/* ============================================
   GUYOU FURNITURE - Premium Stylesheet
   Version: 2.0 | Modern & High-End Design
============================================= */

/* ========== CSS Variables & Reset ========== */
:root {
    /* Primary Colors - Premium Furniture Palette */
    --primary-dark: #1a365d;
    --primary-main: #2d3748;
    --primary-light: #4a5568;
    --accent-gold: #b89a5e;
    --accent-warm: #d4a574;
    
    /* Neutral Colors */
    --neutral-100: #ffffff;
    --neutral-200: #f7fafc;
    --neutral-300: #edf2f7;
    --neutral-400: #e2e8f0;
    --neutral-500: #cbd5e0;
    --neutral-600: #a0aec0;
    --neutral-700: #718096;
    --neutral-800: #4a5568;
    --neutral-900: #2d3748;
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-secondary: 'Playfair Display', Georgia, serif;
    
    /* Spacing */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 32px;
    --spacing-xl: 48px;
    --spacing-xxl: 64px;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;
}

/* ========== Global Reset & Base Styles ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-primary);
    color: var(--neutral-800);
    background-color: var(--neutral-100);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container-1350 {
    max-width: 1350px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
    width: 100%;
}

/* ========== Typography System ========== */
/* Heading Styles */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-secondary);
    color: var(--neutral-900);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    line-height: 1.2;
}

h1 {
    font-size: 42px;
    line-height: 1.2;
    letter-spacing: -0.5px;
}

h2 {
    font-size: 36px;
    line-height: 1.2;
    letter-spacing: -0.3px;
}

h3 {
    font-size: 28px;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

h4 {
    font-size: 24px;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
    color: var(--primary-main);
}

h5 {
    font-size: 20px;
    line-height: 1.4;
    margin-bottom: var(--spacing-xs);
}

h6 {
    font-size: 18px;
    line-height: 1.6;
    margin-bottom: var(--spacing-xs);
}

/* Paragraph & Text Styles */
p {
    font-size: 16px;
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
    color: var(--neutral-700);
}

.lead-text {
    font-size: 18px;
    line-height: 1.6;
    font-weight: 500;
    color: var(--neutral-800);
}

.small-text {
    font-size: 14px;
    line-height: 1.8;
    color: var(--neutral-600);
}

/* Link Styles */
a {
    color: var(--primary-main);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--accent-gold);
}

/* ========== Hero Banner ========== */
.premium-hero-banner {
    position: relative;
    padding: var(--spacing-xxl) 0 var(--spacing-xl);
    background-size: cover;
    background-position: center;
    color: var(--neutral-100);
    margin-bottom: var(--spacing-xxl);
}

.breadcrumb-nav {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-lg);
    font-size: 14px;
    line-height: 1.8;
}

.breadcrumb-nav a {
    color: rgba(255, 255, 255, 0.8);
    transition: color var(--transition-fast);
}

.breadcrumb-nav a:hover {
    color: var(--neutral-100);
}

.breadcrumb-nav .divider {
    color: rgba(255, 255, 255, 0.5);
}

.breadcrumb-nav .current {
    color: var(--neutral-100);
    font-weight: 500;
}

.hero-title {
    font-size: 48px;
    line-height: 1.1;
    color: var(--neutral-100);
    margin-bottom: var(--spacing-sm);
    max-width: 800px;
}

.hero-subtitle {
    font-size: 18px;
    line-height: 1.6;
    color: rgba(255, 255, 255, 0.9);
    max-width: 600px;
}

/* ========== Product Overview Section ========== */
.product-overview-section {
    padding: var(--spacing-xl) 0;
    margin-bottom: var(--spacing-xl);
    background: linear-gradient(135deg, #f9fafb 0%, #ffffff 100%);
    border-radius: var(--radius-lg);
}

.product-overview-section .container-1350 {
    max-width: 1000px;
}

.overview-content {
    font-size: 17px;
    line-height: 1.8;
    color: var(--neutral-700);
    background: var(--neutral-100);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--neutral-300);
}

.overview-content p {
    margin-bottom: var(--spacing-md);
    font-size: 17px;
    line-height: 1.8;
}

.overview-content h3,
.overview-content h4,
.overview-content h5 {
    color: var(--primary-main);
    margin-top: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
}

.overview-content h3 {
    font-size: 24px;
    border-bottom: 2px solid var(--accent-gold);
    padding-bottom: var(--spacing-xs);
}

.overview-content h4 {
    font-size: 20px;
}

.overview-content h5 {
    font-size: 18px;
}

.overview-content ul,
.overview-content ol {
    margin: var(--spacing-md) 0 var(--spacing-md) var(--spacing-lg);
}

.overview-content li {
    margin-bottom: var(--spacing-sm);
    font-size: 16px;
    line-height: 1.6;
}

.overview-content strong {
    color: var(--neutral-900);
    font-weight: 600;
}

.overview-content em {
    color: var(--neutral-600);
    font-style: italic;
}

.overview-content blockquote {
    border-left: 4px solid var(--accent-gold);
    padding: var(--spacing-md) var(--spacing-lg);
    margin: var(--spacing-lg) 0;
    background: var(--neutral-200);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    font-style: italic;
}

.overview-content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    margin: var(--spacing-md) 0;
    box-shadow: var(--shadow-md);
}

@media (max-width: 768px) {
    .overview-content {
        padding: var(--spacing-lg);
    }
    
    .overview-content p {
        font-size: 16px;
    }
}

/* ========== Main Content Container ========== */
.premium-content-container {
    max-width: 1350px;
    margin: 0 auto;
    padding: 0 var(--spacing-md) var(--spacing-xxl);
}

/* ========== Detail Sections Grid ========== */
.detail-sections-grid {
    display: grid;
    grid-template-columns: 1fr 350px;
    gap: var(--spacing-xl);
    margin: var(--spacing-xxl) 0;
}

@media (max-width: 1024px) {
    .detail-sections-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }
}

/* ========== Detail Sections Common Styles ========== */
.detail-section {
    background: var(--neutral-100);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
    border: 1px solid var(--neutral-300);
}

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

.detail-section h3,
.detail-section h4 {
    color: var(--primary-main);
    position: relative;
    padding-bottom: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

.detail-section h3::after,
.detail-section h4::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, var(--accent-gold), var(--accent-warm));
    border-radius: var(--radius-full);
}

/* det1-det7 Specific Styles */
.detail-section p {
    font-size: 16px;
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

.detail-section strong {
    color: var(--neutral-900);
    font-weight: 600;
}

.detail-section em {
    color: var(--neutral-600);
    font-style: italic;
}

/* Lists in Detail Sections */
.detail-section ul {
    list-style: none;
    margin: var(--spacing-md) 0;
}

.detail-section ul li {
    position: relative;
    padding-left: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    font-size: 16px;
    line-height: 1.6;
    color: var(--neutral-700);
}

.detail-section ul li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--accent-gold);
    font-weight: bold;
    font-size: 16px;
}

.detail-section ol {
    list-style-position: inside;
    margin: var(--spacing-md) 0;
}

.detail-section ol li {
    margin-bottom: var(--spacing-sm);
    font-size: 16px;
    line-height: 1.6;
    padding-left: var(--spacing-sm);
}

/* Tables in Detail Sections */
.detail-section table {
    width: 100%;
    border-collapse: collapse;
    margin: var(--spacing-lg) 0;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.detail-section table th {
    background: var(--primary-main);
    color: var(--neutral-100);
    font-weight: 600;
    text-align: left;
    padding: var(--spacing-md);
    font-size: 16px;
    line-height: 1.6;
}

.detail-section table td {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--neutral-300);
    font-size: 16px;
    line-height: 1.6;
}

.detail-section table tr:nth-child(even) {
    background: var(--neutral-200);
}

.detail-section table tr:hover {
    background: var(--neutral-300);
}

/* ========== Individual Section Styles ========== */
/* Specifications Section */
.specifications-section {
    background: linear-gradient(135deg, var(--neutral-100) 0%, var(--neutral-200) 100%);
}

.specifications-section table {
    background: var(--neutral-100);
}

/* Features Section */
.features-section {
    border-left: 4px solid var(--accent-gold);
}

.features-section ul li::before {
    color: var(--accent-gold);
    background: rgba(184, 154, 94, 0.1);
    width: 24px;
    height: 24px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Materials Section */
.materials-section {
    background: linear-gradient(135deg, #f8f5f0 0%, #fff 100%);
}

/* Services Section */
.services-section {
    background: var(--neutral-100);
    border: 1px solid var(--neutral-300);
}

.services-section h3 {
    color: var(--accent-gold);
}

/* FAQ Section */
.faq-section {
    background: var(--neutral-100);
}

.faq-item {
    border-bottom: 1px solid var(--neutral-300);
    padding: var(--spacing-md) 0;
}

.faq-question {
    font-size: 18px;
    line-height: 1.6;
    font-weight: 600;
    color: var(--neutral-900);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
}

.faq-question::after {
    content: '+';
    font-size: 20px;
    color: var(--accent-gold);
    transition: transform var(--transition-normal);
}

.faq-question.active::after {
    content: '−';
    transform: rotate(180deg);
}

.faq-answer {
    font-size: 16px;
    line-height: 1.6;
    color: var(--neutral-700);
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-normal), padding var(--transition-normal);
}

.faq-answer.active {
    max-height: 1000px;
    padding-top: var(--spacing-md);
}

/* ========== Products Grid ========== */
.featured-products-section {
    margin: var(--spacing-xxl) 0;
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    font-size: 36px;
    line-height: 1.2;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.product-card {
    background: var(--neutral-100);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    border: 1px solid var(--neutral-300);
}

.product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.product-image {
    position: relative;
    height: 220px;
    overflow: hidden;
}

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

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

.overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(26, 54, 93, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.product-card:hover .overlay {
    opacity: 1;
}

.view-btn {
    color: var(--neutral-100);
    border: 2px solid var(--neutral-100);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-full);
    font-weight: 600;
}

.product-info {
    padding: var(--spacing-lg);
}

.product-title {
    font-size: 20px;
    line-height: 1.4;
    margin-bottom: var(--spacing-sm);
}

.product-title a {
    color: var(--neutral-900);
}

.product-title a:hover {
    color: var(--accent-gold);
}

.cta-link {
    color: var(--accent-gold);
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
}

/* ========== Company Strength Section ========== */
.company-strength-section {
    background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
    padding: var(--spacing-xxl) 0;
    margin: var(--spacing-xxl) 0;
    position: relative;
    overflow: hidden;
}

.company-strength-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-gold), var(--accent-warm));
}

.section-intro {
    font-size: 18px;
    line-height: 1.6;
    text-align: center;
    max-width: 800px;
    margin: 0 auto var(--spacing-xl);
    color: var(--neutral-700);
}

/* ========== Company Description - 左对齐排版 ========== */
.company-description {
    max-width: 1000px;
    margin: 0 auto var(--spacing-xl);
    text-align: left;  /* 改为左对齐 */
    padding: var(--spacing-xl);
    background: var(--neutral-100);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border-left: 4px solid var(--accent-gold);
    position: relative;
}

.company-description::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, var(--accent-gold), var(--accent-warm));
    border-radius: 2px 0 0 2px;
}

.company-description p {
    font-size: 17px;
    line-height: 1.8;  /* 增加行高，更易阅读 */
    margin-bottom: var(--spacing-lg);  /* 增加段落间距 */
    color: var(--neutral-700);
    text-align: justify;  /* 两端对齐，看起来更整齐 */
    text-justify: inter-word;  /* 单词间的间距调整 */
    hyphens: auto;  /* 自动断词，美观排版 */
}

/* 首段特殊样式 */
.company-description p:first-child {
    font-size: 18px;
    line-height: 1.7;
    font-weight: 500;
    color: var(--neutral-800);
}

/* 段落缩进 */
.company-description p:not(:first-child) {
    text-indent: 2em;  /* 首行缩进2个字符 */
}

/* 添加段落之间的分隔线 */
.company-description p + p {
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--neutral-300);
    margin-top: var(--spacing-md);
}

.strength-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin: var(--spacing-xl) 0;
}

.strength-card {
    background: var(--neutral-100);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    transition: all var(--transition-normal);
    border: 1px solid var(--neutral-300);
    position: relative;
    overflow: hidden;
}

.strength-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-main), var(--accent-gold));
    transform: scaleX(0);
    transform-origin: left;
    transition: transform var(--transition-normal);
}

.strength-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

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

.strength-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-main), var(--primary-dark));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--spacing-md);
    color: var(--neutral-100);
    font-size: 32px;
    transition: all var(--transition-normal);
}

.strength-card:hover .strength-icon {
    background: linear-gradient(135deg, var(--accent-gold), var(--accent-warm));
    transform: rotateY(180deg);
}

.strength-card h4 {
    font-size: 20px;
    line-height: 1.4;
    color: var(--primary-main);
    margin-bottom: var(--spacing-md);
    font-weight: 600;
}

.strength-card ul {
    list-style: none;
    text-align: left;
    margin: 0;
}

.strength-card ul li {
    position: relative;
    padding-left: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    font-size: 14px;
    line-height: 1.8;
    color: var(--neutral-700);
}

.strength-card ul li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--accent-gold);
    font-size: 20px;
    line-height: 1;
}

/* Certifications Showcase */
.certifications-showcase {
    background: var(--neutral-100);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-top: var(--spacing-xl);
    text-align: center;
    border: 1px solid var(--neutral-300);
}

.certifications-showcase h3 {
    font-size: 24px;
    line-height: 1.2;
    color: var(--primary-main);
    margin-bottom: var(--spacing-xl);
    text-align: center;
}

.certifications-showcase h3::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: var(--accent-gold);
    margin: var(--spacing-sm) auto 0;
    border-radius: var(--radius-full);
}

.cert-logos {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: var(--spacing-xl);
    max-width: 800px;
    margin: 0 auto;
}

.cert-item {
    flex: 1;
    min-width: 150px;
    max-width: 200px;
}

.cert-logo {
    padding: var(--spacing-lg);
    background: linear-gradient(135deg, #f8f9fa, #ffffff);
    border-radius: var(--radius-lg);
    border: 2px solid var(--neutral-300);
    transition: all var(--transition-normal);
    text-align: center;
    height: 120px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

.cert-item:hover .cert-logo {
    border-color: var(--accent-gold);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    background: linear-gradient(135deg, #ffffff, #f8f9fa);
}

.cert-text {
    display: block;
    font-size: 28px;
    line-height: 1.2;
    font-weight: 700;
    color: var(--primary-main);
    margin-bottom: var(--spacing-xs);
    font-family: var(--font-primary);
}

.cert-label {
    display: block;
    font-size: 12px;
    line-height: 1.8;
    color: var(--neutral-600);
    text-transform: uppercase;
    letter-spacing: 1px;
    font-weight: 600;
}

/* ========== About GUYOU Section ========== */
.about-guyou-section {
    background: linear-gradient(135deg, var(--neutral-200) 0%, var(--neutral-100) 100%);
    padding: var(--spacing-xxl) 0;
    margin: var(--spacing-xxl) 0;
}

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

.section-label {
    display: inline-block;
    color: var(--accent-gold);
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    font-size: 14px;
    line-height: 1.8;
    margin-bottom: var(--spacing-sm);
}

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

/* ========== About Text - 左对齐排版 ========== */
.about-guyou-section .about-text {
    text-align: left;
    margin-bottom: var(--spacing-xl);
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
    padding: var(--spacing-xl);
    background: var(--neutral-100);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--neutral-300);
    font-size: 17px; /* 添加字体大小 */
    line-height: 1.7;
    color: var(--neutral-700);
}

/* 然后，我们为这个about-text中的段落和链接设置样式 */
.about-guyou-section .about-text p {
    font-size: 17px;
    line-height: 1.7;
    margin-bottom: 20px;
    color: var(--neutral-700);
    text-align: left;
}

.about-guyou-section .about-text a {
    color: var(--primary-main);
    text-decoration: underline;
    font-weight: 600;
    transition: all var(--transition-fast);
    padding: 2px 4px;
    border-radius: var(--radius-sm);
}

.about-guyou-section .about-text a:hover {
    color: var(--accent-gold);
    background-color: rgba(184, 154, 94, 0.1);
    text-decoration: none;
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(184, 154, 94, 0.2);
}

.about-text p {
    font-size: 17px;
    line-height: 1.8;
    margin-bottom: var(--spacing-lg);
    color: var(--neutral-700);
    text-align: justify;  /* 两端对齐 */
    text-justify: inter-word;
    hyphens: auto;
}

/* 首段特殊样式 - 去掉 !important */
.about-text .lead-text {
    font-size: 20px;
    font-weight: 600;
    line-height: 1.7;
    color: var(--primary-main);
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 2px solid var(--neutral-300);
    position: relative;
    text-indent: 0;  /* 首段不需要缩进 */
}

/* 首段装饰线 */
.about-text .lead-text::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 80px;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-gold), var(--accent-warm));
}

/* 其他段落首行缩进 */
.about-text p:not(.lead-text) {
    text-indent: 2em;
}

/* 添加段落之间的轻微分隔 */
.about-text p + p:not(.lead-text) {
    padding-top: var(--spacing-md);
    margin-top: var(--spacing-md);
}

/* ========== 简化版统计数字样式 ========== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

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

@media (max-width: 640px) {
    .stats-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
}

.stat-item {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-lg);
    background: var(--neutral-100);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 2px solid var(--neutral-300);
    transition: all var(--transition-normal);
}

.stat-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--accent-gold);
}

.stat-number {
    font-size: 48px;
    line-height: 1;
    font-weight: 700;
    color: var(--accent-gold);
    margin-bottom: var(--spacing-sm);
    font-family: var(--font-secondary);
}

.stat-number .unit {
    font-size: 24px;
    margin-left: 2px;
    font-weight: 500;
    color: var(--neutral-600);
}

.stat-label {
    font-size: 16px;
    line-height: 1.4;
    color: var(--neutral-800);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* ========== Contact CTA Section ========== */
.contact-cta-section {
    background: linear-gradient(135deg, var(--primary-dark) 0%, var(--primary-main) 100%);
    color: var(--neutral-100);
    padding: var(--spacing-xxl) 0;
    margin: var(--spacing-xxl) 0;
    border-radius: var(--radius-lg);
}

.cta-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.cta-title {
    color: var(--neutral-100);
    font-size: 36px;
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

.cta-text {
    color: rgba(255, 255, 255, 0.9);
    font-size: 18px;
    line-height: 1.6;
    margin-bottom: var(--spacing-xl);
}

.cta-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

.btn-primary, .btn-secondary {
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-full);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 16px;
    line-height: 1.6;
    transition: all var(--transition-normal);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    border: 2px solid transparent;
}

.btn-primary {
    background: var(--accent-gold);
    color: var(--neutral-100);
}

.btn-primary:hover {
    background: var(--accent-warm);
    transform: translateY(-2px);
    color: var(--neutral-100);
}

.btn-secondary {
    background: transparent;
    color: var(--neutral-100);
    border-color: var(--neutral-100);
}

.btn-secondary:hover {
    background: var(--neutral-100);
    color: var(--primary-main);
    transform: translateY(-2px);
}

/* ========== Related Articles ========== */
.related-articles {
    margin-top: var(--spacing-xxl);
}

.related-title {
    font-size: 28px;
    line-height: 1.2;
    margin-bottom: var(--spacing-xl);
    text-align: center;
}

.articles-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.article-card {
    background: var(--neutral-100);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    border: 1px solid var(--neutral-300);
    transition: all var(--transition-normal);
}

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

.article-heading {
    font-size: 20px;
    line-height: 1.4;
    color: var(--neutral-900);
    margin-bottom: var(--spacing-sm);
}

.read-more {
    color: var(--accent-gold);
    font-weight: 600;
    font-size: 16px;
    line-height: 1.6;
}

/* ========== Fixed Action Buttons ========== */
.fixed-actions {
    position: fixed;
    bottom: var(--spacing-xl);
    right: var(--spacing-xl);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    z-index: 1000;
}

.action-btn {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    border: none;
    background: var(--primary-main);
    color: var(--neutral-100);
    font-size: 20px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-normal);
    position: relative;
    box-shadow: var(--shadow-lg);
}

.action-btn:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-xl);
    background: var(--accent-gold);
}

.action-btn:hover .tooltip {
    opacity: 1;
    transform: translateX(-75px) translateY(-50%);
}

.tooltip {
    position: absolute;
    left: -10px;
    top: 50%;
    transform: translateX(-70px) translateY(-50%);
    background: var(--neutral-900);
    color: var(--neutral-100);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 14px;
    line-height: 1.8;
    white-space: nowrap;
    opacity: 0;
    pointer-events: none;
    transition: all var(--transition-normal);
}

.tooltip::after {
    content: '';
    position: absolute;
    right: -6px;
    top: 50%;
    transform: translateY(-50%);
    border-width: 6px 0 6px 6px;
    border-style: solid;
    border-color: transparent transparent transparent var(--neutral-900);
}

.chat-btn {
    background: var(--accent-gold);
}

.quote-btn {
    background: var(--primary-dark);
}

.back-to-top {
    background: var(--neutral-700);
}

/* ========== Responsive Design ========== */
@media (max-width: 768px) {
    h1 {
        font-size: 36px;
    }
    
    h2 {
        font-size: 28px;
    }
    
    h3 {
        font-size: 24px;
    }
    
    .hero-title {
        font-size: 36px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .detail-section {
        padding: var(--spacing-lg);
    }
    
    .strength-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .cta-buttons {
        flex-direction: column;
    }
    
    .btn-primary, .btn-secondary {
        width: 100%;
        justify-content: center;
    }
    
    .fixed-actions {
        bottom: var(--spacing-md);
        right: var(--spacing-md);
    }
    
    .action-btn {
        width: 50px;
        height: 50px;
        font-size: 18px;
    }
    
    .cert-logos {
        gap: var(--spacing-md);
    }
    
    .cert-item {
        min-width: 120px;
    }
    
    .cert-logo {
        padding: var(--spacing-md);
        height: 100px;
    }
    
    .cert-text {
        font-size: 24px;
    }
}

@media (max-width: 480px) {
    .strength-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .articles-grid {
        grid-template-columns: 1fr;
    }
    
    .cert-logos {
        flex-direction: column;
        align-items: center;
    }
    
    .cert-item {
        width: 100%;
        max-width: 200px;
    }
}

/* ========== Animation Classes ========== */
.wow {
    visibility: hidden;
}

.fadeInUp {
    animation-name: fadeInUp;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translate3d(0, 30px, 0);
    }
    to {
        opacity: 1;
        transform: translate3d(0, 0, 0);
    }
}

/* ========== Print Styles ========== */
@media print {
    .fixed-actions,
    .chat-btn,
    .back-to-top {
        display: none !important;
    }
    
    .detail-section {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ddd;
    }
}

/* ========== Related Products Section ========== */
.related-products-section {
    padding: var(--spacing-xxl) 0;
    margin: var(--spacing-xxl) 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 100%);
    position: relative;
    overflow: hidden;
}

.related-products-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-gold), var(--accent-warm));
}

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

.related-products-section .section-intro {
    font-size: 18px;
    line-height: 1.6;
    color: var(--neutral-700);
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

/* 产品网格 */
.related-products-section .products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--spacing-lg);
    margin: var(--spacing-xl) 0;
}

/* 产品卡片 */
.related-products-section .product-card {
    background: var(--neutral-100);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    border: 1px solid var(--neutral-300);
    position: relative;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.related-products-section .product-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--accent-gold);
}

/* 产品图片容器 */
.related-products-section .product-image-container {
    position: relative;
    height: 240px;
    overflow: hidden;
    background: var(--neutral-200);
}

.related-products-section .product-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.related-products-section .product-card:hover .product-image {
    transform: scale(1.1);
}

/* 图片遮罩层 */
.related-products-section .image-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(to top, rgba(26, 54, 93, 0.9), rgba(26, 54, 93, 0.4));
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity var(--transition-normal);
}

.related-products-section .product-card:hover .image-overlay {
    opacity: 1;
}

.related-products-section .view-details {
    color: var(--neutral-100);
    border: 2px solid var(--neutral-100);
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-full);
    font-weight: 600;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
}

/* 产品徽章 */
.related-products-section .product-badge {
    position: absolute;
    top: 16px;
    right: 16px;
    z-index: 2;
}

.related-products-section .badge-text {
    background: var(--accent-gold);
    color: var(--neutral-100);
    padding: 6px 12px;
    border-radius: var(--radius-full);
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    box-shadow: var(--shadow-sm);
}

/* 产品信息 */
.related-products-section .product-info {
    padding: var(--spacing-lg);
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.related-products-section .product-name {
    font-size: 18px;
    line-height: 1.4;
    margin-bottom: var(--spacing-md);
    flex-grow: 1;
}

.related-products-section .product-name a {
    color: var(--neutral-900);
    transition: color var(--transition-fast);
}

.related-products-section .product-name a:hover {
    color: var(--accent-gold);
}

/* 产品操作按钮 */
.related-products-section .product-actions {
    margin-top: auto;
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--neutral-300);
}

.related-products-section .view-button {
    color: var(--accent-gold);
    font-weight: 600;
    font-size: 15px;
    line-height: 1.6;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    transition: all var(--transition-fast);
}

.related-products-section .view-button:hover {
    color: var(--accent-warm);
    gap: 12px;
}

/* 查看全部按钮区域 */
.related-products-section .view-all-container {
    text-align: center;
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--neutral-300);
}

.related-products-section .view-all-button {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    background: var(--primary-main);
    color: var(--neutral-100);
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 16px;
    line-height: 1.6;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all var(--transition-normal);
    border: 2px solid var(--primary-main);
    box-shadow: var(--shadow-md);
}

.related-products-section .view-all-button:hover {
    background: var(--accent-gold);
    color: var(--neutral-100);
    border-color: var(--accent-gold);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    gap: var(--spacing-md);
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .related-products-section .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .related-products-section .products-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .related-products-section .product-image-container {
        height: 220px;
    }
    
    .related-products-section .product-info {
        padding: var(--spacing-md);
    }
    
    .related-products-section .view-all-button {
        padding: var(--spacing-sm) var(--spacing-lg);
        font-size: 15px;
    }
}

/* 针对det1-det6中的标题样式 */
.detail-section h3,
.detail-section h4 {
    font-size: 24px; /* 或者你希望的大小 */
    line-height: 1.2;
    margin-bottom: var(--spacing-md);
}

.detail-section h4 {
    font-size: 20px;
}

@media (max-width: 768px) {
    /* 公司描述和关于我们部分的响应式调整 */
    .company-description,
    .about-text {
        padding: var(--spacing-lg);
        margin-left: var(--spacing-md);
        margin-right: var(--spacing-md);
    }
    
    .company-description p,
    .about-text p {
        font-size: 16px;
        line-height: 1.7;
        text-align: left;  /* 手机上也保持左对齐 */
        text-justify: auto;  /* 手机上去掉两端对齐 */
    }
    
    .company-description p:not(:first-child),
    .about-text p:not(.lead-text) {
        text-indent: 1.5em;  /* 手机端缩进稍微减少 */
    }
}