* {
      margin: 0;
      padding: 0;
      box-sizing: border-box;
    }

    body {
      font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
      background-color: #f6f9fe;
      color: #1a2639;
      line-height: 1.5;
      -webkit-font-smoothing: antialiased;
    }

    .container {
      max-width: 1280px;
      margin: 0 auto;
      padding: 0 2rem;
    }

    /* ----- 浅色背景，柔和光感 ----- */
    .bg-soft {
      background: linear-gradient(145deg, #f6f9fe 0%, #eef4fb 100%);
    }

    /* ----- 导航栏 (浅色高雅) ----- */
    .navbar {
      display: flex;
      justify-content: space-between;
      align-items: center;
      padding: 1.5rem 0;
      flex-wrap: wrap;
      border-bottom: 1px solid rgba(0, 20, 50, 0.06);
    }

    .logo {
      display: flex;
      align-items: center;
      gap: 0.5rem;
      font-weight: 700;
      font-size: 1.8rem;
      letter-spacing: -0.02em;
      color: #0b1e38;
    }

    .logo i {
      font-size: 2rem;
      color: #1f5fcf;
      background: linear-gradient(145deg, #1f5fcf, #6d4aff);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .logo span {
      background: linear-gradient(145deg, #1a3f7a, #3b28b0);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .nav-links {
      display: flex;
      gap: 2.8rem;
      font-weight: 500;
      font-size: 0.95rem;
      color: #2b3f62;
      letter-spacing: 0.01em;
    }

    .nav-links a {
      text-decoration: none;
      color: inherit;
      transition: color 0.2s;
      position: relative;
    }

    .nav-links a::after {
      content: '';
      position: absolute;
      bottom: -4px;
      left: 0;
      width: 0%;
      height: 2px;
      background: linear-gradient(90deg, #1f5fcf, #7a5aff);
      transition: width 0.25s ease;
    }

    .nav-links a:hover {
      color: #0a1b35;
    }

    .nav-links a:hover::after {
      width: 100%;
    }

    .nav-cta {
      background: #ffffff;
      padding: 0.5rem 1.8rem;
      border-radius: 40px;
      border: 1px solid rgba(0, 20, 50, 0.08);
      color: #0b1e38;
      font-weight: 600;
      font-size: 0.9rem;
      transition: all 0.2s;
      cursor: default;
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.02);
      backdrop-filter: blur(2px);
    }

    .nav-cta:hover {
      background: #ffffff;
      border-color: #1f5fcf;
      box-shadow: 0 8px 20px rgba(31, 95, 207, 0.08);
      transform: scale(1.02);
    }

    /* ----- HERO (浅色高端) ----- */
    .hero {
      display: flex;
      flex-direction: column;
      align-items: center;
      text-align: center;
      padding: 4.5rem 0 3.5rem;
    }

    .hero-badge {
      display: inline-block;
      background: rgba(31, 95, 207, 0.06);
      padding: 0.4rem 1.4rem;
      border-radius: 40px;
      font-size: 0.8rem;
      font-weight: 600;
      color: #1f5fcf;
      border: 1px solid rgba(31, 95, 207, 0.12);
      backdrop-filter: blur(4px);
      margin-bottom: 2rem;
      letter-spacing: 0.4px;
    }

    .hero h1 {
      font-size: clamp(2.8rem, 10vw, 5rem);
      font-weight: 800;
      line-height: 1.1;
      letter-spacing: -0.03em;
      max-width: 1000px;
      color: #0b1e38;
      margin-bottom: 1.5rem;
    }

    .hero h1 i {
      color: #1f5fcf;
      background: linear-gradient(145deg, #1f5fcf, #6d4aff);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
    }

    .hero p {
      font-size: clamp(1.1rem, 2.2vw, 1.4rem);
      max-width: 720px;
      color: #2e4469;
      font-weight: 400;
      letter-spacing: 0.1px;
      margin-bottom: 2.8rem;
      line-height: 1.6;
    }

    .hero-actions {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 1.2rem;
    }

    .btn-primary {
      background: linear-gradient(145deg, #1f5fcf, #5b3df0);
      border: none;
      padding: 0.9rem 2.8rem;
      border-radius: 60px;
      font-weight: 600;
      font-size: 1rem;
      color: white;
      cursor: pointer;
      transition: all 0.3s ease;
      box-shadow: 0 8px 24px rgba(31, 95, 207, 0.2);
      display: inline-flex;
      align-items: center;
      gap: 0.6rem;
      letter-spacing: 0.2px;
    }

    .btn-primary:hover {
      transform: scale(1.03);
      box-shadow: 0 14px 34px rgba(31, 95, 207, 0.3);
      background: linear-gradient(145deg, #2a6ee0, #6b4aff);
    }

    .btn-secondary {
      background: #ffffff;
      border: 1px solid rgba(0, 20, 50, 0.1);
      padding: 0.9rem 2.8rem;
      border-radius: 60px;
      font-weight: 500;
      font-size: 1rem;
      color: #1a2f50;
      cursor: pointer;
      transition: all 0.25s;
      display: inline-flex;
      align-items: center;
      gap: 0.6rem;
      box-shadow: 0 4px 12px rgba(0,0,0,0.02);
    }

    .btn-secondary:hover {
      background: #ffffff;
      border-color: #1f5fcf;
      box-shadow: 0 8px 24px rgba(31, 95, 207, 0.06);
      transform: scale(1.02);
    }

    /* 信任行 - 浅色 */
    .trust-row {
      margin-top: 4rem;
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      align-items: center;
      gap: 2.8rem 4rem;
      color: #34507b;
      font-weight: 400;
    }

    .trust-row span {
      display: flex;
      align-items: center;
      gap: 0.5rem;
      font-size: 0.9rem;
      font-weight: 500;
      color: #1f3b63;
    }

    .trust-row i {
      font-size: 1.4rem;
      color: #1f5fcf;
      opacity: 0.7;
    }

    /* ----- 核心亮点 (4列更丰富) ----- */
    .features {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
      gap: 2rem;
      margin: 4rem 0 3.5rem;
    }

    .feature-card {
      background: #ffffff;
      border-radius: 32px;
      padding: 2.2rem 1.6rem;
      border: 1px solid rgba(0, 20, 50, 0.04);
      transition: all 0.25s ease;
      box-shadow: 0 12px 28px -12px rgba(0, 0, 0, 0.04);
    }

    .feature-card:hover {
      transform: translateY(-6px);
      border-color: rgba(31, 95, 207, 0.15);
      box-shadow: 0 24px 44px -16px rgba(31, 95, 207, 0.10);
    }

    .feature-icon {
      font-size: 2.6rem;
      margin-bottom: 1rem;
      color: #1f5fcf;
      background: linear-gradient(145deg, #1f5fcf, #6d4aff);
      -webkit-background-clip: text;
      -webkit-text-fill-color: transparent;
      background-clip: text;
      display: inline-block;
    }

    .feature-card h3 {
      font-size: 1.3rem;
      font-weight: 700;
      letter-spacing: -0.02em;
      margin-bottom: 0.4rem;
      color: #0b1e38;
    }

    .feature-card p {
      color: #3a5179;
      font-weight: 400;
      line-height: 1.6;
      font-size: 0.95rem;
    }

    /* ----- 统计+额外信息 (版块丰富) ----- */
    .stats-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
      gap: 2rem;
      margin: 2.5rem 0 2rem;
      padding: 2.8rem 0;
      border-top: 1px solid rgba(0, 20, 50, 0.06);
      border-bottom: 1px solid rgba(0, 20, 50, 0.06);
    }

    .stat-item {
      text-align: center;
    }

    .stat-number {
      font-size: 2.8rem;
      font-weight: 700;
      color: #0b1e38;
      letter-spacing: -0.02em;
    }

    .stat-number i {
      color: #1f5fcf;
      font-size: 2rem;
      margin-right: 0.2rem;
    }

    .stat-label {
      font-size: 0.9rem;
      color: #3a5a82;
      margin-top: 0.3rem;
      font-weight: 450;
    }

    /* 额外区块：服务标签 + 引用 */
    .extra-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 1.8rem;
      margin: 3rem 0 2.5rem;
    }

    .extra-item {
      background: #ffffff;
      padding: 1.6rem 1.2rem;
      border-radius: 28px;
      border: 1px solid rgba(0,0,0,0.02);
      display: flex;
      align-items: center;
      gap: 1rem;
      box-shadow: 0 6px 16px -8px rgba(0,0,0,0.02);
      transition: 0.2s;
    }

    .extra-item:hover {
      border-color: rgba(31, 95, 207, 0.1);
      background: #fafdff;
    }

    .extra-item i {
      font-size: 2rem;
      color: #1f5fcf;
      opacity: 0.8;
      min-width: 2.2rem;
      text-align: center;
    }

    .extra-item div {
      font-weight: 500;
      color: #0b1e38;
      font-size: 0.95rem;
    }

    .extra-item small {
      display: block;
      font-weight: 400;
      color: #4c6a93;
      font-size: 0.8rem;
      margin-top: 0.15rem;
    }

    /* 过程 / 工作原理 (版块丰富) */
    .section-title {
      font-size: clamp(2rem, 4vw, 2.6rem);
      font-weight: 700;
      letter-spacing: -0.02em;
      margin: 3.5rem 0 2rem;
      color: #0b1e38;
      text-align: center;
    }

    .section-sub {
      text-align: center;
      color: #3e5b84;
      max-width: 680px;
      margin: -0.5rem auto 2.5rem;
      font-weight: 400;
    }

    .process-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
      gap: 2rem 1.5rem;
      margin-bottom: 3rem;
    }

    .process-step {
      background: #ffffff;
      padding: 2rem 1.5rem;
      border-radius: 28px;
      border: 1px solid rgba(0, 0, 0, 0.02);
      transition: 0.2s;
      text-align: center;
      box-shadow: 0 8px 20px -12px rgba(0,0,0,0.02);
    }

    .process-step:hover {
      border-color: rgba(31, 95, 207, 0.08);
      background: #fafdff;
    }

    .step-number {
      display: inline-block;
      font-weight: 700;
      font-size: 0.85rem;
      padding: 0.2rem 0.9rem;
      border-radius: 40px;
      background: rgba(31, 95, 207, 0.05);
      color: #1f5fcf;
      margin-bottom: 1rem;
      border: 1px solid rgba(31, 95, 207, 0.08);
    }

    .process-step h4 {
      font-size: 1.2rem;
      font-weight: 700;
      margin-bottom: 0.4rem;
      color: #0b1e38;
    }

    .process-step p {
      color: #3a5a82;
      font-weight: 400;
      font-size: 0.95rem;
    }

    /* 测试 / 案例卡片 — 增加丰富度 */
    .testimonial-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
      gap: 2rem;
      margin: 3rem 0 2rem;
    }

    .testimonial-card {
      background: #ffffff;
      padding: 2rem 1.8rem;
      border-radius: 32px;
      border: 1px solid rgba(0,0,0,0.02);
      box-shadow: 0 12px 26px -12px rgba(0,0,0,0.02);
    }

    .testimonial-card i {
      color: #1f5fcf;
      opacity: 0.3;
      font-size: 1.8rem;
      margin-bottom: 0.5rem;
    }

    .testimonial-card p {
      font-size: 0.95rem;
      line-height: 1.6;
      color: #1a2f50;
      font-weight: 400;
    }

    .testimonial-card .author {
      margin-top: 1.2rem;
      font-weight: 600;
      color: #0b1e38;
      font-size: 0.9rem;
    }

    .testimonial-card .author span {
      font-weight: 400;
      color: #4a6b94;
      display: block;
      font-size: 0.8rem;
      margin-top: 0.1rem;
    }

    /* 页脚 */
    .footer {
      margin-top: 4.5rem;
      padding: 3rem 0 2rem;
      border-top: 1px solid rgba(0, 20, 50, 0.06);
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      align-items: center;
      gap: 1.5rem;
      color: #3a5a82;
    }

    .footer-left {
      display: flex;
      align-items: center;
      gap: 2rem;
      flex-wrap: wrap;
    }

    .footer-left span {
      font-size: 0.9rem;
      font-weight: 400;
    }

    .footer-socials {
      display: flex;
      gap: 1.8rem;
      font-size: 1.2rem;
    }

    .footer-socials a {
      color: #3a5a82;
      transition: color 0.2s;
    }

    .footer-socials a:hover {
      color: #1f5fcf;
    }
a {
  text-decoration: none; /* 去除下划线 */
  color: inherit;        /* 继承父元素颜色，去除默认蓝/紫 */
  outline: none;         /* 去除键盘聚焦时的虚线框（需注意无障碍体验） */
  cursor: pointer;       /* 保持鼠标手型光标，提示可点击 */
  background-color: transparent; /* 确保无默认背景色 */
}

    /* 响应式 */
    @media screen and (max-width: 768px) {
      .container { padding: 0 1.5rem; }
      .navbar { flex-direction: column; align-items: flex-start; gap: 1rem; }
      .nav-links { gap: 1.6rem; flex-wrap: wrap; }
      .hero { padding: 3rem 0 2rem; }
      .hero h1 { font-size: clamp(2.2rem, 12vw, 3.6rem); }
      .trust-row { gap: 1.2rem 2rem; }
      .features { grid-template-columns: 1fr; }
      .extra-grid { grid-template-columns: 1fr; }
      .testimonial-grid { grid-template-columns: 1fr; }
      .stats-grid { grid-template-columns: 1fr 1fr; }
      .footer { flex-direction: column; align-items: flex-start; }
      .footer-left { flex-direction: column; align-items: flex-start; gap: 0.8rem; }
    }

    @media screen and (max-width: 480px) {
      .hero-actions { flex-direction: column; align-items: center; width: 100%; }
      .btn-primary, .btn-secondary { width: 100%; justify-content: center; }
      .stat-number { font-size: 2rem; }
    }