/* 高级色彩与字体定义 */
:root {
    --color-primary: #121212; /* 高级黑 */
    --color-secondary: #f0f0f0; /* 柔和白 */
    --color-accent: #8b5e3c; /* 焦糖色 */
    --color-text: #4a4a4a; /* 高级灰 */
    --font-heading: 'Montserrat', sans-serif;
    --font-body: 'Noto Serif SC', serif;
}

body {
    font-family: var(--font-body);
    color: var(--color-text);
    background-color: var(--color-secondary);
    margin: 0;
    line-height: 1.6;
    scroll-behavior: smooth;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 40px;
}

h1, h2 {
    font-family: var(--font-heading);
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 2px;
}

/* 导航栏 */
.main-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background-color: rgba(255, 255, 255, 0.9);
    padding: 20px 0;
    z-index: 1000;
    box-shadow: 0 2px 10px rgba(0,0,0,0.05);
}

.main-nav {
    display: flex;
    justify-content: center;
    gap: 40px;
}

.main-nav a {
    color: var(--color-text);
    font-weight: 700;
    transition: color 0.3s;
    text-decoration: none;
    position: relative;
}

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

/* Hero区域 */
.hero-section {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background-color: var(--color-primary);
    color: var(--color-secondary);
    padding-top: 80px;
}

.hero-content h1 {
    font-size: 5em;
    margin: 0;
    letter-spacing: 5px;
}

.tagline {
    font-family: var(--font-body);
    font-size: 1.5em;
    margin-top: 10px;
}

.divider {
    width: 80px;
    height: 3px;
    background-color: var(--color-accent);
    margin: 20px auto 0;
}

/* 通用部分样式 */
.section {
    padding: 80px 0;
}

h2 {
    text-align: center;
    margin-bottom: 60px;
    font-size: 2.5em;
}

/* 关于我 */
.about-section {
    background-color: var(--color-secondary);
}

.about-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 80px;
    align-items: center;
}

.profile-pic {
    width: 100%;
    height: auto;
    object-fit: cover;
    box-shadow: 15px 15px 0px rgba(139, 94, 60, 0.5); /* 焦糖色阴影 */
}

/* 作品集 */
.portfolio-section {
    background-color: var(--color-primary);
    color: var(--color-secondary);
}

.portfolio-section h2 {
    color: var(--color-secondary);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
}

.project-card {
    position: relative;
    overflow: hidden;
    cursor: pointer;
}

.project-card img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.5s;
}

.project-card:hover img {
    transform: scale(1.05);
}

.overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.8), rgba(0,0,0,0));
    color: var(--color-secondary);
    padding: 20px;
    transform: translateY(100%);
    transition: transform 0.5s;
}

.project-card:hover .overlay {
    transform: translateY(0);
}

/* 经历与技能 */
.experience-section {
    background-color: var(--color-secondary);
}

.experience-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.job-item {
    margin-bottom: 40px;
}

.job-item h3 {
    font-size: 1.5em;
    margin-bottom: 5px;
}

.timeline {
    font-style: italic;
    color: #888;
}

.skills-list h3 {
    font-size: 1.8em;
    margin-bottom: 20px;
}

.skills-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
}

.skills-grid span {
    background-color: var(--color-primary);
    color: var(--color-secondary);
    padding: 10px 20px;
    border-radius: 5px;
    font-weight: 700;
}

/* 联系方式 */
.contact-section {
    text-align: center;
    padding: 80px 0;
}

.email-link {
    font-size: 1.5em;
    font-weight: 700;
    color: var(--color-accent);
    text-decoration: none;
    transition: color 0.3s;
    margin-top: 20px;
    display: inline-block;
}

.email-link:hover {
    color: #b07c4b;
}

.social-links {
    margin-top: 20px;
}

.social-links a {
    color: var(--color-text);
    font-size: 1em;
    margin: 0 15px;
    font-weight: 700;
}

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

/* 页脚 */
.main-footer {
    text-align: center;
    padding: 30px 0;
    background-color: var(--color-primary);
    color: var(--color-secondary);
    font-size: 0.9em;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .container {
        padding: 0 20px;
    }
    .hero-content h1 {
        font-size: 3em;
    }
    .tagline {
        font-size: 1.2em;
    }
    .about-grid, .experience-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    .profile-pic {
        width: 60%;
        margin: auto;
    }
    .portfolio-grid {
        grid-template-columns: 1fr;
    }
}