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

:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary-color: #64748b;
    --bg-color: #f8fafc;
    --card-bg: #ffffff;
    --text-color: #1e293b;
    --text-secondary: #475569;
    --border-color: #e2e8f0;
    --code-bg: #f1f5f9;
    --success-color: #10b981;
    --info-color: #3b82f6;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans SC", "Microsoft YaHei", sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--bg-color);
}

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

header {
    background: linear-gradient(135deg, var(--primary-color) 0%, #1e40af 100%);
    color: white;
    padding: 60px 20px;
    text-align: center;
    box-shadow: var(--shadow-lg);
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    font-weight: 700;
}

.subtitle {
    font-size: 1.2rem;
    opacity: 0.95;
}

main {
    padding: 40px 20px;
}

section {
    background: var(--card-bg);
    border-radius: 12px;
    padding: 40px;
    margin-bottom: 30px;
    box-shadow: var(--shadow);
}

h2 {
    font-size: 2rem;
    margin-bottom: 20px;
    color: var(--text-color);
    border-bottom: 3px solid var(--primary-color);
    padding-bottom: 10px;
}

h3 {
    font-size: 1.5rem;
    margin: 30px 0 15px;
    color: var(--text-color);
}

h4 {
    font-size: 1.2rem;
    margin: 20px 0 10px;
    color: var(--text-color);
}

p {
    margin-bottom: 15px;
    color: var(--text-secondary);
}

ul, ol {
    margin-left: 25px;
    margin-bottom: 15px;
}

li {
    margin-bottom: 8px;
    color: var(--text-secondary);
}

.platform-section {
    background: var(--bg-color);
    border-radius: 8px;
    padding: 25px;
    margin-bottom: 25px;
    border-left: 4px solid var(--primary-color);
}

.platform-section h3 {
    margin-top: 0;
    color: var(--primary-color);
}

.install-steps {
    margin-top: 15px;
}

.download-links {
    list-style: none;
    margin-left: 0;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 20px;
}

.download-links li {
    margin: 0;
}

.download-links a {
    display: inline-block;
    padding: 8px 16px;
    background: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: 6px;
    font-size: 0.9rem;
    transition: background 0.2s;
}

.download-links a:hover {
    background: var(--primary-hover);
}

.code-block {
    background: var(--code-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 15px;
    margin: 15px 0;
    position: relative;
    font-family: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", Consolas, monospace;
    overflow-x: auto;
}

.code-block code {
    color: var(--text-color);
    font-size: 0.9rem;
    display: block;
    padding-right: 80px;
}

.copy-btn {
    position: absolute;
    top: 10px;
    right: 10px;
    padding: 6px 12px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.85rem;
    transition: background 0.2s;
}

.copy-btn:hover {
    background: var(--primary-hover);
}

.copy-btn:active {
    transform: scale(0.95);
}

code {
    background: var(--code-bg);
    padding: 2px 6px;
    border-radius: 3px;
    font-family: "SF Mono", Monaco, "Cascadia Code", "Roboto Mono", Consolas, monospace;
    font-size: 0.9em;
    color: #e11d48;
}

.note {
    background: #fef3c7;
    border-left: 4px solid #f59e0b;
    padding: 12px 15px;
    margin: 15px 0;
    border-radius: 4px;
    font-size: 0.95rem;
}

.docs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
    margin-top: 25px;
}

.doc-card {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 25px;
    transition: transform 0.2s, box-shadow 0.2s;
}

.doc-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.doc-card h3 {
    margin-top: 0;
    font-size: 1.3rem;
}

.doc-card p {
    margin-bottom: 20px;
}

.btn {
    display: inline-block;
    padding: 10px 20px;
    background: var(--primary-color);
    color: white;
    text-decoration: none;
    border-radius: 6px;
    transition: background 0.2s;
    font-weight: 500;
}

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

.info-box {
    background: #eff6ff;
    border: 1px solid #bfdbfe;
    border-radius: 8px;
    padding: 20px;
    margin-top: 25px;
}

.info-box h4 {
    margin-top: 0;
    color: var(--info-color);
}

.info-box ul {
    margin-bottom: 0;
}

.architecture-info {
    margin-top: 20px;
}

.architecture-info h3 {
    margin-top: 30px;
}

.architecture-info h3:first-child {
    margin-top: 0;
}

footer {
    background: var(--text-color);
    color: white;
    text-align: center;
    padding: 30px 20px;
    margin-top: 40px;
}

footer p {
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 5px;
}

@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }

    .subtitle {
        font-size: 1rem;
    }

    section {
        padding: 25px 20px;
    }

    h2 {
        font-size: 1.6rem;
    }

    h3 {
        font-size: 1.3rem;
    }

    .platform-section {
        padding: 20px;
    }

    .download-links {
        flex-direction: column;
    }

    .download-links a {
        display: block;
        text-align: center;
    }

    .code-block code {
        font-size: 0.8rem;
        padding-right: 10px;
    }

    .copy-btn {
        position: static;
        display: block;
        width: 100%;
        margin-top: 10px;
    }

    .docs-grid {
        grid-template-columns: 1fr;
    }
}