*{margin:0;padding:0;box-sizing:border-box}
:root{--fit-a:#dc2626;--fit-b:#a1a1aa;--fit-bg:#0f0f11;--fit-panel:#18181b;--fit-line:#2a2a2f;--fit-ink:#f4f4f5;--fit-mute:#9d9da6}
body{font-family:"Helvetica Neue",Arial,"PingFang SC","Microsoft YaHei",sans-serif;background:var(--fit-bg);color:var(--fit-ink);line-height:1.9;font-size:16px}
a{color:var(--fit-a);text-decoration:none}a:hover{color:#f87171}
.fit-top{position:relative;z-index:5;padding:0 26px;height:60px;display:flex;align-items:center;justify-content:space-between;max-width:1040px;margin:0 auto}
.fit-logo{font-size:17px;font-weight:800;letter-spacing:2px}.fit-logo b{color:var(--fit-a)}
.fit-menu{display:flex;gap:24px;font-size:15px}.fit-menu a{color:var(--fit-mute)}.fit-menu a.on,.fit-menu a:hover{color:var(--fit-a)}
.fit-hero{min-height:64vh;display:flex;flex-direction:column;justify-content:center;padding:40px 26px 90px;background:linear-gradient(165deg,#1c1010 0%,#0f0f11 62%)}
.fit-hero-in{max-width:1040px;margin:0 auto;width:100%}
.fit-kicker{font-size:12.5px;letter-spacing:4px;color:var(--fit-a);margin-bottom:18px}
.fit-hero h1{font-size:42px;font-weight:800;line-height:1.25;letter-spacing:-.5px}
.fit-hero p{margin-top:20px;color:var(--fit-mute);max-width:600px;font-size:16.5px}
.fit-cards{max-width:1040px;margin:-58px auto 0;padding:0 26px;display:grid;grid-template-columns:repeat(3,1fr);gap:14px;position:relative;z-index:6}
.fit-card{background:var(--fit-panel);border:1px solid var(--fit-line);border-radius:12px;padding:22px 20px}
.fit-card .fit-k{font-size:11.5px;letter-spacing:2px;color:var(--fit-a);margin-bottom:10px}
.fit-card h3{font-size:16.5px;font-weight:700;line-height:1.6;margin-bottom:8px}
.fit-card p{font-size:14px;color:var(--fit-mute)}
.fit-body{max-width:1040px;margin:0 auto;padding:44px 26px 6px}
.fit-body h2{font-size:19px;font-weight:700;padding-bottom:12px;border-bottom:1px solid var(--fit-line);margin-bottom:18px}
.fit-row{display:grid;grid-template-columns:76px 1fr;gap:20px;padding:20px 0;border-bottom:1px solid var(--fit-line)}
.fit-row .fit-n{font-size:26px;font-weight:800;color:var(--fit-line);line-height:1}
.fit-row h3{font-size:18px;font-weight:700;line-height:1.6;margin-bottom:8px}
.fit-row p{font-size:14.5px;color:var(--fit-mute)}
.fit-bc{font-size:13px;color:var(--fit-mute);padding:22px 0 0}
.fit-art{max-width:780px;padding:16px 0 40px}
.fit-art h1{font-size:29px;font-weight:800;line-height:1.45;letter-spacing:-.3px;margin-bottom:13px}
.fit-art .fit-m{font-size:13px;color:#77777f;padding-bottom:19px;border-bottom:1px solid var(--fit-line);margin-bottom:26px}
.fit-art h2{font-size:19px;font-weight:700;margin:30px 0 12px;color:#f87171}
.fit-art p{margin-bottom:16px;color:#d4d4d8}
.fit-art ul{margin:0 0 16px 22px;color:#d4d4d8}.fit-art li{margin-bottom:8px}
.fit-note{background:var(--fit-panel);border-left:3px solid var(--fit-a);padding:15px 20px;margin:22px 0;color:#d4d4d8;font-size:15px}
.fit-foot{border-top:1px solid var(--fit-line);margin-top:48px}
.fit-foot-in{max-width:1040px;margin:0 auto;padding:24px 26px;font-size:13px;color:var(--fit-mute);display:flex;justify-content:space-between;flex-wrap:wrap;gap:8px}
@media(max-width:860px){.fit-cards{grid-template-columns:1fr;margin-top:-30px}.fit-hero{min-height:auto;padding-bottom:52px}.fit-hero h1{font-size:28px}.fit-row{grid-template-columns:1fr;gap:8px}.fit-art h1{font-size:23px}}