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

:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --secondary: #f97316;
    --dark: #1e293b;
    --light: #f8fafc;
    --gray: #64748b;
    --transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

body {
    font-family: 'Noto Sans SC', sans-serif;
    color: var(--dark);
    line-height: 1.6;
    background-color: var(--light);
    overflow-x: hidden;
}

h1, h2, h3, h4, h5, h6 {
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    line-height: 1.2;
}

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

.btn {
    display: inline-block;
    padding: 12px 30px;
    background: var(--primary);
    color: white;
    border-radius: 30px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(37, 99, 235, 0.2);
}

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

.btn-secondary:hover {
    background: #ea580c;
}

.section {
    padding: 100px 0;
}

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

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

.section-title h2::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--primary);
    border-radius: 2px;
}

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

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    padding: 10px 0;
}

.navbar-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

.logo {
    display: flex;
    align-items: center;
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
}

.logo i {
    margin-right: 10px;
}

.nav-links {
    display: flex;
    list-style: none;
}

.nav-links li {
    margin-left: 30px;
}

.nav-links a {
    color: var(--dark);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: var(--transition);
}

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

.nav-links a:hover::after {
    width: 100%;
}

.mobile-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--dark);
}

/* 英雄区域 */
.hero {
    height: 100vh;
    background: linear-gradient(135deg, rgba(37, 99, 235, 0.9), rgba(30, 41, 59, 0.9)), url('https://images.unsplash.com/photo-1497366754035-f200968a6e72?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=1500&q=80') center/cover no-repeat;
    display: flex;
    align-items: center;
    color: white;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at center, transparent 0%, rgba(0, 0, 0, 0.5) 100%);
}

.hero-content {
    position: relative;
    max-width: 800px;
    padding-top: 80px;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    opacity: 0.9;
}

.hero-btns {
    display: flex;
    gap: 15px;
}

/* 服务区域 */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.service-card {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
}

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

.service-icon {
    height: 200px;
    background: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 4rem;
}

.service-content {
    padding: 30px;
}

.service-content h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
}

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

/* 统计区域 */
.stats {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    text-align: center;
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 30px;
}

.stat-item {
    padding: 30px;
}

.stat-item i {
    font-size: 3rem;
    margin-bottom: 20px;
    color: rgba(255, 255, 255, 0.8);
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.stat-text {
    font-size: 1.1rem;
    opacity: 0.9;
}

/* 团队区域 */
.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.team-member {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
}

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

.member-image {
    height: 300px;
    overflow: hidden;
}

.member-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.team-member:hover .member-image img {
    transform: scale(1.05);
}

.member-info {
    padding: 25px;
    text-align: center;
}

.member-info h3 {
    font-size: 1.4rem;
    margin-bottom: 5px;
}

.member-position {
    color: var(--primary);
    font-weight: 500;
    margin-bottom: 15px;
}

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

.social-links a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--light);
    color: var(--primary);
    transition: var(--transition);
}

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

/* 评价区域 */
.testimonials {
    background: var(--light);
}

.testimonial-slider {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.testimonial {
    background: white;
    border-radius: 15px;
    padding: 40px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    text-align: center;
}

.client-image {
    width: 100px;
    height: 100px;
    border-radius: 50%;
    overflow: hidden;
    margin: 0 auto 20px;
    border: 5px solid var(--light);
}

.client-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.testimonial-content {
    font-size: 1.1rem;
    font-style: italic;
    color: var(--gray);
    margin-bottom: 20px;
    line-height: 1.8;
}

.client-name {
    font-weight: 600;
    font-size: 1.2rem;
}

.client-position {
    color: var(--primary);
    font-size: 0.9rem;
}

.slider-nav {
    display: flex;
    justify-content: center;
    margin-top: 30px;
    gap: 10px;
}

.slider-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--gray);
    opacity: 0.3;
    cursor: pointer;
    transition: var(--transition);
}

.slider-dot.active {
    background: var(--primary);
    opacity: 1;
    transform: scale(1.2);
}

/* 联系区域 */
.contact {
    background: linear-gradient(135deg, rgba(30, 41, 59, 0.9), rgba(37, 99, 235, 0.9)), url('https://images.unsplash.com/photo-1517245386807-bb43f82c33c4?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=1500&q=80') center/cover no-repeat;
    color: white;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 50px;
}

.contact-info h3 {
    font-size: 1.8rem;
    margin-bottom: 30px;
}

.contact-detail {
    display: flex;
    align-items: flex-start;
    margin-bottom: 25px;
}

.contact-icon {
    font-size: 1.5rem;
    color: var(--secondary);
    margin-right: 15px;
    min-width: 30px;
}

.contact-text h4 {
    font-size: 1.2rem;
    margin-bottom: 5px;
}

.contact-text p {
    opacity: 0.9;
}

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

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 15px;
    border: none;
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.1);
    color: white;
    font-size: 1rem;
    transition: var(--transition);
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    background: rgba(255, 255, 255, 0.15);
    box-shadow: 0 0 0 2px var(--secondary);
}

.contact-form textarea {
    height: 150px;
    resize: none;
}

::placeholder {
    color: rgba(255, 255, 255, 0.7);
}

/* 产品展示区域 */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.product-card {
    background: white;
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: var(--transition);
}

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

.product-card img {
    width: 100%;
    height: 250px;
    object-fit: cover;
}

.product-card-body {
    padding: 25px;
}

.product-card-body h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
}

.product-card-body p {
    color: var(--gray);
    margin-bottom: 15px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.product-card-body .price {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--secondary);
    margin-bottom: 15px;
}

/* 产品详情页 */
.product-detail {
    padding-top: 120px;
}

.product-detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: start;
}

.product-detail-image {
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.product-detail-image img {
    width: 100%;
    display: block;
}

.product-detail-info h1 {
    font-size: 2.2rem;
    margin-bottom: 20px;
}

.product-detail-info .price {
    font-size: 1.8rem;
    color: var(--secondary);
    font-weight: 700;
    margin-bottom: 20px;
}

.product-detail-info .description {
    color: var(--gray);
    line-height: 1.8;
    margin-bottom: 30px;
}

.product-meta {
    display: flex;
    gap: 30px;
    margin-bottom: 30px;
    padding: 20px;
    background: var(--light);
    border-radius: 10px;
}

.product-meta-item {
    text-align: center;
}

.product-meta-item .label {
    font-size: 0.9rem;
    color: var(--gray);
    margin-bottom: 5px;
}

.product-meta-item .value {
    font-size: 1.1rem;
    font-weight: 600;
}

.inquiry-form {
    background: var(--light);
    padding: 30px;
    border-radius: 15px;
}

.inquiry-form h3 {
    margin-bottom: 20px;
    font-size: 1.3rem;
}

.inquiry-form .form-group {
    margin-bottom: 15px;
}

.inquiry-form input,
.inquiry-form textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid #e2e8f0;
    border-radius: 8px;
    font-size: 1rem;
    transition: var(--transition);
}

.inquiry-form input:focus,
.inquiry-form textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.inquiry-form textarea {
    height: 100px;
    resize: none;
}

.alert {
    padding: 15px 20px;
    border-radius: 8px;
    margin-bottom: 20px;
    font-weight: 500;
}

.alert-success {
    background: #dcfce7;
    color: #166534;
    border: 1px solid #bbf7d0;
}

.alert-error {
    background: #fef2f2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

/* 页脚 */
.footer {
    background: var(--dark);
    color: white;
    padding: 80px 0 30px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 60px;
}

.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(--primary);
}

.footer-links {
    list-style: none;
}

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

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: var(--transition);
}

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

.footer-about p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 20px;
}

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

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

.footer-social a:hover {
    background: var(--primary);
    transform: translateY(-5px);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
}

/* 回到顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    box-shadow: 0 5px 15px rgba(37, 99, 235, 0.3);
    z-index: 999;
}

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

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-5px);
}

/* 响应式设计 */
@media (max-width: 992px) {
    .hero h1 {
        font-size: 3rem;
    }

    .section {
        padding: 80px 0;
    }

    .product-detail-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .mobile-toggle {
        display: block;
    }

    .nav-links {
        position: fixed;
        top: 80px;
        left: 0;
        width: 100%;
        background: white;
        flex-direction: column;
        align-items: center;
        padding: 30px 0;
        box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
        transform: translateY(-150%);
        transition: var(--transition);
    }

    .nav-links.active {
        transform: translateY(0);
    }

    .nav-links li {
        margin: 15px 0;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

    .hero-btns {
        flex-direction: column;
    }

    .section-title h2 {
        font-size: 2rem;
    }
}

@media (max-width: 576px) {
    .hero h1 {
        font-size: 2rem;
    }

    .hero p {
        font-size: 1rem;
    }

    .section-title h2 {
        font-size: 1.8rem;
    }

    .stat-number {
        font-size: 2.5rem;
    }
}

/* 面包屑 */
.breadcrumb { font-size: 14px; color: var(--gray-500); margin-bottom: 12px; padding-top: 100px; }
.breadcrumb a { color: var(--gray-500); text-decoration: none; }
.breadcrumb a:hover { color: var(--primary); }

/* 筛选条 */
.filter-bar { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 20px; }
.filter-tag { padding: 8px 18px; border-radius: 20px; font-size: 14px; text-decoration: none; background: #f1f5f9; color: var(--gray-700); transition: all 0.2s; }
.filter-tag.active, .filter-tag:hover { background: var(--primary); color: white; }

/* 搜索框 */
.search-box { display: flex; gap: 8px; margin-bottom: 24px; }
.search-box input { flex: 1; padding: 10px 18px; border: 1px solid #e2e8f0; border-radius: 8px; font-size: 14px; }
.search-box input:focus { outline: none; border-color: var(--primary); }
.search-box button { padding: 10px 24px; background: var(--primary); color: white; border: none; border-radius: 8px; cursor: pointer; font-size: 14px; }

/* 产品网格 */
.product-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr)); gap: 24px; }
.product-badge { position: absolute; top: 10px; left: 10px; background: var(--secondary); color: white; padding: 3px 10px; border-radius: 4px; font-size: 12px; font-weight: 600; z-index: 2; }
.product-image { width: 100%; height: 220px; object-fit: cover; display: block; }
.product-body { padding: 16px; }
.product-body .product-category { font-size: 12px; color: var(--primary); margin-bottom: 6px; }
.product-body .product-name { font-size: 16px; margin-bottom: 8px; }
.product-body .product-description { font-size: 13px; color: var(--gray-500); }
.product-footer { padding: 0 16px 16px; display: flex; justify-content: space-between; align-items: center; }
.product-footer .product-price { font-size: 18px; font-weight: 700; color: var(--secondary); }
.product-footer .product-price .unit { font-size: 13px; font-weight: 400; color: var(--gray-500); }
.product-footer .product-price .original { font-size: 13px; color: var(--gray-400); text-decoration: line-through; margin-left: 8px; }
.btn-cart { padding: 6px 16px; background: var(--primary); color: white; border: none; border-radius: 6px; font-size: 13px; cursor: pointer; transition: all 0.2s; }
.btn-cart:hover { background: var(--primary-dark); }

/* 通用表单 */
.form-card { background: var(--white); padding: 24px; border-radius: 12px; box-shadow: 0 4px 20px rgba(0,0,0,0.06); }
.form-group { margin-bottom: 16px; }
.form-group label { display: block; margin-bottom: 6px; font-weight: 600; font-size: 14px; color: var(--gray-700); }
.form-control { width: 100%; padding: 10px 14px; border: 1px solid #e2e8f0; border-radius: 8px; font-size: 14px; transition: all 0.2s; }
.form-control:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(37,99,235,0.1); }
textarea.form-control { resize: vertical; }

/* 提示消息 */
.flash { padding: 12px 16px; border-radius: 8px; margin-bottom: 16px; font-weight: 500; }
.flash.success { background: #dcfce7; color: #166534; }
.flash.error { background: #fef2f2; color: #991b1b; }

/* 小按钮 */
.btn-sm { padding: 6px 16px !important; font-size: 13px !important; border-radius: 6px !important; }
.btn-primary { background: var(--primary); color: white; border: none; }
.btn-outline { background: transparent; border: 1px solid #e2e8f0; }

/* 空状态 */
.empty-state { text-align: center; padding: 60px 20px; }
.empty-state i { font-size: 3rem; color: var(--gray-300); margin-bottom: 16px; display: block; }
.empty-state p { font-size: 16px; color: var(--gray-500); }

/* 分页 */
.pagination { display: flex; justify-content: center; gap: 8px; margin-top: 36px; }
.pagination a, .pagination span { padding: 8px 16px; border-radius: 8px; font-size: 14px; text-decoration: none; background: #f1f5f9; color: var(--gray-700); transition: all 0.2s; }
.pagination a:hover { background: var(--primary); color: white; }
.pagination .current { background: var(--primary); color: white; }
.pagination .disabled { opacity: 0.4; cursor: default; }

/* 视频容器 */
.video-container { border-radius: 12px; overflow: hidden; }
.video-container video { width: 100%; display: block; }

/* 后台通用 */
.admin-layout { display: flex; min-height: calc(100vh - 120px); }
.admin-sidebar { width: 220px; background: var(--gray-900); color: var(--white); padding: 20px 0; flex-shrink: 0; }
.admin-sidebar h3 { padding: 0 20px; font-size: 14px; color: var(--gray-400); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 12px; }
.admin-sidebar a { display: block; padding: 10px 20px; color: var(--gray-300); font-size: 14px; text-decoration: none; transition: all 0.2s; }
.admin-sidebar a:hover, .admin-sidebar a.active { background: var(--primary); color: var(--white); }
.admin-main { flex: 1; padding: 24px; background: var(--gray-50); }
.admin-main h1 { font-size: 22px; margin-bottom: 20px; }