/* 基础变量 */
:root {
    --primary: #0e7aff;
    --primary-dark: #0a6ae6;
    --secondary: #6c757d;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --dark: #1e293b;
    --light: #f8fafc;
    --gray: #64748b;
    --gray-light: #e2e8f0;
    
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --radius: 8px;
    
    --font-heading: 'Poppins', 'Noto Sans SC', sans-serif;
    --font-body: 'Noto Sans SC', sans-serif;
}

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

body {
    font-family: var(--font-body);
    color: var(--dark);
    background: linear-gradient(135deg, #f5f7fa 0%, #f8fafc 100%);
    min-height: 100vh;
}

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

/* 顶部通知 */
.top-notice {
    background: linear-gradient(90deg, var(--primary), var(--primary-dark));
    color: white;
    padding: 10px 0;
    font-size: 14px;
}

.top-notice .container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
}

.notice-link {
    color: white;
    font-weight: 600;
    text-decoration: none;
    margin-left: 10px;
}

.notice-link:hover {
    text-decoration: underline;
}

/* 头部导航 */
.main-header {
    background: white;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

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

/* Logo样式 */
.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    gap: 12px;
}

.logo-icon {
    background: linear-gradient(135deg, var(--primary), #3b82f6);
    color: white;
    width: 40px;
    height: 40px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.2;
}

.logo-primary {
    font-family: var(--font-heading);
    font-size: 24px;
    font-weight: 700;
    color: var(--primary);
    letter-spacing: -0.5px;
}

.logo-sub {
    font-size: 12px;
    color: var(--gray);
    font-weight: 500;
}

/* 导航菜单 */
.nav-menu {
    display: flex;
    align-items: center;
    gap: 20px;
}

.menu-left, .menu-right {
    display: flex;
    align-items: center;
    gap: 15px;
}

.nav-link {
    color: var(--dark);
    text-decoration: none;
    padding: 8px 12px;
    border-radius: var(--radius);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: all 0.3s ease;
}

.nav-link:hover, .nav-link.active {
    color: var(--primary);
    background: rgba(14, 122, 255, 0.1);
}

/* 下拉菜单 */
.nav-dropdown {
    position: relative;
}

.dropdown-content {
    position: absolute;
    top: 100%;
    left: 0;
    background: white;
    min-width: 200px;
    box-shadow: var(--shadow-lg);
    border-radius: var(--radius);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 100;
}

.nav-dropdown:hover .dropdown-content {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-content a {
    display: block;
    padding: 12px 16px;
    color: var(--dark);
    text-decoration: none;
    border-bottom: 1px solid var(--gray-light);
    transition: all 0.2s ease;
}

.dropdown-content a:hover {
    color: var(--primary);
    background: var(--light);
}

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 24px;
    border-radius: var(--radius);
    font-weight: 600;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: var(--font-heading);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(14, 122, 255, 0.3);
}

.btn-secondary {
    background: var(--light);
    color: var(--primary);
    border: 2px solid var(--primary);
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}

.btn-outline:hover {
    background: var(--primary);
    color: white;
}

.btn-large {
    padding: 14px 32px;
    font-size: 16px;
}

.btn-xlarge {
    padding: 18px 40px;
    font-size: 18px;
    font-weight: 700;
}

/* 面包屑导航 */
.breadcrumb-nav {
    background: var(--light);
    padding: 15px 0;
    border-bottom: 1px solid var(--gray-light);
}

.breadcrumb-nav a {
    color: var(--gray);
    text-decoration: none;
}

.breadcrumb-nav .current {
    color: var(--primary);
    font-weight: 600;
}

.separator {
    color: var(--gray);
    margin: 0 10px;
    opacity: 0.5;
}

/* 英雄区域 */
.hero-section {
    padding: 80px 0;
    background: linear-gradient(135deg, #ffffff 0%, #f8fafc 100%);
}

.hero-section .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: 48px;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 20px;
}

.hero-title .highlight {
    color: var(--primary);
    position: relative;
}

.hero-title .highlight::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 8px;
    background: rgba(14, 122, 255, 0.2);
    z-index: -1;
}

.hero-description {
    font-size: 18px;
    color: var(--gray);
    margin-bottom: 30px;
    line-height: 1.6;
}

.hero-description .highlight {
    color: var(--primary);
    font-weight: 600;
}

/* 统计数据 */
.hero-stats {
    display: flex;
    gap: 30px;
    margin: 40px 0;
}

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

.stat-number {
    font-family: var(--font-heading);
    font-size: 32px;
    font-weight: 700;
    color: var(--primary);
    line-height: 1;
}

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

.hero-cta {
    display: flex;
    gap: 20px;
}

/* 优势卡片 */
.advantages-section {
    padding: 80px 0;
    background: white;
}

.section-title {
    font-family: var(--font-heading);
    font-size: 36px;
    text-align: center;
    margin-bottom: 60px;
}

.section-title .highlight {
    color: var(--primary);
}

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

.advantage-card {
    background: var(--light);
    padding: 40px 30px;
    border-radius: var(--radius);
    text-align: center;
    transition: all 0.3s ease;
}

.advantage-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.advantage-icon {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 25px;
    font-size: 28px;
    color: white;
}

.advantage-icon.security {
    background: linear-gradient(135deg, #10b981, #059669);
}

.advantage-icon.fee {
    background: linear-gradient(135deg, #f59e0b, #d97706);
}

.advantage-icon.product {
    background: linear-gradient(135deg, #8b5cf6, #7c3aed);
}

.advantage-icon.liquidity {
    background: linear-gradient(135deg, #3b82f6, #1d4ed8);
}

.advantage-card h3 {
    font-family: var(--font-heading);
    font-size: 22px;
    margin-bottom: 15px;
    color: var(--dark);
}

.advantage-card p {
    color: var(--gray);
    line-height: 1.6;
}

/* 产品卡片 */
.products-section {
    padding: 80px 0;
    background: linear-gradient(135deg, #f8fafc 0%, #ffffff 100%);
}

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

.product-card {
    background: white;
    border-radius: var(--radius);
    padding: 40px 30px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    border: 1px solid transparent;
}

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

.product-card.featured {
    border-color: var(--primary);
    position: relative;
    overflow: hidden;
}

.product-card.featured::before {
    content: '热门推荐';
    position: absolute;
    top: 20px;
    right: -30px;
    background: var(--primary);
    color: white;
    padding: 5px 30px;
    transform: rotate(45deg);
    font-size: 12px;
    font-weight: 600;
}

.product-header {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
}

.product-icon {
    width: 50px;
    height: 50px;
    background: var(--light);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 22px;
}

.product-header h3 {
    font-family: var(--font-heading);
    font-size: 24px;
    flex: 1;
}

.product-tag {
    background: var(--light);
    color: var(--primary);
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.product-card p {
    color: var(--gray);
    margin-bottom: 25px;
    line-height: 1.6;
}

.product-features {
    list-style: none;
    margin-bottom: 30px;
}

.product-features li {
    margin-bottom: 10px;
    color: var(--dark);
}

.product-features i {
    color: var(--success);
    margin-right: 10px;
}

/* CTA区域 */
.cta-section {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    padding: 100px 0;
    text-align: center;
}

.cta-section .highlight {
    color: #ffd700;
}

.cta-section h2 {
    font-family: var(--font-heading);
    font-size: 42px;
    margin-bottom: 20px;
}

.cta-section p {
    font-size: 18px;
    opacity: 0.9;
    margin-bottom: 40px;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-bottom: 40px;
}

.cta-features {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-top: 30px;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 500;
}

/* 页脚 */
.main-footer {
    background: var(--dark);
    color: white;
    padding: 60px 0 30px;
}

.footer-top {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 60px;
    margin-bottom: 50px;
}

.footer-description {
    color: rgba(255, 255, 255, 0.7);
    margin: 20px 0;
    line-height: 1.6;
}

.footer-social {
    display: flex;
    gap: 15px;
}

.social-link {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-link:hover {
    background: var(--primary);
    transform: translateY(-3px);
}

.footer-links-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
}

.footer-column h4 {
    font-family: var(--font-heading);
    font-size: 18px;
    margin-bottom: 20px;
    color: white;
}

.footer-column h4 i {
    margin-right: 10px;
    color: var(--primary);
}

.footer-links {
    list-style: none;
}

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

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.footer-links a:hover {
    color: white;
    padding-left: 5px;
}

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

.footer-legal {
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: rgba(255, 255, 255, 0.5);
    font-size: 14px;
}

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

.footer-legal-links a {
    color: rgba(255, 255, 255, 0.5);
    text-decoration: none;
    transition: all 0.3s ease;
}

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

/* 移动端适配 */
@media (max-width: 992px) {
    .hero-section .container {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .footer-top {
        grid-template-columns: 1fr;
    }
    
    .footer-links-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .hero-title {
        font-size: 36px;
    }
    
    .nav-menu {
        display: none;
    }
    
    .mobile-menu-btn {
        display: block;
        background: none;
        border: none;
        font-size: 24px;
        color: var(--dark);
        cursor: pointer;
    }
    
    .hero-stats {
        flex-direction: column;
        gap: 20px;
    }
    
    .hero-cta, .cta-buttons {
        flex-direction: column;
    }
    
    .cta-features {
        flex-direction: column;
        gap: 20px;
    }
    
    .footer-links-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-legal {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
    
    .footer-legal-links {
        flex-wrap: wrap;
        justify-content: center;
    }
}