:root {
    --primary-color: #ff2442;
    --secondary-color: #ff8ba7;
    --text-color: #333;
    --light-gray: #f5f5f5;
    --dark-gray: #666;
}

* {
    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: var(--text-color);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background-color: #f8f9fa;
}

main {
    flex: 1;
    display: flex;
    flex-direction: column;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    width: 100%;
}

/* Header */
header {
    background-color: white;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    height: 60px;
}

nav {
    height: 100%;
    display: flex;
    align-items: center;
}

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

nav h1 {
    font-size: 1.5rem;
    color: var(--primary-color);
}

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

nav ul li {
    margin-left: 2rem;
}

nav ul li a {
    text-decoration: none;
    color: var(--text-color);
    font-weight: 500;
}

/* Hero Section */
.hero {
    padding: 8rem 0 4rem;
    background-color: var(--light-gray);
    text-align: center;
}

.hero h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.cta-button {
    display: inline-block;
    padding: 1rem 2rem;
    background-color: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: 5px;
    margin-top: 2rem;
    transition: background-color 0.3s;
}

.cta-button:hover {
    background-color: var(--secondary-color);
}

/* Features Section */
.features {
    padding: 4rem 0;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1rem;
}

.feature-item {
    padding: 1rem;
    background-color: var(--light-gray);
    border-radius: 5px;
}

/* Usage Section */
.usage {
    padding: 4rem 0;
    background-color: var(--light-gray);
}

.usage-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.step {
    padding: 2rem;
    background-color: white;
    border-radius: 5px;
    text-align: center;
}

.step-number {
    display: inline-block;
    width: 40px;
    height: 40px;
    background-color: var(--primary-color);
    color: white;
    border-radius: 50%;
    line-height: 40px;
    margin-bottom: 1rem;
}

/* Download Section */
.download {
    padding: 4rem 0;
    text-align: center;
}

.download-box {
    background-color: var(--light-gray);
    padding: 2rem;
    border-radius: 5px;
    text-align: center;
    margin-top: 2rem;
}

.download-button {
    display: inline-block;
    padding: 1rem 2rem;
    background-color: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: 5px;
    margin: 1rem 0;
    transition: background-color 0.3s;
}

.download-button:hover {
    background-color: var(--secondary-color);
}

.version-info {
    color: var(--dark-gray);
    font-size: 0.9rem;
}

/* Footer */
footer {
    padding: 2rem 0;
    background-color: var(--light-gray);
    text-align: center;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .content-wrapper {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .feature-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .feature-grid {
        grid-template-columns: 1fr;
    }
    
    nav ul {
        display: none;
    }
}

/* 修改主体内容布局 */
.content-wrapper {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 4rem;
    min-height: calc(100vh - 120px);
    margin-top: 60px;
    padding: 4rem 0;
    align-items: center;
    background-color: white;
    border-radius: 20px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.05);
    margin-bottom: 2rem;
}

/* 左侧区域调整 */
.left-section {
    display: flex;
    flex-direction: column;
    gap: 3rem;
    padding: 0 2rem;
}

.left-section h2 {
    font-size: 2.8rem;
    line-height: 1.2;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.left-section > p {
    font-size: 1.2rem;
    color: var(--dark-gray);
    margin-bottom: 1rem;
}

.feature-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.feature-item {
    padding: 1.5rem;
    background-color: var(--light-gray);
    border-radius: 8px;
    transition: transform 0.3s;
}

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

/* 右侧区域调整 */
.right-section {
    display: flex;
    flex-direction: column;
    gap: 4rem;
    padding: 0 2rem;
}

.download-box {
    background: linear-gradient(145deg, var(--primary-color), var(--secondary-color));
    padding: 3rem;
    border-radius: 16px;
    text-align: center;
    box-shadow: 0 8px 16px rgba(0,0,0,0.1);
    color: white;
}

.download-box h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
}

.download-button {
    background-color: white;
    color: var(--primary-color);
    padding: 1rem 3rem;
    font-size: 1.2rem;
    font-weight: bold;
    border-radius: 8px;
    margin: 1.5rem 0;
}

.download-button:hover {
    background-color: var(--light-gray);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.1);
}

.usage-steps {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.step {
    padding: 2rem;
    background-color: var(--light-gray);
    border-radius: 12px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.05);
    transition: all 0.3s ease;
}

/* 响应式调整 */
@media (max-width: 1024px) {
    .content-wrapper {
        grid-template-columns: 1fr;
        gap: 3rem;
        padding: 3rem 1rem;
    }
    
    .left-section, .right-section {
        padding: 0 1rem;
    }
}

@media (max-width: 768px) {
    .content-wrapper {
        padding: 2rem 1rem;
        margin-top: 50px;
    }
    
    .left-section h2 {
        font-size: 2.2rem;
    }
    
    .download-box {
        padding: 2rem 1rem;
    }
}