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

        body {
            font-family: 'Helvetica Neue', 'Arial', sans-serif;
            line-height: 1.7;
            color: #2c2c2c;
            background: #fff;
            margin: 0;
            padding: 0;
            font-size: 16px;
        }

        /* 顶部联系栏样式 */
        .top-bar {
            background: #f8f9fa;
            padding: 1rem 0;
        }

        .top-bar-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 0 3rem;
            max-width: 1600px;
            margin: 0 auto;
        }

        .contact-info {
            display: flex;
            gap: 3rem;
        }

        .contact-item {
            color: #6c757d;
            text-decoration: none;
            font-size: 0.95rem;
            font-weight: 400;
            letter-spacing: 0.3px;
        }

        .contact-item:hover {
            color: #245a42;
        }

        .social-links {
            display: flex;
            gap: 1.5rem;
        }

        .social-link {
            width: 40px;
            height: 40px;
            background: #245a42;
            color: #fff;
            display: flex;
            align-items: center;
            justify-content: center;
            text-decoration: none;
            border-radius: 2px;
            transition: background 0.3s ease;
        }

        .social-link:hover {
            background: #57842b;
        }

        /* 导航栏样式 */
        .navbar {
            background: #fff;
            padding: 0.8rem 0;
            box-shadow: 0 1px 3px rgba(0,0,0,0.1);
        }

        .nav-container {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 0 3rem;
            max-width: 1600px;
            margin: 0 auto;
        }

        .logo img {
            height: 70px;
        }

        .nav-menu {
            display: flex;
            list-style: none;
            margin: 0;
            padding: 0;
            gap: 2.5rem;
            z-index: 100;
        }
        .nav-link {
            text-decoration: none;
            color: #245a42;
            border-radius: 8px;
            padding: 1rem 1.2rem;
            display: block;
            font-weight: 600;
            font-size: 1rem;
            letter-spacing: 0.5px;
            text-transform: uppercase;
        }


        .nav-link:hover {
            color: #18402e;
            background: linear-gradient(90deg,#d0eaff 60%,#eaf6ff 100%);
            box-shadow: 0 4px 16px #245a4244;
        }

        /* 移动端菜单按钮 */
        .menu-toggle {
            display: none;
            flex-direction: column;
            cursor: pointer;
            padding: 0.5rem;
        }

        .menu-toggle span {
            width: 25px;
            height: 3px;
            background: #245a42;
            margin: 3px 0;
        }
@media screen and (min-width: 768px) and (max-width: 1035px){
    .nav-menu{    gap: 0rem;}
    
}
        /* 移动端响应式 */
        @media (max-width: 768px) {
            .top-bar-container {
                justify-content: center;
                padding: 1rem 1rem;
            }

            .nav-container {
                padding: 0 1.5rem;
            }

            .contact-info {
                gap: 1.5rem;
            }

            /* 隐藏移动端社媒按钮 */
            .social-links {
                display: none;
            }

            .menu-toggle {
                display: flex;
            }

            .nav-menu {
                position: absolute;
                top: 20%;
                left: 0;
                width: 100vw;
                min-width: 320px;
                background: #fff;
                flex-direction: column;
                display: none;
                padding: 0;
                box-shadow: 0 3px 10px rgba(0,0,0,0.1);
                z-index: 9999;
            }

            .nav-menu.active {
                display: flex;
                gap: 0;
            }

            .nav-link {
                padding: 1.5rem;
                border-bottom: 1px solid #f0f0f0;
                font-size: 0.95rem;
            }

            .hero-banner {
                width: 100%;
                height: auto;
            }
        }
		/* 二级菜单样式 */
        .nav-dropdown {
            position: relative;
        }
        .nav-link-dropdown {
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 6px;
        }
        .dropdown-menu {
            display: none;
            position: absolute;
            top: 100%;
            left: 0;
            min-width: 360px;
            background: #fff;
            box-shadow: 0 4px 16px #245a4244;
            border-radius: 8px;
            z-index: 1000;
            flex-direction: column;
            padding: 8px 0;
        }
        .dropdown-menu li{
            list-style-type: none;
        }
        .dropdown-link {
            display: block;
            padding: 0.7rem 1.2rem;
            color: #245a42;
            text-decoration: none;
            font-size: 0.98rem;
            border-radius: 6px;
            transition: background 0.2s, color 0.2s;
        }
        .dropdown-link:hover {
            background: #eaf6ff;
            color: #18402e;
        }
        /* 桌面端悬停显示 */
        .nav-dropdown:hover .dropdown-menu {
            display: flex;
        }

        @media (max-width: 768px) {
            /* 移动端一级菜单项样式优化 */
            .nav-link-dropdown {
                position: relative;
                background: #f8f9fa;
                border-left: 4px solid #245a42;
            }

            .nav-link-dropdown:hover {
                background: linear-gradient(90deg,#d0eaff 60%,#eaf6ff 100%);
            }

            /* 二级菜单展开/收起图标动画 */
            .nav-link-dropdown i {
                margin-left: auto;
                transition: transform 0.3s ease;
                font-size: 0.9rem;
                color: #245a42;
            }

            .nav-dropdown.active .nav-link-dropdown i {
                transform: rotate(180deg);
            }

            /* 二级菜单容器样式 */
            .nav-dropdown .dropdown-menu {
                position: relative;
                width: 100%;
                left: 0;
                min-width: 0;
                box-shadow: inset 0 2px 4px rgba(36, 90, 66, 0.1);
                border-radius: 0;
                background: #f1f3f4;
                padding: 0;
                z-index: 10001;
                border-top: 1px solid #e0e0e0;
                max-height: 0;
                overflow: hidden;
                transition: max-height 0.3s ease, padding 0.3s ease;
            }

            .nav-dropdown.active .dropdown-menu {
                max-height: 300px;
                padding: 8px 0;
            }

            /* 二级菜单项样式 */
            .nav-dropdown .dropdown-link {
                padding: 12px 24px 12px 40px;
                font-size: 0.9rem;
                border-bottom: 1px solid #e8e9ea;
                background: #f1f3f4;
                text-align: left;
                color: #555;
                position: relative;
                transition: all 0.2s ease;
            }

            .nav-dropdown .dropdown-link:before {
                content: "•";
                position: absolute;
                left: 24px;
                color: #245a42;
                font-weight: bold;
            }

            .nav-dropdown .dropdown-link:hover {
                background: #e8f4f8;
                color: #245a42;
                padding-left: 44px;
            }

            .nav-dropdown .dropdown-link:last-child {
                border-bottom: none;
            }

            /* 移动端显示/隐藏控制 */
            .nav-dropdown .dropdown-menu {
                display: block !important;
            }

            /* 防止菜单遮挡内容 */
            .nav-menu {
                overflow: visible;
            }
        }
		/* footer strat */
.b2b-footer {
    width: 100%;
    background: #245a42;
    color: #fff;
    padding: 38px 0 28px 0;
    font-size: 1rem;
    letter-spacing: 0.5px;
}
.b2b-footer-inner {
    max-width: 1600px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 48px;
    flex-wrap: wrap;
}
.b2b-footer-left {
    display: flex;
    align-items: center;
    gap: 24px;
}
.b2b-footer-logo {
  height: 68px;
  width: auto;
  max-width: 100%;
  object-fit: contain;
  display: block;
  border-radius: 12px;
  background: #fff;
  box-shadow: 0 2px 8px #245a4222;
}.b2b-footer-info {
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-width: 320px;
}
.b2b-footer-title {
    font-size: 1.18rem;
    font-weight: 600;
    margin-bottom: 2px;
}
.b2b-footer-desc {
    font-size: 0.98rem;
    opacity: 0.92;
    overflow-wrap: anywhere; 
    word-break: break-word; line-height: 1.75; 
}
.b2b-footer-right {
    display: flex;
    flex-direction: column;
    gap: 18px;
    min-width: 260px;
    align-items: flex-end;
    text-align: right;
}
.b2b-footer-contact {
    display: flex;
    flex-direction: column;
    gap: 7px;
    font-size: 1rem;
    align-items: flex-end;
}
.b2b-footer-contact i {
    margin-right: 7px;
    color: #eaf6ff;
}
.b2b-footer-contact a {
    color: #eaf6ff;
    text-decoration: none;
    transition: color 0.2s;
}
.b2b-footer-contact a:hover {
    color: #d0eaff;
    text-decoration: underline;
}
.b2b-footer-links {
    display: flex;
    gap: 0px;
    flex-wrap: wrap;
    flex-direction: column;
}
.b2b-footer-link {
    color: #eaf6ff;
    text-decoration: none;
    font-size: 1rem;
    font-weight: 500;
    padding: 2px 0;
    transition: color 0.2s;
}
.b2b-footer-link:hover {
    color: #d0eaff;
    text-decoration: none;
}
@media (max-width: 900px) {
    .b2b-footer-inner {
        flex-direction: column;
        gap: 24px;
        align-items: flex-start;
        padding: 0 4vw;
    }
    .b2b-footer-right {
        align-items: flex-start;
    }
    .b2b-footer-contact {
        align-items: flex-start;
    }
    .b2b-footer-logo {
        width: 54px;
        height: 54px;
    }
}
/* ==================== 右侧悬浮按钮样式 ==================== */
.floating-buttons {
            position: fixed;
            right: 20px;
            top: 50%;
            transform: translateY(-50%);
            z-index: 1000;
            display: flex;
            flex-direction: column;
            gap: 15px;
        }

        .floating-btn {
            width: 50px;
            height: 50px;
            border-radius: 50%;
            display: flex;
            align-items: center;
            justify-content: center;
            text-decoration: none;
            color: #fff;
            font-size: 24px;
            box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
            transition: all 0.3s ease;
            position: relative;
            overflow: hidden;
        }

        .floating-btn::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            bottom: 0;
            border-radius: 50%;
            background: inherit;
            transform: scale(0);
            transition: transform 0.3s ease;
        }

        .floating-btn:hover::before {
            transform: scale(1.1);
        }

        .floating-btn i {
            position: relative;
            z-index: 2;
            transition: transform 0.3s ease;
        }

        .floating-btn:hover i {
            transform: scale(1.1);
        }

        .floating-btn:hover {
            transform: translateY(-3px);
            box-shadow: 0 6px 25px rgba(0, 0, 0, 0.2);
        }

        /* 邮箱按钮 */
        .floating-btn.email {
            background: linear-gradient(135deg, #ea4335 0%, #d33b2c 100%);
        }

        .floating-btn.email:hover {
            background: linear-gradient(135deg, #d33b2c 0%, #b52d20 100%);
        }

        /* WhatsApp按钮 */
        .floating-btn.whatsapp {
            background: linear-gradient(135deg, #25d366 0%, #20b954 100%);
        }

        .floating-btn.whatsapp:hover {
            background: linear-gradient(135deg, #20b954 0%, #1a9943 100%);
        }

        /* 按钮标签提示 */
        .floating-btn .btn-label {
            position: absolute;
            right: 70px;
            background: rgba(0, 0, 0, 0.8);
            color: #fff;
            padding: 8px 12px;
            border-radius: 6px;
            font-size: 14px;
            white-space: nowrap;
            opacity: 0;
            visibility: hidden;
            transform: translateX(10px);
            transition: all 0.3s ease;
            pointer-events: none;
        }

        .floating-btn .btn-label::after {
            content: '';
            position: absolute;
            left: 100%;
            top: 50%;
            transform: translateY(-50%);
            border: 6px solid transparent;
            border-left-color: rgba(0, 0, 0, 0.8);
        }

        .floating-btn:hover .btn-label {
            opacity: 1;
            visibility: visible;
            transform: translateX(0);
        }

        /* 移动端适配 */
        @media (max-width: 768px) {
            .floating-buttons {
                right: 15px;
                bottom: 20px;
                top: auto;
                transform: none;
                flex-direction: row;
                gap: 12px;
            }

            .floating-btn {
                width: 50px;
                height: 50px;
                font-size: 20px;
            }

            .floating-btn .btn-label {
                display: none;
            }
        }

        @media (max-width: 480px) {
            .floating-buttons {
                right: 10px;
                bottom: 15px;
                gap: 10px;
            }

            .floating-btn {
                width: 45px;
                height: 45px;
                font-size: 22px;
            }
        }