:root{
  --bg:#f7f3ee;
  --surface:#fffdfa;
  --surface-soft:#fbf5ef;
  --line:#e7d8cc;
  --line-strong:#dabfaa;
  --text:#2b211c;
  --muted:#75675f;
  --subtle:#96877e;
  --orange:#d97757;
  --orange-hover:#be6247;
  --orange-soft:#f8e7dd;
  --orange-ink:#914228;
  --shadow:0 18px 44px rgba(91,56,35,.08);
}

*{box-sizing:border-box}
html{background:var(--bg);scroll-behavior:smooth}
body{
  margin:0;
  min-height:100vh;
  color:var(--text);
  font-family:Inter,"Segoe UI","Microsoft YaHei",sans-serif;
  background-color:var(--bg);
  background-image:linear-gradient(rgba(132,103,84,.045) 1px,transparent 1px),linear-gradient(90deg,rgba(132,103,84,.045) 1px,transparent 1px),radial-gradient(circle at 50% 0,rgba(217,119,87,.08),transparent 38%);
  background-size:48px 48px,48px 48px,auto;
}

button,input,textarea{font:inherit}
.site-header,footer{width:min(1220px,calc(100% - 48px));margin:auto;display:flex;align-items:center;justify-content:space-between}
.site-header{padding:22px 0 18px}
.header-left{display:flex;align-items:center;gap:28px;min-width:0}
.brand{display:flex;align-items:center;gap:11px;color:var(--text);text-decoration:none}.brand>span{display:grid;place-items:center;width:36px;height:36px;border-radius:11px;background:var(--orange);color:#fff;font-weight:950;box-shadow:0 7px 16px rgba(217,119,87,.2)}.brand b{font-size:14px;white-space:nowrap}
.product-switch{display:flex;align-items:center;gap:5px;padding:5px;border:1px solid var(--line);border-radius:13px;background:rgba(255,253,250,.88);box-shadow:0 5px 15px rgba(73,45,28,.04)}
.product-switch a{display:flex;align-items:center;gap:7px;min-height:34px;padding:8px 12px;border-radius:9px;color:#786c65;text-decoration:none;font-size:11px;font-weight:800;white-space:nowrap}.product-switch a:hover{color:var(--text);background:var(--surface-soft)}.product-switch a.active{color:#fff;background:var(--orange);box-shadow:0 7px 16px rgba(217,119,87,.2)}.product-switch i{width:6px;height:6px;border-radius:50%;background:currentColor}
.service{display:flex;align-items:center;gap:8px;padding:8px 12px;border:1px solid var(--line);border-radius:40px;background:rgba(255,253,250,.78);color:var(--muted);font-size:10px}.service i{width:7px;height:7px;border-radius:50%;background:#dc8b35;box-shadow:0 0 0 4px rgba(220,139,53,.11)}

main{width:min(1000px,calc(100% - 40px));margin:0 auto;padding:30px 0 74px}
.hero{text-align:center;padding:25px 20px 30px}.eyebrow{color:var(--orange-ink);font-size:9px;font-weight:900;letter-spacing:.22em}.hero h1{margin:12px 0 10px;font-size:clamp(40px,5.4vw,60px);letter-spacing:-.055em}.hero h1 em{font-style:normal;color:var(--orange)}.hero p{max-width:680px;margin:0 auto;color:var(--muted);font-size:13px;line-height:1.75}

.feature-tabs{display:grid;grid-template-columns:repeat(3,1fr);gap:6px;padding:6px;border:1px solid var(--line);border-radius:15px;background:rgba(255,253,250,.9);box-shadow:0 12px 30px rgba(91,56,35,.055)}
.feature-tabs button{display:flex;align-items:center;justify-content:center;gap:9px;min-height:47px;border:0;border-radius:10px;background:transparent;color:#766a63;font-size:11px;font-weight:850;cursor:pointer;transition:.18s ease}.feature-tabs button span{font:8px/1 "Cascadia Code",Consolas,monospace;color:#a18f84}.feature-tabs button:hover{color:var(--text);background:var(--surface-soft)}.feature-tabs button.active{color:#fff;background:var(--orange);box-shadow:0 9px 20px rgba(217,119,87,.18)}.feature-tabs button.active span{color:#ffe9df}

.step-rail{display:grid;grid-template-columns:repeat(4,1fr);margin:17px 0;border:1px solid var(--line);border-radius:14px;background:rgba(255,253,250,.84);overflow:hidden}.step-rail>div{display:flex;align-items:center;gap:10px;padding:16px 18px;border-right:1px solid var(--line);color:#8a7b72;font-size:10px}.step-rail>div:last-child{border:0}.step-rail b{font:8px/1 "Cascadia Code",Consolas,monospace}.step-rail .active{color:var(--text);background:var(--orange-soft)}.step-rail .active b{color:var(--orange-ink)}.step-rail .complete{color:#8a5b49;background:#fcf6f1}.step-rail .complete b{color:var(--orange)}

.workspace{border:1px solid var(--line);border-radius:19px;background:var(--surface);box-shadow:var(--shadow);overflow:hidden}.panel{display:none}.panel.active{display:block;animation:rise .22s ease}.panel[hidden]{display:none}@keyframes rise{from{opacity:0;transform:translateY(4px)}}
.panel-heading{display:flex;align-items:flex-start;justify-content:space-between;gap:20px;padding:27px 30px;border-bottom:1px solid var(--line);background:rgba(255,255,255,.38)}.panel-heading>div>span,.tutorial-intro>span,.stage-copy>span{color:var(--orange-ink);font-size:8px;font-weight:900;letter-spacing:.2em}.panel-heading h2{margin:7px 0 6px;font-size:21px;letter-spacing:-.03em}.panel-heading p{margin:0;color:var(--muted);font-size:11px}.channel-badge{padding:7px 10px;border:1px solid #ebc8b6;border-radius:30px;background:#fff4ec;color:#a94d30;font-size:8px;white-space:nowrap}

.form-block{padding:28px 30px 32px}.form-block.compact{min-height:320px}.form-block label{display:block;margin:0 0 9px;color:#50423a;font-size:11px;font-weight:800}.input-wrap{position:relative}.input-wrap input,.identity-input,.form-block textarea{width:100%;border:1px solid #dfd1c7;border-radius:11px;outline:none;background:#fff;color:var(--text);transition:border-color .17s,box-shadow .17s,background .17s}.input-wrap input,.identity-input{height:54px;padding:0 15px}.input-wrap input{padding-right:52px;font:11px "Cascadia Code",Consolas,monospace;letter-spacing:.03em}.input-wrap input:hover,.identity-input:hover,.form-block textarea:hover{border-color:var(--line-strong)}.input-wrap input:focus,.identity-input:focus,.form-block textarea:focus{border-color:var(--orange);box-shadow:0 0 0 3px rgba(217,119,87,.11);background:#fff}.input-wrap>span{position:absolute;right:14px;top:50%;display:grid;place-items:center;width:27px;height:27px;border-radius:8px;background:var(--orange-soft);color:var(--orange-ink);font-weight:900;transform:translateY(-50%)}.form-block textarea{min-height:142px;padding:14px;resize:vertical;font:10px/1.65 "Cascadia Code",Consolas,monospace}.form-block>small{display:block;margin:9px 0 0;color:var(--subtle);font-size:9px}
.notice{margin:22px 0;padding:16px 18px;border:1px solid #edcbb9;border-radius:12px;background:#fff8f1}.notice b{color:#a94d30;font-size:10px}.notice ul{display:grid;gap:7px;margin:10px 0 0;padding-left:18px;color:#715f55;font-size:9px;line-height:1.55}
.primary{display:flex;align-items:center;justify-content:space-between;min-width:180px;margin-top:22px;padding:13px 16px;border:0;border-radius:10px;background:var(--orange);color:#fff;font-size:10px;font-weight:900;cursor:pointer;box-shadow:0 10px 22px rgba(217,119,87,.2);transition:.18s ease}.primary:hover{background:var(--orange-hover);transform:translateY(-1px)}.primary:disabled{background:#cbbcb4;color:#f4efec;box-shadow:none;cursor:not-allowed;transform:none}
.secondary{padding:12px 15px;border:1px solid var(--line);border-radius:10px;background:#fff;color:#5b4a41;font-size:10px;font-weight:850;cursor:pointer}.secondary:hover{border-color:var(--line-strong);background:var(--surface-soft)}
.message{display:none;margin:0 30px 30px;padding:13px 15px;border:1px solid #e9c3b1;border-radius:11px;background:#fff4ed;color:#8c432d;font-size:10px;line-height:1.6}.message.show{display:block}

.claude-stage[hidden]{display:none!important}.stage-copy{margin-bottom:19px}.stage-copy h3{margin:8px 0 7px;font-size:19px;letter-spacing:-.025em}.stage-copy p{margin:0;color:var(--muted);font-size:10px;line-height:1.65}.external-link{display:inline-flex;align-items:center;gap:8px;margin:0 0 20px;padding:10px 13px;border:1px solid #e6bca7;border-radius:10px;background:#fff8f3;color:var(--orange-ink);text-decoration:none;font-size:10px;font-weight:850}.external-link:hover{border-color:var(--orange);background:#fff0e7}.tutorial-cards .external-link{margin:5px 0 0}
.identity-status{display:flex;align-items:center;gap:11px;margin-top:14px;padding:12px 13px;border:1px solid var(--line);border-radius:11px;background:var(--surface-soft)}.identity-status>i{display:grid;place-items:center;flex:0 0 28px;width:28px;height:28px;border-radius:8px;background:#efe6df;color:#8c7e75;font-style:normal;font-size:8px;font-weight:900}.identity-status div{display:grid;gap:3px;min-width:0}.identity-status b{font-size:10px}.identity-status span{color:var(--muted);font-size:9px;overflow-wrap:anywhere}.identity-status.success{border-color:#dfb19b;background:#fff3ec}.identity-status.success>i{background:var(--orange);color:#fff}.identity-status.success b{color:var(--orange-ink)}.identity-status.error{border-color:#e3a99c;background:#fff1ee}.identity-status.error>i{background:#f7d6ce;color:#ad3e2e}
.demo-actions{display:grid;grid-template-columns:120px 1fr;gap:10px;margin-top:22px}.demo-actions .primary{width:100%;margin:0}.demo-summary{display:grid;grid-template-columns:1fr 1fr;gap:10px}.demo-summary>div{min-width:0;padding:14px;border:1px solid var(--line);border-radius:11px;background:var(--surface-soft)}.demo-summary span,.demo-summary b{display:block}.demo-summary span{color:#8d7e75;font-size:8px;letter-spacing:.06em}.demo-summary b{margin-top:7px;color:#46372f;font:10px/1.45 "Cascadia Code",Consolas,monospace;overflow-wrap:anywhere}.demo-summary.single{margin-top:24px}.demo-complete{text-align:center}.demo-mark{display:grid;place-items:center;width:58px;height:58px;margin:0 auto 18px;border:1px solid #e4b9a4;border-radius:50%;background:var(--orange-soft);color:var(--orange);font-size:24px;font-weight:900}.demo-complete h3{margin:10px 0 8px;font-size:22px}.demo-complete>p{max-width:570px;margin:0 auto;color:var(--muted);font-size:11px;line-height:1.7}.restart-demo{width:100%;margin-top:20px}

.tutorial-intro{padding:30px 30px 24px;border-bottom:1px solid var(--line)}.tutorial-intro h2{margin:8px 0 7px;font-size:24px;letter-spacing:-.03em}.tutorial-intro p{margin:0;color:var(--muted);font-size:11px;line-height:1.7}.tutorial-cards{display:grid;gap:14px;padding:24px 30px}.tutorial-cards article{display:grid;grid-template-columns:34px 1fr;gap:15px;padding:20px;border:1px solid #ead2c2;border-radius:15px;background:#fffaf5}.tutorial-number{display:grid;place-items:center;width:30px;height:30px;border-radius:50%;background:var(--orange-soft);color:var(--orange-ink);font:900 11px "Cascadia Code",Consolas,monospace}.tutorial-cards h3{margin:3px 0 12px;color:#914228;font-size:15px}.tutorial-cards ol{display:grid;gap:8px;margin:0;padding-left:20px;color:#5f5149;font-size:10px;line-height:1.65}.tutorial-cards strong{color:var(--orange-ink)}.warning{margin:0 30px 30px;padding:16px 18px;border:1px solid #e7b28f;border-radius:12px;background:#fff5e9;color:#a3492d;font-size:10px;line-height:1.65}

footer{padding:24px 0;border-top:1px solid rgba(218,191,170,.7);color:#9b8b81;font-size:9px}

@media(max-width:760px){
  .site-header{align-items:flex-start;gap:14px;width:min(100% - 36px,1220px);padding-top:19px}.header-left{align-items:flex-start;flex-direction:column;gap:14px}.product-switch{max-width:calc(100vw - 36px);overflow-x:auto}.service{display:none}
  main{width:min(100% - 28px,1000px);padding-top:10px}.hero{padding-top:24px}.feature-tabs button{font-size:9px}.step-rail{grid-template-columns:repeat(2,1fr)}.step-rail>div:nth-child(2){border-right:0}.step-rail>div:nth-child(-n+2){border-bottom:1px solid var(--line)}
  .panel-heading,.form-block,.tutorial-intro{padding-left:20px;padding-right:20px}.tutorial-cards{padding-left:20px;padding-right:20px}.message,.warning{margin-left:20px;margin-right:20px}
}

@media(max-width:480px){
  .brand b{display:none}.product-switch a{padding:8px 10px}.hero h1{font-size:38px}.hero p{font-size:11px}.feature-tabs{grid-template-columns:1fr}.feature-tabs button{justify-content:flex-start;padding-left:18px}.panel-heading{display:block}.channel-badge{display:inline-block;margin-top:13px}.step-rail>div{padding:14px 12px}.primary{width:100%}.demo-actions,.demo-summary{grid-template-columns:1fr}.tutorial-cards article{grid-template-columns:1fr}.tutorial-number{margin-bottom:2px}
}