*{box-sizing:border-box}
:root{--bg:#05070b;--line:#1d3043;--text:#eef4fa;--muted:#a9b6c5;--cyan:#20c9df;--green:#20dfb0}
html,body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,Segoe UI,Arial,sans-serif}
body{min-height:100vh;background:radial-gradient(circle at 85% 5%,rgba(20,82,104,.30),transparent 30%),linear-gradient(180deg,#05070b 0%,#06101a 100%)}
.about-header{height:82px;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:16px;padding:0 22px;position:sticky;top:0;background:rgba(5,7,11,.94);backdrop-filter:blur(12px);z-index:5}
.back{width:46px;height:46px;border:1px solid #294158;border-radius:12px;display:grid;place-items:center;color:#fff;text-decoration:none;font-size:26px}
.brand-name{font-size:28px;font-weight:800;letter-spacing:8px;color:var(--cyan)}
.brand-sub{font-size:10px;letter-spacing:2px;color:#7d8b9a}
.about-page{width:min(960px,92vw);margin:0 auto;padding:64px 0 50px}
.hero{padding:18px 0 62px}
.eyebrow,.chapter-number{font-size:11px;letter-spacing:3px;color:var(--green);font-weight:700}
.hero h1{font-size:clamp(42px,7vw,72px);line-height:1.02;letter-spacing:-2px;margin:16px 0 0}
.hero h1 span{color:var(--cyan)}
.accent-line{width:78px;height:3px;background:linear-gradient(90deg,#3b82f6,var(--green));margin-top:28px}
.chapter{border-top:1px solid var(--line);padding:52px 0}
.chapter-number{margin-bottom:12px}
.chapter h2{font-size:clamp(30px,5vw,50px);line-height:1.08;letter-spacing:-1px;margin:0 0 25px}
.chapter p,.chapter li{max-width:850px;color:var(--muted);font-size:16px;line-height:1.9}
.chapter p{margin:0 0 20px}
.chapter strong{color:#edf4f9}
.chapter ul{max-width:850px;margin:0;padding-left:24px}
.chapter li{margin:0 0 18px;padding-left:7px}
footer{border-top:1px solid var(--line);padding:22px;text-align:center;color:#6e7d8d;font-size:11px;letter-spacing:1px}
@media(max-width:680px){.about-header{padding:0 15px}.brand-name{font-size:24px;letter-spacing:6px}.about-page{padding-top:42px}.hero h1{font-size:42px}.chapter{padding:43px 0}.chapter h2{font-size:32px}.chapter p,.chapter li{font-size:15px;line-height:1.8}}