/* ============================================
   泰合生物 Taihe Biotech - 现代化门户网站样式
   主题色: rgb(191, 50, 89)
   ============================================ */

/* CSS变量定义 */
:root {
    --primary-color: rgb(191, 50, 89);
    --primary-dark: rgb(160, 40, 75);
    --primary-light: rgb(220, 80, 120);
    --secondary-color: #1a1a2e;
    --text-dark: #2d2d2d;
    --text-light: #666;
    --text-muted: #999;
    --bg-light: #f8f9fa;
    --bg-white: #ffffff;
    --border-color: #e0e0e0;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 8px 30px rgba(0, 0, 0, 0.12);
    --transition: all 0.3s ease;
    --border-radius: 8px;
    --border-radius-lg: 16px;
}

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

html {
    scroll-behavior: smooth;
}

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

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

ul {
    list-style: none;
}

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

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

/* ============================================
   按钮样式
   ============================================ */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    font-size: 16px;
    font-weight: 500;
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    gap: 8px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
    box-shadow: 0 4px 15px rgba(191, 50, 89, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(191, 50, 89, 0.4);
}

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

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

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

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

.btn-outline-white {
    background: transparent;
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.5);
}

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

/* ============================================
   导航栏
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.nav-brand a {
    display: flex;
    flex-direction: column;
}

.logo-text {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
    line-height: 1.2;
}

.logo-sub {
    font-size: 12px;
    color: var(--text-muted);
    letter-spacing: 1px;
    text-transform: uppercase;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 40px;
}

.nav-menu > li > a {
    font-size: 15px;
    font-weight: 500;
    color: var(--text-dark);
    position: relative;
    padding: 8px 0;
}

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

.nav-menu > li > a:hover::after,
.nav-menu > li > a.active::after {
    width: 100%;
}

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

/* 下拉菜单 */
.dropdown {
    position: relative;
}

.dropdown > a i {
    font-size: 12px;
    margin-left: 4px;
    transition: var(--transition);
}

.dropdown:hover > a i {
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: white;
    min-width: 200px;
    padding: 10px 0;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-hover);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition);
}

.dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu li a {
    display: block;
    padding: 10px 20px;
    font-size: 14px;
    color: var(--text-dark);
}

.dropdown-menu li a:hover {
    background: var(--bg-light);
    color: var(--primary-color);
}

.nav-contact .phone-link {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--primary-color);
    font-weight: 600;
    font-size: 15px;
}

.nav-contact .phone-link i {
    font-size: 18px;
}

.nav-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    color: var(--text-dark);
    cursor: pointer;
}

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

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--secondary-color) 0%, #16213e 100%);
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 25, 50, 0.65);
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(191, 50, 89, 0.15) 0%, transparent 70%);
    border-radius: 50%;
}

.hero-content {
    position: relative;
    z-index: 1;
    padding-top: 80px;
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.hero-title {
    margin-bottom: 24px;
}

.hero-title .highlight {
    display: block;
    font-size: 24px;
    font-weight: 400;
    color: var(--primary-light);
    margin-bottom: 8px;
    letter-spacing: 4px;
}

.hero-title .sub-title {
    display: block;
    font-size: 48px;
    font-weight: 300;
    color: white;
    margin-bottom: 8px;
    letter-spacing: 8px;
}

.hero-title .main-title {
    display: block;
    font-size: 72px;
    font-weight: 700;
    color: white;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.hero-desc {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 40px;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-bottom: 60px;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
}

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

.stat-number {
    display: block;
    font-size: 36px;
    font-weight: 700;
    color: white;
    margin-bottom: 4px;
}

.stat-label {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    color: rgba(255, 255, 255, 0.5);
    font-size: 24px;
    animation: bounce 2s infinite;
}

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

/* ============================================
   Section通用样式
   ============================================ */
section {
    padding: 100px 0;
}

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

.section-header.light {
    color: white;
}

.section-tag {
    display: inline-block;
    font-size: 14px;
    font-weight: 600;
    color: var(--primary-color);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 12px;
}

.section-header.light .section-tag {
    color: var(--primary-light);
}

.section-title {
    font-size: 42px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 16px;
}

.section-header.light .section-title {
    color: white;
}

.section-desc {
    font-size: 18px;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
}

.section-header.light .section-desc {
    color: rgba(255, 255, 255, 0.7);
}

/* ============================================
   Services Section
   ============================================ */
.services-section {
    background: var(--bg-light);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.service-card {
    background: white;
    padding: 40px 30px;
    border-radius: var(--border-radius-lg);
    text-align: center;
    transition: var(--transition);
    box-shadow: var(--shadow);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
    transform: scaleX(0);
    transition: var(--transition);
}

.service-card:hover::before {
    transform: scaleX(1);
}

.service-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.service-card.featured {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
}

.service-card.featured .service-icon {
    background: rgba(255, 255, 255, 0.2);
    color: white;
}

.service-icon {
    width: 80px;
    height: 80px;
    background: var(--bg-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    font-size: 32px;
    color: var(--primary-color);
    transition: var(--transition);
}

.service-card:hover .service-icon {
    transform: scale(1.1);
}

.service-card h3 {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 16px;
}

.service-card p {
    font-size: 15px;
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 20px;
}

.service-card.featured p {
    color: rgba(255, 255, 255, 0.9);
}

.service-link {
    font-size: 14px;
    font-weight: 600;
    color: var(--primary-color);
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.service-card.featured .service-link {
    color: white;
}

.service-link i {
    transition: var(--transition);
}

.service-link:hover i {
    transform: translateX(4px);
}

/* ============================================
   About Section
   ============================================ */
.about-section {
    background: white;
}

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-images {
    position: relative;
}

.image-main {
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-hover);
}

.image-main img {
    width: 100%;
    height: 400px;
    object-fit: cover;
}

.image-sub {
    position: absolute;
    bottom: -30px;
    right: -30px;
    width: 250px;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-hover);
    border: 5px solid white;
}

.image-sub img {
    width: 100%;
    height: 180px;
    object-fit: cover;
}

.experience-badge {
    position: absolute;
    top: 30px;
    left: -30px;
    background: var(--primary-color);
    color: white;
    padding: 20px 30px;
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: var(--shadow-hover);
}

.experience-badge .years {
    display: block;
    font-size: 36px;
    font-weight: 700;
    line-height: 1;
}

.experience-badge .text {
    font-size: 14px;
    opacity: 0.9;
}

.about-content .section-title {
    text-align: left;
}

.about-text {
    font-size: 16px;
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 20px;
}

.about-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin: 30px 0;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 15px;
    color: var(--text-dark);
}

.feature-item i {
    color: var(--primary-color);
    font-size: 18px;
}

/* ============================================
   Products Section
   ============================================ */
.products-section {
    background: var(--bg-light);
}

.products-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 24px;
}

.product-card {
    position: relative;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

.product-card.large {
    grid-row: span 1;
}

.product-image {
    position: relative;
    height: 100%;
    min-height: 350px;
}

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

.product-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.8) 0%, rgba(0,0,0,0.2) 50%, transparent 100%);
}

.product-info {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 30px;
    color: white;
}

.product-tag {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--primary-light);
    margin-bottom: 8px;
}

.product-info h3 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 8px;
}

.product-info p {
    font-size: 14px;
    opacity: 0.9;
    margin-bottom: 16px;
}

.product-link {
    display: inline-block;
    padding: 10px 24px;
    background: var(--primary-color);
    color: white;
    border-radius: 50px;
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
}

.product-link:hover {
    background: var(--primary-dark);
}

/* ============================================
   Certifications Section
   ============================================ */
.certifications-section {
    background: linear-gradient(135deg, var(--secondary-color) 0%, #16213e 100%);
    position: relative;
    overflow: hidden;
}

.certifications-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('../images/pattern.png') center/cover;
    opacity: 0.05;
}

.certifications-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    position: relative;
    z-index: 1;
}

.cert-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-lg);
    padding: 40px 30px;
    text-align: center;
    transition: var(--transition);
}

.cert-card:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-5px);
}

.cert-card:hover h4 {
    color: white;
}

.cert-card:hover p {
    color: rgba(255, 255, 255, 0.6);
}

.cert-icon {
    width: 70px;
    height: 70px;
    background: rgba(191, 50, 89, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 28px;
    color: var(--primary-light);
}

.cert-card h4 {
    font-size: 18px;
    font-weight: 600;
    color: #1a2744;
    margin-bottom: 8px;
}

.cert-card p {
    font-size: 14px;
    color: #5a6a7e;
}

/* ============================================
   R&D Section
   ============================================ */
.rd-section {
    background: white;
}

.rd-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.rd-content .section-title {
    text-align: left;
}

.rd-text {
    font-size: 16px;
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 30px;
}

.rd-features {
    display: flex;
    flex-direction: column;
    gap: 24px;
    margin-bottom: 30px;
}

.rd-item {
    display: flex;
    gap: 20px;
}

.rd-icon {
    width: 60px;
    height: 60px;
    background: var(--bg-light);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: var(--primary-color);
    flex-shrink: 0;
}

.rd-info h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 6px;
}

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

.rd-images {
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-hover);
}

.rd-images img {
    width: 100%;
    height: 500px;
    object-fit: cover;
}

/* ============================================
   Partners Section
   ============================================ */
.partners-section {
    background: var(--bg-light);
}

.partners-slider {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 40px;
    flex-wrap: wrap;
}

.partner-logo {
    width: 150px;
    height: 80px;
    background: white;
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    overflow: hidden;
    /* filter: grayscale(100%); */
    /* opacity: 0.6; */
}

.partner-logo:hover {
    /* filter: grayscale(0); */
    /* opacity: 1; */
    transform: translateY(-3px);
}

.partner-logo span {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-muted);
}

/* ============================================
   CTA Section
   ============================================ */
.cta-section {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    padding: 80px 0;
    text-align: center;
}

.cta-content h2 {
    font-size: 36px;
    font-weight: 700;
    color: white;
    margin-bottom: 16px;
}

.cta-content p {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 32px;
}

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

/* ============================================
   Footer
   ============================================ */
.footer {
    background: var(--secondary-color);
    color: white;
    padding: 80px 0 0;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1.5fr;
    gap: 60px;
    margin-bottom: 60px;
}

.footer-brand h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 16px;
}

.footer-desc {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.7;
    margin-bottom: 24px;
}

.footer-social {
    display: flex;
    gap: 16px;
}

.footer-social a {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    color: white;
    transition: var(--transition);
}

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

.footer-links h4,
.footer-contact h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 24px;
    color: white;
}

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

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

.footer-links ul li a:hover {
    color: var(--primary-light);
    padding-left: 4px;
}

.footer-contact ul li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 16px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.6);
}

.footer-contact ul li i {
    color: var(--primary-light);
    margin-top: 4px;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding: 24px 0;
    text-align: center;
}

.footer-bottom p {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.5);
}

/* ============================================
   响应式设计
   ============================================ */
@media (max-width: 1024px) {
    .services-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .products-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .product-card.large {
        grid-column: span 2;
    }
    
    .certifications-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .about-grid,
    .rd-grid {
        grid-template-columns: 1fr;
        gap: 60px;
    }
    
    .rd-images {
        order: -1;
    }
    
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 768px) {
    .nav-toggle {
        display: block;
    }
    
    .nav-menu {
        position: fixed;
        top: 80px;
        left: 0;
        right: 0;
        background: white;
        flex-direction: column;
        padding: 20px;
        gap: 0;
        box-shadow: var(--shadow);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-menu > li {
        width: 100%;
    }
    
    .nav-menu > li > a {
        display: block;
        padding: 15px 0;
        border-bottom: 1px solid var(--border-color);
    }
    
    .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        padding-left: 20px;
        display: none;
    }
    
    .dropdown.active .dropdown-menu {
        display: block;
    }
    
    .nav-contact {
        display: none;
    }
    
    .hero-title .sub-title {
        font-size: 32px;
    }
    
    .hero-title .main-title {
        font-size: 48px;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 30px;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .services-grid,
    .products-grid,
    .certifications-grid {
        grid-template-columns: 1fr;
    }
    
    .product-card.large {
        grid-column: span 1;
    }
    
    .about-features {
        grid-template-columns: 1fr;
    }
    
    .image-sub {
        display: none;
    }
    
    .experience-badge {
        left: 20px;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .cta-buttons {
        flex-direction: column;
    }
    
    section {
        padding: 60px 0;
    }
    
    .section-title {
        font-size: 32px;
    }
}

@media (max-width: 480px) {
    .hero-title .sub-title {
        font-size: 24px;
        letter-spacing: 4px;
    }
    
    .hero-title .main-title {
        font-size: 36px;
    }
    
    .hero-desc {
        font-size: 16px;
    }
    
    .section-title {
        font-size: 28px;
    }
}

/* ============================================
   页面头部样式
   ============================================ */
.page-header {
    background: linear-gradient(135deg, var(--secondary-color) 0%, #16213e 100%);
    padding: 160px 0 80px;
    text-align: center;
    color: white;
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('../images/pattern.png') center/cover;
    opacity: 0.05;
}

.page-header h1 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 16px;
    position: relative;
    z-index: 1;
}

.breadcrumb {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 12px;
    font-size: 14px;
    color: rgba(255, 255, 255, 0.7);
    position: relative;
    z-index: 1;
}

.breadcrumb a {
    color: rgba(255, 255, 255, 0.9);
}

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

/* ============================================
   关于我们页面样式
   ============================================ */
.about-detail {
    background: white;
    padding: 100px 0;
}

.about-detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.about-detail-content .section-title {
    text-align: left;
    margin-bottom: 24px;
}

.about-detail-text {
    font-size: 16px;
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 20px;
}

.about-mission {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-top: 40px;
}

.mission-item {
    display: flex;
    gap: 16px;
    padding: 24px;
    background: var(--bg-light);
    border-radius: var(--border-radius);
}

.mission-item i {
    font-size: 24px;
    color: var(--primary-color);
}

.mission-item h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 6px;
}

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

.about-detail-images {
    position: relative;
}

.detail-image-main {
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-hover);
}

.detail-image-main img {
    width: 100%;
    height: 400px;
    object-fit: cover;
}

.detail-image-sub {
    position: absolute;
    bottom: -30px;
    right: -30px;
    width: 250px;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-hover);
    border: 5px solid white;
}

.detail-image-sub img {
    width: 100%;
    height: 180px;
    object-fit: cover;
}

/* 核心优势 */
.advantages-section {
    background: var(--bg-light);
    padding: 100px 0;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.advantage-card {
    background: white;
    padding: 40px 30px;
    border-radius: var(--border-radius-lg);
    text-align: center;
    transition: var(--transition);
    box-shadow: var(--shadow);
}

.advantage-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.advantage-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    font-size: 32px;
    color: white;
}

.advantage-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
}

.advantage-card p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
}

/* 发展历程 */
.timeline-section {
    background: white;
    padding: 100px 0;
}

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

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 100%;
    background: var(--border-color);
}

.timeline-item {
    display: flex;
    justify-content: flex-end;
    padding-right: 50%;
    position: relative;
    margin-bottom: 50px;
}

.timeline-item:nth-child(even) {
    justify-content: flex-start;
    padding-right: 0;
    padding-left: 50%;
}

.timeline-year {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 60px;
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 14px;
    z-index: 1;
}

.timeline-content {
    background: var(--bg-light);
    padding: 24px 30px;
    border-radius: var(--border-radius);
    max-width: 300px;
    margin-right: 40px;
}

.timeline-item:nth-child(even) .timeline-content {
    margin-right: 0;
    margin-left: 40px;
}

.timeline-content h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--primary-color);
}

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

/* 团队介绍 */
.team-section {
    background: var(--bg-light);
    padding: 100px 0;
}

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

.team-card {
    background: white;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.team-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.team-image {
    height: 200px;
    overflow: hidden;
}

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

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

.team-info {
    padding: 24px;
    text-align: center;
}

.team-info h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 4px;
}

.team-role {
    font-size: 14px;
    color: var(--primary-color);
    font-weight: 500;
    margin-bottom: 12px;
}

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

/* ============================================
   产品服务页面样式
   ============================================ */
.service-models {
    background: var(--bg-light);
    padding: 100px 0;
}

.service-models-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.service-model-card {
    background: white;
    padding: 40px 30px;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.service-model-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--primary-light));
    transform: scaleX(0);
    transition: var(--transition);
}

.service-model-card:hover::before {
    transform: scaleX(1);
}

.service-model-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.service-model-card.featured {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: white;
}

.service-model-card.featured::before {
    background: rgba(255, 255, 255, 0.3);
}

.service-model-icon {
    width: 70px;
    height: 70px;
    background: var(--bg-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    font-size: 28px;
    color: var(--primary-color);
}

.service-model-card.featured .service-model-icon {
    background: rgba(255, 255, 255, 0.2);
    color: white;
}

.service-model-card h3 {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 16px;
}

.service-model-desc {
    font-size: 15px;
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 24px;
}

.service-model-card.featured .service-model-desc {
    color: rgba(255, 255, 255, 0.9);
}

.service-features {
    list-style: none;
}

.service-features li {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: var(--text-dark);
    margin-bottom: 10px;
}

.service-model-card.featured .service-features li {
    color: rgba(255, 255, 255, 0.9);
}

.service-features li i {
    color: var(--primary-color);
    font-size: 12px;
}

.service-model-card.featured .service-features li i {
    color: rgba(255, 255, 255, 0.8);
}

/* 产品分类 */
.product-category {
    background: white;
    padding: 100px 0;
}

.product-category.alt {
    background: var(--bg-light);
}

.category-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 50px;
}

.category-tag {
    display: inline-block;
    font-size: 14px;
    font-weight: 600;
    color: var(--primary-color);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 8px;
}

.category-info h2 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 8px;
}

.category-info p {
    font-size: 16px;
    color: var(--text-light);
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.category-card {
    background: white;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.category-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.category-image {
    height: 200px;
    overflow: hidden;
}

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

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

.category-content {
    padding: 24px;
}

.category-content h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
}

.category-content p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.6;
    margin-bottom: 16px;
}

.category-features {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.category-features li {
    font-size: 12px;
    padding: 4px 12px;
    background: var(--bg-light);
    border-radius: 20px;
    color: var(--text-light);
}

/* 服务流程 */
.process-section {
    background: white;
    padding: 100px 0;
}

.process-steps {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.process-step {
    text-align: center;
    width: 180px;
}

.step-number {
    font-size: 48px;
    font-weight: 700;
    color: rgba(191, 50, 89, 0.1);
    line-height: 1;
    margin-bottom: -20px;
}

.step-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    font-size: 28px;
    color: white;
}

.process-step h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
}

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

.process-arrow {
    color: var(--primary-color);
    font-size: 24px;
}

/* ============================================
   联系我们页面样式
   ============================================ */
.contact-info-section {
    background: var(--bg-light);
    padding: 80px 0;
}

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

.contact-info-card {
    text-align: center;
    padding: 40px 30px;
    background: var(--bg-light);
    border-radius: var(--border-radius-lg);
    transition: var(--transition);
}

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

.contact-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 28px;
    color: white;
}

.contact-info-card h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 12px;
}

.contact-info-card p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
}

/* 联系表单 */
.contact-form-section {
    background: white;
    padding: 100px 0;
}

.contact-form-grid {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 80px;
    align-items: start;
}

.contact-form-content .section-title {
    text-align: left;
    margin-bottom: 20px;
}

.contact-desc {
    font-size: 16px;
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 30px;
}

.contact-features {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.contact-feature {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 15px;
    color: var(--text-dark);
}

.contact-feature i {
    color: var(--primary-color);
    font-size: 20px;
}

.contact-form-wrapper {
    background: white;
    padding: 40px;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow);
}

.contact-form .form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

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

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    margin-bottom: 8px;
    color: var(--text-dark);
}

.form-group .required {
    color: var(--primary-color);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 14px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 15px;
    font-family: inherit;
    transition: var(--transition);
    background: white;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(191, 50, 89, 0.1);
}

.form-group input.error,
.form-group select.error,
.form-group textarea.error {
    border-color: var(--primary-color);
}

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

.btn-submit {
    width: 100%;
    padding: 16px;
    font-size: 16px;
}

/* 地图区域 */
.map-section {
    background: white;
    padding: 100px 0;
}

.map-wrapper {
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.map-placeholder {
    height: 400px;
    background: var(--bg-light);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
}

.map-placeholder i {
    font-size: 48px;
    color: var(--primary-color);
    margin-bottom: 16px;
}

.map-placeholder p {
    font-size: 16px;
    margin-bottom: 8px;
}

.map-placeholder .map-address {
    font-size: 14px;
    color: var(--text-muted);
}

/* 常见问题 */
.faq-section {
    background: var(--bg-light);
    padding: 100px 0;
}

.faq-grid {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.faq-item {
    background: white;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 30px;
    cursor: pointer;
    transition: var(--transition);
}

.faq-question:hover {
    background: var(--bg-light);
}

.faq-question h4 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-dark);
}

.faq-question i {
    color: var(--primary-color);
    transition: var(--transition);
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.faq-item.active .faq-answer {
    max-height: 200px;
}

.faq-answer p {
    padding: 0 30px 24px;
    font-size: 15px;
    color: var(--text-light);
    line-height: 1.7;
}

/* ============================================
   响应式调整
   ============================================ */
@media (max-width: 1024px) {
    .about-detail-grid {
        grid-template-columns: 1fr;
        gap: 60px;
    }
    
    .about-detail-images {
        order: -1;
    }
    
    .detail-image-sub {
        display: none;
    }
    
    .advantages-grid,
    .service-models-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .team-grid,
    .category-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .contact-info-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .contact-form-grid {
        grid-template-columns: 1fr;
        gap: 60px;
    }
    
    .timeline::before {
        left: 30px;
    }
    
    .timeline-item,
    .timeline-item:nth-child(even) {
        justify-content: flex-start;
        padding-left: 80px;
        padding-right: 0;
    }
    
    .timeline-year {
        left: 30px;
        transform: translateX(-50%);
    }
    
    .timeline-content,
    .timeline-item:nth-child(even) .timeline-content {
        margin-left: 0;
        margin-right: 0;
        max-width: 100%;
    }
    
    .process-steps {
        flex-direction: column;
    }
    
    .process-arrow {
        transform: rotate(90deg);
    }
    
    .category-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 20px;
    }
}

@media (max-width: 768px) {
    .page-header {
        padding: 120px 0 60px;
    }
    
    .page-header h1 {
        font-size: 36px;
    }
    
    .about-mission {
        grid-template-columns: 1fr;
    }
    
    .advantages-grid,
    .service-models-grid,
    .team-grid,
    .category-grid,
    .contact-info-grid {
        grid-template-columns: 1fr;
    }
    
    .contact-form .form-row {
        grid-template-columns: 1fr;
    }
    
    .contact-form-wrapper {
        padding: 30px 20px;
    }
    
    .faq-question {
        padding: 20px;
    }
    
    .faq-answer p {
        padding: 0 20px 20px;
    }
}

/* ============================================
   研发实力页面样式
   ============================================ */
.rd-overview {
    background: white;
    padding: 100px 0;
}

.rd-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.rd-content .section-title {
    text-align: left;
    margin-bottom: 24px;
}

.rd-text {
    font-size: 16px;
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 20px;
}

.rd-stats {
    display: flex;
    gap: 40px;
    margin-top: 40px;
    padding-top: 40px;
    border-top: 1px solid var(--border-color);
}

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

.rd-stat-number {
    font-size: 48px;
    font-weight: 700;
    color: var(--primary-color);
    line-height: 1;
}

.rd-stat-unit {
    font-size: 24px;
    font-weight: 600;
    color: var(--primary-color);
}

.rd-stat-label {
    display: block;
    font-size: 14px;
    color: var(--text-light);
    margin-top: 8px;
}

.rd-images img {
    width: 100%;
    height: 500px;
    object-fit: cover;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-hover);
}

/* 研发团队 */
.rd-team-section {
    background: var(--bg-light);
    padding: 100px 0;
}

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

.rd-team-card {
    background: white;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.rd-team-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.rd-team-image {
    height: 220px;
    overflow: hidden;
}

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

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

.rd-team-info {
    padding: 24px;
}

.rd-team-info h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 4px;
}

.rd-team-role {
    font-size: 14px;
    color: var(--primary-color);
    font-weight: 500;
    margin-bottom: 12px;
}

.rd-team-desc {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.6;
}

/* 研发能力 */
.rd-capability {
    background: white;
    padding: 100px 0;
}

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

.capability-card {
    background: var(--bg-light);
    padding: 40px 30px;
    border-radius: var(--border-radius-lg);
    transition: var(--transition);
}

.capability-card:hover {
    background: white;
    box-shadow: var(--shadow-hover);
    transform: translateY(-10px);
}

.capability-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 24px;
    font-size: 28px;
    color: white;
}

.capability-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
}

.capability-card > p {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 20px;
}

.capability-card ul {
    list-style: none;
}

.capability-card ul li {
    font-size: 14px;
    color: var(--text-light);
    padding: 8px 0;
    border-bottom: 1px solid var(--border-color);
}

.capability-card ul li:last-child {
    border-bottom: none;
}

/* 实验室展示 */
.lab-showcase {
    background: var(--bg-light);
    padding: 100px 0;
}

.lab-gallery {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-template-rows: repeat(2, 250px);
    gap: 20px;
}

.lab-item {
    position: relative;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
}

.lab-item.large {
    grid-column: span 2;
    grid-row: span 2;
}

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

.lab-item:hover img {
    transform: scale(1.1);
}

.lab-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 24px;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
    color: white;
}

.lab-overlay h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 4px;
}

.lab-overlay p {
    font-size: 14px;
    opacity: 0.9;
}

/* 研发流程 */
.rd-process {
    background: white;
    padding: 100px 0;
}

.process-timeline {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.process-timeline-item {
    display: flex;
    align-items: flex-start;
    gap: 30px;
}

.process-timeline-number {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    font-weight: 700;
    color: white;
    flex-shrink: 0;
}

.process-timeline-content {
    flex: 1;
    padding: 24px 30px;
    background: var(--bg-light);
    border-radius: var(--border-radius-lg);
}

.process-timeline-content h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--primary-color);
}

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

/* ============================================
   资质认证页面样式
   ============================================ */
.cert-overview {
    background: white;
    padding: 100px 0;
}

.cert-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.cert-content .section-title {
    text-align: left;
    margin-bottom: 24px;
}

.cert-text {
    font-size: 16px;
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 20px;
}

.cert-highlights {
    margin-top: 40px;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.cert-highlight-item {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 15px;
    color: var(--text-dark);
}

.cert-highlight-item i {
    color: var(--primary-color);
    font-size: 20px;
}

.cert-image img {
    width: 100%;
    height: 400px;
    object-fit: cover;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-hover);
}

/* 主要认证 */
.main-certifications {
    background: var(--bg-light);
    padding: 100px 0;
}

.cert-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.cert-card {
    background: white;
    padding: 40px 30px;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-align: center;
}

.cert-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.main-certifications .cert-card:hover h3,
.main-certifications .cert-card:hover p,
.main-certifications .cert-card:hover .cert-card-subtitle,
.main-certifications .cert-card:hover .cert-card-desc,
.main-certifications .cert-card:hover .cert-feature {
    color: var(--primary-color);
}

.main-certifications .cert-card:hover .cert-feature {
    background: rgba(0, 0, 0, 0.1);
}

.cert-card-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    font-size: 32px;
    color: white;
}

.cert-card-content h3 {
    font-size: 28px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 4px;
}

.cert-card-subtitle {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 16px;
}

.cert-card-desc {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.7;
    margin-bottom: 20px;
}

.cert-card-features {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: center;
}

.cert-feature {
    font-size: 12px;
    padding: 6px 14px;
    background: var(--bg-light);
    border-radius: 20px;
    color: var(--text-light);
}

/* 专利成果 */
.patents-section {
    background: white;
    padding: 100px 0;
}

.patents-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
}

.patent-card {
    background: var(--bg-light);
    padding: 30px;
    border-radius: var(--border-radius-lg);
    border-left: 4px solid var(--primary-color);
    transition: var(--transition);
}

.patent-card:hover {
    background: white;
    box-shadow: var(--shadow-hover);
    transform: translateX(10px);
}

.patent-number {
    font-size: 12px;
    color: var(--primary-color);
    font-weight: 600;
    margin-bottom: 8px;
}

.patent-card h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
}

.patent-type {
    font-size: 12px;
    color: var(--text-muted);
    margin-bottom: 12px;
}

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

/* 质量管理 */
.quality-management {
    background: var(--bg-light);
    padding: 100px 0;
}

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

.quality-step {
    text-align: center;
    padding: 40px 30px;
    background: white;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.quality-step:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-hover);
}

.quality-step-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 28px;
    color: white;
}

.quality-step h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 12px;
}

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

/* 检测设备 */
.testing-equipment {
    background: white;
    padding: 100px 0;
}

.equipment-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.equipment-item {
    text-align: center;
    padding: 40px 30px;
    background: var(--bg-light);
    border-radius: var(--border-radius-lg);
    transition: var(--transition);
}

.equipment-item:hover {
    background: white;
    box-shadow: var(--shadow-hover);
    transform: translateY(-5px);
}

.equipment-icon {
    width: 60px;
    height: 60px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    font-size: 24px;
    color: white;
}

.equipment-item h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
}

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

/* ============================================
   响应式调整 - 研发与认证页面
   ============================================ */
@media (max-width: 1024px) {
    .rd-grid,
    .cert-grid {
        grid-template-columns: 1fr;
        gap: 60px;
    }
    
    .rd-images,
    .cert-image {
        order: -1;
    }
    
    .rd-team-grid,
    .capability-grid,
    .cert-cards,
    .quality-process {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .lab-gallery {
        grid-template-columns: repeat(2, 1fr);
        grid-template-rows: repeat(3, 200px);
    }
    
    .lab-item.large {
        grid-column: span 2;
        grid-row: span 1;
    }
    
    .patents-grid,
    .equipment-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .rd-stats {
        flex-direction: column;
        gap: 24px;
    }
    
    .rd-team-grid,
    .capability-grid,
    .cert-cards,
    .quality-process,
    .equipment-grid {
        grid-template-columns: 1fr;
    }
    
    .lab-gallery {
        grid-template-columns: 1fr;
        grid-template-rows: repeat(5, 200px);
    }
    
    .lab-item.large {
        grid-column: span 1;
    }
    
    .process-timeline-item {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .process-timeline-content {
        width: 100%;
    }
}

/* Language Switcher */
.lang-switcher {
    position: relative;
    margin-left: 10px;
}

.lang-switcher-btn {
    background: rgba(0,0,0,0.05);
    border: 1px solid rgba(0,0,0,0.2);
    color: var(--text-dark);
    padding: 8px 14px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: var(--transition);
}

.lang-switcher-btn:hover {
    background: rgba(0,0,0,0.1);
}

.lang-menu {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background: white;
    border-radius: 8px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.15);
    list-style: none;
    padding: 6px 0;
    min-width: 140px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all 0.2s ease;
    z-index: 1000;
}

.lang-menu.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.lang-option {
    display: block;
    width: 100%;
    padding: 10px 18px;
    border: none;
    background: none;
    text-align: left;
    font-size: 14px;
    color: #333;
    cursor: pointer;
    transition: background 0.15s;
}

.lang-option:hover {
    background: #f5f5f5;
}

.lang-option.active {
    color: var(--primary-color);
    font-weight: 600;
}