:root {
        --primary-color: #3ec6c4;
        --primary-dark: #2a7b7a;
        --light-bg: #f8f9fa;
        --text-dark: #333;
        --text-light: #fff;
      }

      * {
        margin: 0;
        padding: 0;
        box-sizing: border-box;
        font-family: "Microsoft YaHei", sans-serif;
      }

      body {
        background: linear-gradient(135deg, #f5f7fa 0%, #e4edf5 100%);
        color: var(--text-dark);
        overflow-x: hidden;
      }

      /* 头部导航 */
      header {
        background: linear-gradient(
          90deg,
          var(--primary-dark),
          var(--primary-color)
        );
        padding: 15px 5%;
        display: flex;
        justify-content: space-between;
        align-items: center;
        position: sticky;
        top: 0;
        z-index: 100;
        box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
      }

      .logo h1 {
        color: white;
        font-size: 1.8rem;
        display: flex;
        flex-direction: column;
      }

      .logo span {
        font-size: 0.8rem;
        opacity: 0.8;
      }

      nav ul {
        display: flex;
        list-style: none;
        gap: 30px;
      }

      nav a {
        color: var(--text-light);
        text-decoration: none;
        font-weight: bold;
        padding: 8px 12px;
        border-radius: 4px;
        transition: all 0.3s ease;
      }

      nav a:hover {
        background: rgba(255, 255, 255, 0.2);
      }

      .user-area {
        display: flex;
        gap: 20px;
        align-items: center;
      }

      .search-box {
        position: relative;
      }

      .search-box input {
        padding: 8px 12px;
        padding-right: 35px;
        border: none;
        border-radius: 20px;
        outline: none;
      }

      .search-box button {
        position: absolute;
        right: 8px;
        top: 50%;
        transform: translateY(-50%);
        background: none;
        border: none;
        cursor: pointer;
        color: var(--text-dark);
      }

      /* 主视觉区 */
      .hero {
        min-height: 100vh;
        background: url("https://source.unsplash.com/1600x900/?fishing,lake")
          center/cover no-repeat;
        position: relative;
        display: flex;
        align-items: center;
        justify-content: center;
        text-align: center;
        color: white;
        padding: 0 5%;
      }

      .hero::before {
        content: "";
        position: absolute;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(0, 0, 0, 0.4);
      }

      .hero-content {
        position: relative;
        max-width: 800px;
        z-index: 2;
      }

      .hero h2 {
        font-size: 3rem;
        margin-bottom: 20px;
        text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
      }

      .hero p {
        font-size: 1.2rem;
        margin-bottom: 40px;
        max-width: 600px;
        margin-left: auto;
        margin-right: auto;
      }

      /* 查询面板 */
      .query-panel {
        background: rgba(255, 255, 255, 0.85);
        padding: 30px;
        border-radius: 10px;
        max-width: 800px;
        margin: 0 auto;
        backdrop-filter: blur(5px);
      }

      .query-form {
        display: flex;
        flex-wrap: wrap;
        gap: 20px;
        justify-content: center;
        margin-bottom: 20px;
      }

      .form-group {
        flex: 1;
        min-width: 180px;
      }

      .form-group label {
        display: block;
        margin-bottom: 8px;
        font-weight: bold;
        color: var(--text-dark);
      }

      .form-group select {
        width: 100%;
        padding: 10px;
        border-radius: 5px;
        border: 1px solid #ddd;
        background: white;
        outline: none;
      }

      .btn {
        padding: 12px 35px;
        background: var(--primary-color);
        color: white;
        border: none;
        border-radius: 30px;
        font-weight: bold;
        cursor: pointer;
        transition: all 0.3s ease;
        min-width: 180px;
        font-size: 1.1rem;
      }

      .btn:hover {
        background: var(--primary-dark);
        transform: translateY(-3px);
        box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
      }

      /* 查询结果 */
      .result-card {
        background: white;
        padding: 20px;
        border-radius: 10px;
        margin-top: 20px;
        box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
        border-left: 5px solid var(--primary-color);
      }

      .result-card h3 {
        color: var(--primary-dark);
        margin-bottom: 15px;
        display: flex;
        align-items: center;
      }

      .result-card h3 span {
        margin-right: 10px;
        font-size: 1.5rem;
      }

      .result-info {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: 15px;
        margin-bottom: 20px;
      }

      .info-item {
        background: var(--light-bg);
        padding: 15px;
        border-radius: 5px;
      }

      .info-item h4 {
        color: var(--primary-dark);
        margin-bottom: 8px;
      }

      /* 功能模块 */
      .features {
        padding: 80px 5%;
        background: white;
      }

      .section-title {
        text-align: center;
        font-size: 2.5rem;
        color: var(--text-dark);
        margin-bottom: 15px;
      }

      .section-subtitle {
        text-align: center;
        max-width: 800px;
        margin: 0 auto 50px;
        font-size: 1.1rem;
        color: #666;
      }

      .feature-grid {
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
        gap: 30px;
        max-width: 1200px;
        margin: 0 auto;
      }

      .feature-card {
        background: var(--light-bg);
        padding: 30px;
        border-radius: 10px;
        text-align: center;
        transition: all 0.3s ease;
        border-bottom: 3px solid transparent;
      }

      .feature-card:hover {
        transform: translateY(-10px);
        box-shadow: 0 15px 30px rgba(0, 0, 0, 0.08);
        border-color: var(--primary-color);
      }

      .feature-icon {
        font-size: 3rem;
        margin-bottom: 20px;
        color: var(--primary-color);
      }

      .feature-card h3 {
        margin-bottom: 15px;
        font-size: 1.5rem;
      }

      .feature-card p {
        color: #666;
        line-height: 1.6;
      }

      /* 活跃鱼种 */
      .active-species {
        padding: 80px 5%;
        background: linear-gradient(to bottom, #e4edf5, #f5f7fa);
      }

      .species-container {
        display: flex;
        overflow-x: auto;
        gap: 30px;
        padding: 20px 0;
        max-width: 1200px;
        margin: 0 auto;
        scrollbar-width: thin;
        scrollbar-color: var(--primary-color) var(--light-bg);
      }

      .species-container::-webkit-scrollbar {
        height: 8px;
      }

      .species-container::-webkit-scrollbar-thumb {
        background-color: var(--primary-color);
        border-radius: 10px;
      }

      .species-card {
        min-width: 280px;
        background: white;
        border-radius: 10px;
        overflow: hidden;
        box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
      }

      .species-header {
        background: var(--primary-color);
        color: white;
        padding: 15px;
        text-align: center;
        font-weight: bold;
      }

      .species-content {
        padding: 20px;
      }

      .species-time {
        color: var(--primary-color);
        font-weight: bold;
        margin: 10px 0;
        display: flex;
        align-items: center;
      }

      .species-info {
        background: var(--light-bg);
        padding: 15px;
        border-radius: 5px;
        margin-top: 15px;
      }

      /* 备案页脚 */
      footer {
        background: var(--text-dark);
        color: var(--text-light);
        padding: 40px 5% 20px;
        text-align: center;
      }

      .footer-content {
        max-width: 1200px;
        margin: 0 auto;
      }

      .record-info {
        font-size: 0.9rem;
        margin: 20px 0;
        padding: 20px;
        background: rgba(255, 255, 255, 0.1);
        border-radius: 5px;
      }

      .footer-links {
        display: flex;
        justify-content: center;
        flex-wrap: wrap;
        gap: 30px;
        margin-top: 20px;
      }

      .footer-links a {
        color: var(--text-light);
        text-decoration: none;
        opacity: 0.7;
        transition: opacity 0.3s ease;
      }

      .footer-links a:hover {
        opacity: 1;
        text-decoration: underline;
      }

      .copyright {
        margin-top: 30px;
        font-size: 0.9rem;
        opacity: 0.6;
      }

      /* 响应式设计 */
      @media (max-width: 768px) {
        .hero h2 {
          font-size: 2rem;
        }

        nav ul {
          display: none;
        }

        .mobile-menu {
          display: block;
          color: white;
          font-size: 1.5rem;
        }

        .query-form {
          flex-direction: column;
        }

        .features,
        .active-species {
          padding: 50px 5%;
        }
      }