/* ============================================================
   轻导航 LiteNav - 前台样式
   ============================================================ */
* { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --primary: #2563eb;
  --primary-dark: #1d4ed8;
  --primary-light: #eff6ff;
  --text: #1e293b;
  --text-2: #64748b;
  --text-3: #94a3b8;
  --border: #e2e8f0;
  --bg: #f5f7fa;
  --card-bg: #ffffff;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(15, 23, 42, .06), 0 4px 14px rgba(15, 23, 42, .04);
}

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: 1.6; }

a { color: var(--primary); text-decoration: none; }
a:hover { color: var(--primary-dark); }

.container { max-width: 1200px; margin: 0 auto; padding: 0 16px; }

/* ---------- 顶部 ---------- */
.site-header { background: #fff; border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 100; }
.header-inner { display: flex; align-items: center; gap: 24px; padding-top: 14px; padding-bottom: 14px; flex-wrap: wrap; }

.logo { display: flex; align-items: center; gap: 10px; }
.logo-mark { font-size: 30px; line-height: 1; }
.logo-text { display: flex; flex-direction: column; line-height: 1.25; }
.logo-text strong, .logo-text .logo-h1 strong { font-size: 20px; color: var(--text); }
.logo-text .logo-h1 { margin: 0; font-size: 0; line-height: 1.25; }
.logo-text em { font-style: normal; font-size: 12px; color: var(--text-3); }

.header-search { flex: 1; display: flex; max-width: 460px; min-width: 200px; }
.header-search input { flex: 1; padding: 9px 14px; border: 1px solid var(--border); border-radius: 8px 0 0 8px; font-size: 14px; outline: none; }
.header-search input:focus { border-color: var(--primary); }
.header-search button { padding: 9px 20px; background: var(--primary); color: #fff; border: 0; border-radius: 0 8px 8px 0; cursor: pointer; font-size: 14px; }
.header-search button:hover { background: var(--primary-dark); }

.btn-submit { padding: 9px 18px; background: var(--primary-light); color: var(--primary); border: 1px solid #bfdbfe; border-radius: 8px; font-size: 14px; font-weight: 500; white-space: nowrap; }
.btn-submit:hover { background: #dbeafe; color: var(--primary-dark); }

.site-nav { background: #fff; border-top: 1px solid var(--border); }
.nav-inner { display: flex; flex-wrap: wrap; gap: 2px; }
.nav-inner a { padding: 10px 14px; font-size: 14px; color: var(--text-2); border-bottom: 2px solid transparent; }
.nav-inner a:hover { color: var(--primary); background: var(--primary-light); }
.nav-inner a.active { color: var(--primary); font-weight: 600; border-bottom-color: var(--primary); }
.c-icon { margin-right: 2px; }

/* ---------- 主体 ---------- */
.site-main { padding-top: 20px; padding-bottom: 32px; min-height: 60vh; }

.alert { padding: 12px 16px; border-radius: var(--radius); margin-bottom: 16px; font-size: 14px; border: 1px solid; }
.alert-success { background: #f0fdf4; border-color: #bbf7d0; color: #15803d; }
.alert-error { background: #fef2f2; border-color: #fecaca; color: #b91c1c; }
.alert-warning { background: #fffbeb; border-color: #fde68a; color: #b45309; }
.alert ul { margin-left: 18px; }

/* ---------- 区块标题 ---------- */
.section { margin-bottom: 28px; }
.section-title { display: flex; align-items: center; gap: 8px; font-size: 18px; margin: 22px 0 14px; color: var(--text); }
.title-tag { font-size: 18px; }
.cat-title-link { color: var(--text); }
.cat-title-link:hover { color: var(--primary); }
.cat-desc { font-size: 13px; color: var(--text-3); font-weight: 400; margin-left: 6px; }
.cat-more { font-size: 13px; color: var(--text-3); margin-left: auto; }
.cat-more:hover { color: var(--primary); }
.count-badge { font-size: 12px; font-weight: 400; color: var(--text-3); background: var(--border); padding: 2px 10px; border-radius: 20px; }

/* ---------- 站点卡片 ---------- */
.site-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(360px, 1fr)); gap: 12px; }

.site-card { background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--radius); padding: 14px; transition: box-shadow .2s, border-color .2s; display: flex; flex-direction: column; gap: 10px; }
.site-card:hover { box-shadow: var(--shadow); border-color: #bfdbfe; }
.site-card-top { border-left: 3px solid var(--primary); }

.site-card-main { display: flex; gap: 12px; align-items: flex-start; min-width: 0; }
.site-logo { flex-shrink: 0; width: 48px; height: 48px; border-radius: 10px; background: var(--primary-light); display: flex; align-items: center; justify-content: center; overflow: hidden; border: 1px solid var(--border); }
.site-logo img { width: 100%; height: 100%; object-fit: contain; }
.site-logo.no-img { font-size: 20px; font-weight: 600; color: var(--primary); }

.site-card-info { min-width: 0; }
.site-card-title { font-size: 15px; font-weight: 600; line-height: 1.4; margin: 0; }
.site-card-title a { color: var(--text); }
.site-card-title a:hover { color: var(--primary); }
.site-card-desc { font-size: 13px; color: var(--text-2); margin-top: 2px; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.site-card-cat { font-size: 12px; color: var(--text-3); margin-top: 2px; }

.site-card-foot { display: flex; align-items: center; justify-content: space-between; border-top: 1px dashed var(--border); padding-top: 8px; }
.site-click { font-size: 12px; color: var(--text-3); }
.btn-go { display: inline-block; padding: 5px 14px; background: var(--primary); color: #fff; border-radius: 7px; font-size: 13px; line-height: 1.6; border: 0; cursor: pointer; }
.btn-go:hover { background: var(--primary-dark); color: #fff; }
.btn-lg { padding: 10px 26px; font-size: 15px; }

/* ---------- 分类区块 ---------- */
.cat-block { margin-bottom: 8px; }
.cat-block-head { display: flex; align-items: center; margin: 22px 0 12px; }
.cat-block-head .section-title { margin: 0; }
.cat-block-head-page { display: block; }
.cat-block-head-page .section-title { margin-bottom: 6px; }

/* 手机端专属元素：桌面端默认隐藏，桌面布局不受任何影响 */
.cat-fold { display: none; }
.m-site-grid { display: none; }

/* ---------- 广告位 ---------- */
.ad-block { margin: 14px 0; text-align: center; }
.ad-block a { text-decoration: none; }
/* 横幅广告：自动拉伸至标准尺寸 1200×120 */
.ad-banner img, .ad-banner a img { width: 100%; max-width: 1200px; height: 120px; object-fit: fill; border-radius: 10px; display: block; margin: 0 auto; }
.ad-banner .ad-banner-content { display: block; padding: 13px 18px; border-radius: 10px; background: linear-gradient(135deg, var(--primary-light), #ffffff); border: 1px solid var(--border); color: var(--primary); font-size: 14px; font-weight: 500; }
/* 小图片广告：自动拉伸至标准尺寸 300×250 */
.ad-img { margin: 14px auto; }
.ad-img img, .ad-img a img { width: 100%; max-width: 300px; height: 250px; object-fit: fill; border-radius: 10px; display: block; margin: 0 auto; }
/* 文字广告：横向排列（页脚多条并排） */
.ad-text-wrap { display: flex; flex-wrap: wrap; justify-content: center; gap: 8px 14px; margin: 14px 0; }
.ad-text-wrap:empty { display: none; }
.ad-text-wrap .ad-block { margin: 0; }
.ad-text .ad-text-content { display: inline-block; padding: 6px 18px; background: var(--primary-light); border: 1px solid var(--border); border-radius: 20px; color: var(--text-2); font-size: 13px; }

/* 手机端汉堡按钮与分类抽屉：桌面端隐藏 */
.nav-hamburger { display: none; }
.drawer, .drawer-mask { display: none; }

/* ---------- 详情页 ---------- */
.breadcrumb { font-size: 13px; color: var(--text-3); margin: 4px 0 16px; }
.breadcrumb a { color: var(--text-3); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { margin: 0 6px; color: #cbd5e1; }

.detail-card { background: #fff; border: 1px solid var(--border); border-radius: 14px; padding: 26px; margin-bottom: 24px; }
.detail-main { display: flex; gap: 18px; align-items: flex-start; }
.detail-main .site-logo { width: 72px; height: 72px; border-radius: 14px; font-size: 30px; }
.detail-title { font-size: 24px; margin: 0 0 4px; }
.detail-url { font-size: 14px; color: var(--text-3); word-break: break-all; }
.detail-desc { font-size: 14px; color: var(--text-2); margin-top: 8px; }
.detail-meta { display: flex; flex-wrap: wrap; gap: 18px; margin-top: 16px; padding-top: 14px; border-top: 1px dashed var(--border); font-size: 13px; color: var(--text-2); }
.badge-rec { background: #fef3c7; color: #b45309; padding: 2px 10px; border-radius: 20px; font-size: 12px; }
.detail-actions { margin-top: 18px; display: flex; gap: 12px; align-items: center; }
.btn-copy { padding: 10px 20px; background: #fff; color: var(--text-2); border: 1px solid var(--border); border-radius: 8px; font-size: 14px; cursor: pointer; }
.btn-copy:hover { border-color: var(--primary); color: var(--primary); }

/* ---------- 分类标签 ---------- */
.cat-tags { display: flex; flex-wrap: wrap; gap: 10px; }
.cat-tag { padding: 8px 16px; background: #fff; border: 1px solid var(--border); border-radius: 24px; font-size: 13px; color: var(--text-2); }
.cat-tag:hover { border-color: var(--primary); color: var(--primary); }

/* ---------- 申请表单 ---------- */
.form-section { background: #fff; border: 1px solid var(--border); border-radius: 14px; padding: 26px; max-width: 720px; }
.form-title { font-size: 22px; margin-bottom: 6px; }
.form-sub { color: var(--text-2); font-size: 14px; margin-bottom: 20px; }
.apply-form .form-row { margin-bottom: 16px; }
.apply-form label { display: block; font-size: 14px; margin-bottom: 6px; color: var(--text); }
.apply-form label b { color: #dc2626; }
.apply-form input[type="text"], .apply-form input[type="url"], .apply-form input[type="email"], .apply-form select, .apply-form textarea {
  width: 100%; padding: 10px 12px; border: 1px solid var(--border); border-radius: 8px; font-size: 14px; font-family: inherit; outline: none;
}
.apply-form input:focus, .apply-form select:focus, .apply-form textarea:focus { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(37, 99, 235, .12); }
.apply-form textarea { resize: vertical; }
.form-tip { font-size: 12px; color: var(--text-3); margin-top: 4px; display: block; }
.captcha-row { display: flex; align-items: center; gap: 10px; }
.captcha-row img { border-radius: 6px; cursor: pointer; border: 1px solid var(--border); }
.captcha-row input { flex: 0 0 160px; }
.btn-link { background: none; border: 0; color: var(--primary); font-size: 13px; cursor: pointer; padding: 4px; }
.form-actions { margin-top: 20px; }

/* ---------- 分页 ---------- */
.pagination { margin: 22px 0; }
.pagination ul { display: flex; flex-wrap: wrap; gap: 6px; list-style: none; justify-content: center; }
.pagination a, .pagination span { display: inline-block; min-width: 34px; padding: 6px 10px; text-align: center; background: #fff; border: 1px solid var(--border); border-radius: 7px; font-size: 13px; color: var(--text-2); }
.pagination a:hover { border-color: var(--primary); color: var(--primary); }
.pagination .active span { background: var(--primary); color: #fff; border-color: var(--primary); }

/* ---------- 空状态 ---------- */
.empty-box { text-align: center; padding: 60px 20px; background: #fff; border: 1px dashed var(--border); border-radius: 14px; color: var(--text-2); }
.empty-box h1, .empty-box h2 { font-size: 20px; margin-bottom: 10px; color: var(--text); }
.empty-box p { margin: 6px 0; font-size: 14px; }

/* ---------- 页脚 ---------- */
.site-footer { background: #fff; border-top: 1px solid var(--border); padding: 22px 0 26px; margin-top: 30px; }
.footer-links { display: flex; flex-wrap: wrap; gap: 6px 16px; font-size: 13px; color: var(--text-2); align-items: center; }
.footer-links a { color: var(--text-2); }
.footer-links a:hover { color: var(--primary); }
.footer-links-title { color: var(--text-3); }
.footer-meta { margin-top: 14px; font-size: 12px; color: var(--text-3); }
.footer-meta p { margin: 2px 0; }
.footer-seo-links { margin-top: 6px !important; }
.footer-seo-links a { color: var(--text-2); margin: 0 2px; }
.footer-seo-links a:hover { color: var(--primary); }
.footer-seo-links .sep { color: var(--border); margin: 0 2px; }

/* ---------- 响应式 ---------- */
@media (max-width: 760px) {
  .header-inner { gap: 12px; }
  .header-search { order: 3; flex-basis: 100%; max-width: none; }
  .site-grid { grid-template-columns: 1fr; }
  .detail-main { flex-direction: column; }
  .captcha-row { flex-wrap: wrap; }
  .logo-text em { display: none; }

  /* 手机端：顶部分类导航栏整体隐藏（全部分类在左上角汉堡抽屉里） */
  .nav-wrap { display: none; }
  .nav-hamburger { display: inline-flex; flex-direction: column; align-items: center; justify-content: center; gap: 5px; width: 40px; height: 40px; flex-shrink: 0; background: #fff; border: 1px solid var(--border); border-radius: 8px; cursor: pointer; }
  .nav-hamburger span { display: block; width: 18px; height: 2px; background: var(--text); border-radius: 2px; }
  .nav-hamburger:active { border-color: var(--primary); }
  .nav-hamburger:active span { background: var(--primary); }

  /* 分类抽屉（左侧滑出） */
  .drawer-mask { display: none; position: fixed; inset: 0; background: rgba(15, 23, 42, .45); z-index: 999; }
  .drawer-mask.show { display: block; }
  .drawer { display: block; position: fixed; top: 0; left: 0; width: 76%; max-width: 320px; height: 100%; background: #fff; z-index: 1000; transform: translateX(-105%); transition: transform .25s ease; overflow-y: auto; box-shadow: 0 0 24px rgba(0, 0, 0, .18); }
  .drawer.open { transform: translateX(0); }
  .drawer-head { padding: 16px 18px; font-size: 15px; font-weight: 600; color: var(--text); border-bottom: 1px solid var(--border); }
  .drawer-nav { padding: 6px 0 12px; }
  .drawer-item { display: flex; align-items: center; gap: 8px; padding: 13px 18px; font-size: 14px; color: var(--text); border-bottom: 1px solid #f1f5f9; }
  .drawer-item:active { background: var(--primary-light); color: var(--primary); }
  .drawer-foot { position: sticky; bottom: 0; display: flex; gap: 10px; padding: 14px 18px; border-top: 1px solid var(--border); background: #fff; }
  .drawer-btn { flex: 1; text-align: center; padding: 11px 0; border-radius: 8px; font-size: 14px; border: 1px solid var(--border); color: var(--text-2); }
  .drawer-btn:active { border-color: var(--primary); color: var(--primary); }
  .drawer-btn-primary { background: var(--primary); border-color: var(--primary); color: #fff; }
  .drawer-btn-primary:active { background: var(--primary-dark); color: #fff; }

  /* 首页分类区块：手机端切换为紧凑图标网格 + 可折叠 */
  .cat-block { margin-bottom: 4px; }  .cat-block-head { cursor: pointer; user-select: none; }
  .cat-fold { display: inline-block; width: 24px; height: 24px; flex-shrink: 0; margin-right: 4px; position: relative; border: 1px solid var(--border); border-radius: 7px; background: #fff; }
  .cat-fold::before, .cat-fold::after { content: ''; position: absolute; left: 50%; top: 50%; width: 12px; height: 2px; background: var(--text-2); border-radius: 2px; transform: translate(-50%, -50%); }
  .cat-fold::after { transform: translate(-50%, -50%) rotate(90deg); transition: transform .2s ease; }
  .cat-block.collapsed .cat-fold::after { transform: translate(-50%, -50%) rotate(0deg); }
  .cat-block.collapsed .cat-block-body { display: none; }
  .cat-block .site-grid { display: none; }               /* 手机端隐藏桌面卡片列表（仅分类区块内） */
  .m-site-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
  .m-site-item { display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 6px; background: var(--card-bg); border: 1px solid var(--border); border-radius: 10px; padding: 12px 4px; text-align: center; min-width: 0; }
  .m-site-item:active { border-color: var(--primary); background: var(--primary-light); }
  .m-site-item .site-logo img { width: 30px; height: 30px; border-radius: 6px; }
  .m-site-item .site-logo { width: 30px; height: 30px; font-size: 16px; }
  .m-site-name { font-size: 12px; color: var(--text); line-height: 1.3; max-width: 100%; display: -webkit-box; -webkit-line-clamp: 1; -webkit-box-orient: vertical; overflow: hidden; word-break: break-all; }
}

/* ========== 文章系统 ========== */
.article-list { display: flex; flex-direction: column; background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.article-item { display: block; padding: 14px 18px; border-bottom: 1px solid var(--border); text-decoration: none; transition: background .15s; }
.article-item:last-child { border-bottom: 0; }
.article-item:hover { background: #eff6ff; }
.article-item-title { display: block; font-size: 15px; font-weight: 600; color: var(--text); }
.article-item:hover .article-item-title { color: var(--primary); }
.article-item-summary { display: block; margin-top: 4px; font-size: 13px; color: #64748b; line-height: 1.6; }
.article-item-meta { display: block; margin-top: 6px; font-size: 12px; color: #94a3b8; }

/* 文章详情 */
.article-detail { background: var(--card-bg); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px 32px; margin-bottom: 24px; box-shadow: var(--shadow); }
.article-title { font-size: 24px; line-height: 1.4; margin: 0 0 10px; color: var(--text); }
.article-meta { font-size: 13px; color: #94a3b8; display: flex; gap: 8px; align-items: center; margin-bottom: 14px; }
.article-summary { font-size: 14px; color: #64748b; line-height: 1.7; background: #eff6ff; border-left: 3px solid var(--primary); padding: 10px 14px; border-radius: 0 8px 8px 0; margin: 0 0 18px; }
.article-content { font-size: 15px; line-height: 1.9; color: var(--text); word-break: break-word; }
.article-content h2 { font-size: 20px; margin: 26px 0 12px; padding-left: 12px; border-left: 4px solid var(--primary); }
.article-content h3 { font-size: 17px; margin: 20px 0 10px; }
.article-content p { margin: 0 0 14px; }
.article-content img { max-width: 100%; height: auto; border-radius: 8px; }
.article-content a { color: var(--primary); text-decoration: underline; }
.article-content ul, .article-content ol { margin: 0 0 14px; padding-left: 24px; }
.article-content li { margin: 4px 0; }
.article-content blockquote { margin: 0 0 14px; padding: 10px 16px; background: var(--bg); border-left: 4px solid var(--border); color: #64748b; border-radius: 0 8px 8px 0; }
.article-content table { border-collapse: collapse; width: 100%; margin: 0 0 14px; }
.article-content table th, .article-content table td { border: 1px solid var(--border); padding: 8px 10px; text-align: left; }
.article-content code { background: var(--bg); padding: 2px 6px; border-radius: 4px; font-size: 13px; }
.article-content pre { margin: 0 0 14px; padding: 14px 16px; background: #0f172a; color: #e2e8f0; border-radius: 8px; overflow-x: auto; font-family: Consolas, Monaco, "Courier New", monospace; font-size: 13px; line-height: 1.7; }
.article-content pre code { background: none; padding: 0; color: inherit; }
.article-content h4 { font-size: 15px; margin: 16px 0 8px; color: #334155; }
.article-content h5 { font-size: 14px; margin: 14px 0 8px; }
.article-content strong { font-weight: 700; }
.article-content hr { border: 0; border-top: 2px solid var(--border); margin: 22px 0; }

/* 手机端文章 */
@media (max-width: 760px) {
  .article-detail { padding: 18px 16px; }
  .article-title { font-size: 19px; }
  .article-item { padding: 12px 14px; }
  .article-content { font-size: 14px; }
}