/* 基础样式重置和全局设置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #ffffff;
}

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

/* 导航栏样式 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid #e5e7eb;
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

.nav-brand {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: bold;
    color: #1f2937;
}

.logo-img {
    height: 32px;
    width: auto;
    margin-right: 0.5rem;
    object-fit: contain;
    transition: all 0.3s ease;
}

.nav-brand:hover .logo-img {
    transform: scale(1.05);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-menu a {
    text-decoration: none;
    color: #6b7280;
    font-weight: 500;
    transition: color 0.3s ease;
}

.nav-menu a:hover {
    color: #3b82f6;
}

.mobile-menu-toggle {
    display: none;
    cursor: pointer;
    font-size: 1.5rem;
}

/* 按钮样式 */
.btn-primary {
    background: linear-gradient(135deg, #3b82f6, #1d4ed8);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.4);
}

.btn-secondary {
    background: transparent;
    color: #3b82f6;
    border: 2px solid #3b82f6;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-decoration: none;
    display: inline-block;
}

.btn-secondary:hover {
    background: #3b82f6;
    color: white;
    transform: translateY(-2px);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

/* 英雄区域样式 */
.hero {
    margin-top: 74px;
    padding: 4rem 0;
    background: linear-gradient(135deg, #f8fafc 0%, #e2e8f0 100%);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 200%;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.1) 0%, transparent 70%);
    animation: rotate 20s linear infinite;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-text h1 {
    font-size: 3.5rem;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, #1f2937, #3b82f6);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-text p {
    font-size: 1.25rem;
    color: #6b7280;
    margin-bottom: 2rem;
}

.hero-stats {
    display: flex;
    gap: 2rem;
    margin-bottom: 2rem;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 2rem;
    font-weight: bold;
    color: #3b82f6;
}

.stat-label {
    font-size: 0.875rem;
    color: #6b7280;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
}

.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.crypto-animation {
    position: relative;
    width: 300px;
    height: 300px;
}

.crypto-card {
    position: absolute;
    width: 80px;
    height: 80px;
    background: white;
    border-radius: 1rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
    animation: float 3s ease-in-out infinite;
}

.crypto-card:nth-child(1) {
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    animation-delay: 0s;
}

.crypto-card:nth-child(2) {
    top: 50%;
    right: 0;
    transform: translateY(-50%);
    animation-delay: 0.5s;
}

.crypto-card:nth-child(3) {
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    animation-delay: 1s;
}

.crypto-card:nth-child(4) {
    top: 50%;
    left: 0;
    transform: translateY(-50%);
    animation-delay: 1.5s;
}

.crypto-card i {
    font-size: 1.5rem;
    color: #f7931a;
}

.crypto-card.usdt i,
.crypto-card.usdt span:first-child {
    color: #26a17b;
}

.crypto-card.usdc i,
.crypto-card.usdc span:first-child {
    color: #2775ca;
}

.crypto-card span:first-child {
    font-size: 1.5rem;
    font-weight: bold;
}

.crypto-card span:last-child {
    font-size: 0.75rem;
    font-weight: 600;
    margin-top: 0.25rem;
}

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

/* 支持币种展示 */
.supported-coins {
    padding: 4rem 0;
    background: white;
}

.supported-coins h2 {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 3rem;
    color: #1f2937;
}

.coins-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
}

.coin-item {
    text-align: center;
    padding: 2rem;
    border-radius: 1rem;
    background: #f8fafc;
    transition: all 0.3s ease;
}

.coin-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.coin-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    font-size: 1.5rem;
    font-weight: bold;
    color: white;
}

.coin-icon.btc {
    background: linear-gradient(135deg, #f7931a, #ff6b35);
}

.coin-icon.eth {
    background: linear-gradient(135deg, #627eea, #4f46e5);
}

.coin-icon.usdt {
    background: linear-gradient(135deg, #26a17b, #059669);
}

.coin-icon.usdc {
    background: linear-gradient(135deg, #2775ca, #1d4ed8);
}

.coin-icon.usdd {
    background: linear-gradient(135deg, #ff6b35, #f59e0b);
}

.coin-item h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: #1f2937;
}

.coin-item p {
    color: #6b7280;
    font-size: 0.875rem;
}

/* 功能特色 */
.features {
    padding: 4rem 0;
    background: #f8fafc;
}

.features h2 {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 3rem;
    color: #1f2937;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 1rem;
    text-align: center;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: linear-gradient(135deg, #3b82f6, #1d4ed8);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1rem;
    color: white;
    font-size: 1.5rem;
}

.feature-card h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: #1f2937;
}

.feature-card p {
    color: #6b7280;
    line-height: 1.6;
}

/* API 集成区域 */
.api-section {
    padding: 4rem 0;
    background: white;
}

.api-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.api-text h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: #1f2937;
}

.api-text p {
    font-size: 1.125rem;
    color: #6b7280;
    margin-bottom: 2rem;
}

.api-features {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.api-feature {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.api-feature i {
    color: #10b981;
    font-size: 1.125rem;
}

.api-code {
    background: #1f2937;
    border-radius: 1rem;
    overflow: hidden;
}

.code-tabs {
    display: flex;
    background: #374151;
}

.tab-btn {
    background: transparent;
    border: none;
    padding: 1rem 1.5rem;
    color: #9ca3af;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.3s ease;
}

.tab-btn.active,
.tab-btn:hover {
    background: #1f2937;
    color: white;
}

.code-content {
    position: relative;
}

.code-block {
    display: none;
    padding: 2rem;
}

.code-block.active {
    display: block;
}

.code-block pre {
    color: #e5e7eb;
    font-family: 'Consolas', 'Monaco', 'Courier New', monospace;
    font-size: 0.875rem;
    line-height: 1.6;
}

.code-block code {
    color: #e5e7eb;
}

/* 费率区域 */
.pricing {
    padding: 4rem 0;
    background: #f8fafc;
}

.pricing h2 {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 3rem;
    color: #1f2937;
}

.pricing-card {
    max-width: 500px;
    margin: 0 auto 4rem;
    background: white;
    border-radius: 1.5rem;
    padding: 3rem;
    text-align: center;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.pricing-header h3 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: #1f2937;
}

.price {
    display: flex;
    align-items: baseline;
    justify-content: center;
    margin-bottom: 1rem;
}

.price-number {
    font-size: 4rem;
    font-weight: 800;
    color: #3b82f6;
}

.price-symbol {
    font-size: 2rem;
    font-weight: 700;
    color: #3b82f6;
    margin-left: 0.25rem;
}

.pricing-header p {
    color: #6b7280;
    font-size: 1.125rem;
    margin-bottom: 2rem;
}

.pricing-features {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-bottom: 2rem;
}

.pricing-feature {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.pricing-feature i {
    color: #10b981;
    font-size: 1.125rem;
}

.advantages h3 {
    text-align: center;
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 2rem;
    color: #1f2937;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}

.advantage-item {
    text-align: center;
    padding: 2rem 1.5rem;
    background: white;
    border-radius: 1rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
    border: 1px solid #f3f4f6;
}

.advantage-item:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    border-color: #3b82f6;
}

.advantage-item i {
    font-size: 2.5rem;
    color: #3b82f6;
    margin-bottom: 1rem;
    transition: all 0.3s ease;
}

.advantage-item:hover i {
    transform: scale(1.1);
    color: #1d4ed8;
}

.advantage-item h4 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: #1f2937;
}

.advantage-item p {
    color: #6b7280;
    font-size: 0.9rem;
    line-height: 1.5;
}

/* 工作流程 */
.workflow {
    padding: 4rem 0;
    background: white;
}

.workflow h2 {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 3rem;
    color: #1f2937;
}

.workflow-steps {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
}

.step {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    max-width: 200px;
}

.step-number {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: linear-gradient(135deg, #3b82f6, #1d4ed8);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: bold;
    margin-bottom: 1rem;
}

.step-content h3 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: #1f2937;
}

.step-content p {
    color: #6b7280;
    font-size: 0.875rem;
}

.step-arrow {
    color: #d1d5db;
    font-size: 1.5rem;
}

/* 客户见证 */
.testimonials {
    padding: 4rem 0;
    background: #f8fafc;
}

.testimonials h2 {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 3rem;
    color: #1f2937;
}

.partners-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 2rem;
    align-items: center;
}

.partner-logo {
    text-align: center;
    padding: 2rem;
    background: white;
    border-radius: 1rem;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
}

.logo-placeholder {
    font-size: 1.125rem;
    font-weight: 700;
    color: #6b7280;
}

/* CTA 区域 */
.cta {
    padding: 4rem 0;
    background: linear-gradient(135deg, #1f2937, #374151);
    color: white;
}

.cta-content {
    text-align: center;
}

.cta-content h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
}

.cta-content p {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.cta-buttons {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

/* 页脚 */
.footer {
    background: #1f2937;
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-brand {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: bold;
    margin-bottom: 1rem;
}

.footer-brand .logo-img {
    height: 28px;
    width: auto;
    margin-right: 0.5rem;
    object-fit: contain;
    filter: brightness(1.2);
}

.footer-section h4 {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: white;
}

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

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

.footer-section ul li a {
    color: #d1d5db;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section ul li a:hover {
    color: #3b82f6;
}

.footer-bottom {
    border-top: 1px solid #374151;
    padding-top: 1rem;
    text-align: center;
    color: #9ca3af;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .logo-img {
        height: 28px;
    }
    
    .footer-brand .logo-img {
        height: 24px;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-text h1 {
        font-size: 2.5rem;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .api-content {
        grid-template-columns: 1fr;
    }
    
    .workflow-steps {
        flex-direction: column;
    }
    
    .step-arrow {
        transform: rotate(90deg);
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    /* 适用场景移动端优化 */
    .advantages-grid {
        grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
        gap: 1rem;
    }
    
    .advantage-item {
        padding: 1.5rem 1rem;
    }
    
    .advantage-item i {
        font-size: 2rem;
    }
    
    .advantage-item h4 {
        font-size: 1rem;
    }
    
    .advantage-item p {
        font-size: 0.85rem;
    }
}

@media (max-width: 480px) {
    .advantages-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .advantage-item {
        padding: 1.5rem;
        margin: 0 0.5rem;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 1rem;
    }
    
    .stat {
        padding: 0.5rem;
    }
}