/* ============================================
   Baorui Technology - Corporate Website Styles
   Theme: Industrial Blue + Orange
   Responsive Design
   ============================================ */

/* --- CSS Variables --- */
:root {
    --primary-blue: #1a3a5c;
    --secondary-blue: #2c5f8a;
    --accent-orange: #e67e22;
    --accent-orange-hover: #d35400;
    --light-gray: #f5f7fa;
    --medium-gray: #e0e6ed;
    --dark-gray: #2c3e50;
    --text-color: #333333;
    --text-light: #666666;
    --white: #ffffff;
    --shadow: 0 2px 10px rgba(0,0,0,0.1);
    --shadow-hover: 0 5px 20px rgba(0,0,0,0.15);
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "Noto Sans CJK SC", "Noto Sans CJK JP", "Noto Sans CJK KR", "Noto Sans Cyrillic", "Microsoft YaHei", "PingFang SC", "Helvetica Neue", sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--white);
}

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

ul {
    list-style: none;
}

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

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

/* --- Header & Navigation --- */
.header {
    background: var(--white);
    box-shadow: var(--shadow);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
}

.header-top {
    background: var(--primary-blue);
    color: var(--white);
    padding: 8px 0;
    font-size: 13px;
}

.header-top .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-contact {
    display: flex;
    gap: 20px;
}

.header-contact a:hover {
    color: var(--accent-orange);
}

.lang-switcher {
    display: flex;
    gap: 10px;
}

.lang-switcher a {
    color: var(--white);
    opacity: 0.8;
}

.lang-switcher a.active,
.lang-switcher a:hover {
    opacity: 1;
    color: var(--accent-orange);
}

.header-main {
    padding: 15px 0;
}

.header-main .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo img {
    height: 50px;
}

.logo-text h1 {
    font-size: 24px;
    color: var(--primary-blue);
    font-weight: 700;
}

.logo-text p {
    font-size: 12px;
    color: var(--text-light);
    letter-spacing: 1px;
}

.nav-menu {
    display: flex;
    gap: 30px;
}

.nav-menu a {
    font-size: 15px;
    font-weight: 500;
    color: var(--text-color);
    padding: 10px 0;
    position: relative;
}

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

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

.nav-menu a:hover,
.nav-menu a.active {
    color: var(--accent-orange);
}

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--primary-blue);
    transition: var(--transition);
}

/* --- Hero Section --- */
.hero {
    margin-top: 120px;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    color: var(--white);
    padding: 100px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="40" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="0.5"/></svg>') repeat;
    opacity: 0.3;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero h2 {
    font-size: 48px;
    margin-bottom: 20px;
    font-weight: 700;
}

.hero p {
    font-size: 20px;
    margin-bottom: 30px;
    opacity: 0.9;
}

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

}

.btn {
    display: inline-block;
    padding: 14px 32px;
    border-radius: 4px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
}

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

.btn-primary:hover {
    background: var(--accent-orange-hover);
    transform: translateY(-2px);
}

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

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

/* --- Section Styles --- */
.section {
    padding: 80px 0;
}

.section-gray {
    background: var(--light-gray);
}

.section-title {
    text-align: center;
    margin-bottom: 50px;
}

.section-title h2 {
    font-size: 36px;
    color: var(--primary-blue);
    margin-bottom: 15px;
}

.section-title p {
    font-size: 18px;
    color: var(--text-light);
}

.section-title .accent-line {
    width: 60px;
    height: 4px;
    background: var(--accent-orange);
    margin: 15px auto 0;
}

/* --- Products Grid --- */
.products-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.product-card {
    background: var(--white);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

.product-card-image {
    height: 200px;
    background: var(--medium-gray);
    display: flex;
    align-items: center;
    justify-content: center;

    color: var(--text-light);
    font-size: 14px;
}

.product-card-content {
    padding: 20px;
}

.product-card-content h3 {
    font-size: 18px;
    color: var(--primary-blue);
    margin-bottom: 10px;
}

.product-card-content p {
    font-size: 14px;
    color: var(--text-light);
    margin-bottom: 15px;
}

.product-card-content .btn-small {
    display: inline-block;
    padding: 8px 20px;
    background: var(--accent-orange);
    color: var(--white);
    border-radius: 4px;
    font-size: 14px;
}

.product-card-content .btn-small:hover {
    background: var(--accent-orange-hover);
}

/* --- Features Section --- */
.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.feature-item {
    text-align: center;
    padding: 30px 20px;
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: var(--accent-orange);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;

    margin: 0 auto 20px;
    color: var(--white);
    font-size: 32px;
}

.feature-item h3 {
    font-size: 20px;
    color: var(--primary-blue);
    margin-bottom: 10px;
}

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

/* --- About Section --- */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: center;
}

.about-image {
    height: 400px;
    background: var(--medium-gray);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;

    color: var(--text-light);
}

.about-text h3 {
    font-size: 28px;
    color: var(--primary-blue);
    margin-bottom: 20px;
}

.about-text p {
    font-size: 15px;
    color: var(--text-light);
    margin-bottom: 15px;
    line-height: 1.8;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-top: 30px;
}

.stat-item {
    text-align: center;
    padding: 20px;
    background: var(--light-gray);
    border-radius: 8px;
}

.stat-item .number {
    font-size: 36px;
    font-weight: 700;
    color: var(--accent-orange);
}

.stat-item .label {
    font-size: 14px;
    color: var(--text-light);
    margin-top: 5px;
}

/* --- News Section --- */
.news-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.news-card {
    background: var(--white);
    border-radius: 8px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

.news-card-image {
    height: 180px;
    background: var(--medium-gray);
    display: flex;
    align-items: center;
    justify-content: center;

    color: var(--text-light);
}

.news-card-content {
    padding: 20px;
}

.news-card-date {
    font-size: 13px;
    color: var(--accent-orange);
    margin-bottom: 10px;
}

.news-card-content h3 {
    font-size: 18px;
    color: var(--primary-blue);
    margin-bottom: 10px;
}

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

/* --- Contact Section --- */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}

.contact-info h3 {
    font-size: 24px;
    color: var(--primary-blue);
    margin-bottom: 20px;
}

.contact-item {
    display: flex;
    gap: 15px;
    margin-bottom: 20px;
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: var(--accent-orange);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;

    color: var(--white);
    font-size: 20px;
    flex-shrink: 0;
}

.contact-detail h4 {
    font-size: 16px;
    color: var(--primary-blue);
    margin-bottom: 5px;
}

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

.contact-form {
    background: var(--white);
    padding: 30px;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

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

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

.form-group input,
.form-group textarea,
.form-group select {
    max-width: 100%;
    padding: 12px;
    border: 1px solid var(--medium-gray);
    border-radius: 4px;
    font-size: 14px;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--accent-orange);
}

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


/* --- Breadcrumb Section --- */
.breadcrumb-section {
    background: var(--light-gray);
    padding: 20px 0;
}

.breadcrumb {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: var(--text-light);
}

.breadcrumb a {
    color: var(--secondary-blue);
}

.breadcrumb a:hover {
    color: var(--accent-orange);
}

.breadcrumb .separator {
    color: var(--medium-gray);
}

.breadcrumb .current {
    color: var(--text-color);
    font-weight: 500;
}

/* --- Feature Card (for about page) --- */
.feature-card {
    text-align: center;
    padding: 30px 20px;
    background: var(--white);
    border-radius: 8px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

.feature-card .feature-icon {
    width: 80px;
    height: 80px;
    background: var(--accent-orange);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;

    margin: 0 auto 20px;
    color: var(--white);
    font-size: 32px;
}

.feature-card h3 {
    font-size: 20px;
    color: var(--primary-blue);
    margin-bottom: 10px;
}

.feature-card p {
    font-size: 14px;
    color: var(--text-light);
}
/* --- Footer --- */
.footer {
    background: var(--primary-blue);
    color: var(--white);
    padding: 60px 0 20px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h3 {
    font-size: 18px;
    margin-bottom: 20px;
    color: var(--accent-orange);
}

.footer-col p,
.footer-col a {
    font-size: 14px;
    color: rgba(255,255,255,0.8);
    line-height: 1.8;
}

.footer-col a:hover {
    color: var(--accent-orange);
}

.footer-col ul li {
    margin-bottom: 10px;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 20px;
    text-align: center;
    font-size: 13px;
    color: rgba(255,255,255,0.6);
}

/* --- Responsive Design --- */
@media (max-width: 1024px) {
    .products-grid,
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .footer-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .header-top {
        display: none;
    }
    
    .hero {
        margin-top: 80px;
        padding: 60px 0;
    }
    
    .hero h2 {
        font-size: 32px;
    }
    
    .hero p {
        font-size: 16px;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 20px;
        box-shadow: var(--shadow);
    }
    
    .nav-menu.active {
        display: flex;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .products-grid,
    .features-grid,
    .news-grid {
        grid-template-columns: 1fr;
    }
    
    .about-content,
    .contact-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .section {
        padding: 50px 0;
    }
    
    .section-title h2 {
        font-size: 28px;
    }
}

@media (max-width: 480px) {
    .hero h2 {
        font-size: 24px;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
    }
}

/* --- Article Content Styles --- */
.article-content {
    background: var(--white);
    padding: 40px;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.article-content h3 {
    font-size: 22px;
    color: var(--primary-blue);
    margin-top: 30px;
    margin-bottom: 15px;
    padding-left: 15px;
    border-left: 4px solid var(--accent-orange);
}

.article-content h4 {
    font-size: 18px;
    color: var(--primary-blue);
    margin-top: 20px;
    margin-bottom: 10px;
}

.article-content p {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-color);
    margin-bottom: 15px;
}

.article-content strong {
    color: var(--primary-blue);
}

/* --- News Card Styles --- */
.news-card {
    display: flex;
    gap: 20px;
    padding: 20px;
    background: var(--white);
    border-radius: 8px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    margin-bottom: 20px;
}

.news-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-2px);
}

.news-card-image {
    flex-shrink: 0;
    width: 80px;
    height: 80px;
    background: var(--primary-blue);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;

    font-size: 24px;
    color: var(--white);
}

.news-card-content {
    flex: 1;
}

.news-card-date {
    font-size: 13px;
    color: var(--text-light);
    margin-bottom: 5px;
}

.news-card h3 {
    font-size: 18px;
    color: var(--primary-blue);
    margin-bottom: 8px;
}

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

/* --- Hero Content Styles --- */
.hero-content h2 {
    font-size: 36px;
    color: var(--primary-blue);
    margin-bottom: 10px;
}

/* --- Button Styles --- */
.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 4px;
    font-size: 16px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    text-align: center;
}

.btn-primary {
    background: var(--accent-orange);
    color: var(--white);
    border: 2px solid var(--accent-orange);
}

.btn-primary:hover {
    background: var(--accent-orange-hover);
    border-color: var(--accent-orange-hover);
}

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

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

/* --- Mobile Menu Toggle --- */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 5px;
}

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--primary-blue);
    border-radius: 2px;
    transition: var(--transition);
}

/* --- Responsive Design Enhancements --- */
@media (max-width: 768px) {
    .article-content {
        padding: 20px;
    }

    .article-content h3 {
        font-size: 18px;
    }

    .article-content p {
        font-size: 15px;
    }

    .news-card {
        flex-direction: column;
    }

    .news-card-image {
        max-width: 100%;
        height: 60px;
    }

    .hero-content h2 {
        font-size: 28px;
    }

    .btn {
        display: block;
        max-width: 100%;
        margin-bottom: 10px;
    }

    .btn-outline {
        margin-left: 0;
    }
}

@media (max-width: 480px) {
    .article-content {
        padding: 15px;
    }

    .article-content h3 {
        font-size: 16px;
    }

    .article-content p {
        font-size: 14px;
    }

    .hero-content h2 {
        font-size: 22px;
    }
}

/* ============================================
   Product Card Image Support (T23)
   ============================================ */
.product-card-image-bg {
    height: 200px;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    position: relative;
}

.product-card-image-bg::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(180deg, rgba(26,58,92,0.3) 0%, rgba(26,58,92,0.6) 100%);
}

.product-card-image-bg .product-card-label {
    position: absolute;
    bottom: 15px;
    left: 15px;
    color: var(--white);
    font-size: 16px;
    font-weight: 700;
    z-index: 1;
    text-shadow: 0 1px 3px rgba(0,0,0,0.5);
}

/* Hero section with background image */
.hero-image {
    margin-top: 120px;
    color: var(--white);
    padding: 100px 0;
    text-align: center;
    position: relative;
    background-size: cover;
    background-position: center;
}

.hero-image::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(26,58,92,0.85) 0%, rgba(44,95,138,0.75) 100%);
    z-index: 0;
}

.hero-image .hero-content {
    position: relative;
    z-index: 1;
}

/* News card image */
.news-card-image-bg {
    height: 180px;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    position: relative;
}

.news-card-image-bg::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(180deg, rgba(26,58,92,0.2) 0%, rgba(26,58,92,0.5) 100%);
}

.news-card-image-bg .news-card-label {
    position: absolute;
    bottom: 10px;
    left: 10px;
    color: var(--white);
    font-size: 13px;
    font-weight: 600;
    z-index: 1;
    text-shadow: 0 1px 2px rgba(0,0,0,0.5);
}

/* ============================================
   Contact Page Styles
   ============================================ */
.page-header {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    color: var(--white);
    padding: 100px 0 60px;
    text-align: center;
    margin-top: 120px;
}

.page-header h1 {
    font-size: 42px;
    margin-bottom: 15px;
    font-weight: 700;
}

.page-header p {
    font-size: 18px;
    opacity: 0.9;
}

.contact-section {
    padding: 80px 0;
    background: var(--light-gray);
}

.contact-section .contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
}

.contact-section .contact-info h3 {
    font-size: 24px;
    color: var(--primary-blue);
    margin-bottom: 30px;
}

.contact-section .contact-item {
    display: flex;
    gap: 15px;
    margin-bottom: 25px;
    align-items: flex-start;
}

.contact-section .contact-icon {
    width: 50px;
    height: 50px;
    background: var(--accent-orange);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;

    color: var(--white);
    font-size: 20px;
    flex-shrink: 0;
}

.contact-section .contact-detail h4 {
    font-size: 16px;
    color: var(--primary-blue);
    margin-bottom: 5px;
    font-weight: 600;
}

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

.contact-section .contact-form {
    background: var(--white);
    padding: 40px;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

.contact-section .contact-form h3 {
    font-size: 24px;
    color: var(--primary-blue);
    margin-bottom: 25px;
}

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

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

.contact-section .form-group input,
.contact-section .form-group textarea,
.contact-section .form-group select {
    max-width: 100%;
    padding: 12px;
    border: 1px solid var(--medium-gray);
    border-radius: 4px;
    font-size: 14px;
    transition: var(--transition);
}

.contact-section .form-group input:focus,
.contact-section .form-group textarea:focus,
.contact-section .form-group select:focus {
    outline: none;
    border-color: var(--accent-orange);
}

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

.contact-section .btn-primary {
    max-width: 100%;
    padding: 14px 32px;
    font-size: 16px;
}

/* Responsive */
@media (max-width: 768px) {
    .page-header {
        padding: 80px 0 40px;
        margin-top: 100px;
    }

    .page-header h1 {
        font-size: 32px;
    }

    .page-header p {
        font-size: 16px;
    }

    .contact-section {
        padding: 40px 0;
    }

    .contact-section .contact-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }

    .contact-section .contact-form {
        padding: 25px;
    }
}

@media (max-width: 480px) {
    .page-header {
        padding: 60px 0 30px;
        margin-top: 90px;
    }

    .page-header h1 {
        font-size: 26px;
    }

    .page-header p {
        font-size: 14px;
    }

    .contact-section .contact-form {
        padding: 20px;
    }
}

/* ============================================
   Map Section Styles
   ============================================ */
.map-section {
    padding: 60px 0;
    background: var(--white);
}

.map-section h3 {
    font-size: 24px;
    color: var(--primary-blue);
    margin-bottom: 20px;
    text-align: center;
}

.map-section iframe {
    border-radius: 8px;
    box-shadow: var(--shadow);
}

@media (max-width: 768px) {
    .map-section {
        padding: 40px 0;
    }

    .map-section h3 {
        font-size: 20px;
    }

    .map-section iframe {
        height: 250px;
    }
}

/* ============================================
   Product Page Styles (石灰喷吹系统)
   ============================================ */

/* --- Hero Product Section --- */
.hero-product {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    color: var(--white);
    padding: 140px 0 80px;
    text-align: center;
    margin-top: 120px;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    position: relative;
}

.hero-product::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(26,58,92,0.88) 0%, rgba(44,95,138,0.78) 100%);
    z-index: 0;
}

.hero-product .container {
    position: relative;
    z-index: 1;
}

.hero-product h1,
    .hero-product h2 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 15px;
    letter-spacing: 2px;
}

.hero-product p {
    font-size: 20px;
    opacity: 0.95;
    margin-bottom: 8px;
}

.hero-product .hero-sub {
    font-size: 20px;
    opacity: 0.95;
    margin-bottom: 8px;
}

.hero-product .hero-sub-en {
    font-size: 16px;
    opacity: 0.75;
    margin-bottom: 30px;
    font-weight: 400;
}

.hero-product .hero-cta {
    display: flex;
    gap: 15px;
    justify-content: center;

    flex-wrap: wrap;
}

.hero-product .btn-primary {
    background: var(--accent-orange);
    border-color: var(--accent-orange);
}

.hero-product .btn-primary:hover {
    background: var(--accent-orange-hover);
    border-color: var(--accent-orange-hover);
}

.hero-product .btn-outline {
    background: transparent;
    border-color: var(--white);
    color: var(--white);
}

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

/* --- Section Base --- */
.section {
    padding: 80px 0;
}

.section:nth-child(even) {
    background: var(--light-gray);
}

.section h2 {
    font-size: 32px;
    color: var(--primary-blue);
    text-align: center;
    margin-bottom: 50px;
    position: relative;
}

.section h2::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background: var(--accent-orange);
    margin: 15px auto 0;
}

/* --- Product Overview --- */
.product-overview {
    padding: 80px 0;
}

.overview-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.overview-text p {
    font-size: 16px;
    line-height: 1.9;
    color: var(--text-color);
    margin-bottom: 20px;
}

.overview-image {
    text-align: center;
}

.overview-image img {
    max-height: 350px;
    border-radius: 12px;
    box-shadow: var(--shadow-hover);
    max-width: 100%;
    height: auto;
}

/* --- Application Scenarios --- */
.scenario-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 25px;
}

.scenario-card {
    background: var(--white);
    border-radius: 12px;
    padding: 35px 25px;
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border-top: 3px solid transparent;
}

.scenario-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-hover);
    border-top-color: var(--accent-orange);
}

.scenario-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.scenario-card h3 {
    font-size: 18px;
    color: var(--primary-blue);
    margin-bottom: 15px;
}

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

/* --- System Components --- */
.system-components {
    padding: 80px 0;
}

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

.component-item {
    background: var(--white);
    border-radius: 12px;
    padding: 30px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border-left: 4px solid var(--secondary-blue);
}

.component-item:hover {
    box-shadow: var(--shadow-hover);
    border-left-color: var(--accent-orange);
}

.component-item h3 {
    font-size: 18px;
    color: var(--primary-blue);
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--medium-gray);
}

.component-item ul li {
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.8;
    padding: 4px 0;
    padding-left: 15px;
    position: relative;
}

.component-item ul li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--accent-orange);
}

.component-item img {
    border-radius: 8px;
    box-shadow: var(--shadow);
    margin-top: 15px;
}

/* --- Technical Specifications --- */
.tech-specs {
    padding: 80px 0;
}

.specs-table-wrapper {
    overflow-x: auto;
}

.specs-table {
    max-width: 100%;

    border-collapse: collapse;
    background: var(--white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

.specs-table thead {
    background: var(--primary-blue);
    color: var(--white);
}

.specs-table th {
    padding: 16px 20px;
    font-size: 15px;
    font-weight: 600;
    text-align: left;
}

.specs-table td {
    padding: 14px 20px;
    font-size: 14px;
    color: var(--text-color);
    border-bottom: 1px solid var(--medium-gray);
}

.specs-table tbody tr:hover {
    background: var(--light-gray);
}

.specs-table tbody tr:last-child td {
    border-bottom: none;
}

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

.advantage-item {
    text-align: center;
    padding: 35px 25px;
    background: var(--white);
    border-radius: 12px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

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

.adv-icon {
    font-size: 42px;
    margin-bottom: 18px;
}

.advantage-item h3 {
    font-size: 18px;
    color: var(--primary-blue);
    margin-bottom: 12px;
}

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

/* --- Case Studies --- */
.case-studies {
    padding: 80px 0;
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 25px;
}

.case-card {
    background: var(--white);
    border-radius: 12px;
    padding: 30px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border-left: 4px solid var(--accent-orange);
}

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

.case-card h3 {
    font-size: 17px;
    color: var(--primary-blue);
    margin-bottom: 12px;
    line-height: 1.5;
}

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

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

.cta-section h2 {
    color: var(--white);
    margin-bottom: 15px;
}

.cta-section h2::after {
    background: var(--accent-orange);
}

.cta-section p {
    font-size: 17px;
    opacity: 0.9;
    margin-bottom: 30px;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.cta-section .btn-primary {
    background: var(--accent-orange);
    border-color: var(--accent-orange);
    font-size: 18px;
    padding: 15px 40px;
}

.cta-section .btn-primary:hover {
    background: var(--accent-orange-hover);
    border-color: var(--accent-orange-hover);
}

/* --- Responsive Design for Product Pages --- */
@media (max-width: 1024px) {
    .scenario-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .component-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .hero-product {
        padding: 130px 0 60px;
    }
    
        .hero-product h1,
    .hero-product h2 {
        font-size: 32px;
    }
    
    .hero-product .hero-sub {
        font-size: 16px;
    }
    
    .section {
        padding: 50px 0;
    }
    
    .section h2 {
        font-size: 26px;
        margin-bottom: 35px;
    }
    
    .overview-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .scenario-grid {
        grid-template-columns: 1fr;
    }
    
    .component-grid {
        grid-template-columns: 1fr;
    }
    
    .advantages-grid {
        grid-template-columns: 1fr;
    }
    
    .cases-grid {
        grid-template-columns: 1fr;
    }
    
    .hero-product .hero-cta {
        flex-direction: column;
        align-items: center;
    }
    
    .specs-table th,
    .specs-table td {
        padding: 10px 12px;
        font-size: 13px;
    }
}

@media (max-width: 480px) {
    .hero-product h1,
    .hero-product h2 {
        font-size: 26px;
    }
    
    .section h2 {
        font-size: 22px;
    }
    
    .scenario-card,
    .component-item,
    .case-card {
        padding: 20px;
    }
}

/* --- Smooth scroll offset for fixed header --- */
html {
    scroll-behavior: smooth;
}

section[id],
div[id] {
    scroll-margin-top: 130px;
}

/* ============================================
   Multi-Language Text Expansion Fix (T65)
   Chinese→English 3.5x, Chinese→Russian 3.94x
   ============================================ */

/* 1. All text containers: allow words to wrap properly */
.product-card-content p,
.feature-item p,
.feature-card p,
.news-card-content p,
.news-card p,
.about-text p,
.contact-detail p,
.advantage-item p,
.case-card p,
.article-content p,
.footer-col p,
.hero p,
.hero-product .hero-sub,
.hero-product .hero-sub-en,
.section-title p,
.cta-section p {
    overflow-wrap: break-word;
    word-break: break-word;
    hyphens: auto;
}

/* 2. Product cards: allow content to expand naturally */
.product-card {
    overflow: visible;
}

.product-card-content {
    min-height: auto;
    overflow: visible;
}

/* 3. News cards: allow content to expand naturally */
.news-card {
    overflow: visible;
}

.news-card-content {
    overflow: visible;
}

/* 4. Feature items: prevent text clipping */
.feature-item {
    overflow: visible;
}

.feature-card {
    overflow: visible;
}

/* 5. Advantage & case cards */
.advantage-item {
    overflow: visible;
}

.case-card {
    overflow: visible;
}

/* 6. Specs table: let columns adapt to long text */
.specs-table,
.specs-table thead,
.specs-table tbody,
.specs-table th,
.specs-table td {
    word-break: break-word;
    overflow-wrap: break-word;
}

/* 7. Inline spec boxes (product pages) */
.specs-table-wrapper {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

/* 8. Component items (sub-pages) */
.component-item p,
.component-item ul li {
    overflow-wrap: break-word;
    word-break: break-word;
}

/* 9. Hero text: prevent overflow on small screens */
.hero h2,
.hero-content h2,
.hero-product h1,
    .hero-product h2 {
    overflow-wrap: break-word;
    word-break: break-word;
}

/* 10. Section titles */
.section-title h2,
.section h2 {
    overflow-wrap: break-word;
    word-break: break-word;
}

/* 11. Footer links */
.footer-col a {
    overflow-wrap: break-word;
    word-break: break-word;
}

/* 12. Breadcrumb */
.breadcrumb {
    overflow-wrap: break-word;
}

/* 13. Form labels and placeholders */
.form-group label,
.form-group input,
.form-group textarea,
.form-group select {
    overflow-wrap: break-word;
}

/* 14. Stat items */
.stat-item .label {
    overflow-wrap: break-word;
    word-break: break-word;
}

/* 15. Logo text */
.logo-text h1,
.logo-text p {
    overflow-wrap: break-word;
}

/* 16. Navigation menu */
.nav-menu a {
    overflow-wrap: break-word;
}

/* 17. Page header */
.page-header h1,
.page-header p {
    overflow-wrap: break-word;
    word-break: break-word;
}

/* 18. Contact section */
.contact-section .contact-detail p {
    overflow-wrap: break-word;
}

/* 19. Article content */
.article-content h3,
.article-content h4 {
    overflow-wrap: break-word;
    word-break: break-word;
}

/* 20. CTA section */
.cta-section h2 {
    overflow-wrap: break-word;
    word-break: break-word;
}

/* 21. Overview text */
.overview-text p {
    overflow-wrap: break-word;
    word-break: break-word;
}

/* 22. Scenario cards */
.scenario-card h3,
.scenario-card p {
    overflow-wrap: break-word;
    word-break: break-word;
}

/* 23. Hero product CTA buttons container */
.hero-product .hero-cta {
    flex-wrap: wrap;
}

/* 24. Ensure grid items don't shrink below readable text */
.products-grid .product-card,
.features-grid .feature-item,
.news-grid .news-card,
.advantages-grid .advantage-item {
    min-width: 0;
}

/* 25. Table cells in sub-pages (inline styles may override) */
table td,
table th {
    word-break: break-word;
    overflow-wrap: break-word;
}

/* ============================================
   Sub-page Specific Styles (consolidated from inline styles)
   ============================================ */

/* Product grid for sub-pages */
.product-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 28px;
    max-width: 1100px;

}

.product-image {
    text-align: center;
    margin-bottom: 15px;
}

.product-image img {
    max-height: 500px;
    border-radius: 8px;
    box-shadow: var(--shadow);
}

/* Highlights section */
.highlights {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
}

.highlight-item {
    text-align: center;
    padding: 24px 18px;
    background: var(--white);
    border-radius: 8px;
    border: 1px solid var(--medium-gray);
    transition: var(--transition);
}

.highlight-item:hover {
    box-shadow: 0 4px 20px rgba(0,0,0,0.1);
    transform: translateY(-2px);
}

.highlight-item .icon {
    font-size: 36px;
    margin-bottom: 10px;
}

.highlight-item h4 {
    color: var(--primary-blue);
    margin-bottom: 8px;
}

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

/* Advantages grid */
.adv-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
}

.adv-item {
    text-align: center;
    padding: 20px 15px;
    background: var(--white);
    border-radius: 8px;
    border: 1px solid var(--medium-gray);
}

.adv-item h4 {
    color: var(--primary-blue);
    margin-bottom: 8px;
}

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

/* FAQ items */
.faq-item {
    margin-bottom: 16px;
    padding: 20px 24px;
    background: var(--white);
    border-radius: 8px;
    border: 1px solid var(--medium-gray);
}

.faq-item h4 {
    color: var(--primary-blue);
    margin-bottom: 8px;
}

.faq-item p {
    color: var(--text-color);
}

/* CTA banner */
.cta-banner {
    text-align: center;
    padding: 50px 40px;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    border-radius: 12px;
    color: var(--white);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.15);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.cta-banner:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.2);
}

.cta-banner h2,
.cta-banner h3 {
    color: var(--white);
    margin-bottom: 16px;
    font-size: 1.5rem;
}

.cta-banner p {
    max-width: 600px;
    margin: 0 auto 28px;
    opacity: 0.92;
    font-size: 1rem;
    line-height: 1.7;
}

.cta-banner .btn-primary {
    background: var(--accent-orange);
    padding: 16px 48px;
    font-size: 17px;
    border-radius: 6px;
    box-shadow: 0 4px 16px rgba(255, 140, 0, 0.3);
    transition: all 0.3s ease;
}

.cta-banner .btn-primary:hover {
    background: var(--accent-orange-hover);
    transform: translateY(-3px);
    box-shadow: 0 6px 24px rgba(255, 140, 0, 0.4);
}

/* Responsive adjustments for sub-page grids */
@media (max-width: 768px) {
    .product-grid {
        grid-template-columns: 1fr;
    }
    
    .highlights {
        grid-template-columns: 1fr;
    }
    
    .adv-grid {
        grid-template-columns: 1fr;
    }
}

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

/* ============================================
   Sub-page Wall-specific utility classes
   (for sub-eaf-wall.html inline style migration)
   ============================================ */

/* Hero override for sub-pages with custom padding */
.hero-sub-page {
    margin-top: 80px;
    padding: 60px 0;
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--secondary-blue) 100%);
    color: var(--white);
    text-align: center;
}

.hero-sub-page .container-narrow {
    margin: 0 auto;
    padding-top: 20px;
}

.hero-sub-page .hero-text-muted {
    text-align: center;
    margin-bottom: 15px;
    opacity: 0.8;
}

.hero-sub-page .hero-text-muted a {
    color: var(--accent-orange);
    text-decoration: none;
    font-weight: 500;
}

.hero-sub-page .hero-text-muted a:hover {
    text-decoration: underline;
}

.hero-sub-page .hero-text-lg {
    font-size: 2.2em;
    margin-bottom: 15px;
}

.hero-sub-page .hero-text-sub {
    font-size: 1.3em;
    opacity: 0.9;
    margin-bottom: 25px;
}

.hero-sub-page .hero-text-desc {
    max-width: 700px;
    margin: 0 auto 30px;
    line-height: 1.8;
    font-size: 1.05em;
}

/* === Missing utility classes for sub-eaf-wall.html === */

/* Section heading */
.section-heading {
    text-align: center;
    color: var(--primary-blue);
    margin-bottom: 30px;
    font-size: 1.8rem;
}


/* Hero CTA card */
.hero-cta-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 12px;
    padding: 24px 32px;
    margin-top: 10px;
    display: inline-flex;
    gap: 16px;
    flex-wrap: wrap;
    justify-content: center;

}

.hero-cta-card .btn-hero-primary {
    display: inline-block;
    padding: 14px 36px;
    background: var(--accent-orange);
    color: var(--white);
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(255, 140, 0, 0.3);
}

.hero-cta-card .btn-hero-primary:hover {
    background: var(--accent-orange-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 140, 0, 0.4);
}

.hero-cta-card .btn-hero-outline {
    display: inline-block;
    padding: 14px 36px;
    background: transparent;
    color: var(--white);
    border: 2px solid rgba(255, 255, 255, 0.6);
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
}

.hero-cta-card .btn-hero-outline:hover {
    background: var(--white);
    color: var(--primary-blue);
    border-color: var(--white);
}

/* CTA row */
.cta-row {
    display: flex;
    gap: 15px;
    margin-top: 20px;
    flex-wrap: wrap;
}

/* Orange link */
.link-orange {
    color: var(--accent-orange);
    text-decoration: none;
    font-weight: 500;
}

.link-orange:hover {
    text-decoration: underline;
}


/* Narrow container */
.container-narrow {
    margin: 0 auto;
    max-width: 960px;

    padding: 0 20px;
}

/* Orange accent button override */
.btn-orange {
    background: var(--accent-orange) !important;
    border-color: var(--accent-orange) !important;
}

/* Light gray section background */
.section-light {
    background: var(--light-gray);
}

/* KPI stat grid */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

/* KPI stat card */
.kpi-card {
    background: var(--white);
    border-radius: 8px;
    padding: 24px;
    text-align: center;
    box-shadow: 0 2px 12px rgba(0,0,0,0.06);
}

.kpi-number {
    font-size: 2em;
    color: var(--accent-orange);
    font-weight: bold;
}

.kpi-label {
    color: var(--text-light);
    margin: 8px 0 0;
}

/* Product series card */
.series-card {
    background: var(--white);
    border-radius: 8px;
    padding: 30px;
    margin-bottom: 24px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.06);
}

/* ============================================

/* ============================================
   Product Series Grid (EAF Wall)
   ============================================ */

.product-series-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.product-series-grid .product-card {
    background: var(--white);
    border-radius: 12px;
    padding: 28px 28px 24px;
    box-shadow: 0 2px 16px rgba(0, 0, 0, 0.06);
    border-left: 4px solid var(--accent-orange);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.product-series-grid .product-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 24px rgba(0, 0, 0, 0.1);
}

.product-card-header {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 14px;
}

.product-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;

    min-width: 40px;
    height: 40px;
    padding: 0 8px;
    background: linear-gradient(135deg, var(--accent-orange), #e8760a);
    color: var(--white);
    font-size: 16px;
    font-weight: 700;
    border-radius: 50%;
    flex-shrink: 0;
}

.product-card-title {
    color: var(--primary-blue);
    font-size: 18px;
    font-weight: 600;
    margin: 0;
    line-height: 1.4;
}

.product-card-desc {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 18px;
    font-size: 14px;
}

.product-sub-heading {
    color: var(--primary-blue);
    font-size: 15px;
    font-weight: 600;
    margin-bottom: 14px;
    margin-top: 4px;
}

.product-features {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.feature-item {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    background: #f0f7ff;
    border-radius: 6px;
    font-size: 13px;
    color: var(--text-light);
    transition: background 0.2s ease;
}

.feature-item:hover {
    background: #e3effc;
}

.feature-check {
    color: var(--accent-orange);
    font-weight: bold;
    flex-shrink: 0;
}

.feature-icon-blue {
    color: #2563eb;
    flex-shrink: 0;
}

.feature-icon-teal {
    color: #0d9488;
    flex-shrink: 0;
}

.feature-highlight {
    background: #fff8f0;
}

.feature-highlight:hover {
    background: #ffeedd;
}

.feature-material {
    background: #f0fdfa;
}

.feature-material:hover {
    background: #ccfbf1;
}

/* Responsive */
@media (max-width: 900px) {
    .product-series-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 600px) {
    .product-series-grid .product-card {
        padding: 20px 18px 18px;
    }

    .product-card-header {
        gap: 10px;
    }

    .product-number {
        min-width: 34px;
        height: 34px;
        font-size: 14px;
    }

    .product-card-title {
        font-size: 16px;
    }

    .product-features {
        gap: 8px;
    }

    .feature-item {
        padding: 6px 10px;
        font-size: 12px;
    }
}
   Sub-page Wall utility classes (continued)
   ============================================ */

/* Feature list item */
.feature-list-item {
    padding: 10px 15px;
    background: var(--light-gray);
    border-radius: 4px;
}

/* Feature icon */
.feature-icon {
    color: var(--accent-orange);
    font-weight: bold;
}

/* Body text small */
.body-text-sm {
    color: var(--text-light);
    line-height: 1.7;
}

/* Sub-heading */
.sub-heading {
    color: var(--primary-blue);
    margin-bottom: 8px;
}

/* Product image */
.product-img {
    width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

/* Center text */
.text-center {
    text-align: center;
}

/* Small muted text */
.text-muted-sm {
    margin-top: 10px;
    color: var(--text-light);
    font-size: 14px;
}

/* Large icon */
.icon-large {
    font-size: 36px;
    margin-bottom: 12px;
}

/* Feature grid 2-col */
.feature-grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

/* Feature grid 3-col */
.feature-grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
}

/* Feature grid 3-col wide */
.feature-grid-3-wide {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

/* Feature grid 2-col wide */
.feature-grid-2-wide {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

/* Feature grid 3-col compact */
.feature-grid-3-compact {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 20px;
}

/* FAQ card */
.faq-card {
    background: var(--white);
    border-radius: 8px;
    padding: 24px;
    box-shadow: 0 2px 12px rgba(0,0,0,0.06);
}

/* FAQ heading */
.faq-heading {
    color: var(--primary-blue);
    margin-bottom: 12px;
}

/* FAQ question */
.faq-question {
    color: var(--primary-blue);
    margin: 15px 0 10px;
}

/* Max width utilities */
.max-w-800 {
    margin: 0 auto;

    max-width: 800px;
}

.max-w-1200 {
    margin: 0 auto;

    max-width: 1200px;
}

/* Hero text utilities */
.hero-text-lg {
    font-size: 2.2em;
    margin-bottom: 15px;
}

.hero-text-sub {
    font-size: 1.3em;
    opacity: 0.9;
    margin-bottom: 25px;
}

.hero-text-desc {
    max-width: 700px;
    margin: 0 auto 30px;
    line-height: 1.8;
    font-size: 1.05em;
}

.hero-text-muted {
    margin-bottom: 15px;
    opacity: 0.8;
}

/* White link button */
.link-white-btn {
    color: var(--white);
    border: 2px solid var(--white);
    padding: 12px 30px;
    border-radius: 4px;
    text-decoration: none;
    display: inline-block;
}

/* Responsive feature grids */
@media (max-width: 768px) {
    .feature-grid-2,
    .feature-grid-3,
    .feature-grid-3-wide,
    .feature-grid-2-wide,
    .feature-grid-3-compact {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   Product EAF Hero Section Styles
   (migrated from product-eaf.html inline style)
   ============================================ */

.product-hero {
    margin-top: 80px;
    padding: 60px 0;
    background: linear-gradient(135deg, #0a1628 0%, var(--primary-blue) 100%);
    color: var(--white);
    position: relative;
    overflow: hidden;
}

.product-hero::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    left: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}

.product-hero .container {
    position: relative;
    z-index: 1;
}

.product-hero-content {
    display: flex;
    align-items: center;
    gap: 40px;
}

.product-hero-text {
    flex: 1;
}

.product-hero-text h2 {
    font-size: 2.2em;
    margin-bottom: 15px;
    color: var(--accent-orange);
}

.product-hero-text p {
    font-size: 1.1em;
    opacity: 0.9;
    line-height: 1.8;
}

.product-hero-text .badge {
    display: inline-block;
    background: var(--accent-orange);
    color: var(--white);
    padding: 4px 12px;
    border-radius: 4px;
    font-size: 0.85em;
    margin-bottom: 15px;
}

.product-hero-image {
    flex: 0 0 320px;
}

.product-hero-image svg {
    width: 100%;
    height: auto;
}

/* Feature cards grid */
.feature-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 24px;
    margin: 30px 0;
}

.feature-card {
    background: var(--light-gray);
    border-radius: 8px;
    padding: 24px;
    border-left: 4px solid var(--accent-orange);
    transition: transform 0.2s, box-shadow 0.2s;
}

.feature-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.1);
}

.feature-card h4 {
    color: var(--primary-blue);
    margin-bottom: 10px;
    font-size: 1.1em;
}

/* ============================================
   Thanks Page Styles
   (migrated from thanks.html inline style)
   ============================================ */

.thanks-section {
    padding: 100px 0;
    text-align: center;
    background: var(--light-gray);
}

.thanks-icon {
    font-size: 64px;
    margin-bottom: 20px;
}

.thanks-section h1 {
    font-size: 36px;
    color: var(--primary-blue);
    margin-bottom: 15px;
}

.thanks-section p {
    font-size: 18px;
    color: var(--text-light);
    margin-bottom: 30px;
}

.btn-back {
    display: inline-block;
    padding: 12px 30px;
    background: var(--accent-orange);
    color: var(--white);
    border-radius: 4px;
    font-size: 16px;
}

.btn-back:hover {
    background: var(--accent-orange-hover);
}

/* ===== Subcategory Cards ===== */
.sub-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 20px;
    margin-top: 20px;
}

.sub-card {
    display: block;
    background: var(--white);
    border: 1px solid #e0e8f0;
    border-radius: 8px;
    padding: 24px 20px;
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.sub-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--accent-orange);
    transform: scaleY(0);
    transition: transform 0.3s ease;
}

.sub-card:hover {
    border-color: var(--accent-orange);
    box-shadow: 0 4px 16px rgba(255, 140, 53, 0.15);
    transform: translateY(-2px);
}

.sub-card:hover::before {
    transform: scaleY(1);
}

.sub-card h4 {
    margin: 0 0 8px 0;
    font-size: 17px;
    color: var(--primary-blue);
    font-weight: 600;
}

.sub-card p {
    margin: 0;
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.6;
}

.sub-card .sub-arrow {
    display: inline-block;
    margin-top: 12px;
    color: var(--accent-orange);
    font-size: 14px;
    font-weight: 500;
    opacity: 0;
    transform: translateX(-10px);
    transition: all 0.3s ease;
}

.sub-card:hover .sub-arrow {
    opacity: 1;
    transform: translateX(0);
}

/* ===== Application Scenarios ===== */
.app-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 24px;
    margin-top: 20px;
}

.app-card {
    background: var(--white);
    border-radius: 8px;
    padding: 28px 24px;
    text-align: center;
    border: 1px solid #e8ecf0;
    transition: all 0.3s ease;
}

.app-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(26, 58, 92, 0.1);
    border-color: var(--primary-blue);
}

.app-card .icon {
    font-size: 36px;
    margin-bottom: 16px;
    display: block;
}

.app-card h4 {
    margin: 0 0 10px 0;
    font-size: 17px;
    color: var(--primary-blue);
    font-weight: 600;
}

.app-card p {
    margin: 0;
    font-size: 14px;
    color: var(--text-light);
    line-height: 1.6;
}

/* ===== Service Process ===== */
.process-steps {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 16px;
    margin-top: 30px;
    position: relative;
}

.process-step {
    flex: 1;
    text-align: center;
    position: relative;
    padding: 0 8px;
}

.process-step::after {
    content: '→';
    position: absolute;
    right: -10px;
    top: 28px;
    font-size: 20px;
    color: var(--accent-orange);
    font-weight: bold;
}

.process-step:last-child::after {
    display: none;
}

.step-num {
    display: inline-flex;
    align-items: center;
    justify-content: center;

    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-blue), #2a5a8b);
    color: var(--white);
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 16px;
    box-shadow: 0 4px 12px rgba(26, 58, 92, 0.25);
}

.process-step h4 {
    margin: 0 0 8px 0;
    font-size: 16px;
    color: var(--primary-blue);
    font-weight: 600;
}

.process-step p {
    margin: 0;
    font-size: 13px;
    color: var(--text-light);
    line-height: 1.6;
}

/* Mobile responsive */
@media (max-width: 768px) {
    .process-steps {
        flex-direction: column;
        gap: 20px;
    }

    .process-step::after {
        content: '↓';
        right: 50%;
        top: auto;
        bottom: -16px;
        transform: translateX(50%);
    }

    .process-step:last-child::after {
        display: none;
    }

    .hero-cta-card {
        padding: 20px 16px;
    }

    .hero-cta-card .btn-hero-primary,
    .hero-cta-card .btn-hero-outline {
        padding: 12px 24px;
        font-size: 15px;
    }
}

/* Technical Parameters: tables + image side by side */
.tech-params-layout {
    display: flex;
    gap: 32px;
    align-items: flex-start;
}

.tech-params-tables {
    flex: 1;
    min-width: 0;
}

.tech-params-image {
    flex: 0 0 45%;
    max-width: 45%;
}

.tech-params-image img {
    width: 100%;
    height: auto;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
}

@media (max-width: 900px) {
    .tech-params-layout {
        flex-direction: column;
    }

    .tech-params-image {
        flex: 1;
        max-width: 100%;
    }
}

/* Social Media QR Codes Section */
.qr-section {
    padding: 60px 0;
    background: var(--light-gray);
}

.qr-grid {
    display: flex;
    gap: 32px;
    justify-content: center;
    flex-wrap: wrap;
}

.qr-item {
    background: white;
    border-radius: 12px;
    padding: 24px;
    text-align: center;
    box-shadow: var(--shadow);
    flex: 0 0 280px;
    max-width: 300px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.qr-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.12);
}

.qr-item img {
    width: 200px;
    height: 200px;
    object-fit: contain;
    border-radius: 8px;
    margin-bottom: 16px;
}

.qr-item p {
    margin: 0;
    font-size: 16px;
    font-weight: 600;
    color: var(--primary-blue);
}

@media (max-width: 768px) {
    .qr-grid {
        gap: 20px;
    }
    
    .qr-item {
        flex: 0 0 100%;
        max-width: 280px;
    }
    
    .qr-item img {
        width: 180px;
        height: 180px;
    }
}

/* --- Global Steel News Widget --- */
.section-news-widget {
    background: var(--light-gray);
    padding: 60px 0;
}

.section-title {
    text-align: center;
    font-size: 28px;
    color: var(--primary-blue);
    margin-bottom: 10px;
}

.section-subtitle {
    text-align: center;
    font-size: 16px;
    color: var(--text-light);
    margin-bottom: 40px;
}

.news-widget-loading p,
.news-widget-error p {
    text-align: center;
    color: var(--text-light);
    font-size: 14px;
}

.global-news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 24px;
}

.global-news-card {
    background: var(--white);
    border-radius: 8px;
    padding: 20px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.global-news-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-2px);
}

.global-news-card-source {
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 12px;
}

.global-news-card-source .source-name {
    color: var(--accent-orange);
    font-weight: 600;
}

.global-news-card-source .source-date {
    color: var(--text-light);
}

.global-news-card-title {
    font-size: 16px;
    line-height: 1.5;
    margin: 0;
}

.global-news-card-title a {
    color: var(--primary-blue);
    font-weight: 600;
}

.global-news-card-title a:hover {
    color: var(--accent-orange);
}

.global-news-card-desc {
    font-size: 13px;
    color: var(--text-light);
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.global-news-card-tag {
    display: inline-block;
    background: var(--primary-blue);
    color: var(--white);
    padding: 2px 10px;
    border-radius: 4px;
    font-size: 11px;
    align-self: flex-start;
}

/* Responsive */
@media (max-width: 768px) {
    .global-news-grid {
        grid-template-columns: 1fr;
    }
    
    .section-title {
        font-size: 22px;
    }
}