/*
 * 虎牌新能源官网 - 主样式
 * 传统企业风格 + 适度科技感
 */

/* ==================== 全局样式 ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #c8102e;
    --secondary-color: #1a1a1a;
    --accent-color: #0066cc;
    --text-dark: #333333;
    --text-gray: #666666;
    --text-light: #999999;
    --border-color: #dddddd;
    --bg-gray: #f5f5f5;
    --white: #ffffff;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: "Microsoft YaHei", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
    font-size: 14px;
    line-height: 1.8;
    color: var(--text-dark);
    background-color: var(--white);
}

.zj-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

img {
    max-width: 100%;
    display: block;
}

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

ul, ol {
    list-style: none;
}

/* ==================== 顶部信息栏 ==================== */
.zj-top-bar {
    background-color: var(--secondary-color);
    color: var(--white);
    font-size: 12px;
    line-height: 36px;
}

.zj-top-info {
    display: flex;
    justify-content: space-between;
}

.zj-top-info span {
    display: inline-block;
}

/* ==================== 导航栏 ==================== */
.zj-navbar {
    background-color: var(--white);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.zj-nav-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.zj-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.zj-logo-img {
    height: 50px;
    width: auto;
}

.zj-logo-text {
    display: flex;
    flex-direction: column;
}

.zj-logo-main {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary-color);
    line-height: 1.2;
}

.zj-logo-sub {
    font-size: 11px;
    color: var(--text-gray);
    letter-spacing: 1px;
}

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

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

.zj-nav-link {
    display: block;
    padding: 0 20px;
    line-height: 80px;
    font-size: 14px;
    color: var(--text-dark);
    transition: all 0.3s;
    border-bottom: 3px solid transparent;
}

.zj-nav-link:hover {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.zj-hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 10px;
}

.zj-hamburger span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: var(--text-dark);
    transition: all 0.3s;
}

/* ==================== 首屏轮播 ==================== */
.zj-banner {
    position: relative;
    height: 650px;
    overflow: hidden;
}

.zj-banner-item {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    transition: opacity 1s;
}

.zj-banner-item.zj-active {
    opacity: 1;
}

.zj-banner-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    background-color: #1a1a1a;
}

.zj-banner-bg::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.3);
    z-index: 1;
}

.zj-banner-video {
    position: absolute;
    top: 50%;
    left: 50%;
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
    transform: translate(-50%, -50%);
    object-fit: cover;
}

.zj-banner-fallback {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
}

.zj-banner-content {
    position: relative;
    z-index: 2;
    padding-top: 160px;
    color: var(--white);
}

.zj-banner-content h1 {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0,0,0,0.5);
}

.zj-banner-content p {
    font-size: 20px;
    opacity: 0.95;
}

/* ==================== 公共板块样式 ==================== */
.zj-section-header {
    text-align: center;
    margin-bottom: 50px;
}

.zj-section-title {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 10px;
}

.zj-title-line {
    width: 60px;
    height: 3px;
    background-color: var(--primary-color);
    margin: 0 auto 10px;
}

.zj-section-desc {
    font-size: 14px;
    color: var(--text-light);
    letter-spacing: 2px;
}

.zj-section-header.zj-white .zj-section-title,
.zj-section-header.zj-white .zj-section-desc {
    color: var(--white);
}

.zj-section-header.zj-white .zj-title-line {
    background-color: var(--white);
}

/* ==================== 关于我们简介 ==================== */
.zj-about-brief {
    padding: 80px 0;
    background-color: var(--white);
}

.zj-about-content {
    display: grid;
    grid-template-columns: 480px 1fr;
    gap: 60px;
    align-items: center;
}

.zj-about-video {
    position: relative;
    width: 100%;
    height: auto;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    cursor: pointer;
}

.zj-about-video video {
    width: 100%;
    height: auto;
    display: block;
}

.zj-video-play-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    cursor: pointer;
    transition: all 0.3s;
    z-index: 2;
}

.zj-video-play-btn:hover {
    transform: translate(-50%, -50%) scale(1.1);
}

.zj-about-video.zj-playing .zj-video-play-btn {
    opacity: 0;
    pointer-events: none;
}

.zj-about-text h3 {
    font-size: 24px;
    color: var(--text-dark);
    margin-bottom: 20px;
    border-left: 4px solid var(--primary-color);
    padding-left: 15px;
}

.zj-about-intro p {
    margin-bottom: 15px;
    text-indent: 2em;
    line-height: 2;
}

.zj-about-data {
    display: flex;
    gap: 40px;
    margin-top: 40px;
    padding-top: 30px;
    border-top: 1px solid var(--border-color);
}

.zj-data-item {
    text-align: center;
}

.zj-data-num {
    font-size: 40px;
    font-weight: 700;
    color: var(--primary-color);
    line-height: 1;
}

.zj-data-num::after {
    content: '+';
    font-size: 24px;
}

.zj-data-label {
    font-size: 13px;
    color: var(--text-gray);
    margin-top: 10px;
}

/* ==================== 业务领域 ==================== */
.zj-business {
    padding: 80px 0;
    background-color: var(--bg-gray);
}

.zj-business-list {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.zj-business-item {
    background-color: var(--white);
    border: 1px solid var(--border-color);
    margin-bottom: 30px;
    padding: 50px 60px;
    transition: all 0.3s;
}

.zj-business-item:hover {
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    transform: translateX(5px);
}

.zj-business-info {
    max-width: 100%;
}

.zj-business-info h3 {
    font-size: 28px;
    color: var(--text-dark);
    margin-bottom: 30px;
    border-left: 4px solid var(--primary-color);
    padding-left: 20px;
}

.zj-business-desc {
    margin-bottom: 25px;
}

.zj-business-desc p {
    margin-bottom: 15px;
    line-height: 2;
    color: var(--text-gray);
}

.zj-business-desc strong {
    color: var(--text-dark);
    font-weight: 700;
}

.zj-business-points {
    margin-top: 25px;
    padding-top: 25px;
    border-top: 1px solid var(--border-color);
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 15px 30px;
}

.zj-business-points li {
    padding: 12px 0 12px 25px;
    position: relative;
    color: var(--text-gray);
    background-color: var(--bg-gray);
    border-radius: 4px;
    padding-left: 40px;
}

.zj-business-points li::before {
    content: '✓';
    position: absolute;
    left: 15px;
    color: var(--primary-color);
    font-size: 16px;
    font-weight: 700;
    top: 12px;
}

/* ==================== 产品中心 ==================== */
.zj-products {
    padding: 0;
}

.zj-products-bg {
    background: linear-gradient(to bottom, var(--secondary-color) 0%, var(--secondary-color) 360px, var(--white) 360px, var(--white) 100%);
    padding: 80px 0;
}

.zj-products-wrapper {
    overflow: hidden;
    position: relative;
}

.zj-products-track {
    display: flex;
    gap: 20px;
    animation: zj-products-scroll 40s linear infinite;
}

.zj-products-track:hover {
    animation-play-state: paused;
}

@keyframes zj-products-scroll {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-50%);
    }
}

.zj-product-card {
    min-width: 280px;
    flex-shrink: 0;
    background-color: var(--white);
    border: 1px solid var(--border-color);
    transition: all 0.3s;
}

.zj-product-card:hover {
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    transform: translateY(-5px);
}

.zj-product-img {
    width: 100%;
    height: 180px;
    overflow: hidden;
    background-color: var(--bg-gray);
}

.zj-product-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s;
}

.zj-product-card:hover .zj-product-img img {
    transform: scale(1.05);
}

.zj-product-name {
    padding: 15px;
    font-size: 15px;
    font-weight: 700;
    color: var(--text-dark);
    text-align: center;
    border-bottom: 1px solid var(--border-color);
}

.zj-product-brief {
    padding: 12px 15px;
    font-size: 13px;
    color: var(--text-gray);
    text-align: center;
    line-height: 1.6;
}

/* ==================== 技术优势 ==================== */
.zj-technology {
    padding: 80px 0;
    background-color: var(--bg-gray);
}

.zj-tech-content {
    background-color: var(--white);
    border: 1px solid var(--border-color);
}

.zj-tech-tabs {
    display: flex;
    border-bottom: 2px solid var(--border-color);
}

.zj-tech-tab {
    flex: 1;
    text-align: center;
    padding: 18px 20px;
    font-size: 15px;
    font-weight: 700;
    color: var(--text-gray);
    cursor: pointer;
    background-color: var(--bg-gray);
    border-right: 1px solid var(--border-color);
    transition: all 0.3s;
}

.zj-tech-tab:last-child {
    border-right: none;
}

.zj-tech-tab.zj-active {
    background-color: var(--white);
    color: var(--primary-color);
    border-bottom: 2px solid var(--primary-color);
    margin-bottom: -2px;
}

.zj-tech-panel {
    display: none;
    padding: 40px;
}

.zj-tech-panel.zj-active {
    display: block;
}

.zj-tech-table {
    width: 100%;
    border-collapse: collapse;
}

.zj-tech-table th,
.zj-tech-table td {
    padding: 15px 20px;
    border: 1px solid var(--border-color);
    text-align: left;
}

.zj-tech-table th {
    background-color: var(--bg-gray);
    font-weight: 700;
    color: var(--text-dark);
    width: 180px;
}

.zj-tech-table td {
    color: var(--text-gray);
}

.zj-tech-table tr:hover {
    background-color: #fafafa;
}

/* ==================== 合作加盟 ==================== */
.zj-cooperation {
    padding: 80px 0;
    background-color: var(--white);
}

/* ==================== 资质展示 ==================== */
.zj-materials {
    padding: 80px 0;
    background-color: var(--bg-gray);
    overflow: hidden;
}

.zj-materials-wrapper {
    position: relative;
    overflow: hidden;
    margin: 0 -15px;
}

.zj-materials-track {
    display: flex;
    gap: 20px;
    animation: zj-scroll 30s linear infinite;
    will-change: transform;
}

.zj-materials-track:hover {
    animation-play-state: paused;
}

@keyframes zj-scroll {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-50%);
    }
}

.zj-material-item {
    flex-shrink: 0;
    width: 280px;
    background-color: var(--white);
    border: 1px solid var(--border-color);
    padding: 15px;
    transition: all 0.3s;
}

.zj-material-item:hover {
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    transform: translateY(-5px);
}

.zj-material-item img {
    width: 100%;
    height: auto;
    display: block;
}

/* ==================== 合作加盟 ==================== */
.zj-cooperation {
    padding: 80px 0;
    background-color: var(--white);
}

.zj-coop-intro {
    text-align: center;
    max-width: 900px;
    margin: 0 auto 50px;
    line-height: 2;
    color: var(--text-gray);
}

.zj-coop-types {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.zj-coop-card {
    border: 2px solid var(--border-color);
    padding: 40px 30px;
    text-align: center;
    transition: all 0.3s;
}

.zj-coop-card:hover {
    border-color: var(--primary-color);
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.zj-coop-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 2px solid var(--primary-color);
}

.zj-coop-content p {
    padding: 10px 0;
    color: var(--text-gray);
    border-bottom: 1px dashed var(--border-color);
}

.zj-coop-content p:last-child {
    border-bottom: none;
}

/* ==================== 联系我们 ==================== */
.zj-contact {
    padding: 80px 0;
    background-color: var(--white);
}

.zj-contact-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.zj-contact-info h3 {
    font-size: 20px;
    color: var(--text-dark);
    margin-bottom: 25px;
    border-left: 4px solid var(--primary-color);
    padding-left: 15px;
}

.zj-contact-list {
    margin-bottom: 30px;
}

.zj-contact-row {
    padding: 12px 0;
    display: flex;
    border-bottom: 1px dashed var(--border-color);
}

.zj-contact-label {
    color: var(--text-gray);
    width: 100px;
    flex-shrink: 0;
}

.zj-contact-value {
    color: var(--text-dark);
}

.zj-contact-form-wrapper h3 {
    font-size: 20px;
    color: var(--text-dark);
    margin-bottom: 25px;
    border-left: 4px solid var(--primary-color);
    padding-left: 15px;
}

.zj-contact-form {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.zj-contact-form input,
.zj-contact-form select,
.zj-contact-form textarea {
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    font-size: 14px;
    font-family: inherit;
    transition: border-color 0.3s;
}

.zj-contact-form input:focus,
.zj-contact-form select:focus,
.zj-contact-form textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

.zj-contact-form textarea {
    resize: vertical;
}

.zj-submit-btn {
    padding: 12px 40px;
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
    font-size: 15px;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.3s;
}

.zj-submit-btn:hover {
    background-color: #a00d25;
}

.zj-form-result {
    margin-top: 15px;
    padding: 12px;
    text-align: center;
    display: none;
}

.zj-form-result.zj-success {
    display: block;
    background-color: #f0f9ff;
    border: 1px solid #0066cc;
    color: #0066cc;
}

/* ==================== 页脚 ==================== */
.zj-footer {
    background-color: var(--secondary-color);
    color: rgba(255,255,255,0.7);
    padding: 50px 0 30px;
}

.zj-footer-main {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    padding-bottom: 40px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.zj-footer-col h4 {
    color: var(--white);
    font-size: 16px;
    margin-bottom: 20px;
}

.zj-footer-col ul li {
    padding: 8px 0;
}

.zj-footer-col ul li a {
    transition: color 0.3s;
}

.zj-footer-col ul li a:hover {
    color: var(--white);
}

.zj-footer-bottom {
    text-align: center;
    padding-top: 30px;
    font-size: 13px;
}

.zj-footer-bottom p {
    padding: 5px 0;
}

.zj-footer-bottom a {
    color: inherit;
    transition: color 0.3s;
}

.zj-footer-bottom a:hover {
    color: var(--white);
}

/* ==================== 返回顶部 ==================== */
.zj-back-top {
    position: fixed;
    right: 30px;
    bottom: 30px;
    width: 50px;
    height: 50px;
    background-color: var(--primary-color);
    color: var(--white);
    text-align: center;
    line-height: 50px;
    font-size: 12px;
    font-weight: 700;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s;
    z-index: 999;
}

.zj-back-top.zj-show {
    opacity: 1;
    visibility: visible;
}

.zj-back-top:hover {
    background-color: #a00d25;
}


/* 双视频无感切换 */
.zj-video-hd{
    opacity:0;
    pointer-events:none;
    transition:opacity .45s ease;
}

.zj-video-hd.zj-video-show{
    opacity:1;
}

.zj-video-lite.zj-video-hide{
    opacity:0;
    transition:opacity .45s ease;
}