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

:root {
    --primary: #1a1a1a;
    --accent: #000;
    --light: #fafafa;
    --gray: #666;
    --border: #eee;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--light);
    color: var(--primary);
    line-height: 1.6;
}

/* 电脑端 - 左右分栏 */
.container {
    display: grid;
    grid-template-columns: 260px 1fr;
    min-height: 100vh;
}

.sidebar {
    background: var(--primary);
    color: #fff;
    padding: 50px 25px;
    position: sticky;
    top: 0;
    height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.avatar {
    width: 90px;
    height: 90px;
    border-radius: 50%;
    object-fit: cover;
    margin-bottom: 20px;
    border: 2px solid rgba(255,255,255,0.2);
}

.sidebar h1 {
    font-size: 1.25rem;
    font-weight: 500;
    margin-bottom: 6px;
    letter-spacing: 1px;
}

.sidebar .subtitle {
    font-size: 0.8rem;
    opacity: 0.5;
    font-weight: 300;
}

.contact-info {
    margin-top: auto;
    padding-top: 30px;
}

.contact-item {
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.contact-item svg {
    width: 14px;
    height: 14px;
    opacity: 0.5;
}

.contact-item a {
    color: rgba(255,255,255,0.6);
    text-decoration: none;
    font-size: 0.8rem;
    transition: color 0.2s;
}

.contact-item a:hover {
    color: #fff;
}

.main {
    padding: 60px 50px;
    max-width: 600px;
}

.section {
    margin-bottom: 45px;
}

.section-title {
    font-size: 0.65rem;
    text-transform: uppercase;
    letter-spacing: 3px;
    color: var(--gray);
    margin-bottom: 18px;
    font-weight: 500;
}

.edu-item h3 {
    font-size: 1rem;
    font-weight: 500;
    margin-bottom: 4px;
}

.edu-item .detail {
    color: var(--gray);
    font-size: 0.85rem;
}

.project-item {
    margin-bottom: 15px;
}

.project-item:last-child {
    margin-bottom: 0;
}

.project-item h3 {
    font-size: 1rem;
    font-weight: 500;
    margin-bottom: 4px;
}

.project-item h3 a {
    color: var(--primary);
    text-decoration: none;
    border-bottom: 1px solid var(--border);
    transition: border-color 0.2s;
}

.project-item h3 a:hover {
    border-color: var(--primary);
}

.project-item .detail {
    color: var(--gray);
    font-size: 0.85rem;
}

.skills {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.skill {
    background: #fff;
    border: 1px solid var(--border);
    padding: 5px 12px;
    font-size: 0.8rem;
    color: var(--gray);
}

.about p {
    color: var(--gray);
    font-size: 0.9rem;
    line-height: 1.8;
}

.footer {
    position: fixed;
    bottom: 20px;
    left: 260px;
    right: 0;
    text-align: center;
}

.footer a {
    color: #bbb;
    text-decoration: none;
    font-size: 0.7rem;
    letter-spacing: 0.5px;
    transition: color 0.2s;
}

.footer a:hover {
    color: var(--gray);
}

/* 手机端 - 卡片式 */
@media (max-width: 768px) {
    .container {
        display: block;
    }

    .sidebar {
        position: relative;
        height: auto;
        padding: 50px 20px 40px;
        background: var(--primary);
    }

    .avatar {
        width: 70px;
        height: 70px;
        margin-bottom: 15px;
    }

    .sidebar h1 {
        font-size: 1.1rem;
    }

    .contact-info {
        margin-top: 25px;
        padding-top: 0;
    }

    .main {
        padding: 20px 16px;
    }

    .section {
        background: #fff;
        padding: 22px 20px;
        margin-bottom: 12px;
        border: 1px solid var(--border);
    }

    .section-title {
        margin-bottom: 14px;
    }

    .skill {
        background: var(--light);
        border: none;
    }

    .footer {
        position: static;
        margin-top: 30px;
        padding: 20px 0;
    }
}