/* roulang page: index */
:root {
  --primary: #F97316;
  --primary-dark: #EA580C;
  --secondary: #7C3AED;
  --bg: #F6F7FB;
  --card-bg: #FFFFFF;
  --dark: #14161C;
  --text: #1A1D23;
  --body-text: #555B66;
  --muted: #8B929E;
  --border: #F0F2F5;
  --divider: #E9ECF0;
  --success: #10B981;
  --radius-sm: 10px;
  --radius-card: 16px;
  --radius-lg: 20px;
  --radius-xl: 24px;
  --shadow: 0 2px 8px rgba(20,22,28,0.06);
  --shadow-hover: 0 12px 28px rgba(20,22,28,0.12);
  --font-cn: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-en: Inter, "Roboto", sans-serif;
  --transition: all 0.25s ease;
}

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

html { scroll-behavior: smooth; }

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

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

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

button { font-family: var(--font-cn); cursor: pointer; }
input, textarea, select { font-family: var(--font-cn); }

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

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

/* ========== 左侧导航 ========== */
.app-sidebar {
  position: fixed;
  top: 0; left: 0;
  width: 240px;
  height: 100vh;
  background: var(--card-bg);
  border-right: 1px solid var(--divider);
  display: flex;
  flex-direction: column;
  z-index: 100;
  padding: 24px 16px;
}

.sidebar-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 8px 12px 24px;
  border-bottom: 1px solid var(--divider);
  margin-bottom: 20px;
}

.logo-mark {
  width: 40px;
  height: 40px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  font-size: 20px;
  font-weight: 800;
  font-family: var(--font-en);
  flex-shrink: 0;
}

.logo-text {
  font-size: 18px;
  font-weight: 800;
  color: var(--text);
  letter-spacing: 0.5px;
}

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

.sidebar-nav {
  display: flex;
  flex-direction: column;
  gap: 4px;
  flex: 1;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  color: var(--body-text);
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  transition: var(--transition);
  position: relative;
  min-height: 44px;
}

.nav-item i {
  width: 20px;
  text-align: center;
  font-size: 16px;
  color: var(--muted);
  transition: var(--transition);
}

.nav-item:hover {
  background: rgba(249, 115, 22, 0.08);
  color: var(--text);
}

.nav-item:hover i { color: var(--primary); }

.nav-item.active {
  background: rgba(249, 115, 22, 0.1);
  color: var(--text);
  font-weight: 700;
}

.nav-item.active::before {
  content: '';
  position: absolute;
  left: 0; top: 50%;
  transform: translateY(-50%);
  width: 3px;
  height: 20px;
  border-radius: 3px;
  background: var(--primary);
}

.nav-item.active i { color: var(--primary); }

.sidebar-footer {
  padding: 16px 12px 8px;
  border-top: 1px solid var(--divider);
  font-size: 13px;
  color: var(--muted);
  text-align: center;
  font-family: var(--font-en);
}

/* ========== 移动端导航 ========== */
.mobile-topbar {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 64px;
  background: var(--card-bg);
  border-bottom: 1px solid var(--divider);
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  z-index: 120;
  box-shadow: 0 2px 8px rgba(20,22,28,0.04);
}

.mobile-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 18px;
  font-weight: 800;
  color: var(--text);
  text-decoration: none;
}

.hamburger-btn {
  width: 44px;
  height: 44px;
  border: none;
  background: transparent;
  border-radius: var(--radius-sm);
  font-size: 22px;
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition);
}

.hamburger-btn:hover { background: rgba(249, 115, 22, 0.08); color: var(--primary); }

.drawer-overlay {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: rgba(20,22,28,0.5);
  z-index: 130;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.drawer-overlay.show { opacity: 1; }

.mobile-drawer {
  position: fixed;
  top: 0; left: 0;
  width: 280px;
  height: 100vh;
  background: var(--card-bg);
  z-index: 140;
  transform: translateX(-100%);
  transition: transform 0.3s ease;
  display: flex;
  flex-direction: column;
  padding: 20px;
  box-shadow: 4px 0 20px rgba(20,22,28,0.15);
}

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

.drawer-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--divider);
  margin-bottom: 20px;
}

.drawer-close {
  width: 40px;
  height: 40px;
  border: none;
  background: var(--bg);
  border-radius: var(--radius-sm);
  font-size: 18px;
  color: var(--text);
  display: flex;
  align-items: center;
  justify-content: center;
}

.drawer-nav {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.drawer-nav .nav-item {
  font-size: 16px;
  padding: 14px 16px;
}

/* ========== 主内容区 ========== */
.main-wrap {
  margin-left: 240px;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

.main-content { flex: 1; }

/* ========== Hero ========== */
.hero-section {
  background: var(--dark);
  color: #fff;
  padding: 96px 24px;
  position: relative;
  overflow: hidden;
}

.hero-section::before {
  content: '';
  position: absolute;
  top: -80px; right: -80px;
  width: 360px;
  height: 360px;
  background: radial-gradient(circle, rgba(249,115,22,0.3) 0%, transparent 70%);
  pointer-events: none;
}

.hero-section .row {
  position: relative;
  z-index: 1;
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
}

.hero-content {
  padding-right: 40px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(249,115,22,0.2);
  border: 1px solid rgba(249,115,22,0.4);
  color: #FFB380;
  font-size: 13px;
  font-weight: 600;
  padding: 4px 14px;
  border-radius: 999px;
  margin-bottom: 20px;
}

.hero-section h1 {
  font-size: 48px;
  line-height: 1.25;
  font-weight: 800;
  color: #fff;
  margin-bottom: 16px;
  letter-spacing: 0.5px;
}

.hero-section .hero-sub {
  font-size: 16px;
  line-height: 1.8;
  color: rgba(255,255,255,0.75);
  margin-bottom: 32px;
  max-width: 480px;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: var(--radius-btn);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
  transition: var(--transition);
  border: 2px solid transparent;
  min-height: 44px;
}

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

.btn-primary:hover {
  background: var(--primary-dark);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(249,115,22,0.3);
}

.btn-ghost {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,0.5);
}

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

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

.hero-media img {
  border-radius: var(--radius-lg);
  width: 100%;
  height: auto;
  aspect-ratio: 4/3;
  object-fit: cover;
  box-shadow: 0 16px 40px rgba(0,0,0,0.3);
}

/* ========== 信任背书条 ========== */
.trust-bar {
  background: var(--bg);
  border-bottom: 1px solid var(--divider);
  padding: 32px 24px;
}

.trust-bar .row {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  justify-content: center;
  gap: 60px;
  flex-wrap: wrap;
}

.trust-item {
  text-align: center;
  padding: 0 20px;
}

.trust-value {
  display: block;
  font-size: 28px;
  font-weight: 800;
  color: var(--text);
  font-family: var(--font-en);
  margin-bottom: 4px;
}

.trust-label {
  font-size: 14px;
  color: var(--muted);
}

/* ========== 故事/理念区 ========== */
.story-section {
  padding: 96px 24px;
  background: var(--card-bg);
}

.story-section .row {
  max-width: 1200px;
  margin: 0 auto;
  display: flex;
  align-items: center;
}

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

.story-content p:last-child { margin-bottom: 0; }

.story-media img {
  border-radius: var(--radius-lg);
  width: 100%;
  aspect-ratio: 16/10;
  object-fit: cover;
}

/* ========== 精选内容区 ========== */
.latest-section {
  padding: 96px 24px;
  background: var(--bg);
}

.latest-section .container {
  max-width: 1200px;
  margin: 0 auto;
}

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

.section-head h2 {
  font-size: 34px;
  line-height: 1.3;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 8px;
}

.section-head .section-desc {
  font-size: 15px;
  color: var(--muted);
}

.content-card {
  background: var(--card-bg);
  border-radius: var(--radius-card);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: var(--transition);
  height: 100%;
  display: flex;
  flex-direction: column;
}

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

.card-thumb {
  aspect-ratio: 16/9;
  overflow: hidden;
}

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

.content-card:hover .card-thumb img { transform: scale(1.03); }

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

.card-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}

.badge {
  display: inline-block;
  padding: 3px 12px;
  background: rgba(124,58,237,0.1);
  color: var(--secondary);
  font-size: 12px;
  font-weight: 600;
  border-radius: 999px;
}

.card-meta time {
  font-size: 13px;
  color: var(--muted);
  font-family: var(--font-en);
}

.card-body h3 {
  font-size: 22px;
  line-height: 1.4;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 10px;
}

.card-body h3 a {
  color: var(--text);
  text-decoration: none;
}

.card-body h3 a:hover { color: var(--primary); }

.card-body p {
  font-size: 14px;
  line-height: 1.7;
  color: var(--muted);
  margin-bottom: 16px;
  flex: 1;
}

.read-more {
  font-size: 14px;
  font-weight: 600;
  color: var(--primary);
  text-decoration: none;
}

.read-more:hover { color: var(--primary-dark); }

.empty-state {
  border: 2px dashed var(--divider);
  border-radius: var(--radius-card);
  padding: 60px 24px;
  text-align: center;
  color: var(--muted);
}

.empty-state i {
  font-size: 40px;
  color: var(--divider);
  margin-bottom: 12px;
  display: block;
}

.empty-state p { font-size: 15px; }

/* ========== 亮点区 ========== */
.features-section {
  padding: 96px 24px;
  background: var(--card-bg);
}

.features-section .container {
  max-width: 1200px;
  margin: 0 auto;
}

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

.feature-card {
  background: var(--bg);
  border-radius: var(--radius-card);
  padding: 32px;
  display: flex;
  gap: 20px;
  transition: var(--transition);
  border: 1px solid var(--border);
}

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

.feature-icon {
  width: 52px;
  height: 52px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
}

.feature-icon.orange {
  background: rgba(249,115,22,0.12);
  color: var(--primary);
}

.feature-icon.purple {
  background: rgba(124,58,237,0.12);
  color: var(--secondary);
}

.feature-card h3 {
  font-size: 22px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 6px;
}

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

.feature-wide {
  grid-column: span 1;
  align-items: center;
}

.feature-wide .feature-text {
  max-width: 520px;
}

.feature-mini {
  background: var(--dark);
  border-color: var(--dark);
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  min-height: 220px;
}

.feature-mini .version-number {
  font-size: 44px;
  font-weight: 800;
  color: #fff;
  font-family: var(--font-en);
  line-height: 1.2;
}

.feature-mini .version-label {
  font-size: 14px;
  color: rgba(255,255,255,0.6);
  margin-top: 4px;
}

/* ========== FAQ ========== */
.faq-section {
  padding: 96px 24px;
  background: var(--bg);
}

.faq-section .container {
  max-width: 860px;
  margin: 0 auto;
}

.faq-accordion {
  list-style: none;
  background: transparent;
  border: none;
}

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

.faq-accordion .accordion-item.is-active {
  box-shadow: var(--shadow);
  border-color: rgba(249,115,22,0.2);
}

.faq-accordion .accordion-title {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 18px 20px;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  background: var(--card-bg);
  border: none;
  min-height: 44px;
}

.faq-accordion .accordion-title::before {
  content: '问';
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 28px;
  height: 28px;
  border-radius: 8px;
  background: rgba(249,115,22,0.1);
  color: var(--primary);
  font-size: 13px;
  font-weight: 700;
  flex-shrink: 0;
}

.faq-accordion .accordion-title::after {
  content: '\f078';
  font-family: 'Font Awesome 6 Free';
  font-weight: 900;
  font-size: 14px;
  color: var(--muted);
  margin-left: auto;
  transition: var(--transition);
}

.faq-accordion .accordion-item.is-active > .accordion-title::after {
  transform: rotate(180deg);
  color: var(--primary);
}

.faq-accordion .accordion-content {
  padding: 0 20px 20px;
  background: var(--card-bg);
  border: none;
  color: var(--body-text);
  font-size: 15px;
  line-height: 1.8;
}

.faq-accordion .accordion-content p {
  padding-left: 42px;
  margin: 0;
}

/* ========== CTA ========== */
.cta-section {
  padding: 96px 24px;
  background: var(--card-bg);
}

.cta-section .container {
  max-width: 1200px;
  margin: 0 auto;
}

.cta-box {
  background: var(--dark);
  border-radius: var(--radius-xl);
  padding: 64px 48px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-box::before {
  content: '';
  position: absolute;
  top: -60px; left: -60px;
  width: 220px;
  height: 220px;
  background: radial-gradient(circle, rgba(249,115,22,0.25) 0%, transparent 70%);
  pointer-events: none;
}

.cta-box::after {
  content: '';
  position: absolute;
  bottom: -60px; right: -60px;
  width: 240px;
  height: 240px;
  background: radial-gradient(circle, rgba(124,58,237,0.15) 0%, transparent 70%);
  pointer-events: none;
}

.cta-box h2 {
  font-size: 28px;
  font-weight: 800;
  color: #fff;
  margin-bottom: 8px;
  position: relative;
  z-index: 1;
}

.cta-box p {
  font-size: 14px;
  color: rgba(255,255,255,0.6);
  margin-bottom: 32px;
  position: relative;
  z-index: 1;
}

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

/* ========== 页脚 ========== */
.site-footer {
  background: var(--dark);
  color: rgba(255,255,255,0.6);
  padding: 64px 24px 24px;
}

.site-footer .container {
  max-width: 1200px;
  margin: 0 auto;
}

.footer-grid {
  display: flex;
  gap: 48px;
  flex-wrap: wrap;
  margin-bottom: 48px;
}

.footer-col { flex: 1; min-width: 200px; }

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

.footer-logo .logo-mark { background: rgba(249,115,22,0.9); }

.footer-logo .logo-text {
  color: #fff;
  font-size: 16px;
}

.footer-desc {
  font-size: 14px;
  line-height: 1.7;
  color: rgba(255,255,255,0.5);
  max-width: 260px;
}

.footer-col h4 {
  font-size: 16px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
}

.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  color: rgba(255,255,255,0.5);
  font-size: 14px;
  text-decoration: none;
  transition: var(--transition);
}

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

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.08);
  padding-top: 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: rgba(255,255,255,0.4);
}

.footer-bottom a { color: rgba(255,255,255,0.4); font-size: 13px; }
.footer-bottom a:hover { color: var(--primary); }

.footer-icp {
  display: inline-flex;
  align-items: center;
  gap: 8px;
}

/* ========== 响应式 ========== */
@media (max-width: 1023px) {
  .app-sidebar {
    width: 88px;
    padding: 20px 12px;
  }
  .logo-text, .nav-item span, .sidebar-footer { display: none; }
  .sidebar-logo { justify-content: center; padding: 8px 12px 20px; }
  .nav-item { justify-content: center; padding: 12px; }
  .nav-item i { font-size: 20px; }
  .main-wrap { margin-left: 88px; }
  .hero-section h1 { font-size: 40px; }
}

@media (max-width: 767px) {
  .app-sidebar { display: none; }
  .mobile-topbar { display: flex; }
  .main-wrap { margin-left: 0; }
  .main-content { padding-top: 64px; }
  .hero-section { padding: 64px 16px; }
  .hero-section .row { flex-direction: column; }
  .hero-content { padding-right: 0; margin-bottom: 32px; text-align: center; }
  .hero-section h1 { font-size: 34px; }
  .hero-section .hero-sub { margin-left: auto; margin-right: auto; }
  .hero-actions { justify-content: center; }
  .trust-bar { padding: 24px 16px; }
  .trust-bar .row { gap: 24px; flex-direction: column; }
  .trust-item { padding: 8px 0; }
  .story-section { padding: 56px 16px; }
  .story-section .row { flex-direction: column-reverse; gap: 24px; }
  .story-media img { aspect-ratio: 4/3; }
  .latest-section { padding: 56px 16px; }
  .section-head h2 { font-size: 26px; }
  .features-section { padding: 56px 16px; }
  .feature-grid { grid-template-columns: 1fr; gap: 16px; }
  .feature-card { padding: 24px; }
  .feature-wide { grid-column: auto; }
  .feature-mini { min-height: 160px; }
  .faq-section { padding: 56px 16px; }
  .cta-section { padding: 56px 16px; }
  .cta-box { padding: 40px 24px; }
  .cta-box h2 { font-size: 24px; }
  .site-footer { padding: 48px 16px 24px; }
  .footer-grid { flex-direction: column; gap: 32px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

@media (max-width: 520px) {
  .hero-section h1 { font-size: 28px; }
  .hero-actions .btn { width: 100%; }
  .btn { padding: 12px 20px; }
  .card-body { padding: 20px; }
  .card-body h3 { font-size: 19px; }
  .feature-card { flex-direction: column; gap: 14px; }
  .feature-card p { font-size: 13px; }
  .faq-accordion .accordion-title { font-size: 15px; padding: 16px; }
  .faq-accordion .accordion-content p { padding-left: 0; }
  .cta-box .btn { width: 100%; }
  .footer-links a { font-size: 15px; }
}

/* roulang page: article */
:root {
    --primary: #F97316;
    --primary-dark: #EA580C;
    --secondary: #7C3AED;
    --bg: #F6F7FB;
    --card: #FFFFFF;
    --dark: #14161C;
    --text: #1A1D23;
    --text-body: #555B66;
    --text-muted: #8B929E;
    --border: #E9ECF0;
    --success: #10B981;
    --radius-card: 16px;
    --radius-btn: 10px;
    --radius-badge: 999px;
    --shadow: 0 2px 8px rgba(20,22,28,0.06);
    --shadow-lg: 0 12px 28px rgba(20,22,28,0.12);
    --font-main: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
    --font-num: Inter, "Roboto", sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    font-family: var(--font-main);
    background: var(--bg);
    color: var(--text);
    line-height: 1.75;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul, ol { list-style: none; }
button { font-family: inherit; border: none; background: none; cursor: pointer; }
input, textarea { font-family: inherit; }

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

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 28px;
    border-radius: var(--radius-btn);
    font-size: 15px;
    font-weight: 600;
    transition: all 0.25s ease;
    min-height: 44px;
    line-height: 1.2;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 20px rgba(249,115,22,0.3); }
.btn-outline { border: 2px solid var(--border); color: var(--text-body); background: transparent; }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); background: rgba(249,115,22,0.05); transform: translateY(-2px); }

/* 左侧导航 */
.app-sidebar {
    position: fixed;
    left: 0; top: 0; bottom: 0;
    width: 240px;
    background: #fff;
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    padding: 32px 16px 24px;
    z-index: 100;
}
.sidebar-logo { display: flex; align-items: center; gap: 12px; padding: 0 8px; margin-bottom: 48px; }
.logo-mark {
    width: 42px; height: 42px;
    background: var(--primary);
    border-radius: 12px;
    display: flex; align-items: center; justify-content: center;
    font-family: var(--font-num); font-weight: 800;
    color: #fff; font-size: 17px;
    letter-spacing: -0.5px;
    flex-shrink: 0;
}
.logo-text { font-size: 18px; font-weight: 800; color: var(--text); letter-spacing: 0.5px; }
.sidebar-nav { display: flex; flex-direction: column; gap: 6px; flex: 1; }
.nav-item {
    display: flex; align-items: center; gap: 14px;
    padding: 13px 16px;
    border-radius: 12px;
    font-size: 15px; font-weight: 500;
    color: var(--text-body);
    transition: all 0.25s ease;
    position: relative;
}
.nav-item i { width: 20px; text-align: center; font-size: 16px; }
.nav-item:hover { background: rgba(249,115,22,0.08); color: var(--primary); }
.nav-item.active { background: rgba(249,115,22,0.1); color: var(--primary); font-weight: 700; }
.nav-item.active::before {
    content: '';
    position: absolute; left: -16px; top: 50%;
    transform: translateY(-50%);
    width: 3px; height: 24px;
    background: var(--primary);
    border-radius: 0 3px 3px 0;
}
.sidebar-bottom {
    padding: 16px 8px 0;
    border-top: 1px solid var(--border);
    font-size: 13px; color: var(--text-muted);
    display: flex; align-items: center; gap: 8px;
}
.sidebar-bottom i { color: var(--success); }

/* 移动端顶部栏 */
.mobile-header {
    display: none;
    position: fixed; top: 0; left: 0; right: 0;
    height: 64px;
    background: #fff;
    border-bottom: 1px solid var(--border);
    z-index: 200;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    box-shadow: 0 2px 8px rgba(20,22,28,0.06);
}
.mobile-logo { display: flex; align-items: center; gap: 10px; }
.mobile-logo .logo-text { font-size: 16px; }
.mobile-hamburger {
    width: 44px; height: 44px;
    border-radius: 10px;
    display: flex; align-items: center; justify-content: center;
    font-size: 20px; color: var(--text);
    transition: background 0.2s;
}
.mobile-hamburger:hover { background: rgba(249,115,22,0.1); }

/* 移动端抽屉 */
.drawer-overlay {
    display: none;
    position: fixed; top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(20,22,28,0.5);
    z-index: 300;
    opacity: 0;
    transition: opacity 0.3s ease;
}
.drawer-overlay.show { opacity: 1; }
.mobile-drawer {
    display: none;
    position: fixed; top: 0; left: 0; bottom: 0;
    width: 280px;
    background: #fff;
    z-index: 400;
    transform: translateX(-100%);
    transition: transform 0.3s ease;
    padding: 24px;
    flex-direction: column;
    box-shadow: 4px 0 24px rgba(20,22,28,0.12);
}
.mobile-drawer.show { transform: translateX(0); }
.drawer-header {
    display: flex; align-items: center; justify-content: space-between;
    margin-bottom: 32px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border);
}
.drawer-logo { display: flex; align-items: center; gap: 10px; }
.drawer-close {
    width: 40px; height: 40px;
    border-radius: 10px;
    display: flex; align-items: center; justify-content: center;
    font-size: 18px; color: var(--text);
    transition: background 0.2s;
}
.drawer-close:hover { background: rgba(249,115,22,0.1); }
.drawer-nav { display: flex; flex-direction: column; gap: 8px; }
.drawer-nav-item {
    display: flex; align-items: center; gap: 14px;
    padding: 14px 16px;
    border-radius: 12px;
    font-size: 16px; font-weight: 500;
    color: var(--text-body);
    transition: all 0.2s ease;
}
.drawer-nav-item:hover { background: rgba(249,115,22,0.08); color: var(--primary); }
.drawer-nav-item.active { background: rgba(249,115,22,0.1); color: var(--primary); font-weight: 700; }
.drawer-nav-item i { width: 20px; text-align: center; }

/* 主内容 */
.main-wrapper { margin-left: 240px; min-height: 100vh; display: flex; flex-direction: column; }
.article-page { flex: 1; padding: 48px 0 72px; }
.article-page .container { max-width: 960px; }

/* 面包屑 */
.breadcrumb { display: flex; align-items: center; gap: 10px; font-size: 14px; color: var(--text-muted); margin-bottom: 28px; }
.breadcrumb a { color: var(--text-body); transition: color 0.2s; }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { font-size: 12px; color: #c0c6cf; }
.breadcrumb .current { color: var(--primary); font-weight: 500; }

/* 文章标题区 */
.article-header {
    background: var(--card);
    border-radius: var(--radius-card);
    padding: 48px 56px;
    box-shadow: var(--shadow);
    border: 1px solid #F0F2F5;
    margin-bottom: 32px;
    position: relative;
    overflow: hidden;
}
.article-header::before {
    content: '';
    position: absolute; top: -60px; right: -60px;
    width: 220px; height: 220px;
    background: radial-gradient(circle, rgba(249,115,22,0.12) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}
.article-header h1 {
    font-size: 34px; line-height: 1.35; font-weight: 800;
    color: var(--text);
    max-width: 90%;
    position: relative; z-index: 1;
}
.article-meta {
    display: flex; flex-wrap: wrap; align-items: center;
    gap: 20px; margin-top: 22px;
    font-size: 14px; color: var(--text-muted);
    position: relative; z-index: 1;
}
.meta-item { display: flex; align-items: center; gap: 8px; }
.meta-item i { color: var(--primary); font-size: 14px; }
.badge {
    display: inline-flex; align-items: center;
    padding: 4px 14px;
    background: rgba(124,58,237,0.1);
    color: var(--secondary);
    border-radius: var(--radius-badge);
    font-size: 12px; font-weight: 600;
}

/* 正文 */
.cms-article-body {
    max-width: 720px;
    margin: 0 auto;
    background: var(--card);
    border-radius: var(--radius-card);
    padding: 48px 56px;
    box-shadow: var(--shadow);
    border: 1px solid #F0F2F5;
}
.cms-article-body p { font-size: 16px; line-height: 1.8; color: var(--text-body); margin-bottom: 24px; }
.cms-article-body h2 { font-size: 26px; font-weight: 700; color: var(--text); margin: 40px 0 16px; line-height: 1.4; }
.cms-article-body h3 { font-size: 20px; font-weight: 700; color: var(--text); margin: 32px 0 12px; line-height: 1.4; }
.cms-article-body img { border-radius: 12px; margin: 24px 0; }
.cms-article-body ul, .cms-article-body ol { margin: 0 0 24px; padding-left: 24px; color: var(--text-body); line-height: 1.8; }
.cms-article-body li { margin-bottom: 8px; }
.cms-article-body blockquote {
    border-left: 3px solid var(--primary);
    background: rgba(249,115,22,0.05);
    padding: 16px 24px;
    border-radius: 0 12px 12px 0;
    margin: 24px 0;
    color: var(--text-body);
    font-style: italic;
}
.cms-article-body a { color: var(--primary); font-weight: 500; border-bottom: 1px solid rgba(249,115,22,0.3); transition: border-color 0.2s; }
.cms-article-body a:hover { border-bottom-color: var(--primary); }
.cms-article-body table { width: 100%; border-collapse: collapse; margin: 24px 0; }
.cms-article-body table th, .cms-article-body table td { border: 1px solid var(--border); padding: 12px 16px; text-align: left; }

/* 相关推荐 */
.related-section { max-width: 720px; margin: 48px auto 0; }
.related-section h2 {
    font-size: 22px; font-weight: 700; color: var(--text);
    margin-bottom: 24px;
    display: flex; align-items: center; gap: 12px;
}
.related-section h2::after { content: ''; flex: 1; height: 1px; background: var(--border); }
.related-card {
    display: flex; align-items: center; gap: 20px;
    background: var(--card);
    border-radius: 16px;
    padding: 20px;
    border: 1px solid #F0F2F5;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    height: 100%;
}
.related-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-3px); }
.related-thumb { width: 120px; height: 84px; border-radius: 12px; overflow: hidden; flex-shrink: 0; background: var(--bg); }
.related-thumb img { width: 100%; height: 100%; object-fit: cover; }
.related-info { flex: 1; }
.related-info h3 { font-size: 16px; font-weight: 700; color: var(--text); margin-bottom: 4px; }
.related-info p { font-size: 14px; color: var(--text-muted); line-height: 1.5; margin-bottom: 8px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.related-link { font-size: 13px; font-weight: 600; color: var(--primary); display: inline-flex; align-items: center; gap: 6px; transition: gap 0.2s; }
.related-card:hover .related-link { gap: 10px; }

/* 返回入口 */
.article-back-links { max-width: 720px; margin: 32px auto 0; display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* 未找到 */
.not-found-card {
    background: var(--card);
    border-radius: var(--radius-card);
    border: 2px dashed var(--border);
    padding: 80px 40px;
    text-align: center;
    max-width: 720px;
    margin: 40px auto;
}
.not-found-card i { font-size: 52px; color: var(--text-muted); margin-bottom: 20px; }
.not-found-card h2 { font-size: 24px; font-weight: 700; margin-bottom: 12px; color: var(--text); }
.not-found-card p { color: var(--text-muted); margin-bottom: 28px; }

/* 页脚 */
.site-footer { background: var(--dark); color: #fff; padding: 64px 0 0; margin-top: auto; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 48px; padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,0.1); }
.footer-logo { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.footer-logo .logo-mark { background: var(--primary); }
.footer-desc { font-size: 14px; color: rgba(255,255,255,0.6); line-height: 1.7; max-width: 320px; }
.footer-col h4 { font-size: 16px; font-weight: 600; margin-bottom: 20px; }
.footer-links { display: flex; flex-direction: column; gap: 12px; }
.footer-links a { font-size: 14px; color: rgba(255,255,255,0.6); transition: color 0.2s; }
.footer-links a:hover { color: var(--primary); }
.footer-bottom { padding: 24px 0; display: flex; justify-content: space-between; align-items: center; font-size: 13px; color: rgba(255,255,255,0.4); flex-wrap: wrap; gap: 8px; }
.footer-icp { display: flex; align-items: center; gap: 6px; }

/* 焦点可见性 */
.btn:focus-visible,
.nav-item:focus-visible,
.related-card:focus-visible,
.mobile-hamburger:focus-visible,
.drawer-close:focus-visible,
.drawer-nav-item:focus-visible,
.breadcrumb a:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* 响应式 */
@media (max-width: 1023px) and (min-width: 768px) {
    .app-sidebar { width: 88px; padding: 24px 12px; }
    .sidebar-logo { justify-content: center; padding: 0; }
    .logo-text { display: none; }
    .nav-item { justify-content: center; padding: 14px; }
    .nav-item span { display: none; }
    .nav-item i { font-size: 18px; }
    .nav-item.active::before { left: -12px; }
    .sidebar-bottom { text-align: center; font-size: 12px; justify-content: center; }
    .sidebar-bottom span:last-child { display: none; }
    .main-wrapper { margin-left: 88px; }
}

@media (max-width: 767px) {
    .app-sidebar { display: none; }
    .mobile-header { display: flex; }
    .drawer-overlay { display: block; }
    .mobile-drawer { display: flex; }
    .main-wrapper { margin-left: 0; padding-top: 64px; }
    .article-page { padding: 24px 0 48px; }
    .article-page .container { padding: 0 16px; }
    .article-header { padding: 32px 24px; }
    .article-header h1 { font-size: 24px; }
    .article-meta { gap: 12px; font-size: 13px; }
    .cms-article-body { padding: 28px 20px; }
    .related-card { flex-direction: column; align-items: flex-start; gap: 12px; }
    .related-thumb { width: 100%; height: 140px; }
    .article-back-links { flex-direction: column; align-items: stretch; }
    .article-back-links .btn { width: 100%; }
    .footer-grid { grid-template-columns: 1fr; gap: 32px; }
    .footer-bottom { flex-direction: column; text-align: center; }
    .not-found-card { padding: 48px 24px; }
}

@media (max-width: 520px) {
    .article-header { padding: 24px 20px; }
    .article-meta { flex-direction: column; align-items: flex-start; gap: 8px; }
    .breadcrumb { font-size: 13px; flex-wrap: wrap; }
    .cms-article-body h2 { font-size: 22px; }
}

/* roulang page: category1 */
:root {
      --primary: #F97316;
      --primary-dark: #EA580C;
      --secondary: #7C3AED;
      --bg: #F6F7FB;
      --card-bg: #FFFFFF;
      --dark: #14161C;
      --text: #1A1D23;
      --text-body: #555B66;
      --text-weak: #8B929E;
      --border: #E9ECF0;
      --success: #10B981;
      --radius-lg: 20px;
      --radius-md: 16px;
      --radius-sm: 10px;
      --shadow-sm: 0 2px 8px rgba(20, 22, 28, 0.06);
      --shadow-lg: 0 12px 28px rgba(20, 22, 28, 0.12);
      --font-main: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
      --font-num: "Inter", "Roboto", var(--font-main);
      --sidebar-w: 240px;
      --sidebar-w-sm: 88px;
      --topbar-h: 64px;
      --section-pad: 96px;
    }

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

    html {
      scroll-behavior: smooth;
    }

    body {
      font-family: var(--font-main);
      background: var(--bg);
      color: var(--text);
      line-height: 1.7;
      font-size: 16px;
      -webkit-font-smoothing: antialiased;
    }

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

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

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

    a:focus-visible,
    button:focus-visible,
    .accordion-title:focus-visible {
      outline: 2px solid var(--primary);
      outline-offset: 2px;
    }

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

    .container {
      max-width: 1200px;
      margin: 0 auto;
      padding: 0 24px;
      width: 100%;
    }

    /* ===== 移动端顶部栏 ===== */
    .mobile-topbar {
      position: fixed;
      top: 0;
      left: 0;
      right: 0;
      height: var(--topbar-h);
      background: #fff;
      border-bottom: 1px solid var(--border);
      display: none;
      align-items: center;
      justify-content: space-between;
      padding: 0 20px;
      z-index: 200;
    }

    .mobile-logo {
      display: flex;
      align-items: center;
      gap: 10px;
    }

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

    .mobile-hamburger {
      width: 44px;
      height: 44px;
      border-radius: var(--radius-sm);
      background: var(--bg);
      color: var(--text);
      font-size: 20px;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: background 0.2s ease;
    }

    .mobile-hamburger:hover {
      background: #edf0f5;
    }

    /* ===== Logo 标记 ===== */
    .logo-mark {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 36px;
      height: 36px;
      border-radius: 10px;
      background: var(--primary);
      color: #fff;
      font-family: var(--font-num);
      font-weight: 800;
      font-size: 14px;
      letter-spacing: -0.5px;
      flex-shrink: 0;
    }

    /* ===== 左侧导航 ===== */
    .sidebar {
      position: fixed;
      top: 0;
      left: 0;
      bottom: 0;
      width: var(--sidebar-w);
      background: #fff;
      border-right: 1px solid var(--border);
      padding: 28px 16px;
      display: flex;
      flex-direction: column;
      z-index: 150;
      transition: width 0.3s ease;
    }

    .sidebar-logo {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 0 10px 28px;
      border-bottom: 1px solid var(--border);
      margin-bottom: 24px;
    }

    .sidebar-logo .logo-text {
      font-size: 18px;
      font-weight: 800;
      color: var(--text);
      white-space: nowrap;
    }

    .sidebar-nav {
      display: flex;
      flex-direction: column;
      gap: 4px;
      flex: 1;
    }

    .sidebar-nav .nav-item {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 13px 14px;
      border-radius: 10px;
      color: var(--text-body);
      font-size: 15px;
      font-weight: 500;
      transition: background 0.2s ease, color 0.2s ease;
      position: relative;
      min-height: 44px;
    }

    .sidebar-nav .nav-item i {
      width: 20px;
      text-align: center;
      font-size: 16px;
      color: var(--text-weak);
      transition: color 0.2s ease;
    }

    .sidebar-nav .nav-item:hover {
      background: #f5f6fa;
      color: var(--text);
    }

    .sidebar-nav .nav-item:hover i {
      color: var(--primary);
    }

    .sidebar-nav .nav-item.active {
      background: rgba(249, 115, 22, 0.08);
      color: var(--primary);
      font-weight: 700;
    }

    .sidebar-nav .nav-item.active::before {
      content: '';
      position: absolute;
      left: 0;
      top: 50%;
      transform: translateY(-50%);
      width: 3px;
      height: 22px;
      background: var(--primary);
      border-radius: 0 3px 3px 0;
    }

    .sidebar-nav .nav-item.active i {
      color: var(--primary);
    }

    .sidebar-bottom {
      padding: 16px 14px 0;
      border-top: 1px solid var(--border);
      display: flex;
      align-items: center;
      gap: 8px;
    }

    .sidebar-version {
      font-family: var(--font-num);
      font-size: 13px;
      color: var(--text-weak);
      background: var(--bg);
      padding: 4px 10px;
      border-radius: 999px;
      font-weight: 600;
    }

    /* ===== 移动端抽屉 ===== */
    .drawer-overlay {
      position: fixed;
      inset: 0;
      background: rgba(20, 22, 28, 0.5);
      z-index: 300;
      opacity: 0;
      visibility: hidden;
      transition: opacity 0.3s ease, visibility 0.3s ease;
    }

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

    .mobile-drawer {
      position: fixed;
      top: 0;
      left: 0;
      bottom: 0;
      width: 280px;
      background: #fff;
      z-index: 320;
      transform: translateX(-100%);
      transition: transform 0.35s ease;
      display: flex;
      flex-direction: column;
      padding: 24px 20px;
      box-shadow: 4px 0 30px rgba(20, 22, 28, 0.2);
    }

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

    .drawer-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding-bottom: 20px;
      border-bottom: 1px solid var(--border);
      margin-bottom: 20px;
    }

    .drawer-logo {
      display: flex;
      align-items: center;
      gap: 10px;
    }

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

    .drawer-close {
      width: 40px;
      height: 40px;
      border-radius: 10px;
      background: var(--bg);
      color: var(--text);
      font-size: 18px;
      display: flex;
      align-items: center;
      justify-content: center;
    }

    .drawer-close:hover {
      background: #edf0f5;
    }

    .drawer-nav {
      display: flex;
      flex-direction: column;
      gap: 8px;
    }

    .drawer-nav .nav-item {
      display: flex;
      align-items: center;
      gap: 14px;
      padding: 14px 16px;
      border-radius: 12px;
      color: var(--text-body);
      font-size: 16px;
      font-weight: 500;
      min-height: 48px;
      transition: background 0.2s ease, color 0.2s ease;
    }

    .drawer-nav .nav-item i {
      width: 22px;
      text-align: center;
      font-size: 17px;
      color: var(--text-weak);
    }

    .drawer-nav .nav-item.active {
      background: rgba(249, 115, 22, 0.08);
      color: var(--primary);
      font-weight: 700;
    }

    .drawer-nav .nav-item.active i {
      color: var(--primary);
    }

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

    /* ===== 按钮 ===== */
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 14px 28px;
      border-radius: 10px;
      font-size: 15px;
      font-weight: 600;
      line-height: 1;
      min-height: 48px;
      transition: all 0.25s ease;
      border: 2px solid transparent;
    }

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

    .btn-primary:hover {
      background: var(--primary-dark);
      color: #fff;
      transform: translateY(-2px);
      box-shadow: 0 8px 20px rgba(249, 115, 22, 0.3);
    }

    .btn-outline {
      background: transparent;
      color: #fff;
      border-color: rgba(255, 255, 255, 0.6);
    }

    .btn-outline:hover {
      border-color: #fff;
      color: #fff;
      background: rgba(255, 255, 255, 0.1);
      transform: translateY(-2px);
    }

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

    .btn-dark:hover {
      background: #2a2e38;
      color: #fff;
      transform: translateY(-2px);
    }

    /* ===== 面包屑 ===== */
    .breadcrumb {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 14px;
      color: rgba(255, 255, 255, 0.6);
      margin-bottom: 20px;
    }

    .breadcrumb a {
      color: rgba(255, 255, 255, 0.75);
    }

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

    .breadcrumb span {
      display: inline-flex;
    }

    /* ===== Page Hero ===== */
    .page-hero {
      position: relative;
      background: var(--dark);
      padding: 90px 0 84px;
      overflow: hidden;
    }

    .page-hero .hero-bg {
      position: absolute;
      inset: 0;
      background-size: cover;
      background-position: center;
      opacity: 0.35;
    }

    .page-hero .hero-overlay {
      position: absolute;
      inset: 0;
      background: radial-gradient(circle at 82% 20%, rgba(249, 115, 22, 0.25), transparent 55%),
                  linear-gradient(90deg, rgba(20, 22, 28, 0.92) 0%, rgba(20, 22, 28, 0.6) 100%);
    }

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

    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: var(--primary);
      color: #fff;
      font-size: 12px;
      font-weight: 600;
      padding: 6px 14px;
      border-radius: 999px;
      margin-bottom: 18px;
      letter-spacing: 0.5px;
    }

    .page-hero h1 {
      font-size: 48px;
      line-height: 1.25;
      font-weight: 800;
      color: #fff;
      margin-bottom: 16px;
      letter-spacing: -1px;
    }

    .hero-subtitle {
      font-size: 17px;
      color: rgba(255, 255, 255, 0.7);
      max-width: 640px;
      line-height: 1.75;
      margin-bottom: 32px;
    }

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

    /* ===== Section 通用 ===== */
    .section {
      padding: var(--section-pad) 0;
    }

    .section-header {
      text-align: center;
      max-width: 660px;
      margin: 0 auto 56px;
    }

    .section-tag {
      display: inline-block;
      font-family: var(--font-num);
      font-size: 12px;
      font-weight: 700;
      letter-spacing: 2px;
      text-transform: uppercase;
      color: var(--primary);
      background: rgba(249, 115, 22, 0.08);
      padding: 5px 14px;
      border-radius: 999px;
      margin-bottom: 12px;
    }

    .section-header h2 {
      font-size: 34px;
      line-height: 1.3;
      font-weight: 800;
      color: var(--text);
      margin-bottom: 14px;
    }

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

    /* ===== 入口卡片区 ===== */
    .entry-section {
      background: var(--bg);
    }

    .entry-card {
      background: var(--card-bg);
      border-radius: var(--radius-md);
      border: 1px solid #F0F2F5;
      overflow: hidden;
      height: 100%;
      display: flex;
      flex-direction: column;
      transition: box-shadow 0.3s ease, transform 0.3s ease, border-color 0.3s ease;
    }

    .entry-card:hover {
      box-shadow: var(--shadow-lg);
      transform: translateY(-4px);
      border-color: transparent;
    }

    .entry-card .card-img {
      position: relative;
      aspect-ratio: 16 / 9;
      overflow: hidden;
      background: #eceef1;
    }

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

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

    .entry-card .card-img::after {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(180deg, transparent 50%, rgba(20, 22, 28, 0.15));
    }

    .entry-card .card-content {
      padding: 22px 24px 26px;
      display: flex;
      flex-direction: column;
      flex: 1;
    }

    .card-meta {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-bottom: 12px;
    }

    .card-badge {
      display: inline-flex;
      align-items: center;
      gap: 4px;
      background: rgba(249, 115, 22, 0.1);
      color: var(--primary);
      font-size: 12px;
      font-weight: 600;
      padding: 4px 10px;
      border-radius: 999px;
    }

    .card-badge.purple {
      background: rgba(124, 58, 237, 0.1);
      color: var(--secondary);
    }

    .entry-card h3 {
      font-size: 19px;
      font-weight: 700;
      color: var(--text);
      margin-bottom: 10px;
      line-height: 1.4;
    }

    .entry-card p {
      font-size: 14px;
      color: var(--text-body);
      line-height: 1.7;
      flex: 1;
      margin-bottom: 16px;
    }

    .card-link {
      display: inline-block;
      font-size: 14px;
      font-weight: 600;
      color: var(--primary);
      transition: gap 0.2s ease, color 0.2s ease;
    }

    .card-link i {
      margin-left: 4px;
      transition: transform 0.2s ease;
    }

    .card-link:hover i {
      transform: translateX(4px);
    }

    /* ===== 步骤区 ===== */
    .steps-section {
      background: #fff;
    }

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

    .steps-row::before {
      content: '';
      position: absolute;
      top: 32px;
      left: 12%;
      right: 12%;
      height: 2px;
      background: linear-gradient(90deg, var(--primary), rgba(249, 115, 22, 0.15));
      border-radius: 2px;
    }

    .step-item {
      text-align: center;
      padding: 0 12px;
      position: relative;
    }

    .step-number {
      width: 64px;
      height: 64px;
      border-radius: 50%;
      background: var(--dark);
      color: #fff;
      font-family: var(--font-num);
      font-size: 20px;
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 20px;
      position: relative;
      z-index: 1;
      box-shadow: 0 0 0 6px #fff, 0 4px 14px rgba(20, 22, 28, 0.2);
    }

    .step-item:nth-child(1) .step-number {
      background: var(--primary);
    }

    .step-item:nth-child(2) .step-number {
      background: var(--secondary);
    }

    .step-item h3 {
      font-size: 18px;
      font-weight: 700;
      color: var(--text);
      margin-bottom: 8px;
    }

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

    /* ===== 安全提示区 ===== */
    .safety-section {
      background: var(--dark);
      position: relative;
      overflow: hidden;
    }

    .safety-section::before {
      content: '';
      position: absolute;
      top: -80px;
      right: -80px;
      width: 260px;
      height: 260px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(124, 58, 237, 0.25), transparent 70%);
    }

    .safety-section .section-header h2 {
      color: #fff;
    }

    .safety-section .section-header p {
      color: rgba(255, 255, 255, 0.65);
    }

    .safety-item {
      text-align: center;
      background: rgba(255, 255, 255, 0.05);
      border: 1px solid rgba(255, 255, 255, 0.08);
      border-radius: var(--radius-md);
      padding: 36px 28px;
      height: 100%;
      transition: background 0.3s ease, transform 0.3s ease;
    }

    .safety-item:hover {
      background: rgba(255, 255, 255, 0.09);
      transform: translateY(-4px);
    }

    .safety-item .safety-icon {
      width: 56px;
      height: 56px;
      border-radius: 14px;
      background: rgba(249, 115, 22, 0.15);
      color: var(--primary);
      font-size: 24px;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 18px;
    }

    .safety-item:nth-child(2) .safety-icon {
      background: rgba(124, 58, 237, 0.18);
      color: #a78bfa;
    }

    .safety-item:nth-child(3) .safety-icon {
      background: rgba(16, 185, 129, 0.15);
      color: var(--success);
    }

    .safety-item h3 {
      font-size: 17px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 10px;
    }

    .safety-item p {
      font-size: 14px;
      color: rgba(255, 255, 255, 0.6);
      line-height: 1.7;
    }

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

    .faq-accordion {
      max-width: 820px;
      margin: 0 auto;
      background: transparent;
      border: none;
    }

    .faq-accordion .accordion-item {
      background: #fff;
      border-radius: 14px;
      border: 1px solid #F0F2F5;
      margin-bottom: 14px;
      overflow: hidden;
      transition: box-shadow 0.3s ease;
    }

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

    .faq-accordion .accordion-item.is-active {
      box-shadow: var(--shadow-sm);
      border-color: rgba(249, 115, 22, 0.3);
    }

    .faq-accordion .accordion-title {
      display: flex;
      align-items: center;
      gap: 14px;
      padding: 20px 24px;
      font-size: 16px;
      font-weight: 600;
      color: var(--text);
      line-height: 1.5;
      background: transparent;
      border-bottom: 1px solid var(--border);
    }

    .faq-accordion .accordion-title::before {
      content: '问';
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 28px;
      height: 28px;
      border-radius: 8px;
      background: rgba(249, 115, 22, 0.1);
      color: var(--primary);
      font-size: 13px;
      font-weight: 700;
      flex-shrink: 0;
    }

    .faq-accordion .accordion-title::after {
      content: '\f078';
      font-family: 'Font Awesome 6 Free';
      font-weight: 900;
      font-size: 13px;
      color: var(--text-weak);
      margin-left: auto;
      transition: transform 0.25s ease;
      border: none;
      background: transparent;
      position: static;
    }

    .faq-accordion .accordion-item.is-active .accordion-title::after {
      transform: rotate(180deg);
    }

    .faq-accordion .accordion-title:hover,
    .faq-accordion .accordion-title:focus {
      background: rgba(249, 115, 22, 0.03);
    }

    .faq-accordion .accordion-content {
      padding: 18px 24px 22px 66px;
      background: #fff;
      color: var(--text-body);
      font-size: 15px;
      line-height: 1.75;
      border-bottom: none;
    }

    .faq-accordion .accordion-content p {
      color: var(--text-body);
    }

    /* ===== CTA ===== */
    .cta-section {
      background: #fff;
      padding-bottom: var(--section-pad);
    }

    .cta-box {
      background: var(--dark);
      border-radius: 24px;
      padding: 64px 48px;
      text-align: center;
      position: relative;
      overflow: hidden;
    }

    .cta-box::before {
      content: '';
      position: absolute;
      top: -60px;
      left: -40px;
      width: 200px;
      height: 200px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(249, 115, 22, 0.3), transparent 70%);
    }

    .cta-box::after {
      content: '';
      position: absolute;
      bottom: -80px;
      right: -30px;
      width: 240px;
      height: 240px;
      border-radius: 50%;
      border: 2px dashed rgba(255, 255, 255, 0.12);
    }

    .cta-box h2 {
      font-size: 32px;
      font-weight: 800;
      color: #fff;
      margin-bottom: 14px;
      position: relative;
      z-index: 1;
    }

    .cta-box p {
      font-size: 15px;
      color: rgba(255, 255, 255, 0.65);
      margin-bottom: 32px;
      position: relative;
      z-index: 1;
    }

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

    /* ===== 页脚 ===== */
    .site-footer {
      background: var(--dark);
      color: rgba(255, 255, 255, 0.6);
      padding: 60px 0 0;
      margin-top: auto;
    }

    .footer-grid {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr;
      gap: 48px;
      padding-bottom: 40px;
    }

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

    .footer-logo .logo-text {
      font-size: 19px;
      font-weight: 800;
      color: #fff;
    }

    .footer-desc {
      font-size: 14px;
      line-height: 1.75;
      color: rgba(255, 255, 255, 0.5);
      max-width: 320px;
    }

    .footer-col h4 {
      font-size: 15px;
      font-weight: 700;
      color: #fff;
      margin-bottom: 18px;
    }

    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }

    .footer-links a {
      font-size: 14px;
      color: rgba(255, 255, 255, 0.55);
      transition: color 0.2s ease;
    }

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

    .footer-bottom {
      border-top: 1px solid rgba(255, 255, 255, 0.08);
      padding: 22px 0 28px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      flex-wrap: wrap;
      font-size: 13px;
      color: rgba(255, 255, 255, 0.35);
    }

    .footer-icp {
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }

    .footer-icp i {
      color: rgba(255, 255, 255, 0.3);
    }

    /* ===== 响应式 ===== */
    @media (max-width: 1199px) {
      :root {
        --section-pad: 80px;
      }

      .page-hero h1 {
        font-size: 42px;
      }
    }

    @media (min-width: 768px) and (max-width: 1023px) {
      :root {
        --sidebar-w: var(--sidebar-w-sm);
        --section-pad: 72px;
      }

      .sidebar {
        padding: 24px 12px;
      }

      .sidebar-logo {
        padding: 0 6px 24px;
        justify-content: center;
      }

      .sidebar-logo .logo-text {
        display: none;
      }

      .sidebar-nav .nav-item {
        justify-content: center;
        padding: 14px 0;
      }

      .sidebar-nav .nav-item span {
        display: none;
      }

      .sidebar-nav .nav-item i {
        font-size: 18px;
      }

      .sidebar-bottom {
        justify-content: center;
        padding: 14px 0 0;
      }

      .steps-row {
        grid-template-columns: repeat(2, 1fr);
        gap: 40px 20px;
      }

      .steps-row::before {
        display: none;
      }

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

      .page-hero h1 {
        font-size: 38px;
      }
    }

    @media (max-width: 767px) {
      :root {
        --section-pad: 56px;
      }

      .sidebar {
        display: none;
      }

      .mobile-topbar {
        display: flex;
      }

      .main-content {
        margin-left: 0;
        padding-top: var(--topbar-h);
      }

      .page-hero {
        padding: 56px 0 60px;
      }

      .page-hero h1 {
        font-size: 34px;
      }

      .hero-subtitle {
        font-size: 15px;
      }

      .hero-actions {
        flex-direction: column;
        width: 100%;
      }

      .hero-actions .btn {
        width: 100%;
      }

      .section-header {
        margin-bottom: 40px;
      }

      .section-header h2 {
        font-size: 26px;
      }

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

      .steps-row::before {
        display: none;
      }

      .step-item {
        display: flex;
        align-items: flex-start;
        text-align: left;
        gap: 16px;
        padding: 0;
      }

      .step-number {
        margin: 0;
        flex-shrink: 0;
        width: 52px;
        height: 52px;
        font-size: 17px;
      }

      .step-item h3 {
        margin-bottom: 4px;
      }

      .cta-box {
        padding: 44px 28px;
        border-radius: 18px;
      }

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

      .cta-box .btn {
        width: 100%;
      }

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

      .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
        text-align: center;
        justify-content: center;
      }

      .footer-bottom span {
        width: 100%;
        text-align: center;
      }

      .entry-card .card-content {
        padding: 18px 2px 22px;
      }

      .faq-accordion .accordion-title {
        padding: 16px 16px;
        font-size: 15px;
        gap: 10px;
      }

      .faq-accordion .accordion-content {
        padding: 14px 16px 18px 52px;
        font-size: 14px;
      }
    }

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

      .btn {
        padding: 13px 20px;
        font-size: 14px;
      }

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

      .hero-subtitle {
        font-size: 14px;
      }
    }

/* roulang page: category2 */
:root {
  --primary: #F97316;
  --primary-dark: #EA580C;
  --secondary: #7C3AED;
  --bg: #F6F7FB;
  --card-bg: #FFFFFF;
  --dark: #14161C;
  --text-main: #1A1D23;
  --text-body: #555B66;
  --text-weak: #8B929E;
  --border: #E9ECF0;
  --card-border: #F0F2F5;
  --success: #10B981;
  --radius-card: 16px;
  --radius-btn: 10px;
  --radius-tag: 999px;
  --shadow-sm: 0 2px 8px rgba(20,22,28,0.06);
  --shadow-hover: 0 12px 28px rgba(20,22,28,0.12);
  --font-family: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-en: "Inter", "Roboto", sans-serif;
  --transition: all 0.25s ease;
}
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; scroll-behavior: smooth; }
body { font-family: var(--font-family); background: var(--bg); color: var(--text-main); line-height: 1.75; -webkit-font-smoothing: antialiased; }
img { max-width: 100%; display: block; }
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-dark); }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

/* App Shell Layout */
.app-shell { display: flex; min-height: 100vh; }
.sidebar { width: 240px; background: #FFFFFF; border-right: 1px solid var(--border); position: fixed; top: 0; left: 0; bottom: 0; z-index: 100; display: flex; flex-direction: column; justify-content: space-between; padding: 24px 0; transition: var(--transition); }
.main-content { flex: 1; margin-left: 240px; min-width: 0; }
.sidebar-logo { display: flex; align-items: center; gap: 12px; padding: 0 24px 28px; }
.logo-mark { width: 42px; height: 42px; background: var(--primary); color: #fff; border-radius: 12px; display: flex; align-items: center; justify-content: center; font-family: var(--font-en); font-weight: 800; font-size: 16px; box-shadow: 0 4px 12px rgba(249,115,22,0.35); }
.logo-text { font-size: 18px; font-weight: 800; color: var(--text-main); white-space: nowrap; }
.sidebar-nav { display: flex; flex-direction: column; gap: 4px; padding: 0 14px; flex-grow: 1; }
.nav-item { display: flex; align-items: center; gap: 14px; padding: 12px 16px; border-radius: 12px; color: var(--text-body); font-size: 15px; font-weight: 500; transition: var(--transition); position: relative; min-height: 44px; }
.nav-item i { width: 20px; text-align: center; font-size: 16px; }
.nav-item:hover { background: rgba(249,115,22,0.08); color: var(--primary); }
.nav-item.active { background: rgba(249,115,22,0.1); color: var(--primary); font-weight: 700; }
.nav-item.active::before { content: ''; position: absolute; left: 0; top: 50%; transform: translateY(-50%); width: 3px; height: 22px; background: var(--primary); border-radius: 0 3px 3px 0; }
.sidebar-bottom { padding: 20px 24px 8px; border-top: 1px solid var(--border); }
.sidebar-bottom span { font-size: 13px; color: var(--text-weak); display: block; line-height: 1.5; }

/* Mobile Topbar */
.mobile-topbar { display: none; position: fixed; top: 0; left: 0; right: 0; height: 64px; background: #fff; border-bottom: 1px solid var(--border); z-index: 200; align-items: center; justify-content: space-between; padding: 0 24px; }
.mobile-topbar .logo-text { font-size: 16px; }
.hamburger-btn { width: 44px; height: 44px; background: transparent; border: none; border-radius: 10px; font-size: 20px; color: var(--text-main); cursor: pointer; display: flex; align-items: center; justify-content: center; }
.hamburger-btn:hover { background: rgba(249,115,22,0.08); }

/* Mobile Drawer */
.mobile-drawer-overlay { display: none; position: fixed; top: 0; left: 0; right: 0; bottom: 0; background: rgba(20,22,28,0.5); z-index: 300; opacity: 0; transition: opacity 0.3s ease; }
.mobile-drawer-overlay.active { opacity: 1; }
.mobile-drawer { display: none; position: fixed; top: 0; left: 0; bottom: 0; width: 280px; background: #fff; z-index: 301; transform: translateX(-100%); transition: transform 0.3s ease; padding: 20px 0; flex-direction: column; }
.mobile-drawer.active { transform: translateX(0); }
.drawer-header { display: flex; align-items: center; justify-content: space-between; padding: 0 20px 20px; border-bottom: 1px solid var(--border); }
.drawer-close { width: 44px; height: 44px; background: transparent; border: none; font-size: 20px; color: var(--text-body); cursor: pointer; border-radius: 10px; }
.drawer-close:hover { background: rgba(249,115,22,0.08); color: var(--primary); }
.drawer-nav { padding: 16px 14px; display: flex; flex-direction: column; gap: 4px; }
.drawer-nav .nav-item { min-height: 48px; font-size: 16px; }
.mobile-drawer .sidebar-bottom { margin-top: auto; }

/* Category Hero */
.category-hero { background: var(--dark); padding: 80px 0 72px; position: relative; overflow: hidden; }
.category-hero::before { content: ''; position: absolute; top: -120px; right: -80px; width: 300px; height: 300px; background: radial-gradient(circle, rgba(249,115,22,0.3) 0%, transparent 70%); pointer-events: none; }
.category-hero::after { content: ''; position: absolute; bottom: -100px; left: -60px; width: 260px; height: 260px; background: radial-gradient(circle, rgba(124,58,237,0.2) 0%, transparent 70%); pointer-events: none; }
.category-hero .container { position: relative; z-index: 2; }
.category-hero .row { align-items: center; }
.category-hero h1 { font-size: 48px; line-height: 1.25; font-weight: 800; color: #fff; margin: 0 0 6px; }
.hero-badge { display: inline-flex; align-items: center; gap: 6px; background: rgba(249,115,22,0.2); border: 1px solid rgba(249,115,22,0.4); color: #F97316; font-size: 13px; font-weight: 600; padding: 4px 14px; border-radius: 999px; letter-spacing: 0.5px; }
.hero-badge i { font-size: 12px; }
.category-hero .lead { font-size: 17px; color: rgba(255,255,255,0.7); max-width: 520px; margin: 16px 0 0; line-height: 1.8; }
.hero-stats { display: flex; gap: 32px; margin-top: 32px; flex-wrap: wrap; }
.hero-stat-item { display: flex; flex-direction: column; }
.hero-stat-num { font-family: var(--font-en); font-size: 28px; font-weight: 800; color: #fff; line-height: 1.2; }
.hero-stat-label { font-size: 13px; color: rgba(255,255,255,0.55); margin-top: 2px; }
.hero-visual { border-radius: 20px; overflow: hidden; box-shadow: 0 20px 50px rgba(0,0,0,0.35); position: relative; height: 100%; min-height: 260px; background: url('/assets/images/backpic/back-1.png') center/cover no-repeat; }
.hero-visual::after { content: ''; position: absolute; inset: 0; background: linear-gradient(180deg, rgba(20,22,28,0) 0%, rgba(20,22,28,0.3) 100%); }
.hero-visual .visual-tag { position: absolute; bottom: 20px; left: 20px; z-index: 2; background: rgba(20,22,28,0.7); backdrop-filter: blur(5px); color: #fff; padding: 6px 14px; border-radius: 999px; font-size: 13px; border: 1px solid rgba(255,255,255,0.15); }
.hero-visual .visual-tag i { color: var(--primary); margin-right: 6px; }

/* Section base */
.section { padding: 90px 0; }
.section-alt { background: #fff; }
.section-head { margin-bottom: 48px; }
.section-head .section-kicker { display: inline-flex; align-items: center; gap: 8px; color: var(--primary); font-size: 13px; font-weight: 700; letter-spacing: 0.08em; text-transform: uppercase; margin-bottom: 12px; }
.section-head .section-kicker::before { content: ''; width: 24px; height: 2px; background: var(--primary); border-radius: 2px; }
.section-head h2 { font-size: 34px; line-height: 1.3; font-weight: 800; color: var(--text-main); margin: 0 0 10px; }
.section-head p { font-size: 16px; color: var(--text-body); max-width: 640px; }

/* Alternating Feature Row */
.alternate-row { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; margin-bottom: 72px; }
.alternate-row:last-child { margin-bottom: 0; }
.alternate-row.reverse .alternate-visual { order: 2; }
.alternate-row.reverse .alternate-content { order: 1; }
.alternate-visual { position: relative; border-radius: 20px; overflow: hidden; box-shadow: var(--shadow-sm); }
.alternate-visual img { width: 100%; height: 300px; object-fit: cover; border-radius: 20px; transition: transform 0.4s ease; }
.alternate-visual:hover img { transform: scale(1.03); }
.alternate-visual .visual-arrow { position: absolute; right: 20px; bottom: 20px; width: 44px; height: 44px; background: var(--primary); border-radius: 50%; display: flex; align-items: center; justify-content: center; color: #fff; font-size: 16px; box-shadow: 0 6px 16px rgba(249,115,22,0.4); }
.alternate-content .step-tag { display: inline-flex; align-items: center; background: rgba(124,58,237,0.1); color: var(--secondary); padding: 4px 12px; border-radius: 999px; font-size: 13px; font-weight: 600; margin-bottom: 16px; }
.alternate-content .step-tag i { margin-right: 5px; font-size: 12px; }
.alternate-content h3 { font-size: 22px; line-height: 1.4; font-weight: 700; color: var(--text-main); margin: 0 0 14px; }
.alternate-content p { font-size: 15px; color: var(--text-body); line-height: 1.8; margin: 0 0 18px; }
.alternate-list { list-style: none; padding: 0; margin: 0 0 20px 0; }
.alternate-list li { position: relative; padding-left: 24px; font-size: 14.5px; color: var(--text-body); margin-bottom: 8px; line-height: 1.6; }
.alternate-list li::before { content: '\f00c'; font-family: 'Font Awesome 6 Free'; font-weight: 900; position: absolute; left: 0; top: 1px; font-size: 13px; color: var(--success); }

/* Update Timeline */
.timeline-section { background: var(--dark); padding: 90px 0; position: relative; overflow: hidden; }
.timeline-section::before { content: ''; position: absolute; top: -80px; left: 30%; width: 200px; height: 200px; background: radial-gradient(circle, rgba(249,115,22,0.15) 0%, transparent 70%); }
.timeline-section .section-head h2 { color: #fff; }
.timeline-section .section-head p { color: rgba(255,255,255,0.6); }
.timeline-wrap { position: relative; max-width: 720px; margin: 0 auto; }
.timeline-wrap::before { content: ''; position: absolute; left: 20px; top: 0; bottom: 0; width: 2px; background: rgba(255,255,255,0.15); }
.timeline-item { position: relative; padding-left: 60px; margin-bottom: 32px; }
.timeline-item:last-child { margin-bottom: 0; }
.timeline-dot { position: absolute; left: 15px; top: 6px; width: 12px; height: 12px; border-radius: 50%; background: var(--primary); transform: translateX(-50%); box-shadow: 0 0 0 4px rgba(249,115,22,0.2); }
.timeline-card { background: rgba(255,255,255,0.05); border: 1px solid rgba(255,255,255,0.1); border-radius: 16px; padding: 22px 26px; backdrop-filter: blur(4px); transition: var(--transition); }
.timeline-card:hover { background: rgba(255,255,255,0.08); border-color: rgba(249,115,22,0.3); transform: translateY(-2px); }
.timeline-version { display: inline-block; font-family: var(--font-en); font-size: 13px; font-weight: 700; color: var(--primary); background: rgba(249,115,22,0.2); padding: 3px 10px; border-radius: 6px; margin-bottom: 10px; }
.timeline-date { display: block; font-size: 13px; color: rgba(255,255,255,0.45); margin-bottom: 8px; }
.timeline-card h4 { font-size: 17px; color: #fff; font-weight: 700; margin: 0 0 8px; }
.timeline-card p { font-size: 14px; color: rgba(255,255,255,0.6); line-height: 1.7; margin: 0; }

/* Version Features grid */
.feature-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.feature-mini-card { background: var(--card-bg); border: 1px solid var(--card-border); border-radius: 16px; padding: 24px; display: flex; gap: 16px; transition: var(--transition); }
.feature-mini-card:hover { box-shadow: var(--shadow-hover); border-color: transparent; }
.feature-mini-icon { width: 44px; height: 44px; background: rgba(249,115,22,0.1); border-radius: 12px; display: flex; align-items: center; justify-content: center; color: var(--primary); font-size: 18px; flex-shrink: 0; }
.feature-mini-card:nth-child(even) .feature-mini-icon { background: rgba(124,58,237,0.1); color: var(--secondary); }
.feature-mini-card h4 { font-size: 16px; font-weight: 700; color: var(--text-main); margin: 0 0 4px; }
.feature-mini-card p { font-size: 14px; color: var(--text-body); margin: 0; line-height: 1.6; }

/* FAQ Accordion custom */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item { background: #fff; border: 1px solid var(--card-border); border-radius: 12px; padding: 22px 26px; margin-bottom: 12px; transition: var(--transition); }
.faq-item[aria-expanded="true"], .faq-item.is-open { border-color: rgba(249,115,22,0.3); box-shadow: var(--shadow-sm); }
.faq-question { display: flex; align-items: center; gap: 14px; cursor: pointer; user-select: none; }
.faq-q-mark { background: rgba(249,115,22,0.1); color: var(--primary); width: 28px; height: 28px; border-radius: 8px; display: flex; align-items: center; justify-content: center; font-size: 14px; font-weight: 800; flex-shrink: 0; }
.faq-question h4 { font-size: 16px; font-weight: 700; color: var(--text-main); margin: 0; flex: 1; }
.faq-toggle { width: 28px; height: 28px; border: none; background: transparent; color: var(--text-weak); font-size: 14px; cursor: pointer; transition: transform 0.25s ease; border-radius: 50%; display: flex; align-items: center; justify-content: center; }
.faq-item.is-open .faq-toggle { transform: rotate(45deg); color: var(--primary); }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.35s ease, padding 0.3s ease, opacity 0.3s ease; padding-left: 42px; opacity: 0; }
.faq-answer-inner { padding: 14px 0 2px; font-size: 15px; color: var(--text-body); line-height: 1.8; }
.faq-item.is-open .faq-answer { max-height: 500px; opacity: 1; padding-top: 4px; }

/* CTA band */
.cta-band { padding: 70px 0 90px; }
.cta-inner { background: var(--dark); border-radius: 24px; text-align: center; padding: 64px 40px; position: relative; overflow: hidden; }
.cta-inner::before { content: ''; position: absolute; top: -100px; right: -60px; width: 240px; height: 240px; background: radial-gradient(circle, rgba(249,115,22,0.25) 0%, transparent 70%); }
.cta-inner::after { content: ''; position: absolute; bottom: -80px; left: -40px; width: 180px; height: 180px; background: radial-gradient(circle, rgba(124,58,237,0.18) 0%, transparent 70%); }
.cta-inner h2 { font-size: 28px; font-weight: 800; color: #fff; margin: 0 0 10px; position: relative; z-index: 2; }
.cta-inner p { font-size: 14px; color: rgba(255,255,255,0.6); margin: 0 0 28px; position: relative; z-index: 2; }
.cta-btn { display: inline-flex; align-items: center; gap: 9px; background: var(--primary); color: #fff; font-size: 15px; font-weight: 700; padding: 13px 32px; border-radius: 10px; border: none; cursor: pointer; transition: var(--transition); position: relative; z-index: 2; min-height: 48px; }
.cta-btn:hover { background: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 10px 24px rgba(249,115,22,0.35); color: #fff; }
.cta-btn:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }

/* Footer */
.site-footer { background: var(--dark); padding: 60px 0 0; color: #fff; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 40px; padding-bottom: 40px; border-bottom: 1px solid rgba(255,255,255,0.1); }
.footer-logo { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.footer-logo .logo-mark { width: 38px; height: 38px; font-size: 14px; }
.footer-logo .logo-text { font-size: 17px; color: #fff; }
.footer-desc { font-size: 14px; color: rgba(255,255,255,0.55); line-height: 1.7; max-width: 380px; margin: 0; }
.site-footer h4 { font-size: 15px; font-weight: 700; color: rgba(255,255,255,0.9); margin: 0 0 16px; }
.footer-links { list-style: none; padding: 0; margin: 0; }
.footer-links li { margin-bottom: 10px; }
.footer-links a { color: rgba(255,255,255,0.55); font-size: 14px; transition: var(--transition); }
.footer-links a:hover { color: var(--primary); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; padding: 20px 0; flex-wrap: wrap; gap: 8px; }
.footer-bottom span { font-size: 13px; color: rgba(255,255,255,0.4); }
.footer-icp { display: inline-flex; align-items: center; gap: 6px; }
.footer-icp i { font-size: 12px; color: rgba(249,115,22,0.7); }

/* Section intro strip */
.strip-section { background: #fff; padding: 0; border-bottom: 1px solid var(--border); }
.strip-inner { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 16px 0; flex-wrap: wrap; }
.strip-list { display: flex; align-items: center; gap: 24px; flex-wrap: wrap; }
.strip-item { display: flex; align-items: center; gap: 8px; font-size: 14px; color: var(--text-body); }
.strip-item i { color: var(--success); font-size: 13px; }
.strip-tag { background: var(--dark); color: #fff; font-size: 13px; padding: 6px 16px; border-radius: 999px; font-weight: 500; display: inline-flex; align-items: center; gap: 7px; }
.strip-tag i { color: var(--primary); font-size: 12px; }

/* CTA additional */
.back-home-link { display: inline-flex; align-items: center; gap: 8px; font-size: 14px; color: var(--text-body); margin-top: 28px; }
.back-home-link i { color: var(--primary); }
.back-home-link:hover { color: var(--primary); }

/* visibility helpers */
.nav-item:focus-visible, .cta-btn:focus-visible, .hamburger-btn:focus-visible, .drawer-close:focus-visible { outline: 2px solid var(--primary); outline-offset: 2px; }

@media screen and (max-width: 1023px) and (min-width: 768px) {
  .sidebar { width: 88px; }
  .sidebar .logo-text, .sidebar .nav-item span, .sidebar-bottom span { display: none; }
  .sidebar-logo { justify-content: center; padding: 0 0 24px; }
  .sidebar-nav { padding: 0 12px; }
  .nav-item { justify-content: center; padding: 14px 0; }
  .nav-item.active::before { left: -12px; }
  .main-content { margin-left: 88px; }
  .hero-stats { gap: 20px; }
  .alternate-row { gap: 40px; }
}
@media screen and (max-width: 767px) {
  .sidebar { display: none; }
  .mobile-topbar { display: flex; }
  .mobile-drawer, .mobile-drawer-overlay { display: flex; }
  .main-content { margin-left: 0; padding-top: 64px; }
  .category-hero { padding: 48px 0 52px; }
  .category-hero h1 { font-size: 34px; }
  .category-hero .lead { font-size: 15px; }
  .hero-visual { min-height: 200px; }
  .hero-stats { gap: 20px; margin-top: 24px; }
  .hero-stat-num { font-size: 22px; }
  .section { padding: 56px 0; }
  .section-head h2 { font-size: 26px; }
  .alternate-row { grid-template-columns: 1fr; gap: 32px; }
  .alternate-row.reverse .alternate-visual { order: 1; }
  .alternate-row.reverse .alternate-content { order: 2; }
  .alternate-visual img { height: 220px; }
  .feature-grid { grid-template-columns: 1fr; }
  .timeline-wrap::before { left: 14px; }
  .timeline-item { padding-left: 44px; }
  .timeline-dot { left: 9px; }
  .timeline-card { padding: 18px; }
  .faq-question h4 { font-size: 15px; }
  .faq-question { gap: 10px; }
  .faq-item { padding: 18px; }
  .cta-inner { padding: 40px 24px; }
  .cta-inner h2 { font-size: 24px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .strip-inner { flex-direction: column; align-items: flex-start; padding: 14px 0; }
  .strip-list { gap: 12px; }
}
@media screen and (max-width: 520px) {
  .container { padding: 0 16px; }
  .category-hero h1 { font-size: 28px; }
  .section { padding: 48px 0; }
  .section-head { margin-bottom: 32px; }
  .hero-stats { gap: 16px; }
  .hero-stat-num { font-size: 20px; }
  .alternate-visual img { height: 180px; }
  .alternate-content h3 { font-size: 19px; }
  .timeline-card h4 { font-size: 16px; }
  .cta-btn { width: 100%; justify-content: center; }
}