/* ========================================
   上海昊象信息科技有限公司官网样式 - 2026现代化优化版
   设计理念：科技感 + 专业稳重
   ======================================== */

/* CSS Variables - 2026现代设计规范 - 金黄色企业配色 */
:root {
    /* 主色调系统 - 金黄色系（基于企业Logo） */
    --primary-color: #F5A623;
    --primary-dark: #E09500;
    --primary-light: #FFB84D;
    --primary-lighter: #FFD280;
    --accent-color: #FFA726;
    --accent-gradient: linear-gradient(135deg, #F5A623 0%, #FFA726 100%);

    /* 中性色系统 - 黑色/深灰色系 */
    --secondary-color: #fafafa;
    --secondary-dark: #f5f5f5;
    --text-color: #1A1A1A;
    --text-light: #2D2D2D;
    --text-muted: #4A4A4A;
    --white: #ffffff;

    /* 边框和分割线 */
    --border-color: #E0E0E0;
    --border-light: #F0F0F0;

    /* 阴影系统 - 金色光晕阴影 */
    --shadow-xs: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.06), 0 1px 2px rgba(0, 0, 0, 0.03);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.08), 0 2px 4px rgba(0, 0, 0, 0.04);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.1), 0 4px 8px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 16px 32px rgba(0, 0, 0, 0.12), 0 8px 16px rgba(0, 0, 0, 0.06);
    --shadow-2xl: 0 24px 48px rgba(0, 0, 0, 0.15), 0 12px 24px rgba(0, 0, 0, 0.08);

    /* 玻璃态效果 */
    --glass-bg: rgba(255, 255, 255, 0.85);
    --glass-border: rgba(245, 166, 35, 0.15);
    --glass-shadow: 0 8px 32px rgba(0, 0, 0, 0.08);

    /* 过渡动画 */
    --transition-fast: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.5s cubic-bezier(0.4, 0, 0.2, 1);

    /* 间距系统 - 8px基准 */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;

    /* 容器宽度 */
    --max-width: 1280px;
    --max-width-narrow: 960px;

    /* 圆角系统 */
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-full: 9999px;
}

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Microsoft YaHei', '微软雅黑', Arial, sans-serif;
    line-height: 1.7;
    color: var(--text-color);
    background-color: var(--white);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-base);
}

ul {
    list-style: none;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* Container */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ========================================
   Header & Navigation - 玻璃态导航栏
   ======================================== */
header {
    background: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    box-shadow: var(--shadow-sm);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: var(--transition-base);
    border-bottom: 1px solid var(--glass-border);
}

header.scrolled {
    box-shadow: var(--shadow-md);
    background: rgba(255, 255, 255, 0.95);
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo img {
    height: 48px;
}

.logo-text {
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
}

.nav-links {
    display: flex;
    gap: var(--spacing-xl);
}

.nav-links a {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--text-color);
    position: relative;
    padding: 8px 0;
    letter-spacing: 0.01em;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--accent-gradient);
    transition: var(--transition-base);
}

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

.nav-links a:hover,
.nav-links a.active {
    color: var(--primary-color);
}

/* Mobile Menu Button */
.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 6px;
    cursor: pointer;
    padding: 10px;
}

.mobile-menu-btn span {
    width: 24px;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition-base);
}

/* ========================================
   Hero Section - 动态背景 - 金黄色主题
   ======================================== */
.hero {
    background: linear-gradient(135deg, #FFF8E1 0%, #FFECB3 50%, #FFE082 100%);
    color: #1A1A1A;
    padding: 160px 0 120px;
    position: relative;
    overflow: hidden;
}

/* ========================================
   Page Header - 统一页面头部样式
   ======================================== */
.page-header {
    background: linear-gradient(135deg, #FFF8E1 0%, #FFECB3 50%, #FFE082 100%);
    padding: 150px 0 80px;
    color: #1A1A1A;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.page-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.12) 0%, transparent 40%);
    animation: pulse 8s ease-in-out infinite;
}

.page-header::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><rect fill="none" stroke="rgba(245,166,35,0.08)" stroke-width="0.5" width="100" height="100"/></svg>');
    background-size: 50px 50px;
    opacity: 0.6;
}

.page-header h1 {
    font-size: 2.625rem;
    font-weight: 800;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
    color: #1A1A1A;
    position: relative;
    z-index: 1;
}

.page-header p {
    font-size: 1.125rem;
    opacity: 0.9;
    color: #2D2D2D;
    position: relative;
    z-index: 1;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.12) 0%, transparent 40%);
    animation: pulse 8s ease-in-out infinite;
}

.hero::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><rect fill="none" stroke="rgba(245,166,35,0.08)" stroke-width="0.5" width="100" height="100"/></svg>');
    background-size: 50px 50px;
    opacity: 0.6;
}

@keyframes pulse {
    0%, 100% { opacity: 0.6; }
    50% { opacity: 0.8; }
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
}

.hero h1 {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.03em;
    line-height: 1.2;
    animation: fadeInUp 0.8s ease;
    color: #1A1A1A;
}

.hero .subtitle {
    font-size: 1.5rem;
    font-weight: 500;
    margin-bottom: var(--spacing-lg);
    opacity: 0.95;
    animation: fadeInUp 0.8s ease 0.1s both;
    letter-spacing: -0.01em;
    color: #F5A623;
}

.hero .description {
    font-size: 1.125rem;
    max-width: 800px;
    margin: 0 auto var(--spacing-xl);
    line-height: 1.9;
    opacity: 0.9;
    animation: fadeInUp 0.8s ease 0.2s both;
    color: #2D2D2D;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    animation: fadeInUp 0.8s ease 0.3s both;
}

.btn {
    padding: 16px 40px;
    border-radius: var(--radius-lg);
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    transition: var(--transition-base);
    border: none;
    letter-spacing: 0.02em;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.3);
    transform: translate(-50%, -50%);
    transition: width 0.6s, height 0.6s;
}

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

.btn-primary {
    background: var(--primary-color);
    color: var(--white);
    box-shadow: var(--shadow-lg);
    border: 2px solid var(--primary-color);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
    background: var(--primary-dark);
    border-color: var(--primary-dark);
}

.btn-secondary {
    background: transparent;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
    box-shadow: var(--shadow-md);
}

.btn-secondary:hover {
    background: var(--primary-color);
    color: var(--white);
    border-color: var(--primary-color);
    transform: translateY(-3px);
    box-shadow: var(--shadow-xl);
}

/* ========================================
   Section Styles
   ======================================== */
section {
    padding: var(--spacing-3xl) 0;
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-2xl);
}

.section-title h2 {
    font-size: 2.75rem;
    font-weight: 800;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.02em;
}

.section-title p {
    font-size: 1.0625rem;
    color: var(--text-light);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.8;
}

/* ========================================
   About Section - 浅色明亮
   ======================================== */
.about-section {
    background: linear-gradient(135deg, #ffffff 0%, #fafbfc 100%);
}

.about-content {
    max-width: 900px;
    margin: 0 auto;
}

.about-text h3 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.01em;
    text-align: center;
}

.about-text p {
    font-size: 1.0625rem;
    line-height: 1.9;
    color: var(--text-light);
    margin-bottom: var(--spacing-md);
    text-align: center;
}

.about-image {
    position: relative;
}

.about-image img {
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    transition: var(--transition-slow);
}

.about-image img:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-xl);
}

.image-placeholder {
    width: 100%;
    height: 400px;
    background: linear-gradient(135deg, #FFF8E1 0%, #FFECB3 100%);
    border-radius: var(--radius-xl);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    border: 2px dashed #FFD54F;
    transition: var(--transition-base);
}

.image-placeholder:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-color);
}

.placeholder-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
    opacity: 0.8;
}

.image-placeholder p {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-color);
    margin-bottom: var(--spacing-xs);
}

.image-placeholder span {
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* ========================================
   Services Section - 浅色明亮
   ======================================== */
.services-section {
    background: linear-gradient(135deg, #ffffff 0%, #fafbfc 100%);
}

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

.service-card {
    background: var(--white);
    padding: var(--spacing-xl) var(--spacing-lg);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
    text-align: center;
    border: 1px solid var(--border-light);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--accent-gradient);
    opacity: 0;
    transition: var(--transition-base);
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

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

.service-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-md);
    background: linear-gradient(135deg, #FFF8E1 0%, #FFECB3 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #F5A623;
    font-size: 2.25rem;
    transition: var(--transition-base);
    border: 2px solid #FFD54F;
}

.service-card:hover .service-icon {
    background: linear-gradient(135deg, #FFECB3 0%, #FFD54F 100%);
    color: #E09500;
    transform: rotate(10deg) scale(1.1);
    border-color: #FFA726;
}

.service-card h3 {
    font-size: 1.375rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.01em;
}

.service-card p {
    font-size: 0.9375rem;
    color: var(--text-light);
    line-height: 1.7;
}

/* ========================================
   Advantages Section - 金黄色主题
   ======================================== */
.advantages-section {
    background: linear-gradient(135deg, #FFF8E1 0%, #FFECB3 50%, #FFE082 100%);
    color: var(--text-color);
    position: relative;
    overflow: hidden;
}

.advantages-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 70%, rgba(255, 255, 255, 0.4) 0%, transparent 50%);
}

.advantages-section .section-title h2 {
    color: var(--primary-color);
    -webkit-text-fill-color: var(--primary-color);
}

.advantages-section .section-title p {
    color: var(--text-light);
}

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

.advantage-item {
    text-align: center;
    padding: var(--spacing-xl);
    background: var(--white);
    border-radius: var(--radius-xl);
    transition: var(--transition-base);
    border: 1px solid var(--border-light);
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

.advantage-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--accent-gradient);
    opacity: 0;
    transition: var(--transition-base);
}

.advantage-item:hover {
    transform: translateY(-8px);
    background: var(--white);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

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

.advantage-number {
    font-size: 3.5rem;
    font-weight: 800;
    margin-bottom: var(--spacing-sm);
    letter-spacing: -0.02em;
    color: var(--primary-color);
}

.advantage-label {
    font-size: 1.125rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    letter-spacing: 0.01em;
    color: var(--text-color);
}

.advantage-desc {
    font-size: 0.9375rem;
    color: var(--text-light);
    line-height: 1.7;
}

/* ========================================
   Contact Section - 浅色明亮
   ======================================== */
.contact-section {
    background: linear-gradient(135deg, #ffffff 0%, #fafbfc 100%);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
    max-width: 800px;
    margin: 0 auto;
}

.contact-info h3 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-xl);
    letter-spacing: -0.01em;
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: var(--white);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-sm);
    transition: var(--transition-base);
    border: 1px solid var(--border-light);
    position: relative;
    overflow: hidden;
}

.contact-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--accent-gradient);
    opacity: 0;
    transition: var(--transition-base);
}

.contact-item:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-light);
}

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

.contact-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, #FFF8E1 0%, #FFECB3 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: #F5A623;
    font-size: 1.5rem;
    flex-shrink: 0;
    border: 2px solid #FFD54F;
}

.contact-details h4 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: 6px;
    letter-spacing: -0.005em;
}

.contact-details p {
    font-size: 0.9375rem;
    color: var(--text-light);
    line-height: 1.6;
}

/* ========================================
   Footer - 现代化设计
   ======================================== */
footer {
    background: linear-gradient(135deg, #1A1A1A 0%, #2D2D2D 100%);
    color: var(--white);
    padding: var(--spacing-3xl) 0 0;
    position: relative;
    overflow: hidden;
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--accent-gradient);
}

/* 主要内容区域 */
.footer-main {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1.2fr;
    gap: var(--spacing-3xl);
    padding-bottom: var(--spacing-2xl);
    margin-bottom: var(--spacing-xl);
    border-bottom: 1px solid rgba(245, 166, 35, 0.2);
}

/* 公司品牌区域 */
.footer-brand {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.footer-logo img {
    height: 48px;
    filter: brightness(0) invert(1);
    transition: var(--transition-base);
}

.footer-logo:hover img {
    filter: brightness(1);
}

.footer-logo-text {
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
}

.footer-description {
    font-size: 1rem;
    line-height: 1.8;
    color: rgba(255, 255, 255, 0.8);
    max-width: 320px;
}

/* 快速链接区域 */
.footer-section {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.footer-title {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
    letter-spacing: -0.01em;
    position: relative;
    padding-bottom: var(--spacing-sm);
}

.footer-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 3px;
    background: var(--accent-gradient);
    border-radius: var(--radius-full);
}

/* 快速链接网格 */
.quick-links {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-sm);
}

.quick-link-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
    color: rgba(255, 255, 255, 0.85);
    font-size: 0.9375rem;
    font-weight: 500;
    transition: var(--transition-base);
    border: 1px solid rgba(245, 166, 35, 0.1);
}

.quick-link-item:hover {
    background: rgba(245, 166, 35, 0.15);
    color: var(--primary-light);
    transform: translateX(4px);
    border-color: var(--primary-color);
}

.link-icon {
    font-size: 1.125rem;
    transition: var(--transition-base);
}

.quick-link-item:hover .link-icon {
    transform: scale(1.2);
}

/* 联系方式列表 */
.contact-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.contact-item-footer {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
    transition: var(--transition-base);
    border: 1px solid rgba(245, 166, 35, 0.1);
}

.contact-item-footer:hover {
    background: rgba(245, 166, 35, 0.15);
    border-color: var(--primary-color);
    transform: translateX(4px);
}

.contact-icon-footer {
    font-size: 1.25rem;
    flex-shrink: 0;
    margin-top: 2px;
}

.contact-text {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.contact-label {
    font-size: 0.8125rem;
    color: rgba(255, 255, 255, 0.6);
    font-weight: 500;
}

.contact-value {
    font-size: 0.9375rem;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
    line-height: 1.5;
}

/* 底部版权信息 */
.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-lg) 0;
    gap: var(--spacing-md);
}

.footer-copyright p {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.6;
}

.footer-icp a {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.875rem;
    transition: var(--transition-base);
    border: 1px solid rgba(245, 166, 35, 0.1);
}

.footer-icp a:hover {
    background: rgba(245, 166, 35, 0.15);
    color: var(--primary-light);
    border-color: var(--primary-color);
}

.icp-icon {
    font-size: 1rem;
}

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

.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Scroll Animation Classes */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.animate-on-scroll.animated {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger Animation */
.stagger-1 { transition-delay: 0.1s; }
.stagger-2 { transition-delay: 0.2s; }
.stagger-3 { transition-delay: 0.3s; }
.stagger-4 { transition-delay: 0.4s; }

/* ========================================
   Utility Classes
   ======================================== */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.mt-20 { margin-top: 20px; }
.mt-40 { margin-top: 40px; }
.mb-20 { margin-bottom: 20px; }
.mb-40 { margin-bottom: 40px; }

.hidden { display: none; }
.visible { display: block; }