/* ========== 基础重置 & 布局 ========== */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
            background: #f8fafc;
            color: #1e293b;
            line-height: 1.6;
        }

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

        /* ========== 头部 ========== */
        header {
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 16px 0;
            flex-wrap: wrap;
            gap: 12px;
            border-bottom: 1px solid #e2e8f0;
        }

        .logo-area {
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .logo-img {
            height: 48px;
            width: auto;
            display: block;
        }

        .nav-links {
            display: flex;
            gap: 20px;
            flex-wrap: wrap;
        }

        .nav-links a {
            text-decoration: none;
            color: #334155;
            font-weight: 500;
            font-size: 15px;
            transition: color 0.2s;
        }

        .nav-links a:hover {
            color: #2563eb;
        }

        /* ========== Hero ========== */
        .hero {
            position: relative;
            margin: 24px 0 32px;
            border-radius: 20px;
            overflow: hidden;
            background: #e2e8f0;
            min-height: 280px;
        }

        .hero-banner {
            width: 100%;
            height: auto;
            display: block;
            object-fit: cover;
        }

        .hero-overlay {
            position: absolute;
            inset: 0;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            text-align: center;
            padding: 20px;
            background: rgba(0, 0, 0, 0.45);
            color: #fff;
        }

        .hero-overlay h1 {
            font-size: clamp(1.4rem, 4vw, 2.6rem);
            font-weight: 700;
            margin-bottom: 10px;
            text-shadow: 0 2px 8px rgba(0, 0, 0, 0.5);
        }

        .hero-overlay .subtitle {
            font-size: clamp(0.95rem, 1.6vw, 1.2rem);
            opacity: 0.9;
            margin-bottom: 18px;
            text-shadow: 0 1px 4px rgba(0, 0, 0, 0.4);
        }

        .btn-primary {
            display: inline-block;
            background: #2563eb;
            color: #fff;
            padding: 12px 40px;
            border-radius: 40px;
            font-size: 1.1rem;
            font-weight: 600;
            text-decoration: none;
            transition: background 0.25s, transform 0.15s;
            box-shadow: 0 4px 14px rgba(37, 99, 235, 0.4);
        }

        .btn-primary:hover {
            background: #1d4ed8;
            transform: scale(1.02);
        }

        /* ========== 通用区块 ========== */
        section {
            margin: 48px 0;
        }

        .section-header {
            display: flex;
            align-items: center;
            gap: 12px;
            margin-bottom: 24px;
            flex-wrap: wrap;
        }

        .section-header h2 {
            font-size: clamp(1.3rem, 2.4vw, 1.9rem);
            font-weight: 700;
            color: #0f172a;
        }

        .section-header svg {
            flex-shrink: 0;
        }

        /* ========== 卡片网格 ========== */
        .cards-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(190px, 1fr));
            gap: 20px;
        }

        .card {
            background: #fff;
            border-radius: 16px;
            padding: 16px 14px 18px;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
            text-align: center;
            transition: transform 0.2s, box-shadow 0.2s;
            border: 1px solid #f1f5f9;
        }

        .card:hover {
            transform: translateY(-4px);
            box-shadow: 0 8px 24px rgba(0, 0, 0, 0.08);
        }

        .card img {
            width: 100%;
            max-height: 140px;
            object-fit: contain;
            border-radius: 10px;
            background: #f1f5f9;
            /* 占位背景，懒加载时可见 */
            transition: opacity 0.4s ease;
        }

        /* 懒加载图片初始透明，加载后渐显 */
        .lazy-img {
            opacity: 0;
            transition: opacity 0.5s ease;
        }

        .lazy-img.loaded {
            opacity: 1;
        }

        /* 图片占位背景色 (加载前显示) */
        .lazy-placeholder {
            background: #f1f5f9;
            min-height: 120px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: #94a3b8;
            font-size: 0.85rem;
        }

        .card h3 {
            font-size: 1.05rem;
            margin: 10px 0 4px;
            color: #0f172a;
        }

        .card p {
            font-size: 0.92rem;
            color: #475569;
        }

        .card small {
            display: block;
            margin-top: 6px;
            font-size: 0.78rem;
            color: #94a3b8;
        }

        /* ========== 场景列表 ========== */
        .scenario-list {
            list-style: none;
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 12px;
        }

        .scenario-list li {
            background: #fff;
            padding: 14px 18px;
            border-radius: 12px;
            border: 1px solid #f1f5f9;
            box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
        }

        .scenario-list li strong {
            color: #0f172a;
        }

        .scenario-list li small {
            display: block;
            color: #94a3b8;
            font-size: 0.78rem;
            margin-top: 2px;
        }

        /* ========== 步骤 ========== */
        .steps-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
            gap: 24px;
        }

        .step-item {
            background: #fff;
            border-radius: 16px;
            padding: 20px 16px 22px;
            text-align: center;
            border: 1px solid #f1f5f9;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
        }

        .step-img {
            width: 64px;
            height: 64px;
            object-fit: contain;
            margin-bottom: 10px;
            background: #f1f5f9;
            border-radius: 50%;
            padding: 8px;
        }

        .step-item h3 {
            font-size: 1.05rem;
            color: #0f172a;
        }

        .step-item small {
            display: block;
            color: #94a3b8;
            font-size: 0.8rem;
            margin-top: 4px;
        }

        /* ========== 安全 & FAQ ========== */
        .safety-list {
            list-style: none;
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
            gap: 12px;
        }

        .safety-list li {
            display: flex;
            align-items: center;
            gap: 8px;
            background: #fff;
            padding: 12px 16px;
            border-radius: 10px;
            border: 1px solid #f1f5f9;
        }

        .safety-list li img {
            width: 20px;
            height: 20px;
            flex-shrink: 0;
        }

        .keyword-tag {
            display: inline-block;
            background: #eef2ff;
            color: #2563eb;
            padding: 4px 14px;
            border-radius: 20px;
            font-size: 0.8rem;
            margin: 4px 6px 4px 0;
        }

        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 12px;
        }

        .faq-item {
            background: #fff;
            border-radius: 14px;
            padding: 16px 20px;
            border: 1px solid #f1f5f9;
            box-shadow: 0 1px 4px rgba(0, 0, 0, 0.04);
        }

        .faq-item h3 {
            font-size: 1rem;
            color: #0f172a;
            margin-bottom: 4px;
        }

        .faq-item p {
            color: #475569;
            font-size: 0.95rem;
        }

        /* ========== 评价 ========== */
        .testimonials {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
            gap: 20px;
        }

        .testimonial {
            background: #fff;
            border-radius: 16px;
            padding: 20px 22px;
            border: 1px solid #f1f5f9;
            font-style: italic;
            color: #334155;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
        }

        .testimonial .avatar {
            display: flex;
            align-items: center;
            gap: 10px;
            margin-top: 12px;
            font-style: normal;
        }

        .testimonial .avatar img {
            width: 36px;
            height: 36px;
            border-radius: 50%;
            object-fit: cover;
            background: #e2e8f0;
        }

        .testimonial .name {
            font-weight: 600;
            color: #0f172a;
        }

        /* ========== Footer ========== */
        footer {
            margin-top: 48px;
            padding: 24px 0;
            border-top: 1px solid #e2e8f0;
            text-align: center;
            color: #94a3b8;
            font-size: 0.85rem;
        }

        /* ========== 响应式 ========== */
        @media (max-width: 640px) {
            header {
                flex-direction: column;
                align-items: stretch;
                text-align: center;
            }
            .nav-links {
                justify-content: center;
            }
            .hero-overlay h1 {
                font-size: 1.2rem;
            }
            .cards-grid {
                grid-template-columns: repeat(2, 1fr);
                gap: 12px;
            }
            .card {
                padding: 12px 10px 14px;
            }
            .steps-grid {
                grid-template-columns: 1fr;
            }
            .scenario-list {
                grid-template-columns: 1fr;
            }
            .safety-list {
                grid-template-columns: 1fr;
            }
            .testimonials {
                grid-template-columns: 1fr;
            }
        }

        @media (max-width: 420px) {
            .cards-grid {
                grid-template-columns: 1fr 1fr;
                gap: 10px;
            }
        }
        
                /* ===== 移动端优化 ===== */
        @media (max-width: 640px) {
            header { flex-direction: column; align-items: stretch; text-align: center; }
            .nav-links { justify-content: center; }
            .cards-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
            .card { padding: 10px 6px 12px; }
            .hero-overlay h1 { font-size: 1.2rem; }
            .hero-overlay .subtitle { font-size: 0.85rem; }
            .btn-primary { padding: 12px 20px; min-height: 48px; min-width: 120px; font-size: 1rem; }
            .section-header h2 { font-size: 1.1rem; }
            .scenario-list { grid-template-columns: 1fr; }
            .safety-list { grid-template-columns: 1fr; }
            .steps-grid { grid-template-columns: 1fr; }
            .testimonials { grid-template-columns: 1fr; }
        }
        @media (max-width: 400px) {
            .cards-grid { grid-template-columns: 1fr 1fr; gap: 8px; }
            .card img { aspect-ratio: 1/1; }
        }

        /* 正文不小于 16px（移动端友好） */
        body { font-size: 16px; }
        .card p, .scenario-list li, .safety-list li, .faq-item p, .testimonial {
            font-size: 0.95rem;
        }
        
          /* ========================================
                   客服按钮 & 聊天窗口样式
                   ======================================== */
        /* 客服按钮 - 固定在右下角 */
        .customer-service-btn {
            position: fixed;
            bottom: 24px;
            right: 24px;
            width: 60px;
            height: 60px;
            border-radius: 50%;
            background: #2563eb;
            color: #fff;
            border: none;
            box-shadow: 0 4px 20px rgba(37, 99, 235, 0.5);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: transform 0.2s, box-shadow 0.2s;
            z-index: 1000;
            font-size: 28px;
            user-select: none;
            outline: none;
        }
        .customer-service-btn:hover {
            transform: scale(1.05);
            box-shadow: 0 6px 28px rgba(37, 99, 235, 0.6);
        }
        .customer-service-btn:active {
            transform: scale(0.95);
        }
        /* 按钮上的小提示气泡（未读消息指示） */
        .cs-badge {
            position: absolute;
            top: -4px;
            right: -4px;
            background: #ef4444;
            color: #fff;
            border-radius: 50%;
            width: 22px;
            height: 22px;
            font-size: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            font-weight: 700;
            box-shadow: 0 2px 8px rgba(239, 68, 68, 0.4);
        }

        /* 聊天窗口 */
        .chat-window {
            position: fixed;
            bottom: 100px;
            right: 24px;
            width: 360px;
            max-width: calc(100vw - 48px);
            height: 480px;
            max-height: calc(100vh - 180px);
            background: #fff;
            border-radius: 20px;
            box-shadow: 0 12px 48px rgba(0,0,0,0.2);
            display: none;
            flex-direction: column;
            overflow: hidden;
            z-index: 999;
            border: 1px solid #e2e8f0;
            transition: opacity 0.25s ease, transform 0.25s ease;
        }
        .chat-window.open {
            display: flex;
            animation: slideUp 0.3s ease;
        }
        @keyframes slideUp {
            from { opacity: 0; transform: translateY(20px) scale(0.95); }
            to { opacity: 1; transform: translateY(0) scale(1); }
        }

        /* 聊天头部 */
        .chat-header {
            background: #2563eb;
            color: #fff;
            padding: 14px 18px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-shrink: 0;
        }
        .chat-header h4 {
            font-size: 1rem;
            font-weight: 600;
            margin: 0;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .chat-header h4 span {
            background: #3b82f6;
            padding: 2px 10px;
            border-radius: 30px;
            font-size: 0.7rem;
            font-weight: 400;
        }
        .chat-close {
            background: none;
            border: none;
            color: #fff;
            font-size: 24px;
            cursor: pointer;
            line-height: 1;
            padding: 0 4px;
            opacity: 0.8;
            transition: opacity 0.2s;
        }
        .chat-close:hover { opacity: 1; }

        /* 消息区域 */
        .chat-messages {
            flex: 1;
            padding: 16px 18px;
            overflow-y: auto;
            background: #f8fafc;
            display: flex;
            flex-direction: column;
            gap: 12px;
        }
        .chat-messages .message {
            max-width: 80%;
            padding: 10px 14px;
            border-radius: 16px;
            font-size: 0.9rem;
            line-height: 1.5;
            word-break: break-word;
        }
        .chat-messages .message.bot {
            align-self: flex-start;
            background: #eef2ff;
            color: #1e293b;
            border-bottom-left-radius: 4px;
        }
        .chat-messages .message.user {
            align-self: flex-end;
            background: #2563eb;
            color: #fff;
            border-bottom-right-radius: 4px;
        }
        .chat-messages .message.typing {
            align-self: flex-start;
            background: #eef2ff;
            color: #64748b;
            padding: 10px 16px;
            border-bottom-left-radius: 4px;
            font-style: italic;
        }
        /* 输入区域 */
        .chat-input-area {
            display: flex;
            border-top: 1px solid #e2e8f0;
            padding: 8px 12px 10px;
            background: #fff;
            flex-shrink: 0;
            gap: 8px;
        }
        .chat-input-area input {
            flex: 1;
            border: 1px solid #e2e8f0;
            border-radius: 30px;
            padding: 8px 16px;
            font-size: 0.9rem;
            outline: none;
            transition: border 0.2s;
            min-height: 40px;
        }
        .chat-input-area input:focus {
            border-color: #2563eb;
            box-shadow: 0 0 0 3px rgba(37,99,235,0.15);
        }
        .chat-input-area button {
            background: #2563eb;
            color: #fff;
            border: none;
            border-radius: 30px;
            padding: 8px 18px;
            font-size: 0.9rem;
            font-weight: 500;
            cursor: pointer;
            transition: background 0.2s;
            min-height: 40px;
            white-space: nowrap;
        }
        .chat-input-area button:hover {
            background: #1d4ed8;
        }
        .chat-input-area button:active {
            transform: scale(0.96);
        }

        /* 快捷回复按钮区域 */
        .quick-replies {
            display: flex;
            flex-wrap: wrap;
            gap: 6px;
            padding: 0 18px 10px;
            background: #f8fafc;
            flex-shrink: 0;
        }
        .quick-replies button {
            background: #fff;
            border: 1px solid #e2e8f0;
            border-radius: 30px;
            padding: 6px 14px;
            font-size: 0.75rem;
            color: #2563eb;
            cursor: pointer;
            transition: all 0.2s;
            white-space: nowrap;
        }
        .quick-replies button:hover {
            background: #eef2ff;
            border-color: #2563eb;
        }
        .quick-replies button:active {
            transform: scale(0.95);
        }

        /* 响应式：在小屏上聊天窗口占更多空间 */
        @media (max-width: 480px) {
            .chat-window {
                bottom: 80px;
                right: 12px;
                width: calc(100vw - 24px);
                height: calc(100vh - 140px);
                max-height: 70vh;
            }
            .customer-service-btn {
                width: 52px;
                height: 52px;
                bottom: 16px;
                right: 16px;
                font-size: 24px;
            }
        }
        
        .site_title{
    display: none;
}
 
.promo-bar span {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 5px;
   font-size: 12px;
}