/* 基础重置和变量 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #667eea;
    --secondary-color: #764ba2;
    --accent-color: #f093fb;
    --text-primary: #2d3748;
    --text-secondary: #4a5568;
    --text-light: #718096;
    --bg-primary: #ffffff;
    --bg-secondary: #f7fafc;
    --bg-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --bg-accent: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --border-radius: 12px;
    --transition: all 0.3s ease;
}

body {
    font-family: 'Noto Sans SC', 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-primary);
    overflow-x: hidden;
}

/* 语言切换器 */
.language-switcher {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
    display: flex;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border-radius: 25px;
    padding: 4px;
    box-shadow: var(--shadow-md);
}

.lang-btn {
    padding: 8px 16px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
}

.lang-btn:hover {
    background: rgba(102, 126, 234, 0.1);
    color: var(--primary-color);
}

.lang-btn.active {
    background: var(--bg-gradient);
    color: white;
    box-shadow: var(--shadow-sm);
}

/* 主要内容 */
.main-content {
    min-height: 100vh;
}

/* 英雄区域 */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    background-size: 400% 400%;
    animation: gradientShift 15s ease infinite;
    position: relative;
    overflow: hidden;
}

@keyframes gradientShift {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 80%, rgba(255, 255, 255, 0.1) 0%, transparent 50%),
                radial-gradient(circle at 80% 20%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
}

.hero-content {
    flex: 1;
    max-width: 600px;
    padding: 40px;
    color: white;
    z-index: 2;
    position: relative;
}

.logo-container {
    margin-bottom: 30px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo-icon {
    font-size: 48px;
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

.logo-text {
    font-size: 2.5rem;
    font-weight: 700;
    margin: 0;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.hero-description {
    font-size: 1.2rem;
    margin-bottom: 40px;
    opacity: 0.9;
    line-height: 1.8;
}

.coming-soon {
    margin-bottom: 40px;
    text-align: center;
}

.coming-soon h2 {
    font-size: 2rem;
    margin-bottom: 20px;
    color: var(--accent-color);
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.countdown {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 30px;
}

.countdown-item {
    text-align: center;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    padding: 15px 20px;
    border-radius: var(--border-radius);
    min-width: 80px;
}

.countdown-value {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: white;
}

.countdown-label {
    font-size: 0.9rem;
    opacity: 0.8;
}

.cta-buttons {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.btn {
    padding: 12px 24px;
    border: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 140px;
}

.btn-primary {
    background: var(--bg-accent);
    color: white;
    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;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

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

/* 英雄视觉效果 */
.hero-visual {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
    z-index: 2;
    position: relative;
}

.blockchain-animation {
    display: flex;
    align-items: center;
    gap: 10px;
    animation: slideIn 2s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.block {
    width: 60px;
    height: 60px;
    background: rgba(255, 255, 255, 0.1);
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 8px;
    position: relative;
    animation: pulse 2s ease-in-out infinite;
}

.block:nth-child(1) { animation-delay: 0s; }
.block:nth-child(2) { animation-delay: 0.2s; }
.block:nth-child(3) { animation-delay: 0.4s; }
.block:nth-child(4) { animation-delay: 0.6s; }
.block:nth-child(5) { animation-delay: 0.8s; }

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 0.7;
    }
    50% {
        transform: scale(1.05);
        opacity: 1;
    }
}

.block::after {
    content: '';
    position: absolute;
    top: 50%;
    right: -15px;
    width: 20px;
    height: 2px;
    background: rgba(255, 255, 255, 0.5);
    transform: translateY(-50%);
}

.block:last-child::after {
    display: none;
}

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

/* 特性区域 */
.features {
    padding: 80px 0;
    background: var(--bg-secondary);
}

.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 50px;
    color: var(--text-primary);
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--bg-gradient);
    border-radius: 2px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 60px;
}

.feature-card {
    background: white;
    padding: 40px 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    text-align: center;
    transition: var(--transition);
    border: 1px solid rgba(0, 0, 0, 0.05);
}

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

.feature-icon {
    font-size: 3rem;
    margin-bottom: 20px;
    display: block;
}

.feature-card h3 {
    font-size: 1.5rem;
    margin-bottom: 15px;
    color: var(--text-primary);
}

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

/* 订阅区域 */
.subscribe {
    padding: 80px 0;
    background: var(--bg-gradient);
    color: white;
    text-align: center;
}

.subscribe h2 {
    font-size: 2.2rem;
    margin-bottom: 20px;
}

.subscribe p {
    font-size: 1.1rem;
    margin-bottom: 40px;
    opacity: 0.9;
}

.subscribe-form {
    display: flex;
    max-width: 500px;
    margin: 0 auto;
    gap: 10px;
}

.subscribe-form input {
    flex: 1;
    padding: 15px 20px;
    border: none;
    border-radius: var(--border-radius);
    font-size: 1rem;
    background: rgba(255, 255, 255, 0.9);
    color: var(--text-primary);
}

.subscribe-form input::placeholder {
    color: var(--text-light);
}

.subscribe-form button {
    padding: 15px 25px;
    border: none;
    border-radius: var(--border-radius);
    background: var(--bg-accent);
    color: white;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.subscribe-form button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* 页脚 */
.footer {
    background: var(--text-primary);
    color: white;
    padding: 40px 0 20px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.2rem;
    font-weight: 600;
}

.footer-logo .logo-icon {
    font-size: 1.5rem;
}

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

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: var(--transition);
}

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

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero {
        flex-direction: column;
        text-align: center;
        padding: 80px 20px 40px;
    }
    
    .hero-content {
        padding: 20px;
    }
    
    .hero-visual {
        padding: 20px;
    }
    
    .blockchain-animation {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .logo-text {
        font-size: 2rem;
    }
    
    .hero-description {
        font-size: 1.1rem;
    }
    
    .countdown {
        flex-wrap: wrap;
        gap: 10px;
    }
    
    .countdown-item {
        min-width: 60px;
        padding: 10px 15px;
    }
    
    .countdown-value {
        font-size: 1.5rem;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 300px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .subscribe-form {
        flex-direction: column;
        max-width: 350px;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
    
    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: 20px;
    }
    
    .language-switcher {
        position: relative;
        top: 0;
        right: 0;
        justify-content: center;
        margin: 20px;
    }
}

@media (max-width: 480px) {
    .logo-text {
        font-size: 1.8rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .coming-soon h2 {
        font-size: 1.8rem;
    }
    
    .feature-card {
        padding: 30px 20px;
    }
    
    .subscribe h2 {
        font-size: 1.8rem;
    }
}