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

        :root {
            --primary: #0d6efd;
            --primary-dark: #0a58ca;
            --primary-light: #e7f1ff;
            --teal: #0dcaf0;
            --teal-dark: #0aa9c9;
            --green: #2a9d8f;
            --green-dark: #21867a;
            --dark: #1a2332;
            --gray-50: #f8fafc;
            --gray-100: #f1f5f9;
            --gray-200: #e2e8f0;
            --gray-300: #cbd5e1;
            --gray-500: #64748b;
            --gray-600: #475569;
            --gray-700: #334155;
            --gray-800: #1e293b;
            --white: #ffffff;
            --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
            --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.08);
            --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.12);
            --radius: 12px;
            --radius-sm: 8px;
            --max-width: 1200px;
        }

        html {
            scroll-behavior: smooth;
        }

        body {
            font-family: "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", "Helvetica Neue", Arial, sans-serif;
            color: var(--gray-700);
            line-height: 1.8;
            background: var(--white);
            font-size: 15px;
        }



        /* ========== 顶部栏 ========== */
        .topbar {
            background: var(--dark);
            color: #adb5bd;
            font-size: 13px;
            padding: 8px 0;
        }

        .topbar .container {
            display: flex;
            justify-content: space-between;
            align-items: center;
        }

        .topbar-left {
            display: flex;
            gap: 24px;
        }

        .topbar-left span {
            display: flex;
            align-items: center;
            gap: 6px;
        }

        .topbar-left svg {
            width: 14px;
            height: 14px;
            flex-shrink: 0;
        }

        .topbar-right a {
            color: #adb5bd;
            margin-left: 16px;
        }

        .topbar-right a:hover {
            color: var(--white);
        }

        /* ========== 导航栏 ========== */
        .navbar {
            background: var(--white);
            box-shadow: var(--shadow-sm);
            position: sticky;
            top: 0;
            z-index: 1000;
            transition: box-shadow 0.3s ease;
        }

        .navbar .container {
            display: flex;
            align-items: center;
            justify-content: space-between;
            height: 72px;
        }

        .logo {
            display: flex;
            align-items: center;
            gap: 10px;
            font-size: 22px;
            font-weight: 700;
            color: var(--primary);
        }

        .logo-icon {
            width: 40px;
            height: 40px;
            background: linear-gradient(135deg, var(--primary), var(--teal));
            border-radius: 10px;
            display: flex;
            align-items: center;
            justify-content: center;
            color: white;
            font-size: 22px;
        }

        .nav-menu {
            display: flex;
            align-items: center;
            gap: 4px;
        }

        .nav-menu > li {
            position: relative;
        }

        .nav-menu > li > a {
            display: flex;
            align-items: center;
            gap: 4px;
            padding: 10px 18px;
            font-size: 15px;
            font-weight: 500;
            color: var(--gray-700);
            border-radius: var(--radius-sm);
        }

        .nav-menu > li > a:hover,
        .nav-menu > li.active > a {
            color: var(--primary);
            background: var(--primary-light);
        }

        .nav-menu > li > a .arrow {
            font-size: 11px;
            transition: transform 0.3s;
        }

        .nav-menu > li:hover > a .arrow {
            transform: rotate(180deg);
        }

        /* 下拉菜单 */
        .dropdown {
            position: absolute;
            top: 100%;
            left: 0;
            min-width: 180px;
            background: var(--white);
            box-shadow: var(--shadow-lg);
            border-radius: var(--radius-sm);
            padding: 8px 0;
            opacity: 0;
            visibility: hidden;
            transform: translateY(10px);
            transition: all 0.3s ease;
        }

        .nav-menu > li:hover .dropdown {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        .dropdown li a {
            display: block;
            padding: 10px 20px;
            font-size: 14px;
            color: var(--gray-600);
        }

        .dropdown li a:hover {
            background: var(--primary-light);
            color: var(--primary);
            padding-left: 24px;
        }

        .dropdown li a.current {
            color: var(--primary);
            font-weight: 600;
            background: var(--primary-light);
        }

        /* ========== 面包屑 ========== */
        .breadcrumb {
            background: var(--gray-100);
            padding: 14px 0;
            font-size: 14px;
            color: var(--gray-500);
        }

        .breadcrumb a {
            color: var(--gray-500);
        }

        .breadcrumb a:hover {
            color: var(--primary);
        }

        .breadcrumb .separator {
            margin: 0 8px;
            color: var(--gray-300);
        }

        .breadcrumb .current {
            color: var(--primary);
            font-weight: 500;
        }

        /* ========== Hero 横幅 ========== */
        .hero {
            position: relative;
            height: 420px;
            display: flex;
            align-items: center;
            justify-content: center;
            overflow: hidden;
            background: linear-gradient(135deg, #0a3d62 0%, #0c6fa8 50%, #0d6efd 100%);
        }

        .hero::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='80' height='80' viewBox='0 0 80 80'%3E%3Cg fill='none' stroke='%23ffffff' stroke-opacity='0.05' stroke-width='1'%3E%3Ccircle cx='40' cy='40' r='30'/%3E%3Ccircle cx='40' cy='40' r='20'/%3E%3Ccircle cx='40' cy='40' r='10'/%3E%3C/g%3E%3C/svg%3E");
        }

        .hero::after {
            content: '';
            position: absolute;
            inset: 0;
            background: linear-gradient(180deg, transparent 0%, rgba(10, 61, 98, 0.4) 100%);
        }

        .hero-content {
            position: relative;
            z-index: 2;
            text-align: center;
            color: white;
            max-width: 800px;
            padding: 0 20px;
        }

        .hero-badge {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            background: rgba(255, 255, 255, 0.15);
            backdrop-filter: blur(10px);
            border: 1px solid rgba(255, 255, 255, 0.25);
            padding: 6px 18px;
            border-radius: 50px;
            font-size: 14px;
            margin-bottom: 20px;
        }

        .hero h1 {
            font-size: 42px;
            font-weight: 800;
            margin-bottom: 16px;
            letter-spacing: 2px;
            text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
        }

        .hero p {
            font-size: 18px;
            opacity: 0.9;
            line-height: 1.8;
        }

        .hero-stats {
            display: flex;
            justify-content: center;
            gap: 50px;
            margin-top: 36px;
        }

        .hero-stat {
            text-align: center;
        }

        .hero-stat-num {
            font-size: 36px;
            font-weight: 800;
            color: var(--teal);
        }

        .hero-stat-label {
            font-size: 14px;
            opacity: 0.8;
        }

        /* ========== 通用区块标题 ========== */


        .section-header {
            text-align: center;
            margin-bottom: 50px;
        }

        .section-header .label {
            display: inline-block;
            color: var(--primary);
            font-size: 14px;
            font-weight: 600;
            letter-spacing: 3px;
            text-transform: uppercase;
            margin-bottom: 12px;
        }

        .section-header h2 {
            font-size: 34px;
            font-weight: 700;
            color: var(--dark);
            margin-bottom: 16px;
        }

        .section-header .divider {
            width: 60px;
            height: 4px;
            background: linear-gradient(90deg, var(--primary), var(--teal));
            margin: 0 auto 16px;
            border-radius: 2px;
        }

        .section-header p {
            color: var(--gray-500);
            font-size: 16px;
            max-width: 700px;
            margin: 0 auto;
        }

        /* ========== 简介区块 ========== */
        .intro {
            background: var(--gray-50);
        }

        .intro-wrapper {
            display: grid;
            grid-template-columns: 1fr 2fr;
            gap: 20px;
            align-items: center;
        }

        .intro-text h2 {
            font-size: 26px;
            color: var(--dark);
            margin-bottom: 20px;
            font-weight: 700;
            text-align: left;
        }

        .intro-text .highlight {
            color: var(--primary);
        }

        .intro-text p {
            color:#333333;
            font-size: 16px;
            margin-bottom: 0px;
            line-height: 2;
            text-align: left;
        }

        .intro-tags {
            display: flex;
            flex-wrap: wrap;
            gap: 10px;
            margin-top: 10px;
        }

        .intro-tag {
            display: inline-flex;
            align-items: center;
            gap: 6px;
            padding: 8px 16px;
            background: white;
            border: 1px solid #4fabd1;
            border-radius: 50px;
            font-size: 13px;
            color: var(--gray-600);
            font-weight: 500;
        }

        .intro-tag img {
            width: 16px;
            height: 16px;
            color: var(--green);
        }

        .intro-visual {
            position: relative;
        }

        .intro-card {
            background: white;
            border-radius: var(--radius);
            padding: 36px;
            box-shadow: var(--shadow-lg);
            position: relative;
            overflow: hidden;
        }

        .intro-card::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 5px;
            background: linear-gradient(90deg, var(--primary), var(--teal), var(--green));
        }

        .intro-card-icon {
            width: 64px;
            height: 64px;
            background: linear-gradient(135deg, var(--primary), var(--teal));
            border-radius: 16px;
            display: flex;
            align-items: center;
            justify-content: center;
            margin-bottom: 20px;
            color: white;
        }

        .intro-card-icon svg {
            width: 36px;
            height: 36px;
        }

        .intro-card h3 {
            font-size: 20px;
            color: var(--dark);
            margin-bottom: 12px;
        }

        .intro-card p {
            font-size: 14px;
            color: var(--gray-500);
            line-height: 1.8;
        }

        .intro-card-stats {
            display: grid;
            grid-template-columns: repeat(3, 1fr);
            gap: 16px;
            margin-top: 24px;
            padding-top: 24px;
            border-top: 1px solid var(--gray-200);
        }

        .intro-card-stat {
            text-align: center;
        }

        .intro-card-stat .num {
            font-size: 24px;
            font-weight: 800;
            color: var(--primary);
        }

        .intro-card-stat .label {
            font-size: 12px;
            color: var(--gray-500);
            margin-top: 4px;
        }

        /* ========== 产品区块 ========== */
        .products {
            background: white;
        }

        .product-block {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 50px;
            align-items: center;
            margin-bottom: 80px;
        }

        .product-block:last-child {
            margin-bottom: 0;
        }

        .product-block.reverse {
            direction: rtl;
        }

        .product-block.reverse > * {
            direction: ltr;
        }

        .product-visual {
            position: relative;
            border-radius: var(--radius);
            overflow: hidden;
            min-height: 380px;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        /* 净水设备视觉 */
  /*      .visual-purification {
            background: linear-gradient(135deg, #e3f2fd 0%, #bbdefb 50%, #90caf9 100%);
        }

        .visual-wastewater {
            background: linear-gradient(135deg, #e0f2f1 0%, #b2dfdb 50%, #80cbc4 100%);
        }

        .visual-disinfection {
            background: linear-gradient(135deg, #fff3e0 0%, #ffe0b2 50%, #ffcc80 100%);
        }
*/
        .product-illustration {
            width: 100%;
            height: 100%;
            position: absolute;
            inset: 0;
            display: flex;
            align-items: center;
            justify-content: center;
        }

        .product-illustration svg {
            width: 80%;
            max-width: 320px;
            height: auto;
        }

        .product-badge {
            position: absolute;
            top: 20px;
            left: 20px;
            background: rgba(255, 255, 255, 0.95);
            backdrop-filter: blur(10px);
            padding: 8px 16px;
            border-radius: 50px;
            font-size: 13px;
            font-weight: 600;
            color: var(--dark);
            display: flex;
            align-items: center;
            gap: 6px;
            z-index: 2;
            box-shadow: var(--shadow-sm);
        }

        .product-badge .dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
        }

        .badge-purification .dot { background: var(--primary); }
        .badge-wastewater .dot { background: var(--green); }
        .badge-disinfection .dot { background: #f57c00; }

        .product-info {
            padding: 10px 0;
            text-align: left;
        }

        .product-number {
            font-size: 60px;
            font-weight: 800;
            color: var(--gray-200);
            line-height: 1;
            margin-bottom: 8px;
        }

        .product-info h3 {
            font-size: 26px;
            color: #3266d0;
            margin-bottom: 8px;
            margin-top: 0px;
            font-weight: 700;
            text-align: left;
        }

        .product-subtitle {
            font-size: 18px;
            color: #f15a24;
            margin-bottom: 10px;
            font-weight: 500;
        }

        .product-desc {
            color: #333333;
            line-height: 2;
            margin-bottom: 10px;
            font-size: 16px;
        }

        /* 应用场景 */
        .scenarios {
            margin-bottom: 10px;
        }

        .scenarios-title {
            font-size: 20px;
            font-weight: 600;
            color: var(--dark);
            margin-bottom: 10px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .scenarios-title svg {
            width: 20px;
            height: 20px;
            color: var(--primary);
        }

        .scenario-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 10px;
        }

        .scenario-item {
            /*display: flex;*/
            align-items: flex-start;
            gap: 8px;
            font-size: 16px;
            color: var(--gray-600);
            padding: 10px 14px;
            background: var(--gray-50);
            border-radius: var(--radius-sm);
            border: 1px solid var(--gray-200);
            text-align: center;
        }

        .scenario-item .check {
            width: 18px;
            height: 18px;
            color: var(--green);
            flex-shrink: 0;
            margin-top: 2px;
        }

        /* 优势 */
        .advantages {
            background: var(--gray-50);
            border-radius: var(--radius);
            padding: 15px 20px;
            border: 1px solid var(--gray-200);
        }

        .advantages-title {
            font-size: 20px;
            font-weight: 600;
            color: var(--dark);
            margin-bottom: 14px;
            display: flex;
            align-items: center;
            gap: 8px;
        }

        .advantages-title svg {
            width: 20px;
            height: 20px;
            color: var(--green);
        }

        .advantage-list {
            display: grid;
            grid-template-columns: 1fr 1fr;
            gap: 10px;
        }

        .advantage-item {
            display: flex;
            align-items: flex-start;
            gap: 8px;
            font-size: 16px;
            color: var(--gray-600);
        }

        .advantage-item .icon {
            width: 20px;
            height: 20px;
            background: #3266d0;
            color: white;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: 11px;
            flex-shrink: 0;
            margin-top: 2px;
            position: relative;
            top:3px;
            left:0px;
        }

        /* ========== 为什么选择我们 ========== */
        .why-us {
            background: var(--gray-50);
        }

        .why-grid {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
        }

        .why-card {
            text-align: center;
            padding: 36px 20px;
            border-radius: var(--radius);
            border: 1px solid var(--gray-200);
            background: white;
            transition: all 0.3s ease;
            border-top:3px solid #0071bc;
        }

        .why-card:hover {
            border-color: var(--primary);
            box-shadow: var(--shadow-md);
            transform: translateY(-4px);
            border-top:3px solid #0071bc;
        }

        .why-icon {
            width: 72px;
            height: 72px;
            margin: 0 auto 20px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            background: var(--primary-light);
        }

        .why-icon svg {
            width: 36px;
            height: 36px;
            color: var(--primary);
        }

        .why-card:nth-child(2) .why-icon { background: #e0f2f1; }
        .why-card:nth-child(2) .why-icon svg { color: var(--green); }
        .why-card:nth-child(3) .why-icon { background: #fff3e0; }
        .why-card:nth-child(3) .why-icon svg { color: #f57c00; }
        .why-card:nth-child(4) .why-icon { background: #f3e5f5; }
        .why-card:nth-child(4) .why-icon svg { color: #8e24aa; }

        .why-card h4 {
            font-size: 18px;
            color: var(--dark);
            margin-bottom: 10px;
            font-weight: 700;
        }

        .why-card p {
            font-size: 16px;
            color: #333;
            line-height: 1.8;
            padding:0px;
            text-align: left;
        }

        /* ========== CTA ========== */
        .cta {
            background: #0686b1;
            padding: 60px 0;
            text-align: center;
            color: white;
            position: relative;
            overflow: hidden;
        }

        .cta::before {
            content: '';
            position: absolute;
            inset: 0;
            background: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='60' height='60' viewBox='0 0 60 60'%3E%3Cg fill='none' stroke='%23ffffff' stroke-opacity='0.04' stroke-width='1'%3E%3Cpath d='M30 5 L55 30 L30 55 L5 30 Z'/%3E%3C/g%3E%3C/svg%3E");
        }

        .cta-content {
            position: relative;
            z-index: 2;
        }

        .cta h2 {
            font-size: 30px;
            font-weight: 700;
            margin-bottom: 12px;
        }

        .cta p {
            font-size: 16px;
            opacity: 0.9;
            margin-bottom: 28px;
        }

        .cta-buttons {
            display: flex;
            justify-content: center;
            gap: 16px;
        }

        .btn {
            display: inline-flex;
            align-items: center;
            gap: 8px;
            padding: 14px 32px;
            border-radius: 50px;
            font-size: 15px;
            font-weight: 600;
            transition: all 0.3s ease;
            cursor: pointer;
            border: none;
        }

        .btn-primary {
            background: white;
            color: #0071bc !important;
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 8px 25px rgba(255, 255, 255, 0.3);
            color:#fff !important;
        }

        .btn-outline {
            background: transparent;
            color: white;
            border: 2px solid rgba(255, 255, 255, 0.5);
        }

        .btn-outline:hover {
            background: rgba(255, 255, 255, 0.1);
            border-color: white;
        }

        /* ========== 底部 ========== */
        .footer {
            background: var(--dark);
            color: #94a3b8;
            padding: 60px 0 0;
        }

        .footer-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr 1fr;
            gap: 40px;
            padding-bottom: 40px;
            border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        }

        .footer-brand .logo {
            color: white;
            margin-bottom: 16px;
        }

        .footer-brand p {
            font-size: 14px;
            line-height: 1.9;
            margin-bottom: 20px;
        }

        .footer-contact li {
            font-size: 14px;
            padding: 6px 0;
            display: flex;
            align-items: center;
            gap: 10px;
        }

        .footer-contact svg {
            width: 16px;
            height: 16px;
            flex-shrink: 0;
            color: var(--teal);
        }

        .footer-col h4 {
            color: white;
            font-size: 16px;
            margin-bottom: 20px;
            font-weight: 600;
        }

        .footer-col ul li {
            margin-bottom: 12px;
        }

        .footer-col ul li a {
            font-size: 14px;
            color: #94a3b8;
        }

        .footer-col ul li a:hover {
            color: var(--teal);
            padding-left: 4px;
        }

        .footer-bottom {
            text-align: center;
            padding: 20px 0;
            font-size: 13px;
            color: #64748b;
        }

        /* ========== 响应式 ========== */
        @media (max-width: 968px) {
            .nav-menu { display: none; }
            .intro-wrapper,
            .product-block {
                grid-template-columns: 1fr;
                gap: 30px;
            }
            .product-block.reverse { direction: ltr; }
            .why-grid {
                grid-template-columns: 1fr;
            }
            .hero h1 { font-size: 28px; }
            .hero p { font-size: 15px; }
            .hero-stats { gap: 24px; }
            .hero-stat-num { font-size: 28px; }
            .footer-grid {
                grid-template-columns: 1fr 1fr;
            }
            .section { padding: 50px 0; }
            .section-header h2 { font-size: 26px; }
            .scenario-list,
            .advantage-list {
                grid-template-columns: 1fr;
            }
        }