:root{--ink:#111;--text:#323232;--muted:#6b6b6b;--line:rgba(17,17,17,.1);--accent:#0f4c81;--accent2:#307fe2;--font:'Noto Sans SC','PingFang SC',sans-serif;--latin:montserrat,'Noto Sans SC',sans-serif;
 --glass:linear-gradient(rgba(255,255,255,.72),rgba(255,255,255,.42));--gborder:1px solid rgba(255,255,255,.85);--gshadow:0 8px 32px rgba(15,76,129,.10),inset 0 1px 0 rgba(255,255,255,.9)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font:16px/1.7 var(--font);color:var(--text);background:#f6f8fb;-webkit-font-smoothing:antialiased}
.bg{position:fixed;inset:0;z-index:-1;overflow:hidden;background:linear-gradient(180deg,#fbfcfe,#eef3f9)}.bg i{position:absolute;border-radius:50%;filter:blur(90px);opacity:.55}
.b1{width:620px;height:620px;left:-120px;top:-160px;background:#9cc4ee}.b2{width:520px;height:520px;right:-100px;top:120px;background:#bfe3e6}.b3{width:560px;height:560px;left:35%;bottom:-260px;background:#c9d6f5}
.glass{background:var(--glass);border:var(--gborder);box-shadow:var(--gshadow);backdrop-filter:blur(22px) saturate(1.5);-webkit-backdrop-filter:blur(22px) saturate(1.5)}
.nav{position:fixed;top:18px;left:50%;transform:translateX(-50%);z-index:20;display:flex;align-items:center;gap:6px;padding:8px 10px 8px 20px;border-radius:999px;background:var(--glass);border:var(--gborder);box-shadow:var(--gshadow);backdrop-filter:blur(22px) saturate(1.5);-webkit-backdrop-filter:blur(22px) saturate(1.5);white-space:nowrap}
.nav .logo{font:700 14px var(--latin);letter-spacing:.04em;color:var(--ink);margin-right:14px;cursor:pointer}.nav .logo em{font-style:normal;color:var(--accent)}
.nav a.l{color:var(--muted);text-decoration:none;font-size:14px;padding:6px 14px;border-radius:999px}.nav a.l:hover{color:var(--ink);background:rgba(255,255,255,.7)}
.nav .pill{font-size:12px;color:var(--accent);background:rgba(255,255,255,.8);border:1px solid rgba(15,76,129,.15);border-radius:999px;padding:5px 12px;cursor:pointer;margin-left:8px}
button{font:600 15px var(--font);cursor:pointer;border:1px solid var(--ink);border-radius:999px;padding:0 24px;min-height:46px;background:var(--ink);color:#fff;transition:.15s}button:hover{background:#333}
button.ghost{background:rgba(255,255,255,.7);color:var(--ink)}button.ghost:hover{background:var(--ink);color:#fff}button:disabled{opacity:.4;cursor:not-allowed}button.sm{min-height:36px;padding:0 16px;font-size:13px}
.eyebrow{font:600 12px var(--latin);letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}
.hero{min-height:100vh;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:120px 24px 60px}
.hero h1{font-size:clamp(34px,5vw,60px);line-height:1.14;letter-spacing:-.035em;margin:14px 0 14px;color:var(--ink);font-weight:700}.hero h1 .soft{color:#8b97a6}
.hero p.sub{font-size:17px;color:var(--muted);max-width:560px;margin:0 0 34px}
.cbox{width:min(720px,100%);border-radius:28px;padding:16px 16px 12px;text-align:left;view-transition-name:cbox}
.cbox textarea{width:100%;border:0;outline:0;resize:none;background:transparent;font:16px/1.7 var(--font);min-height:64px;color:var(--ink)}
.cbar{display:flex;align-items:center;gap:10px}.cbar .sp{flex:1}.cbar .hint{font-size:12px;color:var(--muted)}
.clip{cursor:pointer;font-size:13px;color:var(--text);border:1px solid var(--line);background:rgba(255,255,255,.7);border-radius:999px;padding:6px 14px;display:inline-flex;gap:6px;align-items:center}.clip:hover{border-color:var(--ink)}
.go{width:44px;height:44px;padding:0;border-radius:50%;display:grid;place-items:center;font-size:18px}
.guides{display:flex;flex-wrap:wrap;gap:10px;justify-content:center;margin-top:20px;max-width:760px}
.guides button{background:rgba(255,255,255,.6);border:1px solid rgba(255,255,255,.9);color:var(--text);font-weight:500;font-size:13px;min-height:36px;padding:0 16px;backdrop-filter:blur(10px)}.guides button:hover{background:#fff;border-color:var(--accent)}
.scrollhint{margin-top:44px;font-size:12px;color:var(--muted);letter-spacing:.1em}
.sec{max-width:1120px;margin:0 auto;padding:96px 28px 8px}.sec h2{font-size:clamp(26px,3.2vw,38px);letter-spacing:-.025em;color:var(--ink);margin:8px 0 10px;line-height:1.25}.sec p.lead{color:var(--muted);max-width:640px;margin:0 0 32px}
.card{border-radius:24px;padding:24px}
.tabs{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:18px}.tabs button{background:rgba(255,255,255,.6);color:var(--text);border:1px solid rgba(255,255,255,.9);min-height:36px;font-size:13px;font-weight:500}.tabs button.on{background:var(--ink);color:#fff;border-color:var(--ink)}
.two{display:grid;grid-template-columns:1fr 1fr;gap:20px}.need li{margin:6px 0}.need ul{margin:8px 0 0;padding-left:20px}
.struct{display:flex;flex-direction:column;gap:6px}.struct div{padding:8px 12px;border-radius:10px;background:rgba(255,255,255,.7);border:1px solid var(--line);font-size:14px}.struct div b{color:var(--accent);margin-right:6px}
.case{display:grid;grid-template-columns:1fr;gap:10px}.crow{display:grid;grid-template-columns:150px 1fr;gap:16px;padding:14px 16px;border-radius:16px;background:rgba(255,255,255,.65);border:1px solid rgba(255,255,255,.9)}
.crow .k{font-weight:700;color:var(--ink);font-size:14px}.crow .k small{display:block;color:var(--accent);font-weight:500}.crow q{display:block;quotes:none;font-size:14px;color:var(--text)}.crow .na{color:var(--muted);font-size:13px}
.std{display:grid;grid-template-columns:1.15fr .85fr;gap:20px;align-items:start}.blocks{display:flex;flex-direction:column;gap:8px}
.blk{display:flex;gap:12px;align-items:center;padding:12px 16px;border-radius:14px;background:rgba(255,255,255,.8);border:1.5px solid var(--accent);cursor:pointer;transition:.15s;font-size:14px}.blk .n{width:24px;height:24px;border-radius:6px;background:var(--accent);color:#fff;display:grid;place-items:center;font:700 12px var(--latin);flex:none}
.blk.opt{border-style:dashed;border-color:#8b97a6}.blk.opt .n{background:#8b97a6}.blk.cta{background:var(--accent);color:#fff}.blk.cta .n{background:#fff;color:var(--accent)}.blk:hover,.blk.on{transform:translateX(4px);box-shadow:0 6px 18px rgba(15,76,129,.18)}
.blk .tg{margin-left:auto;font-size:11px;color:var(--accent);border:1px solid currentColor;border-radius:4px;padding:0 6px}.blk.opt .tg{color:#8b97a6}.blk.cta .tg{color:#fff}
.detail{position:sticky;top:90px}.detail h3{margin:0 0 6px;color:var(--ink)}.legend{display:flex;gap:14px;font-size:12px;color:var(--muted);margin-top:12px;flex-wrap:wrap}
.platform img{width:100%;border-radius:18px;background:#fff}
.phases{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:20px}.phase{border-radius:18px;padding:16px;cursor:pointer}.phase.on{outline:2px solid var(--ink)}.phase b{color:var(--ink)}.phase small{display:block;color:var(--muted);margin-top:4px;line-height:1.6}
.steps{display:flex;gap:8px;flex-wrap:wrap;margin-top:14px}.steps span{font-size:12px;padding:4px 12px;border-radius:999px;background:rgba(255,255,255,.75);border:1px solid var(--line)}.steps span i{font-style:normal;color:var(--accent);font-weight:700;margin-right:4px}
details{border-top:1px solid var(--line);padding:16px 4px}details:last-child{border-bottom:1px solid var(--line)}summary{cursor:pointer;font-weight:600;color:var(--ink);list-style:none;display:flex;justify-content:space-between}summary::after{content:"+";color:var(--muted)}details[open] summary::after{content:"–"}details p{margin:10px 0 0;color:var(--muted)}
footer.ft{text-align:center;color:var(--muted);font-size:13px;padding:80px 20px 40px}
.ws{display:grid;grid-template-columns:1fr 440px;gap:16px;height:100vh;padding:84px 16px 16px}
.main{border-radius:24px;overflow:auto;padding:28px}.panel{border-radius:24px;display:flex;flex-direction:column;min-height:0;view-transition-name:cbox}
.phead{padding:14px 18px;border-bottom:1px solid var(--line);font-weight:600;color:var(--ink);display:flex;justify-content:space-between;font-size:14px}.phead small{color:var(--muted);font-weight:400}
.msgs{flex:1;overflow:auto;padding:16px;display:flex;flex-direction:column;gap:10px}
.m{max-width:92%;padding:10px 14px;border-radius:16px;background:rgba(255,255,255,.8);border:1px solid rgba(255,255,255,.9);white-space:pre-wrap;color:var(--ink);font-size:14.5px}.m.u{align-self:flex-end;background:var(--ink);color:#fff;border-color:var(--ink)}
.insight{align-self:flex-start;max-width:92%;border-left:3px solid var(--accent2);background:rgba(241,246,253,.9);padding:8px 12px;border-radius:6px;font-size:12.5px}.insight b{display:block;font:600 11px var(--latin);letter-spacing:.08em;color:var(--accent)}
.att{align-self:flex-end;font-size:12px;border:1px solid var(--line);border-radius:12px;padding:4px 12px;background:rgba(255,255,255,.8)}.stat{font-size:11px;color:#9aa4b2;align-self:flex-start;margin-top:-4px}
.chips{padding:0 16px 8px;display:flex;flex-wrap:wrap;gap:6px}.chips button{background:rgba(255,255,255,.8);color:var(--ink);border:1px solid var(--line);min-height:32px;padding:0 12px;font-weight:500;font-size:12.5px;text-align:left}.chips button:hover{border-color:var(--ink);background:#fff}
.pin{padding:10px 14px 14px;border-top:1px solid var(--line)}.pin .cbar{margin-top:6px}.pin textarea{width:100%;border:0;outline:0;resize:none;background:transparent;font:14.5px/1.6 var(--font);min-height:44px}
.row{padding:10px 0;border-bottom:1px dashed var(--line);font-size:14.5px;color:var(--ink)}.row span{color:var(--muted);display:block;font:600 11px var(--latin);letter-spacing:.08em}.row.empty em{color:#b5bdc8}
.fact{font-size:13.5px;padding:6px 0;border-bottom:1px dashed var(--line)}.fact small{display:block;color:var(--accent)}.gap{font-size:13.5px;color:#b36b00}
.main h3{margin:0 0 6px;font-size:22px;color:var(--ink)}.main .sub2{color:var(--muted);font-size:14px;margin-bottom:12px}
.gen{max-width:520px;margin:12vh auto;text-align:center}.bar{height:6px;background:rgba(17,17,17,.08);border-radius:4px;overflow:hidden;margin:20px 0}.bar i{display:block;height:100%;background:var(--ink);width:0;transition:width .5s}
.pv{display:grid;grid-template-columns:1fr 250px;gap:14px;height:100%}.frame-wrap{background:rgba(17,17,17,.05);border-radius:18px;padding:10px;display:flex;justify-content:center;min-height:0}.frame{background:#fff;width:100%;height:100%;border:0;border-radius:12px;transition:width .3s}.frame.mob{width:390px}
.sidebox{border-radius:16px;padding:14px;font-size:13px;background:rgba(255,255,255,.65);border:1px solid rgba(255,255,255,.9);margin-bottom:10px}.sidebox b{color:var(--ink)}.sidebox ul{padding:0;margin:6px 0}.sidebox li{list-style:none;margin:2px 0}
.ok::before{content:"✓ ";color:#1a8f3c}.todo::before{content:"○ ";color:#999}
.modal{position:fixed;inset:0;z-index:50;background:rgba(17,17,17,.25);backdrop-filter:blur(4px);display:grid;place-items:center}.modal[hidden]{display:none}.mbox{width:min(460px,92vw);border-radius:24px;padding:24px;background:rgba(255,255,255,.92)}
.mbox label{display:block;font-size:12px;color:var(--muted);margin:14px 0 4px}.mbox input,.mbox select{width:100%;font:inherit;padding:10px 14px;border:1px solid var(--line);border-radius:12px;background:#fff}
@media(max-width:900px){.two,.std,.ws,.pv{grid-template-columns:1fr}.phases{grid-template-columns:1fr 1fr}.ws{height:auto}.nav a.l{padding:6px 8px}.crow{grid-template-columns:1fr}.nav .pill{display:none}}
@media(prefers-reduced-motion:no-preference){.sec{animation:up .6s both}@keyframes up{from{opacity:0;transform:translateY(14px)}to{opacity:1;transform:none}}}