:root{--ink:#20213a;--muted:#6f7085;--line:#e7e6f1;--bg:#f7f6fb;--card:#fff;--violet:#6155d9;--violet2:#8d7df0;--pink:#ef7fb4;--teal:#3b9b91;--shadow:0 18px 46px rgba(48,45,88,.10)}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--bg);color:var(--ink);font-family:Inter,"PingFang SC","Microsoft YaHei",Arial,sans-serif;line-height:1.75;overflow-x:hidden}a{color:inherit;text-decoration:none}button{font:inherit}.site-header{position:sticky;top:0;z-index:50;background:rgba(247,246,251,.94);backdrop-filter:blur(16px);border-bottom:1px solid var(--line)}.header-inner{max-width:1120px;height:68px;margin:auto;padding:0 20px;display:flex;align-items:center;gap:22px}.brand{display:flex;align-items:center;gap:10px;min-width:max-content}.brand img{width:34px;height:34px;object-fit:contain}.brand span{display:flex;flex-direction:column;line-height:1.1}.brand strong{font-size:18px}.brand 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