:root{--ink:#082e3b;--sea:#063648;--mint:#a7ecdc;--gold:#ffe09b;--paper:#f7f6f0;--line:#c8d7d5}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:110px}body{margin:0;color:var(--ink);background:var(--paper);font-family:"Avenir Next","PingFang SC","Segoe UI",sans-serif;line-height:1.7}a{color:inherit;text-underline-offset:5px}a:focus-visible,summary:focus-visible{outline:3px solid #df941e;outline-offset:5px}.skip{position:absolute;top:-90px;padding:10px;background:white;z-index:10}.skip:focus{top:0}header{padding:18px clamp(20px,5vw,80px);display:flex;justify-content:space-between;align-items:center;gap:20px;background:var(--paper);border-bottom:1px solid var(--line)}.brand{display:flex;align-items:center;gap:12px;text-decoration:none;font-size:21px;font-weight:800;line-height:1.1}.brand img{border-radius:12px}.brand small{display:block;font-size:12px;font-weight:500;letter-spacing:3px;margin-top:6px}nav{display:flex;gap:25px;font-size:14px}nav a{text-decoration:none}nav a:hover{text-decoration:underline}h1,h2,h3,p{margin-top:0}h1,h2{font-family:Georgia,"Songti SC",serif;font-weight:500;letter-spacing:-.04em;line-height:1.08}h1{font-size:clamp(42px,6vw,86px);margin-bottom:25px}h2{font-size:clamp(32px,4vw,52px);margin-bottom:28px}h3{font-size:22px;line-height:1.3}.eyebrow{font-size:12px;letter-spacing:.19em;font-weight:800;margin-bottom:25px}.hero{min-height:640px;position:relative;display:flex;align-items:center;padding:72px clamp(24px,7vw,110px);background:linear-gradient(90deg,rgba(3,31,44,.93),rgba(3,31,44,.6) 45%,rgba(3,31,44,.1)),url('assets/ocean.webp') center 44%/cover;color:white}.hero h1{color:#fff0c5}.hero-copy{max-width:700px;position:relative}.lead{font-size:clamp(19px,2vw,23px);line-height:1.6}.hero-tag{position:absolute;bottom:25px;right:clamp(24px,5vw,80px);font-size:13px;color:#fff;letter-spacing:.02em}.button{display:inline-flex;align-items:center;justify-content:space-between;gap:28px;text-decoration:none;color:var(--ink);background:var(--gold);padding:15px 24px;border-radius:4px;font-size:16px;font-weight:800;margin:12px 0 18px}.button:hover{background:#ffcf66}.section{padding:80px clamp(24px,7vw,110px);max-width:1500px;margin:auto}.mode-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:24px;margin-top:40px}.mode-grid article{border-top:1px solid var(--ink);padding-top:20px}.number{display:block;color:#257c78;font-size:13px;margin-bottom:36px}.mode-grid p{font-size:15px}.learning{background:var(--sea);color:white;display:grid;grid-template-columns:1.35fr 1fr;gap:70px;align-items:center;max-width:none}.learning h2{color:var(--gold)}.learning>div{max-width:650px}.lesson-card{border:1px solid #47717a;padding:50px 30px;text-align:center;color:var(--gold);transform:rotate(-2deg)}.lesson-card span{font-family:"Songti SC",serif;font-size:clamp(30px,4vw,60px);letter-spacing:.16em;display:block}.lesson-card p{font-family:Georgia,serif;font-size:26px;margin:12px 0 24px}.lesson-card small{color:#c6dcd9;font-size:14px}.screens{display:grid;grid-template-columns:repeat(6,minmax(0,1fr));gap:36px;max-width:1080px;margin:45px auto 0}figure{margin:0}.screens img{aspect-ratio:1320/2868}.screens figure{grid-column:span 2}.screens figure:nth-child(4){grid-column:2 / span 2}.screens figure:nth-child(5){grid-column:4 / span 2}figure img{width:100%;height:auto;display:block;border-radius:22px;border:1px solid #597772;box-shadow:0 15px 40px #07304218}figcaption{font-size:14px;margin-top:20px;text-align:center}figcaption strong{display:block;font-size:20px;line-height:1.35}figcaption span{display:block;margin-top:5px;color:#32636c}figcaption p{margin:9px 0 0}.release-note{padding-left:16px;border-left:3px solid #a7bdbc;color:#345866}.compact{border-top:1px solid var(--line);padding-top:50px;padding-bottom:50px}.compact p{max-width:850px}.chinese{background:#e9ede5;max-width:none}.chinese p{max-width:800px}.document{max-width:920px;margin:auto;padding:75px 30px 80px}.document>h1{font-size:clamp(42px,6vw,72px)}.copy-block{border-top:1px solid var(--line);padding-top:30px;margin-top:35px}.copy-block h2{font-family:inherit;font-size:23px;font-weight:700;letter-spacing:-.015em;line-height:1.35;margin-bottom:12px}.copy-block p{margin-bottom:0}.document #chinese{border-top:2px solid var(--ink);margin-top:70px;padding-top:50px}.document #chinese>h2{font-size:42px}.faq{margin:35px 0 65px;border-top:1px solid var(--line)}details{border-bottom:1px solid var(--line);padding:22px 0}summary{font-size:20px;font-weight:650;cursor:pointer;line-height:1.4;padding-right:16px}details p{margin:15px 0 0;color:#2d5260}.muted{font-size:14px;color:#536c74}footer{padding:44px clamp(24px,7vw,110px);display:flex;gap:50px;justify-content:space-between;background:#092e3c;color:#c1d4d8;font-size:13px}footer strong{color:#fff;font-size:15px}footer p{margin:8px 0}footer a{display:inline-block;margin-right:18px}footer a:hover{color:white}@media(max-width:1000px){.mode-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.learning{gap:35px}.screens{gap:24px}}@media(max-width:650px){header{padding:15px 20px;flex-wrap:wrap}nav{width:100%;justify-content:space-between;gap:12px;border-top:1px solid var(--line);padding-top:12px}.hero{min-height:540px;padding:55px 24px 95px;background-position:center}.hero-tag{left:24px;right:18px;bottom:25px;font-size:12px}.hero h1{font-size:51px}.section{padding:50px 24px}.mode-grid{grid-template-columns:1fr;gap:20px}.number{margin-bottom:10px}.mode-grid article{padding-top:17px}.mode-grid h3{margin-bottom:10px}.learning{grid-template-columns:1fr}.lesson-card{width:100%;padding:40px 20px}.lesson-card span{font-size:45px}.screens{gap:36px;grid-template-columns:1fr;max-width:340px}.screens figure:nth-child(n){grid-column:auto}.document{padding:48px 22px}.document h1{font-size:44px}summary{font-size:18px}.copy-block h2{font-size:21px}footer{flex-direction:column;gap:25px;padding:35px 24px}}@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}.lesson-card{transform:none}}