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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: linear-gradient(135deg, #4f46e5 0%, #7c3aed 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.container {
    background: #fff;
    border-radius: 20px;
    padding: 40px;
    width: 100%;
    max-width: 450px;
    text-align: center;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

.logo-section {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    margin-bottom: 30px;
}

.app-logo {
    width: 70px;
    height: 70px;
    border-radius: 16px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.title-section h1 {
    font-size: 36px;
    color: #333;
    margin-bottom: 4px;
    text-align: left;
}

.subtitle {
    color: #888;
    font-size: 16px;
    text-align: left;
    margin: 0;
}

.invite-code {
    background: linear-gradient(135deg, #fff5e6 0%, #ffe0b2 100%);
    border: 2px solid #f59e0b;
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 30px;
}

.invite-code p {
    color: #d97706;
    font-size: 14px;
    margin-bottom: 12px;
}

.code-box {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 10px;
}

.code {
    font-size: 32px;
    font-weight: 800;
    color: #d97706;
    letter-spacing: 8px;
    background: #fff;
    padding: 10px 20px;
    border-radius: 8px;
}

.copy-btn {
    background: #f59e0b;
    color: #fff;
    border: none;
    padding: 0 20px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    transition: background 0.3s;
}

.copy-btn:hover {
    background: #d97706;
}

.tips {
    color: #d97706;
    font-size: 13px;
}

.download-buttons {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 20px;
}

.btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 16px;
    width: 100%;
    border-radius: 10px;
    border: none;
    outline: none;
    text-decoration: none;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.15);
}

.btn-android {
    background: #4f46e5;
    color: #fff;
}

.btn-ios {
    background: #0f172a;
    color: #fff;
}

.btn .icon {
    font-size: 24px;
}

.faka-section {
    margin-top: 12px;
}

.btn-faka {
    background: #10b981;
    color: #fff;
}

/* SEO内容区域样式 */
.seo-content-section {
    margin-top: 30px;
    text-align: center;
}

.toggle-btn {
    background: #f3f4f6;
    color: #4b5563;
    border: 1px solid #e5e7eb;
    padding: 10px 25px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 14px;
    font-weight: 500;
    transition: all 0.3s;
}

.toggle-btn:hover {
    background: #e5e7eb;
    color: #1f2937;
}

.seo-content {
    display: none;
    margin-top: 25px;
    text-align: left;
    padding: 25px;
    background: #f9fafb;
    border-radius: 12px;
    border: 1px solid #e5e7eb;
}

.seo-content h2 {
    font-size: 20px;
    color: #1f2937;
    margin-bottom: 15px;
    margin-top: 20px;
}

.seo-content h2:first-child {
    margin-top: 0;
}

.seo-content h3 {
    font-size: 16px;
    color: #4f46e5;
    margin-top: 18px;
    margin-bottom: 10px;
}

.seo-content p {
    color: #4b5563;
    line-height: 1.8;
    font-size: 14px;
}

.feature-article,
.faq-article {
    margin-bottom: 30px;
}

.feature-article:last-child,
.faq-article:last-child {
    margin-bottom: 0;
}

.faq-item {
    margin-bottom: 18px;
}

.faq-item:last-child {
    margin-bottom: 0;
}

@media (max-width: 400px) {
    .container {
        padding: 30px 20px;
    }
    
    .title-section h1 {
        font-size: 30px;
    }
    
    .code {
        font-size: 26px;
        letter-spacing: 4px;
    }
    
    .btn {
        font-size: 16px;
        padding: 14px;
    }
}