/* 
  Global Styles for PinGuan New Materials B2B Website
  Colors: Deep Blue (#003366), Light Grey (#F4F4F4), White (#FFFFFF), Dark Grey (#333333)
*/

:root {
    --primary-color: #003366;
    --primary-hover: #002244;
    --secondary-color: #666666;
    --bg-color: #F8F9FA;
    --text-color: #2D3436;
    --white: #ffffff;
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    background-color: var(--white);
    color: var(--text-color);
    line-height: 1.7;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, 'Open Sans', 'Helvetica Neue', sans-serif;
    -webkit-font-smoothing: antialiased;
}

/* Header & Navigation */
header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 15px rgba(0,0,0,0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.container {
    max-width: 1300px;
    margin: 0 auto;
    padding: 0 30px;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.logo a {
    display: flex;
    align-items: center;
}

.logo img {
    height: 85px;
    width: auto;
    transition: var(--transition);
}

.nav-links {
    list-style: none;
    display: flex;
    align-items: center;
}

.nav-links li {
    margin-left: 35px;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
    padding-bottom: 5px;
    transition: var(--transition);
}

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

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

.nav-links a:hover, .nav-links a.active {
    color: var(--primary-color);
}

/* Hero Section */
.hero {
    background: linear-gradient(rgba(0, 40, 80, 0.75), rgba(0, 40, 80, 0.75)), url('banner.png') no-repeat center center/cover;
    height: 500px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    color: var(--white);
    text-align: center;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 25px;
    letter-spacing: -1px;
    text-shadow: 0 2px 10px rgba(0,0,0,0.2);
}

.hero p {
    font-size: 1.25rem;
    max-width: 750px;
    margin-bottom: 40px;
    opacity: 0.9;
}

.btn {
    display: inline-block;
    padding: 14px 35px;
    background: var(--white);
    color: var(--primary-color);
    text-decoration: none;
    border-radius: 50px;
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.9rem;
    letter-spacing: 1px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.1);
    transition: var(--transition);
}

.btn:hover {
    background: var(--primary-color);
    color: var(--white);
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0,0,0,0.2);
}

/* Sections */
section {
    padding: 100px 0;
}

.section-title {
    text-align: center;
    margin-bottom: 50px;
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--primary-color);
    position: relative;
    padding-bottom: 15px;
}

.section-title::after {
    content: '';
    position: absolute;
    width: 60px;
    height: 4px;
    background: var(--primary-color);
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    border-radius: 2px;
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 35px;
}

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

@media (max-width: 1100px) {
    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
    .grid-4 {
        grid-template-columns: 1fr;
    }
}

.card {
    background: var(--bg-color);
    padding: 40px;
    border-radius: 12px;
    border-top: 6px solid var(--primary-color);
    box-shadow: 0 5px 20px rgba(0,0,0,0.05);
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 35px rgba(0,0,0,0.1);
}

/* Product Card Styles */
.product-card {
    background: var(--white);
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 15px rgba(0,0,0,0.08);
    transition: var(--transition);
    height: 100%;
    display: flex;
    flex-direction: column;
}

.product-image-wrapper {
    position: relative;
    width: 100%;
    height: 240px;
    overflow: hidden;
}

.product-card img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.img-overlay-text {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(0, 51, 102, 0.85);
    color: white;
    padding: 12px 10px;
    text-align: center;
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    pointer-events: none;
    z-index: 10;
}

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

.product-info {
    padding: 25px;
    flex-grow: 1;
}

.product-info h3 {
    margin-bottom: 15px;
    color: var(--primary-color);
    font-size: 1.3rem;
    font-weight: 700;
}

.product-info p {
    color: var(--secondary-color);
    font-size: 0.95rem;
    margin-bottom: 15px;
}

/* About Us Section */
.about-flex {
    display: flex;
    gap: 60px;
    align-items: center;
}

.about-text {
    flex: 1.2;
}

.about-img {
    flex: 1;
    position: relative;
}

.about-img img {
    width: 100%;
    border-radius: 15px;
    box-shadow: 0 15px 40px rgba(0,0,0,0.1);
}

/* Contact Page Styles */
.contact-container {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 60px;
    background: var(--white);
    padding: 40px;
    border-radius: 15px;
    box-shadow: 0 10px 40px rgba(0,0,0,0.08);
}

.contact-info h3 {
    font-size: 1.8rem;
    margin-bottom: 30px;
    color: var(--primary-color);
}

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

.info-item strong {
    color: var(--primary-color);
    min-width: 80px;
}

.whatsapp-btn {
    background: #25D366;
    color: white;
    padding: 15px 30px;
    text-decoration: none;
    border-radius: 50px;
    display: inline-flex;
    align-items: center;
    gap: 12px;
    font-weight: 700;
    margin-top: 25px;
    box-shadow: 0 5px 20px rgba(37, 211, 102, 0.3);
    transition: var(--transition);
}

.whatsapp-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 30px rgba(37, 211, 102, 0.5);
}

form {
    display: flex;
    flex-direction: column;
}

form input, form textarea {
    margin-bottom: 20px;
    padding: 15px;
    border: 1px solid #E1E8EE;
    border-radius: 8px;
    background: #F9FBFC;
    transition: var(--transition);
}

form input:focus, form textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    background: var(--white);
    box-shadow: 0 0 0 4px rgba(0, 51, 102, 0.05);
}

form button {
    padding: 18px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 700;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: var(--transition);
}

form button:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 51, 102, 0.2);
}

/* Footer */
footer {
    background: #001A33;
    color: var(--white);
    padding: 60px 0 30px;
    text-align: center;
}

.footer-links {
    margin-bottom: 35px;
}

.footer-links a {
    color: rgba(255,255,255,0.7);
    margin: 0 20px;
    text-decoration: none;
    font-size: 0.95rem;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--white);
}

.copyright {
    font-size: 0.9rem;
    color: rgba(255,255,255,0.5);
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 30px;
    margin-top: 30px;
}

/* Blog Styles */
.blog-post {
    background: var(--white);
    padding: 30px;
    border-radius: 12px;
    margin-bottom: 40px;
    display: flex;
    gap: 30px;
    align-items: flex-start;
    box-shadow: 0 5px 20px rgba(0,0,0,0.05);
    transition: var(--transition);
}

.blog-post:hover {
    transform: translateX(10px);
}

.blog-post img {
    width: 250px;
    height: 180px;
    object-fit: cover;
    border-radius: 10px;
}

.blog-content h3 {
    color: var(--primary-color);
    font-size: 1.5rem;
    margin-bottom: 12px;
}

.blog-meta {
    font-size: 0.9rem;
    color: var(--secondary-color);
    margin-bottom: 15px;
}

.read-more {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.read-more:hover {
    text-decoration: underline;
}

/* Responsive */
@media (max-width: 992px) {
    .container { padding: 0 20px; }
    
    header { padding: 10px 0; }
    nav { justify-content: center !important; }
    .logo img { height: 75px !important; }
    
    .hero { height: 400px; }
    .hero h1 { font-size: 2.2rem; }
    .hero p { font-size: 1.1rem; }
    
    .section-title { 
        font-size: 1.8rem; 
        text-align: center !important; 
    }
    
    .about-flex { 
        flex-direction: column !important; 
        text-align: center !important;
        gap: 40px !important;
    }
    
    .about-text, .about-img {
        flex: none !important;
        width: 100% !important;
    }
    
    .about-text h2, .about-text h3 {
        text-align: center !important;
    }
    
    .about-text ul { 
        text-align: left !important; 
        display: inline-block;
        margin: 20px auto 0 auto;
    }

    .about-img img {
        max-width: 100%;
        height: auto;
    }
    
    .contact-container { 
        grid-template-columns: 1fr; 
        padding: 20px;
    }
}

@media (max-width: 768px) {
    .nav-links { display: none; }
    .grid, .grid-4 { 
        grid-template-columns: 1fr !important; 
        gap: 25px;
    }
    .hero h1 { font-size: 1.8rem; }
    .blog-post { flex-direction: column; }
    .blog-post img { width: 100%; height: auto; }
}