* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'PingFang SC', 'Microsoft YaHei', sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #f8f9fa;
}

/* 工具类 */
.bian-container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.bian-btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    text-align: center;
    text-decoration: none;
    transition: all 0.3s ease;
    cursor: pointer;
}

.bian-btn-primary {
    background-color: #f0b90b;
    color: #16181c;
}

.bian-btn-primary:hover {
    background-color: #d9a70a;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(240, 185, 11, 0.3);
}

.bian-btn-secondary {
    background-color: #16181c;
    color: #f0b90b;
    border: 1px solid #f0b90b;
}

.bian-btn-secondary:hover {
    background-color: #2a2d33;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(22, 24, 28, 0.3);
}

.bian-section {
    padding: 60px 0;
}

.bian-section-title {
    text-align: center;
    font-size: 28px;
    margin-bottom: 40px;
    color: #16181c;
    position: relative;
}

.bian-section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background-color: #f0b90b;
    border-radius: 2px;
}

/* 头部样式 */
.bian-header {
    background-color: #16181c;
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.bian-logo {
    display: flex;
    align-items: center;
}

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

.bian-logo-text {
    color: #f0b90b;
    font-size: 24px;
    font-weight: 700;
    margin-left: 10px;
}

.bian-nav {
    display: flex;
    justify-content: flex-end;
}

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

.bian-nav-item {
    margin-left: 30px;
}

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

.bian-nav-link:hover {
    color: #f0b90b;
}

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

/* 英雄区域 */
.bian-hero {
    background: linear-gradient(135deg, #16181c 0%, #0d0e10 100%);
    color: #fff;
    padding: 80px 0;
    text-align: center;
}

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

.bian-hero-title {
    font-size: 42px;
    margin-bottom: 20px;
    line-height: 1.2;
}

.bian-hero-subtitle {
    font-size: 20px;
    margin-bottom: 40px;
    opacity: 0.9;
}

.bian-hero-btns {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

/* Binance介绍 */
.bian-about {
    background-color: #fff;
}

.bian-about-content {
    display: flex;
    align-items: center;
    gap: 40px;
}

.bian-about-text {
    flex: 1;
}

.bian-about-title {
    font-size: 24px;
    margin-bottom: 20px;
    color: #16181c;
}

.bian-about-desc {
    margin-bottom: 20px;
    color: #666;
}

.bian-about-features {
    list-style: none;
}

.bian-about-feature {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
}

.bian-about-feature::before {
    content: '';
    display: inline-block;
    width: 20px;
    height: 20px;
    background-color: #f0b90b;
    mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath fill='currentColor' d='M9 16.17L4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41z'/%3E%3C/svg%3E") no-repeat center;
    -webkit-mask: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24'%3E%3Cpath fill='currentColor' d='M9 16.17L4.83 12l-1.42 1.41L9 19 21 7l-1.41-1.41z'/%3E%3C/svg%3E") no-repeat center;
    margin-right: 10px;
}

.bian-about-image {
    flex: 1;
    text-align: center;
}

.bian-about-img {
    max-width: 100%;
    border-radius: 12px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

/* App介绍 */
.bian-app {
    background-color: #f8f9fa;
}

.bian-app-content {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.bian-app-text {
    text-align: center;
}

.bian-app-title {
    font-size: 24px;
    margin-bottom: 20px;
    color: #16181c;
}

.bian-app-desc {
    margin-bottom: 30px;
    color: #666;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.bian-app-screenshots {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

.bian-app-screenshot {
    width: 200px;
    border-radius: 16px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s;
}

.bian-app-screenshot:hover {
    transform: translateY(-10px);
}

/* 评论区域 */
.bian-reviews {
    background-color: #fff;
}

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

.bian-review-card {
    background: #f8f9fa;
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.bian-review-header {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
}

.bian-review-avatar {
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background-color: #f0b90b;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #16181c;
    font-weight: bold;
    margin-right: 15px;
}

.bian-review-info h4 {
    margin-bottom: 5px;
}

.bian-review-rating {
    color: #f0b90b;
}

.bian-review-content {
    color: #666;
}

/* 常见问题 */
.bian-faq {
    background-color: #f8f9fa;
}

.bian-faq-item {
    background: #fff;
    margin-bottom: 15px;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.bian-faq-question {
    padding: 20px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.bian-faq-answer {
    padding: 0 20px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    color: #666;
}

.bian-faq-item.active .bian-faq-answer {
    padding: 20px;
    max-height: 500px;
}

/* 历史版本 */
.bian-versions {
    background-color: #fff;
}

.bian-versions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
}

.bian-version-card {
    border: 1px solid #eaeaea;
    border-radius: 10px;
    padding: 20px;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
}

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

.bian-version-number {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
    color: #16181c;
}

.bian-version-date {
    color: #999;
    margin-bottom: 15px;
}

/* 下载区域 */
.bian-download {
    background: linear-gradient(135deg, #16181c 0%, #0d0e10 100%);
    color: #fff;
    text-align: center;
    padding: 80px 0;
}

.bian-download-title {
    font-size: 32px;
    margin-bottom: 20px;
}

.bian-download-platforms {
    display: flex;
    justify-content: center;
    gap: 30px;
    flex-wrap: wrap;
    margin-top: 40px;
}

.bian-platform-card {
    background: rgba(255, 255, 255, 0.08);
    padding: 30px 40px;
    border-radius: 16px;
    width: 250px;
    transition: transform 0.3s, background 0.3s;
}

.bian-platform-card:hover {
    transform: translateY(-10px);
    background: rgba(255, 255, 255, 0.12);
}

.bian-platform-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(240, 185, 11, 0.2);
    border-radius: 16px;
}

.bian-platform-icon svg {
    width: 32px;
    height: 32px;
    fill: #f0b90b;
}

.bian-platform-title {
    font-size: 22px;
    margin-bottom: 15px;
}

/* 公告区域 */
.bian-announcements {
    background-color: #fff;
}

.bian-announcements-list {
    list-style: none;
}

.bian-announcement-item {
    padding: 20px 0;
    border-bottom: 1px solid #eee;
    display: flex;
}

.bian-announcement-date {
    min-width: 100px;
    color: #999;
    font-size: 14px;
}

.bian-announcement-content h3 {
    margin-bottom: 8px;
    color: #16181c;
}

.bian-announcement-content p {
    color: #666;
}

/* 页脚 */
.bian-footer {
    background-color: #16181c;
    color: #aaa;
    padding: 40px 0 20px;
}

.bian-footer-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    margin-bottom: 30px;
}

.bian-footer-column {
    flex: 1;
    min-width: 200px;
    margin-bottom: 20px;
}

.bian-footer-title {
    color: #f0b90b;
    margin-bottom: 20px;
    font-size: 18px;
}

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

.bian-footer-link {
    margin-bottom: 10px;
}

.bian-footer-link a {
    color: #aaa;
    text-decoration: none;
    transition: color 0.3s;
}

.bian-footer-link a:hover {
    color: #f0b90b;
}

.bian-copyright {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #333;
    font-size: 14px;
}

/* 悬浮广告 */
.bian-floating-ad {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(135deg, #f0b90b 0%, #d9a70a 100%);
    padding: 15px 0;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.2);
    z-index: 1000;
    display: flex;
    justify-content: center;
    align-items: center;
}

.bian-floating-ad-content {
    display: flex;
    align-items: center;
    max-width: 1200px;
    width: 100%;
    padding: 0 20px;
}

.bian-floating-ad-text {
    color: #16181c;
    font-weight: 600;
    margin-right: 20px;
    flex: 1;
}

.bian-floating-ad-btns {
    display: flex;
    gap: 15px;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .bian-about-content {
        flex-direction: column;
    }
    
    .bian-hero-title {
        font-size: 36px;
    }
    
    .bian-section {
        padding: 40px 0;
    }
}

@media (max-width: 768px) {
    .bian-nav {
        display: none;
    }
    
    .bian-hero-title {
        font-size: 28px;
    }
    
    .bian-hero-subtitle {
        font-size: 18px;
    }
    
    .bian-section-title {
        font-size: 24px;
    }
    
    .bian-download-platforms {
        flex-direction: column;
        align-items: center;
    }
    
    .bian-platform-card {
        width: 100%;
        max-width: 350px;
    }
    
    .bian-floating-ad-btns {
        flex-direction: column;
        gap: 10px;
    }
}

@media (max-width: 480px) {
    .bian-hero {
        padding: 60px 0;
    }
    
    .bian-hero-btns {
        flex-direction: column;
        align-items: center;
    }
    
    .bian-btn {
        width: 100%;
        max-width: 300px;
    }
    
    .bian-section-title {
        font-size: 22px;
    }
    
    .bian-about-title, .bian-app-title {
        font-size: 22px;
    }
}
.bian-announcement-content h3 a {
    color: #16161c !important;
}