/* 基础重置 */
:root {
    --primary-color: #E60012; /* 网易红 */
    --primary-hover: #cc000f;
    --text-main: #333333;
    --text-light: #666666;
    --bg-light: #f8f9fa;
    --white: #ffffff;
    --border-color: #eeeeee;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
    line-height: 1.6;
    color: var(--text-main);
    background-color: var(--white);
}

a {
    text-decoration: none;
    color: var(--primary-color);
    transition: color 0.3s;
}

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

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

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 10px 24px;
    border-radius: 4px;
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-primary, .btn-download {
    background-color: var(--primary-color);
    color: var(--white);
    border: 2px solid var(--primary-color);
}

.btn-primary:hover, .btn-download:hover {
    background-color: var(--primary-hover);
    border-color: var(--primary-hover);
    color: var(--white);
}

.btn-outline {
    background-color: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-outline:hover {
    background-color: var(--primary-color);
    color: var(--white);
}

.btn-large {
    padding: 14px 32px;
    font-size: 1.1rem;
}

.text-center {
    text-align: center;
}

/* 导航栏 */
.header {
    background-color: var(--white);
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

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

.nav-links a {
    margin-left: 20px;
    color: var(--text-main);
    font-weight: 500;
}

.nav-links a.btn-primary {
    color: var(--white);
}

/* Hero Section */
.hero {
    padding: 80px 0;
    background: linear-gradient(135deg, #fff5f5 0%, #ffffff 100%);
}

.hero-content {
    display: flex;
    align-items: center;
    gap: 40px;
}

.hero-text {
    flex: 1;
}

.hero-text h1 {
    font-size: 2.5rem;
    margin-bottom: 20px;
    color: #111;
    line-height: 1.2;
}

.hero-text p {
    font-size: 1.1rem;
    color: var(--text-light);
    margin-bottom: 30px;
}

.hero-buttons {
    display: flex;
    gap: 15px;
}

.hero-image {
    flex: 1;
}

.mockup-placeholder {
    width: 100%;
    height: 350px;
    background-color: #ffe6e6;
    border: 2px dashed #ffb3b3;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: var(--primary-color);
    font-weight: bold;
}

/* Features */
.features-section {
    padding: 80px 0;
    background-color: var(--white);
}

.features-section h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 10px;
}

.section-subtitle {
    text-align: center;
    color: var(--text-light);
    margin-bottom: 50px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.feature-card {
    background: var(--bg-light);
    padding: 30px;
    border-radius: 8px;
    transition: transform 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0,0,0,0.05);
}

.feature-card .icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.feature-card h3 {
    margin-bottom: 15px;
    font-size: 1.2rem;
}

.feature-card p {
    color: var(--text-light);
    font-size: 0.95rem;
}

/* Download Section */
.download-section {
    padding: 80px 0;
    background-color: #fafafa;
}

.download-section h2 {
    font-size: 2rem;
    margin-bottom: 15px;
}

.download-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 20px;
    margin-top: 40px;
}

.download-card {
    background: var(--white);
    padding: 30px 20px;
    border-radius: 8px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.02);
    border: 1px solid var(--border-color);
}

.download-card h3 {
    margin-bottom: 10px;
}

.download-card p {
    color: var(--text-light);
    margin-bottom: 20px;
    font-size: 0.9rem;
    height: 40px;
}

.download-card .btn {
    width: 100%;
}

.security-notice {
    margin-top: 30px;
    color: #28a745;
    font-weight: bold;
}

/* FAQ */
.faq-section {
    padding: 80px 0;
}

.faq-section h2 {
    text-align: center;
    font-size: 2rem;
    margin-bottom: 40px;
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: 30px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 20px;
}

.faq-item h3 {
    font-size: 1.1rem;
    margin-bottom: 10px;
    color: #222;
}

.faq-item p {
    color: var(--text-light);
}

/* Footer */
.footer {
    background-color: #222;
    color: #ccc;
    padding: 60px 0 20px;
}

.footer-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 30px;
    margin-bottom: 40px;
}

.footer-info {
    flex: 2;
    min-width: 300px;
}

.footer-info h4, .footer-links h4, .footer-legal h4 {
    color: #fff;
    margin-bottom: 15px;
}

.footer-links, .footer-legal {
    flex: 1;
    min-width: 150px;
}

.footer ul {
    list-style: none;
}

.footer ul li {
    margin-bottom: 10px;
}

.footer ul li a {
    color: #ccc;
}

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

.copyright {
    text-align: center;
    border-top: 1px solid #444;
    padding-top: 20px;
    font-size: 0.85rem;
}

/* 响应式 */
@media (max-width: 768px) {
    .hero-content {
        flex-direction: column;
        text-align: center;
    }
    .hero-buttons {
        justify-content: center;
    }
    .nav-links a {
        display: none;
    }
    .nav-links a.btn-primary {
        display: inline-block;
    }
}