:root {
    --bg-color: #0a0a0a;
    --text-primary: #f0f0f0;
    --text-secondary: #888;
    --accent-color: #00ffcc;
    --accent-hover: #00ccaa;
    --card-bg: #111;
    --border-color: #333;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
}

/* 导航栏 */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 2rem 5%;
    position: fixed;
    width: 100%;
    top: 0;
    background: rgba(10, 10, 10, 0.8);
    backdrop-filter: blur(10px);
    z-index: 1000;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    letter-spacing: 2px;
}

.logo span {
    color: var(--accent-color);
    animation: blink 1s step-end infinite;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-primary);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

.nav-links a:hover {
    color: var(--accent-color);
}

/* 头部 Hero 区域 */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    padding: 0 5%;
    background: radial-gradient(circle at center, #1a1a2e 0%, var(--bg-color) 100%);
}

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

.glitch {
    font-size: 4rem;
    font-weight: 800;
    text-transform: uppercase;
    position: relative;
    margin-bottom: 1rem;
}

.typewriter {
    font-size: 1.2rem;
    color: var(--text-secondary);
    min-height: 30px;
    margin-bottom: 2rem;
}

/* 按钮样式 */
.btn {
    padding: 0.8rem 2rem;
    text-decoration: none;
    font-weight: 600;
    border-radius: 4px;
    transition: all 0.3s ease;
    display: inline-block;
    margin-right: 1rem;
}

.primary {
    background-color: var(--accent-color);
    color: var(--bg-color);
    box-shadow: 0 0 15px rgba(0, 255, 204, 0.3);
}

.primary:hover {
    background-color: var(--accent-hover);
    box-shadow: 0 0 25px rgba(0, 255, 204, 0.6);
}

.secondary {
    background-color: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.secondary:hover {
    border-color: var(--accent-color);
    color: var(--accent-color);
}

/* 项目展示区 */
.portfolio {
    padding: 100px 5%;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 3rem;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 0;
    width: 50%;
    height: 3px;
    background: var(--accent-color);
}

.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 2rem;
    transition: transform 0.3s ease, border-color 0.3s ease;
    cursor: pointer;
}

.card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-color);
    box-shadow: 0 10px 30px rgba(0, 255, 204, 0.1);
}

.card h3 {
    margin-bottom: 1rem;
    font-size: 1.5rem;
}

.card p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
}

.tag {
    display: inline-block;
    padding: 0.3rem 0.8rem;
    background: rgba(0, 255, 204, 0.1);
    color: var(--accent-color);
    font-size: 0.8rem;
    border-radius: 20px;
    margin-right: 0.5rem;
    margin-bottom: 0.5rem;
}

/* 动画 */
@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}