:root{--red:#E11D48;--red2:#B3123F;--ink:#20242C;--muted:#667085;--soft:#98A2B3;--bg:#fff;--bg2:#F7F8FA;--bg3:#F2F4F7;--border:rgba(225,29,72,.12);--shadow:0 12px 30px rgba(18,28,45,.08)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:#fff;color:var(--ink);font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif;line-height:1.7}a{color:inherit;text-decoration:none}img{max-width:100%;display:block}button{font:inherit}.container-wide{max-width:1440px;margin:auto;padding-left:24px;padding-right:24px}.site-header{position:sticky;top:0;z-index:1000;background:rgba(255,255,255,.96);backdrop-filter:blur(10px);border-bottom:1px solid rgba(225,29,72,.08)}.header-inner{display:flex;align-items:center;justify-content:space-between;gap:24px;min-height:74px}.logo{flex:0 0 auto}.logo img{max-height:52px;width:auto}.nav-core{display:flex;align-items:center;justify-content:center;gap:8px;white-space:nowrap;flex-wrap:nowrap;flex:1}.nav-core 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