/* ===== SC-002 Website - Shaanxi Hongfan Zhihui Technology Co., Ltd. ===== */

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

:root {
    --primary: #0060EA;
    --primary-light: #1A7EF6;
    --accent: #00A3AD;
    --dark: #1A3A5C;
    --light-bg: #F0FAFA;
    --white: #ffffff;
    --gray: #666666;
    --gray-light: #f5f5f5;
    --text: #333333;
}

body {
    font-family: 'Segoe UI', 'Microsoft YaHei', Arial, sans-serif;
    color: var(--text);
    line-height: 1.6;
    background: var(--white);
}

/* ===== Header / Nav ===== */
header {
    background: var(--white);
    box-shadow: 0 2px 10px rgba(0,0,0,0.08);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary);
    text-decoration: none;
}

.logo span {
    color: var(--accent);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 32px;
}

.nav-links a {
    text-decoration: none;
    color: var(--text);
    font-weight: 500;
    font-size: 15px;
    transition: color 0.3s;
    position: relative;
}

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

.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--primary);
    border-radius: 1px;
}

/* Mobile nav */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--dark);
}

/* ===== Hero Section ===== */
.hero {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: var(--white);
    padding: 80px 24px;
    text-align: center;
}

.hero h1 {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 16px;
    line-height: 1.2;
}

.hero p {
    font-size: 18px;
    opacity: 0.9;
    max-width: 600px;
    margin: 0 auto 32px;
}

.hero-btn {
    display: inline-block;
    background: var(--white);
    color: var(--primary);
    padding: 14px 36px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    font-size: 16px;
    transition: transform 0.2s, box-shadow 0.2s;
}

.hero-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0,0,0,0.15);
}

/* ===== Sections ===== */
.section {
    max-width: 1200px;
    margin: 0 auto;
    padding: 80px 24px;
}

.section-title {
    text-align: center;
    margin-bottom: 48px;
}

.section-title h2 {
    font-size: 32px;
    color: var(--dark);
    margin-bottom: 12px;
}

.section-title p {
    color: var(--gray);
    font-size: 16px;
}

/* ===== Features Grid ===== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 32px;
}

.feature-card {
    background: var(--white);
    border: 1px solid #e8e8e8;
    border-radius: 10px;
    padding: 32px 24px;
    text-align: center;
    transition: box-shadow 0.3s, transform 0.3s;
}

.feature-card:hover {
    box-shadow: 0 8px 30px rgba(0,0,0,0.1);
    transform: translateY(-4px);
}

.feature-icon {
    width: 56px;
    height: 56px;
    background: var(--light-bg);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 16px;
    font-size: 24px;
}

.feature-card h3 {
    font-size: 18px;
    color: var(--dark);
    margin-bottom: 10px;
}

.feature-card p {
    color: var(--gray);
    font-size: 14px;
    line-height: 1.6;
}

/* ===== Product Showcase ===== */
.product-showcase {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.product-showcase.reverse {
    direction: rtl;
}
.product-showcase.reverse > * {
    direction: ltr;
}

.product-image {
    background: var(--gray-light);
    border-radius: 12px;
    height: 320px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--gray);
    font-size: 14px;
}

.product-info h3 {
    font-size: 24px;
    color: var(--dark);
    margin-bottom: 16px;
}

.product-info p {
    color: var(--gray);
    margin-bottom: 16px;
    line-height: 1.7;
}

.product-specs {
    list-style: none;
    margin-bottom: 24px;
}

.product-specs li {
    padding: 8px 0;
    border-bottom: 1px solid #eee;
    color: var(--text);
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.product-specs li::before {
    content: '✓';
    color: var(--accent);
    font-weight: bold;
    flex-shrink: 0;
}

.btn-primary {
    display: inline-block;
    background: var(--primary);
    color: var(--white);
    padding: 12px 28px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: 600;
    font-size: 15px;
    transition: background 0.3s;
}

.btn-primary:hover {
    background: var(--primary-light);
}

/* ===== About Page ===== */
.about-hero {
    background: linear-gradient(135deg, var(--dark) 0%, #2a5a8c 100%);
    color: var(--white);
    padding: 60px 24px;
    text-align: center;
}

.about-hero h1 {
    font-size: 36px;
    margin-bottom: 12px;
}

.about-content {
    max-width: 900px;
    margin: 0 auto;
    padding: 60px 24px;
}

.about-content h2 {
    font-size: 24px;
    color: var(--dark);
    margin: 32px 0 16px;
    border-left: 4px solid var(--primary);
    padding-left: 12px;
}

.about-content p,
.about-content li {
    color: var(--gray);
    line-height: 1.8;
    margin-bottom: 12px;
}

.about-content ul {
    padding-left: 20px;
}

/* ===== Contact Page ===== */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    max-width: 1000px;
    margin: 0 auto;
}

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

.contact-info p {
    color: var(--gray);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.contact-form {
    background: var(--gray-light);
    padding: 32px;
    border-radius: 10px;
}

.contact-form h3 {
    font-size: 20px;
    color: var(--dark);
    margin-bottom: 20px;
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 6px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 14px;
    font-family: inherit;
    transition: border-color 0.3s;
}

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

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

.form-btn {
    background: var(--primary);
    color: var(--white);
    border: none;
    padding: 12px 32px;
    border-radius: 6px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.3s;
}

.form-btn:hover {
    background: var(--primary-light);
}

/* ===== Footer ===== */
footer {
    background: var(--dark);
    color: rgba(255,255,255,0.8);
    padding: 48px 24px 24px;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
}

.footer-col h4 {
    color: var(--white);
    font-size: 16px;
    margin-bottom: 16px;
}

.footer-col p,
.footer-col a {
    color: rgba(255,255,255,0.7);
    font-size: 14px;
    line-height: 1.8;
    text-decoration: none;
    display: block;
}

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

.footer-bottom {
    max-width: 1200px;
    margin: 32px auto 0;
    padding-top: 20px;
    border-top: 1px solid rgba(255,255,255,0.15);
    text-align: center;
    font-size: 13px;
    color: rgba(255,255,255,0.5);
}

/* ===== Page Hero (sub pages) ===== */
.page-hero {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: var(--white);
    padding: 60px 24px;
    text-align: center;
}

.page-hero h1 {
    font-size: 36px;
    margin-bottom: 10px;
}

.page-hero p {
    opacity: 0.9;
    font-size: 16px;
}

/* ===== Contact Form ===== */
.form-group {
    margin-bottom: 18px;
}
.form-group label {
    display: block;
    font-size: 15px;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: 6px;
}
.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid #d1d5db;
    border-radius: 8px;
    font-size: 16px;
    font-family: inherit;
    color: var(--text);
    transition: border-color 0.2s;
    background: #fff;
}
.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(0, 96, 234, 0.1);
}
.form-group textarea {
    resize: vertical;
    min-height: 100px;
}
.btn-submit {
    width: 100%;
    padding: 14px;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 700;
    cursor: pointer;
    transition: background 0.2s;
}
.btn-submit:hover {
    background: var(--primary-light);
}
.btn-submit:active {
    transform: scale(0.98);
}

/* ===== Responsive Media Queries ===== */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--white);
        flex-direction: column;
        padding: 20px 24px;
        box-shadow: 0 4px 10px rgba(0,0,0,0.1);
        gap: 16px;
    }
    .nav-links.open {
        display: flex;
    }
    .nav-toggle {
        display: block;
    }
    .hero h1 {
        font-size: 28px;
    }
    .hero {
        padding: 60px 20px;
    }
    .product-showcase {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    .product-showcase.reverse {
        direction: ltr;
    }
    .contact-grid {
        grid-template-columns: 1fr;
    }
    .section {
        padding: 60px 20px;
    }
    .form-group label {
        font-size: 14px;
    }
    .form-group input,
    .form-group textarea {
        font-size: 15px;
    }
}
/* ===== Language Toggle ===== */
.lang-toggle {
    background: none;
    border: 1.5px solid var(--primary);
    color: var(--primary);
    padding: 5px 12px;
    border-radius: 6px;
    font-size: 13px;
    font-weight: 700;
    cursor: pointer;
    transition: background 0.2s, color 0.2s;
    font-family: inherit;
}
.lang-toggle:hover {
    background: var(--primary);
    color: #fff;
}
@media (max-width: 768px) {
    .lang-toggle {
        display: inline-block;
        margin-right: 8px;
    }
}