:root{color-scheme:dark;--bg:#111918;--panel:#1b2725;--text:#edf2eb;--muted:#bac7c1;--accent:#b9d790;--line:#41524b;font:16px/1.6 system-ui,"Microsoft YaHei","Noto Sans CJK SC",sans-serif}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);padding:0 max(24px,env(safe-area-inset-right)) 0 max(24px,env(safe-area-inset-left))}
header,main,footer{max-width:1080px;margin:auto}header{display:flex;justify-content:space-between;align-items:center;gap:24px;padding:32px 0;border-bottom:1px solid var(--line)}.brand{font-size:20px;font-weight:750;letter-spacing:.14em;text-decoration:none;color:var(--text)}.brand span{display:block;font-size:10px;letter-spacing:.23em;color:var(--accent)}.language{display:flex;align-items:center;gap:12px;font-size:13px}.language select{width:auto;margin:0}
main{display:grid;grid-template-columns:1fr 1.15fr;gap:68px;padding:64px 0}.eyebrow{font-size:11px;letter-spacing:.18em;font-weight:700;color:var(--accent)}h1{font-size:clamp(36px,5vw,56px);line-height:1.1;letter-spacing:-.04em;margin:24px 0}h2{font-size:17px;margin:0 0 12px}.intro>p:not(.eyebrow){color:var(--muted)}aside{border-top:1px solid var(--line);margin:36px 0 20px;padding-top:24px}ol{padding-left:20px;color:var(--muted)}li{margin:12px 0}.small,.hint{font-size:13px;color:var(--muted)}.panel{background:var(--panel);border:1px solid var(--line);border-radius:16px;padding:28px}label{display:block;font-size:14px;font-weight:650}input,textarea,select,button{font:inherit}input,textarea,select{width:100%;border:1px solid #63786c;background:#111b18;color:var(--text);border-radius:6px;padding:12px;margin:8px 0 20px;min-height:48px}textarea{resize:vertical;line-height:1.5}input:focus-visible,textarea:focus-visible,select:focus-visible,button:focus-visible,summary:focus-visible,a:focus-visible{outline:3px solid var(--accent);outline-offset:3px}.hint{margin:-12px 0 22px;line-height:1.5}details{margin:-8px 0 20px;font-size:13px;color:var(--muted)}summary{cursor:pointer;color:var(--accent);min-height:36px}.consent{display:flex;gap:12px;font-size:13px;font-weight:400;align-items:flex-start;margin:20px 0}.consent input{width:20px;min-height:20px;flex:0 0 20px;margin:2px 0;accent-color:var(--accent)}button{min-height:52px;width:100%;background:var(--accent);color:#172114;border:0;border-radius:6px;font-weight:700;padding:12px;cursor:pointer;margin-top:16px}button:hover:enabled{background:#d1e8b6}button:disabled{opacity:.5;cursor:not-allowed}#status{font-size:14px;margin:16px 0 0;color:var(--accent);overflow-wrap:anywhere}#status[data-error="true"]{color:#ffc0a4}footer{border-top:1px solid var(--line);padding:24px 0 36px;font-size:10px;letter-spacing:.16em;color:var(--muted)}#challenge{min-height:1px}
@media(max-width:760px){header{padding:20px 0}.language>span{display:none}.brand{font-size:16px}main{grid-template-columns:1fr;gap:20px;padding:32px 0}.intro aside{margin:24px 0 16px}.panel{padding:20px}h1{margin:16px 0}body{padding-left:max(16px,env(safe-area-inset-left));padding-right:max(16px,env(safe-area-inset-right))}}
nav{max-width:1080px;margin:auto;display:flex;gap:28px;padding-top:20px}a{color:var(--accent)}nav a{text-decoration:none;min-height:36px}nav a[aria-current]{border-bottom:2px solid var(--accent)}.button{display:inline-block;text-align:center;background:var(--accent);color:#172114;border-radius:6px;padding:14px 22px;font-weight:700;text-decoration:none;min-height:52px}.button:hover{background:#d1e8b6}.button[aria-disabled]{opacity:.5;cursor:not-allowed}.actions{display:flex;flex-wrap:wrap;align-items:center;gap:24px;margin-top:30px}.portal h2{font-size:24px}.portal p{color:var(--muted)}.portal .eyebrow{color:var(--accent)}.portal details{margin:24px 0}.hash{overflow-wrap:anywhere;font-size:12px}hr{border:0;border-top:1px solid var(--line);margin:26px 0}