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

:root {
    --primary-color: #2563eb;
    --secondary-color: #1e40af;
    --accent-color: #3b82f6;
    --gradient-1: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-2: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-3: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --gradient-hero: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    --text-color: #1f2937;
    --text-light: #6b7280;
    --bg-color: #ffffff;
    --bg-light: #f9fafb;
    --bg-dark: #0f172a;
    --border-color: #e5e7eb;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --shadow-glow: 0 0 20px rgba(102, 126, 234, 0.4);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background: linear-gradient(180deg, #f8fafc 0%, #e2e8f0 100%);
    background-attachment: fixed;
    overflow-x: hidden;
}

/* 动态背景粒子效果 */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(102, 126, 234, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(118, 75, 162, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 20%, rgba(240, 147, 251, 0.1) 0%, transparent 50%);
    animation: backgroundMove 20s ease-in-out infinite;
    pointer-events: none;
    z-index: 0;
}

@keyframes backgroundMove {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(50px, 50px) scale(1.1); }
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    position: relative;
    z-index: 1;
}

/* 导航栏 */
.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 1000;
    padding: 1rem 0;
    transition: all 0.3s ease;
}

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

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: gradientShift 3s ease infinite;
}

@keyframes gradientShift {
    0%, 100% { filter: hue-rotate(0deg); }
    50% { filter: hue-rotate(20deg); }
}

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

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

.nav-menu a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-1);
    transition: width 0.3s ease;
}

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

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

/* 首页横幅 */
.hero {
    background: var(--gradient-hero);
    background-size: 200% 200%;
    animation: gradientAnimation 15s ease infinite;
    color: white;
    padding: 10rem 0;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.1) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: particleMove 20s linear infinite;
    pointer-events: none;
}

@keyframes gradientAnimation {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

@keyframes particleMove {
    0% { transform: translate(0, 0); }
    100% { transform: translate(50px, 50px); }
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-content h1 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    animation: fadeInUp 0.8s ease-out;
    text-shadow: 0 4px 20px rgba(0, 0, 0, 0.2);
    font-weight: 700;
}

.hero-content p {
    font-size: 1.5rem;
    margin-bottom: 2.5rem;
    opacity: 0.95;
    animation: fadeInUp 0.8s ease-out 0.2s both;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.btn-primary {
    display: inline-block;
    padding: 1rem 2.5rem;
    background: rgba(255, 255, 255, 0.95);
    color: var(--primary-color);
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    transition: all 0.3s ease;
    animation: fadeInUp 0.8s ease-out 0.4s both;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.5);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn-primary:hover::before {
    width: 300px;
    height: 300px;
}

.btn-primary:hover {
    transform: translateY(-3px) scale(1.05);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.3);
}

/* 技能树部分 */
.skills-section {
    padding: 4rem 0;
    background: linear-gradient(180deg, #f8fafc 0%, #ffffff 50%, #f8fafc 100%);
    position: relative;
}

.section-title {
    text-align: center;
    font-size: 3rem;
    margin-bottom: 1rem;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
    position: relative;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: var(--gradient-1);
    border-radius: 2px;
}

.section-subtitle {
    text-align: center;
    font-size: 1.125rem;
    color: var(--text-light);
    margin-bottom: 2.5rem;
}

/* 技能卡片 */
.skill-card {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.9) 0%, rgba(255, 255, 255, 0.7) 100%);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    border: 1px solid rgba(255, 255, 255, 0.5);
    position: relative;
    overflow: hidden;
}

.skill-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s;
}

.skill-card:hover::before {
    left: 100%;
}

.skill-card:hover {
    transform: translateY(-10px) scale(1.02);
    box-shadow: 0 20px 50px rgba(102, 126, 234, 0.3);
    border-color: rgba(102, 126, 234, 0.3);
}

.skill-icon {
    font-size: 3.5rem;
    margin-bottom: 1rem;
    display: inline-block;
    animation: float 3s ease-in-out infinite;
    filter: drop-shadow(0 4px 8px rgba(0, 0, 0, 0.1));
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

.skill-card h3 {
    font-size: 1.75rem;
    margin-bottom: 1rem;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    font-weight: 700;
}

.skill-content h4 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--text-color);
    font-weight: 600;
}

.skill-content ul {
    list-style: none;
    margin-bottom: 1rem;
}

.skill-content ul li {
    padding: 0.75rem 0;
    padding-left: 2rem;
    position: relative;
    transition: transform 0.3s;
}

.skill-content ul li:hover {
    transform: translateX(5px);
}

.skill-content ul li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
    font-size: 1.2rem;
    background: linear-gradient(135deg, #667eea, #764ba2);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* 展示链接 */
.showcase-link {
    margin-top: 1rem;
}

.btn-link {
    display: inline-block;
    padding: 0.875rem 2rem;
    background: var(--gradient-1);
    color: white;
    text-decoration: none;
    border-radius: 50px;
    font-weight: 600;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(102, 126, 234, 0.4);
    position: relative;
    overflow: hidden;
}

.btn-link::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

.btn-link:hover::before {
    width: 300px;
    height: 300px;
}

.btn-link:hover {
    transform: translateX(5px) scale(1.05);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.6);
}

/* 图片展示 */
.showcase-images {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-top: 1rem;
}

.image-item {
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    background: white;
    position: relative;
}

.image-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1), rgba(118, 75, 162, 0.1));
    opacity: 0;
    transition: opacity 0.3s;
    z-index: 1;
}

.image-item:hover::before {
    opacity: 1;
}

.image-item:hover {
    transform: translateY(-10px) scale(1.03);
    box-shadow: 0 15px 40px rgba(102, 126, 234, 0.3);
}

.image-item img {
    width: 100%;
    height: 250px;
    object-fit: cover;
    display: block;
    transition: transform 0.4s;
}

.image-item:hover img {
    transform: scale(1.1);
}

.image-item p {
    padding: 1rem;
    text-align: center;
    background: linear-gradient(135deg, #f8fafc, #e2e8f0);
    color: var(--text-color);
    font-weight: 600;
    position: relative;
    z-index: 2;
}

/* 视频展示 */
.showcase-videos {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 1.5rem;
    margin-top: 1rem;
}

.video-item {
    border-radius: 15px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    background: linear-gradient(135deg, #1e293b, #0f172a);
    transition: all 0.4s ease;
    position: relative;
}

.video-item::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.2), rgba(118, 75, 162, 0.2));
    opacity: 0;
    transition: opacity 0.3s;
    pointer-events: none;
}

.video-item:hover::after {
    opacity: 1;
}

.video-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(102, 126, 234, 0.4);
}

.video-item video {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 15px 15px 0 0;
}

.video-item p {
    padding: 1rem;
    text-align: center;
    background: linear-gradient(135deg, #f8fafc, #e2e8f0);
    color: var(--text-color);
    font-weight: 600;
    margin: 0;
}

/* 关于我们部分 */
.about-section {
    padding: 4rem 0;
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.05), rgba(118, 75, 162, 0.05));
    position: relative;
}

.about-content {
    max-width: 1200px;
    margin: 0 auto;
}

.about-intro,
.about-capabilities,
.about-values {
    margin-bottom: 2.5rem;
}

.about-intro h3,
.about-capabilities h3,
.about-values h3 {
    font-size: 2rem;
    margin-bottom: 1.5rem;
    background: var(--gradient-1);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-align: center;
    font-weight: 700;
}

.about-text {
    font-size: 1.125rem;
    line-height: 2;
    color: var(--text-light);
    margin-bottom: 2rem;
    text-align: left;
}

.about-intro .about-text {
    text-align: center;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

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

.capability-item {
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.9) 0%, rgba(255, 255, 255, 0.7) 100%);
    backdrop-filter: blur(10px);
    border-radius: 15px;
    padding: 2rem;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    border: 1px solid rgba(255, 255, 255, 0.5);
    position: relative;
    overflow: hidden;
}

.capability-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(102, 126, 234, 0.1), transparent);
    transition: left 0.5s;
}

.capability-item:hover::before {
    left: 100%;
}

.capability-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(102, 126, 234, 0.2);
}

.capability-item h4 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--primary-color);
    font-weight: 600;
}

.capability-item p {
    font-size: 1rem;
    line-height: 1.8;
    color: var(--text-light);
    margin: 0;
}

/* 页脚 */
.footer {
    background: linear-gradient(135deg, #0f172a, #1e293b);
    color: white;
    padding: 2.5rem 0 1.5rem;
    position: relative;
    overflow: hidden;
}

.footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(102, 126, 234, 0.5), transparent);
}

.footer-content {
    margin-bottom: 2rem;
}

.footer-info {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    max-width: 900px;
    margin: 0 auto;
}

.footer-item {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    padding: 0.75rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

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

.footer-label {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.95rem;
    min-width: 80px;
    flex-shrink: 0;
}

.footer-value {
    color: rgba(255, 255, 255, 0.9);
    font-size: 0.95rem;
    flex: 1;
}

.footer-item a {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    transition: color 0.3s;
}

.footer-item a:hover {
    color: #667eea;
}

.footer-bottom {
    text-align: center;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.875rem;
    line-height: 1.6;
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    transition: color 0.3s;
}

.footer-bottom a:hover {
    color: #667eea;
}

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

/* 响应式设计 */
@media (max-width: 768px) {
    .hero-content h1 {
        font-size: 2.5rem;
    }

    .hero-content p {
        font-size: 1.125rem;
    }

    .section-title {
        font-size: 2.25rem;
    }

    .skill-card {
        padding: 2rem;
    }

    .showcase-images {
        grid-template-columns: 1fr;
    }

    .showcase-videos {
        grid-template-columns: 1fr;
    }

    .nav-menu {
        gap: 1rem;
        font-size: 0.9rem;
    }

    .footer-info {
        gap: 0.75rem;
    }

    .footer-item {
        flex-direction: column;
        gap: 0.25rem;
    }

    .footer-label {
        min-width: auto;
    }

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

    .about-intro h3,
    .about-capabilities h3,
    .about-values h3 {
        font-size: 1.75rem;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 6rem 0;
    }

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

    .skills-section,
    .about-section {
        padding: 4rem 0;
    }

    .skill-card {
        padding: 1.5rem;
    }
}