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

/* 颜色变量 */
:root {
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.85);
    --bg-primary: #000000;
    --bg-gradient: linear-gradient(135deg, #000000 0%, #1a1a1a 50%, #000000 100%);
    --accent-primary: #10b981;
    --accent-secondary: #06b6d4;
    --accent-gradient: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    --border-color: rgba(255, 255, 255, 0.1);
    --shadow-md: 0 8px 24px rgba(16, 185, 129, 0.15);
    --shadow-lg: 0 16px 32px rgba(16, 185, 129, 0.2);
    --shadow-xl: 0 24px 48px rgba(16, 185, 129, 0.25);
    --transition-normal: 0.4s ease;
    --transition-slow: 0.8s ease;
    --spacing-2xl: 64px;
    --spacing-xl: 48px;
    --spacing-lg: 32px;
    --spacing-md: 24px;
    --spacing-sm: 16px;
    --spacing-xs: 8px;
    --border-radius-sm: 8px;
    --border-radius-md: 12px;
    --border-radius-lg: 20px;
}

html, body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--bg-gradient);
    overflow-x: hidden;
    overflow-y: auto;
    height: 100vh;
    font-weight: 300;
    letter-spacing: 0.2px;
    /* Firefox */
    scrollbar-width: none;
    /* IE and Edge */
    -ms-overflow-style: none;
}

/* Chrome, Safari and Opera */
html::-webkit-scrollbar,
body::-webkit-scrollbar {
    display: none;
}

/* 导航栏样式 */
header {
    background: rgba(0, 0, 0, 0.95);
    backdrop-filter: blur(20px) saturate(150%);
    -webkit-backdrop-filter: blur(20px) saturate(150%);
    box-shadow: 0 2px 32px rgba(0, 0, 0, 0.2);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 9999;
    transition: all var(--transition-normal);
    border-bottom: 1px solid var(--border-color);
}

header:hover {
    background: rgba(0, 0, 0, 0.98);
    box-shadow: 0 4px 40px rgba(0, 0, 0, 0.3);
}

.nav-container {
    display: flex;
    justify-content: center;
    align-items: center;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
    height: 80px;
    gap: var(--spacing-2xl);
}

.logo h1 {
            font-size: 26px;
            font-weight: 900;
            color: #ffffff;
            letter-spacing: 1px;
            text-transform: uppercase;
            transition: all var(--transition-normal);
        }

.logo:hover h1 {
    transform: scale(1.02);
    filter: brightness(1.1);
}

nav ul {
    display: flex;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: var(--spacing-xl);
}

nav ul li {
    margin: 0;
}

nav ul li a {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 400;
    font-size: 15px;
    transition: all var(--transition-normal);
    position: relative;
    padding: 12px 0;
    letter-spacing: 0.3px;
}

nav ul li a:hover {
    color: var(--text-primary);
}

nav ul li a::after {
    content: '';
    position: absolute;
    bottom: 8px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--accent-gradient);
    transition: width var(--transition-normal);
}

nav ul li a:hover::after {
    width: 100%;
}

nav ul li a.active {
    color: var(--text-primary);
}

nav ul li a.active::after {
    width: 100%;
}

/* 主英雄区域 */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: var(--bg-primary);
    padding: 100px var(--spacing-xl);
    text-align: center;
}

/* 星空背景容器 */
.stars-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: 1;
    background: transparent;
}



/* 星云流动动画 */
@keyframes nebulaFlow {
    0%, 100% {
        transform: scale(1) rotate(0deg);
    }
    33% {
        transform: scale(1.05) rotate(120deg);
    }
    66% {
        transform: scale(0.95) rotate(240deg);
    }
}

/* 旋转动画 */
@keyframes rotate {
    0% { transform: rotate(0deg) scale(1.05); }
    100% { transform: rotate(360deg) scale(1.05); }
}

/* 英雄区域中心内容 */
        .hero-center {
            text-align: center;
            padding: var(--spacing-lg) var(--spacing-md);
            z-index: 5;
            position: relative;
            max-width: 900px;
            margin: 0 auto;
            width: 100%;
        }

        /* 功能按钮区域 */
        .feature-buttons {
            display: grid;
            grid-template-columns: repeat(4, 1fr);
            gap: 24px;
            margin-top: 48px;
            width: 100%;
            max-width: 1000px;
            margin-left: auto;
            margin-right: auto;
        }

        /* 功能按钮样式 */
        .feature-btn {
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: flex-end;
            padding: 0 24px 24px;
            background: white;
            border: none;
            border-radius: 20px;
            color: #2d3748;
            text-decoration: none;
            font-weight: 600;
            font-size: 1.1rem;
            transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            animation: fadeInUp 0.8s ease-out forwards;
            opacity: 0;
            box-shadow: 0 10px 30px rgba(0, 0, 0, 0.12), 0 4px 15px rgba(0, 0, 0, 0.08);
            min-height: 220px;
            position: relative;
            overflow: hidden;
            backdrop-filter: blur(10px);
        }

        .feature-btn::before {
            content: '';
            position: absolute;
            top: 0;
            left: 0;
            right: 0;
            height: 120px;
            background: var(--accent-gradient);
            z-index: 1;
            transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        }

        .feature-btn span {
            position: relative;
            z-index: 3;
            margin-bottom: 8px;
            font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
            letter-spacing: 0.3px;
        }

        .feature-btn:nth-child(1) {
            animation-delay: 0.4s;
        }

        .feature-btn:nth-child(2) {
            animation-delay: 0.5s;
        }

        .feature-btn:nth-child(3) {
            animation-delay: 0.6s;
        }

        .feature-btn:nth-child(4) {
            animation-delay: 0.7s;
        }

        /* 功能按钮图标容器 */
        .feature-btn i {
            font-size: 2.2rem;
            margin-bottom: 24px;
            width: 90px;
            height: 90px;
            display: flex;
            align-items: center;
            justify-content: center;
            border-radius: 50%;
            background: white;
            transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
            position: relative;
            z-index: 2;
            margin-top: -45px;
            box-shadow: 0 8px 20px rgba(0, 0, 0, 0.18), 0 4px 12px rgba(0, 0, 0, 0.12);
            border: 3px solid rgba(255, 255, 255, 0.95);
        }

        /* 公开日志按钮样式 - 渐变橘黄 */
        .btn-logs::before {
            background: linear-gradient(135deg, #ff8a00, #ffd700);
        }
        .btn-logs i {
            color: #ff8a00;
        }
        .btn-logs:hover::before {
            background: linear-gradient(135deg, #ff9f43, #ffeaa7);
        }

        /* 商城按钮样式 - 渐变天蓝 */
        .btn-mall::before {
            background: linear-gradient(135deg, #00b0ff, #00e5ff);
        }
        .btn-mall i {
            color: #00b0ff;
        }
        .btn-mall:hover::before {
            background: linear-gradient(135deg, #4fc3f7, #b3e5fc);
        }

        /* 主播中心按钮样式 - 渐变粉 */
        .btn-streamer::before {
            background: linear-gradient(135deg, #ec407a, #f06292);
        }
        .btn-streamer i {
            color: #ec407a;
        }
        .btn-streamer:hover::before {
            background: linear-gradient(135deg, #f48fb1, #f8bbd0);
        }

        /* 后台管理按钮样式 - 渐变紫色 */
        .btn-admin::before {
            background: linear-gradient(135deg, #7e57c2, #9575cd);
        }
        .btn-admin i {
            color: #7e57c2;
        }
        .btn-admin:hover::before {
            background: linear-gradient(135deg, #b39ddb, #d1c4e9);
        }

        .feature-btn:hover {
            transform: translateY(-8px) scale(1.02);
            box-shadow: 0 20px 40px rgba(0, 0, 0, 0.15), 0 8px 20px rgba(0, 0, 0, 0.1);
        }

        .feature-btn:hover i {
            transform: scale(1.1) rotate(5deg);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2), 0 6px 15px rgba(0, 0, 0, 0.15);
        }

        .feature-btn:active {
            transform: translateY(-3px) scale(0.98);
            box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15), 0 5px 15px rgba(0, 0, 0, 0.1);
        }

        .feature-btn:active i {
            transform: scale(0.95);
        }

        /* 响应式设计 */
        @media (max-width: 1024px) {
            .feature-buttons {
                grid-template-columns: repeat(2, 1fr);
                max-width: 600px;
                gap: 20px;
            }
            
            .feature-btn {
                min-height: 180px;
                padding: 0 20px 20px;
            }
            
            .feature-btn::before {
                height: 100px;
            }
            
            .feature-btn i {
                width: 75px;
                height: 75px;
                font-size: 1.8rem;
                margin-top: -37px;
            }
            
            .feature-btn span {
                font-size: 1rem;
            }
        }

        @media (max-width: 768px) {
            .feature-buttons {
                grid-template-columns: 1fr;
                max-width: 300px;
                gap: 20px;
            }
            
            .feature-btn {
                min-height: 180px;
                padding: 0 16px 16px;
            }
        }

.hero-center h1 {
            font-size: clamp(2rem, 6vw, 3.5rem);
            font-weight: 900;
            margin-bottom: var(--spacing-md);
            color: white;
            letter-spacing: -0.5px;
            line-height: 1.1;
            animation: fadeInUp 1s ease-out;
            display: inline-block;
            margin: 0 auto var(--spacing-md);
        }

.hero-center p {
            font-size: clamp(0.9rem, 2vw, 1.2rem);
            color: var(--text-secondary);
            max-width: 700px;
            margin: 0 auto;
            line-height: 1.6;
            animation: fadeInUp 1s ease-out 0.3s both;
            font-weight: 600;
        }

/* 淡入上移动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}



/* 响应式设计 */

/* 平板设备 */
@media (max-width: 1024px) {
    .nav-container {
        max-width: 100%;
        padding: 0 var(--spacing-lg);
        gap: var(--spacing-xl);
    }
    
    nav ul {
        gap: var(--spacing-lg);
    }
    
    .hero {
        padding: 100px var(--spacing-lg);
    }
    
    .hero-center {
        padding: var(--spacing-lg) var(--spacing-md);
    }
    
    .feature-buttons {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }
    
    .feature-btn {
        padding: var(--spacing-md);
    }
    
    .feature-btn i {
        font-size: 2rem;
    }
}

/* 移动设备 */
@media (max-width: 768px) {
    header {
        background: rgba(0, 0, 0, 0.98);
    }
    
    .nav-container {
        flex-direction: column;
        height: auto;
        padding: var(--spacing-md) var(--spacing-sm);
        gap: var(--spacing-sm);
    }
    
    nav ul {
        margin-top: var(--spacing-xs);
        gap: var(--spacing-md);
    }
    
    nav ul li a {
        font-size: 14px;
        padding: 8px 0;
    }
    
    .hero {
        padding: 120px var(--spacing-md) var(--spacing-lg);
    }
    
    .hero-center {
        padding: var(--spacing-lg) var(--spacing-md);
        margin: 0 auto;
        width: 95%;
    }
    
    .hero-center h1 {
        margin-bottom: var(--spacing-md);
        font-weight: 800;
    }
    
    .feature-buttons {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .feature-btn {
        padding: var(--spacing-md);
    }
    
    .feature-btn i {
        font-size: 1.8rem;
    }
}

/* 小屏移动设备 */
@media (max-width: 480px) {
    .nav-container {
        padding: var(--spacing-sm);
    }
    
    nav ul {
        gap: var(--spacing-sm);
    }
    
    nav ul li a {
        font-size: 13px;
    }
    
    .hero {
        padding: 100px var(--spacing-sm);
    }
    
    .hero-center {
        padding: var(--spacing-md) var(--spacing-sm);
    }
    
    .hero-center h1 {
        font-size: 2rem;
        margin-bottom: var(--spacing-sm);
        line-height: 1.2;
        font-weight: 800;
    }
    
    .hero-center p {
        font-size: 0.9rem;
        line-height: 1.7;
    }
    
    .feature-buttons {
        grid-template-columns: 1fr;
        gap: var(--spacing-sm);
        margin-top: var(--spacing-lg);
    }
    
    .feature-btn {
        padding: var(--spacing-md);
        font-size: 1rem;
    }
    
    .feature-btn i {
        font-size: 1.8rem;
        margin-bottom: var(--spacing-xs);
    }
}