* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
    color: #333;
    line-height: 1.6;
}

/* 顶部导航 */
.top-bar {
    background: #f5f5f5;
    padding: 8px 0;
    font-size: 12px;
    color: #666;
}

.top-bar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.top-bar a {
    color: #666;
    text-decoration: none;
    margin: 0 10px;
}

.top-bar a:hover {
    color: #e60012;
}

.main-nav {
    background: #fff;
    padding: 15px 0;
    border-bottom: 1px solid #eee;
}

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

.logo {
    font-size: 24px;
    font-weight: bold;
    color: #e60012;
}

.nav-links {
    display: flex;
    gap: 30px;
}

.nav-links a {
    color: #333;
    text-decoration: none;
    font-size: 14px;
}

.nav-links a:hover {
    color: #e60012;
}

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

/* 面包屑 */
.breadcrumb {
    padding: 15px 0;
    font-size: 12px;
    color: #999;
}

.breadcrumb a {
    color: #999;
    text-decoration: none;
}

.breadcrumb a:hover {
    color: #e60012;
}

/* 英雄区 */
.hero {
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    padding: 80px 0;
    color: #fff;
}

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

.hero-content {
    max-width: 500px;
}

.hero-content h1 {
    font-size: 48px;
    font-weight: 300;
    margin-bottom: 10px;
    letter-spacing: 2px;
}

.hero-content h2 {
    font-size: 28px;
    font-weight: 300;
    margin-bottom: 30px;
    color: #ccc;
}

.hero-btn {
    display: inline-block;
    background: #e60012;
    color: #fff;
    padding: 12px 30px;
    text-decoration: none;
    border-radius: 4px;
    font-size: 14px;
    transition: background 0.3s;
}

.hero-btn:hover {
    background: #c00010;
}

.hero-image {
    max-width: 450px;
}

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

/* 通用区块 */
.section {
    padding: 60px 0;
}

.section-title {
    font-size: 28px;
    color: #333;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 15px;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 3px;
    background: #e60012;
}

.section-desc {
    color: #666;
    font-size: 14px;
    line-height: 1.8;
    margin-bottom: 20px;
}

/* 客户评价 */
.reviews {
    background: #f9f9f9;
}

.review-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 40px;
}

.review-item {
    display: flex;
    align-items: flex-start;
    gap: 15px;
}

.review-icon {
    width: 40px;
    height: 40px;
    background: #e60012;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 18px;
    flex-shrink: 0;
}

.review-text {
    font-size: 14px;
    color: #333;
}

/* 产品系列 */
.product-list {
    margin: 30px 0;
}

.product-list h3 {
    font-size: 16px;
    color: #333;
    margin-bottom: 15px;
    padding-left: 15px;
    border-left: 3px solid #e60012;
}

.product-list ul {
    list-style: none;
    padding-left: 20px;
}

.product-list li {
    padding: 5px 0;
    color: #666;
    font-size: 14px;
}

.product-list li::before {
    content: '•';
    color: #e60012;
    margin-right: 10px;
}

/* 产品详情 */
.product-detail {
    background: #fff;
    padding: 40px 0;
    border-bottom: 1px solid #eee;
}

.product-detail h3 {
    font-size: 18px;
    color: #333;
    margin-bottom: 20px;
}

.product-detail p {
    color: #666;
    font-size: 14px;
    line-height: 1.8;
    margin-bottom: 10px;
}

.product-detail ul {
    list-style: none;
    padding-left: 20px;
}

.product-detail li {
    padding: 5px 0;
    color: #666;
    font-size: 14px;
}

.product-detail li::before {
    content: '•';
    color: #e60012;
    margin-right: 10px;
}

/* 市场和应用 */
.application-grid {
    display: flex;
    gap: 60px;
    margin-top: 30px;
}

.application-column {
    flex: 1;
}

.application-column h3 {
    font-size: 16px;
    color: #333;
    margin: 20px 0 10px;
    font-weight: 600;
}

.application-column h3:first-child {
    margin-top: 0;
}

.application-column ul {
    list-style: none;
    padding-left: 0;
}

.application-column li {
    padding: 4px 0;
    color: #666;
    font-size: 14px;
    padding-left: 15px;
    position: relative;
}

.application-column li::before {
    content: '■';
    color: #666;
    font-size: 8px;
    position: absolute;
    left: 0;
    top: 6px;
}

/* 解决方案 */
.solution {
    background: #f9f9f9;
}

.solution-content {
    display: flex;
    gap: 40px;
    align-items: flex-start;
}

.solution-text {
    flex: 1;
}

.solution-image {
    flex: 0 0 400px;
}

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

.solution-text ul {
    list-style: none;
    padding-left: 0;
}

.solution-text li {
    padding: 8px 0;
    color: #666;
    font-size: 14px;
    padding-left: 20px;
    position: relative;
}

.solution-text li::before {
    content: '•';
    color: #e60012;
    position: absolute;
    left: 0;
}

/* 标签 */
.tabs {
    display: flex;
    gap: 0;
    margin: 30px 0;
}

.tab {
    padding: 10px 25px;
    background: #eee;
    color: #666;
    font-size: 14px;
    cursor: pointer;
    border: none;
    transition: all 0.3s;
}

.tab:first-child {
    border-radius: 4px 0 0 4px;
}

.tab:last-child {
    border-radius: 0 4px 4px 0;
}

.tab.active {
    background: #e60012;
    color: #fff;
}

/* 规格表格 */
.specs-table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 30px;
    font-size: 13px;
}

.specs-table th,
.specs-table td {
    padding: 12px 15px;
    border: 1px solid #ddd;
    text-align: center;
}

.specs-table th {
    background: #f5f5f5;
    color: #333;
    font-weight: 600;
}

.specs-table td {
    color: #666;
}

.specs-table tr:nth-child(even) {
    background: #fafafa;
}

.specs-table tr:hover {
    background: #f0f0f0;
}

.specs-table td:first-child {
    text-align: left;
    background: #f9f9f9;
    color: #333;
}

/* 页脚 */
.footer {
    background: #333;
    color: #999;
    padding: 40px 0;
    font-size: 13px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
}

.footer-links a {
    color: #999;
    text-decoration: none;
    margin-right: 20px;
}

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

/* 占位图片样式 */
.placeholder-img {
    background: linear-gradient(135deg, #e0e0e0 0%, #f5f5f5 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #999;
    font-size: 14px;
}

.hero-placeholder {
    width: 450px;
    height: 300px;
    border-radius: 8px;
}

.solution-placeholder {
    width: 400px;
    height: 280px;
    border-radius: 8px;
}

/* 产品图片占位 */
.product-img-row {
    display: flex;
    gap: 30px;
    margin: 30px 0;
}

.product-img-item {
    flex: 1;
}

.product-img-item img {
    width: 100%;
    height: 250px;
    object-fit: cover;
    border-radius: 8px;
}

.product-img-placeholder {
    width: 100%;
    height: 200px;
    border-radius: 8px;
}

/* 响应式 */
@media (max-width: 768px) {
    .hero .container {
        flex-direction: column;
        text-align: center;
    }

    .hero-content h1 {
        font-size: 32px;
    }

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

    .solution-content {
        flex-direction: column;
    }

    .solution-image {
        flex: none;
        width: 100%;
    }

    .specs-table {
        font-size: 11px;
    }

    .specs-table th,
    .specs-table td {
        padding: 8px 5px;
    }
}