:root{--bg:#E9EAFB;--surface:#fff;--soft:#F5F3FF;--line:#E3DFFC;--brand:#8B63E6;--brand-dark:#6D4BC8;--text:#55516F;--muted:#706C88;--hint:#9995AC;--shadow:0 16px 38px rgba(94,74,166,.14)}*{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}a{color:inherit;text-decoration:none}img{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(139,99,230,.12)}.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:700;position:relative}.nav-core a:hover,.nav-core a.active{color:var(--brand)}.nav-core 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