* { margin: 0; padding: 0; box-sizing: border-box; }
    :root {
      --radius-pill: 999px;
      --radius-sm: 10px;
      --radius-md: 14px;
      --radius-lg: 18px;
      --radius-xl: 24px;
      --shadow-soft: 0 12px 30px rgba(15, 23, 42, 0.18);
      --shadow-float: 0 20px 50px rgba(15, 23, 42, 0.24);
      --shadow-neon-blue: 0 0 32px rgba(59, 130, 246, 0.08);
      --shadow-neon-purple: 0 0 32px rgba(168, 85, 247, 0.08);
    }
    body {
      font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'PingFang SC', 'Microsoft YaHei', sans-serif;
      background: #0a0a0f;
      color: #e2e8f0;
      line-height: 1.6;
      overflow-x: hidden;
    }
    html {
      scroll-behavior: smooth;
    }

    .icp-records {
      margin-top: 12px;
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 10px 18px;
      color: #64748b;
      font-size: 13px;
    }
    .icp-records a {
      color: #64748b;
      text-decoration: none;
      transition: color 0.3s;
    }
    .icp-records a:hover {
      color: #94a3b8;
    }
    .icp-records .police-record {
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }
    .police-record img {
      width: 16px;
      height: 16px;
      object-fit: contain;
    }

    /* Hero */
    .hero {
      min-height: 100vh;
      display: flex;
      align-items: center;
      justify-content: center;
      text-align: center;
      padding: 120px 24px 80px;
      position: relative;
      overflow: hidden;
    }
    .hero-bg {
      position: absolute;
      inset: 0;
      background:
        radial-gradient(ellipse 80% 50% at 50% -20%, rgba(59, 130, 246, 0.15), transparent),
        radial-gradient(ellipse 60% 40% at 80% 60%, rgba(139, 92, 246, 0.1), transparent);
      overflow: hidden;
    }
    .hero-orbit,
    .hero-orbit-secondary,
    .hero-beam {
      position: absolute;
      pointer-events: none;
    }
    .hero-orbit {
      width: 760px;
      height: 760px;
      left: 50%;
      top: 50%;
      transform: translate(-50%, -46%);
      border-radius: 50%;
      border: 1px solid rgba(96, 165, 250, 0.12);
      box-shadow: inset 0 0 80px rgba(59, 130, 246, 0.06);
      opacity: 0.9;
    }
    .hero-orbit::before,
    .hero-orbit::after,
    .hero-orbit-secondary::before,
    .hero-orbit-secondary::after {
      content: "";
      position: absolute;
      border-radius: 50%;
      pointer-events: none;
    }
    .hero-orbit::before {
      inset: 72px;
      border: 1px dashed rgba(167, 139, 250, 0.2);
      animation: heroSpin 28s linear infinite;
    }
    .hero-orbit::after {
      width: 14px;
      height: 14px;
      top: 136px;
      left: 118px;
      background: radial-gradient(circle, rgba(96, 165, 250, 0.95) 0, rgba(96, 165, 250, 0.2) 55%, transparent 72%);
      box-shadow: 0 0 24px rgba(96, 165, 250, 0.7);
      animation: heroParticle 18s linear infinite;
    }
    .hero-orbit-secondary {
      width: 520px;
      height: 520px;
      left: 50%;
      top: 50%;
      transform: translate(-50%, -42%) rotate(18deg);
      border-radius: 50%;
      border: 1px solid rgba(34, 211, 238, 0.08);
      opacity: 0.9;
    }
    .hero-orbit-secondary::before {
      inset: 56px;
      border: 1px solid rgba(34, 211, 238, 0.12);
      animation: heroSpinReverse 24s linear infinite;
    }
    .hero-orbit-secondary::after {
      width: 12px;
      height: 12px;
      right: 92px;
      bottom: 118px;
      background: radial-gradient(circle, rgba(168, 85, 247, 0.92) 0, rgba(168, 85, 247, 0.18) 58%, transparent 74%);
      box-shadow: 0 0 22px rgba(168, 85, 247, 0.7);
      animation: heroParticleReverse 14s linear infinite;
    }
    .hero-beam {
      width: 780px;
      height: 320px;
      left: 50%;
      top: 42%;
      transform: translateX(-50%);
      background: linear-gradient(90deg, transparent, rgba(59, 130, 246, 0.16), rgba(168, 85, 247, 0.18), transparent);
      filter: blur(56px);
      opacity: 0.85;
      animation: heroBeamPulse 8s ease-in-out infinite;
    }
    .hero-bg::before,
    .hero-bg::after {
      content: "";
      position: absolute;
      inset: -20%;
      pointer-events: none;
    }
    .hero-bg::before {
      background:
        linear-gradient(rgba(59, 130, 246, 0.08) 1px, transparent 1px),
        linear-gradient(90deg, rgba(59, 130, 246, 0.08) 1px, transparent 1px);
      background-size: 64px 64px;
      mask-image: radial-gradient(circle at center, rgba(0, 0, 0, 0.85), transparent 78%);
      transform: perspective(900px) rotateX(72deg) translateY(22%);
      transform-origin: center center;
      opacity: 0.45;
    }
    .hero-bg::after {
      background:
        radial-gradient(circle at 20% 30%, rgba(96, 165, 250, 0.22) 0, transparent 18%),
        radial-gradient(circle at 78% 22%, rgba(168, 85, 247, 0.2) 0, transparent 20%),
        radial-gradient(circle at 65% 72%, rgba(34, 211, 238, 0.16) 0, transparent 16%);
      filter: blur(20px);
      animation: heroGlowFloat 16s ease-in-out infinite alternate;
      opacity: 0.9;
    }
    .hero-content { position: relative; z-index: 1; max-width: 900px; }
    .hero-badge {
      display: inline-block;
      padding: 6px 16px;
      background: rgba(59, 130, 246, 0.1);
      border: 1px solid rgba(59, 130, 246, 0.3);
      border-radius: var(--radius-pill);
      font-size: 13px;
      color: #60a5fa;
      margin-bottom: 24px;
    }
    .hero h1 {
      font-size: 56px;
      font-weight: 800;
      line-height: 1.15;
      margin-bottom: 20px;
      background: linear-gradient(135deg, #f8fafc 0%, #94a3b8 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero h1 span {
      background: linear-gradient(135deg, #3b82f6, #8b5cf6);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-brand {
      display: inline-block;
      margin-right: 14px;
      color: #f8fafc;
      -webkit-text-fill-color: #f8fafc;
      background: none;
      letter-spacing: 0.01em;
    }
    .hero-subtitle {
      font-size: 20px;
      color: #94a3b8;
      margin-bottom: 40px;
      max-width: 760px;
      margin-left: auto;
      margin-right: auto;
      line-height: 1.9;
      text-shadow: 0 0 24px rgba(15, 23, 42, 0.28);
    }
    .hero-cta {
      display: flex;
      gap: 16px;
      justify-content: center;
      margin-bottom: 24px;
    }
    .btn-primary {
      background: linear-gradient(135deg, #3b82f6, #8b5cf6);
      color: white;
      padding: 14px 36px;
      border-radius: var(--radius-sm);
      text-decoration: none;
      font-size: 16px;
      font-weight: 600;
      transition: all 0.3s;
      border: none;
      cursor: pointer;
    }
    .btn-primary:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 30px rgba(59, 130, 246, 0.4);
    }
    .btn-hero-secondary {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 11px 20px;
      border-radius: var(--radius-sm);
      border: 1px solid rgba(148, 163, 184, 0.24);
      background: rgba(15, 23, 42, 0.42);
      color: #cbd5e1;
      text-decoration: none;
      font-size: 14px;
      font-weight: 500;
      transition: all 0.3s;
      backdrop-filter: blur(12px);
    }
    .btn-hero-secondary:hover {
      transform: translateY(-2px);
      border-color: rgba(96, 165, 250, 0.42);
      color: #f8fafc;
      background: rgba(15, 23, 42, 0.68);
      box-shadow: 0 10px 26px rgba(15, 23, 42, 0.24);
    }
    @keyframes heroGlowFloat {
      0% {
        transform: translate3d(-2%, -1%, 0) scale(1);
      }
      100% {
        transform: translate3d(3%, 2%, 0) scale(1.06);
      }
    }
    @keyframes heroSpin {
      from { transform: rotate(0deg); }
      to { transform: rotate(360deg); }
    }
    @keyframes heroSpinReverse {
      from { transform: rotate(360deg); }
      to { transform: rotate(0deg); }
    }
    @keyframes heroBeamPulse {
      0%, 100% { opacity: 0.55; transform: translateX(-50%) scaleX(0.94); }
      50% { opacity: 0.92; transform: translateX(-50%) scaleX(1.03); }
    }
    @keyframes heroParticle {
      0% { transform: rotate(0deg) translateX(246px) rotate(0deg); }
      100% { transform: rotate(360deg) translateX(246px) rotate(-360deg); }
    }
    @keyframes heroParticleReverse {
      0% { transform: rotate(360deg) translateX(170px) rotate(-360deg); }
      100% { transform: rotate(0deg) translateX(170px) rotate(0deg); }
    }
    .label-icon {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-width: 32px;
      height: 28px;
      padding: 0 8px;
      border-radius: var(--radius-pill);
      background: linear-gradient(135deg, rgba(59,130,246,0.2), rgba(139,92,246,0.2));
      border: 1px solid rgba(99, 102, 241, 0.25);
      color: #cbd5e1;
      font-size: 18px;
      font-weight: 600;
      letter-spacing: 0;
      flex-shrink: 0;
    }
    /* 优势区域 */
    .section {
      padding: 100px 24px;
      max-width: 1200px;
      margin: 0 auto;
      position: relative;
    }
    .section::before {
      content: "";
      position: absolute;
      top: -1px;
      left: 50%;
      transform: translateX(-50%);
      width: min(220px, 48vw);
      height: 1px;
      background: linear-gradient(90deg, transparent, rgba(59,130,246,0.45), rgba(168,85,247,0.35), transparent);
      opacity: 0.75;
      pointer-events: none;
    }
    .section-title {
      text-align: center;
      margin-bottom: 60px;
    }
    .section-title h2 {
      font-size: 36px;
      font-weight: 700;
      margin-bottom: 12px;
      background: linear-gradient(135deg, #f8fafc, #94a3b8);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .section-title p {
      color: #64748b;
      font-size: 16px;
    }

    .advantages {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
    }
    .advantage-card {
      background: rgba(255,255,255,0.03);
      border: 1px solid rgba(255,255,255,0.06);
      border-radius: var(--radius-md);
      padding: 32px 24px;
      text-align: center;
      transition: all 0.3s;
    }
    .advantage-card:hover {
      background: rgba(255,255,255,0.05);
      border-color: rgba(59, 130, 246, 0.3);
      transform: translateY(-4px);
    }
    .advantage-icon {
      width: 56px;
      height: 56px;
      margin: 0 auto 20px;
      background: linear-gradient(135deg, rgba(59,130,246,0.2), rgba(139,92,246,0.2));
      border-radius: var(--radius-sm);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #dbeafe;
      font-size: 24px;
      font-weight: 500;
      letter-spacing: 0;
    }
    .advantage-card h3 {
      font-size: 18px;
      font-weight: 600;
      margin-bottom: 10px;
      color: #f1f5f9;
    }
    .advantage-card p {
      font-size: 14px;
      color: #64748b;
      line-height: 1.6;
    }
    .advantage-tag {
      display: inline-block;
      margin-top: 12px;
      padding: 4px 10px;
      background: rgba(34, 197, 94, 0.1);
      color: #4ade80;
      border-radius: var(--radius-pill);
      font-size: 12px;
      font-weight: 500;
    }

    .product-matrix {
      padding-top: 80px;
      padding-bottom: 80px;
    }
    .product-matrix-grid {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 24px;
    }
    .product-card {
      display: flex;
      flex-direction: column;
      min-height: 260px;
      padding: 34px;
      border: 1px solid rgba(255,255,255,0.07);
      border-radius: var(--radius-lg);
      background: rgba(255,255,255,0.035);
      text-decoration: none;
      overflow: hidden;
      position: relative;
      transition: transform 0.35s ease, border-color 0.35s ease, background 0.35s ease, box-shadow 0.35s ease;
    }
    .product-card::before {
      content: "";
      position: absolute;
      inset: auto -12% -42% 42%;
      height: 220px;
      border-radius: 999px;
      background: radial-gradient(circle, rgba(59,130,246,0.18), transparent 68%);
      pointer-events: none;
    }
    .product-card-primary::before {
      background: radial-gradient(circle, rgba(139,92,246,0.2), transparent 68%);
    }
    .product-card-game::before {
      background: radial-gradient(circle, rgba(34,211,238,0.18), transparent 68%);
    }
    .product-card:hover {
      transform: translateY(-4px);
      border-color: rgba(96, 165, 250, 0.3);
      background: rgba(255,255,255,0.055);
      box-shadow: var(--shadow-float), var(--shadow-neon-blue);
    }
    .product-card-kicker {
      width: fit-content;
      padding: 5px 12px;
      border-radius: var(--radius-pill);
      background: rgba(59,130,246,0.12);
      border: 1px solid rgba(59,130,246,0.2);
      color: #93c5fd;
      font-size: 12px;
      font-weight: 700;
      margin-bottom: 18px;
      position: relative;
    }
    .product-card h3 {
      color: #f8fafc;
      font-size: 28px;
      line-height: 1.2;
      margin-bottom: 14px;
      position: relative;
    }
    .product-card p {
      color: #94a3b8;
      font-size: 15px;
      line-height: 1.8;
      max-width: 520px;
      position: relative;
    }
    .product-card span {
      margin-top: auto;
      color: #cbd5e1;
      font-size: 14px;
      font-weight: 700;
      position: relative;
    }

    /* 功能展示 */
    .features {
      background: rgba(255,255,255,0.02);
      border-top: 1px solid rgba(255,255,255,0.05);
      border-bottom: 1px solid rgba(255,255,255,0.05);
    }
    .feature-row {
      display: grid;
      grid-template-columns: 1fr 1fr;
      gap: 48px;
      align-items: center;
      margin-bottom: 80px;
      position: relative;
    }
    .feature-row:last-child { margin-bottom: 0; }
    .feature-row.reverse {
      direction: rtl;
    }
    .feature-row.reverse > * {
      direction: ltr;
    }
    .feature-text {
      position: relative;
      z-index: 1;
      background: rgba(255,255,255,0.03);
      border: 1px solid rgba(255,255,255,0.06);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-soft);
      transition: transform 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease;
    }
    .feature-row:hover .feature-text {
      transform: translateY(-4px);
      border-color: rgba(59, 130, 246, 0.16);
      box-shadow: var(--shadow-float), var(--shadow-neon-blue);
    }
    .feature-row.reverse:hover .feature-text {
      border-color: rgba(168, 85, 247, 0.18);
      box-shadow: var(--shadow-float), var(--shadow-neon-purple);
    }
    .feature-image {
      position: relative;
      z-index: 1;
      border-radius: 16px;
      overflow: hidden;
      box-shadow: 0 20px 60px rgba(0,0,0,0.5), 0 0 0 1px rgba(255,255,255,0.06);
      border: 1px solid rgba(255,255,255,0.08);
    }
    .feature-image img {
      width: 100%;
      height: auto;
      display: block;
      transition: transform 0.3s ease;
    }
    .feature-image-clickable {
      cursor: pointer;
    }
    .feature-image-clickable:hover img {
      transform: scale(1.02);
    }
    .feature-image-zoom-hint {
      position: absolute;
      bottom: 12px;
      right: 12px;
      padding: 5px 10px;
      border-radius: 6px;
      background: rgba(0,0,0,0.6);
      backdrop-filter: blur(8px);
      color: #cbd5e1;
      font-size: 12px;
      opacity: 0;
      transition: opacity 0.3s ease;
      pointer-events: none;
    }
    .feature-image-clickable:hover .feature-image-zoom-hint {
      opacity: 1;
    }

    /* Lightbox */
    .lightbox-overlay {
      position: fixed;
      inset: 0;
      z-index: 9999;
      background: rgba(0,0,0,0.92);
      backdrop-filter: blur(12px);
      display: flex;
      align-items: center;
      justify-content: center;
      opacity: 0;
      pointer-events: none;
      transition: opacity 0.3s ease;
    }
    .lightbox-overlay.is-open {
      opacity: 1;
      pointer-events: auto;
    }
    .lightbox-content {
      max-width: 92vw;
      max-height: 90vh;
      position: relative;
      transform: scale(0.95);
      transition: transform 0.3s ease;
    }
    .lightbox-overlay.is-open .lightbox-content {
      transform: scale(1);
    }
    .lightbox-content img {
      max-width: 100%;
      max-height: 90vh;
      display: block;
      border-radius: 12px;
      box-shadow: 0 30px 80px rgba(0,0,0,0.6);
    }
    .lightbox-close {
      position: absolute;
      top: -16px;
      right: -16px;
      width: 40px;
      height: 40px;
      border-radius: 50%;
      border: none;
      background: rgba(30, 41, 59, 0.85);
      backdrop-filter: blur(8px);
      color: #e2e8f0;
      cursor: pointer;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 0;
      box-shadow: 0 4px 16px rgba(0,0,0,0.3);
      transition: background 0.2s, color 0.2s, transform 0.25s ease;
    }
    .lightbox-close:hover {
      background: rgba(51, 65, 85, 0.95);
      color: #fff;
      transform: rotate(90deg);
    }
    .lightbox-close svg {
      width: 18px;
      height: 18px;
    }
    .feature-text h3 {
      display: flex;
      align-items: center;
      gap: 12px;
      font-size: 28px;
      font-weight: 700;
      margin-bottom: 16px;
      color: #f1f5f9;
    }
    .feature-text p {
      color: #64748b;
      font-size: 16px;
      margin-bottom: 20px;
    }
    .feature-list {
      list-style: none;
    }
    .feature-list li {
      padding: 6px 0;
      color: #94a3b8;
      font-size: 14px;
      display: flex;
      align-items: center;
      gap: 8px;
    }
    .feature-list li::before {
      content: "";
      width: 6px;
      height: 6px;
      background: linear-gradient(135deg, #3b82f6, #8b5cf6);
      border-radius: 50%;
      flex-shrink: 0;
    }
    /* 技术栈 */
    .tech-panel {
      position: relative;
      overflow: hidden;
      padding: 36px;
      border-radius: var(--radius-xl);
      background: linear-gradient(180deg, rgba(255,255,255,0.04), rgba(255,255,255,0.02));
      border: 1px solid rgba(255,255,255,0.08);
      box-shadow: 0 24px 70px rgba(2, 6, 23, 0.28);
    }
    .tech-panel::before {
      content: "";
      position: absolute;
      inset: -20% auto auto -10%;
      width: 320px;
      height: 320px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(59,130,246,0.18) 0, transparent 70%);
      filter: blur(18px);
      pointer-events: none;
    }
    .tech-panel::after {
      content: "";
      position: absolute;
      right: -80px;
      bottom: -120px;
      width: 320px;
      height: 320px;
      border-radius: 50%;
      background: radial-gradient(circle, rgba(168,85,247,0.14) 0, transparent 72%);
      filter: blur(20px);
      pointer-events: none;
    }
    .tech-overview {
      position: relative;
      z-index: 1;
      max-width: 780px;
      margin: 0 auto 28px;
      text-align: center;
      color: #94a3b8;
      font-size: 15px;
      line-height: 1.85;
    }
    .tech-stack {
      position: relative;
      z-index: 1;
      display: flex;
      justify-content: center;
      gap: 18px;
      flex-wrap: wrap;
      margin-top: 0;
    }
    .tech-item {
      display: flex;
      align-items: center;
      gap: 12px;
      padding: 16px 22px;
      min-width: 180px;
      justify-content: flex-start;
      background: rgba(255,255,255,0.035);
      border: 1px solid rgba(255,255,255,0.08);
      border-radius: var(--radius-md);
      transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease, background 0.3s ease;
    }
    .tech-item:hover {
      transform: translateY(-4px);
      background: rgba(255,255,255,0.05);
      border-color: rgba(59,130,246,0.22);
      box-shadow: 0 14px 34px rgba(59,130,246,0.08);
    }
    .tech-item span:first-child {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      min-width: 44px;
      height: 32px;
      padding: 0 10px;
      border-radius: 999px;
      background: rgba(59,130,246,0.12);
      border: 1px solid rgba(59,130,246,0.2);
      color: #bfdbfe;
      font-size: 20px;
      font-weight: 500;
      letter-spacing: 0;
    }
    .tech-item span:last-child {
      font-size: 15px;
      font-weight: 600;
      color: #e2e8f0;
    }
    .tech-note {
      position: relative;
      z-index: 1;
      max-width: 860px;
      margin: 28px auto 0;
      text-align: center;
      color: #64748b;
      font-size: 14px;
      line-height: 1.9;
    }

    /* FAQ */
    .faq-list {
      max-width: 800px;
      margin: 0 auto;
    }
    .faq-item {
      background: rgba(255,255,255,0.03);
      border: 1px solid rgba(255,255,255,0.06);
      border-radius: var(--radius-sm);
      margin-bottom: 12px;
      overflow: hidden;
      transition: border-color 0.3s ease, box-shadow 0.3s ease, background 0.3s ease;
    }
    .faq-item.is-open {
      background: rgba(255,255,255,0.045);
      border-color: rgba(59, 130, 246, 0.22);
      box-shadow: 0 12px 30px rgba(59, 130, 246, 0.08);
    }
    .faq-question {
      padding: 20px 24px;
      font-weight: 600;
      color: #e2e8f0;
      cursor: pointer;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }
    .faq-question span:last-child {
      color: #94a3b8;
      transition: transform 0.3s ease, color 0.3s ease;
    }
    .faq-item.is-open .faq-question span:last-child {
      color: #60a5fa;
      transform: rotate(180deg);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      padding: 0 24px;
      color: #64748b;
      font-size: 14px;
      line-height: 1.7;
      opacity: 0;
      transition: max-height 0.35s ease, opacity 0.25s ease, padding 0.35s ease;
    }
    .faq-item.is-open .faq-answer {
      max-height: 240px;
      padding: 0 24px 20px;
      opacity: 1;
    }

    /* 使用流程 */
    .steps-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 24px;
      position: relative;
    }
    .steps-grid::before {
      content: "";
      position: absolute;
      top: 48px;
      left: 12.5%;
      right: 12.5%;
      height: 2px;
      background: linear-gradient(90deg, transparent, rgba(59,130,246,0.3), rgba(168,85,247,0.3), transparent);
      z-index: 0;
    }
    .step-card {
      position: relative;
      z-index: 1;
      text-align: center;
      padding: 0 12px;
      opacity: 0;
      transform: translateY(24px);
      transition: opacity 0.5s ease, transform 0.5s ease;
    }
    .step-card.is-visible {
      opacity: 1;
      transform: translateY(0);
    }
    .step-number {
      width: 56px;
      height: 56px;
      margin: 0 auto 20px;
      border-radius: 50%;
      background: linear-gradient(135deg, #3b82f6, #8b5cf6);
      display: flex;
      align-items: center;
      justify-content: center;
      color: #fff;
      font-size: 22px;
      font-weight: 700;
      box-shadow: 0 8px 24px rgba(59,130,246,0.25);
    }
    .step-card h3 {
      font-size: 17px;
      font-weight: 600;
      margin-bottom: 8px;
      color: #f1f5f9;
    }
    .step-card p {
      font-size: 14px;
      color: #64748b;
      line-height: 1.6;
    }

    /* 适用场景 */
    .usecases-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 24px;
    }
    .usecase-card {
      background: rgba(255,255,255,0.03);
      border: 1px solid rgba(255,255,255,0.06);
      border-radius: var(--radius-md);
      padding: 32px 24px;
      position: relative;
      overflow: hidden;
      opacity: 0;
      transform: translateY(30px);
      transition: opacity 0.6s ease, transform 0.6s ease, border-color 0.3s, background 0.3s;
    }
    .usecase-card.is-visible {
      opacity: 1;
      transform: translateY(0);
    }
    .usecase-card:hover {
      border-color: rgba(59,130,246,0.2);
      background: rgba(255,255,255,0.05);
    }
    .usecase-card::before {
      content: "";
      position: absolute;
      inset: 0;
      background: linear-gradient(135deg, rgba(59,130,246,0.06), rgba(168,85,247,0.04));
      opacity: 0;
      transition: opacity 0.3s;
    }
    .usecase-card:hover::before { opacity: 1; }
    .usecase-icon {
      font-size: 32px;
      margin-bottom: 16px;
    }
    .usecase-card h3 {
      font-size: 18px;
      font-weight: 600;
      margin-bottom: 10px;
      color: #f1f5f9;
      position: relative;
    }
    .usecase-card p {
      font-size: 14px;
      color: #64748b;
      line-height: 1.6;
      position: relative;
    }

    /* 首页文章列表 */
    .home-article-list {
      display: grid;
      grid-template-columns: repeat(3, minmax(0, 1fr));
      gap: 24px;
    }
    .home-article-card {
      display: flex;
      flex-direction: column;
      gap: 14px;
      padding: 28px 24px;
      border-radius: var(--radius-lg);
      border: 1px solid rgba(255,255,255,0.06);
      background: rgba(255,255,255,0.03);
      box-shadow: var(--shadow-soft);
      text-decoration: none;
      transition: transform 0.35s ease, border-color 0.35s ease, box-shadow 0.35s ease, background 0.35s ease;
    }
    .home-article-card:hover {
      transform: translateY(-4px);
      background: rgba(255,255,255,0.05);
      border-color: rgba(59, 130, 246, 0.2);
      box-shadow: var(--shadow-float), var(--shadow-neon-blue);
    }
    .home-article-meta {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      align-items: center;
    }
    .home-article-tag {
      padding: 4px 10px;
      border-radius: var(--radius-pill);
      background: rgba(59,130,246,0.1);
      color: #60a5fa;
      font-size: 12px;
      font-weight: 500;
    }
    .home-article-date {
      color: #64748b;
      font-size: 13px;
    }
    .home-article-card h3 {
      color: #f1f5f9;
      font-size: 22px;
      line-height: 1.45;
      font-weight: 700;
    }
    .home-article-card p {
      color: #94a3b8;
      font-size: 15px;
      line-height: 1.8;
      flex: 1;
    }
    .home-article-link {
      color: #cbd5e1;
      font-size: 14px;
      font-weight: 600;
    }

    /* CTA 区域 */
    .cta-section {
      padding: 80px 24px;
      text-align: center;
      background: linear-gradient(180deg, rgba(59,130,246,0.06), rgba(168,85,247,0.08));
      border-top: 1px solid rgba(255,255,255,0.04);
      border-bottom: 1px solid rgba(255,255,255,0.04);
    }
    .cta-section h2 {
      font-size: 32px;
      font-weight: 700;
      margin-bottom: 12px;
      background: linear-gradient(135deg, #f8fafc, #94a3b8);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .cta-section p {
      color: #64748b;
      font-size: 16px;
      margin-bottom: 32px;
    }
    .cta-buttons {
      display: flex;
      gap: 16px;
      justify-content: center;
      flex-wrap: wrap;
    }
    .btn-preview {
      background: linear-gradient(135deg, #3b82f6, #8b5cf6);
      color: #fff;
      padding: 14px 36px;
      border-radius: var(--radius-sm);
      text-decoration: none;
      font-size: 16px;
      font-weight: 600;
      text-shadow: 0 1px 2px rgba(0,0,0,0.2);
      transition: all 0.3s;
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .btn-preview:hover {
      transform: translateY(-2px);
      box-shadow: 0 8px 30px rgba(59, 130, 246, 0.4);
    }
    .btn-secondary {
      background: rgba(255,255,255,0.05);
      border: 1px solid rgba(255,255,255,0.1);
      color: #e2e8f0;
      padding: 14px 36px;
      border-radius: var(--radius-sm);
      text-decoration: none;
      font-size: 16px;
      font-weight: 600;
      transition: all 0.3s;
      display: inline-flex;
      align-items: center;
      gap: 8px;
    }
    .btn-secondary:hover {
      background: rgba(255,255,255,0.1);
      border-color: rgba(255,255,255,0.2);
      transform: translateY(-2px);
    }

    /* Footer */
    .footer {
      border-top: 1px solid rgba(255,255,255,0.05);
      padding: 40px 24px;
      text-align: center;
      color: #475569;
      font-size: 13px;
    }
    .footer-links {
      display: flex;
      justify-content: center;
      gap: 24px;
      margin-bottom: 16px;
    }
    .footer-links a {
      color: #64748b;
      text-decoration: none;
      font-size: 14px;
    }
    .footer-links a:hover { color: #94a3b8; }

    .back-to-top {
      position: fixed;
      right: 28px;
      bottom: 28px;
      z-index: 90;
      width: 58px;
      height: 58px;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      gap: 2px;
      border: 1px solid rgba(96, 165, 250, 0.36);
      border-radius: 18px;
      background:
        linear-gradient(135deg, rgba(59, 130, 246, 0.9), rgba(139, 92, 246, 0.88)),
        rgba(15, 23, 42, 0.84);
      color: #f8fafc;
      box-shadow: 0 18px 45px rgba(15, 23, 42, 0.45), 0 0 28px rgba(59, 130, 246, 0.22);
      cursor: pointer;
      opacity: 0;
      visibility: hidden;
      transform: translateY(16px) scale(0.92);
      transition: opacity 0.28s ease, visibility 0.28s ease, transform 0.28s ease, box-shadow 0.28s ease, border-color 0.28s ease;
      backdrop-filter: blur(14px);
    }
    .back-to-top::before {
      content: "";
      position: absolute;
      inset: 1px;
      border-radius: 16px;
      border: 1px solid rgba(255, 255, 255, 0.12);
      pointer-events: none;
    }
    .back-to-top.is-visible {
      opacity: 1;
      visibility: visible;
      transform: translateY(0) scale(1);
    }
    .back-to-top:hover {
      border-color: rgba(125, 211, 252, 0.72);
      box-shadow: 0 22px 54px rgba(15, 23, 42, 0.5), 0 0 34px rgba(96, 165, 250, 0.36);
      transform: translateY(-3px) scale(1.02);
    }
    .back-to-top:focus-visible {
      outline: 3px solid rgba(125, 211, 252, 0.38);
      outline-offset: 4px;
    }
    .back-to-top__arrow {
      font-size: 24px;
      line-height: 1;
      font-weight: 800;
    }
    .back-to-top__text {
      font-size: 10px;
      line-height: 1;
      font-weight: 800;
      letter-spacing: 0.08em;
    }

    }
    /* 响应式 */
    @media (max-width: 1024px) {
      .advantages { grid-template-columns: repeat(2, 1fr); }
      .hero h1 { font-size: 40px; }
      .hero-orbit { width: 620px; height: 620px; }
      .hero-orbit-secondary { width: 440px; height: 440px; }
      .hero-beam { width: 620px; }
      .tech-item { min-width: 220px; }
      .stats-grid { grid-template-columns: repeat(2, 1fr); }
      .steps-grid { grid-template-columns: repeat(2, 1fr); }
      .steps-grid::before { display: none; }
      .usecases-grid { grid-template-columns: repeat(2, 1fr); }
      .product-matrix-grid { grid-template-columns: 1fr; }
    }
    @media (max-width: 640px) {
      .advantages { grid-template-columns: 1fr; }
      .hero h1 { font-size: 32px; }
      .navbar,
      .navbar.is-scrolled { padding: 12px 20px; }
      .hero-cta { flex-direction: column; align-items: center; }
      .btn-primary { width: 100%; max-width: 280px; }
      .btn-hero-secondary { width: 100%; max-width: 280px; }
      .nav-logo svg { width: 28px; height: 28px; }
      .nav-logo span { font-size: 16px; }
      .hero-brand { display: block; margin-right: 0; margin-bottom: 8px; }
      .hero-subtitle { font-size: 17px; max-width: 100%; }
      .hero-orbit { width: 440px; height: 440px; transform: translate(-50%, -44%); }
      .hero-orbit-secondary { width: 320px; height: 320px; transform: translate(-50%, -40%) rotate(18deg); }
      .hero-beam { width: 360px; height: 220px; top: 44%; }
      .tech-panel { padding: 24px 18px; border-radius: 18px; }
      .tech-item { width: 100%; min-width: 0; }
      .feature-row::before { inset: 18px 0 auto; height: 120px; }
      .feature-row { grid-template-columns: 1fr; gap: 28px; }
      .feature-row.reverse { direction: ltr; }
      .product-card { min-height: 0; padding: 26px 22px; }
      .product-card h3 { font-size: 24px; }
      .back-to-top {
        right: 16px;
        bottom: 16px;
        width: 50px;
        height: 50px;
        border-radius: 16px;
      }
      .back-to-top__arrow { font-size: 22px; }
      .back-to-top__text { font-size: 9px; }
      .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 24px; }
      .stat-item h3 { font-size: 32px; }
      .steps-grid { grid-template-columns: 1fr; }
      .usecases-grid { grid-template-columns: 1fr; }
      .home-article-list { grid-template-columns: 1fr; }
      .home-article-card { width: 100%; flex-basis: 100%; }
      .home-article-card h3 { font-size: 20px; }
      .cta-section h2 { font-size: 24px; }
      .cta-buttons { flex-direction: column; align-items: center; }
      .btn-preview, .btn-secondary { width: 100%; max-width: 280px; justify-content: center; }
    }