:root{--blue:#0758d9;--navy:#071a38;--ink:#10233f;--muted:#687892;--line:#e4eaf3;--bg:#f4f7fb;--card:#fff;--up:#e34350;--down:#119777}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font:15px/1.55 "Noto Sans SC",Arial,sans-serif}a{color:inherit}.site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.94);border-bottom:1px solid var(--line);backdrop-filter:blur(14px)}.topbar,.wrap{max-width:1240px;margin:auto;padding-left:22px;padding-right:22px}.topbar{min-height:68px;display:flex;align-items:center;gap:28px}.brand{font-weight:900;text-decoration:none;letter-spacing:-.04em;font-size:21px;color:var(--navy)}.brand i{display:inline-grid;place-items:center;width:27px;height:27px;background:var(--blue);color:#fff;border-radius:8px;font-size:15px;margin-right:6px}.nav{display:flex;gap:4px;align-items:center;flex:1}.nav a{font-weight:700;text-decoration:none;padding:9px 10px;border-radius:7px;color:#42536d}.nav a:hover,.nav 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