/* 全局样式重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f5f7fa;
}

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

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
}

.btn-primary {
    background-color: #007bff;
    color: #fff;
}

.btn-primary:hover {
    background-color: #0056b3;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 123, 255, 0.3);
}

.btn-secondary {
    background-color: #6c757d;
    color: #fff;
}

.btn-secondary:hover {
    background-color: #545b62;
    transform: translateY(-2px);
}

.btn-outline {
    background-color: transparent;
    color: #007bff;
    border: 2px solid #007bff;
}

.btn-outline:hover {
    background-color: #007bff;
    color: #fff;
}

.btn-lg {
    padding: 15px 30px;
    font-size: 18px;
}

.btn-sm {
    padding: 5px 15px;
    font-size: 14px;
}

/* 头部样式 */
.header {
    background-color: #fff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: all 0.3s ease;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

.logo {
    display: flex;
    align-items: center;
    font-size: 24px;
    font-weight: 700;
    color: #007bff;
}

.logo i {
    margin-right: 10px;
    font-size: 30px;
}

.nav ul {
    display: flex;
    list-style: none;
}

.nav ul li {
    margin-left: 30px;
}

.nav ul li a {
    text-decoration: none;
    color: #333;
    font-weight: 600;
    transition: color 0.3s ease;
}

.nav ul li a:hover {
    color: #007bff;
}

.header-actions {
    display: flex;
    gap: 15px;
}

/* 英雄区域样式 */
.hero {
    margin-top: 80px;
    padding: 80px 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: #fff;
}

.hero-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 50px;
}

.hero-text h1 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 15px;
    line-height: 1.2;
}

.hero-text p {
    font-size: 24px;
    margin-bottom: 20px;
    opacity: 0.9;
}

.hero-subtitle {
    display: flex;
    gap: 20px;
    margin-bottom: 30px;
    font-size: 16px;
}

.hero-subtitle span {
    background-color: rgba(255, 255, 255, 0.2);
    padding: 8px 15px;
    border-radius: 20px;
    backdrop-filter: blur(10px);
}

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

.hero-image img {
    max-width: 100%;
    height: auto;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

/* 特点介绍样式 */
.features {
    padding: 80px 0;
    background-color: #fff;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-header h2 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 15px;
    color: #2c3e50;
}

.section-header p {
    font-size: 18px;
    color: #666;
    max-width: 600px;
    margin: 0 auto;
}

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

.feature-item {
    background-color: #f8f9fa;
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    transition: all 0.3s ease;
    border: 1px solid #e9ecef;
}

.feature-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
    border-color: #007bff;
}

.feature-icon {
    width: 60px;
    height: 60px;
    background-color: #007bff;
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 24px;
}

.feature-item h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 15px;
    color: #2c3e50;
}

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

/* 交易品种样式 */
.trading {
    padding: 80px 0;
    background-color: #f5f7fa;
}

.trading-table {
    background-color: #fff;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.trading-table table {
    width: 100%;
    border-collapse: collapse;
}

.trading-table th,
.trading-table td {
    padding: 20px;
    text-align: left;
    border-bottom: 1px solid #e9ecef;
}

.trading-table th {
    background-color: #f8f9fa;
    font-weight: 600;
    color: #2c3e50;
    text-transform: uppercase;
    font-size: 14px;
}

.trading-table tr:last-child td {
    border-bottom: none;
}

.trading-table tr:hover {
    background-color: #f8f9fa;
}

.positive {
    color: #28a745;
    font-weight: 600;
}

.negative {
    color: #dc3545;
    font-weight: 600;
}

/* 安全保障样式 */
.security {
    padding: 80px 0;
    background-color: #fff;
}

.security-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 50px;
}

.security-image img {
    max-width: 100%;
    height: auto;
    border-radius: 10px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.security-text h2 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 30px;
    color: #2c3e50;
}

.security-features {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.security-item {
    display: flex;
    align-items: flex-start;
    gap: 20px;
}

.security-item i {
    width: 40px;
    height: 40px;
    background-color: #007bff;
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    margin-top: 5px;
    flex-shrink: 0;
}

.security-item h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 10px;
    color: #2c3e50;
}

.security-item p {
    color: #666;
    line-height: 1.6;
}

/* 用户评价样式 */
.testimonials {
    padding: 80px 0;
    background-color: #f5f7fa;
}

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

.testimonial-item {
    background-color: #fff;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: all 0.3s ease;
}

.testimonial-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.1);
}

.testimonial-rating {
    color: #ffc107;
    margin-bottom: 20px;
    font-size: 18px;
}

.testimonial-item p {
    color: #666;
    line-height: 1.6;
    margin-bottom: 25px;
    font-style: italic;
}

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

.testimonial-user img {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    object-fit: cover;
}

.testimonial-user h4 {
    font-size: 16px;
    font-weight: 600;
    color: #2c3e50;
    margin-bottom: 5px;
}

.testimonial-user p {
    font-size: 14px;
    color: #666;
    margin: 0;
    font-style: normal;
}

/* 常见问题样式 */
.faq {
    padding: 80px 0;
    background-color: #fff;
}

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

.faq-item {
    border-bottom: 1px solid #e9ecef;
    margin-bottom: 20px;
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
    cursor: pointer;
    transition: all 0.3s ease;
}

.faq-question h3 {
    font-size: 18px;
    font-weight: 600;
    color: #2c3e50;
    margin: 0;
}

.faq-question i {
    font-size: 16px;
    color: #007bff;
    transition: transform 0.3s ease;
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
}

.faq-answer {
    padding: 0 0 20px 0;
    max-height: 0;
    overflow: hidden;
    transition: all 0.3s ease;
    opacity: 0;
}

.faq-item.active .faq-answer {
    max-height: 200px;
    opacity: 1;
}

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

/* 底部样式 */
.footer {
    background-color: #2c3e50;
    color: #fff;
    padding: 80px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-logo {
    display: flex;
    align-items: center;
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 20px;
}

.footer-logo i {
    margin-right: 10px;
    font-size: 30px;
}

.footer-links h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 20px;
    color: #fff;
}

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

.footer-links ul li {
    margin-bottom: 15px;
}

.footer-links ul li a {
    color: #adb5bd;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-links ul li a:hover {
    color: #007bff;
}

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

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

.footer-social a:hover {
    background-color: #007bff;
    transform: translateY(-2px);
}

.footer-bottom {
    text-align: center;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #adb5bd;
    font-size: 14px;
}

.footer-policies {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 15px;
}

.footer-policies a {
    color: #adb5bd;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-policies a:hover {
    color: #007bff;
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .container {
        max-width: 100%;
    }
}

@media (max-width: 992px) {
    .hero-content,
    .security-content {
        flex-direction: column;
        text-align: center;
    }

    .hero-cta {
        justify-content: center;
    }

    .nav {
        display: none;
    }

    .header-actions {
        gap: 10px;
    }

    .btn-lg {
        padding: 12px 25px;
        font-size: 16px;
    }
}

@media (max-width: 768px) {
    .hero-text h1 {
        font-size: 36px;
    }

    .hero-text p {
        font-size: 20px;
    }

    .hero-subtitle {
        flex-wrap: wrap;
        justify-content: center;
    }

    .hero-cta {
        flex-direction: column;
        align-items: center;
    }

    .section-header h2 {
        font-size: 28px;
    }

    .features-grid,
    .testimonials-grid {
        grid-template-columns: 1fr;
    }

    .trading-table {
        overflow-x: auto;
    }

    .trading-table th,
    .trading-table td {
        padding: 15px 10px;
        font-size: 14px;
    }

    .security-text h2 {
        font-size: 28px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .footer-social {
        justify-content: center;
    }
}

@media (max-width: 576px) {
    .header-content {
        padding: 15px 0;
    }

    .logo {
        font-size: 20px;
    }

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

    .header-actions {
        gap: 5px;
    }

    .btn {
        padding: 8px 15px;
        font-size: 14px;
    }

    .hero {
        padding: 60px 0;
    }

    .hero-text h1 {
        font-size: 28px;
    }

    .hero-text p {
        font-size: 18px;
    }

    .features,
    .trading,
    .security,
    .testimonials,
    .faq,
    .footer {
        padding: 60px 0;
    }
}

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

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

.feature-item,
.testimonial-item,
.faq-item {
    animation: fadeInUp 0.6s ease forwards;
}

.feature-item:nth-child(1) { animation-delay: 0.1s; }
.feature-item:nth-child(2) { animation-delay: 0.2s; }
.feature-item:nth-child(3) { animation-delay: 0.3s; }
.feature-item:nth-child(4) { animation-delay: 0.4s; }
.feature-item:nth-child(5) { animation-delay: 0.5s; }
.feature-item:nth-child(6) { animation-delay: 0.6s; }

.testimonial-item:nth-child(1) { animation-delay: 0.1s; }
.testimonial-item:nth-child(2) { animation-delay: 0.2s; }
.testimonial-item:nth-child(3) { animation-delay: 0.3s; }

.faq-item:nth-child(1) { animation-delay: 0.1s; }
.faq-item:nth-child(2) { animation-delay: 0.2s; }
.faq-item:nth-child(3) { animation-delay: 0.3s; }
.faq-item:nth-child(4) { animation-delay: 0.4s; }
.faq-item:nth-child(5) { animation-delay: 0.5s; }