/* roulang page: index */
/* ===== 设计变量 ===== */
:root {
  --primary: #1a1a2e;
  --primary-light: #16213e;
  --primary-dark: #0f0f1a;
  --accent: #f0a500;
  --accent-light: #ffc83d;
  --accent-dark: #c98800;
  --bg-body: #f4f6fa;
  --bg-card: #ffffff;
  --bg-dark: #1a1a2e;
  --text-primary: #1a1a2e;
  --text-secondary: #4a4a6a;
  --text-light: #8a8aaa;
  --text-white: #f0f0f0;
  --border: #e0e3ec;
  --border-light: #f0f2f8;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --shadow-sm: 0 2px 8px rgba(26,26,46,0.06);
  --shadow-md: 0 8px 32px rgba(26,26,46,0.10);
  --shadow-lg: 0 20px 60px rgba(26,26,46,0.14);
  --shadow-accent: 0 4px 20px rgba(240,165,0,0.30);
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
  --nav-width: 260px;
  --header-height: 0px;
  --spacing-section: 5rem;
  --spacing-block: 2.5rem;
  --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== Reset & Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-family);
  background: var(--bg-body);
  color: var(--text-primary);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent-dark); }
a:focus-visible { outline: 3px solid var(--accent); outline-offset: 2px; border-radius: 4px; }
button, input, textarea { font-family: inherit; font-size: inherit; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; color: var(--text-primary); }
h1 { font-size: clamp(2rem, 4.5vw, 3.2rem); }
h2 { font-size: clamp(1.6rem, 3vw, 2.4rem); }
h3 { font-size: clamp(1.2rem, 2vw, 1.5rem); }
p { margin-bottom: 1rem; color: var(--text-secondary); }
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; }

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

/* ===== 左侧导航 (桌面) ===== */
.side-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--nav-width);
  height: 100vh;
  background: var(--primary);
  color: var(--text-white);
  display: flex;
  flex-direction: column;
  z-index: 1000;
  box-shadow: 2px 0 20px rgba(0,0,0,0.15);
  transition: transform var(--transition);
}
.side-nav .nav-brand {
  padding: 2rem 1.5rem 1.2rem;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.side-nav .nav-brand .logo-text {
  font-size: 1.25rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: 0.5px;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.side-nav .nav-brand .logo-text i {
  color: var(--accent);
  font-size: 1.5rem;
}
.side-nav .nav-brand .logo-sub {
  font-size: 0.75rem;
  color: rgba(255,255,255,0.5);
  margin-top: 0.25rem;
  letter-spacing: 1px;
}
.side-nav .nav-menu {
  flex: 1;
  padding: 1.5rem 0;
  overflow-y: auto;
}
.side-nav .nav-menu .nav-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: rgba(255,255,255,0.3);
  padding: 0.75rem 1.5rem 0.5rem;
  font-weight: 600;
}
.side-nav .nav-menu a {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.75rem 1.5rem;
  color: rgba(255,255,255,0.7);
  font-size: 0.95rem;
  font-weight: 500;
  transition: all var(--transition);
  border-left: 3px solid transparent;
}
.side-nav .nav-menu a i {
  width: 1.25rem;
  text-align: center;
  font-size: 1rem;
  color: rgba(255,255,255,0.4);
  transition: color var(--transition);
}
.side-nav .nav-menu a:hover,
.side-nav .nav-menu a.active {
  color: #fff;
  background: rgba(255,255,255,0.06);
  border-left-color: var(--accent);
}
.side-nav .nav-menu a:hover i,
.side-nav .nav-menu a.active i {
  color: var(--accent);
}
.side-nav .nav-footer {
  padding: 1.2rem 1.5rem;
  border-top: 1px solid rgba(255,255,255,0.06);
  font-size: 0.75rem;
  color: rgba(255,255,255,0.3);
  text-align: center;
}

/* ===== 主内容区 ===== */
.main-content {
  margin-left: var(--nav-width);
  flex: 1;
  min-height: 100vh;
  width: calc(100% - var(--nav-width));
}

/* ===== 移动端顶部栏 ===== */
.mobile-header {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 60px;
  background: var(--primary);
  z-index: 1100;
  padding: 0 1.2rem;
  align-items: center;
  justify-content: space-between;
  box-shadow: 0 2px 16px rgba(0,0,0,0.15);
}
.mobile-header .logo-text {
  font-size: 1.1rem;
  font-weight: 800;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}
.mobile-header .logo-text i { color: var(--accent); }
.mobile-header .menu-toggle {
  background: none;
  border: none;
  color: #fff;
  font-size: 1.5rem;
  cursor: pointer;
  padding: 0.25rem;
  transition: var(--transition);
}
.mobile-header .menu-toggle:hover { color: var(--accent); }
.mobile-header .menu-toggle:focus-visible { outline: 2px solid var(--accent); outline-offset: 4px; border-radius: 4px; }

/* ===== 移动端菜单遮罩 ===== */
.mobile-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.5);
  z-index: 1050;
  opacity: 0;
  transition: opacity var(--transition);
}
.mobile-overlay.open { opacity: 1; }

/* ===== Hero 区块 ===== */
.hero {
  position: relative;
  min-height: 85vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-light) 50%, var(--primary) 100%);
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-1.png') center center / cover no-repeat;
  opacity: 0.30;
  mix-blend-mode: overlay;
}
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 30% 50%, rgba(240,165,0,0.08) 0%, transparent 60%);
}
.hero .hero-bg-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(26,26,46,0.5) 0%, rgba(26,26,46,0.85) 100%);
  z-index: 1;
}
.hero .container { position: relative; z-index: 2; text-align: center; }
.hero .hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: rgba(240,165,0,0.15);
  color: var(--accent-light);
  padding: 0.4rem 1.2rem;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 0.5px;
  margin-bottom: 1.5rem;
  border: 1px solid rgba(240,165,0,0.2);
}
.hero h1 {
  color: #fff;
  font-weight: 800;
  max-width: 800px;
  margin: 0 auto 1.2rem;
  text-shadow: 0 2px 20px rgba(0,0,0,0.3);
}
.hero h1 .highlight { color: var(--accent); }
.hero .hero-sub {
  font-size: clamp(1rem, 1.8vw, 1.2rem);
  color: rgba(255,255,255,0.75);
  max-width: 640px;
  margin: 0 auto 2.2rem;
  line-height: 1.8;
}
.hero .hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  justify-content: center;
}
.hero .hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 2rem;
  justify-content: center;
  margin-top: 3rem;
  padding-top: 2.5rem;
  border-top: 1px solid rgba(255,255,255,0.08);
}
.hero .hero-stats .stat-item { text-align: center; }
.hero .hero-stats .stat-num {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--accent);
  line-height: 1.2;
}
.hero .hero-stats .stat-label {
  font-size: 0.8rem;
  color: rgba(255,255,255,0.5);
  letter-spacing: 0.5px;
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.75rem 1.8rem;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
  line-height: 1.4;
  text-align: center;
  justify-content: center;
}
.btn:focus-visible { outline: 3px solid var(--accent); outline-offset: 3px; }
.btn-primary {
  background: var(--accent);
  color: var(--primary-dark);
  box-shadow: var(--shadow-accent);
}
.btn-primary:hover { background: var(--accent-light); color: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 8px 30px rgba(240,165,0,0.40); }
.btn-outline {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255,255,255,0.3);
}
.btn-outline:hover { border-color: var(--accent); color: var(--accent); background: rgba(240,165,0,0.08); transform: translateY(-2px); }
.btn-white {
  background: #fff;
  color: var(--primary);
  box-shadow: var(--shadow-sm);
}
.btn-white:hover { background: var(--accent-light); color: var(--primary-dark); transform: translateY(-2px); }

/* ===== 板块通用 ===== */
.section { padding: var(--spacing-section) 0; }
.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto var(--spacing-block);
}
.section-header h2 { margin-bottom: 0.75rem; }
.section-header .section-sub {
  color: var(--text-secondary);
  font-size: 1.05rem;
  line-height: 1.8;
}
.section-header .section-tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--accent);
  margin-bottom: 0.75rem;
}

/* ===== 卡片 ===== */
.card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  transition: all var(--transition);
  overflow: hidden;
}
.card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
.card .card-img { width: 100%; aspect-ratio: 16/9; object-fit: cover; }
.card .card-body { padding: 1.5rem; }
.card .card-tag {
  display: inline-block;
  font-size: 0.7rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--accent);
  background: rgba(240,165,0,0.10);
  padding: 0.2rem 0.8rem;
  border-radius: 50px;
  margin-bottom: 0.6rem;
}
.card .card-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  line-height: 1.4;
}
.card .card-title a { color: var(--text-primary); }
.card .card-title a:hover { color: var(--accent); }
.card .card-text { font-size: 0.9rem; color: var(--text-secondary); margin-bottom: 0.8rem; }
.card .card-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  font-size: 0.8rem;
  color: var(--text-light);
  align-items: center;
}
.card .card-meta i { margin-right: 0.25rem; }

/* ===== 网格 ===== */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.8rem; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 1.8rem; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; }

/* ===== 特色/优势卡片 ===== */
.feature-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 2rem 1.8rem;
  border: 1px solid var(--border-light);
  box-shadow: var(--shadow-sm);
  transition: all var(--transition);
  text-align: center;
}
.feature-card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.feature-card .feat-icon {
  width: 56px;
  height: 56px;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-light) 100%);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1.2rem;
  font-size: 1.4rem;
  color: var(--primary-dark);
  box-shadow: 0 4px 16px rgba(240,165,0,0.25);
}
.feature-card h3 { font-size: 1.1rem; margin-bottom: 0.6rem; }
.feature-card p { font-size: 0.9rem; margin-bottom: 0; }

/* ===== 分类入口卡片 ===== */
.cat-card {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--bg-card);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-light);
  transition: all var(--transition);
  cursor: pointer;
}
.cat-card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
.cat-card .cat-img {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
  transition: transform var(--transition);
}
.cat-card:hover .cat-img { transform: scale(1.03); }
.cat-card .cat-body { padding: 1.5rem; }
.cat-card .cat-body h3 { font-size: 1.05rem; margin-bottom: 0.4rem; }
.cat-card .cat-body p { font-size: 0.85rem; color: var(--text-light); margin-bottom: 0; }
.cat-card .cat-count {
  font-size: 0.75rem;
  color: var(--accent);
  font-weight: 600;
}

/* ===== 流程步骤 ===== */
.steps { display: flex; flex-wrap: wrap; gap: 1.5rem; justify-content: center; counter-reset: step; }
.step-item {
  flex: 1;
  min-width: 180px;
  max-width: 240px;
  text-align: center;
  position: relative;
  counter-increment: step;
}
.step-item::before {
  content: counter(step);
  width: 44px;
  height: 44px;
  background: var(--accent);
  color: var(--primary-dark);
  font-weight: 800;
  font-size: 1.1rem;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 1rem;
  box-shadow: 0 4px 16px rgba(240,165,0,0.25);
}
.step-item h4 { font-size: 1rem; margin-bottom: 0.4rem; }
.step-item p { font-size: 0.85rem; color: var(--text-light); margin-bottom: 0; }
.step-item:not(:last-child)::after {
  content: '→';
  position: absolute;
  right: -1.2rem;
  top: 1rem;
  font-size: 1.4rem;
  color: var(--accent);
  opacity: 0.5;
}

/* ===== FAQ ===== */
.faq-list { max-width: 800px; margin: 0 auto; display: flex; flex-direction: column; gap: 0.75rem; }
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition);
}
.faq-item:hover { border-color: var(--accent); }
.faq-item .faq-q {
  padding: 1.2rem 1.5rem;
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  color: var(--text-primary);
  transition: var(--transition);
  user-select: none;
}
.faq-item .faq-q i {
  color: var(--accent);
  transition: transform var(--transition);
  font-size: 0.9rem;
}
.faq-item.open .faq-q i { transform: rotate(180deg); }
.faq-item .faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s ease;
  padding: 0 1.5rem;
  color: var(--text-secondary);
  font-size: 0.92rem;
  line-height: 1.8;
}
.faq-item.open .faq-a {
  max-height: 300px;
  padding: 0 1.5rem 1.2rem;
}

/* ===== CTA ===== */
.cta-section {
  background: var(--primary);
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: url('/assets/images/backpic/back-2.png') center center / cover no-repeat;
  opacity: 0.08;
}
.cta-section .container { position: relative; z-index: 1; text-align: center; }
.cta-section h2 { color: #fff; margin-bottom: 1rem; }
.cta-section p { color: rgba(255,255,255,0.65); max-width: 560px; margin: 0 auto 2rem; }

/* ===== 页脚 ===== */
.site-footer {
  background: var(--primary-dark);
  color: rgba(255,255,255,0.5);
  padding: 3rem 0 1.5rem;
}
.site-footer .footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 2rem;
  margin-bottom: 2rem;
}
.site-footer .footer-brand .logo-text {
  font-size: 1.1rem;
  font-weight: 800;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.8rem;
}
.site-footer .footer-brand .logo-text i { color: var(--accent); }
.site-footer .footer-brand p { font-size: 0.85rem; color: rgba(255,255,255,0.4); max-width: 280px; }
.site-footer h4 {
  font-size: 0.85rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 1rem;
  letter-spacing: 0.5px;
}
.site-footer ul li { margin-bottom: 0.5rem; }
.site-footer ul a {
  font-size: 0.85rem;
  color: rgba(255,255,255,0.45);
  transition: var(--transition);
}
.site-footer ul a:hover { color: var(--accent); }
.site-footer .footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.06);
  padding-top: 1.5rem;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.3);
}
.site-footer .footer-bottom a { color: rgba(255,255,255,0.3); }
.site-footer .footer-bottom a:hover { color: var(--accent); }

/* ===== 标签 ===== */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.25rem 0.8rem;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 600;
  background: rgba(240,165,0,0.10);
  color: var(--accent-dark);
}
.tag i { font-size: 0.65rem; }

/* ===== 列表 ===== */
.list-check { display: flex; flex-direction: column; gap: 0.5rem; }
.list-check li {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  font-size: 0.92rem;
  color: var(--text-secondary);
}
.list-check li i { color: var(--accent); margin-top: 0.2rem; font-size: 0.8rem; }

/* ===== 分隔线 ===== */
.divider {
  width: 60px;
  height: 3px;
  background: var(--accent);
  border-radius: 4px;
  margin: 1rem auto;
}

/* ===== 响应式 ===== */

/* 平板 & 小屏桌面 */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .site-footer .footer-grid { grid-template-columns: 1fr 1fr; }
}

/* 移动端 */
@media (max-width: 768px) {
  :root { --nav-width: 0px; --spacing-section: 3rem; }
  .side-nav { display: none; }
  .side-nav.open { display: flex; transform: translateX(0); }
  .side-nav { transform: translateX(-100%); }
  .side-nav.open { transform: translateX(0); }
  .main-content { margin-left: 0; width: 100%; }
  .mobile-header { display: flex; }
  .main-content { padding-top: 60px; }
  .hero { min-height: 70vh; padding: 3rem 0; }
  .hero .hero-stats { gap: 1.2rem; }
  .hero .hero-stats .stat-item { flex: 1; min-width: 80px; }
  .grid-3 { grid-template-columns: 1fr; gap: 1.2rem; }
  .grid-2 { grid-template-columns: 1fr; gap: 1.2rem; }
  .grid-4 { grid-template-columns: 1fr 1fr; gap: 1rem; }
  .steps { flex-direction: column; align-items: center; }
  .step-item { max-width: 100%; }
  .step-item:not(:last-child)::after { content: '↓'; right: auto; bottom: -1.2rem; top: auto; left: 50%; transform: translateX(-50%); }
  .site-footer .footer-grid { grid-template-columns: 1fr; gap: 1.5rem; }
  .site-footer .footer-bottom { flex-direction: column; gap: 0.5rem; text-align: center; }
  .section-header { padding: 0 1rem; }
}

/* 小手机 */
@media (max-width: 520px) {
  .grid-4 { grid-template-columns: 1fr; }
  .hero .hero-actions { flex-direction: column; align-items: center; }
  .hero .hero-actions .btn { width: 100%; max-width: 260px; }
  .card .card-body { padding: 1rem; }
  .feature-card { padding: 1.5rem 1.2rem; }
  .faq-item .faq-q { padding: 1rem 1.2rem; font-size: 0.92rem; }
  .faq-item .faq-a { padding: 0 1.2rem; font-size: 0.85rem; }
}

/* ===== 辅助 ===== */
.text-center { text-align: center; }
.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mb-1 { margin-bottom: 1rem; }
.mb-2 { margin-bottom: 2rem; }
.gap-1 { gap: 1rem; }
.flex-center { display: flex; align-items: center; justify-content: center; }

/* roulang page: category1 */
:root {
  --primary: #1a2a6c;
  --primary-light: #3a4a8c;
  --secondary: #e74c3c;
  --secondary-light: #f05a4a;
  --accent: #f39c12;
  --bg-dark: #0d1b2a;
  --bg-main: #f4f6fb;
  --bg-card: #ffffff;
  --text-primary: #1a1a2e;
  --text-secondary: #4a4a6a;
  --text-light: #7a7a9a;
  --text-white: #ffffff;
  --border-color: #e0e4ed;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --shadow-sm: 0 2px 8px rgba(0,0,0,0.06);
  --shadow-md: 0 6px 24px rgba(0,0,0,0.1);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.12);
  --transition: all 0.3s cubic-bezier(0.4,0,0.2,1);
  --nav-width: 230px;
  --header-height: 0px;
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
}
*, *::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-main);
  color: var(--text-primary);
  line-height: 1.7;
  min-height: 100vh;
  display: flex;
}
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--secondary); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button, input, select, textarea { font-family: inherit; font-size: inherit; }
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}
/* ===== 左侧导航 ===== */
.side-nav {
  position: fixed;
  top: 0;
  left: 0;
  width: var(--nav-width);
  height: 100vh;
  background: var(--bg-dark);
  color: var(--text-white);
  display: flex;
  flex-direction: column;
  padding: 28px 0;
  z-index: 1000;
  transition: var(--transition);
  overflow-y: auto;
}
.side-nav .nav-brand {
  padding: 0 22px 24px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  margin-bottom: 18px;
}
.side-nav .logo-text {
  font-size: 1.15rem;
  font-weight: 700;
  color: #fff;
  display: flex;
  align-items: center;
  gap: 10px;
  letter-spacing: 0.5px;
}
.side-nav .logo-text i { color: var(--accent); font-size: 1.3rem; }
.side-nav .logo-sub {
  font-size: 0.7rem;
  color: rgba(255,255,255,0.45);
  letter-spacing: 2px;
  margin-top: 4px;
  margin-left: 34px;
  text-transform: uppercase;
}
.side-nav .nav-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: rgba(255,255,255,0.35);
  padding: 0 22px;
  margin-bottom: 8px;
}
.side-nav .nav-menu { flex: 1; padding: 0 12px; }
.side-nav .nav-menu a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  color: rgba(255,255,255,0.7);
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition);
  margin-bottom: 2px;
}
.side-nav .nav-menu a i { width: 20px; text-align: center; font-size: 1.05rem; color: rgba(255,255,255,0.4); }
.side-nav .nav-menu a:hover { background: rgba(255,255,255,0.08); color: #fff; }
.side-nav .nav-menu a:hover i { color: var(--accent); }
.side-nav .nav-menu a.active { background: rgba(255,255,255,0.12); color: #fff; box-shadow: inset 3px 0 0 var(--accent); }
.side-nav .nav-menu a.active i { color: var(--accent); }
.side-nav .nav-footer {
  padding: 18px 22px 0;
  border-top: 1px solid rgba(255,255,255,0.08);
  margin-top: 16px;
  font-size: 0.75rem;
  color: rgba(255,255,255,0.35);
  display: flex;
  align-items: center;
  gap: 8px;
}
.side-nav .nav-footer i { color: var(--accent); font-size: 0.9rem; }
/* ===== 主内容区 ===== */
.main-wrapper {
  margin-left: var(--nav-width);
  flex: 1;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
.content-area { flex: 1; }
/* ===== Banner ===== */
.page-banner {
  background: linear-gradient(135deg, var(--bg-dark) 0%, var(--primary) 70%, var(--primary-light) 100%);
  padding: 60px 0 56px;
  position: relative;
  overflow: hidden;
}
.page-banner::before {
  content: '';
  position: absolute;
  top: 0; right: 0; bottom: 0; left: 0;
  background: url('/assets/images/backpic/back-1.png') center/cover no-repeat;
  opacity: 0.12;
  mix-blend-mode: overlay;
}
.page-banner .container { position: relative; z-index: 1; }
.page-banner h1 {
  font-size: 2.2rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: 1px;
  margin-bottom: 10px;
}
.page-banner h1 i { color: var(--accent); margin-right: 10px; }
.page-banner p {
  font-size: 1.05rem;
  color: rgba(255,255,255,0.75);
  max-width: 640px;
  line-height: 1.8;
}
.page-banner .breadcrumb {
  display: flex;
  gap: 6px;
  font-size: 0.85rem;
  color: rgba(255,255,255,0.5);
  margin-bottom: 14px;
  align-items: center;
}
.page-banner .breadcrumb a { color: rgba(255,255,255,0.65); }
.page-banner .breadcrumb a:hover { color: var(--accent); }
.page-banner .breadcrumb span { color: rgba(255,255,255,0.85); }
/* ===== 板块通用 ===== */
.section { padding: 64px 0; }
.section-alt { background: var(--bg-card); }
.section-title {
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 10px;
}
.section-title i { color: var(--secondary); font-size: 1.4rem; }
.section-subtitle {
  font-size: 1rem;
  color: var(--text-secondary);
  margin-bottom: 36px;
  max-width: 620px;
  line-height: 1.8;
}
/* ===== 卡片网格 ===== */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}
.card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  overflow: hidden;
  transition: var(--transition);
}
.card:hover { box-shadow: var(--shadow-md); transform: translateY(-4px); }
.card-img {
  width: 100%;
  aspect-ratio: 16/9;
  object-fit: cover;
  background: #e8ecf4;
}
.card-body { padding: 22px; }
.card-body h3 {
  font-size: 1.1rem;
  font-weight: 600;
  margin-bottom: 8px;
  color: var(--text-primary);
}
.card-body p {
  font-size: 0.92rem;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-bottom: 14px;
}
.card-tags { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 12px; }
.tag {
  display: inline-block;
  font-size: 0.72rem;
  padding: 3px 12px;
  border-radius: 20px;
  background: #eef1f8;
  color: var(--text-secondary);
  font-weight: 500;
  transition: var(--transition);
}
.tag-primary { background: var(--primary); color: #fff; }
.tag-accent { background: var(--accent); color: #fff; }
.tag-secondary { background: var(--secondary); color: #fff; }
.tag:hover { opacity: 0.8; transform: translateY(-1px); }
.card-footer {
  padding: 14px 22px;
  border-top: 1px solid var(--border-color);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: var(--text-light);
}
.read-more {
  color: var(--primary);
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: var(--transition);
}
.read-more:hover { color: var(--secondary); gap: 10px; }
/* ===== 步骤流程 ===== */
.steps-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.step-card {
  background: var(--bg-card);
  border-radius: var(--radius-md);
  padding: 28px 22px;
  text-align: center;
  box-shadow: var(--shadow-sm);
  border: 1px solid var(--border-color);
  transition: var(--transition);
  position: relative;
}
.step-card:hover { box-shadow: var(--shadow-md); transform: translateY(-3px); }
.step-number {
  width: 44px; height: 44px;
  background: var(--primary);
  color: #fff;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem; font-weight: 700;
  margin: 0 auto 14px;
  box-shadow: 0 4px 12px rgba(26,42,108,0.25);
}
.step-card h4 { font-size: 1rem; font-weight: 600; margin-bottom: 6px; }
.step-card p { font-size: 0.88rem; color: var(--text-secondary); line-height: 1.7; }
/* ===== 策略清单 ===== */
.strategy-list { display: flex; flex-direction: column; gap: 16px; }
.strategy-item {
  background: var(--bg-card);
  border-radius: var(--radius-sm);
  padding: 20px 24px;
  border: 1px solid var(--border-color);
  display: flex; align-items: center; gap: 16px;
  transition: var(--transition);
  cursor: default;
}
.strategy-item:hover { box-shadow: var(--shadow-sm); border-color: var(--primary-light); }
.strategy-rank {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--bg-main);
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; font-size: 0.95rem; color: var(--primary);
  flex-shrink: 0;
}
.strategy-rank.gold { background: var(--accent); color: #fff; }
.strategy-rank.silver { background: #bdc3c7; color: #fff; }
.strategy-rank.bronze { background: #e67e22; color: #fff; }
.strategy-info { flex: 1; }
.strategy-info h4 { font-size: 1rem; font-weight: 600; margin-bottom: 2px; }
.strategy-info p { font-size: 0.88rem; color: var(--text-secondary); }
.strategy-tag { font-size: 0.75rem; padding: 4px 14px; border-radius: 20px; background: #eef1f8; color: var(--text-secondary); font-weight: 500; flex-shrink: 0; }
/* ===== FAQ ===== */
.faq-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.faq-item {
  background: var(--bg-card);
  border-radius: var(--radius-sm);
  padding: 20px 22px;
  border: 1px solid var(--border-color);
  transition: var(--transition);
}
.faq-item:hover { box-shadow: var(--shadow-sm); }
.faq-item h4 {
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 6px;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}
.faq-item h4 i { color: var(--secondary); font-size: 0.9rem; }
.faq-item p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  line-height: 1.7;
}
/* ===== CTA ===== */
.cta-section {
  background: linear-gradient(135deg, var(--primary) 0%, var(--bg-dark) 100%);
  padding: 52px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}
.cta-section::before {
  content: '';
  position: absolute;
  top: 0; right: 0; bottom: 0; left: 0;
  background: url('/assets/images/backpic/back-2.png') center/cover no-repeat;
  opacity: 0.07;
  mix-blend-mode: overlay;
}
.cta-section .container { position: relative; z-index: 1; }
.cta-section h2 {
  font-size: 1.6rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 10px;
}
.cta-section p {
  font-size: 1rem;
  color: rgba(255,255,255,0.7);
  max-width: 540px;
  margin: 0 auto 24px;
  line-height: 1.8;
}
.btn-group { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 32px;
  border-radius: 50px;
  font-weight: 600;
  font-size: 0.95rem;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
}
.btn-primary { background: var(--secondary); color: #fff; box-shadow: 0 4px 16px rgba(231,76,60,0.35); }
.btn-primary:hover { background: #c0392b; transform: translateY(-2px); box-shadow: 0 6px 24px rgba(231,76,60,0.45); color: #fff; }
.btn-outline { background: transparent; color: #fff; border: 2px solid rgba(255,255,255,0.4); }
.btn-outline:hover { border-color: #fff; background: rgba(255,255,255,0.1); color: #fff; transform: translateY(-2px); }
.btn-accent { background: var(--accent); color: #fff; box-shadow: 0 4px 16px rgba(243,156,18,0.35); }
.btn-accent:hover { background: #e67e22; transform: translateY(-2px); color: #fff; }
/* ===== 页脚 ===== */
.site-footer {
  background: var(--bg-dark);
  color: rgba(255,255,255,0.7);
  padding: 48px 0 28px;
  margin-top: 0;
}
.site-footer .footer-grid {
  display: grid;
  grid-template-columns: 1.8fr 1fr 1fr 1.2fr;
  gap: 40px;
  margin-bottom: 32px;
}
.site-footer h4 {
  color: #fff;
  font-size: 0.95rem;
  font-weight: 600;
  margin-bottom: 14px;
}
.site-footer ul li { margin-bottom: 8px; }
.site-footer ul li a {
  color: rgba(255,255,255,0.55);
  font-size: 0.88rem;
  transition: var(--transition);
}
.site-footer ul li a:hover { color: var(--accent); padding-left: 4px; }
.site-footer .footer-brand .logo-text {
  font-size: 1.1rem;
  font-weight: 700;
  color: #fff;
  margin-bottom: 8px;
  display: flex;
  align-items: center;
  gap: 8px;
}
.site-footer .footer-brand .logo-text i { color: var(--accent); }
.site-footer .footer-brand p { font-size: 0.88rem; color: rgba(255,255,255,0.5); max-width: 260px; line-height: 1.7; }
.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: 10px;
  font-size: 0.82rem;
  color: rgba(255,255,255,0.4);
}
.footer-bottom a { color: rgba(255,255,255,0.5); }
.footer-bottom a:hover { color: var(--accent); }
/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .faq-grid { grid-template-columns: 1fr; }
  .site-footer .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .side-nav {
    width: 100%;
    height: auto;
    position: relative;
    flex-direction: row;
    flex-wrap: wrap;
    padding: 12px 16px;
    align-items: center;
  }
  .side-nav .nav-brand { padding: 0; border: none; margin: 0; display: flex; align-items: center; gap: 8px; }
  .side-nav .nav-brand .logo-sub { display: none; }
  .side-nav .nav-label { display: none; }
  .side-nav .nav-menu {
    display: flex;
    gap: 6px;
    padding: 0;
    margin-left: auto;
    flex-wrap: wrap;
  }
  .side-nav .nav-menu a {
    padding: 6px 12px;
    font-size: 0.82rem;
    gap: 6px;
  }
  .side-nav .nav-menu a i { font-size: 0.85rem; }
  .side-nav .nav-footer { display: none; }
  .main-wrapper { margin-left: 0; }
  .page-banner { padding: 36px 0 32px; }
  .page-banner h1 { font-size: 1.5rem; }
  .page-banner p { font-size: 0.92rem; }
  .section { padding: 36px 0; }
  .section-title { font-size: 1.25rem; }
  .grid-3, .grid-2 { grid-template-columns: 1fr; gap: 20px; }
  .steps-grid { grid-template-columns: 1fr 1fr; gap: 16px; }
  .site-footer .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .btn-group { flex-direction: column; align-items: center; }
}
@media (max-width: 520px) {
  .side-nav { padding: 10px 12px; }
  .side-nav .logo-text { font-size: 0.95rem; }
  .side-nav .nav-menu a { font-size: 0.72rem; padding: 4px 8px; }
  .side-nav .nav-menu a i { display: none; }
  .page-banner h1 { font-size: 1.2rem; }
  .steps-grid { grid-template-columns: 1fr; }
  .strategy-item { flex-wrap: wrap; gap: 10px; }
  .container { padding: 0 16px; }
}

/* roulang page: article */
/* ===== 设计变量 ===== */
:root {
  --primary: #0b0e1a;
  --primary-light: #1a1f35;
  --primary-mid: #252d4a;
  --accent: #f0a500;
  --accent-hover: #d49400;
  --accent-red: #e94560;
  --bg: #f0f2f5;
  --card-bg: #ffffff;
  --text: #1a1a2e;
  --text-light: #6c757d;
  --text-white: #f0f2f5;
  --border: #e1e4e8;
  --radius-sm: 6px;
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 4px 20px rgba(0,0,0,0.08);
  --shadow-hover: 0 8px 36px rgba(0,0,0,0.14);
  --shadow-nav: 2px 0 20px rgba(0,0,0,0.3);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --font: 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', system-ui, -apple-system, sans-serif;
  --nav-width: 240px;
  --header-height: 64px;
  --max-width: 1200px;
}

/* ===== Reset / Base ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
a { color: var(--accent); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent-hover); }
img { max-width: 100%; height: auto; display: block; }
button, input, textarea { font-family: inherit; font-size: inherit; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; letter-spacing: -0.01em; }

/* ===== 容器 ===== */
.app-layout {
  display: flex;
  min-height: 100vh;
}
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== 左侧导航 ===== */
.side-nav {
  width: var(--nav-width);
  min-height: 100vh;
  background: var(--primary);
  color: var(--text-white);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 0;
  left: 0;
  z-index: 1000;
  box-shadow: var(--shadow-nav);
  padding: 0;
  transition: var(--transition);
}
.nav-brand {
  padding: 28px 20px 20px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.logo-text {
  font-size: 20px;
  font-weight: 800;
  color: var(--accent);
  display: flex;
  align-items: center;
  gap: 10px;
  letter-spacing: 0.5px;
}
.logo-text i { font-size: 22px; }
.logo-sub {
  font-size: 11px;
  letter-spacing: 3px;
  color: rgba(255,255,255,0.35);
  margin-top: 6px;
  padding-left: 32px;
  text-transform: uppercase;
  font-weight: 300;
}
.nav-menu {
  flex: 1;
  padding: 16px 12px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  overflow-y: auto;
}
.nav-label {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: rgba(255,255,255,0.25);
  padding: 16px 12px 8px;
  font-weight: 600;
}
.nav-menu a {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 16px;
  border-radius: var(--radius);
  color: rgba(255,255,255,0.6);
  font-size: 15px;
  font-weight: 500;
  transition: var(--transition);
  text-decoration: none;
}
.nav-menu a i { width: 20px; text-align: center; font-size: 16px; }
.nav-menu a:hover {
  background: rgba(255,255,255,0.08);
  color: #fff;
}
.nav-menu a.active {
  background: var(--accent);
  color: var(--primary);
  font-weight: 700;
  box-shadow: 0 4px 16px rgba(240,165,0,0.35);
}
.nav-footer {
  padding: 18px 20px;
  border-top: 1px solid rgba(255,255,255,0.06);
  font-size: 12px;
  color: rgba(255,255,255,0.3);
  display: flex;
  align-items: center;
  gap: 8px;
}
.nav-footer i { font-size: 14px; color: var(--accent); }

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

/* ===== 文章 Hero ===== */
.article-hero {
  position: relative;
  padding: 80px 0 60px;
  background: var(--primary);
  background-image: url('/assets/images/backpic/back-1.png');
  background-size: cover;
  background-position: center;
  background-blend-mode: overlay;
  overflow: hidden;
}
.article-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(11,14,26,0.88) 0%, rgba(26,31,53,0.75) 100%);
  z-index: 1;
}
.article-hero .container {
  position: relative;
  z-index: 2;
}
.article-hero .breadcrumb {
  font-size: 13px;
  color: rgba(255,255,255,0.5);
  margin-bottom: 20px;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.article-hero .breadcrumb a { color: rgba(255,255,255,0.6); }
.article-hero .breadcrumb a:hover { color: var(--accent); }
.article-hero .breadcrumb span { color: rgba(255,255,255,0.35); }
.article-hero h1 {
  font-size: 38px;
  font-weight: 800;
  color: #fff;
  line-height: 1.25;
  max-width: 800px;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
}
.article-hero .hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 16px 28px;
  color: rgba(255,255,255,0.65);
  font-size: 14px;
}
.hero-meta .category-tag {
  display: inline-block;
  padding: 4px 14px;
  background: var(--accent);
  color: var(--primary);
  border-radius: 20px;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}
.hero-meta i { margin-right: 6px; opacity: 0.6; }

/* ===== 文章主体 ===== */
.article-main {
  flex: 1;
  padding: 48px 0 60px;
}
.article-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 40px;
}
.article-body {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 40px;
  box-shadow: var(--shadow);
}
.article-body .content {
  font-size: 16px;
  line-height: 1.9;
  color: var(--text);
}
.article-body .content p { margin-bottom: 1.4em; }
.article-body .content h2 { font-size: 24px; margin: 1.6em 0 0.6em; color: var(--primary); }
.article-body .content h3 { font-size: 20px; margin: 1.4em 0 0.5em; color: var(--primary-light); }
.article-body .content ul, .article-body .content ol { margin: 0 0 1.4em 1.6em; }
.article-body .content li { margin-bottom: 0.4em; }
.article-body .content img { border-radius: var(--radius-sm); margin: 1.2em 0; }
.article-body .content blockquote {
  border-left: 4px solid var(--accent);
  background: rgba(240,165,0,0.06);
  padding: 16px 24px;
  margin: 1.2em 0;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  color: var(--text-light);
  font-style: italic;
}
.article-body .content a { color: var(--accent-red); font-weight: 500; }
.article-body .content a:hover { text-decoration: underline; }
.article-not-found {
  text-align: center;
  padding: 60px 20px;
}
.article-not-found i { font-size: 56px; color: var(--border); margin-bottom: 20px; }
.article-not-found h2 { font-size: 28px; color: var(--primary); margin-bottom: 12px; }
.article-not-found p { color: var(--text-light); margin-bottom: 24px; font-size: 16px; }
.btn-back {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 28px;
  background: var(--accent);
  color: var(--primary);
  border-radius: var(--radius);
  font-weight: 700;
  font-size: 15px;
  transition: var(--transition);
  border: none;
  cursor: pointer;
}
.btn-back:hover { background: var(--accent-hover); color: var(--primary); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(240,165,0,0.35); }

/* ===== 侧边栏 ===== */
.article-sidebar {
  display: flex;
  flex-direction: column;
  gap: 28px;
}
.sidebar-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}
.sidebar-card h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 16px;
  padding-bottom: 10px;
  border-bottom: 2px solid var(--bg);
  display: flex;
  align-items: center;
  gap: 8px;
}
.sidebar-card h3 i { color: var(--accent); }
.sidebar-list li { margin-bottom: 10px; }
.sidebar-list a {
  display: flex;
  gap: 12px;
  align-items: flex-start;
  padding: 10px;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}
.sidebar-list a:hover { background: var(--bg); }
.sidebar-list .thumb {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-sm);
  object-fit: cover;
  flex-shrink: 0;
  background: var(--border);
}
.sidebar-list .info { flex: 1; min-width: 0; }
.sidebar-list .info .title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.4;
}
.sidebar-list .info .date {
  font-size: 12px;
  color: var(--text-light);
  margin-top: 4px;
}
.sidebar-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.sidebar-tags a {
  display: inline-block;
  padding: 5px 14px;
  background: var(--bg);
  border-radius: 20px;
  font-size: 13px;
  color: var(--text-light);
  transition: var(--transition);
}
.sidebar-tags a:hover { background: var(--accent); color: var(--primary); font-weight: 600; }

/* ===== 文章底部导航 ===== */
.article-nav-links {
  margin-top: 40px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}
.article-nav-links a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 20px;
  background: var(--bg);
  border-radius: var(--radius);
  font-size: 14px;
  color: var(--text);
  transition: var(--transition);
  font-weight: 500;
}
.article-nav-links a:hover { background: var(--accent); color: var(--primary); }

/* ===== 相关文章 ===== */
.related-section {
  margin-top: 48px;
}
.related-section h2 {
  font-size: 24px;
  font-weight: 800;
  color: var(--primary);
  margin-bottom: 28px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.related-section h2 i { color: var(--accent); }
.related-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
}
.related-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
  transition: var(--transition);
}
.related-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-hover); }
.related-card .card-img {
  width: 100%;
  height: 160px;
  object-fit: cover;
  background: var(--border);
}
.related-card .card-body { padding: 16px 18px 20px; }
.related-card .card-body .cat {
  font-size: 12px;
  color: var(--accent-red);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 6px;
}
.related-card .card-body h3 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text);
  line-height: 1.4;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.related-card .card-body p {
  font-size: 13px;
  color: var(--text-light);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.related-card .card-body .date {
  font-size: 12px;
  color: var(--text-light);
  margin-top: 10px;
}

/* ===== 页脚 ===== */
.site-footer {
  background: var(--primary);
  color: rgba(255,255,255,0.7);
  padding: 48px 0 0;
  margin-top: auto;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 36px;
  padding-bottom: 36px;
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.footer-brand .logo-text { font-size: 20px; margin-bottom: 12px; }
.footer-brand p { font-size: 14px; color: rgba(255,255,255,0.5); max-width: 320px; line-height: 1.7; }
.site-footer h4 {
  font-size: 14px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 16px;
  letter-spacing: 0.3px;
}
.site-footer ul li { margin-bottom: 10px; }
.site-footer ul a {
  font-size: 14px;
  color: rgba(255,255,255,0.55);
  transition: var(--transition);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.site-footer ul a:hover { color: var(--accent); padding-left: 4px; }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  padding: 20px 0;
  font-size: 13px;
  color: rgba(255,255,255,0.35);
}
.footer-bottom a { color: rgba(255,255,255,0.45); }
.footer-bottom a:hover { color: var(--accent); }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .article-layout { grid-template-columns: 1fr; }
  .article-sidebar { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .side-nav {
    width: 100%;
    min-height: auto;
    position: relative;
    flex-direction: row;
    flex-wrap: wrap;
    padding: 0 16px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.15);
  }
  .nav-brand { padding: 14px 0; border-bottom: none; flex: 1; }
  .nav-brand .logo-sub { display: none; }
  .nav-menu {
    flex-direction: row;
    padding: 0;
    gap: 4px;
    overflow-x: auto;
    width: 100%;
    order: 3;
    border-top: 1px solid rgba(255,255,255,0.06);
    padding: 8px 0;
  }
  .nav-label { display: none; }
  .nav-menu a {
    font-size: 13px;
    padding: 8px 14px;
    white-space: nowrap;
    flex-shrink: 0;
  }
  .nav-menu a i { display: none; }
  .nav-footer { display: none; }
  .main-content { margin-left: 0; }
  .article-hero { padding: 48px 0 36px; }
  .article-hero h1 { font-size: 26px; }
  .article-body { padding: 24px; }
  .article-sidebar { grid-template-columns: 1fr; }
  .related-grid { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}

@media (max-width: 520px) {
  .article-hero h1 { font-size: 22px; }
  .hero-meta { font-size: 13px; gap: 10px; }
  .article-body { padding: 16px; }
  .article-body .content { font-size: 15px; }
  .related-grid { grid-template-columns: 1fr; }
  .article-nav-links { flex-direction: column; }
  .article-nav-links a { width: 100%; justify-content: center; }
  .nav-menu a { font-size: 12px; padding: 6px 12px; }
}