:root{--blue:#005c9c;--navy:#063b64;--ink:#152f42;--muted:#647582;--line:#dce5eb;--light:#f3f7fa;--cyan:#28b6d7}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:95px}body{margin:0;font-family:"Microsoft YaHei","PingFang SC",Arial,sans-serif;color:var(--ink);line-height:1.8;background:#fff}a{color:inherit;text-decoration:none}button{font:inherit;cursor:pointer}img{max-width:100%;display:block}button,a{-webkit-tap-highlight-color:transparent}a:focus-visible,button:focus-visible{outline:3px solid #20a3da;outline-offset:5px}.container{width:min(1240px,calc(100% - 80px));margin:auto}.header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.97);border-bottom:1px solid var(--line)}.header-inner{height:94px;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{display:flex;align-items:center;gap:16px}.brand img{width:94px;height:72px;object-fit:contain}.brand span{font-size:15px;font-weight:700;letter-spacing:1px}.brand 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