*{box-sizing:border-box;margin:0;padding:0}
html,body{overflow-x:hidden;-webkit-text-size-adjust:100%}
img,video{max-width:100%;height:auto}
.stage .content,.channel .ckw,.debate-box{word-break:break-word;overflow-wrap:anywhere}
:root{
--bg:#0b1020; --bg2:#0f1530; --fg:#e7ecff; --muted:#8a93b8;
--brand:#5b8cff; --brand2:#8b5cf6; --ok:#22c55e; --warn:#f59e0b; --bad:#ef4444;
--card:rgba(255,255,255,.04); --line:rgba(255,255,255,.08);
}
html,body{background:var(--bg);color:var(--fg);font:15px/1.7 -apple-system,"PingFang SC","Microsoft YaHei",system-ui,sans-serif}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{letter-spacing:.5px}
section{padding:80px 24px;max-width:1180px;margin:0 auto}
.muted{color:var(--muted)}
.center{text-align:center}
.hidden{display:none}
/* nav */
.nav{position:sticky;top:0;z-index:50;display:flex;justify-content:space-between;align-items:center;
padding:14px 28px;backdrop-filter:blur(14px);background:rgba(11,16,32,.6);border-bottom:1px solid var(--line)}
.brand{font-weight:700;font-size:18px;display:flex;align-items:center;gap:8px}
.brand em{font-style:normal;color:var(--muted);font-weight:500;font-size:13px}
.nav nav a{margin-left:18px;color:var(--muted);font-size:14px}
.nav nav a:hover{color:var(--fg)}
/* buttons */
.btn-primary{background:linear-gradient(135deg,var(--brand),var(--brand2));color:#fff;padding:12px 22px;border-radius:10px;
border:0;font-weight:600;cursor:pointer;display:inline-block;box-shadow:0 8px 30px rgba(91,140,255,.35)}
.btn-primary.big{padding:14px 28px;font-size:15px}
.btn-primary:hover{filter:brightness(1.1)}
.btn-ghost{background:transparent;color:var(--fg);border:1px solid var(--line);padding:11px 20px;border-radius:10px;cursor:pointer}
.btn-ghost:hover{background:var(--card)}
/* hero */
.hero{position:relative;overflow:hidden;padding:120px 24px 90px;text-align:center}
.hero-bg{position:absolute;inset:0;z-index:-1;
background:
radial-gradient(800px 400px at 20% 10%, rgba(91,140,255,.25), transparent 60%),
radial-gradient(600px 380px at 80% 30%, rgba(139,92,246,.25), transparent 60%);
}
.badge{display:inline-block;padding:6px 14px;border:1px solid var(--line);border-radius:999px;color:var(--muted);font-size:13px;margin-bottom:24px;background:var(--card)}
.hero h1{font-size:54px;line-height:1.2;margin-bottom:18px}
.grad{background:linear-gradient(90deg,#7aa2ff,#c084fc,#22d3ee);-webkit-background-clip:text;background-clip:text;color:transparent}
.lead{font-size:18px;color:var(--muted);max-width:680px;margin:0 auto 32px}
.lead b{color:var(--fg)}
.cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.kpis{list-style:none;display:flex;gap:48px;justify-content:center;margin-top:60px;flex-wrap:wrap}
.kpis li{text-align:center}
.kpis b{display:block;font-size:30px;background:linear-gradient(90deg,#7aa2ff,#c084fc);-webkit-background-clip:text;color:transparent}
.kpis span{color:var(--muted);font-size:13px}
/* tool card */
.card{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:28px;backdrop-filter:blur(8px)}
.card-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:18px;flex-wrap:wrap;gap:12px}
.card-head h2{font-size:20px}
.tabs{display:flex;gap:6px;background:rgba(255,255,255,.04);padding:4px;border-radius:10px}
.tab{background:transparent;border:0;color:var(--muted);padding:8px 16px;border-radius:8px;cursor:pointer;font-size:13px}
.tab.active{background:var(--brand);color:#fff}
textarea{width:100%;background:rgba(0,0,0,.25);border:1px solid var(--line);color:var(--fg);
border-radius:12px;padding:16px;font-size:15px;resize:vertical;font-family:inherit;outline:none}
textarea:focus{border-color:var(--brand)}
.row{display:flex;justify-content:space-between;align-items:center;margin-top:16px;flex-wrap:wrap;gap:14px}
.left{display:flex;align-items:center;gap:14px;flex-wrap:wrap;color:var(--muted);font-size:14px}
select,.chk input{background:rgba(0,0,0,.3);color:var(--fg);border:1px solid var(--line);
padding:8px 12px;border-radius:8px;font-size:13px;outline:none}
.chk{display:flex;align-items:center;gap:6px;cursor:pointer}
/* media */
.media-pane{margin-top:4px}
.drop-zone{display:flex;flex-direction:column;align-items:center;justify-content:center;
border:2px dashed var(--line);border-radius:14px;padding:40px 20px;cursor:pointer;
background:rgba(0,0,0,.2);transition:.2s;text-align:center}
.drop-zone:hover,.drop-zone.drag{border-color:var(--brand);background:rgba(91,140,255,.06)}
.dz-icon{font-size:34px;margin-bottom:8px}
.dz-title{font-size:15px;margin-bottom:4px}
.dz-hint{color:var(--muted);font-size:12px}
.preview{margin-top:14px;padding:14px;background:rgba(0,0,0,.25);border:1px solid var(--line);border-radius:12px}
.preview img,.preview video{max-width:100%;max-height:320px;border-radius:8px;display:block;margin:0 auto}
.preview .meta{margin-top:8px;color:var(--muted);font-size:13px;text-align:center}
.frames{display:grid;grid-template-columns:repeat(6,1fr);gap:6px;margin-top:10px}
.frames img{width:100%;border-radius:4px}
#mediaNote{width:100%;margin-top:12px;background:rgba(0,0,0,.25);border:1px solid var(--line);
color:var(--fg);border-radius:10px;padding:10px 12px;font-family:inherit;outline:none;resize:vertical}
#mediaNote:focus{border-color:var(--brand)}
/* ================ multi-agent pipeline UI ================ */
.pipeline{margin-top:8px}
.stage{display:flex;gap:14px;padding:16px 18px;border-radius:14px;margin-bottom:10px;
background:rgba(0,0,0,.25);border:1px solid var(--line);opacity:.35;transition:.4s}
.stage.active{opacity:1;border-color:var(--brand);box-shadow:0 0 0 3px rgba(91,140,255,.12)}
.stage.done{opacity:1}
.stage .avatar{width:44px;height:44px;border-radius:50%;display:grid;place-items:center;font-size:22px;flex-shrink:0;
background:linear-gradient(135deg,#334,#445);box-shadow:0 4px 12px rgba(0,0,0,.3)}
.stage.red .avatar{background:linear-gradient(135deg,#ef4444,#b91c1c)}
.stage.blue .avatar{background:linear-gradient(135deg,#3b82f6,#1d4ed8)}
.stage.search .avatar{background:linear-gradient(135deg,#06b6d4,#0e7490)}
.stage.judge .avatar{background:linear-gradient(135deg,#a855f7,#7e22ce)}
.stage.official .avatar{background:linear-gradient(135deg,#22c55e,#15803d)}
.stage .body{flex:1;min-width:0}
.stage .role{font-weight:700;font-size:14px;display:flex;align-items:center;gap:8px;margin-bottom:4px}
.stage .role .state{font-size:11px;padding:2px 8px;border-radius:99px;background:rgba(91,140,255,.18);color:#8ab6ff;font-weight:500}
.stage.done .state{background:rgba(34,197,94,.15);color:#86efac}
.stage .content{color:var(--fg);font-size:14px;line-height:1.75}
.stage .content ul{padding-left:20px;margin-top:6px}
.stage .content li{margin:4px 0}
.stage .typing{display:inline-flex;gap:4px;align-items:center;color:var(--muted);font-size:13px}
.typing i{width:6px;height:6px;border-radius:50%;background:var(--brand);animation:bounce 1.2s infinite}
.typing i:nth-child(2){animation-delay:.15s}.typing i:nth-child(3){animation-delay:.3s}
@keyframes bounce{0%,80%,100%{transform:translateY(0);opacity:.4}40%{transform:translateY(-5px);opacity:1}}
/* verdict final */
.final-verdict{margin-top:14px;padding:22px;border-radius:14px;
background:linear-gradient(135deg,rgba(168,85,247,.12),rgba(91,140,255,.12));
border:1px solid rgba(168,85,247,.35)}
.final-verdict .score-bar{margin-bottom:14px}
.debate-box{margin-top:10px;padding:12px 14px;border-left:3px solid var(--line);background:rgba(255,255,255,.02);border-radius:6px;font-size:14px;color:var(--muted)}
.debate-box b{color:var(--fg)}
/* official channels */
.channels{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:10px;margin-top:10px}
.channel{display:block;padding:12px 14px;border-radius:10px;border:1px solid var(--line);
background:rgba(255,255,255,.03);transition:.2s;text-decoration:none;color:inherit}
.channel:hover{border-color:var(--brand);background:rgba(91,140,255,.08);transform:translateY(-2px)}
.channel .cname{font-weight:600;font-size:14px;margin-bottom:4px;display:flex;align-items:center;gap:6px}
.channel .ckw{color:var(--muted);font-size:12px;word-break:break-all}
.channel .go{color:var(--brand);font-size:12px;margin-top:6px;display:block}
/* progress */
.progress-head{display:flex;justify-content:space-between;align-items:center;margin-bottom:14px}
.progress-head h3{font-size:16px}
.progress-dots{display:flex;gap:6px}
.progress-dots i{width:8px;height:8px;border-radius:50%;background:var(--line);transition:.3s}
.progress-dots i.on{background:var(--brand);box-shadow:0 0 8px var(--brand)}
.progress-dots i.done{background:#22c55e}
/* result */
.result{margin-top:24px;background:rgba(0,0,0,.3);border:1px solid var(--line);border-radius:14px;padding:22px;animation:fade .4s ease}
@keyframes fade{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}
.score-bar{display:flex;align-items:center;gap:18px;margin-bottom:18px}
.score-circle{width:90px;height:90px;border-radius:50%;display:grid;place-items:center;font-size:26px;font-weight:700;color:#fff;flex-shrink:0}
.verdict{font-size:18px;font-weight:600;margin-bottom:4px}
.tagline{color:var(--muted);font-size:14px}
.section-block{margin-top:18px}
.section-block h4{font-size:14px;color:var(--muted);margin-bottom:8px;text-transform:uppercase;letter-spacing:1px}
.section-block ul{padding-left:20px}
.section-block li{margin:6px 0}
.loading{display:flex;align-items:center;gap:10px;color:var(--muted)}
.spinner{width:18px;height:18px;border:2px solid var(--line);border-top-color:var(--brand);border-radius:50%;animation:spin .9s linear infinite}
@keyframes spin{to{transform:rotate(360deg)}}
/* settings */
.settings{margin-top:22px;padding:14px 18px;background:rgba(0,0,0,.2);border:1px solid var(--line);border-radius:12px}
.settings summary{cursor:pointer;color:var(--muted);font-size:14px}
.settings input{margin-top:10px;width:60%;min-width:260px;background:rgba(0,0,0,.3);border:1px solid var(--line);color:var(--fg);
padding:10px 12px;border-radius:8px;outline:none;font-family:inherit}
.settings p{margin:10px 0;font-size:13px;color:var(--muted)}
.settings a{color:var(--brand);text-decoration:underline}
#keyState{margin-left:10px;font-size:13px}
/* cases */
.cases h2{font-size:28px;text-align:center;margin-bottom:8px}
.case-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:18px;margin-top:30px}
.case{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:22px;cursor:pointer;transition:.2s;position:relative}
.case:hover{transform:translateY(-3px);border-color:var(--brand);box-shadow:0 14px 40px rgba(91,140,255,.18)}
.case h3{margin:10px 0 6px;font-size:16px}
.case p{color:var(--muted);font-size:13px}
.tag{position:absolute;top:14px;right:14px;font-size:11px;padding:4px 10px;border-radius:999px;font-weight:600}
.tag.bad{background:rgba(239,68,68,.15);color:#fca5a5;border:1px solid rgba(239,68,68,.4)}
.tag.warn{background:rgba(245,158,11,.15);color:#fcd34d;border:1px solid rgba(245,158,11,.4)}
.tag.ok{background:rgba(34,197,94,.15);color:#86efac;border:1px solid rgba(34,197,94,.4)}
/* how */
.how h2{text-align:center;font-size:28px;margin-bottom:36px}
.how-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:18px}
.how-grid > div{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:24px;text-align:center}
.num{width:42px;height:42px;border-radius:50%;background:linear-gradient(135deg,var(--brand),var(--brand2));
color:#fff;display:grid;place-items:center;font-weight:700;margin:0 auto 14px}
.how-grid h4{margin-bottom:6px}
.how-grid p{color:var(--muted);font-size:14px}
/* faq */
.faq h2{text-align:center;font-size:28px;margin-bottom:24px}
.faq details{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:16px 20px;margin-bottom:10px}
.faq summary{cursor:pointer;font-weight:600}
.faq p{margin-top:10px;color:var(--muted)}
/* footer */
footer{padding:40px 24px;text-align:center;border-top:1px solid var(--line);color:var(--muted);font-size:13px}
footer p{margin:4px 0}
@media (max-width:768px){
section{padding:48px 16px}
.nav{padding:12px 16px}
.brand{font-size:16px}
.brand em{display:none}
.hero{padding:64px 16px 48px}
.hero h1{font-size:32px;line-height:1.25}
.lead{font-size:15px}
.badge{font-size:12px;padding:5px 12px;margin-bottom:18px}
.cta{flex-direction:column;align-items:stretch}
.cta .btn-primary,.cta .btn-ghost{text-align:center}
.kpis{gap:20px;margin-top:36px}
.kpis li{flex:1;min-width:80px}
.kpis b{font-size:22px}
.nav nav{display:flex;align-items:center}
.nav nav a{margin-left:8px;font-size:12px}
.nav nav a:not(.btn-ghost){display:none}
.card{padding:18px;border-radius:14px}
.card-head h2{font-size:18px}
.tabs{width:100%;overflow-x:auto;-webkit-overflow-scrolling:touch}
.tab{flex-shrink:0;padding:7px 12px;font-size:12px}
textarea{font-size:14px;padding:12px}
.row{flex-direction:column;align-items:stretch}
.left{justify-content:flex-start;font-size:13px}
.row > .btn-primary{width:100%;text-align:center}
.drop-zone{padding:28px 14px}
.dz-icon{font-size:28px}
.preview img,.preview video{max-height:240px}
.frames{grid-template-columns:repeat(3,1fr)}
.stage{padding:12px 14px;gap:10px;border-radius:12px}
.stage .avatar{width:36px;height:36px;font-size:18px}
.stage .role{font-size:13px;flex-wrap:wrap}
.stage .content{font-size:13px;line-height:1.7}
.final-verdict{padding:16px;border-radius:12px}
.score-bar{flex-direction:column;align-items:flex-start;gap:12px}
.score-circle{width:72px;height:72px;font-size:22px}
.channels{grid-template-columns:1fr;gap:8px}
.channel{padding:10px 12px}
.settings{padding:12px 14px}
.settings input{width:100%;min-width:0}
.cases h2,.how h2,.faq h2{font-size:22px}
.case-grid,.how-grid{grid-template-columns:1fr;gap:12px}
.case,.how-grid > div{padding:18px}
.progress-head h3{font-size:14px}
.result{padding:16px}
}
@media (max-width:380px){
.hero h1{font-size:26px}
.frames{grid-template-columns:repeat(2,1fr)}
.kpis{gap:14px}
.kpis b{font-size:20px}
}