/* Website 83 - Clean Split Layout */
:root {
    --primary-color: #e74c3c;
    --primary-dark: #c0392b;
    --secondary-color: #2c3e50;
    --accent-color: #3498db;
    --bg-white: #ffffff;
    --bg-light: #f8f9fa;
    --bg-gray: #f0f2f5;
    --card-bg: #ffffff;
    --text-primary: #1a1a1a;
    --text-secondary: #4a4a4a;
    --text-muted: #888888;
    --border-color: #e5e5e5;
    --shadow: 0 4px 20px rgba(0,0,0,0.08);
    --shadow-hover: 0 8px 30px rgba(0,0,0,0.12);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', -apple-system, sans-serif;
    background: var(--bg-light);
    color: var(--text-primary);
    line-height: 1.6;
}

.split-container {
    display: flex;
    min-height: 100vh;
}

.split-left {
    width: 420px;
    min-height: 100vh;
    background: var(--bg-white);
    padding: 2.5rem;
    display: flex;
    flex-direction: column;
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    border-right: 1px solid var(--border-color);
    overflow-y: auto;
}

.left-content {
    position: relative;
    z-index: 2;
}

.logo-badge {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 2rem;
}

.logo-icon {
    font-size: 2rem;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.logo-text .highlight {
    color: var(--primary-color);
}

.hero-title {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.4;
    margin-bottom: 0.75rem;
}

.hero-subtitle {
    display: block;
    font-size: 1rem;
    font-weight: 400;
    color: var(--primary-color);
    margin-top: 0.25rem;
}

.hero-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.hero-features {
    margin-bottom: 1.5rem;
}

.hero-feature {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.hero-feature:last-child {
    border-bottom: none;
}

.feature-icon {
    font-size: 1.1rem;
}

.hero-cta {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-bottom: 2rem;
}

.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.9rem 1.5rem;
    background: var(--primary-color);
    color: #fff;
    text-decoration: none;
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.95rem;
    transition: var(--transition);
}

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(231, 76, 60, 0.3);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.9rem 1.5rem;
    background: transparent;
    color: var(--text-primary);
    text-decoration: none;
    border-radius: 10px;
    font-weight: 600;
    font-size: 0.95rem;
    border: 2px solid var(--border-color);
    transition: var(--transition);
}

.btn-secondary:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.hero-stats {
    display: flex;
    gap: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.stat {
    text-align: center;
    flex: 1;
}

.stat-num {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.stat-txt {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.split-right {
    flex: 1;
    margin-left: 420px;
    background: var(--bg-light);
    min-height: 100vh;
}

.right-content {
    padding: 2rem 3rem;
}

.top-nav {
    display: flex;
    gap: 0.5rem;
    padding: 1rem 1.5rem;
    background: var(--card-bg);
    border-radius: 12px;
    margin-bottom: 2rem;
    box-shadow: var(--shadow);
    overflow-x: auto;
    flex-wrap: nowrap;
}

.nav-link {
    padding: 0.6rem 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    border-radius: 8px;
    white-space: nowrap;
    transition: var(--transition);
}

.nav-link:hover {
    color: var(--primary-color);
    background: rgba(231, 76, 60, 0.08);
}

.nav-link.active {
    color: var(--primary-color);
    background: rgba(231, 76, 60, 0.1);
}

.section-label {
    display: inline-block;
    padding: 0.4rem 1rem;
    background: rgba(231, 76, 60, 0.1);
    color: var(--primary-color);
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.section-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
}

.cards-section {
    margin-bottom: 2.5rem;
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
}

.main-card {
    background: var(--card-bg);
    border-radius: 16px;
    padding: 1.5rem;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.main-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}

.card-icon-wrap {
    width: 50px;
    height: 50px;
    background: rgba(231, 76, 60, 0.1);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
}

.card-icon {
    font-size: 1.5rem;
}

.main-card h3 {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.main-card p {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
    line-height: 1.6;
}

.card-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-color);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 600;
    transition: var(--transition);
}

.card-link:hover {
    gap: 0.75rem;
}

.why-section {
    margin-bottom: 2.5rem;
}

.why-content {
    background: var(--card-bg);
    border-radius: 16px;
    padding: 2rem;
    box-shadow: var(--shadow);
}

.why-content h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
}

.why-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.why-item {
    text-align: center;
    padding: 1.5rem;
    background: var(--bg-gray);
    border-radius: 12px;
}

.why-num {
    display: block;
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary-color);
    opacity: 0.3;
    margin-bottom: 0.75rem;
}

.why-item h4 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.why-item p {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.cta-section {
    margin-bottom: 2.5rem;
}

.cta-content {
    background: linear-gradient(135deg, var(--secondary-color), #34495e);
    border-radius: 16px;
    padding: 3rem;
    text-align: center;
}

.cta-content h2 {
    font-size: 1.75rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 0.75rem;
}

.cta-content p {
    color: rgba(255,255,255,0.8);
    margin-bottom: 1.5rem;
    font-size: 1rem;
}

.cta-btn {
    display: inline-flex;
    padding: 1rem 2.5rem;
    background: var(--primary-color);
    color: #fff;
    text-decoration: none;
    border-radius: 10px;
    font-weight: 600;
    transition: var(--transition);
}

.cta-btn:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

.footer {
    background: var(--card-bg);
    border-radius: 16px;
    padding: 2rem;
    box-shadow: var(--shadow);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 2rem;
    margin-bottom: 1.5rem;
}

.footer-logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
}

.footer-brand p {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-top: 0.25rem;
}

.footer-links {
    display: flex;
    gap: 1.5rem;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: var(--transition);
}

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

.footer-contact {
    text-align: right;
}

.footer-contact p {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.footer-bottom {
    text-align: center;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
    color: var(--text-muted);
    font-size: 0.85rem;
}

@media (max-width: 1200px) {
    .cards-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .why-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 992px) {
    .split-container {
        flex-direction: column;
    }
    .split-left {
        width: 100%;
        min-height: auto;
        position: relative;
        padding: 2rem;
    }
    .split-right {
        margin-left: 0;
    }
    .right-content {
        padding: 1.5rem;
    }
    .cards-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .why-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .cards-grid {
        grid-template-columns: 1fr;
    }
    .why-grid {
        grid-template-columns: 1fr;
    }
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
    .footer-contact {
        text-align: center;
    }
    .hero-stats {
        flex-direction: column;
        gap: 1rem;
    }
    .top-nav {
        padding: 0.75rem;
    }
    .nav-link {
        padding: 0.5rem 0.75rem;
        font-size: 0.85rem;
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.main-card {
    opacity: 0;
    animation: fadeInUp 0.5s ease forwards;
}

.main-card:nth-child(1) { animation-delay: 0.1s; }
.main-card:nth-child(2) { animation-delay: 0.15s; }
.main-card:nth-child(3) { animation-delay: 0.2s; }
.main-card:nth-child(4) { animation-delay: 0.25s; }
.main-card:nth-child(5) { animation-delay: 0.3s; }
.main-card:nth-child(6) { animation-delay: 0.35s; }