:root{--ink:#17324d;--muted:#71869a;--canvas:#eef5f7;--line:#d9e5eb;--brand:#3f6fa9;--brand-dark:#2e5688;--soft:#eaf2fc;--success:#16805b;--success-soft:#edf9f3;--danger:#bd4d46;--shadow:0 20px 55px rgba(25,58,83,.1)}*{box-sizing:border-box}html{min-width:320px;background:var(--canvas)}body{margin:0;min-height:100vh;color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;background:radial-gradient(circle at 5% 0%,rgba(63,111,169,.1),transparent 32rem),linear-gradient(140deg,#eaf3f7,#f9fcfd 60%,#eef5f6)}button{font:inherit;cursor:pointer}button:focus-visible,[tabindex]:focus-visible{outline:3px solid rgba(63,111,169,.28);outline-offset:3px}.shell{width:min(880px,calc(100% - 36px));margin:0 auto;padding:32px 0 44px}.banner{display:inline-flex;align-items:center;gap:9px;padding:8px 12px;border:1px solid #bcd4ed;border-radius:99px;background:var(--soft);color:var(--brand-dark);font-size:12px;font-weight:800}.dot{width:8px;height:8px;border-radius:50%;background:var(--brand)}.hero{display:flex;align-items:center;gap:16px;padding:28px 4px 28px}.mark{display:grid;place-items:center;width:58px;height:58px;border-radius:19px;background:var(--brand);color:#fff;font-size:25px;font-weight:900;box-shadow:0 12px 25px rgba(63,111,169,.24)}.eyebrow,.kicker{margin:0 0 7px;color:var(--brand);font-size:12px;font-weight:900;letter-spacing:.12em}.hero h1{margin:0;font-size:clamp(31px,5vw,44px);letter-spacing:-.05em}.hero h1 span{display:inline-block;margin-left:7px;padding:5px 8px;border:1px solid #bcd4ed;border-radius:99px;color:var(--brand);font-size:11px;letter-spacing:0;vertical-align:middle}.hero p:last-child{margin:9px 0 0;color:var(--muted);line-height:1.6}.card{padding:30px;border:1px solid rgba(211,226,233,.95);border-radius:23px;background:rgba(255,255,255,.94);box-shadow:var(--shadow)}.heading{display:flex;justify-content:space-between;align-items:flex-start;gap:18px}.heading h2{margin:0 0 8px;font-size:29px;letter-spacing:-.035em}.muted{margin:0;color:var(--muted);line-height:1.65}.pill{flex:none;padding:8px 11px;border-radius:99px;background:var(--soft);color:var(--brand-dark);font-size:12px;font-weight:800}.pill--success{background:var(--success-soft);color:var(--success)}.drop-zone{display:grid;place-items:center;gap:10px;margin-top:25px;padding:45px 22px;border:1.5px dashed #9ebdde;border-radius:19px;background:linear-gradient(145deg,#f3f8fd,#f9fcfe);text-align:center;transition:.18s}.drop-zone:hover,.drop-zone.is-dragging{border-color:var(--brand);background:#edf5fd}.file-icon{display:grid;place-items:center;width:54px;height:64px;border:2px solid var(--brand);border-radius:5px;color:var(--brand);font-size:20px;font-weight:900}.drop-zone strong{font-size:17px}.drop-zone small{color:var(--muted);font-size:12px}.primary,.secondary{min-height:45px;padding:11px 18px;border:0;border-radius:11px;font-weight:900}.primary{background:var(--brand);color:#fff;box-shadow:0 8px 16px rgba(63,111,169,.2)}.primary:hover{background:var(--brand-dark)}.primary:disabled{opacity:.42;cursor:not-allowed;box-shadow:none}.secondary{background:#edf3f6;color:var(--ink)}.secondary:hover{background:#e1ebef}.file-info{display:flex;align-items:center;gap:12px;margin-top:16px;padding:14px 16px;border:1px solid #bcd4ed;border-radius:13px;background:var(--soft)}.file-info strong{display:block}.file-info small{display:block;margin-top:3px;color:var(--muted)}.status{min-height:21px;margin:12px 0 0;color:var(--muted);font-size:13px}.tip{display:grid;gap:5px;margin-top:20px;padding:14px 16px;border-radius:12px;background:#f7fafb;color:var(--muted);font-size:12px;line-height:1.6}.tip b{color:var(--ink-soft)}.actions{display:flex;justify-content:flex-end;gap:10px;margin-top:24px;padding-top:20px;border-top:1px solid var(--line)}.result-card{margin-top:20px}.summary-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-top:22px}.summary-item{padding:14px;border:1px solid var(--line);border-radius:12px;background:#f7fafb}.summary-item strong{display:block;font-size:24px}.summary-item span{display:block;margin-top:4px;color:var(--muted);font-size:12px}.sheet-list{display:grid;gap:8px;margin-top:17px;padding:0;list-style:none}.sheet-list li{display:flex;justify-content:space-between;gap:12px;padding:10px 12px;border-radius:9px;background:var(--soft);color:var(--ink-soft);font-size:13px}.sheet-list b{color:var(--brand-dark)}footer{display:flex;justify-content:space-between;gap:12px;margin-top:20px;padding:0 4px;color:var(--muted);font-size:12px}footer a{color:var(--brand-dark);font-weight:800}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}@media(max-width:620px){.shell{width:min(100% - 22px,560px);padding-top:20px}.hero{align-items:flex-start;padding:24px 2px}.mark{width:48px;height:48px;border-radius:15px}.heading{display:block}.pill{display:inline-block;margin-top:14px}.card{padding:22px 20px;border-radius:18px}.summary-grid{grid-template-columns:repeat(2,1fr)}.actions{flex-direction:column}.actions button{width:100%}footer{flex-direction:column}}