:root{--green: #16a34a;--green-dark: #0b7536;--mint: #edfbf2;--ink: #161b19;--muted: #5d6862;--line: #e3e9e6;--soft: #f6f8f7;--container: 1200px;--shadow: 0 20px 60px rgba(21,44,31,.1)}*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:78px}body{margin:0;color:var(--ink);background:#fff;font-family:Inter,PingFang SC,Microsoft YaHei,sans-serif;-webkit-font-smoothing:antialiased}a{color:inherit;text-decoration:none}button{font:inherit}img{display:block;max-width:100%}.container{width:min(var(--container),calc(100% - 64px));margin:0 auto}.nav{position:sticky;z-index:50;top:0;height:78px;border-bottom:1px solid rgba(227,233,230,.86);background:#fffffff2;-webkit-backdrop-filter:blur(14px);backdrop-filter:blur(14px);transition:box-shadow .25s ease}.nav.is-scrolled{box-shadow:0 8px 28px #152c1f12}.nav-inner{height:100%;display:flex;align-items:center}.brand{display:flex;align-items:center;gap:12px;font-size:22px;font-weight:750;letter-spacing:-.02em}.brand 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