:root{--bg:#f5f7fb;--card:#fff;--line:#e3e8f0;--text:#1f2933;--text2:#5b6675;--text3:#9aa5b4;--accent:#2563eb;--accentH:#1d4ed8;--accent-bg:#eaf0ff;--accent-deep:#1e3a8a;--ok:#16a34a;--maxw:1140px}*{box-sizing:border-box;margin:0;padding:0}body{font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Hiragino Sans,sans-serif;background:var(--bg);color:var(--text);line-height:1.75;font-size:15px}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}.site-header{position:-webkit-sticky;position:sticky;top:0;z-index:200;background:#fff;border-bottom:1px solid var(--line)}.header-inner{max-width:var(--maxw);margin:0 auto;padding:12px 24px;justify-content:space-between;gap:16px}.brand,.header-inner{display:flex;align-items:center}.brand{gap:10px}.brand .logo{width:30px;height:30px;flex-shrink:0}.brand .name{font-size:18px;font-weight:800;letter-spacing:-.01em;line-height:1.1}.brand .name .ac{color:var(--accent)}.brand 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