/* ============================================
   江苏博厚新材料科技有限公司 - 前台样式
   设计理念：现代企业风格 + 科技环保
   主色调：深蓝#1A2332 + 绿色#2E7D32
   ============================================ */

/* Tailwind CSS CDN */
@import url('https://cdn.jsdelivr.net/npm/tailwindcss@2.2.19/dist/tailwind.min.css');

/* CSS变量 */
:root {
    --primary: #2E7D32;
    --primary-dark: #1B5E20;
    --primary-light: #E8F5E9;
    --primary-gradient: linear-gradient(135deg, #2E7D32, #43A047);
    --dark: #1A2332;
    --dark-light: #2C3E50;
    --gray-bg: #F5F7FA;
    --gray-border: #E0E0E0;
    --text-dark: #2C3E50;
    --text-gray: #7F8C8D;
    --text-white: #FFFFFF;
    --success: #27AE60;
    --warning: #F39C12;
    --danger: #E74C3C;
    --info: #3498DB;
    --shadow-sm: 0 2px 8px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.12);
    --shadow-lg: 0 8px 32px rgba(0,0,0,0.16);
    --radius: 8px;
    --radius-lg: 12px;
    --transition: all 0.3s ease;
}

/* 基础重置 */
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: 'PingFang SC', 'Microsoft YaHei', 'Helvetica Neue', Arial, sans-serif;
    font-size: 15px;
    color: var(--text-dark);
    line-height: 1.6;
    background: #fff;
}
a { text-decoration: none; color: inherit; transition: var(--transition); }
ul, ol { list-style: none; }
img { max-width: 100%; height: auto; display: block; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* ========== 顶部导航栏 ========== */
.header {
    position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
    background: #fff; box-shadow: var(--shadow-sm);
    transition: var(--transition);
}
.header.scrolled { box-shadow: var(--shadow-md); }
.header-inner {
    display: flex; align-items: center; justify-content: space-between;
    max-width: 1200px; margin: 0 auto; padding: 0 20px; height: 70px;
}
.header-logo { height: 45px; }
.header-logo img { height: 100%; }
.header-nav { display: flex; align-items: center; gap: 5px; }
.header-nav a {
    display: block; padding: 8px 18px; font-size: 15px; font-weight: 500;
    color: var(--text-dark); border-radius: var(--radius); transition: var(--transition);
    white-space: nowrap;
}
.header-nav a:hover, .header-nav a.active {
    color: var(--primary); background: var(--primary-light);
}
.header-actions { display: flex; align-items: center; gap: 10px; }
.lang-switch {
    padding: 6px 16px; border: 2px solid var(--primary); border-radius: 20px;
    color: var(--primary); font-size: 13px; font-weight: 600; cursor: pointer;
    background: transparent; transition: var(--transition);
}
.lang-switch:hover { background: var(--primary); color: #fff; }
.mobile-menu-btn { display: none; font-size: 24px; cursor: pointer; color: var(--dark); }

/* ========== Banner轮播 ========== */
.banner-section { margin-top: 70px; position: relative; }
.swiper-container { width: 100%; height: 600px; overflow: hidden; }
.swiper-slide {
    position: relative; display: flex; align-items: center; justify-content: center;
}
.swiper-slide img {
    position: absolute; top: 0; left: 0; width: 100%; height: 100%;
    object-fit: cover;
}
.swiper-slide .overlay {
    position: absolute; inset: 0;
    background: linear-gradient(to right, rgba(26,35,50,0.7), rgba(26,35,50,0.3));
}
.swiper-slide .slide-content {
    position: relative; z-index: 2; text-align: center; color: #fff; max-width: 800px; padding: 0 20px;
}
.swiper-slide .slide-content h2 {
    font-size: 48px; font-weight: 700; margin-bottom: 16px; text-shadow: 0 2px 8px rgba(0,0,0,0.3);
}
.swiper-slide .slide-content p {
    font-size: 20px; opacity: 0.9; margin-bottom: 24px;
}
.swiper-slide .slide-content .btn-slide {
    display: inline-block; padding: 12px 36px; background: var(--primary);
    color: #fff; border-radius: 30px; font-size: 16px; font-weight: 600;
    transition: var(--transition);
}
.swiper-slide .slide-content .btn-slide:hover {
    background: var(--primary-dark); transform: translateY(-2px); box-shadow: var(--shadow-md);
}
.swiper-pagination-bullet { background: #fff; opacity: 0.7; }
.swiper-pagination-bullet-active { background: var(--primary); opacity: 1; }
.swiper-button-next, .swiper-button-prev { color: #fff; }

/* ========== 通用区块 ========== */
.section { padding: 80px 0; }
.section-gray { background: var(--gray-bg); }
.section-title {
    text-align: center; margin-bottom: 50px;
}
.section-title h2 {
    font-size: 32px; font-weight: 700; color: var(--dark);
    position: relative; display: inline-block; padding-bottom: 15px;
}
.section-title h2::after {
    content: ''; position: absolute; bottom: 0; left: 50%; transform: translateX(-50%);
    width: 60px; height: 3px; background: var(--primary-gradient); border-radius: 2px;
}
.section-title p { color: var(--text-gray); margin-top: 12px; font-size: 16px; }

/* ========== 核心业务 ========== */
.business-grid {
    display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px;
}
.business-card {
    background: #fff; border-radius: var(--radius-lg); padding: 35px 25px;
    text-align: center; box-shadow: var(--shadow-sm); transition: var(--transition);
    cursor: pointer; border: 1px solid var(--gray-border);
}
.business-card:hover {
    transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: var(--primary);
}
.business-icon {
    width: 70px; height: 70px; margin: 0 auto 20px;
    background: var(--primary-gradient); border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    font-size: 30px; color: #fff;
}
.business-card h3 { font-size: 20px; font-weight: 600; margin-bottom: 10px; color: var(--dark); }
.business-card p { color: var(--text-gray); font-size: 14px; line-height: 1.7; }

/* ========== 最新动态 ========== */
.news-section-inner { display: flex; gap: 40px; }
.news-main {
    flex: 0 0 50%; position: relative; border-radius: var(--radius-lg); overflow: hidden;
    height: 350px;
}
.news-main img { width: 100%; height: 100%; object-fit: cover; }
.news-main .news-main-overlay {
    position: absolute; bottom: 0; left: 0; right: 0;
    padding: 30px; background: linear-gradient(transparent, rgba(0,0,0,0.8));
    color: #fff;
}
.news-main .news-main-overlay h3 { font-size: 22px; margin-bottom: 8px; }
.news-list { flex: 1; display: flex; flex-direction: column; gap: 15px; }
.news-item {
    display: flex; align-items: center; gap: 15px; padding: 15px;
    background: #fff; border-radius: var(--radius); box-shadow: var(--shadow-sm);
    transition: var(--transition); cursor: pointer;
}
.news-item:hover { box-shadow: var(--shadow-md); transform: translateX(5px); }
.news-item .news-date {
    flex-shrink: 0; width: 60px; text-align: center;
    padding: 8px 0; background: var(--primary); color: #fff; border-radius: var(--radius);
}
.news-item .news-date .day { font-size: 22px; font-weight: 700; line-height: 1; }
.news-item .news-date .month { font-size: 12px; }
.news-item .news-info { flex: 1; }
.news-item .news-info h4 { font-size: 16px; font-weight: 500; margin-bottom: 4px; }

/* ========== 底部 ========== */
.footer {
    background: var(--dark); color: rgba(255,255,255,0.7); padding: 60px 0 0;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr 1fr; gap: 40px; }
.footer-col h4 {
    color: #fff; font-size: 18px; font-weight: 600; margin-bottom: 20px;
    position: relative; padding-bottom: 12px;
}
.footer-col h4::after {
    content: ''; position: absolute; bottom: 0; left: 0; width: 30px; height: 2px;
    background: var(--primary);
}
.footer-col p { font-size: 14px; line-height: 1.8; margin-bottom: 8px; }
.footer-col a { display: block; font-size: 14px; padding: 6px 0; color: rgba(255,255,255,0.6); }
.footer-col a:hover { color: var(--primary); padding-left: 5px; }
.footer-bottom {
    margin-top: 40px; padding: 20px 0; border-top: 1px solid rgba(255,255,255,0.1);
    text-align: center; font-size: 13px;
}

/* ========== 悬浮咨询按钮 ========== */
.float-consult {
    position: fixed; right: 30px; bottom: 120px; z-index: 999;
}
.float-consult .consult-btn {
    width: 56px; height: 56px; border-radius: 50%; background: var(--primary-gradient);
    color: #fff; display: flex; align-items: center; justify-content: center;
    font-size: 24px; cursor: pointer; box-shadow: var(--shadow-md);
    transition: var(--transition);
}
.float-consult .consult-btn:hover {
    transform: scale(1.1); box-shadow: var(--shadow-lg);
}
.float-consult .consult-popup {
    display: none; position: absolute; bottom: 70px; right: 0;
    width: 320px; background: #fff; border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg); padding: 24px; z-index: 1000;
}
.float-consult .consult-popup.show { display: block; }
.float-consult .consult-popup h4 { font-size: 18px; margin-bottom: 15px; color: var(--dark); }

/* ========== 面包屑 ========== */
.breadcrumb { background: var(--gray-bg); padding: 12px 0; margin-top: 70px; }
.breadcrumb .container { display: flex; align-items: center; gap: 8px; font-size: 14px; color: var(--text-gray); }
.breadcrumb a:hover { color: var(--primary); }
.breadcrumb .sep { color: #ccc; }

/* ========== 产品列表页 ========== */
.product-layout { display: flex; gap: 30px; padding: 40px 0; }
.product-sidebar { flex: 0 0 260px; }
.product-sidebar .sidebar-card {
    background: #fff; border-radius: var(--radius-lg); box-shadow: var(--shadow-sm);
    padding: 20px; margin-bottom: 20px;
}
.sidebar-card h4 { font-size: 16px; font-weight: 600; margin-bottom: 15px; color: var(--dark); }
.category-tree li { padding: 8px 12px; cursor: pointer; border-radius: var(--radius); font-size: 14px; transition: var(--transition); }
.category-tree li:hover { color: var(--primary); background: var(--primary-light); }
.category-tree li.active { color: #fff; background: var(--primary); }
.category-tree .children { padding-left: 15px; }
.product-main { flex: 1; }
.product-search {
    display: flex; gap: 10px; margin-bottom: 25px;
}
.product-search input {
    flex: 1; padding: 10px 16px; border: 1px solid var(--gray-border);
    border-radius: var(--radius); font-size: 14px; outline: none;
    transition: var(--transition);
}
.product-search input:focus { border-color: var(--primary); }
.product-search button {
    padding: 10px 24px; background: var(--primary); color: #fff; border: none;
    border-radius: var(--radius); font-size: 14px; cursor: pointer; transition: var(--transition);
}
.product-search button:hover { background: var(--primary-dark); }
.product-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 25px; }
.product-card {
    background: #fff; border-radius: var(--radius-lg); overflow: hidden;
    box-shadow: var(--shadow-sm); transition: var(--transition); cursor: pointer;
}
.product-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.product-card .card-img { height: 220px; overflow: hidden; }
.product-card .card-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s; }
.product-card:hover .card-img img { transform: scale(1.05); }
.product-card .card-body { padding: 20px; }
.product-card .card-body h5 { font-size: 17px; font-weight: 600; margin-bottom: 8px; }
.product-card .card-body p { font-size: 13px; color: var(--text-gray); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

/* ========== 产品详情页 ========== */
.detail-layout { display: flex; gap: 40px; padding: 40px 0; }
.detail-gallery { flex: 0 0 45%; }
.detail-gallery img { width: 100%; border-radius: var(--radius-lg); }
.detail-info { flex: 1; }
.detail-info h1 { font-size: 28px; font-weight: 700; margin-bottom: 12px; }
.detail-info .subtitle { color: var(--text-gray); margin-bottom: 20px; font-size: 16px; }
.detail-info .params-table { width: 100%; border-collapse: collapse; margin-bottom: 25px; }
.detail-info .params-table td {
    padding: 10px 12px; border-bottom: 1px solid var(--gray-border); font-size: 14px;
}
.detail-info .params-table td:first-child { font-weight: 600; color: var(--dark); width: 35%; background: var(--gray-bg); }
.detail-info .btn-quote {
    display: inline-block; padding: 14px 40px; background: var(--primary-gradient);
    color: #fff; border: none; border-radius: 30px; font-size: 16px; font-weight: 600;
    cursor: pointer; transition: var(--transition);
}
.detail-info .btn-quote:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.detail-content { padding: 40px 0; }
.detail-content .tab-nav { display: flex; gap: 0; margin-bottom: 30px; border-bottom: 2px solid var(--gray-border); }
.detail-content .tab-nav span {
    padding: 12px 24px; cursor: pointer; font-size: 15px; font-weight: 500;
    color: var(--text-gray); border-bottom: 2px solid transparent; margin-bottom: -2px;
    transition: var(--transition);
}
.detail-content .tab-nav span.active { color: var(--primary); border-bottom-color: var(--primary); }

/* ========== 新闻列表页 ========== */
.news-tabs { display: flex; gap: 0; margin-bottom: 30px; border-bottom: 2px solid var(--gray-border); }
.news-tabs a {
    padding: 12px 24px; font-size: 15px; font-weight: 500; color: var(--text-gray);
    border-bottom: 2px solid transparent; margin-bottom: -2px; transition: var(--transition);
}
.news-tabs a.active { color: var(--primary); border-bottom-color: var(--primary); }
.news-archive { margin-bottom: 25px; }
.news-archive select {
    padding: 8px 16px; border: 1px solid var(--gray-border); border-radius: var(--radius);
    font-size: 14px; margin-right: 10px; outline: none;
}
.news-grid { display: flex; flex-direction: column; gap: 20px; }
.news-card {
    display: flex; gap: 20px; padding: 20px; background: #fff; border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm); transition: var(--transition); cursor: pointer;
}
.news-card:hover { box-shadow: var(--shadow-md); }
.news-card .news-card-img { flex: 0 0 200px; height: 140px; border-radius: var(--radius); overflow: hidden; }
.news-card .news-card-img img { width: 100%; height: 100%; object-fit: cover; }
.news-card .news-card-body { flex: 1; }
.news-card .news-card-body h4 { font-size: 18px; font-weight: 600; margin-bottom: 8px; }
.news-card .news-card-body .meta { font-size: 13px; color: var(--text-gray); margin-bottom: 8px; }
.news-card .news-card-body p { font-size: 14px; color: var(--text-gray); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }

/* ========== 荣誉资质 ========== */
.honor-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 25px; }
.honor-card {
    background: #fff; border-radius: var(--radius-lg); overflow: hidden;
    box-shadow: var(--shadow-sm); transition: var(--transition); cursor: pointer;
    text-align: center;
}
.honor-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }
.honor-card .honor-img { height: 260px; overflow: hidden; display: flex; align-items: center; justify-content: center; background: var(--gray-bg); }
.honor-card .honor-img img { max-height: 100%; object-fit: contain; padding: 15px; }
.honor-card .honor-body { padding: 15px; }
.honor-card .honor-body h5 { font-size: 15px; font-weight: 600; margin-bottom: 5px; }
.honor-card .honor-body p { font-size: 13px; color: var(--text-gray); }

/* 荣誉放大弹窗 */
.lightbox { display: none; position: fixed; inset: 0; z-index: 9999; background: rgba(0,0,0,0.9); }
.lightbox.show { display: flex; align-items: center; justify-content: center; }
.lightbox img { max-width: 90%; max-height: 90%; border-radius: var(--radius); }
.lightbox .close-btn { position: absolute; top: 30px; right: 40px; color: #fff; font-size: 36px; cursor: pointer; }

/* ========== 联系我们 ========== */
.contact-layout { display: flex; gap: 40px; padding: 40px 0; }
.contact-form-wrap { flex: 1; }
.contact-form-wrap h2 { font-size: 28px; font-weight: 700; margin-bottom: 30px; }
.contact-form .form-group { margin-bottom: 20px; }
.contact-form .form-group label {
    display: block; font-size: 14px; font-weight: 500; margin-bottom: 6px; color: var(--dark);
}
.contact-form .form-group label .required { color: var(--danger); }
.contact-form .form-group input,
.contact-form .form-group textarea,
.contact-form .form-group select {
    width: 100%; padding: 10px 14px; border: 1px solid var(--gray-border);
    border-radius: var(--radius); font-size: 14px; font-family: inherit;
    outline: none; transition: var(--transition);
}
.contact-form .form-group input:focus,
.contact-form .form-group textarea:focus { border-color: var(--primary); }
.contact-form .form-group textarea { height: 120px; resize: vertical; }
.contact-form .captcha-row { display: flex; gap: 15px; align-items: center; }
.contact-form .captcha-row input { flex: 1; }
.contact-form .captcha-row img { height: 40px; cursor: pointer; border-radius: var(--radius); }
.contact-form .btn-submit {
    padding: 12px 36px; background: var(--primary-gradient); color: #fff;
    border: none; border-radius: 30px; font-size: 16px; font-weight: 600;
    cursor: pointer; transition: var(--transition);
}
.contact-form .btn-submit:hover { box-shadow: var(--shadow-md); }
.contact-info-side { flex: 0 0 350px; }
.contact-info-side .info-card {
    background: #fff; padding: 30px; border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm); margin-bottom: 20px;
}
.contact-info-side .info-card h4 { font-size: 18px; font-weight: 600; margin-bottom: 15px; }
.contact-info-side .info-item {
    display: flex; gap: 12px; align-items: flex-start; padding: 12px 0;
    border-bottom: 1px solid var(--gray-border); font-size: 14px;
}
.contact-info-side .info-item .icon { color: var(--primary); font-size: 18px; margin-top: 2px; }
.contact-map { height: 300px; border-radius: var(--radius-lg); overflow: hidden; margin-top: 20px; }

/* ========== 弹窗/模态框 ========== */
.modal-overlay {
    display: none; position: fixed; inset: 0; z-index: 9999;
    background: rgba(0,0,0,0.5); align-items: center; justify-content: center;
}
.modal-overlay.show { display: flex; }
.modal-content {
    background: #fff; border-radius: var(--radius-lg); padding: 30px;
    width: 90%; max-width: 500px; max-height: 80vh; overflow-y: auto;
    box-shadow: var(--shadow-lg); position: relative;
}
.modal-content h3 { font-size: 22px; margin-bottom: 20px; color: var(--dark); }
.modal-close {
    position: absolute; top: 15px; right: 20px; font-size: 24px;
    cursor: pointer; color: var(--text-gray);
}
.modal-close:hover { color: var(--danger); }

/* ========== 分页 ========== */
.pagination { display: flex; justify-content: center; gap: 8px; margin-top: 40px; }
.pagination a, .pagination span {
    display: inline-block; padding: 8px 14px; border-radius: var(--radius);
    font-size: 14px; background: #fff; border: 1px solid var(--gray-border);
    transition: var(--transition);
}
.pagination a:hover { background: var(--primary); color: #fff; border-color: var(--primary); }
.pagination .active { background: var(--primary); color: #fff; border-color: var(--primary); }
.pagination .disabled { color: #ccc; cursor: not-allowed; }

/* ========== 按钮通用样式 ========== */
.btn {
    display: inline-block; padding: 10px 24px; border-radius: var(--radius);
    font-size: 14px; font-weight: 500; cursor: pointer; border: none;
    transition: var(--transition); text-align: center;
}
.btn-primary { background: var(--primary); color: #fff; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-outline { background: transparent; border: 1px solid var(--primary); color: var(--primary); }
.btn-outline:hover { background: var(--primary); color: #fff; }
.btn-sm { padding: 6px 14px; font-size: 13px; }

/* ========== 响应式 ========== */
@media (max-width: 1199px) {
    .product-grid { grid-template-columns: repeat(2, 1fr); }
    .business-grid { grid-template-columns: repeat(2, 1fr); }
    .honor-grid { grid-template-columns: repeat(3, 1fr); }
    .footer-grid { grid-template-columns: repeat(2, 1fr); }
    .news-section-inner { flex-direction: column; }
    .news-main { height: 250px; }
}
@media (max-width: 768px) {
    .header-nav { display: none; position: absolute; top: 70px; left: 0; right: 0; background: #fff; flex-direction: column; padding: 10px 0; box-shadow: var(--shadow-md); }
    .header-nav.show { display: flex; }
    .mobile-menu-btn { display: block; }
    .product-layout { flex-direction: column; }
    .product-sidebar { flex: none; }
    .product-grid { grid-template-columns: repeat(2, 1fr); }
    .detail-layout { flex-direction: column; }
    .honor-grid { grid-template-columns: repeat(2, 1fr); }
    .contact-layout { flex-direction: column; }
    .contact-info-side { flex: none; }
    .banner-section .swiper-container { height: 350px; }
    .swiper-slide .slide-content h2 { font-size: 28px; }
    .swiper-slide .slide-content p { font-size: 15px; }
    .section { padding: 50px 0; }
    .section-title h2 { font-size: 26px; }
    .news-card { flex-direction: column; }
    .news-card .news-card-img { flex: none; height: 180px; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 480px) {
    .product-grid { grid-template-columns: 1fr; }
    .business-grid { grid-template-columns: 1fr; }
    .honor-grid { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
}