:root{--bg:#faf9f6;--card:#fff;--fg:#1c1b1f;--muted:#5f5d66;--line:#e7e4dd;--acc:#5546d8}
@media (prefers-color-scheme:dark){:root{--bg:#131316;--card:#1d1d22;--fg:#f1f0f4;--muted:#a8a6b0;--line:#2c2c33;--acc:#a99bff}}
*{box-sizing:border-box}html{-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--fg);font:17px/1.6 -apple-system,BlinkMacSystemFont,"Segoe UI",system-ui,"Noto Sans",sans-serif;overflow-wrap:anywhere}
:lang(ja),:lang(zh),:lang(ko){line-break:strict}:lang(ar) body,body:lang(ar){line-height:1.75}
a{color:var(--acc)}main,header,footer{max-width:880px;margin:0 auto;padding:0 16px}
header{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:8px 16px;padding-top:20px;padding-bottom:8px}
.brand{font-weight:800;font-size:20px;text-decoration:none;color:var(--fg);letter-spacing:-.01em;white-space:nowrap}
.brand span{color:var(--acc)}nav{display:flex;align-items:center;gap:16px;flex-wrap:wrap}
nav>a{text-decoration:none;color:var(--muted);font-size:15px}
.lang{position:relative;font-size:15px}.lang summary{list-style:none;cursor:pointer;color:var(--muted);padding:4px 10px;border:1px solid var(--line);border-radius:99px;white-space:nowrap}
.lang summary::-webkit-details-marker{display:none}.lang[open] summary{color:var(--fg);border-color:var(--acc)}
.lang ul{position:absolute;inset-inline-end:0;top:calc(100% + 6px);z-index:10;margin:0;padding:6px;list-style:none;background:var(--card);border:1px solid var(--line);border-radius:14px;box-shadow:0 8px 30px rgba(0,0,0,.12);min-width:170px;max-height:70vh;overflow:auto}
.lang li a{display:block;padding:6px 10px;border-radius:8px;text-decoration:none;color:var(--fg)}.lang li a:hover{background:var(--bg)}
.lang li a[aria-current]{color:var(--acc);font-weight:700}
.banner{display:flex;align-items:center;gap:10px;max-width:880px;margin:10px auto 0;padding-block:8px;padding-inline:14px 8px;background:var(--card);border:1px solid var(--line);border-radius:12px;font-size:15px;width:calc(100% - 32px)}
.banner a{font-weight:600;text-decoration:none;flex:1}.banner button{border:0;background:none;color:var(--muted);font-size:20px;line-height:1;cursor:pointer;padding:4px 8px}
h1{font-size:clamp(30px,6vw,46px);line-height:1.15;letter-spacing:-.02em;margin:28px 0 12px}
:lang(ja) h1,:lang(zh) h1,:lang(ko) h1,:lang(ar) h1,:lang(hi) h1{letter-spacing:0;line-height:1.3}
h2{font-size:22px;margin:36px 0 12px}.lead{font-size:19px;color:var(--muted);max-width:640px}
.tile{width:60px;height:60px;border-radius:14px;flex:none;display:grid;place-items:center;color:#fff;font-weight:800;font-size:24px}
.pill{display:inline-block;font-size:12px;font-weight:700;padding:2px 9px;border-radius:99px;background:color-mix(in srgb,var(--acc) 15%,transparent);color:var(--acc);margin-top:4px}
.hero{display:flex;gap:20px;align-items:center;margin-top:24px}.hero img{width:96px;height:96px;border-radius:22px;flex:none}
.hero h1{margin:0}.hero p{margin:4px 0 0;color:var(--muted)}
ul.f{padding-inline-start:20px}ul.f li{margin:6px 0}.links{display:flex;flex-wrap:wrap;gap:10px;margin:22px 0}
.btn{display:inline-block;padding:10px 18px;border-radius:12px;background:var(--acc);color:#fff;text-decoration:none;font-weight:600}
.btn.ghost{background:transparent;color:var(--acc);border:1px solid var(--line)}
.doc{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:8px 22px 18px;margin:18px 0}
.doc h2{font-size:19px}.note{color:var(--muted);font-size:15px}
.principles{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px;margin:22px 0 8px}
.principle{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:16px}
.principle b{display:block;font-size:17px;margin-bottom:4px}.principle span{color:var(--muted);font-size:15px}
.app{background:var(--card);border:1px solid var(--line);border-radius:24px;padding:22px;margin:18px 0;scroll-margin-top:16px}
.app .head{display:flex;gap:16px;align-items:center}.app .head img{width:76px;height:76px;border-radius:18px;flex:none}
.app h3{margin:0;font-size:26px;letter-spacing:-.01em}.app .tag{color:var(--muted);margin:2px 0 0}
.why{border-inline-start:3px solid var(--acc);padding:2px 12px;color:var(--muted);font-size:15px;margin:14px 0}
.app ul{list-style:none;padding:0;margin:12px 0;display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));gap:8px 18px}
.app li{padding-inline-start:26px;position:relative;font-size:16px}.app li:before{content:"✓";position:absolute;inset-inline-start:0;color:var(--acc);font-weight:800}
.meta{display:flex;flex-wrap:wrap;gap:10px;align-items:center;margin-top:12px;font-size:14px}
.meta .price{font-weight:700}.meta a{text-decoration:none}.promise{font-size:14px;color:var(--muted);margin:6px 0 0}
.toc{display:flex;flex-wrap:wrap;gap:8px;margin:10px 0}.toc a{text-decoration:none;font-size:14px;font-weight:600;padding:6px 12px;border:1px solid var(--line);border-radius:99px;color:var(--fg);background:var(--card)}
footer{color:var(--muted);font-size:14px;padding-top:36px;padding-bottom:40px}
@media (max-width:420px){.hero img{width:72px;height:72px;border-radius:17px}.app{padding:16px}.app .head img{width:60px;height:60px;border-radius:14px}}
.cards{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:14px;margin:16px 0 8px}
.card{display:flex;gap:14px;align-items:flex-start;background:var(--card);border:1px solid var(--line);border-radius:22px;padding:18px;text-decoration:none;color:var(--fg);transition:transform .15s,border-color .15s,box-shadow .15s}
.card:hover{transform:translateY(-2px);border-color:var(--c);box-shadow:0 10px 30px color-mix(in srgb,var(--c) 18%,transparent)}
.card img,.card .tile{width:64px;height:64px;border-radius:15px;flex:none}.card .cbody{display:flex;flex-direction:column;gap:2px;min-width:0}
.card b{font-size:20px;letter-spacing:-.01em}.card .tag{color:var(--c);font-weight:700;font-size:14px}.card .about{color:var(--muted);font-size:15px;line-height:1.5;margin-top:4px}
.card .more{margin-top:8px;font-weight:700;font-size:14px;color:var(--c)}
@media (prefers-color-scheme:dark){.card .tag,.card .more{color:color-mix(in srgb,var(--c) 55%,#fff)}}