*, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }

    :root {
      --cream:        #f5f1ed;
      --cream-deep:   #ece5dc;
      --white:        #ffffff;
      --text-primary: #0d0a05;
      --text-secondary:#3a3a3a;
      --text-muted:   #777270;
      --brand-red:    #D71920;
      --red-hover:    #b81018;
      --red-deep:     #8e0d13;
      --amber:        #FF9500;
      --amber-deep:   #b35e00;
      --amber-soft:   #FFF3E0;
      --amber-border: #FFD9A0;
      --border-warm:  #E1D2C4;
      --border-tan:   #D4B5A0;
      --red-soft:     rgba(215,25,32,0.07);
      --red-soft-2:   rgba(215,25,32,0.12);
      --focus-ring:   rgba(215,25,32,0.35);
      --success:      #2a8a4c;
      --success-soft: rgba(42,138,76,0.10);
      --radius-sm:    8px;
      --radius-md:    14px;
      --radius-lg:    22px;
      --transition:   220ms cubic-bezier(.2,.7,.2,1);
      --shadow-sm:    0 1px 2px rgba(20,12,4,.04), 0 2px 6px rgba(20,12,4,.04);
      --shadow-md:    0 4px 12px rgba(20,12,4,.06), 0 12px 28px rgba(20,12,4,.06);
    }

    /* ── SKIP TO MAIN CONTENT (Accessibility) ── */
    .skip-link {
      position: absolute;
      top: -40px;
      left: 0;
      background: var(--brand-red);
      color: var(--white);
      padding: 8px 16px;
      text-decoration: none;
      z-index: 100;
      border-radius: 0 0 var(--radius-sm) 0;
      font-weight: 700;
      font-size: 14px;
      transition: var(--transition);
    }
    .skip-link:focus {
      top: 0;
    }

    html { font-size: 15px; -webkit-font-smoothing: antialiased; scroll-behavior: smooth; background: #e7ddd2; }

    body {
      background: var(--cream);
      color: var(--text-primary);
      line-height: 1.75;
      text-wrap: pretty;
      min-width: 375px; /* Mobile-first: minimum 375px */
      margin: 0 auto;
      min-height: 100vh;
    }

    /* Locale-specific fonts */
    html[lang^="en"] body { font-family: 'Noto Sans', ui-sans-serif, system-ui, sans-serif; }
    html[lang^="ja"] body { font-family: 'Noto Sans JP', ui-sans-serif, system-ui, sans-serif; }
    html[lang^="zh"] body { font-family: 'Noto Sans TC', ui-sans-serif, system-ui, sans-serif; }

    /* ── NAV (mobile-first) ── */
    .nav {
      background: var(--white);
      border-bottom: 1px solid var(--border-warm);
      padding: 0 16px;
      height: 54px;
      display: flex;
      align-items: center;
      gap: 8px;
      position: sticky;
      top: 0;
      z-index: 50;
      backdrop-filter: saturate(1.2);
    }
    .nav-logo { display: inline-flex; align-items: center; height: 21px; }
    .nav-logo img { height: 100%; width: auto; display: block; }
    .nav-sep  { color: var(--border-tan); font-size: 18px; }
    .nav-sub  { font-size: 13px; font-weight: 600; color: var(--text-muted); }
    .nav-spacer { flex: 1; }
    .nav-pill {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      font-size: 12px;
      font-weight: 700;
      color: var(--brand-red);
      background: var(--red-soft);
      padding: 5px 11px 5px 9px;
      border-radius: 100px;
      letter-spacing: .02em;
    }
    .nav-pill::before {
      content: "";
      width: 7px; height: 7px;
      border-radius: 50%;
      background: var(--brand-red);
      box-shadow: 0 0 0 0 rgba(215,25,32,.5);
      animation: pulse 2.2s infinite;
    }
    @keyframes pulse {
      0%   { box-shadow: 0 0 0 0 rgba(215,25,32,.45); }
      70%  { box-shadow: 0 0 0 8px rgba(215,25,32,0); }
      100% { box-shadow: 0 0 0 0 rgba(215,25,32,0); }
    }

    /* ── HERO (mobile-first / default) ── */
    .hero {
      position: relative;
      background: #F7EFE9 url('../images/hero.webp') center 75% / 100% auto no-repeat;
      aspect-ratio: 1.6 / 1;
      border-bottom: 1px solid var(--border-warm);
      overflow: hidden;
    }
    .hero::before {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(165deg, rgba(247,239,233,0.8) 15%, rgba(247,239,233,0.5) 40%, rgba(247,239,233,0) 60%);
      pointer-events: none;
    }
    .hero-inner {
      position: absolute;
      inset: 0 0 auto 0;
      display: flex;
      align-items: flex-start;
      padding: 28px 16px 4px;
      pointer-events: auto;
    }
    .hero-text { width: 100%; pointer-events: auto; }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      background: var(--red-soft);
      color: var(--brand-red);
      font-size: 12px;
      font-weight: 700;
      letter-spacing: 0.08em;
      padding: 5px 13px;
      border-radius: 100px;
      margin-bottom: 18px;
    }
    .hero h1 {
      font-size: 25px;
      font-weight: 800;
      line-height: 1.3;
      letter-spacing: -0.4px;
      margin-bottom: 14px;
    }
    .hero h1 em {
      font-style: normal;
      background: linear-gradient(180deg, var(--brand-red), var(--red-deep));
      -webkit-background-clip: text;
      background-clip: text;
      color: transparent;
    }
    .hero p {
      font-size: 14.5px;
      color: var(--text-secondary);
      max-width: none;
    }
    .hero p br { display: none; }

    /* Hero is mobile-first by default */

    /* ── MAIN CONTENT (mobile-first) ── */
    .container { max-width: 760px; margin: 0 auto; padding: 32px 16px 64px; }

    /* ── CONSENT GATE (mobile-first) ── */
    .consent {
      background: var(--white);
      border: 1px solid var(--border-warm);
      border-radius: var(--radius-md);
      padding: 20px;
      margin-bottom: 36px;
      transition: var(--transition);
    }
    .consent.agreed { border-color: var(--success); background: linear-gradient(180deg, var(--white), var(--success-soft)); }
    .consent-head { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
    .consent-head .ch-icon {
      width: 40px; height: 40px; border-radius: 12px;
      background: linear-gradient(160deg, var(--brand-red), var(--red-deep)); color: #fff;
      display: flex; align-items: center; justify-content: center; flex-shrink: 0;
      box-shadow: 0 4px 12px rgba(215,25,32,.2);
    }
    .consent.agreed .consent-head .ch-icon { background: linear-gradient(160deg, var(--success), #1f6b3a); box-shadow: 0 4px 12px rgba(42,138,76,.2); color: #fff; }
    .consent-head .ch-label { font-size: 11px; font-weight: 700; letter-spacing: .14em; text-transform: uppercase; color: var(--brand-red); }
    .consent.agreed .consent-head .ch-label { color: var(--success); }
    .consent-head h2 { font-size: 16px; font-weight: 800; letter-spacing: -.2px; line-height: 1.4; }
    .consent ul { list-style: none; display: flex; flex-direction: column; gap: 10px; margin-bottom: 20px; }
    .consent ul li { font-size: 14px; color: var(--text-secondary); padding-left: 22px; position: relative; line-height: 1.75; }
    .consent ul li::before { content: ""; position: absolute; left: 5px; top: 11px; width: 6px; height: 6px; border-radius: 50%; background: var(--brand-red); }
    .consent ul li a { color: var(--brand-red); text-decoration: none; font-weight: 700; border-bottom: 1px solid currentColor; }
    .consent ul li a:hover { color: var(--red-hover); }
    .consent-check {
      display: flex; align-items: flex-start; gap: 14px;
      padding: 16px; background: var(--cream);
      border-radius: var(--radius-sm); cursor: pointer;
      border: 1px solid transparent; transition: var(--transition);
    }
    .consent-check:hover { background: var(--cream-deep); }
    .consent.agreed .consent-check { background: var(--success-soft); border-color: var(--success); }
    .consent-check input {
      width: 22px; height: 22px;
      cursor: pointer; flex-shrink: 0; margin-top: 2px;
      appearance: none;
      -webkit-appearance: none;
      border-radius: 7px;
      border: 2px solid var(--border-tan);
      background: var(--white);
      position: relative;
      transition: var(--transition);
    }
    .consent-check input:checked {
      background: var(--success);
      border-color: var(--success);
    }
    .consent-check input:checked::after {
      content: "";
      position: absolute;
      left: 50%;
      top: 50%;
      transform: translate(-50%, -50%);
      width: 13px;
      height: 13px;
      background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='3' stroke-linecap='round' stroke-linejoin='round' xmlns='http://www.w3.org/2000/svg'%3E%3Cpolyline points='20 6 9 17 4 12'/%3E%3C/svg%3E");
      background-size: contain;
      background-repeat: no-repeat;
      background-position: center;
    }
    .consent-check label { font-size: 14px; font-weight: 600; cursor: pointer; line-height: 1.7; }

    /* ── SECTION (mobile-first) ── */
    .section { margin-bottom: 44px; position: relative; transition: opacity .3s, filter .3s; scroll-margin-top: 100px; }
    .section.locked { display: none !important; }
    .section.revealed { animation: gateReveal .5s cubic-bezier(.2,.7,.2,1) both; }
    @keyframes gateReveal { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: none; } }

    /* ── NDA GATE NOTICE ── */
    .gate-notice {
      display: flex;
      align-items: center;
      gap: 14px;
      background: var(--cream);
      border: 1px dashed var(--border-tan);
      border-radius: var(--radius-md);
      padding: 20px 22px;
      margin-bottom: 44px;
      font-size: 14.5px;
      font-weight: 600;
      color: var(--text-muted);
      line-height: 1.7;
    }
    .gate-notice .gn-icon {
      flex-shrink: 0;
      width: 38px; height: 38px;
      border-radius: 11px;
      background: var(--red-soft);
      color: var(--brand-red);
      display: flex; align-items: center; justify-content: center;
    }
    .gate-notice strong { color: var(--text-primary); font-weight: 700; }
    .gate-notice[hidden] { display: none; }

    .section-head {
      display: flex;
      align-items: flex-start;
      gap: 12px;
      margin-bottom: 18px;
    }
    .section-badge {
      flex-shrink: 0;
      width: 42px; height: 42px;
      border-radius: 12px;
      background: linear-gradient(160deg, var(--brand-red), var(--red-deep));
      color: #fff;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      line-height: 1;
      box-shadow: 0 4px 12px rgba(215,25,32,.22);
      position: relative;
    }
    .section-badge .step-kicker { font-size: 8px; font-weight: 700; letter-spacing: .14em; opacity: .85; }
    .section-badge .step-no { font-size: 18px; font-weight: 800; margin-top: 1px; }
    .section-head-text { min-width: 0; padding-top: 1px; }
    .section-label {
      font-size: 11px;
      font-weight: 700;
      letter-spacing: 0.14em;
      text-transform: uppercase;
      color: var(--brand-red);
      margin-bottom: 4px;
    }
    .section-title {
      font-size: 19px;
      font-weight: 800;
      letter-spacing: -0.3px;
      line-height: 1.4;
    }
    .section-intro {
      font-size: 14px;
      color: var(--text-secondary);
      margin: 0 0 22px;
      padding-left: 0;
    }

    /* ── SUB-STEP LIST (mobile-first) ── */
    .steps { display: flex; flex-direction: column; gap: 14px; }
    .step {
      background: var(--white);
      border: 1px solid var(--border-warm);
      border-radius: var(--radius-md);
      padding: 18px;
      display: flex;
      gap: 14px;
      align-items: flex-start;
      transition: var(--transition);
    }
    .step:hover { border-color: var(--border-tan); box-shadow: var(--shadow-sm); }
    .step-num {
      flex-shrink: 0;
      width: 28px; height: 28px;
      border-radius: 50%;
      background: var(--cream);
      border: 1.5px solid var(--border-tan);
      color: var(--brand-red);
      font-size: 13px;
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-top: 1px;
    }
    .step-body { min-width: 0; flex: 1; }
    .step-body h3 { font-size: 15px; font-weight: 700; margin-bottom: 6px; letter-spacing: -0.1px; line-height: 1.5; }
    .step-body p { font-size: 14px; color: var(--text-secondary); line-height: 1.8; }
    .step-body p .pill {
      display: inline-block;
      white-space: nowrap;
      background: var(--red-soft);
      color: var(--brand-red);
      font-weight: 700;
      font-size: 13px;
      padding: 1px 8px;
      border-radius: 6px;
      margin: 0 1px;
    }
    .step-body p code {
      font-family: ui-monospace, "SF Mono", Menlo, monospace;
      background: var(--cream-deep);
      padding: 1px 7px;
      border-radius: 5px;
      font-size: 13px;
      color: var(--text-primary);
    }
    .step-body .note {
      margin-top: 10px;
      font-size: 13px;
      color: var(--text-muted);
      background: var(--cream);
      border-left: 3px solid var(--border-tan);
      padding: 9px 14px;
      border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
      line-height: 1.7;
    }
    .step-body .note strong { color: var(--text-primary); font-weight: 700; }

    /* ── WARNING CALLOUT (amber, mobile-first) ── */
    .warning {
      margin-top: 16px;
      background: var(--amber-soft);
      border: 1px solid var(--amber-border);
      border-left: 4px solid var(--amber);
      border-radius: var(--radius-md);
      padding: 14px;
      display: flex;
      gap: 12px;
      align-items: flex-start;
    }
    .warning-icon {
      flex-shrink: 0;
      width: 26px; height: 26px;
      border-radius: 8px;
      background: var(--amber);
      color: #fff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 15px;
      margin-top: 1px;
    }
    .warning-body { min-width: 0; }
    .warning-body .w-title {
      font-size: 12px;
      font-weight: 800;
      letter-spacing: .1em;
      text-transform: uppercase;
      color: var(--amber-deep);
      margin-bottom: 4px;
    }
    .warning-body p { font-size: 13.5px; color: #5a4225; line-height: 1.8; }
    .warning-body p strong { color: var(--amber-deep); font-weight: 800; }
    .warning-body p + p { margin-top: 6px; }

    /* ── PLATFORM TABS (mobile-first) ── */
    .platform-tabs {
      display: flex;
      gap: 6px;
      margin-bottom: 16px;
      background: var(--cream-deep);
      padding: 5px;
      border-radius: var(--radius-md);
    }
    .tab-btn {
      flex: 1;
      padding: 12px 8px;
      background: transparent;
      border: none;
      border-radius: 10px;
      font-size: 13px;
      font-weight: 700;
      font-family: inherit;
      cursor: pointer;
      transition: var(--transition);
      color: var(--text-muted);
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 6px;
      min-height: 44px;
    }
    .tab-btn svg { width: 15px; height: 15px; }
    .tab-btn:hover { color: var(--text-primary); }
    .tab-btn.active { background: var(--white); color: var(--brand-red); box-shadow: var(--shadow-sm); }
    .tab-content { display: none; animation: fadeIn .3s ease; }
    .tab-content.active { display: block; }
    @keyframes fadeIn {
      from { opacity: 0; transform: translateY(4px); }
      to   { opacity: 1; transform: translateY(0); }
    }

    /* ── MOCK ILLUSTRATIONS ── */
    .mock { margin-top: 14px; }
    /* Browser / portal frame */
    .mock-browser {
      border: 1px solid var(--border-warm);
      border-radius: var(--radius-md);
      overflow: hidden;
      background: var(--white);
      box-shadow: var(--shadow-sm);
    }
    .mock-browser-bar {
      display: flex;
      align-items: center;
      gap: 6px;
      padding: 10px 14px;
      background: var(--cream);
      border-bottom: 1px solid var(--border-warm);
    }
    .mock-browser-bar .dot { width: 9px; height: 9px; border-radius: 50%; background: var(--border-tan); }
    .mock-browser-bar .url {
      margin-left: 8px;
      font-size: 11px;
      color: var(--text-muted);
      font-family: ui-monospace, monospace;
      background: var(--white);
      border: 1px solid var(--border-warm);
      border-radius: 100px;
      padding: 3px 12px;
      flex: 1;
      max-width: 280px;
      white-space: nowrap;
      overflow: hidden;
      text-overflow: ellipsis;
    }
    .mock-browser-body { padding: 22px; display: flex; flex-direction: column; align-items: center; gap: 14px; text-align: center; }
    .mock-browser-body .mb-title { font-size: 13px; font-weight: 700; color: var(--text-primary); }
    .mock-cta {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      background: var(--brand-red);
      color: #fff;
      font-size: 13px;
      font-weight: 700;
      padding: 10px 20px;
      border-radius: 100px;
      box-shadow: 0 4px 10px rgba(215,25,32,.2);
    }
    .mock-cta.ghost { background: var(--white); color: var(--brand-red); border: 1.5px solid var(--brand-red); box-shadow: none; }
    .mock-link-row {
      display: flex;
      align-items: center;
      gap: 8px;
      background: var(--cream);
      border: 1px dashed var(--border-tan);
      border-radius: 100px;
      padding: 7px 7px 7px 16px;
      font-size: 11px;
      color: var(--text-muted);
      font-family: ui-monospace, monospace;
      max-width: 100%;
    }
    .mock-link-row .copy-chip {
      background: var(--brand-red);
      color: #fff;
      font-family: 'Noto Sans JP', sans-serif;
      font-size: 11px;
      font-weight: 700;
      padding: 5px 12px;
      border-radius: 100px;
      flex-shrink: 0;
    }

    /* Phone frame (mobile-first) */
    .mock-phone-wrap { display: flex; align-items: stretch; flex-direction: column; gap: 14px; }
    .mock-phone {
      flex-shrink: 0;
      width: 104px;
      align-self: center;
      background: #1a1410;
      border-radius: 22px;
      padding: 8px;
      box-shadow: 0 8px 22px rgba(20,12,4,.22), inset 0 0 0 1.5px #2a2017;
      position: relative;
    }
    .mock-phone::before {
      content: ""; position: absolute; top: 13px; left: 50%; transform: translateX(-50%);
      width: 34px; height: 5px; background: #000; border-radius: 4px; z-index: 2;
    }
    .mock-phone-screen {
      background: linear-gradient(180deg, #fff, #faf6f1);
      border-radius: 15px;
      aspect-ratio: 9 / 17.5;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 10px;
      padding: 16px 12px;
      text-align: center;
    }
    .mock-app-icon {
      width: 46px; height: 46px;
      border-radius: 12px;
      background: linear-gradient(150deg, var(--brand-red), var(--amber));
      display: flex; align-items: center; justify-content: center;
      box-shadow: 0 4px 10px rgba(215,25,32,.28);
    }
    .mock-app-name { font-size: 11px; font-weight: 800; color: var(--text-primary); }
    .mock-app-sub { font-size: 8.5px; font-weight: 600; color: var(--text-muted); letter-spacing: .04em; }
    .mock-app-btn { margin-top: 4px; font-size: 8.5px; font-weight: 800; color: #fff; background: var(--brand-red); border-radius: 100px; padding: 4px 14px; }
    .mock-phone-caption { flex: 1; min-width: 0; text-align: center; }
    .mock-phone-caption .pc-label {
      font-size: 11px; font-weight: 700; letter-spacing: .12em; text-transform: uppercase;
      color: var(--text-muted); margin-bottom: 6px;
    }
    .mock-phone-caption .pc-text { font-size: 14px; font-weight: 500; color: var(--text-secondary); line-height: 1.7; }

    /* ── REAL SCREENSHOT EMBEDS ── */
    .shot {
      margin-top: 14px;
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 9px;
    }
    .shot img {
      display: block;
      height: auto;
      border-radius: 12px;
      border: 1px solid var(--border-warm);
      box-shadow: 0 6px 18px rgba(20,12,4,.10);
      background: #fff;
    }
    .shot.wide img  { width: 100%; max-width: 460px; border-radius: 10px; }
    .shot.card img  { width: 100%; max-width: 100%; }
    .shot.phone img { width: min(64%, 200px); }
    .shot-cap {
      font-size: 11px;
      font-weight: 700;
      letter-spacing: .12em;
      text-transform: uppercase;
      color: var(--text-muted);
      display: inline-flex;
      align-items: center;
      gap: 6px;
    }
    .shot-cap::before {
      content: "";
      width: 5px; height: 5px; border-radius: 50%;
      background: var(--border-tan);
    }

    /* ── LIGHTBOX (tap to enlarge) ── */
    .shot img { cursor: zoom-in; }
    .lightbox {
      position: fixed;
      inset: 0;
      background: rgba(13,10,5,.84);
      display: none;
      align-items: center;
      justify-content: center;
      padding: 28px;
      z-index: 1000;
      cursor: zoom-out;
    }
    .lightbox.open { display: flex; }
    .lightbox img {
      max-width: 100%;
      max-height: 100%;
      width: auto;
      height: auto;
      border-radius: 14px;
      background: #fff;
      box-shadow: 0 24px 70px rgba(0,0,0,.55);
      cursor: default;
      animation: lbIn .22s cubic-bezier(.2,.7,.2,1);
    }
    @keyframes lbIn { from { opacity: 0; transform: scale(.95); } to { opacity: 1; transform: scale(1); } }
    .lightbox-close {
      position: absolute;
      top: 16px; right: 16px;
      width: 42px; height: 42px;
      border-radius: 50%;
      border: none;
      background: rgba(255,255,255,.16);
      color: #fff;
      font-size: 24px;
      line-height: 1;
      cursor: pointer;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: var(--transition);
    }
    .lightbox-close:hover { background: rgba(255,255,255,.28); }

    /* ── TESTING OVERVIEW BOX ── */
    .testing-overview {
      background: var(--white);
      border: 1px solid var(--border-warm);
      border-radius: var(--radius-md);
      padding: 22px 24px;
      margin-bottom: 36px;
    }
    .testing-overview h3 {
      font-size: 14px;
      font-weight: 700;
      letter-spacing: .1em;
      text-transform: uppercase;
      color: var(--text-muted);
      margin-bottom: 14px;
    }
    .testing-overview ol {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
      counter-reset: toc;
    }
    .testing-overview ol li {
      display: flex;
      gap: 12px;
      align-items: flex-start;
      font-size: 14.5px;
      color: var(--text-secondary);
      line-height: 1.7;
      counter-increment: toc;
    }
    .testing-overview ol li::before {
      content: counter(toc);
      flex-shrink: 0;
      width: 22px; height: 22px;
      border-radius: 50%;
      background: var(--cream-deep);
      color: var(--brand-red);
      font-size: 12px;
      font-weight: 800;
      display: flex;
      align-items: center;
      justify-content: center;
      margin-top: 2px;
    }
    .testing-overview ol li strong { color: var(--text-primary); font-weight: 700; }

    /* ── PROGRAM PERIOD BANNER ── */
    .period-banner {
      display: flex;
      align-items: center;
      gap: 12px;
      flex-wrap: wrap;
      background: var(--red-soft);
      border-radius: var(--radius-sm);
      padding: 12px 16px;
      margin-bottom: 16px;
    }
    .period-banner .pb-label {
      font-size: 11px;
      font-weight: 800;
      letter-spacing: .12em;
      text-transform: uppercase;
      color: var(--brand-red);
    }
    .period-banner .pb-dates {
      font-size: 15px;
      font-weight: 700;
      color: var(--text-primary);
    }

    /* ── SUPPORT BOX (mobile-first) ── */
    .support-box {
      background: radial-gradient(80% 100% at 0% 0%, var(--red-soft), transparent 60%), var(--white);
      border: 1px solid var(--border-warm);
      border-radius: var(--radius-md);
      padding: 20px;
      display: flex;
      gap: 14px;
      align-items: flex-start;
    }
    .support-box-icon {
      flex-shrink: 0; width: 44px; height: 44px;
      border-radius: 12px; background: var(--brand-red); color: #fff;
      display: flex; align-items: center; justify-content: center;
    }
    .support-box h3 { font-size: 16px; font-weight: 700; margin-bottom: 6px; }
    .support-box p  { font-size: 14.5px; color: var(--text-secondary); line-height: 1.7; }
    .support-box a  { color: var(--brand-red); text-decoration: none; font-weight: 700; border-bottom: 1px solid currentColor; }
    .support-box a:hover { color: var(--red-hover); }

    /* ── FOOTER ── */
    footer {
      border-top: 1px solid var(--border-warm);
      padding: 32px 24px;
      text-align: center;
      font-size: 13px;
      color: var(--text-muted);
      background: var(--white);
    }
    footer p + p { margin-top: 6px; }

    /* ── TABLET & DESKTOP ENHANCEMENTS (min-width: 768px) ── */
    @media (min-width: 768px) {
      html { font-size: 16px; }

      .nav {
        padding: 0 24px;
        height: 60px;
        gap: 10px;
      }
      .nav-logo { height: 26px; }
      .nav-sub { font-size: 14px; }

      .hero { aspect-ratio: 3 / 1; }
      .hero-inner { padding: 32px 20px 0 32px; }
      .hero h1 { font-size: clamp(28px, 7vw, 38px); line-height: 1.18; }
      .hero p { font-size: 15px; }
      .hero p br { display: inline; }

      .container { padding: 40px 24px 80px; }
      .section { margin-bottom: 52px; }
      .consent { padding: 26px; margin-bottom: 44px; }
      .consent-head h2 { font-size: 19px; }
      .section-head { gap: 16px; margin-bottom: 24px; }
      .section-badge { width: 46px; height: 46px; border-radius: 14px; }
      .section-badge .step-no { font-size: 20px; }
      .section-title { font-size: 23px; }
      .section-intro { font-size: 15px; padding-left: 62px; margin-top: -8px; }

      .step { padding: 22px 24px; gap: 18px; }
      .step-num { width: 30px; height: 30px; font-size: 14px; }
      .step-body h3 { font-size: 16px; }
      .step-body p { font-size: 14.5px; }

      .warning { padding: 16px 18px 16px 16px; gap: 14px; }
      .warning-body p { font-size: 14px; }

      .tab-btn { padding: 12px 16px; font-size: 14px; gap: 8px; }
      .tab-btn svg { width: 16px; height: 16px; }

      .shot.card img { max-width: 340px; }
      .shot.phone img { width: min(58%, 216px); }

      .mock-phone-wrap { flex-direction: row; align-items: center; gap: 22px; }
      .mock-phone { width: 116px; align-self: auto; }
      .mock-phone-caption { text-align: left; }
      .mock-link-row { max-width: 320px; }

      .support-box { padding: 26px; gap: 18px; }
    }

    @media (min-width: 1024px) {
      .hero-inner { padding-left: 56px; }
      .hero h1 { font-size: clamp(32px, 7vw, 44px); }
    }

    @media (min-width: 1280px) {
      .hero { aspect-ratio: 3.6 / 1; }
    }

    @media (max-width: 380px) {
      .nav-sep, .nav-sub { display: none; }
      .platform-tabs { flex-direction: column; }
      .tab-btn { width: 100%; }
    }

    @media (hover: none) and (pointer: coarse) {
      .step:hover { box-shadow: none; }
    }

    @media (prefers-reduced-motion: reduce) {
      *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
    }

    /* ── MOBILE SIMULATOR ── */
    html.sim-mobile {
      background: #111;
      display: flex;
      justify-content: center;
      padding: 32px 20px;
      min-height: 100vh;
    }
    html.sim-mobile body {
      width: 768px;
      max-width: 768px;
      flex-shrink: 0;
      border-radius: 48px;
      overflow-y: auto;
      overflow-x: hidden;
      box-shadow: 0 0 0 10px #2c2c2c, 0 0 0 12px #1a1a1a, 0 40px 100px rgba(0,0,0,.85);
      position: relative;
      height: fit-content;
    }
    html.sim-mobile body::before {
      content: "";
      position: absolute;
      top: 10px; left: 50%; transform: translateX(-50%);
      width: 90px; height: 26px;
      background: #111;
      border-radius: 16px;
      z-index: 9999;
      pointer-events: none;
    }
    html.sim-mobile .nav { top: 0; position: relative; padding: 0 12px; }
    html.sim-mobile .nav-logo { height: 17px; }
    html.sim-mobile .nav-sep { display: none; }
    /* sim: force mobile hero layout */
    html.sim-mobile .hero {
      background-image: url('../images/hero.webp');
      background-position: center 75%;
      background-size: 100% auto;
      min-height: 0;
      aspect-ratio: 3 / 1;
    }
    html.sim-mobile .hero::before {
      background: linear-gradient(180deg,
        #F7EFE9 0%, #F7EFE9 30%,
        rgba(247,239,233,0) 48%
      );
    }
    html.sim-mobile .hero-inner {
      position: absolute;
      inset: 0 0 auto 0;
      padding: 32px 20px 0;
      pointer-events: auto;
      align-items: flex-start;
    }
    html.sim-mobile .hero-text { width: 100%; max-width: none; }
    html.sim-mobile .hero h1 { font-size: 28px; }
    html.sim-mobile .hero p  { font-size: 14px; }

    /* ── CTA BUTTON (Download Links) ── */
    .cta-btn-primary {
      display: inline-block;
      background: linear-gradient(135deg, #D71920, #A51317);
      color: white;
      padding: 14px 32px;
      border-radius: 8px;
      text-decoration: none;
      font-weight: 600;
      font-size: 15px;
      box-shadow: 0 4px 12px rgba(215, 25, 32, 0.3);
      transition: transform 0.2s, box-shadow 0.2s;
    }
    .cta-btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 6px 16px rgba(215, 25, 32, 0.4);
    }