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

:root {
    --primary-color: #ff6b35;
    --primary-hover: #e55a2b;
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #e9ecef;
    --text-primary: #212529;
    --text-secondary: #495057;
    --text-muted: #868e96;
    --border-color: #dee2e6;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);
    --shadow-xl: 0 16px 48px rgba(0, 0, 0, 0.2);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    overflow-x: hidden;
}

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

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    transition: all var(--transition-normal);
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
    letter-spacing: -0.5px;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 32px;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 15px;
    transition: color var(--transition-fast);
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: width var(--transition-normal);
}

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

.social-icons {
    display: flex;
    gap: 16px;
}

.social-icons a {
    color: var(--text-muted);
    font-size: 18px;
    transition: all var(--transition-fast);
}

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

.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.hamburger span {
    width: 25px;
    height: 2px;
    background: var(--text-primary);
    transition: all var(--transition-normal);
}

.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(5px, -5px);
}

/* Hero区 */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 24px 80px;
    position: relative;
    background: linear-gradient(135deg, #f8f9fa 0%, #ffffff 50%, #fff5f2 100%);
    overflow: hidden;
}

.orbit-container {
    position: absolute;
    width: 500px;
    height: 500px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    pointer-events: none;
}

.orbit {
    position: absolute;
    top: 50%;
    left: 50%;
    border: 1px solid rgba(255, 107, 53, 0.15);
    border-radius: 50%;
    animation: rotate 20s linear infinite;
}

.orbit-1 {
    width: 200px;
    height: 200px;
    margin: -100px 0 0 -100px;
    animation-duration: 15s;
}

.orbit-2 {
    width: 280px;
    height: 280px;
    margin: -140px 0 0 -140px;
    animation-duration: 20s;
    animation-direction: reverse;
}

.orbit-3 {
    width: 360px;
    height: 360px;
    margin: -180px 0 0 -180px;
    animation-duration: 25s;
}

.orbit-4 {
    width: 440px;
    height: 440px;
    margin: -220px 0 0 -220px;
    animation-duration: 30s;
    animation-direction: reverse;
}

.orbit-5 {
    width: 480px;
    height: 480px;
    margin: -240px 0 0 -240px;
    animation-duration: 35s;
}

.orbit-6 {
    width: 520px;
    height: 520px;
    margin: -260px 0 0 -260px;
    animation-duration: 40s;
    animation-direction: reverse;
}

.orbit-icon {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 36px;
    height: 36px;
    background: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    color: var(--primary-color);
    box-shadow: var(--shadow-sm);
    animation: counter-rotate 20s linear infinite;
}

.orbit-1 .orbit-icon { animation-duration: 15s; }
.orbit-2 .orbit-icon { animation-duration: 20s; animation-direction: reverse; }
.orbit-3 .orbit-icon { animation-duration: 25s; }
.orbit-4 .orbit-icon { animation-duration: 30s; animation-direction: reverse; }
.orbit-5 .orbit-icon { animation-duration: 35s; }
.orbit-6 .orbit-icon { animation-duration: 40s; animation-direction: reverse; }

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

@keyframes counter-rotate {
    from { transform: translateX(-50%) rotate(0deg); }
    to { transform: translateX(-50%) rotate(-360deg); }
}

.hero-card {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-radius: 24px;
    width: 380px;
    height: 400px;
    padding: 40px 35px 30px;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-xl);
    position: relative;
    z-index: 10;
    transform-style: preserve-3d;
    transition: transform var(--transition-slow);
}

.avatar {
    margin-bottom: 28px;
}

.avatar-placeholder {
    width: 120px;
    height: 120px;
    background: linear-gradient(135deg, var(--primary-color), #ff8c61);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    font-weight: 700;
    color: white;
    margin: 0 auto;
    box-shadow: 0 10px 40px rgba(255, 107, 53, 0.3);
}

.hero-title {
    font-size: 42px;
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 16px;
    letter-spacing: -1px;
    color: var(--text-primary);
}

.highlight {
    color: var(--primary-color);
    position: relative;
}

.hero-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    margin-bottom: 16px;
    font-weight: 500;
}

.hero-description {
    font-size: 16px;
    color: var(--text-muted);
    margin-bottom: 32px;
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 14px 32px;
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-weight: 600;
    text-decoration: none;
    transition: all var(--transition-normal);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
    box-shadow: 0 4px 16px rgba(255, 107, 53, 0.3);
}

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(255, 107, 53, 0.4);
}

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

.btn-secondary:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    transform: translateY(-2px);
}

/* 通用Section样式 */
.section {
    padding: 100px 0;
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 64px;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: var(--primary-color);
    margin: 16px auto 0;
    border-radius: 2px;
}

/* 关于我 */
.about {
    background: var(--bg-primary);
}

.about-card {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: 48px;
    box-shadow: var(--shadow-sm);
    max-width: 900px;
    margin: 0 auto;
}

.about-text p {
    font-size: 16px;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 20px;
}

.about-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 24px;
    margin-top: 32px;
    padding-top: 32px;
    border-top: 1px solid var(--border-color);
}

.info-item {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.info-label {
    font-size: 13px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 600;
}

.info-value {
    font-size: 16px;
    color: var(--text-primary);
    font-weight: 600;
}

/* 技能部分 */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
}

.skill-card {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    padding: 36px;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

.skill-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.skill-category {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 28px;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 10px;
}

.skill-category i {
    color: var(--primary-color);
    font-size: 22px;
}

.skill-items {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.skill-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
    font-size: 14px;
    font-weight: 600;
    color: var(--text-secondary);
}

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

.skill-progress {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), #ff8c61);
    border-radius: 4px;
    width: 0;
    transition: width 1.5s ease-out;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.tag {
    padding: 8px 18px;
    background: var(--bg-secondary);
    border-radius: 20px;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    transition: all var(--transition-fast);
}

.tag:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

/* 时间线 */
.timeline {
    position: relative;
    padding-left: 28px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 7px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--bg-tertiary);
}

.timeline-item {
    position: relative;
    margin-bottom: 32px;
}

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

.timeline-dot {
    position: absolute;
    left: -28px;
    top: 4px;
    width: 16px;
    height: 16px;
    background: var(--primary-color);
    border-radius: 50%;
    border: 3px solid white;
    box-shadow: var(--shadow-sm);
}

.timeline-content h4 {
    font-size: 17px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.timeline-date {
    font-size: 13px;
    color: var(--primary-color);
    font-weight: 600;
    display: block;
    margin-bottom: 8px;
}

.timeline-content p {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.6;
}

/* 作品展示 */
.works {
    background: var(--bg-primary);
}

.works-slider {
    overflow-x: auto;
    overflow-y: hidden;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: thin;
    scrollbar-color: var(--primary-color) var(--bg-tertiary);
}

.works-slider::-webkit-scrollbar {
    height: 8px;
}

.works-slider::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
    border-radius: 4px;
}

.works-slider::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 4px;
}

.work-cards-wrapper {
    display: flex;
    gap: 28px;
    padding: 8px 0 24px;
}

.work-card {
    flex: 0 0 340px;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
    cursor: pointer;
}

.work-card:hover {
    transform: translateY(-8px) scale(1.02);
    box-shadow: var(--shadow-lg);
}

.work-image {
    width: 100%;
    height: 200px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    position: relative;
    overflow: hidden;
}

.work-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 56px;
    color: rgba(255, 255, 255, 0.9);
}

.work-info {
    padding: 28px;
}

.work-info h3 {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.work-info > p {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: 16px;
}

.work-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 18px;
}

.work-tech span {
    padding: 4px 12px;
    background: var(--bg-tertiary);
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
}

.work-link {
    color: var(--primary-color);
    font-size: 14px;
    font-weight: 600;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: gap var(--transition-fast);
}

.work-link:hover {
    gap: 8px;
}

/* 联系方式 */
.contact {
    background: var(--bg-secondary);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    max-width: 1000px;
    margin: 0 auto;
}

.contact-info > p {
    font-size: 17px;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 32px;
}

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

.contact-method {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px 20px;
    background: var(--bg-primary);
    border-radius: var(--radius-sm);
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 15px;
    font-weight: 500;
    transition: all var(--transition-normal);
    box-shadow: var(--shadow-sm);
}

.contact-method i {
    font-size: 20px;
    color: var(--primary-color);
    width: 24px;
    text-align: center;
}

.contact-method:hover {
    transform: translateX(8px);
    box-shadow: var(--shadow-md);
    color: var(--primary-color);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 16px 20px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-family: inherit;
    transition: all var(--transition-fast);
    background: var(--bg-primary);
    color: var(--text-primary);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(255, 107, 53, 0.1);
}

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

.btn-submit {
    width: 100%;
    padding: 16px;
    font-size: 16px;
}

/* 页脚 */
.footer {
    background: var(--bg-secondary);
    color: var(--text-primary);
    padding: 40px 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

.footer-content p {
    font-size: 14px;
    opacity: 0.9;
    margin-bottom: 6px;
}

/* 动画类 */
.animate-fade-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

.animate-fade-up.visible {
    opacity: 1;
    transform: translateY(0);
}

/* 响应式设计 */
@media (max-width: 1024px) {
    .hero-card {
        width: 420px;
        height: 420px;
        padding: 40px;
    }

    .about-card {
        padding: 40px;
    }

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

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: rgba(255, 249, 230, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        align-items: center;
        padding: 32px 0;
        gap: 24px;
        transform: translateY(-150%);
        transition: transform var(--transition-normal);
        box-shadow: var(--shadow-lg);
    }

    .nav-menu.active {
        transform: translateY(0);
    }

    .social-icons {
        display: none;
    }

    .hamburger {
        display: flex;
    }

    .hero {
        padding: 100px 20px 60px;
    }

    .orbit-container {
        width: 350px;
        height: 350px;
    }

    .orbit-1 { width: 150px; height: 150px; margin: -75px 0 0 -75px; }
    .orbit-2 { width: 210px; height: 210px; margin: -105px 0 0 -105px; }
    .orbit-3 { width: 270px; height: 270px; margin: -135px 0 0 -135px; }
    .orbit-4 { width: 320px; height: 320px; margin: -160px 0 0 -160px; }
    .orbit-5 { width: 335px; height: 335px; margin: -167px 0 0 -167px; }
    .orbit-6 { width: 350px; height: 350px; margin: -175px 0 0 -175px; }

    .orbit-icon {
        width: 30px;
        height: 30px;
        font-size: 14px;
        top: -12px;
    }

    .hero-card {
        width: 320px;
        height: 320px;
        padding: 30px;
    }

    .avatar-placeholder {
        width: 100px;
        height: 100px;
        font-size: 40px;
    }

    .hero-title {
        font-size: 32px;
    }

    .hero-subtitle {
        font-size: 16px;
    }

    .section {
        padding: 70px 0;
    }

    .section-title {
        font-size: 28px;
        margin-bottom: 48px;
    }

    .about-card {
        padding: 28px;
    }

    .skill-card {
        padding: 28px;
    }

    .work-card {
        flex: 0 0 300px;
    }

    .work-image {
        height: 170px;
    }

    .work-info {
        padding: 22px;
    }

    .btn {
        padding: 12px 26px;
        font-size: 14px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 26px;
    }

    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }

    .btn {
        width: 100%;
    }

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

    .work-card {
        flex: 0 0 280px;
    }

    .contact-methods {
        gap: 12px;
    }

    .contact-method {
        padding: 14px 16px;
        font-size: 14px;
    }
}