:root{color-scheme:dark;font-family:Arial,"PingFang TC","Microsoft JhengHei",sans-serif;color:#f5f5f8;background:#08090d}
*{box-sizing:border-box}body{margin:0}a{color:inherit;text-decoration:none}button{font:inherit;color:inherit;cursor:pointer}a:focus-visible,button:focus-visible{outline:2px solid #bca9ff;outline-offset:5px}.skip-link{position:absolute;top:-60px;left:20px;z-index:10}.skip-link:focus{top:12px;background:#111;padding:10px}
.cover{position:relative;isolation:isolate;min-height:100svh;max-width:1920px;margin:auto;overflow:hidden;display:flex;flex-direction:column}.cover-image{position:absolute;inset:0;width:100%;height:100%;object-fit:cover;z-index:-2;aspect-ratio:640/427}.cover:after{content:"";position:absolute;inset:0;z-index:-1;background:linear-gradient(180deg,#0005,transparent 40%,#08090d22 75%,#08090d)}
.cover-header{display:flex;justify-content:space-between;align-items:center;padding:18px 2.3%;gap:24px}.brand{display:flex;align-items:center;flex:0 0 auto;min-width:0}.brand img{display:block;width:300px;height:auto;max-width:min(32vw,340px);object-fit:contain;object-position:left center}.cover-header nav{display:flex;align-items:center;gap:30px}.cover-header button{background:none;border:0;font-size:13px;color:#ccc;padding:8px 0;letter-spacing:1px}.cover-header button:hover{color:white}.cover-header .login{border:1px solid #ffffff40;border-radius:7px;padding:9px 22px}
main{position:relative;flex:1;display:flex;flex-direction:column;align-items:center;width:100%}.hero{text-align:center;margin-top:clamp(18px,3vh,48px);padding:0 22px}.hero h1{font-size:clamp(38px,4.7vw,72px);line-height:1.24;letter-spacing:4px;margin:0 0 16px;font-weight:800}.hero h1 span{background:linear-gradient(110deg,#ba8eee,#337ddd);background-clip:text;color:transparent}.hero-description{font-size:clamp(11px,1.1vw,16px);letter-spacing:1.3px;color:#d2d1d7}.benefits{display:flex;justify-content:center;gap:30px;list-style:none;padding:0;margin:18px 0;font-size:12px;color:#c0beca}.benefits span{color:#aa85e6;margin-right:8px;font-size:16px}.side-note{position:absolute;top:55px;left:3.5%;font-size:12px;line-height:1.8;color:#b1b0bc}.side-note p{letter-spacing:2px;color:#eee}.side-note span{font-size:11px}
.entry-cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:32px;width:min(800px,85%);margin:clamp(95px,22vh,300px) auto 0;padding-bottom:16px}.entry-card{padding:26px 24px 22px;border:1px solid #9682c8;border-radius:20px;background:linear-gradient(145deg,#34303de8,#17151ee8);box-shadow:0 12px 40px #0005,inset 0 1px #ffffff20}.entry-card.practice{border-color:#537a9f;background:linear-gradient(145deg,#303e4be8,#151c25e8)}.card-top{display:flex;align-items:flex-start;gap:22px}.card-icon{flex-shrink:0;display:grid;place-items:center;width:80px;height:80px;border-radius:50%;background:linear-gradient(135deg,#60429c,#292d63);box-shadow:inset 0 1px #ffffff25}.practice .card-icon{background:linear-gradient(135deg,#365d83,#19334d)}.card-icon svg{width:44px;height:44px;fill:none;stroke:white;stroke-width:3;stroke-linecap:round;stroke-linejoin:round}.course .card-icon svg path{fill:white;stroke-width:1}.entry-card h2{font-size:27px;margin:0 0 9px;letter-spacing:2px}.subtitle{font-size:13px;letter-spacing:1px;color:#dedce5;margin:0 0 12px}.card-description{font-size:12px;line-height:1.9;color:#c5c2ce;margin:0}.entry-button{display:flex;justify-content:center;align-items:center;gap:12px;background:linear-gradient(100deg,#6844b4,#4546cb);border-radius:30px;min-height:48px;margin:20px 20px 0;font-weight:bold;letter-spacing:1px;transition:filter .2s,transform .2s}.practice .entry-button{background:linear-gradient(100deg,#1574cf,#165db4)}.entry-button:hover{filter:brightness(1.2);transform:translateY(-2px)}footer{text-align:center;font-size:13px;letter-spacing:2px;color:#aaa6c4;padding:14px 20px 8px}footer span{display:block;color:#8774ed;font-size:17px;margin-top:4px}
#rwAuthAvatarBtn{display:none!important}dialog{background:#1c1c29;color:#eee;border:1px solid #666080;border-radius:18px;max-width:480px;width:calc(100% - 40px);padding:32px}dialog::backdrop{background:#000b}dialog h2{margin-top:0}dialog p{color:#c9c6d5;line-height:1.9}.dialog-close{position:absolute;right:12px;top:8px;border:0;background:none;font-size:28px}
@media(min-width:1600px){.entry-cards{margin-top:24vh}}
@media(max-width:760px){.cover-header{padding:16px 20px;align-items:flex-start}.brand img{width:250px;max-width:58vw}.cover-header nav{gap:12px;justify-content:flex-end;flex-wrap:wrap}.cover-header nav button{font-size:11px}.cover-header nav button:not(.login){display:none}.cover-header .login{padding:7px 12px}.side-note{display:none}.hero{margin-top:45px}.hero h1{font-size:clamp(32px,7vw,48px);letter-spacing:2px}.hero-description{max-width:330px;line-height:1.8;margin:16px auto}.benefits{gap:16px;font-size:10px}.entry-cards{width:min(440px,calc(100% - 40px));grid-template-columns:1fr;gap:18px;margin-top:70px}.entry-card{padding:22px}.card-icon{width:65px;height:65px}.entry-card h2{font-size:24px}.entry-button{margin:18px 0 0}.card-top{gap:20px}footer{font-size:10px;line-height:1.8;padding:16px 15px}.cover{min-height:100svh}}
@media(prefers-reduced-motion:reduce){.entry-button{transition:none}}