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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f9f9f9;
}

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

a {
    color: #e50012; /* 网易红主题色 */
    text-decoration: none;
    transition: color 0.3s;
}

a:hover {
    color: #cc0010;
    text-decoration: underline;
}

/* Header & Nav */
header {
    background-color: #fff;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.logo h1, .logo h2 {
    font-size: 24px;
    font-weight: 700;
}

.logo a {
    color: #e50012;
    text-decoration: none;
}

nav ul {
    list-style: none;
    display: flex;
    gap: 20px;
}

nav a {
    color: #333;
    font-weight: 500;
    padding: 5px 10px;
    border-radius: 4px;
}

nav a:hover, nav a.active {
    background-color: #fce5e6;
    color: #e50012;
    text-decoration: none;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #e50012 0%, #ff4d4d 100%);
    color: #fff;
    text-align: center;
    padding: 80px 20px;
}

.hero h2 {
    font-size: 36px;
    margin-bottom: 20px;
}

.hero p {
    font-size: 18px;
    max-width: 800px;
    margin: 0 auto 30px;
    opacity: 0.9;
}

.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 25px;
    font-weight: bold;
    text-decoration: none;
    transition: all 0.3s;
    margin: 0 10px;
}

.btn-primary {
    background-color: #fff;
    color: #e50012;
}

.btn-primary:hover {
    background-color: #f0f0f0;
    text-decoration: none;
}

.btn-secondary {
    background-color: transparent;
    border: 2px solid #fff;
    color: #fff;
}

.btn-secondary:hover {
    background-color: #fff;
    color: #e50012;
    text-decoration: none;
}

/* Grid Layout */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.card {
    background: #fff;
    padding: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    transition: transform 0.3s;
}

.card:hover {
    transform: translateY(-5px);
}

.card h3 {
    color: #e50012;
    margin-bottom: 15px;
}

/* Content Sections */
.content-section {
    padding: 60px 0;
}

.content-section h2 {
    text-align: center;
    font-size: 30px;
    margin-bottom: 10px;
}

/* Download Section */
.download-section {
    padding: 60px 0;
    text-align: center;
}

.download-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.dl-card {
    background: #fff;
    padding: 40px 20px;
    border-radius: 12px;
    box-shadow: 0 10px 20px rgba(0,0,0,0.08);
}

.dl-card img {
    margin-bottom: 20px;
    border-radius: 16px;
}

.dl-card h3 {
    margin-bottom: 15px;
    font-size: 22px;
}

.dl-card p {
    color: #666;
    margin-bottom: 25px;
    min-height: 50px;
}

/* Features */
.features-header {
    background-color: #333;
    color: #fff;
    text-align: center;
    padding: 60px 20px;
}

.feature-item {
    background: #fff;
    padding: 30px;
    margin-bottom: 20px;
    border-radius: 8px;
    border-left: 4px solid #e50012;
    box-shadow: 0 2px 5px rgba(0,0,0,0.05);
}

.feature-item h2 {
    font-size: 22px;
    color: #333;
    text-align: left;
    margin-bottom: 10px;
}

/* FAQ Section */
.faq-section {
    padding: 60px 0;
}

.faq-list {
    margin-top: 40px;
}

.faq-item {
    background: #fff;
    padding: 25px;
    margin-bottom: 15px;
    border-radius: 8px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.faq-item h3 {
    color: #e50012;
    margin-bottom: 10px;
    font-size: 20px;
}

/* SEO Text blocks */
.seo-text {
    padding: 50px 0;
    background: #fff;
    border-top: 1px solid #eee;
}

.bg-light {
    background: #f4f4f4;
}

.seo-text h2 {
    font-size: 24px;
    margin-bottom: 20px;
}

.seo-text p {
    margin-bottom: 15px;
    color: #555;
}

/* Footer */
footer {
    background-color: #222;
    color: #ccc;
    text-align: center;
    padding: 40px 20px;
    margin-top: 40px;
}

footer p {
    margin-bottom: 10px;
}

footer a {
    color: #ccc;
}

footer a:hover {
    color: #fff;
}

/* Responsive */
@media (max-width: 768px) {
    header .container {
        flex-direction: column;
        gap: 15px;
    }
    
    .hero h2 {
        font-size: 28px;
    }
}