:root{--bg:#ffffff;--fg:#1a1a1a;--muted:#6b7280;--line:#e5e7eb;--accent:#2563eb;--card:#f7f7f8}@media(prefers-color-scheme:dark){:root{--bg:#111111;--fg:#e8e8e8;--muted:#9ca3af;--line:#2a2a2a;--accent:#60a5fa;--card:#1a1a1a}}*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}body{margin:0;background:var(--bg);color:var(--fg);font-family:-apple-system,BlinkMacSystemFont,pingfang sc,hiragino sans gb,microsoft yahei,segoe ui,sans-serif;font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased}.wrap{max-width:720px;margin:0 auto;padding:0 22px}a{color:var(--accent)}header{padding:28px 0 18px;border-bottom:1px solid var(--line)}.nav{display:flex;align-items:baseline;justify-content:space-between;gap:16px;flex-wrap:wrap}.brand{font-size:20px;font-weight:700;letter-spacing:-.01em}.brand a{color:var(--fg);text-decoration:none}.brand-en{margin-left:7px;font-size:12px;font-weight:400;letter-spacing:.04em;color:var(--muted)}.nav-links{display:flex;gap:18px;font-size:14px}.nav-links a{color:var(--muted);text-decoration:none}.nav-links a:hover{color:var(--accent)}.hero{padding:34px 0 30px}.hero h1{margin:0 0 10px;font-size:28px;line-height:1.35;letter-spacing:-.02em}.hero p{margin:0;color:var(--muted)}.list-intro{margin-top:12px;color:var(--muted)}section{padding:8px 0 30px}.section-title{display:flex;align-items:baseline;justify-content:space-between;margin:0 0 14px;font-size:13px;font-weight:600;letter-spacing:.08em;text-transform:uppercase;color:var(--muted)}.list{list-style:none;margin:0;padding:0}.list li{border-bottom:1px solid var(--line)}.list li:last-child{border-bottom:0}.list a{display:block;padding:16px 0;color:inherit;text-decoration:none;transition:opacity .15s}.list a:hover{opacity:.6}.item-title{font-size:17px;font-weight:600;margin-bottom:4px}.item-meta{font-size:13px;color:var(--muted)}article{padding:30px 0 10px}article h1{margin:0 0 8px;font-size:26px;line-height:1.4;letter-spacing:-.02em}.article-meta{font-size:13px;color:var(--muted);padding-bottom:18px;border-bottom:1px solid var(--line);margin-bottom:24px}article h2{font-size:19px;margin:32px 0 10px}article h3{font-size:17px;margin:26px 0 8px}article p{margin:0 0 16px}article ul,article ol{margin:0 0 16px;padding-left:24px}article li{margin:4px 0}article img{max-width:100%;height:auto;border-radius:6px;margin:20px 0}article blockquote{margin:20px 0;padding:2px 16px;border-left:3px solid var(--accent);color:var(--muted)}article code{padding:2px 6px;border-radius:4px;background:var(--card);font-size:14px;font-family:ui-monospace,SFMono-Regular,Menlo,monospace}article pre{padding:14px 16px;border-radius:6px;background:var(--card);overflow-x:auto;font-size:14px;line-height:1.6}article pre code{background:0 0;padding:0}article hr{border:0;border-top:1px solid var(--line);margin:28px 0}.back{display:inline-block;margin-top:30px;font-size:14px;text-decoration:none}footer{margin-top:40px;padding:22px 0 40px;border-top:1px solid var(--line);font-size:13px;color:var(--muted)}@media(max-width:520px){.hero h1{font-size:23px}article h1{font-size:22px}}html.gate-locked{overflow:hidden}.gate{position:fixed;inset:0;z-index:9999;display:flex;align-items:center;justify-content:center;padding:24px;background:var(--bg);transition:opacity .34s ease,visibility .34s}.gate.is-open{opacity:0;visibility:hidden}.gate-inner{width:100%;max-width:380px;text-align:center}.gate-brand{font-size:17px;font-weight:700;letter-spacing:-.01em}.gate-en{margin-top:3px;font-size:11px;letter-spacing:.14em;text-transform:uppercase;color:var(--muted)}.gate-rule{width:36px;height:1px;background:var(--line);margin:26px auto}.gate-title{margin:0;font-size:26px;line-height:1.3;letter-spacing:-.02em}.gate-sub{margin:8px 0 0;font-size:14px;color:var(--muted)}.gate-form{display:flex;gap:8px;margin:26px 0 0}.gate-input{flex:1;min-width:0;padding:10px 12px;font:inherit;font-size:15px;color:var(--fg);background:var(--card);border:1px solid var(--line);border-radius:6px;outline:none;transition:border-color .15s ease,background .15s ease}.gate-input::placeholder{color:var(--muted)}.gate-input:focus{border-color:var(--accent);background:var(--bg)}.gate-btn{flex:none;padding:10px 20px;font:inherit;font-size:15px;font-weight:600;color:#fff;background:var(--accent);border:0;border-radius:6px;cursor:pointer;transition:opacity .15s ease}.gate-btn:hover{opacity:.86}.gate-btn:active{transform:translateY(1px)}.gate-hint{min-height:20px;margin:12px 0 0;font-size:13px;color:var(--muted)}@keyframes gate-shake{0%,100%{transform:translateX(0)}20%{transform:translateX(-6px)}40%{transform:translateX(6px)}60%{transform:translateX(-4px)}80%{transform:translateX(4px)}}.gate.is-shake .gate-form{animation:gate-shake .32s ease}@media(prefers-reduced-motion:reduce){.gate{transition:none}.gate-input,.gate-btn{transition:none}.gate.is-shake .gate-form{animation:none}}