/* ===== 全局样式 ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #0066CC;
    --secondary-color: #FF6600;
    --dark-color: #333333;
    --light-color: #666666;
    --gray-color: #f5f5f5;
    --white: #ffffff;
    --border-color: #e5e5e5;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 5px 20px rgba(0, 0, 0, 0.15);
}

body {
    font-family: 'Microsoft YaHei', 'PingFang SC', sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--dark-color);
    background-color: var(--white);
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

ul {
    list-style: none;
}

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

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

.section {
    padding: 80px 0;
}

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

.section-title h2 {
    font-size: 36px;
    margin-bottom: 15px;
    color: var(--dark-color);
}

.section-title p {
    font-size: 16px;
    color: var(--light-color);
    max-width: 600px;
    margin: 0 auto;
}

/* ===== 按钮样式 ===== */
.btn {
    display: inline-block;
    padding: 12px 30px;
    font-size: 16px;
    font-weight: 500;
    text-align: center;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s ease;
}

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

.btn-primary:hover {
    background-color: #0052a3;
    transform: translateY(-2px);
}

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

.btn-secondary:hover {
    background-color: #e65c00;
    transform: translateY(-2px);
}

.btn-outline {
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    background: transparent;
}

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

/* ===== 顶部导航 ===== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: var(--white);
    box-shadow: var(--shadow);
    z-index: 1000;
}

.top-bar {
    background-color: var(--dark-color);
    color: var(--white);
    padding: 8px 0;
    font-size: 14px;
}

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

.top-bar-left {
    display: flex;
    gap: 20px;
}

.top-bar-right a {
    color: var(--white);
    margin-left: 20px;
}

.top-bar-right a:hover {
    color: var(--secondary-color);
}

.main-nav {
    padding: 15px 0;
}

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

.nav-brand .logo {
    display: flex;
    align-items: center;
    font-size: 24px;
    font-weight: bold;
    color: var(--primary-color);
}

.nav-brand .logo i {
    margin-right: 10px;
    font-size: 32px;
}

.nav-menu {
    display: flex;
    gap: 5px;
}

.nav-menu li {
    position: relative;
}

.nav-menu li a {
    padding: 10px 20px;
    font-size: 16px;
    color: var(--dark-color);
    border-radius: 5px;
}

.nav-menu li a:hover,
.nav-menu li.active a {
    background-color: var(--primary-color);
    color: var(--white);
}

.mobile-menu-toggle {
    display: none;
    font-size: 24px;
    cursor: pointer;
}

/* ===== 移动端导航 ===== */
.mobile-nav {
    display: none;
    position: fixed;
    top: 0;
    right: -100%;
    width: 280px;
    height: 100vh;
    background-color: var(--white);
    box-shadow: -5px 0 15px rgba(0, 0, 0, 0.1);
    z-index: 1001;
    transition: right 0.3s ease;
}

.mobile-nav.active {
    right: 0;
}

.mobile-nav-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
}

.close-menu {
    font-size: 24px;
    cursor: pointer;
}

.mobile-nav-menu li a {
    display: block;
    padding: 15px 20px;
    border-bottom: 1px solid var(--border-color);
    color: var(--dark-color);
}

.mobile-nav-menu li a:hover {
    background-color: var(--gray-color);
    color: var(--primary-color);
}

/* ===== 首页轮播 ===== */
.hero {
    margin-top: 120px;
    position: relative;
    height: 600px;
    overflow: hidden;
}

.hero-slider {
    height: 100%;
    position: relative;
}

.hero-slide {
    position: absolute;
    width: 100%;
    height: 100%;
    display: none;
    background-size: cover;
    background-position: center;
}

.hero-slide.active {
    display: block;
    animation: fadeIn 1s ease-in-out;
}

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

.hero-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
    color: var(--white);
    z-index: 10;
}

.hero-content h1 {
    font-size: 48px;
    margin-bottom: 20px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.5);
}

.hero-content p {
    font-size: 20px;
    margin-bottom: 30px;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

.hero-dots {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 10px;
}

.hero-dots span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.5);
    cursor: pointer;
    transition: all 0.3s ease;
}

.hero-dots span.active {
    background-color: var(--white);
    transform: scale(1.2);
}

/* ===== 快速入口 ===== */
.quick-entry {
    margin-top: -60px;
    position: relative;
    z-index: 10;
}

.quick-entry-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.quick-entry-item {
    background-color: var(--white);
    padding: 30px;
    text-align: center;
    border-radius: 10px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    cursor: pointer;
}

.quick-entry-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.quick-entry-item i {
    font-size: 48px;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.quick-entry-item h3 {
    font-size: 20px;
    margin-bottom: 10px;
    color: var(--dark-color);
}

.quick-entry-item p {
    font-size: 14px;
    color: var(--light-color);
}

/* ===== 核心数据 ===== */
.stats {
    background-color: var(--primary-color);
    color: var(--white);
    padding: 60px 0;
}

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

.stat-item {
    text-align: center;
}

.stat-item .number {
    font-size: 48px;
    font-weight: bold;
    margin-bottom: 10px;
}

.stat-item .label {
    font-size: 16px;
    opacity: 0.9;
}

/* ===== 产品卡片 ===== */
.product-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.product-card {
    background-color: var(--white);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

.product-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.product-card-image {
    position: relative;
    height: 250px;
    overflow: hidden;
}

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

.product-card:hover .product-card-image img {
    transform: scale(1.1);
}

.product-card-body {
    padding: 20px;
}

.product-card-title {
    font-size: 20px;
    font-weight: bold;
    margin-bottom: 10px;
    color: var(--dark-color);
}

.product-card-summary {
    font-size: 14px;
    color: var(--light-color);
    margin-bottom: 15px;
    line-height: 1.6;
}

.product-card-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.product-card-price {
    font-size: 18px;
    font-weight: bold;
    color: var(--secondary-color);
}

/* ===== 页脚 ===== */
.site-footer {
    background-color: #1a1a1a;
    color: #999;
}

.footer-top {
    padding: 60px 0;
}

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

.footer-title {
    font-size: 18px;
    color: var(--white);
    margin-bottom: 20px;
    position: relative;
}

.footer-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 50px;
    height: 2px;
    background-color: var(--primary-color);
}

.footer-desc {
    margin-bottom: 20px;
    line-height: 1.8;
}

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

.social-links a {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: #333;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    transition: all 0.3s ease;
}

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

.footer-links li {
    margin-bottom: 10px;
}

.footer-links a {
    color: #999;
}

.footer-links a:hover {
    color: var(--white);
    padding-left: 5px;
}

.contact-info li {
    display: flex;
    align-items: flex-start;
    margin-bottom: 15px;
}

.contact-info i {
    color: var(--primary-color);
    margin-right: 10px;
    margin-top: 5px;
}

.footer-bottom {
    background-color: #0a0a0a;
    padding: 20px 0;
    text-align: center;
}

.footer-bottom p {
    font-size: 14px;
    margin-bottom: 5px;
}

/* ===== 回到顶部 ===== */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
    z-index: 999;
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    background-color: #0052a3;
    transform: translateY(-5px);
}

/* ===== 分页 ===== */
.pagination {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-top: 40px;
}

.pagination a,
.pagination span {
    padding: 8px 16px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    color: var(--dark-color);
}

.pagination a:hover {
    background-color: var(--primary-color);
    color: var(--white);
    border-color: var(--primary-color);
}

.pagination span.active {
    background-color: var(--primary-color);
    color: var(--white);
    border-color: var(--primary-color);
}

/* ===== 表单样式 ===== */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--dark-color);
}

.form-control {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-size: 14px;
    transition: all 0.3s ease;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(0, 102, 204, 0.1);
}

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

/* ===== 响应式 ===== */
@media (max-width: 992px) {
    .product-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .quick-entry-grid,
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .hero-content h1 {
        font-size: 32px;
    }
    
    .hero-content p {
        font-size: 16px;
    }
    
    .product-grid,
    .quick-entry-grid,
    .stats-grid,
    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .section-title h2 {
        font-size: 28px;
    }
}