:root{--deep:#0c302d;--ink:#173432;--paper:#f6f3ea;--white:#fff;--teal:#23877e;--gold:#d7aa50;--coral:#c55b4f;--muted:#637773;--line:#ccd7d2;--fs:18px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font:var(--fs)/1.68 "Source Han Sans CN","PingFang SC",sans-serif;letter-spacing:0}button,a,input{font:inherit}button,a{touch-action:manipulation}.skip-link{position:fixed;z-index:20;top:-70px;left:16px;background:#fff;color:#000;padding:12px}.skip-link:focus{top:12px}.topbar{position:sticky;z-index:10;top:0;display:flex;align-items:center;gap:28px;height:86px;padding:10px clamp(18px,5vw,70px);background:rgba(246,243,234,.96);border-bottom:1px solid var(--line);backdrop-filter:blur(12px)}.brand{margin-right:auto}.brand img{display:block;width:280px;height:68px;object-fit:contain}.topbar nav{display:flex;gap:28px}.topbar a{color:var(--ink);text-decoration:none;font-weight:700}.icon-button{width:48px;height:48px;border:1px solid var(--ink);background:transparent;color:inherit}.hero{position:relative;min-height:650px;display:flex;align-items:end;padding:70px clamp(24px,7vw,100px);overflow:hidden;background:#061f1d}.hero>img{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;object-position:center 55%}.hero::after{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(5,28,27,.96),rgba(5,28,27,.72) 48%,rgba(5,28,27,.1))}.hero-copy{position:relative;z-index:1;max-width:720px;color:#fff}.eyebrow{margin:0 0 12px;color:#8fd7cd;font-size:.86rem;font-weight:800}.hero h1{margin:0 0 18px;font:800 clamp(44px,7vw,90px)/1.04 "Source Han Serif CN",serif}.hero p{max-width:650px}.actions{display:flex;flex-wrap:wrap;gap:12px;margin-top:28px}.button{min-height:52px;padding:12px 22px;border:1px solid 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var(--line);background:#fff;cursor:pointer}.choice.selected{border-color:var(--teal);background:#e1f1ed}.progress{height:8px;background:#dfe7e3}.progress span{display:block;height:100%;background:var(--teal)}input[type=range]{width:100%}.report-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.metric{padding:24px;background:#eef4f1;border-top:4px solid var(--gold)}.metric strong{display:block;font:800 2rem "IBM Plex Mono",monospace}.settings{position:fixed;z-index:30;top:0;right:-400px;width:min(380px,90vw);height:100%;padding:28px;background:#fff;transition:right .25s}.settings.open{right:0}.settings-head{display:flex;justify-content:space-between}.settings label{display:block;margin-top:24px}.backdrop{position:fixed;z-index:20;inset:0;background:rgba(0,0,0,.48)}footer{padding:30px 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.brand img{width:360px}@media(max-width:850px){.brand img{width:250px;max-width:calc(100vw - 92px)}}