:root {
    --primary: #ff6b00;
    --primary-hover: #e05a00;
    --secondary: #2c3e50;
    --accent: #3498db;
    --dark: #1a1a2e;
    --darker: #16213e;
    --light: #f8f9fa;
    --gray: #6c757d;
    --success: #2ecc71;
    --warning: #f39c12;
    --danger: #e74c3c;
    --text: #e6e6e6;
    --text-dark: #333333;
    --border-radius: 8px;
    --box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

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

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--dark);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
}

ul {
    list-style: none;
}

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

h1, h2, h3, h4, h5, h6 {
    margin-bottom: 1rem;
    line-height: 1.3;
}

h1 {
    font-size: 3.5rem;
    font-weight: 700;
}

h2 {
    font-size: 2.5rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
}

h3 {
    font-size: 1.75rem;
    font-weight: 600;
}

p {
    margin-bottom: 1rem;
}

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

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    text-align: center;
}

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

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(255, 107, 0, 0.2);
}

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

.btn-outline:hover {
    background-color: var(--primary);
    color: white;
    transform: translateY(-3px);
}

.btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.1rem;
}

/* 侧边导航栏 */
.side-nav {
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    width: 250px;
    background-color: var(--darker);
    padding: 2rem 0;
    display: flex;
    flex-direction: column;
    z-index: 1000;
    transition: transform 0.4s ease;
}

.logo-wrapper {
    padding: 0 1.5rem;
    margin-bottom: 2rem;
}

.logo {
    width: 120px;
    height: auto;
}

.nav-links {
    margin-bottom: auto;
}

.nav-links li {
    margin-bottom: 0.5rem;
}

.nav-links a {
    display: block;
    padding: 0.75rem 1.5rem;
    color: var(--text);
    font-weight: 500;
    transition: var(--transition);
    border-left: 3px solid transparent;
}

.nav-links a:hover,
.nav-links a.active {
    background-color: rgba(255, 107, 0, 0.1);
    color: var(--primary);
    border-left-color: var(--primary);
}

.nav-buttons {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

/* 移动端菜单按钮 */
.mobile-menu-toggle {
    display: none;
    position: fixed;
    top: 1rem;
    right: 1rem;
    width: 40px;
    height: 40px;
    background-color: var(--darker);
    border-radius: 50%;
    z-index: 1001;
    cursor: pointer;
    padding: 10px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.mobile-menu-toggle span {
    display: block;
    width: 100%;
    height: 3px;
    background-color: var(--primary);
    margin: 5px 0;
    transition: var(--transition);
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

/* 主内容区 */
.main-content {
    margin-left: 250px;
    padding: 2rem;
    min-height: 100vh;
}

/* 英雄区域 */
.hero-section {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 4rem 0;
    gap: 2rem;
}

.hero-content {
    flex: 1;
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--gray);
}

.hero-description {
    margin-bottom: 2rem;
}

.hero-description p {
    margin-bottom: 1rem;
    font-size: 1.1rem;
    line-height: 1.6;
}

.hero-features {
    list-style: none;
    margin: 1.5rem 0;
    padding: 0;
}

.hero-features li {
    margin-bottom: 0.75rem;
    font-size: 1.05rem;
    display: flex;
    align-items: center;
}

.feature-check {
    color: var(--primary);
    font-weight: bold;
    margin-right: 0.75rem;
    font-size: 1.2rem;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

.hero-image {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-image img {
    max-width: 100%;
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

/* 特色区域 */
.features-section {
    padding: 4rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-header p {
    color: var(--gray);
    font-size: 1.1rem;
    max-width: 600px;
    margin: 0 auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.feature-card {
    background-color: var(--darker);
    border-radius: var(--border-radius);
    padding: 2rem;
    transition: var(--transition);
    box-shadow: var(--box-shadow);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
}

.feature-icon {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.feature-card h3 {
    margin-bottom: 1rem;
}

.feature-card p {
    color: var(--gray);
}

/* 奖金区域 */
.bonus-section {
    padding: 4rem 0;
}

.bonus-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.bonus-card {
    background-color: var(--darker);
    border-radius: var(--border-radius);
    padding: 2rem;
    text-align: center;
    position: relative;
    transition: var(--transition);
    box-shadow: var(--box-shadow);
}

.bonus-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.2);
}

.bonus-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background-color: var(--primary);
    color: white;
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}

.bonus-value {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--primary);
    margin: 1rem 0;
}

.bonus-desc {
    color: var(--gray);
    margin-bottom: 1.5rem;
}

/* 关于区域 */
.about-section {
    padding: 4rem 0;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.about-text p {
    margin-bottom: 1.5rem;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 2rem;
}

.stat-item {
    text-align: center;
    padding: 1.5rem;
    background-color: var(--darker);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

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

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--gray);
    font-weight: 500;
}

/* 注册区域 */
.cta-section {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    border-radius: var(--border-radius);
    padding: 4rem 2rem;
    text-align: center;
    margin: 4rem 0;
}

.cta-content h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    color: white;
}

.cta-content p {
    color: rgba(255, 255, 255, 0.9);
    font-size: 1.1rem;
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-section .btn-primary {
    background-color: white;
    color: var(--primary);
}

.cta-section .btn-primary:hover {
    background-color: var(--light);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

/* 页脚 */
.footer {
    background-color: var(--darker);
    padding-top: 4rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 3rem;
    padding: 0 2rem 3rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-logo {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.footer-logo .logo {
    width: 120px;
    margin-bottom: 1.5rem;
}

.footer-logo p {
    color: var(--gray);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.footer-column h4 {
    color: white;
    margin-bottom: 1.5rem;
    font-size: 1.1rem;
}

.footer-column ul li {
    margin-bottom: 0.75rem;
}

.footer-column ul li a {
    color: var(--gray);
    transition: var(--transition);
}

.footer-column ul li a:hover {
    color: var(--primary);
    padding-left: 5px;
}

.footer-bottom {
    padding: 1.5rem 2rem;
    text-align: center;
}

.footer-bottom p {
    color: var(--gray);
    font-size: 0.9rem;
    margin: 0;
}

/* 动画效果 */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

.scroll-reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.scroll-reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 响应式设计 */
@media (max-width: 1200px) {
    .hero-section {
        flex-direction: column;
    }
    
    .hero-content, .hero-image {
        width: 100%;
        text-align: center;
    }
    
    .hero-cta {
        justify-content: center;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

@media (max-width: 992px) {
    h1 {
        font-size: 2.8rem;
    }
    
    h2 {
        font-size: 2.2rem;
    }
    
    .side-nav {
        transform: translateX(-100%);
    }
    
    .side-nav.active {
        transform: translateX(0);
    }
    
    .mobile-menu-toggle {
        display: block;
    }
    
    .nav-buttons {
        display: none; /* 在移动设备上隐藏侧边导航栏中的按钮 */
    }
    
    .main-content {
        margin-left: 0;
        padding: 1.5rem;
        padding-bottom: 80px; /* 为底部按钮留出空间 */
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    h1 {
        font-size: 2.5rem;
    }
    
    h2 {
        font-size: 2rem;
    }
    
    .features-grid, .bonus-cards {
        grid-template-columns: 1fr;
    }
    
    .about-stats {
        grid-template-columns: 1fr 1fr;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .hero-description p {
        font-size: 1rem;
    }
    
    .hero-features li {
        font-size: 0.95rem;
    }
}

@media (max-width: 576px) {
    h1 {
        font-size: 2.2rem;
    }
    
    h2 {
        font-size: 1.8rem;
    }
    
    .hero-cta {
        flex-direction: column;
        gap: 1rem;
    }
    
    .btn {
        width: 100%;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
    }
    
    .hero-description {
        text-align: left;
    }
}

/* 移动端底部漂浮按钮 - 新样式 */
.mobile-floating-buttons {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background-color: #16213e;
    padding: 10px;
    z-index: 9999;
    box-shadow: 0 -2px 10px rgba(0, 0, 0, 0.3);
}

@media (max-width: 992px) {
    .mobile-floating-buttons {
        display: flex;
        justify-content: space-between;
    }
}

.floating-btn {
    flex: 1;
    text-align: center;
    padding: 15px 0;
    font-weight: 700;
    border-radius: 8px;
    transition: all 0.3s ease;
    margin: 0 5px;
    text-decoration: none;
    font-size: 16px;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.btn-entrar {
    background-color: transparent;
    border: 2px solid #ff6b00;
    color: #ff6b00;
}

.btn-registro {
    background-color: #ff6b00;
    color: white;
}