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

:root {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --secondary-color: #8b5cf6;
    --accent-color: #06b6d4;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --bg-primary: #ffffff;
    --bg-secondary: #f9fafb;
    --bg-dark: #111827;
    --border-color: #e5e7eb;
    --gradient-primary: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #06b6d4 100%);
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    color: var(--text-primary);
    line-height: 1.6;
    background: var(--bg-primary);
}

.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);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    padding: 15px 0;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

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

.logo-text {
    font-size: 24px;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    gap: 30px;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    transition: color 0.3s ease;
}

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

.nav-links a.active {
    color: var(--primary-color);
    font-weight: 600;
}

.nav-cta {
    padding: 10px 24px;
    font-size: 14px;
}

/* CTA 按钮 */
.cta-button {
    background: var(--gradient-primary);
    color: white;
    border: none;
    padding: 14px 32px;
    border-radius: 12px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
}

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

.cta-button.primary {
    background: var(--gradient-primary);
}

.cta-button.secondary {
    background: transparent;
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.cta-button.secondary:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.arrow {
    transition: transform 0.3s ease;
}

.cta-button:hover .arrow {
    transform: translateX(4px);
}

/* Hero 区域 */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 0 80px;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: 
        radial-gradient(ellipse at 20% 20%, rgba(99, 102, 241, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 80%, rgba(6, 182, 212, 0.1) 0%, transparent 50%);
    z-index: -1;
}

.hero-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: 64px;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 20px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 20px;
    color: var(--text-secondary);
    margin-bottom: 40px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-bottom: 60px;
}

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

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

.stat-number {
    display: block;
    font-size: 36px;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 14px;
    margin-top: 5px;
}

/* 通用 Section 样式 */
.features,
.showcase,
.download,
.why-us,
.faq {
    padding: 100px 0;
}

.section-title {
    text-align: center;
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 15px;
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    font-size: 18px;
    margin-bottom: 60px;
}

/* 功能特性区域 */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.feature-card {
    background: var(--bg-secondary);
    border-radius: 20px;
    padding: 40px 30px;
    transition: all 0.3s ease;
    border: 1px solid transparent;
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: rgba(99, 102, 241, 0.2);
    background: white;
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 12px;
}

.feature-card p {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* 展示区域 */
.showcase-wrapper {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
}

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

.showcase-image {
    margin-bottom: 25px;
}

.mockup-window {
    background: var(--bg-dark);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.mockup-header {
    background: rgba(255, 255, 255, 0.1);
    padding: 12px 16px;
    display: flex;
    gap: 8px;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.dot.red { background: #ff5f57; }
.dot.yellow { background: #febc2e; }
.dot.green { background: #28c840; }

.mockup-content {
    padding: 30px;
    min-height: 250px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.mockup-status {
    text-align: center;
}

.mockup-status .status-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: linear-gradient(135deg, #22c55e 0%, #16a34a 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 36px;
    color: white;
}

.mockup-status .status-text {
    font-size: 24px;
    font-weight: 700;
    color: #22c55e;
}

.mockup-info {
    width: 100%;
    text-align: left;
}

.info-row {
    display: flex;
    justify-content: space-between;
    padding: 15px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    color: #d1d5db;
}

.info-row .highlight {
    color: #22c55e;
    font-weight: 600;
}

.server-list {
    width: 100%;
}

.server-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 15px;
    border-radius: 10px;
    margin-bottom: 8px;
    transition: all 0.3s ease;
    color: #d1d5db;
}

.server-item:hover,
.server-item.selected {
    background: rgba(99, 102, 241, 0.2);
}

.server-item.selected {
    background: rgba(99, 102, 241, 0.3);
}

.server-item .flag {
    font-size: 24px;
}

.server-item .name {
    flex: 1;
}

.server-item .ping {
    color: #22c55e;
    font-size: 14px;
}

.settings {
    width: 100%;
}

.setting-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    color: #d1d5db;
}

.toggle {
    width: 48px;
    height: 26px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 13px;
    position: relative;
    cursor: pointer;
    transition: background 0.3s ease;
}

.toggle.active {
    background: var(--primary-color);
}

.toggle::after {
    content: '';
    position: absolute;
    width: 22px;
    height: 22px;
    background: white;
    border-radius: 50%;
    top: 2px;
    left: 2px;
    transition: transform 0.3s ease;
}

.toggle.active::after {
    transform: translateX(22px);
}

.showcase-item h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 8px;
}

.showcase-item p {
    color: var(--text-secondary);
}

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

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

.download-card {
    background: white;
    border-radius: 20px;
    padding: 40px 30px;
    text-align: center;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.download-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-xl);
    transform: translateY(-4px);
}

.download-icon {
    font-size: 56px;
    margin-bottom: 20px;
}

.download-card h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 8px;
}

.download-card .version {
    color: var(--text-secondary);
    font-size: 14px;
    margin-bottom: 5px;
}

.download-card .requirement {
    color: var(--text-secondary);
    font-size: 13px;
    margin-bottom: 25px;
}

.download-btn {
    background: var(--gradient-primary);
    color: white;
    border: none;
    padding: 12px 32px;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    width: 100%;
    justify-content: center;
    text-decoration: none;
}

.download-btn:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

/* 为什么选择我们 */
.why-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.why-item {
    text-align: center;
    padding: 30px;
}

.why-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.why-item h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 12px;
}

.why-item p {
    color: var(--text-secondary);
}

/* 常见问题 */
.faq-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.faq-item {
    background: var(--bg-secondary);
    padding: 30px;
    border-radius: 16px;
}

.faq-item h3 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.faq-item p {
    color: var(--text-secondary);
    line-height: 1.7;
}

/* 页脚 */
.footer {
    background: var(--bg-dark);
    color: #d1d5db;
    padding: 80px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: 60px;
    margin-bottom: 60px;
}

.footer-brand .logo-text {
    color: white;
    -webkit-text-fill-color: white;
}

.footer-brand p {
    color: #9ca3af;
    margin-top: 20px;
    line-height: 1.8;
}

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

.footer-column h4 {
    color: white;
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 20px;
}

.footer-column a {
    display: block;
    color: #9ca3af;
    text-decoration: none;
    margin-bottom: 12px;
    transition: color 0.3s ease;
}

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

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 30px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.social-links {
    display: flex;
    gap: 20px;
}

.social-links a {
    color: #9ca3af;
    text-decoration: none;
    transition: color 0.3s ease;
}

.social-links a:hover {
    color: white;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .navbar .container {
        flex-wrap: wrap;
        gap: 10px;
    }
    
    .nav-links {
        order: 3;
        width: 100%;
        justify-content: center;
        gap: 20px;
    }
    
    .nav-cta {
        display: none;
    }
    
    .hero-title {
        font-size: 40px;
    }
    
    .hero-subtitle {
        font-size: 16px;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 30px;
    }
    
    .features-grid,
    .showcase-wrapper,
    .download-grid,
    .why-grid,
    .faq-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-links {
        grid-template-columns: 1fr 1fr;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .nav-links {
        display: none;
    }
    
    .section-title {
        font-size: 32px;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
    }
}

/* 平滑滚动 */
html {
    scroll-behavior: smooth;
}