/* 全局重置 & 基础样式 */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        :root {
            --main-color: #2d8cf0;
            --main-hover: #1c7ed6;
            --bg-color: #f5f7fa;
            --card-bg: #fff;
            --text-main: #333;
            --text-secondary: #666;
            --text-light: #999;
            --border-color: #e5e6eb;
            --shadow: 0 2px 10px rgba(0,0,0,0.06);
            --radius: 6px;
            --transition: all 0.2s ease;
        }

        body {
            font-family: "Microsoft Yahei", Arial, sans-serif;
            background-color: var(--bg-color);
            color: var(--text-main);
            line-height: 1.5;
        }

        .container {
            width: 100%;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 15px;
        }

        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }

        /* 头部导航 */
        .header {
            background-color: var(--card-bg);
            border-bottom: 1px solid var(--border-color);
            position: sticky;
            top: 0;
            z-index: 999;
        }

        .header .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            height: 60px;
        }

        .logo {
            font-size: 20px;
            font-weight: bold;
            color: var(--main-color);
        }

        .logo span {
            color: var(--text-main);
        }

        .nav-main {
            display: flex;
        }

        .nav-main a {
            display: inline-block;
            padding: 0 15px;
            height: 60px;
            line-height: 60px;
            font-size: 14px;
            color: var(--text-secondary);
        }

        .nav-main a.active,
        .nav-main a:hover {
            color: var(--main-color);
            border-bottom: 2px solid var(--main-color);
        }

.banner-btns {
    margin-top: 24px;
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}
.banner-btn {
    padding: 12px 28px;
    border-radius: 6px;
    font-size: 16px;
    text-decoration: none;
    transition: all 0.2s ease;
    font-weight: 500;
}
/* 主按钮：纯白，在蓝色背景非常醒目 */
.banner-btn.primary {
    background: #ffffff;
    color: #2563eb;
    border: 2px solid #fff;
}
.banner-btn.primary:hover {
    background: #f0f0f0;
}
/* 副按钮：金色描边，和白色主按钮区分开 */
.banner-btn.outline {
    background: transparent;
    color: #ffd700;
    border: 2px solid #ffd700;
}
.banner-btn.outline:hover {
    background: rgba(255, 215, 0, 0.18);
}

        /* 移动端菜单按钮 */
        .menu-toggle {
            display: none;
            width: 30px;
            height: 30px;
            align-items: center;
            justify-content: center;
            cursor: pointer;
        }

        .menu-toggle span {
            display: block;
            width: 22px;
            height: 2px;
            background-color: var(--text-main);
            position: relative;
        }

        .menu-toggle span::before,
        .menu-toggle span::after {
            content: '';
            position: absolute;
            width: 22px;
            height: 2px;
            background-color: var(--text-main);
            left: 0;
        }

        .menu-toggle span::before {
            top: -7px;
        }

        .menu-toggle span::after {
            bottom: -7px;
        }

        /* 横幅区域 */
        .banner {
            background: linear-gradient(135deg, var(--main-color), #5cadff);
            padding: 40px 0;
            color: #fff;
            text-align: center;
        }

        .banner h2 {
            font-size: 28px;
            margin-bottom: 10px;
            font-weight: normal;
        }

        .banner p {
            font-size: 14px;
            opacity: 0.9;
            margin-bottom: 25px;
        }

        /* 新增按钮容器样式 */
        .banner-btns {
            display: flex;
            justify-content: center;
            gap: 18px;
            margin-top: 10px;
        }

        .banner-btn {
            display: inline-block;
            padding: 10px 28px;
            border-radius: 8px;
            font-size: 15px;
            font-weight: 500;
            cursor: pointer;
            border: none;
            transition: all 0.3s ease;
            box-shadow: 0 4px 12px rgba(0,0,0,0.1);
        }

        .banner-btn.primary {
            background-color: #fff;
            color: var(--main-color);
        }

        .banner-btn.primary:hover {
            background-color: #f8f9fa;
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(0,0,0,0.15);
        }

        .banner-btn.secondary {
            background-color: rgba(255,255,255,0.25);
            color: #fff;
            border: 1px solid rgba(255,255,255,0.8);
            backdrop-filter: blur(4px);
        }

        .banner-btn.secondary:hover {
            background-color: rgba(255,255,255,0.35);
            transform: translateY(-2px);
            box-shadow: 0 6px 16px rgba(0,0,0,0.15);
        }

        /* 核心导航区域 */
        .nav-section {
            padding: 30px 0;
        }

        .section-title {
            text-align: center;
            margin-bottom: 25px;
        }

        .section-title h3 {
            font-size: 20px;
            color: var(--text-main);
            margin-bottom: 8px;
        }

        .section-title p {
            font-size: 13px;
            color: var(--text-light);
        }

        /* 游戏导航网格 */
        .game-grid {
            display: grid;
            grid-template-columns: repeat(6, 1fr);
            gap: 15px;
        }

        .game-card {
            background-color: var(--card-bg);
            border-radius: var(--radius);
            padding: 15px 10px;
            text-align: center;
            box-shadow: var(--shadow);
            transition: var(--transition);
        }

        .game-card:hover {
            transform: translateY(-3px);
            box-shadow: 0 5px 15px rgba(0,0,0,0.1);
            border: 1px solid var(--main-color);
        }

        .game-icon {
            width: 48px;
            height: 48px;
            margin: 0 auto 10px;
            border-radius: 50%;
            overflow: hidden;
        }

        .game-icon img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        .game-name {
            font-size: 13px;
            margin-bottom: 8px;
            color: var(--text-main);
        }

        .game-btn {
            font-size: 12px;
            color: var(--main-color);
            padding: 3px 8px;
            border-radius: 3px;
            border: 1px solid var(--main-color);
            display: inline-block;
        }

        .game-btn:hover {
            background-color: var(--main-color);
            color: #fff;
        }

        /* 系统兼容区域 */
        .system-section {
            padding: 20px 0 30px;
            background-color: var(--card-bg);
            margin-bottom: 30px;
        }

        .system-grid {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 20px;
            text-align: center;
        }

        .system-card {
            padding: 20px 0;
        }

        .system-icon {
            width: 60px;
            height: 60px;
            margin: 0 auto 10px;
        }

        .system-name {
            font-size: 16px;
            margin-bottom: 5px;
        }

        .system-desc {
            font-size: 12px;
            color: var(--text-light);
        }

        /* 教程区域 */
        .tutorial-section {
            padding: 20px 0 40px;
        }

        .tutorial-steps {
            display: flex;
            justify-content: space-between;
            background-color: var(--card-bg);
            padding: 20px;
            border-radius: var(--radius);
            box-shadow: var(--shadow);
        }

        .step-item {
            flex: 1;
            text-align: center;
            position: relative;
        }

        .step-item:not(:last-child)::after {
            content: '';
            position: absolute;
            top: 18px;
            right: -15px;
            width: 20px;
            height: 1px;
            background-color: var(--border-color);
        }

        .step-num {
            width: 36px;
            height: 36px;
            line-height: 36px;
            border-radius: 50%;
            background-color: var(--main-color);
            color: #fff;
            font-size: 16px;
            margin: 0 auto 10px;
        }

        .step-title {
            font-size: 14px;
            margin-bottom: 5px;
        }

        .step-desc {
            font-size: 12px;
            color: var(--text-light);
        }

        /* 底部 */
        .footer {
            background-color: var(--card-bg);
            border-top: 1px solid var(--border-color);
            padding: 20px 0;
            text-align: center;
            font-size: 13px;
            color: var(--text-light);
        }

        /* 响应式适配 */
        @media (max-width: 1024px) {
            .game-grid {
                grid-template-columns: repeat(4, 1fr);
            }
        }

        @media (max-width: 768px) {
            .nav-main {
                display: none;
            }

            .menu-toggle {
                display: flex;
            }

            .game-grid {
                grid-template-columns: repeat(3, 1fr);
            }

            .tutorial-steps {
                flex-wrap: wrap;
            }

            .step-item {
                flex: 0 0 50%;
                margin-bottom: 15px;
            }

            .step-item:nth-child(2)::after {
                display: none;
            }

            .step-item:not(:last-child)::after {
                display: none;
            }

            /* 移动端按钮适配 */
            .banner-btns {
                flex-direction: column;
                gap: 12px;
                padding: 0 30px;
            }

            .banner-btn {
                padding: 10px 20px;
                width: 100%;
            }
        }

        @media (max-width: 480px) {
            .game-grid {
                grid-template-columns: repeat(3, 1fr);
            }

            .system-grid {
                grid-template-columns: 1fr;
            }

            .step-item {
                flex: 0 0 100%;
            }

            .banner h2 {
                font-size: 22px;
            }
        }