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

        body {
            font-family: 'Inter', sans-serif;
            background: #f9fafc;
            color: #1e293b;
            line-height: 1.5;
            scroll-behavior: smooth;
        }

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

        /* 头部导航 */
        .navbar {
            background: #ffffff;
            box-shadow: 0 1px 2px rgba(0,0,0,0.03), 0 1px 6px -1px rgba(0,0,0,0.05);
            position: sticky;
            top: 0;
            z-index: 100;
            backdrop-filter: blur(0px);
        }
        .nav-inner {
            display: flex;
            align-items: center;
            justify-content: space-between;
            flex-wrap: wrap;
            padding: 18px 0;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .logo-icon {
            background: linear-gradient(135deg, #2563eb, #1e40af);
            width: 38px;
            height: 38px;
            border-radius: 12px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 22px;
            box-shadow: 0 6px 12px -6px rgba(37,99,235,0.25);
        }
        .logo-text {
            font-weight: 700;
            font-size: 1.6rem;
            letter-spacing: -0.3px;
            background: linear-gradient(120deg, #0f172a, #2563eb);
            background-clip: text;
            -webkit-background-clip: text;
            color: transparent;
        }
        .nav-links {
            display: flex;
            gap: 32px;
            align-items: center;
        }
        .nav-links a {
            text-decoration: none;
            font-weight: 500;
            color: #334155;
            transition: color 0.2s;
        }
        .nav-links a:hover, .nav-links a.active {
            color: #2563eb;
        }
        .btn-outline-light {
            border: 1px solid #cbd5e1;
            padding: 8px 20px;
            border-radius: 40px;
            background: white;
            font-weight: 500;
        }
        .btn-outline-light:hover {
            background: #f1f5f9;
            border-color: #2563eb;
        }

        /* Hero 支持区域 */
        .support-hero {
            background: linear-gradient(105deg, #ffffff 0%, #f1f5fe 100%);
            padding: 70px 0 60px;
            border-bottom: 1px solid #e2e8f0;
        }
        .hero-content {
            text-align: center;
            max-width: 780px;
            margin: 0 auto;
        }
        .badge {
            display: inline-block;
            background: #e0e7ff;
            color: #1e40af;
            padding: 6px 14px;
            border-radius: 40px;
            font-size: 0.85rem;
            font-weight: 600;
            margin-bottom: 20px;
        }
        .hero-content h1 {
            font-size: 3rem;
            font-weight: 700;
            letter-spacing: -0.02em;
            background: linear-gradient(135deg, #0f172a, #1e3a8a);
            background-clip: text;
            -webkit-background-clip: text;
            color: transparent;
            margin-bottom: 20px;
        }
        .hero-content p {
            font-size: 1.2rem;
            color: #475569;
            margin-bottom: 32px;
        }
        .search-support {
            max-width: 580px;
            margin: 0 auto;
            display: flex;
            background: white;
            border-radius: 60px;
            border: 1px solid #e2e8f0;
            box-shadow: 0 8px 20px -8px rgba(0,0,0,0.05);
            overflow: hidden;
            transition: 0.2s;
        }
        .search-support input {
            flex: 1;
            padding: 16px 24px;
            border: none;
            font-size: 1rem;
            outline: none;
            font-family: 'Inter', sans-serif;
        }
        .search-support button {
            background: #2563eb;
            border: none;
            padding: 0 28px;
            color: white;
            font-weight: 600;
            cursor: pointer;
            transition: background 0.2s;
            font-size: 1rem;
            display: flex;
            align-items: center;
            gap: 8px;
        }
        .search-support button:hover {
            background: #1d4ed8;
        }

        /* 快速入口卡片 */
        .quick-support {
            padding: 70px 0 50px;
        }
        .section-title {
            text-align: center;
            font-size: 2rem;
            font-weight: 700;
            margin-bottom: 16px;
        }
        .section-desc {
            text-align: center;
            color: #5b6e8c;
            max-width: 640px;
            margin: 0 auto 48px;
        }
        .card-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
            gap: 32px;
        }
        .service-card {
            background: white;
            border-radius: 28px;
            padding: 32px 28px;
            transition: all 0.25s ease;
            box-shadow: 0 4px 12px rgba(0,0,0,0.02), 0 1px 2px rgba(0,0,0,0.03);
            border: 1px solid #eef2ff;
            text-align: center;
        }
        .service-card:hover {
            transform: translateY(-6px);
            border-color: #cbdffc;
            box-shadow: 0 20px 30px -12px rgba(0,0,0,0.1);
        }
        .card-icon {
            width: 70px;
            height: 70px;
            background: #eef2ff;
            border-radius: 24px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin: 0 auto 24px;
            font-size: 32px;
            color: #2563eb;
        }
        .service-card h3 {
            font-size: 1.5rem;
            margin-bottom: 12px;
        }
        .service-card p {
            color: #5b6e8c;
            margin-bottom: 24px;
        }
        .card-link {
            font-weight: 600;
            color: #2563eb;
            text-decoration: none;
            display: inline-flex;
            align-items: center;
            gap: 6px;
        }
        .card-link i {
            transition: transform 0.2s;
        }
        .card-link:hover i {
            transform: translateX(4px);
        }

        /* 工单与知识库双栏 */
        .resources-section {
            background: #ffffff;
            padding: 70px 0;
            border-top: 1px solid #eef2ff;
            border-bottom: 1px solid #eef2ff;
        }
        .two-columns {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 48px;
        }
        .info-panel {
            background: #f8fafd;
            border-radius: 32px;
            padding: 36px 32px;
            border: 1px solid #e9edf2;
        }
        .info-panel h3 {
            font-size: 1.7rem;
            margin-bottom: 20px;
            display: flex;
            align-items: center;
            gap: 12px;
        }
        .ticket-form .input-group {
            margin-bottom: 20px;
        }
        .input-group input, .input-group textarea, .input-group select {
            width: 100%;
            padding: 14px 18px;
            border: 1px solid #cfdfed;
            border-radius: 20px;
            font-family: 'Inter', sans-serif;
            font-size: 0.95rem;
            background: white;
            transition: 0.2s;
        }
        .input-group input:focus, .input-group textarea:focus {
            outline: none;
            border-color: #2563eb;
            box-shadow: 0 0 0 3px rgba(37,99,235,0.1);
        }
        .btn-primary {
            background: #2563eb;
            color: white;
            border: none;
            padding: 12px 28px;
            border-radius: 40px;
            font-weight: 600;
            font-size: 1rem;
            cursor: pointer;
            transition: background 0.2s;
        }
        .btn-primary:hover {
            background: #1e40af;
        }
        .kb-list {
            list-style: none;
            margin-top: 20px;
        }
        .kb-list li {
            margin-bottom: 18px;
            border-bottom: 1px solid #e2edf7;
            padding-bottom: 12px;
        }
        .kb-list a {
            text-decoration: none;
            font-weight: 500;
            color: #1f2a44;
            display: flex;
            justify-content: space-between;
            align-items: center;
        }
        .kb-list a:hover {
            color: #2563eb;
        }
        .faq-preview {
            margin-top: 32px;
        }
        .faq-item {
            margin-top: 20px;
        }
        .faq-question {
            font-weight: 600;
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            background: white;
            padding: 14px 18px;
            border-radius: 20px;
            border: 1px solid #e2edf7;
        }
        .faq-answer {
            padding: 12px 18px 0 18px;
            color: #4a5a72;
            font-size: 0.9rem;
            display: none;
        }
        .faq-item.active .faq-answer {
            display: block;
        }

        /* 联系方式区域 */
        .contact-section {
            padding: 70px 0;
        }
        .contact-flex {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 40px;
            margin-top: 30px;
        }
        .contact-card {
            background: white;
            border-radius: 28px;
            padding: 28px 32px;
            text-align: center;
            min-width: 210px;
            flex: 1;
            border: 1px solid #eef2ff;
            transition: 0.2s;
        }
        .contact-card i {
            font-size: 2.5rem;
            color: #2563eb;
            margin-bottom: 16px;
        }
        .contact-card h4 {
            font-size: 1.2rem;
            margin-bottom: 8px;
        }
        .contact-card p {
            color: #3b4e6e;
        }
        .contact-card a {
            color: #2563eb;
            text-decoration: none;
            font-weight: 500;
        }

        /* 页脚 */
        .footer {
            background: #0f172a;
            color: #cbd5e6;
            padding: 48px 0 32px;
            margin-top: 20px;
        }
        .footer-inner {
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 32px;
        }
        .footer-copyright {
            text-align: center;
            padding-top: 40px;
            border-top: 1px solid #1e293b;
            margin-top: 32px;
            font-size: 0.85rem;
        }
        @media (max-width: 780px) {
            .two-columns {
                grid-template-columns: 1fr;
            }
            .hero-content h1 {
                font-size: 2.2rem;
            }
            .nav-inner {
                flex-direction: column;
                gap: 16px;
            }
        }
        .toast-msg {
            visibility: hidden;
            min-width: 220px;
            background-color: #1e293b;
            color: #fff;
            text-align: center;
            border-radius: 40px;
            padding: 12px 20px;
            position: fixed;
            bottom: 30px;
            left: 50%;
            transform: translateX(-50%);
            font-size: 0.9rem;
            z-index: 1000;
            opacity: 0;
            transition: opacity 0.3s;
        }
        .toast-msg.show {
            visibility: visible;
            opacity: 1;
        }