/* AI 工具雷达 · 全站样式
   设计约束：零外部请求（无 webfont / 无 CDN 图标），单文件，首屏可秒开 */

:root {
  --bg: #f5f6fa;
  --surface: #ffffff;
  --surface-2: #f0f2f7;
  --border: #e6e9f0;
  --border-strong: #d6dae5;
  --text: #171a21;
  --muted: #6b7280;
  --muted-2: #9aa1af;
  --brand: #3355ff;
  --brand-hover: #2544e8;
  --brand-soft: #eef2ff;
  --green: #0f9960;
  --green-soft: #e7f7ef;
  --amber: #b45309;
  --amber-soft: #fef3c7;
  --red: #c2410c;
  --red-soft: #ffe8dc;
  --radius: 14px;
  --radius-sm: 9px;
  --shadow: 0 1px 2px rgba(20, 25, 40, .05), 0 6px 20px rgba(20, 25, 40, .05);
  --shadow-lg: 0 2px 6px rgba(20, 25, 40, .07), 0 16px 40px rgba(20, 25, 40, .09);
  --max: 1240px;
}

[data-theme="dark"] {
  --bg: #0d1017;
  --surface: #151922;
  --surface-2: #1c212c;
  --border: #262c39;
  --border-strong: #333b4c;
  --text: #e7eaf0;
  --muted: #98a1b2;
  --muted-2: #6f7889;
  --brand: #7d92ff;
  --brand-hover: #93a5ff;
  --brand-soft: #1c2340;
  --green: #34d399;
  --green-soft: #12291f;
  --amber: #fbbf24;
  --amber-soft: #2c2416;
  --red: #fb923c;
  --red-soft: #2e1d13;
  --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 6px 20px rgba(0, 0, 0, .25);
  --shadow-lg: 0 2px 6px rgba(0, 0, 0, .35), 0 16px 40px rgba(0, 0, 0, .35);
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "Source Han Sans SC", "Noto Sans CJK SC", "Segoe UI", Roboto, sans-serif;
  font-size: 15px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
button, input, select { font: inherit; color: inherit; }

.wrap { max-width: var(--max); margin: 0 auto; padding: 0 20px; }

/* ---------- 顶栏 ---------- */
.hdr {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 255, 255, .88);
  backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--border);
}
[data-theme="dark"] .hdr { background: rgba(21, 25, 34, .88); }

.hdr-in { display: flex; align-items: center; gap: 18px; height: 60px; }

.logo { display: flex; align-items: center; gap: 9px; font-weight: 700; font-size: 17px; letter-spacing: -.2px; flex-shrink: 0; }
.logo-mark {
  width: 30px; height: 30px; border-radius: 9px; flex-shrink: 0;
  background: linear-gradient(135deg, #3355ff, #7c3aed);
  color: #fff; display: grid; place-items: center;
  font-size: 14px; font-weight: 800; letter-spacing: -1px;
}

.nav { display: flex; gap: 4px; margin-right: auto; overflow-x: auto; scrollbar-width: none; }
.nav::-webkit-scrollbar { display: none; }
.nav a { padding: 7px 11px; border-radius: var(--radius-sm); color: var(--muted); font-size: 14px; white-space: nowrap; }
.nav a:hover { background: var(--surface-2); color: var(--text); }
.nav a.on { background: var(--brand-soft); color: var(--brand); font-weight: 600; }

.hdr-tools { display: flex; align-items: center; gap: 8px; flex-shrink: 0; }

.icon-btn {
  width: 34px; height: 34px; border-radius: var(--radius-sm); border: 1px solid var(--border);
  background: var(--surface); display: grid; place-items: center; cursor: pointer; padding: 0;
}
.icon-btn:hover { background: var(--surface-2); }
.icon-btn svg { width: 17px; height: 17px; stroke: var(--muted); }

/* ---------- Hero ---------- */
.hero { padding: 44px 0 26px; text-align: center; }
.hero h1 { margin: 0 0 10px; font-size: 34px; line-height: 1.25; letter-spacing: -1px; font-weight: 800; }
.hero p { margin: 0 auto 24px; color: var(--muted); font-size: 16px; max-width: 640px; }

.search {
  position: relative; max-width: 620px; margin: 0 auto;
}
.search svg { position: absolute; left: 15px; top: 50%; transform: translateY(-50%); width: 18px; height: 18px; stroke: var(--muted-2); pointer-events: none; }
.search input {
  width: 100%; height: 50px; padding: 0 15px 0 44px;
  border: 1px solid var(--border-strong); border-radius: 12px;
  background: var(--surface); outline: none; font-size: 15px;
  box-shadow: var(--shadow);
}
.search input:focus { border-color: var(--brand); box-shadow: 0 0 0 3px var(--brand-soft); }

.stats { display: flex; justify-content: center; gap: 28px; margin-top: 22px; color: var(--muted); font-size: 13px; }
.stats b { color: var(--text); font-size: 17px; font-weight: 700; }

/* ---------- 筛选条 ---------- */
.filters { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin: 8px 0 18px; }
.chip {
  padding: 6px 13px; border-radius: 999px; border: 1px solid var(--border);
  background: var(--surface); font-size: 13.5px; color: var(--muted); cursor: pointer;
  white-space: nowrap; transition: .15s;
}
.chip:hover { border-color: var(--border-strong); color: var(--text); }
.chip.on { background: var(--brand); border-color: var(--brand); color: #fff; font-weight: 600; }

.toolbar { display: flex; gap: 10px; flex-wrap: wrap; align-items: center; margin-bottom: 16px; }
.toolbar select {
  height: 36px; padding: 0 10px; border: 1px solid var(--border); border-radius: var(--radius-sm);
  background: var(--surface); cursor: pointer; font-size: 13.5px;
}
.count { color: var(--muted); font-size: 13px; margin-left: auto; }

/* ---------- 卡片网格 ---------- */
.grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(268px, 1fr)); gap: 14px; }

.card {
  position: relative; background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius); padding: 17px; display: flex; flex-direction: column; gap: 10px;
  transition: .16s;
}
.card:hover { border-color: var(--border-strong); box-shadow: var(--shadow-lg); transform: translateY(-2px); }

.card-top { display: flex; gap: 11px; align-items: flex-start; }
.avatar {
  width: 42px; height: 42px; border-radius: 11px; flex-shrink: 0;
  display: grid; place-items: center; color: #fff; font-weight: 700; font-size: 16px;
  letter-spacing: -1px; user-select: none;
}
.card-name { font-weight: 700; font-size: 15.5px; line-height: 1.35; display: flex; align-items: center; gap: 6px; flex-wrap: wrap; }
.card-cat { font-size: 12px; color: var(--muted-2); margin-top: 2px; }

.card-desc {
  font-size: 13.5px; color: var(--muted); line-height: 1.6; margin: 0;
  display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden;
}

.card-tags { display: flex; flex-wrap: wrap; gap: 5px; }
.tag { font-size: 11.5px; padding: 2px 7px; border-radius: 5px; background: var(--surface-2); color: var(--muted); }

.card-foot { display: flex; align-items: center; gap: 8px; margin-top: auto; padding-top: 4px; }

.badge { font-size: 11.5px; padding: 2px 8px; border-radius: 6px; font-weight: 600; white-space: nowrap; }
.badge.free { background: var(--green-soft); color: var(--green); }
.badge.freemium { background: var(--brand-soft); color: var(--brand); }
.badge.paid { background: var(--amber-soft); color: var(--amber); }
.badge.comm { background: var(--red-soft); color: var(--red); }

.rate { font-size: 12.5px; color: var(--amber); font-weight: 600; margin-left: auto; }

.go {
  display: inline-block; text-align: center; padding: 8px 14px; border-radius: var(--radius-sm);
  background: var(--brand); color: #fff; font-size: 13.5px; font-weight: 600; transition: .15s;
}
.go:hover { background: var(--brand-hover); }
.go.ghost { background: var(--surface-2); color: var(--text); }
.go.ghost:hover { background: var(--border); }

/* ---------- 区块标题 ---------- */
.sec { margin: 38px 0 0; }
.sec-head { display: flex; align-items: baseline; gap: 12px; margin-bottom: 16px; }
.sec-head h2 { margin: 0; font-size: 21px; letter-spacing: -.4px; font-weight: 750; }
.sec-head p { margin: 0; color: var(--muted); font-size: 13.5px; }
.sec-head a { margin-left: auto; color: var(--brand); font-size: 13.5px; white-space: nowrap; }

/* ---------- 详情页 ---------- */
.crumb { display: flex; gap: 6px; font-size: 13px; color: var(--muted-2); padding: 18px 0 0; flex-wrap: wrap; }
.crumb a:hover { color: var(--brand); }

.detail { display: grid; grid-template-columns: 1fr 300px; gap: 22px; align-items: start; margin: 18px 0 44px; }

.panel { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 22px; }
.panel + .panel { margin-top: 16px; }
.panel h3 { margin: 0 0 12px; font-size: 16px; }

.detail-head { display: flex; gap: 16px; align-items: flex-start; margin-bottom: 6px; }
.detail-head .avatar { width: 60px; height: 60px; border-radius: 15px; font-size: 22px; }
.detail-head h1 { margin: 0 0 6px; font-size: 26px; letter-spacing: -.6px; }

.pros-cons { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.pc-list { margin: 0; padding: 0; list-style: none; }
.pc-list li { position: relative; padding-left: 20px; font-size: 14px; margin-bottom: 8px; color: var(--muted); }
.pc-list li::before { position: absolute; left: 0; font-weight: 700; }
.pc-list.pro li::before { content: "＋"; color: var(--green); }
.pc-list.con li::before { content: "－"; color: var(--amber); }

.side { position: sticky; top: 78px; display: flex; flex-direction: column; gap: 14px; }
.side .go { display: block; padding: 12px; font-size: 15px; }
.meta-row { display: flex; justify-content: space-between; gap: 12px; font-size: 13.5px; padding: 7px 0; border-bottom: 1px dashed var(--border); }
.meta-row:last-child { border: 0; }
.meta-row span { color: var(--muted); }

/* ---------- 分类卡 ---------- */
.cat-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: 14px; }
.cat-card {
  background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 18px; display: flex; gap: 13px; transition: .16s;
}
.cat-card:hover { border-color: var(--brand); box-shadow: var(--shadow); transform: translateY(-2px); }
.cat-ico { width: 40px; height: 40px; border-radius: 11px; background: var(--brand-soft); display: grid; place-items: center; flex-shrink: 0; }
.cat-ico svg { width: 20px; height: 20px; stroke: var(--brand); }
.cat-card h3 { margin: 0 0 3px; font-size: 15.5px; }
.cat-card p { margin: 0 0 6px; font-size: 13px; color: var(--muted); }
.cat-card .n { font-size: 12.5px; color: var(--muted-2); }

/* ---------- 内容页 ---------- */
.prose { max-width: 780px; }
.prose h1 { font-size: 28px; letter-spacing: -.6px; margin: 0 0 6px; }
.prose h2 { font-size: 19px; margin: 26px 0 10px; }
.prose p, .prose li { color: var(--muted); font-size: 14.5px; }
.prose ul { padding-left: 20px; }

/* ---------- 广告位 ---------- */
.ad { margin: 16px 0; }
.ad-label { font-size: 11px; color: var(--muted-2); text-align: center; margin-bottom: 4px; letter-spacing: 1px; }

/* ---------- 页脚 ---------- */
.ftr { border-top: 1px solid var(--border); margin-top: 56px; padding: 34px 0 40px; background: var(--surface); }
.ftr-grid { display: grid; grid-template-columns: 1.6fr 1fr 1fr; gap: 30px; }
.ftr h4 { margin: 0 0 10px; font-size: 14px; }
.ftr p, .ftr a { font-size: 13.5px; color: var(--muted); }
.ftr ul { margin: 0; padding: 0; list-style: none; }
.ftr li { margin-bottom: 7px; }
.ftr a:hover { color: var(--brand); }
.ftr-bot { margin-top: 26px; padding-top: 18px; border-top: 1px solid var(--border); font-size: 12.5px; color: var(--muted-2); display: flex; gap: 14px; flex-wrap: wrap; }

/* ---------- 空状态 ---------- */
.empty { text-align: center; padding: 60px 20px; color: var(--muted); }
.empty b { display: block; font-size: 17px; color: var(--text); margin-bottom: 6px; }

/* ---------- 响应式 ---------- */
@media (max-width: 900px) {
  .detail { grid-template-columns: 1fr; }
  .side { position: static; }
  .ftr-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .hero { padding: 30px 0 20px; }
  .hero h1 { font-size: 26px; }
  .hero p { font-size: 14.5px; }
  .stats { gap: 18px; }
  .grid { grid-template-columns: 1fr; }
  .pros-cons, .ftr-grid { grid-template-columns: 1fr; }
  .nav { display: none; }
  .hdr-in { height: 54px; }
  .detail-head h1 { font-size: 21px; }
}