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

body {
    font-family: 'Rajdhani', sans-serif;
    background: #0a0a0a;
    color: #ffffff;
    overflow-x: hidden;
    line-height: 1.6;
}

/* 星空背景 */
.stars {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: transparent url('data:image/svg+xml;base64,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') repeat;
    animation: starsMove 20s linear infinite;
    z-index: -2;
}

.twinkling {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: transparent url('data:image/svg+xml;base64,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') repeat;
    animation: twinkle 4s ease-in-out infinite alternate;
    z-index: -1;
}

@keyframes starsMove {
    from { transform: translateY(0px); }
    to { transform: translateY(-200px); }
}

@keyframes twinkle {
    from { opacity: 0; }
    to { opacity: 1; }
}

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

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(10, 10, 10, 0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 255, 255, 0.3);
    z-index: 1000;
    padding: 15px 0;
}

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

.logo {
    display: flex;
    align-items: center;
    font-family: 'Orbitron', monospace;
    font-size: 24px;
    font-weight: 900;
    color: #00ffff;
    text-shadow: 0 0 10px #00ffff;
}

.logo i {
    margin-right: 10px;
    font-size: 28px;
}

.nav-menu {
    display: flex;
    gap: 30px;
}

.nav-link {
    color: #ffffff;
    text-decoration: none;
    font-weight: 600;
    position: relative;
    transition: all 0.3s ease;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, #00ffff, #ff00ff);
    transition: width 0.3s ease;
}

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

.nav-link:hover {
    color: #00ffff;
    text-shadow: 0 0 5px #00ffff;
}

/* 英雄区域 */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: 120px 0 60px;
    position: relative;
}

.hero-wrapper {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 80px;
    width: 100%;
}

.hero-content {
    flex: 1;
    text-align: left;
}

.hero-title {
    font-family: 'Orbitron', monospace;
    font-size: 4rem;
    font-weight: 900;
    margin-bottom: 20px;
    position: relative;
}

/* 故障效果 */
.glitch {
    position: relative;
    color: #00ffff;
    text-shadow: 
        0 0 5px #00ffff,
        0 0 10px #00ffff,
        0 0 15px #00ffff,
        0 0 20px #00ffff;
    animation: glitch 2s infinite;
}

.glitch::before,
.glitch::after {
    content: attr(data-text);
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.glitch::before {
    animation: glitch-1 0.5s infinite;
    color: #ff00ff;
    z-index: -1;
}

.glitch::after {
    animation: glitch-2 0.5s infinite;
    color: #ffff00;
    z-index: -2;
}

@keyframes glitch {
    0%, 100% { transform: translate(0); }
    20% { transform: translate(-2px, 2px); }
    40% { transform: translate(-2px, -2px); }
    60% { transform: translate(2px, 2px); }
    80% { transform: translate(2px, -2px); }
}

@keyframes glitch-1 {
    0%, 100% { transform: translate(0); }
    10% { transform: translate(-2px, -2px); }
    20% { transform: translate(2px, 2px); }
    30% { transform: translate(-2px, 2px); }
    40% { transform: translate(2px, -2px); }
}

@keyframes glitch-2 {
    0%, 100% { transform: translate(0); }
    10% { transform: translate(2px, 2px); }
    20% { transform: translate(-2px, -2px); }
    30% { transform: translate(2px, -2px); }
    40% { transform: translate(-2px, 2px); }
}

.hero-subtitle {
    font-size: 1.5rem;
    color: #00ffff;
    margin-bottom: 20px;
    font-weight: 600;
}

.hero-description {
    font-size: 1.1rem;
    color: #cccccc;
    margin-bottom: 40px;
    line-height: 1.6;
}

.hero-buttons {
    display: flex;
    gap: 20px;
    justify-content: flex-start;
    flex-wrap: wrap;
}

/* 按钮样式 */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 15px 30px;
    text-decoration: none;
    border-radius: 30px;
    font-weight: 600;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.6s ease;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    background: linear-gradient(45deg, #00ffff, #0080ff);
    color: #000;
    box-shadow: 0 0 20px rgba(0, 255, 255, 0.5);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 30px rgba(0, 255, 255, 0.7);
}

.btn-secondary {
    background: linear-gradient(45deg, #ff00ff, #ff0080);
    color: #fff;
    box-shadow: 0 0 20px rgba(255, 0, 255, 0.5);
}

.btn-secondary:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 30px rgba(255, 0, 255, 0.7);
}

.btn-youtube {
    background: linear-gradient(45deg, #ff0000, #cc0000);
    color: #fff;
    box-shadow: 0 0 20px rgba(255, 0, 0, 0.5);
}

.btn-youtube:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 30px rgba(255, 0, 0, 0.7);
}

/* AI大脑视觉效果 */
.hero-visual {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: center;
    margin-right: 80px;
}

.ai-brain {
    position: relative;
    width: 400px;
    height: 400px;
    perspective: 1000px;
}

.brain-core {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 120px;
    height: 120px;
    background: radial-gradient(circle at 30% 30%, #00ffff, #0080ff, #004080);
    border-radius: 50%;
    box-shadow: 
        0 0 40px #00ffff,
        0 0 80px rgba(0, 255, 255, 0.3),
        inset 0 0 40px rgba(255, 255, 255, 0.2);
    animation: coreRotate 6s linear infinite, corePulse 3s ease-in-out infinite alternate;
    z-index: 10;
}

.brain-core::before {
    content: '';
    position: absolute;
    top: 10%;
    left: 20%;
    width: 30%;
    height: 30%;
    background: rgba(255, 255, 255, 0.4);
    border-radius: 50%;
    animation: coreGlint 4s ease-in-out infinite;
}

/* 神经网络层 */
.neural-network {
    position: absolute;
    width: 100%;
    height: 100%;
    animation: networkRotate 20s linear infinite;
}

.neural-layer {
    position: absolute;
    width: 100%;
    height: 100%;
}

.neural-network .node {
    position: absolute;
    border-radius: 50%;
    animation: nodeFloat 4s ease-in-out infinite;
}

/* 第一层节点 */
.neural-layer:nth-child(1) .node {
    width: 16px;
    height: 16px;
    background: radial-gradient(circle, #ff00ff, #cc0088);
    box-shadow: 0 0 15px #ff00ff, 0 0 30px rgba(255, 0, 255, 0.3);
}

.neural-layer:nth-child(1) .node:nth-child(1) { 
    top: 15%; left: 25%; 
    animation-delay: 0s; 
}
.neural-layer:nth-child(1) .node:nth-child(2) { 
    top: 25%; right: 20%; 
    animation-delay: 0.8s; 
}
.neural-layer:nth-child(1) .node:nth-child(3) { 
    bottom: 15%; left: 30%; 
    animation-delay: 1.6s; 
}
.neural-layer:nth-child(1) .node:nth-child(4) { 
    bottom: 25%; right: 25%; 
    animation-delay: 2.4s; 
}
.neural-layer:nth-child(1) .node:nth-child(5) { 
    top: 50%; left: 10%; 
    animation-delay: 3.2s; 
}
.neural-layer:nth-child(1) .node:nth-child(6) { 
    top: 50%; right: 10%; 
    animation-delay: 4s; 
}

/* 第二层节点 */
.neural-layer:nth-child(2) .node {
    width: 12px;
    height: 12px;
    background: radial-gradient(circle, #ffff00, #ccaa00);
    box-shadow: 0 0 12px #ffff00, 0 0 24px rgba(255, 255, 0, 0.3);
}

.neural-layer:nth-child(2) .node:nth-child(1) { 
    top: 10%; left: 45%; 
    animation-delay: 0.4s; 
}
.neural-layer:nth-child(2) .node:nth-child(2) { 
    top: 35%; right: 12%; 
    animation-delay: 1.2s; 
}
.neural-layer:nth-child(2) .node:nth-child(3) { 
    bottom: 10%; left: 45%; 
    animation-delay: 2s; 
}
.neural-layer:nth-child(2) .node:nth-child(4) { 
    top: 35%; left: 12%; 
    animation-delay: 2.8s; 
}

/* 连接线 */
.connection {
    position: absolute;
    height: 1px;
    transform-origin: left center;
    animation: dataFlow 3s linear infinite;
}

.connection::before {
    content: '';
    position: absolute;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, #00ffff, transparent);
    animation: connectionPulse 2s linear infinite;
}

/* 动态连接线 */
.connection-1 {
    top: 20%;
    left: 30%;
    width: 120px;
    transform: rotate(25deg);
    background: linear-gradient(90deg, #ff00ff, #00ffff);
}

.connection-2 {
    top: 40%;
    left: 70%;
    width: 100px;
    transform: rotate(-45deg);
    background: linear-gradient(90deg, #00ffff, #ffff00);
    animation-delay: 0.5s;
}

.connection-3 {
    bottom: 30%;
    left: 35%;
    width: 110px;
    transform: rotate(60deg);
    background: linear-gradient(90deg, #ffff00, #ff00ff);
    animation-delay: 1s;
}

.connection-4 {
    top: 60%;
    left: 15%;
    width: 90px;
    transform: rotate(-30deg);
    background: linear-gradient(90deg, #ff00ff, #00ffff);
    animation-delay: 1.5s;
}

.connection-5 {
    bottom: 20%;
    right: 25%;
    width: 95px;
    transform: rotate(15deg);
    background: linear-gradient(90deg, #00ffff, #ffff00);
    animation-delay: 2s;
}

/* 环形轨道 */
.orbit {
    position: absolute;
    top: 50%;
    left: 50%;
    border: 1px solid rgba(0, 255, 255, 0.2);
    border-radius: 50%;
    transform: translate(-50%, -50%);
    animation: orbitRotate 15s linear infinite;
}

.orbit-1 {
    width: 200px;
    height: 200px;
}

.orbit-2 {
    width: 280px;
    height: 280px;
    animation-direction: reverse;
    animation-duration: 25s;
}

.orbit-3 {
    width: 360px;
    height: 360px;
    animation-duration: 35s;
}

/* 轨道上的粒子 */
.orbit-particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: #00ffff;
    border-radius: 50%;
    box-shadow: 0 0 6px #00ffff;
}

/* 动画定义 */
@keyframes coreRotate {
    from { transform: translate(-50%, -50%) rotateY(0deg); }
    to { transform: translate(-50%, -50%) rotateY(360deg); }
}

@keyframes corePulse {
    0% { 
        transform: translate(-50%, -50%) scale(1);
        box-shadow: 0 0 40px #00ffff, 0 0 80px rgba(0, 255, 255, 0.3), inset 0 0 40px rgba(255, 255, 255, 0.2);
    }
    100% { 
        transform: translate(-50%, -50%) scale(1.15);
        box-shadow: 0 0 60px #00ffff, 0 0 120px rgba(0, 255, 255, 0.5), inset 0 0 60px rgba(255, 255, 255, 0.3);
    }
}

@keyframes coreGlint {
    0%, 100% { opacity: 0.3; transform: scale(1); }
    50% { opacity: 0.8; transform: scale(1.2); }
}

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

@keyframes nodeFloat {
    0%, 100% { 
        transform: translateY(0px) scale(1);
        opacity: 0.8;
    }
    25% { 
        transform: translateY(-10px) scale(1.1);
        opacity: 1;
    }
    50% { 
        transform: translateY(-5px) scale(1.05);
        opacity: 0.9;
    }
    75% { 
        transform: translateY(-15px) scale(1.15);
        opacity: 1;
    }
}

@keyframes dataFlow {
    0% { opacity: 0.3; }
    50% { opacity: 1; }
    100% { opacity: 0.3; }
}

@keyframes connectionPulse {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

@keyframes orbitRotate {
    from { transform: translate(-50%, -50%) rotate(0deg); }
    to { transform: translate(-50%, -50%) rotate(360deg); }
}

/* 项目展示区域 */
.projects {
    padding: 100px 0;
    background: rgba(15, 15, 15, 0.8);
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-family: 'Orbitron', monospace;
    color: #00ffff;
    margin-bottom: 60px;
    position: relative;
}

.section-title i {
    margin-right: 15px;
    font-size: 2rem;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 3px;
    background: linear-gradient(90deg, #00ffff, #ff00ff);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    margin-top: 60px;
}

.project-card {
    background: rgba(20, 20, 20, 0.9);
    border: 1px solid rgba(0, 255, 255, 0.3);
    border-radius: 15px;
    padding: 30px;
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
    backdrop-filter: blur(10px);
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, #00ffff, #ff00ff);
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 255, 255, 0.3);
    border-color: #00ffff;
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.card-icon {
    width: 50px;
    height: 50px;
    background: linear-gradient(45deg, #00ffff, #0080ff);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #000;
    font-size: 20px;
}

.card-status {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
    color: #cccccc;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.status-dot.active {
    background: #00ff00;
    box-shadow: 0 0 10px #00ff00;
    animation: statusBlink 2s ease-in-out infinite;
}

.status-dot.pending {
    background: #ffff00;
    box-shadow: 0 0 10px #ffff00;
}

@keyframes statusBlink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.card-content h3 {
    font-size: 1.5rem;
    color: #00ffff;
    margin-bottom: 15px;
    font-family: 'Orbitron', monospace;
}

.card-content p {
    color: #cccccc;
    margin-bottom: 20px;
    line-height: 1.6;
}

.tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 20px;
}

.tech-tag {
    background: rgba(0, 255, 255, 0.2);
    color: #00ffff;
    padding: 5px 12px;
    border-radius: 15px;
    font-size: 0.85rem;
    border: 1px solid rgba(0, 255, 255, 0.3);
}

.card-footer {
    margin-top: 20px;
}

.card-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: #00ffff;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
}

.card-link:hover {
    color: #ffffff;
    text-shadow: 0 0 5px #00ffff;
}

.coming-soon-text {
    color: #ffff00;
    font-weight: 600;
}

.project-card.coming-soon {
    opacity: 0.8;
    border-color: rgba(255, 255, 0, 0.3);
}

.project-card.coming-soon::before {
    background: linear-gradient(90deg, #ffff00, #ff8800);
}

/* YouTube区域 */
.youtube-section {
    padding: 100px 0;
    background: rgba(20, 20, 20, 0.5);
}

.youtube-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.youtube-info h2 {
    font-size: 2.5rem;
    color: #ff0000;
    margin-bottom: 20px;
    font-family: 'Orbitron', monospace;
}

.youtube-info h2 i {
    margin-right: 15px;
}

.youtube-info p {
    color: #cccccc;
    font-size: 1.1rem;
    margin-bottom: 30px;
    line-height: 1.6;
}

.youtube-visual {
    display: flex;
    justify-content: center;
}

.video-placeholder {
    width: 400px;
    height: 225px;
    background: rgba(30, 30, 30, 0.8);
    border: 2px solid rgba(255, 0, 0, 0.5);
    border-radius: 15px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    color: #ff0000;
    font-size: 3rem;
}

.video-placeholder p {
    font-size: 1rem;
    margin-top: 15px;
    color: #cccccc;
}

/* 关于我区域 */
.about {
    padding: 100px 0;
}

.about-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.about-content p {
    font-size: 1.2rem;
    color: #cccccc;
    margin-bottom: 50px;
    line-height: 1.8;
}

.skills {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 25px;
    max-width: 1000px;
    margin: 0 auto;
}

.skill-item {
    background: rgba(30, 30, 30, 0.8);
    padding: 30px;
    border-radius: 15px;
    border: 1px solid rgba(0, 255, 255, 0.3);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 15px;
    transition: all 0.3s ease;
}

.skill-item:hover {
    transform: translateY(-5px);
    border-color: #00ffff;
    box-shadow: 0 10px 30px rgba(0, 255, 255, 0.3);
}

.skill-item i {
    font-size: 2.5rem;
    color: #00ffff;
    transition: all 0.3s ease;
}

.skill-item span {
    font-weight: 600;
    color: #ffffff;
    font-size: 0.95rem;
}

/* 基础技能样式 - 传统编程技术 */
.skill-item:has(.fa-python) i,
.skill-item:has(.fa-js-square) i,
.skill-item:has(.fa-database) i {
    color: #00ffff;
}

.skill-item:has(.fa-python):hover i,
.skill-item:has(.fa-js-square):hover i,
.skill-item:has(.fa-database):hover i {
    color: #00fff0;
    text-shadow: 0 0 15px #00ffff;
}

/* 机器学习技能样式 */
.skill-item:has(.fa-brain) i {
    color: #ff8800;
}

.skill-item:has(.fa-brain):hover i {
    color: #ffaa00;
    text-shadow: 0 0 15px #ff8800;
}

/* AI前沿技能特殊样式 - 大模型和AI工具 */
.skill-item:has(.fa-robot) i,
.skill-item:has(.fa-network-wired) i,
.skill-item:has(.fa-code) i,
.skill-item:has(.fa-github) i {
    color: #ff00ff;
    animation: aiGlow 3s ease-in-out infinite alternate;
}

.skill-item:has(.fa-robot):hover i,
.skill-item:has(.fa-network-wired):hover i,
.skill-item:has(.fa-code):hover i,
.skill-item:has(.fa-github):hover i {
    color: #ffff00;
    text-shadow: 0 0 20px #ffff00;
    animation: none;
}

/* AI技能发光动画 */
@keyframes aiGlow {
    0% { 
        text-shadow: 0 0 5px #ff00ff;
        transform: scale(1);
    }
    100% { 
        text-shadow: 0 0 15px #ff00ff, 0 0 25px rgba(255, 0, 255, 0.5);
        transform: scale(1.05);
    }
}

.skill-item:hover i {
    transform: scale(1.1);
    text-shadow: 0 0 15px currentColor;
}

/* 页脚 */
.footer {
    background: rgba(10, 10, 10, 0.9);
    border-top: 1px solid rgba(0, 255, 255, 0.3);
    padding: 50px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-bottom: 30px;
}

.footer-section h3,
.footer-section h4 {
    color: #00ffff;
    margin-bottom: 15px;
    font-family: 'Orbitron', monospace;
}

.footer-section p,
.footer-section li {
    color: #cccccc;
    line-height: 1.6;
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 8px;
}

.footer-section a {
    color: #cccccc;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: #00ffff;
}

.social-links {
    display: flex;
    gap: 15px;
    margin-top: 15px;
}

.social-links a {
    width: 40px;
    height: 40px;
    background: rgba(0, 255, 255, 0.2);
    border: 1px solid rgba(0, 255, 255, 0.3);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    color: #00ffff;
    transition: all 0.3s ease;
}

.social-links a:hover {
    background: rgba(0, 255, 255, 0.4);
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 255, 255, 0.3);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(0, 255, 255, 0.2);
    color: #888888;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero {
        padding: 100px 0 40px;
    }
    
    .hero-wrapper {
        flex-direction: column;
        text-align: center;
        gap: 40px;
    }
    
    .hero-content {
        text-align: center;
        margin-left: 0;
        max-width: 100%;
    }
    
    .hero-visual {
        margin-right: 0;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .hero-buttons {
        flex-direction: column;
        align-items: center;
        justify-content: center;
    }
    
    .youtube-content {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .nav-menu {
        display: none;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .skills {
        grid-template-columns: repeat(2, 1fr);
        gap: 20px;
    }
    
    .video-placeholder {
        width: 100%;
        max-width: 350px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .skills {
        grid-template-columns: 1fr;
    }
    
    .project-card {
        padding: 20px;
    }
}