/* 全局样式 */
:root {
    --primary-color: #0066cc;
    --secondary-color: #00aaff;
    --dark-color: #333;
    --light-color: #f4f4f4;
    --danger-color: #dc3545;
    --success-color: #28a745;
    --max-width: 1200px;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
    background-color: #fff;
}

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

ul {
    list-style: none;
}

img {
    width: 100%;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
    overflow: hidden;
}

.btn {
    display: inline-block;
    background: var(--primary-color);
    color: #fff;
    padding: 12px 25px;
    border-radius: 5px;
    border: none;
    cursor: pointer;
    font-size: 16px;
    font-weight: 500;
    transition: all 0.3s ease;
}

.btn:hover {
    background: #0055aa;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.btn-small {
    padding: 8px 15px;
    font-size: 14px;
}

.section-title {
    font-size: 32px;
    text-align: center;
    margin-bottom: 40px;
    position: relative;
    color: var(--dark-color);
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--primary-color);
}

/* 导航栏 */
header {
    background-color: #fff;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 15px 20px;
}

.logo h1 {
    font-size: 24px;
    margin: 0;
    color: var(--primary-color);
}

nav ul {
    display: flex;
}

nav ul li {
    margin-left: 20px;
}

nav ul li a {
    color: var(--dark-color);
    font-weight: 500;
    padding: 10px;
    transition: all 0.3s ease;
}

nav ul li a:hover,
nav ul li a.active {
    color: var(--primary-color);
}

/* 英雄区域 */
.hero {
    background: linear-gradient(135deg, #00c6ff, #0072ff);
    height: 70vh;
    color: #fff;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('../images/hero-bg.jpg') no-repeat center center/cover;
    opacity: 0.2;
    z-index: 1;
}

.hero .container {
    position: relative;
    z-index: 2;
}

.hero-content {
    max-width: 600px;
}

.hero-content h2 {
    font-size: 48px;
    margin-bottom: 20px;
    line-height: 1.2;
}

.hero-content p {
    font-size: 20px;
    margin-bottom: 30px;
}

/* 特性区域 */
.features {
    padding: 80px 0;
}

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

.feature-card {
    background: #fff;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    padding: 30px;
    border-radius: 10px;
    text-align: center;
    transition: all 0.3s ease;
}

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

.feature-card i {
    font-size: 40px;
    color: var(--primary-color);
    margin-bottom: 20px;
}

.feature-card h3 {
    font-size: 22px;
    margin-bottom: 15px;
}

/* 解决方案区域 */
.solutions {
    padding: 80px 0;
    background-color: #f9fafc;
}

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

.solution-card {
    background: #fff;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

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

.solution-card img {
    height: 200px;
    object-fit: cover;
}

.solution-card h3 {
    font-size: 20px;
    padding: 20px 20px 10px;
}

.solution-card p {
    padding: 0 20px 20px;
}

.solution-card .btn-small {
    margin: 0 20px 20px;
}

/* 行动召唤区域 */
.cta {
    padding: 80px 0;
    background: linear-gradient(135deg, #00c6ff, #0072ff);
    color: #fff;
    text-align: center;
}

.cta h2 {
    font-size: 36px;
    margin-bottom: 15px;
}

.cta p {
    font-size: 18px;
    margin-bottom: 30px;
}

.cta .btn {
    background: #fff;
    color: var(--primary-color);
}

.cta .btn:hover {
    background: #f4f4f4;
}

/* 页脚 */
footer {
    background: #333;
    color: #fff;
    padding: 50px 0 20px;
}

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

.footer-about h3,
.footer-contact h3,
.footer-links h3 {
    margin-bottom: 20px;
    color: #fff;
    font-size: 18px;
}

.footer-contact p {
    margin-bottom: 10px;
}

.footer-contact i {
    margin-right: 10px;
}

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

.footer-links ul li a {
    color: #ccc;
    transition: all 0.3s ease;
}

.footer-links ul li a:hover {
    color: #fff;
    padding-left: 5px;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #555;
}

/* 响应式设计 */
@media (max-width: 768px) {
    .hero-content h2 {
        font-size: 36px;
    }

    .hero-content p {
        font-size: 18px;
    }

    nav ul {
        flex-direction: column;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background: #fff;
        box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
        display: none;
    }

    nav ul.show {
        display: block;
    }

    nav ul li {
        margin: 0;
        text-align: center;
        padding: 10px;
    }

    .mobile-toggle {
        display: block;
        font-size: 24px;
        cursor: pointer;
    }

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