:root{--bg:#071321;--surface:#0d1c2c;--surface2:#112438;--line:#26384d;--ink:#edf4fa;--muted:#8fa1b5;--accent:#ff8b2b;--accent2:#ffad4d;--ok:#4ccf9b;--warn:#f4b84a;--bad:#f17272;font-family:Inter,"PingFang SC","Microsoft YaHei",system-ui,sans-serif;color:var(--ink);background:var(--bg)}*{box-sizing:border-box}body{margin:0;background:radial-gradient(circle at 50% -20%,#18334c,transparent 45%),var(--bg);min-height:100vh}button,input,textarea,select{font:inherit}.hidden{display:none!important}.topbar{max-width:760px;margin:auto;padding:calc(18px + env(safe-area-inset-top)) 20px 16px;display:flex;justify-content:space-between;align-items:center}.brand,.eyebrow{display:block;color:var(--accent2);font-size:11px;letter-spacing:.13em;font-weight:700}.topbar h1{font-size:18px;margin:5px 0 0;font-weight:600}.shell{max-width:760px;margin:auto;padding:0 14px calc(94px + env(safe-area-inset-bottom))}.login-card,.session-card,.upload-card,.q-card,.history-tools{background:rgba(13,28,44,.94);border:1px solid var(--line);border-radius:17px;box-shadow:0 18px 42px rgba(0,0,0,.2)}.login-card{padding:24px;max-width:420px;margin:70px auto}.login-card h2{margin:0}.login-card p{color:var(--muted)}form{display:grid;gap:10px}input,textarea,select{width:100%;background:#091827;border:1px solid var(--line);color:var(--ink);border-radius:10px;padding:12px}button{border:0;cursor:pointer}.primary,.secondary,.icon-button{border-radius:10px;font-weight:650}.primary{color:#1a1209;background:var(--accent);padding:13px 16px}.secondary{color:var(--ink);background:transparent;border:1px solid var(--line);padding:10px 13px}.icon-button{background:#17283a;color:var(--ink);padding:10px 13px}.session-card{padding:17px;margin-bottom:14px}.session-head{display:flex;align-items:start;justify-content:space-between;gap:10px}.session-head h2{font-size:17px;margin:4px 0 0}.metrics{display:grid;grid-template-columns:repeat(4,1fr);margin:18px 0;border-top:1px solid var(--line);border-bottom:1px solid var(--line);padding:12px 0}.metrics div{text-align:center;border-right:1px solid var(--line)}.metrics div:last-child{border:0}.metrics b{display:block;font-size:16px;color:var(--ink);font-variant-numeric:tabular-nums}.metrics span{font-size:11px;color:var(--muted);margin-top:4px;display:block}.status{white-space:nowrap;border-radius:999px;padding:5px 9px;font-size:11px;font-weight:650;background:#1b2d40;color:var(--muted)}.status.finalized,.status.ocr_completed{background:rgba(76,207,155,.14);color:var(--ok)}.status.disputed,.status.waiting_confirmation{background:rgba(244,184,74,.14);color:var(--warn)}.status.failed{background:rgba(241,114,114,.14);color:var(--bad)}.upload-card{overflow:hidden;margin-bottom:20px}.upload-button{border:0;width:100%;min-height:100px;display:flex;gap:15px;align-items:center;text-align:left;padding:20px;background:linear-gradient(135deg,rgba(255,139,43,.18),rgba(255,139,43,.05));color:var(--ink)}.upload-button b{display:block;font-weight:600;font-size:15px}.upload-button small{display:block;color:var(--muted);margin-top:6px}.camera{font-size:28px;color:var(--accent)}.file-input{position:absolute;width:1px;height:1px;opacity:0}.preview-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;padding:10px}.preview-grid img{width:100%;aspect-ratio:1;object-fit:cover;border-radius:8px}.workflow-picker{margin:2px 12px 10px;border:1px solid var(--line);border-radius:11px;padding:8px}.workflow-picker legend{color:var(--muted);font-size:11px}.workflow-picker label{display:block;font-size:13px;padding:6px;color:var(--muted)}.workflow-picker input{width:auto}.wide{width:calc(100% - 24px);margin:2px 12px 14px}.section-title{display:flex;justify-content:space-between;align-items:center;margin:18px 2px 9px}.section-title h2{font-size:15px;margin:0}.section-title span{font-size:13px;color:var(--muted)}.question-list{display:grid;gap:10px}.q-card{padding:14px 15px}.q-head{display:flex;align-items:center;gap:8px}.q-head strong{font-size:15px}.q-head .status{margin-left:auto}.q-summary{display:grid;grid-template-columns:70px 1fr;gap:13px;margin-top:13px}.answer-letter{font-size:43px;line-height:1;color:var(--accent);font-weight:650}.answer-letter.empty{color:var(--muted)}.q-copy{font-size:13px;color:var(--muted);line-height:1.45;white-space:pre-wrap;overflow:hidden;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical}.timing{margin-top:12px;padding-top:11px;border-top:1px solid var(--line);display:flex;flex-wrap:wrap;gap:6px 12px;color:var(--muted);font-size:11px}.timing b{color:#c9d8e6;font-weight:600}.q-actions{margin-top:12px;display:flex;gap:8px}.q-actions button{flex:1;padding:9px;color:#c7d7e6;background:#14263a;border:1px solid var(--line);border-radius:8px;font-size:12px}.notice{margin-top:12px;background:rgba(244,184,74,.12);color:var(--warn);border:1px solid rgba(244,184,74,.28);padding:9px;border-radius:8px;font-size:12px}.history-tools{padding:12px;display:grid;grid-template-columns:1fr 110px;gap:8px;margin-bottom:14px}.history-tools button{grid-column:1/-1}.bottom-nav{position:fixed;bottom:0;left:0;right:0;padding:8px max(14px,env(safe-area-inset-left)) calc(8px + env(safe-area-inset-bottom));display:grid;grid-template-columns:1fr 1fr;background:rgba(7,19,33,.96);border-top:1px solid var(--line);backdrop-filter:blur(16px)}.bottom-nav button{background:none;color:var(--muted);font-size:20px;padding:3px}.bottom-nav span{display:block;font-size:10px;margin-top:3px}.bottom-nav button.active{color:var(--accent)}.sheet{position:fixed;inset:0;z-index:10}.sheet-backdrop{position:absolute;inset:0;background:rgba(0,0,0,.65)}.sheet-panel{position:absolute;inset:auto 0 0;max-height:92vh;overflow:auto;background:#0b1a2a;border-radius:22px 22px 0 0;border-top:1px solid var(--line);padding:22px 16px calc(28px + env(safe-area-inset-bottom))}.close{float:right;font-size:26px;color:var(--muted);background:none}.detail-title{margin:0 0 16px;font-size:20px}.detail-image{width:100%;max-height:360px;object-fit:contain;background:#05101c;border-radius:12px;margin:8px 0}.detail-section{margin:18px 0;padding:14px;background:var(--surface);border:1px solid var(--line);border-radius:12px}.detail-section h3{margin:0 0 9px;font-size:13px;color:var(--muted);font-weight:550}.raw{white-space:pre-wrap;line-height:1.55;font-size:13px;color:#dce7f0}.copy-button{margin-top:10px;color:var(--accent2);background:transparent;border:1px solid #5f4329;border-radius:8px;padding:8px 10px;font-size:12px}.detail-section textarea{min-height:150px;line-height:1.5}.detail-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:8px}.detail-grid div{background:#102338;padding:10px;border-radius:9px;font-size:12px;color:var(--muted)}.detail-grid b{display:block;color:var(--ink);margin-top:4px}.toast{position:fixed;left:50%;bottom:86px;transform:translate(-50%,20px);opacity:0;background:#edf4fa;color:#102030;border-radius:999px;padding:10px 16px;font-size:13px;transition:.2s;z-index:20}.toast.show{opacity:1;transform:translate(-50%,0)}@media(min-width:760px){.sheet-panel{left:50%;right:auto;width:600px;transform:translateX(-50%);border-radius:22px}.bottom-nav{left:50%;right:auto;width:760px;transform:translateX(-50%);border-left:1px solid var(--line);border-right:1px solid var(--line)}}