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

    :root {
      --primary-color: #4361ee;
      --secondary-color: #3a0ca3;
      --accent-color: #f72585;
      --light-color: #f8f9fa;
      --dark-color: #212529;
      --success-color: #4cc9f0;
      --warning-color: #f8961e;
      --dark-blue: #1a2a6c;
      --dark-red: #b21f1f;
      --transition: all 0.3s ease;
    }

    body {
      font-family: 'Noto Sans SC', sans-serif;
      background: linear-gradient(135deg, #f5f7fa, #e4e7f1);
      color: #333;
      line-height: 1.6;
    }

    /* 导航栏样式 */
    .navbar {
      background: rgba(26, 42, 108, 0.95);
      box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
      position: fixed;
      width: 100%;
      z-index: 1000;
      padding: 15px 5%;
      display: flex;
      justify-content: space-between;
      align-items: center;
    }

    .logo {
      display: flex;
      align-items: center;
    }

    .logo img {
      height: 40px;
      margin-right: 12px;
    }

    .logo-text {
      font-family: 'Playfair Display', serif;
      font-size: 24px;
      color: white;
      font-weight: 700;
    }

    .logo-text span {
      color: var(--success-color);
    }

    .nav-links {
      display: flex;
      list-style: none;
    }

    .nav-links li {
      margin: 0 15px;
    }

    .nav-links a {
      color: rgba(255, 255, 255, 0.85);
      text-decoration: none;
      font-weight: 500;
      transition: var(--transition);
      padding: 8px 12px;
      border-radius: 4px;
    }

    .nav-links a:hover {
      color: white;
      background: rgba(255, 255, 255, 0.1);
    }

    .nav-links .btn {
      background: var(--accent-color);
      color: white;
      padding: 8px 20px;
      border-radius: 30px;
      font-weight: 600;
    }

    .nav-links .btn:hover {
      background: #d0006f;
      transform: translateY(-2px);
      box-shadow: 0 4px 12px rgba(247, 37, 133, 0.3);
    }

    /* 英雄区域 */
    .hero {
      height: 100vh;
      display: flex;
      align-items: center;
      background: linear-gradient(135deg, var(--dark-blue), var(--dark-red));
      padding: 0 10%;
      position: relative;
      overflow: hidden;
    }

    .hero::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: url('./photo-1518837695005-2083093ee35b.jpeg') no-repeat center center/cover;
      opacity: 0.15;
    }

    .hero-content {
      max-width: 600px;
      color: white;
      z-index: 10;
    }

    .hero h1 {
      font-size: 3.5rem;
      font-weight: 800;
      margin-bottom: 20px;
      line-height: 1.2;
      font-family: 'Playfair Display', serif;
    }

    .hero p {
      font-size: 1.2rem;
      margin-bottom: 30px;
      opacity: 0.9;
      max-width: 550px;
    }

    .btn-container {
      display: flex;
      gap: 20px;
    }

    .btn {
      padding: 14px 32px;
      border-radius: 50px;
      font-weight: 600;
      text-decoration: none;
      transition: var(--transition);
      display: inline-block;
      text-align: center;
    }

    .btn-primary {
      background: var(--success-color);
      color: white;
      box-shadow: 0 4px 20px rgba(76, 201, 240, 0.4);
    }

    .btn-primary:hover {
      background: #3ab9df;
      transform: translateY(-3px);
      box-shadow: 0 6px 25px rgba(76, 201, 240, 0.6);
    }

    .btn-secondary {
      background: transparent;
      color: white;
      border: 2px solid white;
    }

    .btn-secondary:hover {
      background: rgba(255, 255, 255, 0.1);
      transform: translateY(-3px);
    }

    /* 特点部分 */
    .features {
      padding: 100px 10%;
      background: white;
    }

    .section-title {
      text-align: center;
      margin-bottom: 60px;
    }

    .section-title h2 {
      font-size: 2.5rem;
      color: var(--dark-blue);
      margin-bottom: 15px;
      font-family: 'Playfair Display', serif;
    }

    .section-title p {
      color: #666;
      font-size: 1.1rem;
      max-width: 700px;
      margin: 0 auto;
    }

    .features-grid {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
      gap: 40px;
    }

    .feature-card {
      background: white;
      border-radius: 12px;
      overflow: hidden;
      box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
      transition: var(--transition);
      padding: 40px 30px;
      text-align: center;
    }

    .feature-card:hover {
      transform: translateY(-10px);
      box-shadow: 0 15px 40px rgba(0, 0, 0, 0.12);
    }

    .feature-icon {
      width: 80px;
      height: 80px;
      background: linear-gradient(135deg, var(--dark-blue), var(--dark-red));
      border-radius: 50%;
      display: flex;
      align-items: center;
      justify-content: center;
      margin: 0 auto 25px;
    }

    .feature-icon i {
      font-size: 32px;
      color: white;
    }

    .feature-card h3 {
      font-size: 1.5rem;
      margin-bottom: 15px;
      color: var(--dark-blue);
    }

    .feature-card p {
      color: #666;
      font-size: 1rem;
    }

    /* 学习展示部分 */
    .showcase {
      padding: 100px 10%;
      background: linear-gradient(to bottom, #f0f4ff, #e6ebfa);
      position: relative;
      overflow: hidden;
    }

    .showcase-content {
      display: flex;
      align-items: center;
      gap: 60px;
    }

    .showcase-image {
      flex: 1;
      border-radius: 20px;
      overflow: hidden;
      box-shadow: 0 25px 50px rgba(26, 42, 108, 0.2);
      position: relative;
    }

    .showcase-image img {
      width: 100%;
      display: block;
      transition: var(--transition);
    }

    .showcase-image:hover img {
      transform: scale(1.05);
    }

    .showcase-text {
      flex: 1;
    }

    .showcase-text h2 {
      font-size: 2.5rem;
      color: var(--dark-blue);
      margin-bottom: 25px;
      font-family: 'Playfair Display', serif;
    }

    .showcase-text p {
      margin-bottom: 20px;
      font-size: 1.1rem;
      line-height: 1.8;
    }

    .benefits {
      margin-top: 30px;
    }

    .benefit-item {
      display: flex;
      align-items: center;
      margin-bottom: 15px;
    }

    .benefit-item i {
      color: var(--success-color);
      margin-right: 15px;
      font-size: 20px;
    }

    /* CTA部分 */
    .cta {
      padding: 100px 10%;
      text-align: center;
      background: linear-gradient(135deg, var(--dark-blue), var(--dark-red));
      color: white;
      position: relative;
      overflow: hidden;
    }

    .cta::before {
      content: '';
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: url('./photo-1518837695005-2083093ee35b.jpeg') no-repeat center center/cover;
      opacity: 0.1;
    }

    .cta h2 {
      font-size: 2.8rem;
      margin-bottom: 20px;
      font-family: 'Playfair Display', serif;
    }

    .cta p {
      font-size: 1.2rem;
      max-width: 700px;
      margin: 0 auto 40px;
      opacity: 0.9;
    }

    .cta .btn {
      font-size: 1.1rem;
      padding: 16px 45px;
    }

    /* 底部学习资源库入口 */
    .resourese-preview {
      padding: 100px 10%;
      background: white;
    }

    .resourese-content {
      text-align: center;
      max-width: 800px;
      margin: 0 auto;
    }

    .resourese-content h2 {
      font-size: 2.5rem;
      color: var(--dark-blue);
      margin-bottom: 20px;
      font-family: 'Playfair Display', serif;
    }

    .resourese-content p {
      color: #666;
      font-size: 1.1rem;
      margin-bottom: 40px;
    }

    .resourese-btn {
      background: var(--accent-color);
      color: white;
      padding: 14px 45px;
      border-radius: 50px;
      font-weight: 600;
      text-decoration: none;
      transition: var(--transition);
      display: inline-block;
      font-size: 1.1rem;
      box-shadow: 0 4px 20px rgba(247, 37, 133, 0.4);
    }

    .resourese-btn:hover {
      background: #d0006f;
      transform: translateY(-3px);
      box-shadow: 0 6px 25px rgba(247, 37, 133, 0.6);
    }

    /* 页脚 */
    .footer {
      background: var(--dark-blue);
      color: rgba(255, 255, 255, 0.8);
      padding: 60px 10% 30px;
    }

    .footer-content {
      display: grid;
      grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
      gap: 40px;
      margin-bottom: 40px;
    }

    .footer-logo {
      font-family: 'Playfair Display', serif;
      font-size: 28px;
      color: white;
      margin-bottom: 20px;
      display: block;
    }

    .footer-logo span {
      color: var(--success-color);
    }

    .footer-about p {
      margin-bottom: 20px;
      line-height: 1.8;
    }

    .social-links {
      display: flex;
      gap: 15px;
    }

    .social-links a {
      width: 40px;
      height: 40px;
      border-radius: 50%;
      background: rgba(255, 255, 255, 0.1);
      display: flex;
      align-items: center;
      justify-content: center;
      color: white;
      transition: var(--transition);
    }

    .social-links a:hover {
      background: var(--success-color);
      transform: translateY(-3px);
    }

    .footer h3 {
      color: white;
      font-size: 1.3rem;
      margin-bottom: 20px;
    }

    .footer-links {
      list-style: none;
    }

    .footer-links li {
      margin-bottom: 12px;
    }

    .footer-links a {
      color: rgba(255, 255, 255, 0.7);
      text-decoration: none;
      transition: var(--transition);
    }

    .footer-links a:hover {
      color: var(--success-color);
      padding-left: 5px;
    }

    .copyright {
      text-align: center;
      padding-top: 30px;
      border-top: 1px solid rgba(255, 255, 255, 0.1);
      font-size: 0.9rem;
      color: rgba(255, 255, 255, 0.6);
    }

    /* 响应式设计 */
    @media (max-width: 992px) {
      .hero h1 {
        font-size: 2.8rem;
      }

      .showcase-content {
        flex-direction: column;
      }

      .nav-links li {
        margin: 0 10px;
      }
    }

    @media (max-width: 768px) {
      .navbar {
        flex-direction: column;
        padding: 15px;
      }

      .nav-links {
        margin-top: 15px;
        flex-wrap: wrap;
        justify-content: center;
      }

      .hero {
        text-align: center;
        padding: 0 5%;
      }

      .hero-content {
        margin: 0 auto;
      }

      .btn-container {
        flex-direction: column;
        align-items: center;
      }

      .hero h1 {
        font-size: 2.2rem;
      }

      .hero p {
        font-size: 1rem;
      }
    }

    .a_logo {
      color: #fff;
      text-decoration: none;
    }

    .qrcode {
      position: relative;
      /* top: 40px; */
      /* 调整二维码距离图标的高度 */
      /* left: 50%; */
      /* transform: translateX(-50%); */
      width: 120px;
      height: 120px;
      padding: 5px;
      background: white;
      border: 1px solid #ccc;
      box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
      padding: 10px;
      overflow: hidden;
      border-radius: 10px;
      /* display: block; */
      display: none;
    }

    .qrcode img {
      width: 100%;
      height: 100%;
      object-fit: cover;
      transform: scale(1.5) translate(0%, -5%);
      transform-origin: center center;
      display: block;
    }

    .social-links:hover .qrcode {
      display: block;
    }

    .nav-links-a {
      line-height: 40px;
    }

    .cta-a {
      position: relative;
    }

    .showcase-a {
      margin-top: 30px;
    }