/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2980b9;
    --primary-dark: #1f5f8b;
    --secondary-color: #3498db;
    --accent-color: #52c9e8;
    --text-primary: #2c3e50;
    --text-secondary: #7f8c8d;
    --bg-light: #f8f9fa;
    --bg-dark: #1a1a2e;
    --bg-card: #ffffff;
    --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-2: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-3: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.2);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', 'PingFang SC', 'Hiragino Sans GB', sans-serif;
    color: var(--text-primary);
    line-height: 1.6;
    background-color: var(--bg-light);
    overflow-x: hidden;
}

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

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-sm);
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: bold;
    color: var(--primary-color);
}

.logo-icon {
    font-size: 28px;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-menu a {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width 0.3s ease;
}

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

.nav-menu a:hover::after {
    width: 100%;
}

/* 英雄区域 */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding-top: 80px;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-1);
    z-index: -1;
}

.particles {
    position: absolute;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 20%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
    animation: float 20s infinite ease-in-out;
}

@keyframes float {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(5deg); }
}

.hero-content {
    text-align: center;
    color: white;
    z-index: 1;
    max-width: 900px;
    margin: 0 auto;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: 20px;
    line-height: 1.2;
}

.gradient-text {
    background: linear-gradient(135deg, #fff 0%, #e0e0e0 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.5rem;
    margin-bottom: 15px;
    opacity: 0.95;
}

.hero-description {
    font-size: 1.1rem;
    margin-bottom: 40px;
    opacity: 0.9;
    line-height: 1.8;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    margin-bottom: 60px;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 32px;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 16px;
}

.btn-primary {
    background: white;
    color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

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

.btn-secondary {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
    flex-wrap: wrap;
}

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

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 5px;
}

.stat-label {
    font-size: 0.9rem;
    opacity: 0.9;
}

/* 功能特性 */
.features {
    padding: 100px 0;
    background: var(--bg-light);
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.section-subtitle {
    font-size: 1.2rem;
    color: var(--text-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    margin-top: 60px;
}

.feature-card {
    background: var(--bg-card);
    padding: 40px;
    border-radius: 20px;
    box-shadow: var(--shadow-sm);
    transition: all 0.3s ease;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient-3);
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 25px;
    color: white;
}

.feature-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.feature-description {
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.8;
}

.feature-list {
    list-style: none;
    margin-top: 20px;
}

.feature-list li {
    padding: 8px 0;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* 技术特点 */
.tech {
    padding: 100px 0;
    background: var(--bg-dark);
    color: white;
}

.tech .section-title,
.tech .section-subtitle {
    color: white;
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 60px;
}

.tech-item {
    text-align: center;
    padding: 30px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 15px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: all 0.3s ease;
}

.tech-item:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-5px);
}

.tech-icon {
    font-size: 3rem;
    margin-bottom: 20px;
}

.tech-item h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
}

.tech-item p {
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.6;
}

/* 界面预览 */
.screenshots {
    padding: 100px 0;
    background: var(--bg-light);
}

.screenshot-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 40px;
    margin-top: 60px;
}

.screenshot-card {
    background: var(--bg-card);
    border-radius: 20px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all 0.3s ease;
}

.screenshot-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.screenshot-placeholder {
    width: 100%;
    height: 300px;
    background: var(--gradient-2);
    display: flex;
    align-items: center;
    justify-content: center;
}

.placeholder-content {
    text-align: center;
    color: white;
}

.placeholder-content svg {
    margin-bottom: 15px;
}

.placeholder-content p {
    font-size: 1.1rem;
    font-weight: 600;
}

.screenshot-card h3 {
    padding: 25px 30px 10px;
    font-size: 1.3rem;
    color: var(--text-primary);
}

.screenshot-card p {
    padding: 0 30px 25px;
    color: var(--text-secondary);
}

/* 版本说明 */
.versions {
    padding: 100px 0;
    background: var(--bg-light);
}

.comparison-table {
    margin-top: 40px;
    overflow-x: auto;
}

.comparison-table table {
    width: 100%;
    border-collapse: collapse;
    background: var(--bg-card);
    border-radius: 15px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.comparison-table thead {
    background: var(--gradient-1);
    color: white;
}

.comparison-table th,
.comparison-table td {
    padding: 20px;
    text-align: left;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.comparison-table th {
    font-weight: 700;
    font-size: 1.1rem;
}

.comparison-table tbody tr:hover {
    background: rgba(41, 128, 185, 0.05);
}

.comparison-table tbody tr:last-child td {
    border-bottom: none;
}

.version-tips {
    margin-top: 40px;
}

.tip-card {
    background: var(--bg-card);
    padding: 30px;
    border-radius: 15px;
    box-shadow: var(--shadow-sm);
}

.tip-card h3 {
    margin-bottom: 20px;
    color: var(--primary-color);
}

.tip-card ul {
    list-style: none;
    padding: 0;
}

.tip-card li {
    padding: 10px 0;
    padding-left: 25px;
    position: relative;
    color: var(--text-secondary);
    line-height: 1.8;
}

.tip-card li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

/* 下载区域 */
.download {
    padding: 100px 0;
    background: var(--gradient-1);
    color: white;
}

.download-content {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.download-title {
    font-size: 2.5rem;
    font-weight: 800;
    margin-bottom: 15px;
}

.download-subtitle {
    font-size: 1.2rem;
    margin-bottom: 40px;
    opacity: 0.9;
}

.download-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 40px;
    background: rgba(255, 255, 255, 0.1);
    padding: 30px;
    border-radius: 15px;
    backdrop-filter: blur(10px);
}

.info-item {
    text-align: left;
    padding: 10px;
}

.info-item strong {
    display: block;
    margin-bottom: 5px;
    opacity: 0.9;
}

.download-buttons {
    margin-bottom: 30px;
}

.btn-download {
    background: white;
    color: var(--primary-color);
    padding: 18px 40px;
    font-size: 1.1rem;
}

.btn-large {
    padding: 18px 50px;
}

.download-note {
    background: rgba(255, 255, 255, 0.1);
    padding: 20px;
    border-radius: 10px;
    backdrop-filter: blur(10px);
}

.download-note {
    margin-top: 40px;
}

.download-note p {
    margin: 0 0 15px 0;
    opacity: 0.9;
    font-weight: 600;
}

.note-list {
    list-style: none;
    padding: 0;
    text-align: left;
    margin-top: 15px;
}

.note-list li {
    padding: 8px 0;
    padding-left: 25px;
    position: relative;
    opacity: 0.9;
}

.note-list li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: white;
    font-weight: bold;
}

/* 版本选择器 */
.version-selector {
    margin-top: 40px;
}

.version-tabs {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-bottom: 30px;
}

.version-tab {
    padding: 12px 30px;
    background: rgba(255, 255, 255, 0.1);
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50px;
    color: white;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.version-tab:hover {
    background: rgba(255, 255, 255, 0.2);
}

.version-tab.active {
    background: white;
    color: var(--primary-color);
    border-color: white;
}

.version-content {
    display: none;
}

.version-content.active {
    display: block;
}

.version-category {
    margin-bottom: 40px;
}

.category-title {
    font-size: 1.5rem;
    margin-bottom: 10px;
    color: white;
}

.category-desc {
    margin-bottom: 25px;
    opacity: 0.9;
    font-size: 1rem;
}

.version-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
    margin-top: 20px;
}

.version-card {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 15px;
    padding: 25px;
    transition: all 0.3s ease;
    position: relative;
}

.version-card:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-5px);
}

.version-badge {
    display: inline-block;
    background: rgba(255, 255, 255, 0.2);
    padding: 5px 15px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 15px;
}

.version-card h4 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: white;
}

.version-info {
    display: flex;
    gap: 10px;
    margin-bottom: 15px;
    flex-wrap: wrap;
}

.info-tag {
    background: rgba(255, 255, 255, 0.2);
    padding: 4px 12px;
    border-radius: 15px;
    font-size: 0.85rem;
    font-weight: 600;
}

.info-tag.framework {
    background: rgba(255, 200, 0, 0.3);
}

.info-size {
    background: rgba(255, 255, 255, 0.2);
    padding: 4px 12px;
    border-radius: 15px;
    font-size: 0.85rem;
    font-weight: 600;
}

.version-desc {
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 20px;
    font-size: 0.95rem;
    line-height: 1.6;
}

.btn-version {
    width: 100%;
    justify-content: center;
    background: white;
    color: var(--primary-color);
}

.btn-version.btn-secondary {
    background: rgba(255, 255, 255, 0.2);
    color: white;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

.btn-version.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.3);
}

/* 系统推荐提示 */
.system-recommendation {
    background: rgba(255, 255, 255, 0.15);
    backdrop-filter: blur(10px);
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 15px;
    padding: 20px;
    margin-bottom: 30px;
    animation: slideDown 0.5s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.recommendation-content {
    display: flex;
    align-items: center;
    gap: 15px;
    position: relative;
}

.recommendation-icon {
    font-size: 2rem;
    flex-shrink: 0;
}

.recommendation-text {
    flex: 1;
    color: white;
    line-height: 1.6;
}

.recommendation-text strong {
    color: #fff;
    font-weight: 700;
}

.recommendation-close {
    background: rgba(255, 255, 255, 0.2);
    border: none;
    color: white;
    font-size: 24px;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    flex-shrink: 0;
    line-height: 1;
    padding: 0;
}

.recommendation-close:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: rotate(90deg);
}

/* 推荐版本高亮 */
.version-card.recommended {
    background: rgba(255, 0, 0, 0.2) !important;
    border: 2px solid rgba(255, 0, 0, 0.8) !important;
    box-shadow: 0 0 20px rgba(255, 0, 0, 0.5), 0 0 40px rgba(255, 0, 0, 0.3) !important;
    animation: blink 1.5s infinite;
    position: relative;
}

.version-card.recommended::before {
    content: '⭐ 推荐';
    position: absolute;
    top: -12px;
    right: 15px;
    background: rgba(255, 0, 0, 0.9);
    color: white;
    padding: 4px 12px;
    border-radius: 15px;
    font-size: 0.75rem;
    font-weight: 700;
    z-index: 10;
    box-shadow: 0 2px 8px rgba(255, 0, 0, 0.5);
}

@keyframes blink {
    0%, 100% {
        background: rgba(255, 0, 0, 0.2);
        box-shadow: 0 0 20px rgba(255, 0, 0, 0.5), 0 0 40px rgba(255, 0, 0, 0.3);
    }
    50% {
        background: rgba(255, 0, 0, 0.35);
        box-shadow: 0 0 30px rgba(255, 0, 0, 0.7), 0 0 60px rgba(255, 0, 0, 0.5);
    }
}

/* 页脚 */
.footer {
    background: var(--bg-dark);
    color: white;
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h3,
.footer-section h4 {
    margin-bottom: 20px;
    color: white;
}

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

.footer-section ul li {
    margin-bottom: 10px;
}

.footer-section a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: white;
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        gap: 15px;
        font-size: 0.9rem;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.2rem;
    }

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

    .btn {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }

    .features-grid,
    .tech-grid,
    .screenshot-grid {
        grid-template-columns: 1fr;
    }

    .hero-stats {
        gap: 30px;
    }

    .section-title {
        font-size: 2rem;
    }
    
    .version-tabs {
        flex-direction: column;
        align-items: center;
    }
    
    .version-grid {
        grid-template-columns: 1fr;
    }
    
    .comparison-table {
        font-size: 0.9rem;
    }
    
    .comparison-table th,
    .comparison-table td {
        padding: 12px 8px;
    }
    
    .version-card {
        padding: 20px;
    }
    
    .download-note {
        text-align: left;
    }
    
    .recommendation-content {
        flex-direction: column;
        text-align: center;
    }
    
    .recommendation-close {
        position: absolute;
        top: -10px;
        right: -10px;
    }
}