:root{--bg:#111617;--panel:#1a2223;--line:#354244;--text:#eef4f1;--muted:#9fb0ad;--mint:#8ff0d2;--warn:#ff8c6b;--lime:#d7ff6a}*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font-family:Inter,"Noto Sans SC",sans-serif;letter-spacing:0;line-height:1.65}a{color:inherit;text-decoration:none}button{font:inherit}.shell{min-height:100vh;display:grid;grid-template-columns:270px 1fr}.side{border-right:1px solid var(--line);padding:28px 24px;position:sticky;top:0;height:100vh}.brand{font-weight:900;font-size:19px}.beta-tag{display:inline-block;margin-left:8px;padding:2px 7px;background:var(--lime);color:#111;font-size:10px}.side nav{margin-top:60px}.side a{display:block;padding:12px 0;color:var(--muted)}.side a.active,.side a:hover{color:var(--mint)}.side-foot{position:absolute;bottom:28px;color:var(--muted);font-size:12px}.workspace{padding:38px 42px 80px}.bar{display:flex;justify-content:space-between;align-items:center;border-bottom:1px solid var(--line);padding-bottom:22px}.bar span{color:var(--muted);font-size:13px}.bar a{border:1px solid var(--line);padding:8px 14px}.intro{max-width:960px;padding:72px 0 46px}.intro h1{font-size:clamp(42px,6vw,78px);line-height:1.05;margin:14px 0;letter-spacing:0}.intro p{font-size:18px;color:var(--muted);max-width:730px}.console{display:grid;grid-template-columns:340px 1fr;border:1px solid var(--line);min-height:520px}.symptoms{padding:24px;border-right:1px solid var(--line)}.symptoms h2{font-size:13px;color:var(--muted);text-transform:uppercase}.symptom{width:100%;text-align:left;border:0;border-top:1px solid var(--line);background:none;color:var(--text);padding:17px 4px;cursor:pointer}.symptom:last-child{border-bottom:1px solid var(--line)}.symptom.active{color:var(--mint);padding-left:14px}.result{padding:34px 42px}.result-head{display:flex;justify-content:space-between;gap:20px}.result h2{font-size:30px;margin:0}.status{color:var(--lime);font-size:12px}.steps{margin-top:34px}.step{display:grid;grid-template-columns:36px 1fr;gap:16px;padding:19px 0;border-top:1px solid var(--line)}.step b{color:var(--warn)}.step h3{margin:0 0 5px;font-size:17px}.step p{margin:0;color:var(--muted)}.note{margin-top:30px;padding:18px;border-left:3px solid var(--mint);background:var(--panel);color:var(--muted)}.layers{display:grid;grid-template-columns:repeat(4,1fr);margin-top:70px;border-top:1px solid var(--line);border-left:1px solid var(--line)}.layer{padding:24px;border-right:1px solid var(--line);border-bottom:1px solid var(--line)}.layer b{font-size:12px;color:var(--warn)}.layer h3{font-size:18px}.layer p{color:var(--muted);font-size:14px}.guide{max-width:860px;margin:60px auto}.guide h1{font-size:56px;line-height:1.1}.guide h2{margin-top:50px;color:var(--mint)}.guide p,.guide li{color:var(--muted)}.mobile-head{display:none}
@media(max-width:780px){.shell{display:block}.side{display:none}.mobile-head{display:flex;position:sticky;top:0;z-index:5;background:rgba(17,22,23,.95);backdrop-filter:blur(15px);padding:17px 20px;border-bottom:1px solid var(--line);justify-content:space-between}.workspace{padding:24px 18px 60px}.bar{display:none}.intro{padding:48px 0 28px}.intro h1{font-size:44px}.console{grid-template-columns:1fr}.symptoms{border-right:0;border-bottom:1px solid var(--line);padding:18px}.result{padding:28px 20px}.layers{grid-template-columns:1fr 1fr;margin-top:45px}.guide h1{font-size:42px}}