/* sitecss/style.css */
:root {
    --primary: #1a5f7a;
    --secondary: #ff9a00;
    --accent: #2ecc71;
    --dark: #2c3e50;
    --light: #f8fafc;
    --gray: #6c757d;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    --shadow-hover: 0 15px 40px rgba(0, 0, 0, 0.12);
    --radius: 16px;
    --transition: all 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Noto Sans SC', 'Microsoft YaHei', sans-serif;
    line-height: 1.8;
    color: var(--dark);
    background-color: var(--light);
    overflow-x: hidden;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 40px;
}

/* 增强的头部设计 */
header {
    background: linear-gradient(145deg, var(--primary) 0%, #0d3d52 100%);
    color: white;
    padding: 140px 0 100px;
    text-align: center;
    position: relative;
    overflow: hidden;
    clip-path: polygon(0 0, 100% 0, 100% 90%, 0 100%);
}

.header-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.1;
    background-image: 
        radial-gradient(circle at 20% 30%, rgba(255, 154, 0, 0.3) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(46, 204, 113, 0.2) 0%, transparent 50%);
}

.logo-container {
    display: inline-flex;
    align-items: center;
    margin-bottom: 25px;
    padding: 15px 30px;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: 50px;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.logo-icon {
    font-size: 2.8rem;
    margin-right: 15px;
    color: var(--secondary);
}

.logo-text {
    font-size: 2.8rem;
    font-weight: 700;
    letter-spacing: 1px;
}

.logo-text span {
    color: var(--secondary);
    position: relative;
}

.tagline {
    font-size: 1.4rem;
    font-weight: 300;
    max-width: 800px;
    margin: 0 auto 40px;
    line-height: 1.6;
    opacity: 0.9;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: 50px;
    margin-top: 60px;
    flex-wrap: wrap;
}

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

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--secondary);
    display: block;
    line-height: 1;
}

.stat-label {
    font-size: 0.95rem;
    opacity: 0.8;
    margin-top: 8px;
}

/* 主内容区域 */
.hero-section {
    padding: 100px 0 80px;
    position: relative;
    z-index: 1;
}

.section-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: 60px;
    position: relative;
    padding-bottom: 20px;
}

.section-title:after {
    content: '';
    position: absolute;
    width: 100px;
    height: 5px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    border-radius: 3px;
}

.highlight {
    background: linear-gradient(120deg, rgba(255, 154, 0, 0.1) 0%, rgba(46, 204, 113, 0.1) 100%);
    padding: 4px 12px;
    border-radius: 6px;
    font-weight: 600;
    color: var(--primary);
}

/* 功能网格 - 增强设计 */
.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 40px;
    margin: 80px 0;
}

.feature-card {
    background: white;
    border-radius: var(--radius);
    padding: 40px 35px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
    border: 1px solid rgba(0, 0, 0, 0.05);
}

.feature-card:before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 5px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
}

.feature-card:hover {
    transform: translateY(-15px);
    box-shadow: var(--shadow-hover);
}

.feature-icon {
    font-size: 3.2rem;
    margin-bottom: 25px;
    color: var(--primary);
    display: inline-block;
    padding: 15px;
    background: rgba(26, 95, 122, 0.08);
    border-radius: 15px;
}

.feature-card h3 {
    font-size: 1.6rem;
    font-weight: 600;
    margin-bottom: 20px;
    color: var(--dark);
}

.feature-list {
    list-style: none;
}

.feature-list li {
    padding: 12px 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    position: relative;
    padding-left: 32px;
    font-size: 1.05rem;
}

.feature-list li:before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--accent);
    font-weight: bold;
    font-size: 1.2rem;
}

/* 优势部分 */
.advantages-section {
    padding: 100px 0;
    background: linear-gradient(135deg, #f5f7fa 0%, #e4e8f0 100%);
    border-radius: 40px;
    margin: 80px 0;
    position: relative;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 35px;
}

.advantage-card {
    background: white;
    border-radius: var(--radius);
    padding: 35px 30px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    text-align: center;
}

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

.advantage-icon {
    font-size: 2.8rem;
    color: var(--primary);
    margin-bottom: 20px;
    display: inline-block;
    width: 80px;
    height: 80px;
    line-height: 80px;
    background: rgba(26, 95, 122, 0.1);
    border-radius: 50%;
}

/* 应用场景 */
.use-cases-section {
    padding: 100px 0;
}

.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 35px;
}

.use-case-card {
    background: white;
    border-radius: var(--radius);
    padding: 35px 30px;
    box-shadow: var(--shadow);
    transition: var(--transition);
    border-left: 5px solid var(--primary);
}

.use-case-card:hover {
    border-left-color: var(--secondary);
    transform: translateX(5px);
}

.use-case-card h4 {
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 15px;
    color: var(--dark);
}

/* 联系区域 */
.contact-section {
    padding: 100px 0;
    background: linear-gradient(145deg, var(--dark) 0%, #1a252f 100%);
    color: white;
    border-radius: 40px 40px 0 0;
    margin-top: 80px;
}

.contact-container {
    max-width: 900px;
    margin: 0 auto;
    text-align: center;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin: 50px 0;
}

.contact-item {
    background: rgba(255, 255, 255, 0.08);
    border-radius: 15px;
    padding: 25px;
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition);
}

.contact-item:hover {
    background: rgba(255, 255, 255, 0.12);
    transform: translateY(-5px);
}

.contact-icon {
    font-size: 2.2rem;
    color: var(--secondary);
    margin-bottom: 15px;
}

.contact-item p {
    font-size: 1.1rem;
}

.contact-item a {
    color: white;
    text-decoration: none;
    transition: color 0.3s;
}

.contact-item a:hover {
    color: var(--secondary);
}

.cta-button {
    background: linear-gradient(90deg, var(--secondary), #ff7b00);
    color: white;
    border: none;
    padding: 20px 50px;
    font-size: 1.3rem;
    font-weight: 600;
    border-radius: 50px;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 8px 25px rgba(255, 154, 0, 0.3);
    letter-spacing: 1px;
    margin-top: 40px;
    text-decoration: none;
    display: inline-block;
    text-align: center;
}

.cta-button:hover {
    transform: translateY(-5px) scale(1.05);
    box-shadow: 0 15px 35px rgba(255, 154, 0, 0.4);
}

/* 增强的页脚 */
footer {
    background: #151f28;
    color: #aaa;
    padding: 60px 0 30px;
}

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

.footer-logo {
    font-size: 1.8rem;
    font-weight: 700;
    color: white;
    margin-bottom: 15px;
}

.footer-logo span {
    color: var(--secondary);
}

.footer-about {
    font-size: 0.95rem;
    line-height: 1.7;
    opacity: 0.8;
}

.footer-links h4, .footer-contact h4 {
    color: white;
    font-size: 1.2rem;
    margin-bottom: 20px;
    font-weight: 600;
}

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

.footer-links li {
    margin-bottom: 12px;
}

.footer-links a {
    color: #aaa;
    text-decoration: none;
    transition: color 0.3s;
}

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

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 30px;
    text-align: center;
    font-size: 0.9rem;
}

.beian {
    margin-top: 20px;
    line-height: 1.8;
}

.beian a {
    color: #aaa;
    text-decoration: none;
    margin: 0 10px;
}

.beian a:hover {
    color: var(--secondary);
    text-decoration: underline;
}

/* 响应式设计 */
@media (max-width: 992px) {
    .container {
        padding: 0 30px;
    }
    
    header {
        padding: 100px 0 80px;
    }
    
    .logo-text {
        font-size: 2.2rem;
    }
    
    .section-title {
        font-size: 2.2rem;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 20px;
    }
    
    .features-grid, .advantages-grid, .use-cases-grid, .contact-info {
        grid-template-columns: 1fr;
    }
    
    .hero-stats {
        gap: 30px;
    }
    
    .stat-number {
        font-size: 2rem;
    }
    
    .section-title {
        font-size: 1.9rem;
    }
}

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

.fade-in {
    animation: fadeInUp 0.8s ease forwards;
}

.delay-1 {
    animation-delay: 0.2s;
}

.delay-2 {
    animation-delay: 0.4s;
}

.delay-3 {
    animation-delay: 0.6s;
}