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

        html {
            font-size: 16px;
        }

        /* 平板端  */
        @media (min-width: 768px) and (max-width: 1024px) {
            html {
                font-size: 15px;
            }
        }

        /* 手机端  */
        @media (max-width: 767px) {
            html {
                font-size: 10px;
            }
        }

        body {
            width: 100%;
            margin: 0;
            overflow-x: hidden;
            font-family: system-ui, 'Segoe UI', '宋体', sans-serif;
        }

        a {
            color: black;
            text-decoration: none;
        }


        /* ---------- 全局容器 ---------- */
        #base {
            position: relative;
            z-index: 0;
            padding-bottom: 5rem;
            min-height: 100vh;
        }

        /* ---------- 顶栏  ---------- */
        .topbanner {
            position: fixed;
            top: 0;
            left: 0;
            width: 100%;
            height: 5.375rem;
            transition: all 0.3s ease;
            box-shadow: none;
            z-index: 1000;
            background: transparent;
        }

        .tbstate0 {
            position: relative;
            width: 100%;
            height: 100%;
        }

        /* LOGO区域 */
        .logo {
            position: absolute;
            left: 3vw;
            top: 50%;
            transform: translateY(-50%);
            width: 4vw;
            height: auto;
        }
        .img_logo {
            width: 100%;
            height: auto;
            display: block;
        }

        /* 公司名称 */
        .name0 {
            position: absolute;
            left: 10vw;
            top: 50%;
            transform: translateY(-50%);
            font-family: "Title", sans-serif !important;
            font-size: 1.875rem;
            font-weight: 700;
            white-space: nowrap;
        }
        .text_name0 p {
            font-size: 1.875rem;
        }

        /* 桌面端导航项 */
        .fragment0 {
            position: absolute;
            top: 50%;
            transform: translateY(-50%);
            font-size: 1.25rem;
            font-family: '宋体', sans-serif;
            cursor: pointer;
        }
        .fragment0 a {
            text-decoration: none;
            transition: color 0.2s ease;
            position: relative;
        }
        .fragment0 a::after {
            content: '';
            position: absolute;
            bottom: -0.25rem;
            left: 0;
            width: 0;
            height: 2px;
            background-color: orange;
            transition: width 0.3s ease;
        }
        .fragment0 a:hover {
            color: orange !important;
        }
        .fragment0 a:hover::after {
            width: 100%;
        }
        /* 原始各位置  */
        .fragment0:first-of-type { left: 45vw; }
        .fragment0:nth-of-type(2) { left: 53vw; }
        .fragment0:nth-of-type(3) { left: 61vw; }
        .fragment0:nth-of-type(4) { left: 69vw; }
        .fragment0:nth-of-type(5) { left: 77vw; }

        /* 汉堡菜单按钮  */
        .hamburger {
            display: none;
            flex-direction: column;
            justify-content: space-between;
            width: 1.8rem;
            height: 1.5rem;
            cursor: pointer;
            position: absolute;
            right: 2rem;
            top: 50%;
            transform: translateY(-50%);
            z-index: 1100;
        }
        .hamburger span {
            width: 100%;
            height: 0.2rem;
            background: black;
            border-radius: 2px;
            transition: 0.2s;
        }

        /* 滚动/悬停 顶栏颜色切换 */
        .topbanner.scrolled,
        .topbanner:not(.scrolled):hover {
            background: white;
            box-shadow: 0 0.25rem 0.75rem rgba(0,0,0,0.1);
        }
        .topbanner:not(.scrolled) .fragment0 a,
        .topbanner:not(.scrolled) .name0 {
            color: white;
        }
        .topbanner.scrolled .fragment0 a,
        .topbanner.scrolled .name0,
        .topbanner:not(.scrolled):hover .fragment0 a,
        .topbanner:not(.scrolled):hover .name0 {
            color: black;
        }
        .topbanner.scrolled .logo img,
        .topbanner:not(.scrolled):hover .logo img {
            filter: none;
        }
        .fragment0 {
            display: block;
        }
        .hamburger {
            display: none;
        }
        .mobile-menu-panel {
            display: none;
        }
        /* 移动端菜单面板 */

        /* ---------- 大图 ---------- */
        .hero-banner {
            width: 100%;
            height: 80vh;
            margin-top: 0;
            overflow: hidden;
            position: relative;
            z-index: 1;
        }
        .hero-banner img {
            width: 100%;
            height: 100%;
            object-fit: cover;
        }

        /* ---------- 关于我们  ---------- */
        .about-section {
            padding: 0;
            position: relative;
            overflow: hidden;
            width: 100%;
            background-image: url("/static/resource/禧泰1.jpg");
            background-size: cover;
            background-position: center;
        }
        .about-section::before {
            content: '';
            position: absolute;
            top: 0; left: 0;
            width: 100%; height: 100%;
            background: linear-gradient(to left, rgba(242,247,255,0) 0%, #f2f7ff 70%);
            z-index: 1;
            pointer-events: none;
        }
        .about-container {
            max-width: 81.25rem;
            margin: 0 auto;
            display: flex;
            align-items: center;
            position: relative;
            z-index: 2;
            padding: 4rem 1.25rem;
            gap: 2rem;
            flex-wrap: wrap;
        }
        .about-text {
            flex: 1.2;
            min-width: 18rem;
            text-align: left;
        }
        .about-subtitle {
            font-size: 1rem;
            color: #145E59;
            margin-bottom: 0.9375rem;
            font-weight: 500;
            letter-spacing: 1px;
        }
        .about-title {
            font-size: 2.625rem;
            color: #1c2331;
            margin-bottom: 1.75rem;
            line-height: 1.3;
            font-weight: 700;
            text-align: center;
        }
        .about-desc {
            font-size: 1rem;
            color: #555;
            line-height: 1.9;
            margin-bottom: 1.25rem;
        }
        .about-stats {
            flex: 0.8;
            min-width: 14rem;
            display: flex;
            flex-direction: column;
            gap: 2.5rem;
            padding-left: 2rem;
        }
        .stat-item {
            background: transparent;
        }
        .stat-number {
            font-size: 3.25rem;
            font-weight: 700;
            color: #145E59;
            margin-bottom: 0.375rem;
            line-height: 1;
        }
        .stat-label {
            font-size: 1rem;
            color: #666;
        }

        /* ---------- 核心产品区域 ---------- */
        .products-section {
            width: 100%;
            padding: 6rem 0;
            background: #F2F7FF;
            height: 66rem;
        }
        .container {
            max-width: 75rem;
            margin: 0 auto;
            padding: 0 1.25rem;
        }
        .section-head {
            text-align: center;
            margin-bottom: 3.75rem;
        }
        .section-subtitle {
            font-size: 1rem;
            color: #145E59;
            margin-bottom: 0.75rem;
            font-weight: 500;
        }
        .section-title {
            font-size: 2.375rem;
            color: #1c2331;
            margin-bottom: 1rem;
            font-weight: 700;
            text-align: center;
        }
        .section-desc {
            font-size: 1rem;
            color: #666;
            max-width: 37.5rem;
            margin: 0 auto;
            line-height: 1.8;
        }
        .products-grid {
            display: grid;
            grid-template-columns: 2fr 1fr 1fr;
            grid-template-rows: 1fr 1fr;
            gap: 1.5rem;
            height: 31.25rem;
        }
        .card1 { grid-row: 1 / 3; grid-column: 1 / 2; }
        .card2 { grid-row: 1 / 2; grid-column: 2 / 4; }
        .card3 { grid-row: 2 / 3; grid-column: 2 / 3; }
        .card4 { grid-row: 2 / 3; grid-column: 3 / 4; }
        .product-card {
            background: #f8faff;
            padding: 2rem 1.5rem;
            border-radius: 1.125rem;
            display: flex;
            flex-direction: column;
            justify-content: center;
            align-items: center;
            text-align: center;
            transition: 0.3s ease;
            height: 100%;
            box-sizing: border-box;
        }
        .product-card:hover {
            transform: translateY(-0.375rem);
            box-shadow: 0 0.75rem 1.875rem rgba(74,108,247,0.12);
        }
        .product-icon {
            width: 100%;
            aspect-ratio: 16/9;
            margin-bottom: 1.25rem;
            overflow: hidden;
            border-radius: 0.75rem;
        }
        .product-icon img {
            width: 100%;
            height: 100%;
            object-fit: cover;
            transition: 0.4s;
        }
        .product-card:hover .product-icon img {
            transform: scale(1.05);
        }
        .product-card h3 {
            font-size: 1.25rem;
            color: #222;
            margin-bottom: 0.75rem;
            font-weight: 600;
        }
        .product-card p {
            font-size: 0.9375rem;
            color: #666;
            line-height: 1.7;
        }

        /* ---------- 轮播环境区域  ---------- */
        .content scroll-reveal{
            margin-top:6vh;
        }
        .carousel-container {
            width: 100%;
            overflow: hidden;
            position: relative;
            margin: 2rem auto;
            padding: 0 2rem;
        }
        .carousel-track {
            display: flex;
            align-items: center;
            transition: transform 0.4s ease;
            gap: 1.25rem;
            padding: 0.625rem 0;
        }
        .carousel-track img {
            width: 60%;
            height: 25rem;
            object-fit: cover;
            border-radius: 0.5rem;
            box-shadow: 0 0.25rem 0.75rem rgba(0,0,0,0.15);
            flex-shrink: 0;
            transition: all 0.3s ease;
            cursor: pointer;
        }
        .carousel-track img:hover {
            transform: translateY(-0.5rem) scale(1.02);
            box-shadow: 0 0.75rem 1.5rem rgba(0,0,0,0.2);
        }
        .carousel-arrow {
            position: absolute;
            top: 50%;
            transform: translateY(-50%);
            width: 2.75rem;
            height: 2.75rem;
            border-radius: 50%;
            background: rgba(255,255,255,0.9);
            border: none;
            font-size: 1.4rem;
            color: #333;
            cursor: pointer;
            box-shadow: 0 0.125rem 0.5rem rgba(0,0,0,0.2);
            transition: all 0.2s ease;
            z-index: 10;
        }
        .carousel-arrow.left { left: 0.5rem; }
        .carousel-arrow.right { right: 0.5rem; }
        .carousel-arrow:hover {
            background: #145E59;
            color: white;
            transform: translateY(-50%) scale(1.05);
        }

        /* 动画滚动 */
        .scroll-reveal {
            opacity: 0;
            transform: translateY(5rem);
            transition: all 0.8s ease;
        }
        .scroll-reveal.active {
            opacity: 1;
            transform: translateY(0);
        }

        /*  企业文化  */
        .culture-container {
            width: 100%;
            padding: 4rem 0 2rem;
        }
        .values-grid {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(17rem, 1fr));
            gap: 2rem;
            max-width: 75rem;
            margin: 2rem auto;
            padding: 0 1.25rem;
        }
        .value-card {
            background: #f9f9f9;
            padding: 2.5rem 1.5rem;
            border-radius: 0.5rem;
            text-align: center;
            transition: 0.2s;
        }
        .value-icon {
            width: 3.75rem;
            height: 3.75rem;
            margin: 0 auto 1.25rem;
            background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="%23d12026" stroke-width="2"><path d="M12 2L2 7l10 5 10-5-10-5zM2 17l10 5 10-5M2 12l10 5 10-5"/></svg>') center/contain no-repeat;
        }
        .value-title {
            font-size: 1.125rem;
            color: #333;
            margin-bottom: 0.9rem;
            font-weight: 600;
        }
        .value-desc {
            font-size: 0.875rem;
            color: #666;
            line-height: 1.6;
        }

        /* 企业发展理念 */
        .development-section {
            background: url('https://picsum.photos/id/1048/1920/600') center/100% 100%;
            position: relative;
            color: #ffffff;
            margin-top: 3rem;
            border-radius: 0;
        }
        .development-section::before {
            content: "";
            position: absolute;
            top: 0;
            left: 0;
            width: 100%;
            height: 100%;
            background: rgba(0, 0, 0, 0.7);
            z-index: 0;
        }
        .development-content {
            position: relative;
            max-width: 75rem;
            margin: 0 auto;
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(12rem, 1fr));
            gap: 2rem;
            text-align: center;
            z-index: 2;
            padding: 6rem 1.25rem;
        }
        .development-item {
            padding: 1rem;
        }
        .dev-icon {
            width: 3rem;
            height: 3rem;
            margin: 0 auto 1rem;
            background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24" fill="none" stroke="%23ffffff" stroke-width="2"><path d="M20.24 12.24a6 6 0 0 0-8.49-8.49L5 10.5V19h8.5z"/><line x1="16" y1="8" x2="2" y2="22"/><line x1="17.5" y1="15" x2="9" y2="15"/></svg>') center/contain no-repeat;
        }
        .dev-title {
            font-size: 1rem;
            margin-bottom: 0.6rem;
            font-weight: 600;
        }
        .dev-desc {
            font-size: 0.9rem;
            line-height: 1.5;
            opacity: 0.9;
        }
 /* ---------- 底栏  ---------- */
        .footer {
            width: 100%;
            background: #d7d7d7;
            padding: 3rem 5vw;
            display: flex;
            flex-wrap: wrap;
            justify-content: space-between;
            align-items: center;
            gap: 1.5rem;
            font-size: 0.85rem;
            bottom: 0;
            position:absolute;
        }
        .footer-left {
            display: flex;
            align-items: center;
            gap: 1rem;
        }
        .footer-logo {
            height: 2.5rem;
            width: auto;
        }
        .footer-company {
            font-size: 1.2rem;
            font-weight: 700;
            white-space: nowrap;
        }
        .footer-nav {
            display: flex;
            flex-wrap: wrap;
            gap: 1rem;
        }
        .footer-nav a {
            font-size: 0.9rem;
        }
        .footer-nav a:hover {
            color: #145E59;
            text-decoration: underline;
        }
        .footer-right {
            display: flex;
            flex-direction: column;
            align-items: flex-end;
            gap: 0.3rem;
        }
        .footer-copyright {
            font-size: 0.7rem;
        }
        .footer-icp {
            display: flex;
            align-items: center;
            gap: 0.3rem;
            font-size: 0.7rem;
        }
        .footer-icp img {
            width: 1rem;
            height: 1rem;
        }

        /* ========== 手机 & 平板响应式  ========== */
        @media (max-width: 1024px) {
        .mobile-menu-panel {
            position: fixed;
            top: 5.375rem;
            left: 0;
            width: 100%;
            background: white;
            transform: translateY(-130%);
            transition: transform 0.3s ease;
            z-index: 999;
            padding: 1.5rem 2rem;
            border-radius: 0 0 1rem 1rem;
            display: flex;
            flex-direction: column;
            gap: 1.2rem;
        }
        .mobile-menu-panel.open {
            transform: translateY(0);
        }
        .mobile-menu-panel a {
            font-size: 1.25rem;
            font-weight: 500;
            color: #1c2331;
            padding: 0.5rem 0;
            border-bottom: 1px solid #eee;
            transition: color 0.2s;
        }
        .mobile-menu-panel a:hover {
            color: orange;
        }

            .fragment0 {
                display: none;
            }
            .hamburger {
                display: flex;
            }

            .name0 {
                left: 15vw;
                font-size: 1.4rem;
                white-space: nowrap;
            }
            .name0 .text_name0 p {
                font-size: 1.4rem;
            }
            .topbanner {
                height: 4.2rem;
            }

            .products-grid {
                height: auto;
                grid-template-columns: 1fr;
                grid-auto-rows: auto;
                gap: 1rem;
            }
            .card1, .card2, .card3, .card4 {
                grid-column: auto;
                grid-row: auto;
            }
            .product-card {
                padding: 1.5rem;
            }
            .about-container {
                flex-direction: column;
                text-align: center;
            }
            .about-stats {
                padding-left: 0;
                align-items: center;
            }
            .about-text {
                padding-right: 0;
            }
            .carousel-track img {
                width: 85%;
                height: 18rem;
            }
        }

        /* 手机端 */
        @media (max-width: 767px) {
           .name0 {
                left: 18vw;
                font-size: 1rem;
            }
            .name0 .text_name0 p {
                font-size: 1.5rem;
            }
            .mobile-menu-panel {
                position: fixed;
                top: 5.375rem;
                left: 0;
                width: 100%;
                background: white;
                transform: translateY(-126%);
                transition: transform 0.3s ease;
                z-index: 999;

            }
            .mobile-menu-panel.open {
                transform: translateY(0);
            }
            .logo {
                width: 10vw;
            }
            .hero-banner{
                height:auto;
            }
            #u0_img{
                height:40vh;
            }
            .products-section {
                padding-bottom: 5rem;
                background:transparent;
            }
            .carousel-container {
                margin: 1.5rem auto 2rem auto;
                padding: 0 1rem;
            }
            .products-grid {
                display: flex;
                flex-direction: column;
                gap: 1.5rem;
                height: auto;
            }
            .product-card {
                width: 100%;
                margin: 0 auto;
            }
            .about-title {
                font-size: 1.8rem;
            }
            .section-title {
                font-size: 1.8rem;
            }
            .carousel-track img {
                width: 90%;
                height: 14rem;
            }
            .content.scroll-reveal{
                margin-top:78rem;
            }
            .scroll-reveal{
                opacity:1;
                transform:none !important;
                transition:none !important;
            }
            .development-section{
                padding-bottom:5rem;
            }
            .footer {
                flex-direction: column;
                align-items: center;
                text-align: center;
            }
            .footer-right {
                align-items: center;
            }
            .footer-nav {
                justify-content: center;
            }
        }

        /* 平板横屏额外优化 */
        @media (min-width: 768px) and (max-width: 1024px) {
            body{
                font-size:15px;
            }
            .products-grid {
                grid-template-columns: repeat(2, 1fr);
            }
             .content.scroll-reveal{
                margin-top:65rem;
            }
            .scroll-reveal{
                opacity:1;
                transform:none !important;
                transition:none !important;
            }
            .fragment0{
                display:none;
            }
            #u0_img{
                height:80vh;
            }
            .img_logo{
                width:65%;
            }
            .name0{
                font-size:1.5rem;
            }
        }

        @media (min-width:1024px){
            .hamburger{
                display:none;
            }

        }