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

        :root {
            --primary: #4a6fa5;
            --primary-dark: #3a5a8c;
            --primary-light: #eef3fc;
            --accent: #c9a03d;
            --accent-light: #fef6e6;
            --bg-body: #f8fafc;
            --bg-card: #ffffff;
            --bg-soft: #f9fbfd;
            --text-dark: #1f2a44;
            --text-mid: #4a5b7a;
            --text-light: #8a9bb5;
            --border: #e9edf4;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.02), 0 1px 2px rgba(0, 0, 0, 0.03);
            --shadow-md: 0 8px 20px rgba(0, 0, 0, 0.04);
            --radius-lg: 28px;
            --radius-md: 20px;
            --radius-sm: 14px;
        }

        body {
            font-family: 'Inter', sans-serif;
            background: var(--bg-body);
            color: var(--text-dark);
            line-height: 1.5;
        }

        /* 顶部通告栏 */
        .top-bar {
            background: var(--primary-dark);
            color: white;
            padding: 8px 20px;
            text-align: center;
            font-size: 13px;
        }
        .top-bar span {
            margin: 0 16px;
        }

        /* 导航栏 */
        .navbar {
            background: rgba(255, 255, 255, 0.96);
            backdrop-filter: blur(12px);
            border-bottom: 1px solid var(--border);
            position: sticky;
            top: 0;
            z-index: 100;
        }
        .nav-container {
            max-width: 1600px;
            margin: 0 auto;
            padding: 12px 28px;
            display: flex;
            justify-content: space-between;
            align-items: center;
            flex-wrap: wrap;
            gap: 16px;
        }
        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            text-decoration: none;
        }
        .logo-icon {
            font-size: 30px;
        }
        .logo-text {
            font-size: 24px;
            font-weight: 800;
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
        }
        .nav-links {
            display: flex;
            gap: 28px;
            align-items: center;
            flex-wrap: wrap;
        }
        .nav-links a {
            text-decoration: none;
            color: var(--text-mid);
            font-weight: 500;
            transition: 0.2s;
            font-size: 15px;
        }
        .nav-links a:hover {
            color: var(--primary);
        }
        .nav-links a.active {
            color: var(--primary);
            font-weight: 700;
            border-bottom: 2px solid var(--primary);
            padding-bottom: 4px;
        }
        .order-query {
            background: var(--primary-light);
            padding: 6px 16px;
            border-radius: 40px;
            color: var(--primary-dark) !important;
        }
        .cart-icon {
            background: white;
            width: 38px;
            height: 38px;
            display: inline-flex;
            align-items: center;
            justify-content: center;
            border-radius: 40px;
            box-shadow: var(--shadow-sm);
            font-size: 18px;
        }

        @media (max-width: 768px) {
            .nav-container {
                flex-direction: column;
                padding: 12px 20px;
            }
            .nav-links {
                justify-content: center;
                gap: 18px;
            }
        }

        /* 主容器 — 无侧栏，全宽内容 */
        .faq-container {
            max-width: 1280px;
            margin: 40px auto;
            padding: 0 28px;
        }

        /* 页面标题区 */
        .page-header {
            text-align: center;
            margin-bottom: 48px;
        }
        .page-header h1 {
            font-size: 38px;
            font-weight: 800;
            background: linear-gradient(135deg, var(--primary-dark), var(--primary));
            -webkit-background-clip: text;
            background-clip: text;
            color: transparent;
            margin-bottom: 16px;
        }
        .page-header p {
            color: var(--text-mid);
            font-size: 18px;
            max-width: 600px;
            margin: 0 auto;
        }

        /* 搜索 + 分类筛选 */
        .faq-toolbar {
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            padding: 20px 28px;
            margin-bottom: 32px;
            display: flex;
            flex-wrap: wrap;
            align-items: center;
            justify-content: space-between;
            gap: 20px;
            box-shadow: var(--shadow-sm);
        }
        .search-box {
            flex: 2;
            min-width: 220px;
            display: flex;
            align-items: center;
            background: var(--bg-body);
            border-radius: 60px;
            padding: 8px 18px;
            border: 1px solid var(--border);
            transition: 0.2s;
        }
        .search-box i {
            color: var(--text-light);
            margin-right: 10px;
            font-size: 18px;
        }
        .search-box input {
            border: none;
            background: transparent;
            width: 100%;
            font-size: 15px;
            outline: none;
            font-family: 'Inter', sans-serif;
        }
        .search-box:focus-within {
            border-color: var(--primary);
            box-shadow: 0 0 0 2px rgba(74, 111, 165, 0.2);
        }
        .category-filters {
            display: flex;
            flex-wrap: wrap;
            gap: 12px;
        }
        .filter-chip {
            background: var(--bg-body);
            border: 1px solid var(--border);
            padding: 8px 20px;
            border-radius: 60px;
            font-size: 13px;
            font-weight: 500;
            cursor: pointer;
            transition: all 0.2s;
            color: var(--text-mid);
        }
        .filter-chip.active {
            background: var(--primary);
            border-color: var(--primary);
            color: white;
        }
        .filter-chip:hover:not(.active) {
            background: var(--primary-light);
            border-color: var(--primary);
            color: var(--primary-dark);
        }

        /* FAQ列表 — 手风琴卡片 */
        .faq-list {
            display: flex;
            flex-direction: column;
            gap: 16px;
            margin-bottom: 48px;
        }
        .faq-item {
            background: var(--bg-card);
            border-radius: var(--radius-md);
            border: 1px solid var(--border);
            transition: all 0.2s;
            overflow: hidden;
            box-shadow: var(--shadow-sm);
        }
        .faq-item:hover {
            border-color: var(--primary-light);
            box-shadow: var(--shadow-md);
        }
        .faq-question {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 28px;
            cursor: pointer;
            font-weight: 700;
            font-size: 17px;
            color: var(--text-dark);
            background: var(--bg-soft);
            transition: background 0.2s;
        }
        .faq-question:hover {
            background: var(--primary-light);
        }
        .faq-question .q-text {
            display: flex;
            align-items: center;
            gap: 14px;
        }
        .faq-question .q-icon {
            color: var(--primary);
            font-size: 20px;
            font-weight: 600;
        }
        .faq-question .toggle-icon {
            color: var(--primary);
            font-size: 20px;
            transition: transform 0.3s ease;
        }
        .faq-answer {
            padding: 0 28px;
            max-height: 0;
            overflow: hidden;
            transition: max-height 0.35s ease, padding 0.2s ease;
            background: white;
            border-top: 1px solid transparent;
            color: var(--text-mid);
            line-height: 1.6;
        }
        .faq-answer.show {
            max-height: 500px;   /* 足够容纳内容 */
            padding: 20px 28px 24px 28px;
            border-top-color: var(--border);
        }
        .faq-answer p {
            margin-bottom: 8px;
            font-size: 15px;
        }
        .faq-answer a {
            color: var(--primary);
            text-decoration: none;
        }
        .faq-answer a:hover {
            text-decoration: underline;
        }

        /* 无结果状态 */
        .empty-faq {
            text-align: center;
            padding: 60px 20px;
            background: var(--bg-card);
            border-radius: var(--radius-lg);
            border: 1px solid var(--border);
            color: var(--text-mid);
        }
        .empty-faq i {
            font-size: 48px;
            margin-bottom: 16px;
            opacity: 0.5;
        }

        /* 客服帮助卡片 */
        .contact-card {
            background: linear-gradient(135deg, var(--primary-light) 0%, #ffffff 100%);
            border-radius: var(--radius-lg);
            padding: 32px 36px;
            margin-top: 32px;
            text-align: center;
            border: 1px solid var(--border);
        }
        .contact-card h3 {
            font-size: 24px;
            font-weight: 700;
            color: var(--primary-dark);
            margin-bottom: 12px;
        }
        .contact-card p {
            color: var(--text-mid);
            max-width: 500px;
            margin: 0 auto 20px auto;
        }
        .contact-buttons {
            display: flex;
            justify-content: center;
            gap: 20px;
            flex-wrap: wrap;
        }
        .contact-btn {
            background: var(--primary);
            color: white;
            padding: 10px 28px;
            border-radius: 60px;
            text-decoration: none;
            font-weight: 600;
            display: inline-flex;
            align-items: center;
            gap: 8px;
            transition: 0.2s;
        }
        .contact-btn.outline {
            background: transparent;
            border: 1px solid var(--primary);
            color: var(--primary-dark);
        }
        .contact-btn:hover {
            transform: translateY(-2px);
            background: var(--primary-dark);
        }
        .contact-btn.outline:hover {
            background: var(--primary-light);
        }

        /* 悬浮购物车 */
        .floating-cart {
            position: fixed;
            bottom: 28px;
            right: 28px;
            background: var(--primary);
            width: 56px;
            height: 56px;
            border-radius: 56px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 24px;
            box-shadow: 0 8px 20px rgba(74, 111, 165, 0.4);
            cursor: pointer;
            z-index: 99;
            transition: 0.2s;
        }
        .cart-badge {
            position: absolute;
            top: -5px;
            right: -5px;
            background: var(--accent);
            width: 22px;
            height: 22px;
            border-radius: 22px;
            font-size: 11px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        /* 页脚 */
        .footer {
            background: #1e2a3e;
            color: #a0b3d9;
            padding: 48px 28px 28px;
            margin-top: 60px;
        }
        .footer-inner {
            max-width: 1600px;
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            gap: 32px;
        }
        .footer-col h4 {
            color: #f0f3f8;
            margin-bottom: 16px;
            font-size: 16px;
        }
        .footer-col ul {
            list-style: none;
        }
        .footer-col li {
            margin-bottom: 8px;
        }
        .footer-col a {
            color: #a0b3d9;
            text-decoration: none;
            font-size: 13px;
        }
        .footer-col a:hover {
            color: white;
        }
        .footer-bottom {
            text-align: center;
            margin-top: 40px;
            padding-top: 20px;
            border-top: 1px solid #2d3b4f;
            font-size: 12px;
        }

        @media (max-width: 680px) {
            .faq-question {
                padding: 16px 20px;
                font-size: 15px;
            }
            .faq-answer.show {
                padding: 16px 20px 20px;
            }
            .page-header h1 {
                font-size: 28px;
            }
            .faq-toolbar {
                flex-direction: column;
                align-items: stretch;
            }
        }