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

body {
    font-family: 'Noto Sans SC', sans-serif;
    color: #333;
    line-height: 1.6;
    background-color: #f9fafb;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

a {
    text-decoration: none;
    color: #333;
    transition: color 0.3s ease;
}

a:hover {
    color: #f3ba2f;
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    margin-bottom: 15px;
    line-height: 1.2;
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
    text-align: center;
    margin-bottom: 30px;
}

h3 {
    font-size: 1.5rem;
}

p {
    margin-bottom: 15px;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 10px 25px;
    border-radius: 30px;
    font-weight: 500;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-primary {
    background-color: #f3ba2f;
    color: #000;
    border: 2px solid #f3ba2f;
}

.btn-primary:hover {
    background-color: transparent;
    color: #f3ba2f;
}

.btn-secondary {
    background-color: transparent;
    color: #333;
    border: 2px solid #333;
}

.btn-secondary:hover {
    background-color: #333;
    color: #fff;
}

/* 头部样式 */
header {
    position: sticky;
    top: 0;
    background-color: #fff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    z-index: 100;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.logo a {
    display: flex;
    align-items: center;
    font-size: 1.5rem;
    font-weight: 700;
}

.logo img {
    margin-right: 10px;
}

nav ul {
    display: flex;
}

nav ul li {
    margin-left: 25px;
}

nav ul li a {
    font-weight: 500;
}

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

.mobile-menu-toggle span {
    display: block;
    width: 25px;
    height: 3px;
    background-color: #333;
    margin-bottom: 5px;
    border-radius: 2px;
    transition: all 0.3s ease;
}

/* 英雄区域样式 */
.hero {
    padding: 80px 0;
    background: linear-gradient(135deg, #f8f8f8 0%, #e9f0ff 100%);
}

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

.hero-text {
    width: 48%;
}

.hero-image {
    width: 48%;
}

.hero h1 {
    margin-bottom: 20px;
    color: #212529;
}

.hero p {
    font-size: 1.2rem;
    margin-bottom: 30px;
    color: #4a5568;
}

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

/* 功能特点样式 */
.features {
    padding: 80px 0;
    background-color: #fff;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.feature-card {
    background-color: #fff;
    border-radius: 10px;
    padding: 30px;
    text-align: center;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-5px);
}

.feature-icon {
    margin-bottom: 20px;
}

.feature-card h3 {
    margin-bottom: 15px;
}

/* 下载区域样式 */
.download {
    padding: 80px 0;
    background-color: #f5f5f5;
    text-align: center;
}

.section-desc {
    max-width: 600px;
    margin: 0 auto 40px;
    font-size: 1.1rem;
}

.download-options {
    display: flex;
    justify-content: center;
    gap: 30px;
}

.download-card {
    background-color: #fff;
    border-radius: 10px;
    padding: 30px;
    width: 300px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.download-icon {
    margin-bottom: 20px;
}

.download-btn {
    margin-top: 20px;
}

/* 关于区域样式 */
.about {
    padding: 80px 0;
    background-color: #fff;
}

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

.about-text {
    max-width: 800px;
    text-align: center;
}

/* 安全区域样式 */
.security {
    padding: 80px 0;
    background-color: #f9fafb;
}

.security-features {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.security-feature {
    text-align: center;
    padding: 30px;
    background-color: #fff;
    border-radius: 10px;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
}

.security-icon {
    margin-bottom: 20px;
}

/* 页脚样式 */
footer {
    background-color: #212529;
    color: #f8f9fa;
    padding: 60px 0 30px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    margin-bottom: 40px;
}

.footer-logo {
    width: 30%;
}

.footer-logo p {
    margin-top: 15px;
}

.footer-links {
    width: 70%;
    display: flex;
    justify-content: space-between;
}

.footer-column h4 {
    color: #f3ba2f;
    margin-bottom: 20px;
}

.footer-column ul li {
    margin-bottom: 10px;
}

.footer-column ul li a {
    color: #dee2e6;
}

.footer-column ul li a:hover {
    color: #f3ba2f;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #495057;
}

.footer-bottom a {
    color: #f3ba2f;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .features-grid,
    .security-features {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .header-content {
        height: 70px;
    }
    
    nav {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .hero-content {
        flex-direction: column;
    }
    
    .hero-text,
    .hero-image {
        width: 100%;
        text-align: center;
    }
    
    .hero-text {
        margin-bottom: 30px;
    }
    
    .cta-buttons {
        justify-content: center;
    }
    
    .download-options {
        flex-direction: column;
        align-items: center;
    }
    
    .footer-content {
        flex-direction: column;
    }
    
    .footer-logo,
    .footer-links {
        width: 100%;
    }
    
    .footer-logo {
        margin-bottom: 30px;
        text-align: center;
    }
    
    .footer-links {
        flex-wrap: wrap;
    }
    
    .footer-column {
        width: 50%;
        margin-bottom: 30px;
    }
}

@media (max-width: 576px) {
    h1 {
        font-size: 2rem;
    }
    
    h2 {
        font-size: 1.8rem;
    }
    
    .features-grid,
    .security-features {
        grid-template-columns: 1fr;
    }
    
    .footer-column {
        width: 100%;
    }
}

/* 币安主题色调 */
.logo a span,
.feature-card:hover h3,
.security-feature:hover h3 {
    color: #f3ba2f;
}