/* Awaylon 埃维隆 - 空调出风口品牌网站样式 */

/* ==================== CSS 变量 ==================== */
:root {
    /* 主色调 */
    --color-primary: #0EA5E9;
    --color-primary-dark: #0284C7;
    --color-primary-light: #38BDF8;
    --color-secondary: #1F2937;
    --color-accent: #F59E0B;
    
    /* 背景色 */
    --color-bg: #FAFAFA;
    --color-bg-dark: #111827;
    --color-white: #FFFFFF;
    --color-border: #E5E7EB;
    --color-border-dark: #D1D5DB;
    
    /* 文字色 */
    --color-text: #1F2937;
    --color-text-light: #6B7280;
    --color-text-muted: #9CA3AF;
    
    /* 间距 */
    --space-xs: 8px;
    --space-sm: 16px;
    --space-md: 24px;
    --space-lg: 48px;
    --space-xl: 64px;
    --space-2xl: 96px;
    
    /* 圆角 */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    
    /* 阴影 */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 24px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.16);
    
    /* 过渡 */
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: 0.15s ease;
}

/* ==================== 重置样式 ==================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Noto Sans SC', 'Montserrat', -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul, ol {
    list-style: none;
}

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

button, input, textarea, select {
    font-family: inherit;
    font-size: inherit;
}

/* ==================== 排版 ==================== */
h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-secondary);
}

h1 {
    font-size: clamp(36px, 5vw, 56px);
    letter-spacing: -0.02em;
}

h2 {
    font-size: clamp(28px, 4vw, 40px);
    letter-spacing: -0.01em;
}

h3 {
    font-size: clamp(22px, 3vw, 28px);
}

h4 {
    font-size: 20px;
    font-weight: 600;
}

p {
    margin-bottom: 1em;
}

p:last-child {
    margin-bottom: 0;
}

.text-primary {
    color: var(--color-primary);
}

.text-muted {
    color: var(--color-text-light);
}

.text-small {
    font-size: 14px;
}

/* ==================== 布局 ==================== */
.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.section {
    padding: var(--space-xl) 0;
}

@media (max-width: 768px) {
    .section {
        padding: var(--space-lg) 0;
    }
}

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

.section-dark h2,
.section-dark h3,
.section-dark h4 {
    color: var(--color-white);
}

/* ==================== 导航栏 ==================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 72px;
    z-index: 1000;
    transition: var(--transition);
}

.navbar.scrolled {
    background-color: var(--color-white);
    box-shadow: var(--shadow-sm);
}

.navbar-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 var(--space-md);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 20px;
    font-weight: 700;
    color: var(--color-white);
    transition: var(--transition);
}

.navbar.scrolled .logo {
    color: var(--color-secondary);
}

.logo-en {
    font-family: 'Montserrat', sans-serif;
    font-size: 14px;
    font-weight: 600;
    opacity: 0.8;
    letter-spacing: 0.1em;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.nav-link {
    position: relative;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-white);
    padding: var(--space-xs) 0;
    transition: var(--transition);
}

.navbar.scrolled .nav-link {
    color: var(--color-text);
}

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

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

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

.nav-cta {
    display: none;
}

@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .nav-cta {
        display: block;
    }
    
    .mobile-menu-btn {
        display: flex;
        flex-direction: column;
        gap: 5px;
        background: none;
        border: none;
        cursor: pointer;
        padding: var(--space-xs);
    }
    
    .mobile-menu-btn span {
        display: block;
        width: 24px;
        height: 2px;
        background-color: var(--color-white);
        transition: var(--transition);
    }
    
    .navbar.scrolled .mobile-menu-btn span {
        background-color: var(--color-secondary);
    }
}

/* ==================== 按钮 ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-xs);
    height: 48px;
    padding: 0 var(--space-md);
    font-size: 14px;
    font-weight: 600;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid transparent;
}

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

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

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

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

.btn-dark {
    background-color: transparent;
    color: var(--color-secondary);
    border-color: var(--color-secondary);
}

.btn-dark:hover {
    background-color: var(--color-secondary);
    color: var(--color-white);
    transform: translateY(-2px);
}

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

.btn-accent:hover {
    background-color: #D97706;
    border-color: #D97706;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-sm {
    height: 36px;
    padding: 0 var(--space-sm);
    font-size: 13px;
}

.btn-lg {
    height: 56px;
    padding: 0 var(--space-lg);
    font-size: 16px;
}

/* ==================== Hero 区域 ==================== */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.hero-video {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: -1;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        to bottom,
        rgba(17, 24, 39, 0.4) 0%,
        rgba(17, 24, 39, 0.6) 100%
    );
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    color: var(--color-white);
    max-width: 900px;
    padding: 0 var(--space-md);
}

.hero-subtitle {
    font-family: 'Montserrat', sans-serif;
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--color-primary-light);
    margin-bottom: var(--space-sm);
    opacity: 0;
    animation: fadeInUp 0.8s ease forwards;
    animation-delay: 0.2s;
}

.hero-title {
    font-size: clamp(42px, 8vw, 72px);
    font-weight: 900;
    letter-spacing: -0.02em;
    margin-bottom: var(--space-sm);
    opacity: 0;
    animation: fadeInUp 0.8s ease forwards;
    animation-delay: 0.4s;
}

.hero-title-en {
    font-family: 'Montserrat', sans-serif;
    font-size: clamp(24px, 4vw, 36px);
    font-weight: 700;
    letter-spacing: 0.2em;
    color: var(--color-primary-light);
    margin-bottom: var(--space-md);
    opacity: 0;
    animation: fadeInUp 0.8s ease forwards;
    animation-delay: 0.6s;
}

.hero-desc {
    font-size: clamp(16px, 2vw, 20px);
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: var(--space-lg);
    opacity: 0;
    animation: fadeInUp 0.8s ease forwards;
    animation-delay: 0.8s;
}

.hero-buttons {
    display: flex;
    gap: var(--space-sm);
    justify-content: center;
    flex-wrap: wrap;
    opacity: 0;
    animation: fadeInUp 0.8s ease forwards;
    animation-delay: 1s;
}

.hero-scroll {
    position: absolute;
    bottom: var(--space-lg);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
    color: rgba(255, 255, 255, 0.6);
    font-size: 12px;
    letter-spacing: 0.1em;
    animation: bounce 2s infinite;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

/* ==================== 优势区块 ==================== */
.features {
    padding: var(--space-2xl) 0;
    background-color: var(--color-white);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-md);
}

@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 576px) {
    .features-grid {
        grid-template-columns: 1fr;
    }
}

.feature-card {
    text-align: center;
    padding: var(--space-lg) var(--space-md);
    border-radius: var(--radius-lg);
    background-color: var(--color-bg);
    transition: var(--transition);
}

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

.feature-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--space-md);
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    border-radius: var(--radius-lg);
    color: var(--color-white);
}

.feature-icon svg {
    width: 28px;
    height: 28px;
}

.feature-card h4 {
    margin-bottom: var(--space-xs);
}

.feature-card p {
    font-size: 14px;
    color: var(--color-text-light);
}

/* ==================== 产品分类 ==================== */
.products-categories {
    padding: var(--space-2xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-xl);
}

.section-label {
    display: inline-block;
    font-family: 'Montserrat', sans-serif;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--color-primary);
    margin-bottom: var(--space-xs);
}

.section-title {
    margin-bottom: var(--space-sm);
}

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

.categories-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
}

@media (max-width: 1024px) {
    .categories-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 576px) {
    .categories-grid {
        grid-template-columns: 1fr;
    }
}

.category-card {
    position: relative;
    height: 320px;
    border-radius: var(--radius-xl);
    overflow: hidden;
    cursor: pointer;
}

.category-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--color-secondary);
    transition: var(--transition);
}

.category-card:hover .category-bg {
    transform: scale(1.05);
}

.category-content {
    position: relative;
    z-index: 1;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: var(--space-lg);
    color: var(--color-white);
}

.category-icon {
    width: 56px;
    height: 56px;
    margin-bottom: var(--space-md);
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    backdrop-filter: blur(10px);
}

.category-icon svg {
    width: 28px;
    height: 28px;
}

.category-card h3 {
    font-size: 24px;
    color: var(--color-white);
    margin-bottom: var(--space-xs);
}

.category-card p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--space-sm);
}

.category-price {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-primary-light);
}

.category-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 14px;
    font-weight: 500;
    color: var(--color-white);
    opacity: 0;
    transform: translateY(10px);
    transition: var(--transition);
}

.category-card:hover .category-link {
    opacity: 1;
    transform: translateY(0);
}

.category-link svg {
    width: 16px;
    height: 16px;
    transition: var(--transition);
}

.category-card:hover .category-link svg {
    transform: translateX(4px);
}

/* ==================== 产品卡片 ==================== */
.product-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-md);
}

@media (max-width: 1200px) {
    .product-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 900px) {
    .product-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 576px) {
    .product-grid {
        grid-template-columns: 1fr;
    }
}

.product-card {
    background-color: var(--color-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

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

.product-image {
    position: relative;
    height: 200px;
    background-color: var(--color-bg);
    overflow: hidden;
}

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

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

.product-badge {
    position: absolute;
    top: var(--space-xs);
    left: var(--space-xs);
    padding: 4px 10px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: var(--radius-sm);
}

.badge-hot {
    background-color: #EF4444;
    color: var(--color-white);
}

.badge-custom {
    background-color: var(--color-accent);
    color: var(--color-white);
}

.badge-new {
    background-color: #10B981;
    color: var(--color-white);
}

.product-info {
    padding: var(--space-md);
}

.product-model {
    font-family: 'Montserrat', sans-serif;
    font-size: 12px;
    font-weight: 600;
    color: var(--color-primary);
    letter-spacing: 0.1em;
    margin-bottom: var(--space-xs);
}

.product-card h4 {
    font-size: 16px;
    margin-bottom: var(--space-xs);
}

.product-features {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
    margin-bottom: var(--space-sm);
}

.product-tag {
    font-size: 11px;
    padding: 3px 8px;
    background-color: var(--color-bg);
    color: var(--color-text-light);
    border-radius: var(--radius-sm);
}

.product-price {
    font-size: 18px;
    font-weight: 700;
    color: var(--color-primary);
}

.product-price span {
    font-size: 14px;
    font-weight: 400;
    color: var(--color-text-light);
}

/* ==================== 项目案例 ==================== */
.projects {
    padding: var(--space-2xl) 0;
    background-color: var(--color-secondary);
    color: var(--color-white);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
}

@media (max-width: 1024px) {
    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 576px) {
    .projects-grid {
        grid-template-columns: 1fr;
    }
}

.project-card {
    position: relative;
    height: 280px;
    border-radius: var(--radius-lg);
    overflow: hidden;
    cursor: pointer;
}

.project-image {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: var(--color-text);
    transition: var(--transition);
}

.project-card:hover .project-image {
    transform: scale(1.05);
    opacity: 0.7;
}

.project-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: var(--space-lg);
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
}

.project-card h4 {
    font-size: 18px;
    color: var(--color-white);
    margin-bottom: var(--space-xs);
}

.project-card p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
}

/* ==================== 品牌介绍 ==================== */
.about-section {
    padding: var(--space-2xl) 0;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    align-items: center;
}

@media (max-width: 900px) {
    .about-grid {
        grid-template-columns: 1fr;
    }
}

.about-image {
    height: 400px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-white);
}

.about-image svg {
    width: 120px;
    height: 120px;
    opacity: 0.5;
}

.about-content h2 {
    margin-bottom: var(--space-md);
}

.about-content p {
    color: var(--color-text-light);
    margin-bottom: var(--space-md);
}

.about-stats {
    display: flex;
    gap: var(--space-lg);
    margin-top: var(--space-lg);
}

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

.stat-number {
    font-family: 'Montserrat', sans-serif;
    font-size: 36px;
    font-weight: 700;
    color: var(--color-primary);
}

.stat-label {
    font-size: 14px;
    color: var(--color-text-light);
}

/* ==================== CTA 区块 ==================== */
.cta-section {
    padding: var(--space-2xl) 0;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    color: var(--color-white);
    text-align: center;
}

.cta-section h2 {
    color: var(--color-white);
    margin-bottom: var(--space-sm);
}

.cta-section p {
    font-size: 18px;
    opacity: 0.9;
    margin-bottom: var(--space-lg);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* ==================== 页脚 ==================== */
.footer {
    background-color: var(--color-bg-dark);
    color: var(--color-white);
    padding: var(--space-xl) 0 var(--space-lg);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
}

@media (max-width: 900px) {
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 576px) {
    .footer-grid {
        grid-template-columns: 1fr;
    }
}

.footer-brand {
    max-width: 300px;
}

.footer-logo {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: var(--space-sm);
}

.footer-brand p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.8;
}

.footer h4 {
    font-size: 14px;
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: var(--space-md);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.footer-links li {
    margin-bottom: var(--space-xs);
}

.footer-links a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
}

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

.footer-contact p {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: var(--space-xs);
}

.footer-contact svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

.footer-bottom {
    padding-top: var(--space-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.footer-bottom p {
    font-size: 13px;
    color: rgba(255, 255, 255, 0.4);
}

/* ==================== 产品详情页 ==================== */
.page-header {
    padding: calc(72px + var(--space-xl)) 0 var(--space-xl);
    background-color: var(--color-secondary);
    color: var(--color-white);
    text-align: center;
}

.page-header h1 {
    color: var(--color-white);
    margin-bottom: var(--space-sm);
}

.page-header p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 16px;
}

/* 产品筛选 */
.product-filter {
    padding: var(--space-lg) 0;
    background-color: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 72px;
    z-index: 100;
}

.filter-nav {
    display: flex;
    gap: var(--space-md);
    overflow-x: auto;
    padding-bottom: var(--space-xs);
}

.filter-btn {
    white-space: nowrap;
    padding: var(--space-xs) var(--space-sm);
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-light);
    background: none;
    border: none;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
}

.filter-btn::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-primary);
    transition: var(--transition);
}

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

.filter-btn.active::after {
    width: 100%;
}

/* ==================== 关于页面 ==================== */
.story-section {
    padding: var(--space-2xl) 0;
}

.story-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-xl);
    align-items: center;
}

@media (max-width: 900px) {
    .story-grid {
        grid-template-columns: 1fr;
    }
}

.story-content h2 {
    margin-bottom: var(--space-md);
}

.story-content p {
    color: var(--color-text-light);
    line-height: 1.8;
}

.story-image {
    height: 400px;
    background: linear-gradient(135deg, var(--color-bg) 0%, var(--color-border) 100%);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
}

/* 定制能力 */
.custom-section {
    padding: var(--space-2xl) 0;
    background-color: var(--color-white);
}

.custom-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-md);
}

@media (max-width: 1024px) {
    .custom-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 576px) {
    .custom-grid {
        grid-template-columns: 1fr;
    }
}

.custom-card {
    text-align: center;
    padding: var(--space-lg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: var(--transition);
}

.custom-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
}

.custom-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto var(--space-md);
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-bg);
    border-radius: 50%;
}

.custom-icon svg {
    width: 28px;
    height: 28px;
    color: var(--color-primary);
}

/* ==================== 联系页面 ==================== */
.contact-section {
    padding: var(--space-2xl) 0;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--space-xl);
}

@media (max-width: 900px) {
    .contact-grid {
        grid-template-columns: 1fr;
    }
}

.contact-info {
    padding: var(--space-lg);
    background-color: var(--color-white);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border);
}

.contact-info h3 {
    margin-bottom: var(--space-lg);
}

.contact-item {
    display: flex;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.contact-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-bg);
    border-radius: var(--radius-md);
    flex-shrink: 0;
}

.contact-icon svg {
    width: 20px;
    height: 20px;
    color: var(--color-primary);
}

.contact-item h4 {
    font-size: 16px;
    margin-bottom: var(--space-xs);
}

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

/* 表单 */
.contact-form-wrapper {
    padding: var(--space-lg);
    background-color: var(--color-white);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border);
}

.contact-form-wrapper h3 {
    margin-bottom: var(--space-lg);
}

.form-group {
    margin-bottom: var(--space-md);
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: var(--space-xs);
    color: var(--color-text);
}

.form-group label span {
    color: #EF4444;
}

.form-control {
    width: 100%;
    height: 48px;
    padding: 0 var(--space-sm);
    font-size: 14px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    background-color: var(--color-bg);
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--color-primary);
    background-color: var(--color-white);
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1);
}

textarea.form-control {
    height: 120px;
    padding: var(--space-sm);
    resize: vertical;
}

.form-submit {
    margin-top: var(--space-md);
}

.form-submit .btn {
    width: 100%;
}

/* ==================== 移动端菜单 ==================== */
.mobile-menu {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100vh;
    background-color: var(--color-white);
    z-index: 999;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-lg);
    transform: translateX(100%);
    transition:var(--transition);
}

.mobile-menu.active {
    transform: translateX(0);
}

.mobile-menu-close {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-xs);
}

.mobile-menu-close svg {
    width: 24px;
    height: 24px;
}

.mobile-menu a {
    font-size: 24px;
    font-weight: 600;
    color: var(--color-secondary);
}

/* ==================== 动画 ==================== */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.stagger-1 { transition-delay: 0.1s; }
.stagger-2 { transition-delay: 0.2s; }
.stagger-3 { transition-delay: 0.3s; }
.stagger-4 { transition-delay: 0.4s; }

/* ==================== 工具类 ==================== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }

.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

.hidden { display: none; }
.visible { display: block; }

/* ==================== 资质荣誉区块 ==================== */
.qualifications-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--space-md);
    margin-top: var(--space-xl);
}

@media (max-width: 768px) {
    .qualifications-stats {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .qualifications-stats {
        grid-template-columns: 1fr;
    }
}

.qual-stat-item {
    text-align: center;
    padding: var(--space-lg) var(--space-md);
    background: linear-gradient(135deg, #F8FAFC 0%, #F1F5F9 100%);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    transition: var(--transition);
}

.qual-stat-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary);
}

.qual-stat-number {
    font-family: 'Montserrat', sans-serif;
    font-size: 48px;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1;
    margin-bottom: var(--space-xs);
}

.qual-stat-number span {
    font-size: 28px;
    color: var(--color-primary);
}

.qual-stat-label {
    font-size: 16px;
    font-weight: 500;
    color: var(--color-text);
}

/* 专利证书区块 */
.patent-section {
    margin-top: var(--space-lg);
}

.patent-type-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--color-secondary);
    margin-bottom: var(--space-md);
    padding-bottom: var(--space-xs);
    border-bottom: 2px solid var(--color-primary);
    display: inline-block;
}

.patent-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
}

@media (max-width: 1024px) {
    .patent-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 576px) {
    .patent-grid {
        grid-template-columns: 1fr;
    }
}

.patent-card {
    background-color: var(--color-white);
    padding: var(--space-md);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.patent-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: var(--color-primary);
}

.patent-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #10B981 0%, #059669 100%);
    border-radius: var(--radius-md);
    color: var(--color-white);
    margin-bottom: var(--space-sm);
}

.patent-icon svg {
    width: 24px;
    height: 24px;
}

.patent-card h4 {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-secondary);
    margin-bottom: var(--space-xs);
    line-height: 1.4;
}

.patent-inventors {
    font-size: 13px;
    color: var(--color-text-light);
    margin: 0;
}

/* 关联企业区块 */
.company-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
    margin-top: var(--space-xl);
}

@media (max-width: 768px) {
    .company-grid {
        grid-template-columns: 1fr;
    }
}

.company-card {
    background-color: var(--color-white);
    padding: var(--space-lg);
    border-radius: var(--radius-xl);
    border: 1px solid var(--color-border);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.company-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--color-primary), var(--color-primary-light));
}

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

.company-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    border-radius: var(--radius-lg);
    color: var(--color-white);
    margin-bottom: var(--space-md);
}

.company-icon svg {
    width: 32px;
    height: 32px;
}

.company-card h4 {
    font-size: 20px;
    font-weight: 600;
    color: var(--color-secondary);
    margin-bottom: var(--space-xs);
    line-height: 1.4;
}

.company-desc {
    font-size: 14px;
    color: var(--color-primary);
    font-weight: 500;
    margin-bottom: var(--space-md);
}

.company-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
    padding-top: var(--space-md);
    border-top: 1px solid var(--color-border);
}

.company-info-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.company-info-label {
    font-size: 14px;
    color: var(--color-text-light);
}

.company-info-value {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text);
}

/* ==================== 核心优势标签页 ==================== */
.advantages-tabs {
    margin-top: var(--space-xl);
}

.tab-buttons {
    display: flex;
    justify-content: center;
    gap: var(--space-md);
    flex-wrap: wrap;
    margin-bottom: var(--space-xl);
}

.tab-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-md) var(--space-lg);
    background-color: var(--color-white);
    border: 2px solid var(--color-border);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: var(--transition);
    min-width: 160px;
}

.tab-btn:hover {
    border-color: var(--color-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

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

.tab-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: var(--color-bg);
    border-radius: 50%;
    transition: var(--transition);
}

.tab-btn.active .tab-icon {
    background-color: rgba(255, 255, 255, 0.2);
}

.tab-text {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-secondary);
}

.tab-btn.active .tab-text {
    color: var(--color-white);
}

.tab-subtitle {
    font-size: 12px;
    color: var(--color-text-muted);
}

.tab-btn.active .tab-subtitle {
    color: rgba(255, 255, 255, 0.8);
}

.tab-contents {
    position: relative;
}

.tab-content {
    display: none;
    animation: fadeIn 0.5s ease;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.advantage-detail {
    background-color: var(--color-white);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    box-shadow: var(--shadow-md);
}

.advantage-features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}

@media (max-width: 768px) {
    .advantage-features {
        grid-template-columns: 1fr;
    }
    
    .tab-buttons {
        gap: var(--space-sm);
    }
    
    .tab-btn {
        min-width: 140px;
        padding: var(--space-sm) var(--space-md);
    }
}

.advantage-item {
    text-align: center;
    padding: var(--space-md);
}

.advantage-icon {
    width: 72px;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    border-radius: 50%;
    margin: 0 auto var(--space-md);
    color: var(--color-white);
}

.advantage-item h4 {
    font-size: 18px;
    font-weight: 600;
    color: var(--color-secondary);
    margin-bottom: var(--space-sm);
}

.advantage-item p {
    font-size: 14px;
    color: var(--color-text-light);
    line-height: 1.6;
}

/* ==================== 成功案例 ==================== */
.success-cases {
    background-color: #F8FAFC;
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-lg);
    margin-top: var(--space-xl);
}

@media (max-width: 768px) {
    .cases-grid {
        grid-template-columns: 1fr;
    }
}

.case-card {
    background-color: var(--color-white);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

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

.case-image {
    height: 200px;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.case-number {
    font-family: 'Montserrat', sans-serif;
    font-size: 72px;
    font-weight: 900;
    color: rgba(255, 255, 255, 0.2);
    line-height: 1;
}

.case-content {
    padding: var(--space-lg);
}

.case-tag {
    display: inline-block;
    padding: 4px 12px;
    background-color: var(--color-primary);
    color: var(--color-white);
    font-size: 12px;
    font-weight: 600;
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-sm);
}

.case-card:nth-child(2) .case-tag {
    background-color: var(--color-secondary);
}

.case-card:nth-child(3) .case-tag {
    background-color: #78716C;
}

.case-card:nth-child(4) .case-tag {
    background-color: #059669;
}

.case-content h4 {
    font-size: 20px;
    font-weight: 700;
    color: var(--color-secondary);
    margin-bottom: var(--space-sm);
}

.case-product {
    font-size: 14px;
    color: var(--color-text);
    font-weight: 500;
    margin-bottom: var(--space-xs);
}

.case-effect {
    font-size: 14px;
    color: var(--color-text-light);
    line-height: 1.6;
}

.case-products {
    display: flex;
    flex-direction: column;
    gap: var(--space-xs);
}

.case-products p {
    font-size: 14px;
    color: var(--color-text);
    padding-left: var(--space-sm);
    border-left: 2px solid var(--color-primary);
}

/* ==================== 产品分类详细说明 ==================== */
.product-categories-detail {
    background-color: #F8FAFC;
}

.category-detail-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
    margin-top: var(--space-xl);
}

.category-detail-item {
    background-color: var(--color-white);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.category-detail-item:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.category-detail-content {
    max-width: 900px;
    margin: 0 auto;
}

.category-detail-icon {
    width: 72px;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-dark) 100%);
    border-radius: var(--radius-lg);
    color: var(--color-white);
    margin-bottom: var(--space-md);
}

.category-detail-content h3 {
    font-size: 22px;
    font-weight: 700;
    color: var(--color-secondary);
    margin-bottom: var(--space-sm);
}

.category-detail-content > p {
    font-size: 15px;
    color: var(--color-text-light);
    line-height: 1.8;
    margin-bottom: var(--space-md);
}

.category-detail-features {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.category-detail-features li {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: 8px 16px;
    background-color: var(--color-bg);
    border-radius: var(--radius-md);
    font-size: 14px;
    color: var(--color-text);
    font-weight: 500;
}

.category-detail-features li::before {
    content: '';
    width: 6px;
    height: 6px;
    background-color: var(--color-primary);
    border-radius: 50%;
}

@media (max-width: 768px) {
    .category-detail-item {
        padding: var(--space-lg);
    }
    
    .category-detail-content h3 {
        font-size: 18px;
    }
    
    .category-detail-features {
        flex-direction: column;
    }
}

/* ==================== 证书展示区域 ==================== */
.certificate-gallery {
    margin-top: 48px;
}

.certificate-gallery h3 {
    font-size: 20px;
    margin-bottom: 24px;
    color: var(--color-secondary);
    text-align: center;
}

.certificate-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.certificate-item {
    position: relative;
    overflow: hidden;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    cursor: pointer;
    transition: var(--transition);
    background-color: var(--color-bg);
}

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

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

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

.certificate-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 16px;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.7));
    color: white;
    opacity: 0;
    transition: var(--transition);
}

.certificate-item:hover .certificate-overlay {
    opacity: 1;
}

.certificate-overlay h4 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 4px;
    color: white;
}

.certificate-overlay p {
    font-size: 12px;
    color: rgba(255, 255, 255, 0.8);
}

/* 证书灯箱效果 */
.certificate-lightbox {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.9);
    z-index: 9999;
    justify-content: center;
    align-items: center;
    padding: 40px;
}

.certificate-lightbox.active {
    display: flex;
}

.certificate-lightbox img {
    max-width: 90%;
    max-height: 90vh;
    object-fit: contain;
    border-radius: var(--radius-md);
}

.certificate-lightbox-close {
    position: absolute;
    top: 20px;
    right: 20px;
    width: 40px;
    height: 40px;
    background-color: rgba(255, 255, 255, 0.2);
    border: none;
    border-radius: 50%;
    color: white;
    font-size: 24px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.certificate-lightbox-close:hover {
    background-color: rgba(255, 255, 255, 0.3);
}

@media (max-width: 768px) {
    .certificate-grid {
        grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
        gap: 16px;
    }
    
    .certificate-item {
        aspect-ratio: 1;
    }
}

/* ==================== 语言切换按钮 ==================== */
.lang-switch {
    height: 36px;
    padding: 0 12px;
    background-color: transparent;
    border: 2px solid rgba(255, 255, 255, 0.6);
    border-radius: var(--radius-md);
    color: var(--color-white);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    margin-left: 12px;
}

.navbar.scrolled .lang-switch {
    border-color: var(--color-secondary);
    color: var(--color-secondary);
}

.lang-switch:hover {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
    color: var(--color-white);
}

@media (max-width: 768px) {
    .lang-switch {
        display: none;
    }
}