:root {
      --bg: #06080f;
      --bg-elevated: #0c111c;
      --bg-card: #101722;
      --bg-card-hover: #151d2b;
      --border: rgba(255,255,255,0.07);
      --border-light: rgba(255,255,255,0.12);
      --text: #eef1f6;
      --text-muted: #8b95a8;
      --text-dim: #5c6578;
      --violet: #7c8cff;
      --violet-glow: rgba(124,140,255,0.32);
      --cyan: #2fd4c8;
      --cyan-glow: rgba(47,212,200,0.22);
      --green: #34d399;
      --amber: #fbbf24;
      --gradient: linear-gradient(135deg, #7c8cff 0%, #5b8def 48%, #2fd4c8 100%);
      --radius: 20px;
      --radius-sm: 12px;
      --font-mono: 'JetBrains Mono', monospace;
    }

    *, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
    html { scroll-behavior: smooth; }

    body {
      font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, sans-serif;
      background: var(--bg);
      color: var(--text);
      line-height: 1.65;
      -webkit-font-smoothing: antialiased;
      overflow-x: hidden;
    }

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

    .container { max-width: 1140px; margin: 0 auto; padding: 0 28px; }

    /* Ambient background — AI technical photo layers */
    .ambient {
      position: fixed;
      inset: 0;
      pointer-events: none;
      z-index: 0;
      overflow: hidden;
      background: #05070c;
    }
    .ambient-photo {
      position: absolute;
      inset: -5%;
      background-size: cover;
      background-position: center;
      background-repeat: no-repeat;
      will-change: transform;
    }
    .ambient-photo.ai-main {
      background-image: url('../images/bg/ai-tech-1.jpg');
      opacity: 0.48;
      filter: saturate(1.25) contrast(1.08) brightness(0.78) hue-rotate(-8deg);
      animation: ambientKenA 34s ease-in-out infinite alternate;
    }
    .ambient-photo.ai-glow {
      background-image: url('../images/bg/ai-tech-5.jpg');
      opacity: 0.32;
      mix-blend-mode: screen;
      filter: saturate(1.35) brightness(0.85) contrast(1.05);
      background-position: 55% 40%;
      animation: ambientKenB 40s ease-in-out infinite alternate;
    }
    .ambient-photo.ai-mesh {
      background-image: url('../images/bg/ai-tech-6.jpg');
      opacity: 0.22;
      mix-blend-mode: soft-light;
      filter: saturate(1.15) brightness(0.9);
      background-position: 40% 50%;
      animation: ambientKenC 46s ease-in-out infinite alternate;
    }
    .ambient-scrim {
      position: absolute;
      inset: 0;
      background:
        radial-gradient(110% 70% at 50% -8%, rgba(124,140,255,0.26) 0%, transparent 52%),
        radial-gradient(65% 48% at 100% 20%, rgba(47,212,200,0.12) 0%, transparent 48%),
        radial-gradient(55% 40% at 0% 80%, rgba(91,141,239,0.12) 0%, transparent 50%),
        linear-gradient(180deg, rgba(5,7,12,0.45) 0%, rgba(6,8,15,0.68) 36%, rgba(5,7,12,0.9) 70%, rgba(5,7,12,0.97) 100%);
    }
    @keyframes ambientKenA {
      0% { transform: scale(1) translate3d(0, 0, 0); }
      100% { transform: scale(1.08) translate3d(-1.5%, 1%, 0); }
    }
    @keyframes ambientKenB {
      0% { transform: scale(1.06) translate3d(1%, 0, 0); }
      100% { transform: scale(1.12) translate3d(-1%, -1.5%, 0); }
    }
    @keyframes ambientKenC {
      0% { transform: scale(1.04) translate3d(0, 1%, 0); }
      100% { transform: scale(1.1) translate3d(1.5%, -1%, 0); }
    }
    .ambient-orb {
      position: absolute;
      border-radius: 50%;
      filter: blur(90px);
      opacity: 0.4;
      mix-blend-mode: screen;
    }
    .ambient-orb.a {
      width: 520px; height: 520px;
      background: radial-gradient(circle, rgba(124,140,255,0.5) 0%, rgba(124,140,255,0) 70%);
      top: -180px; left: 15%;
    }
    .ambient-orb.b {
      width: 480px; height: 480px;
      background: radial-gradient(circle, rgba(47,212,200,0.35) 0%, rgba(47,212,200,0) 70%);
      top: 35%; right: -120px;
      opacity: 0.32;
    }
    .ambient-orb.c {
      width: 420px; height: 420px;
      background: radial-gradient(circle, rgba(91,141,239,0.3) 0%, rgba(91,141,239,0) 70%);
      bottom: -80px; left: 35%;
      opacity: 0.28;
    }
    .ambient-beam {
      position: absolute;
      width: 42%;
      height: 120%;
      top: -20%;
      left: 50%;
      transform: translateX(-50%) rotate(18deg);
      background: linear-gradient(180deg, rgba(255,255,255,0.04) 0%, rgba(255,255,255,0.01) 40%, transparent 75%);
      filter: blur(28px);
      opacity: 0.55;
    }
    .ambient-beam.alt {
      width: 28%;
      transform: translateX(-20%) rotate(-12deg);
      opacity: 0.28;
      filter: blur(40px);
    }
    .grid-overlay {
      position: fixed;
      inset: 0;
      background-image: radial-gradient(rgba(255,255,255,0.07) 0.7px, transparent 0.7px);
      background-size: 28px 28px;
      mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, black 10%, transparent 72%);
      opacity: 0.35;
      pointer-events: none;
      z-index: 0;
    }
    @media (prefers-reduced-motion: reduce) {
      .ambient-photo.ai-main,
      .ambient-photo.ai-glow,
      .ambient-photo.ai-mesh { animation: none !important; }
    }
    .noise-overlay {
      position: fixed;
      inset: 0;
      pointer-events: none;
      z-index: 0;
      opacity: 0.035;
      mix-blend-mode: overlay;
      background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
      background-size: 180px 180px;
    }
    /* Header */
    .header {
      position: fixed;
      top: 0; left: 0; right: 0;
      z-index: 200;
      padding: 16px 0;
      transition: background 0.3s, border-color 0.3s;
    }
    .header.scrolled {
      background: rgba(6,8,15,0.78);
      backdrop-filter: blur(18px) saturate(1.2);
      border-bottom: 1px solid var(--border);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
    }
    .logo {
      display: flex;
      align-items: center;
      gap: 12px;
      font-weight: 700;
      font-size: 1.05rem;
      letter-spacing: -0.02em;
    }
    .logo img {
      height: 22px;
      width: auto;
      display: block;
    }
    .logo-mark {
      width: 34px; height: 34px;
      border-radius: 10px;
      background: var(--gradient);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.75rem;
      font-weight: 800;
      color: white;
    }
    .nav { display: flex; align-items: center; gap: 36px; }
    .nav-links { display: flex; gap: 32px; list-style: none; }
    .nav-links a {
      font-size: 0.875rem;
      color: var(--text-muted);
      transition: color 0.2s;
      font-weight: 500;
    }
    .nav-links a:hover { color: var(--text); }
    .nav-actions { display: flex; gap: 10px; }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 10px 20px;
      border-radius: 10px;
      font-size: 0.875rem;
      font-weight: 600;
      border: none;
      cursor: pointer;
      transition: all 0.25s;
      font-family: inherit;
      white-space: nowrap;
    }
    .btn-ghost { background: transparent; color: var(--text-muted); }
    .btn-ghost:hover { color: var(--text); }
    .btn-primary {
      background: var(--gradient);
      color: white;
      box-shadow: 0 0 24px var(--violet-glow);
    }
    .btn-primary:hover { transform: translateY(-1px); box-shadow: 0 0 32px var(--violet-glow); }
    .btn-outline {
      background: transparent;
      color: var(--text);
      border: 1px solid var(--border-light);
    }
    .btn-outline:hover { background: rgba(255,255,255,0.04); border-color: rgba(255,255,255,0.2); }
    .btn-lg { padding: 14px 28px; font-size: 0.9375rem; border-radius: 12px; }
    .mobile-toggle { display: none; background: none; border: none; color: var(--text); font-size: 1.4rem; cursor: pointer; padding: 4px; line-height: 1; }
    .mobile-nav {
      display: none;
      position: absolute;
      left: 0; right: 0; top: 100%;
      background: rgba(8,12,20,0.96);
      backdrop-filter: blur(16px);
      border-bottom: 1px solid var(--border);
      padding: 12px 28px 20px;
      z-index: 60;
    }
    .mobile-nav.is-open { display: block; }
    @media (min-width: 769px) {
      .mobile-nav, .mobile-nav.is-open { display: none !important; }
    }
    .mobile-nav a {
      display: block;
      padding: 12px 0;
      font-size: 0.9375rem;
      color: var(--text-muted);
      border-bottom: 1px solid var(--border);
      font-weight: 500;
    }
    .mobile-nav a:last-child { border-bottom: none; }
    .mobile-nav a:hover { color: var(--text); }
    .mobile-nav .btn-primary {
      margin-top: 14px;
      width: 100%;
      text-align: center;
      border: none;
      border-bottom: none;
      padding: 12px 20px;
      color: #fff;
      font-weight: 600;
      border-radius: 10px;
    }
    .mobile-nav .btn-primary:hover {
      color: #fff;
    }

    /* Hero */
    .hero {
      position: relative;
      z-index: 1;
      padding: 160px 0 100px;
      text-align: center;
    }
    .hero-eyebrow {
      display: inline-flex;
      align-items: center;
      gap: 10px;
      padding: 6px 16px 6px 8px;
      background: rgba(139,92,246,0.12);
      border: 1px solid rgba(139,92,246,0.25);
      border-radius: 100px;
      font-size: 0.8125rem;
      color: #c4b5fd;
      margin-bottom: 32px;
    }
    .hero-eyebrow .dot {
      width: 8px; height: 8px;
      background: var(--green);
      border-radius: 50%;
      animation: pulse 2s infinite;
    }
    @keyframes pulse { 0%,100% { opacity:1; } 50% { opacity:0.4; } }

    .hero h1 {
      font-size: clamp(2.4rem, 5.5vw, 3.75rem);
      font-weight: 800;
      line-height: 1.15;
      letter-spacing: -0.035em;
      margin-bottom: 24px;
      max-width: 820px;
      margin-left: auto;
      margin-right: auto;
    }
    .hero h1 .gradient-text {
      background: var(--gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .hero-desc {
      font-size: 1.125rem;
      color: var(--text-muted);
      max-width: 580px;
      margin: 0 auto 40px;
      line-height: 1.75;
    }
    .hero-actions {
      display: flex;
      justify-content: center;
      gap: 14px;
      flex-wrap: wrap;
      margin-bottom: 72px;
    }
    .hero-visual {
      position: relative;
      max-width: 960px;
      margin: 0 auto;
    }
    .hero-glow {
      position: absolute;
      inset: -40px;
      background: radial-gradient(ellipse at center, var(--violet-glow) 0%, transparent 65%);
      pointer-events: none;
    }
    .platform-preview {
      position: relative;
      background: var(--bg-elevated);
      border: 1px solid var(--border-light);
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: 0 40px 80px rgba(0,0,0,0.5);
    }
    .preview-bar {
      display: flex;
      align-items: center;
      gap: 8px;
      padding: 14px 18px;
      background: rgba(0,0,0,0.3);
      border-bottom: 1px solid var(--border);
    }
    .preview-dot { width: 10px; height: 10px; border-radius: 50%; }
    .preview-dot.r { background: #ff5f57; }
    .preview-dot.y { background: #febc2e; }
    .preview-dot.g { background: #28c840; }
    .preview-url {
      flex: 1;
      text-align: center;
      font-size: 0.75rem;
      color: var(--text-dim);
      font-family: var(--font-mono);
    }
    .preview-body { display: flex; min-height: 360px; }
    .preview-nav {
      width: 200px;
      padding: 16px 0;
      border-right: 1px solid var(--border);
      background: rgba(0,0,0,0.2);
      flex-shrink: 0;
    }
    .preview-nav-item {
      padding: 9px 18px;
      font-size: 0.75rem;
      color: var(--text-dim);
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .preview-nav-item.on { color: var(--text); background: rgba(139,92,246,0.1); border-left: 2px solid var(--violet); }
    .preview-nav-item .ic { width: 14px; height: 14px; border-radius: 4px; background: rgba(255,255,255,0.08); }
    .preview-main { flex: 1; padding: 20px; }
    .preview-stats { display: flex; gap: 10px; margin-bottom: 16px; flex-wrap: wrap; }
    .preview-stat {
      padding: 8px 14px;
      background: rgba(255,255,255,0.03);
      border: 1px solid var(--border);
      border-radius: 8px;
      font-size: 0.6875rem;
      color: var(--text-muted);
    }
    .preview-stat b { color: var(--cyan); font-weight: 600; }
    .preview-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 10px; margin-bottom: 14px; }
    .preview-card {
      background: rgba(255,255,255,0.03);
      border: 1px solid var(--border);
      border-radius: 10px;
      padding: 14px;
    }
    .preview-card .lbl { font-size: 0.625rem; color: var(--text-dim); margin-bottom: 4px; }
    .preview-card .val { font-size: 1.125rem; font-weight: 700; }
    .preview-table { border: 1px solid var(--border); border-radius: 10px; overflow: hidden; }
    .preview-row {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr;
      padding: 8px 12px;
      font-size: 0.625rem;
      border-bottom: 1px solid var(--border);
      color: var(--text-muted);
    }
    .preview-row.head { background: rgba(255,255,255,0.02); color: var(--text-dim); font-weight: 600; }
    .preview-row:last-child { border-bottom: none; }
    .preview-charts {
      display: grid;
      grid-template-columns: 1.4fr 1fr;
      gap: 10px;
      margin-bottom: 14px;
    }
    .preview-chart {
      background: rgba(255,255,255,0.03);
      border: 1px solid var(--border);
      border-radius: 10px;
      padding: 12px;
    }
    .preview-chart .lbl {
      font-size: 0.625rem;
      color: var(--text-dim);
      margin-bottom: 8px;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .preview-chart .lbl b { color: var(--cyan); font-weight: 600; }
    .preview-chart svg { display: block; width: 100%; height: auto; }
    .chart-bars {
      display: flex;
      align-items: flex-end;
      gap: 6px;
      height: 72px;
      padding-top: 4px;
    }
    .chart-bar {
      flex: 1;
      border-radius: 4px 4px 2px 2px;
      background: linear-gradient(180deg, var(--violet) 0%, rgba(34,211,238,0.55) 100%);
      opacity: 0.85;
      min-height: 8px;
      position: relative;
    }
    .chart-bar::after {
      content: attr(data-label);
      position: absolute;
      bottom: -14px;
      left: 50%;
      transform: translateX(-50%);
      font-size: 0.5rem;
      color: var(--text-dim);
      white-space: nowrap;
    }
    .chart-bars { margin-bottom: 14px; }
    .tag { display: inline-block; padding: 2px 7px; border-radius: 4px; font-size: 0.5625rem; font-weight: 600; }
    .tag-violet { background: rgba(139,92,246,0.15); color: #c4b5fd; }
    .tag-cyan { background: rgba(34,211,238,0.12); color: #67e8f9; }
    .tag-green { background: rgba(52,211,153,0.12); color: #6ee7b7; }
    .tag-api { background: rgba(251,191,36,0.12); color: #fcd34d; }

    /* Insight / graphs section */
    .insight-section {
      background: linear-gradient(180deg, transparent 0%, rgba(99,102,241,0.05) 40%, transparent 100%);
    }
    .insight-grid {
      display: grid;
      grid-template-columns: 1.3fr 1fr 1fr;
      gap: 16px;
    }
    .insight-card {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 28px 24px;
      transition: border-color 0.3s, transform 0.3s;
      overflow: hidden;
    }
    .insight-card:hover {
      border-color: var(--border-light);
      transform: translateY(-2px);
    }
    .insight-card .ic-label {
      font-size: 0.6875rem;
      font-weight: 700;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      color: var(--violet);
      margin-bottom: 10px;
    }
    .insight-card h3 {
      font-size: 1.0625rem;
      font-weight: 700;
      margin-bottom: 6px;
      letter-spacing: -0.02em;
    }
    .insight-card .ic-desc {
      font-size: 0.8125rem;
      color: var(--text-muted);
      margin-bottom: 20px;
      line-height: 1.65;
    }
    .insight-card .ic-foot {
      margin-top: 16px;
      font-size: 0.75rem;
      color: var(--text-dim);
      display: flex;
      justify-content: space-between;
      gap: 12px;
    }
    .insight-card .ic-foot strong { color: var(--cyan); font-weight: 600; }
    .insight-card svg { display: block; width: 100%; height: auto; }
    .donut-wrap {
      display: flex;
      align-items: center;
      gap: 20px;
    }
    .donut-wrap svg { width: 120px; height: 120px; flex-shrink: 0; }
    .donut-legend { display: flex; flex-direction: column; gap: 10px; flex: 1; }
    .donut-item {
      display: flex;
      align-items: center;
      gap: 8px;
      font-size: 0.75rem;
      color: var(--text-muted);
    }
    .donut-item .swatch {
      width: 8px; height: 8px;
      border-radius: 2px;
      flex-shrink: 0;
    }
    .donut-item b { margin-left: auto; color: var(--text); font-weight: 700; }
    .hbar-list { display: flex; flex-direction: column; gap: 14px; }
    .hbar-row .hbar-meta {
      display: flex;
      justify-content: space-between;
      font-size: 0.75rem;
      color: var(--text-muted);
      margin-bottom: 6px;
    }
    .hbar-row .hbar-meta b { color: var(--text); font-weight: 700; }
    .hbar-track {
      height: 8px;
      background: rgba(255,255,255,0.06);
      border-radius: 100px;
      overflow: hidden;
    }
    .hbar-fill {
      height: 100%;
      border-radius: 100px;
      width: var(--w, 0%);
      transition: width 1.2s cubic-bezier(0.22, 1, 0.36, 1);
    }
    .insight-card.reveal .hbar-fill { width: 0; }
    .insight-card.reveal.is-in .hbar-fill { width: var(--w); }
    .hbar-fill.old { background: rgba(248,113,113,0.55); }
    .hbar-fill.new { background: linear-gradient(90deg, var(--violet), var(--cyan)); }

    /* Mini visuals in bento */
    .bento-visual {
      margin-top: 18px;
      border-radius: 10px;
      border: 1px solid var(--border);
      background: rgba(0,0,0,0.2);
      padding: 12px;
      overflow: hidden;
    }
    .bento-visual svg { display: block; width: 100%; height: auto; }

    /* Architecture diagram */
    .arch-diagram {
      margin-top: 48px;
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 32px 28px;
      overflow: hidden;
    }
    .arch-diagram svg { display: block; width: 100%; max-width: 900px; margin: 0 auto; height: auto; }
    .arch-caption {
      text-align: center;
      font-size: 0.8125rem;
      color: var(--text-dim);
      margin-top: 16px;
    }

    /* Section */
    section { position: relative; z-index: 1; padding: 100px 0; }
    .section-head { margin-bottom: 56px; }
    .section-head.center { text-align: center; }
    .section-label {
      display: inline-block;
      font-size: 0.75rem;
      font-weight: 700;
      letter-spacing: 0.12em;
      text-transform: uppercase;
      color: var(--violet);
      margin-bottom: 14px;
    }
    .section-title {
      font-size: clamp(1.75rem, 3vw, 2.5rem);
      font-weight: 800;
      letter-spacing: -0.03em;
      line-height: 1.25;
      margin-bottom: 14px;
    }
    .section-desc {
      font-size: 1.0625rem;
      color: var(--text-muted);
      max-width: 560px;
      line-height: 1.75;
    }
    .section-head.center .section-desc { margin: 0 auto; }

    /* Channel / API feature sections */
    .channel-section.excel {
      background: linear-gradient(180deg, transparent 0%, rgba(34,211,238,0.04) 50%, transparent 100%);
    }
    .channel-section.mobile {
      background: linear-gradient(180deg, transparent 0%, rgba(52,211,153,0.04) 50%, transparent 100%);
    }
    .api-section {
      background: linear-gradient(180deg, transparent 0%, rgba(139,92,246,0.04) 50%, transparent 100%);
    }
    .api-layout, .channel-layout {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
    }
    .channel-layout.reverse { direction: rtl; }
    .channel-layout.reverse > * { direction: ltr; }

    .sheet-panel, .phone-wrap {
      background: #0a0e17;
      border: 1px solid var(--border-light);
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: 0 24px 64px rgba(0,0,0,0.35);
    }
    .sheet-panel { padding: 0; }
    .sheet-bar {
      display: flex; align-items: center; gap: 8px;
      padding: 12px 16px;
      border-bottom: 1px solid var(--border);
      background: rgba(255,255,255,0.02);
      font-size: 0.75rem; color: var(--text-dim);
    }
    .sheet-bar .dot {
      width: 8px; height: 8px; border-radius: 50%;
      background: var(--cyan); box-shadow: 0 0 8px var(--cyan-glow);
    }
    .sheet-table { width: 100%; border-collapse: collapse; font-size: 0.75rem; }
    .sheet-table th, .sheet-table td {
      padding: 10px 12px; text-align: left;
      border-bottom: 1px solid var(--border);
      color: var(--text-muted);
    }
    .sheet-table th {
      background: rgba(34,211,238,0.06);
      color: var(--text-dim); font-weight: 600; font-size: 0.6875rem;
    }
    .sheet-table tr:last-child td { border-bottom: none; }
    .sheet-table .ok { color: var(--green); font-weight: 600; }
    .sheet-note {
      padding: 14px 16px; font-size: 0.75rem; color: var(--text-dim);
      border-top: 1px solid var(--border); line-height: 1.6;
    }
    .sheet-note strong { color: var(--cyan); font-weight: 600; }

    .phone-wrap {
      max-width: 280px; margin: 0 auto;
      border-radius: 28px; padding: 12px;
      background: linear-gradient(160deg, #151b2b, #0a0e17);
    }
    .phone-screen {
      background: var(--bg-card);
      border-radius: 20px;
      overflow: hidden;
      border: 1px solid var(--border);
    }
    .phone-status {
      display: flex; justify-content: space-between;
      padding: 10px 14px 6px;
      font-size: 0.625rem; color: var(--text-dim);
    }
    .phone-title {
      padding: 4px 14px 12px;
      font-size: 0.9375rem; font-weight: 700; letter-spacing: -0.02em;
    }
    .phone-list { padding: 0 10px 12px; display: flex; flex-direction: column; gap: 8px; }
    .phone-item {
      background: rgba(255,255,255,0.03);
      border: 1px solid var(--border);
      border-radius: 10px; padding: 10px 12px;
    }
    .phone-item .t { font-size: 0.75rem; font-weight: 600; margin-bottom: 4px; }
    .phone-item .s { font-size: 0.6875rem; color: var(--text-dim); }
    .phone-actions {
      display: grid; grid-template-columns: 1fr 1fr; gap: 8px;
      padding: 0 10px 14px;
    }
    .phone-btn {
      text-align: center; font-size: 0.6875rem; font-weight: 600;
      padding: 10px 8px; border-radius: 10px;
      border: 1px solid var(--border); color: var(--text-muted);
    }
    .phone-btn.primary {
      background: rgba(52,211,153,0.15);
      border-color: rgba(52,211,153,0.35);
      color: #6ee7b7;
    }
    .api-benefits { display: flex; flex-direction: column; gap: 20px; }
    .api-benefit {
      display: flex;
      gap: 18px;
      padding: 22px;
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius-sm);
      transition: all 0.3s;
    }
    .api-benefit:hover {
      border-color: rgba(139,92,246,0.3);
      background: var(--bg-card-hover);
      transform: translateX(4px);
    }
    .api-benefit-icon {
      width: 44px; height: 44px;
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.25rem;
      flex-shrink: 0;
    }
    .api-benefit-icon.v { background: rgba(139,92,246,0.15); }
    .api-benefit-icon.c { background: rgba(34,211,238,0.12); }
    .api-benefit-icon.g { background: rgba(52,211,153,0.12); }
    .api-benefit-icon.a { background: rgba(251,191,36,0.12); }
    .api-benefit h4 { font-size: 0.9375rem; font-weight: 700; margin-bottom: 6px; }
    .api-benefit p { font-size: 0.875rem; color: var(--text-muted); line-height: 1.65; }

    .code-panel {
      background: #0a0e17;
      border: 1px solid var(--border-light);
      border-radius: var(--radius);
      overflow: hidden;
      box-shadow: 0 24px 64px rgba(0,0,0,0.4);
    }
    .code-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 14px 20px;
      background: rgba(255,255,255,0.02);
      border-bottom: 1px solid var(--border);
    }
    .code-tabs { display: flex; gap: 4px; }
    .code-tab {
      padding: 5px 12px;
      border-radius: 6px;
      font-size: 0.75rem;
      color: var(--text-dim);
      font-family: var(--font-mono);
      cursor: default;
    }
    .code-tab.on { background: rgba(139,92,246,0.15); color: #c4b5fd; }
    .code-status {
      display: flex;
      align-items: center;
      gap: 6px;
      font-size: 0.6875rem;
      color: var(--green);
      font-family: var(--font-mono);
    }
    .code-status::before {
      content: '';
      width: 6px; height: 6px;
      background: var(--green);
      border-radius: 50%;
    }
    .code-body {
      padding: 24px;
      font-family: var(--font-mono);
      font-size: 0.8125rem;
      line-height: 1.8;
      overflow-x: auto;
    }
    .code-body .kw { color: #c792ea; }
    .code-body .str { color: #c3e88d; }
    .code-body .fn { color: #82aaff; }
    .code-body .cm { color: #546e7a; }
    .code-body .num { color: #f78c6c; }
    .code-body .key { color: #89ddff; }

    .api-endpoints {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 12px;
      margin-top: 48px;
    }
    .endpoint-card {
      padding: 20px;
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius-sm);
      text-align: center;
      transition: border-color 0.3s;
    }
    .endpoint-card:hover { border-color: rgba(34,211,238,0.3); }
    .endpoint-method {
      display: inline-block;
      padding: 3px 8px;
      border-radius: 4px;
      font-size: 0.625rem;
      font-weight: 700;
      font-family: var(--font-mono);
      margin-bottom: 10px;
    }
    .endpoint-method.post { background: rgba(52,211,153,0.15); color: var(--green); }
    .endpoint-method.get { background: rgba(34,211,238,0.12); color: var(--cyan); }
    .endpoint-card .path {
      font-size: 0.75rem;
      font-family: var(--font-mono);
      color: var(--text-muted);
      word-break: break-all;
    }
    .endpoint-card .desc {
      font-size: 0.75rem;
      color: var(--text-dim);
      margin-top: 8px;
    }
    .api-cta {
      display: flex;
      justify-content: center;
      margin-top: 36px;
    }

    /* Bento features */
    .bento {
      display: grid;
      grid-template-columns: repeat(12, 1fr);
      gap: 16px;
    }
    .bento-item {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 32px;
      transition: all 0.35s;
      overflow: hidden;
      position: relative;
    }
    .bento-item:hover {
      border-color: var(--border-light);
      transform: translateY(-2px);
      box-shadow: 0 16px 48px rgba(0,0,0,0.3);
    }
    .bento-item.span-4 { grid-column: span 4; }
    .bento-item.span-6 { grid-column: span 6; }
    .bento-item.span-8 { grid-column: span 8; }
    .bento-item.span-12 { grid-column: span 12; }
    .bento-icon {
      width: 48px; height: 48px;
      border-radius: 14px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.375rem;
      margin-bottom: 20px;
      background: rgba(255,255,255,0.04);
    }
    .bento-item h3 { font-size: 1.0625rem; font-weight: 700; margin-bottom: 10px; letter-spacing: -0.02em; }
    .bento-item p { font-size: 0.875rem; color: var(--text-muted); line-height: 1.7; }
    .bento-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 16px; }
    .bento-tag {
      font-size: 0.6875rem;
      padding: 4px 10px;
      border-radius: 100px;
      background: rgba(255,255,255,0.04);
      color: var(--text-dim);
      border: 1px solid var(--border);
    }

    /* Flow */
    .flow-row {
      display: grid;
      grid-template-columns: repeat(5, 1fr);
      gap: 0;
      position: relative;
    }
    .flow-row::before {
      content: '';
      position: absolute;
      top: 28px;
      left: 10%;
      right: 10%;
      height: 1px;
      background: linear-gradient(90deg, transparent, var(--violet), var(--cyan), transparent);
    }
    .flow-step { text-align: center; position: relative; z-index: 1; }
    .flow-num {
      width: 56px; height: 56px;
      border-radius: 50%;
      background: var(--bg-card);
      border: 1px solid var(--border-light);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1rem;
      font-weight: 800;
      margin: 0 auto 16px;
      color: var(--violet);
    }
    .flow-step h4 { font-size: 0.875rem; font-weight: 700; margin-bottom: 4px; }
    .flow-step p { font-size: 0.75rem; color: var(--text-dim); }

    /* Compare */
    .compare-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 20px;
    }
    .compare-card {
      padding: 36px;
      border-radius: var(--radius);
      border: 1px solid var(--border);
    }
    .compare-card.old {
      background: rgba(255,255,255,0.02);
      opacity: 0.7;
    }
    .compare-card.new {
      background: linear-gradient(135deg, rgba(139,92,246,0.08) 0%, rgba(34,211,238,0.05) 100%);
      border-color: rgba(139,92,246,0.25);
    }
    .compare-label {
      font-size: 0.6875rem;
      font-weight: 700;
      letter-spacing: 0.1em;
      text-transform: uppercase;
      margin-bottom: 16px;
    }
    .compare-card.old .compare-label { color: var(--text-dim); }
    .compare-card.new .compare-label { color: var(--violet); }
    .compare-card h3 { font-size: 1.25rem; font-weight: 800; margin-bottom: 20px; letter-spacing: -0.02em; }
    .compare-list { list-style: none; }
    .compare-list li {
      padding: 10px 0;
      font-size: 0.875rem;
      color: var(--text-muted);
      border-bottom: 1px solid var(--border);
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .compare-list li:last-child { border-bottom: none; }
    .compare-list .x { color: #f87171; }
    .compare-list .check { color: var(--green); }

    /* Pricing */
    .pricing-wrap { max-width: 520px; margin: 0 auto; }
    .pricing-card {
      background: var(--bg-card);
      border: 1px solid rgba(124,140,255,0.28);
      border-radius: var(--radius);
      padding: 44px;
      text-align: center;
      position: relative;
      overflow: hidden;
    }
    .pricing-card::before {
      content: '';
      position: absolute;
      top: 0; left: 0; right: 0;
      height: 3px;
      background: var(--gradient);
    }
    .pricing-badge {
      display: inline-block;
      padding: 6px 14px;
      background: rgba(52,211,153,0.12);
      color: var(--green);
      border-radius: 100px;
      font-size: 0.8125rem;
      font-weight: 700;
      margin-bottom: 24px;
    }
    .pricing-card h3 { font-size: 1.5rem; font-weight: 800; margin-bottom: 8px; }
    .pricing-card .sub { color: var(--text-muted); margin-bottom: 28px; font-size: 0.9375rem; }
    .pricing-amounts {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 12px;
      margin-bottom: 20px;
      text-align: left;
    }
    .pricing-amount {
      background: rgba(255,255,255,0.03);
      border: 1px solid var(--border);
      border-radius: var(--radius-sm);
      padding: 16px 18px;
    }
    .pricing-amount .label {
      display: block;
      font-size: 0.75rem;
      color: var(--text-dim);
      font-weight: 600;
      margin-bottom: 6px;
      letter-spacing: 0.02em;
    }
    .pricing-amount .value {
      display: block;
      font-size: 1.35rem;
      font-weight: 800;
      letter-spacing: -0.03em;
      color: var(--text);
      line-height: 1.2;
    }
    .pricing-amount .value em {
      font-style: normal;
      font-size: 0.8125rem;
      font-weight: 600;
      color: var(--text-muted);
      margin-left: 2px;
    }
    .pricing-amount .note {
      display: block;
      margin-top: 4px;
      font-size: 0.75rem;
      color: var(--text-dim);
    }
    .pricing-tiers {
      list-style: none;
      text-align: left;
      margin-bottom: 28px;
      border: 1px solid var(--border);
      border-radius: var(--radius-sm);
      overflow: hidden;
    }
    .pricing-tiers li {
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 12px;
      padding: 13px 16px;
      font-size: 0.875rem;
      border-bottom: 1px solid var(--border);
      color: var(--text-muted);
    }
    .pricing-tiers li:last-child { border-bottom: none; }
    .pricing-tiers .tier-name { color: var(--text); font-weight: 600; }
    .pricing-tiers .tier-price {
      color: var(--violet);
      font-weight: 700;
      font-family: var(--font-mono);
      font-size: 0.8125rem;
      white-space: nowrap;
    }
    .pricing-vat {
      font-size: 0.8125rem;
      color: var(--text-dim);
      margin: -12px 0 24px;
    }
    .pricing-list { list-style: none; text-align: left; margin-bottom: 32px; }
    .pricing-list li {
      padding: 11px 0;
      border-bottom: 1px solid var(--border);
      font-size: 0.875rem;
      color: var(--text-muted);
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .pricing-list li::before { content: '→'; color: var(--violet); font-weight: 700; }
    @media (max-width: 520px) {
      .pricing-amounts { grid-template-columns: 1fr; }
      .pricing-card { padding: 32px 22px; }
    }

    /* Support */
    .support-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
    .support-box {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius-sm);
      overflow: hidden;
    }
    .support-head {
      padding: 18px 24px;
      font-weight: 700;
      font-size: 0.9375rem;
      border-bottom: 1px solid var(--border);
      background: rgba(255,255,255,0.02);
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 12px;
    }
    .support-more {
      font-size: 0.75rem;
      font-weight: 600;
      color: var(--violet);
    }
    .support-more:hover { color: var(--cyan); }
    .support-list { list-style: none; }
    .support-list li { border-bottom: 1px solid var(--border); }
    .support-list li:last-child { border-bottom: none; }
    .support-list a {
      padding: 13px 24px;
      font-size: 0.875rem;
      color: var(--text-muted);
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 12px;
      transition: background 0.2s, color 0.2s;
    }
    .support-list a:hover { background: rgba(255,255,255,0.02); color: var(--text); }
    .support-list a span:first-child {
      overflow: hidden;
      text-overflow: ellipsis;
      white-space: nowrap;
    }
    .support-list .date { color: var(--text-dim); font-size: 0.8125rem; flex-shrink: 0; }
    .faq-item { padding: 16px 24px; border-bottom: 1px solid var(--border); }
    .faq-item:last-child { border-bottom: none; }
    .faq-q { font-weight: 600; font-size: 0.875rem; margin-bottom: 6px; }
    .faq-a { font-size: 0.8125rem; color: var(--text-muted); line-height: 1.65; }

    /* CTA */
    .cta {
      text-align: center;
      padding: 80px 0;
      position: relative;
      z-index: 1;
    }
    .cta-box {
      background: var(--bg-card);
      border: 1px solid var(--border-light);
      border-radius: var(--radius);
      padding: 72px 48px;
      position: relative;
      overflow: hidden;
    }
    .cta-box::before {
      content: '';
      position: absolute;
      inset: 0;
      background: radial-gradient(ellipse at 50% 0%, var(--violet-glow) 0%, transparent 60%);
      pointer-events: none;
    }
    .cta-box h2 {
      font-size: clamp(1.75rem, 3vw, 2.25rem);
      font-weight: 800;
      margin-bottom: 14px;
      letter-spacing: -0.03em;
      position: relative;
    }
    .cta-box p {
      color: var(--text-muted);
      margin-bottom: 32px;
      font-size: 1.0625rem;
      position: relative;
    }
    .cta-actions { display: flex; justify-content: center; gap: 14px; flex-wrap: wrap; position: relative; }

    /* Highlights strip */
    .highlights {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 14px;
      margin-top: -40px;
      margin-bottom: 20px;
      position: relative;
      z-index: 2;
    }
    .highlight-card {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius-sm);
      padding: 22px 20px;
      text-align: left;
    }
    .highlight-card strong {
      display: block;
      font-size: 0.9375rem;
      font-weight: 700;
      margin-bottom: 6px;
      letter-spacing: -0.02em;
    }
    .highlight-card span {
      font-size: 0.8125rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* Audience */
    .audience-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
    }
    .audience-card {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 28px 24px;
      transition: border-color 0.3s, transform 0.3s;
    }
    .audience-card:hover {
      border-color: var(--border-light);
      transform: translateY(-2px);
    }
    .audience-card .who {
      font-size: 0.75rem;
      font-weight: 700;
      color: var(--violet);
      letter-spacing: 0.06em;
      margin-bottom: 10px;
    }
    .audience-card h3 {
      font-size: 1.0625rem;
      font-weight: 700;
      margin-bottom: 10px;
      letter-spacing: -0.02em;
    }
    .audience-card p {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.7;
    }
    .audience-card ul {
      list-style: none;
      margin-top: 16px;
    }
    .audience-card li {
      font-size: 0.8125rem;
      color: var(--text-muted);
      padding: 6px 0;
      display: flex;
      gap: 8px;
    }
    .audience-card li::before {
      content: '·';
      color: var(--cyan);
      font-weight: 700;
    }

    /* Supported services */
    .service-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
    }
    .service-card {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 26px 22px;
      transition: border-color 0.3s, transform 0.3s;
    }
    .service-card:hover {
      border-color: var(--border-light);
      transform: translateY(-2px);
    }
    .service-card .svc-icon {
      width: 42px; height: 42px;
      border-radius: 12px;
      display: flex; align-items: center; justify-content: center;
      font-size: 1.2rem;
      margin-bottom: 14px;
      background: rgba(139,92,246,0.12);
    }
    .service-card:nth-child(2) .svc-icon { background: rgba(34,211,238,0.12); }
    .service-card:nth-child(3) .svc-icon { background: rgba(52,211,153,0.12); }
    .service-card:nth-child(4) .svc-icon { background: rgba(251,191,36,0.12); }
    .service-card:nth-child(5) .svc-icon { background: rgba(139,92,246,0.12); }
    .service-card:nth-child(6) .svc-icon { background: rgba(34,211,238,0.12); }
    .service-card h3 {
      font-size: 1rem;
      font-weight: 700;
      margin-bottom: 8px;
      letter-spacing: -0.02em;
    }
    .service-card p {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.7;
    }

    /* Trust / reliability */
    .trust-stats {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
      margin-bottom: 28px;
    }
    .trust-stat {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 28px 22px;
      text-align: center;
    }
    .trust-stat .num {
      font-size: clamp(1.75rem, 3vw, 2.25rem);
      font-weight: 800;
      letter-spacing: -0.03em;
      background: var(--gradient);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      margin-bottom: 8px;
    }
    .trust-stat.uptime .num {
      font-size: clamp(1.55rem, 2.8vw, 2rem);
      margin-bottom: 10px;
      letter-spacing: -0.02em;
    }
    .trust-stat .uptime-tick {
      font-family: 'JetBrains Mono', ui-monospace, monospace;
      font-size: clamp(0.68rem, 1.35vw, 0.8rem);
      font-weight: 500;
      letter-spacing: -0.01em;
      line-height: 1.55;
      color: var(--cyan);
      margin-bottom: 12px;
      font-variant-numeric: tabular-nums;
      word-break: keep-all;
    }
    .trust-stat .lbl {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.55;
    }
    .trust-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 16px;
    }
    .trust-card {
      background: var(--bg-card);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 28px 26px;
    }
    .trust-card h3 {
      font-size: 1.0625rem;
      font-weight: 700;
      margin-bottom: 10px;
      letter-spacing: -0.02em;
    }
    .trust-card p {
      font-size: 0.875rem;
      color: var(--text-muted);
      line-height: 1.75;
    }
    .pay-chips {
      display: flex;
      flex-wrap: wrap;
      gap: 8px;
      margin-top: 16px;
    }
    .pay-chip {
      font-size: 0.75rem;
      font-weight: 600;
      padding: 7px 12px;
      border-radius: 999px;
      border: 1px solid var(--border-light);
      color: var(--text-muted);
      background: rgba(255,255,255,0.02);
    }

    /* Footer */
    .footer {
      position: relative;
      z-index: 1;
      border-top: 1px solid var(--border);
      padding: 64px 0 40px;
    }
    .footer-notice {
      padding: 14px 18px;
      margin-bottom: 36px;
      border-radius: var(--radius-sm);
      border: 1px solid rgba(124,140,255,0.22);
      background: rgba(124,140,255,0.06);
      color: var(--text-muted);
      font-size: 0.8125rem;
      line-height: 1.65;
      letter-spacing: -0.01em;
    }
    .footer-notice strong {
      display: block;
      color: var(--violet);
      font-size: 0.6875rem;
      font-weight: 800;
      letter-spacing: 0.08em;
      text-transform: uppercase;
      margin-bottom: 6px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 40px;
      margin-bottom: 36px;
    }
    .footer-brand .brand-row {
      display: inline-flex;
      align-items: center;
      gap: 10px;
    }
    .footer-brand .brand-row .logo { display: inline-flex; align-items: center; }
    .footer-brand .brand-row .logo img { display: block; }
    .footer-brand p { font-size: 0.8125rem; color: var(--text-dim); margin-top: 14px; line-height: 1.7; }
    .footer-brand .brand-tag {
      display: inline-flex; align-items: center;
      font-size: 0.6875rem; font-weight: 700;
      letter-spacing: 0.06em; text-transform: uppercase;
      color: var(--text-dim);
      padding: 3px 8px;
      border-radius: 999px;
      border: 1px solid var(--border);
      white-space: nowrap;
    }
    .footer-meta {
      list-style: none;
      margin-top: 16px;
      display: flex; flex-direction: column; gap: 5px;
      font-size: 0.75rem; line-height: 1.65; color: var(--text-dim);
    }
    .footer-meta li { word-break: keep-all; }
    .footer-meta .sep { margin: 0 6px; color: rgba(255,255,255,0.18); }
    .footer-col h4 { font-size: 0.8125rem; font-weight: 700; margin-bottom: 16px; color: var(--text-muted); }
    .footer-col ul { list-style: none; }
    .footer-col li { margin-bottom: 10px; }
    .footer-col a, .footer-col span { font-size: 0.8125rem; color: var(--text-dim); transition: color 0.2s; }
    .footer-col a:hover { color: var(--text); }
    .footer-phone { font-size: 1.125rem; font-weight: 700; color: var(--text); }
    .footer-phone:hover { color: var(--cyan); }
    .footer-bottom {
      padding-top: 24px;
      border-top: 1px solid var(--border);
      display: flex;
      justify-content: space-between;
      align-items: center;
      gap: 12px;
      flex-wrap: wrap;
      font-size: 0.75rem;
      color: var(--text-dim);
    }
    .footer-bottom a { color: var(--text-dim); transition: color 0.2s; }
    .footer-bottom a:hover { color: var(--text-muted); }

    /* Responsive */
    @media (max-width: 1024px) {
      .api-layout, .channel-layout { grid-template-columns: 1fr; }
      .channel-layout.reverse { direction: ltr; }
      .api-endpoints { grid-template-columns: repeat(2, 1fr); }
      .bento-item.span-4, .bento-item.span-6, .bento-item.span-8 { grid-column: span 6; }
      .flow-row { grid-template-columns: repeat(3, 1fr); gap: 24px; }
      .flow-row::before { display: none; }
      .footer-grid { grid-template-columns: 1fr 1fr; }
      .service-grid { grid-template-columns: 1fr 1fr; }
      .trust-grid { grid-template-columns: 1fr; }
      .insight-grid { grid-template-columns: 1fr 1fr; }
      .insight-card:first-child { grid-column: span 2; }
    }
    @media (max-width: 768px) {
      .nav-links { display: none; }
      .nav-actions { display: flex; }
      .nav-actions .btn { padding: 8px 14px; font-size: 0.8125rem; }
      .nav-actions .btn-outline { display: none; }
      .mobile-toggle { display: block; }
      .nav { gap: 12px; }
      .preview-nav { display: none; }
      .preview-grid { grid-template-columns: 1fr 1fr; }
      .preview-charts { grid-template-columns: 1fr; }
      .bento-item.span-4, .bento-item.span-6, .bento-item.span-8, .bento-item.span-12 { grid-column: span 12; }
      .api-endpoints { grid-template-columns: 1fr; }
      .compare-grid, .support-grid { grid-template-columns: 1fr; }
      .flow-row { grid-template-columns: 1fr 1fr; }
      .footer-grid { grid-template-columns: 1fr; }
      .footer-bottom { flex-direction: column; gap: 8px; text-align: center; }
      .cta-box { padding: 48px 24px; }
      .highlights { grid-template-columns: 1fr 1fr; margin-top: 0; }
      .audience-grid { grid-template-columns: 1fr; }
      .service-grid { grid-template-columns: 1fr; }
      .trust-stats { grid-template-columns: 1fr; }
      .insight-grid { grid-template-columns: 1fr; }
      .insight-card:first-child { grid-column: span 1; }
      .donut-wrap { flex-direction: column; align-items: flex-start; }
      .arch-diagram { padding: 20px 12px; }
    }

    /* Scroll reveal (+ optional --py parallax) */
    .reveal {
      opacity: 0;
      transform: translate3d(0, calc(36px + var(--py, 0px)), 0);
      transition:
        opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1),
        transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
      transition-delay: var(--reveal-delay, 0ms);
      will-change: opacity, transform;
    }
    .reveal-left {
      opacity: 0;
      transform: translate3d(-40px, calc(20px + var(--py, 0px)), 0);
      transition:
        opacity 0.75s cubic-bezier(0.22, 1, 0.36, 1),
        transform 0.75s cubic-bezier(0.22, 1, 0.36, 1);
      transition-delay: var(--reveal-delay, 0ms);
      will-change: opacity, transform;
    }
    .reveal-right {
      opacity: 0;
      transform: translate3d(40px, calc(20px + var(--py, 0px)), 0);
      transition:
        opacity 0.75s cubic-bezier(0.22, 1, 0.36, 1),
        transform 0.75s cubic-bezier(0.22, 1, 0.36, 1);
      transition-delay: var(--reveal-delay, 0ms);
      will-change: opacity, transform;
    }
    .reveal-scale {
      opacity: 0;
      transform: translate3d(0, calc(24px + var(--py, 0px)), 0) scale(0.96);
      transition:
        opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1),
        transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
      transition-delay: var(--reveal-delay, 0ms);
      will-change: opacity, transform;
    }
    .reveal.is-in {
      opacity: 1;
      transform: translate3d(0, var(--py, 0px), 0);
    }
    .reveal-left.is-in,
    .reveal-right.is-in {
      opacity: 1;
      transform: translate3d(0, var(--py, 0px), 0);
    }
    .reveal-scale.is-in {
      opacity: 1;
      transform: translate3d(0, var(--py, 0px), 0) scale(1);
    }
    .parallax-target.is-in {
      transition:
        opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1),
        transform 0.12s linear;
    }
    .ambient-orb { will-change: transform; }
    @media (prefers-reduced-motion: reduce) {
      .reveal, .reveal-left, .reveal-right, .reveal-scale {
        opacity: 1 !important;
        transform: none !important;
        transition: none !important;
      }
      .ambient-orb { transform: none !important; }
    }

    .kakao-chat {
      position: fixed; right: 24px; bottom: 24px; z-index: 9999;
      width: 58px; height: 58px;
      display: flex; align-items: center; justify-content: center;
      border-radius: 50%;
      background: #FEE500;
      color: #191600;
      box-shadow:
        0 8px 24px rgba(254, 229, 0, 0.35),
        0 4px 12px rgba(0, 0, 0, 0.28);
      transition: transform 0.22s ease, box-shadow 0.22s ease;
    }
    .kakao-chat::before {
      content: '';
      position: absolute; inset: -4px;
      border-radius: 50%;
      border: 2px solid rgba(254, 229, 0, 0.45);
      animation: kakao-ring 2.4s ease-out infinite;
      pointer-events: none;
    }
    .kakao-chat:hover {
      transform: translateY(-3px) scale(1.04);
      box-shadow:
        0 12px 32px rgba(254, 229, 0, 0.45),
        0 6px 16px rgba(0, 0, 0, 0.3);
    }
    .kakao-chat svg { width: 30px; height: 30px; display: block; }
    @keyframes kakao-ring {
      0% { transform: scale(0.92); opacity: 0.75; }
      70% { transform: scale(1.18); opacity: 0; }
      100% { transform: scale(1.18); opacity: 0; }
    }
    @media (max-width: 640px) {
      .kakao-chat { right: 16px; bottom: 16px; width: 52px; height: 52px; }
      .kakao-chat svg { width: 26px; height: 26px; }
    }
    @media (prefers-reduced-motion: reduce) {
      .kakao-chat::before { animation: none; }
    }