/* 
 * 迪瑞机电官网 - 全局样式
 * 主色调：#C41E3A（品牌红）
 * 设计风格：工业科技感，专业可信
 */

/* ===== 基础样式重置 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: "Microsoft YaHei", "微软雅黑", "PingFang SC", "Helvetica Neue", Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: #333333;
    background-color: #ffffff;
}

a {
    color: #C41E3A;
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: #A01830;
}

img {
    max-width: 100%;
    height: auto;
}

ul {
    list-style: none;
}

/* ===== 容器 ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ===== 导航栏 ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background-color: #ffffff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.navbar.scrolled {
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
}

.navbar-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto;
    padding: 10px 20px;
}

.navbar-logo {
    display: flex;
    align-items: center;
}

.navbar-logo img {
    height: 40px;
    width: auto;
    max-width: 160px;
    object-fit: contain;
    transition: all 0.3s ease;
}

.navbar-menu {
    flex: 1;
    display: flex;
    justify-content: center;
}

.navbar-nav {
    display: flex;
    align-items: center;
    gap: 30px;
}

.nav-item {
    position: relative;
}

.nav-item > a {
    display: block;
    padding: 15px 0;
    color: #333333;
    font-size: 16px;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-item > a:hover,
.nav-item.active > a {
    color: #C41E3A;
}

.nav-item.active > a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
}

/* 产品选型高亮导航项 */
.nav-item.nav-highlight > a {
    background: linear-gradient(135deg, #C41E3A 0%, #A01830 100%);
    color: #ffffff !important;
    padding: 10px 20px;
    border-radius: 25px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.nav-item.nav-highlight > a:hover {
    background: linear-gradient(135deg, #A01830 0%, #C41E3A 100%);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(196, 30, 58, 0.4);
}
    height: 3px;
    background-color: #C41E3A;
}

/* 下拉菜单 */
.has-dropdown {
    position: relative;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    min-width: 180px;
    background-color: #ffffff;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.15);
    border-radius: 4px;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    padding: 10px 0;
}

.has-dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
}

.dropdown-menu li a {
    display: block;
    padding: 10px 20px;
    color: #333333;
    font-size: 14px;
    transition: all 0.3s ease;
}

.dropdown-menu li a:hover {
    background-color: #f5f5f5;
    color: #C41E3A;
}

/* 导航栏CTA按钮 */
.navbar-cta {
    margin-left: 20px;
}

/* 汉堡菜单 */
.navbar-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 24px;
    background: none;
    border: none;
    cursor: pointer;
}

.navbar-toggle span {
    display: block;
    width: 100%;
    height: 3px;
    background-color: #333333;
    border-radius: 2px;
    transition: all 0.3s ease;
}

.navbar-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.navbar-toggle.active span:nth-child(2) {
    opacity: 0;
}

.navbar-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* ===== 按钮样式 ===== */
.btn-primary {
    display: inline-block;
    background-color: #C41E3A;
    color: #ffffff !important;
    padding: 12px 32px;
    border-radius: 6px;
    font-size: 16px;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
    min-width: 140px;
}

.btn-primary:hover {
    background-color: #A01830;
    color: #ffffff !important;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(196, 30, 58, 0.3);
}

.btn-secondary {
    display: inline-block;
    background-color: rgba(255, 255, 255, 0.95);
    color: #C41E3A !important;
    padding: 10px 24px;
    border-radius: 6px;
    font-size: 14px;
    font-weight: 500;
    border: 2px solid #C41E3A;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.btn-secondary:hover {
    background-color: #C41E3A;
    border-color: #C41E3A;
    color: #ffffff !important;
}

/* ===== Hero Banner ===== */

.hero-banner {
    background: linear-gradient(rgba(0,0,0,0.6), rgba(0,0,0,0.6)),
                url('../images/厂区大门.jpg') center/cover no-repeat;
    padding: 120px 0 80px;
    min-height: 600px;
    display: flex;
    align-items: center;
    position: relative;
}
.hero-content {
    text-align: center;
}

.hero-content h1 {
    font-size: 36px;
    font-weight: 700;
    color: #ffffff;
    margin-bottom: 20px;
    line-height: 1.3;
}

.hero-subtitle {
    font-size: 20px;
    color: #ffffff;
    margin-bottom: 30px;
    opacity: 0.9;
}

.hero-subtitle strong {
    color: #ffd700;
}

/* 核心优势横幅 */
.hero-advantage {
    background: rgba(0, 0, 0, 0.25);
    color: #ffffff;
    padding: 25px 30px;
    border-radius: 12px;
    margin-bottom: 35px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(10px);
}

.advantage-badge {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 15px;
}

.badge-icon {
    font-size: 28px;
}

.advantage-flow {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 15px;
    font-size: 16px;
    margin-bottom: 15px;
    padding: 15px 0;
    border-top: 1px solid rgba(255, 255, 255, 0.3);
    border-bottom: 1px solid rgba(255, 255, 255, 0.3);
}

.advantage-compare {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px;
    font-size: 15px;
}

.compare-label {
    font-weight: 600;
}

.compare-item {
    opacity: 0.9;
}

.compare-divider {
    opacity: 0.5;
}

.compare-highlight {
    font-weight: 700;
    font-size: 18px;
    color: #ffeb3b;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 20px;
}

.hero-hotline {
    font-size: 18px;
    color: #666666;
}

.hero-hotline a {
    font-size: 24px;
    font-weight: 700;
    color: #C41E3A;
}

/* ===== 痛点共鸣区域 ===== */
.pain-points {
    padding: 80px 0;
    background-color: #f8f9fa;
}

.pain-points h2 {
    text-align: center;
    font-size: 32px;
    color: #1a1a2e;
    margin-bottom: 50px;
}

.pain-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 25px;
}

.pain-item  {
    background-color: #ffffff;
    padding: 30px 25px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.pain-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.12);
}

.pain-item h3 {
    font-size: 20px;
    color: #C41E3A;
    margin-bottom: 10px;
}

.pain-item p {
    color: #666666;
    margin-bottom: 15px;
}

.pain-item .solution {
    display: block;
    font-size: 14px;
    color: #00A86B;
    font-weight: 500;
}

/* ===== 产品区域 ===== */
.products {
    padding: 80px 0;
}

.products h2 {
    text-align: center;
    font-size: 32px;
    color: #1a1a2e;
    margin-bottom: 50px;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.product-card {
    background-color: #ffffff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    position: relative;
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.product-badge {
    position: absolute;
    top: 12px;
    left: 12px;
    background: rgba(196, 30, 58, 0.92);
    color: #ffffff;
    padding: 8px 16px;
    border-radius: 4px;
    font-size: 13px;
    font-weight: 500;
    z-index: 10;
    letter-spacing: 0.5px;
    box-shadow: 0 2px 8px rgba(196, 30, 58, 0.3);
}

.product-image {
    width: 100%;
    height: 200px;
    overflow: hidden;
    background-color: #f5f5f5;
}

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

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

.product-content {
    padding: 25px;
}

.product-content h3 {
    font-size: 22px;
    color: #1a1a2e;
    margin-bottom: 12px;
}

.product-content > p {
    color: #666666;
    font-size: 14px;
    line-height: 1.6;
    margin-bottom: 15px;
}

.product-features {
    margin-bottom: 20px;
}

.product-features li {
    font-size: 14px;
    color: #555555;
    padding: 5px 0;
    border-bottom: 1px dashed #eeeeee;
}

.product-features li:last-child {
    border-bottom: none;
}

.product-buttons {
    display: flex;
    gap: 10px;
}

.product-buttons .btn-secondary,
.product-buttons .btn-primary {
    flex: 1;
    padding: 10px 15px;
    font-size: 14px;
    min-width: auto;
}

/* ===== 为什么选择迪瑞 ===== */
.why-choose {
    padding: 80px 0;
    background-color: #f8f9fa;
}

.why-choose > .container > h2 {
    text-align: center;
    font-size: 32px;
    color: #1a1a2e;
    margin-bottom: 50px;
}

.advantage-section {
    background-color: #ffffff;
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    margin-bottom: 40px;
}

.advantage-section h3 {
    font-size: 26px;
    color: #C41E3A;
    margin-bottom: 30px;
    padding-bottom: 15px;
    border-bottom: 2px solid #C41E3A;
}

.delivery-compare {
    margin-bottom: 40px;
}

.delivery-compare h4 {
    font-size: 20px;
    color: #1a1a2e;
    margin-bottom: 20px;
}

.delivery-compare table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 20px;
}

.delivery-compare th,
.delivery-compare td {
    padding: 15px;
    text-align: center;
    border: 1px solid #e0e0e0;
}

.delivery-compare th {
    background-color: #f5f5f5;
    font-weight: 600;
    color: #1a1a2e;
}

.delivery-compare .highlight-row {
    background-color: #fff3f3;
}

.delivery-compare .highlight-row td {
    font-weight: 600;
    color: #C41E3A;
}

.digital-tech h4 {
    font-size: 20px;
    color: #1a1a2e;
    margin-bottom: 20px;
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
}

.tech-item {
    background-color: #f8f9fa;
    padding: 25px;
    border-radius: 8px;
    border-left: 4px solid #C41E3A;
}

.tech-item h5 {
    font-size: 16px;
    color: #1a1a2e;
    margin-bottom: 10px;
}

.tech-item p {
    font-size: 14px;
    color: #666666;
    line-height: 1.6;
}

.testimonial {
    margin-top: 30px;
    padding: 25px;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border-radius: 8px;
    border-left: 4px solid #C41E3A;
}

.testimonial blockquote {
    font-size: 16px;
    color: #555555;
    font-style: italic;
    line-height: 1.8;
    margin-bottom: 10px;
}

.testimonial cite {
    display: block;
    text-align: right;
    font-size: 14px;
    color: #888888;
}

.other-advantages {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
}

.advantage-item {
    background-color: #ffffff;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
}

.advantage-item h3 {
    font-size: 18px;
    color: #1a1a2e;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 2px solid #C41E3A;
}

.advantage-item ul li {
    font-size: 14px;
    color: #666666;
    padding: 8px 0;
    padding-left: 20px;
    position: relative;
}

.advantage-item ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #C41E3A;
    font-weight: bold;
}

/* ===== 工程案例 ===== */
.cases {
    padding: 80px 0;
}

.cases h2 {
    text-align: center;
    font-size: 32px;
    color: #1a1a2e;
    margin-bottom: 50px;
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
    margin-bottom: 40px;
}

.case-item {
    background-color: #ffffff;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    text-align: center;
    transition: transform 0.3s ease;
}

.case-item:hover {
    transform: translateY(-5px);
}

.case-item h3 {
    font-size: 20px;
    color: #1a1a2e;
    margin-bottom: 10px;
}

.case-item .case-count {
    font-size: 28px;
    font-weight: 700;
    color: #C41E3A;
    margin-bottom: 10px;
}

.case-item p:last-child {
    font-size: 14px;
    color: #666666;
}

.cases-more {
    text-align: center;
}

/* ===== FAQ ===== */
.faq {
    padding: 80px 0;
    background-color: #f8f9fa;
}

.faq h2 {
    text-align: center;
    font-size: 32px;
    color: #1a1a2e;
    margin-bottom: 50px;
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background-color: #ffffff;
    margin-bottom: 15px;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.08);
}

.faq-item h3 {
    padding: 20px 25px;
    font-size: 16px;
    color: #1a1a2e;
    cursor: pointer;
    position: relative;
    transition: background-color 0.3s ease;
}

.faq-item h3:hover {
    background-color: #f5f5f5;
}

.faq-item h3::after {
    content: '+';
    position: absolute;
    right: 25px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 20px;
    color: #C41E3A;
    font-weight: bold;
}

.faq-item.active h3::after {
    content: '-';
}

.faq-answer {
    padding: 0 25px;
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item.active .faq-answer {
    padding: 0 25px 20px;
    max-height: 500px;
}

.faq-answer p {
    font-size: 14px;
    color: #666666;
    line-height: 1.8;
    margin-bottom: 10px;
}

.faq-answer ul {
    margin-left: 20px;
    margin-bottom: 10px;
}

.faq-answer ul li {
    font-size: 14px;
    color: #666666;
    padding: 5px 0;
    list-style: disc;
}

/* ===== 新闻动态 ===== */
.news {
    padding: 80px 0;
}

.news h2 {
    text-align: center;
    font-size: 32px;
    color: #1a1a2e;
    margin-bottom: 50px;
}

.news-list {
    max-width: 800px;
    margin: 0 auto 40px;
}

.news-item {
    display: flex;
    align-items: center;
    padding: 20px;
    background-color: #ffffff;
    border-radius: 8px;
    margin-bottom: 15px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease;
}

.news-item:hover {
    transform: translateX(5px);
}

.news-date {
    flex-shrink: 0;
    width: 100px;
    font-size: 14px;
    color: #999999;
    margin-right: 20px;
}

.news-item a {
    font-size: 16px;
    color: #1a1a2e;
    transition: color 0.3s ease;
}

.news-item a:hover {
    color: #C41E3A;
}

.news-more {
    text-align: center;
}

/* ===== 页脚 ===== */
.footer {
    background-color: #1a1a2e;
    color: #ffffff;
    padding: 60px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-info h3 {
    font-size: 20px;
    margin-bottom: 20px;
    color: #ffffff;
}

.footer-info p {
    font-size: 14px;
    color: #aaaaaa;
    margin-bottom: 10px;
    line-height: 1.8;
}

.footer-info a {
    color: #ffffff;
}

.footer-info a:hover {
    color: #C41E3A;
}

.footer-nav h4,
.footer-advantages h4 {
    font-size: 16px;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid #C41E3A;
    color: #ffffff;
}

.footer-nav ul li,
.footer-advantages ul li {
    font-size: 14px;
    margin-bottom: 10px;
}

.footer-nav ul li a {
    color: #aaaaaa;
    transition: color 0.3s ease;
}

.footer-nav ul li a:hover {
    color: #ffffff;
}

.footer-advantages ul li {
    color: #aaaaaa;
}

.footer-bottom {
    padding-top: 30px;
    border-top: 1px solid #333333;
    text-align: center;
}

.footer-bottom p {
    font-size: 14px;
    color: #888888;
    margin-bottom: 15px;
}

.footer-bottom a {
    color: #888888;
}

.footer-bottom a:hover {
    color: #ffffff;
}

.footer-links {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-links a {
    font-size: 13px;
    color: #666666;
}

.footer-links a:hover {
    color: #C41E3A;
}

/* ===== 浮动咨询按钮 ===== */
.float-consult {
    position: fixed;
    right: 20px;
    bottom: 100px;
    z-index: 999;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.consult-phone {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background-color: #1a3a5c;
    color: #d48500;
    border-radius: 50%;
    font-size: 24px;
    box-shadow: 0 5px 20px rgba(26, 58, 92, 0.4);
    transition: all 0.3s ease;
}

.consult-phone:hover {
    transform: scale(1.1);
    background-color: #2d5a87;
    color: #d48500;
}

.consult-online {
    padding: 10px 15px;
    font-size: 14px;
    min-width: auto;
}

/* ===== 页面通用标题 ===== */
.page-banner {
   /*background: linear-gradient(135deg, #1a1a2e 0%, #2d2d44 100%);*/
    background: linear-gradient(rgba(0,0,0,0.6), rgba(0,0,0,0.6)),
                url('../images/厂区大门2.jpg') center/cover no-repeat;
                
    padding: 120px 0 60px;
    text-align: center;
    color: #ffffff;
}

.page-banner h1 {
    font-size: 32px;
    margin-bottom: 15px;
}

.page-banner p {
    font-size: 16px;
    opacity: 0.8;
}

/* ===== 面包屑导航 ===== */
.breadcrumb {
    padding: 15px 0;
    background-color: #f5f5f5;
    font-size: 14px;
}

.breadcrumb a {
    color: #666666;
}

.breadcrumb span {
    color: #999999;
    margin: 0 8px;
}

/* ===== 产品页面样式 ===== */
.product-overview {
    padding: 60px 0;
}

.product-overview h2 {
    font-size: 28px;
    color: #1a1a2e;
    margin-bottom: 20px;
}

.product-overview > .container > p {
    font-size: 16px;
    color: #666666;
    line-height: 1.8;
    margin-bottom: 30px;
}

.product-list {
    padding: 60px 0;
    background-color: #f8f9fa;
}

.product-detail-card {
    background-color: #ffffff;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    margin-bottom: 40px;
}

.product-detail-header {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 30px;
    padding: 30px;
}

.product-detail-image {
    background-color: #f5f5f5;
    border-radius: 8px;
    overflow: hidden;
}

.product-detail-image img {
    width: 100%;
    height: auto;
}

.product-detail-info h3 {
    font-size: 24px;
    color: #1a1a2e;
    margin-bottom: 15px;
}

.product-detail-info > p {
    font-size: 15px;
    color: #666666;
    line-height: 1.8;
    margin-bottom: 20px;
}

.product-specs {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 20px;
}

.product-specs th,
.product-specs td {
    padding: 12px 15px;
    text-align: left;
    border: 1px solid #e0e0e0;
}

.product-specs th {
    background-color: #f5f5f5;
    width: 120px;
    font-weight: 500;
    color: #333333;
}

.product-detail-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 15px;
    margin-bottom: 20px;
}

.product-detail-features li {
    font-size: 14px;
    color: #555555;
    padding: 10px 15px;
    background-color: #f8f9fa;
    border-radius: 6px;
    border-left: 3px solid #C41E3A;
}

.product-delivery {
    margin: 20px 0;
    padding: 20px;
    background: linear-gradient(135deg, #fff3f3 0%, #ffe8e8 100%);
    border-radius: 8px;
}

.product-delivery h4 {
    font-size: 16px;
    color: #C41E3A;
    margin-bottom: 15px;
}

.product-delivery table {
    width: 100%;
    border-collapse: collapse;
}

.product-delivery th,
.product-delivery td {
    padding: 10px 15px;
    text-align: center;
    border: 1px solid #f0d0d0;
}

.product-delivery th {
    background-color: #ffe0e0;
    font-weight: 500;
}

.product-detail-buttons {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

/* ===== 关于我们页面 ===== */
.about-intro {
    padding: 60px 0;
}

.about-intro h2 {
    font-size: 28px;
    color: #1a1a2e;
    margin-bottom: 20px;
}

.about-intro > .container > p {
    font-size: 16px;
    color: #666666;
    line-height: 1.8;
    margin-bottom: 30px;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 25px;
    margin-top: 40px;
}

.stat-item {
    text-align: center;
    padding: 30px 20px;
    background-color: #ffffff;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
}

.stat-item .stat-number {
    font-size: 36px;
    font-weight: 700;
    color: #C41E3A;
    margin-bottom: 10px;
}

.stat-item .stat-label {
    font-size: 14px;
    color: #666666;
}

/* ===== 联系我们页面 ===== */
.contact-section {
    padding: 60px 0;
}

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

.contact-info h2 {
    font-size: 28px;
    color: #1a1a2e;
    margin-bottom: 30px;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    margin-bottom: 25px;
    padding: 20px;
    background-color: #f8f9fa;
    border-radius: 8px;
}

.contact-icon {
    font-size: 24px;
    margin-right: 15px;
}

.contact-item h4 {
    font-size: 16px;
    color: #1a1a2e;
    margin-bottom: 8px;
}

.contact-item p {
    font-size: 14px;
    color: #666666;
}

.contact-item a {
    color: #C41E3A;
    font-weight: 500;
}

.contact-form h2 {
    font-size: 28px;
    color: #1a1a2e;
    margin-bottom: 30px;
}

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

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: #333333;
    margin-bottom: 8px;
}

.form-group label span {
    color: #C41E3A;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 15px;
    font-size: 14px;
    border: 1px solid #e0e0e0;
    border-radius: 6px;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #C41E3A;
    box-shadow: 0 0 0 3px rgba(196, 30, 58, 0.1);
}

.form-group textarea {
    min-height: 120px;
    resize: vertical;
}

.form-submit {
    margin-top: 30px;
}

/* ===== 服务流程 ===== */
.service-process {
    padding: 60px 0;
    background-color: #f8f9fa;
}

.service-process h2 {
    text-align: center;
    font-size: 28px;
    color: #1a1a2e;
    margin-bottom: 40px;
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.process-step {
    text-align: center;
    padding: 30px 20px;
    background-color: #ffffff;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
    position: relative;
}

.process-step::after {
    content: '→';
    position: absolute;
    right: -15px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 24px;
    color: #C41E3A;
}

.process-step:last-child::after {
    display: none;
}

.step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background-color: #C41E3A;
    color: #ffffff;
    border-radius: 50%;
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 15px;
}

.process-step h4 {
    font-size: 16px;
    color: #1a1a2e;
    margin-bottom: 10px;
}

.process-step p {
    font-size: 14px;
    color: #666666;
}

/* ===== AI智能对话窗口 ===== */
.ai-chat-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 10000;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.ai-chat-container {
    width: 90%;
    max-width: 500px;
    height: 80vh;
    max-height: 700px;
    background-color: #ffffff;
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.ai-chat-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    background: linear-gradient(135deg, #1a3a5c 0%, #2d5a87 100%);
    color: #ffffff;
}

.ai-chat-title {
    font-size: 18px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 8px;
}

.ai-chat-title::before {
    content: "🤖";
    font-size: 20px;
}

.ai-chat-close {
    background: none;
    border: none;
    color: #ffffff;
    font-size: 28px;
    cursor: pointer;
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: background-color 0.3s ease;
}

.ai-chat-close:hover {
    background-color: rgba(255, 255, 255, 0.2);
}

.ai-chat-body {
    flex: 1;
    position: relative;
    background-color: #f5f7fa;
}

.ai-chat-body iframe {
    width: 100%;
    height: 100%;
    border: none;
}

/* 移动端适配 */
@media (max-width: 768px) {
    .ai-chat-container {
        width: 95%;
        height: 85vh;
        border-radius: 12px;
    }
    
    .ai-chat-header {
        padding: 12px 16px;
    }
    
    .ai-chat-title {
        font-size: 16px;
    }
}
/* ===== 管壳式换热器页面专用样式 ===== */
/* ===== 管壳式换热器页面专用样式 ===== */
/* ===== 管壳式换热器页面专用样式 ===== */

/* 1. 产品概述高亮区域 - 保持卡片式设计 */
.product-overview {
    margin-bottom: 50px;
}

.product-overview article {
    background: white;
    border-radius: 16px;
    padding: 40px;
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.1);
    position: relative;
    overflow: hidden;
}

.product-overview article::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(90deg, #C41E3A, #e74c3c);
}

.product-overview h2 {
    font-size: 32px;
    color: #1a1a2e;
    margin-bottom: 20px;
    font-weight: 700;
}

.product-overview p {
    font-size: 16px;
    color: #555;
    margin-bottom: 30px;
    line-height: 1.7;
}

.product-overview .overview-highlights {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 20px;
    margin-top: 35px;
}

.product-overview .highlight-item {
    background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
    padding: 20px;
    border-radius: 12px;
    text-align: center;
    border: 1px solid #e0e0e0;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.product-overview .highlight-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
}

.product-overview .highlight-icon {
    font-size: 32px;
    display: block;
    margin-bottom: 12px;
}

.product-overview .highlight-text {
    font-size: 14px;
    color: #333;
}

.product-overview .highlight-text strong {
    color: #C41E3A;
    display: block;
    margin-bottom: 5px;
}

/* 2. 章节头部 - 统一风格 */
.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-header h2 {
    font-size: 32px;
    color: #1a1a2e;
    margin-bottom: 15px;
    font-weight: 700;
}

.section-header p {
    font-size: 16px;
    color: #666;
}

/* 3. 产品系列区域 - 核心卡片设计 */
.product-series {
    padding: 60px 0;
    background-color: #f8f9fa;
}

.series-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(360px, 1fr));
    gap: 30px;
}

/* 产品卡片 - 红色标题栏设计（不含图片） */
.product-series .product-card {
    background: #ffffff;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
}

.product-series .product-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
}

/* 红色标题栏 - 7天交付（仅文字，不含图片） */
.product-card-header {
    position: relative;
    background: linear-gradient(135deg, #C41E3A 0%, #A01830 100%);
    padding: 18px 20px;
    text-align: center;
    color: white;
}

.delivery-tag {
    display: block;
    color: #ffffff;
    font-size: 18px;
    font-weight: 700;
    letter-spacing: 1px;
}

.delivery-tag::before {
    content: "⚡";
    margin-right: 8px;
    font-size: 20px;
}

/* 卡片图片区域 - 独立放置 */
.product-card-img {
    padding: 25px;
    text-align: center;
    background: #f5f5f5;
    border-bottom: 1px solid #eee;
}

.product-card-img img {  max-width: 100%;
  
    height: auto;
    max-height: 160px;
    object-fit: contain;
}

/* 卡片内容区域 */
.product-card-body {
    padding: 25px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.product-card-body h3 {
    font-size: 20px;
    color: #1a1a2e;
    margin-bottom: 12px;
    border-left: 4px solid #C41E3A;
    padding-left: 12px;
}

.product-card-body > p {
    font-size: 14px;
    color: #666;
    line-height: 1.6;
    margin-bottom: 20px;
}

/* 规格表格 */
.specs-table {
    margin-bottom: 20px;
}

.specs-table h4,
.product-features h4,
.delivery-info h4 {
    font-size: 15px;
    font-weight: 600;
    color: #1a1a2e;
    margin-bottom: 12px;
    padding-bottom: 6px;
    border-bottom: 2px solidC41E3A;
    displ #ay: inline-block;
}

.specs-table table {
    width: 100%;
    border-collapse: collapse;
    background: #f8f9fa;
    border-radius: 8px;
    overflow: hidden;
}

.specs-table th,
.specs-table td {
    padding: 10px 12px;
    font-size: 13px;
    text-align: left;
    border-bottom: 1px solid #e0e0e0;
}

.specs-table th {
    background: #e8e8e8;
    font-weight: 600;
    color: #333;
    width: 100px;
}

.specs-table tr:last-child td,
.specs-table tr:last-child th {
    border-bottom: none;
}

/* 产品特点 */
.product-features {
    margin-bottom: 20px;
}

.product-features ul {
    list-style: none;
    padding: 0;
}

.product-features li {
    font-size: 13px;
    color: #555;
    padding: 6px 0;
    padding-left: 20px;
    position: relative;
}

.product-features li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: #C41E3A;
    font-weight: bold;
}

/* 交付信息 */
.delivery-info {
    background: #fff8f0;
    padding: 15px;
    border-radius: 10px;
    margin-bottom: 20px;
}

.delivery-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 0;
    border-bottom: 1px dashed #f0d0b0;
}

.delivery-row:last-child {
    border-bottom: none;
}

.delivery-type {
    font-size: 14px;
    color: #555;
}

.delivery-time {
    font-size: 14px;
    font-weight: 600;
    color: #333;
}

.delivery-time.highlight {
    color: #C41E3A;
    font-size: 18px;
    font-weight: 700;
}

/* 卡片按钮 */
.product-card-actions {
    display: flex;
    gap: 12px;
    margin-top: auto;
    padding-top: 15px;
}

.product-card-actions .btn-primary,
.product-card-actions .btn-secondary {
    flex: 1;
    text-align: center;
    padding: 10px 15px;
    font-size: 14px;
}

/* 技术特点区域 */
.technical-features {
    padding: 60px 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.technical-features .feature-item {
    text-align: center;
    padding: 35px 25px;
    background: #ffffff;
    border-radius: 12px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.06);
    transition: all 0.3s ease;
    border: 1px solid #f0f0f0;
}

.technical-features .feature-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
    border-color: #C41E3A;
}

.technical-features .feature-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.technical-features .feature-item h3 {
    font-size: 18px;
    color: #1a1a2e;
    margin-bottom: 12px;
}

.technical-features .feature-item p {
    font-size: 14px;
    color: #666;
    line-height: 1.6;
}

/* 应用场景区域 */
.application-scenarios {
    padding: 60px 0;
    background-color: #f8f9fa;
}

.scenarios-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 25px;
}

.scenario-item {
    background: #ffffff;
    padding: 25px;
    border-radius: 12px;
    border-left: 4px solid #C41E3A;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease;
}

.scenario-item:hover {
    transform: translateX(5px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.scenario-item h3 {
    font-size: 18px;
    color: #1a1a2e;
    margin-bottom: 12px;
}

.scenario-item p {
    font-size: 14px;
    color: #666;
    line-height: 1.6;
    margin-bottom: 8px;
}

.scenario-item p:last-child {
    margin-bottom: 0;
}

.scenario-item strong {
    color: #C41E3A;
}

/* 选型指南区域 */
.selection-guide {
    padding: 60px 0;
}

.guide-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 25px;
    margin-bottom: 40px;
}

.guide-step {
    background: #f8f9fa;
    padding: 25px;
    border-radius: 12px;
    text-align: center;
    transition: all 0.3s ease;
}

.guide-step:hover {
    background: #ffffff;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    transform: translateY(-3px);
}

.step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: #C41E3A;
    color: #ffffff;
    border-radius: 50%;
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 15px;
}

.guide-step h3 {
    font-size: 16px;
    color: #1a1a2e;
    margin-bottom: 15px;
}

.guide-step ul {
    list-style: none;
    text-align: left;
    padding-left: 0;
}

.guide-step li {
    font-size: 13px;
    color: #666;
    padding: 5px 0;
    padding-left: 20px;
    position: relative;
}

.guide-step li::before {
    content: "•";
    position: absolute;
    left: 5px;
    color: #C41E3A;
    font-weight: bold;
}

.guide-cta {
    text-align: center;
    background: linear-gradient(135deg, #fff3f3 0%, #ffe8e8 100%);
    padding: 35px;
    border-radius: 16px;
}

.guide-cta p {
    font-size: 18px;
    margin-bottom: 20px;
}

.guide-cta p strong {
    color: #C41E3A;
}

/* FAQ区域 */
.faq-section {
    padding: 60px 0;
    background-color: #f8f9fa;
}

.faq-section .faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-section .faq-item {
    background: #ffffff;
    border-radius: 12px;
    margin-bottom: 15px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.faq-question {
    padding: 18px 25px;
    font-size: 16px;
    font-weight: 600;
    color: #1a1a2e;
    cursor: pointer;
    list-style: none;
    position: relative;
    transition: background 0.3s ease;
}

.faq-question::-webkit-details-marker {
    display: none;
}

.faq-question::after {
    content: '+';
    position: absolute;
    right: 25px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 20px;
    color: #C41E3A;
    font-weight: bold;
}

.faq-item[open] .faq-question::after {
    content: '-';
}

.faq-question:hover {
    background: #f5f5f5;
}

.faq-answer {
    padding: 0 25px 20px 25px;
    border-top: 1px solid #eee;
}

.faq-answer p,
.faq-answer ul,
.faq-answer ol {
    font-size: 14px;
    color: #666;
    line-height: 1.7;
}

.faq-answer ul,
.faq-answer ol {
    padding-left: 20px;
    margin: 10px 0;
}

.faq-answer li {
    margin: 5px 0;
}

.faq-answer strong {
    color: #C41E3A;
}

/* CTA区域 */
.cta-section {
    padding: 60px 0;
    background: linear-gradient(135deg, #1a1a2e 0%, #2d2d44 100%);
    color: #ffffff;
    text-align: center;
}

.cta-content h2 {
    font-size: 28px;
    margin-bottom: 15px;
    color: #ffffff;
}

.cta-content p {
    font-size: 16px;
    margin-bottom: 30px;
    opacity: 0.9;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.cta-buttons .btn-primary {
    background-color: #C41E3A;
    color: #ffffff;
    padding: 12px 32px;
    border-radius: 6px;
    font-size: 16px;
    font-weight: 600;
    transition: all 0.3s ease;
}

.cta-buttons .btn-primary:hover {
    background-color: #A01830;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(196, 30, 58, 0.3);
}

.cta-buttons .btn-secondary {
    background-color: transparent;
    border: 2px solid #ffffff;
    color: #ffffff;
    padding: 10px 28px;
    border-radius: 6px;
    font-size: 16px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.cta-buttons .btn-secondary:hover {
    background-color: rgba(255, 255, 255, 0.1);
    border-color: #ffffff;
}

/* 浮动按钮 */
.float-buttons {
    position: fixed;
    right: 20px;
    bottom: 80px;
    z-index: 999;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.float-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 50px;
    height: 50px;
    background-color: #1a3a5c;
    color: #ffffff;
    border-radius: 50%;
    font-size: 24px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
    text-decoration: none;
}

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

.float-phone {
    background-color: #C41E3A;
}

.float-phone:hover {
    background-color: #A01830;
}

.float-top {
    background-color: #333333;
}

.float-top:hover {
    background-color: #C41E3A;
}

/* 响应式适配 */
@media (max-width: 768px) {
    .section-header h2 {
        font-size: 24px;
    }
    
    .series-grid {
        grid-template-columns: 1fr;
    }
    
    .scenarios-grid {
        grid-template-columns: 1fr;
    }
    
    .guide-steps {
        grid-template-columns: 1fr;
    }
    
    .overview-highlights {
        grid-template-columns: 1fr 1fr;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .cta-buttons .btn-primary,
    .cta-buttons .btn-secondary {
        width: 80%;
    }
    
    .product-card-actions {
        flex-direction: column;
    }
}

@media (max-width: 480px) {
    .overview-highlights {
        grid-template-columns: 1fr;
    }
    
    .product-card-body {
        padding: 20px;
    }
    
    .specs-table th,
    .specs-table td {
        padding: 8px 10px;
        font-size: 12px;
    }
    
    .specs-table th {
        width: 80px;
    }


}


/* 工厂展示区域标题居中 */
.factory-showcase h2 {
    text-align: center;
}


/* 痛点区域 - 卡片样式（红色标题栏 + 白色7天交付标签） */


/* ===== 首页美化增强样式 ===== */
/* 在不修改原有HTML结构的前提下，增加视觉层次、间距、卡片质感及响应式优化 */

/* 1. 全局细节优化 */
body {
    background-color: #ffffff;
    scroll-behavior: smooth;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

/* 2. 厂区展示区域美化 */
.factory-showcase {
    padding: 60px 0 40px;
    background: linear-gradient(to bottom, #ffffff, #f9fafb);
}

.factory-showcase h2 {
    text-align: center;
    font-size: 28px;
    font-weight: 700;
    color: #1a1a2e;
    margin-bottom: 32px;
    position: relative;
    padding-bottom: 16px;
}

.factory-showcase h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background: linear-gradient(90deg, #C41E3A, #e67e22);
    border-radius: 3px;
}

.factory-image img {
    border-radius: 20px;
    box-shadow: 0 20px 35px -10px rgba(0,0,0,0.15);
    transition: transform 0.3s ease;
}

.factory-image img:hover {
    transform: scale(1.01);
}

.image-caption {
    font-size: 14px;
    color: #6b7280;
    margin-top: 16px;
    font-weight: 500;
}

/* 3. 痛点区域 (problem-section) 卡片彻底美化 */
.problem-section {
    padding: 70px 0;
    background: #f8fafc;
}

.problem-section h2 {
    text-align: center;
    font-size: 28px;
    font-weight: 700;
    color: #0f172a;
    margin-bottom: 48px;
}

.problem-section .pain-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 28px;
}

.problem-section .problem-grid {
    background: #ffffff;
    border-radius: 24px;
    padding: 0;
    overflow: hidden;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.05), 0 8px 10px -6px rgba(0, 0, 0, 0.02);
    transition: all 0.3s cubic-bezier(0.2, 0, 0, 1);
    border: 1px solid rgba(196, 30, 58, 0.08);
    display: flex;
    flex-direction: column;
}

.problem-section .problem-grid:hover {
    transform: translateY(-6px);
    box-shadow: 0 25px 35px -12px rgba(196, 30, 58, 0.12);
    border-color: rgba(196, 30, 58, 0.2);
}

/* 红色标题栏效果 - 利用h3创建红色区域 */
.problem-section .problem-grid h3 {
    background: #C41E3A;
    color: white;
    font-size: 1.35rem;
    font-weight: 700;
    padding: 20px 20px 16px;
    margin: 0;
    text-align: center;
    letter-spacing: 1px;
    position: relative;
}

/* 标题前的图标装饰 (使用伪元素) */
.problem-section .problem-grid h3::before {
    content: "⚠️ ";
    font-size: 1.2rem;
    margin-right: 6px;
}

/* 问题描述段落 */
.problem-section .problem-grid p {
    padding: 20px 20px 8px;
    color: #334155;
    font-size: 0.95rem;
    margin: 0;
    line-height: 1.5;
    text-align: center;
    font-weight: 500;
}

/* 白色解决方案标签 */
.problem-section .problem-grid .solution {
    display: inline-block;
    background: white;
    color: #C41E3A;
    font-weight: 700;
    font-size: 0.85rem;
    padding: 8px 16px;
    margin: 8px 20px 24px;
    border-radius: 40px;
    text-align: center;
    border: 1px solid #C41E3A;
    box-shadow: 0 2px 6px rgba(0,0,0,0.03);
    transition: all 0.2s;
    align-self: center;
}

.problem-section .problem-grid .solution::before {
    content: "✓ ";
    font-weight: 900;
    color: #00A86B;
}

.problem-section .problem-grid:hover .solution {
    background: #C41E3A;
    color: white;
    border-color: #C41E3A;
}

/* 4. 产品卡片区域的7天交付徽章增强 */
.product-card .product-badge {
    background: linear-gradient(135deg, #C41E3A 0%, #e3342f 100%);
    color: white;
    font-weight: 700;
    font-size: 0.75rem;
    padding: 6px 14px;
    border-radius: 30px;
    letter-spacing: 0.5px;
    box-shadow: 0 4px 8px rgba(196,30,58,0.2);
}

.product-card .product-badge::before {
    content: "⚡ ";
    font-size: 0.85rem;
}

/* 产品按钮组优化 */
.product-buttons {
    display: flex;
    gap: 12px;
    margin-top: 16px;
}

.product-buttons .btn-secondary,
.product-buttons .btn-primary {
    flex: 1;
    text-align: center;
    font-size: 0.85rem;
    padding: 10px 0;
}

/* 5. 为什么选择迪瑞区域表格质感 */
.delivery-compare table {
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 4px 14px rgba(0,0,0,0.03);
}

.delivery-compare th {
    background: #1e293b;
    color: white;
    font-weight: 600;
}

.highlight-row {
    background: #fff1f2;
    font-weight: 700;
    color: #C41E3A;
}

/* 技术网格卡片微调 */
.tech-item {
    background: white;
    border-radius: 20px;
    transition: all 0.2s;
}

.tech-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 30px -12px rgba(0,0,0,0.1);
}

/* 其他优势卡片 */
.other-advantages .advantage-item {
    background: white;
    border-radius: 20px;
    transition: all 0.2s;
}

.other-advantages .advantage-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 24px -8px rgba(0,0,0,0.08);
}

/* 6. 案例区域优化 */
.cases .cases-grid .case-item {
    background: white;
    border-radius: 24px;
    padding: 28px 20px;
    transition: all 0.25s;
    border: 1px solid #f0f0f0;
}

.cases .cases-grid .case-item:hover {
    transform: translateY(-5px);
    border-color: #C41E3A;
    box-shadow: 0 20px 28px -12px rgba(0,0,0,0.08);
}

.case-count {
    font-size: 2rem;
    font-weight: 800;
    color: #C41E3A;
    margin: 12px 0;
}

/* 7. FAQ 折叠面板精致化 */
.faq .faq-item {
    border-radius: 20px;
    margin-bottom: 16px;
    border: 1px solid #edf2f7;
    overflow: hidden;
    transition: all 0.2s;
}

.faq .faq-item h3 {
    background: #f9fafb;
    padding: 18px 24px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}

.faq .faq-item h3:hover {
    background: #fff0f2;
}

.faq-answer {
    padding: 0 24px 20px;
    color: #475569;
    line-height: 1.65;
}

/* 8. 新闻动态区域美化 */
.news .news-item {
    background: #ffffff;
    border-radius: 16px;
    padding: 16px 20px;
    margin-bottom: 12px;
    transition: all 0.2s;
    border-left: 4px solid #C41E3A;
    box-shadow: 0 1px 3px rgba(0,0,0,0.04);
}

.news .news-item:hover {
    transform: translateX(5px);
    box-shadow: 0 8px 18px rgba(0,0,0,0.05);
}

.news-date {
    font-weight: 600;
    color: #C41E3A;
    background: #fff0f2;
    padding: 4px 12px;
    border-radius: 40px;
    font-size: 0.75rem;
    margin-right: 16px;
}

/* 9. 底部footer细节 */
.footer {
    border-top: 1px solid rgba(255,255,255,0.05);
}

.footer a:hover {
    color: #C41E3A;
    text-decoration: underline;
}

/* 10. 响应式微调 */
@media (max-width: 768px) {
    .problem-section .pain-grid {
        grid-template-columns: 1fr;
    }
    
    .factory-showcase h2 {
        font-size: 24px;
    }
    
    .product-buttons {
        flex-direction: column;
    }
    
    .hero-banner .hero-content h1 {
        font-size: 28px;
    }
    
    .advantage-flow {
        font-size: 12px;
        gap: 6px;
        flex-wrap: wrap;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    
    .problem-section .problem-grid .solution {
        font-size: 0.75rem;
        margin: 6px 16px 18px;
    }
}

/* 11. 按钮统一悬浮效果增强 */
.btn-primary, .btn-secondary {
    transition: all 0.2s ease;
}

.btn-primary:active, .btn-secondary:active {
    transform: scale(0.97);
}

/* 12. 浮动咨询按钮圆润处理 */
.float-consult .consult-phone {
    background: #C41E3A;
    box-shadow: 0 8px 20px rgba(196,30,58,0.35);
}

.float-consult .consult-phone:hover {
    transform: scale(1.1);
    background: #a01830;
}

/* 13. 针对首屏banner的7天交付高亮 */
.hero-advantage .advantage-compare .compare-highlight {
    background: linear-gradient(120deg, #fff3cd, #ffeaa7);
    padding: 4px 12px;
    border-radius: 40px;
    font-weight: 800;
}

/* 14. 所有标题统一增加下划线点缀 */
.products h2, .why-choose h2, .cases h2, .faq h2, .news h2, .problem-section h2 {
    position: relative;
    display: inline-block;
    width: 100%;
    text-align: center;
}

.products h2::after, .why-choose h2::after, .cases h2::after, 
.faq h2::after, .news h2::after, .problem-section h2::after {
    content: '';
    display: block;
    width: 70px;
    height: 3px;
    background: #C41E3A;
    margin: 12px auto 0;
    border-radius: 3px;
}
/* ===== 产品卡片样式 - 红色标题栏“7天交付” ===== */
/* 在不修改HTML结构的前提下，通过CSS为每个产品卡片顶部增加红色标题栏 */

.products .product-card {
    position: relative;
    background: #ffffff;
    border-radius: 20px;
    overflow: hidden;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.06);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
}

.products .product-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 20px 35px -10px rgba(196, 30, 58, 0.15);
}

/* 红色标题栏 - 使用伪元素创建顶部红色区域 */
.products .product-card::before {
    content: "⚡⚡ 标准型号7天交付";
    display: block;
    background: linear-gradient(135deg, #C41E3A 0%, #A01830 100%);
    color: white;
    font-size: 1rem;
    font-weight: 700;
    text-align: center;
    padding: 14px 0;
    letter-spacing: 1px;
    position: relative;
    z-index: 2;
}

/* 隐藏原有的 product-badge 徽章（避免重复） */
.products .product-card .product-badge {
    display: none;
}

/* 产品图片区域微调 */
.products .product-image {
    background: #f5f7fa;
    padding: 24px;
    text-align: center;
    border-bottom: 1px solid #eee;
}

.products .product-image img {
    max-width: 100%;
    height: auto;
    max-height: 160px;
    object-fit: contain;
}

/* 产品内容区域 */
.products .product-content {
    padding: 24px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.products .product-content h3 {
    font-size: 1.4rem;
    font-weight: 700;
    color: #1a1a2e;
    margin-bottom: 12px;
    border-left: 4px solid #C41E3A;
    padding-left: 12px;
}

.products .product-content > p {
    font-size: 0.9rem;
    color: #475569;
    line-height: 1.5;
    margin-bottom: 16px;
}

/* 产品特性列表 */
.products .product-features {
    list-style: none;
    margin: 0 0 20px 0;
    padding: 0;
}

.products .product-features li {
    font-size: 0.85rem;
    color: #334155;
    padding: 6px 0;
    display: flex;
    align-items: center;
    gap: 8px;
    border-bottom: 1px dashed #f0f0f0;
}

.products .product-features li:last-child {
    border-bottom: none;
}

.products .product-features li span {
    font-weight: 600;
}

/* 按钮区域 */
.products .product-buttons {
    display: flex;
    gap: 12px;
    margin-top: auto;
    padding-top: 16px;
}

.products .product-buttons .btn-secondary,
.products .product-buttons .btn-primary {
    flex: 1;
    text-align: center;
    padding: 10px 0;
    font-size: 0.85rem;
    border-radius: 40px;
}

.products .product-buttons .btn-secondary {
    background: white;
    border: 1.5px solid #C41E3A;
    color: #C41E3A;
}

.products .product-buttons .btn-secondary:hover {
    background: #C41E3A;
    color: white;
}

.products .product-buttons .btn-primary {
    background: #C41E3A;
    color: white;
    border: none;
}

.products .product-buttons .btn-primary:hover {
    background: #A01830;
    transform: translateY(-2px);
}

/* 响应式调整 */
@media (max-width: 768px) {
    .products .product-card::before {
        font-size: 0.9rem;
        padding: 12px 0;
    }
    
    .products .product-content h3 {
        font-size: 1.2rem;
    }
    
    .products .product-buttons {
        flex-direction: column;
        gap: 10px;
    }
}

@media (max-width: 480px) {
    .products .product-content {
        padding: 18px;
    }
    
    .products .product-features li {
        font-size: 0.8rem;
    }
}






/* ===== 联系我们页面样式修复与增强 ===== */

/* 联系表单区域间距优化 */
.contact-section {
    padding: 70px 0;
}

.contact-grid {
    gap: 48px;
}

/* 联系方式卡片悬浮效果增强 */
.contact-info {
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.contact-info:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1);
}

/* 表单项悬浮效果 */
.form-group input:hover,
.form-group select:hover,
.form-group textarea:hover {
    border-color: #cbd5e1;
}

/* 复选框组优化 */
.form-group div[style*="display:flex"] label {
    cursor: pointer;
    user-select: none;
}

.form-group input[type="checkbox"] {
    cursor: pointer;
}

/* 提交按钮点击反馈 */
.form-submit .btn-primary:active {
    transform: translateY(0px);
}

/* 服务流程步骤动画 */
.process-step {
    transition: all 0.3s cubic-bezier(0.2, 0.9, 0.4, 1.1);
}

.process-step:hover .step-number {
    transform: scale(1.1);
    transition: transform 0.2s ease;
}

/* 服务承诺卡片图标增强 */
.advantage-item h3 {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

/* FAQ展开动画优化 */
.faq-item {
    transition: all 0.3s ease;
}

.faq-item h3 {
    position: relative;
    padding-right: 50px;
}

.faq-item h3::after {
    content: '+';
    position: absolute;
    right: 24px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.4rem;
    color: #C41E3A;
    font-weight: 700;
    transition: transform 0.3s ease;
}

.faq-item.active h3::after {
    transform: translateY(-50%) rotate(45deg);
}

/* 地图区域美化 */
.cases > .container > div {
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%) !important;
    border: 1px solid #eef2f6;
    transition: all 0.3s ease;
}

.cases > .container > div:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.1) !important;
}

/* 浮动咨询按钮位置优化 */
.float-consult {
    right: 24px;
    bottom: 120px;
}

/* 响应式补充 */
@media (max-width: 768px) {
    .contact-section {
        padding: 50px 0;
    }
    
    .contact-grid {
        gap: 32px;
    }
    
    .contact-info, .contact-form {
        padding: 24px;
    }
    
    .process-step {
        min-width: calc(50% - 16px);
        padding: 20px 12px;
    }
    
    .step-number {
        width: 40px;
        height: 40px;
        font-size: 1.2rem;
    }
    
    .float-consult {
        right: 16px;
        bottom: 100px;
    }
    
    .float-consult .consult-online {
        padding: 8px 16px;
        font-size: 0.8rem;
    }
}

@media (max-width: 480px) {
    .page-banner h1 {
        font-size: 1.5rem;
    }
    
    .page-banner p {
        font-size: 0.9rem;
    }
    
    .contact-item {
        flex-direction: column;
        align-items: center;
        text-align: center;
        gap: 12px;
    }
    
    .contact-icon {
        margin-right: 0;
    }
    
    .form-group div[style*="display:flex"] {
        justify-content: center;
    }
    
    .process-step {
        min-width: 100%;
    }
    
    .why-choose .advantage-item {
        padding: 20px 16px;
    }
}

/* 打印样式优化 */
@media print {
    .navbar,
    .float-consult,
    .footer {
        display: none;
    }
    
    .contact-section {
        padding: 20px 0;
    }
    
    .contact-grid {
        display: block;
    }
    
    .contact-form {
        page-break-before: avoid;
    }
}

/* 平滑滚动增强 */
html {
    scroll-behavior: smooth;
}

/* 焦点可见性优化 */
:focus-visible {
    outline: 2px solid #C41E3A;
    outline-offset: 2px;
    border-radius: 4px;
}

/* 加载动画（可选） */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.contact-section,
.service-process,
.why-choose,
.faq,
.cases {
    animation: fadeInUp 0.5s ease forwards;
}




/* ===== 工程案例页面专属美化样式 ===== */

/* 1. 页面Banner优化 - 与首页风格统一 */
.page-banner {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    padding: 100px 0 60px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.page-banner::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 300px;
    height: 300px;
    background: rgba(196, 30, 58, 0.15);
    border-radius: 50%;
    pointer-events: none;
}

.page-banner::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 250px;
    height: 250px;
    background: rgba(196, 30, 58, 0.1);
    border-radius: 50%;
    pointer-events: none;
}

.page-banner h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: white;
    position: relative;
    z-index: 1;
}

.page-banner p {
    font-size: 1.1rem;
    color: rgba(255,255,255,0.85);
    position: relative;
    z-index: 1;
}

/* 2. 核心数据统计区域美化 */
.cases-stats {
    padding: 60px 0;
    background: linear-gradient(135deg, #f8fafc 0%, #ffffff 100%);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.stat-card {
    background: white;
    padding: 32px 24px;
    border-radius: 24px;
    text-align: center;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    border: 1px solid rgba(196, 30, 58, 0.08);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, #C41E3A, #e67e22);
    transform: scaleX(0);
    transition: transform 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 20px 40px rgba(196, 30, 58, 0.12);
    border-color: rgba(196, 30, 58, 0.2);
}

.stat-card:hover::before {
    transform: scaleX(1);
}

.stat-card .stat-number {
    font-size: 3rem;
    font-weight: 800;
    color: #C41E3A;
    line-height: 1.2;
    margin-bottom: 8px;
}

.stat-card .stat-label {
    font-size: 1.1rem;
    font-weight: 600;
    color: #1e293b;
    margin-bottom: 8px;
}

.stat-card .stat-desc {
    font-size: 0.85rem;
    color: #64748b;
}

/* 3. 案例分类区域卡片美化 */
.case-category {
    padding: 60px 0;
    border-bottom: 1px solid #eef2f6;
}

.case-category:last-of-type {
    border-bottom: none;
}

.case-category:nth-child(even) {
    background: #f8fafc;
}

.category-header {
    text-align: center;
    margin-bottom: 40px;
}

.category-header h2 {
    font-size: 1.8rem;
    font-weight: 700;
    color: #1e293b;
    margin-bottom: 12px;
    position: relative;
    display: inline-block;
}

.category-header h2::after {
    content: '';
    position: absolute;
    bottom: -12px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, #C41E3A, #e67e22);
    border-radius: 3px;
}

.category-subtitle {
    font-size: 1rem;
    color: #64748b;
    margin-top: 20px;
}

.case-info-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.case-info-item {
    background: white;
    padding: 28px;
    border-radius: 20px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.04);
    transition: all 0.3s ease;
    border: 1px solid #eef2f6;
}

.case-info-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.08);
    border-color: rgba(196, 30, 58, 0.15);
}

.case-info-item h3 {
    font-size: 1.3rem;
    font-weight: 700;
    color: #C41E3A;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 2px solid #C41E3A;
    display: inline-block;
}

.case-info-item ul {
    list-style: none;
}

.case-info-item ul li {
    padding: 10px 0;
    font-size: 0.95rem;
    color: #475569;
    border-bottom: 1px dashed #eef2f6;
    line-height: 1.5;
}

.case-info-item ul li:last-child {
    border-bottom: none;
}

.case-info-item ul li strong {
    color: #1e293b;
}

/* 4. 典型案例详情卡片 */
.case-details {
    padding: 70px 0;
    background: #f8fafc;
}

.section-header {
    text-align: center;
    margin-bottom: 50px;
}

.section-header h2 {
    font-size: 2rem;
    font-weight: 700;
    color: #1e293b;
    margin-bottom: 12px;
    position: relative;
    display: inline-block;
}

.section-header h2::after {
    content: '';
    position: absolute;
    bottom: -12px;
    left: 50%;
    transform: translateX(-50%);
    width: 70px;
    height: 3px;
    background: #C41E3A;
    border-radius: 3px;
}

.section-header p {
    font-size: 1rem;
    color: #64748b;
    margin-top: 20px;
}

.case-detail-card {
    background: white;
    border-radius: 24px;
    overflow: hidden;
    margin-bottom: 40px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.case-detail-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.case-detail-header {
    background: linear-gradient(135deg, #C41E3A 0%, #A01830 100%);
    padding: 20px 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
}

.case-detail-header h3 {
    font-size: 1.4rem;
    font-weight: 700;
    color: white;
    margin: 0;
}

.case-tag {
    background: rgba(255,255,255,0.2);
    color: white;
    padding: 6px 16px;
    border-radius: 40px;
    font-size: 0.85rem;
    font-weight: 500;
}

.case-detail-content {
    padding: 30px;
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 30px;
}

.case-info {
    background: #f8fafc;
    padding: 20px;
    border-radius: 16px;
}

.info-item {
    display: flex;
    padding: 12px 0;
    border-bottom: 1px solid #e2e8f0;
}

.info-item:last-child {
    border-bottom: none;
}

.info-item .label {
    width: 100px;
    font-weight: 600;
    color: #1e293b;
}

.info-item .value {
    flex: 1;
    color: #475569;
}

.case-description h4 {
    font-size: 1.1rem;
    font-weight: 700;
    color: #C41E3A;
    margin: 16px 0 8px;
}

.case-description h4:first-of-type {
    margin-top: 0;
}

.case-description p {
    color: #475569;
    line-height: 1.7;
    margin-bottom: 16px;
}

/* 5. FAQ区域美化 */
.faq-section {
    padding: 70px 0;
    background: white;
}

.faq-section .faq-list {
    max-width: 900px;
    margin: 0 auto;
}

.faq-section .faq-item {
    background: #f8fafc;
    border-radius: 20px;
    margin-bottom: 16px;
    border: 1px solid #eef2f6;
    transition: all 0.3s ease;
    overflow: hidden;
}

.faq-section .faq-item:hover {
    border-color: rgba(196, 30, 58, 0.3);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.faq-question {
    padding: 20px 28px;
    font-size: 1rem;
    font-weight: 600;
    color: #1e293b;
    cursor: pointer;
    list-style: none;
    position: relative;
    transition: background 0.2s;
}

.faq-question::-webkit-details-marker {
    display: none;
}

.faq-question::after {
    content: '+';
    position: absolute;
    right: 28px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.3rem;
    color: #C41E3A;
    font-weight: 700;
    transition: transform 0.3s;
}

.faq-item[open] .faq-question::after {
    transform: translateY(-50%) rotate(45deg);
}

.faq-question:hover {
    background: #fff0f2;
}

.faq-answer {
    padding: 0 28px 24px;
    border-top: 1px solid #eef2f6;
}

.faq-answer p {
    font-size: 0.95rem;
    color: #475569;
    line-height: 1.7;
    margin-bottom: 12px;
}

.faq-answer ul {
    margin: 10px 0 10px 20px;
}

.faq-answer li {
    font-size: 0.9rem;
    color: #475569;
    margin: 6px 0;
}

.faq-answer strong {
    color: #C41E3A;
}

/* 6. CTA区域美化 */
.cta-section {
    padding: 70px 0;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 100%);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.cta-section::before {
    content: '';
    position: absolute;
    top: -30%;
    right: -10%;
    width: 300px;
    height: 300px;
    background: rgba(196, 30, 58, 0.1);
    border-radius: 50%;
    pointer-events: none;
}

.cta-content h2 {
    font-size: 2rem;
    font-weight: 700;
    color: white;
    margin-bottom: 16px;
    position: relative;
    z-index: 1;
}

.cta-content p {
    font-size: 1.1rem;
    color: rgba(255,255,255,0.85);
    margin-bottom: 30px;
    position: relative;
    z-index: 1;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
    position: relative;
    z-index: 1;
}

.cta-buttons .btn-primary {
    background: #C41E3A;
    color: white;
    padding: 14px 32px;
    border-radius: 40px;
    font-size: 1rem;
    font-weight: 600;
    transition: all 0.3s;
}

.cta-buttons .btn-primary:hover {
    background: #A01830;
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(196, 30, 58, 0.4);
}

.cta-buttons .btn-secondary {
    background: transparent;
    border: 2px solid white;
    color: white;
    padding: 12px 28px;
    border-radius: 40px;
    font-size: 1rem;
    font-weight: 500;
    transition: all 0.3s;
}

.cta-buttons .btn-secondary:hover {
    background: rgba(255,255,255,0.1);
    transform: translateY(-3px);
}

/* 7. 响应式适配 */
@media (max-width: 992px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    
    .case-info-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .case-detail-content {
        grid-template-columns: 1fr;
        gap: 20px;
    }
}

@media (max-width: 768px) {
    .page-banner {
        padding: 80px 0 50px;
    }
    
    .page-banner h1 {
        font-size: 1.8rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .stat-card {
        padding: 24px;
    }
    
    .category-header h2 {
        font-size: 1.5rem;
    }
    
    .case-detail-header {
        flex-direction: column;
        text-align: center;
        padding: 20px;
    }
    
    .case-detail-header h3 {
        font-size: 1.2rem;
    }
    
    .case-detail-content {
        padding: 20px;
    }
    
    .info-item {
        flex-direction: column;
    }
    
    .info-item .label {
        width: auto;
        margin-bottom: 4px;
    }
    
    .faq-question {
        padding: 16px 20px;
        font-size: 0.9rem;
    }
    
    .faq-question::after {
        right: 20px;
    }
    
    .faq-answer {
        padding: 0 20px 20px;
    }
    
    .cta-content h2 {
        font-size: 1.5rem;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .cta-buttons .btn-primary,
    .cta-buttons .btn-secondary {
        width: 80%;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .page-banner h1 {
        font-size: 1.4rem;
    }
    
    .stat-card .stat-number {
        font-size: 2.5rem;
    }
    
    .case-info-item {
        padding: 20px;
    }
    
    .case-info-item h3 {
        font-size: 1.1rem;
    }
}

/* 8. 面包屑导航美化 */
.breadcrumb {
    background: #f8fafc;
    padding: 14px 0;
    border-bottom: 1px solid #eef2f6;
}

.breadcrumb a {
    color: #475569;
    transition: color 0.2s;
}

.breadcrumb a:hover {
    color: #C41E3A;
}

.breadcrumb span {
    color: #94a3b8;
    margin: 0 8px;
}

/* 9. 浮动按钮美化 */
.float-buttons {
    position: fixed;
    right: 24px;
    bottom: 100px;
    z-index: 999;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.float-btn {
    width: 52px;
    height: 52px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    transition: all 0.3s;
    cursor: pointer;
    border: none;
    text-decoration: none;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
}

.float-phone {
    background: #C41E3A;
    color: white;
}

.float-phone:hover {
    background: #A01830;
    transform: scale(1.1);
}

.float-top {
    background: #334155;
    color: white;
}

.float-top:hover {
    background: #C41E3A;
    transform: scale(1.1);
}

.cases-stats h2 {
    text-align: center;
    font-size: 32px;
    color: #1a1a2e;
    margin-bottom: 50px;
}

/* 10. 页面淡入动画 */
.cases-stats,
.case-category,
.case-details,
.faq-section,
.cta-section {
    animation: fadeInUp 0.6s ease forwards;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 延迟动画 */
.case-category:nth-child(1) { animation-delay: 0.05s; }
.case-category:nth-child(2) { animation-delay: 0.1s; }
.case-category:nth-child(3) { animation-delay: 0.15s; }
.case-category:nth-child(4) { animation-delay: 0.2s; }

/* ========== AI智能型号推荐区域 ========== */
.ai-recommendation {
    padding: 80px 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

.ai-section-header {
    text-align: center;
    margin-bottom: 50px;
}

.ai-badge {
    display: inline-block;
    background: linear-gradient(135deg, #C41E3A 0%, #A01830 100%);
    color: #ffffff;
    padding: 8px 20px;
    border-radius: 25px;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 20px;
}

.ai-section-header h2 {
    font-size: 36px;
    font-weight: 700;
    color: #1a1a2e;
    margin-bottom: 15px;
}

.ai-section-header p {
    font-size: 18px;
    color: #666;
    max-width: 600px;
    margin: 0 auto;
}

.ai-selection-form {
    max-width: 800px;
    margin: 0 auto;
    background: #ffffff;
    padding: 40px;
    border-radius: 16px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

.ai-selection-form .form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

.ai-selection-form .form-group {
    display: flex;
    flex-direction: column;
}

.ai-selection-form .form-group.full-width {
    grid-column: 1 / -1;
}

.ai-selection-form label {
    font-size: 14px;
    font-weight: 600;
    color: #333;
    margin-bottom: 8px;
}

.ai-selection-form .required {
    color: #C41E3A;
}

.ai-selection-form input,
.ai-selection-form select,
.ai-selection-form textarea {
    padding: 14px 16px;
    border: 2px solid #e2e8f0;
    border-radius: 8px;
    font-size: 15px;
    transition: all 0.3s ease;
    font-family: inherit;
}

.ai-selection-form input:focus,
.ai-selection-form select:focus,
.ai-selection-form textarea:focus {
    outline: none;
    border-color: #C41E3A;
    box-shadow: 0 0 0 3px rgba(196, 30, 58, 0.1);
}

.ai-selection-form .btn-large {
    width: 100%;
    padding: 18px 32px;
    font-size: 18px;
    margin-top: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.btn-icon {
    font-size: 22px;
}

/* AI推荐结果区域 */
.ai-recommendation-result {
    max-width: 800px;
    margin: 40px auto 0;
    background: #ffffff;
    padding: 40px;
    border-radius: 16px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
    border: 2px solid #C41E3A;
    animation: fadeInUp 0.5s ease;
}

.result-header {
    text-align: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 2px solid #f0f0f0;
}

.result-header h3 {
    font-size: 24px;
    color: #C41E3A;
    margin-bottom: 10px;
}

.result-header p {
    color: #666;
    font-size: 15px;
}

.recommendation-content {
    margin-bottom: 30px;
}

.recommendation-item {
    background: #f8f9fa;
    padding: 25px;
    border-radius: 12px;
    margin-bottom: 20px;
    border-left: 4px solid #C41E3A;
}

.recommendation-item h4 {
    font-size: 20px;
    color: #1a1a2e;
    margin-bottom: 15px;
}

.recommendation-item .product-specs {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    margin: 15px 0;
}

.recommendation-item .spec-item {
    display: flex;
    justify-content: space-between;
    padding: 8px 0;
    border-bottom: 1px dashed #ddd;
}

.recommendation-item .spec-label {
    color: #666;
    font-size: 14px;
}

.recommendation-item .spec-value {
    color: #333;
    font-weight: 600;
    font-size: 14px;
}

.recommendation-reason {
    background: #fff3cd;
    padding: 15px;
    border-radius: 8px;
    margin-top: 15px;
}

.recommendation-reason h5 {
    color: #856404;
    font-size: 14px;
    margin-bottom: 8px;
}

.recommendation-reason p {
    color: #856404;
    font-size: 14px;
    line-height: 1.6;
}

.recommendation-actions {
    display: flex;
    gap: 15px;
    justify-content: center;
}

/* 响应式调整 */
@media (max-width: 768px) {
    .ai-selection-form .form-row {
        grid-template-columns: 1fr;
    }
    
    .ai-section-header h2 {
        font-size: 28px;
    }
    
    .ai-selection-form,
    .ai-recommendation-result {
        padding: 25px;
    }
    
    .recommendation-actions {
        flex-direction: column;
    }
}