/* ============================================================
   K12 资源站全局样式 · 精致蓝白设计（仿国内一流教育资源站）
   主色 #2563EB | 圆角分级 6/10/14/20/999 | 大留白 | 微阴影
   ============================================================ */
:root {
  /* 主色阶 - 精致蓝色系统 */
  --primary: #2563EB;
  --primary-hover: #1D4ED8;
  --primary-deep: #1E40AF;
  --primary-light: #EFF6FF;
  --primary-lighter: #F5F9FF;
  --primary-border: rgba(37, 99, 235, 0.28);
  --primary-shadow: rgba(37, 99, 235, 0.18);
  --primary-text: #1E40AF;
  
  /* 中性灰阶（slate）- 更柔和的层次 */
  --text: #0F172A;
  --text-sub: #334155;
  --text-weak: #64748B;
  --bg: #FFFFFF;
  --bg-soft: #F8FAFC;
  --bg-card: #F1F5F9;
  --border: #E2E8F0;
  --border-light: #F1F5F9;
  --border-dark: #CBD5E1;
  
  /* 圆角分级 - 精致分级 */
  --radius-xs: 6px;
  --radius-sm: 10px;
  --radius: 12px;
  --radius-lg: 14px;
  --radius-xl: 20px;
  --radius-pill: 999px;
  
  /* 阴影分级 - 更细腻的层次 */
  --shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.04);
  --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.05);
  --shadow-md: 0 6px 16px rgba(15, 23, 42, 0.06);
  --shadow-lg: 0 12px 32px rgba(15, 23, 42, 0.08);
  --shadow-xl: 0 24px 48px rgba(15, 23, 42, 0.10);
  --shadow-hover: 0 16px 40px rgba(37, 99, 235, 0.12);
  --shadow-primary: 0 8px 20px rgba(37, 99, 235, 0.25);
  
  /* 尺寸 - 更精细的间距系统 */
  --container-max: 1800px;
  --navbar-height: 72px;
  --footer-max-width: 1800px;
  --spacing: 16px;
  --spacing-2: 32px;
  --spacing-3: 48px;
  --spacing-4: 64px;
  
  /* 动画曲线 - 更流畅的过渡 */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
  --transition: all 0.28s var(--ease);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
*::-webkit-scrollbar { width: 10px; height: 10px; }
*::-webkit-scrollbar-track { background: var(--bg-soft); }
*::-webkit-scrollbar-thumb { background: var(--border); border-radius: var(--radius-pill); }
*::-webkit-scrollbar-thumb:hover { background: var(--text-weak); }

::selection { background: rgba(37, 99, 235, 0.15); color: var(--primary-deep); }

html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  color: var(--text);
  background: var(--bg);
  line-height: 1.65;
  font-size: 16px;
  min-height: 100vh;
}

a { color: var(--primary); text-decoration: none; transition: color 0.28s var(--ease); }
a:hover { color: var(--primary-hover); }

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

h1, h2, h3, h4, h5 { color: var(--text); letter-spacing: -0.01em; line-height: 1.3; }

.container { max-width: var(--container-max); margin: 0 auto; padding: 0 32px; }
@media (max-width: 1200px) { .container { padding: 0 24px; } }
@media (max-width: 768px) { .container { padding: 0 16px; } }

/* ============================================================
   顶部导航 - 精致悬浮效果
   ============================================================ */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--border-light);
  transition: box-shadow 0.28s var(--ease), background 0.28s var(--ease);
}
.site-header.scrolled {
  background: rgba(255, 255, 255, 0.96);
  box-shadow: var(--shadow-sm);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: var(--navbar-height); gap: 32px;
}
.brand {
  display: flex; align-items: center; gap: 12px;
  color: var(--text); font-weight: 700; font-size: 18px;
  flex-shrink: 0; transition: opacity 0.2s var(--ease);
}
.brand:hover { opacity: 0.88; }
.brand-logo {
  width: 40px; height: 40px; border-radius: var(--radius-sm);
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-deep) 100%);
  color: #fff; display: flex; align-items: center; justify-content: center; font-size: 22px;
  box-shadow: var(--shadow-primary);
}
.brand-logo-img {
  height: 44px; width: auto; max-width: 180px; object-fit: contain; display: block;
}
.brand-name { color: var(--text); font-weight: 700; letter-spacing: -0.02em; }

.main-nav { display: flex; align-items: center; gap: 4px; flex: 1; justify-content: center; }
.main-nav a {
  position: relative;
  color: var(--text-sub); padding: 8px 16px; border-radius: var(--radius-sm);
  font-size: 15px; font-weight: 500; transition: all 0.28s var(--ease);
}
.main-nav a::after {
  content: ""; position: absolute; left: 50%; bottom: 2px; transform: translateX(-50%);
  width: 0; height: 2px; background: var(--primary); border-radius: 2px;
  transition: width 0.28s var(--ease);
}
.main-nav a:hover { color: var(--primary); background: var(--primary-light); }
.main-nav a:hover::after,
.main-nav a.active::after { width: 18px; }
.main-nav a.active { color: var(--primary); }

.header-actions { display: flex; align-items: center; gap: 12px; flex-shrink: 0; }
.header-search {
  position: relative; width: 240px;
}
.header-search input {
  width: 100%; height: 40px; padding: 0 40px 0 16px;
  background: var(--bg-soft); border: 1px solid transparent; border-radius: var(--radius-pill);
  font-size: 14px; color: var(--text); outline: none; transition: all 0.28s var(--ease);
}
.header-search input::placeholder { color: var(--text-weak); }
.header-search input:focus {
  background: var(--bg); border-color: var(--primary); box-shadow: 0 0 0 4px var(--primary-light);
}
.header-search button {
  position: absolute; right: 4px; top: 50%; transform: translateY(-50%);
  width: 32px; height: 32px; background: transparent; border: 0; border-radius: 50%;
  color: var(--text-weak); cursor: pointer; font-size: 16px; display: flex; align-items: center; justify-content: center;
  transition: all 0.28s var(--ease);
}
.header-search button:hover { background: var(--primary); color: #fff; }

.menu-toggle {
  display: none; width: 40px; height: 40px;
  background: transparent; border: 1px solid var(--border); border-radius: var(--radius-sm);
  cursor: pointer; color: var(--text); font-size: 20px;
  align-items: center; justify-content: center;
}

/* ============================================================
   主体通用 - 精致排版
   ============================================================ */
.site-main { min-height: 60vh; padding: 40px 0 80px; }
.section { margin-top: 72px; }
.section:first-of-type { margin-top: 0; }
.section-head {
  display: flex; align-items: flex-end; justify-content: space-between;
  margin-bottom: 28px; gap: 16px;
}
.section-title {
  font-size: 28px; font-weight: 700; color: var(--text); letter-spacing: -0.02em;
  display: flex; align-items: center; gap: 12px;
}
.section-title::before {
  content: ""; width: 4px; height: 24px; background: var(--primary); border-radius: 2px;
}
.section-sub { font-size: 14px; color: var(--text-weak); margin-top: 6px; }
.section-more {
  color: var(--primary); font-size: 14px; font-weight: 500;
  display: inline-flex; align-items: center; gap: 4px;
}
.section-more:hover { gap: 8px; }

/* ============================================================
   首页 Hero Banner - 精致渐变与层次
   ============================================================ */
.hero {
  position: relative; padding: 72px 0 64px;
  background:
    radial-gradient(ellipse at top right, rgba(37, 99, 235, 0.08), transparent 60%),
    radial-gradient(ellipse at bottom left, rgba(37, 99, 235, 0.06), transparent 60%),
    linear-gradient(180deg, var(--primary-light) 0%, var(--bg) 100%);
  text-align: center; overflow: hidden;
}
.hero::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(37, 99, 235, 0.04) 0%, transparent 40%),
    radial-gradient(circle at 80% 70%, rgba(37, 99, 235, 0.04) 0%, transparent 40%);
  pointer-events: none;
}
.hero-inner { position: relative; max-width: 720px; margin: 0 auto; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 6px 14px; background: rgba(37, 99, 235, 0.08);
  color: var(--primary); border-radius: var(--radius-pill);
  font-size: 13px; font-weight: 500; margin-bottom: 20px;
}
.hero-title {
  font-size: 48px; font-weight: 800; color: var(--text);
  letter-spacing: -0.03em; line-height: 1.15; margin-bottom: 16px;
}
.hero-title em { font-style: normal; color: var(--primary); }
.hero-sub {
  font-size: 17px; color: var(--text-sub); margin-bottom: 36px;
  max-width: 540px; margin-left: auto; margin-right: auto;
}
.hero-search {
  display: flex; max-width: 580px; margin: 0 auto 20px;
  background: var(--bg); border-radius: var(--radius-pill);
  box-shadow: var(--shadow-lg); padding: 6px;
  border: 1px solid var(--border-light);
}
.hero-search input {
  flex: 1; height: 48px; padding: 0 20px;
  border: 0; background: transparent; font-size: 15px;
  color: var(--text); outline: none;
}
.hero-search input::placeholder { color: var(--text-weak); }
.hero-search button {
  height: 48px; padding: 0 28px;
  background: var(--primary); color: #fff; border: 0; border-radius: var(--radius-pill);
  font-size: 15px; font-weight: 600; cursor: pointer;
  box-shadow: var(--shadow-primary); transition: all 0.28s var(--ease);
  display: inline-flex; align-items: center; gap: 6px;
}
.hero-search button:hover {
  background: var(--primary-hover); transform: translateY(-1px);
  box-shadow: 0 12px 28px rgba(37, 99, 235, 0.35);
}
.hero-hot {
  display: flex; align-items: center; justify-content: center; gap: 8px; flex-wrap: wrap;
  font-size: 13px; color: var(--text-weak);
}
.hero-hot strong { color: var(--text-sub); font-weight: 500; }
.hero-hot a {
  padding: 4px 12px; background: var(--bg); border: 1px solid var(--border);
  color: var(--text-sub); border-radius: var(--radius-pill); transition: all 0.28s var(--ease);
}
.hero-hot a:hover {
  background: var(--primary); border-color: var(--primary); color: #fff;
  transform: translateY(-1px);
}

/* ============================================================
   学段入口 - 精致卡片设计
   ============================================================ */
.entry-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
}
.entry-card {
  display: flex; flex-direction: column; gap: 10px;
  padding: 28px 24px; background: var(--bg);
  border: 1px solid var(--border); border-radius: var(--radius-lg);
  color: var(--text); transition: all 0.3s var(--ease);
  position: relative; overflow: hidden;
}
.entry-card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: var(--primary); transform: scaleX(0); transform-origin: left;
  transition: transform 0.3s var(--ease);
}
.entry-card:hover {
  transform: translateY(-4px); border-color: var(--primary-border);
  box-shadow: var(--shadow-hover);
}
.entry-card:hover::before { transform: scaleX(1); }
.entry-icon {
  width: 52px; height: 52px; border-radius: var(--radius);
  background: var(--primary-light); color: var(--primary);
  display: flex; align-items: center; justify-content: center; font-size: 26px;
  transition: all 0.3s var(--ease);
}
.entry-card:hover .entry-icon {
  background: var(--primary); color: #fff;
  transform: rotate(-8deg) scale(1.08);
}
.entry-title { font-size: 18px; font-weight: 700; color: var(--text); }
.entry-desc { font-size: 13px; color: var(--text-weak); }
.entry-meta {
  display: inline-flex; align-items: center; gap: 4px;
  font-size: 12px; color: var(--primary); font-weight: 600;
  margin-top: 4px;
}

/* ============================================================
   资源类型入口卡片（wangke 首页 · 按资源类型浏览）
   ============================================================ */
.res-type-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px;
}
.res-type-card {
  display: flex; align-items: center; gap: 16px;
  padding: 22px 20px; background: var(--bg);
  border: 1px solid var(--border); border-radius: var(--radius-lg);
  color: var(--text); text-decoration: none;
  transition: all 0.25s var(--ease);
  position: relative; overflow: hidden;
}
.res-type-card::before {
  content: ""; position: absolute; top: 0; left: 0; right: 0; height: 3px;
  background: currentColor; transform: scaleX(0); transform-origin: left;
  transition: transform 0.3s var(--ease); opacity: 0.85;
}
.res-type-card:hover {
  transform: translateY(-3px);
  border-color: var(--primary-border);
  box-shadow: var(--shadow-hover);
}
.res-type-card:hover::before { transform: scaleX(1); }
.res-type-icon {
  flex-shrink: 0; width: 50px; height: 50px;
  display: flex; align-items: center; justify-content: center;
  border-radius: var(--radius); font-size: 24px;
  transition: all 0.25s var(--ease);
}
.res-type-info { flex: 1; min-width: 0; }
.res-type-name {
  font-size: 17px; font-weight: 700; color: var(--text);
  margin-bottom: 4px;
}
.res-type-desc {
  font-size: 13px; color: var(--text-weak); line-height: 1.5;
}
.res-type-arrow {
  font-size: 18px; color: var(--text-weak);
  transition: all 0.25s var(--ease);
}
.res-type-card:hover .res-type-arrow {
  transform: translateX(4px); color: var(--primary);
}
.res-type-card:hover .res-type-name { color: var(--primary); }

.res-type-card.type-keben .res-type-icon { background: #EFF6FF; color: #2563EB; }
.res-type-card.type-shijuan .res-type-icon { background: #FFF7ED; color: #EA580C; }
.res-type-card.type-wangke .res-type-icon { background: #F0FDF4; color: #16A34A; }
.res-type-card.type-jiaofu .res-type-icon { background: #FAF5FF; color: #9333EA; }

/* ============================================================
   特色区块（图标网格）- 精致网格布局
   ============================================================ */
.features {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px;
}
.feature {
  display: flex; flex-direction: column; gap: 10px;
  padding: 24px; background: var(--bg-soft); border-radius: var(--radius-lg);
  transition: all 0.3s var(--ease);
}
.feature:hover {
  background: var(--bg); box-shadow: var(--shadow-md); transform: translateY(-2px);
}
.feature-icon {
  width: 40px; height: 40px; border-radius: var(--radius-sm);
  background: var(--primary); color: #fff;
  display: flex; align-items: center; justify-content: center; font-size: 20px;
}
.feature-title { font-size: 15px; font-weight: 600; color: var(--text); }
.feature-desc { font-size: 13px; color: var(--text-weak); line-height: 1.6; }

/* 通用提示 - 精致提示框 */
.tips {
  color: var(--text-weak); text-align: center; padding: 24px;
  background: var(--bg-soft); border-radius: var(--radius); font-size: 14px;
}

/* ============================================================
   面包屑 - 精致导航
   ============================================================ */
.breadcrumb {
  display: flex; align-items: center; gap: 6px;
  font-size: 13px; color: var(--text-weak); margin-bottom: 24px;
  padding: 12px 16px; background: var(--bg-soft); border-radius: var(--radius-sm);
}
.breadcrumb a {
  color: var(--text-sub); display: inline-flex; align-items: center; gap: 4px;
}
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb i { font-size: 14px; color: var(--text-weak); }
.breadcrumb > span { color: var(--text); font-weight: 500; }

/* ============================================================
   页面标题 - 精致标题设计
   ============================================================ */
.page-title {
  font-size: 28px; font-weight: 700; margin-bottom: 24px;
  color: var(--text); letter-spacing: -0.02em;
  display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap;
}
.page-title small {
  font-size: 14px; color: var(--text-weak); font-weight: 400;
  padding: 4px 10px; background: var(--bg-soft); border-radius: var(--radius-pill);
}

/* ============================================================
   Footer - 精致页脚设计
   ============================================================ */
.site-footer {
  background: var(--bg-soft);
  border-top: 1px solid var(--border-light);
  padding: 64px 0 24px; margin-top: 96px;
}
.footer-inner {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 48px;
  padding-bottom: 40px; border-bottom: 1px solid var(--border);
}
.footer-brand {
  font-size: 18px; font-weight: 700; color: var(--text);
  display: flex; align-items: center; gap: 8px; margin-bottom: 14px;
}
.footer-brand i { color: var(--primary); font-size: 22px; }
.footer-slogan {
  color: var(--text-weak); font-size: 13px; line-height: 1.8; max-width: 320px;
  margin-bottom: 16px;
}
.footer-social { display: flex; gap: 8px; }
.footer-social a {
  width: 36px; height: 36px; border-radius: var(--radius-sm);
  background: var(--bg); border: 1px solid var(--border); color: var(--text-sub);
  display: inline-flex; align-items: center; justify-content: center; font-size: 16px;
  transition: all 0.28s var(--ease);
}
.footer-social a:hover {
  background: var(--primary); border-color: var(--primary); color: #fff;
  transform: translateY(-2px);
}
.footer-col h4 {
  font-size: 14px; color: var(--text); margin-bottom: 16px; font-weight: 600;
}
.footer-col a {
  display: flex; align-items: center; gap: 6px;
  color: var(--text-sub); font-size: 13px; padding: 6px 0;
  transition: all 0.28s var(--ease);
}
.footer-col a:hover { color: var(--primary); transform: translateX(2px); }
.footer-col a i { font-size: 14px; color: var(--text-weak); }
.footer-col a:hover i { color: var(--primary); }

.friend-links {
  padding: 20px 0; font-size: 13px; color: var(--text-weak);
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
}
.friend-links strong { color: var(--text-sub); font-weight: 500; }
.friend-links a {
  color: var(--text-weak); padding: 4px 0;
}
.friend-links a:hover { color: var(--primary); }

.copyright {
  padding-top: 20px; color: var(--text-weak); font-size: 13px;
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 12px;
}
.copyright a { color: var(--text-weak); }
.copyright a:hover { color: var(--primary); }
.copyright .icp { display: inline-flex; align-items: center; gap: 4px; }

/* ============================================================
   回到顶部按钮 - 精致悬浮按钮
   ============================================================ */
.back-to-top {
  position: fixed; right: 32px; bottom: 32px;
  width: 48px; height: 48px; border-radius: 50%;
  background: var(--primary); color: #fff; border: 0;
  font-size: 22px; cursor: pointer;
  box-shadow: var(--shadow-primary);
  opacity: 0; visibility: hidden; transform: translateY(20px);
  transition: all 0.3s var(--ease); z-index: 50;
  display: flex; align-items: center; justify-content: center;
}
.back-to-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover {
  background: var(--primary-hover); transform: translateY(-4px);
  box-shadow: 0 12px 28px rgba(37, 99, 235, 0.4);
}

/* ============================================================
   移动端遮罩 & 抽屉菜单 - 精致移动端体验
   ============================================================ */
.menu-backdrop {
  position: fixed; inset: 0; background: rgba(15, 23, 42, 0.5);
  opacity: 0; visibility: hidden; transition: all 0.3s var(--ease); z-index: 200;
  backdrop-filter: blur(4px); -webkit-backdrop-filter: blur(4px);
}
.menu-backdrop.show { opacity: 1; visibility: visible; }
.mobile-menu {
  position: fixed; top: 0; right: -320px; bottom: 0; width: 300px;
  background: var(--bg); z-index: 201; padding: 24px;
  transition: right 0.3s var(--ease); overflow-y: auto;
  box-shadow: -10px 0 30px rgba(15, 23, 42, 0.15);
}
.mobile-menu.show { right: 0; }
.mobile-menu-close {
  position: absolute; top: 16px; right: 16px;
  width: 36px; height: 36px; background: var(--bg-soft); border: 0;
  border-radius: var(--radius-sm); cursor: pointer; color: var(--text-sub); font-size: 18px;
}
.mobile-menu h5 {
  font-size: 12px; color: var(--text-weak); text-transform: uppercase;
  letter-spacing: 0.1em; margin: 20px 0 10px;
}
.mobile-menu a {
  display: block; padding: 12px 14px; color: var(--text);
  border-radius: var(--radius-sm); font-size: 15px; font-weight: 500;
  transition: all 0.28s var(--ease);
}
.mobile-menu a:hover { background: var(--primary-light); color: var(--primary); }
.mobile-search {
  position: relative; margin-bottom: 16px;
}
.mobile-search input {
  width: 100%; height: 42px; padding: 0 44px 0 16px;
  background: var(--bg-soft); border: 1px solid transparent; border-radius: var(--radius-pill);
  font-size: 14px; outline: none;
}
.mobile-search input:focus { background: var(--bg); border-color: var(--primary); }
.mobile-search button {
  position: absolute; right: 6px; top: 50%; transform: translateY(-50%);
  width: 32px; height: 32px; background: var(--primary); color: #fff;
  border: 0; border-radius: 50%; cursor: pointer; font-size: 14px;
}

/* ============================================================
   响应式 - 精致响应式设计
   ============================================================ */
@media (max-width: 1200px) {
  .header-search { width: 200px; }
  .entry-grid { grid-template-columns: repeat(2, 1fr); }
  .features { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 992px) {
  :root { --navbar-height: 64px; }
  .hero-title { font-size: 40px; }
  .hero { padding: 56px 0 48px; }
  .entry-grid { grid-template-columns: repeat(2, 1fr); }
  .res-type-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-inner { grid-template-columns: 1fr 1fr; gap: 32px; }
  .section { margin-top: 56px; }
  .section-title { font-size: 24px; }
}
@media (max-width: 768px) {
  .main-nav, .header-search { display: none; }
  .menu-toggle { display: inline-flex; }
  .brand-name { font-size: 16px; }
  .brand-logo-img { height: 36px; }
  .hero { padding: 40px 0 36px; }
  .hero-title { font-size: 30px; }
  .hero-sub { font-size: 14px; margin-bottom: 24px; }
  .hero-search { padding: 4px; }
  .hero-search input { height: 42px; font-size: 14px; }
  .hero-search button { height: 42px; padding: 0 18px; font-size: 14px; }
  .entry-grid { grid-template-columns: 1fr 1fr; gap: 12px; }
  .entry-card { padding: 20px 16px; }
  .entry-icon { width: 44px; height: 44px; font-size: 22px; }
  .res-type-grid { grid-template-columns: 1fr; gap: 12px; }
  .res-type-card { padding: 16px; gap: 12px; }
  .res-type-icon { width: 44px; height: 44px; font-size: 22px; }
  .features { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr 1fr; gap: 24px; padding-bottom: 28px; }
  .site-footer { padding: 40px 0 20px; margin-top: 56px; }
  .copyright { flex-direction: column; align-items: flex-start; gap: 6px; }
  .back-to-top { right: 16px; bottom: 16px; width: 44px; height: 44px; }
  .site-main { padding: 24px 0 56px; }
  .section-head { flex-direction: column; align-items: flex-start; }
  .section-title { font-size: 22px; }
  .page-title { font-size: 22px; }
}
@media (max-width: 480px) {
  .hero-title { font-size: 26px; }
  .entry-grid { grid-template-columns: 1fr; }
  .res-type-grid { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; }
}

/* ============================================================
   组件类 - 精致组件样式
   ============================================================ */
.page-title i { color: var(--primary); }
.search-kw { color: var(--primary); }
.section-search { margin-top: 32px; }
.section-search-alt { margin-top: 48px; }
.dl-empty-icon { font-size: 32px; display: block; margin-bottom: 8px; }

/* .rel-list 在文章详情"相关推荐"区块需 card 化，覆盖侧栏默认紧凑样式 */
.block-rel .rel-list {
  background: var(--bg);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 20px 24px;
  box-shadow: var(--shadow-xs);
}