:root {
    --primary: #4f46e5;
    --primary-dark: #4338ca;
    --primary-light: #818cf8;
    --secondary: #1e293b;
    --accent: #06b6d4;
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    --text: #334155;
    --text-light: #64748b;
    --text-muted: #9ca3af;
    --background: #f8fafc;
    --white: #ffffff;
    --border: #e2e8f0;
    --border-light: #f1f5f9;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    color: var(--text);
    background-color: var(--background);
    line-height: 1.6;
    font-size: 15px;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* 导航栏样式 */
.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border);
}

.navbar {
    display: flex;
    align-items: center;
    padding: 0.75rem 0;
    min-height: 60px;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    flex-shrink: 0;
    margin-right: 2rem;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0;
    letter-spacing: -0.5px;
    color: var(--secondary);
}

.logo-highlight {
    color: var(--primary);
    font-weight: 800;
}

.nav-links {
    display: flex;
    gap: 1.5rem;
    align-items: center;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-link {
    color: var(--text);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.2s;
    white-space: nowrap;
}

.nav-link:hover {
    color: var(--primary);
}

.primary-btn {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: var(--white);
    border: none;
    padding: 0.5rem 1.25rem;
    border-radius: 0.375rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    font-size: 0.9rem;
}

.primary-btn:hover {
    background: linear-gradient(135deg, var(--primary-dark), var(--primary-dark));
    color: var(--white);
    text-decoration: none;
}

.navbar .download-btn {
    margin-left: auto;
    width: auto;
    margin-bottom: 0;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
}

.menu-toggle span {
    width: 22px;
    height: 2px;
    background-color: var(--text);
    border-radius: 2px;
}

/* Hero 区域样式 */
.hero {
    padding: 2.5rem 0;
    position: relative;
    overflow: hidden;
}

.gradient-bg {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--white);
}

/* Hero区域内的按钮特殊样式 */
.hero .primary-btn {
    background: linear-gradient(135deg, #ff6b35, #f7931e);
    color: var(--white);
    border: none;
    box-shadow: 0 4px 15px rgba(255, 107, 53, 0.3);
}

.hero .primary-btn:hover {
    background: linear-gradient(135deg, #e85a2b, #e8851a);
    box-shadow: 0 6px 20px rgba(255, 107, 53, 0.4);
    transform: translateY(-1px);
}

.hero .container {
    display: flex;
    align-items: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.hero-content {
    flex: 1;
    min-width: 300px;
}

.hero h1 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: var(--white);
    font-weight: 700;
    line-height: 1.2;
}

.hero-description {
    font-size: 1rem;
    margin-bottom: 1.5rem;
    color: rgba(255, 255, 255, 0.9);
    max-width: 560px;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
    margin-bottom: 2rem;
}

.hero-stats {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.hero-stats .stat-item {
    text-align: center;
}

.hero-stats .stat-number {
    display: block;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--white);
}

.hero-stats .stat-label {
    display: block;
    font-size: 0.85rem;
    color: rgba(255, 255, 255, 0.8);
}

.hero-image {
    flex: 1;
    min-width: 300px;
    display: flex;
    justify-content: center;
}

.screenshot {
    max-width: 100%;
    height: auto;
    border-radius: 0.5rem;
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.btn {
    padding: 0.5rem 1.25rem;
    border-radius: 0.375rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    text-decoration: none;
    font-size: 0.9rem;
    border: 1px solid transparent;
}

.btn-white {
    background-color: var(--white);
    color: var(--primary);
    border: 1px solid var(--white);
}

.btn-white:hover {
    background-color: rgba(255, 255, 255, 0.9);
    color: var(--primary-dark);
    text-decoration: none;
}

.btn-icon {
    margin-right: 0.5rem;
    font-size: 0.9em;
}

/* 通用section样式 */
.section {
    padding: 2.5rem 0;
}

.section-title {
    font-size: 2rem;
    margin-bottom: 0.75rem;
    color: var(--secondary);
    font-weight: 600;
    text-align: center;
}

.section-description {
    font-size: 1rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto 2rem;
    text-align: center;
}

/* 问题解决区域 */
.problem-solver {
    background-color: var(--white);
}

.problems-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.25rem;
    margin-top: 1.5rem;
}

.problem-card {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    padding: 1.5rem;
    text-align: center;
}

.problem-icon {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    font-size: 1.25rem;
}

.problem-icon.error {
    background: rgba(239, 68, 68, 0.1);
    color: var(--error);
}

.problem-icon.warning {
    background: rgba(245, 158, 11, 0.1);
    color: var(--warning);
}

.problem-icon.info {
    background: rgba(6, 182, 212, 0.1);
    color: var(--accent);
}

.problem-icon.success {
    background: rgba(16, 185, 129, 0.1);
    color: var(--success);
}

.problem-card h3 {
    margin-bottom: 0.75rem;
    font-size: 1.1rem;
    color: var(--secondary);
}

.problem-card p {
    color: var(--text-light);
    font-size: 0.9rem;
    line-height: 1.5;
}

/* 特性区域 */
.features {
    background-color: var(--background);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.25rem;
    margin-top: 1.5rem;
}

.feature-card {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    padding: 1.5rem;
}

.feature-icon {
    width: 45px;
    height: 45px;
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    margin-bottom: 1rem;
    font-size: 1.1rem;
    color: var(--white);
}

.feature-card h3 {
    margin-bottom: 0.75rem;
    font-size: 1.1rem;
    color: var(--secondary);
}

.feature-card p {
    color: var(--text-light);
    font-size: 0.9rem;
    line-height: 1.5;
}

/* 按钮样式 */
.btn-outline {
    background: transparent;
    border: 1px solid var(--primary);
    color: var(--primary);
}

.btn-outline:hover {
    background: var(--primary);
    color: var(--white);
    text-decoration: none;
}

/* 下载区域 */
.download {
    background-color: var(--background);
}

.download-container {
    max-width: 800px;
    margin: 0 auto;
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    display: flex;
    flex-wrap: wrap;
    overflow: hidden;
}

.download-left {
    flex: 1;
    padding: 2rem;
    min-width: 300px;
}

.download-right {
    flex: 1;
    padding: 2rem;
    min-width: 300px;
    background: rgba(79, 70, 229, 0.02);
    border-left: 1px solid var(--border);
}

.download-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.download-badge {
    display: inline-flex;
    align-items: center;
    padding: 0.4rem 0.8rem;
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    color: white;
    border-radius: 1rem;
    font-weight: 500;
    font-size: 0.85rem;
}

.download-badge i {
    margin-right: 0.4rem;
}

.download-version {
    font-size: 0.85rem;
    color: var(--text-light);
}

.download-version i {
    color: var(--primary);
    margin-right: 0.35rem;
}

.download-left h3 {
    margin-bottom: 0.75rem;
    color: var(--secondary);
    font-size: 1.25rem;
}

.download-left p {
    margin-bottom: 1.25rem;
    color: var(--text);
    font-size: 0.95rem;
}

.download-features {
    list-style: none;
}

.download-features li {
    display: flex;
    align-items: center;
    margin-bottom: 0.6rem;
    font-size: 0.9rem;
}

.download-features li i {
    color: var(--success);
    margin-right: 0.75rem;
    width: 16px;
}

.download-btn {
    width: 100%;
    text-align: center;
    margin-bottom: 1.5rem;
    padding: 0.75rem 1.5rem;
}

.download-info-box {
    margin-top: 1rem;
}

.download-info-item {
    margin-bottom: 1.25rem;
}

.download-info-item h4 {
    font-size: 0.95rem;
    display: flex;
    align-items: center;
    margin-bottom: 0.5rem;
    color: var(--secondary);
}

.download-info-item h4 i {
    color: var(--primary);
    margin-right: 0.5rem;
}

.download-info-item ul {
    list-style: none;
    margin: 0.5rem 0 0 1.25rem;
}

.download-info-item ul li {
    font-size: 0.8rem;
    margin-bottom: 0.3rem;
    position: relative;
    color: var(--text);
}

.download-info-item ul li:before {
    content: "•";
    position: absolute;
    left: -0.75rem;
    color: var(--primary-light);
}

.download-info-item p {
    font-size: 0.8rem;
    margin: 0.5rem 0 0 0;
    line-height: 1.4;
}

/* 使用教程 */
.guide {
    background-color: var(--white);
}

.guides-container {
    max-width: 700px;
    margin: 0 auto 2rem;
}

.guide-step {
    display: flex;
    margin-bottom: 1.5rem;
    align-items: flex-start;
    position: relative;
}

.guide-step:not(:last-child)::after {
    content: '';
    position: absolute;
    top: 35px;
    left: 17px;
    height: calc(100% + 0.5rem);
    width: 1px;
    background: var(--border);
}

.guide-step-number {
    flex-shrink: 0;
    width: 35px;
    height: 35px;
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    color: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    font-weight: 600;
    margin-right: 1rem;
    z-index: 1;
}

.guide-step-content {
    flex: 1;
    background: var(--background);
    padding: 1rem;
    border-radius: 0.5rem;
    border: 1px solid var(--border);
}

.guide-step-content h3 {
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
    color: var(--secondary);
}

.guide-step-content p {
    font-size: 0.9rem;
    color: var(--text);
    line-height: 1.5;
    margin: 0;
}

.advanced-options {
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
}

.advanced-options h3 {
    text-align: center;
    margin-bottom: 1.5rem;
    color: var(--secondary);
}

.options-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
}

.option-item {
    background: var(--background);
    padding: 1rem;
    border-radius: 0.5rem;
    border: 1px solid var(--border);
    text-align: center;
}

.option-item h4 {
    font-size: 0.95rem;
    margin-bottom: 0.5rem;
    color: var(--secondary);
    display: flex;
    align-items: center;
    justify-content: center;
}

.option-item h4 i {
    color: var(--primary);
    margin-right: 0.5rem;
}

.option-item p {
    font-size: 0.8rem;
    color: var(--text-light);
    line-height: 1.4;
    margin: 0;
}

/* FAQ区域 */
.faq {
    background-color: var(--background);
}

.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.faq-card {
    background: var(--white);
    padding: 1.5rem;
    border-radius: 0.5rem;
    border: 1px solid var(--border);
    transition: all 0.2s;
    cursor: pointer;
}

.faq-card:hover {
    border-color: var(--primary);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.faq-card h3 {
    color: var(--primary);
    margin-bottom: 0.75rem;
    font-size: 1rem;
    font-weight: 600;
}

.faq-card p {
    color: var(--text-secondary);
    line-height: 1.6;
    margin: 0;
}

/* 系统兼容性 */
.compatibility {
    background-color: var(--background);
}

.specs-container {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1.25rem;
    margin-top: 1.5rem;
}

.specs-card {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: 0.5rem;
    overflow: hidden;
}

.specs-header {
    display: flex;
    align-items: center;
    padding: 1rem;
    background: rgba(79, 70, 229, 0.05);
    border-bottom: 1px solid var(--border);
}

.specs-header i {
    font-size: 1.25rem;
    color: var(--primary);
    margin-right: 0.75rem;
}

.specs-header h3 {
    font-size: 1rem;
    color: var(--secondary);
    margin: 0;
}

.specs-list {
    list-style: none;
    padding: 1rem;
    margin: 0;
}

.specs-list li {
    margin-bottom: 0.6rem;
    font-size: 0.85rem;
    color: var(--text);
    line-height: 1.4;
}

.specs-list li:last-child {
    margin-bottom: 0;
}

.specs-list strong {
    color: var(--secondary);
    font-weight: 600;
}

/* 页脚样式 */
.footer {
    background-color: var(--secondary);
    color: var(--white);
    padding: 2.5rem 0 1.5rem;
}

.footer-content {
    display: flex;
    flex-wrap: wrap;
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-logo {
    flex: 1;
    min-width: 200px;
}

.footer-logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    margin: 0 0 0.5rem;
    color: var(--white);
}

.footer-logo-highlight {
    color: var(--primary-light);
    font-weight: 800;
}

.footer-logo p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
    margin: 0;
}

.footer-links {
    flex: 2;
    display: flex;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.footer-links-column {
    flex: 1;
    min-width: 120px;
}

.footer-links-column h4 {
    color: var(--white);
    margin-bottom: 0.75rem;
    font-size: 0.95rem;
}

.footer-links-column ul {
    list-style: none;
}

.footer-links-column ul li {
    margin-bottom: 0.5rem;
}

.footer-links-column ul li a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color 0.2s;
    font-size: 0.85rem;
}

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

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    margin: 0;
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.7);
}

.footer-social {
    display: flex;
    gap: 0.5rem;
}

.social-link {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    color: var(--white);
    transition: background-color 0.2s;
    text-decoration: none;
}

.social-link:hover {
    background-color: var(--primary);
    color: var(--white);
}

/* 工具类 */
.text-center {
    text-align: center;
}

.text-muted {
    color: var(--text-muted) !important;
}

.text-warning {
    color: var(--warning) !important;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--white);
        flex-direction: column;
        padding: 0.75rem;
        border-bottom: 1px solid var(--border);
        gap: 0.75rem;
    }
    
    .nav-links.active {
        display: flex;
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .download-btn {
        display: none;
    }
    
    .hero .container {
        flex-direction: column;
    }
    
    .hero-content, .hero-image {
        width: 100%;
        text-align: center;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .hero-image {
        justify-content: center;
        margin-top: 1.5rem;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .product-showcase-grid {
        flex-direction: column;
    }
    
    .product-showcase-grid.reverse {
        flex-direction: column;
    }
    
    .guide-step {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    
    .guide-step-number {
        margin-right: 0;
        margin-bottom: 0.75rem;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 1.5rem;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 0.75rem;
    }

    .problem-cards {
        grid-template-columns: 1fr;
    }

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

    /* 错误代码区域移动端样式 */
    .error-item {
        flex-direction: column;
        gap: 0.75rem;
    }

    .error-code {
        align-self: flex-start;
        min-width: auto;
    }

    .error-search-tip {
        flex-direction: column;
        text-align: center;
        gap: 0.75rem;
    }

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

    .tutorial-steps {
        grid-template-columns: 1fr;
    }

    .step {
        text-align: center;
    }

    .step-number {
        margin: 0 auto 1rem;
    }
}

@media (max-width: 992px) {
    .specs-container {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 576px) {
    .problems-grid,
    .features-grid,
    .specs-container {
        grid-template-columns: 1fr;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 1rem;
    }
    
    .options-grid {
        grid-template-columns: 1fr;
    }
}

/* 错误代码库样式 */
.error-codes {
    background: var(--background);
}

.error-categories {
    display: grid;
    gap: 2rem;
    margin-bottom: 2rem;
}

.error-category {
    background: var(--white);
    border-radius: 0.75rem;
    padding: 1.5rem;
    border: 1px solid var(--border);
}

.category-title {
    color: var(--primary);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--primary);
    display: inline-block;
}

.error-list {
    display: grid;
    gap: 1rem;
}

.error-item {
    display: flex;
    gap: 1rem;
    padding: 1rem;
    background: rgba(79, 70, 229, 0.02);
    border-radius: 0.5rem;
    border-left: 4px solid var(--primary);
    transition: all 0.2s;
}

.error-item:hover {
    background: rgba(79, 70, 229, 0.05);
    transform: translateX(2px);
}

.error-code {
    background: var(--primary);
    color: var(--white);
    padding: 0.5rem 0.75rem;
    border-radius: 0.375rem;
    font-family: 'Courier New', monospace;
    font-weight: bold;
    font-size: 0.9rem;
    min-width: 120px;
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    height: fit-content;
    flex-shrink: 0;
}

.error-info {
    flex: 1;
}

.error-info h4 {
    color: var(--text-primary);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.error-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.5;
    margin-bottom: 0.75rem;
}

.error-solution {
    background: rgba(34, 197, 94, 0.1);
    padding: 0.75rem;
    border-radius: 0.375rem;
    border-left: 3px solid #22c55e;
}

.solution-label {
    color: #16a34a;
    font-weight: 600;
    font-size: 0.9rem;
}

.error-solution span:last-child {
    color: var(--text-primary);
    font-size: 0.9rem;
    line-height: 1.4;
}

.error-search-tip {
    background: linear-gradient(135deg, #fef3c7, #fde68a);
    border: 1px solid #f59e0b;
    border-radius: 0.75rem;
    padding: 1.5rem;
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.tip-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.tip-content h4 {
    color: #92400e;
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
}

.tip-content p {
    color: #78350f;
    font-size: 0.9rem;
    line-height: 1.5;
    margin: 0;
}