:root{--purple:#8c6de6;--purple2:#7E5DDD;--bg:#DDE0F4;--soft:#F7F7FC;--soft2:#EEF0FA;--text:#2E2E3A;--muted:#66667A;--line:rgba(140,109,230,.16);--shadow:0 14px 36px rgba(140,109,230,.10);--footer:#4B4A6B}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;font-family:"Microsoft YaHei",Arial,sans-serif;background:linear-gradient(180deg,#DDE0F4 0%,#EEF0FA 52%,#DDE0F4 100%);color:var(--text);line-height:1.8;overflow-x:hidden}a{text-decoration:none;color:inherit}img{display:block;max-width:100%;height:auto}.wrap{max-width:1200px;margin:0 auto;padding:0 20px}.site-header{position:sticky;top:0;z-index:9999;background:rgba(221,224,244,.92);backdrop-filter:blur(10px);box-shadow:0 6px 18px rgba(140,109,230,.08)}.desktop-header{height:78px;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand-logo img{height:50px;object-fit:contain}.nav-core{display:flex;align-items:center;gap:10px;white-space:nowrap}.nav-core a{color:#554B7A;background:rgba(255,255,255,.55);border-radius:999px;padding:10px 18px;font-weight:700;border:1px solid transparent}.nav-core a:hover,.nav-core a.active{color:var(--purple);background:#fff;box-shadow:0 8px 18px 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