/* ============================================
   MEXOU 企业官网样式表
   品牌：MEXOU - 小型工程机械专家
   设计风格：专业、现代、稳重
   ============================================ */

/* 全局变量 */
:root {
    --primary: #1a5c7e;
    --primary-dark: #0f3b5c;
    --primary-light: #2c7a9e;
    --secondary: #e8a838;
    --secondary-dark: #d4922a;
    --dark: #1e293b;
    --gray-dark: #334155;
    --gray: #64748b;
    --gray-light: #94a3b8;
    --gray-bg: #f8fafc;
    --border: #e2e8f0;
    --white: #ffffff;
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1);
    --shadow-md: 0 10px 15px -3px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 20px 25px -5px rgb(0 0 0 / 0.1);
    --radius-sm: 8px;
    --radius: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--white);
    color: var(--dark);
    line-height: 1.5;
    overflow-x: hidden;
}

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

/* ============================================
   顶部语言栏
   ============================================ */
.top-bar {
    background-color: var(--primary-dark);
    padding: 8px 0;
}

.lang-switch {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: 8px;
}

.lang-btn {
    background: none;
    border: none;
    color: rgba(255,255,255,0.7);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    padding: 4px 8px;
    transition: all 0.2s;
    border-radius: 4px;
}

.lang-btn:hover {
    color: var(--white);
    background: rgba(255,255,255,0.1);
}

.lang-btn.active {
    color: var(--white);
    background: rgba(255,255,255,0.15);
}

.lang-divider {
    color: rgba(255,255,255,0.3);
}

/* ============================================
   导航栏
   ============================================ */
.navbar {
    position: sticky;
    top: 0;
    background: var(--white);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    border-bottom: 1px solid var(--border);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
}

.logo {
    display: flex;
    flex-direction: column;
}

.logo-mexou {
    font-size: 28px;
    font-weight: 800;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, var(--primary), var(--primary-light));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.logo-tagline {
    font-size: 11px;
    font-weight: 500;
    color: var(--gray);
    letter-spacing: 1px;
}

.nav-links {
    display: flex;
    gap: 32px;
    list-style: none;
}

.nav-links a {
    text-decoration: none;
    font-weight: 500;
    color: var(--dark);
    transition: color 0.2s;
    font-size: 15px;
}

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

.mobile-menu {
    display: none;
    font-size: 28px;
    cursor: pointer;
    color: var(--dark);
}

/* ============================================
   按钮样式
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    font-weight: 600;
    font-size: 15px;
    border-radius: 40px;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
    border: none;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

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

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

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

.btn-small {
    display: inline-block;
    padding: 6px 16px;
    font-size: 13px;
    font-weight: 500;
    color: var(--primary);
    text-decoration: none;
    border-radius: 20px;
    transition: all 0.2s;
}

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

/* ============================================
   通用 Section 样式
   ============================================ */
section {
    padding: 20px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 56px;
}

.section-tag {
    display: inline-block;
    font-size: 14px;
    font-weight: 600;
    color: var(--primary);
    background: rgba(26, 92, 126, 0.1);
    padding: 6px 16px;
    border-radius: 40px;
    margin-bottom: 16px;
    letter-spacing: 0.5px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 16px;
    letter-spacing: -0.02em;
}

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

/* ============================================
   Hero 区域
   ============================================ */
.hero {
    position: relative;
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary) 100%);
    min-height: 500px;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('https://placehold.co/1920x800/1a5c7e/ffffff?text=MEXOU+Banner') center/cover no-repeat;
    opacity: 0.15;
    mix-blend-mode: overlay;
}

.hero-content {
    position: relative;
    z-index: 2;
    color: var(--white);
    max-width: 700px;
}

.hero-badge {
    display: inline-block;
    background: rgba(255,255,255,0.15);
    backdrop-filter: blur(4px);
    padding: 6px 16px;
    border-radius: 40px;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 24px;
}

.hero-content h1 {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
}

.hero-content p {
    font-size: 1.2rem;
    opacity: 0.9;
    margin-bottom: 32px;
    max-width: 550px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 48px;
}

.hero-stats {
    display: flex;
    gap: 48px;
}

.hero-stats .stat h3 {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 4px;
}

.hero-stats .stat p {
    font-size: 14px;
    opacity: 0.8;
    margin: 0;
}

/* ============================================
   产品分类卡片
   ============================================ */
.product-categories {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 32px;
}

.category-card {
    background: var(--white);
    padding: 32px 24px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    transition: all 0.3s;
    border: 1px solid var(--border);
    text-align: center;
}

.category-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

.category-icon {
    font-size: 3rem;
    color: var(--primary);
    margin-bottom: 20px;
}

.category-card h3 {
    font-size: 1.4rem;
    margin-bottom: 12px;
    color: var(--dark);
}

.category-card p {
    color: var(--gray);
    margin-bottom: 20px;
    line-height: 1.6;
}

.learn-more {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    font-size: 14px;
    transition: all 0.2s;
}

.learn-more:hover {
    color: var(--primary-dark);
    gap: 8px;
}

/* ============================================
   优势特点
   ============================================ */
.advantages {
    background: var(--gray-bg);
}

.advantage-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 32px;
}

.advantage-item {
    text-align: center;
    padding: 24px;
}

.advantage-icon {
    width: 70px;
    height: 70px;
    background: rgba(26, 92, 126, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 2rem;
    color: var(--primary);
}

.advantage-item h3 {
    font-size: 1.3rem;
    margin-bottom: 12px;
}

.advantage-item p {
    color: var(--gray);
}

/* ============================================
   热门产品网格
   ============================================ */
.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
}

.product-card {
    background: var(--white);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: all 0.3s;
    border: 1px solid var(--border);
}

.product-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.product-img img {
    width: 100%;
    height: 240px;
    object-fit: cover;
}

.product-info {
    padding: 20px;
}

.product-info h3 {
    font-size: 1.2rem;
    margin-bottom: 8px;
    color: var(--dark);
}

.product-desc {
    color: var(--gray);
    font-size: 14px;
    margin-bottom: 16px;
    line-height: 1.5;
}

.product-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 12px;
}

.product-model {
    font-size: 12px;
    color: var(--gray-light);
    font-family: monospace;
}

/* ============================================
   关于预览
   ============================================ */
.about-preview {
    background: var(--white);
}

.about-grid {
    display: flex;
    gap: 60px;
    align-items: center;
    flex-wrap: wrap;
}

.about-text {
    flex: 1;
}

.about-text .section-tag {
    margin-bottom: 16px;
}

.about-text h2 {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 24px;
    color: var(--dark);
}

.about-text p {
    color: var(--gray);
    margin-bottom: 20px;
    line-height: 1.7;
}

.about-features {
    list-style: none;
    margin: 24px 0 32px;
}

.about-features li {
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.about-features li i {
    color: var(--primary);
    font-size: 1.1rem;
}

.about-image {
    flex: 1;
}

.about-image img {
    width: 100%;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
}

/* ============================================
   质量管理预览
   ============================================ */
.quality-preview {
    background: var(--gray-bg);
}

.quality-flex {
    display: flex;
    gap: 60px;
    align-items: center;
    flex-wrap: wrap;
}

.quality-image {
    flex: 1;
}

.quality-image img {
    width: 100%;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.quality-text {
    flex: 1;
}

.quality-text .section-tag {
    margin-bottom: 16px;
}

.quality-text h2 {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 20px;
}

.quality-text p {
    color: var(--gray);
    margin-bottom: 28px;
    line-height: 1.7;
}

.quality-badges {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 32px;
}

.badge {
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--white);
    padding: 8px 18px;
    border-radius: 40px;
    font-weight: 500;
    font-size: 14px;
    color: var(--primary);
    box-shadow: var(--shadow-sm);
}

.badge i {
    font-size: 1rem;
}

/* ============================================
   全球布局
   ============================================ */
.global-presence {
    background: var(--white);
}

.global-map img {
    width: 100%;
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
}

/* ============================================
   CTA 区域
   ============================================ */
.cta-section {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    margin: 40px 0 0;
    padding: 80px 0;
}

.cta-content {
    text-align: center;
    color: var(--white);
}

.cta-content h2 {
    font-size: 2.2rem;
    margin-bottom: 16px;
}

.cta-content p {
    font-size: 1.1rem;
    opacity: 0.9;
    margin-bottom: 32px;
}

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

/* ============================================
   页脚
   ============================================ */
footer {
    background: var(--dark);
    color: var(--gray-light);
    padding: 56px 0 32px;
}

.footer-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 48px;
    margin-bottom: 48px;
}

.footer-logo {
    font-size: 28px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-light), #5ba0c0);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    margin-bottom: 12px;
}

.footer-col p {
    margin: 12px 0;
    line-height: 1.6;
}

.footer-col h4 {
    color: var(--white);
    margin-bottom: 20px;
    font-size: 1.1rem;
}

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

.footer-col ul li {
    margin-bottom: 12px;
}

.footer-col ul li a {
    color: var(--gray-light);
    text-decoration: none;
    transition: color 0.2s;
}

.footer-col ul li a:hover {
    color: var(--primary-light);
}

.contact-info-list li {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.contact-info-list li i {
    width: 20px;
    color: var(--primary-light);
}

.social-links {
    display: flex;
    gap: 16px;
    margin-top: 20px;
}

.social-links a {
    width: 38px;
    height: 38px;
    background: rgba(255,255,255,0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray-light);
    text-decoration: none;
    transition: all 0.2s;
}

.social-links a:hover {
    background: var(--primary);
    color: var(--white);
    transform: translateY(-2px);
}

.copyright {
    text-align: center;
    padding-top: 32px;
    border-top: 1px solid rgba(255,255,255,0.1);
    font-size: 14px;
}

/* ============================================
   产品页面专用样式
   ============================================ */
.products-hero {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    padding: 60px 0;
    color: var(--white);
    text-align: center;
}

.products-hero h1 {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.product-filters {
    display: flex;
    justify-content: center;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 48px;
}

.filter-btn {
    padding: 10px 24px;
    border: 1px solid var(--border);
    background: var(--white);
    border-radius: 40px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--primary);
    color: var(--white);
    border-color: var(--primary);
}

/* ============================================
   关于页面样式
   ============================================ */
.about-hero {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    padding: 60px 0;
    color: var(--white);
    text-align: center;
}

.about-hero h1 {
    font-size: 2.5rem;
    margin-bottom: 16px;
}

.mission-vision {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    margin: 60px 0;
}

.mission-card, .vision-card {
    text-align: center;
    padding: 40px 32px;
    background: var(--gray-bg);
    border-radius: var(--radius-lg);
}

.mission-card i, .vision-card i {
    font-size: 3rem;
    color: var(--primary);
    margin-bottom: 20px;
}

/* ============================================
   质量管理页面样式
   ============================================ */
.quality-hero {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    padding: 60px 0;
    color: var(--white);
    text-align: center;
}

.cert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 32px;
    margin: 48px 0;
}

.cert-item {
    text-align: center;
    padding: 24px;
    background: var(--gray-bg);
    border-radius: var(--radius);
}

.cert-item i {
    font-size: 3rem;
    color: var(--primary);
    margin-bottom: 16px;
}

.process-steps {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 24px;
    margin: 48px 0;
}

.step {
    flex: 1;
    text-align: center;
    padding: 24px;
    background: var(--gray-bg);
    border-radius: var(--radius);
}

.step-number {
    width: 48px;
    height: 48px;
    background: var(--primary);
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto 16px;
}

/* ============================================
   团队页面样式
   ============================================ */
.team-hero {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    padding: 60px 0;
    color: var(--white);
    text-align: center;
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px;
    margin: 60px 0;
}

.team-card {
    text-align: center;
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: all 0.3s;
}

.team-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.team-card img {
    width: 100%;
    height: 300px;
    object-fit: cover;
}

.team-info {
    padding: 24px;
}

.team-info h3 {
    font-size: 1.3rem;
    margin-bottom: 6px;
}

.team-title {
    color: var(--primary);
    font-weight: 600;
    margin-bottom: 12px;
}

.team-desc {
    color: var(--gray);
    font-size: 14px;
}

/* ============================================
   联系页面样式
   ============================================ */
.contact-hero {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary));
    padding: 60px 0;
    color: var(--white);
    text-align: center;
}

.contact-grid {
    display: flex;
    gap: 60px;
    flex-wrap: wrap;
    margin: 60px 0;
}

.contact-info-card {
    flex: 1;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 24px;
    background: var(--gray-bg);
    border-radius: var(--radius);
    margin-bottom: 24px;
}

.contact-item i {
    width: 50px;
    height: 50px;
    background: rgba(26, 92, 126, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: var(--primary);
}

.contact-item h4 {
    margin-bottom: 4px;
}

.contact-form-card {
    flex: 1;
    background: var(--gray-bg);
    padding: 32px;
    border-radius: var(--radius-lg);
}

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

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 14px 18px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 15px;
    transition: all 0.2s;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(26, 92, 126, 0.1);
}

/* ============================================
   响应式设计
   ============================================ */
@media (max-width: 992px) {
    .hero-content h1 {
        font-size: 2.5rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    section {
        padding: 60px 0;
    }
}

@media (max-width: 768px) {
    .mobile-menu {
        display: block;
    }
    
    .nav-links {
        display: none;
        width: 100%;
        flex-direction: column;
        background: var(--white);
        padding: 20px 0;
        gap: 16px;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        box-shadow: var(--shadow-md);
        border-top: 1px solid var(--border);
    }
    
    .nav-links.show {
        display: flex;
    }
    
    .hero-stats {
        flex-wrap: wrap;
        gap: 24px;
    }
    
    .hero-content h1 {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .about-grid, .quality-flex {
        flex-direction: column;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
}

@media (max-width: 576px) {
    .container {
        padding: 0 16px;
    }
    
    .hero-content h1 {
        font-size: 1.8rem;
    }
    
    .btn {
        padding: 10px 20px;
    }
    
    .product-categories {
        grid-template-columns: 1fr;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: stretch;
    }
    
    .hero-buttons .btn {
        justify-content: center;
    }
}

/* ============================================
   动画效果
   ============================================ */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.category-card, .product-card, .advantage-item {
    animation: fadeInUp 0.6s ease-out;
}