:root {
    --bg: #f8f8f6;
    --bg-alt: #f0f0ed;
    --surface: #ffffff;
    --border: #e2e2dc;
    --text: #0f0f0e;
    --text-2: #585854;
    --text-3: #909088;
    --accent: #0057ff;
    --accent-hover: #0046d0;
    --accent-glow: rgba(0, 87, 255, 0.16);
    --gold: #d97706;
    --tag-a-bg: #e6edff;
    --tag-a-text: #1a47c8;
    --tag-b-bg: #edfaf2;
    --tag-b-text: #156b38;
    --nav-bg: rgba(248, 248, 246, 0.82);
    --shadow: 0 2px 20px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 12px 56px rgba(0, 0, 0, 0.10);
    --shadow-xl: 0 24px 80px rgba(0, 0, 0, 0.14);
    --radius: 16px;
    --check: #15a349;
    --font-display: 'Google Sans Display', 'Noto Sans Thai', sans-serif;
    --font-body: 'Google Sans', 'Noto Sans Thai', sans-serif;
    --tr: 0.22s cubic-bezier(0.4, 0, 0.2, 1);
    --spring: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
  }

  [data-theme="dark"] {
    --bg: #0c0c0b;
    --bg-alt: #141412;
    --surface: #1a1a18;
    --border: #282824;
    --text: #eeeee8;
    --text-2: #9a9a92;
    --text-3: #606058;
    --nav-bg: rgba(12, 12, 11, 0.86);
    --shadow: 0 2px 20px rgba(0, 0, 0, 0.40);
    --shadow-lg: 0 12px 56px rgba(0, 0, 0, 0.55);
    --shadow-xl: 0 24px 80px rgba(0, 0, 0, 0.65);
    --tag-a-bg: #081530;
    --tag-a-text: #6ea8ff;
    --tag-b-bg: #061510;
    --tag-b-text: #5ec87a;
    --accent-glow: rgba(0, 87, 255, 0.28);
  }

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

  html {
    scroll-behavior: smooth;
    font-size: 16px
  }

  body {
    font-family: var(--font-body);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    transition: background var(--tr), color var(--tr);
  }

  a {
    color: inherit;
    text-decoration: none
  }

  ul {
    list-style: none
  }

  /* CURSOR GLOW */
  .cursor-glow {
    pointer-events: none;
    position: fixed;
    width: 460px;
    height: 460px;
    border-radius: 50%;
    background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
    transform: translate(-50%, -50%);
    z-index: 0;
    transition: opacity 0.4s;
    will-change: left, top;
  }

  /* LANG */
  [data-lang="en"] .th {
    display: none !important
  }

  [data-lang="th"] .en {
    display: none !important
  }

  /* SCROLL REVEAL */
  .reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.65s cubic-bezier(0.4, 0, 0.2, 1), transform 0.65s cubic-bezier(0.4, 0, 0.2, 1);
  }

  .reveal.visible {
    opacity: 1;
    transform: translateY(0)
  }

  .d1 {
    transition-delay: 0.07s
  }

  .d2 {
    transition-delay: 0.14s
  }

  .d3 {
    transition-delay: 0.21s
  }

  .d4 {
    transition-delay: 0.28s
  }

  .d5 {
    transition-delay: 0.35s
  }

  .d6 {
    transition-delay: 0.42s
  }

  /* NAV */
  nav {
    position: sticky;
    top: 0;
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
    height: 62px;
    background: var(--nav-bg);
    backdrop-filter: blur(18px) saturate(1.8);
    border-bottom: 1px solid var(--border);
    gap: 1rem;
    transition: box-shadow var(--tr), background var(--tr);
  }

  nav.scrolled {
    box-shadow: 0 4px 28px rgba(0, 0, 0, 0.08)
  }

  .logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 0.95rem;
    white-space: nowrap;
    transition: transform var(--spring);
  }

  .logo:hover {
    transform: scale(1.04)
  }

  .logo-mark {
    width: 30px;
    height: 30px;
    background: var(--accent);
    border-radius: 8px;
    position: relative;
    flex-shrink: 0;
    transition: box-shadow var(--tr);
  }

  .logo:hover .logo-mark {
    box-shadow: 0 0 0 6px var(--accent-glow)
  }

  .logo-mark::after {
    content: '';
    position: absolute;
    inset: 6px;
    border-radius: 3px;
    background: #fff;
    opacity: 0.45;
  }

  .logo-tld {
    color: var(--text-3);
    font-weight: 400
  }

  .nav-center {
    display: flex;
    gap: 0.2rem
  }

  .nav-center a {
    font-size: 0.84rem;
    color: var(--text-2);
    padding: 6px 13px;
    border-radius: 7px;
    position: relative;
    overflow: hidden;
    transition: color var(--tr);
  }

  .nav-center a::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--bg-alt);
    border-radius: 7px;
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.2s ease;
  }

  .nav-center a:hover::before {
    transform: scaleX(1)
  }

  .nav-center a:hover {
    color: var(--text)
  }

  .nav-center a span {
    position: relative;
    z-index: 1
  }

  .nav-right {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-shrink: 0
  }

  .lang-toggle {
    display: flex;
    align-items: center;
    background: var(--bg-alt);
    border: 1px solid var(--border);
    border-radius: 20px;
    padding: 3px;
    gap: 2px;
    cursor: pointer;
  }

  .lang-btn {
    font-size: 0.74rem;
    font-weight: 600;
    padding: 4px 11px;
    border-radius: 14px;
    color: var(--text-3);
    transition: background var(--tr), color var(--tr), transform var(--spring);
    user-select: none;
  }

  .lang-btn.active {
    background: var(--surface);
    color: var(--text);
    box-shadow: 0 1px 5px rgba(0, 0, 0, 0.12);
    transform: scale(1.05);
  }

  .theme-toggle {
    display: flex;
    align-items: center;
    gap: 7px;
    cursor: pointer;
    user-select: none
  }

  .toggle-track {
    width: 38px;
    height: 21px;
    border-radius: 11px;
    background: var(--border);
    position: relative;
    transition: background 0.3s;
  }

  [data-theme="dark"] .toggle-track {
    background: var(--accent)
  }

  .toggle-knob {
    position: absolute;
    top: 2.5px;
    left: 2.5px;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--surface);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.58rem;
    transition: transform 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.22);
  }

  [data-theme="dark"] .toggle-knob {
    transform: translateX(17px)
  }

  .toggle-label {
    font-size: 0.74rem;
    color: var(--text-3)
  }

  .nav-cta {
    font-size: 0.82rem;
    font-weight: 600;
    background: var(--accent);
    color: #fff;
    padding: 8px 18px;
    border-radius: 8px;
    white-space: nowrap;
    display: inline-block;
    transition: background var(--tr), box-shadow var(--tr), transform var(--tr);
  }

  .nav-cta:hover {
    background: var(--accent-hover);
    box-shadow: 0 6px 24px var(--accent-glow)
  }

  /* HERO */
  .hero-wrap {
    position: relative;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: 5.5rem 2rem 4.5rem;
    overflow: hidden;
  }

  .hero-grid {
    position: absolute;
    inset: 0;
    z-index: 0;
    background-image:
      linear-gradient(var(--border) 1px, transparent 1px),
      linear-gradient(90deg, var(--border) 1px, transparent 1px);
    background-size: 48px 48px;
    mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black 30%, transparent 100%);
    opacity: 0.5;
    animation: gridDrift 20s linear infinite;
  }

  @keyframes gridDrift {
    0% {
      background-position: 0 0
    }

    100% {
      background-position: 48px 48px
    }
  }

  .particles {
    position: absolute;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    overflow: hidden
  }

  .particle {
    position: absolute;
    border-radius: 50%;
    background: var(--accent);
    opacity: 0;
    animation: float var(--dur, 8s) var(--delay, 0s) infinite ease-in-out;
  }

  @keyframes float {
    0% {
      opacity: 0;
      transform: translateY(0) scale(0)
    }

    15% {
      opacity: 0.55
    }

    85% {
      opacity: 0.1
    }

    100% {
      opacity: 0;
      transform: translateY(-300px) scale(0.3)
    }
  }

  .hero {
    position: relative;
    z-index: 1;
    max-width: 1120px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 390px;
    gap: 4rem;
    align-items: center;
  }

  .hero-eyebrow {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 1.5rem
  }

  .live-indicator {
    display: flex;
    align-items: center;
    gap: 9px;
    font-size: 0.76rem;
    font-weight: 600;
    color: var(--text-2);
    letter-spacing: 0.06em;
    text-transform: uppercase;
  }

  .live-dot {
    width: 9px;
    height: 9px;
    border-radius: 50%;
    background: #ef4444;
    flex-shrink: 0;
    animation: livePulse 2s infinite;
  }

  @keyframes livePulse {
    0% {
      box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.5)
    }

    70% {
      box-shadow: 0 0 0 9px rgba(239, 68, 68, 0)
    }

    100% {
      box-shadow: 0 0 0 0 rgba(239, 68, 68, 0)
    }
  }

  .eyebrow-rule {
    flex: 1;
    height: 1px;
    background: var(--border)
  }

  .hero h1 {
    font-family: var(--font-display);
    font-size: clamp(2.6rem, 5.5vw, 3.6rem);
    font-weight: 700;
    line-height: 1.12;
    letter-spacing: -0.025em;
    color: var(--text);
    margin-bottom: 1.35rem;
  }

  .hero h1 em {
    font-style: italic;
    color: var(--accent)
  }

  .underline-word {
    position: relative;
    display: inline-block
  }

  .underline-word::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 0;
    right: 0;
    height: 3px;
    border-radius: 2px;
    background: var(--accent);
    transform: scaleX(0);
    transform-origin: left;
    animation: drawLine 0.8s 1.4s cubic-bezier(0.4, 0, 0.2, 1) forwards;
  }

  @keyframes drawLine {
    to {
      transform: scaleX(1)
    }
  }

  .hero-body {
    font-size: 1.05rem;
    color: var(--text-2);
    max-width: 520px;
    line-height: 1.75;
    margin-bottom: 2.25rem;
  }

  .hero-actions {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    flex-wrap: wrap
  }

  .btn-primary {
    position: relative;
    overflow: hidden;
    font-size: 0.9rem;
    font-weight: 600;
    background: var(--accent);
    color: #fff;
    padding: 13px 26px;
    border-radius: 10px;
    display: inline-flex;
    align-items: center;
    transition: box-shadow var(--tr), transform var(--tr);
  }

  .btn-primary::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at var(--mx, 50%) var(--my, 50%), rgba(255, 255, 255, 0.25), transparent 60%);
    opacity: 0;
    transition: opacity 0.25s;
  }

  .btn-primary:hover::after {
    opacity: 1
  }

  .btn-primary:hover {
    box-shadow: 0 10px 36px var(--accent-glow);
    transform: translateY(-2px)
  }

  .btn-primary:active {
    transform: translateY(0)
  }

  .btn-text {
    font-size: 0.88rem;
    color: var(--text-2);
    position: relative;
    transition: color var(--tr);
  }

  .btn-text::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 100%;
    height: 1px;
    background: var(--accent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.25s ease;
  }

  .btn-text:hover {
    color: var(--text)
  }

  .btn-text:hover::after {
    transform: scaleX(1)
  }

  /* HERO CARD */
  .hero-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.6rem;
    box-shadow: var(--shadow-lg);
    transition: transform 0.12s ease, box-shadow var(--tr);
    will-change: transform;
  }

  .hero-card:hover {
    box-shadow: var(--shadow-xl)
  }

  .hero-card-label {
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-3);
    margin-bottom: 1rem;
    padding-bottom: 0.8rem;
    border-bottom: 1px solid var(--border);
  }

  .stat-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.65rem 6px;
    border-bottom: 1px solid var(--border);
    gap: 1rem;
    border-radius: 6px;
    margin: 0 -6px;
    transition: background var(--tr);
    cursor: default;
  }

  .stat-item:last-child {
    border-bottom: none
  }

  .stat-item:hover {
    background: var(--bg-alt)
  }

  .stat-label {
    font-size: 0.82rem;
    color: var(--text-2)
  }

  .stat-value {
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text);
    text-align: right
  }

  .stat-value.gold {
    color: var(--gold)
  }

  /* SECTIONS */
  .container {
    max-width: 1120px;
    margin: 0 auto;
    padding: 0 2rem
  }

  section {
    padding: 5.5rem 0
  }

  .section-header {
    text-align: center;
    margin-bottom: 3.5rem
  }

  .label {
    display: inline-block;
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--accent);
    background: var(--tag-a-bg);
    padding: 4px 13px;
    border-radius: 20px;
    margin-bottom: 1rem;
  }

  .section-title {
    font-family: var(--font-display);
    font-size: clamp(1.8rem, 3.5vw, 2.5rem);
    font-weight: 700;
    color: var(--text);
    line-height: 1.18;
    margin-bottom: 0.8rem;
    letter-spacing: -0.02em;
  }

  .section-sub {
    font-size: 1rem;
    color: var(--text-2);
    max-width: 510px;
    margin: 0 auto;
    line-height: 1.65
  }

  /* SERVICES */
  .services-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem
  }

  .service-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2.25rem;
    position: relative;
    overflow: hidden;
    transition: box-shadow 0.3s ease;
    will-change: transform;
    transform-style: preserve-3d;
  }

  .service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
  }

  .service-card.s1::before {
    background: var(--accent)
  }

  .service-card.s2::before {
    background: var(--gold)
  }

  .service-card::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at var(--mx, 50%) var(--my, 50%), rgba(0, 87, 255, 0.05) 0%, transparent 60%);
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
  }

  .service-card:hover::after {
    opacity: 1
  }

  .service-card:hover {
    box-shadow: var(--shadow-xl)
  }

  .service-num {
    font-family: var(--font-display);
    font-size: 2.8rem;
    font-weight: 700;
    color: var(--border);
    line-height: 1;
    margin-bottom: 0.4rem;
    transition: color 0.3s, opacity 0.3s;
  }

  .service-card:hover .service-num {
    color: var(--accent);
    opacity: 0.3
  }

  .service-type {
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-3);
    margin-bottom: 0.75rem;
  }

  .service-card h3 {
    font-family: var(--font-display);
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 0.8rem;
  }

  .desc {
    font-size: 0.9rem;
    color: var(--text-2);
    line-height: 1.7;
    margin-bottom: 1.3rem
  }

  .feature-list {
    margin-bottom: 1.75rem;
    display: grid;
    gap: 0.5rem
  }

  .feature-list li {
    font-size: 0.85rem;
    color: var(--text-2);
    padding-left: 1.2rem;
    position: relative;
    line-height: 1.5;
    transition: color var(--tr), transform var(--tr);
  }

  .feature-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--accent);
    font-size: 0.78rem;
    transition: transform var(--tr);
  }

  .feature-list li:hover {
    color: var(--text);
    transform: translateX(3px)
  }

  .feature-list li:hover::before {
    transform: translateX(2px)
  }

  .service-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent);
    transition: gap var(--spring), color var(--tr);
  }

  .service-link:hover {
    gap: 10px;
    color: var(--accent-hover)
  }

  .divider {
    height: 1px;
    background: var(--border);
    max-width: 1120px;
    margin: 0 auto
  }

  /* PROTOCOLS */
  .protocols {
    background: var(--bg-alt)
  }

  .proto-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem
  }

  .proto-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.75rem;
    transition: transform var(--tr), box-shadow var(--tr), border-color var(--tr);
    cursor: default;
  }

  .proto-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent)
  }

  .proto-badge {
    display: inline-block;
    font-size: 0.68rem;
    font-weight: 700;
    letter-spacing: 0.06em;
    background: var(--accent);
    color: #fff;
    padding: 3px 10px;
    border-radius: 5px;
    margin-bottom: 0.9rem;
    transition: transform var(--spring), box-shadow var(--tr);
  }

  .proto-card:hover .proto-badge {
    transform: scale(1.08);
    box-shadow: 0 4px 14px var(--accent-glow)
  }

  .proto-card h4 {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 0.6rem
  }

  .proto-card p {
    font-size: 0.86rem;
    color: var(--text-2);
    line-height: 1.65;
    margin-bottom: 0.9rem
  }

  .proto-meta {
    font-size: 0.78rem;
    color: var(--text-3)
  }

  .proto-meta strong {
    color: var(--text-2)
  }

  .latency-bar {
    height: 4px;
    background: var(--border);
    border-radius: 4px;
    margin-top: 0.6rem;
    overflow: hidden
  }

  .latency-fill {
    height: 100%;
    border-radius: 4px;
    background: var(--accent);
    width: 0;
    transition: width 1.1s cubic-bezier(0.4, 0, 0.2, 1);
  }

  /* USE CASES */
  .uc-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem
  }

  .uc-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.75rem;
    transition: transform var(--tr), box-shadow var(--tr);
    position: relative;
    overflow: hidden;
  }

  .uc-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent), transparent);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.35s ease;
  }

  .uc-card:hover::after {
    transform: scaleX(1)
  }

  .uc-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg)
  }

  .uc-num {
    font-family: var(--font-display);
    font-size: 1.9rem;
    font-weight: 700;
    color: var(--border);
    margin-bottom: 0.5rem;
    transition: color 0.3s, transform 0.3s;
  }

  .uc-card:hover .uc-num {
    color: var(--accent);
    opacity: 0.3;
    transform: scale(1.1) translateX(2px)
  }

  .uc-card h4 {
    font-family: var(--font-display);
    font-size: 0.97rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 0.5rem
  }

  .uc-card p {
    font-size: 0.85rem;
    color: var(--text-2);
    line-height: 1.6
  }

  /* TABLE */
  .compare-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    font-size: 0.88rem;
    box-shadow: var(--shadow);
  }

  .compare-table thead {
    background: var(--bg-alt);
    border-bottom: 2px solid var(--border)
  }

  .compare-table th {
    font-weight: 600;
    font-size: 0.82rem;
    padding: 1rem 1.3rem;
    text-align: left;
    color: var(--text-2);
    letter-spacing: 0.02em;
  }

  .compare-table th.col-a {
    color: var(--accent)
  }

  .compare-table th.col-b {
    color: var(--gold)
  }

  .compare-table td {
    padding: 0.9rem 1.3rem;
    border-top: 1px solid var(--border);
    color: var(--text-2);
    vertical-align: middle;
    transition: background var(--tr);
  }

  .compare-table tbody tr:hover td {
    background: var(--bg-alt)
  }

  .compare-table td:first-child {
    font-weight: 500;
    color: var(--text)
  }

  .tag {
    display: inline-block;
    font-size: 0.76rem;
    font-weight: 600;
    padding: 3px 10px;
    border-radius: 6px
  }

  .tag-a {
    background: var(--tag-a-bg);
    color: var(--tag-a-text)
  }

  .tag-b {
    background: var(--tag-b-bg);
    color: var(--tag-b-text)
  }

  .check {
    color: var(--check)
  }

  .dash {
    color: var(--text-3)
  }

  /* CTA */
  .cta {
    background: var(--bg-alt);
    border-top: 1px solid var(--border)
  }

  .cta-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
    flex-wrap: wrap
  }

  .cta-inner h2 {
    font-family: var(--font-display);
    font-size: clamp(1.5rem, 3vw, 2.1rem);
    font-weight: 700;
    margin: 0.35rem 0 0.5rem;
  }

  .cta-inner h2 em {
    font-style: italic;
    color: var(--accent)
  }

  .cta-inner p {
    font-size: 0.92rem;
    color: var(--text-2)
  }

  .cta-btns {
    display: flex;
    gap: 1rem;
    align-items: center;
    flex-wrap: wrap
  }

  /* FOOTER */
  footer {
    background: var(--bg);
    border-top: 1px solid var(--border);
    text-align: center;
    padding: 2.5rem 2rem;
  }

  .f-logo {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: 0.5rem
  }

  .f-logo .tld {
    color: var(--text-3);
    font-weight: 400
  }

  .f-copy {
    font-size: 0.8rem;
    color: var(--text-3);
    margin-bottom: 1rem
  }

  .f-links {
    display: flex;
    gap: 1.5rem;
    justify-content: center;
    flex-wrap: wrap
  }

  .f-links a {
    font-size: 0.8rem;
    color: var(--text-3);
    transition: color var(--tr), transform var(--spring);
    display: inline-block;
  }

  .f-links a:hover {
    color: var(--accent);
    transform: translateY(-2px)
  }

  /* ═══════════════════════════════════════════════════════════
  MOBILE MENU — DROPDOWN
═══════════════════════════════════════════════════════════ */
  .hamburger {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: flex-end;
    gap: 5px;
    width: 40px;
    height: 40px;
    cursor: pointer;
    border-radius: 8px;
    padding: 8px;
    flex-shrink: 0;
    background: none;
    border: none;
    transition: background var(--tr);
  }

  .hamburger:hover {
    background: var(--bg-alt)
  }

  .hamburger span {
    display: block;
    height: 2px;
    border-radius: 2px;
    background: var(--text);
    transition: transform 0.3s ease, opacity 0.3s ease, width 0.3s ease;
  }

  .hamburger span:nth-child(1) {
    width: 18px
  }

  .hamburger span:nth-child(2) {
    width: 22px
  }

  .hamburger span:nth-child(3) {
    width: 14px
  }

  .hamburger.open span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
    width: 20px
  }

  .hamburger.open span:nth-child(2) {
    opacity: 0;
    transform: scaleX(0)
  }

  .hamburger.open span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
    width: 20px
  }

  /* Dropdown panel — sits just below the nav */
  .mobile-dropdown {
    display: none;
    position: fixed;
    top: 56px;
    left: 0;
    right: 0;
    z-index: 195;
    pointer-events: none;
  }

  .mobile-dropdown.open {
    pointer-events: all
  }

  .dropdown-panel {
    margin: 0 0.75rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    box-shadow: 0 16px 48px rgba(0, 0, 0, 0.12), 0 4px 16px rgba(0, 0, 0, 0.06);
    overflow: hidden;
    transform: translateY(-8px) scale(0.97);
    opacity: 0;
    transform-origin: top center;
    transition: transform 0.28s cubic-bezier(0.34, 1.56, 0.64, 1),
      opacity 0.22s ease;
  }

  .mobile-dropdown.open .dropdown-panel {
    transform: translateY(0) scale(1);
    opacity: 1;
  }

  /* Nav links */
  .dropdown-links {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2px;
    padding: 8px;
  }

  .dropdown-link {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 14px;
    border-radius: 10px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-2);
    transition: background var(--tr), color var(--tr), transform var(--tr);
  }

  .dropdown-link:hover {
    background: var(--bg-alt);
    color: var(--text);
    transform: scale(1.01)
  }

  .dropdown-link-icon {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    background: var(--tag-a-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    flex-shrink: 0;
    transition: transform var(--spring);
  }

  .dropdown-link:hover .dropdown-link-icon {
    transform: scale(1.12)
  }

  .dropdown-link-text {
    display: flex;
    flex-direction: column;
    gap: 1px
  }

  .dropdown-link-label {
    font-weight: 600;
    color: var(--text);
    font-size: 0.84rem
  }

  .dropdown-link-desc {
    font-size: 0.72rem;
    color: var(--text-3);
    font-weight: 400
  }

  /* Bottom bar — lang + CTA */
  .dropdown-bar {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-top: 1px solid var(--border);
    background: var(--bg-alt);
  }

  .dropdown-bar .lang-toggle {
    margin-right: auto
  }

  .dropdown-bar .btn-primary {
    font-size: 0.8rem;
    padding: 8px 16px;
    border-radius: 8px;
    white-space: nowrap;
  }

  /* Dim backdrop */
  .dropdown-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 194;
    background: rgba(0, 0, 0, 0.08);
    opacity: 0;
    transition: opacity 0.22s ease;
  }

  .dropdown-backdrop.open {
    display: block;
    opacity: 1
  }

  /* ═══════════════════════════════════════════════════════════
  RESPONSIVE — TABLET 900px
═══════════════════════════════════════════════════════════ */
  @media(max-width:900px) {
    .hero {
      grid-template-columns: 1fr;
      gap: 2.5rem
    }

    .hero-card {
      max-width: 100%
    }

    .services-grid {
      grid-template-columns: 1fr
    }

    .proto-grid {
      grid-template-columns: repeat(2, 1fr)
    }

    .uc-grid {
      grid-template-columns: repeat(2, 1fr)
    }
  }

  /* ═══════════════════════════════════════════════════════════
  RESPONSIVE — MOBILE 640px
═══════════════════════════════════════════════════════════ */
  @media(max-width:640px) {

    /* Nav */
    nav {
      padding: 0 1rem;
      height: 56px;
      gap: 0.5rem
    }

    .nav-center {
      display: none
    }

    .toggle-label {
      display: none
    }

    .hamburger {
      display: flex
    }

    .mobile-dropdown {
      display: block
    }

    /* Hide desktop lang toggle, it lives in dropdown bar on mobile */
    nav .lang-toggle {
      display: none
    }

    /* Hero */
    .hero-wrap {
      padding: 2.5rem 1rem 2rem
    }

    .hero {
      gap: 2rem
    }

    .hero h1 {
      font-size: clamp(2rem, 8vw, 2.8rem);
      letter-spacing: -0.02em
    }

    .hero-body {
      font-size: 0.95rem;
      margin-bottom: 1.75rem
    }

    .hero-actions {
      gap: 0.875rem
    }

    .btn-primary {
      padding: 11px 20px;
      font-size: 0.88rem;
      width: 100%;
      justify-content: center
    }

    .btn-text {
      width: 100%;
      text-align: center
    }

    .hero-actions {
      flex-direction: column;
      align-items: stretch
    }

    .hero-card {
      padding: 1.25rem
    }

    .stat-label {
      font-size: 0.78rem
    }

    .stat-value {
      font-size: 0.78rem
    }

    /* Sections */
    section {
      padding: 2.75rem 0
    }

    .container {
      padding: 0 1rem
    }

    .section-header {
      margin-bottom: 2rem
    }

    .section-title {
      font-size: clamp(1.5rem, 6vw, 2rem)
    }

    .section-sub {
      font-size: 0.92rem
    }

    /* Services */
    .services-grid {
      grid-template-columns: 1fr;
      gap: 1rem
    }

    .service-card {
      padding: 1.5rem
    }

    .service-num {
      font-size: 2rem
    }

    .service-card h3 {
      font-size: 1.15rem
    }

    .feature-list li {
      font-size: 0.82rem
    }

    /* Protocols */
    .proto-grid {
      grid-template-columns: 1fr;
      gap: 1rem
    }

    .proto-card {
      padding: 1.25rem
    }

    /* Use cases */
    .uc-grid {
      grid-template-columns: 1fr;
      gap: 0.875rem
    }

    .uc-card {
      padding: 1.25rem
    }

    /* Table — horizontal scroll */
    .table-wrap {
      overflow-x: auto;
      -webkit-overflow-scrolling: touch;
      border-radius: var(--radius);
      border: 1px solid var(--border);
      box-shadow: var(--shadow);
    }

    .compare-table {
      min-width: 560px;
      border: none;
      border-radius: 0;
      box-shadow: none;
      font-size: 0.82rem;
    }

    .compare-table th,
    .compare-table td {
      padding: 0.75rem 0.9rem
    }

    /* Table scroll hint */
    .table-scroll-hint {
      display: flex;
      align-items: center;
      gap: 6px;
      font-size: 0.74rem;
      color: var(--text-3);
      margin-bottom: 0.6rem;
      animation: hintFade 3s 1s ease forwards;
    }

    @keyframes hintFade {
      0% {
        opacity: 1
      }

      80% {
        opacity: 1
      }

      100% {
        opacity: 0
      }
    }

    .hint-icon {
      font-size: 0.9rem;
      animation: hintSlide 1.5s 1s ease-in-out infinite alternate
    }

    @keyframes hintSlide {
      from {
        transform: translateX(0)
      }

      to {
        transform: translateX(6px)
      }
    }

    /* CTA */
    .cta-inner {
      flex-direction: column;
      text-align: center
    }

    .cta-btns {
      flex-direction: column;
      align-items: stretch;
      width: 100%
    }

    .cta-btns .btn-primary {
      justify-content: center
    }

    .cta-btns .btn-text {
      text-align: center
    }

    /* Footer */
    footer {
      padding: 2rem 1rem
    }

    .f-links {
      gap: 1rem
    }

    /* Reduce animation on mobile */
    .cursor-glow {
      display: none
    }

    .hero-grid {
      display: none
    }
  }

  /* ═══════════════════════════════════════════════════════════
  CONTACT SECTION
═══════════════════════════════════════════════════════════ */
  #contact {
    padding: 5rem 2rem;
    background: var(--bg);
    border-top: 1px solid var(--border);
  }

  .contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: start;
    max-width: 900px;
    margin: 0 auto;
  }

  .contact-intro h2 {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    line-height: 1.25;
    margin-bottom: 1rem;
  }

  .contact-intro h2 em {
    font-style: normal;
    color: var(--accent);
  }

  .contact-intro p {
    color: var(--text-2);
    font-size: 0.95rem;
    line-height: 1.7;
  }

  .contact-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2rem;
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    gap: 1.4rem;
  }

  .contact-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
  }

  .contact-item-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    background: var(--accent-glow);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    flex-shrink: 0;
    border: 1px solid var(--border);
  }

  .contact-item-body {
    flex: 1;
  }

  .contact-item-label {
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    color: var(--text-3);
    margin-bottom: 0.25rem;
  }

  .contact-item-value {
    font-size: 0.92rem;
    color: var(--text);
    line-height: 1.5;
  }

  .contact-item-value a {
    color: var(--accent);
    transition: opacity var(--tr);
  }

  .contact-item-value a:hover {
    opacity: 0.75;
  }

  .contact-divider {
    height: 1px;
    background: var(--border);
  }

  @media(max-width:768px) {
    .contact-grid {
      grid-template-columns: 1fr;
      gap: 2rem;
    }

    .contact-intro h2 {
      font-size: 1.6rem;
    }
  }

  /* ═══════════════════════════════════════════════════════════
  RESPONSIVE — SMALL 400px
═══════════════════════════════════════════════════════════ */
  @media(max-width:400px) {
    nav {
      padding: 0 0.75rem
    }

    .logo-name {
      display: none
    }

    .logo span:last-child::before {
      content: ' '
    }

    .container {
      padding: 0 0.875rem
    }

    .hero-wrap {
      padding: 2rem 0.875rem 1.75rem
    }

    .service-card,
    .proto-card,
    .uc-card {
      padding: 1.1rem
    }

    .hero h1 {
      font-size: 1.9rem
    }
  }

  /* ═══════════════════════════════════════════════════════════
  TOUCH — disable hover-heavy effects on touch devices
═══════════════════════════════════════════════════════════ */
  @media(hover:none) {

    .service-card:hover,
    .proto-card:hover,
    .uc-card:hover {
      transform: none;
      box-shadow: var(--shadow);
    }

    .feature-list li:hover {
      transform: none
    }

    .btn-primary:hover {
      transform: none
    }

    .nav-cta:hover {
      transform: none
    }

    /* Keep visible bottom bar on touch for uc-cards */
    .uc-card::after {
      transform: scaleX(1);
      opacity: 0.4
    }
  }