/* Chanwan Electronic Co., LTD - Professional B2B Theme */

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

:root {
    --primary-blue: #0066CC;
    --primary-red: #CC0000;
    --gold: #FFB800;
    --dark-blue: #003366;
    --light-gray: #F5F5F5;
    --medium-gray: #CCCCCC;
    --dark-gray: #333333;
    --border-gray: #E0E0E0;
}

body {
    font-family: Arial, 'Microsoft YaHei', '微软雅黑', sans-serif;
    font-size: 14px;
    line-height: 1.6;
    color: var(--dark-gray);
    background-color: #fff;
}

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

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
}

h1 { font-size: 36px; }
h2 { font-size: 28px; }
h3 { font-size: 20px; }
h4 { font-size: 16px; }

/* Top Header */
.top-header {
    background-color: var(--dark-blue);
    color: white;
    padding: 8px 0;
    font-size: 13px;
}

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

.top-left span {
    margin-right: 20px;
}

.lang-btn {
    color: white;
    text-decoration: none;
    padding: 4px 12px;
    margin-left: 5px;
    border: 1px solid rgba(255,255,255,0.3);
    border-radius: 3px;
    transition: all 0.3s;
}

.lang-btn:hover, .lang-btn.active {
    background-color: var(--primary-red);
    border-color: var(--primary-red);
}

/* Main Header */
.main-header {
    background-color: white;
    border-bottom: 3px solid var(--primary-blue);
    padding: 20px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 5px rgba(0,0,0,0.1);
}

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

.logo {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.logo-image {
    height: 60px;
    width: auto;
}

.logo-text {
    display: flex;
    flex-direction: column;
    gap: 3px;
    text-align: center;
}

.company-name {
    font-size: 14px;
    color: var(--dark-gray);
    font-weight: 600;
    margin: 0;
}

.company-name-cn {
    font-size: 13px;
    color: var(--primary-red);
    font-weight: 600;
}

/* Navigation */
.main-nav ul {
    list-style: none;
    display: flex;
    gap: 8px;
}

.main-nav li {
    position: relative;
}

.main-nav a {
    color: var(--dark-gray);
    text-decoration: none;
    padding: 15px 25px;
    display: block;
    font-size: 16px;
    font-weight: 600;
    transition: all 0.3s;
    border-radius: 4px;
    white-space: nowrap;
    line-height: 1.4;
}

.main-nav a:hover, .main-nav a.active {
    background-color: var(--primary-blue);
    color: white;
}

.main-nav .dropdown {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background-color: white;
    min-width: 220px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.15);
    border-radius: 4px;
    padding: 10px 0;
}

.main-nav .has-dropdown:hover .dropdown {
    display: block;
}

.main-nav .dropdown a {
    padding: 10px 20px;
    font-size: 14px;
    border-radius: 0;
}

.main-nav .dropdown a:hover {
    background-color: var(--light-gray);
    color: var(--primary-blue);
}

/* Hero Banner */
.hero-banner {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--dark-blue) 100%);
    color: white;
    padding: 80px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero-banner::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 1200 120"><path d="M0,0 Q300,40 600,20 T1200,40 L1200,120 L0,120 Z" fill="rgba(255,255,255,0.05)"/></svg>') no-repeat bottom center;
    background-size: cover;
    opacity: 0.3;
}

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

.hero-banner h2 {
    font-size: 48px;
    margin-bottom: 15px;
    font-weight: 700;
}

.hero-banner h3 {
    font-size: 32px;
    margin-bottom: 20px;
    color: var(--gold);
}

.hero-banner p {
    font-size: 18px;
    margin-bottom: 30px;
    opacity: 0.95;
}

/* Buttons */
.btn-primary, .btn-secondary, .btn-primary-large, .btn-secondary-large {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s;
    font-size: 15px;
    border: 2px solid transparent;
}

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

.btn-primary:hover {
    background-color: #990000;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(204,0,0,0.3);
}

.btn-secondary {
    background-color: transparent;
    color: var(--primary-blue);
    border-color: var(--primary-blue);
}

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

.btn-primary-large, .btn-secondary-large {
    padding: 15px 40px;
    font-size: 16px;
}

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

.btn-primary-large:hover {
    background-color: #990000;
    box-shadow: 0 5px 15px rgba(204,0,0,0.4);
}

.btn-secondary-large {
    background-color: white;
    color: var(--primary-blue);
    border-color: white;
}

.btn-secondary-large:hover {
    background-color: var(--light-gray);
}

/* Section Styles */
section {
    padding: 60px 0;
}

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

.section-header h2 {
    color: var(--dark-blue);
    font-size: 36px;
    margin-bottom: 10px;
}

.section-header h3 {
    color: var(--primary-red);
    font-size: 24px;
    margin-bottom: 20px;
}

.divider {
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-blue), var(--primary-red));
    margin: 0 auto;
}

/* Company Introduction */
.company-intro {
    background-color: var(--light-gray);
}

.intro-content {
    max-width: 1000px;
    margin: 0 auto;
}

.intro-text p {
    font-size: 15px;
    line-height: 1.8;
    margin-bottom: 20px;
    text-align: justify;
}

.intro-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin-top: 40px;
}

.stat-item {
    text-align: center;
    background-color: white;
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    transition: transform 0.3s;
}

.stat-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 15px rgba(0,0,0,0.12);
}

.stat-number {
    font-size: 36px;
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: 10px;
}

.stat-label {
    font-size: 14px;
    color: var(--dark-gray);
    line-height: 1.4;
}

/* Product Categories */
.product-categories {
    background-color: white;
}

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

.category-card {
    background-color: white;
    border: 2px solid var(--border-gray);
    border-radius: 8px;
    overflow: hidden;
    transition: all 0.3s;
}

.category-card:hover {
    border-color: var(--primary-blue);
    box-shadow: 0 5px 20px rgba(0,102,204,0.15);
    transform: translateY(-5px);
}

.category-image {
    width: 100%;
    height: 250px;
    overflow: hidden;
    background-color: #f8f9fa;
    display: flex;
    align-items: center;
    justify-content: center;
}

.category-image img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    transition: transform 0.3s;
}

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

.category-info {
    padding: 25px;
}

.category-info h3 {
    color: var(--dark-blue);
    font-size: 22px;
    margin-bottom: 5px;
}

.category-info h4 {
    color: var(--primary-red);
    font-size: 16px;
    margin-bottom: 15px;
}

.category-info p {
    color: var(--dark-gray);
    font-size: 14px;
    line-height: 1.6;
    margin-bottom: 8px;
}

.category-info .btn-secondary {
    margin-top: 15px;
}

/* Why Choose Us */
.why-choose-us {
    background-color: var(--light-gray);
}

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

.feature-card {
    background-color: white;
    padding: 30px;
    border-radius: 8px;
    text-align: center;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    transition: all 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0,0,0,0.12);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 15px;
}

.feature-card h3 {
    color: var(--dark-blue);
    font-size: 20px;
    margin-bottom: 5px;
}

.feature-card h4 {
    color: var(--primary-red);
    font-size: 16px;
    margin-bottom: 15px;
}

.feature-card p {
    font-size: 14px;
    line-height: 1.6;
    margin-bottom: 8px;
    color: #666;
}

/* Certifications */
.certifications {
    background-color: white;
    padding: 50px 0;
}

.cert-badges {
    display: flex;
    justify-content: center;
    gap: 40px;
    flex-wrap: wrap;
}

.cert-badge {
    text-align: center;
    padding: 20px;
    background-color: var(--light-gray);
    border-radius: 8px;
    min-width: 120px;
    transition: all 0.3s;
}

.cert-badge:hover {
    background-color: var(--primary-blue);
    color: white;
    transform: scale(1.05);
}

.badge-icon {
    font-size: 36px;
    font-weight: 700;
    color: var(--primary-blue);
    margin-bottom: 10px;
}

.cert-badge:hover .badge-icon {
    color: white;
}

.cert-badge p {
    font-size: 18px;
    font-weight: 600;
}

/* Contact CTA */
.contact-cta {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--dark-blue) 100%);
    color: white;
    text-align: center;
    padding: 60px 0;
}

.contact-cta h2 {
    font-size: 36px;
    margin-bottom: 10px;
}

.contact-cta h3 {
    font-size: 28px;
    color: var(--gold);
    margin-bottom: 20px;
}

.contact-cta p {
    font-size: 16px;
    margin-bottom: 30px;
    opacity: 0.95;
}

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

/* Footer */
.main-footer {
    background-color: var(--dark-gray);
    color: white;
    padding: 50px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    margin-bottom: 40px;
}

.footer-col h3 {
    color: var(--gold);
    margin-bottom: 5px;
    font-size: 18px;
}

.footer-col h4 {
    color: var(--primary-red);
    margin-bottom: 15px;
    font-size: 14px;
}

.footer-col p {
    font-size: 13px;
    line-height: 1.6;
    color: #ccc;
}

.footer-col ul {
    list-style: none;
}

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

.footer-col ul li a {
    color: #ccc;
    text-decoration: none;
    font-size: 13px;
    transition: color 0.3s;
}

.footer-col ul li a:hover {
    color: var(--gold);
}

.contact-info li {
    color: #ccc;
    font-size: 13px;
    line-height: 1.8;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 20px;
    text-align: center;
    font-size: 13px;
    color: #999;
}

.footer-bottom p {
    margin-bottom: 5px;
}

/* Responsive Design */
@media (max-width: 768px) {
    .top-header .container {
        flex-direction: column;
        gap: 10px;
    }

    .main-header .container {
        flex-direction: column;
    }

    .main-nav ul {
        flex-direction: column;
        width: 100%;
    }

    .hero-banner h2 {
        font-size: 32px;
    }

    .hero-banner h3 {
        font-size: 24px;
    }

    .intro-stats,
    .category-grid,
    .features-grid,
    .footer-content {
        grid-template-columns: 1fr;
    }

    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn-primary-large, .btn-secondary-large {
        width: 80%;
    }
}

@media (max-width: 1024px) and (min-width: 769px) {
    .intro-stats {
        grid-template-columns: repeat(2, 1fr);
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}