* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            font-family: "Microsoft YaHei", "Roboto", sans-serif;
            text-decoration: none;
        }

        html {
            scroll-behavior: smooth; /* 平滑滚动 */
        }

        body {
            color: #2D3748; /* 主文本色 */
            background-color: #F8F9FA; /* 页面背景浅灰 */
            overflow-x: hidden;
        }

        .container {
            width: 100%;
            max-width: 1600px; /* 大屏最大宽度 */
            margin: 0 auto;
            padding: 0 24px;
            height: 100%;
            display: flex;
            flex-direction: column;
            justify-content: center;
        }
        .banner-screen {
            height: 100vh;
            width: 100vw;
            position: relative;
            overflow: hidden;
            display: flex;
            align-items: center;
        }
        /* 通用板块样式 - 全屏高度 */
        .full-screen {
            height: 100vh;
            width: 100vw;
            position: relative;
            overflow: hidden;
            display: flex;
            align-items: center;
        }

        /* 动效基础类 - 初始隐藏 */
        .animate-element {
            opacity: 0;
            transition: all 0.8s ease-out;
        }
        /* 标题动效：从左滑入+淡入 */
        .animate-title {
            transform: translateX(-50px);
        }
        /* 内容动效：从下滑入+淡入 */
        .animate-content {
            transform: translateY(50px);
        }
        /* 动效激活状态 */
        .animate-element.active {
            opacity: 1;
            transform: translate(0, 0);
        }

        /* 下箭头样式 - 跳动动画 */
        .down-arrow {
            position: absolute;
            bottom: 40px;
            left: 50%;
            transform: translateX(-50%);
            font-size: 2rem;
            color: #70b731;
            cursor: pointer;
            animation: bounce 2s infinite;
            z-index: 10;
            border-radius: 0; /* 直角 */
        }

        @keyframes bounce {
            0%, 20%, 50%, 80%, 100% { transform: translateX(-50%) translateY(0); }
            40% { transform: translateX(-50%) translateY(-10px); }
            60% { transform: translateX(-50%) translateY(-5px); }
        }

        /* 导航栏样式 - 优化字体颜色 + 滚动渐变 + 菜单居中 + 搜索按钮 */
        .navbar {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            z-index: 999;
            transition: all 0.3s ease;
            padding: 20px 0;
            background-color: transparent;
        }

        .navbar.scrolled {
            background-color: rgba(255, 255, 255, 0.98);
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
            padding: 12px 0;
            border-bottom: 2px solid #3173b0;
        }

        .nav-wrap {
            display: flex;
            justify-content: space-between;
            align-items: center;
            max-width: 1600px;
            margin: 0 auto;
            position: relative; 
        }

        /* 导航菜单居中调整 */
        .nav-list-container {
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
        }

        .logo {
            font-size: 1.8rem;
            font-weight: 700;
            color: #fff; /* 初始白色 */
            text-decoration: none;
            transition: color 0.3s ease;
        }

        .navbar.scrolled .logo {
            color: #70b731; /* 滚动后品牌色 */
        }

        .nav-list {
            display: flex;
            list-style: none;
            gap: 40px;
        }

        .nav-link {
            text-decoration: none;
            color: #fff; /* 初始白色 */
            font-size: 1rem;
            font-weight: 600;
            transition: color 0.3s ease;
        }

        .navbar.scrolled .nav-link {
            color: #2D3748; /* 滚动后深灰色 */
        }

        .nav-link:hover, .nav-link.active {
            color: #70b731; /* 始终品牌色高亮 */
        }

        /* 搜索按钮样式 */
        .search-btn {
            background: transparent;
            border: none;
            color: #fff;
            font-size: 1.2rem;
            cursor: pointer;
            transition: color 0.3s ease;
            padding: 8px 12px;
            border-radius: 0; /* 直角 */
        }

        .navbar.scrolled .search-btn {
            color: #2D3748;
        }

        .search-btn:hover {
            color: #70b731;
        }

        .hamburger {
            display: none; /* 移动端汉堡菜单默认隐藏 */
            font-size: 1.5rem;
            cursor: pointer;
            color: #fff;
            transition: color 0.3s ease;
        }

        .navbar.scrolled .hamburger {
            color: #2D3748;
        }

        /* 英雄区样式 - 全屏 + 滚动放大背景 + 直角 */
        .hero {
            justify-content: center;
            text-align: left;
        }

        .hero-bg {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(rgba(0,0,0,0.5), rgba(22, 199, 154, 0.2)), 
                        url('/img/ba1.webp') center/cover no-repeat; /* 风电场景图 */
            z-index: -1;
            transition: transform 0.5s ease-out; /* 平滑放大 */
        }

        .hero-content {
            max-width: 900px;
            padding: 0 24px;
            z-index: 1;
        }

        .hero-title {
            font-size: clamp(2.5rem, 5vw, 3.5rem); /* 响应式字体 */
            color: #fff;
            font-weight: 700;
            margin-bottom: 20px;
            line-height: 1.2;
            text-align: left;
        }

        .hero-desc {
            font-size: clamp(1rem, 2vw, 1.2rem);
            color: #fff;
            line-height: 1.6;
            margin-bottom: 40px;
            opacity: 0.9;
            text-align: left;
        }

        .btn {
            display: inline-block;
            padding: 14px 32px;
            background-color: #1a202c;
            color: #fff;
            border-radius: 0; /* 大直角（移除圆角） */
            text-decoration: none;
            font-weight: 600;
            transition: all 0.3s ease;
            border: none;
            cursor: pointer;
        }

        .btn:hover {
            background-color: #13b087;
            transform: scale(1.02);
            box-shadow: 0 4px 15px rgba(22, 199, 154, 0.3);
        }

        /* 通用模块标题样式 - 居左 + 优势板块标题加深 */
        .section-title {
            font-size: clamp(1.8rem, 3vw, 2.5rem);
            font-weight: 700;
            color: #1A202C; /* 加深颜色，原#2D3748 */
            text-align: left;
            margin-bottom: 16px;
        }

        /* 优势板块标题：进一步加深 + 强制居左 */
        .advantage .section-title {
            color: #051029; /* 更深的颜色，解决看不清问题 */
            text-align: left !important;
            margin-bottom: 20px;
        }

        .section-subtitle {
            font-size: 1.1rem;
            color: #70b731;
            text-align: left;
            max-width: 700px;
            margin-bottom: 40px;
            line-height: 1.6;
        }

        /* 企业介绍模块 - 全屏 + 左半边渐变背景 + 内容区占1/2居左 + 直角 + 整体大背景图 */
        .about {
            background-color: #fff;
            position: relative;
            /* 新增：企业介绍整体大背景图 */
            background: url('/img/b2.webp') center/cover no-repeat;
        }

        /* ========== 新增：视频背景样式 ========== */
        .about-video-bg {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            z-index: -2; /* 层级低于蒙版 */
            object-fit: cover; /* 保持视频比例并覆盖整个区域 */
        }


        /* 背景蒙版：提升文字可读性 */
        .about-bg-mask {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: linear-gradient(to right, rgba(22, 199, 154, 0.15), rgba(22, 199, 154, 0.05));
            z-index: -1; /* 层级在视频之上，内容之下 */
        }

        .about-content {
            display: flex;
            align-items: center;
            gap: 60px;
            flex-wrap: wrap; /* 自适应换行 */
            position: relative;
            z-index: 1;
            max-width: 50%; /* 内容区占页面1/2 */
            width: 100%;
        }

        .about-text {
            flex: 1 1 400px; 
            border-radius: 0; /* 直角 */
        }

        .about-text p {
            font-size: 1.05rem;
            line-height: 1.8;
            margin-bottom: 20px;
            color: #faebd7;
        }
        /* 核心业务板块 - 全屏 + 卡片背景图 + 下半部分文字区 + 直角 */
        .business {
             background: url('/img/bg-2.png') center/cover no-repeat;
            background-color: #F8F9FA;
            
        }

        .business-cards {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr)); /* 自适应列数 */
            gap: 40px;
            width: 100%;
        }

        .business-card {
            height: 500px; /* 固定卡片高度 */
            background-color: #fff;
            border-radius: 0; /* 直角 */
            overflow: hidden;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.05);
            transition: all 0.3s ease;
            position: relative;
            /* 卡片初始状态：隐藏+右移 */
            opacity: 0;
            transform: translateX(50px);
            transition: all 0.8s ease-out;
        }

        /* 卡片激活状态：显示+归位 */
        .business-card.active {
            opacity: 1;
            transform: translateX(0);
        }

        .business-card:hover {
            transform: translateY(-10px);
            box-shadow: 0 15px 30px rgba(0, 0, 0, 0.08);
        }

        /* 业务卡片背景图 */
        .card-bg {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-size: cover;
            background-position: center;
            z-index: 0;
        }

        /* 业务1背景图 */
        .card-1 .card-bg {
            background-image: url('/img/h1.webp'); /* 金融/资本相关图 */
        }
        /* 业务2背景图 */
        .card-2 .card-bg {
            background-image: url('/img/h2.webp'); /* 风电咨询相关图 */
        }
        /* 业务3背景图 */
        .card-3 .card-bg {
            background-image: url('/img/h3.webp'); /* 能源项目相关图 */
        }

        /* 卡片文字区 - 下半部分 + 半透明背景增强可读性 + 直角 */
        .card-content {
            position: absolute;
            bottom: 0;
            left: 0;
            width: 100%;
            padding: 30px 24px;
            /* 修改：增强背景透明度，让文字更清晰 */
            background: linear-gradient(to top, rgba(255, 255, 255, 0.98), rgba(255, 255, 255, 0.8));
            z-index: 1;
        }

        .card-title {
            font-size: 1.5rem;
            font-weight: 600;
            margin-bottom: 16px;
            color: #2D3748;
        }

        .card-desc {
            font-size: 1rem;
            line-height: 1.6;
            color: #4B5563;
        }

        /* 独特优势模块 - 全屏 + 固定背景图 + 左右布局（标题1/3，卡片2/3） + 直角 */
       .advantage {
           background: url('/img/bg-1.png') center/cover no-repeat;
            background-attachment: fixed; /* 固定不滚动 */
        }

        .advantage-overlay {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background-color: rgb(255 255 255 / 80%); /* 加深蒙版，提升可读性 */
            z-index: 0;
        }

        /* 修改：优势板块容器改为flex左右布局 */
        .advantage .container {
            flex-direction: row;
            align-items: center; /* 关键修改：从flex-start改为center，实现垂直居中 */
            justify-content: center; /* 可选：水平居中（增强兼容性） */
            gap: 40px;
            height: 100%; /* 关键：确保容器高度100%，才能垂直居中 */
        }

        /* 优势板块左侧标题区：占1/3 */
        .advantage-title-wrap {
            flex: 1; /* 1/3 宽度 */
            display: flex;
            flex-direction: column;
            justify-content: center;
        }

        /* 优势板块右侧卡片区：占2/3 */
        .advantage-grid {
            flex: 2; /* 2/3 宽度 */
            display: flex;
            flex-direction: column; /* 纵向排列 */
            gap: 20px; /* 卡片间距 */
            width: 100%;
            position: relative;
            z-index: 1;
        }

        /* 优势卡片新样式：长条状 */
        .advantage-item {
            display: flex;
            align-items: center; /* 图标+文字横向对齐 */
            gap: 20px;
            padding: 30px;
            border-radius: 0; /* 直角 */
            background-color: #eeeeeea1;
            border-left: 4px solid #1a202c;
            box-shadow: 0 2px 15px rgba(0, 0, 0, 0.03);
            transition: all 0.3s ease;
            width: 100%;
            opacity: 0;
            transform: translateY(50px);
            transition: all 0.8s ease-out;
        }


        .advantage-item.active {
            opacity: 1;
            transform: translateY(0);
        }

        .advantage-item:hover {
            background-color: #F8FFFE;
            transform: translateY(-5px);
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.06);
        }

        .advantage-icon {
            width: 60px;
            height: 60px;
            display: flex;
            align-items: center;
            justify-content: center;
            flex-shrink: 0;
        }

        .advantage-icon i {
            font-size: 1.8rem;
            color: #1a202c;
        }

        .advantage-content {
            flex: 1; /* 文字区占满剩余宽度 */
        }

        .advantage-content h3 {
            font-size: 1.3rem;
            font-weight: 600;
            margin-bottom: 12px;
            color: #1A202C; /* 加深标题色 */
        }

        .advantage-content p {
            font-size: 1rem;
            line-height: 1.6;
            color: #4B5563;
        }

        /* 展望未来模块 - 全屏 + LOGO水印 + 直角 */
        .future {
            background: url('/img/b1.jpg') center/cover no-repeat;
            background-attachment: fixed; /* 固定不滚动 */
        }

        /* LOGO水印 */
        .future-watermark {
            position: absolute;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            font-size: 10rem;
            font-weight: 700;
            color: rgba(22, 199, 154, 0.05);
            z-index: 0;
            pointer-events: none; /* 不影响点击 */
        }

        .future-content {
            max-width: 800px;
            position: relative;
            z-index: 1;
            text-align: left;
        }

        .future-content p {
            font-size: 1.1rem;
            line-height: 1.8;
            color: #4B5563;
            margin-bottom: 40px;
        }

        /* 底部样式 - 丰富内容 + 直角 */
         .footer {
            background-color: #1A202C; /* 更深的底色更显沉稳大气 */
            color: #fff;
            padding: 0; /* 移除上下padding，通过flex居中控制 */
            height: 50vh; /* 半屏高度 */
            display: flex;
            flex-direction: column;
            justify-content: center; /* 垂直居中，提升大气感 */
            position: relative;
        }

        .footer-container {
            max-width: 1600px; /* 加宽容器，更显开阔 */
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); /* 加宽最小列宽 */
            gap: 80px; /* 加大列间距，更疏朗 */
            width: 100%;
            flex: 1; /* 占满footer剩余空间 */
            align-items: center; /* 垂直居中 */
        }

        .footer-col {
            display: flex;
            flex-direction: column;
            gap: 25px; /* 加大内部间距 */
        }

        .footer-logo {
            font-size: 2.5rem; /* 加大logo字体 */
            font-weight: 800; /* 加粗，更醒目 */
            color: #16C79A;
            text-decoration: none;
            letter-spacing: 1px; /* 增加字间距，更显大气 */
        }

        .footer-desc {
            color: #CBD5E1;
            line-height: 1.8; /* 加大行高，提升可读性 */
            font-size: 1.1rem; /* 加大字体 */
            max-width: 400px; /* 控制宽度，避免文字过长 */
        }

        .footer-title {
            font-size: 1.5rem; /* 加大标题字体 */
            font-weight: 700;
            margin-bottom: 20px; /* 加大底部间距 */
            color: #fff;
            position: relative;
            padding-bottom: 12px; /* 为下划线预留空间 */
        }

        /* 标题下划线装饰，提升精致感和大气度 */
        .footer-title::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: 0;
            width: 60px;
            height: 3px;
            background-color: #70b731; /* 品牌色点缀 */
            border-radius: 0; /* 保持直角风格 */
        }

        .footer-contact {
            list-style: none;
            display: flex;
            flex-direction: column;
            gap: 20px; /* 加大列表项间距 */
        }

        .footer-contact li {
            display: flex;
            align-items: center;
            gap: 15px; /* 加大图标与文字间距 */
            color: #CBD5E1;
            font-size: 1.05rem; /* 加大字体 */
            line-height: 1.8;
        }

        .footer-contact i {
            color: #ffffff;
            font-size: 1.3rem; /* 加大图标尺寸 */
        }

        .footer-social {
            display: flex;
            gap: 25px; /* 加大社交图标间距 */
            margin-top: 10px;
        }

        .footer-social a {
            width: 50px; /* 加大社交图标容器 */
            height: 50px;
            border-radius: 0; /* 保持直角 */
            background-color: rgba(255, 255, 255, 0.1);
            display: flex;
            align-items: center;
            justify-content: center;
            color: #fff;
            font-size: 1.2rem; /* 加大图标字体 */
            transition: all 0.3s ease;
            text-decoration: none;
        }

        .footer-social a:hover {
            background-color: #16C79A;
            transform: scale(1.1);
        }

        .footer-bottom {
            max-width: 1600px;
            margin: 0 auto;
            padding: 20px 40px;
            border-top: 1px solid rgba(255,255,255,0.1);
            text-align: center;
            color: #94A3B8;
            font-size: 1rem; /* 加大字体 */
            width: 100%;
        }
         .map-container {
            position: relative; /* 相对定位，让亮点可以绝对定位 */
           max-width: 100%;
           height: auto;
            border-radius: 0;
            overflow: hidden; /* 防止亮点超出容器 */
        }

        .footer-map-img {
            width: 100%;
            height: 100%;
            object-fit: cover; /* 保持图片比例 */
            filter: grayscale(20%); /* 轻微灰度，适配深色背景 */
            transition: all 0.3s ease;
        }

        .map-container:hover .footer-map-img {
            filter: grayscale(0%); /* 悬浮恢复彩色 */
        }

        /* 闪烁亮点基础样式 */
        .map-point {
            position: absolute;
            width: 16px;
            height: 16px;
            background-color: #16C79A; /* 品牌色 */
            border-radius: 50%; /* 圆形亮点 */
            transform: translate(-50%, -50%); /* 中心点对齐 */
            box-shadow: 0 0 10px rgba(22, 199, 154, 0.5);
            z-index: 2;
            /* 闪烁动画 */
            animation: pulse 2s infinite ease-in-out;
        }

        /* 亮点外圈波纹效果（增强视觉） */
        .map-point::after {
            content: '';
            position: absolute;
            width: 30px;
            height: 30px;
            border: 2px solid #16C79A;
            border-radius: 50%;
            top: 50%;
            left: 50%;
            transform: translate(-50%, -50%);
            animation: wave 2s infinite ease-in-out;
            opacity: 0;
        }

        /* 主地址亮点（赛罕区智慧能源产业园） */
        .point-main {
            top: 39%; /* 垂直居中 */
            left: 74%; /* 水平位置（可根据图片调整） */
        }

        /* 可选：添加第二个亮点（比如分公司） */
        .point-2 {
            top: 60%;
            left: 34%;
            animation-delay: 0.5s; /* 错开闪烁时间 */
        }
        .point-3 {
            top: 39%;
            left: 60%;
            animation-delay: 0.5s; /* 错开闪烁时间 */
        }
        .point-4 {
            top: 60%;
            left: 81%;
            animation-delay: 0.5s; /* 错开闪烁时间 */
        }
        .point-5 {
            top: 32%;
            left: 25%;
            animation-delay: 0.5s; /* 错开闪烁时间 */
        }
        .point-6 {
            top: 52%;
            left: 40%;
            animation-delay: 0.5s; /* 错开闪烁时间 */
        }

        /* 闪烁动画：透明度+缩放 */
        @keyframes pulse {
            0%, 100% {
                opacity: 1;
                transform: translate(-50%, -50%) scale(1);
            }
            50% {
                opacity: 0.5;
                transform: translate(-50%, -50%) scale(1.2);
            }
        }

        /* 波纹动画 */
        @keyframes wave {
            0% {
                transform: translate(-50%, -50%) scale(0.5);
                opacity: 1;
            }
            100% {
                transform: translate(-50%, -50%) scale(1.5);
                opacity: 0;
            }
        }


        .back-to-top {
            position: fixed;
            bottom: 40px;
            right: 40px;
            width: 50px;
            height: 50px;
            background-color: #1a202c;
            color: #fff;
            border-radius: 0; /* 直角 */
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 1.5rem;
            cursor: pointer;
            z-index: 998;
            opacity: 0;
            visibility: hidden;
            transition: all 0.3s ease;
            box-shadow: 0 2px 10px rgba(22, 199, 154, 0.2);
        }

        .back-to-top.show {
            opacity: 1;
            visibility: visible;
        }

        .back-to-top:hover {
            background-color: #13b087;
            transform: translateY(-3px);
        }

        /* 媒体查询 - 平板/移动端适配 */
        @media (max-width: 992px) {
            .nav-list {
                gap: 20px;
            }
            .about-content {
                gap: 30px;
                max-width: 70%; /* 移动端放宽内容区宽度 */
            }
            .business-cards {
                gap: 20px;
            }
              .advantage .container {
                flex-direction: column;
                align-items: flex-start; 
                justify-content: center; 
                height: 100%; 
            }
            .advantage-title-wrap, .advantage-grid {
                flex: 1 1 100%;
                width: 100%;
            }
            .advantage-item {
                width: 100%;
            }
        }

        @media (max-width: 768px) {
            .container {
                padding: 100px 16px;
            }
            .full-screen {
                height: 100%;
            }
            /* 移动端导航隐藏，显示汉堡菜单 */
            .nav-list-container {
                position: static;
                transform: none;
            }
             .nav-wrap {
            padding: 0 24px;
            }

             .nav-list {
                position: fixed;
                top: 0;
                /* 1. 修改：从right: 0 改为 left: 0 */
                left: 0;
                width: 250px;
                height: 100vh;
                background-color: #fff;
                flex-direction: column;
                padding: 80px 30px;
                gap: 30px;
                box-shadow: 2px 0 10px rgba(0,0,0,0.1);
                transform: translateX(-100%);
                transition: transform 0.3s ease;
                z-index: 1000; /* 新增：提升菜单层级，确保不被遮挡 */
            }

            .nav-list.show {
                /* 4. 修改：显示时归位到0，从左侧滑入 */
                transform: translateX(0);
            }
            .nav-link{
                color: #000;
            }

            .hamburger {
                display: block;
                z-index: 1001; /* 新增：提升汉堡按钮层级，确保能点击 */
            }

            .search-btn {
                display: none; /* 移动端隐藏搜索按钮，优先展示汉堡菜单 */
            }

            .business-card {
                height: 450px;
            }

            .advantage-grid {
                gap: 20px;
            }

             .footer {
                height: auto;
                padding: 60px 0;
            }
            .footer-container {
                gap: 40px;
                padding: 0 24px;
                grid-template-columns: 1fr; /* 单列布局 */
            }
            .footer-logo {
                font-size: 2rem;
            }
            .footer-title {
                font-size: 1.3rem;
            }
            .footer-social a {
                width: 45px;
                height: 45px;
            }
             .map-container {
                height: auto;
            }
            /* 移动端亮点尺寸缩小 */
            .map-point {
                width: 12px;
                height: 12px;
            }
            .map-point::after {
                width: 24px;
                height: 24px;
            }

            /* 回到顶部按钮适配移动端 */
            .back-to-top {
                width: 45px;
                height: 45px;
                bottom: 20px;
                right: 20px;
                font-size: 1.2rem;
            }
        }

        @media (max-width: 480px) {
            

            .down-arrow {
                font-size: 1.5rem;
                bottom: 20px;
            }

            .section-subtitle {
                margin-bottom: 20px;
            }

            .about-content {
                max-width: 100%; /* 小屏内容区占满宽度 */
            }

            .business-card {
                height: 400px;
            }

            .advantage-item {
                padding: 20px;
                gap: 16px;
            }

            .footer-container {
                gap: 30px;
            }
             .footer-bottom {
                padding: 15px 16px;
                font-size: 0.9rem;
            }
        }