/* roulang page: index */
:root {
  --primary: #2563eb;
  --primary-light: #60a5fa;
  --primary-dark: #1e40af;
  --accent: #f59e0b;
  --bg-body: #f1f5f9;
  --bg-dark: #0f172a;
  --bg-card: #ffffff;
  --text-main: #1e293b;
  --text-muted: #64748b;
  --text-light: #94a3b8;
  --border: #e2e8f0;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.06);
  --shadow-md: 0 4px 16px rgba(15, 23, 42, 0.08);
  --shadow-lg: 0 12px 36px rgba(15, 23, 42, 0.12);
  --sidebar-w: 264px;
  --header-h: 64px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  background: var(--bg-body);
  color: var(--text-main);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

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

a {
  text-decoration: none;
  color: inherit;
}

ul, ol {
  list-style: none;
}

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

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

/* ===== 移动端顶部栏 ===== */
.mobile-header {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1100;
  height: var(--header-h);
  background: rgba(15, 23, 42, 0.98);
  backdrop-filter: blur(18px);
  border-bottom: 1px solid rgba(148, 163, 184, 0.15);
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
}

.mobile-header .brand-text {
  color: #fff;
  font-size: 1.05rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.mobile-header .burger-btn {
  width: 42px;
  height: 42px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #e2e8f0;
  font-size: 1.25rem;
  transition: background 0.2s;
}

.mobile-header .burger-btn:hover {
  background: rgba(148, 163, 184, 0.15);
}

.mobile-overlay {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 1050;
  background: rgba(2, 6, 23, 0.55);
  backdrop-filter: blur(4px);
}

.mobile-overlay.active {
  display: block;
}

/* ===== 侧边栏 ===== */
.app-shell {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: var(--sidebar-w);
  position: fixed;
  top: 0;
  left: 0;
  bottom: 0;
  z-index: 1000;
  background: linear-gradient(180deg, #0b1220 0%, #0f172a 40%, #131c33 100%);
  border-right: 1px solid rgba(148, 163, 184, 0.1);
  display: flex;
  flex-direction: column;
  padding: 28px 20px;
  overflow-y: auto;
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.sidebar-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 10px 24px;
  border-bottom: 1px solid rgba(148, 163, 184, 0.12);
  margin-bottom: 22px;
}

.brand-icon {
  width: 44px;
  height: 44px;
  border-radius: 13px;
  background: linear-gradient(135deg, #3b82f6 0%, #1d4ed8 60%, #1e3a8a 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 1.2rem;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.4);
  flex-shrink: 0;
}

.brand-text {
  color: #fff;
  font-size: 1.08rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.3;
}

.brand-text small {
  display: block;
  font-size: 0.72rem;
  font-weight: 400;
  color: #94a3b8;
  letter-spacing: 0.06em;
  margin-top: 2px;
}

.nav-section-label {
  color: #64748b;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  padding: 14px 12px 8px;
}

.nav-link {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 12px 14px;
  border-radius: 12px;
  color: #cbd5e1;
  font-size: 0.92rem;
  font-weight: 500;
  transition: all 0.22s;
  margin-bottom: 4px;
}

.nav-link i {
  width: 20px;
  text-align: center;
  font-size: 1rem;
  color: #64748b;
  transition: color 0.22s;
}

.nav-link:hover {
  background: rgba(148, 163, 184, 0.1);
  color: #fff;
}

.nav-link:hover i {
  color: #60a5fa;
}

.nav-link.active {
  background: linear-gradient(135deg, rgba(37, 99, 235, 0.25), rgba(37, 99, 235, 0.12));
  color: #fff;
  font-weight: 600;
  box-shadow: inset 0 0 0 1px rgba(59, 130, 246, 0.25);
}

.nav-link.active i {
  color: #60a5fa;
}

.sidebar-status {
  margin-top: auto;
  padding: 16px 14px 6px;
  border-radius: 14px;
  background: rgba(148, 163, 184, 0.06);
  border: 1px solid rgba(148, 163, 184, 0.08);
  display: flex;
  align-items: center;
  gap: 10px;
  color: #94a3b8;
  font-size: 0.82rem;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #22c55e;
  box-shadow: 0 0 0 3px rgba(34, 197, 94, 0.2);
  flex-shrink: 0;
}

/* ===== 主内容区 ===== */
.main-content {
  flex: 1;
  margin-left: var(--sidebar-w);
  min-width: 0;
}

/* ===== Hero ===== */
.hero {
  position: relative;
  padding: 96px 0 88px;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(2, 6, 23, 0.92) 0%, rgba(15, 23, 42, 0.78) 50%, rgba(30, 64, 175, 0.55) 100%);
  backdrop-filter: blur(2px);
}

.hero-content {
  position: relative;
  z-index: 2;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 18px;
  border-radius: 100px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: #e2e8f0;
  font-size: 0.85rem;
  font-weight: 500;
  backdrop-filter: blur(8px);
  margin-bottom: 24px;
}

.hero-badge i {
  color: #fbbf24;
}

.hero-title {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.2;
  color: #fff;
  letter-spacing: -0.01em;
  margin-bottom: 20px;
  max-width: 640px;
}

.hero-title span {
  color: transparent;
  background: linear-gradient(90deg, #60a5fa, #a78bfa);
  -webkit-background-clip: text;
  background-clip: text;
}

.hero-subtitle {
  color: rgba(226, 232, 240, 0.85);
  font-size: 1.05rem;
  max-width: 560px;
  line-height: 1.8;
  margin-bottom: 32px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-bottom: 42px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: 12px;
  font-size: 0.92rem;
  font-weight: 600;
  transition: all 0.22s;
  cursor: pointer;
}

.btn-primary {
  background: linear-gradient(135deg, #2563eb 0%, #1d4ed8 100%);
  color: #fff;
  box-shadow: 0 4px 18px rgba(37, 99, 235, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(37, 99, 235, 0.42);
}

.btn-outline {
  background: rgba(255, 255, 255, 0.08);
  color: #e2e8f0;
  border: 1px solid rgba(255, 255, 255, 0.25);
  backdrop-filter: blur(6px);
}

.btn-outline:hover {
  background: rgba(255, 255, 255, 0.16);
  border-color: rgba(255, 255, 255, 0.4);
  transform: translateY(-2px);
}

.btn-outline-light {
  background: transparent;
  color: #1e293b;
  border: 1.5px solid #cbd5e1;
}

.btn-outline-light:hover {
  border-color: #2563eb;
  color: #2563eb;
  background: rgba(37, 99, 235, 0.04);
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 16px;
  max-width: 640px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 32px;
}

.hs-item {
  text-align: center;
  padding: 10px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.05);
}

.hs-num {
  display: block;
  font-size: 1.8rem;
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
}

.hs-label {
  display: block;
  font-size: 0.78rem;
  color: rgba(226, 232, 240, 0.7);
  margin-top: 4px;
}

/* ===== 通用section ===== */
.section {
  padding: 80px 0;
}

.section-light {
  background: #fff;
}

.section-tint {
  background: #f8fafc;
}

.section-header {
  text-align: center;
  margin-bottom: 48px;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}

.section-tag {
  display: inline-block;
  padding: 6px 16px;
  border-radius: 100px;
  background: rgba(37, 99, 235, 0.08);
  color: #2563eb;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  margin-bottom: 14px;
  border: 1px solid rgba(37, 99, 235, 0.12);
}

.section-title {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.01em;
  line-height: 1.3;
}

.section-subtitle {
  color: var(--text-muted);
  font-size: 1rem;
  margin-top: 12px;
  line-height: 1.7;
}

/* ===== 平台概览卡片 ===== */
.overview-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 36px 30px;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: all 0.25s;
  height: 100%;
  position: relative;
  overflow: hidden;
}

.overview-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, #2563eb, #60a5fa);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s;
}

.overview-card:hover::after {
  transform: scaleX(1);
}

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

.overview-icon {
  width: 56px;
  height: 56px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  margin-bottom: 20px;
  color: #2563eb;
  background: rgba(37, 99, 235, 0.08);
  border: 1px solid rgba(37, 99, 235, 0.12);
}

.overview-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-main);
}

.overview-card p {
  color: var(--text-muted);
  font-size: 0.92rem;
  line-height: 1.7;
}

/* ===== 分类卡片 ===== */
.category-card {
  background: #fff;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: all 0.3s;
  display: block;
  height: 100%;
}

.category-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: rgba(37, 99, 235, 0.2);
}

.category-card .thumb {
  position: relative;
  overflow: hidden;
  height: 180px;
  background: var(--bg-dark);
}

.category-card .thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s;
}

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

.category-card .thumb::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(15, 23, 42, 0) 60%, rgba(15, 23, 42, 0.5) 100%);
}

.category-card .badge {
  position: absolute;
  top: 14px;
  left: 14px;
  z-index: 2;
  padding: 5px 12px;
  border-radius: 100px;
  background: rgba(255, 255, 255, 0.92);
  color: #1e293b;
  font-size: 0.75rem;
  font-weight: 600;
  backdrop-filter: blur(6px);
}

.category-card .body {
  padding: 22px 24px 26px;
  text-align: center;
}

.category-card .body h3 {
  font-size: 1.12rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-main);
}

.category-card .body p {
  color: var(--text-muted);
  font-size: 0.88rem;
  line-height: 1.7;
  margin-bottom: 14px;
}

.category-card .link {
  color: #2563eb;
  font-size: 0.86rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap 0.2s;
}

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

/* ===== 数据统计 ===== */
.stats-band {
  background: linear-gradient(120deg, #0f172a 0%, #1e293b 50%, #1e3a5f 100%);
  border-radius: var(--radius-lg);
  padding: 56px 40px;
  color: #fff;
  position: relative;
  overflow: hidden;
}

.stats-band::before {
  content: '';
  position: absolute;
  top: -40%;
  right: -10%;
  width: 260px;
  height: 260px;
  border-radius: 50%;
  background: rgba(59, 130, 246, 0.15);
  filter: blur(60px);
}

.stats-band::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: 10%;
  width: 180px;
  height: 180px;
  border-radius: 50%;
  background: rgba(245, 158, 11, 0.1);
  filter: blur(50px);
}

.stat-item {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 20px 10px;
}

.stat-number {
  font-size: 2.5rem;
  font-weight: 800;
  line-height: 1.2;
  background: linear-gradient(90deg, #fff, #bfdbfe);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  display: block;
}

.stat-label {
  font-size: 0.85rem;
  color: rgba(226, 232, 240, 0.6);
  margin-top: 6px;
  letter-spacing: 0.02em;
}

/* ===== 资讯列表 ===== */
.news-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.news-card {
  background: #fff;
  border-radius: 16px;
  padding: 24px 28px;
  border: 1px solid var(--border);
  display: flex;
  align-items: center;
  gap: 20px;
  transition: all 0.22s;
}

.news-card:hover {
  border-color: rgba(37, 99, 235, 0.3);
  box-shadow: var(--shadow-md);
  transform: translateX(4px);
}

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

.news-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 6px;
}

.news-category {
  display: inline-block;
  padding: 3px 12px;
  border-radius: 100px;
  background: rgba(37, 99, 235, 0.08);
  color: #2563eb;
  font-size: 0.72rem;
  font-weight: 600;
  border: 1px solid rgba(37, 99, 235, 0.1);
}

.news-time {
  color: var(--text-light);
  font-size: 0.78rem;
}

.news-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.news-excerpt {
  color: var(--text-muted);
  font-size: 0.87rem;
  line-height: 1.65;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.news-arrow {
  color: var(--text-light);
  font-size: 1.1rem;
  transition: all 0.2s;
  flex-shrink: 0;
}

.news-card:hover .news-arrow {
  color: #2563eb;
  transform: translateX(4px);
}

.news-empty {
  background: #fff;
  border-radius: 16px;
  padding: 40px;
  text-align: center;
  color: var(--text-muted);
  border: 1px dashed var(--border);
  font-size: 0.95rem;
}

/* ===== 功能特色 ===== */
.feature-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  margin-bottom: 56px;
}

.feature-row:last-child {
  margin-bottom: 0;
}

.feature-media {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
}

.feature-media::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.06);
}

.feature-media img {
  width: 100%;
  height: 300px;
  object-fit: cover;
}

.feature-content h3 {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 14px;
  color: var(--text-main);
}

.feature-content p {
  color: var(--text-muted);
  font-size: 0.94rem;
  line-height: 1.8;
  margin-bottom: 18px;
}

.feature-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.feature-list li {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  color: var(--text-main);
  font-size: 0.92rem;
}

.feature-list li i {
  color: #2563eb;
  margin-top: 4px;
  flex-shrink: 0;
  font-size: 0.9rem;
}

/* ===== 流程 ===== */
.process-step {
  position: relative;
  text-align: center;
  padding: 30px 18px;
  background: #fff;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  transition: all 0.25s;
  height: 100%;
}

.process-step:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  border-color: rgba(37, 99, 235, 0.2);
}

.step-num {
  width: 48px;
  height: 48px;
  margin: 0 auto 16px;
  border-radius: 50%;
  background: linear-gradient(135deg, #2563eb, #1e40af);
  color: #fff;
  font-size: 1.1rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
}

.process-step h4 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-main);
}

.process-step p {
  color: var(--text-muted);
  font-size: 0.88rem;
  line-height: 1.65;
}

.process-arrow {
  position: absolute;
  top: 50%;
  right: -22px;
  transform: translateY(-50%);
  color: #cbd5e1;
  font-size: 1rem;
  z-index: 3;
}

/* ===== FAQ ===== */
.faq-item {
  background: #fff;
  border-radius: 16px;
  border: 1px solid var(--border);
  margin-bottom: 14px;
  overflow: hidden;
  transition: all 0.2s;
}

.faq-item:hover {
  border-color: rgba(37, 99, 235, 0.2);
  box-shadow: var(--shadow-sm);
}

.faq-question {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 26px;
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--text-main);
  cursor: pointer;
  transition: color 0.2s;
}

.faq-question i {
  color: #94a3b8;
  transition: transform 0.3s;
  font-size: 0.85rem;
}

.faq-item.active .faq-question {
  color: #2563eb;
}

.faq-item.active .faq-question i {
  transform: rotate(180deg);
  color: #2563eb;
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}

.faq-answer-inner {
  padding: 0 26px 22px;
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.75;
  border-top: 1px solid transparent;
}

.faq-item.active .faq-answer-inner {
  border-top-color: var(--border);
  padding-top: 16px;
}

.faq-item.active .faq-answer {
  max-height: 300px;
}

/* ===== CTA ===== */
.cta-section {
  background: linear-gradient(120deg, #0f172a, #1e3a5f, #1e3a8a);
  background-size: 200% 200%;
  animation: gradientShift 12s ease infinite;
  border-radius: var(--radius-lg);
  padding: 64px 56px;
  text-align: center;
  color: #fff;
  position: relative;
  overflow: hidden;
}

@keyframes gradientShift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

.cta-section::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: rgba(59, 130, 246, 0.2);
  filter: blur(80px);
}

.cta-section::after {
  content: '';
  position: absolute;
  bottom: -40%;
  left: -10%;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: rgba(245, 158, 11, 0.12);
  filter: blur(60px);
}

.cta-section > * {
  position: relative;
  z-index: 2;
}

.cta-section h2 {
  font-size: 2rem;
  font-weight: 800;
  margin-bottom: 16px;
}

.cta-section p {
  color: rgba(226, 232, 240, 0.8);
  font-size: 1rem;
  max-width: 560px;
  margin: 0 auto 32px;
}

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

.footer-brand {
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}

.footer-desc {
  font-size: 0.88rem;
  line-height: 1.7;
  max-width: 360px;
}

.footer-link-title {
  font-size: 0.95rem;
  font-weight: 600;
  color: #fff;
  margin-bottom: 16px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.88rem;
  color: #94a3b8;
  transition: all 0.2s;
}

.footer-links a:hover {
  color: #fff;
  transform: translateX(3px);
}

.footer-bottom {
  border-top: 1px solid rgba(148, 163, 184, 0.1);
  margin-top: 40px;
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  font-size: 0.82rem;
  color: #64748b;
}

/* ===== 响应式 ===== */
@media (max-width: 1023px) {
  .sidebar {
    transform: translateX(-100%);
    box-shadow: 12px 0 40px rgba(2, 6, 23, 0.3);
    width: 280px;
  }

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

  .main-content {
    margin-left: 0;
  }

  .mobile-header {
    display: flex;
  }

  .main-content {
    padding-top: var(--header-h);
  }

  .hero {
    padding: 72px 0 64px;
  }

  .hero-title {
    font-size: 2.3rem;
  }

  .section {
    padding: 56px 0;
  }

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

  .feature-row:nth-child(even) .feature-media {
    order: -1;
  }

  .cta-section {
    padding: 48px 32px;
  }

  .stats-band {
    padding: 44px 24px;
  }
}

@media (max-width: 767px) {
  .hero-title {
    font-size: 1.8rem;
  }

  .hero-subtitle {
    font-size: 0.95rem;
  }

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

  .btn {
    justify-content: center;
  }

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

  .section-title {
    font-size: 1.5rem;
  }

  .news-card {
    flex-direction: column;
    align-items: flex-start;
    padding: 20px;
  }

  .news-arrow {
    display: none;
  }

  .news-title {
    white-space: normal;
  }

  .stats-band {
    padding: 32px 16px;
  }

  .stat-number {
    font-size: 1.8rem;
  }

  .process-arrow {
    display: none;
  }

  .cta-section {
    padding: 40px 24px;
  }

  .cta-section h2 {
    font-size: 1.5rem;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }

  .footer .container {
    padding: 0 20px;
  }

  .footer-grid {
    gap: 32px;
  }
}

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

  .hero {
    padding: 56px 0 48px;
  }

  .hero-badge {
    font-size: 0.78rem;
    padding: 6px 14px;
  }

  .hero-title {
    font-size: 1.6rem;
  }

  .hero-actions {
    gap: 10px;
  }

  .hero-stats {
    grid-template-columns: 1fr 1fr;
    gap: 10px;
  }

  .hs-num {
    font-size: 1.4rem;
  }

  .section {
    padding: 44px 0;
  }

  .overview-card {
    padding: 28px 20px;
  }

  .category-card .thumb {
    height: 150px;
  }

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

  .feature-content h3 {
    font-size: 1.2rem;
  }

  .faq-question {
    padding: 16px 18px;
    font-size: 0.9rem;
  }

  .faq-answer-inner {
    padding: 0 18px 18px;
  }

  .cta-section {
    padding: 32px 20px;
    border-radius: 16px;
  }

  .cta-section h2 {
    font-size: 1.3rem;
  }
}

/* ===== 聚焦状态 ===== */
a:focus-visible,
button:focus-visible {
  outline: 2px solid #2563eb;
  outline-offset: 3px;
  border-radius: 4px;
}

/* ===== 滚动条 ===== */
.sidebar::-webkit-scrollbar {
  width: 6px;
}

.sidebar::-webkit-scrollbar-track {
  background: transparent;
}

.sidebar::-webkit-scrollbar-thumb {
  background: rgba(148, 163, 184, 0.2);
  border-radius: 10px;
}

.sidebar::-webkit-scrollbar-thumb:hover {
  background: rgba(148, 163, 184, 0.35);
}

/* roulang page: article */
:root {
  --primary: #2f6bff;
  --primary-dark: #1a4bbf;
  --primary-soft: rgba(47, 107, 255, .12);
  --accent: #00c2a8;
  --accent-soft: rgba(0, 194, 168, .12);
  --bg-body: #f4f7fb;
  --bg-surface: #ffffff;
  --bg-dark: #0b1220;
  --text-main: #0f172a;
  --text-sub: #475569;
  --text-muted: #8896ab;
  --border-color: #e4e9f2;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --shadow-lg: 0 20px 45px rgba(11, 25, 50, .10);
  --shadow-md: 0 10px 25px rgba(11, 25, 50, .08);
  --shadow-sm: 0 4px 12px rgba(11, 25, 50, .06);
  --sidebar-w: 268px;
  --max-w: 1220px;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: "Inter", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", system-ui, sans-serif;
  background: var(--bg-body);
  color: var(--text-main);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
button { border: none; background: none; cursor: pointer; font-family: inherit; }
.container { width: 100%; max-width: var(--max-w); margin: 0 auto; padding: 0 24px; }
.app-sidebar {
  position: fixed; top: 0; left: 0; bottom: 0; width: var(--sidebar-w);
  background: var(--bg-dark);
  z-index: 60; overflow-y: auto;
  border-right: 1px solid rgba(255,255,255,.06);
  transition: transform .3s ease;
}
.sidebar-inner { display: flex; flex-direction: column; height: 100%; padding: 28px 22px; }
.brand-text {
  display: flex; align-items: center; gap: 10px;
  font-size: 1.25rem; font-weight: 800; color: #fff;
  letter-spacing: .01em; white-space: nowrap;
}
.brand-text .brand-icon {
  width: 34px; height: 34px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 10px; font-size: .9rem; color: #fff;
}
.sidebar-nav { margin-top: 46px; display: flex; flex-direction: column; gap: 6px; }
.nav-link {
  display: flex; align-items: center; gap: 14px;
  padding: 13px 18px; border-radius: 14px;
  color: rgba(255,255,255,.72); font-size: .98rem; font-weight: 500;
  transition: all .22s ease; border: 1px solid transparent;
}
.nav-link i { width: 20px; text-align: center; font-size: 1.05rem; }
.nav-link:hover {
  color: #fff; background: rgba(255,255,255,.06);
  transform: translateX(3px);
}
.nav-link.active {
  color: #fff; background: rgba(47,107,255,.24);
  border-color: rgba(47,107,255,.35);
  box-shadow: 0 6px 18px rgba(47,107,255,.14);
}
.sidebar-footer { margin-top: auto; padding-top: 30px; }
.status-pill {
  display: flex; align-items: center; gap: 8px;
  background: rgba(255,255,255,.05); border-radius: 24px;
  padding: 10px 16px; font-size: .82rem; color: rgba(255,255,255,.68);
  border: 1px solid rgba(255,255,255,.06);
}
.mobile-header {
  display: none; align-items: center; justify-content: space-between;
  position: sticky; top: 0; z-index: 70;
  background: rgba(11,18,32,.82); backdrop-filter: blur(14px);
  padding: 15px 22px; border-bottom: 1px solid rgba(255,255,255,.06);
}
.burger-btn {
  width: 42px; height: 42px; border-radius: 12px; color: #fff; font-size: 1.1rem;
  display: flex; align-items: center; justify-content: center;
  background: rgba(255,255,255,.08);
  transition: background .2s ease;
}
.burger-btn:hover { background: rgba(255,255,255,.16); }
.mobile-drawer {
  position: fixed; top: 0; left: 0; bottom: 0; width: 280px; z-index: 90;
  background: var(--bg-dark); transform: translateX(-100%);
  transition: transform .3s ease; display: flex; flex-direction: column;
  padding: 24px 20px; overflow-y: auto;
}
.mobile-drawer.open { transform: translateX(0); }
.drawer-brand { display: flex; align-items: center; gap: 10px; color: #fff; font-weight: 800; font-size: 1.16rem; }
.drawer-close {
  position: absolute; top: 18px; right: 18px; width: 36px; height: 36px;
  border-radius: 10px; background: rgba(255,255,255,.08); color: rgba(255,255,255,.8);
  display: flex; align-items: center; justify-content: center; font-size: 1rem;
  transition: all .2s ease;
}
.drawer-close:hover { background: rgba(255,255,255,.16); color: #fff; }
.drawer-nav { margin-top: 40px; display: flex; flex-direction: column; gap: 6px; }
.drawer-nav a {
  display: flex; align-items: center; gap: 14px; padding: 14px 16px;
  border-radius: 14px; color: rgba(255,255,255,.76); font-weight: 500;
  transition: all .22s ease;
}
.drawer-nav a i { width: 20px; text-align: center; }
.drawer-nav a:hover { color: #fff; background: rgba(255,255,255,.07); }
.drawer-nav a.active { color: #fff; background: rgba(47,107,255,.25); }
.drawer-overlay {
  position: fixed; inset: 0; z-index: 80; background: rgba(0,0,0,.42);
  opacity: 0; visibility: hidden; transition: all .3s ease;
}
.drawer-overlay.show { opacity: 1; visibility: visible; }
.main-wrap { margin-left: var(--sidebar-w); min-height: 100vh; display: flex; flex-direction: column; }
.main-wrap main { flex: 1; }

.article-banner {
  position: relative; padding: 84px 0 116px; overflow: hidden;
  background-size: cover; background-position: center;
}
.banner-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(6,14,32,.94) 0%, rgba(18,32,64,.78) 60%, rgba(47,107,255,.35) 100%);
}
.breadcrumb {
  display: flex; align-items: center; flex-wrap: wrap;
  gap: 8px; font-size: .88rem; color: rgba(255,255,255,.65); margin-bottom: 34px;
}
.breadcrumb a { color: rgba(255,255,255,.82); transition: color .2s ease; }
.breadcrumb a:hover { color: #fff; text-decoration: underline; }
.banner-tags { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 18px; }
.badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 16px; border-radius: 30px; font-size: .82rem; font-weight: 600;
  transition: all .2s ease;
}
.badge-primary { background: rgba(47,107,255,.25); color: #a8c2ff; border: 1px solid rgba(47,107,255,.35); }
.badge-ghost { background: rgba(255,255,255,.1); color: rgba(255,255,255,.8); border: 1px solid rgba(255,255,255,.14); }
.banner-title {
  font-size: clamp(1.9rem, 4vw, 3rem); font-weight: 800; color: #fff;
  line-height: 1.25; letter-spacing: -.02em; max-width: 820px;
}
.banner-desc {
  margin-top: 18px; font-size: 1.08rem; color: rgba(255,255,255,.74);
  max-width: 680px; line-height: 1.8;
}
.article-section { padding: 0 0 30px; position: relative; z-index: 10; }
.article-card {
  background: var(--bg-surface); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg); border: 1px solid var(--border-color);
  margin-top: -60px; overflow: hidden; padding: 0;
}
.article-cover img { width: 100%; max-height: 420px; object-fit: cover; }
.article-body { padding: 48px clamp(20px, 5vw, 64px); }
.article-meta-row {
  display: flex; align-items: center; gap: 18px; flex-wrap: wrap;
  border-bottom: 1px solid var(--border-color); padding: 0 0 26px; margin-bottom: 32px;
  color: var(--text-muted); font-size: .9rem;
}
.meta-item { display: flex; align-items: center; gap: 8px; }
.meta-item i { color: var(--primary); font-size: .85rem; }

.typography { color: #2b3648; font-size: 1.03rem; line-height: 1.95; }
.typography p { margin: 0 0 1.5em; }
.typography h2 {
  font-size: 1.55rem; font-weight: 800; color: #111827;
  margin: 1.9em 0 .8em; line-height: 1.4; letter-spacing: -.01em;
}
.typography h3 { font-size: 1.28rem; font-weight: 700; color: #111827; margin: 1.6em 0 .7em; }
.typography ul, .typography ol { margin: 0 0 1.6em; padding-left: 1.4em; }
.typography li { margin-bottom: .55em; }
.typography a { color: var(--primary); text-decoration: underline; text-underline-offset: 3px; transition: opacity .2s ease; }
.typography a:hover { opacity: .8; }
.typography blockquote {
  border-left: 4px solid var(--primary); background: var(--primary-soft);
  padding: 18px 24px; border-radius: 0 14px 14px 0; margin: 1.5em 0;
  color: #334155; font-style: normal;
}
.typography img { border-radius: 14px; box-shadow: var(--shadow-sm); margin: 1.6em 0; }
.typography strong { color: #111827; }

.not-found-section { padding: 90px 0; }
.not-found-card {
  background: var(--bg-surface); border: 1px solid var(--border-color);
  border-radius: var(--radius-lg); box-shadow: var(--shadow-md);
  padding: 64px 40px; text-align: center; max-width: 640px; margin: 0 auto;
}
.not-found-icon {
  width: 76px; height: 76px; margin: 0 auto 28px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 24px; background: var(--primary-soft); color: var(--primary);
  font-size: 2rem;
}
.not-found-card h2 { font-size: 1.8rem; font-weight: 800; margin-bottom: 12px; }
.not-found-card p { color: var(--text-sub); margin-bottom: 28px; }

.btn-primary {
  display: inline-flex; align-items: center; gap: 10px;
  background: var(--primary); color: #fff; font-weight: 700;
  padding: 13px 28px; border-radius: 14px; font-size: .98rem;
  box-shadow: 0 8px 20px rgba(47,107,255,.28);
  transition: all .22s ease; border: 1px solid rgba(255,255,255,.12);
}
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 12px 26px rgba(47,107,255,.34); }
.btn-primary:active { transform: translateY(0); }

.switch-section { background: var(--bg-surface); border-top: 1px solid var(--border-color); padding: 90px 0; }
.section-head { text-align: center; max-width: 620px; margin: 0 auto 52px; }
.section-head h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); font-weight: 800; letter-spacing: -.02em; }
.section-head p { color: var(--text-sub); margin-top: 12px; font-size: 1.02rem; }
.switch-card {
  display: block; background: var(--bg-body); border: 1px solid var(--border-color);
  border-radius: var(--radius-lg); padding: 36px 30px;
  transition: all .25s ease; position: relative; overflow: hidden;
}
.switch-card:hover {
  border-color: rgba(47,107,255,.4); box-shadow: var(--shadow-md);
  transform: translateY(-6px); background: #fff;
}
.switch-icon {
  width: 52px; height: 52px; border-radius: 16px;
  display: flex; align-items: center; justify-content: center;
  background: var(--primary-soft); color: var(--primary); font-size: 1.35rem;
  margin-bottom: 22px; transition: all .25s ease;
}
.switch-card:hover .switch-icon { background: var(--primary); color: #fff; }
.switch-card h3 { font-size: 1.14rem; font-weight: 700; margin-bottom: 10px; }
.switch-card p { font-size: .9rem; color: var(--text-sub); line-height: 1.7; }
.switch-link { margin-top: 18px; display: inline-flex; align-items: center; gap: 8px; font-size: .88rem; font-weight: 700; color: var(--primary); }
.switch-card:hover .switch-link i { transform: translateX(4px); }
.switch-link i { transition: transform .2s ease; }

.cta-band { padding: 30px 0 90px; background: var(--bg-surface); }
.cta-inner {
  display: flex; align-items: center; justify-content: space-between; gap: 30px;
  background: linear-gradient(135deg, #123, #1b3a6b);
  border-radius: 24px; padding: 48px 54px; position: relative; overflow: hidden;
}
.cta-inner::after {
  content: ''; position: absolute; right: -60px; top: -60px; width: 220px; height: 220px;
  background: radial-gradient(circle, rgba(47,107,255,.35), transparent 70%);
  pointer-events: none;
}
.cta-inner h2 { color: #fff; font-size: 1.7rem; font-weight: 800; }
.cta-inner p { color: rgba(255,255,255,.7); margin-top: 8px; }
.btn-light {
  display: inline-flex; align-items: center; gap: 10px;
  background: #fff; color: #0f172a; font-weight: 700;
  padding: 14px 30px; border-radius: 14px; font-size: .98rem;
  box-shadow: 0 10px 24px rgba(0,0,0,.14); transition: all .22s ease;
  flex-shrink: 0;
}
.btn-light:hover { transform: translateY(-2px); box-shadow: 0 14px 30px rgba(0,0,0,.2); }
.btn-light i { color: var(--primary); }

.footer {
  background: var(--bg-dark); color: rgba(255,255,255,.65);
  padding: 62px 0 30px; border-top: 1px solid rgba(255,255,255,.06);
}
.footer .container { max-width: var(--max-w); }
.footer-brand { display: flex; align-items: center; gap: 10px; color: #fff; font-weight: 800; font-size: 1.18rem; margin-bottom: 16px; }
.brand-icon {
  width: 34px; height: 34px; display: flex; align-items: center; justify-content: center;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 10px; color: #fff; font-size: .9rem;
}
.footer-desc { font-size: .92rem; line-height: 1.8; max-width: 320px; }
.footer-link-title { color: #fff; font-size: 1rem; font-weight: 700; margin-bottom: 18px; }
.footer-links { display: flex; flex-direction: column; gap: 12px; }
.footer-links a {
  display: inline-flex; align-items: center; gap: 8px; color: rgba(255,255,255,.6);
  font-size: .92rem; transition: all .2s ease;
}
.footer-links a:hover { color: #fff; transform: translateX(3px); }
.footer-bottom {
  display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap;
  border-top: 1px solid rgba(255,255,255,.08); padding-top: 26px; margin-top: 50px;
  font-size: .82rem; color: rgba(255,255,255,.42);
}

@media (max-width: 1024px) {
  .app-sidebar { transform: translateX(-100%); box-shadow: none; }
  .main-wrap { margin-left: 0; }
  .mobile-header { display: flex; }
  .article-banner { padding: 60px 0 110px; }
  .cta-inner { flex-direction: column; text-align: center; padding: 40px 28px; }
  .btn-light { width: max-content; }
}
@media (max-width: 768px) {
  .container { padding: 0 20px; }
  .article-banner { padding: 44px 0 104px; }
  .article-body { padding: 32px 20px; }
  .article-meta-row { gap: 12px; padding-bottom: 20px; margin-bottom: 24px; }
  .footer { padding: 44px 0 24px; }
  .footer-bottom { flex-direction: column; gap: 10px; text-align: center; }
}
@media (max-width: 520px) {
  .banner-title { font-size: 1.55rem; }
  .banner-desc { font-size: .95rem; }
  .badge { font-size: .74rem; padding: 4px 12px; }
  .not-found-card { padding: 40px 22px; }
  .switch-card { padding: 26px 20px; }
  .cta-inner { padding: 32px 20px; }
  .cta-inner h2 { font-size: 1.3rem; }
  .btn-light { width: 100%; justify-content: center; padding: 13px 20px; font-size: .9rem; }
  .btn-primary { width: 100%; justify-content: center; }
}

/* roulang page: category1 */
:root {
            --brand: #0b1b3f;
            --brand-2: #101f4e;
            --accent: #c8a45d;
            --accent-dark: #a8853f;
            --accent-soft: rgba(200, 164, 93, .14);
            --bg: #f4f6fb;
            --card: #ffffff;
            --text: #1e2535;
            --muted: #667085;
            --border: #e4e8f0;
            --radius: 18px;
            --radius-sm: 10px;
            --shadow: 0 10px 30px rgba(11, 27, 63, .08);
            --shadow-lg: 0 24px 60px rgba(11, 27, 63, .16);
        }

        * {
            box-sizing: border-box;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'Inter', 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            background-color: var(--bg);
            color: var(--text);
            line-height: 1.7;
            margin: 0;
            -webkit-font-smoothing: antialiased;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: color .25s ease, background-color .25s ease, border-color .25s ease, box-shadow .25s ease, transform .25s ease;
        }

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

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

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

        .container {
            width: 100%;
            max-width: 1280px;
            margin: 0 auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }

        /* ========== 侧边导航 ========== */
        .sidebar {
            position: fixed;
            left: 0;
            top: 0;
            width: 264px;
            height: 100vh;
            background: linear-gradient(180deg, #0b1b3f 0%, #101f4e 100%);
            color: #fff;
            z-index: 50;
            display: flex;
            flex-direction: column;
            padding: 28px 18px 20px;
            border-right: 1px solid rgba(255, 255, 255, .06);
            transition: transform .3s ease;
        }

        .sidebar-brand {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 4px 8px 22px;
            border-bottom: 1px solid rgba(255, 255, 255, .08);
            margin-bottom: 20px;
        }

        .brand-icon {
            width: 38px;
            height: 38px;
            border-radius: 12px;
            background: linear-gradient(135deg, #c8a45d, #a8853f);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            color: #0b1b3f;
            flex-shrink: 0;
        }

        .brand-text {
            font-weight: 800;
            font-size: 1.12rem;
            letter-spacing: .5px;
            color: #fff;
            white-space: nowrap;
        }

        .nav-label {
            font-size: .72rem;
            letter-spacing: .16em;
            text-transform: uppercase;
            color: rgba(255, 255, 255, .45);
            padding: 0 12px;
            margin: 16px 0 8px;
            font-weight: 700;
        }

        .nav-item {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 12px 14px;
            margin-bottom: 6px;
            border-radius: 12px;
            color: rgba(255, 255, 255, .75);
            font-weight: 500;
            font-size: .95rem;
            border-left: 3px solid transparent;
            transition: all .25s ease;
        }

        .nav-item i {
            width: 20px;
            text-align: center;
            font-size: .95rem;
            opacity: .85;
        }

        .nav-item:hover {
            background: rgba(255, 255, 255, .07);
            color: #fff;
        }

        .nav-item.active {
            background: var(--accent-soft);
            color: #f0d69c;
            border-left-color: var(--accent);
        }

        .sidebar-foot {
            margin-top: auto;
            padding: 16px 12px;
            background: rgba(255, 255, 255, .06);
            border-radius: 14px;
            font-size: .8rem;
            color: rgba(255, 255, 255, .6);
            line-height: 1.6;
        }

        .sidebar-foot i {
            color: var(--accent);
            margin-right: 6px;
        }

        /* ========== 移动顶部栏 ========== */
        .mobile-header {
            display: none;
            align-items: center;
            justify-content: space-between;
            padding: 14px 20px;
            background: rgba(11, 27, 63, .92);
            backdrop-filter: blur(12px);
            position: sticky;
            top: 0;
            z-index: 55;
            border-bottom: 1px solid rgba(255, 255, 255, .08);
        }

        .mobile-header .brand-text {
            font-size: 1.02rem;
        }

        .burger-btn {
            width: 42px;
            height: 42px;
            border-radius: 12px;
            background: rgba(255, 255, 255, .08);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1rem;
            transition: background .25s;
        }

        .burger-btn:hover {
            background: rgba(255, 255, 255, .15);
        }

        .drawer-overlay {
            position: fixed;
            inset: 0;
            background: rgba(0, 0, 0, .5);
            z-index: 58;
            opacity: 0;
            visibility: hidden;
            transition: opacity .3s, visibility .3s;
        }

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

        .drawer {
            position: fixed;
            top: 0;
            left: 0;
            width: 280px;
            height: 100vh;
            background: linear-gradient(180deg, #0b1b3f, #101f4e);
            z-index: 60;
            padding: 28px 18px;
            transform: translateX(-100%);
            transition: transform .35s ease;
            display: flex;
            flex-direction: column;
            overflow-y: auto;
        }

        .drawer.open {
            transform: none;
        }

        .drawer .sidebar-brand {
            border-bottom-color: rgba(255, 255, 255, .08);
        }

        .drawer .sidebar-foot {
            margin-top: auto;
        }

        /* ========== 主内容 ========== */
        .main-content {
            margin-left: 264px;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        @media (max-width: 1023px) {
            .sidebar {
                display: none;
            }
            .mobile-header {
                display: flex;
            }
            .main-content {
                margin-left: 0;
            }
        }

        /* ========== Hero ========== */
        .entry-hero {
            padding: 86px 0 80px;
            background: linear-gradient(120deg, rgba(11, 27, 63, .92), rgba(16, 31, 78, .82)), url('/assets/images/backpic/back-2.png') center / cover no-repeat;
            color: #fff;
            position: relative;
        }

        .entry-hero .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(200, 164, 93, .18);
            border: 1px solid rgba(200, 164, 93, .35);
            color: #f0d69c;
            font-size: .8rem;
            font-weight: 600;
            padding: 6px 14px;
            border-radius: 999px;
            margin-bottom: 18px;
        }

        .entry-hero h1 {
            font-size: clamp(2.1rem, 4vw, 3.25rem);
            font-weight: 800;
            line-height: 1.2;
            margin-bottom: 18px;
            letter-spacing: .5px;
        }

        .entry-hero p {
            max-width: 720px;
            color: rgba(255, 255, 255, .8);
            font-size: 1.05rem;
            line-height: 1.8;
            margin-bottom: 28px;
        }

        .breadcrumb {
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            gap: 8px;
            font-size: .82rem;
            color: rgba(255, 255, 255, .55);
            margin-bottom: 10px;
        }

        .breadcrumb a:hover {
            color: #f0d69c;
        }

        .breadcrumb i {
            font-size: .65rem;
            opacity: .7;
        }

        .hero-stats {
            display: flex;
            flex-wrap: wrap;
            gap: 24px;
            margin-top: 34px;
            padding-top: 28px;
            border-top: 1px solid rgba(255, 255, 255, .12);
        }

        .hero-stat {
            display: flex;
            align-items: center;
            gap: 12px;
        }

        .hero-stat i {
            width: 38px;
            height: 38px;
            border-radius: 10px;
            background: rgba(200, 164, 93, .16);
            color: #f0d69c;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: .9rem;
        }

        .hero-stat span {
            font-size: .82rem;
            color: rgba(255, 255, 255, .62);
            line-height: 1.4;
        }

        .hero-stat b {
            display: block;
            font-size: 1rem;
            color: #fff;
            font-weight: 700;
        }

        /* ========== 通用板块 ========== */
        .section {
            padding: 72px 0;
        }

        .section-alt {
            background: #fff;
        }

        .section-head {
            max-width: 760px;
            margin-bottom: 48px;
        }

        .section-head.center {
            margin-left: auto;
            margin-right: auto;
            text-align: center;
        }

        .section-mini {
            display: inline-block;
            font-size: .75rem;
            font-weight: 700;
            letter-spacing: .18em;
            text-transform: uppercase;
            color: var(--accent-dark);
            background: var(--accent-soft);
            padding: 5px 14px;
            border-radius: 999px;
            margin-bottom: 12px;
        }

        .section-head h2 {
            font-size: clamp(1.6rem, 3vw, 2.3rem);
            font-weight: 800;
            color: var(--brand);
            line-height: 1.25;
            margin-bottom: 14px;
        }

        .section-head p {
            color: var(--muted);
            font-size: .98rem;
            line-height: 1.8;
        }

        .badge {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            font-size: .78rem;
            font-weight: 600;
            padding: 5px 12px;
            border-radius: 999px;
            background: var(--accent-soft);
            color: var(--accent-dark);
            border: 1px solid rgba(200, 164, 93, .25);
        }

        .badge-blue {
            background: rgba(37, 99, 235, .08);
            color: #2563eb;
            border-color: rgba(37, 99, 235, .18);
        }

        .badge-green {
            background: rgba(16, 185, 129, .1);
            color: #059669;
            border-color: rgba(16, 185, 129, .2);
        }

        .badge-gray {
            background: rgba(102, 112, 133, .08);
            color: #475467;
            border-color: rgba(102, 112, 133, .18);
        }

        /* ========== 按钮 ========== */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            gap: 10px;
            font-weight: 600;
            font-size: .92rem;
            padding: 12px 26px;
            border-radius: 12px;
            border: 1px solid transparent;
            transition: all .3s ease;
        }

        .btn-primary {
            background: linear-gradient(135deg, #c8a45d, #a8853f);
            color: #0b1b3f;
            box-shadow: 0 8px 24px rgba(200, 164, 93, .35);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 14px 30px rgba(200, 164, 93, .45);
        }

        .btn-outline {
            background: transparent;
            border-color: rgba(255, 255, 255, .35);
            color: #fff;
        }

        .btn-outline:hover {
            border-color: #f0d69c;
            color: #f0d69c;
            background: rgba(200, 164, 93, .08);
        }

        .btn-dark {
            background: var(--brand);
            color: #fff;
            box-shadow: 0 8px 24px rgba(11, 27, 63, .2);
        }

        .btn-dark:hover {
            transform: translateY(-2px);
            box-shadow: 0 14px 34px rgba(11, 27, 63, .28);
        }

        /* ========== 卡片 ========== */
        .card {
            background: var(--card);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            box-shadow: var(--shadow);
            transition: all .3s ease;
        }

        .card:hover {
            transform: translateY(-4px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(200, 164, 93, .4);
        }

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

        .cover-card img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        /* ========== 分类入口卡 ========== */
        .entry-card {
            background: #fff;
            border-radius: var(--radius);
            padding: 30px 26px;
            border: 1px solid var(--border);
            box-shadow: var(--shadow);
            height: 100%;
            transition: all .3s ease;
            position: relative;
            overflow: hidden;
        }

        .entry-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 4px;
            background: linear-gradient(90deg, #c8a45d, #a8853f);
            opacity: 0;
            transition: opacity .3s;
        }

        .entry-card:hover {
            transform: translateY(-6px);
            box-shadow: var(--shadow-lg);
            border-color: rgba(200, 164, 93, .35);
        }

        .entry-card:hover::before {
            opacity: 1;
        }

        .entry-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            background: linear-gradient(135deg, rgba(200, 164, 93, .18), rgba(200, 164, 93, .06));
            color: var(--accent-dark);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.25rem;
            margin-bottom: 20px;
        }

        .entry-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            color: var(--brand);
            margin-bottom: 10px;
        }

        .entry-card p {
            color: var(--muted);
            font-size: .9rem;
            line-height: 1.75;
            margin-bottom: 18px;
        }

        .entry-card .card-link {
            font-size: .86rem;
            font-weight: 600;
            color: var(--accent-dark);
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }

        .entry-card .card-link:hover {
            gap: 10px;
            color: var(--brand);
        }

        /* ========== 步骤流程 ========== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .step-card {
            background: #fff;
            border-radius: var(--radius);
            padding: 28px 24px;
            border: 1px solid var(--border);
            position: relative;
            box-shadow: var(--shadow);
            height: 100%;
            transition: all .3s ease;
        }

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

        .step-num {
            font-size: 2.2rem;
            font-weight: 800;
            color: transparent;
            -webkit-text-stroke: 1.5px var(--accent);
            line-height: 1;
            margin-bottom: 14px;
        }

        .step-card h3 {
            font-size: 1rem;
            font-weight: 700;
            color: var(--brand);
            margin-bottom: 8px;
        }

        .step-card p {
            font-size: .85rem;
            color: var(--muted);
            line-height: 1.7;
        }

        @media (max-width: 1023px) {
            .steps-grid {
                grid-template-columns: repeat(2, 1fr);
            }
        }

        @media (max-width: 520px) {
            .steps-grid {
                grid-template-columns: 1fr;
            }
        }

        /* ========== 安全须知深色区块 ========== */
        .security-band {
            background: linear-gradient(135deg, #0b1b3f, #111f35);
            border-radius: 28px;
            padding: 56px;
            color: #fff;
            position: relative;
            overflow: hidden;
        }

        .security-band::after {
            content: '';
            position: absolute;
            right: -60px;
            top: -60px;
            width: 260px;
            height: 260px;
            border-radius: 50%;
            background: rgba(200, 164, 93, .12);
            filter: blur(60px);
        }

        .security-list {
            list-style: none;
            padding: 0;
            margin: 0;
        }

        .security-list li {
            display: flex;
            align-items: flex-start;
            gap: 14px;
            padding: 14px 0;
            border-bottom: 1px solid rgba(255, 255, 255, .08);
            font-size: .95rem;
            line-height: 1.7;
            color: rgba(255, 255, 255, .82);
        }

        .security-list li:last-child {
            border-bottom: none;
        }

        .security-list li i {
            color: var(--accent);
            margin-top: 4px;
            font-size: .9rem;
        }

        .security-img-wrap {
            border-radius: 20px;
            overflow: hidden;
            box-shadow: 0 20px 50px rgba(0, 0, 0, .3);
            height: 100%;
            min-height: 320px;
        }

        .security-img-wrap img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        /* ========== 数据指标 ========== */
        .metrics-band {
            background: linear-gradient(120deg, #f8f6f1, #f1efe8);
            border: 1px solid rgba(200, 164, 93, .25);
            border-radius: 24px;
            padding: 48px 40px;
        }

        .metric-item {
            text-align: center;
            padding: 20px 16px;
            border-right: 1px solid rgba(11, 27, 63, .08);
        }

        .metric-item:last-child {
            border-right: none;
        }

        .metric-item .metric-num {
            font-size: 2rem;
            font-weight: 800;
            color: var(--brand);
            line-height: 1.2;
        }

        .metric-item .metric-label {
            font-size: .82rem;
            color: var(--muted);
            margin-top: 6px;
        }

        @media (max-width: 767px) {
            .metric-item {
                border-right: none;
                border-bottom: 1px solid rgba(11, 27, 63, .08);
            }
            .metric-item:last-child {
                border-bottom: none;
            }
        }

        /* ========== FAQ ========== */
        .faq-card {
            background: #fff;
            border: 1px solid var(--border);
            border-radius: var(--radius);
            margin-bottom: 14px;
            overflow: hidden;
            transition: border-color .3s, box-shadow .3s;
        }

        .faq-card.open {
            border-color: rgba(200, 164, 93, .4);
            box-shadow: var(--shadow);
        }

        .faq-question {
            width: 100%;
            padding: 20px 24px;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 16px;
            font-size: .98rem;
            font-weight: 600;
            color: var(--brand);
            text-align: left;
            background: transparent;
        }

        .faq-question i {
            font-size: .9rem;
            color: var(--accent-dark);
            transition: transform .3s;
            flex-shrink: 0;
        }

        .faq-card.open .faq-question i {
            transform: rotate(45deg);
        }

        .faq-answer {
            max-height: 0;
            overflow: hidden;
            transition: max-height .35s ease;
        }

        .faq-answer-inner {
            padding: 0 24px 22px;
            color: var(--muted);
            font-size: .92rem;
            line-height: 1.8;
        }

        /* ========== CTA ========== */
        .cta-band {
            background: linear-gradient(135deg, var(--brand), #16295e);
            border-radius: 28px;
            padding: 56px 48px;
            color: #fff;
            position: relative;
            overflow: hidden;
            text-align: center;
        }

        .cta-band::before {
            content: '';
            position: absolute;
            left: -40px;
            bottom: -80px;
            width: 300px;
            height: 300px;
            border-radius: 50%;
            background: rgba(200, 164, 93, .14);
            filter: blur(50px);
        }

        .cta-band h2 {
            font-size: 2rem;
            font-weight: 800;
            margin-bottom: 14px;
        }

        .cta-band p {
            color: rgba(255, 255, 255, .75);
            max-width: 600px;
            margin: 0 auto 28px;
            line-height: 1.8;
        }

        /* ========== 页脚 ========== */
        .footer {
            background: #0b1b3f;
            color: rgba(255, 255, 255, .72);
            padding: 64px 0 0;
            margin-top: auto;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 12px;
            font-size: 1.1rem;
            font-weight: 800;
            color: #fff;
            margin-bottom: 16px;
        }

        .footer-desc {
            font-size: .88rem;
            line-height: 1.8;
            color: rgba(255, 255, 255, .58);
            max-width: 320px;
        }

        .footer-link-title {
            font-size: .92rem;
            font-weight: 700;
            color: #fff;
            margin-bottom: 18px;
            letter-spacing: .05em;
        }

        .footer-links {
            display: flex;
            flex-direction: column;
            align-items: flex-start;
            gap: 10px;
        }

        .footer-links a {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: .88rem;
            color: rgba(255, 255, 255, .6);
        }

        .footer-links a:hover {
            color: #f0d69c;
        }

        .footer-links a i {
            font-size: .65rem;
            color: var(--accent);
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .08);
            margin-top: 48px;
            padding: 22px 0;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 10px;
            font-size: .82rem;
            color: rgba(255, 255, 255, .45);
        }

        /* ========== 通用工具 ========== */
        .feature-list {
            list-style: none;
            padding: 0;
            margin: 20px 0 0;
        }

        .feature-list li {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 8px 0;
            font-size: .92rem;
            color: var(--text);
        }

        .feature-list li i {
            width: 24px;
            height: 24px;
            border-radius: 50%;
            background: rgba(16, 185, 129, .1);
            color: #059669;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: .7rem;
            flex-shrink: 0;
        }

        .divider {
            height: 1px;
            background: var(--border);
            margin: 14px 0;
        }

        :focus-visible {
            outline: 2px solid var(--accent);
            outline-offset: 3px;
            border-radius: 6px;
        }

/* roulang page: category2 */
:root {
            --primary: #4f46e5;
            --primary-light: #818cf8;
            --primary-dark: #3730a3;
            --accent: #06b6d4;
            --bg-body: #f8fafc;
            --bg-dark: #0f172a;
            --bg-sidebar: #ffffff;
            --text-main: #1e293b;
            --text-weak: #64748b;
            --border-light: #e2e8f0;
            --radius-lg: 16px;
            --radius-xl: 24px;
            --shadow-card: 0 1px 3px rgba(0,0,0,0.06), 0 4px 16px rgba(0,0,0,0.04);
            --shadow-hover: 0 4px 12px rgba(0,0,0,0.08), 0 12px 32px rgba(0,0,0,0.08);
        }

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

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
            background-color: var(--bg-body);
            color: var(--text-main);
            line-height: 1.6;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
        }

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

        a {
            text-decoration: none;
            color: inherit;
            transition: color .2s ease;
        }

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

        input,
        textarea {
            font-family: inherit;
        }

        .container-page {
            max-width: 1200px;
            margin: 0 auto;
            padding-left: 1.5rem;
            padding-right: 1.5rem;
        }

        /* ===== 侧边导航 ===== */
        .sidebar-nav {
            position: fixed;
            top: 0;
            left: 0;
            width: 260px;
            height: 100vh;
            background: var(--bg-sidebar);
            border-right: 1px solid var(--border-light);
            display: flex;
            flex-direction: column;
            z-index: 100;
            transition: transform .3s ease;
        }

        .sidebar-logo {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 24px 20px 18px;
            border-bottom: 1px solid var(--border-light);
        }

        .brand-icon {
            width: 40px;
            height: 40px;
            border-radius: 12px;
            background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.1rem;
            box-shadow: 0 4px 12px rgba(79, 70, 229, .3);
            flex-shrink: 0;
        }

        .brand-text {
            font-size: 1.05rem;
            font-weight: 800;
            letter-spacing: .5px;
            color: #1e293b;
            white-space: nowrap;
        }

        .sidebar-label {
            padding: 24px 24px 8px;
            font-size: .75rem;
            font-weight: 600;
            text-transform: uppercase;
            letter-spacing: .08em;
            color: #94a3b8;
        }

        .sidebar-menu {
            list-style: none;
            padding: 8px 14px;
            display: flex;
            flex-direction: column;
            gap: 4px;
        }

        .sidebar-menu li a {
            display: flex;
            align-items: center;
            gap: 12px;
            padding: 11px 14px;
            border-radius: 10px;
            font-size: .925rem;
            font-weight: 500;
            color: #475569;
            transition: all .2s ease;
        }

        .sidebar-menu li a i {
            width: 20px;
            text-align: center;
            color: #94a3b8;
            font-size: .95rem;
            transition: color .2s;
        }

        .sidebar-menu li a:hover {
            background: #f1f5f9;
            color: var(--primary);
        }

        .sidebar-menu li a:hover i {
            color: var(--primary);
        }

        .sidebar-menu li a.active {
            background: linear-gradient(135deg, rgba(79, 70, 229, .10), rgba(6, 182, 212, .08));
            color: var(--primary);
            font-weight: 600;
            box-shadow: inset 3px 0 0 var(--primary);
        }

        .sidebar-menu li a.active i {
            color: var(--primary);
        }

        .sidebar-foot {
            margin-top: auto;
            padding: 16px 20px;
            border-top: 1px solid var(--border-light);
            font-size: .8rem;
            color: #94a3b8;
            line-height: 1.5;
        }

        .sidebar-foot .status-dot {
            display: inline-block;
            width: 8px;
            height: 8px;
            border-radius: 50%;
            background: #10b981;
            margin-right: 6px;
            box-shadow: 0 0 0 2px rgba(16, 185, 129, .2);
        }

        .mobile-header {
            display: none;
            position: sticky;
            top: 0;
            z-index: 999;
            background: rgba(255, 255, 255, .92);
            backdrop-filter: blur(12px);
            -webkit-backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border-light);
            padding: 0 20px;
            height: 60px;
            align-items: center;
            justify-content: space-between;
        }

        .burger-btn {
            width: 40px;
            height: 40px;
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #334155;
            font-size: 1.15rem;
            background: #f8fafc;
            border: 1px solid var(--border-light);
            transition: all .2s;
        }

        .burger-btn:hover {
            background: #f1f5f9;
            color: var(--primary);
        }

        .mobile-drawer-mask {
            display: none;
            position: fixed;
            inset: 0;
            background: rgba(15, 23, 42, .5);
            z-index: 998;
            opacity: 0;
            transition: opacity .3s;
        }

        .mobile-drawer-mask.open {
            display: block;
            opacity: 1;
        }

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

        @media (max-width: 1023px) {
            .sidebar-nav {
                transform: translateX(-100%);
                box-shadow: 4px 0 30px rgba(0, 0, 0, .1);
            }
            .mobile-header {
                display: flex;
            }
            .main-wrapper {
                margin-left: 0 !important;
            }
        }

        /* ===== 主区域 ===== */
        .main-wrapper {
            margin-left: 260px;
            min-height: 100vh;
            display: flex;
            flex-direction: column;
        }

        .main-content {
            flex: 1;
        }

        /* ===== Hero 板块 ===== */
        .category-hero {
            position: relative;
            padding: 80px 0 72px;
            background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 55%, #312e81 100%);
            overflow: hidden;
        }

        .category-hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-2.png');
            background-size: cover;
            background-position: center;
            opacity: .25;
            z-index: 0;
        }

        .category-hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(90deg, rgba(15, 23, 42, .9) 0%, rgba(15, 23, 42, .55) 50%, rgba(15, 23, 42, .3) 100%);
            z-index: 1;
        }

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

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, .12);
            border: 1px solid rgba(255, 255, 255, .18);
            backdrop-filter: blur(6px);
            border-radius: 999px;
            padding: 8px 18px;
            font-size: .85rem;
            color: #e0e7ff;
            font-weight: 500;
            margin-bottom: 20px;
        }

        .hero-badge i {
            color: #22d3ee;
        }

        .hero-title {
            font-size: clamp(2.2rem, 4vw, 3.2rem);
            font-weight: 800;
            line-height: 1.2;
            color: #fff;
            letter-spacing: .02em;
            margin-bottom: 16px;
        }

        .hero-title span {
            background: linear-gradient(90deg, #a5b4fc, #22d3ee);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }

        .hero-sub {
            font-size: 1.1rem;
            color: rgba(255, 255, 255, .85);
            max-width: 600px;
            line-height: 1.8;
            margin-bottom: 32px;
        }

        .hero-actions {
            display: flex;
            flex-wrap: wrap;
            gap: 14px;
        }

        /* ===== 按钮 ===== */
        .btn {
            display: inline-flex;
            align-items: center;
            gap: 9px;
            padding: 12px 24px;
            border-radius: 12px;
            font-weight: 600;
            font-size: .95rem;
            transition: all .25s ease;
            border: none;
            cursor: pointer;
        }

        .btn-primary {
            background: linear-gradient(135deg, #4f46e5, #7c3aed);
            color: #fff;
            box-shadow: 0 4px 14px rgba(79, 70, 229, .35);
        }

        .btn-primary:hover {
            box-shadow: 0 8px 22px rgba(79, 70, 229, .45);
            transform: translateY(-2px);
        }

        .btn-outline-light {
            background: rgba(255, 255, 255, .08);
            border: 1px solid rgba(255, 255, 255, .25);
            color: #fff;
            backdrop-filter: blur(6px);
        }

        .btn-outline-light:hover {
            background: rgba(255, 255, 255, .18);
            border-color: rgba(255, 255, 255, .4);
            transform: translateY(-2px);
        }

        .btn-accent {
            background: linear-gradient(135deg, #06b6d4, #0ea5e9);
            color: #fff;
            box-shadow: 0 4px 14px rgba(6, 182, 212, .3);
        }

        .btn-accent:hover {
            box-shadow: 0 8px 22px rgba(6, 182, 212, .4);
            transform: translateY(-2px);
        }

        .btn:focus-visible,
        a:focus-visible,
        button:focus-visible {
            outline: 3px solid rgba(99, 102, 241, .4);
            outline-offset: 2px;
        }

        /* ===== 数据条 ===== */
        .hero-stats {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 48px;
            padding-top: 40px;
            border-top: 1px solid rgba(255, 255, 255, .12);
        }

        .stat-item {
            text-align: left;
        }

        .stat-num {
            font-size: 2rem;
            font-weight: 800;
            color: #fff;
            letter-spacing: .02em;
        }

        .stat-num small {
            font-size: 1rem;
            color: #a5b4fc;
            margin-left: 2px;
        }

        .stat-label {
            font-size: .875rem;
            color: rgba(255, 255, 255, .7);
            margin-top: 4px;
        }

        /* ===== 板块通用 ===== */
        .section-pad {
            padding: 72px 0;
        }

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

        .section-eyebrow {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            font-size: .85rem;
            font-weight: 600;
            color: var(--primary);
            background: rgba(79, 70, 229, .08);
            border-radius: 999px;
            padding: 6px 14px;
            margin-bottom: 14px;
            letter-spacing: .04em;
        }

        .section-title {
            font-size: clamp(1.8rem, 3vw, 2.4rem);
            font-weight: 800;
            line-height: 1.3;
            color: #1e293b;
            letter-spacing: .01em;
        }

        .section-desc {
            color: var(--text-weak);
            font-size: 1rem;
            line-height: 1.8;
            max-width: 680px;
            margin-top: 12px;
        }

        /* ===== 卡片 ===== */
        .feature-card {
            background: #fff;
            border-radius: var(--radius-lg);
            padding: 32px 28px;
            box-shadow: var(--shadow-card);
            border: 1px solid rgba(226, 232, 240, .6);
            transition: all .3s ease;
            height: 100%;
        }

        .feature-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            border-color: rgba(99, 102, 241, .3);
        }

        .feature-card .fk-icon {
            width: 52px;
            height: 52px;
            border-radius: 14px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.35rem;
            margin-bottom: 20px;
        }

        .feature-card h3 {
            font-size: 1.15rem;
            font-weight: 700;
            margin-bottom: 12px;
            color: #1e293b;
        }

        .feature-card p {
            font-size: .925rem;
            color: var(--text-weak);
            line-height: 1.7;
        }

        .fk-purple {
            background: rgba(99, 102, 241, .12);
            color: #4f46e5;
        }

        .fk-cyan {
            background: rgba(14, 165, 233, .12);
            color: #0284c7;
        }

        .fk-green {
            background: rgba(16, 185, 129, .12);
            color: #059669;
        }

        .fk-orange {
            background: rgba(245, 158, 11, .12);
            color: #d97706;
        }

        /* ===== 分类卡片 ===== */
        .cat-card {
            background: #fff;
            border-radius: var(--radius-lg);
            overflow: hidden;
            border: 1px solid rgba(226, 232, 240, .6);
            box-shadow: var(--shadow-card);
            transition: all .3s ease;
            height: 100%;
            display: flex;
            flex-direction: column;
        }

        .cat-card:hover {
            box-shadow: var(--shadow-hover);
            transform: translateY(-4px);
            border-color: rgba(99, 102, 241, .25);
        }

        .cat-thumb {
            position: relative;
            height: 180px;
            overflow: hidden;
            background-color: #e2e8f0;
        }

        .cat-thumb img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: transform .4s ease;
        }

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

        .cat-thumb-overlay {
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, rgba(15, 23, 42, 0) 40%, rgba(15, 23, 42, .45) 100%);
        }

        .cat-tag {
            position: absolute;
            top: 14px;
            left: 14px;
            background: rgba(255, 255, 255, .92);
            backdrop-filter: blur(4px);
            border-radius: 999px;
            padding: 5px 14px;
            font-size: .78rem;
            font-weight: 600;
            color: #1e293b;
        }

        .cat-body {
            padding: 24px 22px;
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        .cat-body h3 {
            font-size: 1.1rem;
            font-weight: 700;
            margin-bottom: 10px;
            color: #1e293b;
        }

        .cat-body p {
            font-size: .9rem;
            color: var(--text-weak);
            line-height: 1.7;
            flex: 1;
        }

        .cat-link {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            color: var(--primary);
            font-size: .875rem;
            font-weight: 600;
            margin-top: 16px;
            transition: gap .2s ease;
        }

        .cat-link:hover {
            gap: 12px;
        }

        /* ===== 深度图文版块 ===== */
        .deep-block {
            background: #fff;
            border-radius: var(--radius-xl);
            padding: 40px;
            box-shadow: var(--shadow-card);
            border: 1px solid rgba(226, 232, 240, .5);
        }

        .deep-block .step-item {
            display: flex;
            gap: 18px;
            margin-bottom: 28px;
        }

        .step-num {
            width: 34px;
            height: 34px;
            min-width: 34px;
            border-radius: 50%;
            background: linear-gradient(135deg, #4f46e5, #7c3aed);
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: .9rem;
            font-weight: 700;
            box-shadow: 0 4px 10px rgba(79, 70, 229, .3);
        }

        .step-content h4 {
            font-size: 1.02rem;
            font-weight: 600;
            margin-bottom: 6px;
        }

        .step-content p {
            font-size: .9rem;
            color: var(--text-weak);
            line-height: 1.7;
        }

        /* ===== 数据面板 ===== */
        .tech-panel {
            background: linear-gradient(135deg, #0f172a, #1e1b4b);
            border-radius: var(--radius-xl);
            padding: 48px 48px;
            color: #fff;
            position: relative;
            overflow: hidden;
        }

        .tech-panel::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-3.png');
            background-size: cover;
            background-position: center;
            opacity: .15;
        }

        .tech-panel .container-inner {
            position: relative;
            z-index: 2;
        }

        .tech-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 28px;
            margin-top: 32px;
        }

        .tech-item {
            background: rgba(255, 255, 255, .06);
            border: 1px solid rgba(255, 255, 255, .1);
            backdrop-filter: blur(6px);
            border-radius: 16px;
            padding: 24px 20px;
            text-align: center;
            transition: background .3s;
        }

        .tech-item:hover {
            background: rgba(255, 255, 255, .1);
        }

        .tech-item .t-icon {
            font-size: 1.5rem;
            margin-bottom: 12px;
            color: #22d3ee;
        }

        .tech-item .t-num {
            font-size: 1.75rem;
            font-weight: 800;
            letter-spacing: .02em;
        }

        .tech-item .t-label {
            font-size: .85rem;
            color: rgba(255, 255, 255, .7);
            margin-top: 4px;
        }

        /* ===== FAQ ===== */
        .faq-item {
            background: #fff;
            border-radius: 14px;
            border: 1px solid var(--border-light);
            margin-bottom: 14px;
            overflow: hidden;
            transition: box-shadow .3s, border-color .3s;
        }

        .faq-item:hover {
            border-color: rgba(99, 102, 241, .3);
            box-shadow: var(--shadow-card);
        }

        .faq-q {
            padding: 20px 24px;
            font-weight: 600;
            font-size: .98rem;
            display: flex;
            align-items: center;
            justify-content: space-between;
            cursor: pointer;
            gap: 12px;
            user-select: none;
            color: #1e293b;
        }

        .faq-q i {
            color: var(--primary);
            transition: transform .3s;
            font-size: .9rem;
        }

        .faq-item.open .faq-q i {
            transform: rotate(180deg);
        }

        .faq-a {
            max-height: 0;
            overflow: hidden;
            transition: max-height .35s ease;
        }

        .faq-a-inner {
            padding: 0 24px 20px;
            color: var(--text-weak);
            font-size: .92rem;
            line-height: 1.8;
        }

        /* ===== CTA ===== */
        .cta-band {
            border-radius: var(--radius-xl);
            background: linear-gradient(135deg, #4f46e5, #7c3aed, #06b6d4);
            padding: 48px 40px;
            position: relative;
            overflow: hidden;
            color: #fff;
        }

        .cta-band::before {
            content: '';
            position: absolute;
            inset: 0;
            background-image: url('/assets/images/backpic/back-1.png');
            background-size: cover;
            background-position: center;
            opacity: .12;
        }

        .cta-band .cta-inner {
            position: relative;
            z-index: 2;
            display: flex;
            align-items: center;
            justify-content: space-between;
            gap: 30px;
            flex-wrap: wrap;
        }

        .cta-title {
            font-size: 1.6rem;
            font-weight: 800;
            margin-bottom: 8px;
        }

        .cta-desc {
            font-size: .95rem;
            opacity: .85;
            max-width: 520px;
        }

        /* ===== 页脚 ===== */
        .footer {
            background: #0f172a;
            color: #94a3b8;
            padding: 56px 0 28px;
            margin-top: 0;
        }

        .footer-brand {
            display: flex;
            align-items: center;
            gap: 12px;
            color: #fff;
            font-weight: 700;
            font-size: 1.15rem;
            margin-bottom: 14px;
        }

        .footer-desc {
            font-size: .9rem;
            line-height: 1.8;
            margin-top: 12px;
        }

        .footer-link-title {
            color: #fff;
            font-size: .95rem;
            font-weight: 600;
            margin-bottom: 14px;
        }

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

        .footer-links a {
            font-size: .865rem;
            color: #94a3b8;
            display: inline-flex;
            align-items: center;
            gap: 6px;
            transition: color .2s;
        }

        .footer-links a:hover {
            color: #a5b4fc;
        }

        .footer-bottom {
            border-top: 1px solid rgba(255, 255, 255, .08);
            margin-top: 36px;
            padding-top: 24px;
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 10px;
            font-size: .82rem;
        }

        @media (max-width: 1023px) {
            .main-wrapper {
                margin-left: 0;
            }
            .tech-grid {
                grid-template-columns: repeat(2, 1fr);
            }
            .hero-stats {
                grid-template-columns: repeat(2, 1fr);
            }
            .cta-band .cta-inner {
                flex-direction: column;
                text-align: center;
            }
        }

        @media (max-width: 640px) {
            .section-pad {
                padding: 52px 0;
            }
            .category-hero {
                padding: 56px 0 52px;
            }
            .hero-stats {
                grid-template-columns: 1fr 1fr;
                gap: 16px;
                margin-top: 32px;
                padding-top: 28px;
            }
            .stat-num {
                font-size: 1.5rem;
            }
            .tech-grid {
                grid-template-columns: 1fr 1fr;
                gap: 14px;
            }
            .tech-panel {
                padding: 32px 24px;
            }
            .deep-block {
                padding: 28px 22px;
            }
            .cta-band {
                padding: 36px 24px;
            }
            .container-page {
                padding-left: 1rem;
                padding-right: 1rem;
            }
        }

        @media (max-width: 480px) {
            .hero-stats {
                grid-template-columns: 1fr 1fr;
            }
            .tech-grid {
                grid-template-columns: 1fr;
            }
            .footer-bottom {
                flex-direction: column;
                align-items: center;
                text-align: center;
            }
        }

        @media (min-width: 1024px) {
            .mobile-header {
                display: none;
            }
            .sidebar-nav {
                transform: translateX(0);
            }
        }

/* roulang page: category3 */
:root {
        --primary: #0f1c3d;
        --accent: #2563eb;
        --accent-2: #06b6d4;
        --text-main: #1e293b;
        --text-muted: #64748b;
        --border: #e2e8f0;
        --bg-light: #f8fafc;
        --radius: 16px;
        --radius-sm: 10px;
        --shadow: 0 4px 24px rgba(15, 28, 61, 0.08);
        --shadow-lg: 0 12px 40px rgba(15, 28, 61, 0.14);
        --transition: all 0.25s ease;
    }

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

    html {
        scroll-behavior: smooth;
    }

    body {
        font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
        background: #f4f6fb;
        color: var(--text-main);
        line-height: 1.7;
        font-size: 16px;
        -webkit-font-smoothing: antialiased;
    }

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

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

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

    input,
    textarea {
        font-family: inherit;
    }

    .container {
        width: 100%;
        max-width: 1240px;
        margin-left: auto;
        margin-right: auto;
        padding-left: 1.5rem;
        padding-right: 1.5rem;
    }

    /* ===== 左侧 App Shell 导航 ===== */
    .sidebar {
        position: fixed;
        top: 0;
        left: 0;
        width: 258px;
        height: 100vh;
        background: linear-gradient(180deg, #0d1b34 0%, #0a1525 100%);
        display: flex;
        flex-direction: column;
        padding: 28px 20px;
        z-index: 50;
        border-right: 1px solid rgba(255, 255, 255, 0.06);
    }

    .sidebar-brand {
        display: flex;
        align-items: center;
        gap: 12px;
        padding: 4px 6px 22px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.08);
        margin-bottom: 28px;
        color: #fff;
        font-size: 1.05rem;
        font-weight: 700;
        letter-spacing: 0.3px;
    }

    .brand-icon {
        width: 38px;
        height: 38px;
        background: linear-gradient(135deg, #2563eb, #06b6d4);
        border-radius: 12px;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 0.95rem;
        color: #fff;
        box-shadow: 0 4px 16px rgba(37, 99, 235, 0.4);
        flex-shrink: 0;
    }

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

    .sidebar-link {
        display: flex;
        align-items: center;
        gap: 12px;
        padding: 12px 16px;
        border-radius: 12px;
        color: rgba(255, 255, 255, 0.72);
        font-size: 0.94rem;
        font-weight: 500;
        transition: var(--transition);
        border: 1px solid transparent;
    }

    .sidebar-link .link-icon {
        width: 22px;
        text-align: center;
        font-size: 1rem;
        opacity: 0.85;
    }

    .sidebar-link:hover {
        background: rgba(255, 255, 255, 0.08);
        color: #fff;
        transform: translateX(3px);
    }

    .sidebar-link:focus-visible {
        outline: 2px solid var(--accent-2);
        outline-offset: 2px;
    }

    .sidebar-link.active {
        background: linear-gradient(135deg, rgba(37, 99, 235, 0.25), rgba(6, 182, 212, 0.18));
        color: #fff;
        border-color: rgba(6, 182, 212, 0.35);
        box-shadow: inset 0 0 20px rgba(6, 182, 212, 0.06);
    }

    .sidebar-foot {
        display: flex;
        align-items: center;
        gap: 10px;
        padding: 16px 12px;
        background: rgba(255, 255, 255, 0.04);
        border-radius: 12px;
        color: rgba(255, 255, 255, 0.6);
        font-size: 0.82rem;
        margin-top: 24px;
    }

    .status-dot {
        width: 8px;
        height: 8px;
        border-radius: 50%;
        background: #22c55e;
        box-shadow: 0 0 10px rgba(34, 197, 94, 0.6);
        flex-shrink: 0;
    }

    /* ===== 主内容区 ===== */
    .main-area {
        margin-left: 258px;
        min-height: 100vh;
        display: flex;
        flex-direction: column;
    }

    main {
        flex: 1;
    }

    /* ===== 移动端顶部导航 ===== */
    .mobile-header {
        display: none;
        position: sticky;
        top: 0;
        z-index: 100;
        background: rgba(15, 28, 61, 0.95);
        backdrop-filter: blur(12px);
        padding: 14px 20px;
        align-items: center;
        justify-content: space-between;
        box-shadow: 0 4px 20px rgba(15, 28, 61, 0.2);
    }

    .mobile-header .brand-text {
        font-size: 1.05rem;
        font-weight: 700;
        color: #fff;
        display: flex;
        align-items: center;
        gap: 10px;
    }

    .burger-btn {
        width: 42px;
        height: 42px;
        border-radius: 10px;
        display: flex;
        align-items: center;
        justify-content: center;
        background: rgba(255, 255, 255, 0.08);
        color: #fff;
        font-size: 1.1rem;
        transition: var(--transition);
    }

    .burger-btn:hover {
        background: rgba(255, 255, 255, 0.16);
    }

    .drawer-overlay {
        display: none;
        position: fixed;
        inset: 0;
        background: rgba(10, 18, 32, 0.6);
        z-index: 200;
        backdrop-filter: blur(2px);
    }

    .drawer-overlay.open {
        display: block;
    }

    .mobile-drawer {
        position: fixed;
        top: 0;
        right: -300px;
        width: 280px;
        height: 100vh;
        background: #0d1b34;
        z-index: 210;
        padding: 22px 20px;
        display: flex;
        flex-direction: column;
        transition: right 0.3s ease;
        border-left: 1px solid rgba(255, 255, 255, 0.06);
    }

    .mobile-drawer.open {
        right: 0;
    }

    .drawer-header {
        display: flex;
        align-items: center;
        justify-content: space-between;
        margin-bottom: 26px;
        padding-bottom: 18px;
        border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    }

    .drawer-header .brand-text {
        color: #fff;
        font-weight: 700;
        font-size: 1rem;
    }

    .drawer-close {
        width: 36px;
        height: 36px;
        border-radius: 10px;
        background: rgba(255, 255, 255, 0.08);
        color: #fff;
        display: flex;
        align-items: center;
        justify-content: center;
        transition: var(--transition);
    }

    .drawer-close:hover {
        background: rgba(255, 255, 255, 0.16);
    }

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

    .drawer-link {
        padding: 14px 16px;
        border-radius: 12px;
        color: rgba(255, 255, 255, 0.78);
        font-size: 0.95rem;
        font-weight: 500;
        display: flex;
        align-items: center;
        gap: 12px;
        transition: var(--transition);
    }

    .drawer-link:hover {
        background: rgba(255, 255, 255, 0.08);
        color: #fff;
    }

    .drawer-link.active {
        background: rgba(37, 99, 235, 0.22);
        color: #fff;
        border: 1px solid rgba(6, 182, 212, 0.25);
    }

    /* ===== Hero Banner ===== */
    .hero-banner {
        position: relative;
        padding: 96px 0 84px;
        background-image: url('/assets/images/backpic/back-2.png');
        background-size: cover;
        background-position: center;
    }

    .hero-banner::before {
        content: "";
        position: absolute;
        inset: 0;
        background: linear-gradient(135deg, rgba(10, 20, 40, 0.92) 0%, rgba(10, 20, 40, 0.78) 55%, rgba(6, 40, 70, 0.65) 100%);
    }

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

    .hero-badge {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        padding: 8px 18px;
        border-radius: 999px;
        background: rgba(6, 182, 212, 0.15);
        border: 1px solid rgba(6, 182, 212, 0.35);
        color: #7dd3fc;
        font-size: 0.82rem;
        font-weight: 600;
        letter-spacing: 0.5px;
        margin-bottom: 22px;
    }

    .hero-banner h1 {
        font-size: clamp(2.1rem, 4vw, 3.2rem);
        font-weight: 800;
        line-height: 1.2;
        color: #fff;
        letter-spacing: -0.5px;
        margin-bottom: 18px;
        max-width: 680px;
    }

    .hero-banner .hero-sub {
        color: rgba(255, 255, 255, 0.78);
        font-size: 1.05rem;
        max-width: 620px;
        line-height: 1.8;
        margin-bottom: 36px;
    }

    .hero-stats {
        display: flex;
        flex-wrap: wrap;
        gap: 28px;
        margin-top: 16px;
    }

    .hero-stat {
        display: flex;
        flex-direction: column;
        gap: 4px;
    }

    .hero-stat .num {
        font-size: 1.6rem;
        font-weight: 800;
        color: #fff;
    }

    .hero-stat .label {
        font-size: 0.82rem;
        color: rgba(255, 255, 255, 0.6);
    }

    /* ===== 通用板块 ===== */
    .section {
        padding: 72px 0;
    }

    .section-alt {
        background: #fff;
        padding: 72px 0;
    }

    .section-head {
        margin-bottom: 44px;
        max-width: 720px;
    }

    .section-head .eyebrow {
        color: var(--accent);
        font-size: 0.82rem;
        font-weight: 700;
        letter-spacing: 1px;
        text-transform: uppercase;
        margin-bottom: 10px;
        display: inline-flex;
        align-items: center;
        gap: 8px;
    }

    .section-head h2 {
        font-size: clamp(1.6rem, 3vw, 2.3rem);
        font-weight: 800;
        line-height: 1.25;
        color: #0f172a;
        letter-spacing: -0.3px;
    }

    .section-head p {
        color: var(--text-muted);
        margin-top: 12px;
        font-size: 1rem;
        line-height: 1.7;
    }

    /* ===== 卡片 ===== */
    .feature-card {
        background: #fff;
        border: 1px solid var(--border);
        border-radius: var(--radius);
        padding: 28px 24px;
        height: 100%;
        transition: var(--transition);
        position: relative;
        overflow: hidden;
    }

    .feature-card::after {
        content: "";
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 3px;
        background: linear-gradient(90deg, var(--accent), var(--accent-2));
        transform: scaleX(0);
        transform-origin: left;
        transition: transform 0.35s ease;
    }

    .feature-card:hover {
        transform: translateY(-4px);
        box-shadow: var(--shadow-lg);
        border-color: rgba(37, 99, 235, 0.3);
    }

    .feature-card:hover::after {
        transform: scaleX(1);
    }

    .feature-icon {
        width: 48px;
        height: 48px;
        border-radius: 14px;
        display: flex;
        align-items: center;
        justify-content: center;
        font-size: 1.2rem;
        color: #fff;
        margin-bottom: 18px;
        background: linear-gradient(135deg, #2563eb, #06b6d4);
        box-shadow: 0 6px 18px rgba(37, 99, 235, 0.25);
    }

    .feature-card h3 {
        font-size: 1.05rem;
        font-weight: 700;
        color: #0f172a;
        margin-bottom: 8px;
    }

    .feature-card p {
        color: var(--text-muted);
        font-size: 0.92rem;
        line-height: 1.7;
        margin-bottom: 10px;
    }

    .feature-card .tip {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        font-size: 0.82rem;
        color: var(--accent);
        font-weight: 600;
        background: rgba(37, 99, 235, 0.07);
        padding: 4px 12px;
        border-radius: 999px;
    }

    /* ===== 深色步骤面板 ===== */
    .steps-panel {
        background: linear-gradient(135deg, #0d1b34, #101f3f);
        border-radius: 28px;
        padding: 48px;
        position: relative;
        overflow: hidden;
    }

    .steps-panel::before {
        content: "";
        position: absolute;
        top: -100px;
        right: -80px;
        width: 260px;
        height: 260px;
        background: radial-gradient(circle, rgba(6, 182, 212, 0.18), transparent 70%);
    }

    .steps-panel .section-head h2 {
        color: #fff;
    }

    .steps-panel .section-head p {
        color: rgba(255, 255, 255, 0.6);
    }

    .steps-panel .section-head .eyebrow {
        color: #7dd3fc;
    }

    .steps-grid {
        display: grid;
        grid-template-columns: repeat(4, 1fr);
        gap: 20px;
    }

    .step-card {
        background: rgba(255, 255, 255, 0.05);
        border: 1px solid rgba(255, 255, 255, 0.08);
        border-radius: 18px;
        padding: 26px 22px;
        position: relative;
        transition: var(--transition);
        backdrop-filter: blur(4px);
    }

    .step-card:hover {
        background: rgba(255, 255, 255, 0.09);
        border-color: rgba(6, 182, 212, 0.4);
        transform: translateY(-4px);
    }

    .step-num {
        font-size: 1.9rem;
        font-weight: 800;
        color: transparent;
        -webkit-text-stroke: 1.5px #38bdf8;
        margin-bottom: 14px;
        line-height: 1;
    }

    .step-card h3 {
        color: #fff;
        font-size: 1rem;
        font-weight: 700;
        margin-bottom: 8px;
    }

    .step-card p {
        color: rgba(255, 255, 255, 0.6);
        font-size: 0.88rem;
        line-height: 1.65;
    }

    /* ===== 版本卡 ===== */
    .version-card {
        background: #fff;
        border: 1px solid var(--border);
        border-radius: var(--radius);
        overflow: hidden;
        height: 100%;
        transition: var(--transition);
        display: flex;
        flex-direction: column;
    }

    .version-card:hover {
        box-shadow: var(--shadow-lg);
        transform: translateY(-5px);
        border-color: rgba(37, 99, 235, 0.3);
    }

    .version-card .ver-cover {
        height: 140px;
        background-size: cover;
        background-position: center;
        position: relative;
    }

    .version-card .ver-cover::after {
        content: "";
        position: absolute;
        inset: 0;
        background: linear-gradient(180deg, rgba(15, 28, 61, 0.08), rgba(15, 28, 61, 0.55));
    }

    .version-card .ver-body {
        padding: 26px 24px 28px;
        flex: 1;
        display: flex;
        flex-direction: column;
    }

    .version-card .ver-tag {
        position: absolute;
        top: 14px;
        left: 14px;
        z-index: 2;
        padding: 5px 14px;
        border-radius: 999px;
        background: rgba(15, 28, 61, 0.75);
        color: #fff;
        font-size: 0.78rem;
        font-weight: 600;
        backdrop-filter: blur(4px);
    }

    .version-card h3 {
        font-size: 1.15rem;
        font-weight: 700;
        color: #0f172a;
        margin-bottom: 12px;
    }

    .version-card ul {
        list-style: none;
        margin-bottom: 20px;
        flex: 1;
    }

    .version-card ul li {
        display: flex;
        align-items: center;
        gap: 10px;
        color: var(--text-muted);
        font-size: 0.88rem;
        padding: 5px 0;
    }

    .version-card ul li i {
        color: #10b981;
        font-size: 0.75rem;
        width: 16px;
        text-align: center;
    }

    /* ===== 按钮 ===== */
    .btn {
        display: inline-flex;
        align-items: center;
        justify-content: center;
        gap: 8px;
        padding: 12px 28px;
        border-radius: 12px;
        font-weight: 600;
        font-size: 0.92rem;
        transition: var(--transition);
        border: 1px solid transparent;
        cursor: pointer;
        line-height: 1.4;
    }

    .btn-primary {
        background: linear-gradient(135deg, #2563eb, #1d4ed8);
        color: #fff;
        box-shadow: 0 6px 20px rgba(37, 99, 235, 0.35);
    }

    .btn-primary:hover {
        transform: translateY(-2px);
        box-shadow: 0 10px 28px rgba(37, 99, 235, 0.4);
    }

    .btn-primary:active {
        transform: translateY(0);
        box-shadow: 0 4px 14px rgba(37, 99, 235, 0.3);
    }

    .btn-outline {
        background: transparent;
        color: #fff;
        border-color: rgba(255, 255, 255, 0.4);
    }

    .btn-outline:hover {
        border-color: #fff;
        background: rgba(255, 255, 255, 0.08);
    }

    .btn-dark {
        background: #0f1c3d;
        color: #fff;
    }

    .btn-dark:hover {
        background: #1b2a4d;
        transform: translateY(-2px);
    }

    .btn:focus-visible {
        outline: 3px solid rgba(37, 99, 235, 0.4);
        outline-offset: 2px;
    }

    .btn-lg {
        padding: 15px 36px;
        font-size: 1rem;
        border-radius: 14px;
    }

    /* ===== 安全 CTA ===== */
    .security-band {
        background: linear-gradient(120deg, #0c1f3d 0%, #132a52 50%, #0e3d5c 100%);
        border-radius: 28px;
        padding: 56px 48px;
        position: relative;
        overflow: hidden;
    }

    .security-band::after {
        content: "";
        position: absolute;
        bottom: -60px;
        right: -40px;
        width: 220px;
        height: 220px;
        border-radius: 50%;
        background: radial-gradient(circle, rgba(6, 182, 212, 0.25), transparent 70%);
    }

    .security-band h2 {
        color: #fff;
        font-size: clamp(1.4rem, 3vw, 2rem);
        font-weight: 800;
        margin-bottom: 14px;
    }

    .security-band p {
        color: rgba(255, 255, 255, 0.7);
        max-width: 660px;
        line-height: 1.7;
        margin-bottom: 28px;
    }

    /* ===== FAQ ===== */
    .faq-list {
        display: flex;
        flex-direction: column;
        gap: 14px;
    }

    .faq-item {
        background: #fff;
        border: 1px solid var(--border);
        border-radius: 16px;
        overflow: hidden;
        transition: var(--transition);
    }

    .faq-item:hover {
        border-color: rgba(37, 99, 235, 0.3);
        box-shadow: 0 4px 16px rgba(15, 28, 61, 0.06);
    }

    .faq-item summary {
        display: flex;
        align-items: center;
        justify-content: space-between;
        gap: 16px;
        padding: 22px 24px;
        cursor: pointer;
        font-weight: 600;
        font-size: 0.98rem;
        color: #0f172a;
        list-style: none;
    }

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

    .faq-item summary i {
        color: var(--accent);
        font-size: 0.85rem;
        transition: transform 0.3s ease;
        flex-shrink: 0;
    }

    .faq-item details[open] summary i {
        transform: rotate(180deg);
    }

    .faq-item details[open] {
        border-color: rgba(37, 99, 235, 0.3);
    }

    .faq-item .faq-a {
        padding: 0 24px 22px;
        color: var(--text-muted);
        font-size: 0.92rem;
        line-height: 1.75;
        border-top: 1px dashed var(--border);
        padding-top: 16px;
    }

    /* ===== 资讯卡片 ===== */
    .news-card {
        background: #fff;
        border: 1px solid var(--border);
        border-radius: var(--radius);
        overflow: hidden;
        transition: var(--transition);
        height: 100%;
        display: flex;
        flex-direction: column;
    }

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

    .news-card .news-cover {
        height: 170px;
        background-size: cover;
        background-position: center;
        position: relative;
    }

    .news-card .news-cover::before {
        content: "";
        position: absolute;
        inset: 0;
        background: linear-gradient(180deg, transparent, rgba(15, 28, 61, 0.05));
    }

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

    .news-card .news-tag {
        align-self: flex-start;
        padding: 4px 12px;
        border-radius: 999px;
        background: rgba(37, 99, 235, 0.08);
        color: var(--accent);
        font-size: 0.78rem;
        font-weight: 600;
        margin-bottom: 14px;
    }

    .news-card h3 {
        font-size: 1.06rem;
        font-weight: 700;
        color: #0f172a;
        line-height: 1.45;
        margin-bottom: 10px;
    }

    .news-card p {
        color: var(--text-muted);
        font-size: 0.9rem;
        line-height: 1.65;
        margin-bottom: 18px;
        flex: 1;
    }

    .news-card .news-link {
        display: inline-flex;
        align-items: center;
        gap: 6px;
        color: var(--accent);
        font-size: 0.88rem;
        font-weight: 600;
    }

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

    /* ===== Footer ===== */
    .footer {
        background: #0d1730;
        color: rgba(255, 255, 255, 0.72);
        padding: 60px 0 32px;
        border-top: 1px solid rgba(255, 255, 255, 0.06);
    }

    .footer-brand {
        display: flex;
        align-items: center;
        gap: 12px;
        margin-bottom: 16px;
    }

    .footer-brand .brand-icon {
        width: 36px;
        height: 36px;
        border-radius: 10px;
        background: linear-gradient(135deg, #2563eb, #06b6d4);
        display: flex;
        align-items: center;
        justify-content: center;
        color: #fff;
        font-size: 0.9rem;
        flex-shrink: 0;
    }

    .footer-brand span {
        color: #fff;
        font-size: 1.05rem;
        font-weight: 700;
    }

    .footer-desc {
        color: rgba(255, 255, 255, 0.55);
        font-size: 0.88rem;
        line-height: 1.75;
        max-width: 320px;
    }

    .footer-link-title {
        color: #fff;
        font-size: 0.95rem;
        font-weight: 700;
        margin-bottom: 18px;
    }

    .footer-links {
        display: flex;
        flex-direction: column;
        gap: 10px;
    }

    .footer-links a {
        display: inline-flex;
        align-items: center;
        gap: 8px;
        color: rgba(255, 255, 255, 0.6);
        font-size: 0.88rem;
        transition: var(--transition);
    }

    .footer-links a i {
        font-size: 0.7rem;
        color: rgba(255, 255, 255, 0.35);
        transition: var(--transition);
    }

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

    .footer-links a:hover i {
        color: #7dd3fc;
    }

    .footer-bottom {
        border-top: 1px solid rgba(255, 255, 255, 0.06);
        margin-top: 40px;
        padding-top: 24px;
        display: flex;
        flex-wrap: wrap;
        align-items: center;
        justify-content: space-between;
        gap: 12px;
        font-size: 0.8rem;
        color: rgba(255, 255, 255, 0.4);
    }

    .footer-bottom i {
        color: #7dd3fc;
        margin-right: 4px;
    }

    /* ===== 响应式 ===== */
    @media (max-width: 1024px) {
        .sidebar {
            display: none;
        }

        .main-area {
            margin-left: 0;
        }

        .mobile-header {
            display: flex;
        }

        .hero-banner {
            padding: 72px 0 64px;
        }

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

        .section {
            padding: 56px 0;
        }

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

        .steps-panel {
            padding: 36px 28px;
        }
    }

    @media (max-width: 768px) {
        .hero-stats {
            gap: 20px;
        }

        .hero-stat .num {
            font-size: 1.3rem;
        }

        .section-head {
            margin-bottom: 32px;
        }

        .security-band {
            padding: 40px 24px;
            border-radius: 20px;
        }

        .footer {
            padding: 44px 0 24px;
        }
    }

    @media (max-width: 520px) {
        .hero-banner h1 {
            font-size: 1.7rem;
        }

        .hero-banner .hero-sub {
            font-size: 0.94rem;
        }

        .hero-banner {
            padding: 56px 0 48px;
        }

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

        .steps-panel {
            padding: 28px 20px;
            border-radius: 18px;
        }

        .feature-card {
            padding: 22px 18px;
        }

        .section {
            padding: 44px 0;
        }

        .section-alt {
            padding: 44px 0;
        }

        .version-card .ver-body {
            padding: 20px;
        }

        .footer-bottom {
            flex-direction: column;
            text-align: center;
        }
    }