/* 全局样式 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #4a90e2;
    --secondary-color: #6c757d;
    --text-dark: #333;
    --text-light: #666;
    --bg-light: #f8f9fa;
    --white: #ffffff;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: var(--white);
    box-shadow: var(--shadow);
    z-index: 1000;
    transition: var(--transition);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 20px;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
}

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

.nav-links a {
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 500;
    transition: var(--transition);
}

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

.hamburger {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 3px;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background: var(--text-dark);
    transition: var(--transition);
}

/* 首页 Hero 区域 */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--white);
    padding-top: 80px;
}

.hero-content {
    text-align: center;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    opacity: 0;
    animation: fadeInUp 1s ease forwards;
}

.highlight {
    color: #ffd700;
}

.hero-subtitle {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    opacity: 0;
    animation: fadeInUp 1s ease 0.3s forwards;
}

.hero-description {
    font-size: 1.2rem;
    margin-bottom: 2rem;
    opacity: 0;
    animation: fadeInUp 1s ease 0.6s forwards;
}

.hero-buttons {
    opacity: 0;
    animation: fadeInUp 1s ease 0.9s forwards;
    display: flex;
    gap: 1rem;
    justify-content: center;
}

/* 按钮样式 */
.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    border-radius: 5px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: var(--primary-color);
    color: var(--white);
}

.btn-primary:hover {
    background: #3a7bc8;
    transform: translateY(-2px);
}

.btn-secondary {
    background: transparent;
    color: var(--white);
    border: 2px solid var(--white);
}

.btn-secondary:hover {
    background: var(--white);
    color: var(--primary-color);
}

.btn-full {
    width: 100%;
}

/* 通用区块样式 */
section {
    padding: 5rem 0;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
    color: var(--text-dark);
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: var(--primary-color);
    margin: 1rem auto 0;
}

/* 个人信息 */
.about {
    background: var(--white);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 3rem;
    align-items: center;
}

.about-image {
    display: flex;
    justify-content: center;
}

.image-placeholder {
    width: 250px;
    height: 250px;
    border-radius: 50%;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.about-text h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
}

.about-text p {
    margin-bottom: 1rem;
    color: var(--text-light);
    line-height: 1.8;
}

.personal-info {
    margin: 2rem 0;
}

.info-item {
    margin-bottom: 0.5rem;
    color: var(--text-light);
}

/* 技能 */
.skills {
    background: var(--bg-light);
}

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

.skill-category {
    background: var(--white);
    padding: 2rem;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.skill-category h3 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--primary-color);
}

.skill-items {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.skill-item {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.skill-item span {
    font-weight: 500;
    color: var(--text-dark);
}

.progress-bar {
    width: 100%;
    height: 10px;
    background: #e0e0e0;
    border-radius: 5px;
    overflow: hidden;
}

.progress {
    height: 100%;
    background: linear-gradient(90deg, #667eea, #764ba2);
    border-radius: 5px;
    transition: width 1s ease;
}

/* 作品 */
.portfolio {
    background: var(--white);
}

.timeline {
    position: relative;
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 100%;
    background: linear-gradient(to bottom, #667eea, #764ba2);
    border-radius: 2px;
}

.timeline-item {
    display: flex;
    align-items: center;
    margin-bottom: 3rem;
    position: relative;
}

.timeline-item.left {
    flex-direction: row;
}

.timeline-item.right {
    flex-direction: row-reverse;
}

.timeline-marker {
    flex: 0 0 120px;
    text-align: center;
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
    background: var(--white);
    border: 3px solid var(--primary-color);
    border-radius: 50%;
    width: 100px;
    height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    z-index: 1;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

.timeline-content {
    flex: 1;
    margin: 0 2rem;
}

.timeline-item.left .timeline-content {
    text-align: left;
}

.timeline-item.right .timeline-content {
    text-align: right;
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 2rem;
}

.portfolio-item {
    background: var(--white);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    margin-bottom: 1.5rem;
}

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

.portfolio-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.portfolio-info {
    padding: 1.5rem;
}

/* 已移除 portfolio-image 相关样式 */

.portfolio-info h3 {
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
    color: var(--text-dark);
}

.portfolio-info p {
    color: var(--text-light);
    margin-bottom: 1rem;
    line-height: 1.6;
}

.portfolio-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    justify-content: flex-start;
}

.timeline-item.left .portfolio-tags {
    justify-content: flex-start;
}

.timeline-item.right .portfolio-tags {
    justify-content: flex-end;
}

.portfolio-tags span {
    background: var(--bg-light);
    color: var(--primary-color);
    padding: 0.3rem 0.8rem;
    border-radius: 15px;
    font-size: 0.85rem;
}

/* 联系我 */
.contact {
    background: var(--bg-light);
}

.contact-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
}

.contact-card {
    background: var(--white);
    padding: 3rem;
    border-radius: 15px;
    box-shadow: var(--shadow);
    max-width: 800px;
    width: 100%;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 1.5rem 0;
    border-bottom: 1px solid #eee;
}

.contact-item:last-child {
    border-bottom: none;
}

.contact-item .icon {
    font-size: 2.5rem;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    border-radius: 50%;
}

.contact-item h4 {
    font-size: 1.2rem;
    color: var(--text-dark);
    margin-bottom: 0.3rem;
    font-weight: 600;
}

.contact-item p {
    color: var(--text-light);
    font-size: 1rem;
}

.social-links {
    display: flex;
    gap: 1rem;
}

.social-links a {
    color: var(--primary-color);
    text-decoration: none;
    transition: var(--transition);
    padding: 0.5rem 1rem;
    background: var(--bg-light);
    border-radius: 20px;
}

.social-links a:hover {
    background: var(--primary-color);
    color: var(--white);
    transform: translateY(-2px);
}

/* 页脚 */
.footer {
    background: var(--text-dark);
    color: var(--white);
    text-align: center;
    padding: 2rem 0;
}

/* 动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in {
    opacity: 0;
    animation: fadeInUp 1s ease forwards;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 70px;
        right: -100%;
        width: 70%;
        height: calc(100vh - 70px);
        background: var(--white);
        flex-direction: column;
        padding: 2rem;
        transition: var(--transition);
        box-shadow: -2px 0 10px rgba(0, 0, 0, 0.1);
    }

    .nav-links.active {
        right: 0;
    }

    .hamburger {
        display: flex;
    }

    .hamburger.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .hamburger.active span:nth-child(2) {
        opacity: 0;
    }

    .hamburger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(7px, -6px);
    }

    .hero h1 {
        font-size: 2rem;
    }

    .hero-subtitle {
        font-size: 1.3rem;
    }

    .hero-description {
        font-size: 1rem;
    }

    .hero-buttons {
        flex-direction: column;
        gap: 0.5rem;
    }

    .about-content {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .about-image {
        justify-content: center;
    }

    .contact-card {
        padding: 2rem 1.5rem;
    }

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

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

    .timeline::before {
        left: 50px;
    }

    .timeline-item.left,
    .timeline-item.right {
        flex-direction: row !important;
        padding-left: 80px;
    }

    .timeline-marker {
        position: absolute;
        left: 0;
        width: 80px;
        height: 80px;
        font-size: 1.2rem;
    }

    .timeline-content {
        margin: 0;
        text-align: left !important;
    }

    .section-title {
        font-size: 2rem;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 1.5rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .section-title {
        font-size: 1.5rem;
    }

    .logo {
        font-size: 1.2rem;
    }

    .nav-links {
        width: 80%;
    }
}

/* 学习中样式 */
.learning {
    padding: 100px 0;
    background: var(--bg-light);
}

/* 资格证书样式 */
.certificates {
    padding: 100px 0;
    background: var(--white);
}

.certificates-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.certificate-card {
    background: linear-gradient(135deg, #ffffff, #f8f9fa);
    border: 2px solid #e9ecef;
    border-radius: 15px;
    padding: 35px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    text-align: center;
}

.certificate-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(135deg, #f5af19, #f12711);
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition);
}

.certificate-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 35px rgba(245, 175, 25, 0.3);
    border-color: #f5af19;
}

.certificate-card:hover::before {
    transform: scaleX(1);
}

.certificate-icon {
    font-size: 3.5rem;
    margin-bottom: 20px;
}

.certificate-card h3 {
    font-size: 1.3rem;
    color: var(--text-dark);
    margin-bottom: 15px;
    font-weight: 600;
}

.certificate-card p {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 20px;
    font-size: 0.95rem;
}

.certificate-level {
    display: flex;
    justify-content: center;
    gap: 10px;
}

.level-badge {
    padding: 6px 18px;
    background: linear-gradient(135deg, #f5af19, #f12711);
    color: var(--white);
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

/* 移动端适配 */
@media (max-width: 768px) {
    .certificates {
        padding: 60px 0;
    }

    .certificates-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .certificate-card {
        padding: 25px;
    }

    .certificate-icon {
        font-size: 2.5rem;
    }

    .certificate-card h3 {
        font-size: 1.2rem;
    }

    .certificate-card p {
        font-size: 0.9rem;
    }
}

@media (max-width: 480px) {
    .certificate-card {
        padding: 20px;
    }

    .certificate-icon {
        font-size: 2rem;
    }

    .certificate-card h3 {
        font-size: 1.1rem;
    }
}

/* 规划中产品样式 */
.planning {
    padding: 100px 0;
    background: var(--white);
}

.planning-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.planning-card {
    background: linear-gradient(135deg, #f8f9fa, #ffffff);
    border: 2px solid #e9ecef;
    border-radius: 15px;
    padding: 35px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.planning-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(135deg, #f093fb, #f5576c);
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition);
}

.planning-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 35px rgba(240, 147, 251, 0.2);
    border-color: #f093fb;
}

.planning-card:hover::before {
    transform: scaleX(1);
}

.planning-icon {
    font-size: 3rem;
    margin-bottom: 15px;
}

.planning-card h3 {
    font-size: 1.4rem;
    color: var(--text-dark);
    margin-bottom: 15px;
}

.planning-card p {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 20px;
}

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

.planning-tags span {
    padding: 6px 14px;
    background: linear-gradient(135deg, #f093fb, #f5576c);
    color: var(--white);
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 500;
}

/* 移动端适配 */
@media (max-width: 768px) {
    .planning {
        padding: 60px 0;
    }

    .planning-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .planning-card {
        padding: 25px;
    }

    .planning-icon {
        font-size: 2.5rem;
    }

    .planning-card h3 {
        font-size: 1.2rem;
    }

    .planning-card p {
        font-size: 0.95rem;
    }
}

@media (max-width: 480px) {
    .planning-card {
        padding: 20px;
    }

    .planning-icon {
        font-size: 2rem;
    }

    .planning-card h3 {
        font-size: 1.1rem;
    }
}

.learning-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.learning-card {
    background: var(--white);
    border-radius: 15px;
    padding: 30px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.learning-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(135deg, var(--primary-color), #764ba2);
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition);
}

.learning-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.15);
}

.learning-card:hover::before {
    transform: scaleX(1);
}

.learning-icon {
    font-size: 3rem;
    margin-bottom: 15px;
}

.learning-card h3 {
    font-size: 1.4rem;
    color: var(--text-dark);
    margin-bottom: 15px;
}

.learning-time {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-light);
    font-size: 0.9rem;
    margin-bottom: 15px;
}

.learning-time .icon {
    font-size: 1rem;
}

.learning-card p {
    color: var(--text-light);
    line-height: 1.8;
    margin-bottom: 20px;
}

.learning-status {
    display: flex;
    gap: 10px;
}

.status-badge {
    padding: 6px 15px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
}

.status-badge.ongoing {
    background: linear-gradient(135deg, #667eea, #764ba2);
    color: var(--white);
}

.status-badge.completed {
    background: linear-gradient(135deg, #11998e, #38ef7d);
    color: var(--white);
}

/* 移动端适配 */
@media (max-width: 768px) {
    .learning {
        padding: 60px 0;
    }

    .learning-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .learning-card {
        padding: 25px;
    }

    .learning-icon {
        font-size: 2.5rem;
    }

    .learning-card h3 {
        font-size: 1.2rem;
    }

    .learning-card p {
        font-size: 0.95rem;
    }
}

@media (max-width: 480px) {
    .learning-card {
        padding: 20px;
    }

    .learning-icon {
        font-size: 2rem;
    }

    .learning-card h3 {
        font-size: 1.1rem;
    }
}