/* 重置样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 基础样式 */
body {
    font-family: 'Noto Sans SC', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

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

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
    white-space: nowrap;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.3);
}

.btn-secondary {
    background: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    color: white;
}

.btn-secondary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(240, 147, 251, 0.3);
}

.btn-outline {
    background: transparent;
    color: #667eea;
    border: 2px solid #667eea;
}

.btn-outline:hover {
    background: #667eea;
    color: white;
}

.btn-large {
    padding: 16px 32px;
    font-size: 16px;
}

.icon {
    font-size: 18px;
}

/* 头部导航 */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: all 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-img {
    width: 40px;
    height: 40px;
}

.logo-text {
    font-size: 20px;
    font-weight: 700;
    color: #333;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 32px;
}

.nav-link {
    text-decoration: none;
    color: #666;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: #667eea;
}

.nav-actions {
    display: flex;
    gap: 12px;
}

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

.mobile-menu-toggle span {
    width: 25px;
    height: 3px;
    background: #333;
    transition: all 0.3s ease;
}

/* Banner区域 */
.banner {
    padding: 120px 0 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    overflow: hidden;
    position: relative;
}

.banner::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grain" width="100" height="100" patternUnits="userSpaceOnUse"><circle cx="25" cy="25" r="1" fill="white" opacity="0.1"/><circle cx="75" cy="75" r="1" fill="white" opacity="0.1"/><circle cx="50" cy="10" r="0.5" fill="white" opacity="0.1"/><circle cx="10" cy="60" r="0.5" fill="white" opacity="0.1"/><circle cx="90" cy="40" r="0.5" fill="white" opacity="0.1"/></pattern></defs><rect width="100" height="100" fill="url(%23grain)"/></svg>');
    opacity: 0.3;
}

.banner-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.banner-title {
    font-size: 48px;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 24px;
}

.highlight {
    background: linear-gradient(45deg, #f093fb, #f5576c);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.banner-description {
    font-size: 18px;
    line-height: 1.6;
    margin-bottom: 40px;
    opacity: 0.9;
}

.banner-actions {
    display: flex;
    gap: 20px;
    margin-bottom: 60px;
}

.banner-stats {
    display: flex;
    gap: 40px;
}

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

.stat-number {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 14px;
    opacity: 0.8;
}

.banner-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.trading-interface {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 30px;
    border: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

.chart-placeholder {
    width: 300px;
    height: 150px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 10px;
    margin-bottom: 20px;
    position: relative;
    overflow: hidden;
}

.chart-line {
    position: absolute;
    height: 2px;
    background: linear-gradient(90deg, #f093fb, #f5576c);
    border-radius: 1px;
    animation: chartMove 3s ease-in-out infinite;
}

.chart-line:nth-child(1) {
    top: 30%;
    width: 60%;
    animation-delay: 0s;
}

.chart-line:nth-child(2) {
    top: 50%;
    width: 80%;
    animation-delay: 1s;
}

.chart-line:nth-child(3) {
    top: 70%;
    width: 70%;
    animation-delay: 2s;
}

@keyframes chartMove {
    0%, 100% { transform: translateX(-100%); }
    50% { transform: translateX(100%); }
}

.price-display {
    display: flex;
    flex-direction: column;
    gap: 15px;
}

.price-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
}

.coin {
    font-weight: 600;
    font-size: 16px;
}

.price {
    font-weight: 700;
    font-size: 18px;
}

.change {
    font-weight: 600;
    font-size: 14px;
}

.change.positive {
    color: #4ade80;
}

.change.negative {
    color: #f87171;
}

/* 功能区域 */
.features {
    padding: 80px 0;
    background: white;
}

.section-title {
    text-align: center;
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 60px;
    color: #333;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 40px;
}

.feature-card {
    text-align: center;
    padding: 40px 30px;
    border-radius: 16px;
    background: white;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: 24px;
}

.feature-card h3 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 16px;
    color: #333;
}

.feature-card p {
    color: #666;
    line-height: 1.6;
}

/* 市场行情区域 */
.markets {
    padding: 80px 0;
    background: #f8f9fa;
}

.markets-table {
    background: white;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.market-header {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 20px;
    padding: 20px 30px;
    background: #f8f9fa;
    font-weight: 600;
    color: #666;
}

.market-row {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 20px;
    padding: 20px 30px;
    border-bottom: 1px solid #f0f0f0;
    transition: background-color 0.3s ease;
}

.market-row:hover {
    background-color: #f8f9fa;
}

.market-row:last-child {
    border-bottom: none;
}

.market-col {
    display: flex;
    align-items: center;
}

.coin-symbol {
    font-weight: 600;
    color: #333;
}

/* 关于我们区域 */
.about {
    padding: 80px 0;
    background: white;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text p {
    font-size: 16px;
    line-height: 1.8;
    color: #666;
    margin-bottom: 24px;
}

.about-features {
    margin-top: 40px;
}

.about-feature {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.feature-check {
    color: #4ade80;
    font-weight: 600;
    font-size: 18px;
}

.about-image {
    display: flex;
    justify-content: center;
    align-items: center;
}

.image-placeholder {
    position: relative;
    width: 100%;
    height: 400px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
}

.floating-card {
    background: white;
    border-radius: 16px;
    padding: 30px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    max-width: 300px;
}

.card-header {
    font-size: 24px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 24px;
    color: #333;
}

.metric {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    padding-bottom: 16px;
    border-bottom: 1px solid #f0f0f0;
}

.metric:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.metric-label {
    color: #666;
    font-size: 14px;
}

.metric-value {
    font-weight: 700;
    color: #333;
    font-size: 18px;
}

/* 欧意app下载专区 */
.app-download {
    padding: 80px 0;
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
}

.download-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.download-description {
    font-size: 16px;
    line-height: 1.8;
    color: #666;
    margin-bottom: 30px;
}

.download-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 40px;
}

.download-feature {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.download-feature .feature-icon {
    font-size: 20px;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: 6px;
    color: white;
}

.download-actions {
    display: flex;
    align-items: center;
    gap: 30px;
}

.download-qr {
    text-align: center;
}

.qr-code {
    width: 120px;
    height: 120px;
    background: white;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    margin-bottom: 12px;
}

.qr-placeholder {
    width: 80px;
    height: 80px;
    background: #333;
    border-radius: 8px;
    position: relative;
    overflow: hidden;
}

.qr-pattern {
    position: absolute;
    background: white;
    border-radius: 2px;
}

.qr-pattern:nth-child(1) {
    top: 10px;
    left: 10px;
    width: 20px;
    height: 20px;
}

.qr-pattern:nth-child(2) {
    top: 10px;
    right: 10px;
    width: 20px;
    height: 20px;
}

.qr-pattern:nth-child(3) {
    bottom: 10px;
    left: 10px;
    width: 20px;
    height: 20px;
}

.qr-pattern:nth-child(4) {
    bottom: 10px;
    right: 10px;
    width: 20px;
    height: 20px;
}

.phone-mockup {
    width: 300px;
    height: 600px;
    background: #333;
    border-radius: 30px;
    padding: 20px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
    position: relative;
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #667eea, #764ba2);
    border-radius: 20px;
    padding: 20px;
    position: relative;
    overflow: hidden;
}

.app-interface {
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 16px;
    padding: 20px;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.app-logo {
    font-size: 20px;
    font-weight: 700;
    color: white;
}

.app-status {
    font-size: 12px;
    color: #4ade80;
    background: rgba(74, 222, 128, 0.2);
    padding: 4px 8px;
    border-radius: 12px;
}

.price-ticker {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 30px;
}

.ticker-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 12px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
}

.ticker-item .coin {
    font-weight: 600;
    color: white;
}

.ticker-item .price {
    font-weight: 700;
    color: white;
}

.ticker-item .change.positive {
    color: #4ade80;
}

.trading-buttons {
    display: flex;
    gap: 12px;
    margin-top: auto;
}

.trade-btn {
    flex: 1;
    padding: 16px;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.trade-btn.buy {
    background: #4ade80;
    color: white;
}

.trade-btn.sell {
    background: #f87171;
    color: white;
}

.trade-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

/* 服务介绍区域 */
.services {
    padding: 80px 0;
    background: white;
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.service-card {
    background: white;
    border-radius: 16px;
    padding: 30px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    border: 1px solid #f0f0f0;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15);
}

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

.service-card h3 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 16px;
    color: #333;
}

.service-card p {
    color: #666;
    line-height: 1.6;
    margin-bottom: 20px;
}

.service-features {
    list-style: none;
    padding: 0;
}

.service-features li {
    padding: 8px 0;
    color: #666;
    position: relative;
    padding-left: 20px;
}

.service-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: #4ade80;
    font-weight: 600;
}

/* 常见问题区域 */
.faq {
    padding: 80px 0;
    background: #f8f9fa;
}

.faq-content {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: white;
    border-radius: 12px;
    margin-bottom: 16px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.faq-question:hover {
    background-color: #f8f9fa;
}

.faq-question h3 {
    margin: 0;
    font-size: 18px;
    font-weight: 600;
    color: #333;
}

.faq-toggle {
    font-size: 24px;
    font-weight: 300;
    color: #667eea;
    transition: transform 0.3s ease;
}

.faq-item.active .faq-toggle {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 24px;
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease;
}

.faq-item.active .faq-answer {
    padding: 0 24px 24px;
    max-height: 200px;
}

.faq-answer p {
    color: #666;
    line-height: 1.6;
    margin: 0;
}

/* 联系我们区域 */
.contact {
    padding: 80px 0;
    background: #f8f9fa;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 30px;
    background: white;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.contact-icon {
    font-size: 32px;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
    color: white;
}

.contact-details h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 8px;
    color: #333;
}

.contact-details p {
    color: #666;
}

.contact-form {
    background: white;
    padding: 40px;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.form-group {
    margin-bottom: 24px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 16px;
    border: 2px solid #f0f0f0;
    border-radius: 8px;
    font-size: 16px;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #667eea;
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

/* 移动端底部菜单栏 */
.mobile-bottom-nav {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: white;
    border-top: 1px solid #f0f0f0;
    padding: 8px 0;
    z-index: 1000;
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.1);
}

.bottom-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 8px;
    cursor: pointer;
    transition: color 0.3s ease;
    flex: 1;
}

.bottom-nav-item:hover {
    color: #667eea;
}

.nav-icon {
    font-size: 20px;
}

.nav-label {
    font-size: 12px;
    font-weight: 500;
}

/* 页脚 */
.footer {
    background: #333;
    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 p {
    color: #ccc;
    margin-bottom: 20px;
}

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

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

.footer-section ul li a {
    color: #ccc;
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.social-links {
    display: flex;
    gap: 16px;
}

.social-link {
    color: #ccc;
    text-decoration: none;
    padding: 8px 16px;
    border: 1px solid #555;
    border-radius: 6px;
    transition: all 0.3s ease;
}

.social-link:hover {
    color: white;
    border-color: #667eea;
    background: #667eea;
}

.footer-bottom {
    border-top: 1px solid #555;
    padding-top: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-links a {
    color: #ccc;
    text-decoration: none;
    transition: color 0.3s ease;
}

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

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu,
    .nav-actions {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .banner-container {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
    
    .banner-title {
        font-size: 32px;
    }
    
    .banner-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .banner-stats {
        justify-content: center;
        gap: 20px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .market-header,
    .market-row {
        grid-template-columns: 1fr;
        gap: 10px;
    }
    
    .market-col {
        justify-content: space-between;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .download-content {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
    
    .download-features {
        grid-template-columns: 1fr;
    }
    
    .download-actions {
        flex-direction: column;
        align-items: center;
        gap: 20px;
    }
    
    .phone-mockup {
        width: 250px;
        height: 500px;
        margin: 0 auto;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .mobile-bottom-nav {
        display: flex;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
    
    .footer-links {
        justify-content: center;
    }
    
    /* 为移动端底部菜单栏留出空间 */
    body {
        padding-bottom: 80px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    
    .banner {
        padding: 100px 0 60px;
    }
    
    .banner-title {
        font-size: 28px;
    }
    
    .banner-description {
        font-size: 16px;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .features,
    .markets,
    .about,
    .contact {
        padding: 60px 0;
    }
    
    .btn-large {
        padding: 14px 28px;
        font-size: 14px;
    }
    
    .trading-interface {
        padding: 20px;
    }
    
    .chart-placeholder {
        width: 250px;
        height: 120px;
    }
    
    .floating-card {
        padding: 20px;
        max-width: 250px;
    }
    
    .contact-form {
        padding: 30px 20px;
    }
}

/* 滚动行为 */
html {
    scroll-behavior: smooth;
}

/* 加载动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.feature-card,
.market-row,
.contact-item {
    animation: fadeInUp 0.6s ease-out;
}

/* 焦点可访问性 */
.btn:focus,
.nav-link:focus,
.bottom-nav-item:focus {
    outline: 2px solid #667eea;
    outline-offset: 2px;
}

/* 打印样式 */
@media print {
    .header,
    .mobile-bottom-nav,
    .banner-actions,
    .contact-form {
        display: none;
    }
    
    .banner {
        background: #667eea !important;
        -webkit-print-color-adjust: exact;
    }
}