:root{--ink: #182848;--ink-soft: #555f71;--paper: #f3f5f7;--surface: #ffffff;--line: #dbdfe7;--line-strong: #838b9b;--line-dark: #546483;--brand: #4581ef;--brand-text: #1249b8;--brand-deep: #0d3a96;--flame: #ea580c;--flame-wash: #fff2e8;--shell: #0f141c;--on-shell: #eff1f6;--on-shell-strong: #dadfea;--on-shell-soft: #b6becb;--on-shell-faint: #8c95a5;--danger: #b91c1c;--font-sans: system-ui, -apple-system, "PingFang TC", "Noto Sans TC", "Microsoft JhengHei", sans-serif;--font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, monospace;--r-sm: 8px;--r-md: 14px;--r-lg: 22px;--tap: 48px;--edge: 18px;--dur: .18s;--ease: cubic-bezier(.2, .7, .3, 1)}*{box-sizing:border-box}html,body,#root{height:100%}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--font-sans);font-size:1rem;line-height:1.5;-webkit-text-size-adjust:100%;overscroll-behavior-y:none}button{font:inherit;color:inherit;cursor:pointer}:focus-visible{outline:3px solid 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.foot{background:linear-gradient(to top,var(--shell) 68%,rgba(15,20,28,0))}h1{margin:0 0 8px;font-size:1.5625rem;line-height:1.25;font-weight:800;letter-spacing:-.02em}.h1--tight{font-size:1.25rem;margin-bottom:6px}h2{margin:0 0 6px;font-size:1.0625rem;font-weight:700;letter-spacing:-.01em}p{margin:0 0 14px;color:var(--ink-soft)}.screen--dark p{color:var(--on-shell-soft)}.brand{color:var(--brand-text);margin-bottom:14px}.eyebrow{font-family:var(--font-mono);font-size:.75rem;letter-spacing:.1em;text-transform:uppercase;color:var(--brand-text);margin-bottom:10px}.btn{display:flex;align-items:center;justify-content:center;gap:8px;width:100%;min-height:54px;padding:0 20px;border:1px solid transparent;border-radius:var(--r-md);background:var(--brand-deep);color:#fff;font-weight:700;letter-spacing:-.01em;transition:transform var(--dur) var(--ease),background var(--dur) 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video{position:absolute;top:0;right:0;bottom:0;left:0;width:100%;height:100%;object-fit:cover}.guide{position:absolute;left:5%;right:5%;aspect-ratio:186 / 32;border:2px solid rgba(255,255,255,.92);border-radius:6px;box-shadow:0 0 0 100vmax #040c0a8c}.guide--square{aspect-ratio:1;left:16%;right:16%}.guide .corner{color:var(--flame);width:15px;height:15px}.guide .corner--tl{top:-8px;left:-8px}.guide .corner--tr{top:-8px;right:-8px}.guide .corner--bl{bottom:-8px;left:-8px}.guide .corner--br{bottom:-8px;right:-8px}.guide__hint{position:absolute;left:0;right:0;top:calc(100% + 14px);text-align:center;color:#fff;font-weight:600;font-size:.9375rem;text-shadow:0 1px 6px rgba(0,0,0,.6)}.shutter{display:block;width:76px;height:76px;margin:0 auto;border-radius:50%;border:4px solid rgba(255,255,255,.9);background:#fff;box-shadow:0 0 0 3px #00000059}.shutter:disabled{opacity:.4}.tally{display:flex;align-items:baseline;gap:8px;padding:10px var(--edge);border-bottom:1px solid 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