:root {
    --primary: #090303;
    --secondary: #1e5799;
    --accent: #efcd2e;
    --light: #f5f6fa;
    --dark: #1e272e;
    --gray: #485460;
    --success: #05c46b;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: #f0f4f8;
    color: #333;
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 头部样式 */
header {
   /* background: linear-gradient(135deg, var(--primary), var(--secondary)); */
    color: white;
    background-color: rgba(238, 238, 238, 0.2);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

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

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

.logo img {
    height: 50px;
    margin-right: 15px;
}

.logo h1 {
    font-size: 1.8rem;
    font-weight: 700;
}

.logo span {
    color: var(--accent);
}

nav ul {
    display: flex;
    list-style: none;
}

nav ul li {
    margin: 0 15px;
}

nav ul li a {
    color: white;
    text-decoration: none;
    font-weight: 500;
    font-size: 1.1rem;
    padding: 8px 15px;
    border-radius: 4px;
    transition: all 0.3s ease;
}

nav ul li a:hover,
nav ul li a.active {
    background: rgba(255, 255, 255, 0.15);
}

.cta-button {
    background-color: var(--accent);
    color: var(--dark);
    border: none;
    padding: 10px 25px;
    border-radius: 30px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 1rem;
    text-decoration: none;
    display: inline-block;
}

.cta-button:hover {
    background-color: white;
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(75, 207, 250, 0.4);
}

/* 英雄区域 */
.hero {
    background: linear-gradient(rgba(10, 61, 98, 0.85), rgba(10, 61, 98, 0.9)), url('../images/tt.jpg') center/cover;
    color: white;
    height: 800px;
    text-align: center;
    position: relative;
}

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

.hero h2 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    font-weight: 800;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.hero p {
    font-size: 1.3rem;
    margin-bottom: 35px;
    opacity: 0.9;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 30px;
}

.btn-secondary {
    background: transparent;
    color: white;
    border: 2px solid white;
}

.btn-secondary:hover {
    background: white;
    color: var(--primary);
}

/* 产品类别 */
.section {
    padding: 80px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 60px;
}

.section-title h2 {
    font-size: 2.5rem;
    color: var(--primary);
    position: relative;
    display: inline-block;
    margin-bottom: 15px;
}

.section-title h2:after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 70px;
    height: 4px;
    background: var(--accent);
    border-radius: 2px;
}

.section-title p {
    color: var(--gray);
    max-width: 700px;
    margin: 20px auto 0;
    font-size: 1.1rem;
}

.categories {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 50px;
}

.category-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    transition: all 0.4s ease;
    text-align: center;
    padding: 30px 25px;
    position: relative;
    z-index: 1;
}

.category-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.category-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--secondary), var(--accent));
    margin: 0 auto 25px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 30px;
    color: white;
}

.category-card h3 {
    font-size: 1.6rem;
    color: var(--primary);
    margin-bottom: 15px;
}

.category-card p {
    color: var(--gray);
    margin-bottom: 20px;
}

/* 产品展示 */
.products {
    background-color: var(--light);
}

.product-filters {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 15px;
    margin-bottom: 40px;
}

.filter-btn {
    padding: 10px 25px;
    border: none;
    background: white;
    border-radius: 30px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.08);
}

.filter-btn.active, .filter-btn:hover {
    background: var(--accent);
    color: var(--dark);
}

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

.product-card {
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.06);
    transition: all 0.3s ease;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 25px rgba(0, 0, 0, 0.1);
}

.product-img {
    height: 280px;
    background: linear-gradient(45deg, #e0e0e0, #f5f5f5);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.product-img img {
    max-width: 100%;
    transition: transform 0.5s ease;
}

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

.product-tag {
    position: absolute;
    top: 15px;
    right: 15px;
    background: var(--success);
    color: white;
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
}

.product-info {
    padding: 25px;
}

.product-info h3 {
    font-size: 1.4rem;
    color: var(--primary);
    margin-bottom: 10px;
}

.product-specs {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin: 15px 0;
}

.spec-item {
    display: flex;
    align-items: center;
    font-size: 0.9rem;
    color: var(--gray);
}

.spec-item i {
    margin-right: 8px;
    color: var(--accent);
}

.product-price {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 20px;
    padding-top: 20px;
    border-top: 1px solid #eee;
}

.price {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--primary);
}

.price span {
    font-size: 1rem;
    color: var(--gray);
    font-weight: 400;
    text-decoration: line-through;
    margin-left: 8px;
}

/* 解决方案 */
.solutions {
    position: relative;
}

.solution-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
}

.solution-img {
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.solution-img img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.5s ease;
}

.solution-img:hover img {
    transform: scale(1.05);
}

.solution-content h3 {
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: 25px;
}

.solution-content ul {
    list-style: none;
    margin: 25px 0;
}

.solution-content ul li {
    margin-bottom: 15px;
    padding-left: 35px;
    position: relative;
}

.solution-content ul li:before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 20px;
    height: 20px;
    background: var(--accent);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 12px;
    font-weight: bold;
}

/* 合作伙伴 */
.partners {
    background-color: var(--light);
}

.partner-logos {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 40px;
    margin-top: 40px;
}

.partner-logo {
    height: 60px;
    filter: grayscale(100%);
    opacity: 0.6;
    transition: all 0.3s ease;
}

.partner-logo:hover {
    filter: grayscale(0);
    opacity: 1;
}

/* 页脚 */
footer {
    background: linear-gradient(to right, var(--primary), var(--dark));
    color: white;
    padding: 70px 0 30px;
}

.footer-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
}

.footer-col h4 {
    font-size: 1.3rem;
    margin-bottom: 25px;
    position: relative;
    padding-bottom: 10px;
}

.footer-col h4:after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 3px;
    background: var(--accent);
}

.footer-col ul {
    list-style: none;
}

.footer-col ul li {
    margin-bottom: 15px;
}

.footer-col ul li a {
    color: #ccc;
    text-decoration: none;
    transition: all 0.3s ease;
    display: block;
}

.footer-col ul li a:hover {
    color: white;
    padding-left: 5px;
}

.footer-contact p {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
    color: #ccc;
}

.footer-contact i {
    margin-right: 15px;
    color: var(--accent);
    font-size: 1.2rem;
    width: 20px;
}

.social-links {
    display: flex;
    gap: 15px;
    margin-top: 20px;
}

.social-links a {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: white;
    transition: all 0.3s ease;
}

.social-links a:hover {
    background: var(--accent);
    transform: translateY(-3px);
}

.copyright {
    text-align: center;
    padding-top: 30px;
    margin-top: 50px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #aaa;
    font-size: 0.9rem;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .solution-container {
        grid-template-columns: 1fr;
    }

    .hero h2 {
        font-size: 2.8rem;
    }
}

@media (max-width: 768px) {
    nav ul {
        display: none;
    }

    .hero h2 {
        font-size: 2.3rem;
    }

    .hero p {
        font-size: 1.1rem;
    }

    .hero-buttons {
        flex-direction: column;
        gap: 15px;
    }

    .header-container {
        flex-wrap: wrap;
    }

    .section {
        padding: 60px 0;
    }
}

/* 动画效果 */
@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}



/* 电路动画 */
.circuit {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    z-index: -1;
    opacity: 0.1;
}

.circuit-line {
    stroke: var(--accent);
    stroke-width: 2;
    fill: none;
    stroke-dasharray: 10;
    animation: dash 30s linear infinite;
}

@keyframes dash {
    to {
        stroke-dashoffset: 1000;
    }
}