:root{color-scheme:light dark;--bg: #f1f4f7;--surface: #ffffff;--surface-2: #eaf0f6;--surface-3: #dfe7f0;--text: #243345;--text-2: #526378;--text-3: #64758a;--border: #d8e0e9;--border-strong: #bfcbd9;--accent: #345aa0;--accent-soft: rgba(52, 90, 160, .09);--danger: #dc3b41;--danger-soft: rgba(220, 59, 65, .1);--success: #1f9d63;--warning: #c8811a;--primary-bg: #345aa0;--primary-fg: #ffffff;--radius-lg: 14px;--radius: 10px;--radius-sm: 8px;--shadow-sm: 0 1px 2px rgba(16, 18, 23, .05);--shadow: 0 1px 3px rgba(16, 18, 23, .06), 0 8px 24px rgba(16, 18, 23, .06);--font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;--mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;--topbar-h: 56px}@media(prefers-color-scheme:dark){:root{--bg: #131c27;--surface: #1d2937;--surface-2: #293849;--surface-3: #34465b;--text: #e6edf5;--text-2: #b6c5d6;--text-3: #9bafc5;--border: #3c4d60;--border-strong: #536980;--accent: #9bbaff;--accent-soft: rgba(155, 186, 255, .12);--danger: #f0575d;--danger-soft: rgba(240, 87, 93, .16);--success: #35b57c;--warning: #e0a03f;--primary-bg: #9bbaff;--primary-fg: #172c4c;--shadow-sm: 0 1px 2px rgba(0, 0, 0, .4);--shadow: 0 1px 3px rgba(0, 0, 0, .5), 0 8px 24px rgba(0, 0, 0, .35)}}*,*:before,*:after{box-sizing:border-box}[hidden]{display:none!important}html,body{margin:0;padding:0}body{font-family:var(--font);background:var(--bg);color:var(--text);-webkit-font-smoothing:antialiased;-webkit-tap-highlight-color:transparent;line-height:1.5;touch-action:manipulation}h1,h2,h3,p{margin:0}a{color:inherit;text-decoration:none}.btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;padding:0 18px;min-height:44px;border:1px solid transparent;border-radius:var(--radius-sm);background:var(--surface-2);color:var(--text);font-family:inherit;font-size:14px;font-weight:600;cursor:pointer;transition:filter .14s ease,transform .1s ease,background .14s ease,border-color .14s ease,opacity .14s ease;white-space:nowrap;-webkit-user-select:none;user-select:none;touch-action:manipulation}.btn:hover:not(:disabled){filter:brightness(.97)}@media(prefers-color-scheme:dark){.btn:hover:not(:disabled){filter:brightness(1.15)}}.btn:active:not(:disabled){transform:scale(.975)}.btn:disabled{opacity:.45;cursor:not-allowed}.btn:focus-visible{outline:2px solid var(--accent);outline-offset:2px}.btn--primary,.btn--accent{background:var(--primary-bg);color:var(--primary-fg)}.btn--ghost{background:transparent;border-color:var(--border-strong)}.btn--danger{background:transparent;border-color:var(--danger);color:var(--danger)}.btn--block{width:100%}.btn--lg{height:50px;font-size:15px;border-radius:var(--radius)}.btn--sm{height:36px;padding:0 13px;font-size:13px}.input{width:100%;height:44px;padding:0 14px;border:1px solid var(--border-strong);border-radius:var(--radius-sm);background:var(--surface);color:var(--text);font-family:inherit;font-size:16px;transition:border-color .14s ease,box-shadow .14s ease}.input::placeholder{color:var(--text-3)}.input:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-soft)}.input--code{font-family:var(--mono);font-size:18px;font-weight:700;letter-spacing:.22em;text-transform:uppercase;text-align:center;padding-left:.22em}.card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius-lg);box-shadow:var(--shadow-sm)}.topbar{height:var(--topbar-h);display:flex;align-items:center;gap:12px;padding:0 18px;border-bottom:1px solid var(--border);background:color-mix(in srgb,var(--surface) 82%,transparent);backdrop-filter:saturate(1.6) blur(12px);-webkit-backdrop-filter:saturate(1.6) blur(12px);position:sticky;top:0;z-index:20}.topbar__brand{display:flex;align-items:center;gap:9px;font-weight:700;font-size:15px;letter-spacing:-.01em}.topbar__mark{width:26px;height:26px;border-radius:8px;background:var(--primary-bg);display:grid;place-items:center;flex:none}.topbar__spacer{flex:1}.iconlink{display:inline-flex;align-items:center;gap:6px;min-height:44px;padding:0 11px;border-radius:var(--radius-sm);color:var(--text-2);font-size:13.5px;font-weight:600;transition:background .14s ease,color .14s ease}.iconlink:hover{background:var(--surface-2);color:var(--text)}.chip{display:inline-flex;align-items:center;gap:7px;height:30px;padding:0 11px;border-radius:999px;background:var(--surface-2);color:var(--text-2);font-size:12.5px;font-weight:600}.chip--code{font-family:var(--mono);letter-spacing:.14em;font-size:13.5px;color:var(--text);background:var(--surface-2)}button.chip--code{min-height:44px;cursor:pointer}.iconlink:focus-visible,button.chip--code:focus-visible{outline:2px 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scale(.96)}}.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}.hidden{display:none!important}@media(prefers-reduced-motion:reduce){*{animation-duration:.01ms!important;transition-duration:.01ms!important}}