/* CSS变量 - 统一管理颜色主题 */
:root {
    /* 主色调 */
    --primary-color: #4a90e2;
    --primary-dark: #357abd;
    --primary-light: #6ba3e8;
    
    /* 辅助色 */
    --secondary-color: #a8edea;
    --accent-color: #f093fb;
    
    /* 中性色 */
    --text-primary: #333;
    --text-secondary: #666;
    --text-light: #999;
    --background-white: #ffffff;
    --background-light: #f8f9fa;
    --background-dark: #333;
    --background-darker: #222;
    
    /* 渐变 */
    --gradient-primary: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    --gradient-hero: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    --gradient-about: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    --gradient-text: linear-gradient(45deg, #fff, var(--secondary-color));
    
    /* 阴影 */
    --shadow-light: 0 2px 10px rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 10px 30px rgba(0, 0, 0, 0.1);
    --shadow-heavy: 0 20px 60px rgba(0, 0, 0, 0.1);
    --shadow-primary: 0 10px 30px rgba(74, 144, 226, 0.3);
    
    /* 边距和尺寸 */
    --container-max-width: 1200px;
    --border-radius: 15px;
    --border-radius-large: 20px;
    --transition: all 0.3s ease;
    
    /* 字体 */
    --font-family: 'Microsoft YaHei', 'PingFang SC', 'Helvetica Neue', Arial, sans-serif;
    --font-size-small: 0.9rem;
    --font-size-base: 1rem;
    --font-size-large: 1.1rem;
    --font-size-xl: 1.3rem;
    --font-size-2xl: 1.8rem;
    --font-size-3xl: 2.5rem;
    --font-size-4xl: 3.5rem;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    line-height: 1.6;
    color: var(--text-primary);
    background: var(--gradient-hero);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* 通用容器 */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 2rem;
}

/* 导航栏 */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 1rem 0;
    transition: var(--transition);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: var(--shadow-light);
}

.nav-container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 2rem;
}

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
    font-size: var(--font-size-2xl);
    font-weight: bold;
    color: var(--primary-color);
    transition: var(--transition);
}

.logo-img {
    height: 40px;
    width: auto;
    margin-right: 0.5rem;
}

.logo:hover {
    color: var(--primary-dark);
    transform: scale(1.05);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 2rem;
    margin: 0;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    transition: var(--transition);
    padding: 0.5rem 1rem;
    border-radius: 8px;
    position: relative;
}

.nav-links a:hover,
.nav-links a:focus {
    color: var(--primary-color);
    background: rgba(74, 144, 226, 0.1);
}

.nav-links a.nav-link-special {
    background: var(--gradient-primary);
    color: white;
    border-radius: 20px;
    padding: 0.5rem 1.2rem;
}

.nav-links a.nav-link-special:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-primary);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--primary-color);
    transition: var(--transition);
    transform: translateX(-50%);
}

.nav-links a:hover::after,
.nav-links a:focus::after {
    width: 80%;
}

.nav-links a.nav-link-special::after {
    display: none;
}

/* 英雄区域 */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    color: white;
    position: relative;
    overflow: hidden;
    background: var(--gradient-hero);
    padding: 8rem 0 6rem 0;
}

.hero::before {
    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 1000 1000"><defs><radialGradient id="a" cx="50%" cy="50%" r="50%"><stop offset="0%" stop-color="%23ffffff" stop-opacity="0.1"/><stop offset="100%" stop-color="%23ffffff" stop-opacity="0"/></radialGradient></defs><circle cx="200" cy="200" r="100" fill="url(%23a)"/><circle cx="800" cy="300" r="150" fill="url(%23a)"/><circle cx="400" cy="700" r="120" fill="url(%23a)"/><circle cx="900" cy="800" r="80" fill="url(%23a)"/></svg>') no-repeat center center;
    background-size: cover;
    animation: float 20s ease-in-out infinite;
    opacity: 0.3;
}

@keyframes float {
    0%, 100% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(180deg); }
}

.hero-content {
    position: relative;
    z-index: 2;
    max-width: 800px;
    padding: 0 2rem;
}

.hero h1 {
    font-size: var(--font-size-4xl);
    margin-bottom: 1rem;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: glow 2s ease-in-out infinite alternate;
    font-weight: 700;
}

@keyframes glow {
    from { text-shadow: 0 0 20px rgba(255,255,255,0.5); }
    to { text-shadow: 0 0 30px rgba(255,255,255,0.8); }
}

.hero-subtitle {
    font-size: 1.25rem;
    margin-bottom: 3rem;
    opacity: 0.9;
}

.hero-highlights {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    justify-content: center;
    align-items: center;
    gap: 4rem;
    margin: 3rem 0;
    max-width: 1500px;
    margin-left: auto;
    margin-right: auto;
    padding: 0 1rem;
}

.highlight-item {
    position: relative;
    background: transparent;
    padding: 2rem 1.5rem;
    border: none;
    transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    text-align: center;
    min-height: 160px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    cursor: pointer;
    width: 100%;
}

.highlight-item:hover {
    transform: translateY(-10px);
}

.highlight-icon {
    font-size: 4rem;
    margin-bottom: 1.2rem;
    position: relative;
    background: linear-gradient(45deg, #ffffff, #a8edea, #f093fb);
    background-size: 200% 200%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    filter: drop-shadow(0 0 15px rgba(255, 255, 255, 0.4));
    transition: all 0.5s ease;
    animation: iconGlow 3s ease-in-out infinite alternate;
    font-family: 'Apple Color Emoji', 'Segoe UI Emoji', 'Noto Color Emoji', sans-serif;
    line-height: 1;
    display: block;
}

@keyframes iconGlow {
    0% {
        background-position: 0% 50%;
        filter: drop-shadow(0 0 15px rgba(255, 255, 255, 0.4));
    }
    100% {
        background-position: 100% 50%;
        filter: drop-shadow(0 0 25px rgba(168, 237, 234, 0.6));
    }
}

.highlight-item:hover .highlight-icon {
    transform: scale(1.3) rotateY(360deg);
    filter: drop-shadow(0 0 30px rgba(240, 147, 251, 0.8));
    animation-duration: 1s;
}

.highlight-item h3 {
    font-size: 1.2rem;
    margin: 0.8rem 0 0.5rem 0;
    font-weight: 700;
    position: relative;
    background: linear-gradient(45deg, #ffffff, #a8edea);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: 0 0 15px rgba(255, 255, 255, 0.5);
    letter-spacing: 0.5px;
    transition: all 0.3s ease;
}

.highlight-item:hover h3 {
    transform: scale(1.05);
    text-shadow: 0 0 20px rgba(168, 237, 234, 0.7);
}

.highlight-item p {
    font-size: 0.95rem;
    margin: 0;
    opacity: 0.95;
    position: relative;
    line-height: 1.5;
    color: rgba(255, 255, 255, 0.9);
    transition: all 0.3s ease;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.highlight-item:hover p {
    opacity: 1;
    color: rgba(255, 255, 255, 1);
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.3);
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 2.5rem;
    margin: 2.5rem 0;
    flex-wrap: wrap;
}

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

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    background: linear-gradient(45deg, #ffffffcf, #04265c);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.9rem;
    opacity: 0.8;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.hero-actions {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 2rem;
    flex-wrap: wrap;
}

.cta-button {
    display: inline-block;
    padding: 1rem 2rem;
    background: var(--gradient-primary);
    color: white;
    text-decoration: none;
    border-radius: 50px;
    font-weight: bold;
    transition: var(--transition);
    box-shadow: var(--shadow-primary);
    border: 2px solid transparent;
    font-size: var(--font-size-large);
}

.cta-button:hover,
.cta-button:focus {
    transform: translateY(-3px);
    box-shadow: 0 15px 40px rgba(74, 144, 226, 0.4);
    border-color: rgba(255, 255, 255, 0.3);
}

.cta-button.secondary {
    background: transparent;
    border-color: white;
    color: white;
}

.cta-button.secondary:hover {
    background: white;
    color: var(--primary-color);
}

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

/* 快速入口区域 */
.quick-access {
    padding: 5rem 0;
    background: var(--background-white);
}

.access-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
    gap: 3rem;
    max-width: 900px;
    margin: 0 auto;
}

.access-card {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 3rem;
    border-radius: 16px;
    text-align: center;
    transition: transform 0.3s ease;
}

.access-card:hover {
    transform: translateY(-5px);
}

.access-icon {
    font-size: 4rem;
    margin-bottom: 1.5rem;
}

.access-card h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
}

.access-card p {
    margin-bottom: 2rem;
    opacity: 0.9;
    line-height: 1.6;
}

.access-btn {
    display: inline-block;
    background: white;
    color: #667eea;
    padding: 0.75rem 2rem;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
}

.access-btn:hover {
    background: #f8f9fa;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

/* 产品展示区域 */
.products {
    padding: 4rem 0 3rem 0;
    background: var(--background-light);
}

.section-title {
    text-align: center;
    font-size: var(--font-size-3xl);
    margin-bottom: 3rem;
    color: var(--text-primary);
    position: relative;
    font-weight: 600;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: var(--gradient-primary);
    border-radius: 2px;
}

.product-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(450px, 1fr));
    gap: 2.5rem;
    margin-top: 4rem;
}

.product-card {
    background: var(--background-white);
    border-radius: var(--border-radius-large);
    padding: 2.5rem;
    box-shadow: var(--shadow-heavy);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(74, 144, 226, 0.1);
}

.product-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: var(--gradient-primary);
}

.product-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 30px 80px rgba(0, 0, 0, 0.15);
    border-color: var(--primary-color);
}

.product-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.product-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: var(--border-radius-large);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
    flex-shrink: 0;
}

.product-card h3 {
    font-size: var(--font-size-2xl);
    margin: 0;
    color: var(--text-primary);
    font-weight: 600;
}

.product-card p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.8;
    font-size: var(--font-size-large);
}

.features {
    list-style: none;
    margin-bottom: 2rem;
}

.features li {
    padding: 0.5rem 0;
    color: var(--text-secondary);
    position: relative;
    padding-left: 1.5rem;
    transition: var(--transition);
}

.features li:hover {
    color: var(--text-primary);
}

.features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
    font-size: 1.1rem;
}

.product-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    display: inline-block;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    border: 1px solid var(--primary-color);
}

.product-link:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

/* 关于我们 */
.about {
    padding: 5rem 0;
    background: var(--gradient-about);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-text h2 {
    font-size: var(--font-size-3xl);
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    font-weight: 600;
}

.about-text p {
    font-size: var(--font-size-large);
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

.about-actions {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

.btn-outline {
    display: inline-block;
    padding: 0.75rem 1.5rem;
    border: 2px solid var(--primary-color);
    color: var(--primary-color);
    text-decoration: none;
    border-radius: 8px;
    font-weight: 600;
    transition: var(--transition);
}

.btn-outline:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

.stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 2rem;
}

.stat {
    text-align: center;
    padding: 1.5rem;
    background: var(--background-white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-medium);
    transition: var(--transition);
    border: 1px solid rgba(74, 144, 226, 0.1);
}

.stat:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-heavy);
    border-color: var(--primary-color);
}

.stat-number {
    font-size: var(--font-size-3xl);
    font-weight: bold;
    color: #00BCD4;
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--text-secondary);
    font-size: var(--font-size-small);
    font-weight: 500;
}

/* 联系我们 */
.contact {
    padding: 5rem 0;
    background: var(--background-dark);
    color: white;
    text-align: center;
}

.contact h2 {
    font-size: var(--font-size-3xl);
    margin-bottom: 1rem;
    font-weight: 600;
}

.contact p {
    font-size: var(--font-size-xl);
    margin-bottom: 2rem;
    opacity: 0.8;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.contact-info {
    display: flex;
    justify-content: center;
    gap: 2rem;
    margin-top: 3rem;
    flex-wrap: wrap;
}

.contact-item {
    padding: 2rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.2);
    transition: var(--transition);
    max-width: 300px;
}

.contact-item:hover {
    background: rgba(255, 255, 255, 0.15);
    transform: translateY(-5px);
}

.contact-item h4 {
    margin-bottom: 0.5rem;
    color: var(--secondary-color);
    font-size: var(--font-size-large);
}

.contact-item p {
    margin: 0;
    font-size: var(--font-size-large);
    font-weight: 500;
}

.contact-actions {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 3rem;
    flex-wrap: wrap;
}

/* 页脚 */
.footer {
    background: var(--background-darker);
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.footer-logo {
    width: 32px;
    height: 32px;
}

.footer-brand-name {
    font-size: 1.25rem;
    font-weight: bold;
}

.footer-desc {
    opacity: 0.8;
    line-height: 1.6;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 2rem;
}

.link-group h4 {
    margin-bottom: 1rem;
    color: #ecf0f1;
}

.link-group a {
    display: block;
    color: #bdc3c7;
    text-decoration: none;
    margin-bottom: 0.5rem;
    transition: color 0.3s ease;
}

.link-group a:hover {
    color: white;
}

.footer-bottom {
    border-top: 1px solid #34495e;
    padding-top: 1rem;
    text-align: center;
    opacity: 0.8;
}

/* 动画效果 */
.fade-in {
    opacity: 0;
    transform: translateY(30px);
    transition: all 0.6s ease;
}

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

/* 响应式设计 */
@media (max-width: 1024px) {
    .product-grid {
        grid-template-columns: 1fr;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .access-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 1rem;
    }
    
    .nav-container {
        padding: 0 1rem;
    }
    
    .nav-links {
        display: none;
    }
    
    .hero {
        padding: 6rem 0 4rem 0;
    }
    
    .hero h1 {
        font-size: 2.5rem;
    }
    
    .hero-subtitle {
        font-size: 1.1rem;
        margin-bottom: 2rem;
    }
    
    .hero-highlights {
        grid-template-columns: repeat(2, 1fr);
        gap: 3rem;
        margin: 2rem 0;
        max-width: 800px;
        padding: 0 1rem;
    }
    
    .highlight-item {
        padding: 1.5rem 1rem;
        min-height: 140px;
        width: 100%;
    }
    
    .highlight-item:hover {
        transform: translateY(-6px);
    }
    
    .highlight-icon {
        font-size: 3rem;
        margin-bottom: 0.8rem;
    }
    
    .highlight-item:hover .highlight-icon {
        transform: scale(1.2) rotateY(180deg);
        animation-duration: 1.5s;
    }
    
    .highlight-item h3 {
        font-size: 1rem;
        margin: 0.6rem 0 0.4rem 0;
    }
    
    .highlight-item:hover h3 {
        transform: scale(1.03);
    }
    
    .highlight-item p {
        font-size: 0.85rem;
        max-width: 160px;
    }
    
    .hero-stats {
        gap: 2rem;
        margin: 2rem 0;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .stat-label {
        font-size: 0.8rem;
    }
    
    .product-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .product-card {
        padding: 2rem;
    }
    
    .stats {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .section-title {
        font-size: 2rem;
    }
    
    .about-text h2 {
        font-size: 2rem;
    }
    
    .contact h2 {
        font-size: 2rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .hero-actions {
        flex-direction: column;
        align-items: center;
    }
    
    .about-actions {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .contact-actions {
        flex-direction: column;
        align-items: center;
    }
}

@media (max-width: 480px) {
    .hero h1 {
        font-size: 2rem;
    }
    
    .hero-content {
        padding: 0 1rem;
    }
    
    .hero-highlights {
        grid-template-columns: 1fr;
        gap: 2.5rem;
        margin: 1.5rem 0;
        justify-items: center;
        padding: 0 1rem;
    }
    
    .highlight-item {
        padding: 1.5rem 1rem;
        min-height: 120px;
        width: 100%;
        max-width: 320px;
    }
    
    .highlight-item:hover {
        transform: translateY(-5px);
    }
    
    .highlight-icon {
        font-size: 2.5rem;
        margin-bottom: 0.6rem;
    }
    
    .highlight-item h3 {
        font-size: 0.9rem;
        margin: 0.5rem 0 0.3rem 0;
    }
    
    .highlight-item p {
        font-size: 0.8rem;
        white-space: normal;
        max-width: none;
    }
    
    .hero-stats {
        gap: 1.5rem;
        margin: 1.5rem 0;
    }
    
    .stat-number {
        font-size: 1.8rem;
    }
    
    .stat-label {
        font-size: 0.75rem;
    }
    
    .access-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
    
    .access-card {
        padding: 2rem;
    }
    
    .product-card {
        padding: 1.5rem;
    }
    
    .product-header {
        flex-direction: column;
        text-align: center;
        gap: 0.5rem;
    }
    
    .product-icon {
        width: 50px;
        height: 50px;
        font-size: 1.2rem;
    }
    
    .contact-info {
        flex-direction: column;
        align-items: center;
        gap: 1.5rem;
    }
    
    .contact-item {
        max-width: 100%;
        padding: 1.5rem;
    }
}