* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        html { scroll-behavior: smooth; }
        body {
            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', sans-serif;
            line-height: 1.6;
            color: #333;
            overflow-x: hidden;
            background: #fafafa;
        }
		html, body {
  overflow-x: hidden;
}


        /* 导航栏 */
      /* ===== 1. 导航栏 ===== */
nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    transition: background 0.35s ease, box-shadow 0.35s ease, color 0.35s ease;
    /* 初始状态：透明背景 + 白字 */
    background: rgba(0, 0, 0, 0.2);
    box-shadow: none;
    color: #fff;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
}

.logo {
    width: 200px; 
    height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative; /* 新增：作为绝对定位的基准 */
}

.logo img {
    width: 100%;       /* 改为百分比，适应容器 */
    height: 100%;
    object-fit: contain;
    transition: opacity 0.35s ease;
}
@media (max-width: 576px) {
  .logo {
    width: 140px;
    height: 70px;
  }
}







.default-logo {
    opacity: 1;
}

.scrolled-logo {
    opacity: 0;
    position: absolute;
    top: 0;            /* 新增：确保从顶部开始定位 */
    left: 0;
}


/* 滚动后状态：.default-logo 隐藏，.scrolled-logo 显示 */
nav.scrolled .default-logo {
    opacity: 0;
}

nav.scrolled .scrolled-logo {
    opacity: 1;
}

/* 鼠标悬停时的状态（即使未滚动也白底） */
nav:hover {
    background-color: white !important;
    color: darkblue !important;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
}

/* 鼠标悬停时也切换 logo */
nav:hover .default-logo {
    opacity: 0;
}

nav:hover .scrolled-logo {
    opacity: 1;
}







.nav-links a {
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s;
    color: inherit; /* 跟随 nav 的文字颜色 */
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: currentColor; /* 下划线颜色跟随文字颜色 */
    transition: width 0.3s;
}

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

/* 下拉菜单基本样式 */
.dropdown {
    position: relative;
}

.dropdown-icon {
    display: inline-block;
    margin-left: 5px;
    width: 12px;
    height: 12px;
    background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="currentColor"><path d="M7 10l5 5 5-5z"/></svg>') center/contain no-repeat;
    transition: transform 0.3s;
}

.dropdown:hover .dropdown-icon {
    transform: rotate(180deg);
}

/* 下拉菜单容器 */
.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    padding: 20px;
    display: none;
    opacity: 0;
    transition: opacity 0.3s, transform 0.3s;
    transform-origin: top center;
    transform: translateX(-50%) translateY(10px);
    z-index: 1000;
    color: #333;
}

.dropdown:hover .dropdown-menu {
    display: flex;
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* 下拉菜单列样式 */
.dropdown-column {
    flex: 1;
    padding: 0 15px;
    border-right: 1px solid #eee;
}

.dropdown-column:last-child {
    border-right: none;
}

.dropdown-column h3 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 15px;
    color: #333;
    padding-bottom: 8px;
    border-bottom: 1px solid #eee;
}

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

.dropdown-column li {
    margin-bottom: 10px;
}

.dropdown-column a {
    color: #666;
    text-decoration: none;
    transition: color 0.3s;
    display: block;
    padding: 5px 0;
}

.dropdown-column a:hover {
    color: #0066cc;
}

/* 滚动状态下的下拉菜单样式 */
nav.scrolled .dropdown-menu {
    background: white;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

nav.scrolled .dropdown-column h3 {
    color: #333;
}

nav.scrolled .dropdown-column a {
    color: #666;
}

nav.scrolled .dropdown-column a:hover {
    color: #0066cc;
}
/* 仅新闻中心下拉：宽度由内容撑开，最小 180px，最大 300px */
.dropdown-menu.narrow {
    width: auto;          /* 让浏览器按内容算宽 */
    min-width: 180px;
    max-width: 300px;
    padding: 15px 20px;   /* 上下左右留白少一点 */
}








/* ===== 2. 英雄区域 ===== */
.hero {
    position: relative;
	/* 抵消 nav 的高度，让它真正顶到 0 */
  margin-top: -80px;   /* 80 ≈ nav 实际高度，可根据情况微调 */
  /* 保证文字仍然垂直居中 */
    height: 100vh;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
}

.hero-video {
    position: absolute;
    top: 50%;
    left: 50%;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transform: translate(-50%, -50%);
    z-index: 0;
}

.hero-overlay {
    position: absolute;
    inset: 0;
    background: rgba(26, 35, 126, 0.35);
    z-index: 1;
}

.hero-content {
    position: relative;
    z-index: 2;
    text-align: center;
    animation: fadeInUp 1s ease;
}

/* ===== 3. 滚动后导航栏样式（通过 JS 动态添加 .scrolled 实现） ===== */
nav.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    color: #1a237e;
}


   
        .hero h1 {
            font-size: 3.5rem;
            margin-bottom: 1rem;
            font-weight: 700;
        }
        .hero p {
            font-size: 1.5rem;
            margin-bottom: 2rem;
            opacity: 0.9;
        }
        .cta-button {
            display: inline-block;
            padding: 1rem 2.5rem;
            background: white;
            color: #1a237e;
            text-decoration: none;
            border-radius: 50px;
            font-weight: 600;
            transition: transform 0.3s, box-shadow 0.3s;
            margin: 0 0.5rem;
        }
        .cta-button:hover {
            transform: translateY(-3px);
            box-shadow: 0 10px 30px rgba(0,0,0,0.2);
        }
        .cta-button.outline {
            background: transparent;
            color: white;
            border: 2px solid white;
        }
        .cta-button.outline:hover {
            background: white;
            color: #1a237e;
        }

        /* 关于我们 */
        .about {
            padding: 5rem 2rem;
            background: white;
        }
        .about-content {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 4rem;
            align-items: center;
        }
        .about-text h2 {
            font-size: 2.5rem;
            color: #1a237e;
            margin-bottom: 1.5rem;
        }
        .about-text p {
            font-size: 1.1rem;
            color: #666;
            line-height: 1.8;
            margin-bottom: 1rem;
        }
        .about-features {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 1.5rem;
            margin-top: 2rem;
        }
        .feature-item {
            display: flex;
            align-items: center;
            gap: 1rem;
        }
        .feature-item i {
            color: #1a237e;
            font-size: 1.5rem;
        }

  /* ========== 企业文化样式 ========== */
  .culture {
    padding: 5rem 2rem;
    background: #f5f5f5;
  }

  .culture-grid {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2.5rem;
  }

  .culture-card {
    background: white;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    overflow: hidden;
    transition: transform 0.3s, box-shadow 0.3s;
  }

  .culture-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 35px rgba(0, 0, 0, 0.15);
  }

  .culture-image {
    position: relative;
    height: 220px;
    overflow: hidden;
  }

  .culture-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s;
  }

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

  .overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(26, 35, 126, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3.5rem;
    color: white;
    opacity: 0;
    transition: opacity 0.3s;
  }

  .culture-card:hover .overlay {
    opacity: 1;
  }

  .culture-content {
    padding: 2rem;
    text-align: center;
  }

  .culture-content h3 {
    font-size: 1.6rem;
    margin-bottom: 1rem;
    color: #1a237e;
  }

  .culture-content p {
    font-size: 1rem;
    line-height: 1.8;
    color: #555;
  }

  @media (max-width: 768px) {
    .culture-grid {
      grid-template-columns: 1fr;
    }
  }


        /* 产品展示 */
        .products {
            padding: 5rem 2rem;
            background: white;
        }
        .product-categories {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
            gap: 2rem;
        }
        .product-category {
            background: #f8f9fa;
            padding: 2rem;
            border-radius: 10px;
            text-align: center;
            transition: transform 0.3s;
        }
        .product-category:hover {
            transform: translateY(-3px);
        }
        .product-category i {
            font-size: 3rem;
            color: #1a237e;
            margin-bottom: 1rem;
        }
        .product-category h3 {
            font-size: 1.3rem;
            margin-bottom: 0.5rem;
            color: #333;
        }
        .product-category p {
            color: #666;
            font-size: 0.9rem;
        }

        /* 统计数据 */
        .stats {
            
			background: #0a1e40 url(./investor01_bg01.png) no-repeat;
            color: white;
            padding: 4rem 2rem;
            position: relative;
            overflow: hidden;
        }
        .stats::before {
            content: '';
            position: absolute;
            top: -50%;
            right: -50%;
            width: 100%;
            height: 200%;
            background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
            animation: rotate 30s linear infinite;
        }
        @keyframes rotate {
            from { transform: rotate(0deg); }
            to { transform: rotate(360deg); }
        }
        .stats-grid {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
            gap: 2rem;
            text-align: center;
            position: relative;
            z-index: 1;
        }
        .stat-item {
            padding: 1rem;
        }
        .stat-item i {
            font-size: 2.5rem;
            margin-bottom: 1rem;
            opacity: 0.8;
        }
        .stat-item h3 {
            font-size: 3rem;
            margin-bottom: 0.5rem;
            font-weight: 700;
        }
        .stat-item p {
            opacity: 0.8;
            font-size: 1.1rem;
        }

        /* 新闻动态 */
        .news {
            padding: 5rem 2rem;
            background: #f5f5f5;
        }
        .news-grid {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
            gap: 2rem;
        }
        .news-card {
            background: white;
            border-radius: 10px;
            overflow: hidden;
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            transition: transform 0.3s;
        }
        .news-card:hover {
            transform: translateY(-3px);
        }
        .news-image {
			width: 100%;
            height: 200px;
            background: linear-gradient(135deg, #1a237e, #3949ab);
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 3rem;
			position: relative;
            overflow: hidden;
        }
        .news-content {
            padding: 1.5rem;
        }
        .news-date {
            color: #666;
            font-size: 0.9rem;
            margin-bottom: 0.5rem;
        }
        .news-title {
            font-size: 1.2rem;
            margin-bottom: 0.5rem;
            color: #333;
        }
        .news-excerpt {
            color: #666;
            font-size: 0.9rem;
            line-height: 1.6;
        }
		.btn-more{
    display:inline-block;
    padding:.75rem 2.5rem;
    background:#1a237e;
    color:#fff;
    border-radius:50px;
    font-size:1rem;
    transition:.3s;
}
.btn-more:hover{
    background:#3949ab;
    transform:translateY(-2px);
}
.news-card{
    display:block;          /* 把 a 变成块级，保持原卡片布局 */
    color:inherit;          /* 继承文字颜色，避免被链接色覆盖 */
    text-decoration:none;   /* 去掉下划线 */
}
        /* 联系我们 */
		.about-image-container {
    background-image: url('../images/jituan.jpg');
    background-size: cover;
    background-position: center;
    height: 400px;
    border-radius: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 5rem;
}
      .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
        }
        
        .section-title {
            text-align: center;
            font-size: 2.5rem;
            margin-bottom: 3rem;
            color: #1a365d;
            position: relative;
            padding-bottom: 15px;
        }
        
        .section-title::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 4px;
            background: linear-gradient(90deg, #1a365d, #2a4d8e);
            border-radius: 2px;
        }
        
        .contact-content {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 40px;
            margin-bottom: 50px;
        }
        
        .contact-info {
            background: white;
            padding: 30px;
            border-radius: 10px;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
        }
        
        .contact-info h3 {
            color: #1a365d;
            margin-bottom: 20px;
            font-size: 1.5rem;
            padding-bottom: 10px;
            border-bottom: 2px solid #e6e6e6;
        }
        
        .contact-item {
            display: flex;
            align-items: center;
            margin-bottom: 20px;
        }
        
        .contact-item i {
            width: 40px;
            height: 40px;
            background: #f0f5ff;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #2a4d8e;
            margin-right: 15px;
            font-size: 18px;
        }
        
        .contact-item span {
            font-size: 1.1rem;
            margin-right: 15px;
        }
        
        .contact-form {
            background: white;
            padding: 30px;
            border-radius: 10px;
            box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
        }
        
        .form-group {
            margin-bottom: 20px;
        }
        
        .form-group label {
            display: block;
            margin-bottom: 8px;
            font-weight: 500;
            color: #1a365d;
        }
        
        .form-group input,
        .form-group textarea {
            width: 100%;
            padding: 12px 15px;
            border: 1px solid #ddd;
            border-radius: 6px;
            font-size: 16px;
            transition: border-color 0.3s;
        }
        
        .form-group input:focus,
        .form-group textarea:focus {
            outline: none;
            border-color: #2a4d8e;
            box-shadow: 0 0 0 3px rgba(42, 77, 142, 0.2);
        }
        
        .form-group textarea {
            min-height: 120px;
            resize: vertical;
        }
        
        .btn {
            background: linear-gradient(90deg, #1a365d, #2a4d8e);
            color: white;
            border: none;
            padding: 12px 25px;
            border-radius: 6px;
            font-size: 16px;
            font-weight: 500;
            cursor: pointer;
            transition: all 0.3s;
        }
        
        .btn:hover {
            background: linear-gradient(90deg, #2a4d8e, #3a5ca9);
            transform: translateY(-2px);
            box-shadow: 0 5px 15px rgba(42, 77, 142, 0.3);
        }
        
        .social-links {
            display: flex;
            gap: 15px;
            margin-top: 20px;
        }
        
        .social-links a {
            display: flex;
            align-items: center;
            justify-content: center;
            width: 50px;
            height: 50px;
            background: #f0f5ff;
            border-radius: 50%;
            color: #2a4d8e;
            font-size: 20px;
            transition: all 0.3s;
        }
        
        .social-links a:hover {
            background: #2a4d8e;
            color: white;
            transform: translateY(-3px);
        }
        
        .map-container {
            margin-top: 40px;
       
        }
        
        .map-container iframe {
            width: 100%;
            height: 100%;
            border: none;
        }
        
        /* 老板联系方式样式 */
        .boss-contact {
            margin-top: 40px;
            background: linear-gradient(135deg, #1a365d 0%, #2a4d8e 100%);
            color: white;
            padding: 30px;
            border-radius: 10px;
            box-shadow: 0 10px 30px rgba(26, 54, 93, 0.3);
            position: relative;
            overflow: hidden;
        }
        
        .boss-contact::before {
            content: '';
            position: absolute;
            top: -50px;
            right: -50px;
            width: 200px;
            height: 200px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 50%;
            z-index: 0;
        }
        
        .boss-contact::after {
            content: '';
            position: absolute;
            bottom: -30px;
            left: -30px;
            width: 150px;
            height: 150px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 50%;
            z-index: 0;
        }
        
        .boss-header {
            display: flex;
            align-items: center;
            margin-bottom: 25px;
            position: relative;
            z-index: 1;
        }
        
        .boss-avatar {
            width: 100px;
            height: 100px;
            border-radius: 50%;
            object-fit: cover;
            margin-right: 20px;
            border: 4px solid rgba(255, 255, 255, 0.3);
        }
        
        .boss-title h3 {
            font-size: 1.8rem;
            margin-bottom: 5px;
            color: white;
        }
        
        .boss-title p {
            font-size: 1.1rem;
            opacity: 0.9;
        }
        
        .boss-info {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 20px;
            position: relative;
            z-index: 1;
        }
        
        .boss-contact-item {
            display: flex;
            align-items: center;
            padding: 15px;
            background: rgba(255, 255, 255, 0.1);
            border-radius: 8px;
            transition: all 0.3s;
        }
        
        .boss-contact-item:hover {
            background: rgba(255, 255, 255, 0.2);
            transform: translateY(-3px);
        }
        
        .boss-contact-item i {
            width: 40px;
            height: 40px;
            background: rgba(255, 255, 255, 0.2);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-right: 15px;
            font-size: 18px;
        }
        
        .boss-contact-details {
            flex: 1;
        }
        
        .boss-contact-details p {
            margin: 3px 0;
            font-size: 1.1rem;
        }
        
        .boss-contact-details .label {
            font-size: 0.9rem;
            opacity: 0.8;
        }
        
        .direct-contact-btn {
            display: inline-block;
            margin-top: 25px;
            padding: 12px 25px;
            background: white;
            color: #1a365d;
            border-radius: 6px;
            font-weight: 600;
            text-decoration: none;
            transition: all 0.3s;
            position: relative;
            z-index: 1;
        }
        
        .direct-contact-btn:hover {
            background: #f8f9fa;
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(0, 0, 0, 0.2);
        }
        
        @media (max-width: 992px) {
            .contact-content {
                grid-template-columns: 1fr;
            }
            
            .section-title {
                font-size: 2rem;
            }
            
            .boss-info {
                grid-template-columns: 1fr;
            }
        }
        
        @media (max-width: 576px) {
            body {
                padding-top: 80px;
            }
            
            .contact-info,
            .contact-form,
            .boss-contact {
                padding: 20px;
            }
            
            .section-title {
                font-size: 1.8rem;
            }
            
            .boss-header {
                flex-direction: column;
                text-align: center;
            }
            
            .boss-avatar {
                margin-right: 0;
                margin-bottom: 15px;
            }
        }

        /* 页脚 */
        footer {
            background: #0a0e27;
            color: white;
            padding: 3rem 2rem 1rem;
        }
        .footer-content {
            max-width: 1200px;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
            gap: 2rem;
            margin-bottom: 2rem;
        }
        .footer-section h4 {
            margin-bottom: 1rem;
            color: #fff;
        }
        .footer-section ul {
            list-style: none;
        }
        .footer-section ul li {
            margin-bottom: 0.5rem;
        }
        .footer-section ul li a {
            color: #ccc;
            text-decoration: none;
            transition: color 0.3s;
        }
        .footer-section ul li a:hover {
            color: white;
        }
        .social-links {
            display: flex;
            gap: 1rem;
            margin-top: 1rem;
        }
        .social-links a {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            width: 40px;
            height: 40px;
            background: #1a237e;
            color: white;
            border-radius: 50%;
            text-decoration: none;
            transition: transform 0.3s, background 0.3s;
        }
        .social-links a:hover {
            transform: translateY(-3px);
            background: #3949ab;
        }
        .footer-bottom {
            text-align: center;
            padding-top: 2rem;
            border-top: 1px solid #333;
            color: #ccc;
        }

        /* 动画 */
        @keyframes fadeInUp {
            from {
                opacity: 0;
                transform: translateY(30px);
            }
            to {
                opacity: 1;
                transform: translateY(0);
            }
        }

        /* 响应式 */
        @media (max-width: 768px) {
            .hero h1 {
                font-size: 2.5rem;
            }
            .hero p {
                font-size: 1.2rem;
            }
            .about-content,
            .contact-content {
                grid-template-columns: 1fr;
                gap: 2rem;
            }
            .about-features {
                grid-template-columns: 1fr;
            }
            .nav-links {
                display: none;
            }
            .mobile-menu-btn {
                display: block;
            }
        }