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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
    background: #fff;
    color: #333;
    line-height: 1.6;
}

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

/* 导航栏 */
nav {
    border-bottom: 1px solid #e5e5e5;
    background: #fff;
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 64px;
}

.logo {
    font-size: 20px;
    font-weight: 600;
    color: #ff6b35;
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
}

.nav-links {
    display: flex;
    gap: 32px;
}

.nav-links a {
    color: #666;
    text-decoration: none;
    font-size: 15px;
    transition: color 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
    color: #ff6b35;
}

.mobile-menu-btn {
    display: none;
}

/* Hero区域 */
.hero {
    padding: 100px 0;
    text-align: center;
}

.hero h1 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 16px;
    color: #1a1a1a;
}

.hero p {
    font-size: 20px;
    color: #666;
    margin-bottom: 40px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 30px;
}

.version-badge {
    display: inline-block;
    padding: 8px 16px;
    background: #f8f8f8;
    border-radius: 20px;
    font-size: 14px;
    color: #666;
}

/* 按钮 */
.btn {
    display: inline-block;
    padding: 14px 32px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 500;
    text-decoration: none;
    transition: all 0.2s;
    border: none;
    cursor: pointer;
}

.btn-primary {
    background: #ff6b35;
    color: #fff;
}

.btn-primary:hover {
    background: #ff5722;
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: #ff6b35;
    border: 2px solid #ff6b35;
}

.btn-outline:hover {
    background: #ff6b35;
    color: #fff;
}

/* Section */
.section {
    padding: 80px 0;
}

.section-title {
    font-size: 36px;
    font-weight: 600;
    text-align: center;
    margin-bottom: 60px;
    color: #1a1a1a;
}

/* 功能卡片 */
.features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 40px;
}

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

.feature-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
    background: #f8f8f8;
    color: #ff6b35;
    font-size: 28px;
}

.feature-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 12px;
    color: #1a1a1a;
}

.feature-card p {
    font-size: 15px;
    color: #666;
}

/* 下载区域 */
.download-section {
    background: #f8f8f8;
}

.download-box {
    background: #fff;
    border-radius: 12px;
    padding: 48px;
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
    border: 1px solid #e5e5e5;
}

.download-box h3 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 8px;
}

.download-box .version-info {
    color: #999;
    font-size: 14px;
    margin-bottom: 32px;
}

.download-info {
    margin-top: 30px;
    padding-top: 30px;
    border-top: 1px solid #e5e5e5;
}

.download-info ul {
    list-style: none;
    text-align: left;
}

.download-info ul li {
    padding: 12px 0;
    color: #666;
    font-size: 15px;
}

.download-info ul li i {
    color: #ff6b35;
    margin-right: 8px;
}

/* FAQ */
.faq-item {
    border-bottom: 1px solid #e5e5e5;
    padding: 24px 0;
}

.faq-question {
    font-size: 18px;
    font-weight: 600;
    color: #1a1a1a;
    margin-bottom: 12px;
}

.faq-answer {
    font-size: 15px;
    color: #666;
    line-height: 1.8;
}

/* 文档样式 */
.docs-content {
    max-width: 900px;
    margin: 0 auto;
}

.docs-content h2 {
    font-size: 28px;
    font-weight: 600;
    margin: 40px 0 20px;
    color: #1a1a1a;
}

.docs-content h3 {
    font-size: 22px;
    font-weight: 600;
    margin: 30px 0 15px;
    color: #1a1a1a;
}

.docs-content p {
    margin-bottom: 16px;
    color: #666;
    line-height: 1.8;
}

.docs-content ul,
.docs-content ol {
    margin-bottom: 16px;
    padding-left: 30px;
    color: #666;
}

.docs-content li {
    margin-bottom: 8px;
    line-height: 1.8;
}

.feature-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    margin: 30px 0;
}

.feature-list-item {
    padding: 20px;
    background: #f8f8f8;
    border-radius: 8px;
}

.feature-list-item h4 {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 8px;
    color: #1a1a1a;
}

.feature-list-item p {
    font-size: 14px;
    color: #666;
    margin: 0;
}

/* 页脚 */
footer {
    background: #1a1a1a;
    color: #999;
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 60px;
    margin-bottom: 40px;
}

.footer-section h4 {
    color: #fff;
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 20px;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 12px;
    font-size: 14px;
}

.footer-section a {
    color: #999;
    text-decoration: none;
    transition: color 0.2s;
}

.footer-section a:hover {
    color: #fff;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid #333;
    font-size: 14px;
}

/* 响应式 */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 36px;
    }

    .hero p {
        font-size: 18px;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .hero-buttons .btn {
        width: 100%;
        max-width: 300px;
    }

    .section {
        padding: 60px 0;
    }

    .section-title {
        font-size: 28px;
        margin-bottom: 40px;
    }

    .features {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .feature-list {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .nav-links {
        display: none;
    }

    .mobile-menu-btn {
        display: block;
        background: none;
        border: none;
        font-size: 24px;
        cursor: pointer;
        color: #666;
    }

    .download-box {
        padding: 32px 24px;
    }
}

/* 版本历史样式 */
.version-card {
    background: #fff;
    border: 1px solid #e5e5e5;
    border-radius: 12px;
    padding: 40px;
    margin-bottom: 30px;
}

.version-card.current-version {
    border-color: #ff6b35;
    box-shadow: 0 4px 12px rgba(255, 107, 53, 0.1);
}

.version-card.future-version {
    background: #f8f8f8;
    border-style: dashed;
}

.version-header {
    border-bottom: 2px solid #e5e5e5;
    padding-bottom: 20px;
    margin-bottom: 30px;
}

.version-header h2 {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 8px;
}

.version-number {
    font-size: 28px;
    font-weight: 700;
    color: #1a1a1a;
}

.version-badge {
    display: inline-block;
    padding: 6px 14px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 500;
}

.version-badge.current {
    background: #ff6b35;
    color: #fff;
}

.version-badge.planned {
    background: #e5e5e5;
    color: #666;
}

.version-date {
    color: #999;
    font-size: 14px;
}

.version-content h3 {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 12px;
    color: #1a1a1a;
}

.version-content h4 {
    font-size: 18px;
    font-weight: 600;
    margin: 24px 0 12px;
    color: #1a1a1a;
}

.version-content p {
    margin-bottom: 20px;
    color: #666;
    line-height: 1.8;
}

.version-content ul {
    margin-bottom: 20px;
    padding-left: 24px;
}

.version-content li {
    margin-bottom: 10px;
    color: #666;
    line-height: 1.8;
}

.version-download {
    margin-top: 30px;
    padding-top: 30px;
    border-top: 1px solid #e5e5e5;
    display: flex;
    align-items: center;
    gap: 20px;
}

.version-size {
    color: #999;
    font-size: 14px;
}

@media (max-width: 768px) {
    .version-card {
        padding: 24px;
    }

    .version-number {
        font-size: 24px;
    }

    .version-download {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

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