:root{color-scheme:light;--page:#faf7f1;--paper:#fffefb;--ink:#233a30;--soft:#5d685f;--line:#d8ded7;--tint:#e5ece6;--accent:#2f4a3e;--sand:#f1e9dc}
*{box-sizing:border-box}body{margin:0;background:var(--page);color:var(--ink);font:16px/1.75 -apple-system,BlinkMacSystemFont,"PingFang TC","Noto Sans TC",sans-serif}a{color:var(--accent);text-underline-offset:.25em}a:hover{text-decoration-thickness:2px}button,input,select{font:inherit;color:inherit}button,a,input,select{touch-action:manipulation}button{cursor:pointer}button:disabled{cursor:wait;opacity:.6}:focus-visible{outline:3px solid #789b88;outline-offset:4px}::selection{background:#cddfd3;color:#18362a}input{caret-color:var(--accent)}[hidden]{display:none!important}.skip{position:fixed;left:12px;top:-80px;background:var(--paper);padding:12px;z-index:20}.skip:focus{top:12px}
.top{border-bottom:1px solid var(--line);background:var(--paper)}.top-inner{max-width:1180px;margin:auto;padding:16px 28px;display:flex;align-items:center;justify-content:space-between;gap:24px}.brand{font-size:22px;font-weight:700;text-decoration:none;white-space:nowrap}.brand span{font-size:14px;font-weight:600;margin-left:8px}.top nav{display:flex;gap:24px}.top nav a{font-size:14px;min-height:44px;display:flex;align-items:center}.wrap{max-width:1180px;padding:0 28px;margin:auto}.intro{padding:38px 0 20px}.intro h1{font-size:clamp(28px,3vw,36px);line-height:1.3;margin:0 0 12px;font-weight:650;letter-spacing:0}.intro p{margin:0;color:var(--soft);max-width:68ch}.search{display:flex;align-items:center;gap:16px;max-width:880px;margin:0 0 30px}.search label{white-space:nowrap;font-weight:600}.search input{width:100%;min-width:0;border:1px solid var(--line);border-radius:10px;background:var(--paper);padding:13px 16px;min-height:48px}.search input::placeholder{color:#65766b}.search button,.category-row select,#retry{min-height:44px;background:var(--paper);border:1px solid var(--line);border-radius:8px;padding:8px 12px}.search button{white-space:nowrap}.layout{display:grid;grid-template-columns:270px minmax(0,1fr);gap:48px;align-items:start}.index{position:sticky;top:20px;max-height:calc(100vh - 40px);overflow:auto;padding:0 8px 16px 0;scrollbar-color:#adbbb0 var(--page);scrollbar-width:thin}.category-row label{display:block;font-size:14px;margin-bottom:6px;font-weight:600}.category-row select{width:100%}.result-status{margin:12px 0 10px;color:var(--soft);font-size:13px}.index nav{display:flex;flex-direction:column}.lesson-link{display:block;padding:13px 12px;min-height:48px;text-decoration:none;border-bottom:1px solid var(--line);line-height:1.5}.lesson-link small{display:block;color:var(--soft);font-size:13px;margin-top:3px}.lesson-link:hover{background:#edf1eb}.lesson-link[aria-current=page]{background:var(--tint);font-weight:600;border-radius:8px}.reading{min-width:0;max-width:74ch;background:var(--paper);padding:30px 32px;border:1px solid var(--line);border-radius:14px}.reading h2{font-size:25px;line-height:1.4;margin:0 0 12px;font-weight:650}.reading h3{font-size:19px;line-height:1.5;margin:32px 0 10px}.reading p{margin:0 0 14px}.small{color:var(--soft);font-size:13px}.primary,.back-index{display:inline-flex;align-items:center;justify-content:center;min-height:44px;padding:10px 16px;border-radius:8px;text-decoration:none}.primary{background:var(--accent);color:#fff}.back-index{background:var(--paper);border:1px solid var(--line);margin-bottom:20px}.meta{font-size:14px;color:var(--soft);margin:12px 0 22px}.entry{background:var(--tint);padding:14px 16px;border-radius:10px;margin:20px 0;overflow-wrap:anywhere}.steps{list-style:none;padding:0;margin:0;counter-reset:step}.steps li{position:relative;padding:18px 0 18px 42px;border-bottom:1px solid var(--line);counter-increment:step}.steps li:before{content:counter(step);position:absolute;left:0;top:18px;color:var(--accent);font-weight:700;font-variant-numeric:tabular-nums}.steps strong{display:block;font-weight:650;margin-bottom:4px}.steps p{margin:0;color:var(--soft)}.plain-list{padding-left:22px}.plain-list li{padding:5px 0}.success{background:#edf3ee;padding:16px;border-radius:10px}.success h3{margin-top:0}.units{margin-top:30px}.units dt{font-weight:600;margin-top:18px}.units dd{margin:2px 0;color:var(--soft)}.media{margin:28px 0 20px}.media video{display:block;width:100%;aspect-ratio:9/16;max-width:440px;margin:0 auto;background:#18362a;border-radius:10px}.media p{font-size:13px;color:var(--soft);margin-top:9px}.media a{display:inline-block;min-height:44px;padding:8px 0}.shot{margin:22px 0}.shot img{display:block;width:100%;height:auto;border:1px solid var(--line);border-radius:8px}.shot figcaption{font-size:13px;color:var(--soft);margin-top:8px}.related{display:flex;flex-wrap:wrap;gap:8px 18px}.related a{min-height:44px;padding:8px 0}details{border-bottom:1px solid var(--line);padding:12px 0}summary{min-height:44px;cursor:pointer;font-weight:600}details p{color:var(--soft);padding-top:8px}footer{padding:30px 0 40px;margin-top:40px;border-top:1px solid var(--line);font-size:13px;color:var(--soft)}footer p{max-width:75ch}footer span{display:block;margin-top:12px}
@media(max-width:800px){.layout{grid-template-columns:220px minmax(0,1fr);gap:24px}.reading{padding:24px}.top nav{gap:16px}}
@media(max-width:640px){.top-inner{padding:12px 18px;align-items:flex-start;gap:12px}.top nav{flex-wrap:wrap;gap:0 12px;justify-content:flex-end}.top nav a{font-size:13px;min-height:44px}.brand{font-size:20px}.brand span{display:block;margin:0;font-size:13px}.wrap{padding:0 18px}.intro{padding:26px 0 18px}.intro h1{font-size:28px}.search{flex-wrap:wrap;gap:8px;margin-bottom:22px}.search label{width:100%}.search input{flex:1}.search button{font-size:13px;padding:8px}.layout{display:block}.index{position:static;max-height:none;padding:0}.reading{margin-top:24px;padding:22px 18px;max-width:none}.reading h2{font-size:23px}.has-lesson .index{display:none}.has-lesson .reading{margin-top:0}.browse .reading{display:none}.entry{font-size:14px}.steps li{padding-left:32px}.reading h3{font-size:18px}.lesson-link{padding:16px 10px}.media{margin-top:24px}footer{margin-top:28px}}
@media(prefers-reduced-motion:reduce){*{scroll-behavior:auto!important;animation:none!important;transition:none!important}}

.media .video-caption{font-size:18px;line-height:1.65;color:var(--ink);background:var(--tint);padding:12px 14px;border-left:3px solid var(--accent);border-radius:6px;overflow-wrap:anywhere}