:root{--bg:#E9EAFB;--white:#fff;--soft:#F5F3FF;--line:#E3DFFC;--purple:#8B63E6;--deep:#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;padding-top:116px}a{text-decoration:none;color:inherit}img{max-width:100%;display:block}.container{width:min(1180px,calc(100% - 36px));margin:auto}.site-header{position:fixed;top:0;left:0;right: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{flex:0 0 auto}.logo img{max-height:52px;width:auto}.nav-core{display:flex;align-items:center;gap:22px;white-space:nowrap;flex-wrap:nowrap;margin-left:auto}.nav-core a{font-weight:600;position:relative;padding:10px 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