:root{color-scheme:light;--ink:#122c3e;--muted:#5c707b;--blue:#1558d6;--line:#dbe5e9;--bg:#f2f6f8;--teal:#117365}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:Tahoma,'Thonburi',system-ui,sans-serif;font-size:17px;line-height:1.6}header{height:88px;background:#fff;border-bottom:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;padding:0 4vw}a{color:var(--blue);text-decoration:none}.brand{display:flex;gap:14px;align-items:center;color:var(--ink);font-weight:800;letter-spacing:1px}.brand small{display:block;font-size:11px;letter-spacing:2px;color:var(--muted)}.mark{display:grid;place-items:center;width:45px;height:45px;background:var(--ink);color:white;border-radius:13px}nav{display:flex;align-items:center;gap:24px;font-size:15px}main{max-width:1560px;margin:auto;padding:38px 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