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

body {
    font-family: 'Microsoft YaHei', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    overflow: hidden; /* 隐藏所有滚动条 */
    background: #000;
    color: #fff;
}

/* 加载动画 */
#loading {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: #000;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    transition: opacity 0.5s ease;
}

#loading.hidden {
    opacity: 0;
    pointer-events: none;
}

.loading-content {
    text-align: center;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 20px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* 音乐可视化样式 */
#music-visualizer {
    transition: opacity 0.5s ease;
}

.visualizer-bar {
    transition: height 0.15s ease-out, box-shadow 0.2s ease;
    will-change: height;
    transform-origin: bottom;
}

/* 可视化切换按钮动画 */
#visualizer-toggle {
    animation: floatButton 4s ease-in-out infinite;
}

@keyframes floatButton {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-8px);
    }
}

#visualizer-toggle:active {
    transform: scale(0.9) !important;
}

/* 频谱条渐入动画 */
@keyframes barFadeIn {
    from {
        opacity: 0;
        transform: scaleY(0);
    }
    to {
        opacity: 1;
        transform: scaleY(1);
    }
}

/* Three.js 容器 */
#starfield {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    pointer-events: none;
}

/* 音乐控制按钮 */
#music-control {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 1000;
}

.music-btn {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    border: 2px solid rgba(255, 255, 255, 0.3);
    color: #fff;
    font-size: 24px;
    cursor: pointer;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.music-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: scale(1.1);
}

.music-icon.playing {
    animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* 导航栏 */
.main-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    padding: 20px 50px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 100;
    background: rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(10px);
}

.nav-brand {
    font-size: 24px;
    font-weight: bold;
    color: #fff;
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.5);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-link {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    font-size: 16px;
    transition: all 0.3s ease;
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: #fff;
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.8);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: #fff;
    transition: width 0.3s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 100%;
}

/* 主内容区 */
.main-content {
    position: relative;
    z-index: 10;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 100px 20px 50px;
}

/* 英雄区域 */
.hero-section {
    text-align: center;
    margin-bottom: 100px;
    animation: fadeInUp 1s ease;
}

.hero-title {
    font-size: 64px;
    font-weight: bold;
    margin-bottom: 20px;
    text-shadow: 0 0 20px rgba(255, 255, 255, 0.5);
    animation: glow 2s ease-in-out infinite;
}

@keyframes glow {
    0%, 100% { text-shadow: 0 0 20px rgba(255, 255, 255, 0.5); }
    50% { text-shadow: 0 0 30px rgba(255, 255, 255, 0.8); }
}

.hero-subtitle {
    font-size: 24px;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 40px;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
}

.hero-buttons .btn {
    padding: 12px 30px;
    border-radius: 30px;
    transition: all 0.3s ease;
}

.hero-buttons .btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 20px rgba(255, 255, 255, 0.2);
}

/* 简介卡片 */
.intro-card {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    padding: 40px;
    max-width: 600px;
    animation: fadeInUp 1s ease 0.3s both;
}

.intro-card h2 {
    margin-bottom: 20px;
    font-size: 32px;
}

.intro-card p {
    font-size: 18px;
    line-height: 1.6;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: 30px;
}

.social-links {
    display: flex;
    gap: 20px;
    justify-content: center;
}

.social-icon {
    padding: 10px 20px;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    color: #fff;
    text-decoration: none;
    transition: all 0.3s ease;
}

.social-icon:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: translateY(-3px);
    color: #fff;
}

/* 流星效果容器 */
#shooting-stars {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 5;
    overflow: hidden;
}

/* 动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .main-nav {
        padding: 15px 20px;
    }
    
    .nav-menu {
        gap: 15px;
    }
    
    .hero-title {
        font-size: 36px;
    }
    
    .hero-subtitle {
        font-size: 18px;
    }
    
    .hero-buttons {
        flex-direction: column;
    }
    
    .intro-card {
        padding: 30px 20px;
    }
}