/* ===== RESET & BASE ===== */
    *, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
    :root {
      --bg-primary:    #0a0a0f;
      --bg-secondary:  #0d1117;
      --bg-card:       #111827;
      --accent-cyan:   #00d4ff;
      --accent-purple: #7c3aed;
      --accent-glow:   rgba(0, 212, 255, 0.15);
      --border-subtle: rgba(0, 212, 255, 0.15);
      --border-card:   rgba(0, 212, 255, 0.2);
      --text-primary:  #ffffff;
      --text-secondary:#94a3b8;
      --text-muted:    #64748b;
      --font-main:     'Space Grotesk', 'Inter', sans-serif;
      --font-body:     'Inter', sans-serif;
      --transition:    0.3s ease;
      --radius-sm:     8px;
      --radius-md:     12px;
      --radius-lg:     20px;
    }
    html { scroll-behavior: smooth; }
    body {
      background: linear-gradient(180deg, rgba(10,10,15,0.34), rgba(8,12,18,0.28));
      color: var(--text-primary);
      font-family: var(--font-body);
      line-height: 1.7;
      overflow-x: hidden;
    }

    /* ===== SCROLLBAR ===== */
    ::-webkit-scrollbar { width: 6px; }
    ::-webkit-scrollbar-track { background: linear-gradient(180deg, rgba(13,17,23,0.56), rgba(10,13,20,0.48)); }
    ::-webkit-scrollbar-thumb { background: var(--accent-purple); border-radius: 3px; }

    /* ===== PAGE SYSTEM（多頁站台：每頁獨立 HTML，不再用 SPA 切換隱藏） ===== */
    .page { min-height: 100vh; display: block; }

    /* ===== NAVBAR ===== */
    .navbar {
      position: fixed;
      top: 0; left: 0; right: 0;
      z-index: 1000;
      padding: 0 2rem;
      height: 70px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      transition: background var(--transition), backdrop-filter var(--transition);
    }
    .navbar.scrolled {
      background: rgba(10, 10, 15, 0.85);
      backdrop-filter: blur(20px);
      -webkit-backdrop-filter: blur(20px);
      border-bottom: 1px solid var(--border-subtle);
    }
    .nav-logo {
      display: inline-flex;
      align-items: center;
      gap: 0.65rem;
      font-family: var(--font-main);
      font-size: 1.5rem;
      font-weight: 700;
      color: var(--text-primary);
      text-decoration: none;
      letter-spacing: -0.02em;
      cursor: pointer;
    }
    .nav-logo-mark {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
      padding: 5px 7px;
      border-radius: 12px;
      background: linear-gradient(
        160deg,
        rgba(255, 255, 255, 0.2) 0%,
        rgba(255, 255, 255, 0.08) 100%
      );
      border: 1px solid rgba(255, 255, 255, 0.28);
      box-shadow:
        0 1px 0 rgba(255, 255, 255, 0.12) inset,
        0 4px 14px rgba(0, 0, 0, 0.35);
      line-height: 0;
    }
    .nav-logo-img {
      height: clamp(42px, 5.2vw, 54px);
      width: auto;
      max-width: min(46vw, 200px);
      display: block;
      flex-shrink: 0;
      object-fit: contain;
      filter: drop-shadow(0 1px 2px rgba(0, 0, 0, 0.45));
    }
    .nav-logo-text span { color: var(--accent-cyan); }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 2.5rem;
      list-style: none;
    }
    .nav-links li a,
    .nav-links li button {
      background: none;
      border: none;
      color: var(--text-secondary);
      font-family: var(--font-body);
      font-size: 0.9rem;
      font-weight: 500;
      cursor: pointer;
      text-decoration: none;
      transition: color var(--transition);
      letter-spacing: 0.02em;
    }
    .nav-links li a:hover,
    .nav-links li button:hover,
    .nav-links li.active a,
    .nav-links li.active button { color: var(--text-primary); }
    .nav-cta {
      padding: 0.5rem 1.2rem;
      border: 1px solid var(--accent-cyan) !important;
      border-radius: 6px;
      color: var(--accent-cyan) !important;
      transition: all var(--transition) !important;
    }
    .nav-cta:hover {
      background: rgba(0, 212, 255, 0.1) !important;
      box-shadow: 0 0 20px rgba(0, 212, 255, 0.2);
    }
    .hamburger {
      display: none;
      flex-direction: column;
      gap: 5px;
      background: none;
      border: none;
      cursor: pointer;
      padding: 4px;
    }
    .hamburger span {
      display: block;
      width: 24px;
      height: 2px;
      background: var(--text-primary);
      transition: all var(--transition);
      border-radius: 2px;
    }
    .mobile-nav {
      display: none;
      position: fixed;
      top: 70px; left: 0; right: 0;
      background: rgba(10, 10, 15, 0.97);
      backdrop-filter: blur(20px);
      border-bottom: 1px solid var(--border-subtle);
      z-index: 999;
      padding: 1.5rem 2rem;
      flex-direction: column;
      gap: 1rem;
    }
    .mobile-nav.open { display: flex; }
    .mobile-nav button,
    .mobile-nav a {
      background: none;
      border: none;
      color: var(--text-secondary);
      font-size: 1rem;
      cursor: pointer;
      text-align: left;
      padding: 0.5rem 0;
      border-bottom: 1px solid var(--border-subtle);
      font-family: var(--font-body);
      text-decoration: none;
      display: block;
    }
    .mobile-nav button:hover,
    .mobile-nav a:hover { color: var(--text-primary); }

    /* ===== HERO ===== */
    #hero {
      position: relative;
      min-height: 100vh;
      display: flex;
      align-items: center;
      justify-content: center;
      overflow: hidden;
    }
    #hero-canvas {
      position: absolute;
      inset: 0;
      width: 100%;
      height: 100%;
      z-index: 0;
    }
    .hero-glow-1 {
      position: absolute;
      width: 600px; height: 600px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(0,212,255,0.08) 0%, transparent 70%);
      top: -100px; left: -100px;
      pointer-events: none;
    }
    .hero-glow-2 {
      position: absolute;
      width: 500px; height: 500px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(124,58,237,0.1) 0%, transparent 70%);
      bottom: -50px; right: -50px;
      pointer-events: none;
    }
    .hero-content {
      position: relative;
      z-index: 1;
      text-align: center;
      max-width: 900px;
      padding: 2rem;
    }
    .hero-tagline {
      display: inline-flex;
      align-items: center;
      gap: 0.5rem;
      background: rgba(0, 212, 255, 0.08);
      border: 1px solid rgba(0, 212, 255, 0.25);
      border-radius: 50px;
      padding: 0.4rem 1.2rem;
      font-size: 0.8rem;
      font-weight: 600;
      letter-spacing: 0.15em;
      color: var(--accent-cyan);
      text-transform: uppercase;
      margin-bottom: 2rem;
      animation: fadeInDown 0.8s ease both;
    }
    .hero-tagline::before {
      content: '';
      width: 6px; height: 6px;
      background: var(--accent-cyan);
      border-radius: 50%;
      animation: pulse 2s infinite;
    }
    .hero-title {
      font-family: var(--font-main);
      font-size: clamp(2.2rem, 5.5vw, 4rem);
      font-weight: 700;
      line-height: 1.15;
      letter-spacing: -0.03em;
      margin-bottom: 1.5rem;
      animation: fadeInUp 0.8s 0.2s ease both;
    }
    .hero-title .highlight {
      background: linear-gradient(135deg, var(--accent-cyan), #60a5fa);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }
    .hero-subtitle {
      font-size: clamp(1rem, 2vw, 1.15rem);
      color: var(--text-secondary);
      line-height: 1.8;
      max-width: 700px;
      margin: 0 auto 2.5rem;
      animation: fadeInUp 0.8s 0.4s ease both;
    }
    .hero-btns {
      display: flex;
      flex-wrap: wrap;
      gap: 1rem;
      justify-content: center;
      animation: fadeInUp 0.8s 0.6s ease both;
    }
    .btn-primary {
      padding: 0.8rem 2rem;
      background: var(--accent-cyan);
      color: #0a0a0f;
      border: none;
      border-radius: var(--radius-sm);
      font-weight: 700;
      font-size: 0.9rem;
      cursor: pointer;
      transition: all var(--transition);
      letter-spacing: 0.02em;
      font-family: var(--font-body);
    }
    .btn-primary:hover {
      background: #00b8db;
      box-shadow: 0 0 30px rgba(0, 212, 255, 0.4);
      transform: translateY(-2px);
    }
    .btn-outline {
      padding: 0.8rem 2rem;
      background: transparent;
      color: var(--text-primary);
      border: 1px solid rgba(255,255,255,0.25);
      border-radius: var(--radius-sm);
      font-weight: 600;
      font-size: 0.9rem;
      cursor: pointer;
      transition: all var(--transition);
      font-family: var(--font-body);
    }
    .btn-outline:hover {
      border-color: var(--accent-cyan);
      color: var(--accent-cyan);
      background: rgba(0,212,255,0.06);
      transform: translateY(-2px);
    }
    a.btn-primary,
    a.btn-outline {
      display: inline-block;
      text-decoration: none;
      text-align: center;
      box-sizing: border-box;
    }
    a.nav-cta {
      text-decoration: none;
      display: inline-block;
    }

    /* ===== SECTIONS ===== */
    section {
      padding: 6rem 2rem;
    }
    .container {
      max-width: 1200px;
      margin: 0 auto;
    }
    .section-label {
      display: inline-block;
      font-size: 0.75rem;
      font-weight: 700;
      letter-spacing: 0.2em;
      text-transform: uppercase;
      color: var(--accent-cyan);
      margin-bottom: 0.8rem;
    }
    .section-title {
      font-family: var(--font-main);
      font-size: clamp(1.8rem, 3.5vw, 2.8rem);
      font-weight: 700;
      line-height: 1.2;
      letter-spacing: -0.02em;
      margin-bottom: 1.2rem;
    }
    .section-subtitle {
      font-size: 1.05rem;
      color: var(--text-secondary);
      max-width: 680px;
      line-height: 1.8;
    }
    .section-header { margin-bottom: 4rem; }
    .section-header.centered { text-align: center; }
    .section-header.centered .section-subtitle { margin: 0 auto; }

    /* ===== BRAND SECTION ===== */
    #brand {
      background: linear-gradient(180deg, rgba(13,17,23,0.56), rgba(10,13,20,0.48));
    }
    .brand-grid {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 4rem;
      align-items: center;
    }
    .brand-text .lead {
      font-size: 1.1rem;
      color: var(--text-secondary);
      line-height: 1.9;
      margin-bottom: 2.5rem;
    }
    .brand-points {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 1rem;
    }
    .brand-point {
      display: flex;
      align-items: flex-start;
      gap: 0.75rem;
      padding: 1rem;
      background: rgba(0,212,255,0.04);
      border: 1px solid var(--border-card);
      border-radius: var(--radius-sm);
    }
    .brand-point-icon {
      width: 36px; height: 36px;
      background: rgba(0,212,255,0.1);
      border-radius: 8px;
      display: flex;
      align-items: center;
      justify-content: center;
      flex-shrink: 0;
      font-size: 1rem;
    }
    .brand-point-text {
      font-size: 0.85rem;
      color: var(--text-secondary);
      line-height: 1.5;
    }
    .brand-point-text strong {
      display: block;
      color: var(--text-primary);
      font-weight: 600;
      margin-bottom: 0.2rem;
    }
    .brand-visual {
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .brand-diagram {
      position: relative;
      width: 320px;
      height: 320px;
    }
    .diagram-center {
      position: absolute;
      top: 50%; left: 50%;
      transform: translate(-50%, -50%);
      width: 100px; height: 100px;
      background: linear-gradient(135deg, var(--accent-cyan), var(--accent-purple));
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-family: var(--font-main);
      font-size: 1.4rem;
      font-weight: 700;
      color: white;
      z-index: 2;
      box-shadow: 0 0 40px rgba(0,212,255,0.3);
    }
    .diagram-orbit {
      position: absolute;
      inset: 0;
      border-radius: 50%;
      border: 1px dashed rgba(0,212,255,0.2);
      animation: orbit-rotate 20s linear infinite;
    }
    .diagram-orbit-2 {
      inset: 30px;
      animation: orbit-rotate-r 15s linear infinite;
      border-color: rgba(124,58,237,0.2);
    }
    .diagram-node {
      position: absolute;
      width: 50px; height: 50px;
      background: linear-gradient(180deg, rgba(17,24,39,0.74), rgba(12,18,31,0.68));
      border: 1px solid var(--border-card);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.2rem;
      box-shadow: 0 0 20px rgba(0,212,255,0.1);
    }
    .n1 { top: -10px; left: 50%; transform: translateX(-50%); }
    .n2 { right: -10px; top: 50%; transform: translateY(-50%); }
    .n3 { bottom: -10px; left: 50%; transform: translateX(-50%); }
    .n4 { left: -10px; top: 50%; transform: translateY(-50%); }

    /* ===== CAPABILITIES ===== */
    #capabilities { background: linear-gradient(180deg, rgba(10,10,15,0.34), rgba(8,12,18,0.28)); }
    .cap-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.5rem;
    }
    .cap-card {
      background: linear-gradient(180deg, rgba(17,24,39,0.74), rgba(12,18,31,0.68));
      border: 1px solid var(--border-card);
      border-radius: var(--radius-lg);
      padding: 2rem 1.5rem;
      transition: all var(--transition);
      position: relative;
      overflow: hidden;
    }
    .cap-card::before {
      content: '';
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(0,212,255,0.05), transparent);
      opacity: 0;
      transition: opacity var(--transition);
    }
    .cap-card:hover {
      border-color: var(--accent-cyan);
      transform: translateY(-6px);
      box-shadow: 0 20px 60px rgba(0,212,255,0.12);
    }
    .cap-card:hover::before { opacity: 1; }
    .cap-icon {
      width: 56px; height: 56px;
      background: linear-gradient(135deg, rgba(0,212,255,0.15), rgba(124,58,237,0.24));
      border: 1px solid rgba(0,212,255,0.25);
      border-radius: 14px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.6rem;
      margin-bottom: 1.5rem;
    }
    .cap-title {
      font-family: var(--font-main);
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-primary);
      margin-bottom: 0.8rem;
    }
    .cap-desc {
      font-size: 0.85rem;
      color: var(--text-secondary);
      line-height: 1.7;
      margin-bottom: 1.2rem;
    }
    .cap-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 0.4rem;
    }
    .cap-tag {
      font-size: 0.7rem;
      padding: 0.25rem 0.6rem;
      background: rgba(0,212,255,0.08);
      border: 1px solid rgba(0,212,255,0.15);
      border-radius: 30px;
      color: var(--accent-cyan);
      font-weight: 500;
    }

    /* ===== SYSTEMS ===== */
    #systems { background: linear-gradient(180deg, rgba(13,17,23,0.56), rgba(10,13,20,0.48)); }
    .systems-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1.5rem;
    }
    .sys-card {
      background: rgba(255,255,255,0.02);
      border: 1px solid var(--border-card);
      border-radius: var(--radius-md);
      padding: 1.75rem;
      display: flex;
      align-items: flex-start;
      gap: 1.2rem;
      transition: all var(--transition);
    }
    .sys-card:hover {
      border-color: rgba(0,212,255,0.4);
      background: rgba(0,212,255,0.04);
      transform: translateY(-3px);
      box-shadow: 0 12px 40px rgba(0,212,255,0.08);
    }
    .sys-icon {
      width: 48px; height: 48px;
      background: linear-gradient(135deg, rgba(0,212,255,0.12), rgba(124,58,237,0.12));
      border-radius: 12px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      flex-shrink: 0;
    }
    .sys-info h4 {
      font-family: var(--font-main);
      font-size: 0.95rem;
      font-weight: 600;
      color: var(--text-primary);
      margin-bottom: 0.3rem;
    }
    .sys-info p {
      font-size: 0.8rem;
      color: var(--text-muted);
      line-height: 1.5;
    }

    /* ===== TECH STACK ===== */
    #tech { background: linear-gradient(180deg, rgba(10,10,15,0.34), rgba(8,12,18,0.28)); }
    .tech-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 1.5rem;
    }
    .tech-col {
      background: linear-gradient(180deg, rgba(17,24,39,0.74), rgba(12,18,31,0.68));
      border: 1px solid var(--border-card);
      border-radius: var(--radius-md);
      padding: 1.75rem;
    }
    .tech-col h4 {
      font-family: var(--font-main);
      font-size: 0.9rem;
      font-weight: 700;
      color: var(--accent-cyan);
      margin-bottom: 1.2rem;
      padding-bottom: 0.8rem;
      border-bottom: 1px solid var(--border-subtle);
      letter-spacing: 0.03em;
    }
    .tech-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 0.5rem;
    }
    .tech-tag {
      font-size: 0.75rem;
      padding: 0.3rem 0.75rem;
      background: rgba(255,255,255,0.04);
      border: 1px solid rgba(255,255,255,0.1);
      border-radius: 20px;
      color: var(--text-secondary);
      transition: all var(--transition);
    }
    .tech-tag:hover {
      border-color: var(--accent-cyan);
      color: var(--accent-cyan);
      background: rgba(0,212,255,0.06);
    }

    /* ===== PROJECTS SECTION (home) ===== */
    #projects-home { background: linear-gradient(180deg, rgba(13,17,23,0.56), rgba(10,13,20,0.48)); }
    .proj-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 1.5rem;
      margin-bottom: 3rem;
    }
    .proj-card {
      background: linear-gradient(180deg, rgba(17,24,39,0.74), rgba(12,18,31,0.68));
      border: 1px solid var(--border-card);
      border-radius: var(--radius-md);
      padding: 2rem;
      transition: all var(--transition);
      position: relative;
      overflow: hidden;
      cursor: pointer;
    }
    .proj-card::after {
      content: '';
      position: absolute;
      bottom: 0; left: 0; right: 0;
      height: 2px;
      background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple));
      transform: scaleX(0);
      transition: transform var(--transition);
    }
    .proj-card:hover {
      border-color: rgba(0,212,255,0.35);
      transform: translateY(-5px);
      box-shadow: 0 16px 50px rgba(0,212,255,0.1);
    }
    .proj-card:hover::after { transform: scaleX(1); }
    .proj-card-num {
      font-size: 0.7rem;
      color: var(--text-muted);
      font-weight: 600;
      letter-spacing: 0.1em;
      margin-bottom: 1rem;
    }
    .proj-card-title {
      font-family: var(--font-main);
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-primary);
      margin-bottom: 0.75rem;
      line-height: 1.4;
    }
    .proj-card-desc {
      font-size: 0.85rem;
      color: var(--text-secondary);
      line-height: 1.7;
    }
    .proj-see-all {
      text-align: center;
    }

    /* ===== WHY TKS ===== */
    #why { background: linear-gradient(180deg, rgba(10,10,15,0.34), rgba(8,12,18,0.28)); }
    .why-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 2rem;
    }
    .why-card {
      padding: 2rem;
      background: rgba(255,255,255,0.02);
      border: 1px solid var(--border-card);
      border-radius: var(--radius-md);
      transition: all var(--transition);
    }
    .why-card:hover {
      border-color: rgba(0,212,255,0.35);
      background: rgba(0,212,255,0.03);
    }
    .why-num {
      font-family: var(--font-main);
      font-size: 3rem;
      font-weight: 800;
      color: rgba(0,212,255,0.15);
      line-height: 1;
      margin-bottom: 1rem;
    }
    .why-title {
      font-family: var(--font-main);
      font-size: 1.05rem;
      font-weight: 700;
      color: var(--text-primary);
      margin-bottom: 0.75rem;
      line-height: 1.4;
    }
    .why-desc {
      font-size: 0.875rem;
      color: var(--text-secondary);
      line-height: 1.8;
    }

    /* ===== PROCESS ===== */
    #process { background: linear-gradient(180deg, rgba(13,17,23,0.56), rgba(10,13,20,0.48)); }
    .process-steps {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 0;
      position: relative;
    }
    .process-steps::before {
      content: '';
      position: absolute;
      top: 40px; left: 12.5%; right: 12.5%;
      height: 1px;
      background: linear-gradient(90deg, var(--accent-cyan), var(--accent-purple));
      z-index: 0;
    }
    .process-step {
      text-align: center;
      padding: 0 1rem 2rem;
      position: relative;
      z-index: 1;
    }
    .step-circle {
      width: 80px; height: 80px;
      margin: 0 auto 1.5rem;
      background: linear-gradient(180deg, rgba(17,24,39,0.74), rgba(12,18,31,0.68));
      border: 2px solid var(--accent-cyan);
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      font-family: var(--font-main);
      font-size: 1.4rem;
      font-weight: 700;
      color: var(--accent-cyan);
      position: relative;
      transition: all var(--transition);
    }
    .step-circle::after {
      content: '';
      position: absolute;
      inset: -8px;
      border-radius: 50%;
      border: 1px dashed rgba(0,212,255,0.2);
    }
    .process-step:hover .step-circle {
      background: rgba(0,212,255,0.15);
      box-shadow: 0 0 30px rgba(0,212,255,0.3);
    }
    .step-title {
      font-family: var(--font-main);
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-primary);
      margin-bottom: 0.5rem;
    }
    .step-desc {
      font-size: 0.8rem;
      color: var(--text-secondary);
      line-height: 1.6;
    }

    /* ===== CTA SECTION ===== */
    #cta {
      background: linear-gradient(180deg, rgba(10,10,15,0.34), rgba(8,12,18,0.28));
      position: relative;
      overflow: hidden;
    }
    #cta::before {
      content: '';
      position: absolute;
      top: 50%; left: 50%;
      transform: translate(-50%, -50%);
      width: 800px; height: 400px;
      background: radial-gradient(ellipse, rgba(0,212,255,0.06) 0%, transparent 70%);
      pointer-events: none;
    }
    .cta-inner {
      text-align: center;
      max-width: 700px;
      margin: 0 auto;
      position: relative;
      z-index: 1;
    }
    .cta-inner .section-title { margin-bottom: 1rem; }
    .cta-inner p {
      color: var(--text-secondary);
      font-size: 1.05rem;
      line-height: 1.8;
      margin-bottom: 2.5rem;
    }
    .cta-btns {
      display: flex;
      gap: 1rem;
      justify-content: center;
      flex-wrap: wrap;
    }

    /* ===== FOOTER ===== */
    footer {
      background: linear-gradient(180deg, rgba(13,17,23,0.56), rgba(10,13,20,0.48));
      border-top: 1px solid var(--border-subtle);
      padding: 2.5rem 2rem;
    }
    .footer-inner {
      max-width: 1200px;
      margin: 0 auto;
      display: flex;
      align-items: center;
      justify-content: space-between;
      gap: 1rem;
      flex-wrap: wrap;
    }
    .footer-logo {
      font-family: var(--font-main);
      font-size: 1.2rem;
      font-weight: 700;
      color: var(--text-primary);
    }
    .footer-logo span { color: var(--accent-cyan); }
    .footer-copy {
      font-size: 0.8rem;
      color: var(--text-muted);
    }
    .footer-tagline {
      font-size: 0.8rem;
      color: var(--text-muted);
      font-style: italic;
    }

    /* ===== PROJECTS PAGE ===== */
    #page-projects {
      padding-top: 70px;
    }
    .page-hero {
      background: linear-gradient(180deg, rgba(13,17,23,0.56), rgba(10,13,20,0.48));
      padding: 6rem 2rem 4rem;
      text-align: center;
      border-bottom: 1px solid var(--border-subtle);
    }
    .page-hero .section-title { max-width: 700px; margin: 0 auto 1rem; }
    .page-hero .section-subtitle { margin: 0 auto; }
    .projects-list {
      padding: 5rem 2rem;
    }
    .proj-detail-grid {
      display: grid;
      gap: 2rem;
      max-width: 1000px;
      margin: 0 auto;
    }
    .proj-detail-card {
      background: linear-gradient(180deg, rgba(17,24,39,0.74), rgba(12,18,31,0.68));
      border: 1px solid var(--border-card);
      border-radius: var(--radius-lg);
      padding: 2.5rem;
      display: grid;
      grid-template-columns: 80px 1fr;
      gap: 2rem;
      align-items: start;
      transition: all var(--transition);
    }
    .proj-detail-card:hover {
      border-color: rgba(0,212,255,0.35);
      box-shadow: 0 16px 50px rgba(0,212,255,0.08);
      transform: translateX(4px);
    }
    .proj-num-big {
      font-family: var(--font-main);
      font-size: 3rem;
      font-weight: 800;
      color: rgba(0,212,255,0.2);
      line-height: 1;
      padding-top: 0.25rem;
    }
    .proj-detail-content h3 {
      font-family: var(--font-main);
      font-size: 1.3rem;
      font-weight: 700;
      color: var(--text-primary);
      margin-bottom: 1rem;
    }
    .proj-detail-content p {
      font-size: 0.9rem;
      color: var(--text-secondary);
      line-height: 1.8;
      margin-bottom: 0.5rem;
    }
    .proj-detail-content p + p { margin-top: -0.1rem; }
    .proj-detail-lead {
      font-size: 0.9rem;
      color: var(--text-secondary);
      line-height: 1.8;
      margin-bottom: 1rem;
    }
    .proj-scale-badge {
      display: inline-block;
      vertical-align: middle;
      margin-right: 0.35rem;
      padding: 0.2rem 0.65rem;
      font-size: 0.78rem;
      font-weight: 800;
      letter-spacing: 0.04em;
      color: var(--accent-cyan);
      background: rgba(0, 212, 255, 0.12);
      border: 1px solid rgba(0, 212, 255, 0.45);
      border-radius: 6px;
      line-height: 1.35;
      font-family: var(--font-main);
    }
    .proj-bullet {
      display: flex;
      flex-direction: column;
      gap: 0.4rem;
      margin-bottom: 1.5rem;
    }
    .proj-bullet-item {
      display: flex;
      align-items: flex-start;
      gap: 0.6rem;
      font-size: 0.875rem;
      color: var(--text-secondary);
      line-height: 1.6;
    }
    .proj-bullet-item::before {
      content: '→';
      color: var(--accent-cyan);
      flex-shrink: 0;
      margin-top: 0.05rem;
    }
    .proj-detail-tags {
      display: flex;
      flex-wrap: wrap;
      gap: 0.5rem;
      margin-top: 1.2rem;
    }
    .proj-detail-tag {
      font-size: 0.75rem;
      padding: 0.3rem 0.8rem;
      border-radius: 20px;
      font-weight: 600;
      letter-spacing: 0.03em;
    }
    .tag-blue {
      background: rgba(0,212,255,0.1);
      border: 1px solid rgba(0,212,255,0.25);
      color: var(--accent-cyan);
    }
    .tag-purple {
      background: rgba(124,58,237,0.12);
      border: 1px solid rgba(124,58,237,0.3);
      color: #a78bfa;
    }
    .tag-green {
      background: rgba(16,185,129,0.1);
      border: 1px solid rgba(16,185,129,0.25);
      color: #34d399;
    }

    /* ===== CONTACT PAGE ===== */
    #page-contact {
      padding-top: 70px;
    }
    .contact-grid {
      display: grid;
      grid-template-columns: 1fr 1.4fr;
      gap: 4rem;
      align-items: start;
      max-width: 1100px;
      margin: 0 auto;
      padding: 5rem 2rem;
    }
    .contact-info h2 {
      font-family: var(--font-main);
      font-size: 1.8rem;
      font-weight: 700;
      margin-bottom: 1rem;
      line-height: 1.3;
    }
    .contact-info p {
      color: var(--text-secondary);
      font-size: 0.95rem;
      line-height: 1.8;
      margin-bottom: 2.5rem;
    }
    .contact-item {
      display: flex;
      align-items: flex-start;
      gap: 1rem;
      margin-bottom: 1.5rem;
    }
    .contact-icon {
      width: 44px; height: 44px;
      background: rgba(0,212,255,0.1);
      border: 1px solid var(--border-card);
      border-radius: 10px;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.1rem;
      flex-shrink: 0;
    }
    .contact-item-text strong {
      display: block;
      font-size: 0.85rem;
      color: var(--text-primary);
      font-weight: 600;
      margin-bottom: 0.2rem;
    }
    .contact-item-text span {
      font-size: 0.85rem;
      color: var(--text-secondary);
    }
    .contact-item-text a {
      color: var(--accent-cyan);
      text-decoration: none;
      font-weight: 500;
      transition: color var(--transition), text-shadow var(--transition);
    }
    .contact-item-text a:hover {
      color: #fff;
      text-shadow: 0 0 12px rgba(0, 212, 255, 0.45);
      text-decoration: underline;
      text-underline-offset: 3px;
    }
    .contact-services {
      margin-top: 2.5rem;
    }
    .contact-services h4 {
      font-size: 0.8rem;
      font-weight: 700;
      letter-spacing: 0.15em;
      text-transform: uppercase;
      color: var(--accent-cyan);
      margin-bottom: 1rem;
    }
    .service-badges {
      display: flex;
      flex-wrap: wrap;
      gap: 0.5rem;
    }
    .service-badge {
      font-size: 0.75rem;
      padding: 0.3rem 0.75rem;
      background: rgba(255,255,255,0.04);
      border: 1px solid rgba(255,255,255,0.1);
      border-radius: 20px;
      color: var(--text-secondary);
    }
    /* Form */
    .contact-form-wrap {
      background: linear-gradient(180deg, rgba(17,24,39,0.74), rgba(12,18,31,0.68));
      border: 1px solid var(--border-card);
      border-radius: var(--radius-lg);
      padding: 2.5rem;
    }
    .contact-form-wrap h3 {
      font-family: var(--font-main);
      font-size: 1.2rem;
      font-weight: 700;
      margin-bottom: 2rem;
      padding-bottom: 1rem;
      border-bottom: 1px solid var(--border-subtle);
    }
    .form-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 1rem;
    }
    .form-group {
      margin-bottom: 1.25rem;
    }
    .form-group label {
      display: block;
      font-size: 0.8rem;
      font-weight: 600;
      color: var(--text-secondary);
      margin-bottom: 0.5rem;
      letter-spacing: 0.03em;
    }
    .form-group label .required { color: var(--accent-cyan); margin-left: 2px; }
    .form-group input,
    .form-group select,
    .form-group textarea {
      width: 100%;
      background: rgba(255,255,255,0.04);
      border: 1px solid rgba(255,255,255,0.12);
      border-radius: var(--radius-sm);
      padding: 0.75rem 1rem;
      color: var(--text-primary);
      font-family: var(--font-body);
      font-size: 0.9rem;
      transition: border-color var(--transition), box-shadow var(--transition);
      outline: none;
    }
    .form-group select {
      appearance: none;
      background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%2394a3b8' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
      background-repeat: no-repeat;
      background-position: right 1rem center;
    }
    .form-group select option { background: #111827; color: var(--text-primary); }
    .form-group textarea { resize: vertical; min-height: 130px; }
    .form-group input:focus,
    .form-group select:focus,
    .form-group textarea:focus {
      border-color: var(--accent-cyan);
      box-shadow: 0 0 0 3px rgba(0,212,255,0.08);
    }
    .form-group input.error,
    .form-group select.error,
    .form-group textarea.error {
      border-color: #f87171;
    }
    .form-error-msg {
      font-size: 0.75rem;
      color: #f87171;
      margin-top: 0.3rem;
      display: none;
    }
    .form-error-msg.show { display: block; }
    .form-submit { width: 100%; padding: 1rem; font-size: 1rem; margin-top: 0.5rem; }
    .form-success {
      display: none;
      text-align: center;
      padding: 2rem;
    }
    .form-success.show { display: block; }
    .form-success .success-icon {
      font-size: 3rem;
      margin-bottom: 1rem;
    }
    .form-success h4 {
      font-family: var(--font-main);
      font-size: 1.2rem;
      margin-bottom: 0.5rem;
    }
    .form-success p { color: var(--text-secondary); font-size: 0.9rem; }

    /* ===== ANIMATIONS ===== */
    @keyframes fadeInUp {
      from { opacity: 0; transform: translateY(30px); }
      to   { opacity: 1; transform: translateY(0); }
    }
    @keyframes fadeInDown {
      from { opacity: 0; transform: translateY(-20px); }
      to   { opacity: 1; transform: translateY(0); }
    }
    @keyframes pulse {
      0%, 100% { opacity: 1; transform: scale(1); }
      50%       { opacity: 0.5; transform: scale(0.8); }
    }
    @keyframes orbit-rotate {
      from { transform: rotate(0deg); }
      to   { transform: rotate(360deg); }
    }
    @keyframes orbit-rotate-r {
      from { transform: rotate(0deg); }
      to   { transform: rotate(-360deg); }
    }
    .reveal {
      opacity: 0;
      transform: translateY(40px);
      transition: opacity 0.7s ease, transform 0.7s ease;
    }
    .reveal.visible {
      opacity: 1;
      transform: translateY(0);
    }
    .reveal-delay-1 { transition-delay: 0.1s; }
    .reveal-delay-2 { transition-delay: 0.2s; }
    .reveal-delay-3 { transition-delay: 0.3s; }
    .reveal-delay-4 { transition-delay: 0.4s; }

    /* ===== RESPONSIVE ===== */
    @media (max-width: 1100px) {
      .cap-grid { grid-template-columns: repeat(2, 1fr); }
      .tech-grid { grid-template-columns: repeat(2, 1fr); }
      .process-steps { grid-template-columns: repeat(2, 1fr); }
      .process-steps::before { display: none; }
    }
    @media (max-width: 900px) {
      .brand-grid { grid-template-columns: 1fr; }
      .brand-visual { display: none; }
      .systems-grid { grid-template-columns: repeat(2, 1fr); }
      .proj-grid { grid-template-columns: repeat(2, 1fr); }
      .why-grid { grid-template-columns: 1fr; }
      .proj-detail-card { grid-template-columns: 1fr; }
      .proj-num-big { font-size: 2rem; }
      .contact-grid { grid-template-columns: 1fr; }
    }
    @media (max-width: 640px) {
      .nav-links { display: none; }
      .hamburger { display: flex; }
      .cap-grid { grid-template-columns: 1fr; }
      .systems-grid { grid-template-columns: 1fr; }
      .proj-grid { grid-template-columns: 1fr; }
      .tech-grid { grid-template-columns: 1fr; }
      .process-steps { grid-template-columns: 1fr; }
      .brand-points { grid-template-columns: 1fr; }
      .form-row { grid-template-columns: 1fr; }
      .hero-btns { flex-direction: column; align-items: center; }
      section { padding: 4rem 1.25rem; }
      .contact-grid { padding: 3rem 1.25rem; }
    }

    /* ===== DIVIDER ===== */
    .gradient-divider {
      height: 1px;
      background: linear-gradient(90deg, transparent, var(--accent-cyan), transparent);
      margin: 0;
      opacity: 0.3;
    }
  
    /* ===== GLOBAL AMBIENT BACKGROUND UPGRADE ===== */
    body {
      position: relative;
      background:
        radial-gradient(circle at 15% 20%, rgba(0, 212, 255, 0.05), transparent 28%),
        radial-gradient(circle at 85% 15%, rgba(124, 58, 237, 0.05), transparent 30%),
        radial-gradient(circle at 60% 80%, rgba(0, 212, 255, 0.04), transparent 26%),
        linear-gradient(180deg, #07090e 0%, #0a0a0f 40%, #0b0f16 100%);
      background-attachment: fixed;
    }
    body::before {
      content: "";
      position: fixed;
      inset: 0;
      z-index: -3;
      background:
        radial-gradient(circle at 20% 30%, rgba(0, 212, 255, 0.08), transparent 30%),
        radial-gradient(circle at 82% 18%, rgba(124, 58, 237, 0.09), transparent 26%),
        radial-gradient(circle at 70% 72%, rgba(0, 212, 255, 0.05), transparent 30%);
      filter: blur(30px);
      animation: ambientShift 18s ease-in-out infinite alternate;
      pointer-events: none;
    }
    body::after {
      content: "";
      position: fixed;
      inset: 0;
      z-index: -2;
      background-image:
        linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
      background-size: 42px 42px;
      mask-image: radial-gradient(circle at center, black 35%, transparent 90%);
      opacity: 0.32;
      pointer-events: none;
    }
    .site-bg {
      position: fixed;
      inset: 0;
      z-index: -1;
      overflow: hidden;
      pointer-events: none;
    }
    .bg-blob {
      position: absolute;
      border-radius: 50%;
      filter: blur(90px);
      opacity: 0.22;
      mix-blend-mode: screen;
      animation: blobFloat 18s ease-in-out infinite;
    }
    .blob-1 {
      width: 420px; height: 420px;
      background: rgba(0, 212, 255, 0.18);
      top: 12%; left: -8%;
      animation-delay: 0s;
    }
    .blob-2 {
      width: 360px; height: 360px;
      background: rgba(124, 58, 237, 0.2);
      top: 48%; right: -6%;
      animation-delay: -7s;
    }
    .blob-3 {
      width: 280px; height: 280px;
      background: rgba(0, 212, 255, 0.14);
      bottom: 6%; left: 12%;
      animation-delay: -11s;
    }
    .bg-vignette {
      position: absolute;
      inset: 0;
      background:
        radial-gradient(circle at center, transparent 35%, rgba(2, 6, 12, 0.35) 100%),
        linear-gradient(180deg, rgba(6,10,16,0.18), rgba(6,10,16,0.35));
    }
    .particles {
      position: absolute;
      inset: 0;
      overflow: hidden;
    }
    .particle {
      position: absolute;
      width: 2px;
      height: 2px;
      border-radius: 50%;
      background: rgba(255,255,255,0.65);
      box-shadow: 0 0 12px rgba(0, 212, 255, 0.35);
      animation: particleFloat linear infinite;
    }

    /* ===== SECTION DEPTH / GLOW ===== */
    section {
      position: relative;
      isolation: isolate;
      overflow: hidden;
    }
    section::before,
    section::after {
      content: "";
      position: absolute;
      width: 420px;
      height: 420px;
      border-radius: 50%;
      filter: blur(95px);
      opacity: 0.16;
      z-index: -1;
      pointer-events: none;
    }
    section::before {
      top: -150px;
      right: -120px;
      background: radial-gradient(circle, rgba(0, 212, 255, 0.75), transparent 70%);
    }
    section::after {
      bottom: -180px;
      left: -140px;
      background: radial-gradient(circle, rgba(124, 58, 237, 0.72), transparent 70%);
      opacity: 0.12;
    }
    #hero::before, #hero::after { display:none; }
    #brand::before { opacity: 0.20; }
    #capabilities::before { opacity: 0.18; }
    #systems::after { opacity: 0.18; }
    #tech::before {
      opacity: 0.14;
      background: radial-gradient(circle, rgba(0, 212, 255, 0.65), transparent 72%);
    }
    #projects-home::before {
      opacity: 0.18;
      background: radial-gradient(circle, rgba(124, 58, 237, 0.72), transparent 72%);
    }
    #why::after { opacity: 0.16; }
    #process::before { opacity: 0.20; }
    #cta::before { opacity: 0.85; }

    /* ===== VISUAL TEXTURE UPGRADE ===== */
    #systems,
    #projects-home,
    #process,
    .page-hero {
      background-image:
        linear-gradient(120deg, rgba(255,255,255,0.015), rgba(255,255,255,0) 35%),
        linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
      background-size: auto, 48px 48px, 48px 48px;
      background-position: center, center, center;
    }

    /* ===== INNER PAGE HERO ENHANCE ===== */
    .page-hero {
      position: relative;
      overflow: hidden;
      background:
        radial-gradient(circle at 18% 22%, rgba(0,212,255,0.12), transparent 25%),
        radial-gradient(circle at 82% 28%, rgba(124,58,237,0.12), transparent 28%),
        linear-gradient(180deg, rgba(13,17,23,0.98), rgba(8,12,18,0.98));
    }
    .page-hero::before {
      content: "";
      position: absolute;
      inset: 0;
      background:
        linear-gradient(130deg, transparent 0%, rgba(255,255,255,0.04) 36%, transparent 50%),
        radial-gradient(circle at center, transparent 30%, rgba(0,0,0,0.18) 100%);
      pointer-events: none;
    }
    .page-hero::after {
      content: "";
      position: absolute;
      width: 500px;
      height: 500px;
      right: -120px;
      top: -180px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(0, 212, 255, 0.2), transparent 70%);
      filter: blur(55px);
      pointer-events: none;
    }

    /* ===== CARD / COMPONENT POLISH ===== */
    .cap-card,
    .sys-card,
    .proj-card,
    .why-card,
    .tech-col,
    .proj-detail-card,
    .contact-form-wrap {
      backdrop-filter: blur(8px);
      -webkit-backdrop-filter: blur(8px);
      box-shadow: 0 10px 34px rgba(0,0,0,0.22);
    }
    .cap-card::after,
    .proj-card::before,
    .sys-card::before,
    .why-card::before,
    .tech-col::before,
    .contact-form-wrap::before {
      content: "";
      position: absolute;
      inset: 0;
      border-radius: inherit;
      background: linear-gradient(120deg, rgba(255,255,255,0.06), transparent 28%, transparent 72%, rgba(255,255,255,0.03));
      opacity: 0;
      transition: opacity var(--transition);
      pointer-events: none;
    }
    .cap-card:hover::after,
    .proj-card:hover::before,
    .sys-card:hover::before,
    .why-card:hover::before,
    .tech-col:hover::before,
    .contact-form-wrap:hover::before { opacity: 1; }

    .cap-icon,
    .sys-icon,
    .brand-point-icon,
    .contact-icon,
    .diagram-node {
      transition: transform var(--transition), box-shadow var(--transition), background var(--transition);
    }
    .cap-card:hover .cap-icon,
    .sys-card:hover .sys-icon,
    .brand-point:hover .brand-point-icon,
    .contact-item:hover .contact-icon,
    .proj-card:hover .proj-card-title {
      transform: translateY(-2px) scale(1.05);
    }
    .cap-card:hover .cap-icon,
    .sys-card:hover .sys-icon,
    .contact-item:hover .contact-icon {
      box-shadow: 0 0 24px rgba(0, 212, 255, 0.22);
    }
    .proj-card {
      background:
        linear-gradient(180deg, rgba(255,255,255,0.02), rgba(255,255,255,0.00)),
        var(--bg-card);
    }
    .proj-card-title,
    .cap-title,
    .why-title,
    .step-title,
    .proj-detail-content h3 {
      text-wrap: balance;
    }
    .proj-card:hover .proj-card-title,
    .cap-card:hover .cap-title,
    .why-card:hover .why-title {
      color: var(--accent-cyan);
    }
    .proj-detail-card:first-child {
      background:
        radial-gradient(circle at top right, rgba(0,212,255,0.09), transparent 30%),
        linear-gradient(180deg, rgba(255,255,255,0.03), rgba(255,255,255,0.01)),
        var(--bg-card);
      border-color: rgba(0,212,255,0.45);
      box-shadow: 0 18px 56px rgba(0, 212, 255, 0.12);
    }
    .contact-form-wrap {
      background:
        radial-gradient(circle at top right, rgba(124,58,237,0.08), transparent 30%),
        linear-gradient(180deg, rgba(255,255,255,0.03), rgba(255,255,255,0.015)),
        var(--bg-card);
    }
    .contact-info {
      position: relative;
    }
    .contact-info::after {
      content: "BUILD SYSTEMS";
      position: absolute;
      left: 0;
      bottom: -1.2rem;
      font-family: var(--font-main);
      font-weight: 800;
      font-size: clamp(2.2rem, 6vw, 5rem);
      letter-spacing: 0.06em;
      color: rgba(255,255,255,0.03);
      pointer-events: none;
      line-height: 1;
      white-space: nowrap;
    }

    /* ===== BUTTON / NAV POLISH ===== */
    .btn-primary,
    .btn-outline,
    .nav-cta {
      position: relative;
      overflow: hidden;
    }
    .btn-primary::before,
    .btn-outline::before,
    .nav-cta::before {
      content: "";
      position: absolute;
      inset: 0;
      transform: translateX(-120%);
      background: linear-gradient(110deg, transparent 0%, rgba(255,255,255,0.24) 45%, transparent 55%);
      transition: transform 0.7s ease;
    }
    .btn-primary:hover::before,
    .btn-outline:hover::before,
    .nav-cta:hover::before {
      transform: translateX(120%);
    }

    /* ===== ANIMATIONS EXTRA ===== */
    @keyframes ambientShift {
      0% { transform: scale(1) translate3d(0,0,0); }
      50% { transform: scale(1.06) translate3d(1.2%, -1%, 0); }
      100% { transform: scale(1.02) translate3d(-1.2%, 1.3%, 0); }
    }
    @keyframes blobFloat {
      0% { transform: translate3d(0,0,0) scale(1); }
      33% { transform: translate3d(24px,-18px,0) scale(1.05); }
      66% { transform: translate3d(-18px,20px,0) scale(0.96); }
      100% { transform: translate3d(6px,-10px,0) scale(1.02); }
    }
    @keyframes particleFloat {
      0% { transform: translateY(0) translateX(0) scale(0.8); opacity: 0; }
      10% { opacity: 0.55; }
      90% { opacity: 0.35; }
      100% { transform: translateY(-120vh) translateX(28px) scale(1.1); opacity: 0; }
    }


/* ===== GLOBAL VISUAL UPGRADE STRONGER ===== */
body::before{
  content:"";
  position:fixed;
  inset:0;
  z-index:-3;
  background:
    radial-gradient(circle at 15% 18%, rgba(0,212,255,0.28) 0%, rgba(0,212,255,0.08) 18%, transparent 42%),
    radial-gradient(circle at 82% 22%, rgba(124,58,237,0.28) 0%, rgba(124,58,237,0.10) 20%, transparent 45%),
    radial-gradient(circle at 72% 78%, rgba(0,212,255,0.24) 0%, rgba(0,212,255,0.07) 16%, transparent 40%),
    radial-gradient(circle at 22% 82%, rgba(124,58,237,0.24) 0%, rgba(124,58,237,0.08) 18%, transparent 40%),
    linear-gradient(180deg, #070a12 0%, #090d16 28%, #0a0f18 55%, #090c14 100%);
  pointer-events:none;
}
body::after{
  content:"";
  position:fixed;
  inset:0;
  z-index:-2;
  opacity:0.52;
  background-image:
    linear-gradient(rgba(0,212,255,0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(124,58,237,0.08) 1px, transparent 1px);
  background-size: 42px 42px;
  mask-image: radial-gradient(circle at center, black 42%, transparent 95%);
  -webkit-mask-image: radial-gradient(circle at center, black 42%, transparent 95%);
  pointer-events:none;
}
.global-aurora{
  position:fixed;
  inset:-10%;
  z-index:-1;
  overflow:hidden;
  pointer-events:none;
  filter: blur(80px) saturate(125%);
  opacity:1;
}
.global-aurora span{
  position:absolute;
  display:block;
  border-radius:50%;
  mix-blend-mode:screen;
  animation: driftBlob linear infinite alternate;
}
.global-aurora .b1{
  width:540px;height:540px;left:-80px;top:8%;
  background:radial-gradient(circle, rgba(0,212,255,0.30) 0%, rgba(0,212,255,0.10) 38%, transparent 72%);
  animation-duration:22s;
}
.global-aurora .b2{
  width:620px;height:620px;right:-120px;top:24%;
  background:radial-gradient(circle, rgba(124,58,237,0.28) 0%, rgba(124,58,237,0.10) 40%, transparent 72%);
  animation-duration:26s;
}
.global-aurora .b3{
  width:500px;height:500px;left:28%;bottom:-80px;
  background:radial-gradient(circle, rgba(0,212,255,0.30) 0%, rgba(0,212,255,0.08) 36%, transparent 72%);
  animation-duration:24s;
}
.global-aurora .b4{
  width:420px;height:420px;right:18%;bottom:18%;
  background:radial-gradient(circle, rgba(124,58,237,0.30) 0%, rgba(124,58,237,0.09) 36%, transparent 72%);
  animation-duration:20s;
}
.global-particles{
  position:fixed;
  inset:0;
  z-index:-1;
  pointer-events:none;
  opacity:1;
  background:
    radial-gradient(circle at 8% 12%, rgba(255,255,255,0.65) 0 1px, transparent 2px),
    radial-gradient(circle at 18% 72%, rgba(0,212,255,0.75) 0 1.2px, transparent 2.2px),
    radial-gradient(circle at 32% 24%, rgba(255,255,255,0.55) 0 1px, transparent 2px),
    radial-gradient(circle at 46% 58%, rgba(124,58,237,0.65) 0 1.2px, transparent 2.2px),
    radial-gradient(circle at 64% 18%, rgba(255,255,255,0.55) 0 1px, transparent 2px),
    radial-gradient(circle at 78% 46%, rgba(0,212,255,0.75) 0 1.2px, transparent 2.2px),
    radial-gradient(circle at 88% 82%, rgba(255,255,255,0.58) 0 1px, transparent 2px),
    radial-gradient(circle at 58% 86%, rgba(124,58,237,0.70) 0 1.2px, transparent 2.2px);
  animation: particlesFloat 18s ease-in-out infinite alternate;
}
section{
  position:relative;
  overflow:hidden;
}
section::before{
  content:"";
  position:absolute;
  width:420px;height:420px;
  border-radius:50%;
  filter: blur(90px);
  opacity:0.78;
  pointer-events:none;
}
#brand::before{right:-100px;top:-50px;background:radial-gradient(circle, rgba(0,212,255,0.30), transparent 68%);}
#capabilities::before{left:-120px;top:20%;background:radial-gradient(circle, rgba(124,58,237,0.28), transparent 70%);}
#systems::before{right:-120px;bottom:-40px;background:radial-gradient(circle, rgba(0,212,255,0.22), transparent 70%);}
#tech::before{left:20%;top:-120px;background:radial-gradient(circle, rgba(124,58,237,0.18), transparent 70%);}
#projects-home::before{right:12%;top:14%;background:radial-gradient(circle, rgba(0,212,255,0.28), transparent 70%);}
#why::before{left:-140px;bottom:-90px;background:radial-gradient(circle, rgba(124,58,237,0.30), transparent 70%);}
#process::before{right:-120px;top:16%;background:radial-gradient(circle, rgba(0,212,255,0.30), transparent 70%);}
#cta::before{
  opacity:1 !important;
  background:radial-gradient(ellipse, rgba(0,212,255,0.14) 0%, rgba(124,58,237,0.08) 35%, transparent 72%) !important;
}
.page-hero{
  position:relative;
  overflow:hidden;
  background:
    radial-gradient(circle at 18% 30%, rgba(0,212,255,0.24), transparent 34%),
    radial-gradient(circle at 84% 24%, rgba(124,58,237,0.18), transparent 36%),
    linear-gradient(180deg, rgba(13,17,23,0.94), rgba(10,10,15,0.86)) !important;
}
.page-hero::before{
  content:"";
  position:absolute;
  inset:0;
  background-image:
    linear-gradient(rgba(0,212,255,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(124,58,237,0.06) 1px, transparent 1px);
  background-size: 38px 38px;
  opacity:0.62;
  mask-image: radial-gradient(circle at center, black 38%, transparent 100%);
  -webkit-mask-image: radial-gradient(circle at center, black 38%, transparent 100%);
  pointer-events:none;
}
.cap-card,.sys-card,.tech-col,.proj-card,.why-card,.proj-detail-card,.contact-form-wrap{
  background: linear-gradient(180deg, rgba(17,24,39,0.88), rgba(12,18,31,0.82)) !important;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  box-shadow: 0 12px 44px rgba(0,0,0,0.22), inset 0 1px 0 rgba(255,255,255,0.02);
}
.cap-card::after,.proj-card::before,.why-card::before{
  content:"";
  position:absolute;
  inset:0;
  background: linear-gradient(120deg, transparent 10%, rgba(255,255,255,0.05) 30%, transparent 55%);
  transform: translateX(-120%);
  transition: transform .8s ease;
  pointer-events:none;
}
.cap-card:hover::after,.proj-card:hover::before,.why-card:hover::before{
  transform: translateX(120%);
}
.cap-icon,.sys-icon,.contact-icon{
  box-shadow: 0 0 20px rgba(0,212,255,0.24), inset 0 0 20px rgba(255,255,255,0.02);
}
.process-steps::before{
  height:2px !important;
  opacity:1;
  box-shadow: 0 0 18px rgba(0,212,255,0.28);
}
.step-circle{
  box-shadow: 0 0 0 8px rgba(0,212,255,0.03), 0 0 24px rgba(0,212,255,0.28);
}
.contact-info::before{
  content:"BUILD SYSTEMS";
  position:absolute;
  left:0; top:-10px;
  font-family: var(--font-main);
  font-size: clamp(3.2rem, 8vw, 6rem);
  font-weight:800;
  letter-spacing:-0.04em;
  color: rgba(255,255,255,0.028);
  pointer-events:none;
  white-space:nowrap;
}
.contact-info{position:relative;}
@keyframes driftBlob{
  from{transform: translate3d(0,0,0) scale(1);}
  to{transform: translate3d(60px,-40px,0) scale(1.12);}
}
@keyframes particlesFloat{
  from{transform: translateY(0px) translateX(0px);}
  to{transform: translateY(-18px) translateX(8px);}
}
@media (max-width: 900px){
  body::after{opacity:0.28;}
  .global-aurora{opacity:0.9;}
  section::before{opacity:0.58;}
}


/* ===== VERSION A EXTRA STRONGER AMBIENT ===== */
body .ambient-scan{
  position:fixed; inset:0; z-index:-1; pointer-events:none; overflow:hidden;
}
body .ambient-scan::before, body .ambient-scan::after{
  content:""; position:absolute; inset:-20%;
  background:
    linear-gradient(115deg, transparent 30%, rgba(0,212,255,0.10) 42%, rgba(0,212,255,0.02) 50%, transparent 62%),
    linear-gradient(295deg, transparent 24%, rgba(124,58,237,0.08) 40%, rgba(124,58,237,0.02) 48%, transparent 64%);
  filter: blur(34px);
  animation: scanSweep 22s ease-in-out infinite alternate;
}
body .ambient-scan::after{ animation-duration: 28s; opacity:0.9; }
@keyframes scanSweep{
  from{ transform: translateX(-4%) translateY(0%) scale(1); }
  to{ transform: translateX(4%) translateY(-3%) scale(1.04); }
}
section{ backdrop-filter: blur(0.5px); }


/* ===== VERSION A2 VISIBILITY + CURSOR FIX ===== */
/* make section backgrounds more transparent so ambient effects show through */
#brand{background:linear-gradient(180deg, rgba(13,17,23,0.42), rgba(10,13,20,0.30)) !important;}
#capabilities{background:linear-gradient(180deg, rgba(10,10,15,0.20), rgba(8,12,18,0.16)) !important;}
#systems{background:linear-gradient(180deg, rgba(13,17,23,0.38), rgba(10,13,20,0.28)) !important;}
#tech{background:linear-gradient(180deg, rgba(10,10,15,0.18), rgba(8,12,18,0.14)) !important;}
#projects-home{background:linear-gradient(180deg, rgba(13,17,23,0.40), rgba(10,13,20,0.30)) !important;}
#why{background:linear-gradient(180deg, rgba(10,10,15,0.18), rgba(8,12,18,0.14)) !important;}
#process{background:linear-gradient(180deg, rgba(13,17,23,0.38), rgba(10,13,20,0.28)) !important;}
#cta{background:linear-gradient(180deg, rgba(10,10,15,0.18), rgba(8,12,18,0.14)) !important;}
/* lighten cards a touch, increase glass effect */
.cap-card,.sys-card,.tech-col,.proj-card,.why-card,.proj-detail-card,.contact-form-wrap{
  background:linear-gradient(180deg, rgba(17,24,39,0.62), rgba(12,18,31,0.54)) !important;
  border-color: rgba(120,190,255,0.32) !important;
}
/* stronger and clearer ambient layers */
body::before{
  background:
    radial-gradient(circle at 15% 18%, rgba(0,212,255,0.26) 0%, rgba(0,212,255,0.11) 18%, transparent 48%),
    radial-gradient(circle at 82% 22%, rgba(124,58,237,0.24) 0%, rgba(124,58,237,0.11) 20%, transparent 50%),
    radial-gradient(circle at 72% 78%, rgba(0,212,255,0.22) 0%, rgba(0,212,255,0.10) 16%, transparent 46%),
    radial-gradient(circle at 22% 82%, rgba(124,58,237,0.20) 0%, rgba(124,58,237,0.10) 18%, transparent 44%),
    linear-gradient(180deg, #08101a 0%, #09111b 28%, #0a121b 55%, #081019 100%) !important;
}
body::after{
  opacity:0.62 !important;
}
.global-aurora{
  opacity:1 !important;
  filter: blur(70px) saturate(132%) !important;
}
.global-particles{
  opacity:1 !important;
}
/* make section glows clearer */
section::before{
  opacity:0.92 !important;
  filter: blur(72px) !important;
}
/* cursor + selection fix for decorative icons/text glyphs */
.cap-icon,.sys-icon,.contact-icon,.brand-point-icon,.diagram-node,.hero-tagline::before,.proj-card-num,.why-num,.step-circle,.success-icon{
  user-select:none;
  -webkit-user-select:none;
  cursor:default;
}
.proj-card,.btn-primary,.btn-outline,.nav-logo,.nav-links li a,.nav-links li button,.mobile-nav button,.mobile-nav a,.nav-cta{
  cursor:pointer !important;
}
.hero-title,.section-title,.cap-title,.proj-card-title,.why-title,.step-title,.footer-logo{
  user-select:none;
  -webkit-user-select:none;
}
/* ensure cards feel more clickable */
.proj-card,.cap-card,.why-card{
  transition: transform .3s ease, box-shadow .3s ease, border-color .3s ease, background .3s ease;
}
.proj-card:hover,.cap-card:hover,.why-card:hover{
  box-shadow: 0 18px 56px rgba(0,212,255,0.16), 0 6px 18px rgba(0,0,0,0.20) !important;
}
/* visible page hero */
.page-hero{
  background:
    radial-gradient(circle at 18% 30%, rgba(0,212,255,0.20), transparent 36%),
    radial-gradient(circle at 84% 24%, rgba(124,58,237,0.20), transparent 38%),
    linear-gradient(180deg, rgba(13,17,23,0.74), rgba(10,10,15,0.62)) !important;
}

/* 專案頁：標籤列 + 右側洽詢（舊版 .projects-legal-banner 已停用） */
.proj-detail-tags-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem 1rem;
  margin-top: 1.2rem;
}
.proj-detail-tags-row .proj-detail-tags {
  margin-top: 0;
  flex: 1 1 auto;
  min-width: 0;
}
.proj-detail-tags-actions {
  flex-shrink: 0;
  margin-left: auto;
}
@media (max-width: 520px) {
  .proj-detail-tags-row .proj-detail-tags-actions {
    margin-left: 0;
    width: 100%;
  }
  .proj-detail-tags-row .proj-detail-contact-btn {
    width: 100%;
    justify-content: center;
  }
}

.proj-page-legal-collapse {
  max-width: 920px;
  margin: 2rem auto 0;
  padding: 0.6rem 0.9rem;
  font-size: 0.72rem;
  line-height: 1.65;
  color: var(--text-muted);
  border: 1px solid rgba(255,255,255,0.06);
  border-radius: var(--radius-sm);
  background: rgba(0,0,0,0.2);
}
.proj-page-legal-collapse summary {
  cursor: pointer;
  color: var(--text-muted);
  font-size: 0.76rem;
  list-style: none;
}
.proj-page-legal-collapse summary::-webkit-details-marker { display: none; }
.proj-page-legal-collapse summary::after {
  content: ' ▸';
  font-size: 0.65rem;
  opacity: 0.7;
}
.proj-page-legal-collapse[open] summary::after { content: ' ▾'; }
.proj-page-legal-collapse-body {
  margin-top: 0.65rem;
  padding-top: 0.65rem;
  border-top: 1px solid rgba(255,255,255,0.06);
}
.proj-page-legal-collapse-body p { margin-bottom: 0.5rem; }
.proj-page-legal-collapse-body p:last-child { margin-bottom: 0; }

.proj-detail-hint {
  margin-top: 1.25rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border-subtle);
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.65;
}
.proj-detail-hint a {
  color: var(--accent-cyan);
  text-decoration: none;
  font-weight: 600;
}
.proj-detail-hint a:hover { text-decoration: underline; }

.proj-detail-tags-row .proj-detail-contact-btn {
  margin-top: 0;
}
.proj-detail-contact-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.35rem;
  margin-top: 0.65rem;
  padding: 0.45rem 1rem;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent-cyan);
  border: 1px solid rgba(0, 212, 255, 0.35);
  border-radius: 6px;
  background: rgba(0, 212, 255, 0.06);
  text-decoration: none;
  transition: all var(--transition);
  font-family: var(--font-body);
}
.proj-detail-contact-btn:hover {
  background: rgba(0, 212, 255, 0.12);
  box-shadow: 0 0 16px rgba(0, 212, 255, 0.15);
}

.public-example-note {
  margin-top: 0.75rem;
  padding: 0.75rem 1rem;
  font-size: 0.8rem;
  line-height: 1.65;
  color: var(--text-muted);
  background: rgba(124, 58, 237, 0.08);
  border: 1px solid rgba(124, 58, 237, 0.22);
  border-radius: var(--radius-sm);
}

/* Homepage collaboration section layout tuning */
.collaboration-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr)) !important;
  max-width: 980px;
  margin: 0 auto;
}
.collaboration-card .collab-mode-desc {
  margin-top: 0.75rem;
  font-size: 0.88rem;
  line-height: 1.75;
  color: var(--text-secondary);
}

/* Homepage floating section shortcuts */
.quick-section-nav {
  position: fixed;
  right: 18px;
  top: 50%;
  transform: translateY(-50%);
  z-index: 1002;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.quick-section-nav button {
  border: 1px solid rgba(0, 212, 255, 0.28);
  background: rgba(10, 16, 26, 0.82);
  color: var(--text-secondary);
  font-size: 0.72rem;
  font-family: var(--font-body);
  letter-spacing: 0.02em;
  border-radius: 999px;
  padding: 0.38rem 0.72rem;
  cursor: pointer;
  backdrop-filter: blur(8px);
  transition: all var(--transition);
}
.quick-section-nav button:hover {
  color: var(--text-primary);
  border-color: rgba(0, 212, 255, 0.52);
  background: rgba(0, 212, 255, 0.12);
}
.quick-section-nav button.active {
  color: #071019;
  border-color: rgba(0, 212, 255, 0.95);
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.95), rgba(0, 212, 255, 0.78));
  box-shadow: 0 0 18px rgba(0, 212, 255, 0.28);
}
@media (max-width: 1024px) {
  #page-home {
    padding-bottom: calc(4.25rem + env(safe-area-inset-bottom, 0px));
  }
  .quick-section-nav {
    flex-direction: row;
    flex-wrap: nowrap;
    align-items: center;
    top: auto;
    right: 0;
    left: 0;
    bottom: 0;
    transform: none;
    gap: 0.5rem;
    padding: 0.5rem 0.75rem calc(0.55rem + env(safe-area-inset-bottom, 0px));
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    background: rgba(10, 16, 26, 0.96);
    border-top: 1px solid rgba(0, 212, 255, 0.22);
    backdrop-filter: blur(12px);
  }
  .quick-section-nav::-webkit-scrollbar {
    display: none;
  }
  .quick-section-nav button {
    flex: 0 0 auto;
    white-space: nowrap;
    font-size: 0.68rem;
    padding: 0.42rem 0.62rem;
  }
}

@media (max-width: 900px) {
  .collaboration-grid {
    grid-template-columns: 1fr !important;
    max-width: 100%;
  }
  .collaboration-card {
    padding: 1.5rem 1.25rem;
  }
  .collaboration-card h4 {
    font-size: 1rem;
    line-height: 1.45;
  }
}

/* Contact page — long-term partnership block (below contact form) */
.contact-cooperation {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 2rem 4rem;
}
.contact-grid + .contact-cooperation {
  padding-top: 3.5rem;
  margin-top: 0;
}
.page-hero + .contact-cooperation {
  padding-top: 3rem;
}
.contact-cooperation-inner {
  padding: 1.75rem 1.5rem;
  border-radius: var(--radius-md);
  border: 1px solid rgba(0, 212, 255, 0.22);
  background: linear-gradient(135deg, rgba(0, 212, 255, 0.06), rgba(124, 58, 237, 0.05));
}
.contact-grid:has(+ .contact-cooperation) {
  padding-bottom: 2.5rem;
}
.contact-cooperation-title {
  font-family: var(--font-main);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text-primary);
  margin: 0.35rem 0 0.75rem;
}
.contact-cooperation-desc {
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--text-secondary);
  margin: 0 0 1.25rem;
  max-width: 52rem;
}
.contact-cooperation-btn {
  display: inline-flex;
}
.mobile-nav a.nav-cta {
  display: inline-block;
  width: fit-content;
  margin-top: 0.25rem;
  border-bottom: none;
  padding: 0.55rem 1.1rem;
  border-radius: 999px;
  text-align: center;
}
@media (max-width: 640px) {
  .contact-cooperation {
    padding: 0 1.25rem 3rem;
  }
  .contact-grid + .contact-cooperation {
    padding-top: 2.5rem;
  }
  .contact-grid:has(+ .contact-cooperation) {
    padding-bottom: 1.5rem;
  }
  .contact-cooperation-inner {
    padding: 1.35rem 1.15rem;
  }
  .contact-cooperation-title {
    font-size: 1.15rem;
  }
}