/* ===========================================
   I7U.CN 主样式 V3（对齐源站 B2 主题风格）
   - 紫色主色 #7c4dff
   - 极简顶栏 + 左侧固定图标侧边栏
   - 主内容区居中有限宽度
   - 白底卡片 + 圆角 + 轻阴影
   =========================================== */

/* 修正 Layui 图标字体路径（layui.css 引用 ../font/ 但字体在 lib/font/） */
@font-face {
  font-family: 'layui-icon';
  src: url('/static/lib/font/iconfont.eot?v=282');
  src: url('/static/lib/font/iconfont.eot?v=282#iefix') format('embedded-opentype'),
       url('/static/lib/font/iconfont.woff2?v=282') format('woff2'),
       url('/static/lib/font/iconfont.woff?v=282') format('woff'),
       url('/static/lib/font/iconfont.ttf?v=282') format('truetype'),
       url('/static/lib/font/iconfont.svg?v=282#layui-icon') format('svg');
}

:root {
  /* 主色（对齐源站 #4f6ef7） */
  --primary: #4f6ef7;
  --primary-hover: #3d5bdb;
  --primary-light: #eef2ff;
  /* 语义色 */
  --success: #34d399;
  --warning: #f59e0b;
  --danger: #f43f5e;
  /* 中性色（对齐源站蓝灰系） */
  --text: #1a1a2e;
  --text-light: #64748b;
  --text-muted: #94a3b8;
  --border: #f5f5f5;
  --bg: #f8fafc;
  --card-bg: #ffffff;
  /* 布局 */
  --sidebar-width: 64px;
  --header-height: 54px;
  --content-max: 800px;
  /* 圆角（对齐源站 8/12/16） */
  --radius-sm: 8px;
  --radius: 12px;
  --radius-lg: 16px;
  --gap: 10px;
  /* 间距（4的倍数） */
  --space-xs: 4px;
  --space-sm: 8px;
  --space: 12px;
  --space-lg: 16px;
  --space-xl: 24px;
  /* 阴影 */
  --shadow: 0 1px 3px rgba(0,0,0,0.04), 0 1px 2px rgba(0,0,0,0.06);
  --shadow-hover: 0 4px 12px rgba(0,0,0,0.06);
  /* 字体层级（对齐源站，整体小一号） */
  --text-xs: 11px;
  --text-sm: 12px;
  --text-base: 13px;
  --text-lg: 15px;
  --text-xl: 18px;
  --text-2xl: 24px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; scroll-padding-top: 80px; overflow-y: scroll; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 13px;
  line-height: 1.7;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
a { color: var(--text); text-decoration: none; transition: color .15s; }
a:hover { color: var(--primary); }
img { max-width: 100%; height: auto; vertical-align: middle; }

/* ===== 顶栏（全宽 fixed，内容居中容器） ===== */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-height);
  background: #fff;
  border-bottom: 1px solid var(--border);
  z-index: 100;
}
.site-header-inner {
  max-width: 1200px;
  margin: 0 auto;
  height: 100%;
  display: flex;
  align-items: center;
  padding: 0 20px;
}
.site-logo {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 18px;
  font-weight: 700;
  color: var(--primary);
}
.site-logo .logo-i7 { color: var(--primary); font-size: 22px; }
.site-logo .logo-cn { color: var(--text-muted); font-size: 13px; font-weight: 400; }
.site-header-right {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 13px;
}
.site-header-right a { color: var(--text-light); }
.site-header-right a:hover { color: var(--primary); }

/* ===== 主体布局（侧边栏 + 主内容紧靠，整体居中） ===== */
.site-body {
  display: flex;
  max-width: 1000px;
  margin: var(--header-height) auto 0;
  padding: 16px 20px;
  min-height: calc(100vh - var(--header-height));
}

/* ===== 左侧侧边栏（sticky，紧靠主内容） ===== */
.site-sidebar {
  position: sticky;
  top: calc(var(--header-height) + 16px);
  width: var(--sidebar-width);
  background: #fff;
  border-right: 1px solid var(--border);
  padding: 8px 0;
  flex-shrink: 0;
  align-self: flex-start;
  z-index: 90;
  height: fit-content;
}
.site-sidebar a {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 10px 4px;
  margin: 2px 6px;
  border-radius: 6px;
  color: var(--text-light);
  font-size: 12px;
  text-align: center;
  transition: all .15s;
}
.site-sidebar a i {
  font-size: 22px;
  line-height: 1;
}
.site-sidebar a:hover {
  background: var(--primary-light);
  color: var(--primary);
}
.site-sidebar a.active {
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 600;
}

/* ===== 主内容区 ===== */
.site-main {
  flex: 1;
  margin-left: 0;
  padding: 0 0 40px 16px;
  min-width: 0;
}
.site-container {
  /* 兼容旧引用 */
}

/* ===== 黄色提示条 ===== */
.site-tip {
  background: #fffbe6;
  border: 1px solid #ffe58f;
  color: #ad6800;
  padding: 8px 16px;
  border-radius: var(--radius);
  margin-bottom: 16px;
  font-size: 13px;
  display: flex;
  align-items: center;
  gap: 6px;
}

/* ===== Hero 轮播区 ===== */
.site-hero {
  position: relative;
  width: 100%;
  height: 280px;
  border-radius: var(--radius);
  overflow: hidden;
  margin-bottom: 14px;
  background: #4A90E2;
  box-shadow: var(--shadow);
}
.site-hero-track {
  position: relative;
  width: 100%;
  height: 100%;
}
.site-hero-slide {
  position: absolute;
  top: 0; left: 0;
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  padding: 32px 40px;
  color: #fff;
  opacity: 0;
  transition: opacity .6s ease;
  text-decoration: none;
  z-index: 1;
}
.site-hero-slide.active { opacity: 1; z-index: 2; }
.site-hero-slide::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  background: linear-gradient(135deg, rgba(0,0,0,.05) 0%, rgba(0,0,0,.25) 100%);
  z-index: 1;
}
.site-hero-img {
  position: absolute;
  top: 0; right: 0; bottom: 0;
  width: 50%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}
.site-hero-content {
  position: relative;
  z-index: 2;
  max-width: 60%;
}
.site-hero-content h2 {
  font-size: 26px;
  font-weight: 700;
  margin: 0 0 10px;
  color: #fff;
  text-shadow: 0 2px 8px rgba(0,0,0,.3);
  line-height: 1.3;
}
.site-hero-content p {
  font-size: 13px;
  color: rgba(255,255,255,.92);
  margin: 0;
  text-shadow: 0 1px 4px rgba(0,0,0,.3);
  line-height: 1.6;
}
.site-hero-btn {
  display: inline-block;
  margin-top: 16px;
  padding: 8px 24px;
  background: #fff;
  color: #4A90E2;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 500;
  text-decoration: none;
  transition: all .2s;
}
.site-hero-btn:hover { transform: translateY(-2px); box-shadow: 0 4px 12px rgba(0,0,0,.2); color: #4A90E2; }

.site-hero-dots {
  position: absolute;
  bottom: 12px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 6px;
  z-index: 5;
}
.site-hero-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(255,255,255,.5);
  cursor: pointer;
  transition: all .25s;
}
.site-hero-dot.active {
  width: 24px;
  border-radius: 4px;
  background: #fff;
}

.site-hero-arrow {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 36px;
  height: 36px;
  background: rgba(0,0,0,.3);
  color: #fff;
  border: none;
  border-radius: 50%;
  font-size: 18px;
  line-height: 1;
  cursor: pointer;
  opacity: 0;
  transition: all .25s;
  z-index: 5;
}
.site-hero:hover .site-hero-arrow { opacity: 1; }
.site-hero-arrow:hover { background: rgba(0,0,0,.5); }
.site-hero-prev { left: 12px; }
.site-hero-next { right: 12px; }

/* 无 banner 时的占位 */
.site-hero-placeholder {
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  background: linear-gradient(135deg, #4A90E2 0%, #7c4dff 100%);
}

/* ===== 区块 ===== */
.i7u-section {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 14px 16px;
  box-shadow: var(--shadow);
  margin-bottom: var(--gap);
}
.i7u-section-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 12px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--border);
}
.i7u-section-title {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 6px;
}
.i7u-section-title::before {
  content: '';
  display: inline-block;
  width: 3px;
  height: 14px;
  background: var(--primary);
  border-radius: 2px;
}
.i7u-section-more {
  font-size: 13px;
  color: var(--text-muted);
}
.i7u-section-more:hover { color: var(--primary); }
.i7u-section-more i { font-size: 12px; margin-left: 2px; }

/* ===== 推荐专题（横版卡片） ===== */
.i7u-topic-list { display: flex; flex-direction: column; gap: 12px; }
.i7u-topic-row {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px;
  background: #fafafa;
  border-radius: var(--radius);
  transition: all .2s;
}
.i7u-topic-row:hover {
  background: #f5f5f5;
  transform: translateX(2px);
}
.i7u-topic-icon {
  width: 56px;
  height: 56px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  color: #fff;
  flex-shrink: 0;
}
.i7u-topic-info { flex: 1; min-width: 0; }
.i7u-topic-name {
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 4px;
}
.i7u-topic-desc {
  font-size: 12px;
  color: var(--text-muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.i7u-topic-count {
  font-size: 12px;
  color: var(--text-muted);
  white-space: nowrap;
  flex-shrink: 0;
}
.i7u-topic-count i { color: var(--primary); margin-right: 2px; }

/* ===== 资源网格（卡片） ===== */
.i7u-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 10px;
}
.i7u-card {
  display: block;
  background: #fafafa;
  border-radius: var(--radius);
  overflow: hidden;
  transition: all .2s;
}
.i7u-card:hover {
  background: #f5f5f5;
  box-shadow: var(--shadow-hover);
  transform: translateY(-2px);
}
.i7u-card-cover {
  position: relative;
  width: 100%;
  padding-top: 66.66%; /* 3:2 */
  background: #f0f0f0;
  overflow: hidden;
}
.i7u-card-cover img {
  position: absolute;
  top: 0; left: 0; width: 100%; height: 100%;
  object-fit: cover;
}
.i7u-card-cover .placeholder {
  position: absolute; top: 0; left: 0; right: 0; bottom: 0;
  display: flex; align-items: center; justify-content: center;
  background: #f5f5f5;
  color: #ccc;
  font-size: 36px;
}
.i7u-card-tag {
  position: absolute;
  top: 8px;
  left: 8px;
  background: var(--primary);
  color: #fff;
  font-size: 11px;
  padding: 2px 8px;
  border-radius: 3px;
  font-weight: 500;
}
.i7u-card-tag.paid,
.i7u-card-tag.vip {
  background: #f59e0b;
  color: #fff;
  font-weight: 600;
  letter-spacing: 1px;
}
.i7u-card-body { padding: 8px 10px 10px; }
.i7u-card-title {
  font-size: 13px;
  font-weight: 500;
  color: var(--text);
  margin-bottom: 4px;
  overflow: hidden;
  text-overflow: ellipsis;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  min-height: 36px;
  line-height: 1.4;
}
.i7u-card-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 12px;
  color: var(--text-muted);
}
.i7u-card-cat { display: flex; align-items: center; gap: 3px; }
.i7u-card-cat i { color: var(--primary); }

/* ===== 空状态 ===== */
.i7u-empty {
  text-align: center;
  padding: 40px 0;
  color: var(--text-muted);
  font-size: 13px;
}
.i7u-empty i { font-size: 48px; color: #ddd; display: block; margin-bottom: 12px; }
.i7u-empty .text { font-size: 13px; }

/* ===== 加载更多 ===== */
.i7u-loadmore {
  text-align: center;
  padding: 16px;
  color: var(--text-muted);
  font-size: 13px;
}
.i7u-loadmore.loading i { color: var(--primary); }
.i7u-loadmore a { color: var(--primary); }

/* ===== 面包屑 ===== */
.i7u-breadcrumb {
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 16px;
}
.i7u-breadcrumb a { color: var(--text-muted); }
.i7u-breadcrumb a:hover { color: var(--primary); }
.i7u-breadcrumb .sep { margin: 0 8px; color: #ccc; }

/* ===== 详情页 ===== */
.i7u-detail-title {
  font-size: 22px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 12px;
  line-height: 1.4;
}
.i7u-detail-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 24px;
  font-size: 13px;
  color: var(--text-light);
  margin-bottom: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border);
}
.i7u-detail-meta span { display: flex; align-items: center; gap: 4px; }
.i7u-detail-meta i { color: var(--primary); }
.i7u-rating-display { color: #f59e0b !important; }

.i7u-detail-cover {
  width: 100%;
  max-height: 500px;
  object-fit: cover;
  border-radius: var(--radius);
  margin-bottom: 16px;
}

.i7u-detail-desc {
  font-size: 13px;
  line-height: 1.6;
  color: var(--text);
  white-space: pre-line;
  word-break: break-word;
  margin: 0;
}

/* ===== 网盘链接 ===== */
.i7u-link-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}
.i7u-link-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  background: #fafafa;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}
.i7u-link-disk { display: flex; align-items: center; gap: 12px; }
.i7u-link-disk .disk-icon {
  width: 40px; height: 40px;
  border-radius: 6px;
  display: flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 600; font-size: 13px;
}
.i7u-link-disk.baidu .disk-icon { background: #1296db; }
.i7u-link-disk.quark .disk-icon { background: #6366f1; }
.i7u-link-disk.aliyun .disk-icon { background: #ff6a00; }
.i7u-link-disk.xunlei .disk-icon { background: #1ba0e2; }
.i7u-link-disk.pan115 .disk-icon { background: #52c41a; }
.i7u-link-disk.lanzou .disk-icon { background: #1890ff; }
.i7u-link-disk.tianyi .disk-icon { background: #eb2f96; }
.i7u-link-disk.weiyun .disk-icon { background: #12b7f5; }
.i7u-link-disk.pan123 .disk-icon { background: #722ed1; }
.i7u-link-disk.ucpan .disk-icon { background: #fa541c; }
.i7u-link-disk.pan139 .disk-icon { background: #13c2c2; }
.i7u-link-disk.others .disk-icon { background: #999; }
.i7u-link-actions { display: flex; gap: 8px; }
.i7u-link-code {
  background: #fffbe6;
  padding: 1px 6px;
  border-radius: 3px;
  font-family: monospace;
  color: #d48806;
  margin-left: 4px;
}

/* ===== 标签 ===== */
.i7u-tag-list { display: flex; flex-wrap: wrap; gap: 8px; }
.i7u-tag {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 5px 12px;
  background: #f5f5f5;
  border: 1px solid #e8e8e8;
  border-radius: 16px;
  font-size: 13px;
  color: var(--text-light);
  transition: all .15s;
}
.i7u-tag:hover {
  background: var(--primary-light);
  color: var(--primary);
  border-color: var(--primary);
}

/* ===== 评分 ===== */
.i7u-rating-box {
  padding: 16px;
  background: #fffbe6;
  border: 1px solid #ffe58f;
  border-radius: var(--radius);
}
.i7u-rating-stars {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
}
.i7u-rating-stars .layui-icon {
  font-size: 24px;
  color: #ddd;
  cursor: pointer;
  transition: color .15s;
}
.i7u-rating-stars .layui-icon.layui-icon-star-fill { color: #f59e0b; }
.i7u-rating-stars .layui-icon:hover { color: #fbbf24; }
.i7u-rating-text { font-size: 13px; color: var(--text); margin-left: 8px; }
.i7u-rating-your { font-size: 12px; color: var(--success); margin-left: 8px; }

/* ===== FAQ ===== */
.i7u-faq-list { display: flex; flex-direction: column; gap: 10px; }
.i7u-faq-item {
  padding: 12px 14px;
  background: #f9f9f9;
  border-left: 3px solid var(--primary);
  border-radius: 0 var(--radius) var(--radius) 0;
}
.i7u-faq-q {
  font-size: 13px;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 4px;
}
.i7u-faq-q i { color: var(--primary); margin-right: 4px; }
.i7u-faq-a { font-size: 13px; color: var(--text-light); line-height: 1.7; }

/* ===== 资讯区块（首页） ===== */
.i7u-news-block { display: flex; flex-direction: column; }
.i7u-news-line {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 0;
  border-bottom: 1px dashed var(--border);
}
.i7u-news-line:last-child { border-bottom: none; }
.i7u-news-line-title {
  font-size: 13px;
  color: var(--text);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
  margin-right: 16px;
}
.i7u-news-line:hover .i7u-news-line-title { color: var(--primary); }
.i7u-news-line-date { font-size: 12px; color: var(--text-muted); flex-shrink: 0; }

/* ===== 资讯列表（/news） ===== */
.i7u-news-list { display: flex; flex-direction: column; gap: 14px; }
.i7u-news-item {
  display: flex;
  gap: 16px;
  padding: 16px;
  background: #fafafa;
  border-radius: var(--radius);
  transition: all .15s;
}
.i7u-news-item:hover { background: #f5f5f5; }
.i7u-news-cover { width: 180px; height: 110px; border-radius: 6px; overflow: hidden; flex-shrink: 0; background: #eee; }
.i7u-news-cover img { width: 100%; height: 100%; object-fit: cover; }
.i7u-news-body { flex: 1; min-width: 0; }
.i7u-news-title { font-size: 15px; font-weight: 600; color: var(--text); margin-bottom: 6px; }
.i7u-news-item:hover .i7u-news-title { color: var(--primary); }
.i7u-news-summary { font-size: 13px; color: var(--text-light); line-height: 1.6; margin-bottom: 8px; }
.i7u-news-meta { font-size: 12px; color: var(--text-muted); display: flex; gap: 12px; }

/* ===== 友情链接 ===== */
.i7u-friend-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}
.i7u-friend-links a {
  font-size: 13px;
  color: var(--text-light);
  padding: 4px 12px;
  background: #f5f5f5;
  border-radius: 4px;
  transition: all .15s;
}
.i7u-friend-links a:hover { background: var(--primary-light); color: var(--primary); }

/* ===== 热门分类入口 ===== */
.i7u-hotcat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 10px;
}
.i7u-hotcat-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 14px 8px;
  background: #fafafa;
  border-radius: var(--radius);
  color: var(--text);
  text-align: center;
  transition: all .15s;
}
.i7u-hotcat-card i { font-size: 24px; color: var(--primary); }
.i7u-hotcat-card span { font-size: 13px; }
.i7u-hotcat-card:hover {
  background: var(--primary-light);
  color: var(--primary);
  transform: translateY(-2px);
}

/* ===== 横向滚动网格 ===== */
.i7u-grid-scroll {
  display: flex;
  flex-wrap: nowrap;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  padding-bottom: 8px;
}
.i7u-grid-scroll::-webkit-scrollbar { height: 4px; }
.i7u-grid-scroll::-webkit-scrollbar-thumb { background: #d1d5db; border-radius: 2px; }

/* ===== Footer ===== */
.site-footer {
  text-align: center;
  padding: 20px;
  color: var(--text-muted);
  font-size: 12px;
  border-top: 1px solid var(--border);
  margin-top: 40px;
  background: #fff;
}
.site-footer a { color: var(--text-muted); margin: 0 6px; }
.site-footer a:hover { color: var(--primary); }

/* ===== 移动端底部导航 ===== */
.mobile-nav { display: none; }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  :root { --content-max: 100%; }
  .site-main { padding: 16px; }
}

@media (max-width: 768px) {
  /* 侧边栏隐藏，改底部导航 */
  .site-sidebar { display: none; }
  .site-body { padding: 8px; }
  .site-main { padding: 8px; margin-left: 0; padding-bottom: 70px; }

  /* 底部导航 */
  .mobile-nav {
    display: flex;
    position: fixed;
    bottom: 0; left: 0; right: 0;
    background: #fff;
    border-top: 1px solid var(--border);
    z-index: 100;
    padding: 6px 0;
    padding-bottom: calc(6px + env(safe-area-inset-bottom, 0));
  }
  .mobile-nav a {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    font-size: 11px;
    color: var(--text-muted);
    text-decoration: none;
    padding: 4px 0;
  }
  .mobile-nav a i { font-size: 18px; }
  .mobile-nav a.active { color: var(--primary); }

  /* 顶栏精简 */
  .logo-cn { display: none; }
  .site-header-inner { padding: 0 12px; }
  .site-header-right a span:not(.layui-icon) { display: none; }

  /* Hero 高度降低 */
  .site-hero { height: 180px; margin-bottom: 10px; }
  .site-hero-slide { padding: 20px; }
  .site-hero-content { max-width: 100%; }
  .site-hero-content h2 { font-size: 18px; margin-bottom: 6px; }
  .site-hero-content p { font-size: 13px; }
  .site-hero-arrow { display: none; }

  /* 卡片网格 2 列 */
  .i7u-grid { grid-template-columns: repeat(2, 1fr); gap: 8px; }
  .i7u-card-title { font-size: 13px; }
  .i7u-card-meta { font-size: 11px; }

  /* 网盘链接上下排列 */
  .i7u-link-item { flex-direction: column; align-items: stretch; gap: 8px; }
  .i7u-link-actions { width: 100%; margin-top: 4px; }
  .i7u-link-actions .layui-btn { width: 100%; }

  /* 详情页 */
  .i7u-detail-cover { max-height: 200px; }
  .i7u-detail-desc { font-size: 13px; }

  /* 专题 */
  .i7u-topic-row { padding: 10px; }
  .i7u-topic-icon { width: 44px; height: 44px; font-size: 18px; }
  .i7u-news-item { flex-direction: column; }
  .i7u-news-cover { width: 100%; height: 160px; }

  /* 热门分类 */
  .i7u-hotcat-grid { gap: 8px; }
  .i7u-hotcat-card { padding: 12px 8px; }
  .i7u-hotcat-card i { font-size: 24px; }
  .i7u-hotcat-card span { font-size: 12px; }

  /* footer 精简 */
  .site-footer { padding: 16px 12px; font-size: 11px; }
}

@media (max-width: 480px) {
  .i7u-grid { grid-template-columns: repeat(2, 1fr); gap: 8px; }
  .i7u-section { padding: 12px; margin-bottom: 10px; }
  .i7u-section-title { font-size: 15px; }
  .site-hero { height: 160px; }
  .site-hero-content h2 { font-size: 18px; }
}

/* ===========================================
   通用工具类（备用，可逐步替换内联样式）
   =========================================== */
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-between { display: flex; align-items: center; justify-content: space-between; }
.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }
.mt-16 { margin-top: 16px; }
.mt-12 { margin-top: 12px; }
.mb-16 { margin-bottom: 16px; }