/* ========== 全局变量 & 重置 ========== */
:root {
    --primary: #00d4ff;
    --primary-dark: #0099cc;
    --accent: #7c3aed;
    --accent-light: #a78bfa;
    --bg-dark: #0a0e1a;
    --bg-card: #111827;
    --bg-card-hover: #1e293b;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --border-color: #1e293b;
    --glow-cyan: 0 0 20px rgba(0, 212, 255, 0.3);
    --glow-purple: 0 0 20px rgba(124, 58, 237, 0.3);
    --gradient-cyan: linear-gradient(135deg, #00d4ff, #0099cc);
    --gradient-purple: linear-gradient(135deg, #7c3aed, #a78bfa);
    --gradient-mixed: linear-gradient(135deg, #00d4ff, #7c3aed);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', 'Microsoft YaHei', '微软雅黑', sans-serif;
    background: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ========== 粒子背景 ========== */
#particles-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

/* ========== 导航栏 ========== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 14, 26, 0.85);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 212, 255, 0.1);
    padding: 0 2rem;
    transition: all 0.3s ease;
}

.navbar.scrolled {
    background: rgba(10, 14, 26, 0.95);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.5);
}

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

.nav-logo {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-mixed);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 2px;
}

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

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    position: relative;
    padding: 0.5rem 0;
    transition: color 0.3s ease;
}

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

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

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    z-index: 1001;
}

.nav-toggle span {
    width: 25px;
    height: 2px;
    background: var(--primary);
    transition: all 0.3s ease;
}

/* ========== 主容器 ========== */
.container {
    position: relative;
    z-index: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* ========== Hero 区域 ========== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 100px 0 60px;
    position: relative;
}

.hero-content {
    text-align: center;
    max-width: 800px;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1.5rem;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 50px;
    font-size: 0.85rem;
    color: var(--primary);
    margin-bottom: 1.5rem;
    animation: fadeInDown 0.8s ease;
}

.hero-badge .dot {
    width: 8px;
    height: 8px;
    background: #22c55e;
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.hero-name {
    font-size: 4rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, #ffffff, #00d4ff, #7c3aed);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: fadeInUp 0.8s ease;
    letter-spacing: 4px;
}

.hero-title {
    font-size: 1.5rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-desc {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto 2rem;
    animation: fadeInUp 0.8s ease 0.4s both;
    line-height: 1.8;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 3rem;
    margin-top: 2.5rem;
    animation: fadeInUp 0.8s ease 0.6s both;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 800;
    background: var(--gradient-mixed);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

.hero-actions {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 2.5rem;
    animation: fadeInUp 0.8s ease 0.8s both;
}

/* ========== 按钮 ========== */
.btn {
    padding: 0.85rem 2rem;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--gradient-cyan);
    color: #0a0e1a;
    box-shadow: 0 4px 15px rgba(0, 212, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(0, 212, 255, 0.5);
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 2px solid rgba(0, 212, 255, 0.3);
}

.btn-outline:hover {
    background: rgba(0, 212, 255, 0.1);
    border-color: var(--primary);
    transform: translateY(-2px);
}

/* ========== 通用段落标题 ========== */
.section {
    padding: 80px 0;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-tag {
    display: inline-block;
    padding: 0.4rem 1.2rem;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 50px;
    font-size: 0.8rem;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 3px;
    margin-bottom: 1rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, #ffffff, #94a3b8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-line {
    width: 60px;
    height: 3px;
    background: var(--gradient-mixed);
    margin: 0 auto;
    border-radius: 3px;
}

/* ========== 技能卡片 ========== */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.skill-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2rem;
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

.skill-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-mixed);
    opacity: 0;
    transition: opacity 0.3s ease;
}

.skill-card:hover {
    transform: translateY(-5px);
    border-color: rgba(0, 212, 255, 0.3);
    box-shadow: var(--glow-cyan);
}

.skill-card:hover::before {
    opacity: 1;
}

.skill-icon {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
    margin-bottom: 1.2rem;
}

.skill-title {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.8rem;
    color: var(--text-primary);
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.skill-tag {
    padding: 0.35rem 0.8rem;
    background: rgba(0, 212, 255, 0.08);
    border: 1px solid rgba(0, 212, 255, 0.15);
    border-radius: 8px;
    font-size: 0.8rem;
    color: var(--text-secondary);
    transition: all 0.3s ease;
}

.skill-tag:hover {
    background: rgba(0, 212, 255, 0.15);
    color: var(--primary);
    border-color: rgba(0, 212, 255, 0.3);
}

/* ========== 进度条 ========== */
.skill-bar {
    margin-top: 1rem;
}

.skill-bar-item {
    margin-bottom: 0.8rem;
}

.skill-bar-label {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.3rem;
    font-size: 0.8rem;
}

.skill-bar-label span:first-child {
    color: var(--text-secondary);
}

.skill-bar-label span:last-child {
    color: var(--primary);
}

.skill-bar-track {
    height: 4px;
    background: rgba(0, 212, 255, 0.1);
    border-radius: 4px;
    overflow: hidden;
}

.skill-bar-fill {
    height: 100%;
    background: var(--gradient-cyan);
    border-radius: 4px;
    width: 0;
    transition: width 1.5s ease;
}

/* ========== 项目经历 ========== */
.projects-list {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2rem;
    transition: all 0.4s ease;
    position: relative;
    overflow: hidden;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--gradient-mixed);
    border-radius: 4px 0 0 4px;
}

.project-card:hover {
    transform: translateY(-3px);
    border-color: rgba(0, 212, 255, 0.2);
    box-shadow: var(--glow-cyan);
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.project-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
}

.project-role {
    padding: 0.35rem 1rem;
    background: rgba(0, 212, 255, 0.1);
    border: 1px solid rgba(0, 212, 255, 0.2);
    border-radius: 8px;
    font-size: 0.8rem;
    color: var(--primary);
    white-space: nowrap;
}

.project-time {
    font-size: 0.9rem;
    color: var(--primary);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.project-desc {
    color: var(--text-secondary);
    margin-bottom: 1.2rem;
    line-height: 1.7;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.2rem;
}

.tech-tag {
    padding: 0.3rem 0.8rem;
    background: rgba(124, 58, 237, 0.1);
    border: 1px solid rgba(124, 58, 237, 0.2);
    border-radius: 6px;
    font-size: 0.75rem;
    color: var(--accent-light);
}

.project-results {
    background: rgba(34, 197, 94, 0.05);
    border: 1px solid rgba(34, 197, 94, 0.1);
    border-radius: 12px;
    padding: 1rem 1.2rem;
}

.project-results h4 {
    font-size: 0.85rem;
    color: #22c55e;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.project-results ul {
    list-style: none;
    padding: 0;
}

.project-results li {
    color: var(--text-secondary);
    font-size: 0.9rem;
    padding: 0.25rem 0;
    padding-left: 1.2rem;
    position: relative;
}

.project-results li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: #22c55e;
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.8rem;
    color: var(--primary);
    text-decoration: none;
    font-size: 0.85rem;
    transition: color 0.3s ease;
}

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

/* 项目图片画廊 */
.project-images {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 12px;
    margin-top: 1.2rem;
}

.project-image-item {
    position: relative;
    aspect-ratio: 16 / 10;
    border-radius: 10px;
    overflow: hidden;
    cursor: pointer;
    border: 1px solid var(--border-color);
}

.project-image-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.project-image-item:hover img {
    transform: scale(1.08);
}

.image-overlay {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.4);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.project-image-item:hover .image-overlay {
    opacity: 1;
}

.image-overlay i {
    color: #fff;
    font-size: 1.5rem;
}

/* Lightbox 图片查看器 */
.lightbox {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.92);
    z-index: 9999;
    align-items: center;
    justify-content: center;
}

.lightbox.active {
    display: flex;
}

.lightbox-content {
    max-width: 90vw;
    max-height: 90vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.lightbox-content img {
    max-width: 90vw;
    max-height: 90vh;
    object-fit: contain;
    border-radius: 8px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
}

.lightbox-close {
    position: absolute;
    top: 20px;
    right: 30px;
    font-size: 2.5rem;
    color: #fff;
    background: none;
    border: none;
    cursor: pointer;
    opacity: 0.7;
    transition: opacity 0.2s ease;
    line-height: 1;
}

.lightbox-close:hover {
    opacity: 1;
}

.lightbox-prev,
.lightbox-next {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.5rem;
    color: #fff;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s ease;
}

.lightbox-prev { left: 20px; }
.lightbox-next { right: 20px; }

.lightbox-prev:hover,
.lightbox-next:hover {
    background: rgba(255, 255, 255, 0.2);
}

@media (max-width: 640px) {
    .project-images {
        grid-template-columns: repeat(2, 1fr);
    }

    .lightbox-prev,
    .lightbox-next {
        width: 40px;
        height: 40px;
        font-size: 1.2rem;
    }

    .lightbox-prev { left: 10px; }
    .lightbox-next { right: 10px; }
}

/* ========== 作品集 ========== */
.portfolio-filter {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3rem;
}

.filter-btn {
    padding: 0.7rem 1.8rem;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
}

.filter-btn:hover {
    border-color: rgba(0, 212, 255, 0.3);
    color: var(--primary);
}

.filter-btn.active {
    background: var(--gradient-cyan);
    border-color: transparent;
    color: #0a0e1a;
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
}

.portfolio-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
    transition: all 0.4s ease;
    cursor: pointer;
}

.portfolio-card:hover {
    transform: translateY(-5px);
    border-color: rgba(0, 212, 255, 0.3);
    box-shadow: var(--glow-cyan);
}

.portfolio-images {
    position: relative;
    aspect-ratio: 16 / 10;
    overflow: hidden;
}

.portfolio-images img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.portfolio-images .portfolio-video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.portfolio-card:hover .portfolio-images img,
.portfolio-card:hover .portfolio-images .portfolio-video {
    transform: scale(1.08);
}

.portfolio-card:hover .portfolio-video {
    transform: scale(1.08);
}

.portfolio-placeholder {
    width: 100%;
    height: 100%;
    background: rgba(0, 212, 255, 0.05);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    color: var(--text-secondary);
    opacity: 0.5;
}

.portfolio-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    padding: 1rem;
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.portfolio-category {
    padding: 0.3rem 0.8rem;
    background: rgba(0, 212, 255, 0.9);
    color: #0a0e1a;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 600;
}

.portfolio-count {
    padding: 0.3rem 0.6rem;
    background: rgba(0, 0, 0, 0.6);
    color: #fff;
    border-radius: 6px;
    font-size: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.portfolio-media-type {
    padding: 0.3rem 0.6rem;
    background: rgba(124, 58, 237, 0.9);
    color: #fff;
    border-radius: 6px;
    font-size: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.portfolio-info {
    padding: 1.2rem;
}

.portfolio-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.portfolio-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: 0.8rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.portfolio-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary);
    font-size: 0.85rem;
    text-decoration: none;
    transition: color 0.3s ease;
}

.portfolio-link:hover {
    color: var(--accent-light);
}

/* 作品集分类隐藏 */
.portfolio-card.hidden {
    display: none;
}

/* ========== 教育背景 ========== */
.education-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2.5rem;
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
    position: relative;
    overflow: hidden;
}

.education-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-mixed);
}

.edu-icon {
    width: 70px;
    height: 70px;
    border-radius: 50%;
    background: rgba(0, 212, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
    font-size: 1.8rem;
    color: var(--primary);
}

.edu-school {
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.edu-major {
    font-size: 1.1rem;
    color: var(--primary);
    margin-bottom: 0.5rem;
}

.edu-time {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.edu-courses {
    text-align: left;
    padding: 1.2rem;
    background: rgba(0, 212, 255, 0.05);
    border-radius: 12px;
    border: 1px solid rgba(0, 212, 255, 0.1);
}

.edu-courses h4 {
    font-size: 0.85rem;
    color: var(--primary);
    margin-bottom: 0.8rem;
}

.edu-courses p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ========== 获奖经历 ========== */
.awards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 1.5rem;
}

.award-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 1.5rem;
    transition: all 0.3s ease;
}

.award-card:hover {
    border-color: rgba(0, 212, 255, 0.3);
    transform: translateY(-3px);
}

.award-card-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.2rem;
}

.award-badge {
    width: 45px;
    height: 45px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    flex-shrink: 0;
}

.award-badge.gold {
    background: rgba(251, 191, 36, 0.1);
    color: #fbbf24;
}

.award-badge.silver {
    background: rgba(148, 163, 184, 0.1);
    color: #94a3b8;
}

.award-card-title {
    font-size: 0.85rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.award-item {
    display: flex;
    align-items: flex-start;
    gap: 0.8rem;
    padding: 0.6rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.03);
}

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

.award-year {
    font-size: 0.8rem;
    color: var(--primary);
    white-space: nowrap;
    min-width: 70px;
}

.award-name {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

.award-level {
    display: inline-block;
    padding: 0.15rem 0.5rem;
    border-radius: 4px;
    font-size: 0.7rem;
    margin-left: 0.5rem;
}

.level-province {
    background: rgba(0, 212, 255, 0.1);
    color: var(--primary);
}

.level-city {
    background: rgba(124, 58, 237, 0.1);
    color: var(--accent-light);
}

/* ========== 自我评价 ========== */
.evaluate-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.evaluate-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 2rem;
    transition: all 0.4s ease;
    text-align: center;
}

.evaluate-card:hover {
    transform: translateY(-5px);
    border-color: rgba(0, 212, 255, 0.3);
    box-shadow: var(--glow-cyan);
}

.evaluate-icon {
    width: 60px;
    height: 60px;
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.2rem;
    font-size: 1.5rem;
}

.evaluate-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 0.8rem;
}

.evaluate-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ========== 联系区域 ========== */
.contact-section {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 3rem;
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
    position: relative;
    overflow: hidden;
}

.contact-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-mixed);
}

.contact-title {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.contact-subtitle {
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.contact-items {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
    margin-bottom: 2rem;
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    padding: 1rem 1.5rem;
    background: rgba(0, 212, 255, 0.05);
    border: 1px solid rgba(0, 212, 255, 0.1);
    border-radius: 12px;
    transition: all 0.3s ease;
}

.contact-item:hover {
    background: rgba(0, 212, 255, 0.1);
    border-color: rgba(0, 212, 255, 0.3);
}

.contact-item i {
    font-size: 1.2rem;
    color: var(--primary);
}

.contact-item div {
    text-align: left;
}

.contact-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.contact-value {
    font-size: 0.95rem;
    font-weight: 600;
}

/* ========== 页脚 ========== */
.footer {
    text-align: center;
    padding: 2rem 0;
    border-top: 1px solid var(--border-color);
    margin-top: 4rem;
}

.footer p {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.footer a {
    color: var(--primary);
    text-decoration: none;
}

/* ========== 滚动动画 ========== */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

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

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

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.5;
        transform: scale(1.5);
    }
}

/* ========== 响应式 ========== */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        background: rgba(10, 14, 26, 0.98);
        flex-direction: column;
        justify-content: center;
        align-items: center;
        gap: 2rem;
    }

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

    .nav-links a {
        font-size: 1.3rem;
    }

    .nav-toggle {
        display: flex;
    }

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

    .hero-title {
        font-size: 1.2rem;
    }

    .hero-stats {
        gap: 1.5rem;
    }

    .stat-number {
        font-size: 2rem;
    }

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

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

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

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

    .project-header {
        flex-direction: column;
    }

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

    .portfolio-filter {
        flex-wrap: wrap;
    }

    .filter-btn {
        padding: 0.6rem 1.2rem;
        font-size: 0.85rem;
    }
}

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

    .container {
        padding: 0 1rem;
    }

    .section {
        padding: 60px 0;
    }

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

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