:root{
  --bg:#0b0b0c;--bg2:#111113;--card:#17171a;--line:#26262b;--text:#f2f2f0;--mute:#9b9ba3;--dim:#6b6b73;
  --acc:#d8ff5c;--acc-ink:#0b0b0c;--ship:#4ade80;--minor:#fbbf24;--fail:#f87171;
  --r:16px;--maxw:1160px;
  --serif:"Instrument Serif",Georgia,serif;--sans:Inter,-apple-system,"PingFang SC","Helvetica Neue",sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:70px}
body{margin:0;background:var(--bg);color:var(--text);font:15px/1.6 var(--sans);-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:inherit;text-decoration:none}
img,video{display:block;max-width:100%}
button{font:inherit;cursor:pointer;color:inherit}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 20px}
.center{text-align:center;margin-top:28px}
.dim{color:var(--dim)}

/* nav */
.nav{position:sticky;top:0;z-index:50;background:rgba(11,11,12,.82);backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}
.nav .wrap{display:flex;align-items:center;gap:26px;height:60px}
.logo{display:flex;align-items:center;gap:8px;font-weight:700;letter-spacing:-.02em;font-size:18px}
.logo.sm{font-size:15px}
.logo i{width:22px;height:22px;border-radius:6px;background:var(--acc);display:inline-block;position:relative;flex:none}
.logo i::after{content:"";position:absolute;left:8px;top:6px;border-left:8px solid var(--acc-ink);border-top:5px solid transparent;border-bottom:5px solid transparent}
.nav nav{display:flex;gap:22px;color:var(--mute);font-size:14px}
.nav nav a:hover{color:var(--text)}
.nav .sp{flex:1}
.lang{background:none;border:1px solid var(--line);color:var(--mute);border-radius:99px;padding:4px 11px;font-size:13px;white-space:nowrap}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border:0;border-radius:99px;padding:12px 22px;font-weight:600;font-size:14.5px;transition:transform .15s,background .15s;white-space:nowrap}
.btn:hover{transform:translateY(-1px)}
.btn.pri{background:var(--acc);color:var(--acc-ink)}
.btn.sec{background:transparent;color:var(--text);border:1px solid #33333a}
.btn.sec:hover{border-color:#55555c}
.btn.sm{padding:7px 14px;font-size:13px}
.btn.block{width:100%}

/* hero */
.hero{padding:64px 0 56px;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;right:-240px;top:-260px;width:760px;height:760px;background:radial-gradient(circle,rgba(216,255,92,.11),transparent 60%);pointer-events:none}
.hero .wrap{display:grid;grid-template-columns:1fr 1.08fr;gap:52px;align-items:center}
.eyebrow{display:inline-flex;gap:8px;align-items:center;font-size:12.5px;color:var(--mute);border:1px solid var(--line);padding:5px 12px;border-radius:99px;margin-bottom:22px}
.eyebrow b{width:7px;height:7px;border-radius:50%;background:var(--ship);box-shadow:0 0 10px var(--ship)}
h1{font-family:var(--serif);font-weight:400;font-size:clamp(42px,5.4vw,70px);line-height:1;letter-spacing:-.02em;margin:0 0 20px}
h1 em{font-style:italic;color:var(--acc)}
.lead{font-size:18px;color:#c9c9cf;max-width:500px;margin:0 0 28px}
.cta-row{display:flex;gap:12px;flex-wrap:wrap}
.cta-note{font-size:12.5px;color:var(--dim);margin:14px 0 0}

/* swap demo：商品图 → 成片 */
.swap{position:relative}
.swap .stage{position:relative;border-radius:20px;overflow:hidden;border:1px solid #2c2c32;background:#000;box-shadow:0 40px 80px -30px rgba(0,0,0,.9)}
.swap .stage video{width:100%;aspect-ratio:16/9;object-fit:cover}
.swap .pcard{position:absolute;left:-26px;bottom:-30px;width:34%;max-width:170px;background:#fff;border-radius:14px;padding:6px;box-shadow:0 20px 40px -10px rgba(0,0,0,.8);transform:rotate(-4deg);z-index:3}
.swap .pcard img{border-radius:9px;aspect-ratio:4/3;object-fit:cover;width:100%}
.swap .pcard span{display:block;color:#111;font-size:10.5px;font-weight:600;text-align:center;padding:4px 0 1px}
.swap .arrow{position:absolute;left:calc(34% - 40px);bottom:28px;z-index:4;width:44px;height:44px;border-radius:50%;background:var(--acc);color:var(--acc-ink);display:flex;align-items:center;justify-content:center;font-weight:700;font-size:20px;box-shadow:0 8px 20px rgba(0,0,0,.5)}
.vtag{position:absolute;right:12px;top:12px;z-index:2;font-size:12px;background:rgba(0,0,0,.62);backdrop-filter:blur(6px);border-radius:99px;padding:5px 11px;display:flex;gap:7px;align-items:center}
.snd{position:absolute;right:12px;bottom:12px;z-index:2;font-size:11.5px;background:rgba(0,0,0,.62);border-radius:99px;padding:4px 10px;border:0}
.picker{display:flex;gap:10px;justify-content:flex-end;margin-top:20px}
.picker button{background:var(--card);border:1px solid var(--line);border-radius:12px;padding:4px;width:64px;opacity:.6;transition:.2s}
.picker button.on{opacity:1;border-color:var(--acc)}
.picker img{border-radius:8px;aspect-ratio:1;object-fit:cover;width:100%;background:#fff}

/* badges */
.badge{display:inline-flex;align-items:center;gap:5px;font-size:11.5px;font-weight:600;padding:3px 9px;border-radius:99px;white-space:nowrap}
.badge::before{content:"";width:6px;height:6px;border-radius:50%;background:currentColor}
.b-ship{color:var(--ship);background:rgba(74,222,128,.13)}
.b-minor,.b-fail{color:var(--fail);background:rgba(248,113,113,.13)}

/* stats */
.stats{border-top:1px solid var(--line);border-bottom:1px solid var(--line);background:var(--bg2)}
.stats .wrap{display:grid;grid-template-columns:repeat(4,1fr)}
.stat{padding:26px 20px;border-left:1px solid var(--line)}
.stat:first-child{border-left:0}
.stat b{display:block;font-family:var(--serif);font-weight:400;font-size:44px;line-height:1.05}
.stat b small{font-size:22px;color:var(--dim)}
.stat span{font-size:13px;color:var(--mute)}

/* sections */
section.blk{padding:88px 0;border-bottom:1px solid var(--line)}
.kicker{font-size:12.5px;letter-spacing:.12em;text-transform:uppercase;color:var(--acc);margin-bottom:12px}
h2{font-family:var(--serif);font-weight:400;font-size:clamp(34px,4vw,50px);line-height:1.06;letter-spacing:-.015em;margin:0 0 36px}
.head-row{display:flex;justify-content:space-between;align-items:flex-end;gap:20px;flex-wrap:wrap}
.head-row h2{margin-bottom:28px}

/* filters */
.filters{display:flex;gap:8px;margin-bottom:28px}
.chip{background:var(--card);border:1px solid var(--line);color:var(--mute);border-radius:99px;padding:6px 14px;font-size:13px}
.chip.on{background:var(--text);color:var(--bg);border-color:var(--text)}

/* test cards */
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;cursor:pointer;transition:border-color .2s,transform .2s;display:flex;flex-direction:column;text-align:left;padding:0}
.card:hover{border-color:#3d3d45;transform:translateY(-2px)}
.card .pv{position:relative;background:#000;aspect-ratio:16/10;overflow:hidden}
.card .pv img,.card .pv video{width:100%;height:100%;object-fit:cover;position:absolute;inset:0}
.card .pv video{opacity:0;transition:opacity .2s}
.card:hover .pv video.ready{opacity:1}
.card .prod{position:absolute;left:10px;bottom:10px;width:58px;border-radius:9px;background:#fff;padding:3px;z-index:2;box-shadow:0 6px 14px rgba(0,0,0,.5)}
.card .prod img{position:static;border-radius:6px;aspect-ratio:1;object-fit:cover}
.tier{position:absolute;right:10px;top:10px;z-index:2;font-size:11px;font-weight:700;letter-spacing:.04em;border-radius:99px;padding:3px 10px;background:rgba(0,0,0,.7)}
.tier.free{background:var(--acc);color:var(--acc-ink)}
.tier.miss{color:var(--fail)}
.card .body{padding:14px 16px 16px;display:flex;flex-direction:column;gap:10px}
.card h3{margin:0;font-size:16px;letter-spacing:-.01em;font-weight:600}
.rows{display:flex;gap:14px;font-size:13px;color:var(--mute)}
.rows span{display:flex;align-items:center;gap:6px}
.ok,.no{width:18px;height:18px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;font-size:11px;font-weight:800}
.ok{background:rgba(74,222,128,.16);color:var(--ship)}
.no{background:rgba(248,113,113,.16);color:var(--fail)}

/* how */
.how{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.step{background:var(--card);border:1px solid var(--line);border-radius:var(--r);overflow:hidden}
.step .vis{position:relative;aspect-ratio:16/10;background:#000}
.step .vis img{width:100%;height:100%;object-fit:cover}
.step .vis .prod{position:absolute;left:12px;bottom:12px;width:30%;background:#fff;border-radius:9px;padding:3px}
.step .vis .prod img{aspect-ratio:1;border-radius:6px}
.step .vis .n{position:absolute;left:12px;top:10px;font-family:var(--serif);font-size:40px;color:var(--acc);line-height:1;text-shadow:0 2px 12px rgba(0,0,0,.6)}
.step .vis .badge{position:absolute;right:10px;top:10px}
.step h4{margin:0;padding:16px 18px 18px;font-size:16px;font-weight:600}

/* kit */
.kitgrid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.ktile{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:22px;display:flex;gap:14px;align-items:flex-start}
.ktile .ic{flex:none;width:40px;height:40px;border-radius:11px;background:rgba(216,255,92,.1);color:var(--acc);display:flex;align-items:center;justify-content:center;font-size:19px}
.ktile h4{margin:2px 0 4px;font-size:15.5px;font-weight:600}
.ktile p{margin:0;color:var(--mute);font-size:13.5px;line-height:1.5}
.ktile .pill{display:inline-block;font-size:10.5px;font-weight:700;color:var(--acc);border:1px solid rgba(216,255,92,.4);border-radius:99px;padding:0 7px;margin-left:6px;vertical-align:2px}

/* pricing */
.plans{display:grid;grid-template-columns:repeat(var(--cols,2),minmax(0,1fr));gap:18px;max-width:var(--pw,780px);margin:0 auto}
.plan{background:var(--card);border:1px solid var(--line);border-radius:20px;padding:28px;display:flex;flex-direction:column;gap:14px}
.plan.hot{border-color:var(--acc);background:linear-gradient(180deg,rgba(216,255,92,.08),var(--card) 45%)}
.plan .pill{align-self:flex-start;font-size:11.5px;font-weight:700;background:var(--acc);color:var(--acc-ink);border-radius:99px;padding:3px 10px}
.plan h3{margin:0;font-size:18px;font-weight:600}
.plan .amt{font-family:var(--serif);font-size:56px;line-height:1}
.plan .amt small{font-family:var(--sans);font-size:14px;color:var(--mute);margin-left:6px}
.plan ul{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:9px;font-size:14px;color:#d4d4d8}
.plan li{padding-left:24px;position:relative}
.plan li::before{content:"✓";position:absolute;left:0;color:var(--acc);font-weight:700}
.plan .btn{margin-top:auto}
.plan .fine{font-size:12px;color:var(--dim);text-align:center;margin:-4px 0 0}
.raise{text-align:center;color:var(--mute);font-size:13.5px;margin:26px 0 0}
.raise b{color:var(--text)}

/* faq */
.faq{max-width:780px}
.faq details{border-bottom:1px solid var(--line);padding:18px 0}
.faq summary{cursor:pointer;font-size:16.5px;list-style:none;display:flex;justify-content:space-between;gap:16px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--mute);font-size:20px;line-height:1}
.faq details[open] summary::after{content:"–"}
.faq p{color:var(--mute);margin:10px 0 0}

footer{padding:40px 0 70px;color:var(--mute);font-size:13px}
footer .wrap{display:flex;justify-content:space-between;gap:20px;flex-wrap:wrap}
footer p{margin:10px 0 0;max-width:520px}

/* modal */
.modal{position:fixed;inset:0;background:rgba(0,0,0,.75);backdrop-filter:blur(6px);z-index:100;display:none;overflow-y:auto;padding:40px 20px}
.modal.on{display:block}
.mwrap{position:relative;max-width:1040px;margin:0 auto;background:var(--bg2);border:1px solid var(--line);border-radius:20px;padding:28px}
.mwrap.small{max-width:440px}
.x{position:absolute;top:12px;right:16px;background:none;border:0;color:#fff;font-size:30px;line-height:1;z-index:5}
.mhead{display:flex;justify-content:space-between;align-items:flex-end;gap:16px;flex-wrap:wrap;margin:0 30px 20px 0}
.mhead h3{font-family:var(--serif);font-weight:400;font-size:34px;line-height:1.1;margin:0}
.mhead .by{color:var(--mute);font-size:13px}
.runs{display:grid;grid-template-columns:repeat(var(--n,3),minmax(0,1fr));gap:14px}
.run{background:var(--card);border:1px solid var(--line);border-radius:14px;overflow:hidden;display:flex;flex-direction:column}
.run .v{position:relative;background:#000}
.run video{width:100%;aspect-ratio:16/9;object-fit:contain;background:#000}
.run .m{padding:12px 14px 14px;display:flex;flex-direction:column;gap:6px}
.run .m h4{margin:0;font-size:14px;font-weight:600;display:flex;justify-content:space-between;gap:8px;align-items:center}
.run .m p{margin:0;font-size:13px;color:var(--mute)}
.run .ph{position:absolute;left:10px;bottom:10px;width:56px;background:#fff;border-radius:8px;padding:3px}
.run .ph img{border-radius:5px;aspect-ratio:1;object-fit:cover}
.unlock{margin-top:20px;background:var(--card);border:1px solid var(--line);border-radius:14px;padding:20px;display:flex;justify-content:space-between;align-items:center;gap:18px;flex-wrap:wrap}
.unlock .l{display:flex;gap:14px;align-items:center}
.unlock .l img{width:64px;border-radius:9px;background:#fff;aspect-ratio:1;object-fit:cover}
.unlock h4{margin:0 0 3px;font-size:15px}
.unlock p{margin:0;color:var(--mute);font-size:13px}
.unlock.miss{border-color:rgba(248,113,113,.35)}

/* kit viewer */
.kv{display:grid;grid-template-columns:240px minmax(0,1fr);gap:24px}
.kv aside img{border-radius:12px;background:#fff;width:100%}
.kv aside dl{margin:16px 0 0;font-size:13px;display:grid;grid-template-columns:auto 1fr;gap:6px 12px}
.kv aside dt{color:var(--dim)}
.kv aside dd{margin:0}
.kv h4{margin:0 0 8px;font-size:14px;font-weight:600;display:flex;align-items:center;gap:8px}
.kv h4 .n{width:22px;height:22px;border-radius:50%;background:var(--acc);color:var(--acc-ink);display:inline-flex;align-items:center;justify-content:center;font-size:12px}
.kv .blkk{margin-bottom:22px}
.kv pre{white-space:pre-wrap;word-break:break-word;font:12.5px/1.65 ui-monospace,Menlo,monospace;color:#d6d6dc;margin:0;background:#0d0d0f;border:1px solid var(--line);border-radius:10px;padding:14px;max-height:280px;overflow:auto}
.kv pre mark{background:rgba(216,255,92,.22);color:#f4ffd0;border-radius:3px;padding:0 1px}
.kv .hint{font-size:12px;color:var(--dim);margin:6px 0 0}
.kv .row{display:flex;gap:10px;flex-wrap:wrap;margin-top:6px}

/* form */
.form h3{font-family:var(--serif);font-weight:400;font-size:32px;margin:0 0 8px;line-height:1.1}
.form p{color:var(--mute);margin:0 0 18px;font-size:14px}
.form .thumbs{display:flex;gap:10px;margin-bottom:18px}
.form .thumbs img{width:50%;border-radius:10px;aspect-ratio:16/10;object-fit:cover}
input.field{width:100%;background:var(--card);border:1px solid var(--line);color:var(--text);border-radius:12px;padding:13px 14px;font-size:15px;outline:none;margin:0 0 12px}
input.field:focus{border-color:#55555c}
.toast{position:fixed;bottom:84px;left:50%;transform:translateX(-50%);background:var(--text);color:var(--bg);padding:10px 18px;border-radius:99px;font-size:14px;z-index:200;opacity:0;transition:opacity .2s;pointer-events:none;max-width:90vw;text-align:center}
.toast.on{opacity:1}

/* mobile sticky bar */
.mbar{display:none}

/* 决策面板（只在 ?review=1 时出现，给主公挑方案用） */
.rv-btn{position:fixed;left:14px;bottom:14px;z-index:90;background:#fff;color:#111;border:0;border-radius:99px;padding:9px 14px;font-size:13px;font-weight:700;box-shadow:0 8px 24px rgba(0,0,0,.5)}
.rv{position:fixed;left:14px;bottom:62px;z-index:90;width:300px;max-height:75vh;overflow:auto;background:#fff;color:#111;border-radius:16px;padding:16px;font-size:13px;box-shadow:0 20px 50px rgba(0,0,0,.6);display:none}
.rv.on{display:block}
.rv h5{margin:0 0 4px;font-size:14px}
.rv .q{margin:14px 0 6px;font-weight:700}
.rv .q small{font-weight:400;color:#666;display:block}
.rv label{display:flex;gap:7px;align-items:flex-start;padding:3px 0;cursor:pointer}
.rv input{margin-top:3px}

@media (max-width:900px){
  .nav nav{display:none}
  .nav .wrap{gap:10px}
  .hero{padding:26px 0 44px}
  .hero .wrap{grid-template-columns:1fr;gap:34px}
  h1{font-size:42px}
  .lead{font-size:16px;margin-bottom:22px}
  .swap .pcard{left:-6px;bottom:-22px;width:32%}
  .swap .arrow{left:calc(32% - 22px);bottom:10px;width:36px;height:36px;font-size:16px}
  .picker{justify-content:flex-end;margin-top:14px}
  .picker button{width:52px}
  .stats .wrap{grid-template-columns:repeat(2,1fr)}
  .stat{padding:18px 16px}
  .stat:nth-child(3){border-left:0}
  .stat:nth-child(n+3){border-top:1px solid var(--line)}
  .stat b{font-size:36px}
  section.blk{padding:60px 0}
  h2{margin-bottom:26px}
  .grid,.how,.kitgrid{grid-template-columns:1fr}
  .plans{grid-template-columns:1fr}
  .filters{margin-bottom:20px}
  .modal{padding:0}
  .mwrap{border-radius:0;min-height:100%;padding:20px 16px 90px;border:0}
  .mhead h3{font-size:28px}
  .runs{grid-template-columns:1fr}
  .kv{grid-template-columns:1fr}
  .kv aside{display:grid;grid-template-columns:110px 1fr;gap:14px;align-items:start}
  .kv aside dl{margin:0}
  .mbar{display:flex;position:fixed;left:0;right:0;bottom:0;z-index:70;justify-content:space-between;align-items:center;gap:10px;padding:10px 16px calc(10px + env(safe-area-inset-bottom));background:rgba(17,17,19,.96);backdrop-filter:blur(10px);border-top:1px solid var(--line);font-size:13px;color:#d4d4d8}
  footer{padding-bottom:110px}
  .rv-btn{bottom:72px}
  .rv{bottom:118px;width:calc(100vw - 28px)}
}

.pitl{margin:0;padding-left:18px;color:#d4d4d8;font-size:13.5px;display:flex;flex-direction:column;gap:6px}

.grid{grid-template-columns:repeat(4,1fr)}
.grid.miss{grid-template-columns:repeat(4,1fr)}
.misshead{margin:44px 0 18px}
.misshead h3{font-family:var(--serif);font-weight:400;font-size:30px;margin:0 0 4px}
.misshead p{margin:0;color:var(--mute);font-size:14px}
@media (max-width:1000px){.grid,.grid.miss{grid-template-columns:repeat(3,1fr)}}
@media (max-width:900px){
  .grid,.grid.miss{grid-template-columns:repeat(2,1fr);gap:12px}
  .card .body{padding:10px 11px 12px;gap:7px}
  .card h3{font-size:13.5px;line-height:1.35}
  .rows{gap:8px;font-size:11.5px}
  .ok,.no{width:15px;height:15px;font-size:9px}
  .card .prod{width:40px;left:7px;bottom:7px}
  .tier{font-size:9.5px;padding:2px 7px;right:7px;top:7px}
  .how{gap:12px}
  .step{display:grid;grid-template-columns:44% 1fr;align-items:center}
  .step .vis .n{font-size:30px}
  .step .vis .badge{display:none}
  .step h4{padding:12px 14px;font-size:14.5px}
  .kitgrid{grid-template-columns:repeat(2,1fr);gap:10px}
  .ktile{flex-direction:column;padding:16px;gap:10px}
  .ktile .ic{width:34px;height:34px;font-size:16px}
  .ktile h4{font-size:14px}
  .ktile p{font-size:12.5px}
}

.run .ph{bottom:auto;top:10px;left:10px;width:48px}
.run .snd.vs{right:8px;bottom:8px;font-size:12px;padding:6px 11px;background:rgba(0,0,0,.72);border:1px solid rgba(255,255,255,.18);cursor:pointer}
.snd{cursor:pointer}
.raise{line-height:1.9}
.lang[hidden]{display:none}

.warn{width:18px;height:18px;border-radius:50%;display:inline-flex;align-items:center;justify-content:center;font-size:11px;font-weight:800;background:rgba(251,191,36,.16);color:var(--minor)}
.b-minor,.b-fail{color:var(--minor);background:rgba(251,191,36,.13)}
@media (max-width:900px){.warn{width:15px;height:15px;font-size:9px}}