:root{--ink:#101114;--muted:#687078;--line:#dde2e5;--soft:#f4f6f6;--green:#10a37f;--blue:#486cff;--red:#dc5a59;--radius:22px;--shadow:0 24px 70px rgba(20,30,38,.08)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;color:var(--ink);background:#fbfcfc;font:15px/1.55 Inter,-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif}button,input,select,textarea{font:inherit;color:inherit}button,a{transition:.2s ease}a{color:inherit;text-decoration:none}.locked{overflow:hidden}.topbar{height:72px;display:flex;align-items:center;justify-content:space-between;padding:0 max(28px,calc((100vw - 1200px)/2));border-bottom:1px solid rgba(20,25,30,.08);background:rgba(255,255,255,.86);backdrop-filter:blur(20px);position:sticky;top:0;z-index:20}.brand{display:flex;gap:9px;align-items:center;font-size:20px;font-weight:750;letter-spacing:-.7px}.brand span:last-child{color:var(--green)}.brand-spark{display:grid;place-items:center;width:30px;height:30px;border-radius:9px;background:var(--ink);color:#fff!important}.topbar nav{display:flex;align-items:center;gap:22px;color:#4f575e}.topbar nav a:hover{color:var(--ink)}button,.primary,.quiet{border:0;cursor:pointer}.quiet{padding:10px 15px;border-radius:12px;background:#f0f2f2}.quiet:hover{background:#e6eaea}.primary{display:inline-flex;align-items:center;justify-content:center;gap:16px;padding:14px 22px;border-radius:14px;background:var(--ink);color:#fff;font-weight:700;box-shadow:0 8px 22px rgba(16,17,20,.16)}.primary:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(16,17,20,.23)}.shell,.result-shell,.method-shell{width:min(1200px,calc(100% - 40px));margin:auto}.hero{padding:92px 0 62px;display:grid;grid-template-columns:1.6fr 1fr;gap:80px;align-items:end}.eyebrow{margin:0 0 15px;color:#0b876a;font-size:12px;font-weight:800;letter-spacing:1.8px;text-transform:uppercase}.hero h1,.method-hero h1{font-size:clamp(48px,7vw,94px);line-height:.96;letter-spacing:-5px;margin:0}.hero h1 span{background:linear-gradient(110deg,#128e73,#4a66ff);-webkit-background-clip:text;color:transparent}.hero>p{font-size:20px;color:var(--muted);margin:0;max-width:480px}.model-note{padding:24px 28px;border:1px solid #d4e9e3;border-radius:18px;background:linear-gradient(120deg,#effbf7,#f5f7ff);display:flex;gap:28px;align-items:center}.model-note b{white-space:nowrap}.model-note span{color:#59666b}.form-card{background:#fff;margin:28px 0 80px;border:1px solid var(--line);border-radius:28px;box-shadow:var(--shadow);overflow:hidden}.form-section{padding:40px 44px;border-bottom:1px solid var(--line)}.form-section>header{display:grid;grid-template-columns:48px 1fr;margin-bottom:30px}.form-section>header>span{color:var(--green);font-weight:800}.form-section h2,.history h2,.result-section h2,.method-cta h2{font-size:26px;margin:0;letter-spacing:-.7px}.form-section header p{margin:5px 0 0;color:var(--muted)}.field-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}.field-grid.three{grid-template-columns:repeat(3,1fr)}.field-grid .wide{grid-column:span 2}.field-grid.three .wide{grid-column:span 3}label{font-weight:650;display:grid;gap:8px}label small{font-weight:400;color:#8b9297}input,select,textarea,.currency-lock{width:100%;border:1px solid #d4dadd;border-radius:13px;background:#fff;padding:14px 15px;outline:0}input:focus,select:focus,textarea:focus{border-color:#7b8dff;box-shadow:0 0 0 4px rgba(72,108,255,.1)}textarea{resize:vertical}.currency-lock{display:flex;align-items:center;justify-content:space-between;background:#f3f6f5}.currency-lock strong{font-size:18px}.currency-lock span{font-size:12px;color:var(--muted)}.money-input{position:relative}.money-input span{position:absolute;left:15px;top:14px;color:#82898f}.money-input input{padding-left:43px}.signals{border:0;padding:0;margin:25px 0 0;display:flex;gap:12px;flex-wrap:wrap}.signals legend{font-weight:700;margin-bottom:10px}.signals label{display:flex;align-items:center;gap:9px;border:1px solid var(--line);border-radius:999px;padding:10px 14px;font-weight:500}.signals input{width:auto;margin:0;accent-color:var(--green)}.form-submit{padding:30px 44px;display:flex;align-items:center;justify-content:space-between;background:#f7f9f8}.form-submit div{display:grid}.form-submit div span{color:var(--muted);font-size:13px}.history{padding:0 0 100px;display:grid;grid-template-columns:1fr 2fr;gap:60px}.history-list{display:grid;gap:10px}.history-list button{background:#fff;border:1px solid var(--line);border-radius:15px;padding:17px;text-align:left;display:flex;justify-content:space-between;align-items:center}.history-list button span{display:grid}.history-list small,.empty{color:var(--muted)}.history-list strong{font-size:24px}.transition{position:fixed;inset:0;background:rgba(250,252,251,.96);z-index:100;display:flex;flex-direction:column;align-items:center;justify-content:center;opacity:0;visibility:hidden;transition:.35s}.transition.active{opacity:1;visibility:visible}.transition-core{width:120px;height:120px;border:1px solid #dce4e2;border-radius:50%;display:grid;place-items:center;position:relative}.transition-core b{font-size:24px}.orbit{position:absolute;inset:-1px;border-radius:50%;border-top:3px solid var(--green);border-right:3px solid transparent;animation:spin 1.1s linear infinite}.transition h2{font-size:34px;margin:28px 0 4px}.transition p{color:var(--muted)}.progress{height:4px;background:#e5e9e8;border-radius:99px;width:min(380px,70vw);overflow:hidden;margin-top:14px}.progress i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--green),var(--blue));transition:.4s ease}@keyframes spin{to{transform:rotate(360deg)}}.auth-dialog{border:0;border-radius:22px;padding:34px;width:min(440px,calc(100% - 32px));box-shadow:0 30px 100px rgba(0,0,0,.25)}.auth-dialog::backdrop{background:rgba(25,30,35,.45);backdrop-filter:blur(5px)}.auth-dialog h2{font-size:30px;margin:0}.auth-dialog>p{color:var(--muted)}.auth-dialog form{display:grid;gap:16px}.auth-dialog .primary{width:100%}.dialog-close{position:absolute;right:20px;top:15px;background:none;font-size:26px}.text-button{background:none;color:#246cba;margin-top:14px}.danger{color:#c44}.form-error{color:#c44!important;min-height:20px}.toast{position:fixed;left:50%;bottom:30px;transform:translate(-50%,20px);background:#111;color:white;padding:12px 18px;border-radius:12px;opacity:0;z-index:120}.toast.show{opacity:1;transform:translate(-50%,0)}
/* results */.result-shell{padding:62px 0 100px}.result-head{display:flex;justify-content:space-between;align-items:end;padding:20px 0 44px}.back-link{display:inline-block;color:var(--muted);margin-bottom:36px}.result-head h1{font-size:clamp(42px,6vw,74px);line-height:1;margin:0;letter-spacing:-3px}.result-verdict{font-size:22px;color:#25765f;margin:18px 0 0}.score-card{width:210px;height:210px;border-radius:50%;background:radial-gradient(circle at 35% 30%,#fff,#e8f9f3 55%,#dce7ff);display:flex;flex-direction:column;align-items:center;justify-content:center;box-shadow:inset 0 0 0 1px #d7e6e1}.score-card strong{font-size:72px;line-height:1;letter-spacing:-5px}.score-card small{color:var(--muted)}.metric-row{display:grid;grid-template-columns:repeat(4,1fr);background:#11161a;color:#fff;border-radius:22px;overflow:hidden}.metric-row article{padding:25px;border-right:1px solid #30363a;display:grid}.metric-row article:last-child{border:0}.metric-row span,.metric-row small{color:#9ea7ad}.metric-row strong{font-size:29px;margin:9px 0}.result-section{padding:78px 0;border-bottom:1px solid var(--line)}.section-title{display:flex;justify-content:space-between;align-items:end;margin-bottom:30px}.section-title>p{width:420px;color:var(--muted);margin:0}.scenario-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}.scenario-grid article{padding:28px;border-radius:20px;border:1px solid var(--line);display:grid;background:#fff}.scenario-grid .down{background:#fff5f4}.scenario-grid .base{background:#f1f5ff}.scenario-grid .up{background:#effaf6}.scenario-grid strong{font-size:35px;margin:10px 0}.scenario-grid small{color:var(--muted)}.factor-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}.factor-grid article{padding:20px;background:#fff;border:1px solid var(--line);border-radius:16px}.factor-grid article>div:first-child{display:flex;justify-content:space-between}.factor-bar{height:7px;background:#edf0f0;border-radius:99px;margin-top:14px;overflow:hidden}.factor-bar i{display:block;height:100%;background:linear-gradient(90deg,var(--green),var(--blue));border-radius:99px;animation:grow .8s ease both}@keyframes grow{from{width:0}}.advice-grid{display:grid;gap:14px}.advice-grid article{display:grid;grid-template-columns:58px 1fr;padding:28px;background:#fff;border:1px solid var(--line);border-radius:18px}.advice-index{font-size:13px;color:var(--green);font-weight:800}.advice-grid article span{color:#267b66;font-size:12px;font-weight:800;text-transform:uppercase;letter-spacing:1px}.advice-grid h3{font-size:22px;margin:4px 0 7px}.advice-grid p{color:#5e676d;margin:0;max-width:900px}.method-cta{margin:72px 0 24px;padding:40px;border-radius:24px;background:linear-gradient(130deg,#e9faf4,#edf0ff);display:flex;justify-content:space-between;align-items:center}.method-cta p{color:var(--muted);margin:6px 0 0}.result-actions{display:flex;justify-content:flex-end;gap:12px}.empty-result{text-align:center;padding:150px 0}.empty-result h1{font-size:52px;margin:0}
/* methodology */.method-shell{max-width:980px;padding-bottom:100px}.method-hero{padding:100px 0 70px}.method-hero h1{font-size:clamp(48px,7vw,82px)}.method-hero>p:last-child{font-size:20px;color:var(--muted);max-width:760px}.method-block{padding:46px 0;border-top:1px solid var(--line);display:grid;grid-template-columns:80px 1fr}.method-block>span{color:var(--green);font-weight:800}.method-block h2{font-size:30px;margin:0 0 15px}.method-block p{color:#566168;font-size:17px}.method-block code{background:#eef2f2;color:#1d3031;padding:7px 10px;border-radius:8px}.weight-list{display:grid;gap:12px;margin:25px 0}.weight-list i{position:relative;display:flex;justify-content:space-between;padding:12px 14px;border-radius:10px;overflow:hidden;font-style:normal;background:#f1f3f3}.weight-list i:before{content:"";position:absolute;inset:0 auto 0 0;width:var(--w);background:#dff4ed}.weight-list b,.weight-list em{position:relative;font-style:normal}.warning{background:#fff8ec;margin:20px -30px;padding:36px 30px;border:0;border-radius:20px}.method-end{text-align:right;margin-top:30px}
@media(max-width:800px){.topbar{padding:0 16px}.topbar nav a:first-child{display:none}.shell,.result-shell,.method-shell{width:min(100% - 24px,1200px)}.hero{grid-template-columns:1fr;gap:26px;padding:55px 0 38px}.hero h1,.method-hero h1{letter-spacing:-2.5px}.model-note{display:grid;gap:6px}.form-section{padding:28px 20px}.field-grid,.field-grid.three{grid-template-columns:1fr}.field-grid .wide,.field-grid.three .wide{grid-column:auto}.form-submit{padding:24px 20px;display:grid;gap:20px}.history{grid-template-columns:1fr}.result-head{align-items:start}.score-card{width:130px;height:130px;flex:0 0 auto}.score-card strong{font-size:48px}.metric-row{grid-template-columns:1fr 1fr}.metric-row article:nth-child(2){border-right:0}.scenario-grid{grid-template-columns:1fr}.section-title{display:grid;gap:12px}.section-title>p{width:auto}.factor-grid{grid-template-columns:1fr}.method-cta{display:grid;gap:24px}.method-block{grid-template-columns:45px 1fr}.method-hero{padding-top:60px}}@media(max-width:540px){.topbar nav{gap:8px}.topbar nav>a{display:none!important}.hero h1{font-size:48px}.form-section>header{grid-template-columns:38px 1fr}.result-head{display:grid}.score-card{margin-top:30px}.metric-row{grid-template-columns:1fr}.metric-row article{border-right:0;border-bottom:1px solid #30363a}.result-section{padding:52px 0}.transition h2{font-size:26px}.advice-grid article{grid-template-columns:35px 1fr}}

/* live product research */
.research-panel{margin-top:24px;border:1px solid #cfe6df;border-radius:18px;background:linear-gradient(120deg,#f2fbf8,#f4f6ff);padding:20px 22px;display:grid;gap:16px}.research-state{display:grid;grid-template-columns:auto 1fr;column-gap:10px;align-items:center}.research-state small{grid-column:2;color:var(--muted)}.live-dot{width:9px;height:9px;border-radius:50%;background:#9da8a5;box-shadow:0 0 0 5px rgba(157,168,165,.14)}.research-panel.loading .live-dot{background:#f0a62e;animation:pulse 1s infinite}.research-panel.ready .live-dot{background:var(--green);box-shadow:0 0 0 5px rgba(16,163,127,.13)}.research-panel.error .live-dot{background:#b1b7bb}.research-metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:10px}.research-metrics>div{padding:14px;border:1px solid rgba(120,145,140,.2);background:rgba(255,255,255,.75);border-radius:13px;display:grid}.research-metrics span{font-size:12px;color:var(--muted)}.research-metrics strong{font-size:18px;margin-top:3px}.research-tags{display:flex;gap:8px;flex-wrap:wrap}.research-tags span{padding:6px 10px;background:#fff;border:1px solid #dce6e3;border-radius:999px;font-size:12px;color:#4d5a5c}.research-panel>p{font-size:12px;color:#737d82;margin:0}@keyframes pulse{50%{opacity:.35;transform:scale(.85)}}
@media(max-width:800px){.research-metrics{grid-template-columns:1fr}}
.evidence-strip{margin-top:16px;padding:20px 22px;border:1px solid #d9e5e2;border-radius:17px;background:#f5faf8;display:flex;align-items:center;justify-content:space-between;gap:24px}.evidence-strip>div:first-child{display:flex;align-items:flex-start;gap:13px}.evidence-strip .live-dot{margin-top:7px;background:var(--green)}.evidence-strip p{margin:3px 0 0;color:var(--muted);max-width:720px}.evidence-tags{display:flex;gap:7px;flex-wrap:wrap;justify-content:flex-end}.evidence-tags span{font-size:12px;padding:5px 9px;background:#fff;border:1px solid var(--line);border-radius:99px}.advice-grid ol{margin:18px 0 0;padding:16px 18px 16px 38px;background:#f6f8f8;border-radius:13px;color:#3f484d}.advice-grid li{padding:3px 0}.advice-grid li::marker{color:var(--green);font-weight:800}@media(max-width:800px){.evidence-strip{display:grid}.evidence-tags{justify-content:flex-start}}
.evidence-profile{display:flex;flex-wrap:wrap;gap:7px;margin-top:11px}.evidence-profile span{padding:4px 8px;border:1px solid #d5e4df;border-radius:999px;background:#fff;color:#45615a;font-size:11px}.factor-grid article>div:first-child span{display:flex;align-items:center;gap:8px}.factor-grid article>div:first-child small{padding:3px 7px;border-radius:999px;background:#f0f4f3;color:#74807c;font-size:10px;font-weight:600}.sensitivity-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.sensitivity-grid article{display:grid;grid-template-columns:32px 1fr auto;gap:12px;align-items:center;padding:22px;border:1px solid var(--line);border-radius:17px;background:#fff}.sensitivity-grid>article>span{display:grid;place-items:center;width:30px;height:30px;border-radius:9px;background:#fff0ee;color:#c54e4a;font-size:11px;font-weight:800}.sensitivity-grid article div{display:grid}.sensitivity-grid article small{color:var(--muted)}.sensitivity-grid article>strong{color:#b6423f;font-size:18px}.threshold-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1px;margin-top:16px;border:1px solid var(--line);border-radius:17px;background:var(--line);overflow:hidden}.threshold-grid article{display:grid;gap:5px;padding:20px;background:#f7faf9}.threshold-grid span{color:var(--muted);font-size:12px}.threshold-grid strong{font-size:22px}@media(max-width:800px){.sensitivity-grid,.threshold-grid{grid-template-columns:1fr}.factor-grid article>div:first-child span{align-items:flex-start;flex-direction:column;gap:3px}}