:root {
    --ink: #1a2c22;
    --ink-2: #5a6a60;
    --accent: #0e7a4f;
    --accent-warm: #c96f2e;
    --paper: #f6f3ec;
    --paper-2: #efe9dd;
    --card: #fffdf7;
    --line: rgba(26,44,34,.16);
    --radius: 10px;
  }
  * { margin: 0; padding: 0; box-sizing: border-box; }
  html { scroll-behavior: smooth; }
  body {
    font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
    color: var(--ink);
    background: var(--paper);
    line-height: 1.6;
    overflow-x: hidden;
    position: relative;
    isolation: isolate;
  }
  h1, h2, .serif { font-family: Georgia, "Songti SC", "SimSun", serif; }
  a { text-decoration: none; color: inherit; }
  .container { max-width: 1160px; margin: 0 auto; padding: 0 24px; }

  /* 页面底层装饰：无文字的浅色压纹线稿，不参与布局和交互 */
  .ambient-pattern {
    position: fixed; inset: 0; z-index: 0; overflow: hidden;
    pointer-events: none; user-select: none; contain: paint;
    background: transparent;
  }
  .ambient-art {
    position: absolute; inset: -4%; width: 108%; height: 108%;
    overflow: visible; opacity: .76;
    transform-origin: 50% 50%;
  }
  .ambient-art path,
  .ambient-art ellipse,
  .ambient-art circle {
    fill: none;
    vector-effect: non-scaling-stroke;
  }
  .ambient-art .emboss-shadow {
    stroke: rgba(170, 132, 75, .13);
    stroke-width: 2.2;
    filter: blur(.15px);
  }
  .ambient-art .emboss-highlight {
    stroke: rgba(255, 255, 255, .68);
    stroke-width: 1.3;
  }
  .ambient-art .ink-line {
    stroke: rgba(14, 122, 79, .09);
    stroke-width: 1.1;
  }
  .ambient-art .warm-line {
    stroke: rgba(201, 111, 46, .105);
    stroke-width: 1.15;
  }
  .ambient-art .node-shadow { fill: rgba(170, 132, 75, .13); stroke: none; }
  .ambient-art .node-highlight { fill: rgba(255, 255, 255, .72); stroke: none; }
  .ambient-art__group-a {
    transform-origin: 14% 22%;
  }
  .ambient-art__group-b {
    transform-origin: 84% 73%;
  }
  header, section, footer { position: relative; z-index: 1; }

  /* ============ 导航栏 ============ */
  nav {
    position: fixed; top: 0; left: 0; right: 0; z-index: 100;
    background: rgba(246,243,236,.9);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--line);
  }
  .nav-inner {
    max-width: 1160px; margin: 0 auto; padding: 0 24px;
    height: 66px; display: flex; align-items: center; justify-content: space-between;
  }
  .logo { display: flex; align-items: center; gap: 12px; font-size: 21px; font-weight: 700; font-family: Georgia, "Songti SC", serif; }
  .logo-icon {
    width: 38px; height: 38px; border-radius: 8px;
    background: #fff; border: 1px solid var(--line);
    padding: 4px; object-fit: contain;
  }
  .nav-links { display: flex; gap: 34px; align-items: center; }
  .nav-links a { color: var(--ink-2); font-size: 14px; transition: color .2s; }
  .nav-links a:hover { color: var(--accent); }
  .btn {
    display: inline-flex; align-items: center; gap: 8px;
    padding: 13px 30px; border-radius: 6px;
    font-size: 15px; font-weight: 600; cursor: pointer; border: none;
    transition: background .2s, color .2s, transform .15s;
  }
  .btn:active { transform: translateY(1px); }
  .btn-primary { background: var(--ink); color: var(--paper); }
  .btn-primary:hover { background: var(--accent); }
  .btn-ghost { background: transparent; color: var(--ink); border: 1px solid var(--ink); }
  .btn-ghost:hover { background: var(--ink); color: var(--paper); }
  .btn-sm { padding: 9px 20px; font-size: 14px; }
  .btn-white { background: var(--paper); color: var(--ink); }
  .btn-white:hover { background: #fff; }
  .btn-outline-light { background: transparent; color: var(--paper); border: 1px solid rgba(246,243,236,.6); }
  .btn-outline-light:hover { background: rgba(246,243,236,.12); }

  /* ============ Hero ============ */
  .hero { padding: 150px 0 90px; position: relative; overflow: hidden; }
  .hero-inner { position: relative; z-index: 1; display: grid; grid-template-columns: 1.05fr 1fr; gap: 64px; align-items: center; }
  .hero-badge {
    display: inline-flex; align-items: center; gap: 8px;
    background: transparent; border: 1px solid var(--line);
    padding: 6px 16px; border-radius: 999px;
    font-size: 13px; color: var(--ink-2);
    margin-bottom: 26px;
  }
  .hero-badge b { color: var(--accent); font-weight: 600; }
  .hero h1 { font-size: 58px; line-height: 1.25; letter-spacing: 1px; margin-bottom: 22px; font-weight: 700; }
  .hero h1 .hl { color: var(--accent); border-bottom: 4px solid var(--accent-warm); padding-bottom: 2px; }
  .hero p.lead { font-size: 17px; color: var(--ink-2); margin-bottom: 38px; max-width: 500px; }
  .hero-actions { display: flex; gap: 14px; align-items: center; flex-wrap: wrap; }
  .hero-stats { display: flex; gap: 0; margin-top: 52px; border-top: 1px solid var(--line); }
  .hero-stats > div { padding: 20px 32px 0 0; margin-right: 32px; border-right: 1px solid var(--line); }
  .hero-stats > div:last-child { border-right: none; margin-right: 0; padding-right: 0; }
  .hero-stats .num { font-size: 26px; font-weight: 700; font-family: Georgia, serif; color: var(--ink); }
  .hero-stats .lbl { font-size: 13px; color: var(--ink-2); margin-top: 2px; }

  /* 聊天演示 */
  .chat-demo {
    background: var(--card); border: 1px solid var(--line); border-radius: 14px;
    padding: 22px 22px 26px;
    box-shadow: 8px 8px 0 rgba(26,44,34,.08);
    box-sizing: border-box; display: flex; flex-direction: column;
    height: 576px; max-width: 420px; margin-left: auto; width: 100%;
  }
  .chat-demo-header {
    display: flex; align-items: center; flex: 0 0 auto; gap: 10px;
    padding-bottom: 14px; border-bottom: 1px dashed var(--line); margin-bottom: 16px;
  }
  .chat-demo-header > div { min-width: 0; }
  .chat-demo-header .avatar {
    width: 40px; height: 40px; border-radius: 10px;
    background: #fff; border: 1px solid var(--line);
    padding: 4px; object-fit: contain;
  }
  .chat-demo-header .name { font-weight: 600; font-size: 15px; }
  .chat-demo-header .status { font-size: 12px; color: var(--accent); display: flex; align-items: center; gap: 5px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
  .chat-demo-header .status::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--accent); }
  .demo-stage {
    min-height: 0; flex: 1 1 auto; overflow-x: hidden; overflow-y: auto; contain: layout paint;
    display: flex; flex-direction: column; justify-content: flex-start; padding: 2px 2px 4px;
    overscroll-behavior: contain; scrollbar-width: none; -ms-overflow-style: none;
  }
  .demo-stage::-webkit-scrollbar { width: 0; height: 0; display: none; }
  .demo-stage > * { flex-shrink: 0; }
  .demo-stage > :first-child { margin-top: auto; }
  .demo-stage > :last-child { margin-bottom: 0; }
  .msg { max-width: 85%; padding: 11px 15px; border-radius: 12px; font-size: 14px; margin-bottom: 12px; }
  .msg.enter { animation: msgIn .28s ease both; will-change: opacity; }
  .msg.user { background: var(--paper-2); color: var(--ink); border-bottom-left-radius: 3px; align-self: flex-start; }
  .msg.ai { background: var(--accent); color: #f8f5ee; align-self: flex-end; border-bottom-right-radius: 3px; }
  .msg .tag { display: block; font-size: 11px; opacity: .7; margin-top: 6px; }
  @keyframes msgIn { from { opacity: 0; } to { opacity: 1; } }
  .typing { display: inline-flex; gap: 4px; padding: 14px 18px; background: var(--accent); border-radius: 12px; border-bottom-right-radius: 3px; align-self: flex-end; width: fit-content; }
  .typing.enter { animation: msgIn .2s ease both; will-change: opacity; }
  .typing i { width: 6px; height: 6px; border-radius: 50%; background: rgba(255,255,255,.9); animation: blink 1.2s infinite; }
  .typing i:nth-child(2) { animation-delay: .2s; }
  .typing i:nth-child(3) { animation-delay: .4s; }
  @keyframes blink { 0%, 60%, 100% { opacity: .3; } 30% { opacity: 1; } }
  .sys-banner {
    align-self: center; font-size: 12px; color: var(--accent);
    background: rgba(14,122,79,.08); border: 1px solid rgba(14,122,79,.2);
    border-radius: 999px; padding: 5px 14px;
    margin-bottom: 12px; display: flex; align-items: center; gap: 6px;
  }
  .sys-banner.enter { animation: msgIn .28s ease both; will-change: opacity; }
  .sys-banner .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--accent); animation: blink 1s infinite; }
  .idle-bar {
    align-self: center; font-size: 12px; color: #9aa89e;
    display: flex; align-items: center; gap: 6px; margin-bottom: 8px;
  }
  .idle-bar .pulse { width: 8px; height: 8px; border-radius: 50%; border: 2px solid var(--accent); animation: pulse 1.6s infinite; }
  @keyframes pulse { 0% { box-shadow: 0 0 0 0 rgba(14,122,79,.35); } 70% { box-shadow: 0 0 0 8px rgba(14,122,79,0); } 100% { box-shadow: 0 0 0 0 rgba(14,122,79,0); } }

  /* ============ 通用板块 ============ */
  section { padding: 92px 0; }
  .sec-head { max-width: 680px; margin: 0 auto 54px; text-align: center; }
  .sec-tag {
    display: inline-block; font-size: 13px; font-weight: 600; color: var(--accent);
    border: 1px solid rgba(14,122,79,.35); padding: 5px 16px; border-radius: 999px; margin-bottom: 18px;
    letter-spacing: 2px;
  }
  .sec-head h2 { font-size: 38px; letter-spacing: 0.5px; margin-bottom: 14px; }
  .sec-head p { color: var(--ink-2); font-size: 16px; }

  /* ============ 功能卡片 ============ */
  .features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
  .feature-card {
    background: var(--card); border-radius: var(--radius); padding: 30px 26px;
    border: 1px solid var(--line);
    transition: border-color .25s, box-shadow .25s, transform .25s;
  }
  .feature-card:hover {
    border-color: var(--ink); transform: translateY(-4px);
    box-shadow: 6px 6px 0 rgba(26,44,34,.1);
  }
  .feature-icon {
    width: 46px; height: 46px; border-radius: 50%; margin-bottom: 18px;
    display: flex; align-items: center; justify-content: center; font-size: 20px;
    background: var(--paper-2); border: 1px solid var(--line);
  }
  .feature-card h3 { font-size: 17px; margin-bottom: 9px; }
  .feature-card p { font-size: 14px; color: var(--ink-2); }

  /* ============ 工作原理（深色） ============ */
  .how { background: var(--ink); color: var(--paper); }
  .how .sec-head h2 { color: var(--paper); }
  .how .sec-head p { color: #9db3a5; }
  .how .sec-tag { border-color: rgba(246,243,236,.3); color: #b9d6c5; }
  .steps { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
  .step {
    border: 1px solid rgba(246,243,236,.16);
    border-radius: var(--radius); padding: 34px 28px;
    transition: border-color .25s, background .25s;
  }
  .step:hover { border-color: rgba(246,243,236,.45); background: rgba(246,243,236,.03); }
  .step-num {
    font-size: 42px; font-weight: 700; font-family: Georgia, serif;
    color: var(--accent-warm); margin-bottom: 14px;
  }
  .step h3 { font-size: 17px; margin-bottom: 10px; }
  .step p { font-size: 14px; color: #9db3a5; }

  /* ============ 场景 ============ */
  .scenes { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .scene {
    border-radius: var(--radius); padding: 34px 30px; color: var(--ink);
    background: var(--card); border: 1px solid var(--line);
    min-height: 200px; display: flex; flex-direction: column; justify-content: flex-end;
    position: relative; transition: border-color .25s, box-shadow .25s, transform .25s;
  }
  .scene:hover { border-color: var(--ink); transform: translateY(-4px); box-shadow: 6px 6px 0 rgba(26,44,34,.1); }
  .scene .emoji {
    position: absolute; top: 26px; left: 30px;
    width: 44px; height: 44px; border-radius: 50%; background: var(--paper-2);
    border: 1px solid var(--line);
    display: flex; align-items: center; justify-content: center; font-size: 20px;
  }
  .scene h3 { font-size: 19px; margin-bottom: 8px; margin-top: 40px; }
  .scene p { font-size: 14px; color: var(--ink-2); }

  /* ============ 定价 ============ */
  .pricing { background: var(--paper-2); }
  .plans { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; align-items: stretch; }
  .plan {
    background: var(--card); border-radius: var(--radius); padding: 34px 28px;
    border: 1px solid var(--line); display: flex; flex-direction: column;
    transition: border-color .25s, box-shadow .25s, transform .25s;
  }
  .plan:hover { border-color: var(--ink); transform: translateY(-4px); box-shadow: 6px 6px 0 rgba(26,44,34,.1); }
  .plan.featured {
    background: var(--ink); color: var(--paper); border-color: var(--ink);
    position: relative; overflow: hidden;
  }
  .plan.featured:hover { box-shadow: 6px 6px 0 rgba(14,122,79,.35); }
  .plan.featured::after {
    content: "最受欢迎"; position: absolute; top: 18px; right: -36px;
    background: var(--accent-warm); color: #fff; font-size: 12px; font-weight: 600;
    padding: 5px 40px; transform: rotate(45deg);
  }
  .plan h3 { font-size: 18px; margin-bottom: 6px; font-family: Georgia, "Songti SC", serif; }
  .plan .plan-desc { font-size: 13px; color: var(--ink-2); margin-bottom: 20px; }
  .plan.featured .plan-desc { color: #9db3a5; }
  .plan .price { font-size: 40px; font-weight: 700; font-family: Georgia, serif; margin-bottom: 4px; }
  .plan .price small { font-size: 15px; font-weight: 400; color: var(--ink-2); font-family: sans-serif; }
  .plan.featured .price small { color: #9db3a5; }
  .plan ul { list-style: none; margin: 22px 0 30px; flex: 1; border-top: 1px dashed var(--line); padding-top: 16px; }
  .plan.featured ul { border-top-color: rgba(246,243,236,.2); }
  .plan ul li { font-size: 14px; padding: 8px 0 8px 24px; position: relative; color: var(--ink-2); }
  .plan.featured ul li { color: #c9d8cd; }
  .plan ul li::before { content: "✓"; position: absolute; left: 0; color: var(--accent); font-weight: 700; }
  .plan.featured ul li::before { color: var(--accent-warm); }
  .plan .btn { justify-content: center; }
  .plan.featured .btn { background: var(--paper); color: var(--ink); }
  .plan.featured .btn:hover { background: #fff; }

  /* ============ 配套硬件 ============ */
  .hardware-offer {
    background: var(--paper-2);
    padding-top: 18px;
  }
  .hardware-offer .sec-head { margin-bottom: 30px; }
  .hardware-card {
    display: grid;
    grid-template-columns: minmax(220px, .8fr) minmax(0, 1.2fr);
    gap: 34px;
    align-items: stretch;
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 28px;
    box-shadow: 6px 6px 0 rgba(26,44,34,.08);
  }
  .hardware-visual {
    min-height: 270px;
    border: 1px solid rgba(26,44,34,.14);
    border-radius: 10px;
    background: #e9e4d8;
    display: grid;
    place-items: center;
    position: relative;
    overflow: hidden;
    isolation: isolate;
  }
  .hardware-visual::before,
  .hardware-visual::after {
    content: "";
    position: absolute;
    border: 1px solid rgba(14,122,79,.15);
    border-radius: 50%;
    width: 260px;
    height: 170px;
    transform: rotate(-22deg);
  }
  .hardware-visual::before { left: -92px; bottom: -58px; }
  .hardware-visual::after { right: -110px; top: -66px; border-color: rgba(201,111,46,.17); }
  .hardware-device {
    position: relative;
    z-index: 1;
    width: 112px;
    height: 166px;
    border: 2px solid rgba(26,44,34,.78);
    border-radius: 56px 56px 46px 46px;
    background: #fbfaf5;
    box-shadow: 10px 12px 0 rgba(26,44,34,.12);
    transform: rotate(-8deg);
  }
  .hardware-device::before {
    content: "";
    position: absolute;
    top: 0;
    left: 50%;
    width: 1px;
    height: 72px;
    background: rgba(26,44,34,.22);
  }
  .hardware-device::after {
    content: "";
    position: absolute;
    top: 36px;
    left: 50%;
    width: 14px;
    height: 22px;
    margin-left: -7px;
    border: 1px solid rgba(14,122,79,.55);
    border-radius: 8px;
    background: rgba(14,122,79,.12);
  }
  .hardware-visual-label {
    position: absolute;
    left: 16px;
    bottom: 14px;
    z-index: 2;
    font-size: 11px;
    color: var(--ink-2);
    letter-spacing: 1px;
  }
  .hardware-copy { display: flex; flex-direction: column; justify-content: center; min-width: 0; }
  .hardware-kicker {
    display: inline-flex;
    align-self: flex-start;
    border: 1px solid rgba(14,122,79,.28);
    border-radius: 999px;
    padding: 5px 12px;
    color: var(--accent);
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 13px;
  }
  .hardware-copy h3 { font-size: 26px; margin-bottom: 8px; font-family: Georgia, "Songti SC", serif; }
  .hardware-copy .hardware-desc { color: var(--ink-2); font-size: 15px; max-width: 540px; }
  .hardware-price-row { display: flex; align-items: baseline; gap: 12px; flex-wrap: wrap; margin: 22px 0 16px; }
  .hardware-price { font-size: 42px; font-weight: 700; font-family: Georgia, serif; color: var(--ink); }
  .hardware-price small { font-family: inherit; font-size: 15px; font-weight: 400; color: var(--ink-2); }
  .hardware-shipping { color: var(--accent-warm); font-size: 14px; font-weight: 600; }
  .hardware-points { list-style: none; display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 8px 18px; margin: 0 0 20px; }
  .hardware-points li { position: relative; padding-left: 20px; color: var(--ink-2); font-size: 14px; }
  .hardware-points li::before { content: "✓"; position: absolute; left: 0; color: var(--accent); font-weight: 700; }
  .hardware-note { border-top: 1px dashed var(--line); padding-top: 14px; color: var(--ink-2); font-size: 13px; line-height: 1.7; margin-bottom: 20px; }
  .hardware-copy .btn { align-self: flex-start; }

  /* ============ FAQ ============ */
  .faq-list { max-width: 760px; margin: 0 auto; }
  .faq-item {
    background: transparent; border: none; border-bottom: 1px solid var(--line);
    border-radius: 0; margin-bottom: 0;
  }
  .faq-item:first-child { border-top: 1px solid var(--line); }
  .faq-q {
    width: 100%; text-align: left; background: none; border: none; cursor: pointer;
    padding: 22px 4px; font-size: 16px; font-weight: 600; color: var(--ink);
    display: flex; justify-content: space-between; align-items: center; gap: 16px;
    font-family: inherit;
  }
  .faq-q:hover { color: var(--accent); }
  .faq-q .arrow { transition: transform .3s; color: var(--accent); font-size: 13px; flex-shrink: 0; }
  .faq-item.open .faq-q .arrow { transform: rotate(180deg); }
  .faq-a { max-height: 0; overflow: hidden; transition: max-height .3s ease; }
  .faq-a p { padding: 0 4px 22px; font-size: 14px; color: var(--ink-2); }

  /* ============ CTA ============ */
  .cta {
    background: var(--ink); color: var(--paper);
    border-radius: 14px; padding: 72px 48px; text-align: center;
    position: relative; overflow: hidden;
  }
  .cta > * { position: relative; }
  .cta h2 { font-size: 38px; margin-bottom: 14px; }
  .cta p { font-size: 16px; color: #b9d6c5; margin-bottom: 38px; }
  .cta .release-notes {
    max-width: 720px;
    margin: -22px auto 30px;
    color: #d6e8dc;
    font-size: 14px;
    line-height: 1.7;
    white-space: pre-line;
  }
  .cta .hero-actions { justify-content: center; }

  /* ============ 页脚 ============ */
  footer { background: var(--ink); color: #9db3a5; padding: 64px 0 32px; margin-top: 0; border-top: 1px solid rgba(246,243,236,.12); }
  .footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 48px; }
  .footer-grid h4 { color: var(--paper); font-size: 14px; margin-bottom: 18px; letter-spacing: 2px; }
  .footer-grid a { display: block; font-size: 14px; padding: 6px 0; transition: color .2s; }
  .footer-grid a:hover { color: var(--paper); }
  .footer-brand .logo { color: var(--paper); }
  .footer-brand .logo-icon { border-color: rgba(246,243,236,.25); }
  .footer-brand p { font-size: 14px; margin-top: 14px; max-width: 300px; }
  .footer-bottom {
    border-top: 1px solid rgba(246,243,236,.12); padding-top: 28px;
    display: flex; justify-content: space-between; font-size: 13px; flex-wrap: wrap; gap: 12px;
  }

  /* ============ 客服浮窗 ============ */
  body.modal-open { overflow: hidden; }
  .contact-modal { position: fixed; inset: 0; z-index: 1000; display: grid; place-items: center; padding: 20px; }
  .contact-modal[hidden] { display: none; }
  .contact-modal-backdrop { position: absolute; inset: 0; width: 100%; border: 0; background: rgba(16,29,22,.56); cursor: default; }
  .contact-dialog {
    position: relative; z-index: 1; width: min(100%, 410px); max-height: min(720px, calc(100vh - 40px));
    overflow: auto; background: var(--card); border: 1px solid var(--line); border-radius: 12px;
    padding: 34px 32px 30px; text-align: center; box-shadow: 10px 12px 0 rgba(16,29,22,.16);
  }
  .contact-dialog h2 { font-size: 24px; margin: 0 42px 8px; }
  .contact-dialog p { color: var(--ink-2); font-size: 14px; line-height: 1.7; }
  .contact-dialog .contact-qr { display: block; width: min(100%, 250px); aspect-ratio: 1; margin: 22px auto 16px; border: 1px solid var(--line); border-radius: 8px; background: #fff; }
  .contact-dialog .contact-email { display: inline-block; margin-top: 8px; color: var(--accent); font-weight: 600; }
  .modal-close {
    position: absolute; top: 12px; right: 12px; width: 36px; height: 36px; border: 1px solid var(--line);
    border-radius: 50%; background: var(--paper); color: var(--ink); font: inherit; font-size: 25px; line-height: 1; cursor: pointer;
  }
  .modal-close:hover { border-color: var(--accent); color: var(--accent); }

  /* 滚动出现动画 */
  .reveal { opacity: 0; transform: translateY(24px); transition: opacity .7s, transform .7s; }
  .reveal.visible { opacity: 1; transform: none; }

  @media (max-width: 960px) {
    .hero-inner { grid-template-columns: 1fr; }
    .chat-demo { height: 534px; margin: 0 auto; }
    .features-grid, .steps, .plans { grid-template-columns: 1fr; }
    .scenes { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .nav-links { display: none; }
    .hero h1 { font-size: 40px; }
    .sec-head h2, .cta h2 { font-size: 30px; }
    .hero-stats { flex-wrap: wrap; }
    .hero-stats > div { border-right: none; margin-bottom: 12px; }
    .hardware-card { grid-template-columns: 1fr; }
    .hardware-visual { min-height: 230px; }
  }
  @media (max-width: 540px) {
    .chat-demo { height: 520px; padding: 18px 16px 20px; }
    .chat-demo-header { margin-bottom: 12px; }
    .contact-dialog { padding: 30px 22px 24px; }
    .ambient-art { inset: -12%; width: 124%; height: 124%; opacity: .62; }
    .hardware-card { padding: 20px; gap: 22px; }
    .hardware-points { grid-template-columns: 1fr; }
    .hardware-copy h3 { font-size: 23px; }
    .hardware-price { font-size: 36px; }
  }
  @media (prefers-reduced-motion: reduce) {
    .msg.enter, .typing.enter, .sys-banner.enter { animation: none !important; }
  }