/* ===== 基础重置 ===== */
        html {
            font-size: calc(16px + 2 * (100vw - 375px) / 375);
        }
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
            -webkit-tap-highlight-color: transparent;
        }

        /* ===== 页面背景 ===== */
        body {
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Helvetica Neue", "Microsoft YaHei", sans-serif;
            background: linear-gradient(180deg, #eaf3ff 0%, #f7faff 100%);
            min-height: 100vh;
            padding-top: 0;
            padding-bottom: calc(4.2rem + env(safe-area-inset-bottom));
            overflow-x: hidden;
            font-size: 1rem;
            position: relative;
            -webkit-font-smoothing: antialiased;
            -moz-osx-font-smoothing: grayscale;
            text-rendering: optimizeLegibility;
        }

        /* ===== 顶部导航 — 固定 ===== */
        .header {
            position: fixed;
            top: 0;
            left: 0;
            right: 0;
            z-index: 999;
            display: flex;
            align-items: center;
            justify-content: space-between;
            padding: 0.9rem 1.2rem;
            background: rgba(255, 255, 255, 0.55);
            backdrop-filter: blur(12px) saturate(160%);
            -webkit-backdrop-filter: blur(12px) saturate(160%);
            box-shadow: 0 1px 6px rgba(0, 0, 0, 0.06);
            border-bottom: 1px solid rgba(255, 255, 255, 0.4);
            transition: background 0.3s ease, box-shadow 0.35s ease, backdrop-filter 0.35s ease, border-color 0.3s ease;
            height: 4.2rem;
        }
        .header.scrolled {
            background: rgba(255, 255, 255, 0.92);
            backdrop-filter: saturate(180%) blur(16px) brightness(1.02);
            -webkit-backdrop-filter: saturate(180%) blur(16px) brightness(1.02);
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
            border-bottom: 1px solid rgba(255, 255, 255, 0.8);
        }

        /* ===== 菜单按钮（汉堡包 -> 叉） — 移动端 ===== */
        .menu-btn {
            width: 1.7rem;
            height: 1.7rem;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            gap: 0.3rem;
            cursor: pointer;
            flex-shrink: 0;
            position: relative;
            transition: transform 0.3s ease;
        }
        .menu-btn span {
            display: block;
            width: 1.5rem;
            height: 0.13rem;
            background: #333;
            border-radius: 2px;
            transition: all 0.35s cubic-bezier(0.68, -0.55, 0.27, 1.55);
            transform-origin: center;
            position: absolute;
            left: 50%;
            transform: translateX(-50%);
        }
        .menu-btn span:nth-child(1) {
            top: 0.2rem;
        }
        .menu-btn span:nth-child(2) {
            top: 0.7rem;
        }
        .menu-btn span:nth-child(3) {
            top: 1.2rem;
        }

        .menu-btn.is-active span:nth-child(1) {
            top: 0.7rem;
            transform: translateX(-50%) rotate(45deg);
            background: #333;
        }
        .menu-btn.is-active span:nth-child(2) {
            opacity: 0;
            transform: translateX(-50%) scaleX(0);
        }
        .menu-btn.is-active span:nth-child(3) {
            top: 0.7rem;
            transform: translateX(-50%) rotate(-45deg);
            background: #333;
        }

        /* ===== PC端桌面导航 ===== */
        .desktop-nav {
            display: none;
            align-items: center;
            gap: 0.2rem;
            flex: 1;
            margin-left: 1.5rem;
        }

        .desktop-nav .nav-item {
            position: relative;
            padding: 0.3rem 0.8rem;
            font-size: 0.92rem;
            font-weight: 500;
            color: #1d1d1f;
            cursor: pointer;
            border-radius: 4px;
            transition: background 0.2s ease, color 0.2s ease;
            white-space: nowrap;
            user-select: none;
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Helvetica Neue", "Microsoft YaHei", sans-serif;
            -webkit-font-smoothing: antialiased;
        }

        .desktop-nav .nav-item:hover {
            background: rgba(26, 76, 255, 0.06);
            color: #1a4cff;
        }

        .desktop-nav .nav-item .nav-label {
            display: flex;
            align-items: center;
            gap: 0.2rem;
        }

        .desktop-nav .nav-item .nav-label::after {
            content: '▾';
            font-size: 0.55rem;
            opacity: 0.5;
            margin-left: 0.2rem;
            transition: transform 0.2s ease;
        }

        .desktop-nav .nav-item:hover .nav-label::after {
            transform: rotate(180deg);
        }

        /* 最新活动 — 金色 */
        .desktop-nav .nav-item[data-target="activity"] .nav-label {
            color: #d4a017;
            font-weight: 600;
        }
        .desktop-nav .nav-item[data-target="activity"]:hover .nav-label {
            color: #b8860b;
        }

        /* ===== PC端下拉菜单 ===== */
        .desktop-nav .dropdown {
            position: absolute;
            top: calc(100% + 0.4rem);
            left: 0;
            min-width: 210px;
            background: #ffffff;
            border-radius: 6px;
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.10);
            border: 1px solid rgba(0, 0, 0, 0.04);
            padding: 0.4rem 0;
            opacity: 0;
            visibility: hidden;
            transform: translateY(-4px) scale(0.98);
            transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s ease;
            pointer-events: none;
            z-index: 1000;
        }

        .desktop-nav .nav-item:hover .dropdown,
        .desktop-nav .nav-item.dropdown-open .dropdown {
            opacity: 1;
            visibility: visible;
            transform: translateY(0) scale(1);
            pointer-events: auto;
        }

        .desktop-nav .dropdown .drop-item {
            padding: 0.55rem 1.2rem;
            font-size: 0.88rem;
            color: #1d1d1f;
            cursor: pointer;
            transition: background 0.15s ease, color 0.15s ease;
            display: flex;
            align-items: center;
            justify-content: space-between;
            border-left: 3px solid transparent;
            font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Helvetica Neue", "Microsoft YaHei", sans-serif;
            -webkit-font-smoothing: antialiased;
        }

        .desktop-nav .dropdown .drop-item:hover {
            background: #f5f7ff;
            color: #1a4cff;
            border-left-color: #1a4cff;
        }

        .desktop-nav .dropdown .drop-item .drop-arrow {
            color: #1a4cff;
            font-size: 0.9rem;
            opacity: 0.4;
            transition: opacity 0.2s ease;
        }

        .desktop-nav .dropdown .drop-item:hover .drop-arrow {
            opacity: 1;
        }

        /* ===== Logo ===== */
        .logo {
            display: flex;
            align-items: center;
            cursor: default;
            user-select: none;
            flex-shrink: 0;
        }
        .logo img {
            height: 2rem;
            width: auto;
            display: block;
            max-height: 2rem;
            object-fit: contain;
        }

        /* ===== 用户头像 ===== */
        .user-avatar {
            width: 2rem;
            height: 2rem;
            border-radius: 50%;
            overflow: hidden;
            flex-shrink: 0;
            cursor: pointer;
            transition: transform 0.2s ease;
            background: transparent;
        }
        .user-avatar:active {
            transform: scale(0.92);
        }
        .user-avatar img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            display: block;
        }

        /* ============================================================
                   侧边栏 — 移动端
                   ============================================================ */
        .sidebar-overlay {
            position: fixed;
            top: 4.2rem;
            left: 0;
            width: 100vw;
            height: calc(100vh - 4.2rem);
            z-index: 998;
            background: rgba(0, 0, 0, 0.30);
            opacity: 0;
            visibility: hidden;
            transition: opacity 0.4s ease, visibility 0.4s ease;
            pointer-events: none;
        }
        .sidebar-overlay.open {
            opacity: 1;
            visibility: visible;
            pointer-events: auto;
        }

        .sidebar {
            position: fixed;
            top: 4.2rem;
            left: 0;
            width: 100vw;
            height: calc(100vh - 4.2rem);
            z-index: 999;
            display: flex;
            transform: translateX(-100%);
            transition: transform 0.45s cubic-bezier(0.22, 1, 0.36, 1);
            background: #ffffff;
            overflow: hidden;
            pointer-events: none;
            border-top: 1px solid rgba(0, 0, 0, 0.04);
        }
        .sidebar.open {
            transform: translateX(0);
            pointer-events: auto;
        }

        .sidebar-left {
            width: 33.333%;
            height: 100%;
            background: #f5f7ff;
            padding: 1.8rem 1.2rem 2rem;
            display: flex;
            flex-direction: column;
            flex-shrink: 0;
            overflow-y: auto;
            border-right: 1px solid rgba(26, 76, 255, 0.06);
        }

        .sidebar-left .menu-label {
            font-size: 0.7rem;
            letter-spacing: 0.1em;
            color: rgba(26, 76, 255, 0.35);
            text-transform: uppercase;
            margin-bottom: 1.2rem;
            font-weight: 600;
        }

        .sidebar-menu {
            display: flex;
            flex-direction: column;
            gap: 0.25rem;
            flex: 1;
        }

        .sidebar-menu .menu-item {
            padding: 0.85rem 1rem;
            font-size: 1.05rem;
            font-weight: 500;
            color: #1d1d1f;
            cursor: pointer;
            border-radius: 4px;
            transition: all 0.25s ease;
            background: transparent;
            border: none;
            text-align: left;
            width: 100%;
            font-family: inherit;
        }

        .sidebar-menu .menu-item:active {
            transform: scale(0.97);
        }

        .sidebar-menu .menu-item.active {
            background: #ffffff;
            color: #1a4cff;
            box-shadow: 0 2px 12px rgba(26, 76, 255, 0.10);
            border: 1px solid rgba(26, 76, 255, 0.08);
        }

        .sidebar-menu .menu-item:not(.active):hover {
            background: rgba(26, 76, 255, 0.06);
            color: #1a4cff;
        }

        .sidebar-right {
            width: 66.667%;
            height: 100%;
            background: #ffffff;
            padding: 1.8rem 2rem 2rem 2rem;
            overflow-y: auto;
            flex-shrink: 0;
        }

        .sidebar-right .content-title {
            font-size: 1.6rem;
            font-weight: 700;
            color: #1d1d1f;
            margin-bottom: 1.5rem;
            padding-bottom: 0.6rem;
            border-bottom: 2px solid #f0f3f8;
        }

        .sidebar-right .content-list {
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
        }

        .sidebar-right .content-item {
            padding: 1rem 1.2rem;
            background: #f8faff;
            border-radius: 4px;
            border-left: 3px solid #1a4cff;
            cursor: pointer;
            transition: all 0.25s ease;
            display: flex;
            align-items: center;
            justify-content: space-between;
        }

        .sidebar-right .content-item:hover {
            background: #eef4ff;
            transform: translateX(4px);
        }

        .sidebar-right .content-item:active {
            transform: scale(0.98);
        }

        .sidebar-right .content-item .item-title {
            font-size: 1.05rem;
            font-weight: 600;
            color: #1d1d1f;
        }

        .sidebar-right .content-item .item-desc {
            font-size: 0.9rem;
            color: #667085;
            margin-top: 0.2rem;
        }

        .sidebar-right .content-item .item-arrow {
            color: #1a4cff;
            font-size: 1.2rem;
            font-weight: 300;
            flex-shrink: 0;
            margin-left: 1rem;
        }

        .sidebar-right .content-item .item-content {
            display: flex;
            flex-direction: column;
            flex: 1;
        }

        /* ===== 滚动条美化 ===== */
        .sidebar-left::-webkit-scrollbar,
        .sidebar-right::-webkit-scrollbar {
            width: 3px;
        }
        .sidebar-left::-webkit-scrollbar-track {
            background: transparent;
        }
        .sidebar-left::-webkit-scrollbar-thumb {
            background: rgba(26, 76, 255, 0.15);
            border-radius: 2px;
        }
        .sidebar-right::-webkit-scrollbar-track {
            background: #f0f3f8;
        }
        .sidebar-right::-webkit-scrollbar-thumb {
            background: #d1d9e6;
            border-radius: 2px;
        }

        /* ============================================================
                   BANNER 轮播
                   ============================================================ */
        .banner {
            position: relative;
            width: 100%;
            min-height: 54vh;
            overflow: hidden;
            padding: 0;
            margin: 0;
            background: #0a0e1a;
        }

        .carousel-wrapper {
            width: 100%;
            min-height: 54vh;
            touch-action: pan-y;
            background: #0a0e1a;
            position: relative;
            overflow: hidden;
        }

        .carousel-inner {
            width: 100%;
            min-height: 54vh;
            position: relative;
            display: flex;
            transition: transform 0.5s cubic-bezier(0.25, 0.46, 0.45, 0.94);
            will-change: transform;
            background: #0a0e1a;
        }

        .page-item {
            position: relative;
            top: 0;
            left: 0;
            width: 100%;
            min-height: 54vh;
            flex-shrink: 0;
            display: flex;
            flex-direction: column;
            justify-content: center;
            padding: 4.6rem 1.75rem 3.5rem;
            overflow: hidden;
            background: #0a0e1a;
        }

        .page-item video {
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            object-fit: cover;
            object-position: center center;
            display: block;
            border-radius: 0;
            background: #0a0e1a;
            z-index: 0;
            pointer-events: none;
        }
        .page-item .overlay {
            display: none;
        }

        .page-content {
            position: relative;
            z-index: 2;
            display: flex;
            flex-direction: column;
            align-items: flex-start;
            justify-content: center;
            width: 100%;
            max-width: 600px;
            color: #fff;
            text-shadow: 0 2px 16px rgba(0, 0, 0, 0.35);
        }

        .page-content .banner-tag {
            display: inline-flex;
            align-items: center;
            gap: 0.8rem;
            margin-bottom: 1rem;
        }
        .page-content .tag-text {
            font-size: 1.15rem;
            color: #fff;
            font-weight: 500;
            text-shadow: 0 1px 12px rgba(0, 0, 0, 0.4);
        }
        .page-content .tag-badge {
            background: #f03838;
            color: #fff;
            padding: 0.3rem 0.8rem;
            border-radius: 4px;
            font-size: 0.9rem;
            font-weight: 500;
            text-shadow: none;
        }
        .page-content .tag-badge.orange {
            background: #f59e0b;
        }

        .page-content .banner-title {
            font-size: 2.2rem;
            font-weight: 700;
            color: #fff;
            line-height: 1.25;
            margin-bottom: 1rem;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.4);
        }
        .page-content .banner-desc {
            font-size: 1rem;
            color: rgba(255, 255, 255, 0.92);
            line-height: 1.7;
            margin-bottom: 1.4rem;
            text-shadow: 0 1px 12px rgba(0, 0, 0, 0.4);
        }
        .page-content .banner-btn {
            background: #3b82f6;
            color: #fff;
            border: none;
            padding: 0.5rem 1.5rem;
            font-size: 0.95rem;
            border-radius: 0;
            font-weight: 500;
            cursor: pointer;
            position: relative;
            z-index: 2;
            transition: background 0.2s ease, transform 0.15s ease;
            box-shadow: 0 4px 20px rgba(59, 130, 246, 0.35);
            text-shadow: none;
        }
        .page-content .banner-btn:active {
            transform: scale(0.96);
        }

        /* ===== 分页器 ===== */
        .banner-dots {
            position: absolute;
            bottom: 2.4rem;
            left: 0;
            right: 0;
            z-index: 30;
            display: flex;
            justify-content: flex-start;
            gap: 0.6rem;
            padding: 0 1.75rem;
            pointer-events: none;
        }

        .banner-dots .dot {
            width: 2rem;
            height: 0.12rem;
            background: rgba(255, 255, 255, 0.35);
            border-radius: 0;
            cursor: pointer;
            pointer-events: auto;
            transition: background 0.3s ease, transform 0.25s ease;
            flex-shrink: 0;
        }
        .banner-dots .dot.active {
            background: #3b82f6;
            transform: scaleY(1.8);
        }

        /* ============================================================
                   四个卡片 — 图标统一替换为图片
                   ============================================================ */
        .feature-grid {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 0.85rem;
            padding: 0 1.25rem;
            margin-top: -1.6rem;
            margin-bottom: 2.8rem;
            position: relative;
            z-index: 5;
        }

        .feature-card {
            position: relative;
            overflow: hidden;
            background: #ffffff;
            border: 3px solid #ffffff;
            border-radius: 0;
            padding: 0.9rem 1rem;
            display: flex;
            align-items: center;
            gap: 0.75rem;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.06);
            cursor: pointer;
            transition: transform 0.15s ease, box-shadow 0.2s ease;
        }
        .feature-card:active {
            transform: scale(0.97);
        }
        .feature-card::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            width: 100%;
            height: 50%;
            background: linear-gradient(180deg, rgba(0, 0, 0, 0.04), transparent);
            pointer-events: none;
        }

        /* 卡片图标 — 图片样式 */
        .feature-icon {
            width: 1.75rem;
            height: 1.75rem;
            flex-shrink: 0;
            position: relative;
            z-index: 1;
            object-fit: contain;
            display: block;
        }

        .feature-text {
            font-size: 1.05rem;
            color: #1f2937;
            font-weight: 500;
            position: relative;
            z-index: 1;
        }

        /* ===== 信息区 ===== */
        .info-section {
            padding: 0 1.5rem 0.5rem;
            text-align: center;
        }
        .section-title {
            font-size: 1.8rem;
            font-weight: 700;
            color: #1d1d1f;
            margin-bottom: 0.8rem;
        }
        .section-desc {
            font-size: 1rem;
            color: #667085;
            line-height: 1.7;
        }
        .section-link {
            color: #3b82f6;
            font-size: 1rem;
            margin-left: 0.25rem;
            cursor: pointer;
            font-weight: 500;
        }

        /* ===== 解决方案板块 ===== */
        .solution-section {
            padding: 2.2rem 1.5rem 2.8rem;
            background: transparent;
        }

        .solution-title {
            font-size: 1.8rem;
            font-weight: 700;
            color: #1d1d1f;
            text-align: center;
            margin-bottom: 1.8rem;
        }

        .solution-grid {
            display: grid;
            grid-template-columns: 1fr 1fr 1fr;
            gap: 1.2rem;
            max-width: 100%;
        }

        .solution-card {
            background: #ffffff;
            padding: 1.5rem 1rem 1.2rem;
            text-align: center;
            border: 1px solid rgba(0, 0, 0, 0.04);
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
            transition: transform 0.25s ease, box-shadow 0.3s ease;
            cursor: default;
        }

        .solution-card:hover {
            transform: translateY(-4px);
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.07);
        }

        .solution-card .icon-wrap {
            width: 3.2rem;
            height: 3.2rem;
            margin: 0 auto 0.8rem;
            display: flex;
            align-items: center;
            justify-content: center;
            background: linear-gradient(135deg, #e8f0fe 0%, #d4e2fc 100%);
            border-radius: 0;
            color: #3b82f6;
        }

        .solution-card .icon-wrap svg {
            width: 1.8rem;
            height: 1.8rem;
            stroke: #3b82f6;
            fill: none;
        }

        .solution-card h3 {
            font-size: 1.15rem;
            font-weight: 600;
            color: #1d1d1f;
            margin-bottom: 0.5rem;
        }

        .solution-card p {
            font-size: 0.95rem;
            color: #667085;
            line-height: 1.6;
        }

        /* ============================================================
                   服务描述区域 — 图标在文字前面（水平排列）
                   ============================================================ */
        .service-description {
            display: none;
            padding: 2.5rem 1.5rem 1.5rem;
            background: transparent;
            max-width: 1200px;
            margin: 0 auto;
        }

        .service-description .service-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 1.5rem;
        }

        .service-description .service-item {
            display: flex;
            flex-direction: row;
            /* 水平排列，图标在文字前面 */
            align-items: center;
            gap: 0.8rem;
            padding: 0.5rem 0.8rem;
            justify-content: flex-start;
        }

        .service-description .service-item .service-icon {
            width: 2rem;
            height: 2rem;
            flex-shrink: 0;
            color: #3b82f6;
        }

        .service-description .service-item .service-icon svg {
            width: 100%;
            height: 100%;
            stroke: #3b82f6;
            fill: none;
        }

        .service-description .service-item .service-label {
            font-size: 1rem;
            color: #1d1d1f;
            font-weight: 500;
            letter-spacing: 0.02em;
            white-space: nowrap;
        }

        /* ===== 灰色分割线 ===== */
        .divider-gray {
            display: none;
            max-width: 1200px;
            margin: 0 auto;
            padding: 0 1.5rem;
        }
        .divider-gray hr {
            border: none;
            border-top: 1px solid #e5e7eb;
            margin: 0;
        }

        /* ===== 底部版权 + 服务指南 ===== */
        .footer-copyright {
            background: #0b0b1a;
            padding: 2rem 1.5rem 1.5rem;
            border-top: 1px solid rgba(59, 130, 246, 0.08);
        }

        .footer-copyright .footer-inner {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 0.8rem;
        }

        .footer-copyright .footer-text {
            font-size: 0.9rem;
            color: rgba(255, 255, 255, 0.55);
            text-align: center;
            line-height: 1.7;
        }

        .footer-copyright .footer-text .brand {
            color: rgba(255, 255, 255, 0.85);
            font-weight: 500;
        }

        .footer-copyright .footer-links {
            display: flex;
            flex-wrap: wrap;
            justify-content: center;
            gap: 0.6rem 1.2rem;
        }

        .footer-copyright .footer-links a {
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.4);
            text-decoration: none;
            transition: color 0.2s ease;
            cursor: pointer;
            position: relative;
        }

        .footer-copyright .footer-links a:hover {
            color: rgba(255, 255, 255, 0.7);
        }

        .footer-copyright .footer-links a:not(:last-child)::after {
            content: '|';
            margin-left: 1.2rem;
            color: rgba(255, 255, 255, 0.12);
            pointer-events: none;
        }
        .footer-copyright .footer-links a:last-child::after {
            display: none;
        }

        /* ===== 底部 — 服务指南区域（自适应移动端） ===== */
        .footer-guide {
            background: #0b0b1a;
            padding: 0 1.5rem 1.8rem;
            border-top: 1px solid rgba(255, 255, 255, 0.04);
        }

        .footer-guide .guide-inner {
            max-width: 1200px;
            margin: 0 auto;
            display: flex;
            flex-wrap: wrap;
            justify-content: flex-start;
            gap: 2rem 3rem;
        }

        .footer-guide .guide-col {
            display: flex;
            flex-direction: column;
            gap: 0.5rem;
            min-width: 120px;
        }

        .footer-guide .guide-col .guide-title {
            font-size: 0.85rem;
            font-weight: 600;
            color: rgba(255, 255, 255, 0.7);
            letter-spacing: 0.04em;
            margin-bottom: 0.2rem;
        }

        .footer-guide .guide-col a {
            font-size: 0.8rem;
            color: rgba(255, 255, 255, 0.35);
            text-decoration: none;
            transition: color 0.2s ease;
            cursor: pointer;
            line-height: 1.8;
        }

        .footer-guide .guide-col a:hover {
            color: rgba(255, 255, 255, 0.65);
        }

        /* ===== 回到顶部按钮 ===== */
        .back-to-top {
            position: fixed;
            bottom: 5.5rem;
            right: 1.2rem;
            z-index: 900;
            width: 2.8rem;
            height: 2.8rem;
            background: #ffffff;
            border: 1px solid rgba(0, 0, 0, 0.06);
            border-radius: 4px;
            box-shadow: 0 4px 16px rgba(0, 0, 0, 0.08);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            transition: all 0.3s ease;
            opacity: 0;
            visibility: hidden;
            transform: translateY(12px);
        }

        .back-to-top.visible {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        .back-to-top:hover {
            background: #f5f7ff;
            box-shadow: 0 6px 24px rgba(0, 0, 0, 0.12);
            transform: translateY(-2px);
        }

        .back-to-top:active {
            transform: scale(0.92);
        }

        .back-to-top svg {
            width: 1.4rem;
            height: 1.4rem;
            stroke: #1d1d1f;
            stroke-width: 2;
            fill: none;
        }

        /* ===== 底部 Tab — 移动端 ===== */
        .tab-bar {
            position: fixed;
            bottom: 0;
            left: 0;
            right: 0;
            background: #ffffff;
            display: flex;
            justify-content: space-around;
            align-items: center;
            padding: 0.6rem 0 calc(0.7rem + env(safe-area-inset-bottom));
            border-top: 1px solid #f0f3f8;
            z-index: 100;
            min-height: 3.8rem;
        }
        .tab-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 0.2rem;
            color: #2b2b2b;
            font-size: 0.85rem;
            cursor: pointer;
            transition: color 0.2s;
            padding: 0.1rem 0.4rem;
        }
        .tab-item.active {
            color: #000000;
        }
        .tab-icon {
            width: 1.5rem;
            height: 1.5rem;
            stroke: currentColor;
            transition: stroke 0.2s;
        }
        .tab-item.active .tab-icon {
            stroke: #000000;
        }

        /* ============================================================
                   PC端响应式 (>=1024px)
                   ============================================================ */
        @media (min-width: 1024px) {

            /* 隐藏移动端菜单按钮和侧边栏 */
            .menu-btn {
                display: none !important;
            }
            .sidebar-overlay,
            .sidebar {
                display: none !important;
            }

            /* 显示桌面导航 */
            .desktop-nav {
                display: flex !important;
            }

            /* 导航栏高度降低 */
            .header {
                height: 3.2rem;
                padding: 0.4rem 2rem;
            }

            .logo img {
                height: 1.7rem;
                max-height: 1.7rem;
            }

            .user-avatar {
                width: 1.8rem;
                height: 1.8rem;
            }

            body {
                padding-top: 0;
                padding-bottom: 0;
            }

            /* ===== PC端轮播高度拉高 ===== */
            .banner,
            .carousel-wrapper,
            .carousel-inner {
                min-height: 62vh;
            }
            .page-item {
                min-height: 62vh;
            }

            .page-item {
                padding: 4.6rem 2rem 3.5rem;
            }

            /* ===== 轮播内容居中，文字向白色分隔线靠拢 ===== */
            .page-content {
                max-width: 720px;
                margin: 0 auto;
                padding-left: 200px;
                align-items: flex-start;
                width: 100%;
            }

            .banner .page-content {
                padding-left: 200px;
            }

            /* ===== PC端左侧导航按钮 — 向右靠拢 ===== */
            .banner-nav {
                position: absolute;
                left: 12rem;
                top: 50%;
                transform: translateY(-50%);
                z-index: 50;
                display: flex;
                flex-direction: column;
                gap: 0.8rem;
                align-items: flex-start;
                pointer-events: none;
            }

            .banner-nav .nav-btn {
                background: transparent;
                border: none;
                color: #1d1d1f;
                font-size: 0.95rem;
                font-weight: 500;
                cursor: pointer;
                padding: 0.4rem 1rem 0.4rem 0.4rem;
                text-align: left;
                position: relative;
                transition: all 0.35s ease;
                pointer-events: auto;
                font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Helvetica Neue", "Microsoft YaHei", sans-serif;
                -webkit-font-smoothing: antialiased;
                letter-spacing: 0.02em;
                border-right: 2px solid transparent;
                white-space: nowrap;
                text-shadow: 0 1px 4px rgba(255, 255, 255, 0.15);
            }

            .banner-nav .nav-btn .btn-text {
                display: block;
                transition: color 0.3s ease, opacity 0.3s ease;
                opacity: 0.5;
                color: #1d1d1f;
            }

            .banner-nav .nav-btn:hover .btn-text {
                opacity: 0.8;
            }

            .banner-nav .nav-btn.active .btn-text {
                opacity: 1;
                color: #1d1d1f;
                font-weight: 600;
            }

            .banner-nav .nav-btn.active {
                border-right-color: #3b82f6;
            }

            .banner-nav .nav-btn::after {
                content: '';
                position: absolute;
                right: -2px;
                top: 20%;
                bottom: 20%;
                width: 2px;
                background: #3b82f6;
                opacity: 0;
                transition: opacity 0.35s ease, top 0.35s ease, bottom 0.35s ease;
                border-radius: 1px;
            }

            .banner-nav .nav-btn.active::after {
                opacity: 1;
                top: 10%;
                bottom: 10%;
            }

            /* ===== 白色竖线分隔 ===== */
            .banner-nav::before {
                content: '';
                position: absolute;
                right: -1.2rem;
                top: -30%;
                bottom: -30%;
                width: 1px;
                background: rgba(255, 255, 255, 0.25);
                pointer-events: none;
                opacity: 0.8;
            }

            /* 调整分页器位置 */
            .banner-dots {
                bottom: 2.8rem;
                padding: 0 2rem;
                z-index: 30;
                left: 8rem;
            }

            .banner-dots .dot {
                width: 2.4rem;
                height: 0.14rem;
            }

            /* 选购按钮PC端确保不被遮挡 */
            .page-content .banner-btn {
                padding: 0.6rem 2rem;
                font-size: 1rem;
                z-index: 5;
                position: relative;
            }

            /* ===== 四个卡片 — 半透明，一行4个 ===== */
            .feature-grid {
                grid-template-columns: 1fr 1fr 1fr 1fr;
                gap: 1.2rem;
                padding: 0 2rem;
                max-width: 1200px;
                margin-left: auto;
                margin-right: auto;
                margin-top: -2.2rem;
                position: relative;
                z-index: 5;
            }

            .feature-card {
                padding: 1rem 1.2rem;
                background: rgba(255, 255, 255, 0.72);
                backdrop-filter: blur(4px);
                -webkit-backdrop-filter: blur(4px);
                border: 2px solid rgba(255, 255, 255, 0.6);
                box-shadow: 0 4px 20px rgba(0, 0, 0, 0.04);
                transition: transform 0.25s ease, box-shadow 0.3s ease, background 0.3s ease;
            }

            .feature-card:hover {
                background: rgba(255, 255, 255, 0.92);
                transform: translateY(-2px);
                box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
            }

            .feature-card::before {
                background: linear-gradient(180deg, rgba(255, 255, 255, 0.2), transparent);
            }

            .feature-text {
                font-size: 1rem;
                color: #1f2937;
            }

            /* ===== 服务描述 — PC端显示 ===== */
            .service-description {
                display: block !important;
            }

            /* ===== 灰色分割线 — PC端显示 ===== */
            .divider-gray {
                display: block !important;
            }

            /* ===== 回到顶部按钮 — PC端位置调整 ===== */
            .back-to-top {
                bottom: 2.5rem;
                right: 2.5rem;
                width: 3rem;
                height: 3rem;
            }

            /* ===== 底部版权区域 — PC端布局 ===== */
            .footer-copyright .footer-inner {
                flex-direction: row;
                justify-content: space-between;
                gap: 1.5rem;
            }

            .footer-copyright .footer-text {
                text-align: left;
            }

            .footer-copyright .footer-links {
                justify-content: flex-end;
            }

            .footer-guide .guide-inner {
                justify-content: flex-start;
                gap: 3rem 5rem;
            }

            .info-section {
                max-width: 800px;
                margin: 0 auto;
                padding: 0 2rem 0.5rem;
            }

            .solution-section {
                max-width: 1200px;
                margin: 0 auto;
                padding: 2.2rem 2rem 2.8rem;
            }

            .solution-grid {
                grid-template-columns: 1fr 1fr 1fr;
                gap: 1.5rem;
            }

            .footer-copyright {
                padding: 2rem 2rem 1.5rem;
            }
            .footer-copyright .footer-inner {
                max-width: 1200px;
            }

            .footer-guide {
                padding: 0 2rem 1.8rem;
            }
            .footer-guide .guide-inner {
                max-width: 1200px;
            }

            .tab-bar {
                display: none !important;
            }

            .desktop-nav .dropdown {
                min-width: 220px;
                border-radius: 8px;
                box-shadow: 0 16px 48px rgba(0, 0, 0, 0.12);
                padding: 0.4rem 0;
            }

            .desktop-nav .dropdown .drop-item {
                padding: 0.6rem 1.4rem;
                font-size: 0.9rem;
            }

            .desktop-nav {
                gap: 0.3rem;
                margin-left: 2rem;
            }

            .desktop-nav .nav-item {
                padding: 0.3rem 0.9rem;
                font-size: 0.92rem;
                letter-spacing: 0.01em;
            }

            .desktop-nav .nav-item[data-target="activity"] .nav-label {
                color: #d4a017 !important;
                font-weight: 600;
            }
            .desktop-nav .nav-item[data-target="activity"]:hover .nav-label {
                color: #b8860b !important;
            }
        }

        /* ============================================================
                   平板端 (768px - 1023px)
                   ============================================================ */
        @media (min-width: 768px) and (max-width: 1023px) {
            .sidebar-left {
                width: 40%;
                padding: 1.5rem 1rem 1.5rem;
            }
            .sidebar-right {
                width: 60%;
                padding: 1.5rem 1.2rem 1.5rem;
            }
            .sidebar-menu .menu-item {
                font-size: 0.95rem;
                padding: 0.7rem 0.8rem;
            }
            .sidebar-right .content-title {
                font-size: 1.3rem;
            }

            .feature-grid {
                grid-template-columns: 1fr 1fr;
                gap: 0.85rem;
                padding: 0 1.5rem;
            }

            .solution-grid {
                grid-template-columns: 1fr 1fr 1fr;
            }

            /* 平板端显示服务描述 */
            .service-description {
                display: block !important;
            }
            .service-description .service-grid {
                grid-template-columns: repeat(4, 1fr);
                gap: 1rem;
            }
            .divider-gray {
                display: block !important;
            }

            .back-to-top {
                bottom: 2rem;
                right: 1.5rem;
            }

            /* 平板端服务指南自适应 */
            .footer-guide .guide-inner {
                gap: 2rem 2.5rem;
            }
            .footer-guide .guide-col {
                min-width: 100px;
            }
        }

        /* ============================================================
                   移动端 (<=767px)
                   ============================================================ */
        @media (max-width: 767px) {
            .sidebar-left {
                width: 45%;
                padding: 1.2rem 0.8rem 1rem;
            }
            .sidebar-right {
                width: 55%;
                padding: 1.2rem 0.8rem 1rem;
            }
            .sidebar-menu .menu-item {
                font-size: 0.85rem;
                padding: 0.6rem 0.7rem;
            }
            .sidebar-right .content-title {
                font-size: 1.1rem;
                margin-bottom: 0.8rem;
            }
            .sidebar-right .content-item {
                padding: 0.7rem 0.8rem;
            }
            .sidebar-right .content-item .item-title {
                font-size: 0.9rem;
            }
            .sidebar-right .content-item .item-desc {
                font-size: 0.75rem;
            }

            .banner,
            .carousel-wrapper,
            .carousel-inner {
                min-height: 50vh;
            }
            .page-item {
                min-height: 50vh;
            }
            .page-content .banner-title {
                font-size: 1.8rem;
            }
            .page-content .tag-text {
                font-size: 1rem;
            }
            .banner-dots .dot {
                width: 1.6rem;
                height: 0.1rem;
            }
            .banner-dots {
                padding: 0 1.2rem;
                bottom: 2rem;
            }

            .solution-grid {
                grid-template-columns: 1fr;
                gap: 0.9rem;
            }
            .solution-title {
                font-size: 1.5rem;
            }
            .solution-card {
                padding: 1.2rem 0.8rem;
            }
            .solution-card .icon-wrap {
                width: 2.8rem;
                height: 2.8rem;
            }
            .solution-card .icon-wrap svg {
                width: 1.5rem;
                height: 1.5rem;
            }

            .footer-copyright {
                padding: 1.5rem 1rem 1rem;
            }
            .footer-copyright .footer-links {
                gap: 0.4rem 0.8rem;
            }
            .footer-copyright .footer-links a {
                font-size: 0.7rem;
            }
            .footer-copyright .footer-links a:not(:last-child)::after {
                margin-left: 0.8rem;
            }

            /* ===== 移动端服务指南自适应 — 2列网格 ===== */
            .footer-guide {
                padding: 0 1rem 1.5rem;
            }
            .footer-guide .guide-inner {
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 1.5rem 1.2rem;
                justify-content: flex-start;
            }
            .footer-guide .guide-col {
                min-width: auto;
                gap: 0.3rem;
            }
            .footer-guide .guide-col .guide-title {
                font-size: 0.8rem;
                color: rgba(255, 255, 255, 0.6);
            }
            .footer-guide .guide-col a {
                font-size: 0.75rem;
                color: rgba(255, 255, 255, 0.3);
                line-height: 1.6;
            }

            .tab-bar {
                min-height: 3.2rem;
                padding: 0.5rem 0 calc(0.6rem + env(safe-area-inset-bottom));
            }
            .tab-item {
                font-size: 0.75rem;
            }
            .tab-icon {
                width: 1.3rem;
                height: 1.3rem;
            }

            .header {
                height: 3.8rem;
                padding: 0.7rem 1rem;
            }
            .sidebar-overlay {
                top: 3.8rem;
                height: calc(100vh - 3.8rem);
            }
            .sidebar {
                top: 3.8rem;
                height: calc(100vh - 3.8rem);
            }

            /* 移动端隐藏PC导航 */
            .banner-nav {
                display: none !important;
            }

            /* 移动端隐藏服务描述和分割线 */
            .service-description {
                display: none !important;
            }
            .divider-gray {
                display: none !important;
            }

            .back-to-top {
                bottom: 5rem;
                right: 1rem;
                width: 2.5rem;
                height: 2.5rem;
            }
            .back-to-top svg {
                width: 1.2rem;
                height: 1.2rem;
            }
        }

        /* 小屏手机 */
        @media (max-width: 380px) {
            .header {
                height: 3.5rem;
                padding: 0.6rem 0.8rem;
            }
            .sidebar-overlay {
                top: 3.5rem;
                height: calc(100vh - 3.5rem);
            }
            .sidebar {
                top: 3.5rem;
                height: calc(100vh - 3.5rem);
            }

            /* 小屏手机服务指南 — 1列 */
            .footer-guide .guide-inner {
                grid-template-columns: 1fr 1fr;
                gap: 1rem 1rem;
            }
        }

        @media (max-width: 340px) {
            .footer-guide .guide-inner {
                grid-template-columns: 1fr;
                gap: 1rem;
            }
        }

        /* ============================================================
           合作伙伴 — 3行Logo轮播展示
           ============================================================ */
        .partner-section {
            padding: 2.5rem 1.5rem 3rem;
            background: #f5f7fa;
            text-align: center;
            overflow: hidden;
        }
        .partner-title {
            font-size: 1.6rem;
            font-weight: 700;
            color: #1d1d1f;
            margin-bottom: 0.6rem;
        }
        .partner-desc {
            font-size: 0.95rem;
            color: #667085;
            line-height: 1.7;
            max-width: 600px;
            margin: 0 auto 1.8rem;
            padding: 0 1rem;
        }
        .partner-rows {
            display: flex;
            flex-direction: column;
            gap: 0.8rem;
        }
        .partner-row-wrapper {
            width: 100%;
            overflow: hidden;
            position: relative;
        }
        .partner-row-wrapper::before,
        .partner-row-wrapper::after {
            content: '';
            position: absolute;
            top: 0;
            bottom: 0;
            width: 60px;
            z-index: 2;
            pointer-events: none;
        }
        .partner-row-wrapper::before {
            left: 0;
            background: linear-gradient(to right, #f5f7fa, transparent);
        }
        .partner-row-wrapper::after {
            right: 0;
            background: linear-gradient(to left, #f5f7fa, transparent);
        }
        .partner-row-track {
            display: flex;
            gap: 0.75rem;
            width: max-content;
        }
        .partner-logo {
            width: calc((100vw - 4rem) / 3);
            max-width: 160px;
            min-width: 100px;
            height: 70px;
            background: #ffffff;
            border-radius: 6px;
            display: flex;
            align-items: center;
            justify-content: center;
            padding: 0.6rem 0.8rem;
            box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
            flex-shrink: 0;
        }
        .partner-logo img {
            max-width: 100%;
            max-height: 100%;
            object-fit: contain;
            display: block;
        }

        /* PC端3行无限滚动 */
        @media (min-width: 1024px) {
            .partner-section {
                padding: 3rem 2rem 3.5rem;
            }
            .partner-title {
                font-size: 1.8rem;
            }
            .partner-desc {
                font-size: 1rem;
                margin-bottom: 2.2rem;
            }
            .partner-rows {
                gap: 1rem;
            }
            .partner-row-track {
                gap: 1rem;
            }
            .partner-row-track.row-1 {
                animation: partnerScroll1 25s linear infinite;
            }
            .partner-row-track.row-2 {
                animation: partnerScroll2 30s linear infinite;
            }
            .partner-row-track.row-3 {
                animation: partnerScroll3 35s linear infinite;
            }
            .partner-row-wrapper:hover .partner-row-track {
                animation-play-state: paused;
            }
            .partner-logo {
                width: 150px;
                height: 80px;
                padding: 0.8rem 1rem;
            }
        }

        @keyframes partnerScroll1 {
            0% { transform: translateX(0); }
            100% { transform: translateX(-50%); }
        }
        @keyframes partnerScroll2 {
            0% { transform: translateX(0); }
            100% { transform: translateX(-50%); }
        }
        @keyframes partnerScroll3 {
            0% { transform: translateX(0); }
            100% { transform: translateX(-50%); }
        }

        /* 平板端静态网格 */
        @media (min-width: 768px) and (max-width: 1023px) {
            .partner-rows {
                display: grid;
                grid-template-columns: repeat(3, 1fr);
                gap: 0.75rem;
                max-width: 900px;
                margin: 0 auto;
            }
            .partner-row-wrapper {
                overflow: visible;
            }
            .partner-row-wrapper::before,
            .partner-row-wrapper::after {
                display: none;
            }
            .partner-row-track {
                display: grid;
                grid-template-columns: 1fr 1fr;
                gap: 0.75rem;
                width: 100%;
            }
            .partner-logo {
                width: 100%;
                height: 70px;
            }
        }

        /* 移动端静态网格 */
        @media (max-width: 767px) {
            .partner-rows {
                display: grid;
                grid-template-columns: repeat(3, 1fr);
                gap: 0.6rem;
            }
            .partner-row-wrapper {
                overflow: visible;
            }
            .partner-row-wrapper::before,
            .partner-row-wrapper::after {
                display: none;
            }
            .partner-row-track {
                display: contents;
            }
            .partner-logo {
                width: 100%;
                height: 60px;
                padding: 0.5rem 0.6rem;
            }
            .partner-section {
                padding: 2rem 1rem 2.5rem;
            }
            .partner-title {
                font-size: 1.4rem;
            }
            .partner-desc {
                font-size: 0.85rem;
                margin-bottom: 1.2rem;
            }
        }

        /* ============================================================
           新底部版权区域 — 1:1还原图片样式
           ============================================================ */
        .footer-copyright-new {
            background: #0b0b1a;
            padding: 1.5rem 1.2rem 2rem;
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 1.2rem;
        }

        /* 售前咨询热线 */
        .hotline-bar {
            width: 100%;
            max-width: 600px;
            border: 1px solid rgba(255, 255, 255, 0.15);
            border-radius: 4px;
            padding: 0.7rem 1rem;
            text-align: center;
            background: rgba(255, 255, 255, 0.02);
        }
        .hotline-text {
            font-size: 0.95rem;
            color: rgba(255, 255, 255, 0.85);
            font-weight: 500;
            letter-spacing: 0.02em;
        }

        /* 二维码区域 */
        .qr-section {
            display: flex;
            justify-content: center;
            align-items: flex-start;
            gap: 2.5rem;
            padding: 0.5rem 0;
        }
        .qr-item {
            display: flex;
            flex-direction: column;
            align-items: center;
            gap: 0.6rem;
        }
        .qr-item img {
            width: 5.5rem;
            height: 5.5rem;
            object-fit: contain;
            border-radius: 4px;
            background: #ffffff;
            display: block;
        }
        .qr-label {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.6);
            font-weight: 400;
        }

        /* 分隔线 */
        .footer-divider {
            width: 100%;
            max-width: 600px;
            height: 1px;
            background: rgba(255, 255, 255, 0.1);
            margin: 0.3rem 0;
        }

        /* 备案信息 */
        .beian-section {
            display: flex;
            flex-direction: column;
            align-items: flex-start;
            gap: 0.5rem;
            width: 100%;
            max-width: 600px;
            padding-left: 0.5rem;
        }
        .beian-item {
            display: flex;
            align-items: center;
            gap: 0.5rem;
        }
        .beian-icon-img {
            width: 1.1rem;
            height: 1.1rem;
            flex-shrink: 0;
            display: block;
            object-fit: contain;
        }
        .beian-text {
            font-size: 0.85rem;
            color: rgba(255, 255, 255, 0.55);
            line-height: 1.6;
        }

        /* PC端底部版权适配 */
        @media (min-width: 1024px) {
            .footer-copyright-new {
                padding: 2.5rem 2rem 3rem;
                align-items: center;
            }
            .hotline-bar {
                max-width: 520px;
                padding: 0.85rem 1.5rem;
            }
            .hotline-text {
                font-size: 1.05rem;
            }
            .qr-section {
                gap: 4rem;
                padding: 1rem 0;
            }
            .qr-item img {
                width: 6.5rem;
                height: 6.5rem;
            }
            .qr-label {
                font-size: 0.95rem;
            }
            .footer-divider {
                max-width: 520px;
            }
            .beian-section {
                max-width: 520px;
                padding-left: 1rem;
                gap: 0.6rem;
            }
            .beian-icon-img {
                width: 1.2rem;
                height: 1.2rem;
            }
            .beian-text {
                font-size: 0.95rem;
            }
        }

        @media (prefers-reduced-motion: reduce) {
            .carousel-inner {
                transition: none;
            }
            .header {
                transition: none;
            }
            .solution-card {
                transition: none;
            }
            .solution-card:hover {
                transform: none;
            }
            .sidebar {
                transition: none;
            }
            .sidebar-overlay {
                transition: none;
            }
            .menu-btn span {
                transition: none;
            }
            .desktop-nav .dropdown {
                transition: none;
            }
            .desktop-nav .nav-item .nav-label::after {
                transition: none;
            }
            .feature-card {
                transition: none;
            }
            .feature-card:hover {
                transform: none;
            }
            .banner-nav .nav-btn {
                transition: none;
            }
            .banner-nav .nav-btn::after {
                transition: none;
            }
            .back-to-top {
                transition: none;
            }
        }
    
        /* ============================================================
           产品大分区展示模块
           ============================================================ */
        .product-zone-section {
            padding: 2.5rem 1.5rem 2rem;
            background: #ffffff;
        }

        .product-zone-inner {
            max-width: 1200px;
            margin: 0 auto;
        }

        .product-zone-title {
            font-size: 1.6rem;
            font-weight: 700;
            color: #1d1d1f;
            text-align: center;
            margin-bottom: 0.6rem;
        }

        .product-zone-desc {
            font-size: 0.95rem;
            color: #667085;
            line-height: 1.7;
            text-align: center;
            margin-bottom: 1.8rem;
            padding: 0 0.5rem;
        }

        .product-zone-link {
            color: #3b82f6;
            font-weight: 500;
            cursor: pointer;
            margin-left: 0.25rem;
            transition: color 0.2s ease;
        }
        .product-zone-link:hover {
            color: #1a4cff;
        }

        /* ===== 大分区导航标签 ===== */
        .zone-nav-wrapper {
            position: relative;
            margin-bottom: 1.2rem;
            background: #ffffff;
            border-radius: 4px;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
            border: 1px solid rgba(0, 0, 0, 0.04);
            display: flex;
            align-items: center;
            overflow: visible;
        }

        .zone-nav-scroll {
            display: flex;
            overflow-x: auto;
            overflow-y: hidden;
            scroll-behavior: smooth;
            -webkit-overflow-scrolling: touch;
            scrollbar-width: none;
            flex: 1;
            padding: 0 0.5rem;
            gap: 0;
        }
        .zone-nav-scroll::-webkit-scrollbar {
            display: none;
        }

        .zone-nav-item {
            flex-shrink: 0;
            padding: 0.85rem 1.1rem;
            font-size: 0.95rem;
            font-weight: 500;
            color: #1d1d1f;
            cursor: pointer;
            position: relative;
            transition: color 0.2s ease, background 0.2s ease;
            white-space: nowrap;
            border: none;
            background: transparent;
            font-family: inherit;
            letter-spacing: 0.01em;
        }
        .zone-nav-item:hover {
            color: #3b82f6;
            background: rgba(59, 130, 246, 0.04);
        }
        .zone-nav-item.active {
            color: #3b82f6;
            font-weight: 600;
        }
        .zone-nav-item.active::after {
            content: '';
            position: absolute;
            bottom: 0;
            left: 0.8rem;
            right: 0.8rem;
            height: 2px;
            background: #3b82f6;
            border-radius: 1px;
        }

        .zone-nav-arrow {
            width: 2.5rem;
            height: 2.5rem;
            display: flex;
            align-items: center;
            justify-content: center;
            cursor: pointer;
            flex-shrink: 0;
            color: #667085;
            transition: color 0.2s ease, transform 0.2s ease;
            border-left: 1px solid rgba(0, 0, 0, 0.04);
        }
        .zone-nav-arrow:hover {
            color: #3b82f6;
        }
        .zone-nav-arrow svg {
            width: 1.1rem;
            height: 1.1rem;
        }
        .zone-nav-arrow.open {
            transform: rotate(180deg);
        }
        .zone-nav-arrow.open svg {
            transform: rotate(180deg);
        }

        /* 下拉菜单 */
        .zone-dropdown {
            position: absolute;
            top: calc(100% + 0.4rem);
            right: 0;
            min-width: 200px;
            background: #ffffff;
            border-radius: 6px;
            box-shadow: 0 12px 40px rgba(0, 0, 0, 0.10);
            border: 1px solid rgba(0, 0, 0, 0.04);
            padding: 0.4rem 0;
            opacity: 0;
            visibility: hidden;
            transform: translateY(-4px) scale(0.98);
            transition: opacity 0.25s ease, transform 0.25s ease, visibility 0.25s ease;
            z-index: 100;
            pointer-events: none;
        }
        .zone-dropdown.open {
            opacity: 1;
            visibility: visible;
            transform: translateY(0) scale(1);
            pointer-events: auto;
        }
        .zone-dropdown-item {
            padding: 0.6rem 1.2rem;
            font-size: 0.9rem;
            color: #1d1d1f;
            cursor: pointer;
            transition: background 0.15s ease, color 0.15s ease;
            display: flex;
            align-items: center;
            justify-content: space-between;
            border-left: 3px solid transparent;
        }
        .zone-dropdown-item:hover {
            background: #f5f7ff;
            color: #1a4cff;
            border-left-color: #1a4cff;
        }
        .zone-dropdown-item.active {
            color: #3b82f6;
            font-weight: 600;
            background: #f5f7ff;
        }

        /* ===== 小分区卡片 ===== */
        .zone-cards-wrapper {
            display: flex;
            flex-direction: column;
            gap: 0.85rem;
        }

        .zone-card {
            background: #ffffff;
            border-radius: 4px;
            padding: 1.2rem 1.1rem;
            box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
            border: 1px solid rgba(0, 0, 0, 0.04);
            cursor: pointer;
            transition: transform 0.2s ease, box-shadow 0.25s ease, border-color 0.2s ease;
            position: relative;
            overflow: hidden;
        }
        .zone-card:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 28px rgba(0, 0, 0, 0.07);
            border-color: rgba(59, 130, 246, 0.15);
        }
        .zone-card:active {
            transform: scale(0.98);
        }

        .zone-card-header {
            display: flex;
            align-items: center;
            gap: 0.6rem;
            margin-bottom: 0.6rem;
        }
        .zone-card-title {
            font-size: 1.1rem;
            font-weight: 600;
            color: #1d1d1f;
        }
        .zone-card-tag {
            display: inline-flex;
            align-items: center;
            padding: 0.15rem 0.5rem;
            border-radius: 2px;
            font-size: 0.75rem;
            font-weight: 500;
            line-height: 1.4;
            flex-shrink: 0;
        }
        .zone-card-tag.hot {
            background: rgba(245, 158, 11, 0.1);
            color: #d97706;
            border: 1px solid rgba(245, 158, 11, 0.2);
        }
        .zone-card-tag.gaofang {
            background: rgba(239, 68, 68, 0.08);
            color: #dc2626;
            border: 1px solid rgba(239, 68, 68, 0.15);
        }
        .zone-card-tag.new {
            background: rgba(59, 130, 246, 0.08);
            color: #2563eb;
            border: 1px solid rgba(59, 130, 246, 0.15);
        }

        .zone-card-desc {
            font-size: 0.9rem;
            color: #667085;
            line-height: 1.7;
        }

        /* ===== 查看全部 ===== */
        .zone-view-all {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 0.3rem;
            margin-top: 1.5rem;
            padding: 0.8rem;
            color: #3b82f6;
            font-size: 0.95rem;
            font-weight: 500;
            cursor: pointer;
            transition: color 0.2s ease;
        }
        .zone-view-all:hover {
            color: #1a4cff;
        }
        .zone-view-all svg {
            width: 1rem;
            height: 1rem;
            transition: transform 0.2s ease;
        }
        .zone-view-all:hover svg {
            transform: translateY(2px);
        }

        .zone-view-all.expanded svg {
            transform: rotate(180deg);
        }
        .zone-view-all.expanded:hover svg {
            transform: rotate(180deg) translateY(-2px);
        }

        /* 卡片展开/收起 */
        .zone-card.hidden {
            display: none !important;
        }
        .zone-card {
            transition: transform 0.2s ease, box-shadow 0.25s ease, border-color 0.2s ease, opacity 0.3s ease;
        }
        .zone-card.fade-in {
            animation: zoneCardFadeIn 0.3s ease forwards;
        }
        @keyframes zoneCardFadeIn {
            from { opacity: 0; transform: translateY(8px); }
            to { opacity: 1; transform: translateY(0); }
        }

        /* ===== 加载状态 ===== */
        .zone-loading {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            gap: 0.8rem;
            padding: 3rem 1rem;
            color: #667085;
            font-size: 0.9rem;
        }
        .zone-loading-spinner {
            width: 1.5rem;
            height: 1.5rem;
            border: 2px solid #e5e7eb;
            border-top-color: #3b82f6;
            border-radius: 50%;
            animation: zoneSpin 0.8s linear infinite;
        }
        @keyframes zoneSpin {
            to { transform: rotate(360deg); }
        }

        .zone-empty {
            text-align: center;
            padding: 3rem 1rem;
            color: #667085;
            font-size: 0.95rem;
        }

        .zone-error {
            text-align: center;
            padding: 2rem 1rem;
            color: #dc2626;
            font-size: 0.9rem;
        }
        .zone-error button {
            margin-top: 0.8rem;
            padding: 0.4rem 1.2rem;
            background: #3b82f6;
            color: #fff;
            border: none;
            border-radius: 4px;
            font-size: 0.85rem;
            cursor: pointer;
        }

        /* ============================================================
           PC端响应式 (>=1024px)
           ============================================================ */
        @media (min-width: 1024px) {
            .product-zone-section {
                padding: 3rem 2rem 2.5rem;
            }
            .product-zone-title {
                font-size: 1.8rem;
            }
            .product-zone-desc {
                font-size: 1rem;
                margin-bottom: 2.2rem;
            }

            /* PC端导航标签不滚动，平铺展示 */
            .zone-nav-wrapper {
                margin-bottom: 1.5rem;
                border-radius: 6px;
            }
            .zone-nav-scroll {
                overflow-x: visible;
                padding: 0 0.8rem;
            }
            .zone-nav-item {
                padding: 1rem 1.5rem;
                font-size: 1rem;
            }
            .zone-nav-arrow {
                display: none;
            }
            .zone-dropdown {
                display: none !important;
            }

            /* PC端卡片网格布局 */
            .zone-cards-wrapper {
                display: grid;
                grid-template-columns: repeat(3, 1fr);
                gap: 1.2rem;
            }
            .zone-card {
                padding: 1.5rem 1.3rem;
            }
            .zone-card-title {
                font-size: 1.15rem;
            }
            .zone-card-desc {
                font-size: 0.95rem;
            }
        }

        /* ============================================================
           平板端 (768px - 1023px)
           ============================================================ */
        @media (min-width: 768px) and (max-width: 1023px) {
            .product-zone-section {
                padding: 2.2rem 1.5rem 1.8rem;
            }
            .zone-cards-wrapper {
                display: grid;
                grid-template-columns: repeat(2, 1fr);
                gap: 1rem;
            }
            .zone-nav-arrow {
                display: none;
            }
            .zone-dropdown {
                display: none !important;
            }
        }

        /* ============================================================
           移动端 (<=767px)
           ============================================================ */
        @media (max-width: 767px) {
            .product-zone-section {
                padding: 2rem 1rem 1.5rem;
            }
            .product-zone-title {
                font-size: 1.4rem;
            }
            .product-zone-desc {
                font-size: 0.85rem;
                margin-bottom: 1.4rem;
            }
            .zone-nav-item {
                padding: 0.7rem 0.9rem;
                font-size: 0.9rem;
            }
            .zone-card {
                padding: 1rem 0.9rem;
            }
            .zone-card-title {
                font-size: 1rem;
            }
            .zone-card-desc {
                font-size: 0.85rem;
            }
        }

        @media (prefers-reduced-motion: reduce) {
            .zone-card {
                transition: none;
            }
            .zone-card:hover {
                transform: none;
            }
            .zone-nav-item {
                transition: none;
            }
            .zone-loading-spinner {
                animation: none;
            }
        }