
:root{--ink:#102f43;--muted:#5f7483;--blue:#0879bc;--cyan:#38b7dd;--line:#dbe7ec;--bg:#f3f7f9;--navy:#0b2536;--green:#007447}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:108px}body{margin:0;color:var(--ink);font-family:"Microsoft YaHei","Segoe UI",sans-serif;line-height:1.7;background:white}a{color:inherit;text-decoration:none}button{font:inherit;cursor:pointer}img{max-width:100%;display:block}.container{max-width:1240px;margin:auto;padding:0 34px}.preview-bar{background:#e8f3f7;color:#35596b;text-align:center;font-size:12px;padding:7px 16px}.preview-bar a{text-decoration:underline;margin-left:12px}.header{background:#fffefb;border-bottom:1px solid var(--line);position:sticky;top:0;z-index:5}.nav{display:flex;align-items:center;justify-content:space-between;min-height:84px;gap:25px}.brand{display:flex;align-items:center;gap:16px}.brand img{width:166px;height:53px;object-fit:contain}.brand small{font-size:11px;color:var(--muted);border-left:1px solid 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