/* 全局重置 */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: "Microsoft Yahei", sans-serif;
}

body {
    color: #333;
    line-height: 1.6;
    background-color: #f8f9fa;
}

.container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

/* 页头导航 */
.header {
    background-color: #2c3e50;
    padding: 15px 0;
}

.nav-container {
    width: 90%;
    max-width: 1200px;
    margin: 0 auto;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-link {
    color: #fff;
    text-decoration: none;
    font-size: 16px;
    transition: color 0.3s ease;
}

.nav-link:hover {
    color: #3498db;
}

/* 横幅区域 */
.hero-section {
    position: relative;
    width: 100%;
    overflow: hidden;
}

.hero-bg img {
    width: 100%;
    height: 600px;
    object-fit: cover;
}

.hero-content {
    position: absolute;
    top: 50%;
    left: 10%;
    transform: translateY(-50%);
    text-align: left;
}

.hero-content h1 {
    font-size: 48px;
    color: #fff;
    margin-bottom: 20px;
    text-shadow: 0 2px 4px rgba(0,0,0,0.5);
}

.download-btn {
    display: inline-block;
    padding: 15px 30px;
    background-color: #e74c3c;
    color: #fff;
    text-decoration: none;
    font-size: 18px;
    border-radius: 5px;
    transition: background-color 0.3s ease;
}

.download-btn:hover {
    background-color: #c0392b;
}

/* 通用区块标题 */
.section-title {
    font-size: 32px;
    text-align: center;
    margin: 50px 0 15px;
    color: #2c3e50;
}

.section-subtitle {
    font-size: 18px;
    text-align: center;
    color: #7f8c8d;
    margin-bottom: 40px;
}

/* 欧洲杯介绍区块 */
.euro-intro-section {
    padding: 20px 0 50px;
}

.intro-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.intro-card {
    background-color: #fff;
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

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

.intro-card h3 {
    font-size: 20px;
    color: #2c3e50;
    margin-bottom: 15px;
}

.intro-card p {
    font-size: 14px;
    color: #555;
    line-height: 1.7;
}

/* 下载区块 */
.download-section {
    padding: 50px 0;
    background-color: #f1f1f1;
}

.download-boxes {
    display: flex;
    justify-content: center;
    gap: 50px;
    flex-wrap: wrap;
}

.download-box {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 20px 35px;
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    text-decoration: none;
    color: #2c3e50;
    font-size: 18px;
    transition: all 0.3s ease;
}

.download-box img {
    width: 60px;
    height: 60px;
}

.download-box:hover {
    background-color: #3498db;
    color: #fff;
}

.register-btn {
    padding: 20px 40px;
    background-color: #2ecc71;
    color: #fff;
}

.register-btn:hover {
    background-color: #27ae60;
}

/* 欧洲杯详细介绍 */
.euro-detail-section {
    padding: 50px 0;
}

.detail-text {
    font-size: 16px;
    color: #444;
    line-height: 1.8;
    text-align: justify;
    margin-top: 20px;
}

/* APP功能区块 */
.app-feature-section {
    padding: 20px 0 80px;
}

.feature-cards {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.feature-card {
    background-color: #fff;
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
}

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

.feature-card h3 {
    font-size: 20px;
    color: #2c3e50;
    margin-bottom: 15px;
}

.feature-card p {
    font-size: 14px;
    color: #555;
    line-height: 1.7;
}

/* 页尾 */
.footer {
    background-color: #2c3e50;
    color: #fff;
    padding: 50px 0 20px;
}

.footer-top {
    text-align: center;
    margin-bottom: 30px;
}

.friend-link {
    color: #3498db;
    text-decoration: none;
    font-size: 16px;
}

.friend-link:hover {
    text-decoration: underline;
}

.footer-middle {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin-bottom: 40px;
}

.footer-column h4 {
    font-size: 18px;
    margin-bottom: 20px;
    position: relative;
    padding-bottom: 10px;
}

.footer-column h4::after {
    content: "";
    position: absolute;
    left: 0;
    bottom: 0;
    width: 40px;
    height: 2px;
    background-color: #3498db;
}

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

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

.footer-list a {
    color: #bdc3c7;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-list a:hover {
    color: #3498db;
}

.qrcode img {
    width: 120px;
    height: 120px;
    border-radius: 8px;
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid #34495e;
}

.copyright {
    color: #bdc3c7;
    font-size: 14px;
}

/* 响应式适配 */
@media (max-width: 768px) {
    .intro-cards, .feature-cards {
        grid-template-columns: repeat(2, 1fr);
    }

    .footer-middle {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .hero-bg img {
        height: 400px;
    }
}

@media (max-width: 480px) {
    .intro-cards, .feature-cards {
        grid-template-columns: 1fr;
    }

    .footer-middle {
        grid-template-columns: 1fr;
    }

    .nav-list {
        flex-direction: column;
        gap: 10px;
        align-items: center;
    }

    .hero-content {
        left: 5%;
        right: 5%;
        text-align: center;
    }

    .hero-content h1 {
        font-size: 24px;
    }

    .download-btn {
        padding: 10px 20px;
        font-size: 16px;
    }
}