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

:root {
    --color-black: #000000;
    --color-white: #ffffff;
    --color-gray: #f2f2f2;
    --color-dark: #0b0b0b;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Harm Sans SC', 'SF Pro Display', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background-color: var(--color-black);
    color: var(--color-white);
    line-height: 1.5;
    overflow-x: hidden;
}

a {
    text-decoration: none;
    color: inherit;
}

/* 导航栏 - SpaceX风格 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 20px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: linear-gradient(180deg, rgba(0,0,0,0.8) 0%, transparent 100%);
    transition: background 0.3s ease;
}

.navbar.scrolled {
    background: rgba(0, 0, 0, 0.9);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1400px;
    width: 100%;
    margin: 0 auto;
}

.logo {
    font-size: 20px;
    font-weight: 700;
    letter-spacing: 2px;
    color: var(--color-white);
    text-transform: uppercase;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 30px;
    list-style: none;
}

.nav-menu a {
    font-size: 14px;
    font-weight: 500;
    letter-spacing: 1px;
    color: var(--color-white);
    opacity: 0.9;
    transition: opacity 0.3s ease;
    text-transform: uppercase;
}

.nav-menu a:hover {
    opacity: 1;
}

.nav-cta {
    padding: 10px 20px;
    background: var(--color-white);
    color: var(--color-black) !important;
    font-weight: 600 !important;
    text-transform: uppercase !important;
    transition: all 0.3s ease;
}

.nav-cta:hover {
    background: #e6e6e6;
}

/* Hero区域 - 全屏大气 */
.hero {
    height: 100vh;
    width: 100%;
    position: relative;
    display: flex;
    align-items: flex-end;
    padding-bottom: 100px;
    overflow: hidden;
}

/* 模拟太空背景 - 极光效果 */
.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, #020014 0%, #09092b 50%, #0d1a2d 100%);
    z-index: -1;
    overflow: hidden;
}

/* 极光光带1 - 绿色 */
.hero-bg .aurora-1 {
    position: absolute;
    top: 0;
    left: -20%;
    width: 60%;
    height: 100%;
    background: linear-gradient(
        180deg,
        transparent 0%,
        rgba(0, 255, 150, 0.03) 20%,
        rgba(0, 255, 150, 0.08) 35%,
        rgba(0, 255, 150, 0.12) 50%,
        rgba(0, 255, 150, 0.08) 65%,
        rgba(0, 255, 150, 0.03) 80%,
        transparent 100%
    );
    filter: blur(30px);
    animation: auroraWave1 12s ease-in-out infinite;
    transform: skewX(-15deg);
    pointer-events: none;
}

@keyframes auroraWave1 {
    0%, 100% { 
        transform: skewX(-15deg) translateX(0) scaleY(1);
        opacity: 0.6;
    }
    25% { 
        transform: skewX(-12deg) translateX(10%) scaleY(1.2);
        opacity: 0.9;
    }
    50% { 
        transform: skewX(-18deg) translateX(-5%) scaleY(0.9);
        opacity: 0.7;
    }
    75% { 
        transform: skewX(-14deg) translateX(8%) scaleY(1.1);
        opacity: 0.8;
    }
}

/* 极光光带2 - 青绿色 */
.hero-bg .aurora-2 {
    position: absolute;
    top: -10%;
    right: -10%;
    width: 55%;
    height: 120%;
    background: linear-gradient(
        180deg,
        transparent 0%,
        rgba(0, 220, 255, 0.02) 15%,
        rgba(0, 220, 255, 0.06) 30%,
        rgba(0, 220, 255, 0.1) 45%,
        rgba(0, 220, 255, 0.06) 60%,
        rgba(0, 220, 255, 0.02) 75%,
        transparent 100%
    );
    filter: blur(40px);
    animation: auroraWave2 15s ease-in-out infinite;
    transform: skewX(10deg);
    pointer-events: none;
}

@keyframes auroraWave2 {
    0%, 100% { 
        transform: skewX(10deg) translateX(0) scaleY(1);
        opacity: 0.5;
    }
    33% { 
        transform: skewX(8deg) translateX(-15%) scaleY(1.3);
        opacity: 0.8;
    }
    66% { 
        transform: skewX(12deg) translateX(10%) scaleY(0.8);
        opacity: 0.6;
    }
}

/* 极光光带3 - 紫色 */
.hero-bg .aurora-3 {
    position: absolute;
    top: 5%;
    left: 30%;
    width: 45%;
    height: 90%;
    background: linear-gradient(
        180deg,
        transparent 0%,
        rgba(180, 100, 255, 0.02) 20%,
        rgba(180, 100, 255, 0.05) 40%,
        rgba(180, 100, 255, 0.08) 55%,
        rgba(180, 100, 255, 0.05) 70%,
        transparent 100%
    );
    filter: blur(35px);
    animation: auroraWave3 18s ease-in-out infinite;
    transform: skewX(-5deg);
    pointer-events: none;
}

@keyframes auroraWave3 {
    0%, 100% { 
        transform: skewX(-5deg) translateX(0) scaleY(1);
        opacity: 0.4;
    }
    50% { 
        transform: skewX(-8deg) translateX(20%) scaleY(1.2);
        opacity: 0.7;
    }
}

/* 极光光带4 - 粉色 */
.hero-bg .aurora-4 {
    position: absolute;
    bottom: 0;
    left: 10%;
    width: 50%;
    height: 80%;
    background: linear-gradient(
        180deg,
        transparent 0%,
        rgba(255, 100, 180, 0.015) 25%,
        rgba(255, 100, 180, 0.04) 45%,
        rgba(255, 100, 180, 0.025) 65%,
        transparent 100%
    );
    filter: blur(50px);
    animation: auroraWave4 20s ease-in-out infinite;
    transform: skewX(5deg);
    pointer-events: none;
}

@keyframes auroraWave4 {
    0%, 100% { 
        transform: skewX(5deg) translateX(0) scaleY(1);
        opacity: 0.3;
    }
    40% { 
        transform: skewX(3deg) translateX(-10%) scaleY(1.4);
        opacity: 0.6;
    }
}

/* 星空底层 */
.hero-bg .stars {
    position: absolute;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(1.5px 1.5px at 15px 25px, #fff, transparent),
        radial-gradient(1.5px 1.5px at 45px 75px, rgba(255,255,255,0.8), transparent),
        radial-gradient(1px 1px at 90px 40px, #fff, transparent),
        radial-gradient(2px 2px at 130px 85px, rgba(255,255,255,0.6), transparent),
        radial-gradient(1px 1px at 160px 130px, #fff, transparent),
        radial-gradient(1.5px 1.5px at 200px 55px, rgba(255,255,255,0.9), transparent),
        radial-gradient(1px 1px at 250px 170px, #fff, transparent),
        radial-gradient(1.5px 1.5px at 300px 95px, rgba(255,255,255,0.7), transparent),
        radial-gradient(1px 1px at 350px 210px, #fff, transparent),
        radial-gradient(2px 2px at 400px 150px, rgba(255,255,255,0.8), transparent),
        radial-gradient(1px 1px at 500px 70px, #fff, transparent),
        radial-gradient(1.5px 1.5px at 600px 190px, rgba(255,255,255,0.6), transparent),
        radial-gradient(1px 1px at 700px 110px, #fff, transparent),
        radial-gradient(1.5px 1.5px at 800px 60px, rgba(255,255,255,0.9), transparent),
        radial-gradient(1px 1px at 900px 160px, #fff, transparent),
        radial-gradient(2px 2px at 1000px 90px, rgba(255,255,255,0.7), transparent),
        radial-gradient(1px 1px at 1100px 210px, #fff, transparent),
        radial-gradient(1.5px 1.5px at 1200px 130px, rgba(255,255,255,0.8), transparent);
    background-size: 1400px 500px;
    animation: twinkle 6s ease-in-out infinite;
    pointer-events: none;
}

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

/* 星空效果 */
.hero-bg::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(2px 2px at 20px 30px, #fff, transparent),
        radial-gradient(2px 2px at 40px 70px, rgba(255,255,255,0.8), transparent),
        radial-gradient(1px 1px at 90px 40px, #fff, transparent),
        radial-gradient(2px 2px at 130px 80px, rgba(255,255,255,0.6), transparent),
        radial-gradient(1px 1px at 160px 120px, #fff, transparent),
        radial-gradient(2px 2px at 200px 50px, rgba(255,255,255,0.7), transparent),
        radial-gradient(1px 1px at 250px 160px, #fff, transparent),
        radial-gradient(2px 2px at 300px 90px, rgba(255,255,255,0.5), transparent),
        radial-gradient(1px 1px at 350px 200px, #fff, transparent),
        radial-gradient(2px 2px at 400px 140px, rgba(255,255,255,0.8), transparent),
        radial-gradient(1px 1px at 500px 60px, #fff, transparent),
        radial-gradient(2px 2px at 600px 180px, rgba(255,255,255,0.6), transparent),
        radial-gradient(1px 1px at 700px 100px, #fff, transparent),
        radial-gradient(2px 2px at 800px 50px, rgba(255,255,255,0.7), transparent),
        radial-gradient(1px 1px at 900px 150px, #fff, transparent),
        radial-gradient(2px 2px at 1000px 80px, rgba(255,255,255,0.5), transparent),
        radial-gradient(1px 1px at 1100px 200px, #fff, transparent),
        radial-gradient(2px 2px at 1200px 120px, rgba(255,255,255,0.8), transparent),
        radial-gradient(1px 1px at 200px 300px, #fff, transparent),
        radial-gradient(2px 2px at 400px 400px, rgba(255,255,255,0.6), transparent),
        radial-gradient(1px 1px at 600px 350px, #fff, transparent),
        radial-gradient(2px 2px at 800px 380px, rgba(255,255,255,0.7), transparent),
        radial-gradient(1px 1px at 1000px 320px, #fff, transparent),
        radial-gradient(2px 2px at 1150px 400px, rgba(255,255,255,0.5), transparent);
    background-size: 1400px 500px;
    animation: twinkle 8s ease-in-out infinite;
}

@keyframes twinkle {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

/* 地球/星球效果 */
.hero-bg::after {
    content: '';
    position: absolute;
    bottom: -200px;
    left: 50%;
    transform: translateX(-50%);
    width: 150%;
    height: 400px;
    background: 
        radial-gradient(ellipse at center, #1e3a5f 0%, #0a1628 40%, transparent 70%);
    filter: blur(20px);
}

/* 主内容 */
.hero-content {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 40px;
    text-align: left;
}

.hero-subtitle {
    font-size: 16px;
    font-weight: 500;
    letter-spacing: 3px;
    color: rgba(255, 255, 255, 0.7);
    text-transform: uppercase;
    margin-bottom: 15px;
    animation: fadeInUp 1s ease 0.2s both;
}

.hero-title {
    font-size: clamp(48px, 8vw, 100px);
    font-weight: 700;
    letter-spacing: -2px;
    line-height: 1.1;
    margin-bottom: 25px;
    animation: fadeInUp 1s ease 0.4s both;
    background: linear-gradient(135deg, #ffffff 0%, #a8a8a8 25%, #ffffff 50%, #d4d4d4 75%, #ffffff 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    background-size: 200% 200%;
    animation: gradientShift 4s ease infinite;
}

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

.hero-description {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.7);
    max-width: 500px;
    margin-bottom: 40px;
    animation: fadeInUp 1s ease 0.6s both;
}

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

/* 大气CTA按钮 - SpaceX风格 */
.cta-button {
    display: inline-block;
    padding: 18px 45px;
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    background: var(--color-white);
    color: var(--color-black);
    border: none;
    cursor: pointer;
    transition: all 0.4s ease;
    animation: fadeInUp 1s ease 0.8s both;
}

.cta-button:hover {
    background: #e6e6e6;
    transform: scale(1.02);
}

/* Section通用 */
.section {
    padding: 150px 40px;
    min-height: 100vh;
    display: flex;
    align-items: center;
    background: var(--color-black);
    position: relative;
}

/* Section分隔线 */
.section::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.1) 20%, rgba(255,255,255,0.1) 80%, transparent 100%);
}

/* Section序号标签 */
.section-label {
    position: absolute;
    top: 40px;
    left: 40px;
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 3px;
    color: rgba(255, 255, 255, 0.3);
    text-transform: uppercase;
}

.section-dark {
    background: var(--color-dark);
}

/* 深色区块增加纹理 */
.section-dark::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 30%, rgba(255,255,255,0.02) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(255,255,255,0.02) 0%, transparent 50%);
    pointer-events: none;
}

.section-dark::after {
    background: linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.05) 20%, rgba(255,255,255,0.05) 80%, transparent 100%);
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
}

/* 关于我们 - 大气卡片 */
.about-section {
    position: relative;
    z-index: 1;
}

.section-header {
    margin-bottom: 100px;
    padding-left: 20px;
    border-left: 2px solid rgba(255, 255, 255, 0.2);
}

.section-title {
    font-size: clamp(36px, 5vw, 56px);
    font-weight: 700;
    letter-spacing: -1px;
    margin-bottom: 20px;
}

.section-desc {
    font-size: 18px;
    color: rgba(255, 255, 255, 0.6);
    max-width: 600px;
    line-height: 1.8;
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    background: transparent;
}

.about-grid::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
}

.about-item {
    background: var(--color-black);
    padding: 80px 50px;
    transition: all 0.5s ease;
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.about-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--color-white);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.5s ease;
}

.about-item:hover {
    background: #0a0a0a;
}

.about-item:hover::before {
    transform: scaleX(1);
}

.about-number {
    font-size: 100px;
    font-weight: 700;
    color: rgba(255, 255, 255, 0.1);
    line-height: 1;
    margin-bottom: 30px;
    position: absolute;
    top: 30px;
    right: 40px;
}

.about-item h3 {
    font-size: 28px;
    font-weight: 600;
    margin-bottom: 20px;
    letter-spacing: 1px;
}

.about-item p {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.6);
    line-height: 1.8;
}

/* 产品服务 - 全宽卡片 */
.products-section {
    position: relative;
    z-index: 1;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
}

.product-card {
    background: var(--color-dark);
    padding: 60px 40px;
    min-height: 400px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: all 0.5s ease;
    position: relative;
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-left: 1px solid rgba(255, 255, 255, 0.05);
}

.product-card:first-child {
    border-left: 1px solid rgba(255, 255, 255, 0.05);
}

.product-card:hover {
    background: #0f0f0f;
}

.product-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--color-white);
    transform: scaleX(0);
    transition: transform 0.5s ease;
}

.product-card:hover::after {
    transform: scaleX(1);
}

.product-icon {
    font-size: 40px;
    margin-bottom: 40px;
    opacity: 0.8;
}

.product-card h3 {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: 20px;
    letter-spacing: 0.5px;
}

.product-card p {
    font-size: 15px;
    color: rgba(255, 255, 255, 0.5);
    line-height: 1.7;
}

.product-link {
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    margin-top: 40px;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.3s ease;
}

.product-card:hover .product-link {
    opacity: 1;
    transform: translateY(0);
}

/* 技术实力 - 大数字展示 */
.tech-section {
    position: relative;
    text-align: center;
    z-index: 1;
}

.tech-section .section-title {
    margin-bottom: 120px;
}

.tech-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1px;
    background: rgba(255, 255, 255, 0.1);
    position: relative;
}

.stat-item {
    padding: 60px 40px;
    background: var(--color-black);
    text-align: center;
    transition: all 0.5s ease;
    position: relative;
}

.stat-item:hover {
    background: #0a0a0a;
}

.stat-item::after {
    content: '';
    position: absolute;
    right: 0;
    top: 20%;
    height: 60%;
    width: 1px;
    background: rgba(255, 255, 255, 0.1);
}

.stat-item:last-child::after {
    display: none;
}

.stat-number {
    font-size: clamp(48px, 6vw, 80px);
    font-weight: 700;
    line-height: 1;
    margin-bottom: 20px;
    letter-spacing: -2px;
}

.stat-label {
    font-size: 16px;
    font-weight: 500;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.5);
}

/* 联系我们 - 全屏背景 */
.contact-section {
    position: relative;
    min-height: 80vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    background: 
        radial-gradient(ellipse at center, #1a1a2e 0%, #0f0f1a 50%, #000000 100%);
    z-index: 1;
}

.contact-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
}

.contact-content {
    max-width: 700px;
}

.contact-title {
    font-size: clamp(40px, 6vw, 72px);
    font-weight: 700;
    letter-spacing: -2px;
    margin-bottom: 30px;
}

.contact-text {
    font-size: 20px;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 60px;
    line-height: 1.8;
}

.cta-button-large {
    display: inline-block;
    padding: 22px 60px;
    font-size: 16px;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    background: var(--color-white);
    color: var(--color-black);
    border: none;
    cursor: pointer;
    transition: all 0.4s ease;
}

.cta-button-large:hover {
    background: #e6e6e6;
    transform: scale(1.02);
}

/* 页脚 */
.footer {
    background: var(--color-black);
    padding: 80px 40px 40px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    max-width: 1400px;
    margin: 0 auto 60px;
}

.footer-brand {
    font-size: 18px;
    font-weight: 700;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.footer-links {
    display: flex;
    gap: 50px;
    list-style: none;
}

.footer-links a {
    font-size: 14px;
    color: rgba(255, 255, 255, 0.5);
    letter-spacing: 1px;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--color-white);
}

.footer-bottom {
    max-width: 1400px;
    margin: 0 auto;
    padding-top: 30px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 13px;
    color: rgba(255, 255, 255, 0.4);
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.4);
    transition: color 0.3s ease;
}

.footer-bottom a:hover {
    color: var(--color-white);
}

/* 响应式 */
@media (max-width: 1024px) {
    .about-grid {
        grid-template-columns: 1fr;
        gap: 2px;
    }
    
    .products-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .tech-stats {
        grid-template-columns: repeat(2, 1fr);
        gap: 40px;
    }
    
    .footer-content {
        flex-direction: column;
        gap: 40px;
    }
    
    .footer-links {
        flex-wrap: wrap;
        gap: 20px;
    }
}

@media (max-width: 768px) {
    .navbar {
        padding: 15px 20px;
    }
    
    .nav-menu {
        display: none;
    }
    
    .hero-content {
        padding: 0 20px;
    }
    
    .section {
        padding: 100px 20px;
    }
    
    .products-grid {
        grid-template-columns: 1fr;
    }
    
    .tech-stats {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        flex-direction: column;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 15px;
        text-align: center;
    }
}