:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --bg: #f5f7fa;
  --card: #ffffff;
  --text: #1f2937;
  --text-sub: #6b7280;
  --border: #e5e7eb;
  --danger: #dc2626;
  --success: #16a34a;
  --warn: #d97706;
  --radius: 10px;
  --shadow: 0 1px 3px rgba(0, 0, 0, .06);
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  font-size: 15px;
  line-height: 1.6;
  -webkit-text-size-adjust: 100%;
}

a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; display: block; }

.container { max-width: 1200px; margin: 0 auto; padding: 0 12px; }

/* ---------- 头部 ---------- */
.site-header {
  background: #fff;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 50;
}
.header-inner {
  display: flex;
  align-items: center;
  gap: 12px;
  height: 56px;
}
.logo { display: flex; align-items: center; gap: 8px; font-weight: 700; font-size: 18px; color: var(--text); }
.logo img { height: 28px; width: auto; }
.logo-mark {
  width: 30px; height: 30px; border-radius: 8px; background: var(--primary);
  color: #fff; display: flex; align-items: center; justify-content: center; font-size: 15px; font-weight: 700;
}
.nav { display: flex; align-items: center; gap: 16px; margin-left: auto; font-size: 14px; }
.nav a { color: var(--text-sub); }
.nav a:hover, .nav a.active { color: var(--primary); }
.nav-toggle { display: none; }

/* ---------- 搜索区 ---------- */
.hero {
  background: linear-gradient(135deg, var(--primary), #3b82f6);
  color: #fff;
  padding: 28px 0 32px;
  margin-bottom: 18px;
}
.hero h1 { font-size: 24px; margin: 0 0 4px; font-weight: 700; }
.hero p { margin: 0 0 16px; opacity: .9; font-size: 14px; }
.search-box { display: flex; gap: 8px; max-width: 680px; }
.search-box input {
  flex: 1; padding: 12px 14px; border: none; border-radius: var(--radius);
  font-size: 15px; outline: none; background: #fff;
}
.search-box button {
  padding: 0 22px; border: none; border-radius: var(--radius); background: #111827;
  color: #fff; font-size: 15px; cursor: pointer; font-weight: 600;
}
.hot-words { margin-top: 12px; font-size: 13px; display: flex; flex-wrap: wrap; gap: 8px; align-items: center; }
.hot-words a {
  background: rgba(255, 255, 255, .18); color: #fff; padding: 3px 10px;
  border-radius: 20px; font-size: 13px;
}
.hot-words a:hover { background: rgba(255, 255, 255, .32); }

/* ---------- 板块 ---------- */
.section { margin-bottom: 26px; }
.section-head {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 12px; padding-bottom: 8px; border-bottom: 2px solid var(--border);
}
.section-head h2 { font-size: 17px; margin: 0; font-weight: 700; }
.section-head .more { font-size: 13px; color: var(--text-sub); }

/* ---------- 分类入口 ---------- */
.cat-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px; }
.cat-item {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 12px 8px; text-align: center; color: var(--text); font-size: 13px;
}
.cat-item:hover { border-color: var(--primary); color: var(--primary); }
.cat-item .cat-name { font-weight: 600; display: block; }
.cat-item .cat-count { color: var(--text-sub); font-size: 12px; }

/* ---------- 资源卡片 ---------- */
.res-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.res-card {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; display: flex; flex-direction: column; transition: border-color .15s;
}
.res-card:hover { border-color: var(--primary); }
.res-cover {
  height: 110px; background: linear-gradient(135deg, #eef2ff, #e0f2fe);
  display: flex; align-items: center; justify-content: center; font-size: 26px; color: var(--primary); overflow: hidden;
}
.res-cover img { width: 100%; height: 100%; object-fit: cover; }
.res-body { padding: 10px; flex: 1; display: flex; flex-direction: column; }
.res-title {
  font-size: 14px; font-weight: 600; line-height: 1.45; margin: 0 0 6px;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}
.res-title a { color: var(--text); }
.res-title a:hover { color: var(--primary); }
.res-meta { font-size: 12px; color: var(--text-sub); margin-top: auto; display: flex; gap: 8px; flex-wrap: wrap; align-items: center; }
.res-tags { display: flex; gap: 6px; flex-wrap: wrap; margin-bottom: 6px; }
.tag-chip {
  background: #f1f5f9; color: var(--text-sub); font-size: 12px;
  padding: 1px 8px; border-radius: 4px;
}
.tag-chip:hover { background: #e0e7ff; color: var(--primary); }

.pan-badge {
  font-size: 11px; padding: 1px 6px; border-radius: 4px;
  background: #eff6ff; color: var(--primary); border: 1px solid #dbeafe;
}

/* ---------- 左侧分类栏 + 主内容 ---------- */
.layout-2col { display: grid; grid-template-columns: 200px 1fr; gap: 18px; align-items: start; }
.main-col { min-width: 0; }
.side { position: sticky; top: 72px; }
.side-box { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 10px 12px; }
.side-title { font-size: 13px; color: var(--text-sub); font-weight: 600; margin: 4px 6px 8px; }
.side-nav { display: flex; flex-direction: column; gap: 2px; max-height: calc(100vh - 160px); overflow-y: auto; }
.side-link { display: flex; align-items: center; justify-content: space-between; gap: 8px; padding: 7px 10px; border-radius: 8px; color: var(--text); font-size: 14px; }
.side-link:hover { background: #f3f4f6; color: var(--primary); }
.side-link.active { background: #eef2ff; color: var(--primary); font-weight: 600; }
.side-count { font-size: 12px; color: #9ca3af; }

/* ---------- 统计条 ---------- */
.stats-bar { display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px; margin-bottom: 20px; }
.stat-item { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 12px; text-align: center; }
.stat-num { font-size: 20px; font-weight: 700; color: var(--primary); }
.stat-label { font-size: 12px; color: var(--text-sub); }

/* ---------- 筛选 ---------- */
.filter-bar {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 12px; margin-bottom: 14px;
}
.filter-row { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin-bottom: 8px; }
.filter-row:last-child { margin-bottom: 0; }
.filter-label { font-size: 13px; color: var(--text-sub); min-width: 52px; }
.chip {
  padding: 4px 12px; border-radius: 20px; background: #f3f4f6; font-size: 13px; color: var(--text-sub);
  border: 1px solid transparent;
}
.chip.active { background: var(--primary); color: #fff; }
.chip:hover { border-color: var(--primary); }

/* ---------- 详情页 ---------- */
.detail-wrap { display: grid; grid-template-columns: 1fr 300px; gap: 16px; }
.detail-main, .detail-side {
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px;
}
.detail-title { font-size: 21px; margin: 0 0 10px; line-height: 1.4; }
.detail-meta { font-size: 13px; color: var(--text-sub); display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 14px; }
.detail-cover { width: 100%; max-height: 320px; object-fit: cover; border-radius: 8px; margin-bottom: 14px; }
.detail-summary { font-size: 15px; color: #374151; white-space: pre-wrap; }
.status-badge { font-size: 12px; padding: 2px 8px; border-radius: 4px; }
.status-normal { background: #dcfce7; color: #15803d; }
.status-pending { background: #fef3c7; color: #b45309; }
.status-invalid { background: #fee2e2; color: #b91c1c; }
.status-offline { background: #f3f4f6; color: #6b7280; }

/* 网盘按钮 */
.pan-list { margin: 16px 0; }
.pan-btn {
  display: flex; align-items: center; justify-content: space-between; gap: 10px;
  padding: 12px 14px; border-radius: var(--radius); border: 1px solid var(--border);
  background: #fff; margin-bottom: 10px;
}
.pan-btn:hover { border-color: var(--primary); background: #f8fafc; }
.pan-btn .pan-left { display: flex; flex-direction: column; }
.pan-btn .pan-name { font-weight: 600; color: var(--text); }
.pan-btn .pan-code { font-size: 12px; color: var(--text-sub); }
.pan-btn .pan-go {
  background: var(--primary); color: #fff; padding: 7px 18px; border-radius: 6px; font-size: 14px; font-weight: 600;
}
.pan-btn .pan-go:hover { background: var(--primary-dark); color: #fff; }
.promo-tag {
  font-size: 11px; background: #fff7ed; color: #c2410c; border: 1px solid #fed7aa;
  padding: 0 6px; border-radius: 4px; margin-left: 6px;
}

/* ---------- 分页 ---------- */
.pagination { display: flex; gap: 6px; justify-content: center; flex-wrap: wrap; margin: 20px 0; }
.pagination a, .pagination span {
  padding: 6px 12px; border: 1px solid var(--border); border-radius: 6px;
  background: #fff; font-size: 14px; color: var(--text-sub);
}
.pagination a:hover { border-color: var(--primary); color: var(--primary); }
.pagination .current { background: var(--primary); color: #fff; border-color: var(--primary); }

/* ---------- 公告与页脚 ---------- */
.notice-box {
  background: #fffbeb; border: 1px solid #fde68a; border-radius: var(--radius);
  padding: 12px 14px; font-size: 14px; color: #92400e; margin-bottom: 20px;
}
.site-footer {
  background: #fff; border-top: 1px solid var(--border); margin-top: 30px; padding: 22px 0;
  font-size: 13px; color: var(--text-sub);
}
.footer-links { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 8px; }
.footer-copy { line-height: 1.8; }

/* ---------- 空状态 ---------- */
.empty { text-align: center; padding: 40px 12px; color: var(--text-sub); }
.empty .icon { font-size: 40px; margin-bottom: 8px; }

/* ---------- 提示页 ---------- */
.notice-page {
  max-width: 520px; margin: 60px auto; background: #fff; border: 1px solid var(--border);
  border-radius: var(--radius); padding: 30px; text-align: center;
}
.notice-page h1 { font-size: 20px; margin: 0 0 10px; }
.notice-page p { color: var(--text-sub); margin-bottom: 18px; }

/* ---------- 移动端 ---------- */
@media (max-width: 900px) {
  .detail-wrap { grid-template-columns: 1fr; }
  .res-grid { grid-template-columns: repeat(3, 1fr); }
  .cat-grid { grid-template-columns: repeat(3, 1fr); }
  .stats-bar { grid-template-columns: repeat(3, 1fr); }
  .layout-2col { grid-template-columns: 1fr; }
  .side { position: static; order: -1; }
  .side-box { background: transparent; border: none; padding: 0 0 8px; }
  .side-title { display: none; }
  .side-nav { flex-direction: row; flex-wrap: nowrap; overflow-x: auto; gap: 6px; max-height: none; padding-bottom: 4px; -webkit-overflow-scrolling: touch; }
  .side-link { white-space: nowrap; flex: 0 0 auto; border: 1px solid var(--border); background: #fff; }
  .side-count { display: none; }
}
@media (max-width: 640px) {
  body { font-size: 14px; }
  .hero { padding: 20px 0 24px; }
  .hero h1 { font-size: 19px; }
  .search-box input { font-size: 16px; }
  .res-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .cat-grid { grid-template-columns: repeat(2, 1fr); }
  .stats-bar { grid-template-columns: repeat(2, 1fr); }
  .nav { display: none; }
  .nav-toggle {
    display: block; margin-left: auto; background: none; border: 1px solid var(--border);
    border-radius: 6px; padding: 5px 10px; font-size: 13px; color: var(--text-sub);
  }
  .nav.open {
    display: flex; position: absolute; top: 56px; left: 0; right: 0; background: #fff;
    border-bottom: 1px solid var(--border); padding: 10px 12px; flex-wrap: wrap; gap: 12px;
  }
  .detail-title { font-size: 18px; }
  .pan-btn { flex-direction: column; align-items: flex-start; }
  .pan-btn .pan-go { width: 100%; text-align: center; }
  .header-inner { position: relative; }
}

/* ---------- 后台 ---------- */
.admin-wrap { display: grid; grid-template-columns: 200px 1fr; gap: 16px; min-height: 70vh; }
.admin-side { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 12px; height: fit-content; }
.admin-side a {
  display: block; padding: 8px 10px; border-radius: 6px; font-size: 14px; color: var(--text-sub);
}
.admin-side a:hover, .admin-side a.active { background: #eff6ff; color: var(--primary); }
.admin-side .side-group { font-size: 12px; color: #9ca3af; padding: 10px 10px 4px; }
.admin-main { background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; }
.admin-title { font-size: 18px; margin: 0 0 14px; display: flex; align-items: center; justify-content: space-between; gap: 10px; flex-wrap: wrap; }

table.data { width: 100%; border-collapse: collapse; font-size: 13px; }
table.data th, table.data td { padding: 8px 8px; border-bottom: 1px solid var(--border); text-align: left; vertical-align: middle; }
table.data th { background: #f9fafb; font-weight: 600; color: var(--text-sub); white-space: nowrap; }
table.data tr:hover td { background: #fafbff; }
.table-scroll { overflow-x: auto; }

.btn {
  display: inline-block; padding: 6px 14px; border-radius: 6px; font-size: 13px;
  background: var(--primary); color: #fff; border: 1px solid var(--primary); cursor: pointer;
}
.btn:hover { background: var(--primary-dark); color: #fff; }
.btn-sm { padding: 3px 9px; font-size: 12px; }
.btn-gray { background: #fff; color: var(--text-sub); border-color: var(--border); }
.btn-gray:hover { background: #f3f4f6; color: var(--text); }
.btn-danger { background: #fff; color: var(--danger); border-color: #fecaca; }
.btn-danger:hover { background: #fee2e2; color: var(--danger); }
.btn-ok { background: #fff; color: var(--success); border-color: #bbf7d0; }

.form-row { margin-bottom: 12px; }
.form-row label { display: block; font-size: 13px; color: var(--text-sub); margin-bottom: 4px; }
.form-row input[type=text], .form-row input[type=password], .form-row input[type=number],
.form-row select, .form-row textarea {
  width: 100%; padding: 8px 10px; border: 1px solid var(--border); border-radius: 6px;
  font-size: 14px; font-family: inherit; background: #fff; color: var(--text);
}
.form-row textarea { min-height: 90px; resize: vertical; }
.form-hint { font-size: 12px; color: #9ca3af; margin-top: 3px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 14px; }
.alert { padding: 10px 12px; border-radius: 6px; font-size: 13px; margin-bottom: 12px; }
.alert-ok { background: #f0fdf4; color: #15803d; border: 1px solid #bbf7d0; }
.alert-err { background: #fef2f2; color: #b91c1c; border: 1px solid #fecaca; }
.alert-warn { background: #fffbeb; color: #92400e; border: 1px solid #fde68a; }

.stat-cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; margin-bottom: 18px; }
.stat-card { background: #f9fafb; border: 1px solid var(--border); border-radius: var(--radius); padding: 14px; }
.stat-card .num { font-size: 22px; font-weight: 700; color: var(--primary); }
.stat-card .label { font-size: 13px; color: var(--text-sub); }

.login-box { max-width: 380px; margin: 60px auto; background: #fff; border: 1px solid var(--border); border-radius: var(--radius); padding: 26px; }
.login-box h1 { font-size: 19px; margin: 0 0 16px; text-align: center; }

.badge { font-size: 11px; padding: 1px 7px; border-radius: 4px; background: #f3f4f6; color: var(--text-sub); }
.badge-on { background: #dcfce7; color: #15803d; }
.badge-off { background: #fee2e2; color: #b91c1c; }

@media (max-width: 900px) {
  .admin-wrap { grid-template-columns: 1fr; }
  .admin-side { display: flex; overflow-x: auto; gap: 6px; }
  .admin-side a { white-space: nowrap; }
  .admin-side .side-group { display: none; }
  .form-grid { grid-template-columns: 1fr; }
  .stat-cards { grid-template-columns: repeat(2, 1fr); }
}