/**
 * 河北奥游科技有限公司官网样式
 * 科技风格设计
 */

/* ==================== CSS变量 ==================== */
:root {
    /* 颜色系统 */
    --color-bg-primary: #0A0E27;
    --color-bg-secondary: #12172E;
    --color-bg-tertiary: #1A1F3A;

    --color-primary: #00D9FF;
    --color-secondary: #7B2FFF;
    --color-accent: #FF2E63;
    --color-success: #00FFB3;

    --color-text-primary: #FFFFFF;
    --color-text-secondary: #A0AEC0;
    --color-text-muted: #718096;

    /* 渐变 */
    --gradient-primary: linear-gradient(135deg, #00D9FF 0%, #7B2FFF 100%);
    --gradient-secondary: linear-gradient(135deg, #7B2FFF 0%, #FF00FF 100%);
    --gradient-accent: linear-gradient(135deg, #FF2E63 0%, #FF6B00 100%);

    /* 间距 */
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    --space-3xl: 6rem;

    /* 字体大小 */
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;
    --font-size-4xl: 2.5rem;
    --font-size-5xl: 3rem;

    /* 阴影 */
    --shadow-sm: 0 2px 8px rgba(0, 217, 255, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 217, 255, 0.2);
    --shadow-lg: 0 8px 32px rgba(0, 217, 255, 0.3);
    --shadow-glow: 0 0 20px rgba(0, 217, 255, 0.5);

    /* 圆角 */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;

    /* 过渡 */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", "PingFang SC", "Hiragino Sans GB", sans-serif;
    background-color: var(--color-bg-primary);
    color: var(--color-text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ==================== 粒子背景 ==================== */
#particles-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    background: radial-gradient(ellipse at bottom, #1B2735 0%, #090A0F 100%);
    overflow: hidden;
}

#particles-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        radial-gradient(2px 2px at 20% 30%, rgba(0, 217, 255, 0.3), transparent),
        radial-gradient(2px 2px at 60% 70%, rgba(123, 47, 255, 0.3), transparent),
        radial-gradient(1px 1px at 50% 50%, rgba(255, 46, 99, 0.3), transparent),
        radial-gradient(1px 1px at 80% 10%, rgba(0, 255, 179, 0.3), transparent);
    background-size: 200% 200%, 180% 180%, 220% 220%, 190% 190%;
    animation: particleMove 20s ease infinite;
}

@keyframes particleMove {
    0%, 100% { background-position: 0% 0%, 100% 100%, 50% 50%, 80% 20%; }
    25% { background-position: 100% 0%, 0% 100%, 30% 70%, 20% 80%; }
    50% { background-position: 100% 100%, 0% 0%, 70% 30%, 60% 40%; }
    75% { background-position: 0% 100%, 100% 0%, 40% 60%, 90% 10%; }
}

/* ==================== 容器 ==================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* ==================== 导航栏 ==================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(10, 14, 39, 0.8);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-bottom: 1px solid rgba(0, 217, 255, 0.1);
    transition: all var(--transition-base);
}

.header.scrolled {
    background: rgba(10, 14, 39, 0.95);
    box-shadow: var(--shadow-md);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: var(--font-size-xl);
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.logo-icon {
    font-size: var(--font-size-2xl);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--space-xl);
}

.nav-link {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: var(--font-size-base);
    font-weight: 500;
    transition: all var(--transition-fast);
    position: relative;
    padding: var(--space-xs) 0;
}

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

.nav-link:hover {
    color: var(--color-primary);
}

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

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--space-xs);
}

.mobile-menu-toggle span {
    width: 25px;
    height: 2px;
    background: var(--color-primary);
    transition: all var(--transition-base);
}

/* ==================== Hero区 ==================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: var(--space-3xl) var(--space-lg);
    position: relative;
    overflow: hidden;
}

.hero-content {
    max-width: 600px;
    z-index: 1;
    animation: fadeInUp 1s ease;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-xs) var(--space-md);
    background: rgba(0, 217, 255, 0.1);
    border: 1px solid rgba(0, 217, 255, 0.3);
    border-radius: var(--radius-xl);
    color: var(--color-primary);
    font-size: var(--font-size-sm);
    margin-bottom: var(--space-md);
}

.badge-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--color-primary);
    animation: pulse 2s ease infinite;
}

.hero-title {
    font-size: var(--font-size-5xl);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: var(--space-lg);
}

.text-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xl);
    line-height: 1.8;
}

.hero-stats {
    display: flex;
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
}

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

.stat-number {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    margin-top: var(--space-xs);
}

.hero-cta {
    display: flex;
    gap: var(--space-md);
}

/* ==================== Hero视觉元素 ==================== */
.hero-visual {
    position: absolute;
    right: 10%;
    top: 50%;
    transform: translateY(-50%);
    width: 400px;
    height: 400px;
}

.floating-card {
    position: absolute;
    padding: var(--space-lg);
    background: rgba(18, 23, 46, 0.6);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(0, 217, 255, 0.2);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    animation: float 3s ease-in-out infinite;
}

.card-1 {
    top: 0;
    left: 0;
    animation-delay: 0s;
}

.card-2 {
    top: 50%;
    right: 0;
    animation-delay: 1s;
}

.card-3 {
    bottom: 0;
    left: 50%;
    animation-delay: 2s;
}

.card-icon {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--space-sm);
}

.card-text {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

/* ==================== 按钮样式 ==================== */
.btn-primary,
.btn-outline,
.btn-text {
    padding: var(--space-md) var(--space-xl);
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--color-text-primary);
}

.btn-primary.glow-effect {
    box-shadow: 0 0 20px rgba(0, 217, 255, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 30px rgba(0, 217, 255, 0.5);
}

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

.btn-outline:hover {
    background: var(--color-primary);
    color: var(--color-bg-primary);
}

.btn-text {
    background: transparent;
    color: var(--color-primary);
    padding: var(--space-xs) 0;
}

.btn-text:hover {
    gap: var(--space-md);
}

/* ==================== Section通用样式 ==================== */
section {
    padding: var(--space-3xl) 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-3xl);
    animation: fadeInUp 0.8s ease;
}

.section-tag {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    background: rgba(0, 217, 255, 0.1);
    border: 1px solid rgba(0, 217, 255, 0.3);
    border-radius: var(--radius-xl);
    color: var(--color-primary);
    font-size: var(--font-size-sm);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: var(--space-md);
}

.section-title {
    font-size: var(--font-size-4xl);
    font-weight: 800;
    margin-bottom: var(--space-md);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-description {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
}

/* ==================== 关于我们 ==================== */
.about {
    background: linear-gradient(180deg, var(--color-bg-primary) 0%, var(--color-bg-secondary) 100%);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--space-3xl);
    align-items: start;
}

.about-left {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

.about-image {
    display: flex;
    justify-content: center;
    padding: var(--space-xl);
    background: rgba(18, 23, 46, 0.4);
    border: 1px solid rgba(0, 217, 255, 0.2);
    border-radius: var(--radius-lg);
    backdrop-filter: blur(10px);
}

.image-placeholder svg {
    animation: rotate 20s linear infinite;
}

.about-features {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
}

.feature-item {
    padding: var(--space-md);
    background: rgba(18, 23, 46, 0.4);
    border: 1px solid rgba(0, 217, 255, 0.2);
    border-radius: var(--radius-md);
    text-align: center;
    transition: all var(--transition-base);
}

.feature-item:hover {
    transform: translateY(-5px);
    border-color: var(--color-primary);
    box-shadow: var(--shadow-glow);
}

.feature-icon {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--space-xs);
}

.feature-text {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.about-right {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
}

.about-text h3 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--space-md);
    color: var(--color-primary);
}

.about-text p {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-md);
    line-height: 1.8;
}

.about-mission {
    display: flex;
    gap: var(--space-md);
    padding: var(--space-lg);
    background: rgba(123, 47, 255, 0.1);
    border-left: 3px solid var(--color-secondary);
    border-radius: var(--radius-md);
    margin-top: var(--space-lg);
}

.mission-icon {
    font-size: var(--font-size-3xl);
}

.mission-content h4 {
    color: var(--color-secondary);
    margin-bottom: var(--space-xs);
}

.mission-content p {
    margin: 0;
    color: var(--color-text-secondary);
}

/* ==================== 时间线 ==================== */
.about-timeline {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.timeline-item {
    display: flex;
    gap: var(--space-lg);
    padding: var(--space-lg);
    background: rgba(18, 23, 46, 0.4);
    border: 1px solid rgba(0, 217, 255, 0.2);
    border-radius: var(--radius-md);
    transition: all var(--transition-base);
}

.timeline-item:hover {
    border-color: var(--color-primary);
    transform: translateX(10px);
}

.timeline-year {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-primary);
    min-width: 80px;
}

.timeline-content h4 {
    color: var(--color-text-primary);
    margin-bottom: var(--space-xs);
}

.timeline-content p {
    color: var(--color-text-secondary);
    margin: 0;
}

/* ==================== 核心业务 ==================== */
.services {
    background: var(--color-bg-secondary);
}

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

.service-card {
    padding: var(--space-xl);
    transition: all var(--transition-base);
    animation: fadeInUp 0.8s ease;
}

.service-card:nth-child(1) { animation-delay: 0.1s; }
.service-card:nth-child(2) { animation-delay: 0.2s; }
.service-card:nth-child(3) { animation-delay: 0.3s; }
.service-card:nth-child(4) { animation-delay: 0.4s; }

.service-card:hover {
    transform: translateY(-10px);
}

.service-icon {
    margin-bottom: var(--space-lg);
}

.service-title {
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-md);
    color: var(--color-text-primary);
}

.service-description {
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: var(--space-lg);
}

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

.service-features li {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-xs);
    padding-left: var(--space-md);
}

/* ==================== 毛玻璃卡片 ==================== */
.glass-card {
    background: rgba(18, 23, 46, 0.4);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(0, 217, 255, 0.2);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.glass-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-glow);
}

/* ==================== 产品展示 ==================== */
.products {
    background: linear-gradient(180deg, var(--color-bg-secondary) 0%, var(--color-bg-primary) 100%);
}

.products-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: var(--space-xl);
}

.product-card {
    background: rgba(18, 23, 46, 0.4);
    border: 1px solid rgba(0, 217, 255, 0.2);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: all var(--transition-base);
}

.product-card:hover {
    transform: translateY(-10px);
    border-color: var(--color-primary);
    box-shadow: var(--shadow-lg);
}

.product-image {
    position: relative;
    height: 250px;
    background: linear-gradient(135deg, #1A1F3A 0%, #12172E 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.product-image.coming-soon::before {
    content: '即将上线';
    position: absolute;
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: rgba(0, 217, 255, 0.3);
}

.image-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(0, 217, 255, 0.1) 0%, rgba(123, 47, 255, 0.1) 100%);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.product-card:hover .image-overlay {
    opacity: 1;
}

.product-badge {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    padding: var(--space-xs) var(--space-md);
    background: var(--gradient-accent);
    color: var(--color-text-primary);
    border-radius: var(--radius-xl);
    font-size: var(--font-size-xs);
    font-weight: 600;
}

.product-content {
    padding: var(--space-xl);
}

.product-title {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--space-md);
    color: var(--color-text-primary);
}

.product-description {
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: var(--space-md);
}

.product-tags {
    display: flex;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
    flex-wrap: wrap;
}

.tag {
    padding: var(--space-xs) var(--space-md);
    background: rgba(0, 217, 255, 0.1);
    border: 1px solid rgba(0, 217, 255, 0.3);
    border-radius: var(--radius-xl);
    color: var(--color-primary);
    font-size: var(--font-size-xs);
}

.product-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* ==================== 新闻动态 ==================== */
.news {
    background: var(--color-bg-secondary);
}

.news-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--space-xl);
}

.news-card {
    display: flex;
    gap: var(--space-lg);
    padding: var(--space-xl);
    background: rgba(18, 23, 46, 0.4);
    border: 1px solid rgba(0, 217, 255, 0.2);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.news-card:hover {
    transform: translateY(-5px);
    border-color: var(--color-primary);
    box-shadow: var(--shadow-glow);
}

.news-date {
    min-width: 60px;
    text-align: center;
    padding: var(--space-sm);
    background: var(--gradient-primary);
    border-radius: var(--radius-md);
}

.date-day {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-text-primary);
}

.date-month {
    font-size: var(--font-size-sm);
    color: rgba(255, 255, 255, 0.8);
}

.news-content {
    flex: 1;
}

.news-category {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    background: rgba(123, 47, 255, 0.2);
    color: var(--color-secondary);
    border-radius: var(--radius-xl);
    font-size: var(--font-size-xs);
    font-weight: 600;
    margin-bottom: var(--space-sm);
}

.news-title {
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-sm);
    color: var(--color-text-primary);
}

.news-excerpt {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-md);
    line-height: 1.6;
}

.news-link {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 600;
    transition: all var(--transition-fast);
}

.news-link:hover {
    gap: var(--space-sm);
}

/* ==================== 联系我们 ==================== */
.contact {
    background: linear-gradient(180deg, var(--color-bg-secondary) 0%, var(--color-bg-primary) 100%);
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: var(--space-3xl);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.info-card {
    padding: var(--space-xl);
    text-align: center;
}

.info-icon {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--space-md);
}

.info-card h3 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-sm);
    color: var(--color-text-primary);
}

.info-card p {
    color: var(--color-text-secondary);
    line-height: 1.8;
}

/* ==================== 表单样式 ==================== */
.contact-form {
    padding: var(--space-xl);
}

.form-group {
    margin-bottom: var(--space-lg);
}

.form-group label {
    display: block;
    margin-bottom: var(--space-sm);
    color: var(--color-text-secondary);
    font-weight: 500;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--space-md);
    background: rgba(10, 14, 39, 0.5);
    border: 1px solid rgba(0, 217, 255, 0.2);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    font-size: var(--font-size-base);
    transition: all var(--transition-base);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(0, 217, 255, 0.1);
}

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

/* ==================== Footer ==================== */
.footer {
    background: var(--color-bg-secondary);
    padding: var(--space-3xl) 0 var(--space-xl);
    border-top: 1px solid rgba(0, 217, 255, 0.1);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: var(--space-3xl);
    margin-bottom: var(--space-xl);
}

.footer-title {
    font-size: var(--font-size-xl);
    margin-bottom: var(--space-md);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.footer-description {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-sm);
    line-height: 1.8;
}

.footer-motto {
    color: var(--color-primary);
    font-style: italic;
}

.footer-section h4 {
    font-size: var(--font-size-lg);
    margin-bottom: var(--space-md);
    color: var(--color-text-primary);
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--space-sm);
}

.footer-links a {
    color: var(--color-text-secondary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    padding-top: var(--space-xl);
    border-top: 1px solid rgba(0, 217, 255, 0.1);
    text-align: center;
    color: var(--color-text-muted);
}

.footer-bottom p {
    margin-bottom: var(--space-xs);
}

.footer-bottom a {
    color: var(--color-primary);
    text-decoration: none;
}

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

/* ==================== 返回顶部按钮 ==================== */
.back-to-top {
    position: fixed;
    bottom: var(--space-xl);
    right: var(--space-xl);
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    box-shadow: var(--shadow-md);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.back-to-top:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-glow);
}

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

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

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

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

/* ==================== 响应式设计 ==================== */
@media screen and (max-width: 1024px) {
    .hero-visual {
        display: none;
    }

    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: 1fr;
    }
}

@media screen and (max-width: 768px) {
    .nav-menu {
        display: none;
    }

    .mobile-menu-toggle {
        display: flex;
    }

    .hero {
        padding: var(--space-2xl) var(--space-md);
    }

    .hero-title {
        font-size: var(--font-size-4xl);
    }

    .hero-stats {
        flex-wrap: wrap;
    }

    .hero-cta {
        flex-direction: column;
    }

    .section-title {
        font-size: var(--font-size-3xl);
    }

    .about-features {
        grid-template-columns: 1fr;
    }

    .services-grid,
    .products-grid,
    .news-grid {
        grid-template-columns: 1fr;
    }

    .timeline-item {
        flex-direction: column;
    }
}

@media screen and (max-width: 480px) {
    .hero-title {
        font-size: var(--font-size-3xl);
    }

    .container {
        padding: 0 var(--space-md);
    }

    section {
        padding: var(--space-2xl) 0;
    }

    .btn-primary,
    .btn-outline {
        width: 100%;
        justify-content: center;
    }
}