:root {
    --primary: #FF0080;
    --secondary: #7928CA;
    --accent: #46c5ff;
    --dark: #120024;
    --darker: #004dc0;
    --text: #ffffff;
    --glass: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
}

body {
    background: linear-gradient(180deg, var(--dark) 0%, #2a0a3d 40%, #1a0525 70%, var(--darker) 100%);
    color: var(--text);
    overflow-x: clip;
    min-height: 100vh;
}

/* 滚动条美化 */
::-webkit-scrollbar {
    width: 8px;
}
::-webkit-scrollbar-track {
    background: var(--dark);
}
::-webkit-scrollbar-thumb {
    background: linear-gradient(var(--primary), var(--secondary));
    border-radius: 4px;
}

/* 导航栏 */
nav {
    position: fixed;
    top: 0;
    width: 100%;
    padding: 1.5rem 5%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    z-index: 1000;
    backdrop-filter: blur(10px);
    background: rgba(18, 0, 36, 0.5);
    border-bottom: 1px solid var(--glass-border);
    transition: 0.3s;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    background: linear-gradient(to right, var(--primary), var(--accent));
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.nav-links a {
    color: var(--text);
    text-decoration: none;
    margin-left: 2rem;
    font-weight: 500;
    transition: 0.3s;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: 0.3s;
}

.nav-links a:hover::after {
    width: 100%;
}

/* 通用动画类 */
.reveal {
    opacity: 0;
    transform: translateY(50px);
    transition: all 1s cubic-bezier(0.165, 0.84, 0.44, 1);
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* 玻璃卡片通用样式 */
.card {
    background: var(--glass);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 2rem;
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow);
    transition: transform 0.1s ease-out, box-shadow 0.4s ease, border-color 0.4s ease;
    transform-style: preserve-3d;
    perspective: 1000px;
    position: relative;
    overflow: hidden;
}

.card:hover {
    border-color: rgba(255, 255, 255, 0.4);
    box-shadow: 0 0 30px rgba(70, 197, 255, 0.3), 
                inset 0 0 15px rgba(255, 255, 255, 0.1);
}

/* 背景装饰球 */
.bg-orb {
    position: fixed;
    border-radius: 50%;
    filter: blur(80px);
    z-index: -1;
    opacity: 0.4;
    pointer-events: none;
    transition: transform 0.2s ease-out;
}

/* 打字机光标 */
.cursor {
    display: inline-block;
    width: 40px;
    height: 10px;
    margin-bottom: -50px;
    background: #ffffff;
    margin-left: 5px;
    animation: blink 1s step-end infinite;
    box-shadow: 0 0 8px var(--primary);
}

@keyframes blink {
    from, to { opacity: 1; }
    50% { opacity: 0; }
}

@keyframes color_shift {
    from  { background-color: green; }
    0%, 10% { background-color: #1e052a; }
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@keyframes reverse-spin {
    0% { transform: translate(-50%, -50%) rotate(360deg); }
    100% { transform: translate(-50%, -50%) rotate(0deg); }
}

/* White-out Transition Overlay */
#transition-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: white;
    z-index: 9999;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.8s ease-in-out;
}

#transition-overlay.active {
    opacity: 1;
}