:root{color-scheme:light;--bg: #f6f0e7;--paper: rgba(255, 251, 247, .9);--paper-strong: #fffdfa;--ink: #1f1f1a;--muted: #6e665a;--line: rgba(58, 48, 33, .14);--accent: #0f7b6c;--accent-strong: #0b5d52;--shadow: 0 30px 80px rgba(55, 41, 23, .12)}*{box-sizing:border-box}body{margin:0;min-height:100vh;color:var(--ink);font-family:Iowan Old Style,"Noto Serif SC","Source Han Serif SC",serif;background:radial-gradient(circle at top left,rgba(15,123,108,.14),transparent 28%),radial-gradient(circle at top right,rgba(176,117,39,.12),transparent 24%),linear-gradient(180deg,#fbf6ee 0%,var(--bg) 100%)}.shell{width:min(1240px,calc(100vw - 32px));margin:0 auto;padding:40px 0 56px}.hero{padding:24px 8px 28px}.eyebrow{margin:0 0 10px;color:var(--accent-strong);font-size:.82rem;font-weight:700;letter-spacing:.18em;text-transform:uppercase}.hero h1{margin:0;font-size:clamp(2.2rem,4.2vw,4.4rem);line-height:.96;letter-spacing:-.04em}.lede{max-width:720px;margin:18px 0 0;color:var(--muted);font-size:1.05rem;line-height:1.7}.layout{display:grid;grid-template-columns:380px minmax(0,1fr);gap:22px}.panel{border:1px solid var(--line);border-radius:28px;background:var(--paper);box-shadow:var(--shadow);-webkit-backdrop-filter:blur(18px);backdrop-filter:blur(18px)}.upload-panel,.result-panel{padding:22px}.panel-head h2{margin:0;font-size:1.5rem}.panel-head p{margin:8px 0 0;color:var(--muted);line-height:1.6}.dropzone{display:grid;gap:8px;margin-top:20px;padding:28px 20px;border:1.5px dashed rgba(15,123,108,.4);border-radius:22px;background:linear-gradient(180deg,#0f7b6c0f,#ffffffb8);cursor:pointer}.dropzone input{display:none}.drop-title{font-size:1.12rem;font-weight:700}.drop-hint{color:var(--muted);line-height:1.6}.actions{display:flex;gap:12px;margin-top:18px}button{appearance:none;border:0;border-radius:999px;padding:13px 18px;font:inherit;cursor:pointer;transition:transform .18s ease,opacity .18s ease,background .18s ease}button:hover:not(:disabled){transform:translateY(-1px)}button:disabled{opacity:.45;cursor:not-allowed}.primary{color:#fff;background:linear-gradient(135deg,var(--accent),var(--accent-strong))}.secondary{color:var(--ink);background:var(--paper-strong);box-shadow:inset 0 0 0 1px var(--line)}.summary{display:grid;gap:14px;margin:24px 0 0}.summary div{padding:14px 16px;border-radius:18px;background:#ffffffad;box-shadow:inset 0 0 0 1px #3a302114}.summary dt{margin-bottom:6px;color:var(--muted);font-size:.9rem}.summary dd{margin:0;font-size:1rem;line-height:1.6}.preview-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px;margin-top:20px}.preview-label{margin-bottom:10px;font-weight:700}iframe{width:100%;height:72vh;border:1px solid var(--line);border-radius:20px;background:#f9f7f2}@media(max-width:960px){.layout,.preview-grid{grid-template-columns:1fr}iframe{height:60vh}}