:root {
    --primary-color: #8478f2;
    --primary-dark: #7062e0;
    --secondary-color: #63d2c8;
    --accent-color: #b8a0f5;
    --bg-color: #f8f9ff;
    --bg-secondary: #f0f4fd;
    --bg-card: #ffffff;
    --text-primary: #242442;
    --text-secondary: #545478;
    --text-muted: #8686a6;
    --border-color: #e1e6f7;
    --gradient-primary: linear-gradient(135deg, #8478f2 0%, #63d2c8 100%);
    --gradient-accent: linear-gradient(135deg, #b8a0f5 0%, #97dcd4 100%);
    /* 新拟态柔和阴影 */
    --shadow-sm: 6px 6px 12px rgba(180, 188, 220, 0.25), -6px -6px 12px rgba(255, 255, 255, 0.8);
    --shadow-md: 8px 8px 16px rgba(180, 188, 220, 0.3), -8px -8px 16px rgba(255, 255, 255, 0.9);
    --shadow-lg: 12px 12px 24px rgba(180, 188, 220, 0.35), -12px -12px 24px rgba(255, 255, 255, 0.95);
    --radius-sm: 10px;
    --radius-md: 16px;
    --radius-lg: 24px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Noto Sans SC', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    /* 液态渐变底色基底 */
    background-image: radial-gradient(circle at 10% 10%, rgba(184, 160, 245, 0.18) 0%, transparent 50%),
                      radial-gradient(circle at 90% 80%, rgba(99, 210, 200, 0.16) 0%, transparent 55%);
    background-attachment: fixed;
}

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

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    background-color: rgba(248, 249, 255, 0.85);
    backdrop-filter: blur(12px);
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

.nav-logo {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-decoration: none;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
}

.nav-link:hover {
    color: var(--text-primary);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

.nav-link.active {
    color: var(--text-primary);
}

.nav-link.active::after {
    width: 100%;
}

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

.bar {
    width: 25px;
    height: 3px;
    background-color: var(--text-primary);
    margin: 4px 0;
    transition: all 0.3s ease;
}

.hamburger.active .bar:nth-child(1) {
    transform: rotate(-45deg) translate(-5px, 6px);
}

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

.hamburger.active .bar:nth-child(3) {
    transform: rotate(45deg) translate(-5px, -6px);
}

.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--gradient-primary);
    opacity: 0.06;
    z-index: 0;
}

.hero::after {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle, rgba(132, 120, 242, 0.12) 0%, transparent 70%);
    z-index: 0;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 1200px;
    width: 100%;
    padding: 0 20px;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.hero-text {
    animation: fadeInUp 1s ease forwards;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 20px;
}

.greeting {
    font-size: 1.5rem;
    font-weight: 400;
    color: var(--text-secondary);
}

.name {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.3rem;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    max-width: 500px;
}

.hero-buttons {
    display: flex;
    gap: 20px;
}

.btn {
    padding: 15px 30px;
    border-radius: var(--radius-md);
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    border: none;
    cursor: pointer;
    font-size: 1rem;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

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

.btn-secondary:hover {
    border-color: var(--primary-color);
    background: rgba(132, 120, 242, 0.08);
}

.hero-image {
    display: flex;
    justify-content: center;
    animation: fadeInUp 1s ease 0.3s forwards;
    opacity: 0;
}

.profile-photo {
    width: 300px;
    height: 300px;
    border-radius: 50%;
    background: var(--gradient-primary);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 8rem;
    color: white;
    box-shadow: var(--shadow-lg);
    transition: transform 0.3s ease;
}

.profile-photo:hover {
    transform: scale(1.05);
}

.scroll-indicator {
    position: absolute;
    bottom: 50px;
    left: 50%;
    transform: translateX(-50%);
    animation: bounce 2s infinite;
}

.scroll-link {
    color: var(--text-muted);
    font-size: 2rem;
    transition: color 0.3s ease;
}

.scroll-link:hover {
    color: var(--primary-color);
}

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

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

.about-content,
.project-card,
.contact-item {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.about-content.fade-in-up,
.project-card.fade-in-up,
.contact-item.fade-in-up {
    opacity: 1;
    transform: translateY(0);
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 60px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.about {
    padding: 100px 0;
    background: var(--bg-secondary);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 60px;
}

.about-info h3,
.about-description h3 {
    font-size: 1.3rem;
    margin-bottom: 25px;
    color: var(--text-primary);
}

.info-list {
    list-style: none;
}

.info-list li {
    padding: 12px 0;
    border-bottom: 1px solid var(--border-color);
}

.info-label {
    color: var(--text-muted);
    font-weight: 500;
    width: 100px;
    display: inline-block;
}

.about-description p {
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-size: 1.05rem;
    line-height: 1.8;
}

.skills {
    padding: 100px 0;
}

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

.skill-category h3 {
    font-size: 1.2rem;
    margin-bottom: 25px;
    color: var(--text-primary);
    padding-bottom: 10px;
    border-bottom: 2px solid var(--border-color);
}

.skill-items {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.skill-item {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.skill-name {
    color: var(--text-secondary);
    font-weight: 500;
}

.skill-bar {
    height: 8px;
    background: var(--bg-secondary);
    border-radius: 4px;
    overflow: hidden;
}

.skill-progress {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: 4px;
    transition: width 1s ease;
    opacity: 0;
}

.skill-progress.visible {
    opacity: 1;
}

.projects {
    padding: 100px 0;
    background: var(--bg-secondary);
}

.project-section {
    margin-bottom: 60px;
}

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

.project-subtitle {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 32px;
    display: flex;
    align-items: center;
    gap: 12px;
    letter-spacing: 0.02em;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 40px;
}

.project-card {
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.project-image {
    height: 200px;
    background: var(--gradient-primary);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 4rem;
    color: white;
    transition: transform 0.3s ease;
}

.project-card:hover .project-image {
    transform: scale(1.1);
}

.project-info {
    padding: 25px;
}

.project-title {
    font-size: 1.3rem;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.project-category {
    font-size: 0.9rem;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.project-description {
    color: var(--text-secondary);
    margin-bottom: 20px;
    font-size: 0.95rem;
    line-height: 1.6;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 20px;
}

.tech-tag {
    padding: 5px 12px;
    background: rgba(132, 120, 242, 0.12);
    color: var(--primary-color);
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
}

.project-links {
    display: flex;
    gap: 15px;
}

.project-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 5px;
    transition: color 0.3s ease;
}

.project-link:hover {
    color: var(--primary-color);
}

.contact {
    padding: 100px 0;
}

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

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 20px;
    padding: 20px;
    background: var(--bg-card);
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
}

.contact-item:hover {
    transform: translateX(10px);
    box-shadow: var(--shadow-md);
}

.contact-icon {
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.2rem;
    flex-shrink: 0;
    color:#fff;
}

.contact-detail h4 {
    font-size: 1rem;
    color: var(--text-muted);
    margin-bottom: 5px;
}

.contact-detail p {
    font-size: 1.1rem;
    color: var(--text-primary);
}

.contact-form {
    background: var(--bg-card);
    padding: 40px;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.contact-form h3 {
    font-size: 1.5rem;
    margin-bottom: 30px;
    color: var(--text-primary);
}

.form-group {
    margin-bottom: 20px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 15px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 1rem;
    font-family: inherit;
    transition: all 0.3s ease;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(132, 120, 242, 0.15);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-muted);
}

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 20px;
    margin-top: 60px;
}

.social-link {
    width: 50px;
    height: 50px;
    background: var(--bg-card);
    border-radius: 50%;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 1.3rem;
    color: var(--text-secondary);
    transition: all 0.3s ease;
    text-decoration: none;
    box-shadow: var(--shadow-sm);
}

.social-link:hover {
    background: var(--gradient-primary);
    color: white;
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.footer {
    padding: 30px 0;
    background: var(--bg-secondary);
    text-align: center;
    color: var(--text-muted);
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: rgba(248, 249, 255, 0.96);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        padding: 30px 0;
        backdrop-filter: blur(10px);
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-item {
        margin: 15px 0;
    }

    .hamburger {
        display: flex;
    }

    .hero-content {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-description {
        margin: 0 auto 40px;
    }

    .hero-buttons {
        justify-content: center;
    }

    .profile-photo {
        width: 200px;
        height: 200px;
        font-size: 5rem;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .contact-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .contact-form {
        padding: 30px 20px;
    }

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

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

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

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }

    .greeting {
        font-size: 1.2rem;
    }

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

    .btn {
        padding: 12px 20px;
        font-size: 0.9rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }
}