/* 重置样式 + 暗黑科技风全局变量 */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }
        :root {
            --primary: #165DFF;       /* 主科技蓝 */
            --primary-light: #4080FF; /* 浅蓝高亮 */
            --primary-glow: rgba(22, 93, 255, 0.3); /* 蓝光渐变 */
            --bg-main: #0A0E17;       /* 主背景色 */
            --bg-card: #141925;       /* 卡片背景 */
            --bg-hover: #1E2638;      /* 悬浮背景 */
            --text-main: #E5E9F2;     /* 主文字色 */
            --text-secondary: #86909C;/* 次要文字色 */
            --border: #252F48;        /* 边框色 */
            --success: #00B42A;       /* 成功色 */
            --warning: #FF7D00;       /* 警告色 */
            --radius: 8px;            /* 圆角 */
            --radius-lg: 12px;        /* 大圆角 */
            --shadow: 0 0 15px rgba(0, 0, 0, 0.3); /* 卡片阴影 */
            --shadow-glow: 0 0 20px var(--primary-glow); /* 蓝光阴影 */
            --transition: all 0.3s ease; /* 过渡效果 */
        }
        html {
            scroll-behavior: smooth;
            overflow-x: hidden;
        }
        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
            background-color: var(--bg-main);
            background-image: 
                radial-gradient(circle at 10% 20%, var(--bg-card) 0%, transparent 20%),
                radial-gradient(circle at 90% 80%, var(--bg-card) 0%, transparent 20%);
            color: var(--text-main);
            line-height: 1.8;
            font-size: 15px;
            min-height: 100vh;
            margin: 0;
            padding: 0;
        }
        a {
            text-decoration: none;
            color: inherit;
            transition: var(--transition);
        }
        ul, ol {
            list-style: none;
        }
        img {
            max-width: 100%;
            vertical-align: middle;
        }
        button {
            border: none;
            background: none;
            cursor: pointer;
            transition: var(--transition);
        }
        .container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            width: 100%;
        }

        /* 导航栏 */
        .navbar {
            position: sticky;
            top: 0;
            left: 0;
            width: 100%;
            height: 70px;
            background-color: var(--bg-card);
            border-bottom: 1px solid var(--border);
            backdrop-filter: blur(10px);
            z-index: 9999;
            display: flex;
            align-items: center;
        }
        .navbar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 100%;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 8px;
            font-size: 20px;
            font-weight: 600;
            color: var(--primary);
        }
        .logo img {
            width: 32px;
            height: 32px;
        }
        .nav-links {
            display: flex;
            align-items: center;
            gap: 32px;
        }
        .nav-links a {
            font-size: 15px;
            color: var(--text-secondary);
            font-weight: 500;
            position: relative;
        }
        .nav-links a:hover,
        .nav-links a.active {
            color: var(--primary);
        }
        .nav-links a.active::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 0;
            width: 100%;
            height: 2px;
            background: var(--primary);
            border-radius: 1px;
            box-shadow: 0 0 8px var(--primary-glow);
        }
        .desktop-cta {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .hamburger {
            display: none !important;
            cursor: pointer;
            color: var(--text-main);
            font-size: 20px;
        }
        .mobile-menu {
            display: none !important;
            background: var(--bg-card);
            border-bottom: 1px solid var(--border);
            z-index: 9999;
        }
        .mobile-nav-links {
            display: flex;
            flex-direction: column;
            gap: 16px;
            padding: 20px 0;
        }
        .mobile-nav-links a {
            font-size: 15px;
            color: var(--text-secondary);
            padding: 8px 0;
        }
        .mobile-nav-links a.active {
            color: var(--primary);
            font-weight: 500;
        }
        .mobile-cta {
            display: flex;
            gap: 12px;
            padding-bottom: 20px;
        }

        /* 顶部Banner */
        .top-banner {
            background: linear-gradient(135deg, #0F1729 0%, #141925 100%);
            background-image: 
                radial-gradient(circle at 20% 30%, rgba(22, 93, 255, 0.15) 0%, transparent 40%),
                radial-gradient(circle at 80% 70%, rgba(22, 93, 255, 0.15) 0%, transparent 40%);
            border-bottom: 1px solid var(--border);
            padding: 200px 0;
            position: static;
            overflow: hidden;
            z-index: 1;
            width: 100%;
            display: block;
        }
        .top-banner::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: url('https://www.jianguodun.com/static/jianguodun/images/jianguodun-logo.png') no-repeat;
            background-position: center;
            background-size: cover;
            opacity: 0.05;
            z-index: 1;
        }
        .banner-content {
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 20px;
            position: relative;
            z-index: 2;
            text-align: center;
        }
        .banner-title {
            font-size: 42px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 16px;
            text-shadow: 0 0 15px rgba(22, 93, 255, 0.2);
        }
        .banner-subtitle {
            font-size: 18px;
            color: var(--text-secondary);
            max-width: 800px;
            margin: 0 auto 24px;
            line-height: 1.8;
        }
        .banner-highlight {
            color: var(--primary);
            font-weight: 500;
            text-shadow: 0 0 8px var(--primary-glow);
        }

        /* 按钮样式 */
        .btn {
            display: inline-flex;
            align-items: center;
            justify-content: center;
            height: 40px;
            padding: 0 20px;
            border-radius: var(--radius);
            font-size: 14px;
            font-weight: 500;
            transition: var(--transition);
            white-space: nowrap;
            border: 1px solid transparent;
        }
        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--primary-light));
            color: white;
            box-shadow: 0 4px 12px var(--primary-glow);
        }
        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: var(--shadow-glow);
        }
        .btn-secondary {
            background: transparent;
            color: var(--primary);
            border: 1px solid var(--primary);
        }
        .btn-secondary:hover {
            background: var(--bg-hover);
            box-shadow: 0 0 10px var(--primary-glow);
        }
        .btn-banner {
            height: 48px;
            padding: 0 28px;
            font-size: 16px;
        }

        /* 退款政策头部 */
        .refund-header {
            text-align: center;
            padding: 60px 0 40px;
            position: relative;
            z-index: 1;
        }
        .refund-header h1 {
            font-size: 32px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 16px;
            position: relative;
            display: inline-block;
        }
        .refund-header h1::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 50%;
            transform: translateX(-50%);
            width: 80px;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--primary), transparent);
        }
        .refund-header p {
            color: var(--text-secondary);
            max-width: 900px;
            margin: 0 auto;
            font-size: 15px;
            line-height: 1.8;
        }
        .refund-header .tagline {
            color: var(--warning);
            margin-top: 12px;
            font-weight: 500;
            text-shadow: 0 0 8px rgba(255, 125, 0, 0.3);
        }

        /* 退款政策主体内容 */
        .refund-policy {
            max-width: 1000px;
            margin: 0 auto 60px;
            background: var(--bg-card);
            border: 1px solid var(--border);
            border-radius: var(--radius-lg);
            padding: 40px;
            box-shadow: var(--shadow);
            position: relative;
            z-index: 1;
        }
        .refund-policy h2 {
            font-size: 24px;
            color: var(--primary);
            margin-bottom: 24px;
            padding-bottom: 12px;
            border-bottom: 1px solid var(--border);
        }
        .refund-policy h3 {
            font-size: 18px;
            color: var(--text-main);
            margin: 32px 0 16px;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .refund-policy h3::before {
    content: "";
    display: inline-block;
    width: 20px;
    height: 20px;
    background: url(https://www.jianguodun.com/static/jianguodun/images/pushpin.png) no-repeat center;
    background-size: contain;
    margin-right: 6px;
    vertical-align: middle;
}
        .refund-policy p {
            color: var(--text-secondary);
            margin-bottom: 16px;
            text-align: justify;
        }
        .refund-policy .important {
            background: rgba(255, 125, 0, 0.1);
            border-left: 4px solid var(--warning);
            padding: 16px 20px;
            margin: 24px 0;
            border-radius: var(--radius);
        }
        .refund-policy .important strong {
            color: var(--warning);
        }
        .refund-policy ul {
            margin: 16px 0 24px 20px;
            list-style: disc;
            color: var(--text-secondary);
        }
        .refund-policy ul li {
            margin-bottom: 12px;
        }
        .refund-policy .process-step {
            background: var(--bg-main);
            border-radius: var(--radius);
            padding: 20px;
            margin: 20px 0;
            border-left: 3px solid var(--primary);
        }
        .refund-policy .process-step h4 {
            color: var(--primary);
            margin-bottom: 8px;
            font-size: 16px;
        }

        /* 退款申请流程 */
        .refund-process {
            max-width: 1000px;
            margin: 0 auto 60px;
            position: relative;
            z-index: 1;
        }
        .refund-process h2 {
            text-align: center;
            font-size: 28px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 40px;
            position: relative;
            display: inline-block;
            left: 50%;
            transform: translateX(-50%);
        }
        .refund-process h2::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--primary), transparent);
        }
        .process-steps {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 20px;
            position: relative;
        }
        .process-steps::before {
            content: '';
            position: absolute;
            top: 40px;
            left: 50px;
            right: 50px;
            height: 2px;
            background: linear-gradient(90deg, var(--primary), var(--border), var(--primary));
            z-index: 1;
        }
        .process-step {
            flex: 1;
            min-width: 150px;
            text-align: center;
            position: relative;
            z-index: 2;
            padding: 0 10px;
        }
        .step-number {
            width: 80px;
            height: 80px;
            border-radius: 50%;
            background: var(--bg-card);
            border: 2px solid var(--primary);
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 16px;
            font-size: 24px;
            font-weight: 700;
            color: var(--primary);
            box-shadow: 0 0 15px var(--primary-glow);
        }
        .process-step h3 {
            font-size: 16px;
            color: var(--text-main);
            margin-bottom: 8px;
        }
        .process-step p {
            font-size: 14px;
            color: var(--text-secondary);
        }

        /* 常见问题 */
        .faq {
            padding: 60px 0;
            background: var(--bg-card);
            margin: 60px 0;
            border-top: 1px solid var(--border);
            border-bottom: 1px solid var(--border);
            position: relative;
            z-index: 1;
        }
        .faq h2 {
            text-align: center;
            font-size: 28px;
            font-weight: 700;
            color: var(--text-main);
            margin-bottom: 40px;
            position: relative;
            display: inline-block;
            left: 50%;
            transform: translateX(-50%);
        }
        .faq h2::after {
            content: '';
            position: absolute;
            bottom: -8px;
            left: 50%;
            transform: translateX(-50%);
            width: 60px;
            height: 2px;
            background: linear-gradient(90deg, transparent, var(--primary), transparent);
        }
        .faq-container {
            max-width: 800px;
            margin: 0 auto;
        }
        .faq-item {
            background: var(--bg-main);
            border: 1px solid var(--border);
            border-radius: var(--radius);
            margin-bottom: 16px;
            overflow: hidden;
        }
        .faq-question {
            padding: 16px 20px;
            font-size: 16px;
            color: var(--text-main);
            font-weight: 500;
            display: flex;
            justify-content: space-between;
            align-items: center;
            cursor: pointer;
        }
        .faq-question::after {
            content: '+';
            color: var(--primary);
            font-size: 20px;
            transition: var(--transition);
        }
        .faq-item.active .faq-question::after {
            content: '-';
            transform: rotate(180deg);
        }
        .faq-answer {
            padding: 0 20px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.3s ease;
            color: var(--text-secondary);
            font-size: 14px;
            line-height: 1.8;
        }
        .faq-item.active .faq-answer {
            padding: 0 20px 20px;
            max-height: 300px;
        }

        /* 页脚 */
        .footer {
            background: var(--bg-card);
            border-top: 1px solid var(--border);
            padding: 40px 0 20px;
            margin-top: 60px;
            position: relative;
            z-index: 1;
        }
        .footer-container {
            max-width: 1100px;
            margin: 0 auto;
            padding: 0 20px;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 40px;
        }
        .footer-col {
            flex: 1;
            min-width: 200px;
        }
        .footer-col h3 {
            font-size: 18px;
            color: var(--text-main);
            margin-bottom: 20px;
            position: relative;
            padding-bottom: 8px;
        }
        .footer-col h3::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0;
            width: 40px;
            height: 2px;
            background: var(--primary);
        }
        .footer-col ul {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .footer-col ul li {
            font-size: 14px;
            color: var(--text-secondary);
            transition: var(--transition);
        }
        .footer-col ul li:hover {
            color: var(--primary);
            transform: translateX(4px);
        }
        .footer-contact {
            display: flex;
            align-items: center;
            gap: 8px;
            margin-bottom: 12px;
        }
        .footer-contact i {
            color: var(--primary);
            font-size: 16px;
        }
        .copyright {
            text-align: center;
            padding: 20px 0;
            margin-top: 40px;
            border-top: 1px solid var(--border);
            color: var(--text-secondary);
            font-size: 14px;
        }

        /* 工具类 */
        .hidden { display: none !important; }
        .text-center { text-align: center; }
        .mobile-menu.show {
            display: block !important;
        }

        /* 响应式适配 */
        @media (max-width: 992px) {
            .nav-links, .desktop-cta {
                display: none !important;
            }
            .hamburger {
                display: block !important;
            }
            .refund-header h1 {
                font-size: 26px;
            }
            .process-steps {
                flex-direction: column;
                gap: 40px;
            }
            .process-steps::before {
                display: none;
            }
            .banner-title {
                font-size: 32px;
            }
            .banner-subtitle {
                font-size: 16px;
            }
            .top-banner {
                padding: 30px 0;
            }
            .refund-header {
                padding: 40px 0 30px;
            }
            .refund-policy {
                padding: 24px;
            }
        }

        @media (max-width: 576px) {
            .banner-title {
                font-size: 26px;
            }
            .refund-policy h2 {
                font-size: 20px;
            }
            .refund-policy h3 {
                font-size: 16px;
            }
        }