/* === aisq design system (anti-slop, editorial) === */
    :root {
      --ink:          #0a0a0a;
      --paper:       #fafaf7;
      --paper-2:     #f3f1ea;
      --rule:        #1a1a1a;
      --hairline:    rgba(10,10,10,0.08);
      --muted:       #4a4a4a;
      --soft:        #767676;
      --accent:      #6a29c3;
      --accent-deep: #4a1e8c;
      --success:     #15803d;
      --shadow-soft: 0 1px 0 rgba(10,10,10,0.04);
    }

    *, *::before, *::after { box-sizing: border-box; }
    html { -webkit-text-size-adjust: 100%; }
    body {
      margin: 0;
      font-family: 'Plus Jakarta Sans', system-ui, sans-serif;
      color: var(--ink);
      background: var(--paper);
      font-size: 16px;
      line-height: 1.5;
      -webkit-font-smoothing: antialiased;
      font-feature-settings: 'ss01', 'ss02';
    }
    h1, h2, h3, h4 { color: var(--ink); font-weight: 500; letter-spacing: -0.02em; margin: 0 0 0.5em; line-height: 1.05; }
    h1 { font-weight: 400; letter-spacing: -0.035em; }
    .serif { font-family: 'Instrument Serif', Georgia, serif; font-style: italic; font-weight: 400; }
    a { color: var(--ink); text-decoration: none; }
    a:hover { color: var(--accent); }
    code, .mono { font-family: 'JetBrains Mono', ui-monospace, monospace; }

    .container { max-width: 1180px; margin: 0 auto; padding: 0 32px; }
    .rule { height: 1px; background: var(--hairline); width: 100%; }
    .rule-bold { height: 1px; background: var(--ink); width: 100%; }

    /* === Top bar (floating pill, not edge-glued) === */
    .topbar {
      position: sticky; top: 0; z-index: 50;
      background: rgba(250,250,247,0.85);
      backdrop-filter: saturate(180%) blur(16px);
      -webkit-backdrop-filter: saturate(180%) blur(16px);
    }
    .topbar-inner {
      display: flex; align-items: center; justify-content: space-between;
      height: 72px;
    }
    .brand {
      display: flex; align-items: center; gap: 10px;
      font-size: 20px; font-weight: 600; color: var(--ink);
      letter-spacing: -0.02em;
    }
    .brand-mark {
      width: 32px; height: 32px;
      background: var(--ink);
      color: var(--paper);
      border-radius: 8px;
      display: grid; place-items: center;
      font-weight: 700; font-size: 16px;
      letter-spacing: -0.05em;
    }
    .brand-mark-img {
      height: 44px; width: auto;
      display: block;
    }
    .brand-mark-img-lg {
      height: 56px; width: auto;
      display: block;
    }
    .nav { display: flex; gap: 16px; align-items: center; }
    .nav a { color: var(--ink); font-size: 13px; font-weight: 400; opacity: 0.7; transition: opacity 0.2s; white-space: nowrap; }
    .nav a:hover { opacity: 1; color: var(--ink); }
    .nav-cta { display: flex; gap: 12px; align-items: center; }
    .landing-menu { display: none; position: relative; }
    .landing-menu summary { list-style:none; cursor:pointer; border:1px solid var(--hairline); border-radius:8px; padding:7px 10px; font-weight:700; line-height:1; }
    .landing-menu summary::-webkit-details-marker { display:none; }
    .landing-menu-panel { position:absolute; right:0; top:calc(100% + 10px); width:min(300px, calc(100vw - 32px)); padding:9px; background:#fff; border:1px solid var(--hairline); border-radius:12px; box-shadow:0 18px 40px rgba(10,10,10,.14); }
    .landing-menu-panel a { display:block; padding:10px; border-radius:7px; font-size:14px; opacity:1; }
    .landing-menu-panel a:hover { background:var(--paper-2); }

    /* === Buttons === */
    .btn {
      display: inline-flex; align-items: center; gap: 8px;
      padding: 10px 18px; border-radius: 100px;
      font-size: 14px; font-weight: 500;
      border: 1px solid transparent; cursor: pointer;
      transition: all 0.4s cubic-bezier(0.32, 0.72, 0, 1);
      text-decoration: none;
    }
    .btn-primary { background: var(--ink); color: var(--paper); }
    .btn-primary:hover { background: var(--accent); color: var(--paper); transform: translateY(-1px); }
    .btn-ghost { background: transparent; color: var(--ink); border-color: rgba(10,10,10,0.15); }
    .btn-ghost:hover { border-color: var(--ink); }
    .btn-lg { padding: 14px 26px; font-size: 15px; }
    .btn-sm { padding: 8px 16px; font-size: 13px; }
    .btn .arrow { transition: transform 0.4s cubic-bezier(0.32, 0.72, 0, 1); display: inline-block; }
    .btn:hover .arrow { transform: translateX(3px); }

    /* === Eyebrow tag === */
    .eyebrow {
      display: inline-flex; align-items: center; gap: 8px;
      font-size: 11px; font-weight: 600;
      text-transform: uppercase; letter-spacing: 0.18em;
      color: var(--muted);
      margin-bottom: 24px;
    }
    .eyebrow::before {
      content: '';
      width: 6px; height: 6px;
      background: var(--accent);
      border-radius: 50%;
    }

    /* === Hero (v5: 40% text / 60% chat, чат справа) === */
    .hero {
      padding: 80px 0 96px;
      position: relative;
      overflow: hidden;
    }
    .hero-grid {
      display: grid;
      grid-template-columns: 40% 60%;
      gap: 60px;
      align-items: center;
    }
    .hero h1 {
      font-size: clamp(38px, 4.5vw, 60px);
      letter-spacing: -0.035em;
      line-height: 1.02;
      margin-bottom: 28px;
      font-weight: 400;
    }
    .hero h1 .hl {
      display: inline-block;
      background: var(--ink);
      color: var(--paper);
      padding: 0 12px 4px;
      border-radius: 4px;
    }
    .hero h1 .serif { color: var(--accent); }
    .hero-sub {
      font-size: 17px; line-height: 1.55;
      max-width: 480px; margin: 0 0 32px;
      color: var(--muted);
      font-weight: 400;
    }
    .hero-cta { display: inline-flex; gap: 12px; flex-wrap: wrap; }

    /* Hero chat (правая колонка) */
    .hero-chat {
      background: #fff;
      border: 1px solid var(--hairline);
      border-radius: 16px;
      box-shadow: 0 24px 60px -20px rgba(10,10,10,0.18), 0 1px 3px rgba(10,10,10,0.05);
      overflow: hidden;
      display: flex; flex-direction: column;
      max-height: 620px;
    }
    .chat-pill {
      background: var(--paper-2);
      color: var(--ink);
      font-size: 13px; font-weight: 600;
      padding: 14px 20px;
      text-align: center;
      border-bottom: 1px solid var(--hairline);
      letter-spacing: 0.01em;
    }
    .chat-body {
      padding: 24px 24px 28px;
      display: flex; flex-direction: column;
      gap: 18px;
      overflow-y: auto;
    }
    .msg { max-width: 88%; font-size: 14.5px; line-height: 1.5; }
    .msg-user {
      align-self: flex-end;
      background: var(--ink);
      color: var(--paper);
      padding: 11px 16px;
      border-radius: 14px 14px 4px 14px;
    }
    .msg-agent { align-self: flex-start; }
    .agent-header {
      font-family: 'JetBrains Mono', monospace;
      font-size: 11px; font-weight: 500;
      color: var(--soft);
      margin-bottom: 4px;
      letter-spacing: 0.02em;
    }
    .msg-agent p {
      margin: 0;
      color: var(--ink);
      padding: 2px 0;
    }
    .model-switch {
      display: inline-flex; align-items: center; gap: 10px;
      font-family: 'JetBrains Mono', monospace;
      font-size: 12px; color: var(--soft);
      padding: 8px 14px;
      background: var(--paper-2);
      border: 1px solid var(--hairline);
      border-radius: 8px;
      align-self: center;
    }
    .old-model { text-decoration: line-through; opacity: 0.55; }
    .arrow { color: var(--accent); font-weight: 600; }
    .new-model { color: var(--ink); font-weight: 600; }
    .price {
      margin-left: 6px; padding-left: 10px;
      border-left: 1px solid var(--hairline);
      color: var(--success);
    }

    /* === Section === */
    section { padding: 96px 0; }
    .section-head {
      display: grid;
      grid-template-columns: 1.2fr 1fr;
      gap: 60px;
      align-items: end;
      margin-bottom: 56px;
    }
    .section-title { font-size: clamp(32px, 3.5vw, 48px); letter-spacing: -0.03em; line-height: 1.05; }
    .section-sub { font-size: 16px; color: var(--muted); line-height: 1.5; }

    /* === 3 столпа: модели / поиск / агенты === */
    .pillars-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .pillar {
      padding: 32px 28px;
      background: var(--paper);
      border: 1px solid var(--hairline);
      border-radius: 12px;
    }
    .pillar-num {
      font-family: 'Instrument Serif', serif;
      font-size: 40px; font-style: italic;
      color: var(--accent);
      line-height: 1;
      margin-bottom: 16px;
    }
    .pillar h3 { font-size: 20px; font-weight: 500; margin-bottom: 10px; line-height: 1.2; }
    .pillar p { font-size: 14px; line-height: 1.55; color: var(--muted); margin: 0 0 18px; }
    .pillar-tag {
      display: inline-block;
      font-family: 'JetBrains Mono', monospace;
      font-size: 11px; font-weight: 500;
      padding: 5px 10px;
      background: var(--paper-2);
      border: 1px solid var(--hairline);
      border-radius: 100px;
      color: var(--ink);
    }

    /* === Switching patterns (asymmetric bento) === */
    .bento {
      display: grid;
      grid-template-columns: 1.4fr 1fr 1fr;
      grid-template-rows: auto auto;
      gap: 16px;
    }
    .bento .cell { padding: 32px; }
    .bento .cell-1 { grid-column: 1 / 2; grid-row: 1 / 3; }
    .bento .cell-2 { grid-column: 2 / 3; grid-row: 1 / 2; }
    .bento .cell-3 { grid-column: 3 / 4; grid-row: 1 / 2; }
    .bento .cell-4 { grid-column: 2 / 4; grid-row: 2 / 3; }
    .cell {
      background: var(--paper-2);
      border: 1px solid var(--hairline);
      border-radius: 12px;
    }
    .cell-eyebrow {
      display: flex; justify-content: space-between; align-items: center;
      margin-bottom: 24px;
    }
    .cell-num {
      font-family: 'Instrument Serif', serif;
      font-size: 48px;
      color: var(--ink);
      line-height: 1;
      font-style: italic;
    }
    .cell-tag {
      font-size: 10px; font-weight: 600; text-transform: uppercase;
      letter-spacing: 0.15em;
      color: var(--muted);
      padding: 4px 10px;
      border: 1px solid var(--hairline);
      border-radius: 100px;
    }
    .cell h3 { font-size: 22px; font-weight: 500; margin-bottom: 12px; line-height: 1.2; }
    .cell-1 h3 { font-size: 28px; }
    .cell p { font-size: 14px; line-height: 1.55; color: var(--muted); margin: 0 0 16px; }
    .cell-cost {
      display: inline-flex; align-items: center; gap: 8px;
      padding: 8px 12px;
      background: var(--paper);
      border: 1px solid var(--hairline);
      border-radius: 100px;
      font-size: 12px; color: var(--ink);
    }
    .cell-cost b { color: var(--success); font-weight: 600; }

    /* === Tools (asymmetric, mixed sizes) === */
    .tools {
      display: grid;
      grid-template-columns: repeat(6, 1fr);
      gap: 0;
      border: 1px solid var(--hairline);
      border-radius: 12px;
      overflow: hidden;
    }
    .tool {
      padding: 28px 24px;
      border-right: 1px solid var(--hairline);
      border-bottom: 1px solid var(--hairline);
      min-height: 220px;
      display: flex; flex-direction: column;
      background: var(--paper);
    }
    .tool:nth-child(6n) { border-right: none; }
    .tool:nth-last-child(-n+3) { border-bottom: none; }
    .tool:nth-child(1) { grid-column: span 2; grid-row: span 2; min-height: 440px; background: var(--ink); color: var(--paper); }
    .tool:nth-child(1) h3 { color: var(--paper); }
    .tool:nth-child(1) p { color: rgba(250,250,247,0.6); }
    .tool:nth-child(4) { grid-column: span 2; }
    .tool-glyph {
      font-family: 'Instrument Serif', serif;
      font-size: 32px;
      font-style: italic;
      color: var(--ink);
      margin-bottom: auto;
    }
    .tool:nth-child(1) .tool-glyph { color: var(--accent); font-size: 64px; }
    .tool h3 { font-size: 17px; font-weight: 500; margin-bottom: 6px; }
    .tool p { font-size: 13px; line-height: 1.5; color: var(--muted); margin: 0; }
    .tool .gap { height: 12px; }
    .tool-vs {
      font-size: 11px; color: var(--soft);
      font-family: 'JetBrains Mono', monospace;
      padding-top: 12px;
      margin-top: 12px;
      border-top: 1px solid var(--hairline);
    }
    .tool:nth-child(1) .tool-vs { color: rgba(250,250,247,0.4); border-top-color: rgba(250,250,247,0.15); }
    .tool-vs b { color: var(--ink); font-weight: 600; }
    .tool:nth-child(1) .tool-vs b { color: var(--accent); }

    /* === Comparison table (newspaper-style) === */
    .compare {
      border: 1px solid var(--ink);
      border-radius: 4px;
      overflow: hidden;
    }
    table.cmp { width: 100%; border-collapse: collapse; }
    .cmp th, .cmp td {
      padding: 16px 20px; text-align: left;
      border-bottom: 1px solid var(--hairline);
      font-size: 14px;
    }
    .cmp thead th {
      background: var(--ink); color: var(--paper);
      font-weight: 500; font-size: 12px;
      letter-spacing: 0.1em; text-transform: uppercase;
    }
    .cmp th.aisq, .cmp td.aisq {
      background: var(--paper-2);
      border-left: 2px solid var(--ink);
    }
    .cmp th.aisq { font-weight: 600; }
    .cmp tbody tr:last-child td { border-bottom: none; }
    .check { color: var(--success); font-weight: 700; }
    .cross { color: rgba(10,10,10,0.2); }
    .partial { color: var(--soft); }
    .row-label { color: var(--ink); font-weight: 500; }
    .row-desc { font-size: 12px; color: var(--muted); font-weight: 400; }

    /* === Use cases (numbered editorial) === */
    .cases { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0; border-top: 1px solid var(--ink); }
    .case {
      padding: 32px 28px 32px 0;
      border-right: 1px solid var(--hairline);
    }
    .case:last-child { border-right: none; padding-right: 0; }
    .case:not(:first-child) { padding-left: 28px; }
    .case-num {
      font-family: 'Instrument Serif', serif;
      font-size: 32px;
      color: var(--ink);
      line-height: 1;
      font-style: italic;
      margin-bottom: 20px;
    }
    .case-tag {
      display: inline-block; font-size: 11px; font-weight: 600;
      padding: 4px 10px; border-radius: 4px;
      background: var(--ink); color: var(--paper);
      letter-spacing: 0.1em; text-transform: uppercase;
      margin-bottom: 14px;
    }
    .case h3 { font-size: 22px; font-weight: 500; margin-bottom: 12px; line-height: 1.2; }
    .case-scenario { font-size: 14px; color: var(--muted); line-height: 1.5; margin-bottom: 16px; }
    .case-result {
      padding-top: 16px;
      border-top: 1px solid var(--hairline);
      font-size: 14px;
    }
    .case-result b { color: var(--success); font-weight: 600; }

    /* === Прайс (3 columns, no card highlight, more editorial) === */
    .pricing {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 0;
      border: 1px solid var(--ink);
      border-radius: 4px;
      overflow: hidden;
    }
    .plan {
      padding: 36px 32px;
      border-right: 1px solid var(--hairline);
      background: var(--paper);
    }
    .plan:last-child { border-right: none; }
    .plan.featured { background: var(--ink); color: var(--paper); }
    .plan.featured h3, .plan.featured .plan-price { color: var(--paper); }
    .plan.featured p, .plan.featured li { color: rgba(250,250,247,0.7); }
    .plan.featured li { border-top-color: rgba(250,250,247,0.15); }
    .plan-name {
      display: flex; justify-content: space-between; align-items: center;
      font-size: 12px; font-weight: 600; letter-spacing: 0.15em; text-transform: uppercase;
      color: var(--ink);
      margin-bottom: 24px;
    }
    .plan.featured .plan-name { color: var(--paper); }
    .plan-name .badge {
      font-size: 10px; padding: 3px 8px; border-radius: 100px;
      background: var(--accent); color: var(--paper);
    }
    .plan-name .badge-outline {
      font-size: 10px; padding: 3px 8px; border-radius: 100px;
      border: 1px solid currentColor;
    }
    .plan-price {
      font-family: 'Instrument Serif', serif;
      font-size: 56px; line-height: 1;
      color: var(--ink);
      margin-bottom: 8px;
      font-style: italic;
    }
    .plan-price small { font-family: 'Plus Jakarta Sans', sans-serif; font-style: normal; font-size: 14px; color: var(--muted); margin-left: 6px; }
    .plan-desc { font-size: 14px; color: var(--muted); margin-bottom: 24px; line-height: 1.5; min-height: 60px; }
    .plan-roi {
      font-size: 13px; padding: 10px 14px;
      background: rgba(10,10,10,0.04);
      border-radius: 4px;
      color: var(--ink);
      margin-bottom: 24px;
      line-height: 1.4;
    }
    .plan.featured .plan-roi { background: rgba(250,250,247,0.1); color: var(--paper); }
    .plan ul { list-style: none; padding: 0; margin: 0 0 24px; }
    .plan li {
      padding: 10px 0 10px 18px; position: relative;
      font-size: 13px; color: var(--ink);
      border-top: 1px solid var(--hairline);
    }
    .plan li:first-child { border-top: none; }
    .plan li::before {
      content: '+'; position: absolute; left: 0; top: 10px;
      color: var(--success); font-weight: 700;
    }
    .plan-cta { display: block; text-align: center; }

    /* ===== PAYG BANNER ===== */
    .payg-banner {
      margin-top: 64px;
      padding: 48px 40px 40px;
      border: 1px solid var(--line);
      border-radius: 20px;
      background: linear-gradient(180deg, #faf9f6 0%, #f5f3ee 100%);
      position: relative;
      overflow: hidden;
    }
    .payg-banner::before {
      content: '';
      position: absolute;
      top: -120px;
      right: -120px;
      width: 320px;
      height: 320px;
      background: radial-gradient(circle, rgba(106,41,195,0.08) 0%, transparent 70%);
      pointer-events: none;
    }
    .payg-banner-head { margin-bottom: 32px; }
    .payg-banner-head h3 {
      font-family: 'Instrument Serif', Georgia, serif;
      font-style: italic;
      font-size: 32px;
      line-height: 1.15;
      margin: 8px 0 8px;
      letter-spacing: -0.01em;
    }
    .payg-banner-head p { color: var(--muted); margin: 0; max-width: 540px; }
    .payg-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1px;
      background: var(--line);
      border: 1px solid var(--line);
      border-radius: 12px;
      overflow: hidden;
    }
    .payg-cell {
      background: #ffffff;
      padding: 20px 18px;
      display: flex;
      flex-direction: column;
      gap: 6px;
    }
    .payg-model {
      font-size: 13px;
      font-weight: 500;
      color: var(--ink);
      letter-spacing: -0.01em;
    }
    .payg-cost { display: flex; align-items: baseline; gap: 6px; margin-top: 4px; }
    .payg-price {
      font-size: 22px;
      font-weight: 600;
      color: var(--accent);
      letter-spacing: -0.02em;
    }
    .payg-unit { font-size: 12px; color: var(--muted); }
    .payg-note { font-size: 12px; color: var(--muted); margin-top: 2px; }
    .payg-foot {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 28px;
    }
    .payg-pill {
      display: inline-block;
      padding: 6px 12px;
      border: 1px solid var(--line);
      border-radius: 999px;
      font-size: 12px;
      color: var(--ink);
      background: rgba(255,255,255,0.6);
    }
    @media (max-width: 800px) {
      .payg-grid { grid-template-columns: repeat(2, 1fr); }
      .payg-banner { padding: 32px 24px 28px; }
      .payg-banner-head h3 { font-size: 26px; }
    }
    @media (max-width: 480px) {
      .payg-grid { grid-template-columns: 1fr; }
    }

    /* === Stats strip (between sections, minimal) === */
    .stats {
      border-top: 1px solid var(--ink);
      border-bottom: 1px solid var(--ink);
      padding: 32px 0;
    }
    .stats-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 0; }
    .stat {
      padding: 0 24px;
      border-left: 1px solid var(--hairline);
    }
    .stat:first-child { border-left: none; padding-left: 0; }
    .stat-num {
      font-family: 'Instrument Serif', serif;
      font-size: 40px;
      color: var(--ink);
      line-height: 1;
      font-style: italic;
    }
    .stat-num span { font-family: 'Plus Jakarta Sans', sans-serif; font-style: normal; font-size: 14px; color: var(--muted); margin-left: 4px; }
    .stat-label { font-size: 12px; color: var(--muted); margin-top: 8px; }

    /* === Dark section (terminal) === */
    .dark-section {
      background: var(--ink);
      color: var(--paper);
      padding: 96px 0;
    }
    .dark-section h2 { color: var(--paper); }
    .dark-section .section-sub { color: rgba(250,250,247,0.6); }
    .terminal {
      max-width: 760px; margin: 56px auto 0;
      background: rgba(250,250,247,0.03);
      border: 1px solid rgba(250,250,247,0.15);
      border-radius: 8px;
      padding: 24px 28px;
      font-family: 'JetBrains Mono', monospace;
      font-size: 13px; line-height: 1.75;
    }
    .terminal .prompt { color: var(--accent); }
    .terminal .cmd { color: var(--paper); }
    .terminal .out { color: rgba(250,250,247,0.5); }
    .terminal .ok { color: #4ade80; }
    .terminal .acc { color: #fbbf24; }
    .terminal .cursor { display: inline-block; width: 8px; height: 14px; background: var(--accent); vertical-align: -2px; animation: blink 1s step-end infinite; }
    @keyframes blink { 50% { opacity: 0; } }

    /* === Footer === */
    footer {
      border-top: 1px solid var(--ink);
      padding: 56px 0 32px;
      font-size: 13px;
    }
    .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr 1fr; gap: 32px; margin-bottom: 40px; }
    .footer-col h4 { font-size: 11px; font-weight: 600; color: var(--ink); margin-bottom: 16px; text-transform: uppercase; letter-spacing: 0.15em; }
    .footer-col a { display: block; padding: 4px 0; color: var(--muted); }
    .footer-col a:hover { color: var(--accent); }
    .footer-bottom {
      display: flex; justify-content: space-between;
      padding-top: 24px;
      border-top: 1px solid var(--hairline);
      font-size: 12px; color: var(--muted);
    }
    .footer-badges { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 16px; }
    .footer-badge {
      font-size: 11px; padding: 4px 10px;
      border: 1px solid var(--ink);
      border-radius: 100px;
      font-family: 'JetBrains Mono', monospace;
      color: var(--ink);
    }

    /* === Responsive === */
    @media (max-width: 1040px) {
      .nav { display:none; }
      .landing-menu { display:block; margin-left:auto; }
    }
    @media (max-width: 900px) {
      .hero-grid { grid-template-columns: 1fr; gap: 32px; }
      .section-head { grid-template-columns: 1fr; gap: 16px; }
      .bento { grid-template-columns: 1fr; }
      .bento .cell-1, .bento .cell-2, .bento .cell-3, .bento .cell-4 { grid-column: 1; grid-row: auto; }
      .pillars-grid { grid-template-columns: 1fr; }
      .tools { grid-template-columns: 1fr 1fr; }
      .tool:nth-child(1), .tool:nth-child(4) { grid-column: span 2; min-height: 220px; }
      .tool { border-right: 1px solid var(--hairline); border-bottom: 1px solid var(--hairline); }
      .tool:nth-child(2n) { border-right: none; }
      .tool:nth-last-child(-n+2) { border-bottom: none; }
      .cases { grid-template-columns: 1fr; border-top: 1px solid var(--ink); }
      .case { border-right: none; border-bottom: 1px solid var(--hairline); padding: 24px 0; }
      .case:not(:first-child) { padding-left: 0; }
      .case:last-child { border-bottom: none; }
      .pricing { grid-template-columns: 1fr; }
      .plan { border-right: none; border-bottom: 1px solid var(--hairline); }
      .plan:last-child { border-bottom: none; }
      .stats-row { grid-template-columns: 1fr 1fr; gap: 16px; }
      .stat { border-left: none; padding: 0; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
      .nav { display: none; }
    }
    .brand-logo { height:34px; width:auto; display:block; }

    /* === Value proposition slider === */
    .usp-slider { padding: 80px 0; border-top: 1px solid var(--hairline); }
    .usp-slider-head { max-width: 760px; margin-bottom: 32px; }
    .usp-slider-head h2 { font-size: clamp(30px, 4vw, 46px); max-width: 720px; }
    .usp-slider-head p { color: var(--muted); max-width: 560px; font-size: 16px; }
    .usp-tabs { display: flex; gap: 8px; border-bottom: 1px solid var(--hairline); margin-bottom: 24px; }
    .usp-tabs button { min-height: 44px; padding: 0 14px; border: 0; border-bottom: 2px solid transparent; background: transparent; color: var(--muted); cursor: pointer; font: inherit; font-size: 14px; }
    .usp-tabs button[aria-selected="true"] { color: var(--ink); border-bottom-color: var(--accent); font-weight: 600; }
    .usp-tabs button:focus-visible, .usp-link:focus-visible { outline: 3px solid rgba(106,41,195,.35); outline-offset: 3px; }
    .usp-panel { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(280px, .9fr); gap: 48px; align-items: stretch; min-height: 300px; }
    .usp-copy { padding: 24px 0; }
    .usp-kicker { display: block; margin-bottom: 14px; color: var(--accent); font-size: 12px; font-weight: 600; letter-spacing: .08em; text-transform: uppercase; }
    .usp-copy h3 { font-size: clamp(28px, 3.2vw, 40px); max-width: 560px; }
    .usp-copy p { max-width: 590px; color: var(--muted); font-size: 16px; line-height: 1.65; }
    .usp-link { display: inline-flex; gap: 8px; margin-top: 22px; color: var(--accent-deep); font-weight: 600; }
    .usp-link:hover { color: var(--accent); }
    .usp-visual { border: 1px solid var(--hairline); border-radius: 16px; background: #fff; padding: 32px; min-height: 260px; display: flex; align-items: center; justify-content: center; gap: 12px; box-shadow: var(--shadow-soft); }
    .usp-visual span { color: var(--soft); font-size: 12px; text-transform: uppercase; letter-spacing: .08em; }
    .usp-model-visual { flex-wrap: wrap; align-content: center; }
    .usp-model-visual strong { padding: 10px 14px; border-radius: 9px; background: var(--paper-2); font-size: 15px; }
    .usp-model-visual i { color: var(--accent); font-style: normal; font-size: 20px; }
    .usp-contour-visual { flex-direction: column; background: var(--paper-2); }
    .usp-contour-visual b { padding: 14px 18px; background: var(--ink); color: var(--paper); border-radius: 9px; font-size: 16px; }
    .usp-contour-visual em { color: var(--muted); font-size: 14px; font-style: normal; }
    .usp-agent-visual { flex-wrap: wrap; align-content: center; background: linear-gradient(145deg, #fff, var(--accent-soft)); }
    .usp-agent-visual b { padding: 10px 14px; background: #fff; border: 1px solid var(--hairline); border-radius: 9px; font-size: 14px; }
    @media (max-width: 700px) {
      .usp-slider { padding: 56px 0; }
      .usp-tabs { overflow-x: auto; }
      .usp-tabs button { flex: 1 0 auto; }
      .usp-panel { grid-template-columns: 1fr; gap: 20px; min-height: 0; }
      .usp-copy { padding: 0; }
      .usp-visual { min-height: 190px; padding: 24px; }
    }
    @media (max-width: 520px) {
      .topbar-inner { height:64px; }
      .brand-mark-img { height:38px; }
      .nav-cta .btn-ghost { display:none; }
      .nav-cta .btn { padding:8px 11px; font-size:12px; }
      .container { padding-left:18px; padding-right:18px; }
    }
    @media (prefers-reduced-motion: reduce) { .usp-tabs button, .usp-link { transition: none; } }