:root{color-scheme:light;font-family:Segoe UI,PingFang SC,Hiragino Sans GB,Microsoft YaHei,sans-serif;--bg: #f4f8f8;--bg-soft: #eef5f4;--panel: rgba(255, 255, 255, .9);--panel-strong: #ffffff;--line: rgba(124, 156, 153, .18);--line-strong: rgba(92, 139, 132, .22);--text: #243433;--muted: #667876;--accent: #63a7a1;--accent-strong: #7bb8df;--accent-soft: rgba(99, 167, 161, .12);--danger: #c86d6d;--danger-soft: rgba(200, 109, 109, .12);--shadow: 0 18px 48px rgba(36, 52, 51, .08);--shadow-soft: 0 10px 28px rgba(36, 52, 51, .05)}*{box-sizing:border-box}html,body,#root{min-height:100%}body{margin:0;background:radial-gradient(circle at top left,rgba(123,184,223,.14),transparent 24%),linear-gradient(180deg,#f8fbfb 0%,var(--bg) 100%);color:var(--text)}.shell{width:min(1180px,calc(100% - 48px));margin:0 auto;padding:32px 0 56px}.hero-panel,.viewer-card,.action-panel,.debug-panel{border:1px solid var(--line);background:var(--panel);box-shadow:var(--shadow-soft)}.hero-panel{display:flex;align-items:end;justify-content:space-between;gap:24px;padding:28px 30px;border-radius:28px;margin-bottom:24px}.eyebrow,.panel-label{margin:0 0 12px;letter-spacing:.12em;text-transform:uppercase;color:var(--accent);font-size:.78rem;font-weight:600}.hero-copy h1,.viewer-head h2,.action-copy h2{margin:0;font-weight:700;letter-spacing:.01em}.hero-copy h1{font-size:clamp(2.1rem,4vw,3.5rem);line-height:1.08}.lede,.viewer-subtitle,.action-copy p,.viewer-note,.hint-box,.field span,.info-blocks p{color:var(--muted);line-height:1.7}.lede{max-width:56ch;margin:14px 0 0}.status-chip{display:inline-flex;align-items:center;gap:10px;padding:12px 16px;border-radius:999px;border:1px solid transparent;background:#f8fcfc;font-size:.92rem;font-weight:600;white-space:nowrap}.status-dot{width:10px;height:10px;border-radius:999px;background:currentColor}.status-connecting{color:#8a7a49;border-color:#8a7a492e;background:#fffaf0}.status-live{color:#4c8c79;border-color:#4c8c792e;background:#f2fbf7}.status-error{color:var(--danger);border-color:#c86d6d33;background:#fff7f7}.stage-panel{display:grid;gap:20px}.viewer-card,.action-panel,.debug-panel{border-radius:28px;padding:24px}.viewer-card-prominent{padding:28px}.viewer-head{display:flex;justify-content:space-between;gap:18px;align-items:start}.viewer-head-stack{flex-direction:column;margin-bottom:18px}.viewer-subtitle,.action-copy p{margin:8px 0 0;max-width:64ch}.video-wrap{position:relative;border-radius:24px;overflow:hidden;aspect-ratio:16 / 9;border:1px solid var(--line-strong);background:linear-gradient(180deg,#dfeaea,#cfdede);box-shadow:var(--shadow)}.video{width:100%;height:100%;display:block;object-fit:contain;background:#0f1a1c}.video-placeholder{position:absolute;top:0;right:0;bottom:0;left:0;display:grid;place-content:center;justify-items:center;gap:14px;padding:24px;text-align:center;background:linear-gradient(180deg,#fafcfcbd,#eaf3f2e0)}.video-placeholder strong{font-size:1.12rem}.video-placeholder p{margin:0;max-width:34ch;color:var(--muted);line-height:1.7}.placeholder-badge{padding:8px 14px;border-radius:999px;background:#ffffffe0;border:1px solid rgba(99,167,161,.18);color:var(--accent);font-size:.88rem;font-weight:600}.video-overlay{position:absolute;inset:auto 18px 18px 18px;display:flex;justify-content:space-between;gap:10px;flex-wrap:wrap;transition:opacity .22s ease,transform .22s ease}.video-overlay-visible{opacity:1;transform:translateY(0)}.video-overlay-hidden{opacity:0;transform:translateY(8px);pointer-events:none}.video-overlay span{padding:8px 12px;border-radius:999px;background:#ffffffb8;border:1px solid rgba(92,139,132,.14);color:var(--text);font-size:.8rem;font-weight:600;-webkit-backdrop-filter:blur(6px);backdrop-filter:blur(6px)}.actions{display:grid;grid-template-columns:1fr 1fr;gap:12px}.actions-wide{max-width:520px}input,button{font:inherit}button{cursor:pointer;border-radius:999px;padding:14px 18px;border:1px solid transparent;font-size:.96rem;font-weight:600;transition:transform .14s ease,box-shadow .14s ease,background-color .14s ease}button:hover:not(:disabled){transform:translateY(-1px);box-shadow:0 10px 20px #24343314}button:disabled,input:disabled{opacity:.62;cursor:not-allowed}.primary{background:linear-gradient(135deg,#78bbb3,#8bc4ea);color:#fff}.secondary{background:#fff;border-color:#63a7a133;color:var(--text)}.action-panel{display:grid;gap:18px;align-content:start}.debug-panel{padding:0;overflow:hidden}.debug-panel summary{cursor:pointer;list-style:none;padding:20px 24px;font-weight:600}.debug-panel summary::-webkit-details-marker{display:none}.debug-panel summary:after{content:"展开";float:right;color:var(--muted);font-size:.9rem;font-weight:500}.debug-panel[open] summary:after{content:"收起"}.debug-content{display:grid;gap:20px;padding:0 24px 24px;border-top:1px solid rgba(92,139,132,.12)}.debug-section{display:grid;gap:14px}.debug-section h3{margin:0;font-size:1rem}.debug-fields{display:grid;gap:14px}.field{display:grid;gap:10px}.field span{font-size:.92rem}input{width:100%;border:1px solid rgba(99,167,161,.16);background:#fff;color:var(--text);padding:14px 16px;border-radius:18px;outline:none}input:focus{border-color:#63a7a180;box-shadow:0 0 0 4px #63a7a114}.info-blocks{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}.info-blocks-engineering{grid-template-columns:repeat(3,minmax(0,1fr))}.info-blocks article,.error-box,.hint-box,.proxy-checklist,.raw-stats-block{border-radius:20px;padding:16px;border:1px solid rgba(99,167,161,.12);background:#ffffffc7}.info-blocks p{margin:0 0 8px;font-size:.86rem}.info-blocks strong,.hint-box{line-height:1.7}.proxy-checklist,.raw-stats-block{color:var(--muted);line-height:1.7;max-height:240px;overflow:auto}.proxy-checklist p,.raw-stats-block{margin:0;font-family:SFMono-Regular,Consolas,Liberation Mono,Menlo,monospace;font-size:.84rem}.proxy-checklist p{margin-bottom:8px}.raw-stats-block{white-space:pre-wrap;word-break:break-word}.error-box{color:#9b5050;border-color:#c86d6d33;background:var(--danger-soft);line-height:1.6;word-break:break-word}.error-box-judge{margin-top:18px}@media(max-width:980px){.hero-panel,.viewer-head{flex-direction:column;align-items:start}.status-chip{white-space:normal}}@media(max-width:640px){.shell{width:min(100% - 24px,1180px);padding-top:24px}.hero-panel,.viewer-card,.action-panel,.debug-panel{border-radius:22px}.hero-panel,.viewer-card,.action-panel{padding:18px}.debug-panel summary,.debug-content{padding-left:18px;padding-right:18px}.debug-content{padding-bottom:18px}.actions,.info-blocks,.info-blocks-engineering{grid-template-columns:1fr}.video-overlay{inset:auto 12px 12px 12px}}