/**
 * Corporate Theme - Responsive Styles
 * 企业主题 - 响应式样式
 * @package Corporate_Theme
 */

/* ==========================================================================
   Tablet (768px - 1024px)
   ========================================================================== */
@media (max-width: 1024px) {
    .container {
        padding: 0 15px;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .section-title {
        font-size: 2rem;
    }
    
    /* Header & Navigation - iPad 两行布局 */
    .site-header .container {
        flex-wrap: wrap;
    }
    
    .site-branding {
        flex: 0 0 auto;
    }
    
    .main-navigation {
        width: 100%;
        order: 3;
        margin-top: 1rem;
        justify-content: space-between;
    }
    
    .primary-menu-container {
        flex: 1;
    }
    
    .primary-menu-container ul {
        gap: 1.5rem;
    }
    
    .header-actions {
        flex: 0 0 auto;
        margin-left: 0;
        gap: 1rem;
    }
    
    .header-search-form .search-field {
        width: 160px;
    }
    
    .header-search-form .search-field:focus {
        width: 200px;
    }
    
    .btn-get-quote {
        padding: 0.625rem 1.25rem;
        font-size: 0.875rem;
    }

    /* Business Areas */
    .business-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    /* Products Grid */
    .products-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    /* News Grid */
    .news-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    /* Archive Layout */
    .archive-layout {
        grid-template-columns: 200px 1fr;
        gap: 2rem;
    }

    /* Product Hero */
    .product-hero-content {
        gap: 2rem;
    }

    /* Footer */
    .footer-widgets {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ==========================================================================
   Mobile (max-width: 768px)
   ========================================================================== */
@media (max-width: 768px) {
    /* Typography */
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.5rem; }

    /* Header & Navigation */
    .site-header .container {
        flex-wrap: wrap;
    }

    .menu-toggle {
        display: block;
    }

    .main-navigation {
        width: 100%;
        order: 3;
        flex-direction: column;
        gap: 0;
    }

    .primary-menu-container {
        display: none;
        width: 100%;
    }

    .primary-menu-container.active {
        display: block;
    }

    .primary-menu-container ul {
        flex-direction: column;
        gap: 0;
    }

    .primary-menu-container li {
        border-bottom: 1px solid var(--border-color);
    }

    .primary-menu-container a {
        padding: 1rem 0;
    }
    
    /* 移动端语言切换器 */
    .header-language-switcher {
        width: 100%;
        margin-top: 1rem;
        padding-bottom: 1rem;
        border-bottom: 1px solid var(--border-color);
    }

    /* Hero Section */
    .hero-section {
        padding: 4rem 0;
    }

    .hero-title {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: stretch;
    }

    .hero-buttons .btn {
        width: 100%;
    }

    /* Sections */
    section {
        padding: 3rem 0;
    }

    .section-title {
        font-size: 1.75rem;
    }

    /* Company Intro */
    .intro-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .intro-stats {
        grid-template-columns: 1fr;
        gap: 1rem;
    }

    /* Business Areas */
    .business-grid {
        grid-template-columns: 1fr;
    }

    /* Products Grid */
    .products-grid {
        grid-template-columns: 1fr;
    }

    /* News Grid */
    .news-grid {
        grid-template-columns: 1fr;
    }

    /* Archive Layout */
    .archive-layout {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .archive-sidebar {
        position: static;
        order: -1;
    }

    /* Product Hero */
    .product-hero-content {
        grid-template-columns: 1fr;
    }

    .product-actions {
        flex-direction: column;
    }

    .product-actions .btn {
        width: 100%;
    }

    /* Tabs */
    .tabs-nav {
        flex-wrap: wrap;
    }

    .tabs-nav li {
        margin-right: 1rem;
        margin-bottom: 0.5rem;
    }

    /* Footer */
    .footer-widgets {
        grid-template-columns: 1fr;
    }

    .footer-menu-container ul {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }
}

/* ==========================================================================
   Small Mobile (max-width: 480px)
   ========================================================================== */
@media (max-width: 480px) {
    .container {
        padding: 0 10px;
    }

    .hero-title {
        font-size: 1.75rem;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .btn {
        padding: 0.625rem 1.25rem;
        font-size: 0.875rem;
    }

    .stat-number {
        font-size: 2rem;
    }

    .business-icon {
        width: 60px;
        height: 60px;
    }

    .product-content,
    .news-content {
        padding: 1rem;
    }
}

/* ==========================================================================
   Print Styles
   ========================================================================== */
@media print {
    .site-header,
    .site-footer,
    .menu-toggle,
    .hero-buttons,
    .product-actions,
    .btn {
        display: none;
    }

    body {
        font-size: 12pt;
        line-height: 1.5;
        color: #000;
    }

    a {
        color: #000;
        text-decoration: underline;
    }

    .container {
        max-width: 100%;
        padding: 0;
    }
}

/* ============================================================================
   ABOUT PAGE RESPONSIVE STYLES
   ============================================================================ */

@media (max-width: 768px) {
    /* About Hero */
    .page-about .page-title {
        font-size: 2rem;
    }
    
    .page-about .page-subtitle {
        font-size: 1.1rem;
    }
    
    /* Timeline */
    .timeline::before {
        left: 30px;
    }
    
    .timeline-item {
        width: 100%;
        left: 0 !important;
        text-align: left !important;
        padding-left: 70px !important;
        padding-right: 0 !important;
    }
    
    .timeline-item .timeline-marker {
        left: 20px !important;
        right: auto !important;
    }
    
    .timeline-year {
        font-size: 0.85rem;
    }
    
    .timeline-title {
        font-size: 1.2rem;
    }
    
    /* Global Locations */
    .global-locations {
        grid-template-columns: 1fr;
    }
    
    /* Stats */
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    
    .stat-number {
        font-size: 2.5rem;
    }
    
    .stat-label {
        font-size: 1rem;
    }
    
    /* Values */
    .values-grid {
        grid-template-columns: 1fr;
    }
    
    /* CTA */
    .about-cta h2 {
        font-size: 2rem;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: stretch;
    }
    
    .cta-buttons .btn {
        width: 100%;
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .stat-number {
        font-size: 2rem;
    }
}

/* ============================================================================
   CONTACT PAGE RESPONSIVE STYLES
   ============================================================================ */

@media (max-width: 768px) {
    .page-contact .page-title {
        font-size: 2rem;
    }
    
    .page-contact .page-subtitle {
        font-size: 1.1rem;
    }
    
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .contact-form .form-row {
        grid-template-columns: 1fr;
        gap: 0;
    }
    
    .contact-info-item {
        flex-direction: column;
        text-align: center;
    }
    
    .contact-icon {
        margin: 0 auto;
    }
}

/* ============================================================================
   404 ERROR PAGE RESPONSIVE STYLES
   ============================================================================ */

@media (max-width: 768px) {
    .error-404-number {
        font-size: 6rem;
    }
    
    .error-404-title {
        font-size: 2rem;
    }
    
    .error-404-message {
        font-size: 1.1rem;
    }
    
    .error-404-search .search-form {
        flex-direction: column;
    }
    
    .error-404-links {
        flex-direction: column;
        align-items: stretch;
    }
    
    .error-404-links .btn {
        width: 100%;
    }
    
    .suggestions-grid {
        grid-template-columns: 1fr;
    }
}


/* ==========================================================================
   Hero Section 响应式
   ========================================================================== */
@media (max-width: 768px) {
    .hero-section {
        min-height: 400px;
        padding: 4rem 0;
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    /* 移动端隐藏视频背景，使用图片 */
    .hero-video-background {
        display: none;
    }
}

@media (max-width: 480px) {
    .hero-section {
        min-height: 350px;
        padding: 3rem 0;
    }
    
    .hero-title {
        font-size: 1.75rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        gap: 0.75rem;
    }
    
    .hero-buttons .btn {
        width: 100%;
    }
}