:root{--deep:#041d2b;--ocean:#073f58;--cyan:#48c8d6;--ice:#dff7f8;--paper:#f4faf9;--ink:#102f3b;--muted:#627983;--coral:#ef745d;--line:#bed7d9;--max:1280px}*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--paper);color:var(--ink);font-family:Inter,"Noto Sans SC","Microsoft YaHei",sans-serif;letter-spacing:0;line-height:1.72}a{color:inherit;text-decoration:none}img{display:block;max-width:100%}.mast{position:absolute;z-index:8;top:0;left:0;right:0;color:white}.mast-inner{max-width:var(--max);margin:auto;padding:24px 28px;display:flex;align-items:center;border-bottom:1px solid rgba(255,255,255,.2)}.logo{font-weight:800;display:flex;gap:10px;align-items:center}.logo i{width:34px;height:20px;background:var(--cyan);clip-path:polygon(0 50%,28% 0,85% 10%,100% 50%,85% 90%,28% 100%);display:block}.nav{margin-left:auto;display:flex;gap:26px;font-size:14px}.nav 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