:root {
      --bg: #f8f9fa;
      --card: #ffffff;
      --ink: #202124;
      --muted: #5f6368;
      --line: #dadce0;
      --blue: #1a73e8;
      --blue-soft: #e8f0fe;
      --red: #ea4335;
      --yellow: #f9ab00;
      --green: #188038;
      --green-dot: #34a853;
      --sans: Roboto, Arial, sans-serif;
      --mono: "Roboto Mono", ui-monospace, monospace;
    }

    * { box-sizing: border-box; }
    html, body { margin: 0; height: 100%; }
    body {
      font-family: var(--sans);
      background: var(--bg);
      color: var(--ink);
      display: flex;
      flex-direction: column;
      overflow: hidden;
    }

    header {
      height: 64px;
      padding: 0 24px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 16px;
      background: #fff;
      border-bottom: 1px solid var(--line);
    }
    .brand { font-weight: 500; font-size: 18px; color: var(--ink); }
    .brand .word { display: flex; align-items: center; gap: 8px; }
    .dots { display: inline-flex; gap: 4px; }
    .dots i {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      display: block;
    }
    .dots i:nth-child(1) { background: #4285f4; }
    .dots i:nth-child(2) { background: #ea4335; }
    .dots i:nth-child(3) { background: #fbbc04; }
    .dots i:nth-child(4) { background: #34a853; }
    .brand small {
      display: block;
      font-weight: 400;
      font-size: 12px;
      color: var(--muted);
      margin-top: 2px;
      margin-left: 52px;
    }
    .rail {
      display: flex;
      gap: 4px;
      background: var(--bg);
      border-radius: 8px;
      padding: 4px;
    }
    .rail button {
      font: 500 14px/1 var(--sans);
      color: var(--muted);
      background: transparent;
      border: 0;
      border-radius: 6px;
      padding: 10px 16px;
      cursor: pointer;
    }
    .rail button.active {
      background: var(--blue);
      color: #fff;
    }
    .count {
      font-family: var(--mono);
      font-size: 12px;
      color: var(--muted);
      min-width: 52px;
      text-align: right;
    }

    main {
      flex: 1;
      position: relative;
      margin: 0 18px 18px;
    }
    .slide {
      display: none;
      position: absolute;
      inset: 0;
      background: var(--card);
      border: 1px solid var(--line);
      border-radius: 8px;
      padding: 40px 48px 32px;
      flex-direction: column;
    }
    .slide.active { display: flex; }

    .chrome {
      display: flex;
      justify-content: space-between;
      font-family: var(--mono);
      font-size: 12px;
      color: var(--muted);
    }
    .center {
      flex: 1;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      text-align: center;
    }
    h1 {
      margin: 0;
      font-size: 84px;
      font-weight: 400;
      letter-spacing: -0.02em;
      line-height: 0.95;
    }
    .sub { margin: 18px 0 0; font-size: 22px; color: var(--muted); font-weight: 500; }
    .path {
      margin-top: 28px;
      font-family: var(--mono);
      font-size: 13px;
      color: var(--blue);
    }

    .stage {
      flex: 1;
      display: flex;
      flex-direction: column;
      justify-content: center;
    }
    .kicker {
      font-family: var(--mono);
      font-size: 12px;
      color: var(--blue);
      margin: 0 0 18px;
    }
    h2 {
      margin: 0;
      font-size: 52px;
      font-weight: 400;
      letter-spacing: -0.02em;
      line-height: 1.02;
    }

    .split {
      flex: 1;
      display: grid;
      grid-template-columns: 1.15fr 0.85fr;
      gap: 48px;
      align-items: center;
    }
    .why {
      border-left: 1px solid var(--line);
      padding-left: 36px;
    }
    .why p {
      margin: 0 0 18px;
      display: grid;
      grid-template-columns: 40px 1fr;
      gap: 14px;
      align-items: center;
      font-size: 20px;
      line-height: 1.3;
      letter-spacing: 0;
      font-weight: 500;
    }
    .why p:last-child { margin: 0; }
    .why .detail {
      display: block;
      margin-top: 4px;
      color: var(--muted);
      font-weight: 400;
      font-size: 15px;
    }

    .cards {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 14px;
    }
    .cards.quad { grid-template-columns: 1fr 1fr; }
    .card {
      background: var(--bg);
      border: 1px solid var(--line);
      border-radius: 8px;
      padding: 22px 22px 26px;
      min-height: 220px;
    }
    .card.slim { min-height: 0; padding: 18px 18px 20px; }
    .card.slim h3 { margin: 16px 0 8px; font-size: 20px; }
    .signals {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 18px;
    }
    .cards.quad .card:nth-child(1) { border-top: 4px solid #4285f4; }
    .cards.quad .card:nth-child(2) { border-top: 4px solid #ea4335; }
    .cards.quad .card:nth-child(3) { border-top: 4px solid #fbbc04; }
    .cards.quad .card:nth-child(4) { border-top: 4px solid #34a853; }
    .signals span {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-family: var(--sans);
      font-size: 13px;
      font-weight: 500;
      color: var(--blue);
      background: var(--blue-soft);
      border: 0;
      border-radius: 16px;
      padding: 8px 12px;
    }
    .signals svg, .glyph { width: 18px; height: 18px; display: block; }
    .signals svg { width: 14px; height: 14px; }
    .ico {
      width: 36px;
      height: 36px;
      border-radius: 8px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      flex: none;
    }
    .ico.blue { background: #e8f0fe; color: #1a73e8; }
    .ico.red { background: #fce8e6; color: #ea4335; }
    .ico.yellow { background: #fef7e0; color: #e37400; }
    .ico.green { background: #e6f4ea; color: #188038; }
    .card.slim .ico { margin-bottom: 12px; }
    .hero-row {
      margin-top: 36px;
      display: flex;
      gap: 28px;
    }
    .hero-row div { display: flex; flex-direction: column; align-items: center; gap: 8px; }
    .hero-row em { font-style: normal; font-size: 13px; color: var(--muted); font-weight: 500; }
    .product {
      margin: 0;
      background: #fff;
      border: 1px solid var(--line);
      border-radius: 12px;
      overflow: hidden;
      width: min(520px, 46vw);
    }
    .product img {
      display: block;
      width: 100%;
      height: 360px;
      object-fit: cover;
      object-position: top center;
    }
    .product figcaption {
      padding: 8px 12px 10px;
      font-size: 12px;
      color: var(--muted);
      border-top: 1px solid var(--line);
    }
    .quiet {
      margin-top: 28px;
      display: flex;
      align-items: flex-end;
      gap: 10px;
    }
    .quiet i {
      width: 28px;
      height: 36px;
      border-radius: 8px 8px 4px 4px;
      background: #e8eaed;
      display: block;
    }
    .quiet i.up { height: 52px; background: #fce8e6; box-shadow: inset 0 -14px 0 #c72127; }
    .quiet em { margin-left: 8px; font-style: normal; font-size: 13px; color: var(--muted); }
    .shots {
      margin-top: 22px;
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 280px));
      gap: 14px;
      justify-content: center;
      width: min(900px, 100%);
    }
    .product.shot { width: auto; }
    .product.shot img { height: 148px; }
    .product.shot figcaption { text-align: center; }
    .idx {
      font-family: var(--mono);
      font-size: 12px;
      color: var(--blue);
    }
    .card h3, .col h3 {
      margin: 28px 0 12px;
      font-size: 22px;
      letter-spacing: 0;
      font-weight: 500;
    }
    .card p, .row p {
      margin: 0;
      color: #3c4043;
      font-size: 16px;
      line-height: 1.45;
    }
    code {
      font-family: var(--mono);
      font-size: 0.86em;
      color: var(--ink);
    }
    .note {
      margin-top: 18px;
      font-family: var(--mono);
      font-size: 12px;
      color: var(--muted);
    }

    .cols {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 28px;
    }
    .col h3 { margin: 0 0 8px; font-size: 28px; }
    .col .kicker { margin-bottom: 10px; }
    .row {
      display: grid;
      grid-template-columns: 36px 1fr auto;
      gap: 12px;
      align-items: center;
      padding: 12px 0;
      border-top: 1px solid var(--line);
    }
    .row strong {
      display: block;
      font-size: 17px;
      letter-spacing: -0.02em;
      margin-bottom: 2px;
    }
    .tag {
      font-family: var(--mono);
      font-size: 11px;
      color: var(--muted);
    }
    .broke strong { color: var(--red); }
    .col:not(.broke) .kicker { color: var(--green); }
    .col.broke .kicker { color: var(--red); }

    .timeline { display: flex; flex-direction: column; max-width: 880px; }
    .step {
      display: grid;
      grid-template-columns: 40px 1fr;
      gap: 14px;
      align-items: center;
      padding: 12px 0;
      border-top: 1px solid var(--line);
    }
    .step:last-child { border-bottom: 1px solid var(--line); }
    .when { font-family: var(--mono); font-size: 12px; color: var(--muted); }
    .step:nth-child(4n+1) .when { color: #1a73e8; }
    .step:nth-child(4n+2) .when { color: #ea4335; }
    .step:nth-child(4n+3) .when { color: #f9ab00; }
    .step:nth-child(4n+4) .when { color: #188038; }
    .step h3 { margin: 0 0 4px; font-size: 22px; font-weight: 500; letter-spacing: 0; }
    .step p { margin: 0; color: #3c4043; font-size: 16px; line-height: 1.45; }

    .hood h1 { font-size: 64px; white-space: nowrap; }
    .vi { margin: 16px 0 0; font-size: 20px; font-weight: 600; }
    .hint {
      margin-top: auto;
      font-family: var(--mono);
      font-size: 11px;
      color: #94a3b8;
    }