/*
Theme Name: 协筑文档下载
Theme URI: https://www.mfbzk.com
Description: 建筑标准/规范文档分享下载专用主题。现代扁平化设计：粘性导航、搜索中心首页、扁平文档卡片、醒目网盘下载卡片（提取码一键复制）。配合"协筑资源采集工具"使用。
Author: MFBZK
Author URI: https://www.mfbzk.com
Version: 2.0.0
Text Domain: xiezhu-doc
*/

/* ========== 设计变量（扁平化） ========== */
:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-soft: #eff6ff;
  --green: #16a34a;
  --bg: #eff6ff;
  --card: #ffffff;
  --text: #111827;
  --muted: #6b7280;
  --border: #e5e7eb;
  --radius: 10px;
  --radius-sm: 8px;
  --shadow: 0 1px 2px rgba(17, 24, 39, .04);
  --shadow-hover: 0 10px 28px rgba(17, 24, 39, .08);
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
  background: var(--bg); color: var(--text); line-height: 1.7; font-size: 15px;
}
a { color: var(--primary); text-decoration: none; transition: color .15s; }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; height: auto; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 16px; }

.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; border: 0; }
.skip-link { position: absolute; left: -9999px; top: 0; background: var(--primary); color: #fff; padding: 8px 16px; z-index: 999; border-radius: 0 0 8px 0; }
.skip-link:focus { left: 0; color: #fff; }

/* ========== 头部（粘性导航：Logo + 菜单 + 搜索 同排） ========== */
.site-header { position: sticky; top: 0; z-index: 100; background: #fff; border-bottom: 1px solid var(--border); }
.header-bar { display: flex; align-items: center; gap: 14px; height: 60px; }
.site-branding { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo-mark { display: inline-flex; align-items: center; justify-content: center; width: 36px; height: 36px; background: var(--primary); border-radius: 9px; color: #fff; flex-shrink: 0; }
.logo-mark svg { display: block; }
.site-title { font-size: 20px; font-weight: 700; letter-spacing: .5px; white-space: nowrap; }
.site-title a { color: var(--text); }
.site-title a:hover { color: var(--primary); }
.main-nav { flex: 1; min-width: 0; }
.main-nav ul { list-style: none; display: flex; overflow-x: auto; -webkit-overflow-scrolling: touch; scrollbar-width: none; }
.main-nav ul::-webkit-scrollbar { display: none; }
.main-nav a { display: block; padding: 7px 12px; color: var(--muted); font-size: 14px; white-space: nowrap; border-radius: 6px; }
.main-nav a:hover { color: var(--primary); background: var(--primary-soft); }
.main-nav .current-menu-item > a,
.main-nav .current_page_item > a { color: var(--primary); background: var(--primary-soft); font-weight: 600; }
.header-search { flex-shrink: 0; width: 280px; }
.header-search form { display: flex; background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius-sm); overflow: hidden; transition: border-color .15s, box-shadow .15s, background .15s; }
.header-search form:focus-within { border-color: var(--primary); background: #fff; box-shadow: 0 0 0 3px var(--primary-soft); }
.header-search input[type="search"] { flex: 1; min-width: 0; border: none; background: transparent; padding: 8px 12px; font-size: 14px; outline: none; color: var(--text); }
.header-search button { border: none; background: var(--primary); color: #fff; padding: 0 16px; font-size: 14px; cursor: pointer; }
.header-search button:hover { background: var(--primary-dark); }

/* ========== 首页 Hero（扁平） ========== */
.hero { background: var(--primary-soft); border-bottom: 1px solid var(--border); padding: 52px 0 40px; text-align: center; }
.hero h1 { font-size: 30px; font-weight: 700; letter-spacing: 1px; }
.hero .hero-desc { color: var(--muted); font-size: 15px; margin: 8px 0 24px; }
.hero-search { max-width: 620px; margin: 0 auto; }
.hero-search form { display: flex; background: #fff; border: 2px solid var(--primary); border-radius: var(--radius-sm); overflow: hidden; box-shadow: 0 2px 10px rgba(37, 99, 235, .12); }
.hero-search input { flex: 1; min-width: 0; border: none; outline: none; padding: 13px 18px; font-size: 16px; color: var(--text); background: transparent; }
.hero-search button { border: none; background: var(--primary); color: #fff; padding: 0 34px; font-size: 16px; font-weight: 600; cursor: pointer; white-space: nowrap; }
.hero-search button:hover { background: var(--primary-dark); }
.hero-feats { display: flex; justify-content: center; gap: 28px; margin-top: 26px; flex-wrap: wrap; }
.hero-feats span { font-size: 13px; color: var(--muted); display: inline-flex; align-items: center; gap: 7px; }
.hero-feats i { width: 8px; height: 8px; border-radius: 50%; background: var(--green); display: inline-block; }

/* ========== 区块标题 ========== */
.section { padding: 28px 0 8px; }
.section-head { display: flex; align-items: baseline; justify-content: space-between; margin-bottom: 16px; }
.section-head h2 { font-size: 20px; font-weight: 700; padding-left: 12px; border-left: 4px solid var(--primary); line-height: 1.3; }
.section-head .more { font-size: 13px; color: var(--muted); flex-shrink: 0; }
.section-head .more:hover { color: var(--primary); }

/* ========== 文档卡片 ========== */
.doc-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; padding-bottom: 8px; }
.doc-grid-4 { grid-template-columns: repeat(4, 1fr); gap: 14px; }
.doc-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; display: flex; flex-direction: column; transition: border-color .15s, box-shadow .15s, transform .15s; }
.doc-card:hover { border-color: #c7dbff; box-shadow: var(--shadow-hover); transform: translateY(-2px); }
.doc-card .doc-thumb { display: block; margin: -16px -16px 12px; overflow: hidden; border-radius: var(--radius) var(--radius) 0 0; border-bottom: 1px solid var(--border); }
.doc-card .doc-thumb img { width: 100%; display: block; aspect-ratio: 16 / 10; object-fit: cover; }
.doc-card .doc-badges { margin-bottom: 8px; display: flex; flex-wrap: wrap; gap: 6px; }
.badge-code { background: var(--primary-soft); color: var(--primary); font-size: 12px; font-weight: 600; padding: 2px 9px; border-radius: 5px; }
.badge-cat { background: #ecfdf5; color: #059669; font-size: 12px; padding: 2px 9px; border-radius: 5px; }
.doc-card h2, .doc-card h3 { font-size: 15.5px; line-height: 1.55; margin-bottom: 8px; font-weight: 600; }
.doc-card h2 a, .doc-card h3 a { color: var(--text); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.doc-card h2 a:hover, .doc-card h3 a:hover { color: var(--primary); }
.doc-card .doc-excerpt { font-size: 13px; color: var(--muted); flex: 1; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.doc-card .doc-meta { margin-top: 14px; padding-top: 12px; border-top: 1px solid var(--border); font-size: 12.5px; color: var(--muted); display: flex; justify-content: space-between; align-items: center; gap: 8px; }
.doc-card .doc-meta .dl-go { color: var(--primary); font-weight: 600; flex-shrink: 0; }

/* ========== 列表页头 ========== */
.page-header { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px 20px; margin: 20px 0 16px; }
.page-header h1 { font-size: 19px; line-height: 1.5; }
.page-header small { color: var(--muted); font-size: 13px; font-weight: 400; }
.page-header .empty-tip { color: var(--muted); margin-top: 8px; font-size: 14px; }

/* ========== 分页 ========== */
.pagination { margin: 26px 0 8px; text-align: center; }
.pagination .page-numbers { display: inline-block; padding: 8px 14px; margin: 0 3px; background: var(--card); border: 1px solid var(--border); border-radius: var(--radius-sm); color: var(--text); font-size: 14px; }
.pagination .page-numbers:hover { border-color: var(--primary); color: var(--primary); }
.pagination .current { background: var(--primary); border-color: var(--primary); color: #fff; }

/* ========== 布局 ========== */
.site-main { display: flex; gap: 24px; margin: 20px auto 32px; align-items: flex-start; }
.site-main-full { display: block; }
.site-main-full .content-area { width: 100%; }
.content-area { flex: 1; min-width: 0; }
.widget-area { width: 300px; flex-shrink: 0; }
.widget { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px 18px; margin-bottom: 16px; }
.widget-title { font-size: 15px; font-weight: 700; margin-bottom: 10px; padding-left: 10px; border-left: 3px solid var(--primary); line-height: 1.4; }
.widget ul { list-style: none; }
.widget ul li { padding: 7px 0; border-bottom: 1px dashed var(--border); font-size: 14px; }
.widget ul li:last-child { border-bottom: none; }

/* ========== 详情页 ========== */
.breadcrumb { font-size: 13px; color: var(--muted); margin: 16px 0 12px; }
.breadcrumb a { color: var(--muted); }
.breadcrumb a:hover { color: var(--primary); }
.single-doc { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px 32px; }
.single-doc h1.entry-title { font-size: 24px; line-height: 1.5; margin-bottom: 12px; }
.entry-meta { font-size: 13px; color: var(--muted); padding-bottom: 16px; border-bottom: 1px solid var(--border); margin-bottom: 22px; display: flex; flex-wrap: wrap; gap: 16px; }
.entry-content { font-size: 15px; word-break: break-word; }
.entry-content p { margin-bottom: 1em; }
.entry-content h2, .entry-content h3 { margin: 1.4em 0 .7em; }
.entry-content blockquote { border-left: 4px solid var(--primary); background: var(--primary-soft); padding: 12px 18px; margin: 1em 0; border-radius: 0 8px 8px 0; }
.entry-content ul, .entry-content ol { margin: 1em 0 1em 2em; }
.entry-content table { width: 100%; border-collapse: collapse; margin: 1em 0; }
.entry-content th, .entry-content td { border: 1px solid var(--border); padding: 8px 12px; font-size: 14px; }
.entry-content th { background: var(--bg); }

/* 资源信息块（采集工具生成） */
.resource-info { background: var(--bg); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px 20px; margin: 22px 0; }
.resource-info h3 { margin: 0 0 10px; font-size: 15px; padding-left: 10px; border-left: 3px solid var(--primary); line-height: 1.4; }
.resource-info ul { list-style: none; margin: 0; }
.resource-info li { padding: 6px 0; font-size: 14px; border-bottom: 1px dashed var(--border); }
.resource-info li:last-child { border-bottom: none; }

/* 下载卡片（采集工具生成 .download-links，经主题 filter 增强） */
.download-links { margin: 28px 0; background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px 22px; }
.download-links h3 { font-size: 17px; margin-bottom: 14px; padding-left: 10px; border-left: 4px solid var(--green); line-height: 1.4; }
.download-links ul { list-style: none; margin: 0; }
.dl-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px 18px; display: flex; align-items: center; gap: 14px; flex-wrap: wrap; margin-bottom: 10px; transition: border-color .15s, box-shadow .15s; }
.dl-card:last-child { margin-bottom: 0; }
.dl-card:hover { border-color: var(--primary); box-shadow: var(--shadow-hover); }
.dl-card .dl-icon { display: inline-flex; align-items: center; justify-content: center; width: 44px; height: 44px; background: var(--primary-soft); color: var(--primary); border-radius: 10px; flex-shrink: 0; }
.dl-card .dl-icon svg { display: block; }
.dl-card .dl-info { flex: 1; min-width: 180px; }
.dl-card .dl-name { font-weight: 600; font-size: 14.5px; word-break: break-all; line-height: 1.5; }
.dl-card .dl-pwd { font-size: 13px; color: var(--muted); margin-top: 4px; }
.dl-card .dl-pwd code { background: #fff7ed; color: #c2410c; padding: 2px 10px; border-radius: 5px; font-size: 14px; font-weight: 700; cursor: pointer; border: 1px dashed #fdba74; }
.dl-card .dl-btn { display: inline-flex; align-items: center; gap: 6px; background: var(--primary); color: #fff !important; padding: 10px 26px; border-radius: var(--radius-sm); font-size: 15px; font-weight: 600; transition: background .15s; }
.dl-card .dl-btn:hover { background: var(--primary-dark); color: #fff; }
.dl-card .dl-btn svg { flex-shrink: 0; }

/* 标签 / 上下篇 */
.entry-tags { margin-top: 24px; padding-top: 16px; border-top: 1px solid var(--border); font-size: 13px; }
.entry-tags a { display: inline-block; background: var(--bg); border: 1px solid var(--border); border-radius: 6px; padding: 2px 12px; margin: 3px 6px 3px 0; font-size: 13px; color: var(--muted); }
.entry-tags a:hover { color: var(--primary); border-color: var(--primary); background: var(--primary-soft); }
.post-nav { display: flex; justify-content: space-between; gap: 16px; margin-top: 20px; font-size: 14px; }
.post-nav a { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 12px 18px; flex: 1; min-width: 0; }
.post-nav a:hover { color: var(--primary); border-color: var(--primary); }

/* ========== 404 ========== */
.error-404 { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); text-align: center; padding: 70px 24px; margin: 24px 0; }
.error-404 .code { font-size: 72px; font-weight: 800; color: var(--primary); line-height: 1.1; }
.error-404 p { color: var(--muted); margin: 14px 0 22px; }
.error-404 .btn-home { display: inline-block; background: var(--primary); color: #fff; padding: 10px 30px; border-radius: var(--radius-sm); font-weight: 600; }
.error-404 .btn-home:hover { background: var(--primary-dark); color: #fff; }
.error-404 .hero-search { max-width: 420px; margin-top: 24px; }

/* ========== 页脚（仅版权） ========== */
.site-footer { background: #0f172a; color: #94a3b8; margin-top: 48px; font-size: 13px; text-align: center; padding: 18px 0 20px; }
.site-footer p { margin: 2px 0; line-height: 1.8; }

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
  .doc-grid { grid-template-columns: repeat(2, 1fr); }
  .widget-area { width: 260px; }
}
@media (max-width: 768px) {
  .header-bar { height: auto; flex-wrap: wrap; padding: 10px 0; row-gap: 8px; }
  .main-nav { order: 3; flex-basis: 100%; }
  .header-search { order: 2; flex: 1; width: auto; min-width: 0; }
  .doc-grid-4 { grid-template-columns: repeat(2, 1fr); }
  .site-main { flex-direction: column; }
  .widget-area { width: 100%; }
  .single-doc { padding: 20px 16px; }
  .single-doc h1.entry-title { font-size: 20px; }
}
@media (max-width: 640px) {
  .doc-grid { grid-template-columns: 1fr; }
  .hero { padding: 34px 0 28px; }
  .hero h1 { font-size: 22px; }
  .hero-search button { padding: 0 20px; }
  .hero-feats { gap: 14px; }
  .error-404 { padding: 48px 16px; }
}