:root {
    --y: #FFD000;
    --o: #FF6200;
    --r: #E8001D;
    --dark: #08090D;
    --dark2: #101318;
    --dark3: #181D27;
    --panel: #1E2433;
    --border: rgba(255,255,255,0.07);
    --text: #E8EBF4;
    --dim: #aaa;
    --teal: #00CFC0;
    --blue: #1A5FFF;
  }

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

  body {
    font-family: 'Noto Sans TC', sans-serif;
    background: var(--dark);
    color: var(--text);
    overflow-x: hidden;
    cursor: default;
  }

  /* ─── BACK TO TOP ─── */
  #backToTop {
    position: fixed; bottom: 32px; right: 32px; z-index: 99999;
    width: 44px; height: 44px; border-radius: 50%;
    background: var(--y); color: var(--dark); border: none; cursor: pointer;
    font-size: 20px; font-weight: 700;
    display: flex; align-items: center; justify-content: center;
    opacity: 0; visibility: hidden;
    transition: opacity 0.3s, visibility 0.3s, transform 0.2s;
    box-shadow: 0 4px 16px rgba(255,208,0,0.3);
  }
  #backToTop.show { opacity: 1; visibility: visible; }
  #backToTop:hover { transform: translateY(-3px); box-shadow: 0 6px 24px rgba(255,208,0,0.4); }

  /* ─── SCROLLBAR ─── */
  ::-webkit-scrollbar { width: 4px; }
  ::-webkit-scrollbar-track { background: transparent; }
  ::-webkit-scrollbar-thumb { background: transparent; border-radius: 2px; }

  /* ─── NAV ─── */
  nav {
    position: fixed; top:0; left:0; right:0; z-index:99999;
    height: 64px;
    display: flex; align-items: center; justify-content: center;
    padding: 0 40px;
    background: rgba(255,255,255,0.97);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0,0,0,0.08);
  }
  nav > * { flex-shrink: 0; }
  .nav-inner {
    display: flex; align-items: center; justify-content: space-between;
    width: 100%; max-width: 1200px;
  }
  .nav-logo {
    display: flex; align-items: center; gap: 12px;
  }
  .nav-badge {
    background: var(--r); color: #fff;
    font-size: 11px; font-weight: 700; padding: 3px 10px;
    border-radius: 20px; letter-spacing: 1px;
    animation: pulse-badge 2s ease-in-out infinite;
  }
  @keyframes pulse-badge {
    0%,100% { box-shadow: 0 0 0 0 rgba(232,0,29,0.4); }
    50% { box-shadow: 0 0 0 8px rgba(232,0,29,0); }
  }
  .nav-links { display: flex; align-items: center; gap: 28px; }
  .nav-links a {
    color: #444; font-size: 14px; font-weight: 500;
    text-decoration: none; letter-spacing: 0.5px;
    transition: color 0.2s; position: relative;
  }
  .nav-links a:hover { color: #3399FF; }
  .nav-links a::after {
    content: ''; position: absolute; bottom: -4px; left: 0; width: 0; height: 2px;
    background: #3399FF; transition: width 0.2s;
  }
  .nav-links a:hover::after { width: 100%; }
  .nav-right { display: flex; align-items: center; gap: 20px; }
  .nav-cta {
    background: #3399FF; color: #fff;
    border: none; cursor: pointer;
    padding: 10px 26px; font-weight: 700; font-size: 14px;
    font-family: 'Noto Sans TC', sans-serif; letter-spacing: 1px;
    transition: all 0.2s; border-radius: 6px;
    text-decoration: none; display: inline-block;
  }
  .nav-cta:hover { background: #2277DD; transform: translateY(-1px); box-shadow: 0 6px 24px rgba(51,153,255,0.3); }

  /* ─── HERO ─── */
  .hero {
    min-height: 100vh;
    display: flex; flex-direction: column; justify-content: center;
    position: relative; overflow: hidden;
    padding: 100px 40px 80px;
  }
  .hero-bg {
    position: absolute; inset: 0;
    background:
      radial-gradient(ellipse 900px 600px at 70% 40%, rgba(255,98,0,0.15) 0%, transparent 70%),
      radial-gradient(ellipse 600px 500px at 10% 80%, rgba(26,95,255,0.1) 0%, transparent 60%),
      linear-gradient(170deg, rgba(8,9,13,0.75) 0%, rgba(14,17,24,0.7) 60%, rgba(8,9,13,0.9) 100%),
      url('images/construction-site-safety-management-hero-bg.webp');
    background-position: top center;
    background-repeat: no-repeat;
  }
  .hero-grid {
    position: absolute; inset: 0;
    background-image: linear-gradient(rgba(255,208,0,0.03) 1px, transparent 1px),
                      linear-gradient(90deg, rgba(255,208,0,0.03) 1px, transparent 1px);
    background-size: 70px 70px;
    mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
  }
  /* scanning line */
  .hero-scan {
    position: absolute; left: 0; right: 0; height: 2px; z-index: 3;
    background: linear-gradient(90deg, transparent, rgba(255,208,0,0.6), transparent);
    animation: scan 9s linear infinite;
    pointer-events: none;
  }
  @keyframes scan { 0% { top: 0; } 50% { top: 100%; } 100% { top: 0; } }

  .hero-inner {
    position: relative; z-index: 10000;
    max-width: 1200px; margin: 0 auto; width: 100%;
    display: grid; grid-template-columns: 1fr 500px; gap: 64px; align-items: center;
  }

  /* left */
  .hero-eyebrow {
    display: inline-flex; align-items: center; gap: 8px; margin-bottom: 24px;
    background: rgba(232,0,29,0.1); border: 1px solid rgba(232,0,29,0.3);
    padding: 6px 16px; border-radius: 4px;
    font-size: 12px; font-weight: 700; letter-spacing: 2px; color: #FF4D5E;
    text-transform: uppercase;
  }
  .hero-eyebrow::before {
    content: ''; width: 0; height: 0;
    border-top: 5px solid transparent;
    border-bottom: 5px solid transparent;
    border-left: 8px solid var(--r);
    animation: arrow-blink 1s ease-in-out infinite;
  }
  @keyframes arrow-blink { 0%,100%{opacity:1; transform:translateX(0)} 50%{opacity:0.3; transform:translateX(3px)} }
  @keyframes blink { 0%,100%{opacity:1} 50%{opacity:0.2} }

  .hero h1 {
    font-family: 'Bebas Neue', sans-serif;
    font-size: clamp(52px, 7vw, 88px);
    line-height: 1.1;
    letter-spacing: 2px;
    color: #fff;
    margin-bottom: 8px;
  }
  .hero h1 .accent { color: var(--y); display: block; }
  .hero h1 .sub-line {
    font-family: 'Noto Sans TC'; font-weight: 700;
    font-size: clamp(22px, 3vw, 36px);
    color: var(--y);
    display: block;
  }
  .hero-desc {
    margin: 28px 0 36px;
    font-size: 16px; line-height: 1.5; color: rgba(255,255,255,0.75);
    max-width: 560px; font-weight: 300; letter-spacing: .5px;
  }
  .hero-desc strong { color: #fff; }
  .hero-btns { display: flex; gap: 16px; flex-wrap: wrap; }
  .btn-primary {
    background: var(--y); color: var(--dark);
    padding: 16px 36px; font-weight: 900; font-size: 16px; letter-spacing: 1px;
    border: none; cursor: pointer; font-family: 'Noto Sans TC';
    border-radius: 4px;
    transition: all 0.25s; text-decoration: none; display: inline-block;
  }
  .btn-primary:hover { background: #fff; transform: translateY(-2px); box-shadow: 0 12px 40px rgba(255,208,0,0.25); }
  .btn-ghost {
    border: 1px solid rgba(255,255,255,0.2); color: #fff;
    padding: 15px 32px; font-weight: 500; font-size: 15px;
    background: transparent; cursor: pointer; font-family: 'Noto Sans TC';
    transition: all 0.25s; text-decoration: none; display: inline-block;
    border-radius: 2px;
  }
  .btn-ghost:hover { border-color: var(--y); color: var(--y); }

  .hero-stats { display: flex; gap: 36px; margin-top: 48px; }
  .stat { }
  .stat-num {
    font-family: 'Bebas Neue'; font-size: 48px; color: var(--y); line-height: 1;
    display: block;
  }
  .stat-num sup { font-size: 24px; }
  .stat-label { font-size: 12px; color: var(--text); letter-spacing: 1px; margin-top: 4px; }

  /* right – mock screen */
  .hero-screen {
    position: relative; z-index: 10000;
    background: var(--dark3);
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 0 60px rgba(255,208,0,0.2), 0 20px 60px rgba(0,0,0,0.2), 0 0 100px rgba(255,208,0,0.2);
  }
  .screen-bar {
    background: var(--panel); padding: 10px 16px;
    display: flex; align-items: center; gap: 8px;
    border-bottom: 1px solid var(--border);
    font-size: 11px; color: var(--dim); font-family: 'JetBrains Mono';
  }
  .screen-dot { width: 10px; height: 10px; border-radius: 50%; }
  .screen-body { padding: 20px; }
  .cam-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; }
  .cam-feed {
    position: relative; background: #060810; border-radius: 4px;
    aspect-ratio: 4/3; overflow: hidden;
    border: 1px solid rgba(255,255,255,0.05);
  }
  .cam-feed-overlay {
    position: absolute; inset: 0;
    background: linear-gradient(135deg, rgba(0,207,192,0.03), rgba(26,95,255,0.03));
  }
  /* animated detection box */
  .detect-box {
    position: absolute; border: 2px solid;
    border-radius: 2px; padding: 2px 5px;
    font-family: 'JetBrains Mono'; font-size: 9px; font-weight: 700;
  }
  @keyframes detect-pulse { 0%,100%{opacity:1} 50%{opacity:0.5} }
  .cam-label {
    position: absolute; bottom: 0; left: 0; right: 0;
    background: rgba(0,0,0,0.7); padding: 6px 10px;
    font-family: 'JetBrains Mono'; font-size: 10px; color: var(--dim);
    display: flex; justify-content: space-between;
  }
  .cam-live { color: var(--r); font-weight: 700; }
  .cam-placeholder {
    position: absolute; inset: 0; display: flex; flex-direction:column;
    align-items: center; justify-content: center; gap: 6px;
    opacity: 0.15;
  }
  .cam-placeholder svg { width: 36px; height: 36px; }

  /* worker icons drawn with CSS */
  .worker-scene { position: absolute; inset: 0; overflow: hidden; }
  .worker { position: absolute; bottom: 24px; }
  .w1 { left: 18%; }
  .w2 { left: 50%; }
  .w3 { right: 10%; }
  .worker-body {
    width: 16px; height: 28px;
    background: #3a4050; border-radius: 3px;
    position: relative;
    margin: 0 auto;
  }
  .worker-head {
    width: 14px; height: 14px; border-radius: 50%;
    background: #9a8060; margin: 0 auto;
    position: relative;
  }
  .helmet {
    width: 16px; height: 9px; border-radius: 8px 8px 0 0;
    margin: 0 auto;
  }
  .helmet-y { background: var(--y); }
  .helmet-none { background: #9a8060; border: 2px dashed var(--r); width: 14px; height: 14px; border-radius: 50%; }

  .alert-bar {
    background: rgba(232,0,29,0.1); border: 1px solid rgba(232,0,29,0.25);
    border-radius: 4px; padding: 8px 12px; margin-top: 10px;
    display: flex; align-items: center; gap: 8px;
    font-size: 11px; color: #FF6677; font-family: 'JetBrains Mono';
    animation: alert-flash 1.5s ease-in-out infinite;
  }
  @keyframes alert-flash { 0%,100%{background:rgba(232,0,29,0.1)} 50%{background:rgba(232,0,29,0.18)} }
  .alert-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--r); flex-shrink: 0; }

  .metric-row { display: flex; gap: 8px; margin-top: 10px; }
  .metric-card {
    flex: 1; background: var(--dark2); border: 1px solid var(--border);
    border-radius: 4px; padding: 10px;
  }
  .metric-val {
    font-family: 'Bebas Neue'; font-size: 28px;
    display: flex; align-items: baseline; gap: 4px;
  }
  .metric-val span { font-size: 12px; font-family: 'Noto Sans TC'; color: var(--dim); font-weight: 400; }
  .metric-val.ok { color: var(--teal); }
  .metric-val.warn { color: var(--r); }
  .metric-label { font-size: 10px; color: var(--dim); margin-top: 2px; }

  /* ─── SECTION BASE ─── */
  section { padding: 100px 40px; }
  .section-inner { max-width: 1200px; margin: 0 auto; text-align: center; }
  .tag {
    display: inline-block; background: rgba(255,208,0,0.1);
    border: 1px solid rgba(255,208,0,0.25); color: var(--y);
    font-size: 11px; font-weight: 700; letter-spacing: 3px; text-transform: uppercase;
    padding: 5px 14px; border-radius: 2px; margin-bottom: 30px;
  }
  h2 {
    font-family: 'Bebas Neue'; font-size: clamp(36px, 5vw, 60px);
    letter-spacing: .5px; line-height: 1.25; color: #fff; margin-bottom: 16px;
  }
  h2 .y { color: var(--y); }
  .lead { font-size: 17px; color: rgba(255,255,255,0.8); line-height: 1.8; max-width: 620px; font-weight: 300; letter-spacing: .5px; margin: 0 auto; text-align: center; }

  /* ─── ALERT SECTION ─── */
  .alert-section {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    border-top: 1px solid rgba(255,152,0,0.15);
    border-bottom: 1px solid rgba(255,152,0,0.15);
    padding: 72px 40px;
    overflow: hidden;
  }
  .alert-section::before {
    content: '';
    position: absolute; inset: 0;
    background: url('images/occupational-safety-law-compliance-bg.webp') center / cover no-repeat fixed;
    opacity: 0.2;
    z-index: 0;
  }
  .alert-section::after {
    content: '';
    position: absolute; inset: 0;
    background: linear-gradient(135deg, rgba(8,9,13,0.9) 0%, rgba(20,14,5,0.05) 50%, rgba(8,9,13,0.1) 100%)
    z-index: 1;
  }
  .alert-section > * {
    position: relative;
    z-index: 2;
  }
  .alert-box {
    background: rgba(255,152,0,0.06); border: 1px solid rgba(255,152,0,0.2);
    border-radius: 8px; padding: 36px 40px;
    max-width: 1000px; margin: 40px auto 0;
    position: relative; overflow: hidden;
  }
  /*
  .alert-box::before {
    content: '⚠'; position: absolute; right: 30px; top: 20px;
    font-size: 100px; opacity: 0.04; line-height: 1;
  }
  */
  .alert-box h3 {
    font-family: 'Noto Sans TC'; font-size: 36px; letter-spacing: 2px;
    color: var(--o); margin-bottom: 20px; text-align: center;
    background: rgba(255,98,0,0.1); border: 1px solid rgba(255,98,0,0.3);
    border-radius: 6px; padding: 16px 24px;
  }
  .law-items { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
  .law-item {
    background: rgba(0,0,0,0.3); border-radius: 6px; padding: 20px;
    border: 1px solid rgba(255,208,0,0.5);
  }
  .law-item h4 { font-size: 14px; font-weight: 300; color: var(--y); margin-bottom: 8px; letter-spacing: .75px; }
  .law-item p { font-size: 14px; color: #aaa; line-height: 1.5; letter-spacing: .25px; }
  .law-item .fine {
    font-family: 'Bebas Neue'; font-size: 36px; color: var(--text); margin: 12px 0 4px;
    display: block; font-weight: 700;
    text-shadow: 0 2px 10px rgba(255,98,0,0.4), 0 4px 20px rgba(255,98,0,0.2);
  }

  /* ─── HOW IT WORKS ─── */
  #how {
    position: relative;
    overflow: hidden;
  }
  #how::before {
    content: '';
    position: absolute; inset: 0;
    background: url('images/occupational-safety-law-compliance-bg.webp') center / cover no-repeat fixed;
    opacity: 0.2;
    z-index: 0;
  }
  #how::after {
    content: '';
    position: absolute; inset: 0;
    background: linear-gradient(135deg, rgba(8,9,13,0.9) 0%, rgba(20,14,5,0.05) 50%, rgba(8,9,13,0.1) 100%);
    z-index: 1;
  }
  #how > * {
    position: relative;
    z-index: 2;
  }
  .how-grid {
    display: grid; grid-template-columns: repeat(4, 1fr); gap: 2px;
    margin-top: 56px;
  }
  .how-step {
    background: rgba(24,29,39,0.4); padding: 36px 28px;
    position: relative; overflow: hidden;
    transition: background 0.3s;
  }
  .how-step:hover { background: rgba(30,36,51,0.9); }
  .how-step::after {
    content: ''; position: absolute; bottom: 0; left: 0; width: 100%; height: 3px;
    background: var(--y); transform: scaleX(0); transform-origin: left;
    transition: transform 0.3s;
  }
  .how-step:hover::after { transform: scaleX(1); }
  .step-num {
    font-family: 'Bebas Neue'; font-size: 72px; color: rgba(120,120,120,0.5);
    line-height: 1; margin-bottom: 16px;
  }
  .step-icon { font-size: 36px; margin-bottom: 16px; display: block; }
  .how-step h4 { font-size: 16px; font-weight: 700; color: #fff; margin-bottom: 10px; }
  .how-step p { font-size: 14px; color: var(--dim); line-height: 1.7; }

  /* ─── FEATURES ─── */
  .features-section {
    background: var(--dark2);
    position: relative;
    overflow: hidden;
  }
  .features-section::before {
    content: '';
    position: absolute; inset: 0;
    background: url('images/ai-ppe-detection-features-bg.webp') center / cover no-repeat fixed;
    opacity: 0.45;
    z-index: 0;
  }
  .features-section::after {
    content: '';
    position: absolute; inset: 0;
    background: linear-gradient(135deg, rgba(16,19,24,0.7) 0%, rgba(16,19,24,0.6) 100%);
    z-index: 1;
  }
  .features-section > * {
    position: relative;
    z-index: 2;
  }
  .features-grid {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px;
    margin-top: 56px; background: var(--border);
  }
  .feat {
    background: rgba(16,19,24,0.4); padding: 40px 32px;
    transition: background 0.3s;
  }
  .feat:hover { background: rgba(24,29,39,0.9); }
  .feat-icon {
    width: 52px; height: 52px; border-radius: 8px;
    display: flex; align-items: center; justify-content: center;
    font-size: 24px; margin: 0 auto 20px;
    background: rgba(255,208,0,0.08); border: 1px solid rgba(255,208,0,0.15);
  }
  .feat h4 { font-size: 17px; font-weight: 700; color: #fff; margin-bottom: 10px; }
  .feat p { font-size: 14px; color: var(--dim); line-height: 1.8; }
  .feat-tag {
    display: inline-block; margin-top: 14px;
    background: rgba(255,208,0,0.1); border: 1px solid rgba(255,208,0,0.2);
    color: var(--y); font-size: 11px; font-weight: 700; letter-spacing: 1px;
    padding: 3px 10px; border-radius: 20px;
  }

  /* ─── SCENARIO ─── */
  .scenarios-grid {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
    margin-top: 56px;
  }
  .scenario-card {
    background: var(--dark3); border: 1px solid var(--border);
    border-radius: 8px; overflow: hidden;
    transition: all 0.3s; cursor: default;
    opacity: 0; transform: translateX(-60px);
  }
  .scenarios-grid.visible .scenario-card {
    opacity: 1; transform: translateX(0);
  }
  .scenarios-grid.visible .scenario-card:nth-child(1) { transition: all 0.8s cubic-bezier(0.22, 1, 0.36, 1) 0s; }
  .scenarios-grid.visible .scenario-card:nth-child(2) { transition: all 0.8s cubic-bezier(0.22, 1, 0.36, 1) 0.3s; }
  .scenarios-grid.visible .scenario-card:nth-child(3) { transition: all 0.8s cubic-bezier(0.22, 1, 0.36, 1) 0.6s; }
  .scenario-card:hover { border-color: rgba(255,208,0,0.25); transform: translateY(-4px); box-shadow: 0 20px 60px rgba(0,0,0,0.4); }
  .scenario-img {
    height: 180px; background: var(--panel);
    position: relative; overflow: hidden;
    display: flex; align-items: center; justify-content: center;
  }
  .scenario-img img {
    width: 100%; height: 100%; object-fit: cover;
  }
  .scenario-badge {
    position: absolute; top: 12px; right: 12px;
    background: var(--y); color: var(--dark);
    font-size: 11px; font-weight: 900; padding: 3px 10px; border-radius: 2px; letter-spacing: 1px;
  }
  .scenario-body { padding: 24px; }
  .scenario-body h4 { font-size: 17px; font-weight: 700; color: #fff; margin-bottom: 10px; }
  .scenario-body p { font-size: 14px; color: var(--dim); line-height: 1.7; }
  .scenario-tags { display: flex; flex-wrap: wrap; gap: 6px; margin-top: 16px; justify-content: center; }
  .stag {
    background: rgba(255,255,255,0.05); border: 1px solid var(--border);
    color: #7A8299; font-size: 11px; padding: 3px 10px; border-radius: 20px;
  }

  /* ─── COMPARE ─── */
  .compare-section {
    background: var(--dark2);
    position: relative;
    overflow: hidden;
  }
  .compare-section::before {
    content: '';
    position: absolute; inset: 0;
    background: url('images/ai-safety-monitoring-scenarios-bg.webp') center / cover no-repeat fixed;
    opacity: 0.45;
    z-index: 0;
  }
  .compare-section::after {
    content: '';
    position: absolute; inset: 0;
    background: linear-gradient(135deg, rgba(16,19,24,0.7) 0%, rgba(16,19,24,0.6) 100%);
    z-index: 1;
  }
  .compare-section > * {
    position: relative;
    z-index: 2;
  }
  .compare-table {
    width: 100%; border-collapse: collapse;
    margin-top: 56px; overflow: hidden; border-radius: 8px;
  }
  .compare-table thead th {
    padding: 20px 24px; text-align: center; font-size: 13px;
    font-weight: 700; letter-spacing: 2px;
  }
  .compare-table thead th:first-child { color: var(--dim); }
  .compare-table thead .th-old { background: rgba(255,255,255,0.03); color: var(--dim); }
  .compare-table thead .th-new { background: rgba(255,208,0,0.1); color: var(--y); }
  .compare-table tbody tr {
    border-bottom: 1px solid var(--border);
    opacity: 0; transform: translateX(-30px);
  }
  .compare-table.visible tbody tr {
    opacity: 1; transform: translateX(0);
  }
  .compare-table.visible tbody tr:nth-child(1) { transition: all 0.6s cubic-bezier(0.22, 1, 0.36, 1) 0.15s; }
  .compare-table.visible tbody tr:nth-child(2) { transition: all 0.6s cubic-bezier(0.22, 1, 0.36, 1) 0.3s; }
  .compare-table.visible tbody tr:nth-child(3) { transition: all 0.6s cubic-bezier(0.22, 1, 0.36, 1) 0.45s; }
  .compare-table.visible tbody tr:nth-child(4) { transition: all 0.6s cubic-bezier(0.22, 1, 0.36, 1) 0.6s; }
  .compare-table.visible tbody tr:nth-child(5) { transition: all 0.6s cubic-bezier(0.22, 1, 0.36, 1) 0.75s; }
  .compare-table.visible tbody tr:nth-child(6) { transition: all 0.6s cubic-bezier(0.22, 1, 0.36, 1) 0.9s; }
  .compare-table.visible tbody tr:nth-child(7) { transition: all 0.6s cubic-bezier(0.22, 1, 0.36, 1) 1.05s; }
  .compare-table tbody tr:hover td { background: rgba(255,255,255,0.02); }
  .compare-table tbody td {
    padding: 18px 24px; font-size: 14px; vertical-align: top; line-height: 1.6;
  }
  .compare-table tbody td:first-child { color: #fff; font-weight: 500; }
  .compare-table tbody .td-old { color: var(--dim); background: rgba(255,255,255,0.01); transition: transform 0.2s ease; }
  .compare-table tbody .td-new { color: var(--teal); background: rgba(0,207,192,0.03); transition: transform 0.2s ease; }
  .compare-table tbody .td-old:hover,
  .compare-table tbody .td-new:hover { transform: scale(1.15); }
  .compare-table .icon-x { color: var(--r); margin-right: 6px; }
  .compare-table .icon-c { color: var(--teal); margin-right: 6px; }

  /* ─── TESTIMONIAL / CASE ─── */
  .case-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 32px; margin-top: 56px; }
  .case-card {
    background: var(--dark3); border: 1px solid var(--border);
    border-radius: 8px; padding: 36px; position: relative;
    overflow: hidden;
  }
  .case-card::before {
    content: '"'; position: absolute; top: 10px; left: 24px;
    font-family: 'Bebas Neue'; font-size: 120px; color: rgba(255,208,0,0.05); line-height: 1;
  }
  .case-card p { font-size: 15px; color: #9BA5BF; line-height: 1.9; position: relative; text-align: left; }
  .case-meta { margin-top: 24px; display: flex; align-items: center; gap: 14px; }
  .case-avatar {
    width: 44px; height: 44px; border-radius: 50%;
    background: linear-gradient(135deg, var(--y), var(--o));
    display: flex; align-items: center; justify-content: center;
    font-weight: 900; font-size: 16px; color: var(--dark);
  }
  .case-name { font-weight: 700; color: #fff; font-size: 14px; text-align: left; }
  .case-role { font-size: 12px; color: var(--dim); margin-top: 2px; }
  .case-results {
    display: flex; gap: 24px; margin-top: 20px; padding-top: 20px;
    border-top: 1px solid var(--border);
  }
  .case-result-item { text-align: left; }
  .case-result-num { font-family: 'Bebas Neue'; font-size: 32px; color: var(--y); display: block; }
  .case-result-label { font-size: 11px; color: var(--dim); }

  /* ─── LEAD FORM ─── */
  .form-section {
    background: linear-gradient(135deg, #0E1118 0%, #131824 100%);
    border-top: 1px solid rgba(255,208,0,0.1);
  }
  .form-wrapper {
    max-width: 900px; margin: 0 auto;
    border-radius: 12px; padding: 56px;
    position: relative; overflow: hidden;
  }
  .form-wrapper::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
    background: linear-gradient(90deg, var(--y), var(--o), var(--r));
  }
  .form-header { text-align: center; margin-bottom: 40px; }
  .form-header h2 { font-size: 40px; }
  .form-header p { color: var(--dim); font-size: 15px; margin-top: 12px; }
  .form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
  .form-group { display: flex; flex-direction: column; gap: 8px; }
  .form-group.full { grid-column: 1 / -1; }
  .form-group label {
    font-size: 12px; font-weight: 700; letter-spacing: 2px; text-transform: uppercase;
    color: #6B7592;
  }
  .form-group input, .form-group select, .form-group textarea {
    background: var(--dark2); border: 1px solid var(--border);
    color: #fff; padding: 14px 16px; font-size: 14px;
    font-family: 'Noto Sans TC'; border-radius: 4px;
    transition: border-color 0.2s; outline: none; width: 100%;
  }
  .form-group input::placeholder, .form-group textarea::placeholder { color: var(--dim); }
  .form-group input:focus, .form-group select:focus, .form-group textarea:focus {
    border-color: var(--y);
  }
  .form-group select { cursor: pointer; }
  .form-group select option { background: var(--dark2); }
  .form-group textarea { resize: vertical; min-height: 90px; }
  .form-submit {
    width: 100%; margin-top: 24px;
    background: var(--y); color: var(--dark);
    border: none; padding: 18px; font-weight: 900; font-size: 17px;
    font-family: 'Noto Sans TC'; cursor: pointer; letter-spacing: 2px;
    transition: all 0.25s; border-radius: 4px;
  }
  .form-submit:hover { background: #fff; box-shadow: 0 12px 40px rgba(255,208,0,0.25); }
  .form-privacy { text-align: center; font-size: 12px; color: var(--dim); margin-top: 14px; }
  .form-privacy a { color: var(--y); text-decoration: none; }

  /* success */
  .form-success {
    display: none; text-align: center; padding: 20px;
  }
  .form-success .success-icon { font-size: 64px; margin-bottom: 16px; }
  .form-success h3 { font-family: 'Bebas Neue'; font-size: 36px; letter-spacing: 2px; color: var(--teal); }
  .form-success p { color: var(--dim); margin-top: 10px; }

  /* ─── TRUST ─── */
  .trust-section {
    padding: 60px 40px; background: var(--dark);
    min-height: 100vh; display: flex; align-items: center; justify-content: center;
    position: relative; overflow: hidden;
  }
  .trust-section::before {
    content: '';
    position: absolute; inset: 0;
    background: url('images/ai-safety-monitoring-scenarios-bg.webp') center / cover no-repeat fixed;
    opacity: 0.45;
    z-index: 0;
  }
  .trust-section::after {
    content: '';
    position: absolute; inset: 0;
    background: linear-gradient(135deg, rgba(16,19,24,0.7) 0%, rgba(16,19,24,0.6) 100%);
    z-index: 1;
  }
  .trust-section > * {
    position: relative;
    z-index: 2;
  }
  .trust-inner { max-width: 1200px; margin: 0 auto; text-align: center; }
  .trust-title { font-size: 13px; color: var(--dim); letter-spacing: 3px; text-transform: uppercase; margin-bottom: 36px; }
  .trust-logos {
    display: grid; grid-template-columns: repeat(2, 1fr); gap: 48px;
    margin-top: 56px; max-width: 1200px;
  }
  .trust-logo {
    background: var(--dark3); border: 1px solid var(--border);
    border-radius: 20px; overflow: hidden;
    display: flex; flex-direction: column; align-items: center;
    text-align: center;
  }
  .trust-logo img {
    width: 100%; height: 320px; object-fit: cover;
    background: rgba(255,255,255,0.03);
  }
  .trust-logo span {
    padding: 28px 20px;
    font-size: 18px; font-weight: 700; color: var(--text);
    line-height: 1.6; letter-spacing: 0.5px;
  }

  /* ─── FOOTER ─── */
  footer {
    background: #2a2a2a; border-top: 1px solid rgba(255,255,255,0.08);
    padding: 60px 40px 0;
  }
  .footer-inner {
    max-width: 1200px; margin: 0 auto;
    display: grid; grid-template-columns: 1.8fr 1fr 1fr 1fr 1.2fr; gap: 48px;
  }
  .footer-logo {
    font-family: 'Inter', sans-serif; font-size: 32px; letter-spacing: 1px;
    font-weight: 700; color: var(--y); margin-bottom: 16px;
    display: flex; align-items: center; gap: 8px;
  }
  .footer-desc { font-size: 13px; color: #94A3B8; line-height: 1.8; }
  .footer-col h5 {
    font-size: 14px; font-weight: 700; color: #fff;
    margin-bottom: 20px; letter-spacing: 0.5px;
  }
  .footer-col a { display: block; font-size: 13px; color: #94A3B8; text-decoration: none; margin-bottom: 10px; transition: color 0.2s; }
  .footer-col a:hover { color: var(--y); }
  .footer-contact-item { font-size: 13px; color: #94A3B8; margin-bottom: 10px; line-height: 1.6; }
  .footer-bottom {
    max-width: 1200px; margin: 0 auto;
    border-top: 1px solid rgba(255,255,255,0.08);
    margin-top: 48px; padding: 24px 0;
    text-align: center;
  }
  .footer-copy { font-size: 12px; color: #94A3B8; }

  /* ─── ANIM ─── */
  .fade-up { opacity: 0; transform: translateY(60px); transition: all 0.8s cubic-bezier(0.22, 1, 0.36, 1); }
  .fade-up.visible { opacity: 1; transform: translateY(0); }

  .fade-in { opacity: 0; transition: opacity 1s ease; }
  .fade-in.visible { opacity: 1; }

  .slide-left { opacity: 0; transform: translateX(-80px); transition: all 0.8s cubic-bezier(0.22, 1, 0.36, 1); }
  .slide-left.visible { opacity: 1; transform: translateX(0); }

  .slide-right { opacity: 0; transform: translateX(80px); transition: all 0.8s cubic-bezier(0.22, 1, 0.36, 1); }
  .slide-right.visible { opacity: 1; transform: translateX(0); }

  .scale-in { opacity: 0; transform: scale(0.8); transition: all 0.7s cubic-bezier(0.22, 1, 0.36, 1); }
  .scale-in.visible { opacity: 1; transform: scale(1); }

  /* staggered children */
  .stagger-children > * {
    opacity: 0; transform: translateY(40px);
    transition: all 0.7s cubic-bezier(0.22, 1, 0.36, 1);
  }
  .stagger-children.visible > *:nth-child(1) { transition-delay: 0s; }
  .stagger-children.visible > *:nth-child(2) { transition-delay: 0.2s; }
  .stagger-children.visible > *:nth-child(3) { transition-delay: 0.4s; }
  .stagger-children.visible > *:nth-child(4) { transition-delay: 0.6s; }
  .stagger-children.visible > *:nth-child(5) { transition-delay: 0.8s; }
  .stagger-children.visible > *:nth-child(6) { transition-delay: 1s; }
  .stagger-children.visible > * { opacity: 1; transform: translateY(0); }

  /* glow pulse for hero eyebrow */
  @keyframes glow-pulse {
    0%, 100% { text-shadow: 0 0 12px rgba(255,208,0,0.4), 0 0 24px rgba(255,208,0,0.15); }
    50% { text-shadow: 0 0 28px rgba(255,208,0,0.7), 0 0 48px rgba(255,208,0,0.3); }
  }
  .hero-eyebrow { animation: glow-pulse 2.5s ease-in-out infinite; }

  /* floating effect for how-step icons */
  @keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
  }
  .how-step:hover .step-icon { animation: float 1.2s ease-in-out infinite; }

  /* how-step hover glow */
  .how-step { transition: all 0.3s ease; }
  .how-step:hover { transform: translateY(-6px); box-shadow: 0 12px 32px rgba(255,208,0,0.1); }

  /* shine sweep on feat cards */
  .feat::after {
    content: ''; position: absolute; top: 0; left: -100%; width: 60%; height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.06), transparent);
    transition: left 0.7s ease;
  }
  .feat:hover::after { left: 120%; }
  .feat { position: relative; overflow: hidden; transition: all 0.3s ease; }
  .feat:hover { transform: translateY(-6px); box-shadow: 0 16px 40px rgba(0,0,0,0.3); border-color: rgba(255,208,0,0.2); }

  /* section title slide-in */
  .section-inner > .hero-eyebrow,
  .section-inner > h2,
  .section-inner > .lead,
  .trust-inner > .hero-eyebrow,
  .trust-inner > h2 {
    opacity: 0; transform: translateY(30px);
    transition: all 0.7s cubic-bezier(0.22, 1, 0.36, 1);
  }
  .section-inner.visible > .hero-eyebrow,
  .section-inner.visible > h2,
  .section-inner.visible > .lead,
  .trust-inner.visible > .hero-eyebrow,
  .trust-inner.visible > h2 {
    opacity: 1; transform: translateY(0);
  }
  .section-inner.visible > h2 { transition-delay: 0.15s; }
  .section-inner.visible > .lead { transition-delay: 0.3s; }
  .trust-inner.visible > h2 { transition-delay: 0.15s; }

  /* case-card hover */
  .case-card { transition: all 0.3s ease; }
  .case-card:hover { transform: translateY(-6px); box-shadow: 0 16px 40px rgba(0,0,0,0.3); border-color: rgba(255,208,0,0.2); }

  /* ─── RESPONSIVE ─── */
  @media (max-width: 900px) {
    .nav-links { display: none; }
    .hero-inner { grid-template-columns: 1fr; gap: 40px; }
    .hero-screen { max-width: 480px; }
    .how-grid { grid-template-columns: 1fr 1fr; }
    .features-grid { grid-template-columns: 1fr 1fr; }
    .scenarios-grid { grid-template-columns: 1fr 1fr; }
    .case-grid { grid-template-columns: 1fr; }
    .law-items { grid-template-columns: 1fr; }
    .trust-logos { grid-template-columns: repeat(2, 1fr); gap: 20px; }
    .footer-inner { grid-template-columns: 1fr 1fr; gap: 40px; }
    .form-grid { grid-template-columns: 1fr; }
    .form-wrapper { padding: 36px 24px; }
  }
  @media (max-width: 600px) {
    section { padding: 70px 20px; }
    nav { padding: 0 20px; }
    .how-grid, .features-grid, .scenarios-grid { grid-template-columns: 1fr; }
    .trust-logos { grid-template-columns: 1fr; gap: 16px; }
    .trust-logo img { height: 200px; }
    .hero-stats { flex-wrap: wrap; gap: 24px; }
    .compare-table { font-size: 12px; }
    .compare-table td, .compare-table th { padding: 12px 14px; }
  }