/* KangCunNong Website - Main Stylesheet Part 1 */
:root {
    --primary: #2e7540;
    --primary-light: #4a9960;
    --primary-dark: #1f5530;
    --secondary: #d97706;
    --secondary-light: #f59e0b;
    --text: #2d3748;
    --text-light: #718096;
    --bg: #ffffff;
    --bg-alt: #f7fafc;
    --bg-dark: #1a202c;
    --border: #e2e8f0;
    --radius: 8px;
    --radius-lg: 12px;
    --transition: all 0.3s ease;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
html { font-size: 16px; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", Arial, sans-serif;
    color: var(--text);
    line-height: 1.7;
    background: var(--bg);
}
a { color: var(--primary); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--primary-light); }
img { max-width: 100%; height: auto; }
ul, ol { list-style: none; }
button, input, textarea, select { font: inherit; outline: none; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.site-header {
    background: var(--bg);
    box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}
.site-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}
.logo a {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}
.logo-icon { font-size: 1.8rem; }
.main-nav { display: flex; gap: 32px; }
.main-nav a {
    color: var(--text);
    font-weight: 500;
    position: relative;
    padding: 8px 0;
}
.main-nav a::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: var(--transition);
}
.main-nav a:hover::after,
.main-nav a.active::after { width: 100%; }
.main-nav a.active { color: var(--primary); }
.nav-toggle {
    display: none;
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text);
    cursor: pointer;
}

.hero {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: #fff;
    padding: 100px 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}
.hero h1 { font-size: 3rem; margin-bottom: 20px; font-weight: 700; }
.hero .subtitle { font-size: 1.3rem; margin-bottom: 16px; opacity: 0.95; }
.hero .desc {
    font-size: 1.05rem;
    margin-bottom: 32px;
    opacity: 0.85;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}
.hero-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: var(--radius);
    font-weight: 600;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    text-decoration: none;
    font-size: 1rem;
}
.btn-primary { background: var(--secondary); color: #fff; }
.btn-primary:hover { background: var(--secondary-light); color: #fff; }
.btn-secondary { background: rgba(255,255,255,0.2); color: #fff; border: 2px solid #fff; }
.btn-secondary:hover { background: #fff; color: var(--primary); }
.btn-outline { background: transparent; color: var(--primary); border: 2px solid var(--primary); }
.btn-outline:hover { background: var(--primary); color: #fff; }
.btn-lg { padding: 16px 36px; font-size: 1.1rem; }
.section { padding: 80px 0; }
.section-alt { background: var(--bg-alt); }
.section-title { text-align: center; margin-bottom: 60px; }
.section-title h2 { font-size: 2.2rem; color: var(--text); margin-bottom: 16px; font-weight: 700; }
.section-title p { color: var(--text-light); font-size: 1.05rem; max-width: 700px; margin: 0 auto; }
.section-title .accent-line { width: 60px; height: 4px; background: var(--primary); margin: 16px auto 0; border-radius: 2px; }
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 24px;
}
.feature-card {
    background: var(--bg);
    padding: 32px 24px;
    border-radius: var(--radius-lg);
    box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1);
    transition: var(--transition);
    text-align: center;
    border: 1px solid var(--border);
}
.feature-card:hover { transform: translateY(-8px); border-color: var(--primary); }
.feature-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
}
.feature-card h3 { font-size: 1.2rem; margin-bottom: 12px; color: var(--text); }
.feature-card .subtitle { color: var(--primary); font-size: 0.9rem; margin-bottom: 12px; font-weight: 500; }
.feature-card p { color: var(--text-light); font-size: 0.95rem; line-height: 1.7; }
.tabs { display: flex; justify-content: center; gap: 12px; margin-bottom: 40px; flex-wrap: wrap; }
.tab {
    padding: 10px 24px;
    background: var(--bg);
    border: 2px solid var(--border);
    border-radius: 30px;
    color: var(--text);
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
}
.tab.active, .tab:hover { background: var(--primary); color: #fff; border-color: var(--primary); }

.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}
.about-image {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    height: 400px;
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 5rem;
}
.about-content h2 { font-size: 2rem; margin-bottom: 20px; }
.about-content p { margin-bottom: 16px; color: var(--text-light); font-size: 1.05rem; }
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 24px;
}
.stat-card {
    background: var(--bg);
    padding: 32px 20px;
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1);
}
.stat-number { font-size: 2.5rem; font-weight: 700; color: var(--primary); margin-bottom: 8px; }
.stat-label { color: var(--text-light); font-size: 0.95rem; }
.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
}
.news-card {
    background: var(--bg);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1);
    transition: var(--transition);
    border: 1px solid var(--border);
}
.news-card:hover { transform: translateY(-4px); }
.news-content { padding: 24px; }
.news-date { color: var(--text-light); font-size: 0.85rem; margin-bottom: 12px; }
.news-card h3 { font-size: 1.15rem; margin-bottom: 12px; line-height: 1.4; }
.news-card h3 a { color: var(--text); }
.news-card h3 a:hover { color: var(--primary); }
.news-summary { color: var(--text-light); font-size: 0.95rem; line-height: 1.6; }
.news-detail {
    max-width: 800px;
    margin: 0 auto;
    background: var(--bg);
    padding: 40px;
    border-radius: var(--radius-lg);
    box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1);
}
.news-detail h1 { font-size: 1.8rem; margin-bottom: 16px; }
.news-detail .meta {
    color: var(--text-light);
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border);
}
.news-detail .content { font-size: 1.05rem; line-height: 1.8; }
.news-detail .content p { margin-bottom: 16px; }
.news-detail .content strong { color: var(--primary); }
.download-hero {
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    color: #fff;
    padding: 80px 0;
    text-align: center;
}
.download-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    margin-top: -60px;
    background: var(--bg);
    padding: 40px;
    border-radius: var(--radius-lg);
    box-shadow: 0 10px 25px -3px rgba(0,0,0,0.1);
}
.qr-code {
    width: 240px;
    height: 240px;
    background: var(--bg-alt);
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
    margin: 0 auto;
}
.app-info h2 { font-size: 1.8rem; margin-bottom: 16px; }
.app-info-list { margin: 24px 0; }
.app-info-list li { display: flex; justify-content: space-between; padding: 12px 0; border-bottom: 1px solid var(--border); }
.app-info-list li:last-child { border-bottom: none; }
.app-info-list .label { color: var(--text-light); }
.app-info-list .value { font-weight: 500; color: var(--text); }
.download-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-top: 24px; }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; }
.contact-info-list { margin-top: 24px; }
.contact-info-list li { display: flex; gap: 16px; padding: 16px 0; border-bottom: 1px solid var(--border); }
.contact-info-list .icon {
    width: 40px;
    height: 40px;
    background: var(--bg-alt);
    color: var(--primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    font-size: 1.2rem;
}
.contact-info-list .content strong { display: block; margin-bottom: 4px; color: var(--text); }
.contact-info-list .content span { color: var(--text-light); }
.legal-content {
    max-width: 900px;
    margin: 0 auto;
    background: var(--bg);
    padding: 40px;
    border-radius: var(--radius-lg);
    box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1);
    line-height: 1.9;
}
.legal-content h1 { text-align: center; margin-bottom: 12px; font-size: 1.8rem; }
.legal-content .meta { text-align: center; color: var(--text-light); margin-bottom: 32px; padding-bottom: 24px; border-bottom: 1px solid var(--border); }
.legal-content h2 { margin: 32px 0 16px; color: var(--primary); font-size: 1.3rem; }
.legal-content h3 { margin: 20px 0 12px; font-size: 1.1rem; }
.legal-content p { margin-bottom: 12px; }
.legal-content ul { padding-left: 24px; margin-bottom: 12px; list-style: disc; }
.legal-content ol { padding-left: 24px; margin-bottom: 12px; list-style: decimal; }

.site-footer {
    background: var(--bg-dark);
    color: #cbd5e0;
    padding: 60px 0 20px;
    margin-top: 80px;
}
.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}
.footer-col h4 { color: #fff; margin-bottom: 20px; font-size: 1.05rem; }
.footer-col p { margin-bottom: 12px; font-size: 0.9rem; }
.footer-links li { margin-bottom: 10px; }
.footer-links a { color: #cbd5e0; font-size: 0.9rem; }
.footer-links a:hover { color: var(--primary-light); }
.footer-contact li { display: flex; align-items: flex-start; gap: 8px; margin-bottom: 12px; font-size: 0.9rem; }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.1); padding-top: 20px; text-align: center; font-size: 0.85rem; }
.footer-bottom a { color: #cbd5e0; }
.footer-bottom a:hover { color: var(--primary-light); }
.footer-bottom p { margin-bottom: 8px; }
.copyright-text { color: var(--text-light); font-size: 0.85rem; }
.admin-login-page {
    min-height: 100vh;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}
.login-box {
    background: var(--bg);
    padding: 40px;
    border-radius: var(--radius-lg);
    box-shadow: 0 10px 25px -3px rgba(0,0,0,0.1);
    width: 100%;
    max-width: 400px;
}
.login-box h1 { text-align: center; margin-bottom: 32px; color: var(--primary); }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; margin-bottom: 8px; font-weight: 500; }
.form-group input, .form-group textarea, .form-group select {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border);
    border-radius: var(--radius);
    transition: var(--transition);
}
.form-group input:focus, .form-group textarea:focus, .form-group select:focus {
    border-color: var(--primary);
}
.admin-layout { display: flex; min-height: 100vh; }
.admin-sidebar {
    width: 220px;
    background: var(--bg-dark);
    color: #fff;
    padding: 20px 0;
}
.admin-sidebar h2 { text-align: center; margin-bottom: 32px; color: #fff; font-size: 1.2rem; }
.admin-sidebar ul li a {
    display: block;
    padding: 12px 24px;
    color: #cbd5e0;
    border-left: 3px solid transparent;
}
.admin-sidebar ul li a:hover, .admin-sidebar ul li a.active {
    background: rgba(255,255,255,0.05);
    color: #fff;
    border-left-color: var(--primary);
}
.admin-main { flex: 1; padding: 32px; background: var(--bg-alt); }
.admin-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border);
}
.admin-card {
    background: var(--bg);
    padding: 24px;
    border-radius: var(--radius-lg);
    box-shadow: 0 4px 6px -1px rgba(0,0,0,0.1);
    margin-bottom: 24px;
}
.alert { padding: 12px 20px; border-radius: var(--radius); margin-bottom: 20px; }
.alert-success { background: #d1fae5; color: #065f46; }
.alert-error { background: #fee2e2; color: #991b1b; }
@media (max-width: 768px) {
    .nav-toggle { display: block; }
    .main-nav {
        display: none;
        position: absolute;
        top: 70px;
        left: 0;
        right: 0;
        background: var(--bg);
        flex-direction: column;
        padding: 20px;
        box-shadow: 0 10px 25px -3px rgba(0,0,0,0.1);
        gap: 16px;
    }
    .main-nav.active { display: flex; }
    .hero h1 { font-size: 2rem; }
    .hero { padding: 60px 0; }
    .about-grid, .download-grid, .contact-grid { grid-template-columns: 1fr; gap: 30px; }
    .footer-grid { grid-template-columns: 1fr; gap: 30px; }
    .section { padding: 50px 0; }
    .section-title h2 { font-size: 1.6rem; }
    .legal-content { padding: 24px; }
    .admin-layout { flex-direction: column; }
    .admin-sidebar { width: 100%; }
}