:root{--red:#d60000;--deep:#980000;--ink:#1d222b;--sub:#5b6472;--muted:#87909e;--bg:#f4f5f7;--panel:#fff;--line:#dde2ea;--soft:#eef1f5;--shadow:0 16px 38px rgba(24,32,46,.08)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:Arial,"Microsoft YaHei",sans-serif;line-height:1.75}a{color:inherit;text-decoration:none}img{display:block;max-width:100%}.wrap{width:min(1180px,calc(100% - 36px));margin:auto}.site-header{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.96);backdrop-filter:blur(10px);border-bottom:1px solid rgba(20,28,40,.08)}.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:72px}.logo img{max-height:52px;width:auto}.nav-core{display:flex;align-items:center;gap:22px;white-space:nowrap}.nav-core a{font-weight:700;position:relative;padding:8px 5px}.nav-core a:hover,.nav-core a.active{color:var(--red)}.nav-core 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