/* TJ 内容飞轮 · 线1 AI导航 — 深空蓝 + 霓虹青 科技雷达风 */
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;scroll-padding-top:78px}
body{background:var(--bg);color:var(--text);
  font-family:"Space Grotesk",-apple-system,"Segoe UI",system-ui,"PingFang SC","Microsoft YaHei",sans-serif;
  line-height:1.6;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img{max-width:100%}
.muted{color:var(--muted)}
::selection{background:var(--primary);color:#04121a}

/* ---------- nav ---------- */
.nav{position:sticky;top:0;z-index:50;background:rgba(8,12,24,.95);border-bottom:1px solid var(--line)}
.nav-in{max-width:1180px;margin:0 auto;padding:14px 22px;display:flex;align-items:center;gap:20px}
.brand{display:flex;align-items:center;gap:10px;font-weight:700;font-size:18px}
.brand-mark{width:26px;height:26px;border-radius:7px;flex:none;
  background:radial-gradient(circle at 30% 30%,var(--primary2),var(--accent));
  box-shadow:0 0 16px rgba(0,229,204,.55);position:relative}
.brand-mark::after{content:"";position:absolute;inset:6px;border-radius:50%;border:2px solid rgba(7,11,22,.85)}
.brand-name{background:linear-gradient(90deg,var(--primary),var(--accent));-webkit-background-clip:text;background-clip:text;color:transparent}
.nav-links{display:flex;gap:22px;margin-left:8px;font-size:14.5px;color:var(--muted)}
.nav-links a:hover{color:var(--primary)}
.lang-switch{margin-left:auto;display:flex;gap:4px;background:var(--bg2);border:1px solid var(--line);border-radius:999px;padding:3px}
.lang-btn{background:none;border:0;color:var(--muted);font:inherit;font-size:13px;padding:5px 11px;border-radius:999px;cursor:pointer;transition:.2s}
.lang-btn.active{background:linear-gradient(90deg,var(--primary),var(--accent));color:#04121a;font-weight:600}

/* ---------- hero ---------- */
.hero{position:relative;overflow:hidden;text-align:center;padding:92px 22px 76px;border-bottom:1px solid var(--line)}
.hero-bg{position:absolute;inset:0;pointer-events:none;
  background:linear-gradient(180deg,rgba(7,11,22,.5) 0%,rgba(7,11,22,.72) 58%,var(--bg) 100%),url(/assets/img/hero-bg.jpg) center/cover no-repeat}
.hero-grid{display:none}
.hero-inner{position:relative;max-width:820px;margin:0 auto}
.badge{display:inline-block;font-size:13px;letter-spacing:.04em;color:var(--primary);
  border:1px solid rgba(0,229,204,.4);border-radius:999px;padding:6px 14px;margin-bottom:22px;background:rgba(0,229,204,.06)}
.hero-title{font-size:clamp(38px,7vw,68px);line-height:1.05;font-weight:700;letter-spacing:-.02em;
  background:linear-gradient(180deg,#fff,#9fb4d8);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{margin:20px auto 0;max-width:620px;font-size:clamp(15px,2.4vw,19px);color:var(--muted)}
.hero-cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin-top:32px}
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 26px;border-radius:12px;font-weight:600;font-size:15px;cursor:pointer;transition:.22s;border:1px solid transparent}
.btn-primary{background:linear-gradient(90deg,var(--primary),var(--primary2));color:#04121a;box-shadow:0 8px 30px rgba(0,229,204,.32)}
.btn-primary:hover{transform:translateY(-2px);box-shadow:0 12px 38px rgba(0,229,204,.5)}
.btn-ghost{border-color:var(--line);color:var(--text);background:var(--card)}
.btn-ghost:hover{border-color:var(--primary);color:var(--primary)}
.hero-stats{display:flex;gap:14px;justify-content:center;margin-top:46px;flex-wrap:wrap}
.hero-stats>div{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:16px 26px;min-width:120px}
.hero-stats b{display:block;font-size:30px;background:linear-gradient(90deg,var(--primary),var(--accent));-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-stats span{font-size:13px;color:var(--muted)}

/* ---------- section ---------- */
main{max-width:1180px;margin:0 auto;padding:0 22px}
.sec{padding:64px 0 12px}
.sec>h2,.funnel>h2{font-size:clamp(24px,4vw,34px);font-weight:700;letter-spacing:-.01em;text-align:center}
.sec .sub,.funnel .sub{text-align:center;color:var(--muted);margin:8px 0 30px;font-size:15px}

/* ---------- 热度榜 ---------- */
.hot-list{display:flex;flex-direction:column;gap:8px;max-width:840px;margin:0 auto}
.hot-row{display:grid;grid-template-columns:46px 1fr 160px 56px;align-items:center;gap:14px;
  background:var(--card);border:1px solid var(--line);border-radius:14px;padding:12px 16px;transition:.2s}
.hot-row:hover{border-color:var(--primary);transform:translateX(4px);background:var(--card2)}
.hot-rank{font-size:20px;font-weight:700;color:var(--muted);text-align:center}
.rank-1 .hot-rank{color:#ffd76a}.rank-2 .hot-rank{color:#cfe0ff}.rank-3 .hot-rank{color:#ffb27a}
.rank-1{border-color:rgba(255,215,106,.4)}.rank-2{border-color:rgba(207,224,255,.3)}.rank-3{border-color:rgba(255,178,122,.3)}
.hot-info{display:flex;flex-direction:column;min-width:0}
.hot-name{font-weight:600;font-size:16px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.hot-cat{font-size:12.5px;color:var(--muted)}
.hot-bar{height:8px;background:var(--bg2);border-radius:999px;overflow:hidden}
.hot-bar i{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,var(--accent),var(--primary));box-shadow:0 0 10px rgba(0,229,204,.5)}
.hot-num{font-weight:700;font-size:18px;text-align:right;color:var(--primary)}

/* ---------- 分类 ---------- */
.catgrid{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:12px}
.catcard{display:flex;flex-direction:column;align-items:center;gap:6px;text-align:center;
  background:var(--card);border:1px solid var(--line);border-radius:16px;padding:22px 12px;transition:.22s}
.catcard:hover{border-color:var(--primary);transform:translateY(-3px);box-shadow:0 12px 30px rgba(0,0,0,.4)}
.catcard-ic{font-size:30px}
.catcard-name{font-weight:600;font-size:15px}
.catcard-n{font-size:12.5px;color:var(--muted)}

/* ---------- 筛选 ---------- */
.filterbar{display:flex;justify-content:center;margin-bottom:16px}
.search{width:min(440px,100%);background:var(--card);border:1px solid var(--line);border-radius:12px;
  color:var(--text);font:inherit;font-size:15px;padding:12px 18px}
.search:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(0,229,204,.15)}
.chips{display:flex;flex-wrap:wrap;gap:8px;justify-content:center;margin-bottom:26px}
.chip{background:var(--card);border:1px solid var(--line);color:var(--muted);font:inherit;font-size:13.5px;
  padding:7px 14px;border-radius:999px;cursor:pointer;transition:.18s;display:inline-flex;align-items:center;gap:6px}
.chip i{font-style:normal;font-size:11px;opacity:.7;background:var(--bg2);padding:1px 6px;border-radius:999px}
.chip:hover{color:var(--text);border-color:var(--primary)}
.chip.active{background:linear-gradient(90deg,var(--primary),var(--accent));color:#04121a;font-weight:600;border-color:transparent}
.chip.active i{background:rgba(0,0,0,.18)}

/* ---------- 工具卡片 ---------- */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(258px,1fr));gap:16px}
.card{display:flex;flex-direction:column;background:var(--card);border:1px solid var(--line);border-radius:16px;padding:18px;transition:transform .2s,border-color .2s,box-shadow .2s;position:relative}
.card:hover{transform:translateY(-4px);border-color:var(--primary);box-shadow:0 12px 30px rgba(0,0,0,.45),0 0 22px rgba(0,229,204,.14)}
.card-top{display:flex;justify-content:space-between;align-items:center;gap:8px;margin-bottom:10px}
.cat-tag{font-size:12px;color:var(--primary);background:rgba(0,229,204,.08);border:1px solid rgba(0,229,204,.22);padding:3px 9px;border-radius:999px;white-space:nowrap}
.lic{font-size:11.5px;padding:2px 8px;border-radius:999px;white-space:nowrap}
.lic-open{color:#7bffd0;background:rgba(0,229,150,.1)}
.lic-closed{color:#9fb4d8;background:rgba(124,92,255,.12)}
.lic-unknown{color:var(--muted);background:var(--bg2)}
.card-name{font-size:18px;font-weight:600;margin-bottom:6px}
.card-desc{font-size:13.5px;color:var(--muted);flex:1;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden}
.card-foot{display:flex;align-items:center;gap:10px;margin-top:14px}
.heat{display:flex;align-items:center;gap:4px;font-size:13px;font-weight:600;color:var(--hot);white-space:nowrap}
.flame{filter:drop-shadow(0 0 4px rgba(255,107,74,.6))}
.heat-bar{flex:1;height:6px;background:var(--bg2);border-radius:999px;overflow:hidden}
.heat-bar i{display:block;height:100%;background:linear-gradient(90deg,var(--hot),var(--primary));border-radius:999px}
.empty{text-align:center;color:var(--muted);padding:40px}

/* ---------- 详情页 ---------- */
.detail{padding-top:30px}
.back{display:inline-block;color:var(--muted);font-size:14px;margin:14px 0 22px}
.back:hover{color:var(--primary)}
.tool-hero{display:flex;gap:22px;align-items:flex-start;background:var(--card);border:1px solid var(--line);border-radius:20px;padding:30px}
.th-ic{font-size:54px;flex:none;width:90px;height:90px;display:grid;place-items:center;border-radius:18px;background:var(--bg2);border:1px solid var(--line)}
.th-main h1{font-size:clamp(26px,5vw,40px);margin:10px 0 4px}
.aliases{color:var(--muted);font-size:14px;margin-bottom:8px}
.th-desc{font-size:16px;color:#c4d2ee;margin-top:8px}
.tool-meta{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:14px;margin:18px 0}
.meta-box{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:16px 18px;display:flex;flex-direction:column;gap:8px}
.meta-box .ml{font-size:12.5px;color:var(--muted)}
.meta-box .mv{font-size:18px;font-weight:600}
.src-link{color:var(--primary);font-size:14px;word-break:break-all}
.src-none{color:var(--muted);font-size:14px}
.intel-note{text-align:center;color:var(--muted);font-size:13px;margin:6px 0 8px;opacity:.85}

/* ---------- 漏斗导流 ---------- */
.funnel{padding:70px 0 40px}
.funnel-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px;max-width:1000px;margin:0 auto}
.funnel-card{background:linear-gradient(160deg,var(--card2),var(--card));border:1px solid var(--line);border-radius:18px;padding:24px;transition:.22s;position:relative;overflow:hidden}
.funnel-card:hover{transform:translateY(-4px);border-color:var(--primary);box-shadow:0 16px 40px rgba(0,0,0,.45)}
.fc-ic{width:46px;height:46px;border-radius:12px;margin-bottom:14px;background:linear-gradient(135deg,var(--primary),var(--accent));box-shadow:0 6px 18px rgba(0,229,204,.3);position:relative}
.fc-ic::after{content:"";position:absolute;inset:11px;border:2.5px solid rgba(7,11,22,.9);border-radius:6px}
.fc-ic-geo::after{border-radius:50%}
.fc-ic-relay::after{clip-path:polygon(45% 0,100% 0,55% 45%,100% 45%,20% 100%,45% 55%,0 55%)}
.funnel-card h3{font-size:17px;margin-bottom:8px}
.funnel-card p{font-size:13.5px;color:var(--muted);min-height:42px}
.fc-go{display:inline-block;margin-top:12px;color:var(--primary);font-size:14px;font-weight:600}

/* ---------- footer ---------- */
.foot{border-top:1px solid var(--line);margin-top:60px;padding:46px 22px;text-align:center;color:var(--muted)}
.foot-tag{font-size:20px;font-weight:700;color:var(--text);background:linear-gradient(90deg,var(--primary),var(--accent));-webkit-background-clip:text;background-clip:text;color:transparent;margin-bottom:14px}
.foot-data,.foot-dis{font-size:13px;max-width:680px;margin:6px auto;opacity:.85}
.foot-built{font-size:12.5px;margin-top:16px;opacity:.6}

/* ---------- reveal 动画(渐进增强:默认可见,有JS才隐藏后淡入,防内容永久隐藏) ---------- */
.reveal{transition:opacity .6s ease,transform .6s ease}
html.js .reveal{opacity:0;transform:translateY(22px)}
html.js .reveal.in{opacity:1;transform:none}
@media(prefers-reduced-motion:reduce){
  html.js .reveal{opacity:1;transform:none;transition:none}
}

/* ---------- 响应式 ---------- */
@media(max-width:680px){
  .nav-links{display:none}
  .hot-row{grid-template-columns:38px 1fr 70px;gap:10px}
  .hot-bar{display:none}
  .tool-hero{flex-direction:column;align-items:center;text-align:center;padding:24px}
  .hero{padding:64px 18px 56px}
}