/* 重置样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* 基础样式 */
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    color: #000;
    background-color: #fff;
    line-height: 1.6;
    font-size: 16px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: #fff;
    border-bottom: 1px solid #000;
    z-index: 1000;
    transition: transform 0.3s ease;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 64px;
}

.nav-logo a {
    font-size: 24px;
    font-weight: 700;
    color: #000;
    text-decoration: none;
}

.nav-menu {
    display: flex;
    gap: 32px;
}

.nav-link {
    color: #000;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
}

.nav-link:hover {
    color: #666;
}

.menu-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
}

.menu-toggle span {
    width: 24px;
    height: 2px;
    background-color: #000;
    transition: all 0.3s ease;
}

/* 主页部分 */
.hero {
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background-color: #fff;
}

.hero-content h1 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 16px;
    color: #000;
}

.hero-content p {
    font-size: 20px;
    margin-bottom: 32px;
    color: #666;
}

.btn {
    display: inline-block;
    padding: 16px 32px;
    background-color: #000;
    color: #fff;
    text-decoration: none;
    border: 1px solid #000;
    transition: all 0.2s ease;
    font-weight: 500;
}

.btn:hover {
    background-color: #fff;
    color: #000;
}

/* 关于部分 */
.about {
    padding: 80px 0;
    background-color: #fff;
}

.about h2 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 48px;
    text-align: center;
    color: #000;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: start;
}

.about-text p {
    margin-bottom: 16px;
    color: #000;
}

.about-skills h3 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 24px;
    color: #000;
}

.skill-item {
    margin-bottom: 16px;
}

.skill-item span {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #000;
}

.skill-bar {
    width: 100%;
    height: 8px;
    background-color: #f0f0f0;
    border: 1px solid #000;
}

.skill-progress {
    height: 100%;
    background-color: #000;
    transition: width 0.3s ease;
}

/* 作品集部分 */
.portfolio {
    padding: 80px 0;
    background-color: #f8f8f8;
}

.portfolio h2 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 48px;
    text-align: center;
    color: #000;
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
}

.portfolio-item {
    background-color: #fff;
    border: 1px solid #000;
    transition: transform 0.2s ease;
}

.portfolio-item:hover {
    transform: translateY(-4px);
}

.portfolio-image {
    width: 100%;
    height: 200px;
    border-bottom: 1px solid #000;
}

.placeholder-image {
    width: 100%;
    height: 100%;
    background-color: #f0f0f0;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #666;
    font-weight: 500;
}

.portfolio-info {
    padding: 24px;
}

.portfolio-info h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 8px;
    color: #000;
}

.portfolio-info p {
    color: #666;
}

/* 联系部分 */
.contact {
    padding: 80px 0;
    background-color: #fff;
}

.contact h2 {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 48px;
    text-align: center;
    color: #000;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
}

.contact-item {
    margin-bottom: 32px;
}

.contact-item h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
    color: #000;
}

.contact-item p {
    color: #666;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 16px;
    border: 1px solid #000;
    background-color: #fff;
    font-family: inherit;
    font-size: 16px;
    color: #000;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    background-color: #f8f8f8;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: #666;
}

/* 页脚 */
.footer {
    padding: 40px 0;
    background-color: #000;
    color: #fff;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.social-links {
    display: flex;
    gap: 24px;
}

.social-links a {
    color: #fff;
    text-decoration: none;
    transition: color 0.2s ease;
}

.social-links a:hover {
    color: #ccc;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background-color: #fff;
        border-bottom: 1px solid #000;
        flex-direction: column;
        padding: 16px 24px;
        gap: 16px;
    }

    .nav-menu.active {
        display: flex;
    }

    .menu-toggle {
        display: flex;
    }

    .hero-content h1 {
        font-size: 32px;
    }

    .hero-content p {
        font-size: 18px;
    }

    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .portfolio-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }

    .container {
        padding: 0 16px;
    }

    .nav-container {
        padding: 0 16px;
    }
}

/* 页面加载动画 */
body:not(.loaded) {
    opacity: 0;
}

body.loaded {
    opacity: 1;
    transition: opacity 0.3s ease;
}