/*
 * 内页样式表
 * 包含:首页/公司介绍/解决方案/案例/联系 各页面专属样式
 */

/* ==================== 通用内页大图横幅 ==================== */
.page-hero {
    height: 320px;
    background: linear-gradient(rgba(0, 0, 0, 0.55), rgba(0, 0, 0, 0.55)), url('../images/hero-bg.png') no-repeat center center/cover;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
    margin-top: 70px;
}

.page-hero h1 {
    font-size: 2.8rem;
    margin-bottom: 12px;
    animation: fadeInDown 1s ease;
}

.page-hero p {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.9);
    animation: fadeInUp 1s ease 0.3s;
    animation-fill-mode: both;
}

/* ==================== 首页 ==================== */
.home-hero {
    height: 100vh;
    background: linear-gradient(rgba(0, 0, 0, 0.6), rgba(0, 0, 0, 0.6)), url('../images/hero-bg.png') no-repeat center center/cover;
    display: flex;
    align-items: center;
    text-align: center;
    color: white;
}

.home-hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.home-hero h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    animation: fadeInDown 1s ease;
}

.home-hero p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    animation: fadeInUp 1s ease 0.3s;
    animation-fill-mode: both;
}

.home-hero-btns {
    animation: fadeInUp 1s ease 0.6s;
    animation-fill-mode: both;
}

.home-hero-btns .btn {
    margin: 0 10px;
}

/* 首页横幅上的次要按钮:深色背景图上改为白字白描边,保证可读性;
   padding 比主按钮少 2px(描边宽度),使两个按钮外框尺寸完全一致 */
.home-hero-btns .btn-secondary {
    color: #ffffff;
    border: 2px solid #ffffff;
    background-color: rgba(255, 255, 255, 0.08);
    padding: 10px 28px;
}

.home-hero-btns .btn-secondary:hover {
    background-color: #ffffff;
    color: var(--primary-color);
}

/* 首页/列表页通用 解决方案卡片网格 */
.solutions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 25px;
}

.solution-card {
    background-color: white;
    border-radius: 8px;
    padding: 30px 25px;
    text-align: center;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    color: var(--text-color);
    display: block;
}

.solution-card:hover {
    transform: translateY(-10px);
    color: var(--text-color);
}

.solution-card-icon {
    width: 70px;
    height: 70px;
    background-color: var(--light-bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
}

.solution-card-icon i {
    font-size: 30px;
    color: var(--primary-color);
}

.solution-card-icon img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: 50%;
}

.solution-card h3 {
    margin-bottom: 12px;
    color: var(--primary-color);
    font-size: 1.15rem;
}

.solution-card p {
    color: var(--light-text);
    font-size: 0.95rem;
}

/* 内页通用 底部合作咨询CTA (cases/solutions/solution-N 都用) */
.contact-cta {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    padding: 60px 0;
    text-align: center;
}

.contact-cta h2 {
    font-size: 2rem;
    margin-bottom: 15px;
}

.contact-cta p {
    margin-bottom: 25px;
    opacity: 0.95;
}

.contact-cta .btn-primary {
    background-color: white;
    color: var(--primary-color);
}

.contact-cta .btn-primary:hover {
    background-color: var(--accent-color);
    color: white;
}

/* ==================== 公司介绍页 ==================== */
.about-content {
    display: flex;
    align-items: center;
    gap: 50px;
}

.about-text {
    flex: 1;
}

.about-image {
    flex: 0 0 40%;
    align-self: flex-start;
    margin-top: 66px; /* 与 h3 标题高度(约46px)+下间距(20px)对齐,使图片上沿与正文首行齐平 */
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--box-shadow);
}

.about-image img {
    width: 100%;
    height: auto;
    object-fit: contain;
    display: block;
}

.about-text h3 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: var(--primary-color);
}

.about-text p {
    margin-bottom: 20px;
}

.company-values {
    display: flex;
    justify-content: space-between;
    margin-top: 30px;
}

.value-item {
    text-align: center;
    padding: 20px;
    border-radius: 8px;
    background-color: var(--light-bg);
    transition: var(--transition);
    flex: 1;
    margin: 0 10px;
}

.value-item:hover {
    transform: translateY(-10px);
    box-shadow: var(--box-shadow);
}

.value-item i {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.value-item h4 {
    margin-bottom: 10px;
    color: var(--primary-color);
}

/* 公司历程时间线 */
.timeline {
    position: relative;
    padding: 20px 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background-color: var(--border-color);
    transform: translateX(-50%);
}

.timeline-item {
    position: relative;
    width: 50%;
    padding: 20px 40px;
    box-sizing: border-box;
}

.timeline-item:nth-child(odd) {
    left: 0;
    text-align: right;
}

.timeline-item:nth-child(even) {
    left: 50%;
    text-align: left;
}

.timeline-item::after {
    content: '';
    position: absolute;
    top: 28px;
    width: 14px;
    height: 14px;
    background-color: var(--primary-color);
    border-radius: 50%;
    border: 3px solid white;
    box-shadow: 0 0 0 2px var(--primary-color);
}

.timeline-item:nth-child(odd)::after {
    right: -7px;
}

.timeline-item:nth-child(even)::after {
    left: -7px;
}

.timeline-year {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.timeline-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 6px;
}

.timeline-desc {
    color: var(--light-text);
    font-size: 0.95rem;
}

/* ==================== 解决方案页 ==================== */
.solution-tabs {
    margin-top: 30px;
}

.tab-nav {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 0;
    margin-bottom: 30px;
    border-bottom: 1px solid var(--border-color);
}

.tab-btn {
    padding: 12px 18px;
    background: none;
    border: none;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--light-text);
    cursor: pointer;
    position: relative;
    transition: var(--transition);
    white-space: nowrap;
}

.tab-btn::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 0;
    height: 3px;
    background-color: var(--primary-color);
    transition: var(--transition);
}

.tab-btn.active {
    color: var(--primary-color);
}

.tab-btn.active::after {
    width: 100%;
}

.tab-pane {
    display: none;
}

.tab-pane.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

.solution-detail {
    padding: 50px 0 0;
}

.solution-info {
    display: flex;
    align-items: center;
    gap: 50px;
}

.solution-image {
    flex: 1;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--box-shadow);
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 350px;
}

.solution-image i {
    font-size: 80px;
    color: white;
    opacity: 0.9;
}

/* 图片模式 */
.solution-image.solution-has-image {
    background: #ffffff;
    padding: 20px;
}

.solution-image.solution-has-image img {
    width: 100%;
    height: 100%;
    max-height: 400px;
    object-fit: contain;
}

.solution-details {
    flex: 1;
}

.solution-details h3 {
    font-size: 1.8rem;
    margin-bottom: 15px;
    color: var(--primary-color);
}

.solution-details p {
    margin-bottom: 20px;
}

.feature-list {
    margin-bottom: 30px;
}

.feature-list li {
    margin-bottom: 10px;
    display: flex;
    align-items: center;
}

.feature-list i {
    color: var(--success-color);
    margin-right: 10px;
}

/* ==================== 案例列表页 ==================== */
.cases-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.case-card {
    background-color: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    color: var(--text-color);
    display: block;
}

.case-card:hover {
    transform: translateY(-5px);
    color: var(--text-color);
}

.case-card-image {
    height: 240px;
    overflow: hidden;
    background-color: #ffffff;
}

.case-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover; /* 案例图为工程实景照片,裁切填满卡片 */
    transition: var(--transition);
}

.case-card:hover .case-card-image img {
    transform: scale(1.05);
}

.case-card-content {
    padding: 25px;
}

.case-card-content h3 {
    font-size: 1.4rem;
    margin-bottom: 8px;
    color: var(--primary-color);
}

.case-category {
    color: var(--light-text);
    font-style: italic;
    margin-bottom: 12px;
    font-size: 0.9rem;
}

.case-card-content p {
    color: var(--text-color);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 15px;
}

.read-more {
    display: inline-flex;
    align-items: center;
    font-weight: 600;
    color: var(--primary-color);
}

.read-more i {
    margin-left: 5px;
    transition: var(--transition);
}

.read-more:hover i {
    transform: translateX(5px);
}

/* ==================== 联系我们页 ==================== */
.contact-content {
    display: flex;
    gap: 50px;
}

.contact-info {
    flex: 1;
}

.contact-form {
    flex: 1;
}

.info-item {
    margin-bottom: 30px;
}

.info-item i {
    font-size: 2rem;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.info-item h3 {
    margin-bottom: 10px;
    color: var(--primary-color);
}

.social-links {
    margin-top: 30px;
}

.social-links a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--light-bg);
    color: var(--primary-color);
    margin-right: 10px;
    transition: var(--transition);
}

.social-links a:hover {
    background-color: var(--primary-color);
    color: white;
}

.form-group {
    margin-bottom: 20px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    transition: var(--transition);
    font-family: inherit;
    font-size: 1rem;
}

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

.form-group textarea {
    height: 150px;
    resize: vertical;
}

.form-group input.error,
.form-group select.error,
.form-group textarea.error {
    border-color: var(--error-color);
}

/* ==================== 解决方案二级子菜单条(内页顶部横向) ==================== */
.solution-submenu {
    background-color: var(--light-bg);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 70px;
    z-index: 50;
}

.solution-submenu .container {
    display: flex;
    justify-content: flex-start;
    flex-wrap: nowrap;
    align-items: flex-start;
    gap: 10px 0;
    padding-top: 10px;
    padding-bottom: 10px;
}

.submenu-group {
    display: flex;
    align-items: center;
    gap: 4px 8px;
    flex-wrap: wrap;
    flex: 0 0 33.3333%;
    width: 33.3333%;
    min-width: 0;
    padding: 0 12px;
    border-right: 1px solid rgba(0,0,0,0.08);
}

.submenu-group:last-child {
    border-right: none;
}

.solution-submenu .solution-group-name {
    background-color: var(--primary-color);
    color: #fff;
    font-size: 0.85rem;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: 10px;
    white-space: nowrap;
    margin: 0 3px;
}

.solution-submenu a {
    display: inline-block;
    padding: 6px 10px;
    font-size: 0.78rem;
    font-weight: 500;
    color: var(--light-text);
    border-bottom: 2px solid transparent;
    white-space: nowrap;
    transition: var(--transition);
}

.solution-submenu a:hover {
    color: var(--primary-color);
    border-bottom-color: var(--secondary-color);
}

.solution-submenu a.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
    font-weight: 600;
}

/* ==================== 解决方案详情页:相邻跳转+返回列表 ==================== */
.solution-detail-nav {
    margin-bottom: 40px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--border-color);
}

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

.solution-detail-nav .back-list {
    color: var(--light-text);
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.solution-detail-nav .back-list:hover {
    color: var(--primary-color);
}

.solution-neighbor {
    display: flex;
    gap: 20px;
}

.solution-neighbor a {
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: 5px;
    padding: 6px 14px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--light-text);
}

.solution-neighbor a:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

/* ==================== 首页新闻版块 ==================== */
.news-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.news-item {
    background-color: white;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--box-shadow);
    transition: var(--transition);
    color: var(--text-color);
    display: block;
}

.news-item:hover {
    transform: translateY(-5px);
    color: var(--text-color);
}

/* 首页新闻卡片:非链接展示,取消悬停上浮 */
.news-list--static .news-item:hover {
    transform: none;
}

.news-item-content {
    padding: 25px;
}

.news-date {
    display: inline-block;
    font-size: 0.85rem;
    color: var(--primary-color);
    background-color: var(--light-bg);
    padding: 4px 10px;
    border-radius: 3px;
    margin-bottom: 15px;
    font-weight: 500;
}

.news-item h3 {
    font-size: 1.1rem;
    margin-bottom: 12px;
    color: var(--text-color);
    line-height: 1.5;
    /* 标题两行省略 */
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.news-item:hover h3 {
    color: var(--primary-color);
}

.news-desc {
    color: var(--light-text);
    font-size: 0.9rem;
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* ==================== 解决方案列表页:分组展示 ==================== */
.solution-group {
    margin-bottom: 60px;
}

.solution-group-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 2px solid var(--primary-color);
}

.solution-group-header i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

.solution-group-header h3 {
    font-size: 1.4rem;
    color: var(--text-color);
}

.solution-group-header p {
    margin-left: auto;
    color: var(--light-text);
    font-size: 0.9rem;
}

/* 二级子菜单:分组分隔 */
.solution-submenu .group-separator {
    width: 1px;
    height: 20px;
    background-color: var(--border-color);
    margin: 0 6px;
    align-self: center;
    flex-shrink: 0;
}

/* ==================== 响应式 ==================== */
@media (max-width: 992px) {
    .about-content,
    .solution-info,
    .contact-content {
        flex-direction: column;
    }

    .about-image,
    .solution-image {
        margin-top: 30px;
    }

    .company-values {
        flex-wrap: wrap;
    }

    .value-item {
        flex: 0 0 calc(50% - 20px);
        margin-bottom: 30px;
    }

    .cases-grid,
    .news-list {
        grid-template-columns: 1fr;
    }

    .solution-detail-nav {
        flex-direction: column;
        gap: 15px;
        align-items: flex-start;
    }

    /* 时间线单边布局 */
    .timeline::before {
        left: 20px;
    }

    .timeline-item {
        width: 100%;
        left: 0 !important;
        text-align: left !important;
        padding-left: 50px;
        padding-right: 20px;
    }

    .timeline-item::after {
        left: 13px !important;
        right: auto !important;
    }
}

@media (max-width: 576px) {
    .home-hero h1 {
        font-size: 2rem;
    }

    .home-hero p {
        font-size: 1rem;
    }

    .home-hero-btns .btn {
        display: block;
        width: 100%;
        margin: 10px 0;
    }

    .page-hero h1 {
        font-size: 2rem;
    }

    .solutions-grid {
        grid-template-columns: 1fr;
    }

    .value-item {
        flex: 0 0 100%;
    }
}

/* 子菜单:小屏下三个分组改为纵向堆叠 */
@media (max-width: 768px) {
    .solution-detail {
        padding-top: 30px;
    }

    .solution-submenu .container {
        flex-wrap: wrap;
        gap: 0;
    }

    .submenu-group {
        flex: 0 0 100%;
        width: 100%;
        padding: 8px 0;
        border-right: none;
        border-bottom: 1px solid rgba(0,0,0,0.08);
    }

    .submenu-group:last-child {
        border-bottom: none;
    }
}