:root{--bg:#eef3f7;--card:#fff;--ink:#102030;--muted:#607184;--blue:#17344f;--blue2:#2d668f;--line:#d9e3ec;--soft:#f8fafc;--warn:#fff4dd;--warnline:#efc66a;--good:#edf8f2;--goodline:#98cdaa;--danger:#fff0f0;--dangerline:#e69c9c}*{box-sizing:border-box}body{margin:0;font-family:Arial,Helvetica,sans-serif;background:linear-gradient(180deg,#e7eef5,#f8fafc);color:var(--ink)}.wrap{max-width:1240px;margin:auto;padding:28px 16px 60px}.hero{background:linear-gradient(135deg,#102030,#245577);color:white;border-radius:24px;padding:32px;box-shadow:0 20px 46px rgba(16,32,48,.22)}.kicker{text-transform:uppercase;letter-spacing:.08em;font-weight:900;color:#a9d7f2;margin:0 0 8px}h1{margin:0;font-size:38px}.hero p{color:#e8f2f8;line-height:1.5;max-width:920px}.searchPanel{margin-top:22px;display:grid;grid-template-columns:220px 1fr;gap:14px}label{font-weight:900;display:flex;flex-direction:column;gap:7px}select,input{width:100%;min-height:48px;border-radius:14px;border:1px solid #9eb3c4;padding:0 14px;font-size:16px;color:var(--ink)}.tabs,.chips{display:flex;flex-wrap:wrap;gap:10px;margin-top:16px}.tab,.chip{border:1px solid rgba(255,255,255,.36);background:rgba(255,255,255,.12);color:white;border-radius:999px;padding:9px 14px;cursor:pointer;font-weight:900}.tab.active{background:white;color:var(--blue)}.layout{display:grid;grid-template-columns:330px 1fr;gap:18px;margin-top:22px}.side,.main{background:var(--card);border:1px solid var(--line);border-radius:22px;box-shadow:0 14px 34px rgba(16,32,48,.08)}.side{padding:18px;position:sticky;top:14px;align-self:start}.side h2,.main h2{margin:0 0 12px;color:var(--blue)}.list{display:flex;flex-direction:column;gap:9px;max-height:710px;overflow:auto;padding-right:4px}.itemBtn{text-align:left;background:var(--soft);border:1px solid var(--line);border-radius:14px;padding:12px;cursor:pointer}.itemBtn strong{display:block;color:var(--blue);font-size:17px}.itemBtn span{display:block;color:var(--muted);font-size:13px;margin-top:3px}.itemBtn.active{border-color:#7fb1d1;background:#eaf5fc}.main{padding:24px;min-height:680px}.titleRow{display:flex;gap:16px;align-items:flex-start;margin-bottom:18px}.badge{min-width:96px;height:70px;border-radius:18px;background:var(--blue);color:white;display:flex;align-items:center;justify-content:center;font-size:27px;font-weight:900;text-align:center;padding:4px}.titleRow h2{font-size:30px;margin:0}.meta{color:var(--muted);line-height:1.45;margin:4px 0 0}.block{background:var(--soft);border:1px solid var(--line);border-radius:16px;padding:17px;margin-bottom:14px}.block h3{margin:0 0 10px;color:var(--blue);font-size:17px}.block p{line-height:1.48;margin:8px 0}.cards{display:grid;grid-template-columns:1fr 1fr;gap:14px}code{display:block;background:#0f2233;color:#fff;border-radius:12px;padding:14px;overflow-x:auto;font-size:15px;line-height:1.45;white-space:pre-wrap}.table{display:grid;grid-template-columns:130px 1fr;border:1px solid var(--line);border-radius:14px;overflow:hidden}.table div{padding:10px;border-bottom:1px solid var(--line)}.table div:nth-child(odd){font-weight:900;background:#eef4f8}.table div:nth-last-child(-n+2){border-bottom:0}.good{background:var(--good);border-color:var(--goodline)}.warn{background:var(--warn);border-color:var(--warnline)}.danger{background:var(--danger);border-color:var(--dangerline)}.step{display:inline-block;background:white;border:1px solid var(--line);border-radius:12px;padding:10px 12px;font-weight:900;margin:0 8px 8px 0}.sourceTag{display:inline-block;background:#eaf2f8;border:1px solid #bdd5e8;border-radius:999px;padding:7px 10px;font-weight:800;color:#21425c;margin-top:8px}.compareBox{display:grid;grid-template-columns:1fr 1fr;gap:14px}.diagram{background:white;border:1px solid var(--line);border-radius:16px;padding:16px;overflow-x:auto}.diagram svg{width:100%;height:220px}.animBtn{border:1px solid #9eb7ca;border-radius:999px;background:#fff;color:#17344f;padding:8px 12px;font-weight:800;margin-top:8px;cursor:pointer}.shopTip{border-left:6px solid var(--blue2)}.troubleBtn{display:inline-block;border:1px solid #b9ccda;background:#fff;border-radius:999px;padding:8px 11px;margin:0 7px 8px 0;cursor:pointer;font-weight:800;color:#17344f}.troubleAnswer{background:#fff;border:1px dashed #b7c9d8;border-radius:14px;padding:14px;margin-top:10px}.footerRef{font-size:13px;color:#607184;margin-top:18px}@media(max-width:900px){.searchPanel,.layout,.cards,.compareBox{grid-template-columns:1fr}.side{position:relative;top:auto}h1{font-size:30px}.main{padding:18px}.titleRow{flex-direction:column}}