/* 全局样式 */
        body {
            font-family: 'Open Sans', sans-serif;
            margin: 0;
            padding: 0;
            background-color: #f8f9fa;
            color: #343a40;
            line-height: 1.6;
            scroll-behavior: smooth;
        }

        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px;
        }

        a {
            color: #007bff;
            text-decoration: none;
            transition: color 0.3s ease;
        }

        a:hover {
            color: #0056b3;
        }

        h1, h2, h3 {
            font-family: 'Montserrat', sans-serif;
            color: #212529;
            margin-bottom: 20px;
        }

        h2 {
            text-align: center;
            font-size: 2.5em;
            margin-bottom: 40px;
            position: relative;
        }

        h2::after {
            content: '';
            width: 60px;
            height: 4px;
            background-color: #007bff;
            position: absolute;
            bottom: -10px;
            left: 50%;
            transform: translateX(-50%);
            border-radius: 2px;
        }

        .btn {
            display: inline-block;
            background-color: #74b4f8;
            color: #fff;
            padding: 12px 25px;
            border-radius: 5px;
            font-weight: 600;
            transition: background-color 0.3s ease, transform 0.3s ease;
        }

        .btn:hover {
            background-color: #fff;
            transform: translateY(-2px);
        }

        /* 头部导航 */
        header {
            background-color: #ffffff;
            color: #343a40;
            padding: 15px 0;
            box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
            position: sticky;
            top: 0;
            z-index: 1000;
        }

        header .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        header .logo {
            font-family: 'Montserrat', sans-serif;
            font-size: 1.8em;
            font-weight: 700;
            color: #212529;
        }

        header .logo span {
            color: #007bff;
        }

        header nav ul {
            list-style: none;
            margin: 0;
            padding: 0;
            display: flex;
        }

        header nav ul li {
            margin-left: 30px;
        }

        header nav ul li a {
            color: #555;
            font-weight: 600;
            position: relative;
            padding-bottom: 5px;
        }

        header nav ul li a::after {
            content: '';
            position: absolute;
            width: 0;
            height: 2px;
            background-color: #007bff;
            left: 0;
            bottom: 0;
            transition: width 0.3s ease;
        }

        header nav ul li a:hover::after {
            width: 100%;
        }

        .hamburger {
            display: none;
            font-size: 1.8em;
            cursor: pointer;
        }

        /* 英雄区 */
        .hero {
            background: linear-gradient(135deg, #007bff, #0056b3);
            color: #fff;
            padding: 100px 0;
            text-align: center;
            position: relative;
            overflow: hidden;
        }

        .hero::before {
            content: '';
            position: absolute;
            top: -20%;
            left: -20%;
            width: 140%;
            height: 140%;
            background: radial-gradient(circle, rgba(255, 255, 255, 0.15) 0%, rgba(255, 255, 255, 0) 70%);
            animation: rotate 20s linear infinite;
            z-index: 1;
        }

        @keyframes rotate {
            from { transform: rotate(0deg); }
            to { transform: rotate(360deg); }
        }

        .hero .container {
            position: relative;
            z-index: 2;
        }

        .hero h1 {
            color: #fff;
            font-size: 3.5em;
            margin-bottom: 20px;
            font-weight: 700;
        }

        .hero p {
            font-size: 1.3em;
            margin-bottom: 40px;
            max-width: 800px;
            margin-left: auto;
            margin-right: auto;
        }

        .hero .btn-group {
            display: flex;
            justify-content: center;
            gap: 20px;
        }

        .hero .btn-secondary {
            background-color: transparent;
            border: 2px solid #fff;
            color: #fff;
        }

        .hero .btn-secondary:hover {
            background-color: rgba(255, 255, 255, 0.2);
        }

        /* 平台优势/介绍 */
        .features-section {
            padding: 80px 0;
            background-color: #f8f9fa;
        }

        .features-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 30px;
            margin-top: 40px;
        }

        .feature-item {
            background-color: #fff;
            padding: 30px;
            border-radius: 10px;
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.08);
            text-align: center;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }

        .feature-item:hover {
            transform: translateY(-8px);
            box-shadow: 0 12px 30px rgba(0, 0, 0, 0.12);
        }

        .feature-item .icon {
            font-size: 3em;
            color: #007bff;
            margin-bottom: 20px;
        }

        .feature-item h3 {
            font-size: 1.6em;
            margin-bottom: 15px;
        }

        .feature-item p {
            font-size: 0.95em;
            color: #6c757d;
        }

        .market-section {
            padding: 80px 0;
            background-color: #e9ecef;
        }

        .market-table-container {
            background-color: #fff;
            border-radius: 10px;
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.08);
            overflow-x: auto;
        }

        .market-table {
            width: 100%;
            border-collapse: collapse;
            text-align: left;
        }

        .market-table th, .market-table td {
            padding: 15px 20px;
            border-bottom: 1px solid #dee2e6;
        }

        .market-table th {
            background-color: #f2f2f2;
            font-weight: 600;
            color: #495057;
        }

        .market-table tr:hover {
            background-color: #f5f5f5;
        }

        .market-table .price {
            font-weight: 700;
            color: #212529;
        }

        .market-table .change-positive {
            color: #28a745; /* Green */
            font-weight: 600;
        }

        .market-table .change-negative {
            color: #dc3545; /* Red */
            font-weight: 600;
        }

        .news-section {
            padding: 80px 0;
            background-color: #f8f9fa;
        }

        .news-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
            gap: 30px;
            margin-top: 40px;
        }

        .news-card {
            background-color: #fff;
            border-radius: 10px;
            box-shadow: 0 8px 25px rgba(0, 0, 0, 0.08);
            overflow: hidden;
            transition: transform 0.3s ease, box-shadow 0.3s ease;
        }

        .news-card:hover {
            transform: translateY(-8px);
            box-shadow: 0 12px 30px rgba(0, 0, 0, 0.12);
        }

        .news-card img {
            width: 100%;
            height: 200px;
            object-fit: cover;
        }

        .news-card-content {
            padding: 25px;
        }

        .news-card-content h3 {
            font-size: 1.5em;
            margin-top: 0;
            margin-bottom: 10px;
            line-height: 1.3;
        }

        .news-card-content p {
            font-size: 0.9em;
            color: #6c757d;
            margin-bottom: 15px;
        }

        .news-card-content .read-more {
            font-weight: 600;
            color: #007bff;
        }

        .news-card-content .read-more:hover {
            text-decoration: underline;
        }

        .cta-section {
            background: linear-gradient(45deg, #0056b3, #007bff);
            color: #fff;
            padding: 80px 0;
            text-align: center;
            margin-top: 50px;
        }

        .cta-section h2 {
            color: #fff;
            font-size: 2.8em;
            margin-bottom: 20px;
        }

        .cta-section p {
            font-size: 1.2em;
            margin-bottom: 40px;
            max-width: 700px;
            margin-left: auto;
            margin-right: auto;
        }

        /* 页脚 */
        footer {
            background-color: #212529;
            color: #adb5bd;
            padding: 50px 0;
            font-size: 0.9em;
        }

        footer .container {
            display: flex;
            justify-content: space-between;
            flex-wrap: wrap;
            gap: 30px;
        }

        footer .footer-col {
            flex: 1;
            min-width: 200px;
        }

        footer .footer-col h3 {
            color: #fff;
            font-size: 1.2em;
            margin-bottom: 20px;
        }

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

        footer .footer-col ul li {
            margin-bottom: 10px;
        }

        footer .footer-col ul li a {
            color: #adb5bd;
            transition: color 0.3s ease;
        }

        footer .footer-col ul li a:hover {
            color: #fff;
        }

        footer .social-icons {
            margin-top: 20px;
        }

        footer .social-icons a {
            color: #adb5bd;
            font-size: 1.8em;
            margin-right: 15px;
            transition: color 0.3s ease;
        }

        footer .social-icons a:hover {
            color: #fff;
        }

        .footer-bottom {
            text-align: center;
            margin-top: 40px;
            padding-top: 20px;
            border-top: 1px solid #343a40;
            color: #6c757d;
        }

        ul {
            list-style-type: none;
            margin: 0; /* 重置外边距 */
            padding: 0; /* 重置内边距 */
        }
        ul li{
            height: 36px;
            line-height: 36px;
            white-space: nowrap; /* 防止文本换行 */
            overflow: hidden; /* 隐藏溢出的文本 */
            text-overflow: ellipsis; /* 使用省略号表示溢出的文本 */
        }

        /* 响应式设计 */
        @media (max-width: 992px) {
            .hero h1 {
                font-size: 3em;
            }

            .hero p {
                font-size: 1.1em;
            }

            header nav ul {
                display: none; /* 默认隐藏导航，通过JS控制 */
            }

            header nav.active ul {
                display: flex;
                flex-direction: column;
                position: absolute;
                top: 80px; /* 根据header高度调整 */
                left: 0;
                width: 100%;
                background-color: #ffffff;
                box-shadow: 0 5px 15px rgba(0,0,0,0.1);
                padding: 20px 0;
                border-top: 1px solid #eee;
            }

            header nav.active ul li {
                margin: 10px 0;
                text-align: center;
            }

            .hamburger {
                display: block;
            }
        }

        @media (max-width: 768px) {
            .hero h1 {
                font-size: 2.5em;
            }

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

            .hero .btn-group {
                flex-direction: column;
                gap: 15px;
            }

            .features-grid, .news-grid {
                grid-template-columns: 1fr;
            }

            footer .container {
                flex-direction: column;
                text-align: center;
            }

            footer .footer-col {
                min-width: unset;
            }

            footer .social-icons {
                margin-top: 0;
                margin-bottom: 20px;
            }
        }

        @media (max-width: 576px) {
            h2 {
                font-size: 2em;
            }
        }