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

:root {
    --primary-color: #00d4ff;
    --secondary-color: #ff6b6b;
    --accent-color: #a8e6cf;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --bg-primary: #0a0a0a;
    --bg-secondary: #1a1a2e;
    --bg-tertiary: #16213e;
    --border-color: rgba(255, 255, 255, 0.1);
    --shadow-color: rgba(0, 212, 255, 0.1);
    --gradient-primary: linear-gradient(135deg, #00d4ff, #0099cc);
    --gradient-secondary: linear-gradient(135deg, #ff6b6b, #ff4757);
    --font-primary: 'Exo 2', sans-serif;
    --font-display: 'Orbitron', monospace;
}

body {
    font-family: var(--font-primary);
    background: linear-gradient(135deg, var(--bg-primary) 0%, var(--bg-secondary) 50%, var(--bg-tertiary) 100%);
    color: var(--text-primary);
    overflow-x: hidden;
    line-height: 1.6;
    font-weight: 300;
}

/* ===== 宇宙背景 ===== */
.cosmic-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
}

.stars, .stars2, .stars3 {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.stars {
    background: transparent url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="20" cy="20" r="0.5" fill="white"/><circle cx="80" cy="40" r="0.3" fill="white"/><circle cx="40" cy="80" r="0.4" fill="white"/><circle cx="90" cy="90" r="0.2" fill="white"/><circle cx="10" cy="60" r="0.3" fill="white"/><circle cx="70" cy="10" r="0.4" fill="white"/><circle cx="30" cy="70" r="0.2" fill="white"/><circle cx="85" cy="25" r="0.3" fill="white"/></svg>') repeat;
    animation: stars 20s linear infinite;
}

.stars2 {
    background: transparent url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="30" cy="30" r="0.2" fill="%23a8e6cf"/><circle cx="70" cy="20" r="0.3" fill="%23a8e6cf"/><circle cx="20" cy="70" r="0.4" fill="%23a8e6cf"/><circle cx="85" cy="85" r="0.1" fill="%23a8e6cf"/><circle cx="15" cy="40" r="0.2" fill="%23a8e6cf"/><circle cx="60" cy="60" r="0.3" fill="%23a8e6cf"/><circle cx="45" cy="15" r="0.2" fill="%23a8e6cf"/><circle cx="95" cy="50" r="0.1" fill="%23a8e6cf"/></svg>') repeat;
    animation: stars 15s linear infinite reverse;
}

.stars3 {
    background: transparent url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><circle cx="50" cy="50" r="0.1" fill="%23ff6b6b"/><circle cx="25" cy="25" r="0.2" fill="%23ff6b6b"/><circle cx="75" cy="75" r="0.1" fill="%23ff6b6b"/><circle cx="10" cy="90" r="0.3" fill="%23ff6b6b"/><circle cx="90" cy="10" r="0.2" fill="%23ff6b6b"/><circle cx="35" cy="65" r="0.1" fill="%23ff6b6b"/><circle cx="65" cy="35" r="0.2" fill="%23ff6b6b"/><circle cx="80" cy="80" r="0.1" fill="%23ff6b6b"/></svg>') repeat;
    animation: stars 25s linear infinite;
}

@keyframes stars {
    from { transform: translateY(0px); }
    to { transform: translateY(-100px); }
}

.nebula-layer {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 30%, rgba(0, 212, 255, 0.02) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(255, 107, 107, 0.02) 0%, transparent 50%);
    animation: nebulaFloat 40s ease-in-out infinite;
}

@keyframes nebulaFloat {
    0%, 100% { opacity: 0.3; }
    50% { opacity: 0.6; }
}

.quantum-field {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 30% 40%, rgba(0, 212, 255, 0.01) 0%, transparent 70%),
        radial-gradient(circle at 70% 60%, rgba(255, 107, 107, 0.01) 0%, transparent 70%);
    animation: quantumPulse 30s ease-in-out infinite;
}

@keyframes quantumPulse {
    0%, 100% { opacity: 0.2; }
    50% { opacity: 0.4; }
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===== 导航栏 ===== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(10, 10, 10, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    transition: all 0.3s ease;
}

.nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.logo-symbol {
    font-size: 1.5rem;
    color: var(--primary-color);
    animation: logoGlow 2s ease-in-out infinite alternate;
}

@keyframes logoGlow {
    0% { text-shadow: 0 0 5px var(--primary-color); }
    100% { text-shadow: 0 0 20px var(--primary-color), 0 0 30px var(--primary-color); }
}

.logo-text {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.2rem;
    letter-spacing: 2px;
    color: var(--text-primary);
}

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

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 400;
    transition: all 0.3s ease;
    position: relative;
    padding: 0.5rem 0;
}

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

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

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

.nav-toggle {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
    padding: 0.5rem;
    z-index: 1001;
    transition: all 0.3s ease;
}

.nav-toggle span {
    width: 25px;
    height: 2px;
    background: var(--text-primary);
    transition: all 0.3s ease;
    border-radius: 1px;
}

/* 汉堡按钮动画效果 */
.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* ===== 英雄区域 ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    z-index: 2;
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    align-items: center;
}

.hero-content {
    max-width: 500px;
}

.hero-badge {
    display: inline-block;
    background: rgba(0, 212, 255, 0.1);
    color: var(--primary-color);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-size: 0.875rem;
    font-weight: 400;
    margin-bottom: 2rem;
    border: 1px solid rgba(0, 212, 255, 0.2);
}

.hero-title {
    font-family: var(--font-display);
    font-size: 3.5rem;
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
}

.title-word {
    display: block;
    animation: titleReveal 0.8s ease-out forwards;
    opacity: 0;
    transform: translateY(30px);
}

.title-word:nth-child(1) { animation-delay: 0.2s; }
.title-word:nth-child(2) { animation-delay: 0.4s; }
.title-word:nth-child(3) { animation-delay: 0.6s; }

@keyframes titleReveal {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    line-height: 1.6;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* ===== 按钮样式 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-family: var(--font-primary);
    font-weight: 500;
    font-size: 0.875rem;
    text-decoration: none;
    cursor: pointer;
    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 0.5s ease;
}

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

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 212, 255, 0.4);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--primary-color);
}

.btn-outline {
    background: transparent;
    color: var(--primary-color);
    border: 1px solid var(--primary-color);
}

.btn-outline:hover {
    background: var(--primary-color);
    color: white;
}

.btn-icon {
    font-size: 1rem;
    transition: transform 0.3s ease;
}

.btn:hover .btn-icon {
    transform: translateX(4px);
}

/* ===== 宇宙球体 ===== */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.cosmic-orb {
    position: relative;
    width: 300px;
    height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.orb-core {
    width: 120px;
    height: 120px;
    background: radial-gradient(circle, var(--primary-color), #0099cc);
    border-radius: 50%;
    position: relative;
    animation: orbPulse 3s ease-in-out infinite;
    box-shadow: 
        0 0 30px rgba(0, 212, 255, 0.5),
        0 0 60px rgba(0, 212, 255, 0.3),
        0 0 90px rgba(0, 212, 255, 0.1);
}

@keyframes orbPulse {
    0%, 100% { 
        transform: scale(1);
        box-shadow: 
            0 0 30px rgba(0, 212, 255, 0.5),
            0 0 60px rgba(0, 212, 255, 0.3),
            0 0 90px rgba(0, 212, 255, 0.1);
    }
    50% { 
        transform: scale(1.1);
        box-shadow: 
            0 0 40px rgba(0, 212, 255, 0.6),
            0 0 80px rgba(0, 212, 255, 0.4),
            0 0 120px rgba(0, 212, 255, 0.2);
    }
}

.orb-rings {
    position: absolute;
    width: 100%;
    height: 100%;
    animation: orbRotate 20s linear infinite;
}

.orb-ring {
    position: absolute;
    border: 2px solid rgba(0, 212, 255, 0.3);
    border-radius: 50%;
    animation: ringExpand 4s ease-in-out infinite;
}

.orb-ring:nth-child(1) {
    width: 160px;
    height: 160px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: 0s;
}

.orb-ring:nth-child(2) {
    width: 220px;
    height: 220px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: 1s;
}

.orb-ring:nth-child(3) {
    width: 280px;
    height: 280px;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: 2s;
}

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

@keyframes ringExpand {
    0%, 100% { 
        opacity: 0.3;
        transform: translate(-50%, -50%) scale(1);
    }
    50% { 
        opacity: 0.8;
        transform: translate(-50%, -50%) scale(1.1);
    }
}

.orb-particles {
    position: absolute;
    width: 100%;
    height: 100%;
}

.particle {
    position: absolute;
    width: 2px;
    height: 2px;
    background: var(--primary-color);
    border-radius: 50%;
    animation: particleOrbit 8s linear infinite;
}

.particle:nth-child(1) {
    top: 20%;
    left: 20%;
    animation-delay: 0s;
}

.particle:nth-child(2) {
    top: 80%;
    left: 80%;
    animation-delay: 2s;
}

.particle:nth-child(3) {
    top: 50%;
    left: 10%;
    animation-delay: 4s;
}

@keyframes particleOrbit {
    0% {
        transform: rotate(0deg) translateX(50px) rotate(0deg);
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        transform: rotate(360deg) translateX(50px) rotate(-360deg);
        opacity: 0;
    }
}

/* ===== 通用容器 ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* ===== 章节样式 ===== */
section {
    padding: 6rem 0;
    position: relative;
    z-index: 2;
}

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

.section-title {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
    position: relative;
}

.section-line {
    width: 60px;
    height: 3px;
    background: var(--gradient-primary);
    margin: 0 auto;
    border-radius: 2px;
}

/* ===== 关于区域 ===== */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-paragraph {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.7;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.stat-card {
    text-align: center;
    padding: 2.5rem 1.5rem;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
    backdrop-filter: blur(10px);
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(0, 212, 255, 0.1), transparent);
    transition: left 0.5s ease;
}

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

.stat-card:hover {
    transform: translateY(-8px);
    border-color: var(--primary-color);
    box-shadow: 0 15px 40px rgba(0, 212, 255, 0.15);
}

.stat-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
    display: block;
}

.stat-card:nth-child(1) .stat-icon {
    color: var(--primary-color);
    text-shadow: 0 0 10px rgba(0, 212, 255, 0.5);
}

.stat-card:nth-child(2) .stat-icon {
    color: #ffd700;
    text-shadow: 0 0 10px rgba(255, 215, 0, 0.5);
}

.stat-card:nth-child(3) .stat-icon {
    color: #ff6b6b;
    text-shadow: 0 0 10px rgba(255, 107, 107, 0.5);
}

.stat-number {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 900;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    text-shadow: 0 0 20px rgba(255, 255, 255, 0.3);
}

.stat-label {
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 400;
    letter-spacing: 0.5px;
}

/* ===== 项目区域 ===== */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.project-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(0, 212, 255, 0.05), transparent);
    opacity: 0;
    transition: opacity 0.3s ease;
}

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

.project-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: 0 10px 30px rgba(0, 212, 255, 0.1);
}

.project-visual {
    display: flex;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.project-orb {
    width: 60px;
    height: 60px;
    background: radial-gradient(circle, var(--primary-color), #0099cc);
    border-radius: 50%;
    animation: projectPulse 2s ease-in-out infinite;
    box-shadow: 0 0 20px rgba(0, 212, 255, 0.3);
}

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

.project-card h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    text-align: center;
}

.more-projects {
    text-align: center;
    margin-top: 2rem;
}

/* ===== 联系区域 ===== */
.contact-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.contact-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.contact-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(0, 212, 255, 0.1), transparent);
    transition: left 0.5s ease;
}

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

.contact-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: 0 10px 30px rgba(0, 212, 255, 0.1);
}

/* 去除链接下划线并继承文字颜色 */
.contact-card.contact-card--glow {
    text-decoration: none;
    color: inherit;
    display: block;
}

/* 隐隐约约发亮的效果 */
.contact-card--glow {
    box-shadow: 0 0 0 rgba(0, 212, 255, 0);
}

.contact-card--glow::after {
    content: '';
    position: absolute;
    inset: -1px;
    border-radius: 12px;
    pointer-events: none;
    background: radial-gradient(120px 60px at 20% 10%, rgba(0, 212, 255, 0.12), transparent 60%),
                radial-gradient(160px 80px at 80% 120%, rgba(255, 107, 107, 0.08), transparent 60%);
    filter: blur(6px);
    opacity: 0.6;
    transition: opacity 0.3s ease, filter 0.3s ease;
}

@keyframes softPulseGlow {
    0%, 100% {
        box-shadow: 0 0 18px rgba(0, 212, 255, 0.10), 0 0 36px rgba(0, 212, 255, 0.06);
    }
    50% {
        box-shadow: 0 0 26px rgba(0, 212, 255, 0.16), 0 0 52px rgba(0, 212, 255, 0.10);
    }
}

.contact-card--glow {
    animation: softPulseGlow 3.2s ease-in-out infinite;
}

.contact-card--glow:hover {
    transform: translateY(-6px) scale(1.01);
    box-shadow: 0 0 28px rgba(0, 212, 255, 0.18), 0 0 60px rgba(0, 212, 255, 0.12);
}

.contact-card--glow:hover::after {
    opacity: 0.9;
    filter: blur(8px);
}

.contact-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.contact-info h3 {
    font-family: var(--font-display);
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.contact-info p {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* ===== 页脚 ===== */
.footer {
    background: rgba(10, 10, 10, 0.8);
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
    position: relative;
    z-index: 2;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.footer-text {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* ===== 响应式设计 ===== */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
    
    /* 移动端菜单展开样式 */
    .nav-links.open {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(10, 10, 10, 0.98);
        backdrop-filter: blur(10px);
        border-top: 1px solid var(--border-color);
        box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
        z-index: 1000;
        padding: 1rem 0;
        gap: 0;
        animation: slideDown 0.3s ease-out;
    }
    
    .nav-links.open .nav-link {
        padding: 1rem 2rem;
        border-bottom: 1px solid var(--border-color);
        text-align: center;
        font-size: 1.1rem;
    }
    
    .nav-links.open .nav-link:last-child {
        border-bottom: none;
    }
    
    .nav-links.open .nav-link:hover {
        background: rgba(0, 212, 255, 0.1);
        color: var(--primary-color);
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .hero-container {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .cosmic-orb {
        width: 200px;
        height: 200px;
    }
    
    .orb-core {
        width: 80px;
        height: 80px;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
    }
    
    .contact-cards {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    
    .hero-actions {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .section-title {
        font-size: 2rem;
    }
}