/* 由 lesson.html 內嵌樣式抽出（v7），為了移除 CSP 的 unsafe-inline。順序與原頁面相同。 */
/* 觸控與鍵盤可及性：保留返回連結位置，補足 44px 目標高度。 */
.navright a{min-height:44px;display:inline-flex;align-items:center}
:root{--ink:#16243d;--muted:#65738b;--paper:#f6f8fc;--line:#e1e8f1;--navy:#1d3557;--blue:#2d6cdf;--orange:#f28c28;--teal:#159780;--white:#fff;--soft:#eef4ff;font-family:"Noto Sans TC","Microsoft JhengHei",sans-serif}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-size:16px;line-height:1.75}a{color:inherit;text-decoration:none}.wrap{width:min(1160px,calc(100% - 36px));margin:auto}.top{background:var(--navy);color:#dbe8fa;padding:8px 0;font-size:13px}.top .wrap{display:flex;justify-content:space-between}.nav{height:70px;background:#fff;border-bottom:1px solid var(--line)}.nav .wrap{height:100%;display:flex;justify-content:space-between;align-items:center}.brand{display:flex;align-items:center;gap:10px;font-weight:800}.mark{display:grid;place-items:center;width:38px;height:38px;background:var(--orange);border-radius:12px;color:#fff;font-size:20px}.brand small{display:block;color:var(--muted);font-size:12px;font-weight:500;line-height:1.2}.navright{display:flex;align-items:center;gap:19px;font-size:14px}.navright a{color:var(--blue);font-weight:800}.crumb{padding:24px 0 8px;color:var(--muted);font-size:14px}.crumb a{color:var(--blue);font-weight:800}.lesson-head{display:grid;grid-template-columns:1.08fr .92fr;gap:28px;align-items:center;padding:10px 0 28px}.kicker{font-size:13px;color:var(--orange);font-weight:900;letter-spacing:.1em}.lesson-head h1{font-size:clamp(32px,4.5vw,56px);line-height:1.22;letter-spacing:-.04em;margin:9px 0 10px}.lesson-head p{color:var(--muted);margin:0 0 16px;max-width:650px}.meta{display:flex;flex-wrap:wrap;gap:8px}.pill{display:inline-flex;align-items:center;gap:5px;padding:5px 10px;border-radius:99px;background:#fff;border:1px solid var(--line);color:#52627a;font-size:13px}.pill strong{color:var(--blue)}.hero-img{display:block;width:100%;height:250px;object-fit:cover;border-radius:22px;box-shadow:0 16px 36px #16243d20}.layout{display:grid;grid-template-columns:minmax(0,1fr) 295px;gap:22px;padding-bottom:60px}.content,.side-card{background:#fff;border:1px solid var(--line);border-radius:19px;box-shadow:0 8px 25px #16243d0a}.content{padding:28px}.content h2{font-size:25px;line-height:1.35;margin:0 0 11px}.content h3{font-size:19px;line-height:1.45;margin:26px 0 8px}.content p{margin:0 0 12px}.lead{font-size:18px;color:#40536f}.callout{padding:17px 18px;border-left:4px solid var(--orange);background:#fff7ea;border-radius:10px;margin:18px 0;color:#5e461f}.model{display:grid;grid-template-columns:repeat(3,1fr);gap:9px;margin:17px 0 22px}.model div{padding:15px 13px;background:var(--soft);border-radius:12px;text-align:center}.model b{display:block;color:var(--blue);font-size:17px;margin-bottom:3px}.model span{font-size:13px;color:#58677e}.steps{display:grid;gap:10px;margin:13px 0}.step{display:grid;grid-template-columns:33px 1fr;gap:11px;align-items:start;padding:12px 13px;border:1px solid var(--line);border-radius:12px}.step b{display:grid;place-items:center;width:30px;height:30px;border-radius:50%;background:var(--navy);color:#fff}.step strong{display:block;margin-bottom:2px}.step span{color:#53627a;font-size:14px}.dialogue{border:1px solid #bfe4dc;background:#f2fbf8;border-radius:13px;padding:16px 17px;margin:14px 0}.dialogue p{margin:0 0 8px}.dialogue p:last-child{margin-bottom:0}.speaker{font-weight:900;color:var(--teal)}.mistakes{margin:10px 0 0;padding-left:22px;color:#53627a}.mistakes li{margin:4px 0}.reflect{background:#f1eaff;border-radius:13px;padding:16px 17px;margin-top:17px}.reflect strong{color:#6246a7}.actions{display:flex;flex-wrap:wrap;gap:10px;margin-top:24px}.btn{border:0;border-radius:10px;padding:11px 15px;font:inherit;font-weight:800;cursor:pointer}.btn-primary{background:var(--blue);color:#fff}.btn-light{background:var(--soft);color:var(--blue)}.btn.done{background:var(--teal);color:#fff}.side{display:grid;gap:15px;align-content:start}.side-card{padding:19px}.side-card h2{font-size:18px;line-height:1.4;margin:0 0 11px}.side-card p{font-size:14px;color:var(--muted);margin:0 0 13px}.lesson-list{display:grid;gap:6px;max-height:430px;overflow:auto}.lesson-link{display:grid;grid-template-columns:36px 1fr;gap:8px;align-items:center;border:1px solid transparent;border-radius:10px;padding:8px;color:#52627a;font-size:14px}.lesson-link:hover,.lesson-link.active{background:var(--soft);border-color:#c9d9f5;color:var(--blue)}.lesson-link b{font-size:13px;color:var(--blue)}.next{display:flex;justify-content:space-between;gap:12px;align-items:center;padding-top:13px;border-top:1px dashed var(--line)}.next a{color:var(--blue);font-weight:800;font-size:14px}.status{font-size:13px;color:var(--teal);min-height:22px;margin-top:8px}footer{background:#111d31;color:#aab9ce;padding:24px 0;font-size:13px}footer strong{color:#fff}@media(max-width:850px){.lesson-head{grid-template-columns:1fr}.hero-img{height:230px}.layout{grid-template-columns:1fr}.side{order:-1}.lesson-list{max-height:220px}.side-card:first-child{display:none}}@media(max-width:580px){.wrap{width:calc(100% - 28px)}.top .wrap{display:block}.top span:last-child{display:none}.navright a:not(:first-child){display:none}.lesson-head h1{font-size:38px}.hero-img{height:190px}.content{padding:21px}.content h2{font-size:22px}.model{grid-template-columns:1fr}.model div{text-align:left}.next{display:block}.next a{display:block;margin-top:8px}}