12px;
  color: #94a3b8;
  margin-bottom: 6px;
}

.content-item .item-info .item-meta .item-cat {
  padding: 2px 10px;
  background: #eef2f7;
  border-radius: 50px;
  color: #1e3a5f;
  font-weight: 600;
}

.content-item .item-info h3 {
  font-size: 16px;
  font-weight: 700;
  color: #0f172a;
  line-height: 1.4;
  margin-bottom: 4px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.content-item .item-info p {
  font-size: 14px;
  color: #64748b;
  line-height: 1.5;
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.content-item .item-link {
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: #f1f5f9;
  color: #64748b;
  transition: var(--transition);
  font-size: 16px;
}

.content-item:hover .item-link {
  background: #1e3a5f;
  color: #fff;
}

/* ===== Steps / Flow ===== */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  counter-reset: step;
}

.step-card {
  background: #ffffff;
  border-radius: var(--radius-md);
  padding: 32px 24px;
  box-shadow: var(--shadow-card);
  text-align: center;
  position: relative;
  border: 1px solid #f1f5f9;
  transition: var(--transition);
}

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

.step-card::before {
  counter-increment: step;
  content: counter(step);
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  width: 28px;
  height: 28px;
  background: #1e3a5f;
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 14px;
  font-weight: 700;
}

.step-card .step-icon {
  font-size: 32px;
  margin-bottom: 16px;
  margin-top: 8px;
  color: #1e3a5f;
}

.step-card h3 {
  font-size: 16px;
  font-weight: 700;
  color: #0f172a;
  margin-bottom: 8px;
}

.step-card p {
  font-size: 13px;
  color: #64748b;
  line-height: 1.6;
}

/* ===== FAQ ===== */
.faq-list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq-item {
  background: #ffffff;
  border-radius: var(--radius-sm);
  border: 1px solid #e2e8f0;
  overflow: hidden;
  transition: var(--transition);
}

.faq-item:hover {
  border-color: #cbd5e1;
}

.faq-item .faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 24px;
  font-size: 16px;
  font-weight: 600;
  color: #0f172a;
  cursor: pointer;
  transition: var(--transition);
  background: transparent;
  width: 100%;
  text-align: left;
}

.faq-item .faq-question:hover {
  background: #f8fafc;
}

.faq-item .faq-question .faq-icon {
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  color: #94a3b8;
  transition: var(--transition);
  flex-shrink: 0;
}

.faq-item.active .faq-question .faq-icon {
  transform: rotate(45deg);
  color: #1e3a5f;
}

.faq-item .faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
  padding: 0 24px;
  color: #475569;
  font-size: 15px;
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 300px;
  padding: 0 24px 20px;
}

/* ===== CTA ===== */
.cta-section {
  background: linear-gradient(135deg, #0f1a2e 0%, #1a2d4a 50%, #2d5a8a 100%);
  padding: 80px 56px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, rgba(217, 119, 6, 0.08), transparent 70%);
  pointer-events: none;
}

.cta-section h2 {
  font-size: 36px;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 16px;
  position: relative;
  z-index: 1;
}

.cta-section p {
  font-size: 18px;
  color: #94a3b8;
  max-width: 560px;
  margin: 0 auto 32px;
  position: relative;
  z-index: 1;
}

.cta-section .cta-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
  position: relative;
  z-index: 1;
}

.cta-section .btn-cta-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 16px 36px;
  background: linear-gradient(135deg, #f0a83d, #d97706);
  color: #fff;
  font-size: 16px;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  box-shadow: 0 4px 16px rgba(217, 119, 6, 0.3);
}

.cta-section .btn-cta-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 8px 32px rgba(217, 119, 6, 0.4);
}

.cta-section .btn-cta-secondary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 16px 36px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: #e2e8f0;
  font-size: 16px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.cta-section .btn-cta-secondary:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.3);
  transform: translateY(-3px);
}

/* ===== Footer ===== */
.footer {
  background: #0f172a;
  color: #94a3b8;
  padding: 48px 56px 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand .footer-logo {
  font-size: 20px;
  font-weight: 700;
  color: #ffffff;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.footer-brand .footer-logo .logo-icon {
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, #1e3a5f, #3b82f6);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 15px;
  font-weight: 700;
}

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

.footer-col h4 {
  font-size: 14px;
  font-weight: 700;
  color: #e2e8f0;
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}

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

.footer-col ul li a {
  font-size: 14px;
  color: #94a3b8;
  transition: var(--transition);
}

.footer-col ul li a:hover {
  color: #e2e8f0;
  padding-left: 4px;
}

.footer-bottom {
  border-top: 1px solid #1e293b;
  padding-top: 24px;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  font-size: 13px;
  color: #64748b;
}

.footer-bottom a {
  color: #94a3b8;
}

.footer-bottom a:hover {
  color: #e2e8f0;
}

/* ===== Empty State ===== */
.empty-state {
  text-align: center;
  padding: 48px 24px;
  background: #ffffff;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  border: 1px dashed #e2e8f0;
}

.empty-state .empty-icon {
  font-size: 48px;
  color: #cbd5e1;
  margin-bottom: 16px;
}

.empty-state p {
  font-size: 16px;
  color: #64748b;
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
  .hero-content h1 {
    font-size: 36px;
  }
  .section {
    padding: 64px 40px;
  }
  .card-grid-4 {
    grid-template-columns: repeat(2, 1fr);
  }
  .steps-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 32px;
  }
}

@media (max-width: 768px) {
  .sidebar {
    display: none;
  }
  .mobile-header {
    display: flex;
  }
  .mobile-drawer {
    display: block;
  }
  .main-content {
    margin-left: 0;
    padding-top: var(--header-height);
  }
  .hero {
    min-height: 480px;
  }
  .hero-content {
    padding: 40px 24px;
  }
  .hero-content h1 {
    font-size: 30px;
  }
  .hero-content p {
    font-size: 16px;
  }
  .hero-stats {
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
  }
  .hero-stats .stat-number {
    font-size: 22px;
  }
  .section {
    padding: 48px 24px;
  }
  .section-header h2 {
    font-size: 26px;
  }
  .card-grid-2,
  .card-grid-3,
  .card-grid-4 {
    grid-template-columns: 1fr;
  }
  .steps-grid {
    grid-template-columns: 1fr 1fr;
    gap: 20px;
  }
  .content-item {
    flex-direction: column;
    gap: 12px;
    padding: 16px;
  }
  .content-item .item-thumb {
    width: 100%;
    height: 140px;
  }
  .content-item .item-link {
    align-self: flex-end;
  }
  .cta-section {
    padding: 56px 24px;
  }
  .cta-section h2 {
    font-size: 28px;
  }
  .footer {
    padding: 36px 24px 24px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero-content h1 {
    font-size: 26px;
  }
  .hero-content .hero-actions {
    flex-direction: column;
  }
  .hero-content .hero-actions a {
    width: 100%;
    justify-content: center;
  }
  .hero-stats {
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
  }
  .hero-stats .stat-number {
    font-size: 20px;
  }
  .hero-stats .stat-label {
    font-size: 12px;
  }
  .section {
    padding: 36px 16px;
  }
  .section-header h2 {
    font-size: 22px;
  }
  .steps-grid {
    grid-template-columns: 1fr;
  }
  .cta-section h2 {
    font-size: 24px;
  }
  .cta-section .cta-actions {
    flex-direction: column;
    align-items: center;
  }
  .cta-section .cta-actions a {
    width: 100%;
    justify-content: center;
  }
}

/* roulang page: article */
:root {
            --primary: #1a56db;
            --primary-dark: #0f3b8e;
            --primary-light: #e8eefb;
            --accent: #f59e0b;
            --accent-light: #fef3c7;
            --bg-body: #f8fafc;
            --bg-card: #ffffff;
            --text-dark: #0f172a;
            --text-main: #1e293b;
            --text-muted: #64748b;
            --text-light: #94a3b8;
            --border: #e2e8f0;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
            --shadow-md: 0 4px 16px rgba(0,0,0,0.08);
            --shadow-lg: 0 12px 40px rgba(0,0,0,0.10);
            --radius: 12px;
            --radius-sm: 8px;
            --radius-lg: 16px;
            --sidebar-width: 240px;
        }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
            background: var(--bg-body);
            color: var(--text-main);
            line-height: 1.7;
            -webkit-font-smoothing: antialiased;
        }
        a { color: inherit; text-decoration: none; transition: color 0.2s; }
        img { max-width: 100%; height: auto; display: block; }
        button, input, textarea { font-family: inherit; }

        /* Layout */
        .app-layout {
            display: flex;
            min-height: 100vh;
        }
        .sidebar {
            width: var(--sidebar-width);
            background: #ffffff;
            border-right: 1px solid var(--border);
            position: fixed;
            top: 0;
            left: 0;
            bottom: 0;
            z-index: 50;
            display: flex;
            flex-direction: column;
            transition: transform 0.3s ease;
        }
        .main-area {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }
        .container-page {
            max-width: 880px;
            width: 100%;
            margin: 0 auto;
            padding: 40px 32px 60px;
        }

        /* Sidebar */
        .sidebar-brand {
            padding: 28px 24px 20px;
            border-bottom: 1px solid var(--border);
        }
        .sidebar-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: var(--text-dark);
            letter-spacing: -0.3px;
        }
        .sidebar-logo .logo-icon {
            width: 36px;
            height: 36px;
            background: var(--primary);
            color: #fff;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 700;
            flex-shrink: 0;
        }
        .sidebar-nav {
            padding: 16px 12px;
            flex: 1;
            overflow-y: auto;
        }
        .nav-label {
            font-size: 11px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.8px;
            color: var(--text-light);
            padding: 8px 12px 6px;
        }
        .nav-item {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 14px;
            border-radius: var(--radius-sm);
            color: var(--text-muted);
            font-size: 14px;
            font-weight: 500;
            transition: all 0.2s;
            margin-bottom: 2px;
        }
        .nav-item:hover {
            background: var(--primary-light);
            color: var(--primary);
        }
        .nav-item.active {
            background: var(--primary);
            color: #fff;
            font-weight: 600;
            box-shadow: 0 2px 8px rgba(26,86,219,0.25);
        }
        .nav-icon { font-size: 16px; width: 20px; text-align: center; }

        /* Mobile header */
        .mobile-header {
            display: none;
            background: #fff;
            border-bottom: 1px solid var(--border);
            padding: 12px 20px;
            align-items: center;
            justify-content: space-between;
            position: sticky;
            top: 0;
            z-index: 60;
        }
        .mobile-header .sidebar-logo { font-size: 18px; }
        .mobile-toggle {
            background: none;
            border: none;
            font-size: 22px;
            color: var(--text-dark);
            cursor: pointer;
            padding: 4px 8px;
            border-radius: 6px;
        }
        .mobile-toggle:hover { background: var(--bg-body); }

        /* Article */
        .article-header {
            margin-bottom: 32px;
        }
        .article-breadcrumb {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 13px;
            color: var(--text-muted);
            margin-bottom: 16px;
            flex-wrap: wrap;
        }
        .article-breadcrumb a {
            color: var(--primary);
        }
        .article-breadcrumb a:hover {
            text-decoration: underline;
        }
        .article-breadcrumb .sep {
            color: var(--text-light);
        }
        .article-category {
            display: inline-block;
            background: var(--primary-light);
            color: var(--primary);
            font-size: 12px;
            font-weight: 600;
            padding: 4px 14px;
            border-radius: 20px;
            margin-bottom: 12px;
        }
        .article-title {
            font-size: 32px;
            font-weight: 700;
            line-height: 1.3;
            color: var(--text-dark);
            margin-bottom: 12px;
            letter-spacing: -0.4px;
        }
        .article-meta {
            display: flex;
            align-items: center;
            gap: 20px;
            font-size: 13px;
            color: var(--text-muted);
            flex-wrap: wrap;
        }
        .article-meta i {
            margin-right: 4px;
            color: var(--text-light);
        }
        .article-cover {
            margin-bottom: 32px;
            border-radius: var(--radius);
            overflow: hidden;
            box-shadow: var(--shadow-sm);
        }
        .article-cover img {
            width: 100%;
            height: auto;
            aspect-ratio: 16/9;
            object-fit: cover;
        }
        .article-body {
            font-size: 16px;
            line-height: 1.9;
            color: var(--text-main);
        }
        .article-body p {
            margin-bottom: 1.2em;
        }
        .article-body h2 {
            font-size: 24px;
            font-weight: 700;
            color: var(--text-dark);
            margin: 40px 0 16px;
        }
        .article-body h3 {
            font-size: 20px;
            font-weight: 600;
            color: var(--text-dark);
            margin: 32px 0 12px;
        }
        .article-body ul, .article-body ol {
            margin: 0 0 1.2em 1.6em;
        }
        .article-body li {
            margin-bottom: 6px;
        }
        .article-body a {
            color: var(--primary);
            text-decoration: underline;
        }
        .article-body a:hover {
            color: var(--primary-dark);
        }
        .article-body blockquote {
            border-left: 4px solid var(--primary);
            background: var(--primary-light);
            padding: 16px 20px;
            margin: 24px 0;
            border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
            color: var(--text-dark);
            font-style: normal;
        }
        .article-body img {
            border-radius: var(--radius-sm);
            margin: 24px auto;
            box-shadow: var(--shadow-sm);
        }
        .article-body code {
            background: #f1f5f9;
            padding: 2px 8px;
            border-radius: 4px;
            font-size: 0.9em;
        }
        .article-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 8px;
            margin-top: 32px;
            padding-top: 20px;
            border-top: 1px solid var(--border);
        }
        .article-tag {
            background: var(--bg-body);
            color: var(--text-muted);
            font-size: 12px;
            padding: 4px 14px;
            border-radius: 20px;
            border: 1px solid var(--border);
            transition: all 0.2s;
        }
        .article-tag:hover {
            border-color: var(--primary);
            color: var(--primary);
        }
        .article-nav {
            display: flex;
            justify-content: space-between;
            gap: 16px;
            margin-top: 48px;
            padding-top: 24px;
            border-top: 1px solid var(--border);
        }
        .article-nav a {
            display: flex;
            align-items: center;
            gap: 8px;
            color: var(--primary);
            font-weight: 500;
            font-size: 14px;
            transition: all 0.2s;
        }
        .article-nav a:hover {
            color: var(--primary-dark);
            gap: 12px;
        }
        .article-nav .nav-next {
            text-align: right;
        }

        /* Not found */
        .not-found-box {
            text-align: center;
            padding: 80px 20px;
        }
        .not-found-box .icon {
            font-size: 64px;
            color: var(--text-light);
            margin-bottom: 20px;
        }
        .not-found-box h2 {
            font-size: 24px;
            color: var(--text-dark);
            margin-bottom: 12px;
        }
        .not-found-box p {
            color: var(--text-muted);
            margin-bottom: 24px;
        }
        .not-found-box .btn-back {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: var(--primary);
            color: #fff;
            padding: 10px 28px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            transition: all 0.2s;
        }
        .not-found-box .btn-back:hover {
            background: var(--primary-dark);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }

        /* Footer */
        .footer {
            background: #0f172a;
            color: #cbd5e1;
            padding: 56px 32px 32px;
            margin-top: auto;
        }
        .footer .max-w-6xl { max-width: 1200px; margin: 0 auto; }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 40px;
        }
        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
        }
        .footer-logo .logo-icon {
            width: 32px;
            height: 32px;
            background: var(--primary);
            color: #fff;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 16px;
            font-weight: 700;
        }
        .footer-brand p {
            font-size: 14px;
            line-height: 1.7;
            color: #94a3b8;
            max-width: 320px;
        }
        .footer-col h4 {
            color: #fff;
            font-size: 14px;
            font-weight: 600;
            margin-bottom: 16px;
        }
        .footer-col ul {
            list-style: none;
            padding: 0;
        }
        .footer-col ul li {
            margin-bottom: 10px;
        }
        .footer-col ul li a {
            color: #94a3b8;
            font-size: 13px;
            transition: color 0.2s;
        }
        .footer-col ul li a:hover {
            color: #fff;
        }
        .footer-col ul li span {
            font-size: 13px;
            color: #64748b;
        }
        .footer-bottom {
            border-top: 1px solid #1e293b;
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: #64748b;
        }

        /* Overlay for mobile */
        .sidebar-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0,0,0,0.4);
            z-index: 45;
        }

        /* Responsive */
        @media (max-width: 1024px) {
            .container-page {
                padding: 32px 24px 48px;
                max-width: 100%;
            }
            .article-title {
                font-size: 28px;
            }
        }
        @media (max-width: 768px) {
            .sidebar {
                transform: translateX(-100%);
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .sidebar-overlay.open {
                display: block;
            }
            .main-area {
                margin-left: 0;
            }
            .mobile-header {
                display: flex;
            }
            .container-page {
                padding: 24px 18px 40px;
            }
            .article-title {
                font-size: 24px;
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .footer-brand p {
                max-width: 100%;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .article-nav {
                flex-direction: column;
                gap: 12px;
            }
            .article-nav .nav-next {
                text-align: left;
            }
        }
        @media (max-width: 520px) {
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .article-meta {
                gap: 12px;
                font-size: 12px;
            }
            .container-page {
                padding: 16px 14px 32px;
            }
            .article-title {
                font-size: 20px;
            }
            .article-body {
                font-size: 15px;
            }
        }

/* roulang page: category1 */
:root {
            --primary: #1e40af;
            --primary-light: #3b82f6;
            --primary-dark: #1e3a8a;
            --primary-bg: #eff6ff;
            --accent: #f59e0b;
            --accent-light: #fbbf24;
            --accent-dark: #d97706;
            --text-dark: #1f2937;
            --text-light: #6b7280;
            --text-lighter: #9ca3af;
            --bg-light: #f8fafc;
            --border-color: #e5e7eb;
            --radius: 12px;
            --radius-sm: 8px;
            --shadow: 0 4px 20px rgba(0,0,0,0.06);
            --shadow-hover: 0 12px 40px rgba(0,0,0,0.12);
            --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
        }
        * { box-sizing: border-box; margin: 0; padding: 0; }
        body {
            font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            background: #ffffff;
            color: var(--text-dark);
            line-height: 1.6;
            display: flex;
            min-height: 100vh;
        }
        a { color: inherit; text-decoration: none; transition: var(--transition); }
        img { max-width: 100%; height: auto; display: block; }
        .container-custom { max-width: 1200px; margin: 0 auto; padding: 0 24px; }
        .fade-in { animation: fadeIn 0.6s ease-out both; }
        @keyframes fadeIn { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
        .stagger-1 { animation-delay: 0.1s; }
        .stagger-2 { animation-delay: 0.2s; }
        .stagger-3 { animation-delay: 0.3s; }
        .stagger-4 { animation-delay: 0.4s; }

        /* ===== 左侧导航 ===== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: 240px;
            height: 100vh;
            background: #ffffff;
            border-right: 1px solid var(--border-color);
            display: flex;
            flex-direction: column;
            z-index: 1000;
            transition: var(--transition);
            overflow-y: auto;
        }
        .sidebar-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 28px 20px 20px;
            font-size: 1.3rem;
            font-weight: 700;
            color: var(--primary);
            border-bottom: 1px solid var(--border-color);
        }
        .sidebar-logo .logo-icon {
            width: 36px;
            height: 36px;
            background: var(--primary);
            color: #fff;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            font-weight: 700;
        }
        .sidebar-nav {
            padding: 16px 12px;
            flex: 1;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }
        .sidebar-nav .nav-label {
            font-size: 0.7rem;
            text-transform: uppercase;
            letter-spacing: 0.08em;
            color: var(--text-lighter);
            padding: 8px 12px 6px;
            font-weight: 600;
        }
        .sidebar-nav .nav-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 10px 16px;
            border-radius: 10px;
            font-size: 0.95rem;
            font-weight: 500;
            color: var(--text-light);
            transition: var(--transition);
        }
        .sidebar-nav .nav-item .nav-icon { font-size: 1.1rem; width: 24px; text-align: center; flex-shrink: 0; }
        .sidebar-nav .nav-item:hover { background: var(--primary-bg); color: var(--primary); }
        .sidebar-nav .nav-item.active {
            background: var(--primary);
            color: #ffffff;
            box-shadow: 0 4px 12px rgba(30,64,175,0.25);
        }
        .sidebar-nav .nav-item.active .nav-icon { color: #fff; }

        /* ===== 主内容区 ===== */
        .main-content {
            margin-left: 240px;
            flex: 1;
            min-height: 100vh;
            background: #ffffff;
        }

        /* ===== 页脚 ===== */
        .footer {
            background: #0f172a;
            color: #cbd5e1;
            padding: 48px 24px 32px;
        }
        .footer .footer-grid {
            display: grid;
            grid-template-columns: 1.6fr 1fr 1fr 1fr;
            gap: 40px;
            max-width: 1200px;
            margin: 0 auto;
        }
        .footer .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 1.25rem;
            font-weight: 700;
            color: #f1f5f9;
            margin-bottom: 12px;
        }
        .footer .footer-logo .logo-icon {
            width: 34px;
            height: 34px;
            background: var(--primary-light);
            color: #fff;
            border-radius: 8px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            font-weight: 700;
        }
        .footer .footer-brand p { font-size: 0.9rem; line-height: 1.7; color: #94a3b8; max-width: 320px; }
        .footer .footer-col h4 { color: #f1f5f9; font-size: 0.95rem; font-weight: 600; margin-bottom: 16px; }
        .footer .footer-col ul { list-style: none; display: flex; flex-direction: column; gap: 10px; }
        .footer .footer-col ul li { font-size: 0.88rem; color: #94a3b8; }
        .footer .footer-col ul li a { color: #94a3b8; }
        .footer .footer-col ul li a:hover { color: #f1f5f9; }
        .footer .footer-bottom {
            max-width: 1200px;
            margin: 32px auto 0;
            padding-top: 24px;
            border-top: 1px solid #1e293b;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: 0.85rem;
            color: #64748b;
        }

        /* ===== 响应式 ===== */
        .mobile-menu-toggle { display: none; background: none; border: none; font-size: 1.5rem; color: var(--primary); cursor: pointer; padding: 8px; }
        @media (max-width: 1024px) {
            .sidebar { width: 200px; }
            .main-content { margin-left: 200px; }
            .footer .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
        }
        @media (max-width: 768px) {
            body { flex-direction: column; }
            .sidebar {
                position: relative;
                width: 100%;
                height: auto;
                border-right: none;
                border-bottom: 1px solid var(--border-color);
                flex-direction: row;
                align-items: center;
                padding: 0 16px;
                overflow: visible;
            }
            .sidebar-logo { border-bottom: none; padding: 12px 0; flex-shrink: 0; }
            .sidebar-nav {
                display: none;
                position: absolute;
                top: 100%;
                left: 0;
                right: 0;
                background: #fff;
                border-bottom: 1px solid var(--border-color);
                box-shadow: 0 8px 30px rgba(0,0,0,0.08);
                padding: 12px;
                flex-direction: column;
                gap: 2px;
                z-index: 999;
            }
            .sidebar-nav.open { display: flex; }
            .sidebar-nav .nav-label { display: none; }
            .mobile-menu-toggle { display: block; margin-left: auto; }
            .main-content { margin-left: 0; }
            .footer .footer-grid { grid-template-columns: 1fr; gap: 28px; }
            .footer .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
        }
        @media (max-width: 520px) {
            .container-custom { padding: 0 16px; }
            .sidebar-logo { font-size: 1.05rem; }
            .sidebar-logo .logo-icon { width: 30px; height: 30px; font-size: 0.9rem; }
        }

        /* ===== 补充工具 ===== */
        .badge-pill {
            display: inline-block;
            padding: 4px 14px;
            border-radius: 50px;
            font-size: 0.78rem;
            font-weight: 600;
            letter-spacing: 0.02em;
        }
        .card-shadow { box-shadow: var(--shadow); transition: var(--transition); }
        .card-shadow:hover { box-shadow: var(--shadow-hover); transform: translateY(-4px); }
        .btn-primary {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            background: var(--primary);
            color: #fff;
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.95rem;
            transition: var(--transition);
            border: none;
            cursor: pointer;
        }
        .btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 24px rgba(30,64,175,0.3); }
        .btn-outline {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 10px 24px;
            border: 2px solid var(--primary);
            color: var(--primary);
            border-radius: 50px;
            font-weight: 600;
            font-size: 0.9rem;
            background: transparent;
            transition: var(--transition);
            cursor: pointer;
        }
        .btn-outline:hover { background: var(--primary); color: #fff; transform: translateY(-2px); }
        .section-title { font-size: 2rem; font-weight: 700; color: var(--text-dark); letter-spacing: -0.02em; }
        .section-subtitle { font-size: 1.05rem; color: var(--text-light); max-width: 640px; line-height: 1.7; }
        .bg-band-light { background: var(--bg-light); }
        .bg-band-primary { background: var(--primary-bg); }
        .text-gradient { background: linear-gradient(135deg, var(--primary), var(--primary-light)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
        .step-connector { position: relative; }
        .step-connector::after {
            content: '';
            position: absolute;
            top: 28px;
            left: 50%;
            width: 2px;
            height: calc(100% - 28px);
            background: var(--border-color);
            transform: translateX(-50%);
        }
        .step-connector:last-child::after { display: none; }
        @media (max-width: 640px) {
            .section-title { font-size: 1.6rem; }
            .step-connector::after { display: none; }
        }

/* roulang page: category2 */
:root {
            --primary: #1e40af;
            --primary-light: #3b82f6;
            --primary-dark: #1e3a8a;
            --secondary: #0f172a;
            --accent: #f59e0b;
            --bg-light: #f8fafc;
            --bg-card: #ffffff;
            --text-primary: #0f172a;
            --text-secondary: #475569;
            --text-muted: #94a3b8;
            --border-light: #e2e8f0;
            --radius: 16px;
            --radius-sm: 10px;
            --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.06);
            --shadow-hover: 0 12px 40px rgba(0, 0, 0, 0.10);
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

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

        body {
            font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            background: var(--bg-light);
            color: var(--text-primary);
            line-height: 1.6;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        /* ===== 左侧导航 ===== */
        .sidebar {
            position: fixed;
            top: 0;
            left: 0;
            width: 260px;
            height: 100vh;
            background: var(--bg-card);
            border-right: 1px solid var(--border-light);
            display: flex;
            flex-direction: column;
            z-index: 1000;
            transition: transform var(--transition), box-shadow var(--transition);
            box-shadow: 2px 0 20px rgba(0, 0, 0, 0.04);
        }

        .sidebar-brand {
            padding: 28px 24px 20px;
            border-bottom: 1px solid var(--border-light);
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .sidebar-brand .logo-icon {
            width: 40px;
            height: 40px;
            background: var(--primary);
            color: #fff;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 700;
            flex-shrink: 0;
        }

        .sidebar-brand .logo-text {
            font-size: 20px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: -0.3px;
        }

        .sidebar-brand .logo-text span {
            color: var(--primary);
        }

        .sidebar-nav {
            flex: 1;
            padding: 20px 16px;
            display: flex;
            flex-direction: column;
            gap: 4px;
            overflow-y: auto;
        }

        .nav-label {
            font-size: 12px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 0.8px;
            color: var(--text-muted);
            padding: 8px 12px 6px;
        }

        .nav-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 16px;
            border-radius: var(--radius-sm);
            color: var(--text-secondary);
            font-size: 15px;
            font-weight: 500;
            text-decoration: none;
            transition: background var(--transition), color var(--transition), transform var(--transition);
            position: relative;
        }

        .nav-item .nav-icon {
            font-size: 18px;
            width: 24px;
            text-align: center;
            flex-shrink: 0;
        }

        .nav-item:hover {
            background: #f1f5f9;
            color: var(--primary);
            transform: translateX(4px);
        }

        .nav-item.active {
            background: #eff6ff;
            color: var(--primary);
            font-weight: 600;
            box-shadow: inset 3px 0 0 var(--primary);
        }

        .nav-item.active::before {
            content: '';
            position: absolute;
            left: 0;
            top: 50%;
            transform: translateY(-50%);
            width: 3px;
            height: 28px;
            background: var(--primary);
            border-radius: 0 4px 4px 0;
        }

        /* ===== 主内容区 ===== */
        .main-wrapper {
            margin-left: 260px;
            flex: 1;
            display: flex;
            flex-direction: column;
            min-height: 100vh;
        }

        .main-content {
            flex: 1;
            padding: 0;
        }

        /* ===== 移动端汉堡 ===== */
        .mobile-toggle {
            display: none;
            position: fixed;
            top: 16px;
            left: 16px;
            z-index: 1100;
            background: var(--bg-card);
            border: 1px solid var(--border-light);
            border-radius: 10px;
            width: 44px;
            height: 44px;
            align-items: center;
            justify-content: center;
            font-size: 22px;
            color: var(--text-primary);
            cursor: pointer;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
            transition: background var(--transition);
        }

        .mobile-toggle:hover {
            background: #f1f5f9;
        }

        .sidebar-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.35);
            z-index: 999;
            backdrop-filter: blur(4px);
        }

        /* ===== Banner ===== */
        .page-banner {
            position: relative;
            padding: 80px 48px 72px;
            background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 60%, #1e40af 100%);
            overflow: hidden;
            min-height: 280px;
            display: flex;
            align-items: center;
        }

        .page-banner::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
            opacity: 0.12;
            mix-blend-mode: overlay;
        }

        .page-banner::after {
            content: '';
            position: absolute;
            inset: 0;
            background: radial-gradient(ellipse at 80% 20%, rgba(59, 130, 246, 0.15), transparent 70%);
        }

        .banner-content {
            position: relative;
            z-index: 2;
            max-width: 800px;
            margin: 0 auto;
            text-align: center;
            width: 100%;
        }

        .banner-content h1 {
            font-size: 42px;
            font-weight: 800;
            color: #fff;
            letter-spacing: -0.5px;
            margin-bottom: 16px;
            line-height: 1.2;
        }

        .banner-content h1 span {
            color: #fcd34d;
        }

        .banner-content p {
            font-size: 18px;
            color: rgba(255, 255, 255, 0.85);
            max-width: 600px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }

        .banner-search {
            max-width: 520px;
            margin: 0 auto;
            display: flex;
            gap: 0;
            background: rgba(255, 255, 255, 0.12);
            border-radius: 50px;
            padding: 4px;
            backdrop-filter: blur(8px);
            border: 1px solid rgba(255, 255, 255, 0.15);
        }

        .banner-search input {
            flex: 1;
            border: none;
            background: transparent;
            padding: 14px 20px;
            font-size: 15px;
            color: #fff;
            outline: none;
            border-radius: 50px 0 0 50px;
        }

        .banner-search input::placeholder {
            color: rgba(255, 255, 255, 0.6);
        }

        .banner-search button {
            background: var(--accent);
            border: none;
            padding: 14px 28px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 15px;
            color: #0f172a;
            cursor: pointer;
            transition: background var(--transition), transform var(--transition);
            white-space: nowrap;
        }

        .banner-search button:hover {
            background: #fbbf24;
            transform: scale(1.03);
        }

        /* ===== 板块通用 ===== */
        .section-padding {
            padding: 72px 48px;
        }

        .section-title {
            font-size: 32px;
            font-weight: 700;
            color: var(--text-primary);
            letter-spacing: -0.3px;
            margin-bottom: 12px;
            line-height: 1.25;
        }

        .section-subtitle {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 600px;
            margin-bottom: 40px;
            line-height: 1.7;
        }

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

        .mx-auto {
            margin-left: auto;
            margin-right: auto;
        }

        /* ===== 服务分类卡片 ===== */
        .service-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .service-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 24px;
            text-align: center;
            box-shadow: var(--shadow-card);
            transition: transform var(--transition), box-shadow var(--transition);
            border: 1px solid var(--border-light);
            cursor: default;
        }

        .service-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-hover);
            border-color: var(--primary-light);
        }

        .service-card .icon-wrap {
            width: 64px;
            height: 64px;
            background: #eff6ff;
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 18px;
            font-size: 28px;
            color: var(--primary);
            transition: background var(--transition), transform var(--transition);
        }

        .service-card:hover .icon-wrap {
            background: var(--primary);
            color: #fff;
            transform: scale(1.05) rotate(-4deg);
        }

        .service-card h3 {
            font-size: 18px;
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text-primary);
        }

        .service-card p {
            font-size: 14px;
            color: var(--text-secondary);
            line-height: 1.6;
            margin-bottom: 16px;
        }

        .service-card .tag {
            display: inline-block;
            background: #f1f5f9;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 500;
            color: var(--text-secondary);
        }

        /* ===== 热门问题 FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-sm);
            border: 1px solid var(--border-light);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }

        .faq-item:hover {
            box-shadow: var(--shadow-card);
        }

        .faq-question {
            padding: 18px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            font-weight: 600;
            font-size: 16px;
            color: var(--text-primary);
            gap: 16px;
            user-select: none;
            transition: color var(--transition);
        }

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

        .faq-question .faq-icon {
            flex-shrink: 0;
            width: 24px;
            height: 24px;
            background: #f1f5f9;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 14px;
            color: var(--text-secondary);
            transition: transform var(--transition), background var(--transition), color var(--transition);
        }

        .faq-item.open .faq-icon {
            transform: rotate(180deg);
            background: var(--primary);
            color: #fff;
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.35s ease;
            padding: 0 24px;
            color: var(--text-secondary);
            font-size: 15px;
            line-height: 1.7;
        }

        .faq-item.open .faq-answer {
            max-height: 300px;
            padding: 0 24px 20px;
        }

        /* ===== 服务流程 ===== */
        .process-steps {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            position: relative;
        }

        .process-step {
            text-align: center;
            position: relative;
        }

        .process-step .step-number {
            width: 48px;
            height: 48px;
            background: var(--primary);
            color: #fff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 20px;
            font-weight: 700;
            margin: 0 auto 16px;
            position: relative;
            z-index: 2;
        }

        .process-step h4 {
            font-size: 17px;
            font-weight: 600;
            margin-bottom: 6px;
            color: var(--text-primary);
        }

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

        .process-step::after {
            content: '';
            position: absolute;
            top: 24px;
            left: calc(50% + 36px);
            width: calc(100% - 72px);
            height: 2px;
            background: #e2e8f0;
            z-index: 1;
        }

        .process-step:last-child::after {
            display: none;
        }

        /* ===== CTA 区块 ===== */
        .cta-block {
            background: linear-gradient(135deg, #1e3a8a 0%, #0f172a 100%);
            border-radius: var(--radius);
            padding: 56px 48px;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .cta-block::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
            opacity: 0.08;
            mix-blend-mode: overlay;
        }

        .cta-block h2 {
            font-size: 30px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 12px;
            position: relative;
            z-index: 2;
        }

        .cta-block p {
            font-size: 16px;
            color: rgba(255, 255, 255, 0.8);
            max-width: 560px;
            margin: 0 auto 28px;
            position: relative;
            z-index: 2;
        }

        .cta-block .btn-group {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
            position: relative;
            z-index: 2;
        }

        .btn-primary {
            background: var(--accent);
            color: #0f172a;
            padding: 14px 36px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 15px;
            border: none;
            cursor: pointer;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
        }

        .btn-primary:hover {
            background: #fbbf24;
            transform: translateY(-2px);
            box-shadow: 0 8px 24px rgba(245, 158, 11, 0.30);
        }

        .btn-outline-light {
            background: transparent;
            color: #fff;
            padding: 14px 36px;
            border-radius: 50px;
            font-weight: 600;
            font-size: 15px;
            border: 2px solid rgba(255, 255, 255, 0.35);
            cursor: pointer;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: background var(--transition), border-color var(--transition), transform var(--transition);
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, 0.10);
            border-color: #fff;
            transform: translateY(-2px);
        }

        /* ===== 数据统计 ===== */
        .stats-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .stat-card {
            background: var(--bg-card);
            border-radius: var(--radius);
            padding: 32px 20px;
            text-align: center;
            border: 1px solid var(--border-light);
            box-shadow: var(--shadow-card);
            transition: transform var(--transition), box-shadow var(--transition);
        }

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

        .stat-card .stat-number {
            font-size: 36px;
            font-weight: 800;
            color: var(--primary);
            line-height: 1.2;
            margin-bottom: 6px;
        }

        .stat-card .stat-label {
            font-size: 15px;
            color: var(--text-secondary);
            font-weight: 500;
        }

        /* ===== 图文帮助区块 ===== */
        .help-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 32px;
            align-items: center;
        }

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

        .help-image img {
            width: 100%;
            height: auto;
            display: block;
            transition: transform 0.5s ease;
        }

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

        .help-content h3 {
            font-size: 26px;
            font-weight: 700;
            margin-bottom: 16px;
            color: var(--text-primary);
        }

        .help-content ul {
            list-style: none;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .help-content ul li {
            display: flex;
            align-items: flex-start;
            gap: 12px;
            font-size: 15px;
            color: var(--text-secondary);
            line-height: 1.6;
        }

        .help-content ul li i {
            color: var(--primary);
            font-size: 18px;
            margin-top: 2px;
            flex-shrink: 0;
        }

        /* ===== 页脚 ===== */
        .footer {
            background: #0f172a;
            color: rgba(255, 255, 255, 0.85);
            padding: 48px 48px 32px;
            margin-top: auto;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            margin-bottom: 36px;
        }

        .footer-brand .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 20px;
            font-weight: 700;
            color: #fff;
            margin-bottom: 14px;
        }

        .footer-brand .footer-logo .logo-icon {
            width: 36px;
            height: 36px;
            background: var(--primary-light);
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 700;
            color: #fff;
        }

        .footer-brand p {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            line-height: 1.7;
            max-width: 320px;
        }

        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-col ul {
            list-style: none;
            padding: 0;
            display: flex;
            flex-direction: column;
            gap: 10px;
        }

        .footer-col ul li a,
        .footer-col ul li span {
            font-size: 14px;
            color: rgba(255, 255, 255, 0.65);
            text-decoration: none;
            transition: color var(--transition);
        }

        .footer-col ul li a:hover {
            color: var(--accent);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.08);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            color: rgba(255, 255, 255, 0.45);
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .service-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .process-steps {
                grid-template-columns: repeat(2, 1fr);
                gap: 32px;
            }
            .process-step::after {
                display: none;
            }
            .stats-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
                gap: 32px;
            }
            .section-padding {
                padding: 56px 32px;
            }
            .page-banner {
                padding: 60px 32px 56px;
            }
            .banner-content h1 {
                font-size: 34px;
            }
        }

        @media (max-width: 768px) {
            .sidebar {
                transform: translateX(-100%);
                box-shadow: none;
            }
            .sidebar.open {
                transform: translateX(0);
                box-shadow: 4px 0 40px rgba(0, 0, 0, 0.15);
            }
            .sidebar-overlay.active {
                display: block;
            }
            .mobile-toggle {
                display: flex;
            }
            .main-wrapper {
                margin-left: 0;
            }
            .section-padding {
                padding: 44px 20px;
            }
            .page-banner {
                padding: 56px 20px 48px;
                min-height: auto;
            }
            .banner-content h1 {
                font-size: 28px;
            }
            .banner-content p {
                font-size: 16px;
            }
            .banner-search {
                flex-direction: column;
                background: transparent;
                border: none;
                padding: 0;
                gap: 12px;
                border-radius: 0;
            }
            .banner-search input {
                background: rgba(255, 255, 255, 0.12);
                border-radius: 50px;
                border: 1px solid rgba(255, 255, 255, 0.15);
                padding: 12px 18px;
            }
            .banner-search button {
                width: 100%;
                border-radius: 50px;
                padding: 12px 18px;
            }
            .service-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .service-card {
                padding: 24px 16px;
            }
            .service-card .icon-wrap {
                width: 52px;
                height: 52px;
                font-size: 22px;
            }
            .help-grid {
                grid-template-columns: 1fr;
                gap: 24px;
            }
            .help-image {
                order: -1;
            }
            .process-steps {
                grid-template-columns: 1fr 1fr;
                gap: 24px;
            }
            .stats-grid {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
            }
            .stat-card .stat-number {
                font-size: 28px;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer {
                padding: 36px 20px 24px;
            }
            .cta-block {
                padding: 36px 24px;
            }
            .cta-block h2 {
                font-size: 24px;
            }
            .section-title {
                font-size: 26px;
            }
            .faq-question {
                padding: 14px 18px;
                font-size: 15px;
            }
            .faq-answer {
                font-size: 14px;
            }
            .faq-item.open .faq-answer {
                padding: 0 18px 16px;
            }
        }

        @media (max-width: 520px) {
            .service-grid {
                grid-template-columns: 1fr;
            }
            .process-steps {
                grid-template-columns: 1fr;
            }
            .stats-grid {
                grid-template-columns: 1fr;
            }
            .banner-content h1 {
                font-size: 24px;
            }
            .section-title {
                font-size: 22px;
            }
            .page-banner {
                padding: 44px 16px 36px;
            }
            .section-padding {
                padding: 32px 16px;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: center;
                text-align: center;
            }
        }

/* roulang page: category3 */
/* ===== 设计变量 ===== */
        :root {
            --color-primary: #1a365d;
            --color-primary-light: #2b6cb0;
            --color-primary-dark: #0f2440;
            --color-secondary: #0ea5e9;
            --color-accent: #10b981;
            --color-bg: #f0f5ff;
            --color-bg-alt: #e6edf7;
            --color-text: #1e293b;
            --color-text-weak: #64748b;
            --color-border: #d1d9e6;
            --color-white: #ffffff;
            --radius-sm: 6px;
            --radius-md: 12px;
            --radius-lg: 20px;
            --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
            --space-sm: 8px;
            --space-md: 16px;
            --space-lg: 32px;
            --space-xl: 64px;
            --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, 'Noto Sans SC', sans-serif;
            --sidebar-width: 240px;
            --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
        }

        /* ===== Reset / Base ===== */
        *,
        *::before,
        *::after {
            box-sizing: border-box;
            margin: 0;
            padding: 0;
        }
        html {
            font-size: 16px;
            scroll-behavior: smooth;
        }
        body {
            font-family: var(--font-sans);
            color: var(--color-text);
            background: var(--color-bg);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }
        a {
            color: inherit;
            text-decoration: none;
            transition: color var(--transition);
        }
        img {
            max-width: 100%;
            height: auto;
            display: block;
        }
        button,
        input,
        textarea {
            font-family: inherit;
            font-size: inherit;
        }
        ul {
            list-style: none;
        }

        /* ===== 布局容器 ===== */
        .app-wrapper {
            display: flex;
            min-height: 100vh;
        }

        /* ===== 左侧导航 ===== */
        .sidebar {
            width: var(--sidebar-width);
            flex-shrink: 0;
            background: var(--color-white);
            border-right: 1px solid var(--color-border);
            display: flex;
            flex-direction: column;
            position: fixed;
            top: 0;
            left: 0;
            height: 100vh;
            z-index: 100;
            transition: transform var(--transition);
        }
        .sidebar-brand {
            padding: 20px 18px 16px;
            border-bottom: 1px solid var(--color-border);
            display: flex;
            align-items: center;
            gap: 10px;
        }
        .logo-icon {
            width: 36px;
            height: 36px;
            background: var(--color-primary);
            color: var(--color-white);
            border-radius: var(--radius-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 18px;
            font-weight: 700;
            flex-shrink: 0;
        }
        .logo-text {
            font-size: 17px;
            font-weight: 700;
            color: var(--color-primary);
            letter-spacing: 0.5px;
            line-height: 1.3;
        }
        .sidebar-nav {
            flex: 1;
            padding: 16px 12px;
            overflow-y: auto;
        }
        .nav-label {
            font-size: 11px;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: 1px;
            color: var(--color-text-weak);
            padding: 0 8px 10px;
        }
        .nav-item {
            display: flex;
            align-items: center;
            gap: 10px;
            padding: 10px 12px;
            border-radius: var(--radius-sm);
            font-size: 15px;
            font-weight: 500;
            color: var(--color-text);
            transition: background var(--transition), color var(--transition);
            margin-bottom: 2px;
        }
        .nav-item .nav-icon {
            font-size: 18px;
            width: 24px;
            text-align: center;
            flex-shrink: 0;
        }
        .nav-item:hover {
            background: var(--color-bg-alt);
            color: var(--color-primary-light);
        }
        .nav-item.active {
            background: var(--color-primary);
            color: var(--color-white);
            box-shadow: var(--shadow-sm);
        }
        .nav-item.active:hover {
            background: var(--color-primary-light);
            color: var(--color-white);
        }
        .sidebar-footer {
            padding: 14px 18px;
            border-top: 1px solid var(--color-border);
            font-size: 12px;
            color: var(--color-text-weak);
            text-align: center;
        }

        /* ===== 右侧主内容 ===== */
        .main-content {
            margin-left: var(--sidebar-width);
            flex: 1;
            min-width: 0;
            display: flex;
            flex-direction: column;
        }

        /* ===== 移动端顶部导航 ===== */
        .mobile-header {
            display: none;
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            height: 60px;
            background: var(--color-white);
            border-bottom: 1px solid var(--color-border);
            z-index: 110;
            padding: 0 16px;
            align-items: center;
            justify-content: space-between;
            box-shadow: var(--shadow-sm);
        }
        .mobile-header .logo-text {
            font-size: 16px;
        }
        .hamburger {
            width: 40px;
            height: 40px;
            border: none;
            background: transparent;
            cursor: pointer;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 5px;
            border-radius: var(--radius-sm);
            transition: background var(--transition);
        }
        .hamburger:hover {
            background: var(--color-bg-alt);
        }
        .hamburger span {
            display: block;
            width: 22px;
            height: 2px;
            background: var(--color-text);
            border-radius: 2px;
            transition: transform var(--transition), opacity var(--transition);
        }
        .hamburger.active span:nth-child(1) {
            transform: translateY(7px) rotate(45deg);
        }
        .hamburger.active span:nth-child(2) {
            opacity: 0;
        }
        .hamburger.active span:nth-child(3) {
            transform: translateY(-7px) rotate(-45deg);
        }

        /* 移动端遮罩 */
        .sidebar-overlay {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, 0.4);
            z-index: 99;
            backdrop-filter: blur(4px);
            -webkit-backdrop-filter: blur(4px);
        }
        .sidebar-overlay.open {
            display: block;
        }

        /* ===== 通用板块 ===== */
        .section {
            padding: var(--space-xl) 0;
        }
        .section-alt {
            background: var(--color-bg-alt);
        }
        .section-white {
            background: var(--color-white);
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 24px;
        }
        .section-title {
            font-size: 32px;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 12px;
            line-height: 1.3;
        }
        .section-subtitle {
            font-size: 17px;
            color: var(--color-text-weak);
            max-width: 640px;
            margin-bottom: 40px;
            line-height: 1.7;
        }
        .text-center {
            text-align: center;
        }
        .mx-auto {
            margin-left: auto;
            margin-right: auto;
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 12px 28px;
            border-radius: var(--radius-sm);
            font-weight: 600;
            font-size: 15px;
            border: none;
            cursor: pointer;
            transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
        }
        .btn-primary {
            background: var(--color-primary);
            color: var(--color-white);
        }
        .btn-primary:hover {
            background: var(--color-primary-light);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        .btn-secondary {
            background: var(--color-white);
            color: var(--color-primary);
            border: 2px solid var(--color-primary);
        }
        .btn-secondary:hover {
            background: var(--color-primary);
            color: var(--color-white);
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        .btn-accent {
            background: var(--color-accent);
            color: var(--color-white);
        }
        .btn-accent:hover {
            background: #059669;
            transform: translateY(-2px);
            box-shadow: var(--shadow-md);
        }
        .btn:focus-visible {
            outline: 3px solid var(--color-secondary);
            outline-offset: 2px;
        }

        /* ===== 卡片 ===== */
        .card {
            background: var(--color-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border);
            overflow: hidden;
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        .card-img {
            width: 100%;
            aspect-ratio: 16 / 9;
            object-fit: cover;
            display: block;
        }
        .card-body {
            padding: 20px 22px 24px;
        }
        .card-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 8px;
        }
        .card-text {
            font-size: 14px;
            color: var(--color-text-weak);
            line-height: 1.7;
        }
        .card-tag {
            display: inline-block;
            padding: 2px 12px;
            border-radius: 20px;
            font-size: 12px;
            font-weight: 500;
            background: var(--color-bg-alt);
            color: var(--color-primary-light);
            margin-bottom: 10px;
        }

        /* ===== 统计数字 ===== */
        .stat-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }
        .stat-item {
            text-align: center;
            padding: 28px 16px;
            background: var(--color-white);
            border-radius: var(--radius-md);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border);
        }
        .stat-number {
            font-size: 40px;
            font-weight: 800;
            color: var(--color-primary);
            line-height: 1.2;
        }
        .stat-number .suffix {
            font-size: 20px;
            font-weight: 600;
            color: var(--color-primary-light);
        }
        .stat-label {
            font-size: 15px;
            color: var(--color-text-weak);
            margin-top: 6px;
        }

        /* ===== 步骤流程 ===== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            counter-reset: step;
        }
        .step-item {
            background: var(--color-white);
            border-radius: var(--radius-md);
            padding: 28px 22px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border);
            position: relative;
            counter-increment: step;
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .step-item:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        .step-item::before {
            content: counter(step);
            position: absolute;
            top: 16px;
            right: 20px;
            font-size: 48px;
            font-weight: 800;
            color: var(--color-bg-alt);
            line-height: 1;
            font-family: var(--font-sans);
        }
        .step-icon {
            font-size: 32px;
            margin-bottom: 12px;
            display: block;
        }
        .step-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 8px;
        }
        .step-desc {
            font-size: 14px;
            color: var(--color-text-weak);
            line-height: 1.7;
        }

        /* ===== FAQ ===== */
        .faq-list {
            max-width: 800px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .faq-item {
            background: var(--color-white);
            border-radius: var(--radius-sm);
            border: 1px solid var(--color-border);
            overflow: hidden;
            transition: box-shadow var(--transition);
        }
        .faq-item:hover {
            box-shadow: var(--shadow-sm);
        }
        .faq-question {
            padding: 18px 22px;
            font-size: 16px;
            font-weight: 600;
            color: var(--color-primary);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            gap: 12px;
            user-select: none;
            transition: background var(--transition);
        }
        .faq-question:hover {
            background: var(--color-bg-alt);
        }
        .faq-question .faq-toggle {
            font-size: 20px;
            color: var(--color-text-weak);
            transition: transform var(--transition);
            flex-shrink: 0;
        }
        .faq-item.open .faq-question .faq-toggle {
            transform: rotate(45deg);
        }
        .faq-answer {
            padding: 0 22px 18px;
            font-size: 15px;
            color: var(--color-text-weak);
            line-height: 1.7;
            display: none;
        }
        .faq-item.open .faq-answer {
            display: block;
        }

        /* ===== Hero / Banner ===== */
        .hero {
            position: relative;
            padding: 80px 0;
            background: var(--color-primary-dark);
            overflow: hidden;
            min-height: 360px;
            display: flex;
            align-items: center;
        }
        .hero-bg {
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: 0.2;
            pointer-events: none;
        }
        .hero-content {
            position: relative;
            z-index: 2;
            color: var(--color-white);
        }
        .hero-title {
            font-size: 44px;
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 16px;
            letter-spacing: -0.5px;
        }
        .hero-desc {
            font-size: 18px;
            opacity: 0.9;
            max-width: 580px;
            line-height: 1.7;
            margin-bottom: 28px;
        }
        .hero-badge {
            display: inline-block;
            padding: 4px 16px;
            border-radius: 20px;
            font-size: 13px;
            font-weight: 600;
            background: rgba(255, 255, 255, 0.15);
            color: var(--color-white);
            margin-bottom: 16px;
            letter-spacing: 0.5px;
        }

        /* ===== 功能网格 ===== */
        .feature-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }
        .feature-card {
            background: var(--color-white);
            border-radius: var(--radius-md);
            padding: 28px 22px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--color-border);
            transition: transform var(--transition), box-shadow var(--transition);
        }
        .feature-card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
        }
        .feature-icon {
            font-size: 36px;
            margin-bottom: 14px;
            display: block;
        }
        .feature-title {
            font-size: 18px;
            font-weight: 700;
            color: var(--color-primary);
            margin-bottom: 8px;
        }
        .feature-desc {
            font-size: 14px;
            color: var(--color-text-weak);
            line-height: 1.7;
        }

        /* ===== 三列卡片网格 ===== */
        .grid-3 {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 24px;
        }

        /* ===== CTA ===== */
        .cta-section {
            background: var(--color-primary);
            padding: 64px 0;
            text-align: center;
            color: var(--color-white);
        }
        .cta-title {
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 12px;
        }
        .cta-desc {
            font-size: 17px;
            opacity: 0.9;
            max-width: 560px;
            margin: 0 auto 28px;
            line-height: 1.7;
        }
        .cta-buttons {
            display: flex;
            gap: 16px;
            justify-content: center;
            flex-wrap: wrap;
        }
        .cta-buttons .btn {
            background: var(--color-white);
            color: var(--color-primary);
        }
        .cta-buttons .btn:hover {
            background: var(--color-bg-alt);
            color: var(--color-primary-dark);
        }
        .cta-buttons .btn-outline {
            background: transparent;
            color: var(--color-white);
            border: 2px solid rgba(255, 255, 255, 0.6);
        }
        .cta-buttons .btn-outline:hover {
            background: rgba(255, 255, 255, 0.12);
            border-color: var(--color-white);
        }

        /* ===== 页脚 ===== */
        .footer {
            background: var(--color-primary-dark);
            color: rgba(255, 255, 255, 0.85);
            padding: 48px 0 32px;
            flex-shrink: 0;
        }
        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1.2fr;
            gap: 40px;
            margin-bottom: 36px;
        }
        .footer-logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 18px;
            font-weight: 700;
            color: var(--color-white);
            margin-bottom: 12px;
        }
        .footer-logo .logo-icon {
            background: var(--color-secondary);
        }
        .footer-brand p {
            font-size: 14px;
            opacity: 0.75;
            line-height: 1.7;
            max-width: 320px;
        }
        .footer-col h4 {
            font-size: 15px;
            font-weight: 600;
            color: var(--color-white);
            margin-bottom: 14px;
        }
        .footer-col ul li {
            margin-bottom: 8px;
            font-size: 14px;
            opacity: 0.75;
            transition: opacity var(--transition);
        }
        .footer-col ul li:hover {
            opacity: 1;
        }
        .footer-col ul li a {
            color: inherit;
        }
        .footer-col ul li a:hover {
            color: var(--color-secondary);
        }
        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, 0.1);
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 12px;
            font-size: 13px;
            opacity: 0.6;
        }
        .footer-bottom a {
            color: inherit;
        }
        .footer-bottom a:hover {
            color: var(--color-secondary);
            opacity: 1;
        }

        /* ===== 响应式 ===== */
        @media (max-width: 1024px) {
            .stat-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .feature-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .grid-3 {
                grid-template-columns: repeat(2, 1fr);
            }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .hero-title {
                font-size: 36px;
            }
            .section-title {
                font-size: 28px;
            }
        }

        @media (max-width: 768px) {
            .sidebar {
                transform: translateX(-100%);
            }
            .sidebar.open {
                transform: translateX(0);
            }
            .mobile-header {
                display: flex;
            }
            .main-content {
                margin-left: 0;
                padding-top: 60px;
            }
            .hero {
                padding: 60px 0;
                min-height: 300px;
            }
            .hero-title {
                font-size: 30px;
            }
            .hero-desc {
                font-size: 16px;
            }
            .section {
                padding: 48px 0;
            }
            .stat-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 16px;
            }
            .stat-number {
                font-size: 32px;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .feature-grid {
                grid-template-columns: 1fr;
            }
            .grid-3 {
                grid-template-columns: 1fr;
            }
            .footer-grid {
                grid-template-columns: 1fr;
                gap: 28px;
            }
            .footer-bottom {
                flex-direction: column;
                text-align: center;
            }
            .container {
                padding: 0 16px;
            }
            .section-title {
                font-size: 24px;
            }
            .section-subtitle {
                font-size: 15px;
            }
            .cta-title {
                font-size: 26px;
            }
            .sidebar-overlay.open {
                display: block;
            }
        }

        @media (max-width: 520px) {
            .hero-title {
                font-size: 24px;
            }
            .hero {
                padding: 40px 0;
                min-height: 240px;
            }
            .stat-grid {
                grid-template-columns: 1fr 1fr;
                gap: 12px;
            }
            .stat-item {
                padding: 20px 12px;
            }
            .stat-number {
                font-size: 28px;
            }
            .btn {
                padding: 10px 20px;
                font-size: 14px;
            }
            .card-body {
                padding: 16px;
            }
            .faq-question {
                padding: 14px 16px;
                font-size: 15px;
            }
            .faq-answer {
                padding: 0 16px 14px;
                font-size: 14px;
            }
            .container {
                padding: 0 12px;
            }
        }

        /* ===== 辅助 ===== */
        .gap-3 {
            gap: 12px;
        }
        .gap-4 {
            gap: 16px;
        }
        .gap-6 {
            gap: 24px;
        }
        .flex-wrap {
            flex-wrap: wrap;
        }
        .items-center {
            align-items: center;
        }
        .justify-center {
            justify-content: center;
        }
        .mt-4 {
            margin-top: 16px;
        }
        .mt-8 {
            margin-top: 32px;
        }
        .mb-4 {
            margin-bottom: 16px;
        }
        .mb-8 {
            margin-bottom: 32px;
        }
        .inline-flex {
            display: inline-flex;
        }
        .block {
            display: block;
        }
        .hidden {
            display: none;
        }
        .relative {
            position: relative;
        }
        .overflow-hidden {
            overflow: hidden;
        }
        .w-full {
            width: 100%;
        }
        .object-cover {
            object-fit: cover;
        }
        .rounded-lg {
            border-radius: var(--radius-md);
        }
        .shadow-md {
            box-shadow: var(--shadow-md);
        }