:root {
      --bg-main: #f8fafc;
      --bg-card: #ffffff;
      --text-main: #0f172a;
      --text-muted: #475569;
      --primary: #4f46e5;
      --neon-cyan: #06b6d4;
      --neon-pink: #ec4899;
      --neon-violet: #8b5cf6;
      --border-color: #e2e8f0;
      --border-glow: rgba(79, 70, 229, 0.15);
      --card-shadow: 0 10px 25px -5px rgba(15, 23, 42, 0.05), 0 8px 10px -6px rgba(15, 23, 42, 0.05);
      --container-width: 1200px;
    }
    * {
      box-sizing: border-box;
      margin: 0;
      padding: 0;
    }
    html {
      scroll-behavior: smooth;
      font-size: 16px;
    }
    body {
      background-color: var(--bg-main);
      background-image: 
        radial-gradient(at 0% 0%, rgba(6, 182, 212, 0.06) 0px, transparent 50%),
        radial-gradient(at 100% 0%, rgba(236, 72, 153, 0.06) 0px, transparent 50%),
        radial-gradient(at 50% 100%, rgba(139, 92, 246, 0.06) 0px, transparent 50%);
      background-attachment: fixed;
      color: var(--text-main);
      font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
      line-height: 1.6;
    }
    .container {
      max-width: var(--container-width);
      margin: 0 auto;
      padding: 0 20px;
      width: 100%;
    }
    header {
      position: sticky;
      top: 0;
      z-index: 1000;
      background: rgba(255, 255, 255, 0.92);
      backdrop-filter: blur(12px);
      border-bottom: 1px solid var(--border-color);
    }
    .header-inner {
      display: flex;
      align-items: center;
      justify-content: space-between;
      height: 72px;
    }
    .brand-wrap {
      display: flex;
      align-items: center;
      gap: 12px;
      text-decoration: none;
      color: var(--text-main);
    }
    .logo-container {
      max-width: 130px;
      display: flex;
      align-items: center;
    }
    .brand-text {
      font-size: 1.15rem;
      font-weight: 700;
      letter-spacing: -0.5px;
      background: linear-gradient(135deg, #0f172a, #4f46e5);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .nav-menu {
      display: flex;
      align-items: center;
    }
    .nav-links {
      display: flex;
      align-items: center;
      gap: 0;
      list-style: none;
    }
    .nav-links li a {
      text-decoration: none;
      color: var(--text-muted);
      font-size: 0.92rem;
      font-weight: 500;
      padding: 8px 12px;
      border-radius: 6px;
      transition: all 0.2s ease;
      display: inline-block;
    }
    .nav-links li a:hover {
      color: var(--primary);
      background: rgba(79, 70, 229, 0.05);
    }
    .header-actions {
      display: flex;
      align-items: center;
      gap: 12px;
    }
    .btn {
      display: inline-flex;
      align-items: center;
      justify-content: center;
      padding: 10px 22px;
      font-size: 0.92rem;
      font-weight: 600;
      border-radius: 8px;
      text-decoration: none;
      cursor: pointer;
      border: 1px solid transparent;
      transition: all 0.25s ease;
    }
    .btn-neon-primary {
      background: linear-gradient(135deg, #4f46e5, #06b6d4);
      color: #ffffff;
      box-shadow: 0 4px 15px rgba(6, 182, 212, 0.3);
    }
    .btn-neon-primary:hover {
      box-shadow: 0 6px 20px rgba(6, 182, 212, 0.45);
      transform: translateY(-1px);
    }
    .btn-outline {
      border-color: var(--border-color);
      color: var(--text-main);
      background: #ffffff;
    }
    .btn-outline:hover {
      border-color: var(--neon-cyan);
      color: var(--primary);
      background: #f8fafc;
    }
    .mobile-toggle {
      display: none;
      background: none;
      border: none;
      cursor: pointer;
      padding: 8px;
    }
    .mobile-toggle span {
      display: block;
      width: 22px;
      height: 2px;
      background-color: var(--text-main);
      margin: 5px 0;
      transition: 0.3s;
    }
    .section-spacing {
      padding: 70px 0;
    }
    .section-header {
      text-align: center;
      max-width: 780px;
      margin: 0 auto 50px auto;
    }
    .section-badge {
      display: inline-block;
      padding: 4px 14px;
      font-size: 0.8rem;
      font-weight: 600;
      color: var(--primary);
      background: rgba(79, 70, 229, 0.08);
      border: 1px solid rgba(79, 70, 229, 0.2);
      border-radius: 20px;
      margin-bottom: 14px;
      text-transform: uppercase;
      letter-spacing: 0.5px;
    }
    .section-title {
      font-size: 2rem;
      font-weight: 800;
      color: var(--text-main);
      line-height: 1.3;
      margin-bottom: 14px;
    }
    .section-desc {
      font-size: 1rem;
      color: var(--text-muted);
    }
    .hero-section {
      padding: 75px 0 65px 0;
      text-align: center;
      position: relative;
    }
    .hero-glow-badge {
      display: inline-flex;
      align-items: center;
      gap: 8px;
      padding: 6px 16px;
      background: #ffffff;
      border: 1px solid #e2e8f0;
      border-radius: 30px;
      font-size: 0.85rem;
      font-weight: 600;
      color: var(--text-main);
      box-shadow: 0 4px 12px rgba(6, 182, 212, 0.12);
      margin-bottom: 24px;
    }
    .pulse-dot {
      width: 8px;
      height: 8px;
      border-radius: 50%;
      background-color: #10b981;
      box-shadow: 0 0 0 4px rgba(16, 185, 129, 0.2);
    }
    .hero-title {
      font-size: 2.6rem;
      font-weight: 900;
      line-height: 1.25;
      color: #0f172a;
      max-width: 900px;
      margin: 0 auto 20px auto;
      letter-spacing: -0.5px;
    }
    .hero-title-highlight {
      background: linear-gradient(135deg, #4f46e5 0%, #06b6d4 50%, #ec4899 100%);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .hero-subtitle {
      font-size: 1.15rem;
      color: var(--text-muted);
      max-width: 760px;
      margin: 0 auto 36px auto;
    }
    .hero-buttons {
      display: flex;
      justify-content: center;
      gap: 16px;
      margin-bottom: 45px;
      flex-wrap: wrap;
    }
    .btn-hero-main {
      padding: 14px 34px;
      font-size: 1.05rem;
      font-weight: 700;
      background: linear-gradient(135deg, #4f46e5, #06b6d4);
      color: #ffffff;
      border-radius: 10px;
      box-shadow: 0 8px 25px rgba(6, 182, 212, 0.35);
      text-decoration: none;
      border: 1px solid rgba(255, 255, 255, 0.4);
      transition: all 0.25s ease;
    }
    .btn-hero-main:hover {
      box-shadow: 0 12px 30px rgba(6, 182, 212, 0.5);
      transform: translateY(-2px);
    }
    .btn-hero-sub {
      padding: 14px 28px;
      font-size: 1rem;
      font-weight: 600;
      background: #ffffff;
      color: var(--text-main);
      border: 1px solid var(--border-color);
      border-radius: 10px;
      text-decoration: none;
      transition: all 0.25s ease;
    }
    .btn-hero-sub:hover {
      border-color: var(--neon-cyan);
      background: #f8fafc;
      color: var(--primary);
    }
    .metrics-bar {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 18px;
      margin-top: 20px;
    }
    .metric-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 14px;
      padding: 22px 16px;
      text-align: center;
      box-shadow: var(--card-shadow);
      position: relative;
      overflow: hidden;
    }
    .metric-card::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      right: 0;
      height: 3px;
      background: linear-gradient(90deg, #06b6d4, #4f46e5);
    }
    .metric-number {
      font-size: 2rem;
      font-weight: 800;
      color: #0f172a;
      line-height: 1.1;
      margin-bottom: 6px;
    }
    .metric-label {
      font-size: 0.88rem;
      color: var(--text-muted);
    }
    .neon-card {
      background: var(--bg-card);
      border: 1px solid var(--border-color);
      border-radius: 14px;
      padding: 26px;
      box-shadow: var(--card-shadow);
      transition: all 0.3s ease;
      position: relative;
    }
    .neon-card:hover {
      border-color: rgba(6, 182, 212, 0.4);
      transform: translateY(-4px);
      box-shadow: 0 16px 30px -10px rgba(6, 182, 212, 0.15);
    }
    .grid-2 {
      display: grid;
      grid-template-columns: repeat(2, 1fr);
      gap: 24px;
    }
    .grid-3 {
      display: grid;
      grid-template-columns: repeat(3, 1fr);
      gap: 22px;
    }
    .grid-4 {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
    }
    .model-tags-container {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
      margin-top: 25px;
    }
    .model-tag {
      padding: 8px 16px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      font-size: 0.88rem;
      font-weight: 600;
      color: var(--text-main);
      box-shadow: 0 2px 5px rgba(0, 0, 0, 0.02);
      transition: all 0.2s ease;
    }
    .model-tag:hover {
      border-color: var(--neon-pink);
      color: var(--primary);
      background: rgba(236, 72, 153, 0.04);
    }
    .card-icon-box {
      width: 44px;
      height: 44px;
      border-radius: 10px;
      background: linear-gradient(135deg, rgba(79, 70, 229, 0.1), rgba(6, 182, 212, 0.1));
      color: var(--primary);
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      font-size: 1.1rem;
      margin-bottom: 16px;
    }
    .card-title {
      font-size: 1.15rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 10px;
    }
    .card-text {
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
    }
    .process-timeline {
      display: grid;
      grid-template-columns: repeat(4, 1fr);
      gap: 20px;
      position: relative;
    }
    .process-step {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 12px;
      padding: 24px 20px;
      position: relative;
    }
    .step-badge {
      width: 32px;
      height: 32px;
      border-radius: 50%;
      background: linear-gradient(135deg, #4f46e5, #06b6d4);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-size: 0.9rem;
      font-weight: 700;
      margin-bottom: 14px;
    }
    .media-card {
      overflow: hidden;
      border-radius: 14px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      box-shadow: var(--card-shadow);
    }
    .media-container {
      width: 100%;
      aspect-ratio: 16/9;
      background: #e2e8f0;
      overflow: hidden;
    }
    .media-container.square {
      aspect-ratio: 1/1;
    }
    .media-container img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
      transition: transform 0.4s ease;
    }
    .media-card:hover img {
      transform: scale(1.03);
    }
    .media-info {
      padding: 20px;
    }
    .eval-highlight-box {
      background: linear-gradient(135deg, #ffffff 0%, #f1f5f9 100%);
      border: 2px solid rgba(6, 182, 212, 0.4);
      border-radius: 16px;
      padding: 36px;
      box-shadow: 0 15px 35px rgba(6, 182, 212, 0.1);
      margin-bottom: 30px;
      display: flex;
      align-items: center;
      justify-content: space-between;
      flex-wrap: wrap;
      gap: 24px;
    }
    .eval-score-num {
      font-size: 3.8rem;
      font-weight: 900;
      line-height: 1;
      background: linear-gradient(135deg, #4f46e5, #06b6d4);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
    }
    .eval-stars {
      color: #f59e0b;
      font-size: 1.4rem;
      margin-top: 6px;
    }
    .table-responsive {
      overflow-x: auto;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 14px;
      box-shadow: var(--card-shadow);
    }
    .comparison-table {
      width: 100%;
      border-collapse: collapse;
      text-align: left;
    }
    .comparison-table th,
    .comparison-table td {
      padding: 16px 20px;
      border-bottom: 1px solid var(--border-color);
      font-size: 0.94rem;
    }
    .comparison-table th {
      background: #f8fafc;
      font-weight: 700;
      color: var(--text-main);
    }
    .comparison-table tr:last-child td {
      border-bottom: none;
    }
    .comparison-table td:nth-child(2) {
      font-weight: 700;
      color: var(--primary);
      background: rgba(79, 70, 229, 0.02);
    }
    .tag-badge {
      display: inline-block;
      padding: 2px 8px;
      border-radius: 4px;
      font-size: 0.78rem;
      font-weight: 600;
    }
    .tag-green {
      background: #dcfce7;
      color: #166534;
    }
    .tag-gray {
      background: #f1f5f9;
      color: #475569;
    }
    .testimonial-card {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 14px;
      padding: 24px;
      display: flex;
      flex-direction: column;
      justify-content: space-between;
      box-shadow: var(--card-shadow);
    }
    .testimonial-user {
      display: flex;
      align-items: center;
      gap: 12px;
      margin-top: 18px;
      border-top: 1px solid #f1f5f9;
      padding-top: 14px;
    }
    .user-avatar-text {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: linear-gradient(135deg, #4f46e5, #06b6d4);
      color: #ffffff;
      display: flex;
      align-items: center;
      justify-content: center;
      font-weight: bold;
      font-size: 0.95rem;
    }
    .user-name {
      font-size: 0.95rem;
      font-weight: 700;
      color: var(--text-main);
    }
    .user-title {
      font-size: 0.8rem;
      color: var(--text-muted);
    }
    .faq-item {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 10px;
      margin-bottom: 12px;
      overflow: hidden;
      transition: border-color 0.2s;
    }
    .faq-question {
      width: 100%;
      text-align: left;
      padding: 18px 22px;
      background: none;
      border: none;
      font-size: 1rem;
      font-weight: 600;
      color: var(--text-main);
      display: flex;
      justify-content: space-between;
      align-items: center;
      cursor: pointer;
    }
    .faq-arrow {
      font-size: 0.9rem;
      color: var(--neon-cyan);
      transition: transform 0.25s ease;
    }
    .faq-answer {
      display: none;
      padding: 0 22px 18px 22px;
      font-size: 0.92rem;
      color: var(--text-muted);
      line-height: 1.6;
    }
    .faq-item.active .faq-arrow {
      transform: rotate(180deg);
    }
    .form-box {
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 16px;
      padding: 34px;
      box-shadow: var(--card-shadow);
    }
    .form-group {
      margin-bottom: 18px;
    }
    .form-label {
      display: block;
      font-size: 0.9rem;
      font-weight: 600;
      color: var(--text-main);
      margin-bottom: 6px;
    }
    .form-control {
      width: 100%;
      padding: 11px 14px;
      font-size: 0.92rem;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      background: #f8fafc;
      color: var(--text-main);
      transition: all 0.2s ease;
      font-family: inherit;
    }
    .form-control:focus {
      outline: none;
      border-color: var(--neon-cyan);
      background: #ffffff;
      box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.15);
    }
    textarea.form-control {
      resize: vertical;
      min-height: 100px;
    }
    .article-link-list {
      display: flex;
      flex-direction: column;
      gap: 12px;
    }
    .article-item {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 14px 18px;
      background: #ffffff;
      border: 1px solid var(--border-color);
      border-radius: 10px;
      text-decoration: none;
      color: var(--text-main);
      font-size: 0.92rem;
      transition: all 0.2s;
    }
    .article-item:hover {
      border-color: var(--neon-cyan);
      color: var(--primary);
      padding-left: 22px;
    }
    footer {
      background: #ffffff;
      border-top: 1px solid var(--border-color);
      padding: 55px 0 30px 0;
      color: var(--text-muted);
    }
    .footer-grid {
      display: grid;
      grid-template-columns: 2fr 1fr 1fr 1.2fr;
      gap: 36px;
      margin-bottom: 40px;
    }
    .footer-title {
      font-size: 1rem;
      font-weight: 700;
      color: var(--text-main);
      margin-bottom: 16px;
    }
    .footer-links {
      list-style: none;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .footer-links a {
      color: var(--text-muted);
      text-decoration: none;
      font-size: 0.88rem;
      transition: color 0.2s;
    }
    .footer-links a:hover {
      color: var(--primary);
    }
    .qrcode-box {
      width: 105px;
      height: 105px;
      background: #f1f5f9;
      border: 1px solid var(--border-color);
      border-radius: 8px;
      overflow: hidden;
      margin-top: 8px;
    }
    .qrcode-box img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      display: block;
    }
    .footer-bottom {
      border-top: 1px solid var(--border-color);
      padding-top: 24px;
      display: flex;
      justify-content: space-between;
      align-items: center;
      flex-wrap: wrap;
      gap: 14px;
      font-size: 0.85rem;
    }
    .friend-links-wrap {
      display: flex;
      flex-wrap: wrap;
      gap: 12px;
      margin-top: 6px;
    }
    .friend-links-wrap a {
      color: var(--text-muted);
      text-decoration: none;
      font-size: 0.84rem;
    }
    .friend-links-wrap a:hover {
      color: var(--primary);
    }
    .float-service {
      position: fixed;
      right: 20px;
      bottom: 30px;
      z-index: 999;
      display: flex;
      flex-direction: column;
      gap: 10px;
    }
    .float-btn {
      width: 48px;
      height: 48px;
      border-radius: 50%;
      background: #ffffff;
      border: 1px solid var(--border-color);
      box-shadow: 0 4px 15px rgba(0,0,0,0.1);
      display: flex;
      align-items: center;
      justify-content: center;
      color: var(--primary);
      text-decoration: none;
      font-size: 1.1rem;
      cursor: pointer;
      transition: all 0.25s;
    }
    .float-btn:hover {
      transform: scale(1.08);
      border-color: var(--neon-cyan);
      box-shadow: 0 6px 20px rgba(6, 182, 212, 0.3);
    }
    @media (max-width: 1024px) {
      .grid-4 { grid-template-columns: repeat(2, 1fr); }
      .process-timeline { grid-template-columns: repeat(2, 1fr); }
      .metrics-bar { grid-template-columns: repeat(2, 1fr); }
      .footer-grid { grid-template-columns: 1fr 1fr; }
    }
    @media (max-width: 768px) {
      .hero-title { font-size: 2rem; }
      .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
      .process-timeline { grid-template-columns: 1fr; }
      .metrics-bar { grid-template-columns: 1fr; }
      .nav-menu {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        background: #ffffff;
        border-bottom: 1px solid var(--border-color);
        padding: 16px 20px;
        box-shadow: 0 10px 20px rgba(0,0,0,0.08);
      }
      .nav-menu.active {
        display: block;
      }
      .nav-links {
        flex-direction: column;
        align-items: flex-start;
      }
      .nav-links li {
        width: 100%;
      }
      .nav-links li a {
        width: 100%;
        padding: 10px 0;
      }
      .mobile-toggle {
        display: block;
      }
      .eval-highlight-box {
        text-align: center;
        justify-content: center;
      }
      .footer-grid { grid-template-columns: 1fr; }
      .footer-bottom {
        flex-direction: column;
        align-items: flex-start;
      }
    }