/* 知办库 V3 样式：现代浅色主题，移动优先，SEO 友好
   类名与旧版完全兼容（模板零改动），视觉全面升级 */
:root {
  --primary: #534ab7;
  --primary-dark: #3c3489;
  --primary-light: #7c6fd8;
  --accent: #2563eb;
  --bg: #f6f5fb;
  --card: #ffffff;
  --border: #e6e4f0;
  --text: #26262c;
  --text-2: #5c5c68;
  --text-3: #8b8b96;
  --radius: 14px;
  --shadow: 0 2px 10px rgba(70, 60, 160, .06);
  --shadow-lg: 0 8px 28px rgba(70, 60, 160, .12);
  --grad: linear-gradient(135deg, #534ab7, #7c3aed 60%, #2563eb);
}
* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif; background: var(--bg); color: var(--text); line-height: 1.7; font-size: 15px; }
a { color: var(--accent); text-decoration: none; transition: color .15s; }
a:hover { color: var(--primary-dark); }
.container { max-width: 1120px; margin: 0 auto; padding: 0 16px; }

/* Header */
.site-header { background: rgba(255,255,255,.92); backdrop-filter: blur(10px); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 100; }
.header-inner { display: flex; align-items: center; gap: 20px; flex-wrap: wrap; padding: 12px 16px; }
.logo { font-size: 20px; font-weight: 800; color: var(--primary-dark); display: flex; align-items: center; gap: 8px; letter-spacing: .5px; }
.logo-mark { display: inline-flex; align-items: center; justify-content: center; width: 30px; height: 30px; border-radius: 9px; background: var(--grad); color: #fff; font-size: 15px; box-shadow: 0 2px 6px rgba(83,74,183,.35); }
.main-nav { display: flex; gap: 4px; flex-wrap: wrap; }
.main-nav a { padding: 6px 12px; border-radius: 8px; color: var(--text-2); font-size: 14px; font-weight: 500; }
.main-nav a:hover { background: #f0edff; color: var(--primary-dark); }
.main-nav a.active { background: linear-gradient(135deg, #534ab7, #6d5fd4); color: #fff; box-shadow: 0 2px 8px rgba(83,74,183,.3); }
.search-form { margin-left: auto; display: flex; gap: 0; }
.search-form input { width: 220px; padding: 8px 12px; border: 1px solid var(--border); border-radius: 8px 0 0 8px; font-size: 14px; outline: none; background: #fafaff; }
.search-form input:focus { border-color: var(--primary-light); background: #fff; }
.search-form button { padding: 8px 16px; border: none; background: var(--grad); color: #fff; border-radius: 0 8px 8px 0; font-size: 14px; cursor: pointer; font-weight: 600; }
.search-form button:hover { filter: brightness(1.1); }
.search-form-lg input { width: 420px; max-width: 100%; }

/* Hero */
.hero { background: var(--grad); border-radius: 20px; padding: 52px 32px; margin: 20px 0; text-align: center; color: #fff; box-shadow: 0 12px 40px rgba(83,74,183,.3); position: relative; overflow: hidden; }
.hero::before { content: ""; position: absolute; inset: 0; background: radial-gradient(ellipse at 20% 0%, rgba(255,255,255,.14), transparent 50%), radial-gradient(ellipse at 80% 100%, rgba(255,255,255,.1), transparent 50%); pointer-events: none; }
.hero h1 { font-size: 32px; font-weight: 800; margin-bottom: 12px; letter-spacing: .5px; position: relative; }
.hero-desc { color: rgba(255,255,255,.92); max-width: 640px; margin: 0 auto 22px; font-size: 16px; position: relative; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin: 20px 0 8px; justify-content: center; position: relative; }
.hero-btn { display: inline-block; padding: 11px 26px; background: rgba(255,255,255,.16); color: #fff; border: 1px solid rgba(255,255,255,.35); border-radius: 999px; font-weight: 600; text-decoration: none; backdrop-filter: blur(4px); transition: all .2s; }
.hero-btn:hover { background: #fff; color: var(--primary-dark); transform: translateY(-2px); box-shadow: 0 6px 20px rgba(0,0,0,.15); }
.hero-search { display: flex; justify-content: center; position: relative; }
.hero-search input { width: 440px; max-width: 100%; padding: 13px 18px; border: none; border-radius: 999px 0 0 999px; font-size: 15px; outline: none; box-shadow: 0 4px 16px rgba(0,0,0,.12); }
.hero-search input:focus { box-shadow: 0 4px 20px rgba(0,0,0,.2); }
.hero-search button { padding: 13px 26px; border: none; background: #26262c; color: #fff; border-radius: 0 999px 999px 0; font-size: 15px; cursor: pointer; font-weight: 600; box-shadow: 0 4px 16px rgba(0,0,0,.12); }
.hero-search button:hover { background: #000; }

/* Sections */
.section { margin: 30px 0; }
.section-title { font-size: 20px; font-weight: 800; color: var(--text); margin-bottom: 16px; padding-left: 12px; border-left: 4px solid var(--primary); background: linear-gradient(90deg, #534ab7, #2563eb); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.cat-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(190px, 1fr)); gap: 14px; }
.cat-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px 18px; transition: all .2s; }
.cat-card:hover { border-color: var(--primary-light); box-shadow: var(--shadow-lg); transform: translateY(-3px); }
.cat-name { font-size: 16px; font-weight: 700; color: var(--primary-dark); margin-bottom: 6px; }
.cat-desc { font-size: 13px; color: var(--text-2); min-height: 38px; line-height: 1.6; }
.cat-count { font-size: 12px; color: var(--text-3); margin-top: 10px; display: inline-block; background: #f0edff; color: var(--primary); padding: 2px 10px; border-radius: 999px; }

/* Online tools section */
.tool-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 14px; }
.tool-card-link { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; display: block; transition: all .2s; }
.tool-card-link:hover { border-color: var(--accent); box-shadow: var(--shadow-lg); transform: translateY(-3px); }
.tool-icon { font-size: 30px; margin-bottom: 10px; display: inline-block; background: #f0edff; width: 52px; height: 52px; line-height: 52px; text-align: center; border-radius: 14px; }
.tool-name { font-size: 16px; font-weight: 700; color: var(--primary-dark); margin-bottom: 6px; }
.tool-desc { font-size: 13px; color: var(--text-2); line-height: 1.5; }
.tool-cta { font-size: 13px; color: var(--accent); margin-top: 12px; font-weight: 700; display: inline-block; }
.tool-card-link:hover .tool-cta { color: var(--primary-dark); }

/* Resource list / cards */
.res-list { display: flex; flex-direction: column; gap: 10px; }
.res-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px 18px; display: block; transition: all .18s; }
.res-card:hover { border-color: var(--primary-light); box-shadow: var(--shadow); transform: translateX(3px); }
.res-title { font-size: 16px; font-weight: 600; color: var(--accent); margin-bottom: 4px; }
.res-card:hover .res-title { color: var(--primary-dark); }
.res-summary { font-size: 14px; color: var(--text-2); line-height: 1.6; }
.res-tags { margin: 8px 0 2px; display: flex; gap: 6px; flex-wrap: wrap; }
.res-meta { margin-top: 8px; font-size: 12px; color: var(--text-3); display: flex; gap: 10px; align-items: center; }
.badge-type { background: #e6f1fb; color: #0c447c; border-radius: 6px; padding: 1px 8px; font-size: 12px; font-weight: 500; }
.tag { display: inline-block; background: #f2f0fb; color: var(--text-2); border-radius: 6px; padding: 1px 8px; font-size: 12px; }
a.tag:hover { background: #eeedfe; color: var(--primary-dark); }
mark { background: #ffe9a8; padding: 0 2px; border-radius: 3px; }

.res-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); gap: 14px; }
.res-tile { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 18px; display: block; transition: all .2s; }
.res-tile:hover { border-color: var(--primary-light); box-shadow: var(--shadow-lg); transform: translateY(-3px); }
.tile-title { font-weight: 700; color: var(--accent); margin-bottom: 4px; font-size: 15px; }
.tile-summary { font-size: 13px; color: var(--text-2); line-height: 1.6; }
.tile-type { margin-top: 10px; font-size: 12px; color: var(--text-3); }

/* Category page */
.crumbs { font-size: 13px; color: var(--text-3); margin: 18px 0 8px; display: flex; gap: 8px; flex-wrap: wrap; }
.crumbs a { color: var(--text-2); }
.crumbs a:hover { color: var(--primary); }
.page-title { font-size: 26px; font-weight: 800; color: var(--text); margin: 4px 0 6px; }
.page-desc { color: var(--text-2); margin-bottom: 16px; }
.sub-nav { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 16px; }
.sub-nav a { background: var(--card); border: 1px solid var(--border); border-radius: 999px; padding: 6px 14px; font-size: 13px; color: var(--text-2); transition: all .15s; }
.sub-nav a:hover { border-color: var(--primary-light); color: var(--primary-dark); box-shadow: var(--shadow); }
.sub-nav .count { color: var(--text-3); margin-left: 6px; font-size: 12px; }
.empty { color: var(--text-3); background: var(--card); border: 1px dashed var(--border); border-radius: var(--radius); padding: 28px; text-align: center; }

/* Detail */
.detail { background: var(--card); border: 1px solid var(--border); border-radius: 18px; padding: 30px 34px; margin: 16px 0; box-shadow: var(--shadow); }
.detail-title { font-size: 26px; font-weight: 800; color: var(--text); margin-bottom: 8px; }
.detail-summary { color: var(--text-2); margin-bottom: 16px; }
.action-bar { display: flex; gap: 10px; margin: 16px 0 20px; flex-wrap: wrap; }
.btn { display: inline-block; padding: 10px 22px; border-radius: 10px; font-size: 15px; font-weight: 600; }
.btn-primary { background: var(--grad); color: #fff; box-shadow: 0 4px 12px rgba(83,74,183,.3); }
.btn-primary:hover { filter: brightness(1.1); color: #fff; transform: translateY(-1px); }
.btn-ghost { background: #fff; border: 1px solid var(--primary); color: var(--primary); }
.btn-ghost:hover { background: #f0edff; }
.detail-body { font-size: 15px; }
.detail-body h2, .detail-body h3 { margin: 18px 0 8px; color: var(--text); font-weight: 700; }
.detail-body p { margin: 10px 0; }
.detail-body ul, .detail-body ol { margin: 10px 0; padding-left: 24px; }
.detail-body table { border-collapse: collapse; width: 100%; margin: 14px 0; font-size: 14px; }
.detail-body th, .detail-body td { border: 1px solid var(--border); padding: 8px 10px; text-align: left; }
.detail-body th { background: #f0edff; font-weight: 600; }
.detail-tags { margin: 20px 0 4px; display: flex; gap: 8px; flex-wrap: wrap; }
.faq { margin-top: 26px; border-top: 1px solid var(--border); padding-top: 18px; }
.faq h2 { font-size: 17px; font-weight: 700; color: var(--text); margin-bottom: 12px; }
.faq-item { border: 1px solid var(--border); border-radius: 10px; margin-bottom: 8px; padding: 10px 14px; background: #fafaff; }
.faq-item summary { cursor: pointer; font-weight: 600; color: var(--primary-dark); }
.faq-item p { margin-top: 8px; font-size: 14px; color: var(--text-2); }

/* Search / 404 / page */
.search-panel { background: var(--card); border: 1px solid var(--border); border-radius: 16px; padding: 26px 28px; margin: 16px 0; box-shadow: var(--shadow); }
.result-count { color: var(--text-3); font-size: 13px; margin-top: 10px; }
.page-body { background: var(--card); border: 1px solid var(--border); border-radius: 16px; padding: 24px 28px; margin: 12px 0; box-shadow: var(--shadow); }
.nf { text-align: center; padding: 60px 20px; }
.nf-code { font-size: 72px; color: var(--border); font-weight: 800; background: var(--grad); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.nf-nav { display: flex; gap: 10px; justify-content: center; flex-wrap: wrap; margin-top: 20px; }

/* Pagination */
.pagination { display: flex; gap: 6px; justify-content: center; margin: 24px 0; flex-wrap: wrap; }
.pagination a, .pagination .current, .pagination .dots { padding: 6px 12px; border-radius: 8px; font-size: 14px; }
.pagination a { background: var(--card); border: 1px solid var(--border); color: var(--text-2); }
.pagination a:hover { border-color: var(--primary-light); color: var(--primary-dark); }
.pagination .current { background: var(--grad); color: #fff; font-weight: 700; }
.pagination .dots { color: var(--text-3); }

/* Footer */
.site-footer { background: #1e1e26; border-top: none; margin-top: 40px; padding: 28px 0; color: #b8b8c2; }
.footer-inner { text-align: center; }
.footer-links { display: flex; gap: 18px; justify-content: center; flex-wrap: wrap; margin-bottom: 8px; }
.footer-links a { color: #b8b8c2; font-size: 14px; }
.footer-links a:hover { color: #fff; }
.site-footer p { color: #8a8a96; font-size: 12px; }
.site-footer .footer-icp a { color: #8a8a96; }

@media (max-width: 640px) {
  .search-form input { width: 150px; }
  .hero { padding: 36px 18px; }
  .hero h1 { font-size: 24px; }
  .detail { padding: 20px 18px; }
  .header-inner { gap: 10px; }
  .main-nav a { padding: 4px 8px; font-size: 13px; }
}
/* V2 补充样式 */
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.meta-line { display: flex; gap: 8px; flex-wrap: wrap; margin: 10px 0; align-items: center; }
.kw-line { font-size: 12px; color: var(--text-3); display: inline-flex; gap: 6px; align-items: center; }
@media (max-width: 700px) { .two-col { grid-template-columns: 1fr; } }

/* 下载区域 */
.download-section { margin: 24px 0; padding: 18px 20px; background: linear-gradient(135deg, #f8f7ff, #f0edff); border: 1px solid var(--border); border-radius: var(--radius); }
.download-section h2 { font-size: 18px; margin-bottom: 12px; font-weight: 700; }
.dl-group { margin-bottom: 14px; }
.dl-group-title { font-size: 13px; color: var(--text-3); margin-bottom: 8px; font-weight: 600; }
.dl-buttons { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; }
.btn-pan { background: #3b82f6; color: #fff; box-shadow: 0 3px 10px rgba(59,130,246,.25); }
.btn-pan:hover { background: #2563eb; color: #fff; }
.btn-lanzou { background: #16a34a; color: #fff; box-shadow: 0 3px 10px rgba(22,163,74,.25); }
.btn-lanzou:hover { background: #15803d; color: #fff; }
.btn-baidu { background: #2563eb; color: #fff; box-shadow: 0 3px 10px rgba(37,99,235,.25); }
.btn-baidu:hover { background: #1d4ed8; color: #fff; }
.dl-item { display: inline-flex; gap: 10px; align-items: center; }
.extract-code { font-size: 13px; color: var(--text-2); }
.code-btn { border: 1px solid var(--border); background: #fff; border-radius: 6px; padding: 2px 10px; cursor: pointer; font-size: 12px; }
.code-value { color: #c0392b; font-weight: 700; }
.hint-dl { font-size: 12px; color: var(--text-3); margin-top: 10px; }

/* V2.5 热门徽章 */
.badge-hot { background: #fdeeee; color: #c0392b; border-radius: 6px; padding: 1px 8px; font-size: 12px; }
.badge-dl { background: #eef4fd; color: var(--accent); border-radius: 6px; padding: 1px 8px; font-size: 12px; }

/* CDN 兼容封面图 */
.detail-cover { margin: 14px 0; }
.detail-cover img { max-width: 100%; border-radius: 10px; border: 1px solid var(--border); }

/* Download Intelligence */
.file-hash { font-size: 12px; color: var(--text-3); margin-top: 4px; }
.file-hash code { background: #f2f0fa; padding: 1px 6px; border-radius: 4px; font-size: 11px; }

/* 决策价值卡片 */
.decision-card { background: linear-gradient(135deg, #faf9ff, #f3f1ff); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; margin: 16px 0; }
.decision-card h2 { margin: 0 0 10px; font-size: 18px; font-weight: 700; }
.decision-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 10px 16px; }
.decision-grid b { color: var(--text); font-size: 14px; }
.decision-grid p { margin: 2px 0 0; font-size: 13px; color: var(--text-2); line-height: 1.5; }
.decision-advice { margin-top: 12px; border-top: 1px dashed var(--border); padding-top: 10px; display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.decision-advice b { color: var(--primary); font-size: 14px; }
.decision-advice p { margin: 2px 0 0; font-size: 13px; color: var(--text-2); }
@media (max-width: 640px) {
  .decision-grid, .decision-advice { grid-template-columns: 1fr; }
}

/* 12 模块资源页结构 */
.info-card { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0; }
.info-card .tag { background: #f2f0fa; color: var(--text-2); }
.sec { margin: 20px 0; }
.sec h2 { font-size: 20px; margin-bottom: 10px; border-left: 4px solid var(--primary); padding-left: 10px; font-weight: 700; }
.sec-text { color: var(--text-2); line-height: 1.7; }
.update-log p { margin: 4px 0; color: var(--text-2); }
.update-notice { color: #a32d2d; font-weight: 600; }
.dl-tier { margin: 12px 0; }
.dl-tier-title { font-weight: 700; color: var(--text); margin-bottom: 8px; font-size: 15px; }
.dl-tier-title::before { content: "▸ "; color: var(--primary); }