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

    body {
      font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
      background-color: #ffffff;
      color: #1e293b;
      min-height: 100vh;
      display: flex;
      flex-direction: column;
      -webkit-font-smoothing: antialiased;
      position: relative;
    }

    body::before {
      content: "";
      position: fixed;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background: radial-gradient(circle at 30% 20%, rgba(23, 106, 180, 0.04) 0%, transparent 45%),
                  radial-gradient(circle at 70% 60%, rgba(23, 106, 180, 0.03) 0%, transparent 50%),
                  radial-gradient(circle at 40% 80%, rgba(23, 106, 180, 0.02) 0%, transparent 45%);
      pointer-events: none;
      z-index: 0;
    }

    .page-wrapper {
      position: relative;
      z-index: 2;
      display: flex;
      flex-direction: column;
      min-height: 100vh;
    }
    .main-bg {
    position: relative;
    background: radial-gradient(circle at 20% 30%, rgba(176, 214, 252, 0.4), rgba(0, 0, 0, 0) 70%),
                radial-gradient(circle at 80% 70%, rgba(234, 199, 191, 0.3), transparent 60%),
                linear-gradient(135deg, #c2f4b3, #a8c1f6, #968ff3);
}

  /* 增加噪点纹理（CSS 模拟胶片颗粒） */
  .main-bg::before {
      content: "";
      position: absolute;
      top: 0;
      left: 0;
      width: 100%;
      height: 100%;
      background-image: repeating-radial-gradient(circle at 20% 30%, rgba(159, 210, 241, 0.03) 0px, rgba(130, 209, 236, 0.03) 2px, transparent 2px, transparent 4px);
      pointer-events: none;
  }

    /* 可选：细微的网格线 */
    .main-bg::after {
        content: "";
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        background-image: 
            linear-gradient(to right, rgba(255,255,255,0.05) 1px, transparent 1px),
            linear-gradient(to bottom, rgba(255,255,255,0.05) 1px, transparent 1px);
        background-size: 40px 40px;
        pointer-events: none;
    }
    /* ----- 导航栏 (白色玻璃) ----- */
    .navbar {
      display: flex;
      align-items: center;
      justify-content: space-between;
      padding: 1rem 2rem;
      background: rgba(255, 255, 255, 0.75);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-bottom: 0.5px solid rgba(23, 106, 180, 0.1);
      flex-shrink: 0;
      margin-bottom: 3.5rem;
    }

    /* Logo 区域：图片 + 文字，可点击 */
    .logo {
      display: flex;
      align-items: center;
      gap: 10px;
      text-decoration: none;
      transition: opacity 0.2s;
    }
    .logo:hover {
      opacity: 0.85;
    }
    .logo-img {
      height: 36px;
      width: auto;
      display: block;
    }
    .logo-text {
      font-weight: 650;
      font-size: 1.6rem;
      letter-spacing: -0.02em;
      color: #0f172a;
      line-height: 1;
    }
    .logo-text i {
      font-size: 1.6rem;
      color: #176ab4;
      margin-right: 4px;
    }

    .nav-right {
      display: flex;
      align-items: center;
      gap: 24px;
    }

    .nav-right a {
      color: #334155;
      text-decoration: none;
      font-size: 0.95rem;
      font-weight: 450;
      transition: color 0.2s;
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .nav-right a i {
      font-size: 1rem;
      opacity: 0.8;
      color: #176ab4;
    }

    .nav-right a:hover {
      color: #176ab4;
    }

    .lang-badge {
      background: rgba(23, 106, 180, 0.05);
      padding: 6px 14px;
      border-radius: 30px;
      border: 0.5px solid rgba(23, 106, 180, 0.15);
      font-size: 0.9rem;
      color: #176ab4;
    }

    .lang-badge:hover {
      background: rgba(23, 106, 180, 0.1);
      border-color: #176ab4;
    }

    /* 报名微信 二维码容器 (导航栏) */
    .wechat-wrapper {
      position: relative;
      display: inline-block;
    }
    .wechat-qrcode {
      position: absolute;
      top: 45px;
      right: 0;
      background: #ffffff;
      border-radius: 16px;
      box-shadow: 0 12px 28px rgba(0, 0, 0, 0.12);
      padding: 16px 12px 12px 12px;
      z-index: 200;
      text-align: center;
      border: 1px solid rgba(23, 106, 180, 0.15);
      width: 150px;
      opacity: 0;
      visibility: hidden;
      transform: translateY(-8px);
      transition: opacity 0.25s ease, visibility 0.25s, transform 0.25s ease;
      pointer-events: none;
    }
    .wechat-wrapper:hover .wechat-qrcode,
    .wechat-wrapper.active .wechat-qrcode {
      opacity: 1;
      visibility: visible;
      transform: translateY(0);
      pointer-events: auto;
    }
    .wechat-qrcode img {
      width: 120px;
      height: 120px;
      display: block;
      margin: 0 auto;
      border-radius: 8px;
    }
    .wechat-qrcode p {
      margin-top: 10px;
      font-size: 12px;
      color: #334155;
      font-weight: 500;
    }
    .wechat-qrcode small {
      font-size: 10px;
      color: #64748b;
      display: block;
      margin-top: 4px;
    }

    /* 底部社交区的微信二维码 (向上弹出，避免超出屏幕) */
    .footer-wechat {
      position: relative;
      display: inline-block;
    }
    .footer-wechat .wechat-qrcode {
      left: 10%;
      top: auto;
      bottom: 45px;
      right: 0;
    }
    /* 移动端调整底部二维码位置 */
    @media (max-width: 600px) {
      .footer-wechat .wechat-qrcode {
        bottom: 40px;
        right: -10px;
        width: 140px;
      }
      .footer-wechat .wechat-qrcode img {
        width: 100px;
        height: 100px;
      }
    }

    @media (max-width: 600px) {
      .navbar {
        padding: 0.9rem 1.2rem;
      }
      .nav-right {
        gap: 16px;
      }
      .logo-text {
        font-size: 1.2rem;
      }
      .logo-img {
        height: 28px;
      }
      .wechat-qrcode {
        right: -20px;
        top: 40px;
        width: 140px;
      }
      .wechat-qrcode img {
        width: 100px;
        height: 100px;
      }
    }

    /* ----- 主内容 (撑开高度，防止footer过早出现) ----- */
    .hero-section {
      flex: 1 0 auto;
      display: flex;
      flex-direction: column;
      align-items: center;
      justify-content: center;
      padding: 1.2rem 1.5rem 4rem 1.5rem;
      max-width: 1000px;
      margin: 0 auto 1rem;
      width: 100%;
    }

    .announcement-bar {
      /* background: rgba(255, 255, 255, 0.85); */
      /* backdrop-filter: blur(8px); */
      /* -webkit-backdrop-filter: blur(8px); */
      /* border: 0.5px solid rgba(23, 106, 180, 0.2); */
      /* border-radius: 40px; */
      /* padding: 0.5rem 1.2rem 0.5rem 1.8rem; */
      margin-bottom: 4.2rem;
      display: inline-flex;
      align-items: center;
      gap: 12px;
      /* box-shadow: 0 6px 14px rgba(0, 0, 0, 0.03), 0 2px 4px rgba(23, 106, 180, 0.05); */
      max-width: 100%;
    }

    .announcement-content {
      display: flex;
      align-items: center;
      flex-wrap: wrap;
      gap: 8px 12px;
      color: #1e293b;
      font-size: 0.95rem;
    }

    .new-badge {
      background: #176ab4;
      padding: 2px 10px;
      border-radius: 30px;
      font-size: 0.75rem;
      font-weight: 600;
      color: white;
      letter-spacing: 0.3px;
    }

    .announcement-link {
      color: #176ab4;
      text-decoration: none;
      font-weight: 500;
      margin-left: 4px;
      white-space: nowrap;
    }

    .announcement-link i {
      font-size: 0.8rem;
      margin-left: 4px;
    }

    .close-announce {
      color: #64748b;
      background: transparent;
      border: none;
      font-size: 1.1rem;
      cursor: pointer;
      padding: 6px;
      border-radius: 30px;
      display: flex;
      align-items: center;
      justify-content: center;
      transition: 0.2s;
      margin-left: 6px;
    }

    .close-announce:hover {
      background: rgba(23, 106, 180, 0.05);
      color: #176ab4;
    }

    .main-title {
      text-align: center;
      margin-bottom: 3rem;
    }

    .main-title h1 {
      font-size: 2.2rem;
      font-weight: 650;
      letter-spacing: -0.03em;
      background: linear-gradient(135deg, #0f172a 0%, #176ab4 85%);
      -webkit-background-clip: text;
      background-clip: text;
      color: transparent;
      line-height: 1.2;
    }

    .text-gradient {
        background: linear-gradient(90deg, #4D6BFE, #3982FF, #2498FF);
        background-clip: text;
        -webkit-background-clip: text;
        color: transparent;
        font-family: system-ui, -apple-system, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
        margin-bottom: 1.5rem;
      }

    .cta-buttons {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 20px;
      margin-bottom: 4rem;
    }

    .cta-primary, .cta-secondary {
      display: flex;
      flex-direction: column;
      align-items: center;
      padding: 2.2rem 2.8rem;
      border-radius: 15px;
      text-decoration: none;
      transition: all 0.25s;
      min-width: 320px;
    }

    .cta-primary {
      background: rgba(255, 255, 255, 0.8);
      backdrop-filter: blur(8px);
      -webkit-backdrop-filter: blur(8px);
      box-shadow: 0 8px 18px rgba(0, 0, 0, 0.03);
      border: 0.5px solid rgba(23, 106, 180, 0.2);
    }

    .cta-primary:hover {
      background: #ffffff;
      border-color: #176ab4;
      transform: translateY(-2px);
      box-shadow: 0 12px 22px rgba(23, 106, 180, 0.08);
    }

    .cta-secondary {
      background: rgba(255, 255, 255, 0.8);
      backdrop-filter: blur(8px);
      -webkit-backdrop-filter: blur(8px);
      box-shadow: 0 8px 18px rgba(0, 0, 0, 0.03);
      border: 0.5px solid rgba(23, 106, 180, 0.2);
    }

    .cta-secondary:hover {
      background: #ffffff;
      border-color: #176ab4;
      transform: translateY(-2px);
      box-shadow: 0 12px 22px rgba(23, 106, 180, 0.08);
    }

    .cta-main-text {
      font-size: 1.5rem;
      font-weight: 600;
      color: #176ab4;
      margin-bottom: 0.2rem;
    }

    .cta-sub-text {
      font-size: 0.85rem;
      opacity: 0.9;
      color: #475569;
    }

    .cta-secondary .cta-main-text {
      background: #176ab4;
      -webkit-background-clip: text;
      background-clip: text;
      color: transparent;
    }

    .cta-secondary .cta-sub-text {
      color: #475569;
    }

    .placeholder-cards {
      width: 100%;
      max-width: 700px;
      min-height: 60px;
    }

    /* ----- Footer 全新布局 (左40% + 右四栏各15%) ----- */
    .site-footer {
      background: rgba(255, 255, 255, 0.8);
      backdrop-filter: blur(12px);
      -webkit-backdrop-filter: blur(12px);
      border-top: 0.5px solid rgba(23, 106, 180, 0.1);
      padding: 3rem 2rem 2rem 2rem;
      flex-shrink: 0;
      margin-top: 5rem;
    }

    .footer-container {
      max-width: 1300px;
      margin: 0 auto;
      display: flex;
      flex-wrap: wrap;
      gap: 1rem;
    }

    /* 左侧品牌区 40% */
    .footer-brand {
      flex: 0 0 40%;
      padding-right: 2rem;
    }

    .footer-logo {
      display: flex;
      align-items: center;
      gap: 8px;
      margin-bottom: 1.2rem;
    }

    .footer-logo i {
      font-size: 2rem;
      color: #176ab4;
    }

    .footer-logo span {
      font-size: 1.5rem;
      font-weight: 650;
      color: #0f172a;
    }

    .company-desc {
      color: #475569;
      font-size: 0.9rem;
      line-height: 1.6;
      margin-bottom: 1.5rem;
      max-width: 320px;
    }

    .footer-social {
      display: flex;
      gap: 20px;
      align-items: center;
    }

    .footer-social a {
      color: #64748b;
      font-size: 1.2rem;
      transition: color 0.2s;
    }

    .footer-social a:hover {
      color: #176ab4;
    }

    /* 右侧链接区域 (总宽度60%，四栏各15%) */
    .footer-links-wrapper {
      flex: 1;
      display: flex;
      gap: 1.5rem;
      min-width: 0;
    }

    .footer-column {
      flex: 1;
      min-width: 100px;
    }

    .footer-column h4 {
      color: #0f172a;
      font-size: 0.95rem;
      font-weight: 600;
      margin-bottom: 1.2rem;
      letter-spacing: 0.3px;
    }

    .footer-column ul {
      list-style: none;
      padding: 0;
    }

    .footer-column ul li {
      margin-bottom: 0.6rem;
    }

    .footer-column ul li a {
      color: #475569;
      text-decoration: none;
      font-size: 0.85rem;
      transition: color 0.2s;
      display: inline-block;
    }

    .footer-column ul li a:hover {
      color: #176ab4;
    }

    /* 底部版权栏 (横跨整行) */
    .footer-bottom {
      max-width: 1300px;
      margin: 2.5rem auto 0 auto;
      padding-top: 1.5rem;
      border-top: 0.5px solid rgba(23, 106, 180, 0.1);
      display: flex;
      flex-wrap: wrap;
      justify-content: space-between;
      align-items: center;
      color: #64748b;
      font-size: 0.8rem;
    }

    .footer-copyright {
      display: flex;
      align-items: center;
      gap: 6px;
    }

    .footer-copyright i {
      color: #176ab4;
    }

    /* 响应式：移动端改为垂直布局 */
    @media (max-width: 900px) {
      .footer-container {
        flex-direction: column;
      }
      .footer-brand {
        flex: 0 0 100%;
        padding-right: 0;
        margin-bottom: 2rem;
      }
      .footer-links-wrapper {
        flex-wrap: wrap;
        gap: 1.5rem 1rem;
      }
      .footer-column {
        flex: 0 0 calc(50% - 0.5rem);
        min-width: 140px;
      }
    }

    @media (max-width: 600px) {
      .footer-links-wrapper {
        flex-direction: column;
        gap: 1.5rem;
      }
      .footer-column {
        flex: 1 1 100%;
      }
      .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
      }
      .main-title h1 {
        font-size: 2.8rem;
      }
      .cta-primary, .cta-secondary {
        min-width: 180px;
        padding: 1rem 1.8rem;
      }
      .cta-main-text {
        font-size: 1.3rem;
      }
    }

    @media (max-width: 480px) {
      .cta-buttons {
        flex-direction: column;
        width: 100%;
      }
      .cta-primary, .cta-secondary {
        width: 100%;
      }
      .announcement-content {
        justify-content: center;
      }
    }

    /* 动画 */
    .fade-in {
      animation: fadeSlide 0.5s ease-out;
    }
    @keyframes fadeSlide {
      0% { opacity: 0; transform: translateY(10px); }
      100% { opacity: 1; transform: translateY(0); }
    }

    .hidden {
      display: none !important;
    }