:root{--bg:#eef1f4;--ink:#17202b;--muted:#74808e;--line:#dce2e7;--dark:#17202b;--blue:#3e6ea8;--green:#4c9d73}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--ink);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",sans-serif}a{color:inherit;text-decoration:none}button{font:inherit}.container{width:min(1100px,92%);margin:auto}
.site-header{height:76px;position:sticky;top:0;z-index:50;background:rgba(238,241,244,.94);backdrop-filter:blur(14px);border-bottom:1px solid var(--line)}.header-inner{height:100%;display:flex;align-items:center;justify-content:space-between}.brand{display:flex;align-items:center;gap:11px}.brand-mark{width:36px;height:40px;background:#17202b;color:#fff;clip-path:polygon(50% 0,100% 18%,92% 72%,50% 100%,8% 72%,0 18%);display:grid;place-items:center;font-size:9px}.brand-copy strong{display:block;font-size:15px}.brand-copy span{font-size:9px;color:#7d8894;letter-spacing:1.6px}.nav{display:flex;gap:24px;align-items:center}.nav a{font-size:10px;color:#697482}.nav a.active{color:#111}.nav-cta{background:#17202b!important;color:#fff!important;padding:10px 14px;border-radius:8px}.mobile-nav{display:none}
.hero{padding:75px 0 56px}.hero-grid{display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center}.eyebrow,.section-kicker{font-size:9px;letter-spacing:2.4px;color:#627996}.hero h1{font-size:54px;letter-spacing:-2px;line-height:1.05;margin:18px 0 0}.hero p{font-size:12px;line-height:2;color:#74808d;margin-top:19px}.hero-actions{display:flex;gap:9px;margin-top:26px}.btn{border:1px solid #d6dde3;background:#fff;padding:10px 14px;border-radius:8px;font-size:10px;cursor:pointer;display:inline-flex;justify-content:center}.btn.primary{background:#17202b;color:#fff;border-color:#17202b}
.shieldviz{height:330px;background:#17202b;border-radius:24px;display:grid;place-items:center;box-shadow:0 30px 80px rgba(40,55,70,.14)}.bigshield{width:160px;height:185px;background:#eef1f4;clip-path:polygon(50% 0,100% 18%,92% 72%,50% 100%,8% 72%,0 18%);display:grid;place-items:center}.bigshield:after{content:"SHA-256";font-size:18px;font-weight:700;color:#17202b}
.section{padding:90px 0}.section-head{display:grid;grid-template-columns:.6fr 1.4fr;gap:50px;margin-bottom:40px}.section-head h2{font-size:34px;letter-spacing:-1px;margin:0}.section-head p{font-size:10px;line-height:2;color:#73808c}.cards{display:grid;grid-template-columns:repeat(3,1fr);gap:15px}.card{background:#fff;border:1px solid var(--line);padding:22px;border-radius:15px}.card b{font-size:10px;color:#5e7aa0}.card h3{font-size:15px;margin-top:28px}.card p{font-size:10px;line-height:1.9;color:#76818d}
.page-hero{padding:54px 0 36px;background:#fff;border-bottom:1px solid var(--line)}.page-hero h1{font-size:40px;letter-spacing:-1.4px;margin:10px 0 0}.page-hero p{font-size:11px;color:#74808d;line-height:1.9;max-width:700px}
.tool-wrap{padding:36px 0 86px}.station{background:#fff;border:1px solid var(--line);border-radius:20px;overflow:hidden;box-shadow:0 24px 65px rgba(40,55,70,.08)}.bar{height:56px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 20px}.bar b{font-size:12px}.bar span{font-size:9px;color:#7f8996}.drop{margin:22px;border:1.5px dashed #cbd3da;border-radius:16px;min-height:240px;display:flex;flex-direction:column;align-items:center;justify-content:center;background:#fafbfc;text-align:center}.drop i{width:58px;height:58px;border-radius:14px;background:#17202b;color:#fff;display:grid;place-items:center;font-style:normal;font-size:20px}.drop h3{font-size:15px;margin:14px 0 0}.drop p{font-size:9px;color:#87919d;margin-top:6px}.filebtn{margin-top:14px;background:#17202b;color:#fff;padding:10px 15px;border-radius:8px;font-size:10px;cursor:pointer}.filebtn input{display:none}.meta{display:none;padding:0 22px 22px}.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:9px}.tile{background:#f4f6f8;border-radius:10px;padding:13px}.tile span{font-size:8px;color:#8a949f;display:block}.tile strong{font-size:11px;margin-top:4px;display:block;word-break:break-all}.hash{margin-top:11px;background:#17202b;color:#dae2ea;border-radius:11px;padding:15px}.hash span{font-size:8px;color:#84909e}.hash code{font-size:10px;line-height:1.8;word-break:break-all;display:block;margin-top:5px}.hash .btn{margin-top:9px}
.info-layout{display:grid;grid-template-columns:.75fr 1.25fr;gap:50px}.info-nav{position:sticky;top:100px;align-self:start;border-left:1px solid #cdd5dc}.info-nav a{display:block;padding:8px 13px;font-size:10px;color:#76818e}.prose{background:#fff;border:1px solid var(--line);padding:28px;border-radius:14px}.prose h2{font-size:24px;margin:0 0 12px}.prose h3{font-size:14px;margin:28px 0 9px}.prose p,.prose li{font-size:10px;line-height:2;color:#707c88}.prose ul{padding-left:18px}.info-table{border-top:1px solid var(--line);margin-top:18px}.info-row{display:grid;grid-template-columns:140px 1fr;padding:13px 0;border-bottom:1px solid var(--line);font-size:10px}.info-row span:first-child{color:#87919c}
.site-footer{background:#17202b;color:#7e8996;padding:30px 0 42px}.footer-inner{display:flex;justify-content:space-between}.footer-title{color:#d8e0e8;font-size:11px}.footer-copy,.footer-meta{font-size:9px;line-height:1.9}.footer-meta{text-align:right}.notfound{min-height:100vh;display:grid;place-items:center;text-align:center}.code{font-size:100px;color:#d7dde2}
@media(max-width:850px){.nav{display:none}.mobile-nav{display:block;font-size:10px}.hero-grid,.section-head,.info-layout{grid-template-columns:1fr}.hero h1{font-size:40px}.cards{grid-template-columns:1fr}.grid{grid-template-columns:1fr}.info-nav{display:none}}