/* ==========================================================================
   系统镜像下载站 - 全局样式（扁平化设计）
   ========================================================================== */
:root{
  --primary:#2563eb;
  --primary-dark:#1d4ed8;
  --primary-soft:#eff6ff;
  --ink:#0f172a;
  --text:#334155;
  --muted:#64748b;
  --bg:#f4f6fb;
  --card:#ffffff;
  --border:#e5e9f2;
  --success:#16a34a;
  --success-soft:#ecfdf5;
  --danger:#dc2626;
  --danger-soft:#fef2f2;
  --warning:#d97706;
  --warning-soft:#fffbeb;
  --radius:12px;
  --radius-sm:8px;
  --shadow:0 1px 3px rgba(15,23,42,.05),0 8px 28px -16px rgba(15,23,42,.12);
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  --mono:ui-monospace,SFMono-Regular,Consolas,"Liberation Mono",Menlo,monospace;
}
*{box-sizing:border-box;margin:0;padding:0}
html{-webkit-text-size-adjust:100%}
body{font-family:var(--font);color:var(--text);background:var(--bg);line-height:1.6;font-size:15px;min-height:100vh;display:flex;flex-direction:column}
img{max-width:100%}
a{color:var(--primary);text-decoration:none}
a:hover{color:var(--primary-dark)}
h1,h2,h3,h4{color:var(--ink);line-height:1.35;font-weight:700}
code,pre{font-family:var(--mono)}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 20px}
.muted{color:var(--muted)}
.center{text-align:center}
.mono{font-family:var(--mono)}
em{font-style:normal}

/* ============================ 布局 ============================ */
.site-main{flex:1 0 auto}
.section{padding:44px 0}
.section-alt{background:#fff;border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.section-head{display:flex;align-items:baseline;justify-content:space-between;margin-bottom:22px}
.section-title{font-size:22px;position:relative;padding-left:14px}
.section-title::before{content:"";position:absolute;left:0;top:6px;bottom:6px;width:4px;border-radius:2px;background:var(--primary)}
.link-more{font-size:14px;color:var(--muted)}
.link-more:hover{color:var(--primary)}
.page-wrap{padding:28px 0 56px}
.page-head{margin:10px 0 26px}
.page-title{font-size:26px}
.page-sub{color:var(--muted);margin-top:6px;max-width:720px}
.breadcrumb{font-size:13px;color:var(--muted);margin-bottom:18px;display:flex;gap:8px;align-items:center;flex-wrap:wrap}
.breadcrumb a{color:var(--muted)}
.breadcrumb a:hover{color:var(--primary)}
.card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow)}
.empty-state{text-align:center;padding:56px 20px;color:var(--muted)}
.empty-state .btn{margin-top:16px}

/* ============================ 按钮 ============================ */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;border:none;cursor:pointer;border-radius:var(--radius-sm);font-family:var(--font);font-size:14px;font-weight:600;padding:9px 18px;transition:.15s;white-space:nowrap;line-height:1.2}
.btn:active{transform:translateY(1px)}
.btn-primary{background:var(--primary);color:#fff}
.btn-primary:hover{background:var(--primary-dark);color:#fff}
.btn-ghost{background:#fff;color:var(--ink);border:1px solid var(--border)}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary)}
.btn-danger{background:var(--danger);color:#fff}
.btn-danger:hover{background:#b91c1c;color:#fff}
.btn-lg{padding:13px 28px;font-size:15px;border-radius:10px}
.btn-sm{padding:7px 13px;font-size:13px}
.btn-mini{padding:3px 9px;font-size:12px;border-radius:6px;background:var(--primary-soft);color:var(--primary);border:1px solid transparent}
.btn-mini:hover{background:var(--primary);color:#fff}
.btn-mini.danger{background:var(--danger-soft);color:var(--danger)}
.btn-mini.danger:hover{background:var(--danger);color:#fff}
.btn-block{width:100%}

/* ============================ 顶部导航 ============================ */
.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:28px;height:62px}
.brand{display:flex;align-items:center;gap:9px;color:var(--ink);font-weight:700;font-size:18px}
.brand:hover{color:var(--ink)}
.brand-logo{width:34px;height:34px;border-radius:9px;display:inline-flex;align-items:center;justify-content:center;flex:none;overflow:hidden;line-height:0}
.brand-logo-img{width:100%;height:100%;object-fit:cover;display:block;flex:none}
.brand-name{letter-spacing:.3px}
.main-nav{display:flex;gap:4px;flex:1}
.nav-link{color:var(--text);padding:7px 14px;border-radius:8px;font-size:15px;font-weight:500}
.nav-link:hover{color:var(--primary);background:var(--primary-soft)}
.nav-link.active{color:var(--primary);background:var(--primary-soft);font-weight:600}
.header-actions{display:flex;align-items:center;gap:12px}
.nav-toggle{display:none;background:none;border:none;cursor:pointer;padding:6px;flex-direction:column;gap:4px}
.nav-toggle span{width:20px;height:2px;background:var(--ink);border-radius:2px;display:block}
.nav-toggle.open span:nth-child(1){transform:translateY(6px) rotate(45deg)}
.nav-toggle.open span:nth-child(2){opacity:0}
.nav-toggle.open span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}

/* ============================ Hero ============================ */
.hero{background:linear-gradient(135deg,#1e3a8a 0%,#2563eb 55%,#3b82f6 100%);color:#fff;padding:70px 0 64px}
.hero-title{font-size:38px;color:#fff;letter-spacing:.5px;line-height:1.3}
.hero-sub{color:#dbeafe;margin-top:14px;font-size:16px}
.hero-search{display:flex;align-items:center;gap:10px;background:#fff;border-radius:12px;padding:8px 8px 8px 18px;max-width:640px;margin-top:30px;box-shadow:0 10px 30px -10px rgba(0,0,0,.25)}
.hero-search svg{color:var(--muted);flex:none}
.hero-search input{flex:1;border:none;outline:none;font-size:15px;font-family:var(--font);color:var(--ink);background:transparent}
.hero-search .btn{border-radius:8px}
.hero-stats{display:flex;gap:48px;margin-top:36px}
.hero-stat strong{display:block;font-size:28px;color:#fff;font-weight:700}
.hero-stat span{color:#bfdbfe;font-size:13px}

/* ============================ 分类 ============================ */
.category-grid{display:grid;grid-template-columns:repeat(6,1fr);gap:20px}
.category-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:26px 16px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;box-shadow:var(--shadow);transition:.15s;min-height:170px;text-align:center}
.category-card:hover{transform:translateY(-2px);border-color:var(--primary)}
.category-icon{font-size:34px;width:64px;height:64px;border-radius:16px;background:var(--primary-soft);display:flex;align-items:center;justify-content:center;flex:none}
.category-icon img{display:block;max-width:100%;height:auto;flex:none}
.category-info{display:flex;flex-direction:column;gap:4px;min-width:0;width:100%;align-items:center}
.category-name{font-size:17px;font-weight:600;color:var(--ink);line-height:1.35;overflow-wrap:break-word;word-break:break-word;max-width:100%}
.category-meta{font-size:13px;color:var(--muted)}
.category-arrow{display:none}
@media (max-width:767px){.category-grid{grid-template-columns:repeat(2,1fr)}}
.category-card:hover .category-arrow{color:var(--primary)}

/* ============================ 镜像卡片 ============================ */
.mirror-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:18px}
.mirror-grid-4{grid-template-columns:repeat(auto-fill,minmax(230px,1fr))}
.mirror-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:18px;display:flex;flex-direction:column;gap:12px;box-shadow:var(--shadow);transition:.15s}
.mirror-card:hover{transform:translateY(-2px);box-shadow:0 12px 30px -14px rgba(15,23,42,.18)}
.mirror-card-top{display:flex;justify-content:space-between;align-items:center;gap:8px}
.chip{display:inline-flex;align-items:center;gap:4px;font-size:12px;font-weight:600;padding:3px 10px;border-radius:999px;background:var(--bg);color:var(--muted);white-space:nowrap}
.chip-category{background:var(--primary-soft);color:var(--primary)}
.chip-arch{background:#f1f5f9;color:#475569}
.chip-version{background:var(--success-soft);color:var(--success)}
.chip-hot{background:var(--warning-soft);color:var(--warning)}
.mirror-card-title{font-size:16px;margin:0}
.mirror-card-title a{color:var(--ink)}
.mirror-card-title a:hover{color:var(--primary)}
.mirror-card-meta{display:flex;gap:8px;flex-wrap:wrap}
.mirror-version{font-weight:700;color:var(--primary);font-size:14px}
.mirror-edition{color:var(--muted);font-size:13px}
.mirror-card-desc p{font-size:13px;color:var(--muted);line-height:1.55}
.mirror-card-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;border-top:1px solid var(--border);padding-top:12px;gap:10px}
.mirror-card-stats{display:flex;flex-direction:column;gap:2px;font-size:12px;color:var(--muted)}
.mirror-card-stats span{white-space:nowrap}

/* ============================ 热门列表 ============================ */
.hot-list{list-style:none;display:flex;flex-direction:column;gap:10px}
.hot-item{display:flex;align-items:center;gap:16px;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:14px 18px;box-shadow:var(--shadow)}
.hot-rank{width:30px;height:30px;border-radius:8px;background:var(--bg);color:var(--muted);font-weight:700;display:flex;align-items:center;justify-content:center;font-size:14px;flex:none}
.hot-rank.rank-1{background:var(--warning-soft);color:var(--warning)}
.hot-rank.rank-2{background:#f1f5f9;color:#475569}
.hot-rank.rank-3{background:#fef3c7;color:#b45309}
.hot-body{flex:1;min-width:0}
.hot-name{color:var(--ink);font-weight:600}
.hot-name:hover{color:var(--primary)}
.hot-version{color:var(--primary);font-weight:700;font-size:13px}
.hot-meta{font-size:12px;color:var(--muted);margin-top:2px}
.hot-count{font-size:13px;color:var(--muted);flex:none}

/* ============================ 更新动态 ============================ */
.update-list{display:flex;flex-direction:column;gap:10px}
.update-item{display:flex;align-items:center;gap:14px;background:var(--card);border:1px solid var(--border);border-radius:10px;padding:13px 16px;color:var(--text);box-shadow:var(--shadow)}
.update-item:hover{border-color:var(--primary)}
.update-badge{font-size:12px;font-weight:600;background:var(--primary-soft);color:var(--primary);border-radius:999px;padding:3px 10px;white-space:nowrap}
.update-name{flex:1;font-weight:600;color:var(--ink);min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.update-name em{color:var(--primary);font-weight:700}
.update-date{font-size:13px;color:var(--muted);flex:none}

/* ============================ 时间线 ============================ */
.timeline{padding:10px 6px 6px}
.timeline-day{font-size:13px;font-weight:700;color:var(--muted);margin:18px 0 8px;position:sticky;top:0}
.timeline-item{display:flex;align-items:center;gap:14px;padding:11px 10px;border-radius:8px;color:var(--text);position:relative}
.timeline-item:hover{background:var(--primary-soft)}
.timeline-dot{width:9px;height:9px;border-radius:50%;background:var(--primary);flex:none}
.timeline-badge{font-size:12px;font-weight:600;color:var(--primary);background:var(--primary-soft);padding:2px 9px;border-radius:999px;white-space:nowrap}
.timeline-name{flex:1;font-weight:600;color:var(--ink);min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.timeline-name em{color:var(--primary);font-weight:700}
.timeline-arch{font-size:12px;color:var(--muted);flex:none}
.timeline-time{font-size:12px;color:var(--muted);flex:none;font-family:var(--mono)}

/* ============================ 列表页布局 ============================ */
.list-layout{display:grid;grid-template-columns:240px 1fr;gap:24px;align-items:start}
.filter-side{position:sticky;top:78px}
.filter-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:18px;box-shadow:var(--shadow)}
.filter-title{font-size:13px;color:var(--muted);text-transform:uppercase;letter-spacing:.4px;margin:16px 0 8px}
.filter-title:first-child{margin-top:0}
.filter-link{display:flex;align-items:center;justify-content:space-between;gap:8px;padding:7px 10px;border-radius:8px;font-size:14px;color:var(--text);margin-bottom:2px}
.filter-link:hover{background:var(--primary-soft);color:var(--primary)}
.filter-link.active{background:var(--primary);color:#fff;font-weight:600}
.filter-count{font-size:12px;opacity:.75}
.list-main{min-width:0}
.list-toolbar{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:18px;flex-wrap:wrap}
.toolbar-search{display:flex;gap:8px;flex:1;min-width:220px}
.toolbar-search input{flex:1}
.list-total{font-size:13px;color:var(--muted)}

/* ============================ 分页 ============================ */
.pagination{display:flex;align-items:center;justify-content:center;gap:14px;margin-top:26px}
.page-link{background:#fff;border:1px solid var(--border);border-radius:8px;padding:7px 16px;font-size:14px;color:var(--text)}
.page-link:hover{border-color:var(--primary);color:var(--primary)}
.page-current{font-size:13px;color:var(--muted)}

/* ============================ 详情页 ============================ */
.detail-head{display:flex;align-items:flex-start;justify-content:space-between;gap:24px;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:26px 28px;box-shadow:var(--shadow);margin-bottom:20px;flex-wrap:wrap}
.detail-title{font-size:27px;margin-bottom:10px}
.detail-tags{display:flex;gap:8px;flex-wrap:wrap}
.detail-actions{display:flex;gap:10px;flex-direction:column}
.detail-desc{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:22px 26px;box-shadow:var(--shadow);margin-bottom:20px}
.detail-desc p{color:var(--text);white-space:pre-line}
.detail-subtitle{font-size:17px;margin-bottom:14px}
.detail .card{padding:22px 26px}
.detail-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px;margin-bottom:26px}
.info-table{width:100%;border-collapse:collapse;font-size:14px}
.info-table th,.info-table td{padding:9px 4px;border-bottom:1px solid var(--border);text-align:left;vertical-align:top;line-height:1.6}
.info-table th{color:var(--muted);font-weight:500;width:110px}
.info-table tr:last-child th,.info-table tr:last-child td{border-bottom:none}
.checksum-row{display:flex;align-items:center;gap:10px;padding:10px 0;border-bottom:1px solid var(--border);flex-wrap:wrap}
.checksum-row:last-of-type{border-bottom:none}
.checksum-label{font-size:13px;font-weight:600;color:var(--muted);flex:none;width:64px}
.checksum-value{flex:1;min-width:0;word-break:break-all;background:var(--bg);border:1px solid var(--border);border-radius:6px;padding:6px 10px;font-size:12px;line-height:1.5;color:var(--ink);display:inline-flex;align-items:center}
.checksum-hint{font-size:13px;color:var(--muted);margin-top:12px}
.detail-related{margin-top:8px}

/* ============================ 校验页 ============================ */
.verify-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(300px,1fr));gap:20px}
.verify-card{padding:24px}
.verify-os-head{display:flex;align-items:center;gap:12px;margin-bottom:14px}
.verify-os-icon{width:46px;height:46px;border-radius:12px;background:var(--primary-soft);color:var(--primary);display:flex;align-items:center;justify-content:center;flex:none}
.verify-os-head h2{font-size:18px}
.code-block{background:#0f172a;color:#e2e8f0;border-radius:8px;padding:12px 14px;font-size:13px;overflow-x:auto;margin:8px 0 14px;white-space:pre}
.verify-tips{margin:8px 0 0 18px;font-size:13px;color:var(--text)}

/* ============================ 404 ============================ */
.not-found{text-align:center;padding:80px 20px}
.not-found-code{font-size:72px;font-weight:800;color:var(--primary);line-height:1}
.not-found-title{font-size:22px;margin:12px 0 8px}
.not-found .btn{margin-top:18px}

/* ============================ Flash ============================ */
.flash{padding:12px 18px;border-radius:10px;font-size:14px;font-weight:500;margin:16px auto;max-width:1160px}
.flash-success{background:var(--success-soft);color:var(--success);border:1px solid #bbf7d0}
.flash-error{background:var(--danger-soft);color:var(--danger);border:1px solid #fecaca}

/* ============================ 页脚 ============================ */
.site-footer{background:#0f172a;color:#94a3b8;margin-top:auto}
.footer-inner{display:flex;justify-content:space-between;gap:24px;padding:36px 20px 26px;flex-wrap:wrap}
.footer-brand strong{color:#fff;font-size:17px;display:block;margin-bottom:6px}
.footer-brand p{font-size:13px}
.footer-nav{display:flex;gap:20px;align-items:center;flex-wrap:wrap}
.footer-nav a{color:#94a3b8;font-size:14px}
.footer-nav a:hover{color:#fff}
.footer-bottom{border-top:1px solid #1e293b;padding:16px 20px;font-size:12px;text-align:center;color:#64748b}

/* ============================ 后台 ============================ */
.admin-body{background:var(--bg)}
.admin-shell{display:flex;min-height:100vh}
.admin-side{width:228px;background:#0f172a;color:#cbd5e1;display:flex;flex-direction:column;position:fixed;top:0;bottom:0;left:0;z-index:50}
.admin-brand{display:flex;align-items:center;gap:10px;color:#fff;font-weight:700;padding:18px 20px;font-size:16px;border-bottom:1px solid #1e293b}
.admin-brand:hover{color:#fff}
.admin-nav{flex:1;padding:14px 10px;display:flex;flex-direction:column;gap:3px;overflow-y:auto}
.admin-nav-link{display:flex;align-items:center;gap:10px;padding:10px 14px;border-radius:8px;color:#cbd5e1;font-size:14px;font-weight:500}
.admin-nav-link:hover{background:#1e293b;color:#fff}
.admin-nav-link.active{background:var(--primary);color:#fff}
.admin-nav-link.danger{color:#f87171}
.admin-nav-link.danger:hover{background:var(--danger);color:#fff}
.admin-side-foot{padding:12px 10px;border-top:1px solid #1e293b;display:flex;flex-direction:column;gap:3px}
.admin-main{flex:1;margin-left:228px;display:flex;flex-direction:column;min-height:100vh}
.admin-topbar{background:#fff;border-bottom:1px solid var(--border);padding:0 28px;height:62px;display:flex;align-items:center;justify-content:space-between;position:sticky;top:0;z-index:40}
.admin-page-title{font-size:18px}
.admin-user{display:flex;align-items:center;gap:10px;font-size:14px;font-weight:600;color:var(--ink)}
.admin-avatar{width:32px;height:32px;border-radius:50%;background:var(--primary);color:#fff;display:flex;align-items:center;justify-content:center;font-size:14px;font-weight:700}
.admin-content{padding:26px 28px 48px;flex:1}
.admin-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.admin-grid .wide{grid-column:1/-1}
.admin-panel{padding:20px 22px}
.panel-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px;gap:10px;flex-wrap:wrap}
.panel-title{font-size:16px}
.panel-sub{font-size:13px;color:var(--muted);margin-top:4px;width:100%}
.stat-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:16px;margin-bottom:22px}
.storage-banner{display:flex;align-items:center;gap:8px;flex-wrap:wrap;background:var(--card);border:1px solid var(--border);border-left:3px solid #2563eb;border-radius:var(--radius);padding:12px 16px;margin-bottom:22px;font-size:14px;color:var(--muted)}
.storage-banner code{background:var(--bg-alt,#f1f5f9);padding:3px 8px;border-radius:6px;font-size:13px;color:var(--text);word-break:break-all}
.stat-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow)}
.stat-card.accent{background:linear-gradient(135deg,#1d4ed8,#2563eb);border-color:transparent}
.stat-label{font-size:13px;color:var(--muted)}
.stat-card.accent .stat-label{color:#bfdbfe}
.stat-value{font-size:28px;font-weight:700;color:var(--ink);margin:4px 0 2px;font-variant-numeric:tabular-nums}
.stat-card.accent .stat-value{color:#fff}
.stat-hint{font-size:12px;color:var(--muted)}
.stat-card.accent .stat-hint{color:#bfdbfe}
.toolbar{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:18px;flex-wrap:wrap}
.toolbar-form{display:flex;gap:10px;align-items:center;flex-wrap:wrap;flex:1}
.table-scroll{overflow-x:auto}
.data-table{width:100%;border-collapse:collapse;font-size:14px}
.data-table th{background:var(--bg);color:var(--muted);font-weight:600;text-align:left;padding:10px 12px;white-space:nowrap;font-size:13px}
.data-table td{padding:11px 12px;border-bottom:1px solid var(--border);vertical-align:middle}
.data-table tbody tr:hover{background:#fafbff}
.data-table tbody tr:last-child td{border-bottom:none}
.cell-main{font-weight:600;color:var(--ink)}
.cell-sub{font-size:12px;color:var(--muted)}
.row-actions{display:flex;gap:6px;align-items:center;flex-wrap:nowrap}
.inline-form{display:inline-flex}
.status{display:inline-block;font-size:12px;font-weight:600;padding:2px 10px;border-radius:999px}
.status-on{background:var(--success-soft);color:var(--success)}
.status-off{background:var(--bg);color:var(--muted)}
.ua-cell{max-width:220px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}

/* 表单 */
.form-stack{display:flex;flex-direction:column;gap:16px}
.form-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px}
.form-field{display:flex;flex-direction:column;gap:6px}
.form-label{font-size:14px;font-weight:600;color:var(--ink)}
.form-label em{color:var(--danger)}
.form-input,.form-select,.form-textarea{border:1px solid var(--border);border-radius:8px;padding:9px 12px;font-size:14px;font-family:var(--font);color:var(--ink);background:#fff;width:100%;transition:.15s;outline:none}
.form-input:focus,.form-select:focus,.form-textarea:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(37,99,235,.12)}
.form-select{appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center;padding-right:34px}
.form-textarea{resize:vertical;min-height:90px}
.form-hint{font-size:12px;color:var(--muted)}
.form-divider{font-size:13px;font-weight:700;color:var(--primary);border-bottom:1px solid var(--border);padding-bottom:8px;margin-top:6px}
.form-check{display:flex;align-items:center;gap:8px;font-size:14px;cursor:pointer}
.form-check input{width:16px;height:16px;accent-color:var(--primary)}
.form-actions{display:flex;gap:10px;padding-top:6px}
.error-list{margin-left:18px}
.btn[type=submit].danger{background:var(--danger);color:#fff}

/* 柱状图 */
.bar-chart{display:flex;align-items:flex-end;gap:5px;height:170px;padding:10px 4px 0}
.bar-col{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:flex-end;gap:6px;height:100%;min-width:0}
.bar{width:100%;max-width:30px;background:linear-gradient(180deg,#3b82f6,#2563eb);border-radius:4px 4px 0 0;transition:.2s;min-height:2px}
.bar-col:hover .bar{background:#1d4ed8}
.bar-label{font-size:9px;color:var(--muted);white-space:nowrap;transform:rotate(-35deg);transform-origin:top center}

/* ============================ 登录页 ============================ */
.login-body{background:linear-gradient(135deg,#0f172a,#1e3a8a);min-height:100vh;display:flex;align-items:center;justify-content:center;padding:20px}
.login-wrap{width:100%;max-width:400px}
.login-card{background:#fff;border-radius:16px;padding:34px 32px;box-shadow:0 20px 50px -20px rgba(0,0,0,.4)}
.login-brand{display:flex;align-items:center;justify-content:center;gap:10px;font-size:18px;font-weight:700;color:var(--ink);margin-bottom:24px}
.login-brand:hover{color:var(--ink)}
.login-form{display:flex;flex-direction:column;gap:16px}
.login-hint{font-size:12px;color:var(--muted);text-align:center;margin-top:16px}
.login-back{display:block;text-align:center;font-size:13px;margin-top:14px;color:var(--muted)}
.login-back:hover{color:var(--primary)}
.login-body .flash{margin:0 0 16px;max-width:none}

/* ============================ 响应式 ============================ */
@media (max-width:1024px){
  .list-layout{grid-template-columns:1fr}
  .filter-side{position:static}
  .detail-grid{grid-template-columns:1fr}
  .admin-grid{grid-template-columns:1fr}
}
@media (max-width:768px){
  .header-inner{height:56px;gap:12px}
  .main-nav{position:absolute;top:56px;left:0;right:0;background:#fff;border-bottom:1px solid var(--border);flex-direction:column;padding:10px 16px;display:none;box-shadow:0 12px 24px -16px rgba(15,23,42,.2)}
  .main-nav.open{display:flex}
  .nav-toggle{display:flex}
  .nav-link{padding:11px 12px;font-size:15px}
  .hero{padding:48px 0 44px}
  .hero-title{font-size:27px}
  .hero-stats{gap:24px}
  .hero-stat strong{font-size:22px}
  .section{padding:32px 0}
  .section-title{font-size:19px}
  .mirror-grid{grid-template-columns:repeat(auto-fill,minmax(100%,1fr))}
  .detail-head{padding:20px}
  .detail-title{font-size:22px}
  .detail-actions{flex-direction:row;flex-wrap:wrap}
  .hot-count{display:none}
  .admin-side{width:auto;position:static;min-height:auto;flex-direction:row;align-items:center;overflow-x:auto}
  .admin-brand{display:none}
  .admin-nav{flex-direction:row;padding:8px;gap:6px;overflow-x:auto}
  .admin-nav-link{white-space:nowrap;padding:8px 12px}
  .admin-side-foot{display:none}
  .admin-main{margin-left:0}
  .admin-topbar{padding:0 16px}
  .admin-content{padding:18px 16px 40px}
  .stat-cards{grid-template-columns:repeat(2,1fr)}
  .admin-grid{grid-template-columns:1fr}
}

/* ==========================================================================
   增强功能：深色模式 / 公告 / 多线路 / 系统设置
   ========================================================================== */

/* ---------- 深色模式 ---------- */
html[data-theme="dark"]{
  --primary:#3b82f6;
  --primary-dark:#60a5fa;
  --primary-soft:#1e293b;
  --ink:#e2e8f0;
  --text:#cbd5e1;
  --muted:#94a3b8;
  --bg:#0b1220;
  --card:#111a2c;
  --border:#22304a;
  --success:#22c55e;
  --success-soft:#052e16;
  --danger:#ef4444;
  --danger-soft:#3b0a0a;
  --warning:#f59e0b;
  --warning-soft:#3b2a05;
  --shadow:0 1px 3px rgba(0,0,0,.4),0 10px 30px -18px rgba(0,0,0,.6);
}
html[data-theme="dark"] body{background:var(--bg)}
html[data-theme="dark"] .site-header,
html[data-theme="dark"] .section-alt,
html[data-theme="dark"] .footer-inner{background:var(--card);border-color:var(--border)}
html[data-theme="dark"] .main-nav{background:var(--card)}
html[data-theme="dark"] .hero{background:linear-gradient(135deg,#0f172a 0%,#1e3a8a 60%,#1d4ed8 100%)}
html[data-theme="dark"] .btn-ghost{background:var(--card);color:var(--ink);border-color:var(--border)}
html[data-theme="dark"] .form-input,.form-select,.form-textarea{background:var(--card);color:var(--ink);border-color:var(--border)}
html[data-theme="dark"] .hero-search{background:var(--card)}
html[data-theme="dark"] .hero-search input{color:var(--ink)}
html[data-theme="dark"] .login-card{background:var(--card)}
html[data-theme="dark"] .announce-bar{background:var(--warning-soft);border-color:var(--border)}
html[data-theme="dark"] .footer-nav a{color:var(--muted)}
html[data-theme="dark"] .hot-item{background:var(--card);border-color:var(--border)}

/* ---------- 主题切换按钮 ---------- */
.theme-toggle{background:var(--primary-soft);border:1px solid var(--border);border-radius:9px;width:34px;height:34px;display:inline-flex;align-items:center;justify-content:center;cursor:pointer;color:var(--ink);transition:.15s}
.theme-toggle:hover{border-color:var(--primary);color:var(--primary)}
.theme-toggle svg{display:block}

/* ---------- 公告条 ---------- */
.announce-bar{background:var(--warning-soft);border-bottom:1px solid var(--border);font-size:13px}
.announce-bar-inner{display:flex;align-items:center;gap:10px;padding:8px 0;color:var(--text)}
.announce-bar .announce-label{font-weight:700;color:var(--warning);flex:none}
.announce-bar .announce-item{overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.announce-bar .announce-more{margin-left:auto;flex:none;color:var(--muted);font-size:12px}
.announce-bar .announce-more:hover{color:var(--primary)}

/* ---------- 公告列表页 ---------- */
.announce-list{display:flex;flex-direction:column;gap:16px}
.announce-item-card{background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:20px 22px;box-shadow:var(--shadow)}
.announce-item-card h3{font-size:17px;margin-bottom:6px}
.announce-item-card .announce-date{font-size:12px;color:var(--muted);margin-bottom:10px}
.announce-item-card .announce-content{color:var(--text);font-size:14px;white-space:pre-line}

/* ---------- API 页说明 ---------- */
.api-tip{background:var(--primary-soft);border:1px solid var(--border);border-radius:var(--radius);padding:14px 18px;font-size:13px;margin-bottom:18px;color:var(--text)}

/* ================= 用户中心（登录/注册/账户） ================= */
/* 顶栏用户区 */
.header-user{display:inline-flex;align-items:center;gap:6px}
.user-chip{display:inline-flex;align-items:center;gap:6px;text-decoration:none}
.user-chip.active{border-color:var(--primary);color:var(--primary)}
.user-avatar{display:inline-flex;align-items:center;justify-content:center;width:20px;height:20px;border-radius:50%;background:var(--primary);color:#fff;font-size:12px;font-weight:700;flex:none}
.header-user .user-name{max-width:110px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.admin-link{display:inline-flex}

/* 登录/注册卡片 */
.auth-wrap{display:flex;justify-content:center;padding:56px 16px 72px}
.auth-card{width:100%;max-width:420px;background:var(--card);border:1px solid var(--border);border-radius:16px;padding:40px 36px;box-shadow:0 2px 6px rgba(15,23,42,.04),0 24px 56px -28px rgba(15,23,42,.20)}
.auth-head{text-align:center;margin-bottom:26px}
.auth-logo{width:64px;height:64px;margin:0 auto 16px;display:flex;align-items:center;justify-content:center;border-radius:16px;background:var(--primary-soft);color:var(--primary)}
.auth-title{font-size:22px;font-weight:800;color:var(--ink);letter-spacing:.3px}
.auth-sub{font-size:13px;color:var(--muted);margin-top:6px}
.auth-form{display:flex;flex-direction:column;gap:18px}
.form-field{display:flex;flex-direction:column;gap:7px}
.form-label{font-size:13px;font-weight:600;color:var(--ink)}
.form-label em{color:var(--danger);font-style:normal}
.form-hint{font-size:12px;color:var(--muted)}
.form-divider{font-size:13px;font-weight:700;color:var(--muted);border-top:1px dashed var(--border);padding-top:14px;margin-top:2px}
.auth-form .input{width:100%;box-sizing:border-box;padding:12px 14px;font-size:14px;border:1px solid var(--border);border-radius:10px;background:var(--bg);color:var(--ink);transition:border-color .15s,box-shadow .15s,background .15s}
.auth-form .input::placeholder{color:#9aa4b5}
.auth-form .input:focus{outline:none;border-color:var(--primary);background:#fff;box-shadow:0 0 0 3px var(--primary-soft)}
.auth-form .btn-block{padding:12px;font-size:15px;border-radius:10px;margin-top:2px}
.btn-block{width:100%;justify-content:center}
.auth-foot{text-align:center;font-size:13px;color:var(--muted);margin-top:20px}
.auth-foot a{color:var(--primary);font-weight:600}
.auth-foot a:hover{text-decoration:underline}

/* 账户页 */
.account-head{display:flex;align-items:center;gap:18px;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);padding:24px 26px;margin-bottom:20px;box-shadow:var(--shadow);flex-wrap:wrap}
.account-avatar-lg{display:flex;align-items:center;justify-content:center;width:64px;height:64px;border-radius:50%;background:var(--primary);color:#fff;font-size:28px;font-weight:800;flex:none}
.account-id{flex:1;min-width:180px}
.account-id .page-title{margin-bottom:2px}
.account-stats{display:flex;gap:26px;flex-wrap:wrap}
.stat-box{display:flex;flex-direction:column;align-items:center;gap:2px}
.stat-box b{font-size:20px;color:var(--ink)}
.stat-box span{font-size:12px;color:var(--muted)}

/* Tab 页签 */
.tabs{display:flex;gap:8px;border-bottom:1px solid var(--border);margin-bottom:20px;flex-wrap:wrap}
.tab-btn{border:none;background:none;padding:10px 16px;font-size:14px;font-weight:600;color:var(--muted);cursor:pointer;border-bottom:2px solid transparent;margin-bottom:-1px;font-family:var(--font)}
.tab-btn:hover{color:var(--ink)}
.tab-btn.active{color:var(--primary);border-bottom-color:var(--primary)}
.tab-pane{display:none}
.tab-pane.active{display:block}

/* 通用数据表格（下载历史） */
.table-wrap{overflow-x:auto;background:var(--card);border:1px solid var(--border);border-radius:var(--radius)}
.data-table{width:100%;border-collapse:collapse;font-size:14px}
.data-table th,.data-table td{padding:12px 14px;text-align:left;border-bottom:1px solid var(--border)}
.data-table thead th{background:var(--primary-soft);font-weight:700;color:var(--ink);font-size:13px}
.data-table tbody tr:last-child td{border-bottom:none}
.data-table a{color:var(--primary);font-weight:600}
.data-table a:hover{text-decoration:underline}
.account-form{max-width:460px}

/* ================= 搜索联想下拉 ================= */
.suggest-wrap{position:relative;flex:1;display:flex}
.hero-search .suggest-wrap{flex:1}
.toolbar-search .suggest-wrap{flex:1}
.suggest-wrap input[type=search]{width:100%}
.suggest-box{position:absolute;top:calc(100% + 6px);left:0;right:0;background:var(--card);border:1px solid var(--border);border-radius:var(--radius);box-shadow:0 10px 30px -8px rgba(15,23,42,.28);overflow:hidden;z-index:50;max-height:340px;overflow-y:auto}
.suggest-item{display:flex;align-items:center;gap:10px;padding:10px 14px;border-bottom:1px solid var(--border);text-decoration:none;color:var(--text)}
.suggest-item:last-child{border-bottom:none}
.suggest-item:hover{background:var(--primary-soft)}
.suggest-icon{flex:none;width:24px;text-align:center}
.suggest-name{font-weight:600;color:var(--ink)}
.suggest-meta{font-size:12px;color:var(--muted);margin-left:auto;text-align:right;white-space:nowrap}
html[data-theme="dark"] .suggest-box{background:var(--card);border-color:var(--border)}
html[data-theme="dark"] .suggest-item:hover{background:rgba(37,99,235,.12)}

@media (max-width:640px){
  .header-user .user-name{max-width:70px}
  .account-head{flex-direction:column;align-items:flex-start}
  .account-stats{width:100%;justify-content:space-between}
  .suggest-meta{display:none}
}
.api-tip code{background:rgba(37,99,235,.08);padding:2px 6px;border-radius:5px}

/* ===== 标签云 & 排行榜 & 关键词高亮（扩展功能） ===== */
.tag-cloud{display:flex;flex-wrap:wrap;gap:8px}
.tag-pill{display:inline-flex;align-items:center;gap:5px;padding:4px 10px;border:1px solid var(--border);border-radius:999px;font-size:12px;color:var(--primary);background:var(--card);text-decoration:none;transition:all .15s}
.tag-pill:hover{border-color:var(--primary);background:var(--primary-soft)}
.tag-pill.active{background:var(--primary);color:#fff;border-color:var(--primary)}
.tag-count{font-size:11px;color:var(--muted)}
.tag-pill.active .tag-count{color:rgba(255,255,255,.85)}
.chip-tag{color:var(--primary);border-color:var(--primary);text-decoration:none}
.chip-tag:hover{background:var(--primary);color:#fff}
mark{background:rgba(255,200,0,.4);color:inherit;padding:0 2px;border-radius:3px}
html[data-theme="dark"] mark{background:rgba(255,190,0,.35);color:#fff}
.rank-table{overflow:hidden}
.rank-table .info-table{margin:0}
.rank-inner td,.rank-inner th{padding:12px 14px}
.rank-col{width:64px}
.rank-action{width:150px;text-align:right;white-space:nowrap}
.rank-badge{display:inline-flex;align-items:center;justify-content:center;width:28px;height:28px;border-radius:50%;font-weight:700;font-size:13px}
.rank-badge.top{background:var(--primary);color:#fff}
.rank-badge.normal{background:var(--primary-soft);color:var(--primary)}
.rank-name{font-weight:700;color:var(--ink);text-decoration:none}
.rank-name:hover{color:var(--primary)}
.rank-edition{margin-left:6px;font-size:12px;color:var(--muted)}
.rank-count{font-weight:700;color:var(--primary)}
@media (max-width:720px){
  .rank-table .info-table{min-width:640px}
  .rank-table{overflow-x:auto}
}

/* ===== 工具下载（扩展功能） ===== */
.tool-download-block{margin-top:48px;padding-top:8px}
.tool-block-head{margin-bottom:18px}
.tool-cat{margin-bottom:26px}
.tool-cat-title{font-size:17px;margin-bottom:14px;display:flex;align-items:center;gap:10px}
.tool-cat-title::before{content:"";width:4px;height:16px;border-radius:2px;background:var(--primary)}
.tool-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.tool-card{display:flex;flex-direction:column;gap:10px;padding:18px}
.tool-card:hover{border-color:var(--primary)}
.tool-card-head{display:flex;align-items:center;gap:12px}
.tool-card-icon{width:42px;height:42px;border-radius:10px;background:var(--primary-soft);display:inline-flex;align-items:center;justify-content:center;font-size:22px;flex:none}
.tool-card-meta{display:flex;flex-direction:column;min-width:0}
.tool-name{font-size:15px;font-weight:700;color:var(--ink);overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.tool-version{font-size:12px;color:var(--muted)}
.tool-desc{font-size:13px;color:var(--muted);line-height:1.6;flex:1}
.tool-card-actions{display:flex;gap:8px;margin-top:2px}
.tool-card-actions .btn{flex:1}
@media (max-width:960px){.tool-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:560px){.tool-grid{grid-template-columns:1fr}}

/* ===== 后台工具管理（扩展功能） ===== */
.admin-head{display:flex;align-items:center;justify-content:space-between;gap:12px;flex-wrap:wrap;margin-bottom:16px}
.tool-icon-cell{font-size:20px;text-align:center}
.badge{display:inline-flex;align-items:center;padding:2px 9px;border-radius:999px;font-size:12px;background:var(--primary-soft);color:var(--primary)}
.btn-mini.warning{background:var(--warning-soft);color:var(--warning)}
.btn-mini.warning:hover{background:var(--warning);color:#fff}
.alert-error{background:var(--danger-soft);border:1px solid var(--danger);color:var(--danger);border-radius:var(--radius-sm);padding:12px 16px;margin-bottom:16px}
.alert-error ul{list-style:none;padding:0;margin:0}
.checkbox-label{display:inline-flex;align-items:center;gap:7px;font-size:14px;color:var(--text);cursor:pointer}
.checkbox-label input{width:16px;height:16px;accent-color:var(--primary)}
.mb-0{margin-bottom:0}
.inline-form{display:inline-flex;gap:6px}
.admin-content .panel-head{margin-bottom:16px}

/* 站点 Logo 设置 */
.logo-field{display:flex;align-items:center;gap:16px;flex-wrap:wrap}
.logo-preview{width:56px;height:56px;border-radius:12px;border:1px solid var(--border);background:#fff;display:flex;align-items:center;justify-content:center;overflow:hidden;flex:none}
.logo-preview img{width:100%;height:100%;object-fit:cover;display:block}
.logo-actions{display:flex;flex-direction:column;gap:8px;flex:1;min-width:220px}
.logo-actions .form-input{width:auto}
html[data-theme="dark"] .logo-preview{background:var(--card);border-color:var(--border)}

/* 后台镜像表单：多线路源行 & 本地文件选择 */
.source-row{display:flex;gap:10px;align-items:center;margin-bottom:10px}
.source-row .form-input{flex:1;min-width:0}
.source-row .btn{flex:none}
.file-pick-row{display:flex;gap:12px;align-items:center}
.file-pick-row .btn{flex:none}
.file-input-hidden{position:absolute;width:1px;height:1px;opacity:0;overflow:hidden;clip:rect(0 0 0 0);white-space:nowrap}
.file-pick-name{font-size:13px;color:var(--muted);word-break:break-all}