/*
 * 虎牌新能源官网 - 响应式样式
 */

/* ==================== 平板设备 (768px - 1024px) ==================== */
@media screen and (max-width: 1024px) {
    .zj-container {
        padding: 0 20px;
    }

    .zj-banner-content h1 {
        font-size: 36px;
    }

    .zj-banner-content p {
        font-size: 18px;
    }

    .zj-about-content {
        grid-template-columns: 400px 1fr;
        gap: 40px;
    }

    .zj-business-item {
        grid-template-columns: 380px 1fr;
        gap: 30px;
    }

    .zj-business-item.zj-reverse {
        grid-template-columns: 1fr 380px;
    }

    .zj-products-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .zj-coop-types {
        grid-template-columns: repeat(2, 1fr);
    }

    .zj-contact-wrapper {
        gap: 40px;
    }
}

/* ==================== 移动设备 (小于 768px) ==================== */
@media screen and (max-width: 767px) {
    /* 顶部信息栏 */
    .zj-top-info {
        flex-direction: column;
        text-align: center;
        line-height: 1.8;
        padding: 5px 0;
    }

    /* 导航栏 */
    .zj-nav-wrapper {
        height: 60px;
    }

    .zj-logo-img {
        height: 40px;
    }

    .zj-logo-main {
        font-size: 18px;
    }

    .zj-logo-sub {
        font-size: 10px;
    }

    .zj-nav-menu {
        position: fixed;
        top: 60px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 60px);
        background-color: var(--white);
        flex-direction: column;
        padding: 20px 0;
        box-shadow: 0 4px 8px rgba(0,0,0,0.1);
        transition: left 0.3s;
        z-index: 999;
    }

    .zj-nav-menu.zj-active {
        left: 0;
    }

    .zj-nav-link {
        line-height: 50px;
        padding: 0 20px;
        border-bottom: 1px solid var(--border-color);
    }

    .zj-hamburger {
        display: flex;
    }

    .zj-hamburger.zj-active span:nth-child(1) {
        transform: rotate(45deg) translate(7px, 7px);
    }

    .zj-hamburger.zj-active span:nth-child(2) {
        opacity: 0;
    }

    .zj-hamburger.zj-active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -7px);
    }

    /* 首屏 */
    .zj-banner {
        height: 400px;
    }

    .zj-banner-content {
        padding-top: 120px;
    }

    .zj-banner-content h1 {
        font-size: 28px;
    }

    .zj-banner-content p {
        font-size: 16px;
    }

    /* 章节标题 */
    .zj-section-title {
        font-size: 26px;
    }

    .zj-section-header {
        margin-bottom: 40px;
    }

    /* 关于我们 */
    .zj-about-brief {
        padding: 50px 0;
    }

    .zj-about-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .zj-about-text h3 {
        font-size: 20px;
    }

    .zj-about-intro p {
        text-indent: 0;
    }

    .zj-about-data {
        flex-direction: column;
        gap: 20px;
    }

    .zj-data-num {
        font-size: 32px;
    }

    /* 业务领域 */
    .zj-business {
        padding: 50px 0;
    }

    .zj-business-list {
        gap: 30px;
    }

    .zj-business-item {
        grid-template-columns: 1fr;
    }

    .zj-business-item.zj-reverse {
        grid-template-columns: 1fr;
    }

    .zj-business-item.zj-reverse .zj-business-img {
        order: 1;
    }

    .zj-business-img {
        height: 250px;
    }

    .zj-business-info {
        padding: 30px 20px;
    }

    .zj-business-item.zj-reverse .zj-business-info {
        padding: 30px 20px;
    }

    .zj-business-info h3 {
        font-size: 20px;
    }

    /* 产品中心 */
    .zj-products-bg {
        background: var(--secondary-color);
        padding: 50px 0;
    }

    .zj-products-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 15px;
    }

    .zj-product-img {
        height: 150px;
    }

    .zj-product-name {
        font-size: 14px;
        padding: 12px 10px;
    }

    .zj-product-brief {
        font-size: 12px;
        padding: 10px;
    }

    /* 技术优势 */
    .zj-technology {
        padding: 50px 0;
    }

    .zj-tech-tabs {
        flex-direction: column;
    }

    .zj-tech-tab {
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }

    .zj-tech-panel {
        padding: 20px 15px;
    }

    .zj-tech-table {
        font-size: 13px;
    }

    .zj-tech-table th,
    .zj-tech-table td {
        padding: 10px;
        display: block;
        width: 100%;
        border: none;
        border-bottom: 1px solid var(--border-color);
    }

    .zj-tech-table th {
        background-color: transparent;
        font-weight: 700;
        padding-bottom: 5px;
    }

    .zj-tech-table td {
        padding-top: 5px;
        padding-bottom: 15px;
    }

    /* 合作加盟 */
    .zj-cooperation {
        padding: 50px 0;
    }

    .zj-coop-types {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .zj-coop-card {
        padding: 30px 20px;
    }

    /* 新闻资讯 */
    .zj-news {
        padding: 50px 0;
    }

    .zj-news-item {
        flex-direction: column;
        padding: 20px;
        gap: 15px;
    }

    .zj-news-date {
        display: flex;
        align-items: center;
        gap: 10px;
    }

    .zj-news-day {
        font-size: 28px;
    }

    .zj-news-content h3 {
        font-size: 16px;
    }

    .zj-news-content p {
        font-size: 13px;
    }

    /* 联系我们 */
    .zj-contact {
        padding: 50px 0;
    }

    .zj-contact-wrapper {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .zj-contact-info h3,
    .zj-contact-form-wrapper h3 {
        font-size: 18px;
    }

    .zj-contact-row {
        flex-direction: column;
        gap: 5px;
    }

    .zj-contact-label {
        width: auto;
    }

    /* 页脚 */
    .zj-footer {
        padding: 40px 0 20px;
    }

    .zj-footer-main {
        grid-template-columns: repeat(2, 1fr);
        gap: 30px;
        padding-bottom: 30px;
    }

    .zj-footer-col h4 {
        font-size: 15px;
    }

    .zj-footer-col ul li {
        font-size: 13px;
    }

    .zj-footer-bottom {
        font-size: 12px;
    }

    /* 返回顶部 */
    .zj-back-top {
        right: 20px;
        bottom: 20px;
        width: 45px;
        height: 45px;
        line-height: 45px;
    }
}

/* ==================== 超小设备 (小于 480px) ==================== */
@media screen and (max-width: 479px) {
    .zj-banner {
        height: 350px;
    }

    .zj-banner-content h1 {
        font-size: 24px;
    }

    .zj-banner-content p {
        font-size: 14px;
    }

    .zj-section-title {
        font-size: 22px;
    }

    .zj-products-grid {
        grid-template-columns: 1fr;
    }

    .zj-footer-main {
        grid-template-columns: 1fr;
        gap: 25px;
    }
}