:root {
      --bg-base: #f6f8fd;
      --bg-surface: #ffffff;
      --bg-card: rgba(255, 255, 255, 0.85);
      --text-main: #141b2d;
      --text-muted: #5e6d82;
      --text-light: #8e9bb0;
      --primary: #4f46e5;
      --primary-hover: #4338ca;
      --accent-laser-1: #8b5cf6;
      --accent-laser-2: #06b6d4;
      --accent-laser-3: #ec4899;
      --gradient-laser: linear-gradient(135deg, #6366f1 0%, #a855f7 50%, #06b6d4 100%);
      --gradient-subtle: linear-gradient(135deg, rgba(238, 242, 255, 0.7) 0%, rgba(245, 243, 255, 0.7) 50%, rgba(236, 254, 255, 0.7) 100%);
      --gradient-iridescent: linear-gradient(120deg, rgba(168, 85, 247, 0.08) 0%, rgba(6, 182, 212, 0.08) 50%, rgba(236, 72, 153, 0.08) 100%);
      --border-color: rgba(203, 213, 225, 0.7);
      --border-laser: rgba(168, 85, 247, 0.3);
      --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.04);
      --shadow-md: 0 8px 24px rgba(15, 23, 42, 0.06);
      --shadow-lg: 0 16px 36px rgba(79, 70, 229, 0.1);
      --shadow-laser: 0 10px 30px rgba(168, 85, 247, 0.15);
      --radius-sm: 8px;
      --radius-md: 14px;
      --radius-lg: 20px;
      --radius-full: 9999px;
      --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    }

    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
      -webkit-tap-highlight-color: transparent;
    }

    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }

    body {
      font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "WenQuanYi Micro Hei", sans-serif;
      background-color: var(--bg-base);
      background-image: 
        radial-gradient(at 0% 0%, rgba(99, 102, 241, 0.08) 0px, transparent 50%),
        radial-gradient(at 100% 0%, rgba(6, 182, 212, 0.08) 0px, transparent 50%),
        radial-gradient(at 50% 50%, rgba(236, 72, 153, 0.05) 0px, transparent 50%),
        radial-gradient(at 100% 100%, rgba(139, 92, 246, 0.08) 0px, transparent 50%),
        radial-gradient(at 0% 100%, rgba(14, 165, 233, 0.08) 0px, transparent 50%);
      background-attachment: fixed;
      color: var(--text-main);
      line-height: 1.65;
      overflow-x: hidden;
      width: 100%;
    }

    a {
      color: inherit;
      text-decoration: none;
      transition: var(--transition);
    }

    /* Container System */
    .container {
      width: 100%;
      max-width: 1240px;
      margin-left: auto;
      margin-right: auto;
      padding-left: 20px;
      padding-right: 20px;
    }

    /* Typography & Sections */
    .section {
      padding: 70px 0;
      position: relative;
    }

    .section-header {
      text-align: center;
      max-width: 780px;
      margin: 0 auto 48px;
    }

    .section-tag {
      display: inline-flex;
      align-items: center;
      gap: 6px;
      padding: 6px 16px;
      background: var(--gradient-subtle);
      border: 1px solid var(--border-laser);
      border-radius: var(--radius-full);
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--primary);
      margin-bottom: 12px;
      box-shadow: 0 2px 10px rgba(168, 85, 247, 0.1);
    }

    .section-title {
      font-size: 2.1rem;
      font-weight: 800;
      color: var(--text-main);
      margin-bottom: 12px;
      letter-spacing: -0.02em;
    }

    .section-desc {
      font-size: 1.05rem;
      color: var(--text-muted);
      line-height: 1.6;
    }

    /* Laser Iridescent Utilities */
    .laser-border {
      position: relative;
      border: 1px solid transparent;
      background-clip: padding-box;
    }
    .laser-border::before {
      content: '';
      position: absolute;
      top: -1px; right: -1px; bottom: -1px; left: -1px;
      z-index: -1;
      margin: 0;
      border-radius: inherit;
      background: linear-gradient(135deg, rgba(99, 102, 241, 0.4), rgba(236, 72, 153, 0.3), rgba(6, 182, 212, 0.4));
    }

    .laser-card {
      background: var(--bg-card);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
      display: flex;
      flex-direction: column;
    }
    .laser-card:hover {
      transform: translateY(-4px);
      box-shadow: var(--shadow-laser);
      border-color: rgba(168, 85, 247, 0.5);
    }

    .laser-btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      gap: 8px;
      padding: 12px 28px;
      font-size: 0.95rem;
      font-weight: 600;
      border-radius: var(--radius-full);
      cursor: pointer;
      border: none;
      transition: var(--transition);
      text-align: center;
    }
    .laser-btn-primary {
      background: var(--gradient-laser);
      color: #ffffff;
      box-shadow: 0 6px 20px rgba(99, 102, 241, 0.35);
    }
    .laser-btn-primary:hover {
      box-shadow: 0 8px 25px rgba(168, 85, 247, 0.5);
      transform: translateY(-2px);
      color: #ffffff;
    }
    .laser-btn-secondary {
      background: #ffffff;
      color: var(--text-main);
      border: 1px solid var(--border-color);
      box-shadow: var(--shadow-sm);
    }
    .laser-btn-secondary:hover {
      border-color: var(--primary);
      color: var(--primary);
      background: #f8fafc;
      transform: translateY(-2px);
    }

    /* Header & Navigation */
    .site-header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.88);
      backdrop-filter: blur(16px);
      -webkit-backdrop-filter: blur(16px);
      border-bottom: 1px solid rgba(226, 232, 240, 0.8);
      box-shadow: 0 2px 12px rgba(15, 23, 42, 0.03);
    }
    .nav-container {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-group {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .brand-logo-wrap {
      width: 42px;
      height: 42px;
      display: flex;
      align-items: center;
      justify-content: center;
      border-radius: var(--radius-sm);
      overflow: hidden;
    }
    .brand-name {
      font-size: 1.25rem;
      font-weight: 800;
      background: var(--gradient-laser);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      letter-spacing: -0.01em;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }
    .nav-item a {
      font-size: 0.92rem;
      font-weight: 600;
      color: var(--text-main);
      padding: 8px 14px;
      border-radius: var(--radius-full);
      display: inline-block;
    }
    .nav-item a:hover {
      color: var(--primary);
      background: rgba(99, 102, 241, 0.08);
    }
    .nav-actions {
      display: flex;
      align-items: center;
      gap: 10px;
    }
    .mobile-menu-toggle {
      display: none;
      background: none;
      border: none;
      font-size: 1.5rem;
      cursor: pointer;
      color: var(--text-main);
      padding: 6px;
    }

    /* Hero Section (Strictly NO IMAGES) */
    .hero-section {
      padding: 60px 0 50px;
      position: relative;
      overflow: hidden;
    }
    .hero-content {
      text-align: center;
      max-width: 900px;
      margin: 0 auto;
    }
    .hero-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 8px 20px;
      background: linear-gradient(135deg, rgba(99, 102, 241, 0.12), rgba(236, 72, 153, 0.12));
      border: 1px solid var(--border-laser);
      border-radius: var(--radius-full);
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--primary);
      margin-bottom: 20px;
      box-shadow: 0 4px 15px rgba(168, 85, 247, 0.15);
    }
    .hero-title {
      font-size: 2.8rem;
      font-weight: 900;
      line-height: 1.25;
      color: var(--text-main);
      margin-bottom: 20px;
      letter-spacing: -0.03em;
    }
    .hero-subtitle {
      font-size: 1.15rem;
      color: var(--text-muted);
      max-width: 760px;
      margin: 0 auto 32px;
      line-height: 1.7;
    }
    .hero-cta-group {
      display: flex;
      align-items: center;
      justify-content: center;
      gap: 16px;
      flex-wrap: wrap;
      margin-bottom: 40px;
    }
    .hero-models-capsule {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: var(--radius-lg);
      padding: 16px 20px;
      max-width: 860px;
      margin: 0 auto;
      box-shadow: var(--shadow-sm);
    }
    .hero-models-label {
      font-size: 0.85rem;
      font-weight: 700;
      color: var(--text-light);
      text-transform: uppercase;
      margin-bottom: 10px;
      letter-spacing: 0.05em;
    }
    .model-tags-wrapper {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 8px;
    }
    .model-tag {
      font-size: 0.8rem;
      font-weight: 600;
      padding: 4px 12px;
      border-radius: var(--radius-full);
      background: rgba(241, 245, 249, 0.9);
      border: 1px solid rgba(203, 213, 225, 0.8);
      color: var(--text-main);
      transition: var(--transition);
    }
    .model-tag:hover {
      background: var(--primary);
      color: #ffffff;
      border-color: var(--primary);
      transform: translateY(-2px);
    }

    /* Metrics Grid */
    .metrics-grid {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 16px;
      margin-top: 36px;
    }
    .metric-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 20px;
      text-align: center;
      box-shadow: var(--shadow-sm);
    }
    .metric-val {
      font-size: 2rem;
      font-weight: 800;
      background: var(--gradient-laser);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      margin-bottom: 4px;
    }
    .metric-name {
      font-size: 0.9rem;
      color: var(--text-muted);
      font-weight: 600;
    }

    /* Grid Layouts */
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 20px;
    }
    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
    }

    /* Cards Detail */
    .card-icon-box {
      width: 48px;
      height: 48px;
      border-radius: var(--radius-sm);
      background: var(--gradient-subtle);
      border: 1px solid var(--border-laser);
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 1.4rem;
      margin-bottom: 16px;
      color: var(--primary);
    }
    .card-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 8px;
    }
    .card-desc {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
      flex-grow: 1;
    }
    .card-footer-tag {
      margin-top: 14px;
      font-size: 0.78rem;
      font-weight: 600;
      color: var(--accent-laser-1);
      display: inline-flex;
      align-items: center;
      gap: 4px;
    }

    /* Evaluation Section */
    .eval-box {
      background: #ffffff;
      border: 1px solid var(--border-laser);
      border-radius: var(--radius-lg);
      padding: 32px;
      box-shadow: var(--shadow-laser);
      position: relative;
      overflow: hidden;
    }
    .eval-header {
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 20px;
      padding-bottom: 24px;
      border-bottom: 1px solid var(--border-color);
      margin-bottom: 24px;
    }
    .eval-score-badge {
      display: flex;
      align-items: center;
      gap: 16px;
    }
    .eval-score-num {
      font-size: 3rem;
      font-weight: 900;
      background: var(--gradient-laser);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      line-height: 1;
    }
    .eval-stars {
      color: #f59e0b;
      font-size: 1.25rem;
      letter-spacing: 2px;
    }
    .eval-table-wrap {
      overflow-x: auto;
      margin-top: 16px;
    }
    .eval-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
      min-width: 620px;
    }
    .eval-table th, .eval-table td {
      padding: 14px 16px;
      border-bottom: 1px solid rgba(226, 232, 240, 0.8);
      font-size: 0.92rem;
    }
    .eval-table th {
      background: #f8fafc;
      color: var(--text-main);
      font-weight: 700;
    }
    .eval-highlight {
      color: var(--primary);
      font-weight: 700;
      background: rgba(99, 102, 241, 0.04);
    }

    /* Showcase & Media */
    .media-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    .media-card:hover {
      box-shadow: var(--shadow-md);
      transform: translateY(-4px);
    }
    .media-img-wrap {
      width: 100%;
      aspect-ratio: 16 / 9;
      background: #f1f5f9;
      overflow: hidden;
      display: flex;
      align-items: center;
      justify-content: center;
    }
    .media-img-wrap.square {
      aspect-ratio: 1 / 1;
    }
    .media-img-wrap img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transition: transform 0.5s ease;
    }
    .media-card:hover .media-img-wrap img {
      transform: scale(1.04);
    }
    .media-body {
      padding: 18px;
    }

    /* Workflow Steps */
    .workflow-track {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }
    .step-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      position: relative;
      box-shadow: var(--shadow-sm);
    }
    .step-badge {
      width: 32px;
      height: 32px;
      border-radius: var(--radius-full);
      background: var(--gradient-laser);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.85rem;
      font-weight: 800;
      margin-bottom: 12px;
    }

    /* FAQ Accordion */
    .faq-container {
      max-width: 900px;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      overflow: hidden;
      box-shadow: var(--shadow-sm);
      transition: var(--transition);
    }
    .faq-item.active {
      border-color: var(--primary);
    }
    .faq-question {
      padding: 18px 22px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      cursor: pointer;
      font-weight: 700;
      font-size: 1rem;
      color: var(--text-main);
      user-select: none;
    }
    .faq-question:hover {
      color: var(--primary);
    }
    .faq-icon {
      font-size: 1.2rem;
      transition: transform 0.3s ease;
      color: var(--primary);
    }
    .faq-item.active .faq-icon {
      transform: rotate(45deg);
    }
    .faq-answer {
      max-height: 0;
      overflow: hidden;
      transition: max-height 0.3s ease, padding 0.3s ease;
      padding: 0 22px;
      color: var(--text-muted);
      font-size: 0.94rem;
      line-height: 1.7;
    }
    .faq-item.active .faq-answer {
      max-height: 300px;
      padding: 0 22px 20px;
    }

    /* Testimonials */
    .testimonial-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 24px;
      box-shadow: var(--shadow-sm);
      display: flex;
      flex-direction: column;
      justify-content: space-between;
    }
    .testimonial-user {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-top: 16px;
      padding-top: 16px;
      border-top: 1px solid #f1f5f9;
    }
    .avatar-placeholder {
      width: 40px;
      height: 40px;
      border-radius: var(--radius-full);
      background: var(--gradient-subtle);
      border: 1px solid var(--border-laser);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: 700;
      color: var(--primary);
      font-size: 0.9rem;
    }

    /* Form Section */
    .contact-wrapper {
      display: grid;
      grid-template-columns: 1fr 1.2fr;
      gap: 32px;
      background: #ffffff;
      border: 1px solid var(--border-laser);
      border-radius: var(--radius-lg);
      padding: 40px;
      box-shadow: var(--shadow-laser);
    }
    .contact-info {
      display: flex;
      flex-direction: column;
      gap: 20px;
    }
    .qr-card {
      display: inline-flex;
      flex-direction: column;
      align-items: center;
      gap: 10px;
      background: #f8fafc;
      padding: 16px;
      border-radius: var(--radius-md);
      border: 1px solid var(--border-color);
      width: fit-content;
    }
    .qr-card img {
      width: 140px;
      height: 140px;
      object-fit: cover;
      border-radius: var(--radius-sm);
    }
    .form-group {
      margin-bottom: 16px;
    }
    .form-label {
      display: block;
      font-size: 0.88rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 6px;
    }
    .form-input, .form-select, .form-textarea {
      width: 100%;
      padding: 12px 14px;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-sm);
      font-size: 0.92rem;
      color: var(--text-main);
      background: #fdfdfd;
      transition: var(--transition);
      outline: none;
      font-family: inherit;
    }
    .form-input:focus, .form-select:focus, .form-textarea:focus {
      border-color: var(--primary);
      box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
      background: #ffffff;
    }

    /* Articles and Info */
    .article-links-grid {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 16px;
    }
    .article-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: var(--radius-md);
      padding: 16px 20px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      transition: var(--transition);
    }
    .article-item:hover {
      border-color: var(--primary);
      transform: translateX(4px);
    }

    /* Footer */
    .site-footer {
      background: #ffffff;
      border-top: 1px solid #e2e8f0;
      padding: 50px 0 30px;
      color: var(--text-main);
      margin-top: 40px;
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1fr;
      gap: 30px;
      margin-bottom: 40px;
    }
    .footer-col-title {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 16px;
    }
    .footer-links-list {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
      font-size: 0.9rem;
      color: var(--text-muted);
    }
    .footer-links-list a:hover {
      color: var(--primary);
    }
    .friend-links-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      padding-top: 20px;
      border-top: 1px solid #f1f5f9;
      margin-bottom: 24px;
    }
    .friend-links-wrap a {
      font-size: 0.86rem;
      color: var(--text-muted);
      padding: 4px 10px;
      background: #f8fafc;
      border: 1px solid #e2e8f0;
      border-radius: var(--radius-sm);
    }
    .friend-links-wrap a:hover {
      color: var(--primary);
      border-color: var(--primary);
    }
    .footer-bottom {
      text-align: center;
      padding-top: 20px;
      border-top: 1px solid #f1f5f9;
      font-size: 0.85rem;
      color: var(--text-light);
    }

    /* Floating Customer Service */
    .floating-service {
      position: fixed;
      right: 24px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: var(--radius-full);
      background: #ffffff;
      border: 1px solid var(--border-laser);
      box-shadow: 0 4px 16px rgba(0, 0, 0, 0.1);
      display: flex;
      align-items: center;
      justify-content: center;
      cursor: pointer;
      transition: var(--transition);
      color: var(--primary);
      font-size: 1.2rem;
    }
    .float-btn:hover {
      transform: scale(1.08);
      background: var(--gradient-laser);
      color: #ffffff;
    }

    /* Responsive */
    @media (max-width: 1024px) {
      .grid-4, .workflow-track {
        grid-template-columns: repeat(2, 1fr);
      }
      .footer-grid {
        grid-template-columns: 1fr 1fr;
      }
      .contact-wrapper {
        grid-template-columns: 1fr;
      }
    }

    @media (max-width: 768px) {
      .hero-title {
        font-size: 2rem;
      }
      .metrics-grid {
        grid-template-columns: repeat(2, 1fr);
      }
      .grid-3, .grid-2, .article-links-grid {
        grid-template-columns: 1fr;
      }
      .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: var(--shadow-md);
      }
      .nav-links.active {
        display: flex;
      }
      .mobile-menu-toggle {
        display: block;
      }
      .footer-grid {
        grid-template-columns: 1fr;
      }
    }