.app-header{border-bottom:1px solid var(--border);background:#ffffffb8;-webkit-backdrop-filter:blur(8px);backdrop-filter:blur(8px);position:sticky;top:0;z-index:10}.app-header-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;width:100%;max-width:1180px;margin:0 auto;padding:8px 22px}@media (max-width: 720px){.app-header-inner{padding:8px 14px}}.brand{display:flex;align-items:center;gap:8px}.brand-home{-webkit-appearance:none;-moz-appearance:none;appearance:none;border:none;background:none;padding:0;margin:0;cursor:pointer;display:inline-flex;align-items:center;border-radius:6px}.brand-home:hover{opacity:.7}.brand-home:focus-visible{outline:2px solid var(--accent, #2563eb);outline-offset:3px}.brand-mark{height:40px;width:auto;display:block;color:var(--text)}.app-header-actions{display:flex;align-items:center;gap:10px}.app-nav-link{display:inline-flex;align-items:center;gap:6px;height:36px;padding:6px 11px;font-size:13px;font-weight:600;color:var(--text-dim);text-decoration:none;background-color:transparent;border:1px solid var(--border-strong);border-radius:9px;transition:all .12s ease}.app-nav-link:hover{color:var(--text);border-color:var(--text-dim)}.app-nav-link:focus-visible{outline:2px solid var(--accent, #2563eb);outline-offset:1px}.lang-switcher{-webkit-appearance:none;-moz-appearance:none;appearance:none;display:inline-flex;align-items:center;gap:6px;padding:6px 11px;height:36px;font-size:13px;font-weight:600;color:var(--text-dim);background-color:transparent;border:1px solid var(--border-strong);border-radius:9px;cursor:pointer;transition:all .12s ease}.lang-switcher-code{line-height:1}.lang-switcher:hover{color:var(--text);border-color:var(--text-dim)}.lang-switcher:focus-visible{outline:2px solid var(--accent, #2563eb);outline-offset:1px}.app-footer{width:100%;max-width:1180px;margin:0 auto;padding:12px 22px 24px;display:flex;align-items:center;justify-content:center;gap:10px}.app-footer-credit{font-size:12px;color:var(--text-muted)}.app-footer-credit a{color:var(--text-dim);text-decoration:none}.app-footer-credit a:hover{text-decoration:underline}.app-version{font-size:11px;color:var(--text-muted);font-family:var(--mono)}@media (max-width: 720px){.app-footer{padding:10px}}:root{--bg: #f4f6fa;--bg-elev: #ffffff;--surface: #ffffff;--surface-2: #eef1f6;--border: rgba(15, 23, 42, .1);--border-strong: rgba(15, 23, 42, .18);--text: #1a2233;--text-dim: #5b6472;--text-muted: #9aa3b2;--long: #089981;--long-dim: rgba(8, 153, 129, .12);--short: #f23645;--short-dim: rgba(242, 54, 69, .12);--skip: #6b7280;--accent: #2563eb;--accent-dim: rgba(37, 99, 235, .1);--warn: #d97706;--radius: 12px;--radius-sm: 8px;--gap: 16px;--shadow: 0 6px 22px rgba(15, 23, 42, .08);--font: "Inter", "Segoe UI", system-ui, -apple-system, "Noto Sans TC", "Microsoft JhengHei", sans-serif;--mono: "JetBrains Mono", "SF Mono", "Consolas", monospace}*{box-sizing:border-box}html,body,#root{height:100%;margin:0}html{touch-action:manipulation}body{background:radial-gradient(1200px 600px at 50% -10%,#ffffff 0%,transparent 65%),var(--bg);color:var(--text);font-family:var(--font);-webkit-font-smoothing:antialiased;text-rendering:optimizeLegibility}button,input,select{font-family:inherit}h1,h2,h3,h4{margin:0;font-weight:700;letter-spacing:-.01em}a{color:var(--accent)}.btn{-webkit-appearance:none;-moz-appearance:none;appearance:none;border:1px solid var(--border-strong);background:var(--surface-2);color:var(--text);padding:12px 18px;border-radius:var(--radius-sm);font-size:15px;font-weight:600;cursor:pointer;transition:transform .06s ease,filter .15s ease,background .15s ease,border-color .15s ease}.btn:hover:not(:disabled){filter:brightness(1.12)}.btn:active:not(:disabled){transform:translateY(1px)}.btn:disabled{opacity:.4;cursor:not-allowed}.btn-primary{background:var(--accent);border-color:transparent;color:#fff}.btn-lg{padding:15px 26px;font-size:16px}.btn-block{width:100%}.btn-ghost{background:transparent;border-color:var(--border);color:var(--text-dim)}.btn-long{background:var(--long-dim);border-color:var(--long);color:var(--long)}.btn-short{background:var(--short-dim);border-color:var(--short);color:var(--short)}.btn-skip{background:transparent;border-color:var(--border-strong);color:var(--text-dim)}.btn-long.is-active{background:var(--long);color:#fff}.btn-short.is-active{background:var(--short);color:#fff}.btn-skip.is-active{background:var(--skip);color:#fff;border-color:var(--skip)}.panel{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);box-shadow:var(--shadow)}.card{background:var(--bg-elev);border:1px solid 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button{-webkit-appearance:none;-moz-appearance:none;appearance:none;border:1px solid var(--border-strong);background:#ffffffe6;color:var(--text-dim);font-size:12px;font-weight:600;padding:4px 9px;border-radius:6px;cursor:pointer}.chart-draw-toolbar button:hover{color:var(--text);border-color:var(--text-dim)}.chart-draw-toolbar button.is-active{background:var(--accent);border-color:var(--accent);color:#fff}@media (max-width: 880px){.chart-draw-toolbar{display:none}}.spinner{width:28px;height:28px;border:3px solid var(--border-strong);border-top-color:var(--accent);border-radius:50%;animation:spin .7s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}.fade-in{animation:fadeIn .25s ease}@keyframes fadeIn{0%{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}@media (prefers-reduced-motion: reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important;scroll-behavior:auto!important}}