:root{--red:#D60000;--deep:#A90000;--bg:#F4F5F7;--soft:#EEF1F5;--text:#1D222B;--muted:#5B6472;--line:rgba(20,28,40,.08);--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(--text);font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif;line-height:1.75;padding-top:118px}a{text-decoration:none;color:inherit}.container{width:min(1180px,calc(100% - 36px));margin:auto}.site-header{position:fixed;inset:0 0 auto;z-index:100;background:rgba(255,255,255,.96);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:72px}.logo img{max-height:52px;width:auto;display:block}.nav-core{display:flex;align-items:center;gap:22px;white-space:nowrap;flex-wrap:nowrap}.nav-core a{font-weight:600;position:relative;padding:8px 10px}.nav-core a:hover,.nav-core a.active{color:var(--red)}.nav-core 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