/* ==================== 全局基础样式 ==================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: #000000;
    color: #ffffff;
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
}

ul {
    list-style: none;
}

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

.container {
    width: 90%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

/* ==================== 导航栏通用样式 ==================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    padding: 15px 0;
    transition: all 0.3s ease;
}

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

.logo {
    font-size: 24px;
    font-weight: 800;
    letter-spacing: 1px;
}

.nav-links {
    display: flex;
    gap: 25px;
}

.nav-links a {
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 8px 12px;
    border-radius: 4px;
    transition: all 0.3s ease;
}

/* ==================== 首页样式 (黑黄渐变主题) ==================== */
body.home-page {
    background: linear-gradient(135deg, #000000 0%, #1a1a00 50%, #000000 100%);
}

.home-page .navbar {
    background-color: rgba(0, 0, 0, 0.95);
    border-bottom: 2px solid #FFD700;
}

.home-page .logo {
    color: #FFD700;
}

.home-page .nav-links a {
    color: #ffffff;
}

.home-page .nav-links a:hover {
    background-color: #FFD700;
    color: #000000;
}

.hero-section {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    position: relative;
    overflow: hidden;
}

.hero-content {
    max-width: 800px;
    z-index: 2;
}

.hero-title {
    font-size: 4rem;
    font-weight: 900;
    margin-bottom: 20px;
    color: #FFD700;
    line-height: 1.1;
}

.hero-subtitle {
    font-size: 1.4rem;
    margin-bottom: 40px;
    color: #cccccc;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin: 60px 0;
}

.feature-card {
    background: rgba(255, 215, 0, 0.05);
    border: 1px solid rgba(255, 215, 0, 0.2);
    border-radius: 12px;
    padding: 30px;
    transition: transform 0.3s ease;
}

.feature-card:hover {
    transform: translateY(-10px);
    border-color: #FFD700;
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 15px;
    color: #FFD700;
}

.feature-title {
    font-size: 1.3rem;
    margin-bottom: 10px;
    color: #FFD700;
}

.faq-section {
    margin: 80px 0;
}

.faq-item {
    background: rgba(255, 255, 255, 0.03);
    border-left: 4px solid #FFD700;
    margin-bottom: 20px;
    padding: 20px;
    border-radius: 0 8px 8px 0;
}

.faq-question {
    font-size: 1.2rem;
    color: #FFD700;
    margin-bottom: 10px;
}

/* ==================== 币安下载页样式 (暗红主题) ==================== */
body.download-page {
    background: linear-gradient(180deg, #000000 0%, #1a0000 100%);
}

.download-page .navbar {
    background-color: rgba(26, 0, 0, 0.95);
    border-bottom: 2px solid #ff4444;
}

.download-page .logo {
    color: #ff4444;
}

.download-page .nav-links a:hover {
    background-color: #ff4444;
    color: #000000;
}

.download-hero {
    min-height: 70vh;
    display: flex;
    align-items: center;
    padding-top: 100px;
}

.download-options {
    display: flex;
    flex-wrap: wrap;
    gap: 30px;
    margin-top: 50px;
}

.download-card {
    flex: 1;
    min-width: 300px;
    background: rgba(255, 68, 68, 0.1);
    border: 2px solid rgba(255, 68, 68, 0.3);
    border-radius: 16px;
    padding: 40px;
    text-align: center;
}

.download-btn {
    display: inline-block;
    background: #ff4444;
    color: white;
    padding: 15px 40px;
    border-radius: 50px;
    font-weight: bold;
    margin-top: 20px;
    transition: all 0.3s ease;
}

.download-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 0 20px rgba(255, 68, 68, 0.5);
}

/* ==================== 币安官网页样式 (深蓝主题) ==================== */
body.official-page {
    background: linear-gradient(135deg, #000000 0%, #001122 100%);
}

.official-page .navbar {
    background-color: rgba(0, 17, 34, 0.95);
    border-bottom: 2px solid #00aaff;
}

.official-page .logo {
    color: #00aaff;
}

.official-page .nav-links a:hover {
    background-color: #00aaff;
    color: #000000;
}

.official-content {
    padding: 120px 0 60px;
}

.info-table {
    width: 100%;
    border-collapse: collapse;
    margin: 40px 0;
}

.info-table th, .info-table td {
    padding: 18px;
    text-align: left;
    border-bottom: 1px solid rgba(0, 170, 255, 0.2);
}

.info-table th {
    background-color: rgba(0, 170, 255, 0.1);
    color: #00aaff;
}

/* ==================== binance下载页样式 (紫橙主题) ==================== */
body.app-page {
    background: linear-gradient(45deg, #000000 0%, #110022 50%, #221100 100%);
}

.app-page .navbar {
    background-color: rgba(34, 0, 68, 0.95);
    border-bottom: 2px solid #aa44ff;
}

.app-page .logo {
    color: #aa44ff;
}

.app-page .nav-links a:hover {
    background-color: #aa44ff;
    color: #000000;
}

.app-showcase {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    padding: 100px 0;
}

.app-features-list {
    list-style-type: none;
}

.app-features-list li {
    padding: 15px 0;
    border-bottom: 1px dashed rgba(170, 68, 255, 0.3);
    position: relative;
    padding-left: 30px;
}

.app-features-list li:before {
    content: "✓";
    color: #aa44ff;
    position: absolute;
    left: 0;
}

/* ==================== 币安资讯页样式 (绿青主题) ==================== */
body.news-page {
    background: linear-gradient(180deg, #000000 0%, #002211 100%);
}

.news-page .navbar {
    background-color: rgba(0, 34, 17, 0.95);
    border-bottom: 2px solid #00ff88;
}

.news-page .logo {
    color: #00ff88;
}

.news-page .nav-links a:hover {
    background-color: #00ff88;
    color: #000000;
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 30px;
    padding: 80px 0;
}

.news-card {
    background: rgba(0, 255, 136, 0.05);
    border-radius: 12px;
    overflow: hidden;
    transition: transform 0.3s ease;
}

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

.news-date {
    color: #00ff88;
    font-size: 0.9rem;
}

/* ==================== 关于我们页样式 (橙褐主题) ==================== */
body.about-page {
    background: linear-gradient(135deg, #000000 0%, #221100 100%);
}

.about-page .navbar {
    background-color: rgba(34, 17, 0, 0.95);
    border-bottom: 2px solid #ff8800;
}

.about-page .logo {
    color: #ff8800;
}

.about-page .nav-links a:hover {
    background-color: #ff8800;
    color: #000000;
}

.team-section {
    padding: 100px 0;
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
    gap: 40px;
    margin-top: 50px;
}

.team-member {
    text-align: center;
}

.member-avatar {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    border: 3px solid #ff8800;
    margin: 0 auto 20px;
    overflow: hidden;
}

/* ==================== 排行榜页样式 (粉紫主题) ==================== */
body.rankings-page {
    background: linear-gradient(225deg, #000000 0%, #220033 100%);
}

.rankings-page .navbar {
    background-color: rgba(34, 0, 51, 0.95);
    border-bottom: 2px solid #ff00aa;
}

.rankings-page .logo {
    color: #ff00aa;
}

.rankings-page .nav-links a:hover {
    background-color: #ff00aa;
    color: #000000;
}

.rankings-table {
    width: 100%;
    margin: 60px 0;
    border-radius: 12px;
    overflow: hidden;
}

.rankings-table th {
    background-color: rgba(255, 0, 170, 0.2);
    padding: 20px;
    text-align: left;
    color: #ff00aa;
}

.rankings-table td {
    padding: 18px 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.rank-number {
    display: inline-block;
    width: 30px;
    height: 30px;
    background: #ff00aa;
    color: black;
    border-radius: 50%;
    text-align: center;
    line-height: 30px;
    font-weight: bold;
    margin-right: 15px;
}

/* ==================== 响应式设计 ==================== */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.5rem;
    }
    
    .nav-links {
        display: none; /* 移动端简化导航 */
    }
    
    .app-showcase {
        grid-template-columns: 1fr;
    }
}