* {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        body {
            font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
            background-color: #f8fafc;
            color: #0f172a;
            line-height: 1.5;
            scroll-behavior: smooth;
        }

        .container {
            max-width: 1280px;
            margin: 0 auto;
            padding: 0 24px;
        }

        /* 头部导航 */
        .header {
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: blur(12px);
            box-shadow: 0 1px 3px rgba(0,0,0,0.05);
            position: sticky;
            top: 0;
            z-index: 100;
            border-bottom: 1px solid rgba(226, 232, 240, 0.8);
        }
        .nav-bar {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            padding: 0.75rem 0;
        }
        .logo-img {
            height: 44px;
            width: auto;
            display: block;
        }
        .nav-links {
            display: flex;
            flex-wrap: wrap;
            gap: 0.5rem;
            background: #f1f5f9;
            padding: 0.3rem;
            border-radius: 60px;
        }
        .nav-links a {
            text-decoration: none;
            color: #1e293b;
            font-weight: 500;
            font-size: 0.9rem;
            padding: 0.5rem 1rem;
            border-radius: 40px;
            transition: all 0.2s ease;
        }
        .nav-links a:hover {
            background: #ffffff;
            color: #2563eb;
            box-shadow: 0 2px 6px rgba(0,0,0,0.05);
        }
        .btn-outline {
            background: white;
            border: 1px solid #cbd5e1;
            padding: 0.5rem 1.2rem;
            border-radius: 40px;
            color: #1e40af;
        }
        .btn-outline:hover {
            background: #eef2ff;
            border-color: #3b82f6;
        }

        /* 主内容卡片 */
        main {
            background: #ffffff;
            border-radius: 32px;
            margin: 2rem 0 3rem;
            box-shadow: 0 10px 25px -5px rgba(0,0,0,0.05);
            overflow: hidden;
        }
        article {
            padding: 2rem 2rem 2.5rem;
        }

        /* 优化 h1 */
        h1 {
            font-size: 2.6rem;
            font-weight: 800;
            margin-bottom: 1rem;
            background: linear-gradient(135deg, #0f172a 0%, #1e3a8a 40%, #3b82f6 100%);
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            letter-spacing: -0.02em;
            text-shadow: 0 2px 5px rgba(0,0,0,0.05);
        }
        /* 优化 subhead 样式 */
        .subhead {
            font-size: 1.1rem;
            color: #1e293b;
            background: linear-gradient(135deg, #f1f5f9, #eef2ff);
            border-left: 5px solid #3b82f6;
            padding: 0.8rem 1.5rem;
            border-radius: 60px;
            margin-bottom: 2rem;
            display: inline-block;
            box-shadow: 0 2px 6px rgba(0,0,0,0.03);
            font-weight: 500;
        }
        h2 {
            font-size: 1.8rem;
            font-weight: 600;
            margin-top: 2.5rem;
            margin-bottom: 1rem;
            padding-bottom: 0.5rem;
            border-bottom: 2px solid #e2e8f0;
            color: #0f172a;
            display: flex;
            align-items: center;
            gap: 10px;
        }
        h2 i {
            color: #3b82f6;
            font-size: 1.6rem;
        }
        h3 {
            font-size: 1.3rem;
            font-weight: 600;
            margin-top: 1.5rem;
            margin-bottom: 0.75rem;
            color: #1e293b;
        }
        h4 {
            font-size: 1.1rem;
            font-weight: 600;
            margin-top: 1rem;
            margin-bottom: 0.5rem;
            color: #334155;
        }
        p {
            margin-bottom: 1rem;
            color: #334155;
        }

        /* 表格与卡片 */
        .table-responsive {
            overflow-x: auto;
            margin: 1.5rem 0;
            border-radius: 20px;
            border: 1px solid #eef2ff;
        }
        table {
            width: 100%;
            border-collapse: collapse;
            font-size: 0.9rem;
        }
        th {
            background-color: #f1f5f9;
            padding: 12px 16px;
            text-align: left;
            font-weight: 600;
            color: #0f172a;
        }
        td {
            padding: 12px 16px;
            border-bottom: 1px solid #e2e8f0;
        }
        .badge {
            background: #e6f0ff;
            color: #1e40af;
            font-size: 0.7rem;
            font-weight: 600;
            padding: 0.2rem 0.7rem;
            border-radius: 20px;
            display: inline-block;
        }

        /* 卡片网格 */
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
            gap: 1.5rem;
            margin: 1.8rem 0;
        }
        .service-card {
            background: #f9fafc;
            border-radius: 24px;
            padding: 1.5rem;
            transition: all 0.2s ease;
            border: 1px solid #eef2ff;
            box-shadow: 0 1px 2px rgba(0,0,0,0.03);
        }
        .service-card i {
            font-size: 2rem;
            color: #3b82f6;
            margin-bottom: 1rem;
        }
        .service-card h4 {
            margin-top: 0;
        }
        .service-card p {
            font-size: 0.9rem;
        }

        /* 对比卡片 */
        .compare-grid {
            display: flex;
            flex-wrap: wrap;
            gap: 1.5rem;
            margin: 1.5rem 0;
        }
        .compare-card {
            flex: 1 1 200px;
            background: white;
            border-radius: 24px;
            padding: 1.2rem;
            box-shadow: 0 4px 12px rgba(0,0,0,0.05);
            border: 1px solid #e2e8f0;
            text-align: center;
        }
        .compare-card strong {
            font-size: 1.2rem;
            display: block;
        }
        .stars {
            color: #facc15;
            margin: 0.5rem 0;
        }

        /* FAQ 样式 */
        .faq-item {
            background: #ffffff;
            border: 1px solid #e2e8f0;
            border-radius: 20px;
            margin-bottom: 1rem;
            overflow: hidden;
        }
        .faq-question {
            background: #f8fafc;
            padding: 1rem 1.5rem;
            font-weight: 700;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .faq-answer {
            padding: 1rem 1.5rem;
            border-top: 1px solid #eef2ff;
            background: white;
        }

        /* 流程区域 */
        .process-img {
            background: #f1f5f9;
            border-radius: 28px;
            padding: 1.5rem;
            text-align: center;
            margin: 1rem 0;
            display: flex;
            justify-content: center;
            align-items: center;
            gap: 1rem;
            flex-wrap: wrap;
        }
        .process-step {
            background: white;
            border-radius: 40px;
            padding: 0.6rem 1.2rem;
            font-weight: 500;
            box-shadow: 0 1px 3px rgba(0,0,0,0.1);
        }
        .placeholder-img {
            background: #e2e8f0;
            border-radius: 24px;
            padding: 2rem;
            text-align: center;
            color: #475569;
            font-size: 0.9rem;
        }

        /* Banner 轮播 */
        .banner-container {
            position: relative;
            width: 100%;
            border-radius: 28px;
            overflow: hidden;
            margin: 1.8rem 0 2rem;
            box-shadow: 0 8px 20px rgba(0,0,0,0.08);
        }
        .banner-slides {
            display: flex;
            transition: transform 0.5s ease-in-out;
        }
        .banner-slide {
            flex: 0 0 100%;
            position: relative;
            min-height: 340px;
            overflow: hidden;
        }
        .banner-slide img {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            object-position: center;
            z-index: 0;
        }
        .banner-slide::after {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.55);
            z-index: 1;
        }
        .banner-content {
            position: relative;
            z-index: 2;
            text-align: center;
            color: white;
            padding: 2rem;
            max-width: 80%;
            margin: 0 auto;
            top: 50%;
            transform: translateY(-50%);
        }
        .banner-content i {
            font-size: 3rem;
            margin-bottom: 1rem;
            background: rgba(255,255,255,0.2);
            padding: 0.8rem;
            border-radius: 60px;
        }
        .banner-content h3 {
            font-size: 1.8rem;
            color: white;
            margin-bottom: 0.5rem;
        }
        .banner-content p {
            color: rgba(255,255,255,0.95);
            font-size: 1rem;
        }
        .banner-btn {
            background: #facc15;
            border: none;
            padding: 10px 24px;
            border-radius: 40px;
            font-weight: 600;
            margin-top: 1rem;
            cursor: pointer;
            color: #0f172a;
        }
        .banner-prev, .banner-next {
            position: absolute;
            top: 50%;
            transform: translateY(-50%);
            background: rgba(0,0,0,0.5);
            color: white;
            border: none;
            width: 40px;
            height: 40px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            z-index: 20;
            transition: 0.2s;
        }
        .banner-prev { left: 16px; }
        .banner-next { right: 16px; }
        .banner-prev:hover, .banner-next:hover {
            background: rgba(0,0,0,0.8);
        }
        .banner-dots {
            position: absolute;
            bottom: 16px;
            left: 0;
            right: 0;
            display: flex;
            justify-content: center;
            gap: 12px;
            z-index: 20;
        }
        .dot {
            width: 10px;
            height: 10px;
            background: rgba(255,255,255,0.5);
            border-radius: 50%;
            cursor: pointer;
            transition: 0.2s;
        }
        .dot.active {
            background: #facc15;
            width: 24px;
            border-radius: 10px;
        }

        /* CTA */
        .cta {
            background: linear-gradient(115deg, #1e293b 0%, #0f172a 100%);
            color: white;
            text-align: center;
            padding: 2.2rem;
            border-radius: 32px;
            margin: 2rem 0 1rem;
        }
        .cta h3 {
            color: white;
            margin-top: 0;
        }
        .cta-button {
            background: #facc15;
            color: #0f172a;
            border: none;
            padding: 12px 32px;
            font-weight: 700;
            font-size: 1rem;
            border-radius: 40px;
            cursor: pointer;
            transition: 0.2s;
            margin-top: 1rem;
        }
        .cta-button:hover {
            background: #eab308;
            transform: scale(1.02);
        }
        footer {
            text-align: center;
            padding: 2rem 1rem;
            color: #64748b;
            font-size: 0.8rem;
            border-top: 1px solid #e2e8f0;
            margin-top: 1rem;
        }

        /* ========= 客服弹出聊天窗口样式 ========= */
        .chat-widget {
            position: fixed;
            bottom: 24px;
            right: 24px;
            z-index: 1000;
        }
        .chat-toggle {
            width: 60px;
            height: 60px;
            background: linear-gradient(135deg, #1e3a8a, #3b82f6);
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 28px;
            cursor: pointer;
            box-shadow: 0 6px 14px rgba(0,0,0,0.2);
            transition: transform 0.2s, box-shadow 0.2s;
        }
        .chat-toggle:hover {
            transform: scale(1.05);
            box-shadow: 0 10px 20px rgba(0,0,0,0.25);
        }
        .chat-window {
            position: absolute;
            bottom: 80px;
            right: 0;
            width: 320px;
            background: white;
            border-radius: 24px;
            box-shadow: 0 20px 35px -8px rgba(0,0,0,0.2);
            overflow: hidden;
            display: none;
            flex-direction: column;
            transition: all 0.3s ease;
        }
        .chat-window.open {
            display: flex;
        }
        .chat-header {
            background: linear-gradient(115deg, #1e293b, #0f172a);
            color: white;
            padding: 1rem;
            font-weight: 600;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .chat-header span {
            font-size: 1.1rem;
        }
        .chat-close {
            cursor: pointer;
            font-size: 1.2rem;
            width: 28px;
            height: 28px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            transition: background 0.2s;
        }
        .chat-close:hover {
            background: rgba(255,255,255,0.2);
        }
        .chat-body {
            padding: 1rem;
            max-height: 320px;
            overflow-y: auto;
            background: #f9fafc;
        }
        .chat-message {
            margin-bottom: 1rem;
        }
        .chat-message p {
            background: white;
            padding: 0.6rem 1rem;
            border-radius: 20px;
            display: inline-block;
            max-width: 90%;
            margin-bottom: 0.2rem;
            box-shadow: 0 1px 2px rgba(0,0,0,0.05);
        }
        .chat-message.system p {
            background: #eef2ff;
            color: #1e40af;
        }
        .chat-input-area {
            display: flex;
            border-top: 1px solid #e2e8f0;
            background: white;
            padding: 0.5rem;
        }
        .chat-input {
            flex: 1;
            border: 1px solid #cbd5e1;
            border-radius: 40px;
            padding: 0.5rem 1rem;
            outline: none;
            font-size: 0.9rem;
        }
        .chat-send {
            background: #3b82f6;
            color: white;
            border: none;
            border-radius: 40px;
            padding: 0 1rem;
            margin-left: 0.5rem;
            cursor: pointer;
            font-weight: 600;
        }
        .chat-send:hover {
            background: #2563eb;
        }
        @media (max-width: 640px) {
            .chat-window { width: 280px; right: 0; bottom: 70px; }
            .chat-toggle { width: 50px; height: 50px; font-size: 24px; }
            h1 { font-size: 1.9rem; }
            .subhead { font-size: 0.9rem; padding: 0.5rem 1rem; }
            .nav-links { gap: 0.2rem; }
            .nav-links a { padding: 0.4rem 0.8rem; font-size: 0.8rem; }
        }