/* 全局样式重置和基础设置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #409eff;
    --primary-dark: #337ecc;
    --secondary-color: #67c23a;
    --accent-color: #e6a23c;
    --danger-color: #f56c6c;
    --text-primary: #303133;
    --text-regular: #606266;
    --text-secondary: #909399;
    --border-color: #dcdfe6;
    --bg-color: #f5f7fa;
    --white: #ffffff;
    --shadow-light: 0 2px 12px 0 rgba(0, 0, 0, 0.1);
    --shadow-medium: 0 4px 20px 0 rgba(0, 0, 0, 0.15);
    --transition: all 0.3s ease;
}

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

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

ul {
    list-style: none;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏样式 */
.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: var(--shadow-light);
    transition: var(--transition);
}

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

.navbar-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 24px;
    font-weight: bold;
    color: var(--primary-color);
}

.logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 20px;
}

.nav-menu {
    display: flex;
    gap: 30px;
}

.nav-link {
    color: var(--text-regular);
    font-weight: 500;
    padding: 8px 16px;
    border-radius: 6px;
    transition: var(--transition);
}

.nav-link:hover {
    color: var(--primary-color);
    background: rgba(64, 158, 255, 0.1);
}

.nav-actions {
    display: flex;
    gap: 12px;
}

.btn {
    padding: 10px 24px;
    border-radius: 6px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    font-size: 14px;
}

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

.btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(64, 158, 255, 0.3);
}

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

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

/* Hero区域 */
.hero {
    padding: 140px 0 80px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    position: relative;
    overflow: hidden;
}

/* Canvas动态背景 */
.hero-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    pointer-events: none;
}

.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 1200 600"><circle cx="200" cy="100" r="50" fill="rgba(255,255,255,0.1)"/><circle cx="800" cy="300" r="80" fill="rgba(255,255,255,0.08)"/><circle cx="1000" cy="150" r="60" fill="rgba(255,255,255,0.06)"/></svg>');
    opacity: 0.3;
    z-index: 1;
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero-text h1 {
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero-text .subtitle {
    font-size: 20px;
    margin-bottom: 30px;
    opacity: 0.95;
    line-height: 1.6;
}

.hero-badges {
    display: flex;
    gap: 15px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 20px;
    font-size: 14px;
    backdrop-filter: blur(10px);
}

.hero-actions {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

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

.btn-white:hover {
    background: rgba(255, 255, 255, 0.9);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

.btn-transparent {
    background: transparent;
    color: white;
    border: 2px solid white;
}

.btn-transparent:hover {
    background: white;
    color: var(--primary-color);
}

.hero-visual {
    position: relative;
}

.demo-card {
    background: white;
    border-radius: 16px;
    padding: 20px;
    box-shadow: var(--shadow-medium);
    transform: perspective(1000px) rotateY(-5deg);
    transition: var(--transition);
}

.demo-card:hover {
    transform: perspective(1000px) rotateY(0deg);
}

.demo-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 15px;
}

.demo-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.demo-dot.red { background: #ff5f57; }
.demo-dot.yellow { background: #ffbd2e; }
.demo-dot.green { background: #28c840; }

.demo-preview {
    background: var(--bg-color);
    border-radius: 8px;
    height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.graph-animation {
    width: 100%;
    height: 100%;
    position: relative;
}

.node {
    position: absolute;
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-radius: 50%;
    animation: float 3s ease-in-out infinite;
}

.node:nth-child(1) { top: 20%; left: 30%; animation-delay: 0s; }
.node:nth-child(2) { top: 40%; left: 60%; animation-delay: 0.5s; }
.node:nth-child(3) { top: 60%; left: 40%; animation-delay: 1s; }
.node:nth-child(4) { top: 30%; left: 70%; animation-delay: 1.5s; }

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

/* 功能特性区域 */
.features {
    padding: 80px 0;
    background: white;
}

.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-title {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.section-subtitle {
    font-size: 18px;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
}

.feature-card {
    padding: 30px;
    border-radius: 12px;
    background: white;
    border: 1px solid var(--border-color);
    transition: var(--transition);
    cursor: pointer;
}

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

.feature-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 28px;
    margin-bottom: 20px;
    color: white;
}

.feature-icon.blue { background: linear-gradient(135deg, #667eea, #764ba2); }
.feature-icon.green { background: linear-gradient(135deg, #67c23a, #85ce61); }
.feature-icon.orange { background: linear-gradient(135deg, #e6a23c, #f0c78a); }
.feature-icon.purple { background: linear-gradient(135deg, #9c27b0, #c56cf0); }

.feature-title {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--text-primary);
}

.feature-desc {
    color: var(--text-secondary);
    line-height: 1.6;
}

/* 版本对比区域 */
.versions {
    padding: 80px 0;
    background: var(--bg-color);
}

.version-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.version-card {
    background: white;
    border-radius: 16px;
    padding: 40px;
    box-shadow: var(--shadow-light);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.version-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
}

.version-card.featured {
    border: 2px solid var(--primary-color);
}

.version-badge {
    position: absolute;
    top: 20px;
    right: -35px;
    background: var(--primary-color);
    color: white;
    padding: 5px 40px;
    transform: rotate(45deg);
    font-size: 12px;
    font-weight: 600;
}

.version-header {
    margin-bottom: 30px;
}

.version-name {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 10px;
}

.version-price {
    font-size: 36px;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 10px;
}

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

.version-features {
    margin-bottom: 30px;
}

.version-feature-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
}

.version-feature-item:last-child {
    border-bottom: none;
}

.check-icon {
    color: var(--secondary-color);
    font-weight: bold;
}

/* 在线演示区域 */
.demo-section {
    padding: 80px 0;
    background: white;
}

.demo-tabs {
    margin-top: 40px;
}

.tab-buttons {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
    flex-wrap: wrap;
    justify-content: center;
}

.tab-btn {
    padding: 12px 24px;
    border: 2px solid var(--border-color);
    background: white;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
}

.tab-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.tab-btn:hover:not(.active) {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.demo-frame {
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-medium);
    background: var(--bg-color);
}

.demo-iframe {
    width: 100%;
    height: 600px;
    border: none;
}

/* 案例展示区域 */
.cases {
    padding: 80px 0;
    background: var(--bg-color);
}

.cases-carousel {
    margin-top: 40px;
    position: relative;
}

.carousel-container {
    overflow: hidden;
    border-radius: 12px;
}

.carousel-track {
    display: flex;
    transition: transform 0.5s ease;
}

.carousel-slide {
    min-width: 100%;
    position: relative;
    padding: 0 10px;
}

/* 案例卡片网格布局 */
.case-cards-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    padding: 10px;
}

.case-card {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: var(--shadow-light);
    transition: var(--transition);
    cursor: pointer;
    background: white;
    text-decoration: none;
    color: inherit;
}

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

.case-card img {
    width: 100%;
    height: 280px;
    object-fit: cover;
    display: block;
}

.case-card-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.85) 0%, rgba(0,0,0,0.6) 60%, transparent 100%);
    padding: 25px 20px 20px;
    color: white;
    transition: var(--transition);
}

.case-card:hover .case-card-overlay {
    background: linear-gradient(to top, rgba(64,158,255,0.9) 0%, rgba(64,158,255,0.7) 60%, transparent 100%);
}

.case-card-overlay h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
    line-height: 1.3;
}

.case-card-overlay p {
    font-size: 14px;
    opacity: 0.9;
    line-height: 1.5;
    margin: 0;
}

.carousel-controls {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    margin-top: 30px;
}

.carousel-btn {
    width: 45px;
    height: 45px;
    border-radius: 50%;
    border: 2px solid var(--border-color);
    background: white;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 16px;
    color: var(--text-regular);
}

.carousel-btn:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    transform: scale(1.1);
}

.carousel-indicator {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-regular);
    min-width: 60px;
    text-align: center;
}

.carousel-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(0,0,0,0.7), transparent);
    padding: 30px;
    color: white;
}

.carousel-controls {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-top: 20px;
}

.carousel-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 2px solid var(--border-color);
    background: white;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.carousel-btn:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* 下载区域 */
.download {
    padding: 80px 0;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.download-content {
    text-align: center;
}

.download-title {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 20px;
}

.download-desc {
    font-size: 18px;
    margin-bottom: 40px;
    opacity: 0.9;
}

.download-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.download-btn {
    padding: 16px 40px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: 2px solid white;
    background: white;
    color: var(--primary-color);
}

.download-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.2);
}

.download-btn.secondary {
    background: transparent;
    color: white;
}

.download-btn.secondary:hover {
    background: white;
    color: var(--primary-color);
}

/* 联系方式区域 */
.contact {
    padding: 80px 0;
    background: white;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-top: 40px;
}

.contact-card {
    padding: 30px;
    border-radius: 12px;
    background: var(--bg-color);
    text-align: center;
    transition: var(--transition);
}

.contact-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-medium);
}

.contact-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto 20px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 24px;
}

.contact-label {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
}

.contact-value {
    color: var(--text-secondary);
    font-size: 16px;
}

/* 页脚 */
.footer {
    background: var(--text-primary);
    color: white;
    padding: 40px 0;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-links {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
}

.footer-link {
    color: rgba(255, 255, 255, 0.7);
    transition: var(--transition);
}

.footer-link:hover {
    color: white;
}

.footer-copyright {
    color: rgba(255, 255, 255, 0.6);
    font-size: 14px;
}

/* 回到顶部按钮 */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--primary-color);
    color: white;
    border: none;
    cursor: pointer;
    box-shadow: var(--shadow-medium);
    transition: var(--transition);
    opacity: 0;
    visibility: hidden;
    z-index: 999;
}

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

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-3px);
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .hero-text h1 {
        font-size: 32px;
    }

    .nav-menu {
        display: none;
    }

    .section-title {
        font-size: 28px;
    }

    /* 案例卡片响应式 */
    .case-cards-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }

    .case-card img {
        height: 220px;
    }

    .carousel-btn {
        width: 40px;
        height: 40px;
        font-size: 14px;
    }

    .version-cards {
        grid-template-columns: 1fr;
    }

    .demo-iframe {
        height: 400px;
    }
}

@media (max-width: 1024px) and (min-width: 769px) {
    .case-cards-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

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

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

.slide-in-left {
    opacity: 0;
    transform: translateX(-50px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.slide-in-left.visible {
    opacity: 1;
    transform: translateX(0);
}

.slide-in-right {
    opacity: 0;
    transform: translateX(50px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.slide-in-right.visible {
    opacity: 1;
    transform: translateX(0);
}