@import url('https://fonts.googleapis.com/css2?family=DM+Sans:wght@400;500;600;700&family=Manrope:wght@400;500;600;700;800&display=swap');
:root{--ink:#183633;--muted:#667b76;--paper:#f7f5ee;--green:#185d4c;--lime:#d7edb4;--line:#dce2d8;--white:#fffef9;--gold:#b77738}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font:15px 'DM Sans',sans-serif;line-height:1.6}button,input,select{font:inherit}button,a{touch-action:manipulation}a{color:inherit;text-decoration:none}button{cursor:pointer}button:disabled{cursor:default;opacity:.5}button:focus-visible,a:focus-visible,input:focus-visible,summary:focus-visible{outline:3px solid #c18139;outline-offset:4px}.shell{max-width:1460px;margin:auto;padding:0 64px}.topbar{display:flex;align-items:center;justify-content:space-between;min-height:96px;border-bottom:1px solid var(--line);gap:24px}.brand{display:flex;align-items:center;gap:13px;font:800 19px Manrope,sans-serif;letter-spacing:-.8px}.seal{background:var(--green);color:var(--lime);border-radius:11px;width:43px;height:46px;display:grid;place-items:center;font-size:29px}.nav{display:flex;gap:32px;align-items:center}.nav a{color:var(--muted);font-size:14px}.nav a:hover{color:var(--green)}.pill{display:inline-flex;align-items:center;gap:8px;border:1px solid var(--line);padding:8px 15px;border-radius:40px;font-size:12px}.dot{width:6px;height:6px;background:#50967b;border-radius:50%}.btn{display:inline-flex;align-items:center;justify-content:center;gap:14px;padding:14px 23px;border:1px solid var(--green);border-radius:9px;background:var(--green);color:white;font-weight:600;font-size:14px}.btn.secondary{background:transparent;color:var(--ink);border-color:var(--line)}.hero{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:68px;padding:64px 0 56px}.eyebrow{text-transform:uppercase;font-size:11px;font-weight:700;letter-spacing:2px;color:var(--green);display:flex;align-items:center;gap:12px}.eyebrow:before{content:'';height:1px;width:27px;background:var(--green)}h1,h2,h3{font-family:Manrope,sans-serif;line-height:1.16}h1{font-size:clamp(40px,4vw,64px);letter-spacing:-3px;font-weight:600;margin:20px 0 24px}h1 em{font-style:normal;color:var(--green)}.hero p{color:var(--muted);max-width:440px;font-size:16px;line-height:1.85}.actions{display:flex;gap:12px;flex-wrap:wrap;margin-top:30px}.hero-art{position:relative;background:#192f32;border-radius:14px;padding:18px 18px 45px;box-shadow:0 16px 44px #20332918;transform:rotate(1deg)}.hero-art img{width:100%;height:440px;object-fit:cover;object-position:top;display:block;border-radius:7px}.hero-art .caption{color:#f5eedc;position:absolute;bottom:12px;left:20px;font-size:11px;letter-spacing:.8px}.floating{position:absolute;bottom:65px;left:-34px;background:var(--white);border:1px solid var(--line);border-radius:11px;padding:17px 22px;box-shadow:0 10px 30px #132e3326;transform:rotate(-1deg);display:flex;gap:18px;align-items:center}.han{font-family:'Noto Sans CJK SC','Microsoft YaHei',sans-serif}.floating .han{font-size:32px}.floating small{display:block;color:var(--muted)}.stats{display:flex;gap:30px;margin-top:34px;font-size:11px;color:var(--muted)}.stats strong{display:block;font:700 21px Manrope;color:var(--ink)}.section-head{display:flex;justify-content:space-between;align-items:end;gap:20px;margin:28px 0}.section-head h2{font-size:29px;letter-spacing:-1px;margin:0 0 8px}.section-head p{margin:0;color:var(--muted);font-size:13px}.path{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--line);border-radius:12px;background:var(--white);margin:0 0 55px}.step{padding:26px;border-right:1px solid var(--line)}.step:last-child{border:0}.step span{font:600 12px Manrope;color:var(--gold)}.step h3{font-size:16px;margin:13px 0 8px}.step p{font-size:12px;color:var(--muted);margin:0}.toolbar{display:flex;gap:14px;align-items:center;flex-wrap:wrap;margin-bottom:24px}.toolbar input{background:var(--white);border:1px solid var(--line);border-radius:8px;padding:12px 16px;flex:1;min-width:180px}.toolbar select{background:var(--white);border:1px solid var(--line);border-radius:8px;padding:12px}.cards{display:grid;grid-template-columns:repeat(4,minmax(0,1fr));gap:22px}.lesson-card{background:var(--white);border:1px solid var(--line);border-radius:12px;overflow:hidden;transition:transform .15s,box-shadow .15s}.lesson-card:hover{transform:translateY(-4px);box-shadow:0 12px 24px #15382b12}.thumb{height:210px;background:#e7eadf;position:relative;overflow:hidden}.thumb img{width:100%;height:100%;object-fit:cover;object-position:top}.number{position:absolute;top:13px;left:13px;background:var(--white);padding:4px 10px;border-radius:5px;font-size:11px;font-weight:700}.card-body{padding:18px}.card-body h3{font-size:16px;line-height:1.4;margin:8px 0 12px}.card-body p{font-size:12px;color:var(--muted);min-height:39px}.tag{font-size:10px;font-weight:600;letter-spacing:.4px;color:var(--green);text-transform:uppercase}.card-foot{display:flex;justify-content:space-between;font-size:11px;padding-top:14px;border-top:1px solid var(--line);color:var(--muted)}.notice{border:1px solid var(--line);background:#edf0e7;padding:16px 20px;border-radius:9px;font-size:12px;color:var(--muted);margin:24px 0}.footer{border-top:1px solid var(--line);margin-top:65px;padding:28px 0;color:var(--muted);font-size:12px;display:flex;justify-content:space-between;gap:20px}.back{display:inline-block;font-size:13px;margin:27px 0;color:var(--muted)}.lesson-head{display:flex;align-items:start;justify-content:space-between;gap:24px;margin:0 0 28px}.lesson-head h1{font-size:39px;letter-spacing:-1.6px;margin:10px 0}.lesson-head p{color:var(--muted);max-width:650px}.tabs{display:flex;gap:8px;border-bottom:1px solid 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a{display:block;font-size:13px;color:var(--green)}.exercise{background:var(--white);border:1px solid var(--line);border-radius:12px;padding:28px;margin-bottom:22px}.exercise h3{font-size:20px;margin:0 0 18px}.choices{display:grid;gap:10px}.choice{display:block;border:1px solid var(--line);border-radius:8px;padding:14px;cursor:pointer}.choice:has(input:checked){border-color:var(--green);background:#edf3e5}.choice input{margin-right:10px}.feedback{padding:12px 16px;background:#e9f1e3;border-radius:8px;margin-top:16px;font-size:14px}.feedback.wrong{background:#fff0e8}.source-task{white-space:pre-wrap}details{margin-top:20px}summary{cursor:pointer;font-weight:600;color:var(--green)}.media-pending{border:1px dashed #b7c7b8;padding:28px;border-radius:12px;background:#eef2e9;margin-bottom:24px}.cast-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px}.cast-card{background:var(--white);padding:18px;border:1px solid var(--line);border-radius:12px}.cast-card img{width:100%;height:230px;object-fit:cover;object-position:top;border-radius:8px}.cast-card h3{margin-bottom:4px}.clip{border:1px solid var(--line);background:var(--white);border-radius:10px;padding:20px;margin:12px 0}.clip .han{font-size:25px}.clip small{display:block;color:var(--muted)}audio,video{width:100%;margin-top:15px}.empty{padding:35px;border:1px dashed var(--line);text-align:center;color:var(--muted)}.result{font-size:24px;color:var(--green);font-weight:700}.progress-row{display:flex;gap:12px;align-items:center;flex-wrap:wrap}.pending-list{font-size:12px;color:var(--muted);padding:18px 0}.skip{position:absolute;top:-100px}.skip:focus{top:0;background:white;z-index:10;padding:10px}#kc-app{min-height:100vh}@media(min-width:1600px){.hero-art img{height:500px}}@media(max-width:1050px){.shell{padding:0 30px}.hero{gap:38px}.hero-art img{height:370px}.cards{grid-template-columns:repeat(3,1fr)}.reader{grid-template-columns:minmax(0,1fr) 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