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

:root {
    /* Apple风格颜色变量 */
    --apple-black: #1d1d1f;
    --apple-gray: #86868b;
    --apple-blue: #0071e3;
    --white: #ffffff;
    
    /* 暗黑风格 - Apple网站实际使用的变量 */
    --sk-body-background-color: rgb(0, 0, 0);
    --sk-body-text-color: rgb(245, 245, 247);
    --sk-fill: rgb(28, 28, 30);
    --sk-fill-secondary: rgb(44, 44, 46);
    --sk-fill-tertiary: rgb(58, 58, 60);
    
    /* 文字颜色 */
    --text-primary: var(--sk-body-text-color);
    --text-secondary: rgb(174, 174, 178);
    
    /* 兼容变量 */
    --apple-bg: var(--sk-body-background-color);
    --apple-gray-light: var(--sk-fill);
    --apple-gray-medium: var(--sk-fill-tertiary);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Display', 'SF Pro Text', 'Helvetica Neue', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    color: var(--sk-body-text-color, var(--text-primary));
    line-height: 1.47059;
    font-weight: 400;
    letter-spacing: -0.022em;
    background-color: var(--sk-body-background-color, var(--apple-bg));
    overflow-x: hidden;
}

/* 大区块氛围背景（非Hero，避免与Hero动画风格重复） */
.section-ambient {
    position: relative;
    overflow: hidden;
    isolation: isolate;
}

.section-ambient::before {
    content: '';
    position: absolute;
    inset: -20%;
    z-index: 0;
    pointer-events: none;
    opacity: 0.9;
    background:
        radial-gradient(900px 600px at calc(20% + var(--mx, 0px)) calc(15% + var(--my, 0px)), rgba(0, 150, 255, 0.18) 0%, rgba(0, 150, 255, 0) 60%),
        radial-gradient(800px 520px at calc(85% - var(--mx, 0px)) calc(25% + var(--my, 0px)), rgba(147, 51, 234, 0.16) 0%, rgba(147, 51, 234, 0) 62%),
        radial-gradient(760px 520px at calc(70% + var(--mx, 0px)) calc(85% - var(--my, 0px)), rgba(34, 211, 238, 0.14) 0%, rgba(34, 211, 238, 0) 58%),
        radial-gradient(820px 520px at 15% 85%, rgba(255, 45, 85, 0.08) 0%, rgba(255, 45, 85, 0) 55%);
    filter: blur(18px) saturate(120%);
    transform: translate3d(0, 0, 0);
    animation: ambientDrift 18s cubic-bezier(0.16, 1, 0.3, 1) infinite alternate;
    will-change: transform, filter;
}

.section-ambient::after {
    content: '';
    position: absolute;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    opacity: 0.45;
    background:
        radial-gradient(circle at 20% 30%, rgba(255, 255, 255, 0.05) 0 1px, transparent 1px 100%),
        radial-gradient(circle at 70% 60%, rgba(255, 255, 255, 0.04) 0 1px, transparent 1px 100%),
        radial-gradient(circle at 40% 80%, rgba(255, 255, 255, 0.03) 0 1px, transparent 1px 100%);
    background-size: 120px 120px, 180px 180px, 240px 240px;
    mix-blend-mode: screen;
    animation: ambientGrain 10s linear infinite;
    will-change: background-position, opacity;
}

/* 确保内容在氛围层之上 */
.section-ambient > .container {
    position: relative;
    z-index: 1;
}

@keyframes ambientDrift {
    0% {
        transform: translate3d(-1.5%, -1.2%, 0) scale(1.02);
        filter: blur(18px) saturate(120%);
    }
    50% {
        transform: translate3d(1.2%, 0.8%, 0) scale(1.04);
        filter: blur(22px) saturate(135%);
    }
    100% {
        transform: translate3d(2.2%, -0.6%, 0) scale(1.03);
        filter: blur(20px) saturate(125%);
    }
}

@keyframes ambientGrain {
    0% {
        background-position: 0 0, 0 0, 0 0;
        opacity: 0.35;
    }
    50% {
        background-position: 60px 40px, -40px 70px, 30px -50px;
        opacity: 0.5;
    }
    100% {
        background-position: 120px 90px, -80px 140px, 60px -100px;
        opacity: 0.4;
    }
}

@media (prefers-reduced-motion: reduce) {
    .section-ambient::before,
    .section-ambient::after {
        animation: none !important;
    }
}

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

/* 导航栏 - 暗黑风格 */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(0, 0, 0, 0.72);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    z-index: 1000;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.navbar.scrolled {
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
}

.nav-container {
    max-width: 100%;
    margin: 0 auto;
    padding: 0 44px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 44px;
}

@media (max-width: 1068px) {
    .nav-container {
        padding: 0 32px;
    }
}

@media (max-width: 768px) {
    .nav-container {
        padding: 0 22px;
    }
}

.nav-logo {
    font-size: 17px;
    font-weight: 400;
    color: var(--sk-body-text-color);
    letter-spacing: -0.01em;
    transition: opacity 0.3s ease;
}

.nav-logo:hover {
    opacity: 0.8;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 0;
    align-items: center;
}

.nav-menu li {
    margin: 0;
}

.nav-menu a {
    text-decoration: none;
    color: var(--sk-body-text-color);
    font-size: 12px;
    font-weight: 400;
    transition: opacity 0.3s ease;
    letter-spacing: -0.01em;
    padding: 0 10px;
    display: block;
    line-height: 44px;
}

.nav-menu a:hover {
    opacity: 0.65;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
}

.nav-toggle span {
    width: 22px;
    height: 1px;
    background: var(--sk-body-text-color);
    transition: all 0.3s ease;
}

/* Hero 区域 - 暗黑风格 */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    text-align: center;
    padding: 120px 0 0;
    background: var(--sk-body-background-color);
    position: relative;
    overflow: hidden;
}

/* 背景动画层 */
.hero-background-animation {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
    overflow: hidden;
}

/* 渐变光球效果 */
.hero-gradient-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.4;
    animation: orbFloat 20s ease-in-out infinite, orbPulse 8s ease-in-out infinite;
    will-change: transform, opacity;
}

@keyframes orbPulse {
    0%, 100% {
        opacity: 0.4;
        transform: scale(1);
    }
    50% {
        opacity: 0.7;
        transform: scale(1.1);
    }
}

.hero-gradient-orb-1 {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(0, 150, 255, 0.7) 0%, rgba(0, 150, 255, 0) 70%);
    top: -200px;
    left: -200px;
    animation: orbFloat 25s ease-in-out infinite;
}

.hero-gradient-orb-2 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(147, 51, 234, 0.6) 0%, rgba(147, 51, 234, 0) 70%);
    bottom: -150px;
    right: -150px;
    animation: orbFloat 30s ease-in-out infinite reverse;
}

.hero-gradient-orb-3 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(34, 211, 238, 0.6) 0%, rgba(34, 211, 238, 0) 70%);
    top: 50%;
    left: 50%;
    animation: orbFloat3 35s ease-in-out infinite;
}

@keyframes orbFloat3 {
    0%, 100% {
        transform: translate(-50%, -50%) scale(1);
    }
    25% {
        transform: translate(calc(-50% + 50px), calc(-50% - 50px)) scale(1.1);
    }
    50% {
        transform: translate(calc(-50% - 30px), calc(-50% + 30px)) scale(0.9);
    }
    75% {
        transform: translate(calc(-50% + 30px), calc(-50% + 50px)) scale(1.05);
    }
}

@keyframes orbFloat {
    0%, 100% {
        transform: translate(0, 0) scale(1);
    }
    25% {
        transform: translate(50px, -50px) scale(1.1);
    }
    50% {
        transform: translate(-30px, 30px) scale(0.9);
    }
    75% {
        transform: translate(30px, 50px) scale(1.05);
    }
}

/* 网格图案 */
.hero-grid-pattern {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(rgba(0, 150, 255, 0.08) 1px, transparent 1px),
        linear-gradient(90deg, rgba(147, 51, 234, 0.06) 1px, transparent 1px);
    background-size: 50px 50px;
    animation: gridMove 20s linear infinite, gridFade 12s ease-in-out infinite;
    opacity: 0.6;
    will-change: transform, opacity;
}

@keyframes gridFade {
    0%, 100% {
        opacity: 0.6;
    }
    50% {
        opacity: 0.4;
    }
}

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

/* 光线效果 */
.hero-light-rays {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        linear-gradient(45deg, transparent 30%, rgba(0, 150, 255, 0.25) 50%, transparent 70%),
        linear-gradient(-45deg, transparent 30%, rgba(147, 51, 234, 0.2) 50%, transparent 70%);
    background-size: 200% 200%;
    animation: lightRays 15s ease-in-out infinite, lightRaysPulse 10s ease-in-out infinite;
    opacity: 0.8;
    will-change: background-position, opacity;
}

@keyframes lightRaysPulse {
    0%, 100% {
        opacity: 0.8;
    }
    50% {
        opacity: 1;
    }
}

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

.hero-content {
    max-width: 1000px;
    margin-bottom: 100px;
    position: relative;
    z-index: 3;
}

.hero-title {
    font-size: 128px;
    font-weight: 600;
    line-height: 1.05;
    letter-spacing: -0.02em;
    margin-bottom: 20px;
    color: var(--sk-body-text-color);
    animation: heroTitleFadeIn 1.4s cubic-bezier(0.16, 1, 0.3, 1) 0.2s both;
    opacity: 0;
}

.hero-subtitle {
    font-size: 40px;
    font-weight: 400;
    line-height: 1.14286;
    letter-spacing: 0.007em;
    color: var(--text-secondary);
    margin-bottom: 60px;
    animation: heroSubtitleFadeIn 1.4s cubic-bezier(0.16, 1, 0.3, 1) 0.4s both;
    opacity: 0;
}

@keyframes heroTitleFadeIn {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

.hero-buttons {
    display: flex;
    gap: 24px;
    justify-content: center;
    flex-wrap: wrap;
    animation: heroButtonsFadeIn 1.4s cubic-bezier(0.16, 1, 0.3, 1) 0.6s both;
    opacity: 0;
}

@keyframes heroButtonsFadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.btn {
    padding: 12px 22px;
    border-radius: 980px;
    text-decoration: none;
    font-size: 17px;
    font-weight: 400;
    letter-spacing: -0.022em;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    display: inline-block;
    border: none;
    cursor: pointer;
    min-width: 140px;
    position: relative;
    overflow: hidden;
    transform: translateY(0);
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    transform: translate(-50%, -50%);
    transition: width 0.6s ease, height 0.6s ease;
}

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

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

.btn:active {
    transform: translateY(-1px);
}

.btn-primary {
    background: var(--apple-blue);
    color: white;
    z-index: 1;
}

.btn-primary:hover {
    background: #0077ed;
    box-shadow: 0 8px 24px rgba(0, 113, 227, 0.5);
}

.btn-secondary {
    background: transparent;
    color: var(--apple-blue);
    border: 1px solid var(--apple-blue);
    z-index: 1;
}

.btn-secondary:hover {
    background: var(--apple-blue);
    color: white;
    box-shadow: 0 8px 24px rgba(0, 113, 227, 0.4);
}

/* 图片样式 - 暗黑风格 */
.hero-image-wrapper,
.feature-image-wrapper,
.design-image-wrapper,
.detail-image-wrapper,
.performance-image-wrapper,
.equipment-showcase-wrapper,
.equipment-image-wrapper,
.support-image-wrapper,
.about-image-wrapper {
    width: 100%;
    position: relative;
    overflow: hidden;
}

/* 懒加载图片优化 */
img[loading="lazy"] {
    opacity: 0;
    transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

img[loading="lazy"].loaded {
    opacity: 1;
}

/* Hero 主图 */
.hero-image-wrapper {
    height: 85vh;
    min-height: 700px;
    margin-top: 80px;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.hero-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    display: block;
    animation: heroImageFadeIn 1.2s cubic-bezier(0.16, 1, 0.3, 1);
    transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.hero-image-wrapper:hover .hero-image {
    transform: scale(1.05);
}

@keyframes heroImageFadeIn {
    from {
        opacity: 0;
        transform: scale(1.1);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* 功能图片 */
.feature-image-wrapper {
    height: 400px;
    margin-bottom: 32px;
    border-radius: 18px;
    overflow: hidden;
}

.feature-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    display: block;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.feature-item:hover .feature-image {
    transform: scale(1.05);
}

/* 设计展示图 */
.design-image-wrapper {
    height: 700px;
    margin: 80px 0;
    width: 100%;
}

.design-image-grid {
    display: flex;
    gap: 0;
}

.design-image-grid .design-image {
    flex: 1;
    width: 25%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    display: block;
}

/* 详情图片 */
.detail-image-wrapper {
    height: 350px;
    margin-bottom: 40px;
    border-radius: 18px;
    overflow: hidden;
}

.detail-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    display: block;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.detail-item:hover .detail-image {
    transform: scale(1.03);
}

/* 性能展示图 */
.performance-image-wrapper {
    height: 700px;
    margin: 80px 0;
    width: 100%;
}

.performance-image-grid {
    display: flex;
    gap: 0;
}

.performance-image-grid .performance-image {
    flex: 1;
    width: 25%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    display: block;
}

/* 设备展示图 */
.equipment-showcase-wrapper {
    height: 800px;
    margin: 80px 0;
    width: 100%;
}

.equipment-showcase-grid {
    display: flex;
    gap: 0;
}

.equipment-showcase-grid .equipment-showcase-image {
    flex: 1;
    width: 25%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    display: block;
}

/* 设备分类图片 */
.equipment-image-wrapper {
    height: 500px;
    margin-top: 40px;
    width: 100%;
    border-radius: 18px;
    overflow: hidden;
}

.equipment-image-grid {
    display: flex;
    gap: 0;
    border-radius: 18px;
    overflow: hidden;
}

.equipment-image-grid .equipment-image {
    flex: 1;
    width: 25%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    display: block;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.equipment-category:hover .equipment-image-grid .equipment-image {
    transform: scale(1.02);
}

/* 技术支持图片 */
.support-image-wrapper {
    height: 700px;
    margin: 80px 0;
    width: 100%;
}

.support-image-grid {
    display: flex;
    gap: 0;
}

.support-image-grid .support-image {
    flex: 1;
    width: 25%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    display: block;
}

/* 关于我们图片 */
.about-image-wrapper {
    height: 700px;
    margin: 80px 0;
    width: 100%;
}

.about-image-grid {
    display: flex;
    gap: 0;
}

.about-image-grid .about-image {
    flex: 1;
    width: 25%;
    height: 100%;
    object-fit: cover;
    object-position: center;
    display: block;
}

/* 重点功能区域 - 暗黑风格 */
.features-intro {
    padding: 140px 44px;
    background-color: var(--sk-body-background-color);
    position: relative;
    z-index: 2;
}

.section-title {
    font-size: 80px;
    font-weight: 600;
    line-height: 1.05;
    letter-spacing: -0.015em;
    text-align: center;
    margin-bottom: 80px;
    color: var(--sk-body-text-color);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 80px;
    margin-top: 100px;
}

.feature-item {
    text-align: center;
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.feature-item:hover {
    transform: translateY(-8px);
}

.feature-item h3 {
    font-size: 32px;
    font-weight: 600;
    line-height: 1.125;
    letter-spacing: 0.004em;
    margin: 40px 0 20px;
    color: var(--sk-body-text-color);
    transition: color 0.3s ease;
}

.feature-item:hover h3 {
    color: var(--apple-blue);
}

.feature-item p {
    font-size: 21px;
    line-height: 1.381;
    letter-spacing: 0.011em;
    color: var(--text-secondary);
}

/* 设计部分 - 暗黑风格 */
.design-section {
    padding: 140px 44px;
    background-color: var(--sk-fill);
}

.performance-section {
    padding: 140px 44px;
    background-color: var(--sk-body-background-color);
}

.equipment-section {
    padding: 140px 44px;
    background-color: var(--sk-fill);
}

.support-section {
    padding: 140px 44px;
    background-color: var(--sk-body-background-color);
}

.about-section {
    padding: 140px 44px;
    background-color: var(--sk-fill);
}

.section-title-large {
    font-size: 128px;
    font-weight: 600;
    line-height: 1.05;
    letter-spacing: -0.02em;
    text-align: center;
    margin-bottom: 20px;
    color: var(--sk-body-text-color);
}

.section-subtitle-large {
    font-size: 40px;
    font-weight: 400;
    line-height: 1.14286;
    letter-spacing: 0.007em;
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.section-description {
    font-size: 28px;
    line-height: 1.42857;
    letter-spacing: 0.007em;
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 60px;
    max-width: 900px;
    margin-left: auto;
    margin-right: auto;
}

.design-details {
    margin-top: 120px;
}

.design-details h3 {
    font-size: 64px;
    font-weight: 600;
    line-height: 1.0625;
    letter-spacing: -0.009em;
    text-align: center;
    margin-bottom: 80px;
    color: var(--sk-body-text-color);
}

.detail-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 80px;
}

.detail-image-placeholder {
    height: 350px;
    margin-bottom: 40px;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.detail-item:hover .detail-image-placeholder {
    transform: scale(1.03);
}

.detail-item {
    transition: transform 0.3s ease;
}

.detail-item:hover {
    transform: translateY(-4px);
}

.detail-item h4 {
    font-size: 32px;
    font-weight: 600;
    line-height: 1.125;
    letter-spacing: 0.004em;
    margin: 40px 0 20px;
    color: var(--sk-body-text-color);
}

.detail-item p {
    font-size: 21px;
    line-height: 1.381;
    letter-spacing: 0.011em;
    color: var(--text-secondary);
}

/* 性能部分 */
.performance-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
    gap: 100px;
    margin-top: 140px;
}

.performance-item {
    transition: transform 0.3s ease;
}

.performance-item:hover {
    transform: translateX(8px);
}

.performance-item h3 {
    font-size: 48px;
    font-weight: 600;
    line-height: 1.08349;
    letter-spacing: -0.003em;
    margin-bottom: 28px;
    color: var(--sk-body-text-color);
    transition: color 0.3s ease;
}

.performance-item:hover h3 {
    color: var(--apple-blue);
}

.performance-item p {
    font-size: 24px;
    line-height: 1.41667;
    letter-spacing: 0.009em;
    color: var(--text-secondary);
}

/* 设备租赁部分 */
.equipment-list {
    margin-top: 120px;
}

.equipment-category {
    margin-bottom: 160px;
    text-align: center;
    transition: transform 0.3s ease;
}

.equipment-category:hover {
    transform: translateY(-8px);
}

.equipment-category h3 {
    font-size: 64px;
    font-weight: 600;
    line-height: 1.0625;
    letter-spacing: -0.009em;
    margin-bottom: 24px;
    color: var(--sk-body-text-color);
    transition: color 0.3s ease;
}

.equipment-category:hover h3 {
    color: var(--apple-blue);
}

.equipment-category p {
    font-size: 28px;
    line-height: 1.42857;
    letter-spacing: 0.007em;
    color: var(--text-secondary);
    margin-bottom: 80px;
}

/* 技术支持部分 */
.support-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(380px, 1fr));
    gap: 100px;
    margin-top: 140px;
}

.support-item {
    transition: transform 0.3s ease;
}

.support-item:hover {
    transform: translateX(8px);
}

.support-item h3 {
    font-size: 48px;
    font-weight: 600;
    line-height: 1.08349;
    letter-spacing: -0.003em;
    margin-bottom: 28px;
    color: var(--sk-body-text-color);
    transition: color 0.3s ease;
}

.support-item:hover h3 {
    color: var(--apple-blue);
}

.support-item p {
    font-size: 24px;
    line-height: 1.41667;
    letter-spacing: 0.009em;
    color: var(--text-secondary);
}

/* 关于我们部分 */
.about-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 80px;
    margin-top: 120px;
}

.stat-item {
    text-align: center;
    transition: transform 0.3s ease;
}

.stat-item:hover {
    transform: translateY(-8px);
}

.stat-number {
    font-size: 96px;
    font-weight: 600;
    line-height: 1.04167;
    letter-spacing: -0.015em;
    color: var(--sk-body-text-color);
    margin-bottom: 20px;
    transition: color 0.3s ease;
}

.stat-item:hover .stat-number {
    color: var(--apple-blue);
}

.stat-label {
    font-size: 24px;
    line-height: 1.41667;
    letter-spacing: 0.009em;
    color: var(--text-secondary);
}

/* 联系我们部分 - 暗黑风格 */
.contact-section {
    padding: 140px 44px;
    background-color: var(--sk-body-background-color);
    position: relative;
    overflow: hidden;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: 80px;
    margin-top: 120px;
    max-width: 1000px;
    margin-left: auto;
    margin-right: auto;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
}

.contact-item {
    padding: 40px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 20px;
    transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    position: relative;
    overflow: hidden;
}

.contact-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--apple-blue), transparent);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.contact-item:hover {
    background: rgba(255, 255, 255, 0.04);
    border-color: rgba(0, 150, 255, 0.3);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

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

.contact-item-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 12px;
}

.contact-icon {
    font-size: 32px;
    display: inline-block;
    transition: transform 0.3s ease;
    flex-shrink: 0;
}

.contact-item:hover .contact-icon {
    transform: scale(1.1) rotate(5deg);
}

.contact-item h3 {
    font-size: 24px;
    font-weight: 600;
    line-height: 1.125;
    letter-spacing: 0.004em;
    margin: 0;
    color: var(--sk-body-text-color);
}

.contact-item p {
    font-size: 20px;
    line-height: 1.5;
    letter-spacing: 0.009em;
    color: var(--text-secondary);
    margin: 0;
}

.contact-link {
    color: var(--apple-blue);
    text-decoration: none;
    transition: all 0.3s ease;
    position: relative;
    display: inline-block;
}

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

.contact-link:hover {
    color: var(--apple-blue);
    text-shadow: 0 0 8px rgba(0, 150, 255, 0.5);
}

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

.contact-value {
    display: inline-block;
    transition: color 0.3s ease;
}

.contact-item:hover .contact-value {
    color: var(--sk-body-text-color);
}

.contact-form {
    display: none; /* 暂时隐藏表单 */
    flex-direction: column;
    gap: 20px;
}

.contact-form input,
.contact-form textarea {
    width: 100%;
    padding: 16px 20px;
    border: 1px solid #d2d2d7;
    border-radius: 12px;
    font-size: 17px;
    font-family: inherit;
    background: white;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    color: var(--sk-body-text-color);
}

.contact-form input::placeholder,
.contact-form textarea::placeholder {
    color: var(--text-secondary);
    opacity: 0.6;
}

.contact-form input:focus,
.contact-form textarea:focus {
    outline: none;
    border-color: var(--apple-blue);
    box-shadow: 0 0 0 4px rgba(0, 113, 227, 0.1);
    transform: translateY(-2px);
}

.contact-form textarea {
    resize: vertical;
    min-height: 120px;
}

/* 页脚 - 暗黑风格 */
.footer {
    background-color: var(--sk-body-background-color);
    padding: 60px 44px 40px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

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

.footer-section h4 {
    font-size: 12px;
    font-weight: 600;
    letter-spacing: 0.01em;
    margin-bottom: 16px;
    color: var(--sk-body-text-color);
}

.footer-section p {
    font-size: 12px;
    line-height: 1.33337;
    letter-spacing: -0.01em;
    color: var(--text-secondary);
}

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

.footer-section ul li {
    font-size: 12px;
    line-height: 1.33337;
    letter-spacing: -0.01em;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.footer-section a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: var(--apple-blue);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(0, 0, 0, 0.1);
}

.footer-bottom p {
    font-size: 12px;
    color: var(--text-secondary);
    margin: 8px 0;
}

.footer-bottom p:last-child {
    margin-top: 12px;
}

.footer-bottom a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-bottom a:hover {
    color: var(--sk-body-text-color);
    text-decoration: underline;
}

/* 动画 */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* 平滑滚动优化 */
html {
    scroll-padding-top: 44px;
}

/* 性能优化 */
* {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 选择文本样式 */
::selection {
    background: rgba(0, 113, 227, 0.2);
    color: var(--sk-body-text-color);
}

/* 响应式设计 */
@media (max-width: 1068px) {
    .hero-title {
        font-size: 96px;
    }
    
    .hero-subtitle {
        font-size: 32px;
    }
    
    .section-title {
        font-size: 64px;
    }
    
    .section-title-large {
        font-size: 96px;
    }
    
    .section-subtitle-large {
        font-size: 32px;
    }
    
    .container {
        padding: 0;
    }
    
    .nav-container {
        padding: 0 32px;
    }
    
    .features-intro,
    .design-section,
    .performance-section,
    .equipment-section,
    .support-section,
    .about-section,
    .contact-section {
        padding-left: 32px;
        padding-right: 32px;
    }
    
    .footer {
        padding-left: 32px;
        padding-right: 32px;
    }
}

@media (max-width: 768px) {
    /* 移动端优化背景动画 */
    .hero-gradient-orb {
        filter: blur(60px);
        opacity: 0.2;
    }
    
    .hero-gradient-orb-1,
    .hero-gradient-orb-2,
    .hero-gradient-orb-3 {
        width: 300px;
        height: 300px;
    }
    
    .hero-grid-pattern {
        background-size: 30px 30px;
        opacity: 0.3;
    }
    
    .hero-light-rays {
        opacity: 0.4;
    }
    
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 44px;
        flex-direction: column;
        background: rgba(0, 0, 0, 0.98);
        backdrop-filter: saturate(180%) blur(20px);
        -webkit-backdrop-filter: saturate(180%) blur(20px);
        width: 100%;
        padding: 60px 32px;
        gap: 40px;
        transition: left 0.4s cubic-bezier(0.4, 0, 0.2, 1);
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
        box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .nav-toggle {
        display: flex;
    }
    
    .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);
    }
    
    .hero {
        padding: 120px 32px 0;
        min-height: auto;
    }
    
    .hero-content {
        margin-bottom: 60px;
    }
    
    .hero-title {
        font-size: 64px;
    }
    
    .hero-subtitle {
        font-size: 28px;
    }
    
    .hero-image-wrapper {
        height: 60vh;
        min-height: 400px;
        margin-top: 40px;
    }
    
    .section-title {
        font-size: 56px;
    }
    
    .section-title-large {
        font-size: 64px;
    }
    
    .section-subtitle-large {
        font-size: 28px;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: 60px;
    }
    
    .contact-info {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .contact-item {
        padding: 32px;
    }
    
    .contact-item-header {
        gap: 12px;
        margin-bottom: 10px;
    }
    
    .contact-icon {
        font-size: 28px;
    }
    
    .contact-item h3 {
        font-size: 20px;
    }
    
    .contact-item p {
        font-size: 18px;
    }
    
    .hero-image-wrapper {
        height: 500px;
    }
    
    .design-image-wrapper,
    .performance-image-wrapper,
    .equipment-showcase-wrapper,
    .support-image-wrapper,
    .about-image-wrapper {
        height: 450px;
        margin: 60px 0;
    }
    
    /* 拼接图片在平板端保持横向排列 */
    .hero-image-grid,
    .design-image-grid,
    .performance-image-grid,
    .equipment-showcase-grid,
    .support-image-grid,
    .about-image-grid,
    .equipment-image-grid {
        flex-direction: row;
    }
    
    .feature-image-wrapper {
        height: 300px;
    }
    
    .detail-image-wrapper {
        height: 250px;
    }
    
    .equipment-image-wrapper {
        height: 350px;
    }
    
    .container {
        padding: 0;
    }
    
    .features-intro,
    .design-section,
    .performance-section,
    .equipment-section,
    .support-section,
    .about-section,
    .contact-section {
        padding-left: 22px;
        padding-right: 22px;
    }
    
    .footer {
        padding-left: 22px;
        padding-right: 22px;
    }
}

@media (max-width: 480px) {
    .hero {
        padding: 100px 22px 0;
        min-height: auto;
    }
    
    .hero-content {
        margin-bottom: 40px;
    }
    
    .hero-title {
        font-size: 48px;
    }
    
    .hero-subtitle {
        font-size: 24px;
    }
    
    .hero-image-wrapper {
        height: 50vh;
        min-height: 300px;
        margin-top: 30px;
    }
    
    .design-image-wrapper,
    .performance-image-wrapper,
    .equipment-showcase-wrapper,
    .support-image-wrapper,
    .about-image-wrapper {
        height: 350px;
        margin: 40px 0;
    }
    
    /* 拼接图片在移动端保持横向排列，但高度降低 */
    .hero-image-grid,
    .design-image-grid,
    .performance-image-grid,
    .equipment-showcase-grid,
    .support-image-grid,
    .about-image-grid,
    .equipment-image-grid {
        flex-direction: row;
    }
    
    .hero-image-grid .hero-image,
    .design-image-grid .design-image,
    .performance-image-grid .performance-image,
    .equipment-showcase-grid .equipment-showcase-image,
    .support-image-grid .support-image,
    .about-image-grid .about-image,
    .equipment-image-grid .equipment-image {
        width: 25%;
        flex: 1;
    }
    
    .feature-image-wrapper {
        height: 250px;
    }
    
    .detail-image-wrapper {
        height: 200px;
    }
    
    .equipment-image-wrapper {
        height: 300px;
    }
    
    .section-title {
        font-size: 40px;
    }
    
    .section-title-large {
        font-size: 48px;
    }
    
    .section-subtitle-large {
        font-size: 24px;
    }
    
    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .btn {
        width: 100%;
    }
    
    .container {
        padding: 0;
    }
    
    .nav-container {
        padding: 0 22px;
    }
    
    .features-intro,
    .design-section,
    .performance-section,
    .equipment-section,
    .support-section,
    .about-section,
    .contact-section {
        padding-left: 22px;
        padding-right: 22px;
    }
    
    .footer {
        padding-left: 22px;
        padding-right: 22px;
    }
}