/* ============================================================
       CSS Variables
    ============================================================ */
    :root {
      --bg:        #0a1628;
      --bg2:       #060f1d;
      --surface:   #0f1e36;
      --surface2:  #162845;
      --accent:    #00d4ff;
      --accent2:   #0091ff;
      --accent-glow: rgba(0, 212, 255, 0.25);
      --text:      #e2eaf4;
      --text-muted:#7a9ab8;
      --border:    rgba(0, 212, 255, 0.15);
      --border2:   rgba(0, 212, 255, 0.35);
      --radius:    12px;
      --radius-lg: 20px;
      --font-display: 'Rajdhani', 'Noto Sans SC', sans-serif;
      --font-body:    'Noto Sans SC', sans-serif;
    }

    /* ============================================================
       Reset & Base
    ============================================================ */
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

    html { scroll-behavior: smooth; }

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

    a { color: inherit; text-decoration: none; }
    img { max-width: 100%; display: block; }

    /* ============================================================
       Scrollbar
    ============================================================ */
    ::-webkit-scrollbar { width: 6px; }
    ::-webkit-scrollbar-track { background: var(--bg); }
    ::-webkit-scrollbar-thumb { background: var(--accent2); border-radius: 3px; }

    /* ============================================================
       Background Grid Pattern
    ============================================================ */
    .bg-grid {
      position: fixed; inset: 0; z-index: 0; pointer-events: none;
      background-image:
        linear-gradient(rgba(0, 212, 255, 0.04) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 212, 255, 0.04) 1px, transparent 1px);
      background-size: 60px 60px;
      mask-image: radial-gradient(ellipse 80% 80% at 50% 0%, black 30%, transparent 100%);
    }

    /* ============================================================
       Layout
    ============================================================ */
    .container {
      max-width: 1180px;
      margin: 0 auto;
      padding: 0 24px;
      position: relative;
      z-index: 1;
    }

    /* ============================================================
       NAVBAR
    ============================================================ */
    .navbar {
      position: fixed; top: 0; left: 0; right: 0; z-index: 100;
      padding: 0 24px;
      transition: background 0.3s, box-shadow 0.3s;
    }
    .navbar.scrolled {
      background: rgba(6, 15, 29, 0.92);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      box-shadow: 0 1px 0 var(--border), 0 4px 24px rgba(0,0,0,0.4);
    }
    .navbar-inner {
      max-width: 1180px; margin: 0 auto;
      display: flex; align-items: center; justify-content: space-between;
      height: 68px;
    }
    .nav-brand {
      display: flex; align-items: center; gap: 10px;
      font-family: var(--font-display);
      font-size: 22px; font-weight: 700;
      letter-spacing: 0.5px;
      line-height: 1;
    }
    .nav-brand-text {
      display: inline;
      position: relative;
      font-family: var(--font-display);
      font-size: 22px; font-weight: 700;
      letter-spacing: 0.5px;
      color: var(--text);
    }
    .nav-brand .trademark {
      font-size: 18px;
      font-weight: 600;
      color: var(--accent);
      position: absolute;
      top: -3px;
      right: -10px;
      letter-spacing: 0.2px;
      opacity: 0.85;
    }
    .nav-brand-icon {
      width: 36px; height: 36px;
      background: linear-gradient(135deg, var(--accent), var(--accent2));
      border-radius: 8px;
      display: flex; align-items: center; justify-content: center;
      box-shadow: 0 0 16px var(--accent-glow);
      flex-shrink: 0;
    }
    .nav-brand-icon svg { width: 20px; height: 20px; fill: #fff; }
    .nav-links {
      display: flex; align-items: center; gap: 32px;
      list-style: none;
    }
    .nav-links a {
      font-size: 14px; font-weight: 500;
      color: var(--text-muted);
      transition: color 0.2s;
    }
    .nav-links a:hover { color: var(--accent); }
    .nav-links li:not(:last-child)::after { content: '·'; margin-left: 16px; color: var(--border); }
    .nav-links li:last-child a { padding-right: 0; }

    .nav-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }

    /* ============================================================
       HERO
    ============================================================ */
    .hero {
      min-height: 100vh;
      display: flex; flex-direction: column; align-items: center; justify-content: center;
      text-align: center;
      padding: 120px 24px 80px;
      position: relative;
      overflow: hidden;
    }

    /* Ambient glow orbs */
    .hero::before {
      content: '';
      position: absolute;
      top: -20%; left: 50%; transform: translateX(-50%);
      width: 700px; height: 500px;
      background: radial-gradient(ellipse, rgba(0, 212, 255, 0.12) 0%, transparent 70%);
      pointer-events: none;
    }
    .hero::after {
      content: '';
      position: absolute;
      bottom: -10%; right: -10%;
      width: 400px; height: 400px;
      background: radial-gradient(circle, rgba(0, 145, 255, 0.08) 0%, transparent 70%);
      pointer-events: none;
    }

    /* Floating coordinate rings */
    .hero-rings {
      position: absolute;
      top: 50%; left: 50%;
      transform: translate(-50%, -50%);
      width: 600px; height: 600px;
      pointer-events: none;
      opacity: 0.07;
    }
    .hero-rings circle {
      fill: none; stroke: var(--accent); stroke-width: 0.5;
    }

    .hero-eyebrow {
      display: inline-flex; align-items: center; gap: 8px;
      background: rgba(0, 212, 255, 0.08);
      border: 1px solid var(--border2);
      border-radius: 100px;
      padding: 6px 16px;
      font-size: 13px;
      font-weight: 500;
      color: var(--accent);
      letter-spacing: 0.5px;
      margin-bottom: 28px;
      animation: fadeSlideDown 0.6s ease both;
    }
    .hero-eyebrow-dot {
      width: 6px; height: 6px;
      background: var(--accent);
      border-radius: 50%;
      animation: pulse-dot 2s ease-in-out infinite;
    }

    .hero-title {
      font-family: var(--font-display);
      font-size: clamp(44px, 8vw, 88px);
      font-weight: 700;
      line-height: 1.05;
      letter-spacing: -1px;
      margin-bottom: 12px;
      animation: fadeSlideDown 0.6s 0.1s ease both;
    }
    .hero-title-brand {
      display: block;
      background: linear-gradient(135deg, #fff 30%, var(--accent) 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .hero-title-product {
      display: block;
      font-size: 0.55em;
      font-weight: 500;
      letter-spacing: 8px;
      color: var(--text-muted);
      -webkit-text-fill-color: var(--text-muted);
      margin-top: 8px;
    }

    .hero-subtitle {
      font-size: clamp(16px, 2.5vw, 20px);
      font-weight: 300;
      color: var(--text-muted);
      max-width: 520px;
      margin: 0 auto 48px;
      line-height: 1.7;
      animation: fadeSlideDown 0.6s 0.2s ease both;
    }

    .hero-cta {
      display: flex; gap: 16px; flex-wrap: wrap; justify-content: center;
      animation: fadeSlideDown 0.6s 0.3s ease both;
    }

    /* ============================================================
       BUTTONS
    ============================================================ */
    .btn {
      display: inline-flex; align-items: center; gap: 8px;
      padding: 14px 32px;
      border-radius: var(--radius);
      font-family: var(--font-body);
      font-size: 15px; font-weight: 500;
      cursor: pointer;
      border: none;
      transition: all 0.25s ease;
      position: relative;
      overflow: hidden;
    }
    .btn::before {
      content: '';
      position: absolute; inset: 0;
      opacity: 0;
      transition: opacity 0.25s;
    }
    .btn:hover::before { opacity: 1; }

    .btn-primary {
      background: linear-gradient(135deg, var(--accent), var(--accent2));
      color: #fff;
      box-shadow: 0 4px 24px rgba(0, 212, 255, 0.35);
    }
    .btn-primary::before {
      background: linear-gradient(135deg, rgba(255,255,255,0.15), transparent);
    }
    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 32px rgba(0, 212, 255, 0.5);
    }
    .btn-primary:active { transform: translateY(0); }

    .btn-outline {
      background: transparent;
      color: var(--text);
      border: 1px solid var(--border2);
    }
    .btn-outline::before {
      background: rgba(0, 212, 255, 0.06);
    }
    .btn-outline:hover {
      border-color: var(--accent);
      color: var(--accent);
      transform: translateY(-2px);
      box-shadow: 0 4px 16px rgba(0, 212, 255, 0.12);
    }
    .btn-outline:active { transform: translateY(0); }

    .btn svg { width: 18px; height: 18px; flex-shrink: 0; }

    .btn-sm {
      padding: 8px 18px;
      font-size: 13px;
    }

    /* ============================================================
       SCROLL DOWN HINT
    ============================================================ */
    .scroll-hint {
      position: absolute; bottom: 36px; left: 50%; transform: translateX(-50%);
      display: flex; flex-direction: column; align-items: center; gap: 8px;
      color: var(--text-muted); font-size: 12px; letter-spacing: 1px;
      animation: fadeSlideDown 0.6s 0.6s ease both;
    }
    .scroll-hint-line {
      width: 1px; height: 40px;
      background: linear-gradient(to bottom, var(--accent), transparent);
      animation: scroll-line 2s ease-in-out infinite;
    }

    /* ============================================================
       SECTION COMMONS
    ============================================================ */
    .section {
      padding: 100px 0;
      position: relative;
    }
    .section-label {
      display: inline-flex; align-items: center; gap: 8px;
      font-family: var(--font-display);
      font-size: 12px; font-weight: 600;
      letter-spacing: 3px; text-transform: uppercase;
      color: var(--accent);
      margin-bottom: 16px;
    }
    .section-label::before {
      content: '';
      width: 24px; height: 1px;
      background: var(--accent);
    }
    .section-title {
      font-family: var(--font-display);
      font-size: clamp(28px, 4vw, 44px);
      font-weight: 700;
      line-height: 1.15;
      margin-bottom: 16px;
    }
    .section-desc {
      font-size: 16px; color: var(--text-muted);
      max-width: 560px;
      line-height: 1.7;
    }

    /* ============================================================
       FEATURES
    ============================================================ */
    .features { background: var(--bg2); }

    .features-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
      gap: 20px;
      margin-top: 60px;
    }

    .feature-card {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      padding: 36px 28px;
      position: relative;
      overflow: hidden;
      transition: border-color 0.3s, transform 0.3s, box-shadow 0.3s;
      opacity: 0;
      transform: translateY(24px);
    }
    .feature-card.visible {
      opacity: 1; transform: translateY(0);
      transition: opacity 0.5s ease, transform 0.5s ease, border-color 0.3s, box-shadow 0.3s;
    }
    .feature-card::before {
      content: '';
      position: absolute; top: 0; left: 0; right: 0; height: 2px;
      background: linear-gradient(90deg, transparent, var(--accent), transparent);
      opacity: 0;
      transition: opacity 0.3s;
    }
    .feature-card:hover {
      border-color: var(--border2);
      transform: translateY(-4px);
      box-shadow: 0 16px 48px rgba(0, 0, 0, 0.4), 0 0 32px var(--accent-glow);
    }
    .feature-card:hover::before { opacity: 1; }

    .feature-icon {
      width: 52px; height: 52px;
      border-radius: 12px;
      display: flex; align-items: center; justify-content: center;
      margin-bottom: 24px;
      position: relative;
    }
    .feature-icon::after {
      content: '';
      position: absolute; inset: 0;
      border-radius: 12px;
      opacity: 0.15;
    }
    .feature-icon svg { width: 26px; height: 26px; position: relative; z-index: 1; }

    .feature-card:nth-child(1) .feature-icon { background: rgba(0, 212, 255, 0.12); }
    .feature-card:nth-child(1) .feature-icon svg { fill: var(--accent); }
    .feature-card:nth-child(1) .feature-icon::after { background: var(--accent); }

    .feature-card:nth-child(2) .feature-icon { background: rgba(0, 145, 255, 0.12); }
    .feature-card:nth-child(2) .feature-icon svg { fill: #0091ff; }
    .feature-card:nth-child(2) .feature-icon::after { background: #0091ff; }

    .feature-card:nth-child(3) .feature-icon { background: rgba(0, 200, 160, 0.12); }
    .feature-card:nth-child(3) .feature-icon svg { fill: #00c8a0; }
    .feature-card:nth-child(3) .feature-icon::after { background: #00c8a0; }

    .feature-card:nth-child(4) .feature-icon { background: rgba(120, 80, 255, 0.12); }
    .feature-card:nth-child(4) .feature-icon svg { fill: #7850ff; }
    .feature-card:nth-child(4) .feature-icon::after { background: #7850ff; }


    .feature-card-title {
      font-family: var(--font-display);
      font-size: 20px; font-weight: 600;
      margin-bottom: 12px;
      letter-spacing: 0.3px;
    }
    .feature-card-desc {
      font-size: 14px; color: var(--text-muted);
      line-height: 1.7;
    }

    /* ============================================================
       SCENARIOS
    ============================================================ */
    .scenarios { background: var(--bg); }

    .scenarios-inner {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 64px;
      align-items: center;
      margin-top: 60px;
    }

    .scenario-list {
      list-style: none;
      display: flex; flex-direction: column; gap: 20px;
    }
    .scenario-item {
      display: flex; align-items: flex-start; gap: 16px;
      padding: 24px;
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      transition: border-color 0.3s, transform 0.3s;
      opacity: 0;
      transform: translateX(-20px);
    }
    .scenario-item.visible {
      opacity: 1; transform: translateX(0);
      transition: opacity 0.5s ease, transform 0.5s ease, border-color 0.3s;
    }
    .scenario-item:hover {
      border-color: var(--border2);
      transform: translateX(4px);
    }
    .scenario-icon {
      width: 44px; height: 44px; flex-shrink: 0;
      border-radius: 10px;
      display: flex; align-items: center; justify-content: center;
    }
    .scenario-icon svg { width: 22px; height: 22px; }
    .scenario-item:nth-child(1) .scenario-icon { background: rgba(0,212,255,0.12); }
    .scenario-item:nth-child(1) .scenario-icon svg { fill: var(--accent); }
    .scenario-item:nth-child(2) .scenario-icon { background: rgba(0,145,255,0.12); }
    .scenario-item:nth-child(2) .scenario-icon svg { fill: var(--accent2); }
    .scenario-item:nth-child(3) .scenario-icon { background: rgba(0,200,160,0.12); }
    .scenario-item:nth-child(3) .scenario-icon svg { fill: #00c8a0; }
    .scenario-text h4 {
      font-family: var(--font-display);
      font-size: 17px; font-weight: 600;
      margin-bottom: 6px;
    }
    .scenario-text p {
      font-size: 13px; color: var(--text-muted); line-height: 1.6;
    }

    .scenario-visual {
      position: relative;
      display: flex; align-items: center; justify-content: center;
      height: 360px;
    }
    .map-placeholder {
      position: relative; width: 100%; height: 100%;
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius-lg);
      overflow: hidden;
    }
    .map-grid {
      position: absolute; inset: 0;
      background-image:
        linear-gradient(rgba(0,212,255,0.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0,212,255,0.06) 1px, transparent 1px);
      background-size: 32px 32px;
    }
    .map-center-dot {
      position: absolute; top: 50%; left: 50%;
      transform: translate(-50%, -50%);
      width: 12px; height: 12px;
      background: var(--accent);
      border-radius: 50%;
      box-shadow: 0 0 0 4px rgba(0,212,255,0.25), 0 0 0 8px rgba(0,212,255,0.1);
      animation: ping 2s ease-in-out infinite;
    }
    .map-center-cross {
      position: absolute; top: 50%; left: 50%;
      transform: translate(-50%, -50%);
      width: 40px; height: 40px;
    }
    .map-center-cross::before, .map-center-cross::after {
      content: ''; position: absolute;
      background: rgba(0,212,255,0.5);
    }
    .map-center-cross::before { top: 50%; left: 0; right: 0; height: 1px; }
    .map-center-cross::after { left: 50%; top: 0; bottom: 0; width: 1px; }

    /* Floating map labels */
    .map-label {
      position: absolute;
      padding: 6px 12px;
      background: rgba(10, 22, 40, 0.88);
      border: 1px solid var(--border);
      border-radius: 6px;
      font-size: 11px;
      font-family: var(--font-display);
      font-weight: 600;
      color: var(--accent);
      letter-spacing: 0.5px;
      white-space: nowrap;
      backdrop-filter: blur(8px);
    }
    .map-label.l1 { top: 18%; left: 12%; animation: float 4s ease-in-out infinite; }
    .map-label.l2 { top: 15%; right: 10%; animation: float 4.5s ease-in-out infinite 0.5s; }
    .map-label.l3 { bottom: 18%; left: 15%; animation: float 3.8s ease-in-out infinite 1s; }
    .map-label.l4 { bottom: 15%; right: 12%; animation: float 5s ease-in-out infinite 0.3s; }
    .map-label.l5 { top: 45%; left: 6%; animation: float 4.2s ease-in-out infinite 0.8s; }

    /* ============================================================
       CONTACT
    ============================================================ */
    .contact { background: var(--bg2); }

    .contact-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
      margin-top: 60px;
    }

    .contact-card {
      background: var(--surface);
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 32px 24px;
      text-align: center;
      transition: border-color 0.3s, transform 0.3s;
      opacity: 0;
      transform: translateY(20px);
    }
    .contact-card.visible {
      opacity: 1; transform: translateY(0);
      transition: opacity 0.5s ease, transform 0.5s ease, border-color 0.3s;
    }
    .contact-card:hover { border-color: var(--border2); transform: translateY(-3px); }
    .contact-card-icon {
      width: 48px; height: 48px; margin: 0 auto 16px;
      border-radius: 12px;
      display: flex; align-items: center; justify-content: center;
    }
    .contact-card-icon svg { width: 24px; height: 24px; }
    .contact-card:nth-child(1) .contact-card-icon { background: rgba(0,212,255,0.12); }
    .contact-card:nth-child(1) .contact-card-icon svg { fill: var(--accent); }
    .contact-card:nth-child(2) .contact-card-icon { background: rgba(0,200,100,0.12); }
    .contact-card:nth-child(2) .contact-card-icon svg { fill: #00c864; }
    .contact-card:nth-child(3) .contact-card-icon { background: rgba(0,145,255,0.12); }
    .contact-card:nth-child(3) .contact-card-icon svg { fill: var(--accent2); }
    .contact-card-label {
      font-size: 12px; color: var(--text-muted);
      margin-bottom: 8px;
      letter-spacing: 1px;
    }
    .contact-card-value {
      font-family: var(--font-display);
      font-size: 18px; font-weight: 600;
      color: var(--text);
    }

    /* ============================================================
       FOOTER
    ============================================================ */
    .footer {
      background: var(--bg);
      border-top: 1px solid var(--border);
      padding: 40px 0;
      text-align: center;
    }
    .footer-brand {
      font-family: var(--font-display);
      font-size: 18px; font-weight: 700;
      color: var(--accent);
      margin-bottom: 12px;
      letter-spacing: 1px;
    }
    .footer-copy {
      font-size: 13px; color: var(--text-muted);
    }

    /* ============================================================
       QR MODAL
    ============================================================ */
    .modal-overlay {
      position: fixed; inset: 0; z-index: 1000;
      background: rgba(6, 15, 29, 0.88);
      backdrop-filter: blur(8px);
      display: flex; align-items: center; justify-content: center;
      opacity: 0; visibility: hidden;
      transition: opacity 0.25s, visibility 0.25s;
    }
    .modal-overlay.open { opacity: 1; visibility: visible; }

    .modal {
      background: var(--surface);
      border: 1px solid var(--border2);
      border-radius: var(--radius-lg);
      padding: 48px 40px;
      text-align: center;
      max-width: 360px; width: 90%;
      transform: scale(0.92) translateY(12px);
      transition: transform 0.25s;
      box-shadow: 0 24px 64px rgba(0,0,0,0.6), 0 0 48px var(--accent-glow);
    }
    .modal-overlay.open .modal { transform: scale(1) translateY(0); }

    .modal-title {
      font-family: var(--font-display);
      font-size: 22px; font-weight: 700;
      margin-bottom: 8px;
    }
    .modal-sub {
      font-size: 13px; color: var(--text-muted);
      margin-bottom: 32px;
    }
    .qr-image {
      width: 200px; height: 200px;
      background: #fff;
      border-radius: 12px;
      margin: 0 auto 24px;
      display: block;
      object-fit: contain;
      padding: 16px;
      box-sizing: border-box;
    }
    .modal-hint {
      font-size: 12px; color: var(--text-muted);
      line-height: 1.6;
    }
    .modal-close {
      position: absolute; top: 16px; right: 16px;
      width: 32px; height: 32px;
      background: var(--surface2);
      border: 1px solid var(--border);
      border-radius: 50%;
      cursor: pointer;
      display: flex; align-items: center; justify-content: center;
      transition: background 0.2s;
    }
    .modal-close:hover { background: var(--border); }
    .modal-close svg { width: 14px; height: 14px; fill: var(--text-muted); }

    /* ============================================================
       ANIMATIONS
    ============================================================ */
    @keyframes fadeSlideDown {
      from { opacity: 0; transform: translateY(-16px); }
      to   { opacity: 1; transform: translateY(0); }
    }
    @keyframes pulse-dot {
      0%, 100% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.5; transform: scale(0.7); }
    }
    @keyframes scroll-line {
      0% { transform: scaleY(0); transform-origin: top; opacity: 0; }
      50% { transform: scaleY(1); transform-origin: top; opacity: 1; }
      51% { transform-origin: bottom; }
      100% { transform: scaleY(0); transform-origin: bottom; opacity: 0; }
    }
    @keyframes ping {
      0% { box-shadow: 0 0 0 0 rgba(0,212,255,0.5), 0 0 0 0 rgba(0,212,255,0.2); }
      70% { box-shadow: 0 0 0 8px rgba(0,212,255,0), 0 0 0 16px rgba(0,212,255,0); }
      100% { box-shadow: 0 0 0 0 rgba(0,212,255,0), 0 0 0 0 rgba(0,212,255,0); }
    }
    @keyframes float {
      0%, 100% { transform: translateY(0); }
      50% { transform: translateY(-8px); }
    }

    /* ============================================================
       RESPONSIVE — MOBILE
    ============================================================ */
    @media (max-width: 768px) {
      .navbar-inner { height: 58px; }
      .nav-links { display: none; }
      .nav-actions { display: none; }

      .hero { padding: 100px 20px 60px; min-height: 100svh; }
      .hero-cta { flex-direction: column; align-items: center; width: 100%; }
      .hero-cta .btn { width: 100%; max-width: 320px; justify-content: center; }
      .hero-rings { width: 320px; height: 320px; }

      .section { padding: 72px 0; }

      .scenarios-inner { grid-template-columns: 1fr; gap: 40px; }
      .scenario-visual { height: 260px; }
      .map-label.l2 { right: 6%; }
      .map-label.l3 { left: 6%; }
      .map-label.l4 { bottom: 12%; right: 6%; }
      .map-label.l5 { top: 42%; left: 5%; }

      .contact-grid { grid-template-columns: 1fr; gap: 12px; }

      .scroll-hint { display: none; }

      .modal { padding: 36px 24px; }
      .qr-image { width: 160px; height: 160px; }
    }

    @media (max-width: 480px) {
      .hero-title-product { letter-spacing: 4px; font-size: 0.5em; }
      .features-grid { grid-template-columns: 1fr; }
      .scenario-item { padding: 18px; }
    }

    /* ============================================================
       APP 展示
    ============================================================ */
    .apps {
      background: var(--bg2);
      position: relative;
      overflow: hidden;
    }
    .showcase-grid-bg {
      position: absolute;
      inset: 0;
      background:
        linear-gradient(to bottom, rgba(0,15,35,0.97), rgba(0,10,25,0.99)),
        repeating-linear-gradient(0deg, transparent, transparent 49px, rgba(0,212,255,0.03) 50px),
        repeating-linear-gradient(90deg, transparent, transparent 49px, rgba(0,212,255,0.03) 50px);
      pointer-events: none;
    }
    .showcase-grid-bg::before {
      content: '';
      position: absolute;
      top: -200px;
      left: -200px;
      width: 600px;
      height: 600px;
      background: radial-gradient(ellipse at center, rgba(0,212,255,0.06) 0%, transparent 70%);
      pointer-events: none;
    }
    .showcase-grid-bg::after {
      content: '';
      position: absolute;
      bottom: -200px;
      right: -200px;
      width: 600px;
      height: 600px;
      background: radial-gradient(ellipse at center, rgba(0,100,200,0.05) 0%, transparent 70%);
      pointer-events: none;
    }
    .showcase-header {
      text-align: center;
      margin-bottom: 48px;
      position: relative;
      z-index: 1;
    }
    .showcase-header h2 {
      font-family: var(--font-display);
      font-size: clamp(28px, 4vw, 42px);
      font-weight: 700;
      color: #fff;
      margin: 8px 0 12px;
      letter-spacing: 2px;
    }
    .showcase-header p {
      font-size: 16px;
      color: rgba(255,255,255,0.55);
      letter-spacing: 1px;
    }
    .role-tab-group {
      display: flex;
      justify-content: center;
      gap: 12px;
      margin-bottom: 40px;
      position: relative;
      z-index: 1;
    }
    .role-tab {
      display: flex;
      align-items: center;
      gap: 8px;
      padding: 10px 24px;
      background: rgba(0,20,50,0.6);
      border: 1px solid rgba(0,212,255,0.2);
      border-radius: 40px;
      color: rgba(255,255,255,0.6);
      font-size: 14px;
      font-weight: 500;
      cursor: pointer;
      transition: all 0.3s;
      position: relative;
      overflow: hidden;
    }
    .role-tab svg {
      width: 18px;
      height: 18px;
      fill: currentColor;
    }
    .role-tab::after {
      content: '';
      position: absolute;
      bottom: -1px;
      left: 50%;
      transform: translateX(-50%) scaleX(0);
      width: 60%;
      height: 2px;
      background: linear-gradient(90deg, transparent, #00d4ff, transparent);
      border-radius: 2px;
      transition: transform 0.3s;
    }
    .role-tab.active {
      background: rgba(0,212,255,0.12);
      border-color: rgba(0,212,255,0.5);
      color: #fff;
      box-shadow: 0 0 20px rgba(0,212,255,0.15);
    }
    .role-tab.active::after {
      transform: translateX(-50%) scaleX(1);
    }
    .role-tab:hover:not(.active) {
      border-color: rgba(0,212,255,0.35);
      color: rgba(255,255,255,0.85);
    }
    .showcase-main {
      display: flex;
      flex-direction: row;
      align-items: center;
      justify-content: center;
      gap: 48px;
      position: relative;
      z-index: 1;
    }
    .device-display {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 16px;
    }
    .device-hologram {
      position: relative;
      display: inline-flex;
      align-items: center;
      justify-content: center;
    }
    .hologram-glow {
      position: absolute;
      inset: -30px;
      background: radial-gradient(ellipse at center, rgba(0,212,255,0.18) 0%, rgba(0,80,160,0.08) 40%, transparent 70%);
      pointer-events: none;
      border-radius: 50px;
      animation: hologramPulse 4s ease-in-out infinite;
    }
    @keyframes hologramPulse {
      0%, 100% { opacity: 1; transform: scale(1); }
      50% { opacity: 0.7; transform: scale(1.03); }
    }
    .phone-bezel {
      position: relative;
      background: rgba(10,22,48,0.88);
      backdrop-filter: blur(24px);
      border: 1px solid rgba(0,212,255,0.22);
      border-radius: 36px;
      padding: 12px;
      box-shadow:
        0 0 0 1px rgba(0,212,255,0.08),
        0 25px 60px rgba(0,0,0,0.55),
        inset 0 1px 0 rgba(255,255,255,0.04),
        inset 0 0 30px rgba(0,50,100,0.1);
      transition: transform 0.4s, box-shadow 0.4s;
      z-index: 1;
    }
    .phone-bezel:hover {
      transform: scale(1.03);
      box-shadow:
        0 0 0 1px rgba(0,212,255,0.15),
        0 30px 80px rgba(0,0,0,0.6),
        0 0 40px rgba(0,212,255,0.12),
        inset 0 1px 0 rgba(255,255,255,0.06),
        inset 0 0 40px rgba(0,80,140,0.15);
    }
    .phone-notch {
      display: none; /* 全面屏，不显示刘海 */
    }
    .main-screenshot {
      display: block;
      width: 220px;
      height: 440px;
      object-fit: contain;
      border-radius: 26px;
      transition: opacity 0.35s;
      background: rgba(0,0,0,0.3);
      /* 阻止父元素的backdrop-filter模糊效果传递到图片 */
      backdrop-filter: none;
      -webkit-backdrop-filter: none;
    }
    .main-screenshot.fade-out {
      opacity: 0;
    }
    .hologram-edge-glow {
      position: absolute;
      inset: -2px;
      border-radius: 38px;
      background: transparent;
      border: 1px solid rgba(0,212,255,0.15);
      pointer-events: none;
      z-index: 0;
    }
    .device-info {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 4px;
    }
    .device-info-label {
      font-size: 11px;
      letter-spacing: 2px;
      text-transform: uppercase;
      color: rgba(0,212,255,0.5);
    }
    .device-info-name {
      font-family: var(--font-display);
      font-size: 16px;
      font-weight: 600;
      color: #fff;
      letter-spacing: 1px;
    }
    .thumb-nav {
      width: auto;
      max-width: 280px;
      padding: 12px 8px 12px 4px;
    }
    .thumb-group {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 12px;
      flex-wrap: nowrap;
      overflow-y: auto;
      max-height: 500px;
      padding-right: 4px;
      scrollbar-width: thin;
      scrollbar-color: rgba(0,212,255,0.25) rgba(0,212,255,0.05);
    }
    .thumb-group::-webkit-scrollbar {
      width: 6px;
    }
    .thumb-group::-webkit-scrollbar-track {
      background: rgba(0,212,255,0.05);
      border-radius: 3px;
    }
    .thumb-group::-webkit-scrollbar-thumb {
      background: rgba(0,212,255,0.25);
      border-radius: 3px;
      transition: background 0.3s;
    }
    .thumb-group::-webkit-scrollbar-thumb:hover {
      background: rgba(0,212,255,0.45);
    }
    .thumb-group.hidden {
      display: none;
    }
    .thumb {
      display: flex;
      flex-direction: column;
      align-items: center;
      gap: 8px;
      background: none;
      border: none;
      cursor: pointer;
      padding: 0;
    }
    .thumb-frame {
      position: relative;
      width: 85px;
      height: 170px;
      border-radius: 16px;
      overflow: hidden;
      border: 1.5px solid rgba(0,212,255,0.15);
      transition: border-color 0.3s, transform 0.3s, box-shadow 0.3s;
    }
    .thumb-frame img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      /* 锐化处理 */
      image-rendering: -webkit-optimize-contrast;
      image-rendering: crisp-edges;
      /* 阻止父元素的backdrop-filter模糊效果传递到图片 */
      backdrop-filter: none;
      -webkit-backdrop-filter: none;
    }
    .thumb-overlay {
      position: absolute;
      inset: 0;
      background: rgba(0,212,255,0);
      transition: background 0.3s;
    }
    .thumb:hover .thumb-frame {
      border-color: rgba(0,212,255,0.5);
      transform: translateY(-3px);
      box-shadow: 0 8px 24px rgba(0,0,0,0.4), 0 0 16px rgba(0,212,255,0.1);
    }
    .thumb:hover .thumb-overlay {
      background: rgba(0,212,255,0.08);
    }
    .thumb.active .thumb-frame {
      border-color: rgba(0,212,255,0.7);
      box-shadow: 0 0 20px rgba(0,212,255,0.2);
    }
    .thumb-label {
      font-size: 12px;
      color: rgba(255,255,255,0.5);
      letter-spacing: 1px;
      transition: color 0.3s;
    }
    .thumb.active .thumb-label,
    .thumb:hover .thumb-label {
      color: rgba(0,212,255,0.8);
    }
    .capability-tags {
      display: flex;
      justify-content: center;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 48px;
      position: relative;
      z-index: 1;
    }
    .cap-tag {
      padding: 8px 18px;
      background: rgba(0,20,50,0.5);
      border: 1px solid rgba(0,212,255,0.18);
      border-radius: 30px;
      font-size: 13px;
      color: rgba(255,255,255,0.65);
      letter-spacing: 1px;
      backdrop-filter: blur(8px);
      transition: all 0.3s;
    }
    .cap-tag:hover {
      background: rgba(0,212,255,0.1);
      border-color: rgba(0,212,255,0.4);
      color: #fff;
      box-shadow: 0 0 16px rgba(0,212,255,0.12);
    }
    @media (max-width: 768px) {
      .showcase-main {
        flex-direction: column;
        gap: 24px;
      }
      .thumb-nav {
        max-width: 100%;
      }
      .thumb-group {
        flex-direction: row;
        overflow-x: auto;
        max-height: none;
        padding-right: 0;
        padding-bottom: 4px;
        scrollbar-width: thin;
        scrollbar-color: rgba(0,212,255,0.25) rgba(0,212,255,0.05);
      }
      .thumb-group::-webkit-scrollbar {
        height: 6px;
      }
      .thumb-group::-webkit-scrollbar-track {
        background: rgba(0,212,255,0.05);
        border-radius: 3px;
      }
      .thumb-group::-webkit-scrollbar-thumb {
        background: rgba(0,212,255,0.25);
        border-radius: 3px;
        transition: background 0.3s;
      }
      .thumb-group::-webkit-scrollbar-thumb:hover {
        background: rgba(0,212,255,0.45);
      }
      .role-tab-group {
        flex-direction: row;
        gap: 8px;
      }
      .role-tab {
        padding: 8px 16px;
        font-size: 13px;
      }
      .role-tab svg {
        width: 16px;
        height: 16px;
      }
      .main-screenshot {
        width: 180px;
        height: 360px;
      }
      .thumb-group {
        gap: 10px;
      }
      .thumb-frame {
        width: 80px;
        height: 160px;
      }
      .showcase-header {
        margin-bottom: 32px;
      }
      .capability-tags {
        gap: 8px;
        margin-top: 36px;
      }
      .cap-tag {
        padding: 6px 14px;
        font-size: 12px;
      }
    }

    /* ============================================================
       CLIENTS — Tech Plaque Style (cyan accent)
    ============================================================ */
    .clients {
      background: var(--bg2);
      position: relative;
      overflow: hidden;
    }
    .clients-glow {
      position: absolute;
      top: -80px; left: 50%;
      transform: translateX(-50%);
      width: 900px; height: 450px;
      background: radial-gradient(ellipse at center,
        rgba(0, 212, 255, 0.06) 0%,
        rgba(0, 145, 255, 0.03) 40%,
        transparent 70%);
      pointer-events: none;
    }
    .clients-texture {
      position: absolute; inset: 0;
      background-image:
        linear-gradient(rgba(0, 212, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 212, 255, 0.03) 1px, transparent 1px);
      background-size: 40px 40px;
      pointer-events: none;
    }
    .clients-header {
      text-align: center;
      margin-bottom: 56px;
      position: relative;
      z-index: 1;
    }
    .clients-eyebrow {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      margin-bottom: 20px;
    }
    .clients-eyebrow .eyebrow-text {
      font-family: var(--font-display);
      font-size: 11px;
      font-weight: 700;
      letter-spacing: 6px;
      color: var(--accent);
      opacity: 0.7;
      text-transform: uppercase;
    }
    .clients-eyebrow .eyebrow-rule {
      width: 60px; height: 1px;
      background: linear-gradient(90deg, transparent, var(--accent), transparent);
      opacity: 0.4;
    }
    .clients-title {
      font-family: var(--font-display);
      font-size: clamp(30px, 4vw, 48px);
      font-weight: 700;
      color: #fff;
      letter-spacing: 4px;
      margin-bottom: 14px;
    }
    .clients-desc {
      font-size: 14px;
      color: var(--text-muted);
      letter-spacing: 1px;
    }
    .clients-body {
      display: flex;
      flex-direction: column;
      gap: 48px;
      position: relative;
      z-index: 1;
    }

    /* Block wrapper */
    .client-block {
      display: flex;
      flex-direction: column;
      gap: 14px;
    }
    .client-block-label {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      font-family: var(--font-display);
      font-size: 12px;
      font-weight: 700;
      letter-spacing: 3px;
      text-transform: uppercase;
      color: var(--accent);
      padding: 0 4px;
    }
    .label-icon {
      width: 16px; height: 16px;
      fill: var(--accent);
      flex-shrink: 0;
    }

    /* Rows of plaques */
    .client-row {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 14px;
    }
    .client-row--enterprise {
      grid-template-columns: repeat(5, 1fr);
    }

    /* Individual plaque */
    .client-plaque {
      position: relative;
      background: linear-gradient(
        145deg,
        rgba(15, 30, 54, 0.95),
        rgba(10, 22, 40, 0.9)
      );
      border: 1px solid var(--border);
      border-radius: var(--radius);
      padding: 18px 20px 16px;
      display: flex;
      flex-direction: column;
      gap: 6px;
      cursor: default;
      transition:
        border-color 0.35s,
        transform 0.35s,
        box-shadow 0.35s;
      box-shadow:
        0 2px 0 rgba(0, 212, 255, 0.06) inset,
        0 8px 32px rgba(0, 0, 0, 0.4);
      overflow: hidden;
    }
    /* top shimmer line */
    .client-plaque::before {
      content: '';
      position: absolute;
      top: 0; left: 0; right: 0;
      height: 2px;
      background: linear-gradient(
        90deg,
        transparent 0%,
        rgba(0, 212, 255, 0.5) 30%,
        rgba(0, 212, 255, 0.85) 50%,
        rgba(0, 212, 255, 0.5) 70%,
        transparent 100%
      );
      opacity: 0;
      transition: opacity 0.35s;
    }
    /* side accent bar */
    .client-plaque::after {
      content: '';
      position: absolute;
      top: 12px; bottom: 12px; left: 0;
      width: 3px;
      background: linear-gradient(
        180deg,
        rgba(0, 212, 255, 0.9) 0%,
        rgba(0, 145, 255, 0.5) 100%
      );
      border-radius: 0 3px 3px 0;
    }
    .client-plaque:hover {
      border-color: var(--border2);
      transform: translateY(-4px) translateZ(0);
      box-shadow:
        0 4px 0 rgba(0, 212, 255, 0.12) inset,
        0 16px 48px rgba(0, 0, 0, 0.5),
        0 0 24px var(--accent-glow);
    }
    .client-plaque:hover::before {
      opacity: 1;
    }

    /* number badge */
    .plaque-num {
      font-family: var(--font-display);
      font-size: 10px;
      font-weight: 700;
      letter-spacing: 2px;
      color: rgba(0, 212, 255, 0.4);
    }
    .plaque-name {
      font-size: 13px;
      font-weight: 500;
      color: var(--text);
      line-height: 1.45;
      letter-spacing: 0.3px;
    }

    /* Enterprise plaque */
    .client-plaque--ent {
      padding: 18px 18px 16px;
    }

    @media (max-width: 1000px) {
      .client-row { grid-template-columns: repeat(2, 1fr); }
      .client-row--enterprise { grid-template-columns: repeat(3, 1fr); }
    }
    @media (max-width: 640px) {
      .clients-title { letter-spacing: 2px; }
      .client-row { grid-template-columns: 1fr; }
      .client-row--enterprise { grid-template-columns: repeat(2, 1fr); }
      .plaque-name { font-size: 12px; }
    }
      font-family: var(--font-display);
      font-size: 10px;
      font-weight: 700;
      letter-spacing: 2px;
      color: rgba(212, 160, 60, 0.45);
    }
    .plaque-name {
      font-size: 13px;
      font-weight: 500;
      color: #e8ecf4;
      line-height: 1.45;
      letter-spacing: 0.3px;
    }

    /* Enterprise plaque — slightly wider padding, same style */
    .client-plaque--ent {
      padding: 18px 18px 16px;
    }

    @media (max-width: 1000px) {
      .client-row { grid-template-columns: repeat(2, 1fr); }
      .client-row--enterprise { grid-template-columns: repeat(3, 1fr); }
    }
    @media (max-width: 640px) {
      .clients-title { letter-spacing: 2px; }
      .client-row { grid-template-columns: 1fr; }
      .client-row--enterprise { grid-template-columns: repeat(2, 1fr); }
      .plaque-name { font-size: 12px; }
    }