/* ========================================
   VIEWTOP TECHNOLOGY - Main Stylesheet
   Network Communication Solutions
   ======================================== */

:root {
    --primary: #1a56db;
    --primary-dark: #1e429f;
    --secondary: #f59e0b;
    --dark: #111827;
    --light: #f9fafb;
    --text: #111827;
    --text-light: #4b5563;
    --border: #e5e7eb;
    --success: #059669;
    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-display: 'Roboto Condensed', sans-serif;
    --transition: all 0.3s ease;
    --shadow: 0 4px 12px rgba(0,0,0,0.15);
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font-main); line-height: 1.6; color: var(--text); background: #fff; }
h1,h2,h3,h4,h5,h6 { font-family: var(--font-display); font-weight: 700; }
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-dark); }
img { max-width: 100%; height: auto; display: block; }

/* Navigation */
#mainNav { background: transparent; padding: 1rem 0; transition: var(--transition); position: fixed; width: 100%; top: 0; z-index: 1030; }
#mainNav.scrolled { background: rgba(26,26,46,0.95); backdrop-filter: blur(10px); padding: 0.5rem 0; box-shadow: var(--shadow); }
#mainNav .navbar-brand { display: flex; flex-direction: column; line-height: 1; }
#mainNav .logo-text { font-size: 1.5rem; font-weight: 700; color: white; letter-spacing: -0.025em; }
#mainNav .logo-sub { font-size: 0.625rem; font-weight: 500; color: rgba(255,255,255,0.7); letter-spacing: 0.1em; text-transform: uppercase; }
#mainNav.scrolled .logo-text { color: white; }
#mainNav .nav-link { color: rgba(255,255,255,0.85) !important; font-weight: 500; text-transform: uppercase; letter-spacing: 0.5px; position: relative; padding: 0.5rem 0.75rem !important; transition: var(--transition); }
#mainNav .nav-link::before { content: ''; position: absolute; bottom: 5px; left: 0.75rem; right: 0.75rem; height: 2px; background: var(--secondary); transform: scaleX(0); transition: var(--transition); }
#mainNav .nav-link:focus,
#mainNav .nav-link:active { outline: none !important; box-shadow: none !important; background: transparent !important; }
#mainNav .nav-link.active::before { transform: scaleX(1); background: var(--secondary) !important; }
#mainNav .nav-link:hover::before { transform: scaleX(1); }
#mainNav .nav-link:hover,
#mainNav .nav-link.active { color: white !important; font-weight: 700; border: none !important; box-shadow: none !important; background: transparent !important; }
#mainNav .dropdown-menu { border: none; box-shadow: var(--shadow); border-radius: 8px; margin-top: 0; border-top: 3px solid var(--secondary) !important; }
#mainNav .dropdown-toggle::after { display: none !important; } /* 隐藏 Bootstrap 默认箭头，下划线现在使用 ::before */
.btn-quote { background: var(--secondary); border: none; color: white; font-weight: 600; padding: 0.6rem 1.5rem; text-transform: uppercase; border-radius: 4px; }
.btn-quote:hover { background: #e55a2b; transform: translateY(-2px); }

/* Desktop Dropdown Hover - 鼠标悬停显示下拉菜单 */
@media (min-width: 992px) {
    #mainNav .dropdown { position: relative; }
    #mainNav .dropdown > a { }
    #mainNav .dropdown-menu {
        display: block;
        opacity: 0;
        visibility: hidden;
        transform: translateY(10px);
        transition: all 0.3s ease;
        pointer-events: none;
    }
    #mainNav .dropdown:hover > .dropdown-menu,
    #mainNav .dropdown-menu:hover {
        opacity: 1;
        visibility: visible;
        transform: translateY(0);
        pointer-events: auto;
    }
    #mainNav .dropdown-menu::before {
        content: '';
        position: absolute;
        top: -20px;
        left: 0;
        right: 0;
        height: 20px;
    }
}

/* Mobile Navigation Optimization */
@media (max-width: 991px) {
    #mainNav { 
        background: rgba(26,26,46,0.98) !important; 
        padding: 0.75rem 0;
        backdrop-filter: blur(15px);
    }
    
    .navbar-collapse {
        background: rgba(26,26,46,0.98);
        margin: 0.75rem -1rem -0.75rem;
        padding: 1.5rem;
        border-top: 1px solid rgba(255,255,255,0.1);
        max-height: 80vh;
        overflow-y: auto;
    }
    
    #mainNav .nav-link {
        padding: 0.8rem 1.25rem !important;
        border-bottom: 1px solid rgba(255,255,255,0.05);
        font-size: 0.95rem;
    }
    
    #mainNav .nav-link::before {
        left: 0;
        right: auto;
        width: 4px;
        height: 1.5rem;
        bottom: auto;
        top: 50%;
        transform: translateY(-50%) scaleY(0);
        transform-origin: center;
        border-radius: 0 4px 4px 0;
    }
    
    #mainNav .nav-link.active::before,
    #mainNav .nav-link:hover::before {
        transform: translateY(-50%) scaleY(1);
    }
    
    /* Mobile Dropdown */
    .dropdown-menu {
        background: rgba(255,255,255,0.05) !important;
        border: none !important;
        box-shadow: none !important;
        margin: 0 !important;
        padding: 0 0 0 1.5rem !important;
        display: none; /* Default bootstrap behavior for collapse */
    }
    
    .dropdown-menu.show {
        display: block !important;
    }
    
    .dropdown-item {
        color: rgba(255,255,255,0.7) !important;
        padding: 0.6rem 0 !important;
        border-bottom: 1px solid rgba(255,255,255,0.05) !important;
        font-size: 0.9rem !important;
    }
    
    .dropdown-item:last-child {
        border-bottom: none !important;
    }
    
    .dropdown-toggle::after {
        display: inline-block !important;
        margin-left: 0.5rem;
        vertical-align: middle;
        content: "";
        border-top: 0.3em solid;
        border-right: 0.3em solid transparent;
        border-bottom: 0;
        border-left: 0.3em solid transparent;
        transition: transform 0.3s ease;
    }
    
    .dropdown.show .dropdown-toggle::after {
        transform: rotate(180deg);
    }
    
    .btn-quote {
        margin-top: 1.5rem;
        width: 100%;
        text-align: center;
    }
}

/* Hero Section */
.hero-section { position: relative; min-height: 100vh; display: flex; align-items: center; justify-content: center; background: var(--dark); overflow: hidden; padding-top: 72px; }
.hero-section .container { display: flex; align-items: center; justify-content: center; min-height: calc(100vh - 72px); }
.hero-bg { position: absolute; top: 0; left: 0; width: 100%; height: 100%; background-size: cover; background-position: center; z-index: 1; }
.hero-overlay { position: absolute; top: 0; left: 0; width: 100%; height: 100%; background: linear-gradient(90deg, rgba(26,86,219,0.4) 0%, rgba(17,24,39,0.85) 50%, rgba(26,86,219,0.4) 100%); z-index: 2; }
.hero-content { position: relative; z-index: 3; text-align: center; color: white; padding: 2rem; max-width: 900px; margin: auto; }
.hero-badge { display: inline-block; background: var(--secondary); color: white; padding: 0.4rem 1rem; border-radius: 20px; font-size: 0.8rem; font-weight: 600; text-transform: uppercase; margin-bottom: 1.5rem; }
.hero-title { font-size: clamp(2.5rem, 6vw, 4rem); font-weight: 700; margin-bottom: 1rem; text-transform: uppercase; letter-spacing: 1px; }
.hero-title span { color: var(--secondary); }
.hero-subtitle { font-size: 1.1rem; font-weight: 300; margin-bottom: 2rem; opacity: 0.9; }
.hero-stats { display: flex; justify-content: center; gap: 3rem; margin: 2.5rem 0; flex-wrap: wrap; }
.hero-stat { text-align: center; }
.hero-stat-number { font-size: 2.5rem; font-weight: 700; color: var(--secondary); font-family: var(--font-display); }
.hero-stat-label { font-size: 0.85rem; opacity: 0.8; text-transform: uppercase; }
.hero-buttons { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; margin-top: 2rem; }
.btn-primary-custom { background: var(--primary); border: 2px solid var(--primary); color: white; padding: 1rem 2.5rem; font-weight: 600; text-transform: uppercase; border-radius: 4px; transition: var(--transition); }
.btn-primary-custom:hover { background: var(--primary-dark); transform: translateY(-3px); box-shadow: var(--shadow); }
.btn-outline-custom { background: transparent; border: 2px solid white; color: white; padding: 1rem 2.5rem; font-weight: 600; text-transform: uppercase; border-radius: 4px; transition: var(--transition); }
.btn-outline-custom:hover { background: white; color: var(--dark); }

/* Sections */
.section-padding { padding: 5rem 0; }
.section-header { text-align: center; margin-bottom: 3.5rem; }
.section-label { display: inline-block; color: var(--secondary); font-weight: 600; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 2px; margin-bottom: 0.5rem; }
.section-title { font-size: clamp(2rem, 4vw, 2.8rem); color: var(--dark); margin-bottom: 1rem; }
.section-subtitle { color: var(--text-light); font-size: 1.1rem; }

/* About Section */
.about-section { background: var(--light); }
.about-text { font-size: 1.0625rem; color: var(--text-light); margin-bottom: 1.5rem; line-height: 1.7; }
.about-feature-item { padding: 1.5rem; background: white; border-radius: 12px; box-shadow: 0 2px 8px rgba(0,0,0,0.08); transition: var(--transition); }
.about-feature-item:hover { box-shadow: var(--shadow); transform: translateY(-2px); }
.about-feature-item i { font-size: 1.5rem; color: var(--primary); margin-bottom: 0.75rem; }
.about-feature-item h4 { font-size: 1rem; font-weight: 600; margin-bottom: 0.25rem; color: var(--text); }
.about-feature-item p { font-size: 0.875rem; color: var(--text-light); }
.about-values h3 { font-size: 1.5rem; margin-bottom: 1.5rem; color: var(--text); }
.value-list { display: flex; flex-direction: column; gap: 1.25rem; }
.value-item { display: flex; gap: 1rem; padding: 1.25rem; background: white; border-radius: 12px; box-shadow: 0 2px 8px rgba(0,0,0,0.08); }
.value-number { font-size: 1.5rem; font-weight: 700; color: var(--primary); opacity: 0.5; line-height: 1; }
.value-content h4 { font-size: 1rem; font-weight: 600; margin-bottom: 0.25rem; }
.value-content p { font-size: 0.875rem; color: var(--text-light); }

/* Products Section */
.products-section { background: white; }
.category-tabs { display: flex; justify-content: center; gap: 0.5rem; margin-bottom: 2.5rem; flex-wrap: wrap; }
.tab-btn { padding: 0.75rem 1.5rem; font-size: 0.875rem; font-weight: 500; color: var(--text-light); background: var(--light); border: none; border-radius: 50px; transition: var(--transition); cursor: pointer; }
.tab-btn:hover { background: var(--border); color: var(--text); }
.tab-btn.active { background: var(--primary); color: white; }
.product-category { display: none; }
.product-category.active { display: block; }
.category-header { text-align: center; margin-bottom: 2rem; }
.category-badge { display: inline-block; padding: 0.25rem 0.75rem; background: var(--secondary); color: white; font-size: 0.75rem; font-weight: 600; border-radius: 4px; margin-bottom: 0.75rem; }
.category-header h3 { font-size: 1.75rem; margin-bottom: 0.5rem; }
.category-header p { color: var(--text-light); }
.product-card { background: white; border-radius: 12px; overflow: hidden; box-shadow: 0 2px 8px rgba(0,0,0,0.1); transition: var(--transition); height: 100%; border: 1px solid var(--border); display: flex; flex-direction: column; }
.product-card:hover { transform: translateY(-8px); box-shadow: 0 8px 24px rgba(0,0,0,0.15); }
.product-card.featured { border: 2px solid var(--primary); }
.product-image { position: relative; height: 200px; overflow: hidden; background: linear-gradient(135deg, #f0f4f8 0%, #e2e8f0 100%); display: flex; align-items: center; justify-content: center; }
.product-image img { width: 100%; height: 100%; object-fit: cover; }
.product-placeholder { font-size: 0.875rem; font-weight: 500; color: var(--text-light); text-transform: uppercase; letter-spacing: 0.05em; }
.product-badge { position: absolute; top: 1rem; right: 1rem; padding: 0.375rem 0.75rem; background: var(--secondary); color: white; font-size: 0.75rem; font-weight: 600; border-radius: 4px; }
.product-content { padding: 1.5rem; flex: 1; display: flex; flex-direction: column; }
.product-title { font-size: 1rem; margin-bottom: 0.5rem; color: var(--text); line-height: 1.4; }
.product-title a { color: var(--text); }
.product-title a:hover { color: var(--primary); }
.product-desc { font-size: 0.875rem; color: var(--text-light); line-height: 1.5; margin-bottom: 1rem; flex: 1; }
.product-content .btn-outline-primary { 
    border: 1px solid var(--primary); 
    color: var(--primary); 
    font-size: 0.8rem; 
    font-weight: 500; 
    padding: 0.5rem 1.25rem; 
    border-radius: 4px; 
    transition: var(--transition);
    align-self: flex-start;
}
.product-content .btn-outline-primary:hover { 
    background: var(--primary); 
    color: white; 
}

/* Features Section */
.features-section { background: var(--dark); color: white; }
.features-section .section-title { color: white; }
.features-section .section-subtitle { color: rgba(255,255,255,0.7); }
.feature-card { text-align: center; padding: 2rem; }
.feature-icon { width: 80px; height: 80px; background: rgba(255,255,255,0.1); border-radius: 50%; display: flex; align-items: center; justify-content: center; margin: 0 auto 1.5rem; font-size: 2rem; color: var(--secondary); transition: var(--transition); }
.feature-card:hover .feature-icon { background: var(--secondary); color: white; transform: rotateY(360deg); }
.feature-title { font-size: 1.2rem; margin-bottom: 0.75rem; color: white; }
.feature-desc { opacity: 0.8; font-size: 0.95rem; }

/* News Section */
.news-section { background: var(--light); }
.news-card { display: flex; gap: 1.5rem; padding: 1.5rem; background: white; border-radius: 12px; box-shadow: 0 2px 8px rgba(0,0,0,0.08); border: 1px solid var(--border); transition: var(--transition); height: 100%; }
.news-card:hover { box-shadow: var(--shadow); }
.news-date { display: flex; flex-direction: column; align-items: center; justify-content: center; min-width: 60px; padding: 0.75rem; background: var(--primary); color: white; border-radius: 8px; text-align: center; }
.news-day { font-size: 1.5rem; font-weight: 700; line-height: 1; }
.news-month { font-size: 0.75rem; font-weight: 500; text-transform: uppercase; margin-top: 0.25rem; }
.news-content { flex: 1; }
.news-content h3 { font-size: 1.125rem; font-weight: 600; margin-bottom: 0.75rem; color: var(--text); }
.news-content p { font-size: 0.9375rem; color: var(--text-light); line-height: 1.6; margin-bottom: 1rem; }
.news-link { font-size: 0.875rem; font-weight: 600; color: var(--primary); }
.news-link:hover { color: var(--primary-dark); }

/* Contact Section */
.contact-section { background: linear-gradient(135deg, var(--light) 0%, #f0f9ff 100%); }
.contact-info { display: flex; flex-direction: column; gap: 2rem; }
.contact-item { display: flex; gap: 1rem; }
.contact-icon { width: 48px; height: 48px; flex-shrink: 0; color: var(--primary); font-size: 1.5rem; }
.contact-detail h4 { font-size: 1rem; font-weight: 600; margin-bottom: 0.5rem; color: var(--text); }
.contact-detail p { font-size: 0.9375rem; color: var(--text-light); line-height: 1.6; }
.contact-detail a { color: var(--primary); }
.contact-detail a:hover { color: var(--primary-dark); }
.contact-form-wrapper { background: white; padding: 2.5rem; border-radius: 12px; box-shadow: var(--shadow); }
.contact-form .form-group { margin-bottom: 1.25rem; }
.contact-form label { font-size: 0.875rem; font-weight: 500; color: var(--text); margin-bottom: 0.375rem; display: block; }
.contact-form .form-control { padding: 0.75rem 1rem; border: 1px solid var(--border); border-radius: 8px; font-size: 0.9375rem; transition: var(--transition); }
.contact-form .form-control:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(26, 86, 219, 0.1); }

/* Footer */
.footer-section { background: var(--dark); color: white; padding: 4rem 0 2rem; }
.footer-brand { margin-bottom: 1rem; }
/* Video Trigger Card */
.video-trigger-card {
    display: flex;
    align-items: center;
    background: white;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0,0,0,0.05);
    cursor: pointer;
    transition: var(--transition);
    border: 1px solid var(--border);
}

.video-trigger-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0,0,0,0.1);
    border-color: var(--secondary);
}

.video-preview {
    position: relative;
    width: 180px;
    height: 120px;
    flex-shrink: 0;
}

.video-preview img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.video-preview .play-icon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 40px;
    height: 40px;
    background: var(--secondary);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    box-shadow: 0 0 20px rgba(245, 158, 11, 0.4);
}

.video-info {
    padding: 1.5rem;
}

.video-info h4 {
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 0.3rem;
    color: var(--primary);
}

.video-info p {
    font-size: 0.85rem;
    color: var(--text-light);
    margin-bottom: 0;
}

/* Modal Customization */
.btn-close-white {
    filter: invert(1) grayscale(100%) brightness(200%);
}

.footer-logo { display: flex; flex-direction: column; line-height: 1; margin-bottom: 1rem; transition: var(--transition); }
.footer-logo:hover { opacity: 0.8; transform: translateX(5px); }
.footer-logo .logo-text { font-size: 1.5rem; font-weight: 700; color: white; }
.footer-logo .logo-sub { font-size: 0.625rem; font-weight: 500; color: rgba(255,255,255,0.6); letter-spacing: 0.1em; text-transform: uppercase; }
.footer-tagline { color: var(--secondary); font-size: 0.85rem; font-weight: 600; text-transform: uppercase; letter-spacing: 1px; }
.footer-desc { font-size: 0.9375rem; color: rgba(255,255,255,0.7); line-height: 1.6; margin-bottom: 1rem; }
.footer-cert { display: flex; gap: 0.5rem; }
.footer-cert span { padding: 0.25rem 0.5rem; background: rgba(255,255,255,0.1); color: rgba(255,255,255,0.8); font-size: 0.75rem; font-weight: 500; border-radius: 4px; }
.footer-links h4 { font-size: 1rem; font-weight: 600; color: white; margin-bottom: 1rem; }
.footer-links ul { list-style: none; padding: 0; }
.footer-links li { margin-bottom: 0.5rem; }
.footer-links a { font-size: 0.9375rem; color: rgba(255,255,255,0.7); transition: var(--transition); }
.footer-links a:hover { color: white; }
.footer-contact h4 { font-size: 1rem; font-weight: 600; color: white; margin-bottom: 1.5rem; }
.footer-contact p { font-size: 0.9375rem; color: rgba(255,255,255,0.7); line-height: 1.6; margin-bottom: 1rem; display: flex; align-items: flex-start; gap: 0.75rem; }
.footer-contact i { color: var(--secondary); font-size: 1.1rem; margin-top: 0.2rem; }
.footer-contact a { color: rgba(255,255,255,0.8); transition: var(--transition); }
.footer-contact a:hover { color: var(--secondary); }
.footer-bottom { padding-top: 2rem; border-top: 1px solid rgba(255,255,255,0.1); text-align: center; margin-top: 3rem; }
.footer-bottom p { font-size: 0.875rem; color: rgba(255,255,255,0.5); }

/* Page Header */
.page-header { position: relative; min-height: 400px; display: flex; align-items: center; background: var(--dark); overflow: hidden; padding-top: 72px; }
.page-header-bg { position: absolute; top: 0; left: 0; width: 100%; height: 100%; background: linear-gradient(90deg, rgba(26,86,219,0.3) 0%, rgba(17,24,39,0.8) 50%, rgba(26,86,219,0.3) 100%); z-index: 1; }
.page-header-overlay { position: absolute; top: 0; left: 0; width: 100%; height: 100%; background: rgba(17,24,39,0.7); z-index: 2; }
.page-header-content { position: relative; z-index: 3; text-align: center; color: white; padding: 3rem 0; }
.page-label { display: inline-block; color: var(--secondary); font-weight: 600; font-size: 0.85rem; text-transform: uppercase; letter-spacing: 2px; margin-bottom: 0.5rem; }
.page-title { font-size: clamp(2rem, 4vw, 3rem); font-weight: 700; margin-bottom: 1rem; }
.page-subtitle { font-size: 1.1rem; opacity: 0.9; margin-bottom: 1.5rem; }
.breadcrumb { background: transparent; justify-content: center; margin: 0; }
.breadcrumb-item { color: rgba(255,255,255,0.7); }
.breadcrumb-item a { color: rgba(255,255,255,0.9); }
.breadcrumb-item.active { color: var(--secondary); }
.breadcrumb-item + .breadcrumb-item::before { color: rgba(255,255,255,0.5); }

/* Services Detail Section */
.services-detail-section { background: var(--light); }
.service-detail-card { background: white; border-radius: 12px; padding: 2rem; box-shadow: 0 2px 8px rgba(0,0,0,0.08); transition: var(--transition); height: 100%; border: 1px solid var(--border); }
.service-detail-card:hover { transform: translateY(-5px); box-shadow: 0 8px 24px rgba(0,0,0,0.12); }
.service-icon-large { width: 70px; height: 70px; background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%); border-radius: 12px; display: flex; align-items: center; justify-content: center; margin-bottom: 1.5rem; font-size: 1.75rem; color: white; }
.service-detail-card h3 { font-size: 1.25rem; margin-bottom: 1rem; color: var(--text); }
.service-detail-card p { font-size: 0.95rem; color: var(--text-light); line-height: 1.6; margin-bottom: 1.25rem; }
.service-features { list-style: none; padding: 0; margin: 0; }
.service-features li { font-size: 0.9rem; color: var(--text-light); padding: 0.4rem 0; display: flex; align-items: center; gap: 0.5rem; }
.service-features li i { color: var(--success); font-size: 0.875rem; }

/* Process Section */
.process-section { background: white; }
.process-step { text-align: center; padding: 2rem 1rem; position: relative; }
.step-number { font-size: 3rem; font-weight: 700; color: var(--primary); opacity: 0.2; position: absolute; top: 0; left: 50%; transform: translateX(-50%); font-family: var(--font-display); }
.step-icon { width: 60px; height: 60px; background: var(--light); border-radius: 50%; display: flex; align-items: center; justify-content: center; margin: 2rem auto 1rem; font-size: 1.5rem; color: var(--primary); }
.process-step h4 { font-size: 1.1rem; margin-bottom: 0.5rem; color: var(--text); }
.process-step p { font-size: 0.9rem; color: var(--text-light); }

/* CTA Section */
.cta-section { background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%); }
.cta-content h2 { font-size: 2rem; color: white; margin-bottom: 1rem; }
.cta-content p { font-size: 1.1rem; color: rgba(255,255,255,0.9); max-width: 600px; margin: 0 auto 2rem; }
.cta-buttons { display: flex; gap: 1rem; justify-content: center; flex-wrap: wrap; }
.cta-section .btn-outline-custom { border-color: white; color: white; }
.cta-section .btn-outline-custom:hover { background: white; color: var(--primary); }

/* Product List Section */
.product-list-section { background: var(--light); }
.product-sidebar { position: sticky; top: 100px; }
.sidebar-widget { background: white; border-radius: 12px; padding: 1.5rem; margin-bottom: 1.5rem; box-shadow: 0 2px 8px rgba(0,0,0,0.08); }
.sidebar-widget h4 { font-size: 1.1rem; margin-bottom: 1rem; padding-bottom: 0.75rem; border-bottom: 2px solid var(--primary); }
.category-list { list-style: none; padding: 0; margin: 0; }
.category-list li { margin-bottom: 0.5rem; }
.category-list li a { display: flex; align-items: center; padding: 0.6rem 0.75rem; color: var(--text-light); border-radius: 6px; transition: var(--transition); }
.category-list li a:hover, .category-list li.active a { background: var(--light); color: var(--primary); }
.category-list li a i { margin-right: 0.5rem; font-size: 0.875rem; }
.category-list li a .count { margin-left: auto; font-size: 0.8rem; color: var(--text-muted); }
.product-toolbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1.5rem; padding: 1rem; background: white; border-radius: 8px; }
.product-count { color: var(--text-light); }
.product-count span { font-weight: 600; color: var(--primary); }
.product-sort .form-select { border: 1px solid var(--border); border-radius: 6px; padding: 0.5rem 2rem 0.5rem 1rem; font-size: 0.9rem; }
.pagination-wrapper { display: flex; justify-content: center; }

/* Product Detail Section */
.product-detail-section { background: white; }
.product-gallery { position: sticky; top: 100px; }
.product-main-image { position: relative; background: var(--light); border-radius: 12px; padding: 2rem; text-align: center; margin-bottom: 1rem; }
.product-main-image img { max-height: 400px; object-fit: contain; }
.product-badge-large { position: absolute; top: 1rem; right: 1rem; padding: 0.5rem 1rem; background: var(--secondary); color: white; font-size: 0.875rem; font-weight: 600; border-radius: 6px; }
.product-thumbnails { display: flex; gap: 0.75rem; }
.thumb-item { flex: 1; background: var(--light); border-radius: 8px; padding: 0.5rem; text-align: center; transition: var(--transition); }
.thumb-item:hover { background: var(--border); }
.thumb-item img { max-height: 80px; object-fit: contain; }
.product-info-detail { padding-left: 1rem; }
.product-title-large { font-size: 2rem; margin-bottom: 0.5rem; color: var(--text); }
.product-subtitle { font-size: 1.1rem; color: var(--text-light); margin-bottom: 1.5rem; }
.product-meta-detail { display: flex; flex-direction: column; gap: 0.75rem; margin-bottom: 1.5rem; padding: 1rem; background: var(--light); border-radius: 8px; }
.meta-item { display: flex; align-items: center; }
.meta-label { font-weight: 600; color: var(--text); min-width: 100px; }
.meta-value { color: var(--text-light); }
.certifications { display: flex; gap: 0.5rem; }
.cert-badge { padding: 0.25rem 0.5rem; background: var(--primary); color: white; font-size: 0.75rem; font-weight: 500; border-radius: 4px; }
.product-description-short { font-size: 1rem; color: var(--text-light); line-height: 1.7; margin-bottom: 1.5rem; }
.product-actions { display: flex; gap: 1rem; margin-bottom: 1.5rem; }
.product-actions .btn-lg { padding: 0.875rem 2rem; }
.product-share { display: flex; align-items: center; gap: 0.75rem; }
.product-share span { font-weight: 500; color: var(--text); }
.share-btn { width: 36px; height: 36px; display: flex; align-items: center; justify-content: center; background: var(--light); border-radius: 50%; color: var(--text-light); transition: var(--transition); }
.share-btn:hover { background: var(--primary); color: white; }

/* Product Tabs */
.product-tabs { margin-top: 2rem; }
.product-tabs .nav-tabs { border-bottom: 2px solid var(--border); margin-bottom: 1.5rem; }
.product-tabs .nav-link { font-weight: 500; color: var(--text-light); padding: 1rem 1.5rem; border: none; border-bottom: 2px solid transparent; margin-bottom: -2px; }
.product-tabs .nav-link:hover { color: var(--primary); border-color: transparent; }
.product-tabs .nav-link.active { color: var(--primary); border-bottom-color: var(--primary); background: transparent; }
.tab-content { padding: 1.5rem; background: var(--light); border-radius: 0 0 12px 12px; }
.product-content-detail { font-size: 1rem; line-height: 1.8; color: var(--text-light); }
.specs-table-wrapper { background: white; border-radius: 8px; }
.specs-table { margin: 0; }
.specs-table th { width: 200px; background: var(--light); font-weight: 600; color: var(--text); }
.specs-table td { color: var(--text-light); }
.applications-content { font-size: 1rem; line-height: 1.8; color: var(--text-light); }

/* Related Products */
.related-products-section { background: var(--light); }

/* Responsive */
@media (max-width: 991.98px) {
    .product-sidebar { position: static; margin-bottom: 2rem; }
    .product-gallery { position: static; margin-bottom: 2rem; }
    .product-info-detail { padding-left: 0; }
    .product-actions { flex-direction: column; }
    .product-actions .btn-lg { width: 100%; }
}


/* Responsive */
@media (max-width: 991.98px) {
    .hero-title { font-size: 2.5rem; }
    .hero-stats { flex-direction: column; gap: 1.5rem; }
    .category-tabs { flex-direction: column; align-items: center; }
    .tab-btn { width: 100%; max-width: 300px; text-align: center; }
    .news-card { flex-direction: column; }
}

@media (max-width: 767.98px) {
    .hero-title { font-size: 2rem; }
    .section-title { font-size: 1.75rem; }
    .hero-buttons { flex-direction: column; }
    .btn-primary-custom, .btn-outline-custom { width: 100%; }
    .contact-form-wrapper { padding: 1.5rem; }
}