:root{--bg: #f8fafc;--surface: #ffffff;--surface-strong: #f1f5f9;--ink: #111827;--muted: #64748b;--line: #d9e2ec;--line-strong: #b8c4d2;--teal: #0f766e;--teal-strong: #115e59;--amber: #b45309;--shadow: 0 22px 60px rgba(15, 23, 42, .1);--radius: 8px;color-scheme:light}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:Avenir Next,Noto Sans TC,PingFang TC,Microsoft JhengHei,sans-serif;line-height:1.65}a{color:inherit;text-decoration:none}a:hover{color:var(--teal)}button,input,textarea{font:inherit}button{cursor:pointer}svg{display:block}.container{width:min(1120px,calc(100% - 32px));margin-inline:auto}.skip-link{position:fixed;top:12px;left:12px;z-index:20;transform:translateY(-160%);padding:8px 12px;border-radius:var(--radius);background:var(--ink);color:#fff}.skip-link:focus{transform:translateY(0)}.site-header{position:sticky;top:0;z-index:10;border-bottom:1px solid 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auto;min-height:560px}.panel-heading{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;padding:18px;border-bottom:1px solid var(--line)}.panel-heading h2{margin:0;font-size:1.2rem}.panel-heading p{margin:4px 0 0;color:var(--muted);font-size:.92rem}.toolbar{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:8px;max-width:440px}.icon-button,.copy-button{display:inline-flex;min-height:40px;align-items:center;justify-content:center;gap:8px;border:1px solid var(--line-strong);border-radius:var(--radius);background:#fff;color:var(--ink);font-weight:800}.icon-button{min-width:82px;padding:8px 10px}.icon-button[hidden]{display:none}.icon-button svg,.copy-button svg{width:18px;height:18px;fill:none;stroke:currentColor;stroke-linecap:round;stroke-linejoin:round;stroke-width:2}.icon-button:hover,.copy-button:hover{border-color:var(--teal);color:var(--teal)}textarea{width:100%;min-height:100%;resize:vertical;border:0;border-radius:0;outline:none;padding:22px;background:linear-gradient(rgba(15,118,110,.035) 1px,transparent 1px),#fff;background-size:100% 32px;color:var(--ink);font-family:SFMono-Regular,Cascadia Code,Noto Sans Mono CJK TC,monospace;font-size:1rem;line-height:2}.editor-footer{display:flex;min-height:48px;align-items:center;gap:8px 18px;padding:10px 18px;border-top:1px solid var(--line);color:var(--muted);font-size:.9rem;font-weight:800}.editor-footer strong{color:var(--ink)}textarea:focus-visible,input:focus-visible,button:focus-visible,a:focus-visible{outline:3px solid rgba(20,184,166,.35);outline-offset:2px}.stats-panel{padding:18px}.speed-control,.target-control{display:grid;gap:8px;margin-bottom:16px}.speed-control label,.control-label,.target-inputs label{color:var(--muted);font-size:.86rem;font-weight:800}.control-row{display:flex;align-items:center;justify-content:space-between;gap:12px}.text-button{min-height:30px;border:0;border-radius:var(--radius);padding:4px 8px;background:transparent;color:var(--muted);font-size:.8rem;font-weight:900}.text-button:hover,.text-button:focus-visible{background:var(--surface-strong);color:var(--teal)}.speed-control div{display:grid;grid-template-columns:1fr auto;align-items:center;gap:10px}.speed-control input{min-width:0;min-height:44px;border:1px solid var(--line-strong);border-radius:var(--radius);padding:8px 10px;background:#fff}.speed-control span{color:var(--muted);font-size:.9rem}.target-inputs{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}.target-inputs label{display:grid;gap:6px}.target-inputs input{min-width:0;min-height:42px;border:1px solid var(--line-strong);border-radius:var(--radius);padding:8px 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var(--line);border-radius:var(--radius);background:var(--surface);box-shadow:var(--shadow);padding:18px}.report-score-card{min-height:220px;padding:18px;border-radius:var(--radius);background:#101820;color:#fff}.report-score-card span{display:block;color:#a7f3d0;font-size:.82rem;font-weight:900}.report-score-card strong{display:block;margin-top:10px;font-size:4rem;line-height:1}.report-score-card p{margin:10px 0 0;color:#d1fae5;font-weight:900}.report-body{display:grid;align-content:start;gap:14px}.report-summary{margin:0;color:var(--muted);font-weight:800}.report-advice-list{display:grid;gap:10px;margin:0;padding:0;list-style:none}.report-advice-list li{padding:13px 14px;border:1px solid var(--line);border-radius:var(--radius);background:var(--surface-strong);color:var(--ink);font-weight:800;line-height:1.55}.report-copy-button{margin-top:0}.info-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px;padding-bottom:40px}.info-grid article,.faq-section,.prose-page{padding:22px}.info-grid h2,.faq-section h2,.prose-page h1,.prose-page h2{margin:0;line-height:1.2}.info-grid p,.faq-section p,.prose-page p{color:var(--muted)}.faq-section{margin-bottom:52px}.faq-list{display:grid;gap:10px;margin-top:18px}details{border:1px solid var(--line);border-radius:var(--radius);background:var(--surface-strong)}summary{cursor:pointer;padding:14px 16px;font-weight:900}details p{margin:0;padding:0 16px 16px}.prose-page{max-width:820px;margin-top:52px;margin-bottom:64px}.prose-page h1{font-size:2rem}.prose-page h2{margin-top:26px;font-size:1.25rem}.prose-page a{color:var(--teal);font-weight:800}.prose-page .button-link{display:inline-flex;align-items:center;margin-top:10px;background:var(--surface-strong)}.footer{border-top:1px solid var(--line);background:#fff}.footer-grid{display:grid;grid-template-columns:minmax(0,1fr) auto;gap:24px;align-items:center;padding:28px 0}.footer p{max-width:520px;margin:10px 0 0;color:var(--muted)}.footer-links{display:flex;flex-wrap:wrap;justify-content:flex-end;gap:8px 14px;color:var(--muted);font-weight:800}@media(max-width:900px){.hero h1{font-size:2.55rem}.tool-shell,.use-case-grid,.guide-grid,.info-grid,.report-shell,.footer-grid{grid-template-columns:1fr}.footer-links{justify-content:flex-start}}@media(max-width:640px){.container{width:min(100% - 22px,1120px)}.nav{min-height:auto;flex-direction:column;align-items:flex-start;padding:14px 0}.nav-links{width:100%;overflow-x:auto;padding-bottom:2px}.hero{padding-top:34px}.hero h1{font-size:2.15rem}.hero p{font-size:1rem}.panel-heading{flex-direction:column}.toolbar{width:100%;justify-content:flex-start}.icon-button{flex:1 1 calc(50% - 8px);min-width:0}.editor-panel{min-height:480px}.editor-footer{flex-direction:column;align-items:flex-start;gap:2px}textarea{padding:16px;font-size:.95rem}.primary-stat strong{font-size:2.35rem}.stat-grid{grid-template-columns:1fr}}