/* 
* Imception 网站样式
* 科技风 + 适老化设计
*/

/* ========== 全局变量 ========== */
:root {
    /* 颜色方案 - 科技蓝色系 */
    --primary-color: #2196F3;
    --primary-dark: #1976D2;
    --primary-light: #BBDEFB;
    --secondary-color: #00BCD4;
    --accent-color: #FF4081;
    
    /* 渐变色 */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-secondary: linear-gradient(135deg, #2196F3 0%, #00BCD4 100%);
    --gradient-overlay: linear-gradient(135deg, rgba(33, 150, 243, 0.9) 0%, rgba(0, 188, 212, 0.9) 100%);
    
    /* 文字颜色 */
    --text-primary: #212121;
    --text-secondary: #757575;
    --text-light: #FFFFFF;
    
    /* 背景颜色 */
    --bg-primary: #FFFFFF;
    --bg-secondary: #F5F5F5;
    --bg-dark: #263238;
    
    /* 边框和阴影 */
    --border-radius: 12px;
    --box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --box-shadow-hover: 0 8px 16px rgba(0, 0, 0, 0.15);
    
    /* 字体大小 - 适老化（比常规大20%） */
    --font-size-base: 19.2px;  /* 16px * 1.2 */
    --font-size-large: 22.8px;  /* 19px * 1.2 */
    --font-size-xlarge: 28.8px;  /* 24px * 1.2 */
    --font-size-h1: 57.6px;  /* 48px * 1.2 */
    --font-size-h2: 43.2px;  /* 36px * 1.2 */
    --font-size-h3: 33.6px;  /* 28px * 1.2 */
    
    /* 间距 */
    --spacing-xs: 8px;
    --spacing-sm: 16px;
    --spacing-md: 24px;
    --spacing-lg: 48px;
    --spacing-xl: 80px;
    
    /* 过渡效果 */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* ========== 重置和基础样式 ========== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

body {
    font-family: 'Noto Sans SC', 'Microsoft YaHei', 'PingFang SC', sans-serif;
    font-size: var(--font-size-base);
    line-height: 1.8;
    color: var(--text-primary);
    background-color: var(--bg-primary);
    overflow-x: hidden;
}

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

/* ========== 导航栏 ========== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    transition: var(--transition-normal);
}

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

.logo h1 {
    font-size: var(--font-size-h3);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0;
}

.logo .tagline {
    font-size: var(--font-size-base);
    color: var(--text-secondary);
    margin-top: 4px;
}

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

.nav-link {
    color: var(--text-primary);
    text-decoration: none;
    font-size: var(--font-size-large);
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius);
    transition: var(--transition-fast);
    position: relative;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-color);
    background: var(--primary-light);
}

.mobile-menu-btn {
    display: none;
    flex-direction: column;
    gap: 6px;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-xs);
}

.mobile-menu-btn span {
    width: 30px;
    height: 3px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition-fast);
}

/* ========== 主页横幅 ========== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding-top: 100px;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-secondary);
    z-index: -2;
}

.hero-background::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        radial-gradient(circle at 20% 50%, rgba(255, 255, 255, 0.2) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(255, 255, 255, 0.2) 0%, transparent 50%);
    animation: float 20s ease-in-out infinite;
}

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

.hero-content {
    position: relative;
    z-index: 1;
    color: var(--text-light);
}

.hero-title {
    font-size: var(--font-size-h1);
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.hero-subtitle {
    font-size: var(--font-size-h3);
    margin-bottom: var(--spacing-sm);
    font-weight: 500;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.hero-description {
    font-size: var(--font-size-large);
    margin-bottom: var(--spacing-lg);
    opacity: 0.95;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
}

/* ========== 按钮样式 ========== */
.btn {
    display: inline-block;
    padding: 18px 40px;  /* 增大按钮尺寸 */
    font-size: var(--font-size-large);
    font-weight: 600;
    text-decoration: none;
    border-radius: var(--border-radius);
    transition: var(--transition-normal);
    cursor: pointer;
    border: none;
    text-align: center;
    min-width: 160px;  /* 最小宽度 */
}

.btn-primary {
    background: var(--text-light);
    color: var(--primary-color);
    box-shadow: var(--box-shadow);
}

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--box-shadow-hover);
}

.btn-secondary {
    background: transparent;
    color: var(--text-light);
    border: 2px solid var(--text-light);
}

.btn-secondary:hover {
    background: var(--text-light);
    color: var(--primary-color);
}

.btn-large {
    padding: 20px 50px;
    font-size: var(--font-size-xlarge);
}

/* ========== 滚动指示器 ========== */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    color: var(--text-light);
    text-align: center;
    animation: bounce 2s infinite;
}

.scroll-indicator span {
    display: block;
    font-size: var(--font-size-base);
    margin-bottom: var(--spacing-xs);
}

.scroll-arrow {
    width: 24px;
    height: 24px;
    border-left: 2px solid var(--text-light);
    border-bottom: 2px solid var(--text-light);
    transform: rotate(-45deg);
    margin: 0 auto;
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

/* ========== 通用区块样式 ========== */
section {
    padding: var(--spacing-xl) 0;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-title {
    font-size: var(--font-size-h2);
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    font-size: var(--font-size-large);
    color: var(--text-secondary);
}

/* ========== 服务区块 ========== */
.service-section {
    background: var(--bg-secondary);
}

.service-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-md);
}

.service-card {
    background: var(--bg-primary);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: var(--transition-normal);
    text-align: center;
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--box-shadow-hover);
}

.service-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto var(--spacing-md);
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
}

.service-icon svg {
    width: 40px;
    height: 40px;
}

.service-card h3 {
    font-size: var(--font-size-h3);
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.service-card p {
    font-size: var(--font-size-large);
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ========== 成果区块 ========== */
.achievements-section {
    background: var(--bg-primary);
}

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

.achievement-card {
    background: var(--gradient-secondary);
    color: var(--text-light);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: var(--box-shadow);
    transition: var(--transition-normal);
}

.achievement-card:hover {
    transform: scale(1.05);
    box-shadow: var(--box-shadow-hover);
}

.achievement-icon {
    width: 70px;
    height: 70px;
    margin: 0 auto var(--spacing-md);
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.achievement-icon svg {
    width: 36px;
    height: 36px;
}

.achievement-number {
    font-size: 54px;  /* 超大数字 */
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.achievement-card h3 {
    font-size: var(--font-size-h3);
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
}

.achievement-card p {
    font-size: var(--font-size-large);
    opacity: 0.9;
}

/* ========== 特点区块 ========== */
.features-section {
    background: var(--bg-secondary);
}

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

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

.feature-item {
    display: flex;
    gap: var(--spacing-md);
    background: var(--bg-primary);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
    transition: var(--transition-normal);
}

.feature-item:hover {
    transform: translateX(10px);
    box-shadow: var(--box-shadow-hover);
}

.feature-number {
    font-size: var(--font-size-h2);
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    min-width: 80px;
}

.feature-content h3 {
    font-size: var(--font-size-h3);
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.feature-content p {
    font-size: var(--font-size-large);
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ========== 大脑动画 ========== */
.features-image {
    display: flex;
    align-items: center;
    justify-content: center;
}

.brain-animation {
    position: relative;
    width: 300px;
    height: 300px;
}

.brain-circle {
    position: absolute;
    border-radius: 50%;
    border: 3px solid var(--primary-color);
}

.brain-circle:nth-child(1) {
    width: 300px;
    height: 300px;
    animation: pulse 3s ease-in-out infinite;
    opacity: 0.3;
}

.brain-circle:nth-child(2) {
    width: 200px;
    height: 200px;
    top: 50px;
    left: 50px;
    animation: pulse 3s ease-in-out infinite 0.5s;
    opacity: 0.5;
}

.brain-circle:nth-child(3) {
    width: 100px;
    height: 100px;
    top: 100px;
    left: 100px;
    background: var(--gradient-primary);
    animation: pulse 3s ease-in-out infinite 1s;
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        opacity: 0.3;
    }
    50% {
        transform: scale(1.1);
        opacity: 0.8;
    }
}

/* ========== 联系区块 ========== */
.contact-section {
    background: var(--bg-primary);
}

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

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

.contact-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
    transition: var(--transition-normal);
}

.contact-item:hover {
    transform: translateX(10px);
    box-shadow: var(--box-shadow);
}

.contact-icon {
    width: 60px;
    height: 60px;
    min-width: 60px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-light);
}

.contact-icon svg {
    width: 30px;
    height: 30px;
}

.contact-item h4 {
    font-size: var(--font-size-xlarge);
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.contact-item p {
    font-size: var(--font-size-large);
    color: var(--text-secondary);
}

/* ========== 表单样式 ========== */
.contact-form-wrapper {
    background: var(--bg-secondary);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
    box-shadow: var(--box-shadow);
}

.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: var(--font-size-large);
    font-weight: 600;
    color: var(--text-primary);
}

.form-group input,
.form-group textarea {
    padding: 18px;  /* 增大输入框 */
    font-size: var(--font-size-large);
    border: 2px solid #E0E0E0;
    border-radius: var(--border-radius);
    font-family: inherit;
    transition: var(--transition-fast);
}

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

.form-group textarea {
    resize: vertical;
    min-height: 150px;
}

/* ========== 页脚 ========== */
.footer {
    background: var(--bg-dark);
    color: var(--text-light);
    padding: var(--spacing-lg) 0 var(--spacing-md);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.footer-section h3,
.footer-section h4 {
    font-size: var(--font-size-xlarge);
    margin-bottom: var(--spacing-sm);
}

.footer-section p,
.footer-section li {
    font-size: var(--font-size-large);
    opacity: 0.8;
    line-height: 2;
}

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

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

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

.social-links {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.social-links a {
    width: 50px;
    height: 50px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-normal);
}

.social-links a:hover {
    background: var(--primary-color);
    transform: translateY(-5px);
}

.social-links svg {
    width: 24px;
    height: 24px;
}

.footer-bottom {
    text-align: center;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    font-size: var(--font-size-large);
    opacity: 0.7;
}

/* ========== 返回顶部按钮 ========== */
.back-to-top {
    position: fixed;
    bottom: 40px;
    right: 40px;
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    color: var(--text-light);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    box-shadow: var(--box-shadow);
    transition: var(--transition-normal);
    opacity: 0;
    visibility: hidden;
    z-index: 999;
}

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

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

.back-to-top svg {
    width: 24px;
    height: 24px;
}

/* ========== 动画效果 ========== */
[data-aos] {
    opacity: 0;
    transition-property: transform, opacity;
}

[data-aos].aos-animate {
    opacity: 1;
}

[data-aos="fade-up"] {
    transform: translateY(50px);
}

[data-aos="fade-up"].aos-animate {
    transform: translateY(0);
}

[data-aos="fade-right"] {
    transform: translateX(-50px);
}

[data-aos="fade-right"].aos-animate {
    transform: translateX(0);
}

[data-aos="fade-left"] {
    transform: translateX(50px);
}

[data-aos="fade-left"].aos-animate {
    transform: translateX(0);
}

[data-aos="zoom-in"] {
    transform: scale(0.9);
}

[data-aos="zoom-in"].aos-animate {
    transform: scale(1);
}

/* ========== 响应式设计 ========== */
@media (max-width: 968px) {
    :root {
        --font-size-h1: 43.2px;
        --font-size-h2: 33.6px;
        --font-size-h3: 26.4px;
    }
    
    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background: rgba(255, 255, 255, 0.98);
        flex-direction: column;
        align-items: center;
        padding: var(--spacing-lg);
        transition: var(--transition-normal);
        backdrop-filter: blur(10px);
    }
    
    .nav-menu.active {
        left: 0;
    }
    
    .mobile-menu-btn {
        display: flex;
    }
    
    .features-content,
    .contact-content {
        grid-template-columns: 1fr;
    }
    
    .brain-animation {
        width: 200px;
        height: 200px;
    }
    
    .brain-circle:nth-child(1) {
        width: 200px;
        height: 200px;
    }
    
    .brain-circle:nth-child(2) {
        width: 130px;
        height: 130px;
        top: 35px;
        left: 35px;
    }
    
    .brain-circle:nth-child(3) {
        width: 70px;
        height: 70px;
        top: 65px;
        left: 65px;
    }
}

@media (max-width: 576px) {
    :root {
        --font-size-h1: 33.6px;
        --font-size-h2: 28.8px;
        --font-size-h3: 22.8px;
        --spacing-lg: 32px;
        --spacing-xl: 48px;
    }
    
    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .btn {
        width: 100%;
    }
    
    .service-grid,
    .achievements-grid {
        grid-template-columns: 1fr;
    }
    
    .feature-item {
        flex-direction: column;
        text-align: center;
    }
    
    .feature-number {
        min-width: auto;
    }
    
    .back-to-top {
        width: 50px;
        height: 50px;
        bottom: 20px;
        right: 20px;
    }
}

/* ========== 打印样式 ========== */
@media print {
    .navbar,
    .hero-buttons,
    .contact-form-wrapper,
    .back-to-top,
    .scroll-indicator {
        display: none;
    }
    
    body {
        font-size: 12pt;
        color: #000;
    }
}

/* ========== 高对比度模式支持 ========== */
@media (prefers-contrast: high) {
    :root {
        --primary-color: #0D47A1;
        --text-primary: #000000;
        --text-secondary: #333333;
    }
    
    .service-card,
    .achievement-card,
    .feature-item,
    .contact-item {
        border: 2px solid var(--text-primary);
    }
}