/* ============ 数码对比 · 全局样式 ============ */
:root {
  --bg: #0d1117;
  --bg-soft: #11161d;
  --card: #161b22;
  --card-hover: #1c232d;
  --border: #2d333b;
  --border-strong: #3d444d;
  --text: #e6edf3;
  --text-dim: #9198a1;
  --accent: #4f8cff;
  --accent-2: #22d3ee;
  --accent-grad: linear-gradient(135deg, #4f8cff, #22d3ee);
  --good: #3fb950;
  --diff: #d29922;
  --danger: #f85149;
  --radius: 10px;
  --shadow: 0 4px 20px rgba(0, 0, 0, .35);
  --header-bg: rgba(13,17,23,.85);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
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;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 20px; }
main { flex: 1; padding: 28px 0 60px; }
h1, h2, h3 { line-height: 1.3; }
button { font-family: inherit; cursor: pointer; }

/* ============ 顶栏 ============ */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: var(--header-bg);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; gap: 24px; height: 62px; }
.logo { display: flex; align-items: center; gap: 8px; font-size: 20px; font-weight: 800; color: var(--text); }
.logo:hover { text-decoration: none; }
.logo-icon { font-size: 24px; }
.main-nav { display: flex; gap: 4px; }
.main-nav a {
  color: var(--text-dim); padding: 8px 14px; border-radius: 8px; font-weight: 500;
  transition: color .15s, background .15s;
}
.main-nav a:hover { color: var(--text); background: var(--card); text-decoration: none; }
.main-nav a.active { color: #fff; background: rgba(79, 140, 255, .15); }
.header-search { margin-left: auto; display: flex; gap: 6px; }
.header-search input {
  width: 230px; padding: 8px 12px; border-radius: 8px; border: 1px solid var(--border-strong);
  background: var(--card); color: var(--text); outline: none;
}
.header-search input:focus { border-color: var(--accent); }
.header-search button {
  padding: 8px 16px; border: none; border-radius: 8px; background: var(--accent-grad); color: #fff; font-weight: 600;
}

/* ============ 页脚 ============ */
.site-footer { border-top: 1px solid var(--border); padding: 22px 0; color: var(--text-dim); font-size: 13px; }
.site-footer .container { display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px; }
.site-footer a { color: var(--text-dim); }

/* ============ 通用组件 ============ */
.page-title { font-size: 26px; margin: 6px 0 4px; }
.page-sub { color: var(--text-dim); margin: 0 0 22px; }
.card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); }
.btn {
  display: inline-flex; align-items: center; gap: 6px; padding: 8px 16px; border-radius: 8px;
  border: 1px solid var(--border-strong); background: var(--card); color: var(--text);
  font-size: 14px; font-weight: 500; transition: all .15s;
}
.btn:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }
.btn-primary { background: var(--accent-grad); border: none; color: #fff; }
.btn-primary:hover { filter: brightness(1.1); color: #fff; }
.btn-danger { border-color: rgba(248, 81, 73, .5); color: var(--danger); }
.btn-danger:hover { background: rgba(248, 81, 73, .1); border-color: var(--danger); }
.btn-sm { padding: 4px 10px; font-size: 13px; }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.badge {
  display: inline-block; padding: 2px 10px; border-radius: 999px; font-size: 12px;
  background: rgba(79, 140, 255, .15); color: var(--accent);
}
.badge-warn { background: rgba(210, 153, 34, .15); color: var(--diff); }
.muted { color: var(--text-dim); }
.text-danger { color: var(--danger); }

/* ============ 首页 ============ */
.hero {
  text-align: center; padding: 56px 20px 40px;
  background: radial-gradient(600px 260px at 50% -40px, rgba(79, 140, 255, .18), transparent 70%);
}
.hero h1 { font-size: 40px; margin: 0 0 10px; }
.hero p { color: var(--text-dim); font-size: 17px; margin: 0 0 26px; }
.hero-search { display: flex; justify-content: center; gap: 8px; }
.hero-search input {
  width: min(560px, 80vw); padding: 13px 18px; font-size: 16px; border-radius: 12px;
  border: 1px solid var(--border-strong); background: var(--card); color: var(--text); outline: none;
}
.hero-search input:focus { border-color: var(--accent); box-shadow: 0 0 0 3px rgba(79, 140, 255, .2); }
.hero-search button {
  padding: 13px 26px; font-size: 16px; border: none; border-radius: 12px;
  background: var(--accent-grad); color: #fff; font-weight: 600;
}

.section { margin-top: 40px; }
.section-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; }
.section-head h2 { margin: 0; font-size: 22px; }
.section-head a { font-size: 14px; }

.cat-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); gap: 14px; }
.cat-card {
  display: flex; align-items: center; gap: 12px; padding: 18px; border-radius: var(--radius);
  background: var(--card); border: 1px solid var(--border); transition: transform .15s, border-color .15s;
}
.cat-card:hover { transform: translateY(-2px); border-color: var(--accent); text-decoration: none; }
.cat-card .icon { font-size: 30px; }
.cat-card .name { font-weight: 700; color: var(--text); }
.cat-card .count { font-size: 12px; color: var(--text-dim); }

/* 产品卡片 */
.product-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 16px; }
.product-card {
  position: relative; background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; transition: transform .15s, border-color .15s, box-shadow .15s; display: flex; flex-direction: column;
}
.product-card:hover { transform: translateY(-3px); border-color: var(--border-strong); box-shadow: var(--shadow); }
.product-thumb {
  aspect-ratio: 16/9; display: flex; align-items: center; justify-content: center;
  font-size: 46px; font-weight: 800; color: rgba(255, 255, 255, .9);
  background: linear-gradient(135deg, #1f2a3d, #22303f); position: relative;
}
.product-thumb .thumb-text { letter-spacing: 2px; }
.product-body { padding: 14px 16px 16px; flex: 1; display: flex; flex-direction: column; gap: 6px; }
.product-brand { font-size: 12px; color: var(--text-dim); text-transform: uppercase; letter-spacing: .5px; }
.product-name { font-weight: 700; font-size: 15px; line-height: 1.4; color: var(--text); }
.product-name:hover { color: var(--accent); text-decoration: none; }
.product-summary {
  font-size: 12.5px; color: var(--text-dim); display: -webkit-box; -webkit-line-clamp: 2;
  -webkit-box-orient: vertical; overflow: hidden; margin: 0;
}
.product-meta { display: flex; align-items: center; justify-content: space-between; margin-top: auto; }
.product-price { font-weight: 800; color: var(--accent-2); font-size: 16px; }
.product-price.none { color: var(--text-dim); font-weight: 500; font-size: 13px; }
.compare-check { display: flex; align-items: center; gap: 6px; font-size: 13px; color: var(--text-dim); cursor: pointer; }
.compare-check input { accent-color: var(--accent); width: 16px; height: 16px; cursor: pointer; }

/* 对比浮动条 */
.compare-bar {
  position: fixed; left: 50%; bottom: 22px; transform: translateX(-50%) translateY(120%);
  display: flex; align-items: center; gap: 14px; padding: 12px 18px; border-radius: 14px;
  background: var(--card); border: 1px solid var(--border-strong); box-shadow: var(--shadow);
  transition: transform .25s ease; z-index: 60; max-width: 90vw;
}
.compare-bar.show { transform: translateX(-50%) translateY(0); }
.compare-bar .info { font-size: 14px; }
.compare-bar .info strong { color: var(--accent-2); }

/* ============ 列表页 ============ */
.list-layout { display: grid; grid-template-columns: 220px 1fr; gap: 24px; align-items: start; }
.filter-card { padding: 16px; position: sticky; top: 78px; }
.filter-card h3 { margin: 0 0 10px; font-size: 14px; color: var(--text-dim); }
.filter-card + .filter-card { margin-top: 14px; }
.filter-list { list-style: none; margin: 0; padding: 0; }
.filter-list li { margin: 2px 0; }
.filter-list a {
  display: block; padding: 6px 10px; border-radius: 8px; color: var(--text-dim); font-size: 14px;
}
.filter-list a:hover { background: var(--card-hover); color: var(--text); text-decoration: none; }
.filter-list a.active { background: rgba(79, 140, 255, .15); color: var(--accent); font-weight: 600; }
.filter-list .count { float: right; font-size: 12px; opacity: .7; }
.list-topbar { display: flex; align-items: center; justify-content: space-between; margin-bottom: 16px; flex-wrap: wrap; gap: 10px; }
.list-topbar .result-info { color: var(--text-dim); font-size: 14px; }
.sort-select { padding: 8px 12px; border-radius: 8px; border: 1px solid var(--border-strong); background: var(--card); color: var(--text); outline: none; }

.pagination { display: flex; justify-content: center; gap: 6px; margin-top: 28px; flex-wrap: wrap; }
.pagination a, .pagination span {
  min-width: 36px; padding: 7px 12px; text-align: center; border-radius: 8px;
  border: 1px solid var(--border); color: var(--text-dim); font-size: 14px;
}
.pagination a:hover { border-color: var(--accent); color: var(--accent); text-decoration: none; }
.pagination .current { background: var(--accent-grad); border: none; color: #fff; font-weight: 600; }

.empty { text-align: center; padding: 60px 20px; color: var(--text-dim); }
.empty .big { font-size: 46px; margin-bottom: 10px; }

/* ============ 详情页 ============ */
.crumb { font-size: 13px; color: var(--text-dim); margin-bottom: 16px; }
.crumb a { color: var(--text-dim); }
.product-hero { display: grid; grid-template-columns: 320px 1fr; gap: 30px; padding: 24px; }
.product-hero .thumb {
  aspect-ratio: 4/3; border-radius: 12px; display: flex; align-items: center; justify-content: center;
  font-size: 70px; font-weight: 800; color: rgba(255, 255, 255, .92);
  background: linear-gradient(135deg, #1f2a3d, #22303f);
}
.product-hero h1 { margin: 4px 0 6px; font-size: 26px; }
.product-hero .model { color: var(--text-dim); font-size: 14px; margin-bottom: 12px; }
.product-hero .price { font-size: 30px; font-weight: 800; color: var(--accent-2); margin-bottom: 10px; }
.product-hero .summary { color: var(--text-dim); font-size: 14.5px; }
.hero-meta { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 14px; }
.spec-section { margin-top: 26px; }
.spec-section h2 { font-size: 18px; margin: 0 0 12px; display: flex; align-items: center; gap: 8px; }
.spec-table { width: 100%; border-collapse: collapse; background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); overflow: hidden; }
.spec-table th, .spec-table td { padding: 11px 16px; text-align: left; border-bottom: 1px solid var(--border); font-size: 14px; }
.spec-table th { width: 200px; color: var(--text-dim); font-weight: 500; background: var(--bg-soft); }
.spec-table tr:last-child th, .spec-table tr:last-child td { border-bottom: none; }

/* ============ 对比页 ============ */
.compare-toolbar { display: flex; align-items: center; gap: 10px; margin-bottom: 18px; flex-wrap: wrap; }
.compare-toolbar .spacer { flex: 1; }
.toggle { display: inline-flex; align-items: center; gap: 6px; padding: 8px 14px; border-radius: 8px; border: 1px solid var(--border-strong); background: var(--card); color: var(--text-dim); font-size: 13.5px; }
.toggle.on { color: var(--accent); border-color: var(--accent); background: rgba(79, 140, 255, .1); }
.compare-wrap { overflow-x: auto; border: 1px solid var(--border); border-radius: var(--radius); background: var(--card); }
.compare-table { border-collapse: collapse; width: 100%; min-width: 720px; }
.compare-table th, .compare-table td { padding: 10px 14px; text-align: center; border: 1px solid var(--border); font-size: 13.5px; }
.compare-table th { color: var(--text-dim); font-weight: 500; }
.compare-table .col-spec { position: sticky; left: 0; background: var(--bg-soft); text-align: left; min-width: 150px; max-width: 220px; z-index: 2; }
.compare-table .col-spec strong { color: var(--text-dim); font-weight: 500; }
.compare-table .group-row td { background: rgba(79, 140, 255, .08); font-weight: 700; color: var(--accent-2); text-align: left; }
.compare-table .product-col { min-width: 170px; vertical-align: top; }
.compare-table tr.important .col-spec strong, .compare-table tr.important td { font-weight: 700; }
.compare-table td.diff { background: rgba(210, 153, 34, .12); }
.compare-table tr.has-diff td { box-shadow: inset 0 -1px 0 rgba(210,153,34,.15); }
.compare-table td.best { color: var(--good); font-weight: 800; }
.compare-table td.best::after { content: " ★"; font-size: 12px; }
.compare-product { display: flex; flex-direction: column; align-items: center; gap: 8px; padding: 6px 4px; }
.compare-product .mini-thumb {
  width: 64px; height: 64px; border-radius: 10px; display: flex; align-items: center; justify-content: center;
  font-size: 26px; font-weight: 800; color: rgba(255,255,255,.9);
  background: linear-gradient(135deg, #1f2a3d, #22303f);
}
.compare-product .cp-name { font-weight: 700; font-size: 13.5px; color: var(--text); line-height: 1.35; }
.compare-product .cp-price { color: var(--accent-2); font-weight: 700; font-size: 13.5px; }
.compare-product .cp-remove { font-size: 12px; color: var(--text-dim); }
.compare-product .cp-remove:hover { color: var(--danger); text-decoration: none; }

/* 添加产品面板 */
.add-panel { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 16px; margin-bottom: 18px; display: none; }
.add-panel.open { display: block; }
.add-panel input[type=search] { width: 100%; padding: 10px 14px; border-radius: 8px; border: 1px solid var(--border-strong); background: var(--bg); color: var(--text); outline: none; font-size: 14px; }
.add-panel input:focus { border-color: var(--accent); }
.search-results { margin-top: 12px; display: grid; grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); gap: 10px; }
.search-result {
  display: flex; align-items: center; gap: 10px; padding: 10px; border-radius: 8px;
  border: 1px solid var(--border); background: var(--bg-soft); cursor: pointer;
}
.search-result:hover { border-color: var(--accent); }
.search-result.disabled { opacity: .45; cursor: not-allowed; }
.search-result .sr-thumb {
  width: 38px; height: 38px; border-radius: 8px; display: flex; align-items: center; justify-content: center;
  font-size: 16px; font-weight: 700; background: linear-gradient(135deg, #1f2a3d, #22303f); flex-shrink: 0;
}
.search-result .sr-name { font-size: 13px; font-weight: 600; }
.search-result .sr-meta { font-size: 11.5px; color: var(--text-dim); }

/* ============ 管理后台 ============ */
.admin-layout { display: grid; grid-template-columns: 200px 1fr; gap: 24px; align-items: start; }
.admin-nav { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 12px; position: sticky; top: 78px; }
.admin-nav a { display: block; padding: 9px 12px; border-radius: 8px; color: var(--text-dim); font-size: 14px; }
.admin-nav a:hover { background: var(--card-hover); color: var(--text); text-decoration: none; }
.admin-nav a.active { background: rgba(79, 140, 255, .15); color: var(--accent); font-weight: 600; }
.admin-card { background: var(--card); border: 1px solid var(--border); border-radius: var(--radius); padding: 20px; }
.admin-table { width: 100%; border-collapse: collapse; }
.admin-table th, .admin-table td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--border); font-size: 14px; vertical-align: middle; }
.admin-table th { color: var(--text-dim); font-weight: 500; white-space: nowrap; }
.admin-table tr:hover td { background: rgba(255,255,255,.02); }
.form-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 14px 18px; }
.form-item { display: flex; flex-direction: column; gap: 5px; }
.form-item.full { grid-column: 1 / -1; }
.form-item label { font-size: 13px; color: var(--text-dim); }
.form-item input, .form-item select, .form-item textarea {
  padding: 9px 12px; border-radius: 8px; border: 1px solid var(--border-strong);
  background: var(--bg); color: var(--text); outline: none; font-family: inherit; font-size: 14px;
}
.form-item input:focus, .form-item select:focus, .form-item textarea:focus { border-color: var(--accent); }
.form-item textarea { resize: vertical; min-height: 64px; }
.form-actions { display: flex; gap: 10px; margin-top: 20px; }
.spec-form-item { display: grid; grid-template-columns: 90px 1fr 1fr 70px 90px 90px 60px 40px; gap: 8px; align-items: center; margin-bottom: 8px; }
.spec-form-item input, .spec-form-item select { padding: 7px 9px; border-radius: 6px; border: 1px solid var(--border-strong); background: var(--bg); color: var(--text); font-size: 13px; outline: none; }
.group-block { border: 1px solid var(--border); border-radius: var(--radius); margin-bottom: 16px; overflow: hidden; }
.group-head { display: flex; align-items: center; justify-content: space-between; padding: 10px 14px; background: var(--bg-soft); }
.group-head h3 { margin: 0; font-size: 15px; }
.group-body { padding: 12px 14px; }
.spec-defs { width: 100%; border-collapse: collapse; margin-bottom: 10px; }
.spec-defs th, .spec-defs td { padding: 7px 9px; text-align: left; border-bottom: 1px solid var(--border); font-size: 13px; }
.spec-defs th { color: var(--text-dim); font-weight: 500; }
.toast {
  position: fixed; top: 20px; left: 50%; transform: translateX(-50%) translateY(-30px);
  padding: 10px 20px; border-radius: 10px; background: var(--card); border: 1px solid var(--border-strong);
  box-shadow: var(--shadow); opacity: 0; transition: all .25s; z-index: 100; font-size: 14px;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast.ok { border-color: var(--good); color: var(--good); }
.toast.err { border-color: var(--danger); color: var(--danger); }

/* ============ 响应式 ============ */
@media (max-width: 900px) {
  .header-inner { flex-wrap: wrap; height: auto; padding: 10px 0; gap: 10px; }
  .header-search { margin-left: 0; width: 100%; }
  .header-search input { flex: 1; width: auto; }
  .list-layout { grid-template-columns: 1fr; }
  .filter-card { position: static; }
  .product-hero { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .admin-layout { grid-template-columns: 1fr; }
  .admin-nav { position: static; }
  .spec-form-item { grid-template-columns: 1fr 1fr; }
}
/* 对比页视图开关 */
.compare-table.only-diff tr[data-diff="0"] { display: none; }
.compare-table.no-highlight td.diff { background: transparent; }
.compare-table.no-best td.best { color: inherit; font-weight: inherit; }
.compare-table.no-best td.best::after { content: none; }

/* ============ 主题系统（与其他工具一致） ============ */
body[data-theme="black"] { --bg:#05060a; --bg-soft:#0a0c12; --card:#0d0f16; --card-hover:#141824; --border:#1e2330; --border-strong:#2a3142; --text:#eef2f8; --text-dim:#8b93a7; --header-bg:rgba(5,6,10,.85); }
body[data-theme="white"] { --bg:#f6f8fa; --bg-soft:#ffffff; --card:#ffffff; --card-hover:#f0f3f6; --border:#d0d7de; --border-strong:#afb8c1; --text:#1f2328; --text-dim:#57606a; --header-bg:rgba(246,248,250,.88); }
body[data-theme="green"] { --bg:#e9f4ea; --bg-soft:#ffffff; --card:#ffffff; --card-hover:#e2f1e4; --border:#c8e0cc; --border-strong:#a8cbb0; --text:#1f3323; --text-dim:#5c6f60; --header-bg:rgba(233,244,234,.88); }
body[data-theme="gray"] { --bg:#26272b; --bg-soft:#2e2f34; --card:#33343a; --card-hover:#3b3c43; --border:#45464e; --border-strong:#55565f; --text:#eef0f3; --text-dim:#9a9da6; --header-bg:rgba(38,39,43,.85); }

.theme-picker { position: relative; margin-left: auto; }
.theme-trigger { display: inline-flex; align-items: center; gap: 8px; padding: 7px 12px; border-radius: 8px; border: 1px solid var(--border-strong); background: var(--card); color: var(--text); cursor: pointer; font-size: 13px; }
.theme-dot { width: 12px; height: 12px; border-radius: 50%; background: #05060a; border: 1px solid rgba(128,128,128,.5); }
.theme-arrow { font-size: 10px; color: var(--text-dim); }
.theme-menu { position: absolute; top: calc(100% + 6px); right: 0; background: var(--card); border: 1px solid var(--border-strong); border-radius: 10px; padding: 6px; display: none; z-index: 100; box-shadow: var(--shadow); min-width: 158px; }
.theme-option { display: flex; align-items: center; gap: 8px; width: 100%; padding: 8px 10px; border: none; background: none; color: var(--text); cursor: pointer; border-radius: 6px; font-size: 13px; text-align: left; }
.theme-option:hover { background: var(--card-hover); }
.theme-option .dot { width: 12px; height: 12px; border-radius: 50%; border: 1px solid rgba(128,128,128,.4); }
.dot-white { background: #f6f8fa; } .dot-black { background: #05060a; } .dot-green { background: #e9f4ea; } .dot-gray { background: #26272b; }

.back-home { display: inline-block; margin: 14px 0 0 18px; padding: 8px 16px; font-size: 13px; letter-spacing: 3px; color: inherit; text-decoration: none; background: rgba(128,128,128,.12); border: 1px solid currentColor; border-radius: 0; font-family: inherit; }
.back-home:hover { background: rgba(128,128,128,.24); }