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

:root {
    --primary-color: #3B82F6;
    --secondary-color: #8B5CF6;
    --dark-color: #000000;
    --light-color: #F9FAFB;
    --text-color: #374151;
    --border-color: #E5E7EB;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
    line-height: 1.6;
    color: var(--text-color);
    overflow-x: hidden;
}

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

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    z-index: 1000;
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.2rem 20px;
}

.nav-brand h1 {
    font-size: 1.3rem;
    color: white;
    font-weight: 700;
    letter-spacing: -0.02em;
}

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

.nav-menu a {
    text-decoration: none;
    color: rgba(255, 255, 255, 0.7);
    font-weight: 500;
    font-size: 0.95rem;
    transition: color 0.2s;
}

.nav-menu a:hover {
    color: white;
}


/* 主页横幅 - 酷黑动效背景 */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: #000000;
    color: white;
    text-align: center;
    padding: 120px 20px 80px;
    overflow: hidden;
}

/* 网格动画层 */
.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 80px 80px;
    animation: gridPulse 4s ease-in-out infinite;
}

/* 光晕动画层 */
.hero::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    right: -50%;
    bottom: -50%;
    background: 
        radial-gradient(circle at 50% 50%, rgba(255, 255, 255, 0.03) 0%, transparent 50%);
    animation: glowPulse 6s ease-in-out infinite;
}

.hero-content {
    position: relative;
    z-index: 10;
    max-width: 800px;
}

.hero-title {
    font-size: clamp(4rem, 20vw, 18rem);
    font-weight: 900;
    margin-bottom: 2rem;
    animation: fadeInUp 1s ease;
    letter-spacing: -0.02em;
    line-height: 1.1;
    background: linear-gradient(135deg, #ffffff 0%, #a0a0a0 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    white-space: nowrap;
}

.hero-subtitle {
    font-size: 1.8rem;
    font-weight: 400;
    margin-bottom: 1.5rem;
    opacity: 0.7;
    animation: fadeInUp 1s ease 0.2s both;
    letter-spacing: 0.02em;
}

.hero-description {
    font-size: 1.1rem;
    margin-bottom: 3rem;
    opacity: 0.5;
    animation: fadeInUp 1s ease 0.4s both;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.btn-primary {
    display: inline-block;
    padding: 16px 40px;
    background: white;
    color: #000000;
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    font-size: 1rem;
    transition: all 0.2s;
    animation: fadeInUp 1s ease 0.6s both;
    border: 1px solid transparent;
}

.btn-primary:hover {
    background: rgba(255, 255, 255, 0.9);
    transform: translateY(-2px);
}

.hero-decoration {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
}

/* 动态光效元素 */
.circle {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    animation: orbFloat 10s ease-in-out infinite;
    mix-blend-mode: screen;
}

.circle-1 {
    width: 500px;
    height: 500px;
    top: -20%;
    right: -15%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.06) 0%, transparent 70%);
    animation-delay: 0s;
}

.circle-2 {
    width: 400px;
    height: 400px;
    bottom: -20%;
    left: -15%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.04) 0%, transparent 70%);
    animation-delay: 3s;
}

.circle-3 {
    width: 300px;
    height: 300px;
    top: 40%;
    left: 30%;
    background: radial-gradient(circle, rgba(255, 255, 255, 0.03) 0%, transparent 70%);
    animation-delay: 6s;
}


/* 穿越星空粒子效果 */
.particle {
    position: absolute;
    background: rgba(255, 255, 255, 1);
    border-radius: 50%;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
}


.scan-line {
    display: none;
}


/* 页脚 */
.footer {
    background: rgba(0, 0, 0, 0.95);
    color: white;
    padding: 40px 20px 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-content-simple {
    text-align: center;
    padding: 1rem 0 2rem;
}

.footer-info h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    color: white;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.footer-email {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.5rem;
}

.footer-email svg {
    flex-shrink: 0;
    opacity: 0.8;
}

.footer-email a {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    font-size: 1rem;
    transition: color 0.2s;
}

.footer-email a:hover {
    color: #3B82F6;
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-bottom p {
    margin-bottom: 0.5rem;
    opacity: 0.8;
}

.footer-bottom a {
    color: white;
    text-decoration: none;
    transition: color 0.3s;
}

.footer-bottom a:hover {
    color: #3B82F6;
}

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

/* 酷黑动效关键帧 */
@keyframes gridPulse {
    0%, 100% {
        opacity: 0.3;
    }
    50% {
        opacity: 0.8;
    }
}

@keyframes glowPulse {
    0%, 100% {
        transform: scale(1);
        opacity: 0.5;
    }
    50% {
        transform: scale(1.2);
        opacity: 1;
    }
}

@keyframes orbFloat {
    0%, 100% {
        transform: translate(0, 0) scale(1);
        opacity: 0.5;
    }
    50% {
        transform: translate(50px, -50px) scale(1.2);
        opacity: 1;
    }
}

@keyframes warpSpeed {
    0% {
        transform: translate(-50%, -50%) translateZ(0);
        opacity: 0;
    }
    10% {
        opacity: 1;
    }
    90% {
        opacity: 1;
    }
    100% {
        opacity: 0;
    }
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero-title {
        font-size: 8rem;
    }

    .hero-subtitle {
        font-size: 1.3rem;
    }

    .hero-description {
        font-size: 1rem;
    }

    .hero::before,
    .hero::after {
        animation-duration: 30s;
    }
    
    .circle-1, .circle-2, .circle-3 {
        opacity: 0.5;
        filter: blur(40px);
    }
    
    .particle {
        opacity: 0.2 !important;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 5rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
    }
    
    .footer-info h3 {
        font-size: 1.2rem;
    }
    
    .footer-email a {
        font-size: 0.95rem;
    }
}