:root{--canvas: #f7f3ea;--surface: #fffdf8;--ink: #18222d;--muted: #66717b;--line: rgba(24, 34, 45, .12);--lime: #b9f45d;--blue: #8edae5;--coral: #ff8066;--yellow: #ffd95a;--violet: #b9a7f7;--shadow: 0 18px 50px rgba(24, 34, 45, .09);--radius-lg: 32px;--radius-md: 22px;--max-width: 1180px}*{box-sizing:border-box}html{scroll-behavior:smooth;background:var(--canvas)}body{margin:0;color:var(--ink);background:radial-gradient(circle at 82% 8%,rgba(185,244,93,.2),transparent 24rem),var(--canvas);font-family:Inter,PingFang TC,Noto Sans TC,Microsoft JhengHei,system-ui,sans-serif;font-size:16px;line-height:1.65;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button,a{-webkit-tap-highlight-color:transparent}:focus-visible{outline:3px solid var(--coral);outline-offset:4px}.container{width:min(calc(100% - 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p{margin-bottom:0;font-size:.9rem}.site-footer{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:138px;color:var(--muted);font-size:.9rem}.footer-note{max-width:600px;text-align:right}@media(max-width:900px){.hero{grid-template-columns:1fr;min-height:auto;padding-top:64px}.city-card{min-height:430px}.section-heading,.principles-inner{grid-template-columns:1fr}.section-heading{display:grid}.principles-grid{grid-template-columns:1fr}}@media(max-width:680px){.container{width:min(calc(100% - 28px),var(--max-width))}.site-header{min-height:72px}.site-nav a:not(.nav-cta){display:none}.hero{gap:46px;padding:52px 0 68px}h1{font-size:clamp(3rem,16vw,4.5rem)}.city-card{min-height:360px;border-radius:30px}.city-label{top:20px;left:20px}.section{padding:70px 0}.tools-grid{grid-template-columns:1fr}.tool-card:first-child{grid-column:auto}.tool-card{min-height:255px;padding:24px;border-radius:26px}.principles{border-radius:30px}.principles-inner{padding:40px 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var(--ink);border-radius:8px;background:var(--coral);animation:car-drive 4.5s linear infinite}.tunnel-two span{animation-delay:-1.4s;background:var(--lime)}.tunnel-three span{animation-delay:-2.7s;background:var(--violet)}@keyframes car-drive{0%{left:3%}to{left:83%}}.illustration-label{position:absolute;right:24px;bottom:24px;padding:12px 15px;border:2px solid var(--ink);border-radius:14px;background:var(--surface);box-shadow:4px 4px 0 var(--ink);font-size:.82rem;font-weight:850;line-height:1.25}.tool-workspace{margin-bottom:72px;padding:clamp(24px,4vw,48px);border:1px solid var(--line);border-radius:38px;background:var(--surface);box-shadow:var(--shadow)}.workspace-heading{display:flex;align-items:center;justify-content:space-between;gap:24px;margin-bottom:28px}.workspace-heading 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