/* Apple 风格设计系统 */
:root {
    --color-bg: #ffffff;
    --color-bg-secondary: #f5f5f7;
    --color-text: #1d1d1f;
    --color-text-secondary: #86868b;
    --color-accent: #FF6B6B;
    --color-accent-hover: #FF5252;
    --color-accent-2: #4ECDC4;
    --color-accent-3: #45B7D1;
    --color-border: #d2d2d7;
    
    --font-primary: "Inter", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;
    
    --radius: 12px;
    --radius-lg: 20px;
    --radius-xl: 24px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.12);
    --shadow-xl: 0 16px 64px rgba(0, 0, 0, 0.16);
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-primary);
    font-size: 17px;
    line-height: 1.47059;
    font-weight: 400;
    letter-spacing: -0.022em;
    color: var(--color-text);
    background-color: var(--color-bg);
}

/* 导航栏 */
.global-nav {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.8);
    backdrop-filter: saturate(180%) blur(20px);
    -webkit-backdrop-filter: saturate(180%) blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.global-nav.scrolled {
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
    border-bottom-color: rgba(0, 0, 0, 0.08);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 44px;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    text-decoration: none;
    color: var(--color-text);
    font-weight: 600;
    font-size: 18px;
}

.logo-img {
    width: 28px;
    height: 28px;
}

.logo-text {
    letter-spacing: -0.01em;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: var(--spacing-xl);
    align-items: center;
}

.nav-links a {
    color: var(--color-text);
    text-decoration: none;
    font-size: 12px;
    font-weight: 400;
    letter-spacing: -0.01em;
    transition: var(--transition);
    position: relative;
}

.nav-links a {
    position: relative;
    transition: var(--transition-fast);
}

.nav-links a::before {
    content: '';
    position: absolute;
    bottom: -12px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--color-accent), var(--color-accent-2));
    transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.nav-links a:hover::before,
.nav-links a.active::before {
    width: 100%;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--color-accent);
    transform: translateY(-2px);
}

.nav-links a.active::after {
    content: '';
    position: absolute;
    bottom: -12px;
    left: 0;
    right: 0;
    height: 2px;
    background-color: var(--color-accent);
}

/* Hero 区域 */
.hero {
    position: relative;
    min-height: 90vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-3xl) var(--spacing-lg);
    overflow: hidden;
}

.hero-content {
    max-width: 1200px;
    width: 100%;
    text-align: center;
    z-index: 1;
}

.hero-title {
    font-size: clamp(48px, 8vw, 96px);
    font-weight: 600;
    line-height: 1.05;
    letter-spacing: -0.015em;
    margin-bottom: var(--spacing-md);
    animation: fadeInUp 0.8s ease-out;
}

.hero-subtitle {
    font-size: clamp(19px, 2.5vw, 28px);
    font-weight: 400;
    line-height: 1.42859;
    letter-spacing: 0.011em;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-xl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    animation: fadeInUp 0.8s ease-out 0.2s both;
    text-shadow: 0 1px 2px rgba(255, 255, 255, 0.8);
}

.hero-actions {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    animation: fadeInUp 0.8s ease-out 0.4s both;
}

.hero-visual {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.hero-gradient {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(255, 107, 107, 0.15) 0%, rgba(78, 205, 196, 0.1) 50%, transparent 70%);
    border-radius: 50%;
}

.gradient-animate {
    animation: gradientPulse 8s ease-in-out infinite;
}

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

/* 粒子动画 */
.hero-particles {
    position: absolute;
    inset: 0;
    overflow: hidden;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--color-accent);
    opacity: 0.6;
}

.particle-1 {
    top: 20%;
    left: 20%;
    background: #FF6B6B;
    animation: float 6s ease-in-out infinite;
}

.particle-2 {
    top: 60%;
    right: 20%;
    background: #4ECDC4;
    animation: float 8s ease-in-out infinite 1s;
}

.particle-3 {
    bottom: 30%;
    left: 30%;
    background: #45B7D1;
    animation: float 7s ease-in-out infinite 2s;
}

.particle-4 {
    top: 40%;
    right: 40%;
    background: #FF6B6B;
    animation: float 9s ease-in-out infinite 0.5s;
}

@keyframes float {
    0%, 100% {
        transform: translate(0, 0) scale(1);
        opacity: 0.6;
    }
    25% {
        transform: translate(30px, -30px) scale(1.2);
        opacity: 0.8;
    }
    50% {
        transform: translate(-20px, -50px) scale(0.8);
        opacity: 1;
    }
    75% {
        transform: translate(-30px, 20px) scale(1.1);
        opacity: 0.7;
    }
}

/* Hero 动画类 */
.animate-title {
    animation: fadeInUp 0.8s ease-out;
}

.animate-subtitle {
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.animate-actions {
    animation: fadeInUp 0.8s ease-out 0.4s both;
}

/* 按钮 */
.btn {
    display: inline-block;
    padding: 12px 22px;
    font-size: 17px;
    font-weight: 400;
    text-decoration: none;
    border-radius: 980px;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    font-family: inherit;
}

.btn-primary {
    background: linear-gradient(135deg, #FF6B6B 0%, #FF8E8E 100%);
    color: #ffffff;
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s;
}

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

.btn-primary:hover {
    background: linear-gradient(135deg, #FF5252 0%, #FF6B6B 100%);
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 12px 40px rgba(255, 107, 107, 0.4);
}

.btn-primary:active {
    transform: translateY(0) scale(0.98);
}

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

.btn-secondary:hover {
    background-color: rgba(255, 107, 107, 0.1);
    border-color: var(--color-accent-hover);
    color: var(--color-accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(255, 107, 107, 0.2);
}

.btn-secondary:active {
    transform: translateY(0);
}

/* 通用容器 */
.section-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.section-title {
    font-size: clamp(40px, 5vw, 64px);
    font-weight: 600;
    line-height: 1.07143;
    letter-spacing: -0.005em;
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

/* Features 区域 */
.features {
    padding: var(--spacing-3xl) 0;
    background-color: var(--color-bg-secondary);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
}

.feature-card {
    text-align: center;
    padding: var(--spacing-xl);
}

.feature-icon {
    font-size: 48px;
    margin-bottom: var(--spacing-md);
}

.feature-title {
    font-size: 24px;
    font-weight: 600;
    line-height: 1.16667;
    letter-spacing: 0.009em;
    margin-bottom: var(--spacing-sm);
}

.feature-desc {
    font-size: 17px;
    line-height: 1.47059;
    color: var(--color-text-secondary);
}

/* Products Preview */
.products-preview {
    padding: var(--spacing-3xl) 0;
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-xl);
}

.product-card {
    border-radius: var(--radius);
    overflow: hidden;
    transition: var(--transition);
}

.product-card:hover {
    transform: translateY(-8px);
}

.product-image {
    width: 100%;
    height: 300px;
    background-color: var(--color-bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
}

.product-placeholder {
    width: 80%;
    height: 80%;
    background: linear-gradient(135deg, rgba(0, 113, 227, 0.1) 0%, rgba(0, 212, 255, 0.1) 100%);
    border-radius: var(--radius);
}

.product-title {
    font-size: 28px;
    font-weight: 600;
    line-height: 1.14286;
    letter-spacing: 0.007em;
    margin: var(--spacing-md) 0 var(--spacing-sm);
    padding: 0 var(--spacing-md);
}

.product-desc {
    font-size: 17px;
    line-height: 1.47059;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    padding: 0 var(--spacing-md);
}

.product-link {
    display: inline-block;
    color: var(--color-accent);
    text-decoration: none;
    font-size: 17px;
    padding: 0 var(--spacing-md) var(--spacing-md);
    transition: var(--transition);
}

.product-link:hover {
    color: var(--color-accent-hover);
}

/* Page Hero */
.page-hero {
    padding: var(--spacing-3xl) 0 var(--spacing-2xl);
    text-align: center;
}

.page-title {
    font-size: clamp(48px, 6vw, 80px);
    font-weight: 600;
    line-height: 1.05;
    letter-spacing: -0.015em;
    margin-bottom: var(--spacing-sm);
}

.page-subtitle {
    font-size: clamp(19px, 2.5vw, 28px);
    font-weight: 400;
    color: var(--color-text-secondary);
}

/* Product Detail */
.product-detail {
    padding: var(--spacing-3xl) 0;
}

.product-detail:nth-child(even) {
    background-color: var(--color-bg-secondary);
}

.product-detail-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.product-detail-content.reverse {
    direction: rtl;
}

.product-detail-content.reverse > * {
    direction: ltr;
}

.product-detail-title {
    font-size: clamp(40px, 5vw, 56px);
    font-weight: 600;
    line-height: 1.07143;
    letter-spacing: -0.005em;
    margin-bottom: var(--spacing-md);
}

.product-detail-desc {
    font-size: 19px;
    line-height: 1.42105;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

.product-features {
    list-style: none;
}

.product-features li {
    font-size: 17px;
    line-height: 1.47059;
    padding: var(--spacing-sm) 0;
    padding-left: var(--spacing-lg);
    position: relative;
}

.product-features li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-size: 24px;
    line-height: 1;
}

.product-detail-visual,
.service-detail-visual {
    width: 100%;
    height: 500px;
    background-color: var(--color-bg-secondary);
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.product-visual-placeholder {
    width: 80%;
    height: 80%;
    background: linear-gradient(135deg, rgba(255, 107, 107, 0.15) 0%, rgba(78, 205, 196, 0.15) 100%);
    border-radius: var(--radius);
}

/* Service Process */
.service-process {
    padding: var(--spacing-3xl) 0;
    background-color: var(--color-bg-secondary);
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-xl);
}

.process-step {
    text-align: center;
}

.step-number {
    font-size: 48px;
    font-weight: 600;
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
}

.step-title {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.step-desc {
    font-size: 17px;
    color: var(--color-text-secondary);
}

/* About */
.about-intro {
    padding: var(--spacing-3xl) 0;
}

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

.about-title {
    font-size: clamp(40px, 5vw, 56px);
    font-weight: 600;
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.about-text {
    font-size: 19px;
    line-height: 1.42105;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
}

/* Values */
.values {
    padding: var(--spacing-3xl) 0;
    background-color: var(--color-bg-secondary);
}

.values-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-xl);
}

.value-card {
    text-align: center;
    padding: var(--spacing-xl);
}

.value-title {
    font-size: 32px;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-accent);
}

.value-desc {
    font-size: 17px;
    line-height: 1.47059;
    color: var(--color-text-secondary);
}

/* Team */
.team {
    padding: var(--spacing-3xl) 0;
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-xl);
}

.team-member {
    text-align: center;
}

.member-avatar {
    width: 200px;
    height: 200px;
    margin: 0 auto var(--spacing-md);
    border-radius: 50%;
    background-color: var(--color-bg-secondary);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.avatar-placeholder {
    width: 80%;
    height: 80%;
    border-radius: 50%;
    background: linear-gradient(135deg, rgba(0, 113, 227, 0.2) 0%, rgba(0, 212, 255, 0.2) 100%);
}

.member-name {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.member-role {
    font-size: 17px;
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
}

.member-desc {
    font-size: 17px;
    color: var(--color-text-secondary);
}

/* Contact */
.contact {
    padding: var(--spacing-3xl) 0;
    background-color: var(--color-bg-secondary);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    max-width: 1000px;
    margin: 0 auto;
}

.contact-item {
    margin-bottom: var(--spacing-xl);
}

.contact-label {
    font-size: 17px;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
}

.contact-value {
    font-size: 19px;
    color: var(--color-text-secondary);
}

.contact-value a {
    color: var(--color-accent);
    text-decoration: none;
}

.contact-value a:hover {
    text-decoration: underline;
}

.contact-form-wrapper {
    background-color: var(--color-bg);
    padding: var(--spacing-xl);
    border-radius: var(--radius);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.form-group label {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-secondary);
}

.form-group input,
.form-group textarea {
    padding: 12px;
    border: 1px solid var(--color-border);
    border-radius: 8px;
    font-size: 17px;
    font-family: inherit;
    transition: var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(0, 113, 227, 0.1);
}

/* Footer */
.global-footer {
    background-color: var(--color-bg-secondary);
    padding: var(--spacing-3xl) 0 var(--spacing-lg);
    border-top: 1px solid var(--color-border);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    margin-bottom: var(--spacing-xl);
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-logo {
    width: 40px;
    height: 40px;
    margin-bottom: var(--spacing-xs);
}

.footer-company {
    font-size: 14px;
    color: var(--color-text-secondary);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
}

.footer-column h4 {
    font-size: 12px;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.footer-column a {
    display: block;
    font-size: 12px;
    color: var(--color-text-secondary);
    text-decoration: none;
    margin-bottom: var(--spacing-xs);
    transition: var(--transition);
}

.footer-column a {
    position: relative;
    padding-left: 0;
    transition: var(--transition-fast);
}

.footer-column a::before {
    content: '→';
    position: absolute;
    left: -16px;
    opacity: 0;
    transition: var(--transition-fast);
}

.footer-column a:hover {
    color: var(--color-accent);
    padding-left: 16px;
}

.footer-column a:hover::before {
    opacity: 1;
    left: 0;
}

.footer-bottom {
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--color-border);
    text-align: center;
}

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

.footer-contact {
    margin-top: var(--spacing-sm);
}

.footer-contact a {
    color: var(--color-accent);
    text-decoration: none;
}

.footer-contact a:hover {
    text-decoration: underline;
}

/* 新增样式 - 服务展示 */
.section-label {
    display: inline-block;
    font-size: 14px;
    font-weight: 600;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-sm);
    position: relative;
    padding-left: 20px;
}

.section-label::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 12px;
    height: 2px;
    background: linear-gradient(90deg, var(--color-accent), var(--color-accent-2));
    border-radius: 2px;
}

.services-showcase {
    padding: var(--spacing-3xl) 0;
}

.services-intro {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-desc {
    font-size: 19px;
    line-height: 1.42105;
    color: var(--color-text-secondary);
    max-width: 700px;
    margin: var(--spacing-md) auto 0;
}

.services-grid {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3xl);
}

.service-item {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
    opacity: 0;
    transform: translateY(50px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.service-item.in-view {
    opacity: 1;
    transform: translateY(0);
}

.service-item-2 {
    direction: rtl;
}

.service-item-2 > * {
    direction: ltr;
}

.service-image {
    width: 100%;
    height: 400px;
    border-radius: var(--radius);
    overflow: hidden;
}

.service-img-placeholder {
    width: 100%;
    height: 100%;
    border-radius: var(--radius);
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.service-item:hover .service-img-placeholder {
    transform: scale(1.08);
    filter: brightness(1.05);
}

.service-item {
    transition: var(--transition);
}

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

.service-content {
    padding: var(--spacing-lg);
}

.service-title {
    font-size: clamp(32px, 4vw, 48px);
    font-weight: 600;
    line-height: 1.1;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, #FF6B6B 0%, #4ECDC4 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transition: var(--transition);
}

.service-item:hover .service-title {
    transform: translateX(4px);
}

.service-desc {
    font-size: 19px;
    line-height: 1.42105;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

.service-features {
    list-style: none;
}

.service-features li {
    font-size: 17px;
    line-height: 1.8;
    padding: var(--spacing-xs) 0;
    padding-left: var(--spacing-lg);
    position: relative;
    color: var(--color-text-secondary);
}

.service-features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-accent-2);
    font-weight: 600;
    transition: var(--transition-fast);
}

.service-features li:hover::before {
    transform: scale(1.2);
    color: var(--color-accent);
}

/* 案例展示 */
.cases-showcase {
    padding: var(--spacing-3xl) 0;
    background-color: var(--color-bg-secondary);
}

.cases-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
}

.case-card {
    background: var(--color-bg);
    border-radius: var(--radius);
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    opacity: 0;
    transform: translateY(30px);
}

.case-card.in-view {
    opacity: 1;
    transform: translateY(0);
}

.case-card:hover {
    transform: translateY(-12px);
    box-shadow: 0 24px 80px rgba(0, 0, 0, 0.15);
}

.case-card {
    transition: var(--transition);
}

.case-card:hover .case-tag {
    transform: scale(1.05);
    background: rgba(255, 255, 255, 0.95);
}

.case-image {
    position: relative;
    width: 100%;
    height: 300px;
    overflow: hidden;
    border-radius: var(--radius) var(--radius) 0 0;
}

.case-img-placeholder {
    width: 100%;
    height: 100%;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: var(--radius) var(--radius) 0 0;
    overflow: hidden;
}

.case-card:hover .case-img-placeholder {
    transform: scale(1.08);
}

.case-overlay {
    position: absolute;
    top: var(--spacing-md);
    right: var(--spacing-md);
}

.case-tag {
    display: inline-block;
    padding: 6px 12px;
    background: rgba(255, 255, 255, 0.9);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    color: var(--color-text);
    transition: var(--transition-fast);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.case-info {
    padding: var(--spacing-lg);
}

.case-title {
    font-size: 24px;
    font-weight: 600;
    margin-bottom: var(--spacing-sm);
    transition: var(--transition-fast);
}

.case-card:hover .case-title {
    color: var(--color-accent);
    transform: translateX(4px);
}

.case-desc {
    font-size: 17px;
    line-height: 1.6;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

.case-stats {
    display: flex;
    gap: var(--spacing-lg);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 28px;
    font-weight: 600;
    background: linear-gradient(135deg, #FF6B6B 0%, #4ECDC4 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transition: var(--transition);
    display: inline-block;
}

.case-card:hover .stat-number {
    transform: scale(1.1);
}

.stat-label {
    font-size: 14px;
    color: var(--color-text-secondary);
    margin-top: 4px;
}

/* 为什么选择我们 */
.why-us {
    padding: var(--spacing-3xl) 0;
}

.why-us-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.why-us-text {
    opacity: 0;
    transform: translateX(-30px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.why-us-text.in-view {
    opacity: 1;
    transform: translateX(0);
}

.why-us-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.why-item {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
    padding: var(--spacing-md);
    border-radius: var(--radius);
    transition: var(--transition);
}

.why-item:hover {
    background: rgba(255, 107, 107, 0.03);
    transform: translateX(8px);
}

.why-item:hover .why-icon {
    transform: scale(1.15) rotate(5deg);
}

.why-icon {
    font-size: 32px;
    flex-shrink: 0;
    transition: var(--transition);
}

.why-content h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.why-content p {
    font-size: 17px;
    line-height: 1.6;
    color: var(--color-text-secondary);
}

.why-us-visual {
    width: 100%;
    height: 500px;
    border-radius: var(--radius);
    overflow: hidden;
    opacity: 0;
    transform: translateX(30px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.why-us-visual.in-view {
    opacity: 1;
    transform: translateX(0);
}

.why-visual-placeholder {
    width: 100%;
    height: 100%;
    border-radius: var(--radius);
    animation: gradientShift 10s ease infinite;
}

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

/* 服务详情页新增样式 */
.service-detail {
    padding: var(--spacing-3xl) 0;
}

.service-detail:nth-child(even) {
    background-color: var(--color-bg-secondary);
}

.service-detail-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
    opacity: 0;
    transform: translateY(50px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.service-detail-content.in-view {
    opacity: 1;
    transform: translateY(0);
}

.service-category {
    display: inline-block;
    font-size: 14px;
    font-weight: 600;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-sm);
}

.service-detail-title {
    font-size: clamp(40px, 5vw, 56px);
    font-weight: 600;
    line-height: 1.07143;
    letter-spacing: -0.005em;
    margin-bottom: var(--spacing-md);
}

.service-detail-desc {
    font-size: 19px;
    line-height: 1.42105;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

.service-detail-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

.detail-feature-item h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.detail-feature-item p {
    font-size: 15px;
    line-height: 1.6;
    color: var(--color-text-secondary);
}

.service-visual-placeholder {
    width: 100%;
    height: 100%;
    border-radius: var(--radius);
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
    background-size: cover;
    background-position: center;
}

.service-detail-content:hover .service-visual-placeholder {
    transform: scale(1.05);
}

/* 详细案例 */
.detailed-cases {
    padding: var(--spacing-3xl) 0;
    background-color: var(--color-bg-secondary);
}

.detailed-cases-grid {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-3xl);
}

.detailed-case {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    background: var(--color-bg);
    border-radius: var(--radius);
    overflow: hidden;
    opacity: 0;
    transform: translateY(50px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.detailed-case.in-view {
    opacity: 1;
    transform: translateY(0);
}

.detailed-case:hover {
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.1);
}

.detailed-case-image {
    width: 100%;
    height: 100%;
    min-height: 400px;
    overflow: hidden;
}

.detailed-case-img {
    width: 100%;
    height: 100%;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.detailed-case:hover .detailed-case-img {
    transform: scale(1.1);
}

.detailed-case-content {
    padding: var(--spacing-xl);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.case-category {
    display: inline-block;
    font-size: 12px;
    font-weight: 600;
    color: var(--color-accent);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-sm);
}

.detailed-case-title {
    font-size: 32px;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

.detailed-case-desc {
    font-size: 17px;
    line-height: 1.6;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

.case-metrics {
    display: flex;
    gap: var(--spacing-xl);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--color-border);
}

.metric {
    display: flex;
    flex-direction: column;
}

.metric-value {
    font-size: 32px;
    font-weight: 600;
    background: linear-gradient(135deg, #FF6B6B 0%, #4ECDC4 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.metric-label {
    font-size: 14px;
    color: var(--color-text-secondary);
    margin-top: 4px;
}

/* 关于我们页新增样式 */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.about-visual {
    width: 100%;
    height: 500px;
    border-radius: var(--radius);
    overflow: hidden;
}

.about-visual-placeholder {
    width: 100%;
    height: 100%;
    border-radius: var(--radius);
    animation: gradientShift 10s ease infinite;
    background-size: 200% 200%;
}

.about-text-content {
    opacity: 0;
    transform: translateX(30px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.about-text-content.in-view {
    opacity: 1;
    transform: translateX(0);
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-xl);
    border-top: 1px solid var(--color-border);
}

.about-stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-size: 40px;
    font-weight: 600;
    background: linear-gradient(135deg, #FF6B6B 0%, #4ECDC4 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    font-size: 14px;
    color: var(--color-text-secondary);
}

.values-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.value-icon-wrapper {
    margin-bottom: var(--spacing-md);
}

.value-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 40px;
    margin: 0 auto;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.value-card {
    transition: var(--transition);
}

.value-card:hover {
    transform: translateY(-8px);
}

.value-card:hover .value-icon {
    transform: scale(1.15) rotate(8deg);
    box-shadow: var(--shadow-lg);
}

.team-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.timeline {
    padding: var(--spacing-3xl) 0;
    background-color: var(--color-bg-secondary);
}

.timeline-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.timeline-content {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
    padding-left: var(--spacing-xl);
}

.timeline-content::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, #FF6B6B 0%, #4ECDC4 50%, #45B7D1 100%);
}

.timeline-item {
    position: relative;
    margin-bottom: var(--spacing-3xl);
    opacity: 0;
    transform: translateX(-30px);
    transition: all 0.8s cubic-bezier(0.4, 0, 0.2, 1);
}

.timeline-item.in-view {
    opacity: 1;
    transform: translateX(0);
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -29px;
    top: 0;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--color-accent);
    border: 3px solid var(--color-bg);
}

.timeline-year {
    font-size: 24px;
    font-weight: 600;
    color: var(--color-accent);
    margin-bottom: var(--spacing-sm);
}

.timeline-content-text h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

.timeline-content-text p {
    font-size: 17px;
    line-height: 1.6;
    color: var(--color-text-secondary);
}

.contact-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

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

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

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

@keyframes shimmer {
    0% {
        background-position: -1000px 0;
    }
    100% {
        background-position: 1000px 0;
    }
}

/* 返回顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 48px;
    height: 48px;
    background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-2) 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 999;
    box-shadow: var(--shadow-lg);
    border: none;
    color: white;
    font-size: 20px;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-4px) scale(1.1);
    box-shadow: var(--shadow-xl);
}

.back-to-top:active {
    transform: translateY(-2px) scale(1.05);
}

/* 加载动画优化 */
@keyframes skeleton {
    0% {
        background-position: -200px 0;
    }
    100% {
        background-position: calc(200px + 100%) 0;
    }
}

.loading-skeleton {
    background: linear-gradient(
        90deg,
        var(--color-bg-secondary) 0px,
        rgba(255, 255, 255, 0.5) 40px,
        var(--color-bg-secondary) 80px
    );
    background-size: 200px 100%;
    animation: skeleton 1.5s ease-in-out infinite;
}

/* 图片懒加载优化 */
img[loading="lazy"] {
    opacity: 0;
    transition: opacity 0.3s;
}

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

/* 响应式设计 */
@media (max-width: 768px) {
    .nav-links {
        gap: var(--spacing-md);
    }
    
    .nav-links a {
        font-size: 11px;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .service-item,
    .service-detail-content,
    .product-detail-content {
        grid-template-columns: 1fr;
    }
    
    .service-item-2,
    .service-detail-content.reverse,
    .product-detail-content.reverse {
        direction: ltr;
    }
    
    .why-us-content,
    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .detailed-case {
        grid-template-columns: 1fr;
    }
    
    .service-detail-features {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        grid-template-columns: 1fr;
    }
    
    .cases-grid {
        grid-template-columns: 1fr;
    }
    
    .back-to-top {
        bottom: 1.5rem;
        right: 1.5rem;
        width: 44px;
        height: 44px;
    }
    
    .hero-title {
        font-size: clamp(36px, 8vw, 64px);
    }
    
    .section-title {
        font-size: clamp(32px, 6vw, 48px);
    }
}

@media (max-width: 480px) {
    .nav-container {
        padding: 0 var(--spacing-md);
    }
    
    .hero {
        min-height: 80vh;
        padding: var(--spacing-2xl) var(--spacing-md);
    }
    
    .section-container {
        padding: 0 var(--spacing-md);
    }
    
    .service-content,
    .case-info {
        padding: var(--spacing-md);
    }
    
    .back-to-top {
        bottom: 1rem;
        right: 1rem;
        width: 40px;
        height: 40px;
        font-size: 18px;
    }
}

/* 性能优化 - 减少重绘 */
.will-change-transform {
    will-change: transform;
}

.will-change-opacity {
    will-change: opacity;
}

/* 可访问性改进 */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* 打印样式 */
@media print {
    .global-nav,
    .back-to-top,
    .hero-particles,
    .hero-gradient {
        display: none;
    }
    
    body {
        color: #000;
        background: #fff;
    }
}