* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', 'Microsoft YaHei', sans-serif;
}

:root {
    --primary: #0078d4;
    --primary-dark: #005a9e;
    --secondary: #6c63ff;

    /* --primary: #4a6cf7;
    --primary-dark: #3a5ae0;
    --secondary: #6c63ff; */

    --accent: #00b894;
    --dark: #1e2a3a;
    --light: #f8f9fa;
    --gray: #6c757d;
    --gradient: linear-gradient(135deg, var(--primary), var(--secondary));
}

body {
    color: var(--dark);
    background-color: #fff;
    line-height: 1.6;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 导航栏样式 */
header {
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.08);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    transition: all 0.3s ease;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 6px 0;
}

.logo {
    color: var(--primary);
    display: flex;
    align-items: center;
}

.logo-icon {
    height: 38px;
    width: 38px;
    background: linear-gradient(45deg, #3b82f6, #8b5cf6);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-right: 12px;
    font-size: 18px;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.1);
    /* 增加立体感 */
}

.logo i {
    font-size: 22px;
    color: white;
    /* 关键：白色图标 */
    text-shadow: 0 -1px 2px rgba(0, 0, 0, 0.3);
    /* 深色投影，增强可读性 */
}

.logo a {
    font-size: 28px;
    font-weight: 500;
    text-decoration: none;
    color: var(--primary-dark);
    /* transition: color 0.3s; */
}

.nav-links {
    display: flex;
    list-style: none;
}

.nav-links li {
    margin-left: 30px;
}

.nav-links a {
    text-decoration: none;
    color: var(--dark);
    font-weight: 500;
    transition: color 0.3s;
}

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

.cta-button {
    background: var(--gradient);
    color: white;
    border: none;
    padding: 10px 25px;
    border-radius: 30px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    box-shadow: 0 4px 15px rgba(74, 108, 247, 0.3);
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(74, 108, 247, 0.4);
}

/* 英雄区域样式 */
.hero {
    padding: 180px 0 100px;
    background: linear-gradient(135deg, #f5f7ff 0%, #eef1ff 100%);
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 1440 320"><path fill="%234a6cf7" fill-opacity="0.05" d="M0,224L48,213.3C96,203,192,181,288,181.3C384,181,480,203,576,202.7C672,203,768,181,864,170.7C960,160,1056,160,1152,176C1248,192,1344,224,1392,240L1440,256L1440,0L1392,0C1344,0,1248,0,1152,0C1056,0,960,0,864,0C768,0,672,0,576,0C480,0,384,0,288,0C192,0,96,0,48,0L0,0Z"></path></svg>');
    background-size: cover;
    background-position: center;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    font-size: 3.5rem;
    margin-bottom: 20px;
    color: var(--dark);
    line-height: 1.2;
}

.hero p {
    font-size: 1.2rem;
    color: var(--gray);
    margin-bottom: 30px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-top: 30px;
}

.secondary-button {
    background: white;
    color: var(--primary);
    border: 2px solid var(--primary);
    padding: 10px 25px;
    border-radius: 30px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
}

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

/* 功能亮点区域样式 */
.features {
    padding: 100px 0;
    background-color: white;
}

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

.section-title h2 {
    font-size: 2.5rem;
    color: var(--dark);
    margin-bottom: 15px;
}

.section-title p {
    color: var(--gray);
    max-width: 600px;
    margin: 0 auto;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.feature-card {
    background: white;
    border-radius: 10px;
    padding: 30px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
    transition: transform 0.3s, box-shadow 0.3s;
    border-top: 4px solid var(--primary);
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.1);
}

.feature-icon {
    width: 60px;
    height: 60px;
    background: var(--gradient);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: white;
    font-size: 24px;
}

.feature-card h3 {
    font-size: 1.4rem;
    margin-bottom: 15px;
    color: var(--dark);
}

.feature-card p {
    color: var(--gray);
}

/* 技术优势区域样式 */
.tech {
    padding: 100px 0;
    background: linear-gradient(135deg, #f5f7ff 0%, #eef1ff 100%);
}

.tech-content {
    display: flex;
    align-items: center;
    gap: 50px;
}

.tech-text {
    flex: 1;
}

.tech-text h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
    color: var(--dark);
}

.tech-text p {
    color: var(--gray);
    margin-bottom: 30px;
}

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

.tech-list li {
    margin-bottom: 15px;
    display: flex;
    align-items: center;
}

.tech-list i {
    color: var(--accent);
    margin-right: 10px;
    font-size: 1.2rem;
}

.tech-visual {
    flex: 1;
    background: var(--gradient);
    border-radius: 10px;
    height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
    font-weight: 600;
    box-shadow: 0 10px 30px rgba(74, 108, 247, 0.3);
}

/* 应用场景区域样式 */
.use-cases {
    padding: 100px 0;
    background-color: white;
}

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

.case-card {
    background: white;
    border-radius: 10px;
    padding: 30px;
    text-align: center;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
    transition: all 0.3s;
}

.case-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.case-icon {
    width: 80px;
    height: 80px;
    background: var(--gradient);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    color: white;
    font-size: 30px;
}

.case-card h3 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: var(--dark);
}

.case-card p {
    color: var(--gray);
}

/* CTA区域样式 */
.cta-section {
    padding: 100px 0;
    background: var(--gradient);
    color: white;
    text-align: center;
}

.cta-section h2 {
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.cta-section p {
    margin-bottom: 30px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    opacity: 0.9;
}

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

.cta-section .cta-button:hover {
    background: rgba(255, 255, 255, 0.9);
}

/* 页脚样式 */
footer {
    background: var(--dark);
    color: white;
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 40px;
    margin-bottom: 40px;
}

.footer-column h3 {
    font-size: 1.2rem;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}

.footer-column h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 40px;
    height: 3px;
    background: var(--primary);
}

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

.footer-links li {
    margin-bottom: 10px;
    position: relative;
}

.footer-links a {
    color: #a0a7b3;
    text-decoration: none;
    transition: color 0.3s;
    cursor: pointer;
    display: inline-block;
    padding: 5px 0;
}

.footer-links a:hover {
    color: white;
}

.contact-info {
    display: none;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 5px;
    padding: 10px;
    margin-top: 5px;
    font-size: 0.9rem;
    color: #e0e0e0;
    border-left: 3px solid var(--primary);
}

.contact-info.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-5px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.copyright {
    text-align: center;
    margin: 20px;
    font-size: 13px;
    color: var(--secondary-color);
    opacity: 0.8;
}

.copyright a {
    color: inherit;
    /* 继承 .copyright 的 #999 */
    text-decoration: none;
}

/* 悬停时给一点交互反馈（可选） */
.copyright a:hover {
    color: #fff;
    text-decoration: underline;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2.5rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
    }

    .tech-content {
        flex-direction: column;
    }

    .nav-links {
        display: none;
    }

    .mobile-menu {
        display: block;
    }
}