:root{--bg:#070b11;--panel:#0d141e;--panel2:#101a27;--line:#243346;--text:#edf3f9;--muted:#8d9bae;--cyan:#64d7ff;--violet:#9d8cff;--green:#63dda1;--red:#ff788f;--yellow:#ffd166}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:radial-gradient(circle at 20% -10%,#10283a 0,transparent 30%),radial-gradient(circle at 100% 0,#1a1530 0,transparent 27%),var(--bg);color:var(--text);font:14px/1.55 Inter,ui-sans-serif,system-ui,-apple-system,Segoe UI,Roboto,Arial,sans-serif}
.shell{max-width:1500px;margin:auto;padding:0 28px}.topbar{height:76px;border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between}.brand{display:flex;gap:12px;align-items:center}.brand-mark{width:34px;height:34px;border:1px solid #426277;border-radius:9px;display:grid;place-items:center;color:var(--cyan);font-weight:800}.brand strong{display:block;font-size:14px;letter-spacing:.02em}.brand span:not(.brand-mark){display:block;color:var(--muted);font-size:11px}.status{font-size:10px;letter-spacing:.12em;color:var(--muted)}.status i{display:inline-block;width:7px;height:7px;border-radius:50%;background:var(--green);margin-right:7px}
.hero{display:grid;grid-template-columns:1.3fr 1fr;gap:40px;padding:58px 0 45px;border-bottom:1px solid var(--line)}.kicker,.nav-head>span,.eyebrow{font-size:10px;letter-spacing:.17em;color:var(--cyan);font-weight:800}.hero h1{font-size:clamp(42px,6vw,78px);line-height:.94;letter-spacing:-.055em;margin:10px 0 18px}.hero h1 em{font-style:normal;color:var(--cyan)}.hero p{max-width:650px;color:var(--muted);font-size:16px}.hero-diagram{align-self:center;background:#09111b;border:1px solid var(--line);border-radius:20px;padding:16px}.hero-diagram svg{width:100%;height:auto}.hero-diagram rect{fill:#101b29;stroke:#2d4057}.hero-diagram .accent{fill:#102b3a;stroke:#4a91ac}.hero-diagram path{stroke:#65778d;stroke-width:2}.hero-diagram text{fill:#edf3f9;text-anchor:middle;font-size:12px;font-weight:800;letter-spacing:.08em}.hero-diagram .s{fill:#8797a9;font-size:9px;font-weight:500}
.layout{display:grid;grid-template-columns:285px minmax(0,1fr);gap:20px;padding:22px 0}.nav{border:1px solid var(--line);background:rgba(13,20,30,.82);border-radius:18px;padding:13px;align-self:start;position:sticky;top:16px;max-height:calc(100vh - 32px);overflow:auto}.nav-head{display:flex;gap:8px;align-items:center}.nav-head input{min-width:0;flex:1;background:#080e16;border:1px solid var(--line);border-radius:8px;color:var(--text);padding:8px 9px;outline:none}.nav-head input:focus{border-color:var(--cyan)}.nav button{display:block;width:100%;text-align:left;border:1px solid transparent;background:transparent;color:var(--muted);padding:10px 11px;border-radius:10px;margin-top:4px;cursor:pointer;font:inherit}.nav button:hover{background:#111d2b;color:var(--text)}.nav button.active{background:#102a39;border-color:#28556a;color:var(--text)}.nav button small{display:block;color:#668092;font-size:9px;letter-spacing:.1em;text-transform:uppercase;margin-bottom:2px}.nav button.active small{color:var(--cyan)}
main{min-width:0}.card{background:rgba(13,20,30,.9);border:1px solid var(--line);border-radius:20px;padding:24px;box-shadow:0 20px 70px #0005}.heading{display:flex;justify-content:space-between;gap:20px;align-items:flex-start}.heading h2{font-size:32px;letter-spacing:-.035em;margin:4px 0}.tag{border:1px solid var(--line);border-radius:99px;padding:7px 10px;color:var(--muted);font-size:10px;white-space:nowrap}.description{color:var(--muted);max-width:900px}.grid{display:grid;grid-template-columns:1.15fr .85fr;gap:15px;margin-top:18px}.panel{background:#090f17;border:1px solid var(--line);border-radius:15px;padding:16px}.panel h3{font-size:12px;text-transform:uppercase;letter-spacing:.11em;margin:0 0 12px;color:#b8c7d8}.controls{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:11px}.field{display:flex;flex-direction:column;gap:6px}.field.full{grid-column:1/-1}.field label{font-size:10px;letter-spacing:.08em;color:#8191a5;text-transform:uppercase}.field input,.field textarea,.field select{width:100%;background:#070c13;border:1px solid #26384d;border-radius:9px;color:var(--text);padding:10px 11px;font:inherit;outline:none}.field textarea{min-height:86px;resize:vertical}.field input:focus,.field textarea:focus,.field select:focus{border-color:var(--cyan)}.actions{display:flex;gap:8px;flex-wrap:wrap;margin-top:13px}.btn{border:1px solid #31536a;background:#102332;color:#e9f5fc;border-radius:9px;padding:10px 14px;cursor:pointer;font:600 12px inherit}.btn:hover{background:#153247}.btn.secondary{background:#0b121b;border-color:var(--line);color:var(--muted)}.result{margin-top:13px;white-space:pre-wrap;word-break:break-word;background:#060a10;border:1px solid #26384d;border-radius:11px;padding:13px;min-height:58px;font:13px/1.7 ui-monospace,SFMono-Regular,Consolas,monospace;color:#d9f3ff}.result.ok{border-color:#2d7056}.result.err{border-color:#6b3040;color:#ff9eb0}.formula{color:#b9c7d7;font:12px/1.8 ui-monospace,SFMono-Regular,Consolas,monospace}.visual{margin-top:15px;background:#080e15;border:1px solid var(--line);border-radius:15px;padding:12px;overflow:auto}.visual svg{display:block;width:100%;min-width:570px}.visual rect{fill:#0f1925;stroke:#2d4057}.visual .hot{fill:#102b39;stroke:#4b91ad}.visual text{fill:#edf3f9;font-size:12px;font-weight:700}.visual .muted{fill:#8292a5;font-size:10px;font-weight:500}.visual line,.visual path{stroke:#61748a;stroke-width:2}.notice{border-left:3px solid var(--yellow);background:#191609;color:#aeb6c0;padding:10px 12px;margin-top:14px}.table{width:100%;border-collapse:collapse}.table th,.table td{border-bottom:1px solid var(--line);padding:8px;text-align:left;font-size:12px}.table th{color:var(--cyan)}.mono{font-family:ui-monospace,SFMono-Regular,Consolas,monospace}.mini-flow{display:grid;grid-template-columns:1fr auto 1fr auto 1fr;gap:8px;align-items:center}.node{padding:13px;border:1px solid var(--line);border-radius:10px;background:#0b131e;text-align:center}.arrow{color:#65788e;font-size:18px}
footer{border-top:1px solid var(--line);padding:20px 0 30px;color:#607083;font-size:11px}
@media(max-width:980px){.hero{grid-template-columns:1fr}.layout{grid-template-columns:1fr}.nav{position:static;max-height:none}.grid{grid-template-columns:1fr}}
@media(max-width:600px){.shell{padding:0 14px}.hero{padding-top:38px}.controls{grid-template-columns:1fr}.field.full{grid-column:auto}.heading{flex-direction:column}.card{padding:17px}.hero h1{font-size:44px}}


@media (max-width: 760px){
  html{font-size:15px}
  body{overflow-x:hidden}
  .shell{width:100%;padding:0 12px}
  .topbar{height:64px}
  .brand{gap:9px}
  .brand-mark{width:32px;height:32px}
  .brand strong{font-size:13px}
  .brand span:not(.brand-mark){font-size:9px}
  .status{display:none}

  .hero{
    display:block;
    padding:28px 2px 24px;
  }
  .kicker{font-size:9px}
  .hero h1{
    font-size:clamp(38px,12vw,52px);
    line-height:.96;
    margin:8px 0 14px;
  }
  .hero p{font-size:14px;line-height:1.55;margin:0}
  .hero-diagram{display:none}

  .layout{
    display:flex;
    flex-direction:column;
    gap:12px;
    padding:14px 0 20px;
  }

  .nav{
    width:100%;
    position:static;
    padding:11px;
    border-radius:15px;
    overflow:hidden;
    max-height:none;
  }
  .nav-head{
    display:grid;
    grid-template-columns:1fr;
    gap:8px;
  }
  .nav-head>span{font-size:9px}
  .nav-head input{
    width:100%;
    min-height:42px;
    padding:10px 12px;
    font-size:15px;
  }
  #navList{
    display:flex;
    gap:7px;
    overflow-x:auto;
    overflow-y:hidden;
    padding:8px 1px 2px;
    scrollbar-width:none;
    -webkit-overflow-scrolling:touch;
  }
  #navList::-webkit-scrollbar{display:none}
  .nav button{
    flex:0 0 auto;
    width:auto;
    min-height:44px;
    margin:0;
    padding:8px 12px;
    border-color:#26384d;
    white-space:nowrap;
    font-size:12px;
  }
  .nav button small{
    display:inline;
    margin:0 6px 0 0;
    font-size:8px;
  }

  .card{
    width:100%;
    padding:15px;
    border-radius:16px;
    box-shadow:0 12px 35px #0004;
  }
  .heading{gap:10px}
  .heading h2{
    font-size:26px;
    line-height:1.05;
    margin:4px 0 9px;
  }
  .tag{
    font-size:9px;
    padding:6px 8px;
  }
  .description{font-size:13px;line-height:1.55}

  .grid{
    display:flex;
    flex-direction:column;
    gap:10px;
    margin-top:14px;
  }
  .panel{
    padding:13px;
    border-radius:13px;
  }
  .panel h3{
    font-size:10px;
    margin-bottom:10px;
  }
  .controls{
    display:flex;
    flex-direction:column;
    gap:10px;
  }
  .field{
    width:100%;
    gap:5px;
  }
  .field label{font-size:9px}
  .field input,
  .field textarea,
  .field select{
    min-height:44px;
    font-size:16px;
    padding:10px 12px;
    border-radius:9px;
  }
  .field textarea{
    min-height:105px;
  }

  .actions{
    display:grid;
    grid-template-columns:1fr 1fr;
    gap:8px;
  }
  .btn{
    width:100%;
    min-height:46px;
    padding:11px 10px;
    font-size:13px;
    border-radius:10px;
  }
  .actions .secondary{
    grid-column:1/-1;
  }

  .result{
    font-size:12px;
    line-height:1.6;
    padding:12px;
    min-height:58px;
    overflow-wrap:anywhere;
  }
  .formula{
    font-size:11px;
    line-height:1.65;
    overflow-wrap:anywhere;
  }

  .visual{
    margin-top:11px;
    padding:8px;
    border-radius:12px;
    overflow:hidden;
  }
  .visual svg{
    width:100%;
    min-width:0;
    max-width:100%;
    height:auto;
  }
  .notice{
    font-size:12px;
    line-height:1.55;
    margin-top:11px;
    padding:9px 10px;
  }

  .mini-flow{
    grid-template-columns:1fr;
    gap:5px;
  }
  .mini-flow .arrow{
    transform:rotate(90deg);
    text-align:center;
    line-height:1;
  }
  .node{padding:11px}

  footer{
    padding:16px 0 25px;
    font-size:10px;
    line-height:1.5;
  }
}

@media (max-width:380px){
  .shell{padding:0 9px}
  .hero h1{font-size:37px}
  .card{padding:12px}
  .nav{padding:9px}
  .nav button{padding:8px 10px}
  .panel{padding:11px}
  .actions{grid-template-columns:1fr}
  .actions .secondary{grid-column:auto}
}

.top-actions{display:flex;align-items:center;gap:12px}
.top-btn{width:38px;height:38px;border-radius:10px;border:1px solid var(--line);background:#0c141e;color:var(--text);cursor:pointer;font-size:18px}
.top-btn:hover{border-color:var(--cyan);background:#102331}
.quickbar{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;padding:18px 0 4px}
.quick-card{border:1px solid var(--line);background:linear-gradient(135deg,rgba(100,215,255,.055),rgba(157,140,255,.035));border-radius:15px;padding:13px 15px;min-width:0}
.quick-card strong{display:block;font-size:20px;letter-spacing:-.02em;margin-top:2px;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.quick-card>span:last-child{color:var(--muted);font-size:10px}
.quick-label{display:block;color:#6f8296;font-size:8px;letter-spacing:.16em;font-weight:800}
.mini-pipeline{display:flex;align-items:center;gap:5px;margin-top:7px}
.mini-pipeline i{width:8px;height:8px;border-radius:50%;background:#5b7287;box-shadow:0 0 0 3px #172431}
.mini-pipeline i:first-child{background:var(--cyan);box-shadow:0 0 0 3px #163141,0 0 15px #64d7ff55}
.mini-pipeline b{height:1px;width:28px;background:#405468}
.history-panel{border:1px solid var(--line);background:rgba(13,20,30,.84);border-radius:18px;padding:18px;margin-bottom:22px}
.history-head{display:flex;justify-content:space-between;align-items:center;gap:15px}
.history-head h2{margin:3px 0 0;font-size:22px}
.history-empty{padding:18px 2px;color:#64768a;font-size:12px}
.history-list{display:grid;grid-template-columns:repeat(3,1fr);gap:9px;margin-top:14px}
.history-item{background:#080e16;border:1px solid var(--line);border-radius:11px;padding:11px}
.history-item .hi-top{display:flex;justify-content:space-between;gap:8px;color:var(--cyan);font-size:10px}
.history-item .hi-body{font:11px/1.5 ui-monospace,SFMono-Regular,Consolas,monospace;color:#c7d5e3;margin-top:6px;overflow-wrap:anywhere}
.history-item .hi-arrow{color:#60758a;padding:0 3px}
.processing{position:relative;overflow:hidden}
.processing:after{content:"";position:absolute;left:-30%;top:0;width:30%;height:2px;background:linear-gradient(90deg,transparent,var(--cyan),transparent);animation:scan .75s ease-out}
@keyframes scan{to{left:100%}}
body.light{--bg:#eef3f7;--panel:#fff;--panel2:#f6f9fb;--line:#cfd9e3;--text:#172230;--muted:#657487;--cyan:#087ea8}
body.light{background:radial-gradient(circle at 20% 0,#d9f5ff,transparent 28rem),#eef3f7}
body.light .top-btn,body.light .nav,body.light .card,body.light .history-panel,body.light .quick-card{background:#ffffff}
body.light .field input,body.light .field textarea,body.light .field select,body.light .result,.light .panel,.light .visual{background:#f7fafc;color:#172230}
body.light .hero-diagram{background:#f7fafc}
@media(max-width:980px){.quickbar{grid-template-columns:repeat(2,1fr)}.history-list{grid-template-columns:1fr 1fr}}
@media(max-width:600px){
  .quickbar{grid-template-columns:repeat(2,1fr);gap:8px;padding-top:12px}
  .quick-card{padding:11px 12px}
  .quick-card strong{font-size:17px}
  .history-head{align-items:flex-start}
  .history-list{grid-template-columns:1fr}
  .history-panel{padding:14px}
  .top-actions .status{display:none}
}

.learn-panel{margin-top:18px;border:1px solid #294156;border-radius:17px;background:linear-gradient(135deg,rgba(100,215,255,.045),rgba(157,140,255,.045));padding:18px}
.learn-head{display:flex;justify-content:space-between;align-items:flex-start;gap:12px}
.learn-head h3{font-size:22px;margin:4px 0 0;letter-spacing:-.025em}
.learn-toggle{border:1px solid var(--line);background:#0b131d;color:var(--muted);border-radius:9px;padding:8px 11px;cursor:pointer}
.learn-purpose{display:grid;grid-template-columns:130px 1fr;gap:12px;margin-top:15px;padding:12px;border:1px solid var(--line);border-radius:11px;background:#080f17}
.learn-purpose b,.learn-example b,.learn-understand b,.exam-strip b{color:var(--cyan);font-size:10px;letter-spacing:.1em;text-transform:uppercase}
.learn-purpose span{color:#c0ccd9;font-size:13px}
.learn-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:12px}
.learn-steps,.learn-detail{border:1px solid var(--line);border-radius:12px;background:#080e15;padding:13px}
.learn-steps h4,.learn-detail h4{margin:0 0 9px;font-size:11px;text-transform:uppercase;letter-spacing:.1em;color:#9eafc0}
.learn-step{display:grid;grid-template-columns:30px 1fr;gap:8px;width:100%;text-align:left;background:transparent;color:#93a3b5;border:1px solid transparent;border-radius:9px;padding:9px 8px;cursor:pointer;font:12px/1.45 inherit}
.learn-step span{color:#5f7a8e;font:700 10px ui-monospace,monospace;padding-top:2px}
.learn-step:hover{background:#0d1823;color:#dbe7f1}
.learn-step.active{background:#102634;border-color:#2c6077;color:#edf6fb}
.learn-step.active span{color:var(--cyan)}
#stepDetail{min-height:92px;border:1px solid #24384b;border-radius:10px;padding:12px;color:#d7e3ed;font-size:13px;line-height:1.6;background:#060b12}
.learn-example,.learn-understand{margin-top:10px;padding:10px;border-radius:9px;background:#0b141e}
.learn-example p,.learn-understand p{margin:4px 0 0;color:#9eacbc;font-size:11px;line-height:1.55}
.exam-strip{margin-top:12px;border-left:3px solid var(--violet);padding:9px 11px;background:#11101d;display:flex;gap:12px;align-items:flex-start}
.exam-strip span{color:#aab6c5;font-size:11px}
#learnBody.collapsed{display:none}
@media(max-width:760px){
 .learn-panel{padding:13px;margin-top:13px}
 .learn-head h3{font-size:18px}
 .learn-purpose{grid-template-columns:1fr;gap:5px}
 .learn-grid{grid-template-columns:1fr}
 .learn-step{min-height:44px;align-items:start;font-size:12px}
 .learn-toggle{min-height:42px}
 .exam-strip{display:block}
 .exam-strip span{display:block;margin-top:5px}
}