/* shared_css: 共享样式文件 */
body {
    font-family: 'Noto Sans SC', sans-serif;
    line-height: 1.6;
    color: #333;
    margin: 0;
    padding: 0;
    background-color: #f4f7f6;
}
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}
h1, h2, h3, h4, h5, h6 {
    color: #2c3e50;
    margin-top: 20px;
    margin-bottom: 10px;
}
p {
    margin-bottom: 10px;
}
a {
    color: #007bff;
    text-decoration: none;
}
a:hover {
    text-decoration: underline;
}
.btn {
    display: inline-block;
    padding: 10px 20px;
    font-size: 16px;
    font-weight: 500;
    text-align: center;
    white-space: nowrap;
    vertical-align: middle;
    cursor: pointer;
    border: 1px solid transparent;
    border-radius: 4px;
    transition: all 0.3s ease;
}
.btn-primary {
    color: #fff;
    background-color: #007bff;
    border-color: #007bff;
}
.btn-primary:hover {
    background-color: #0056b3;
    border-color: #0056b3;
}
.section-title {
    font-size: 2.5em;
    font-weight: 700;
    text-align: center;
    margin-bottom: 40px;
    position: relative;
    padding-bottom: 15px;
}
.section-title::after {
    content: '';
    position: absolute;
    left: 50%;
    bottom: 0;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background-color: #007bff;
    border-radius: 2px;
}
.card {
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    padding: 25px;
    margin-bottom: 20px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}
.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.1);
}
/* Footer specific styles */
.footer-container {
    background-color: #2c3e50;
    color: #ecf0f1;
    padding: 40px 0;
    font-size: 15px;
}
.footer-content {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-around;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}
.footer-section {
    flex: 1;
    min-width: 250px;
    margin: 20px;
}
.footer-section h3 {
    color: #fff;
    margin-bottom: 20px;
    font-size: 1.3em;
}
.footer-section p, .footer-section ul {
    color: #bdc3c7;
    line-height: 1.8;
}
.footer-section ul {
    list-style: none;
    padding: 0;
}
.footer-section ul li {
    margin-bottom: 10px;
}
.footer-section a {
    color: #bdc3c7;
    text-decoration: none;
}
.footer-section a:hover {
    color: #007bff;
    text-decoration: underline;
}
.social-icons a {
    display: inline-block;
    margin-right: 15px;
}
.social-icons img {
    width: 30px;
    height: 30px;
    filter: invert(70%) sepia(10%) saturate(200%) hue-rotate(180deg) brightness(100%) contrast(90%); /* Lighten icons */
    transition: filter 0.3s ease;
}
.social-icons img:hover {
    filter: invert(100%) sepia(0%) saturate(0%) hue-rotate(0deg) brightness(100%) contrast(100%); /* White on hover */
}
.footer-bottom {
    text-align: center;
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid #34495e;
    color: #95a5a6;
}
@media (max-width: 768px) {
    .footer-content {
        flex-direction: column;
        align-items: center;
    }
    .footer-section {
        margin: 15px 0;
        text-align: center;
    }
    .footer-section ul {
        text-align: center;
        padding-left: 0;
    }
    .social-icons {
        text-align: center;
    }
}
/* 移动端内容区防溢出（系统追加，请勿删除） */
@media (max-width: 768px) {
  .page-content img {
    max-width: 100% !important;
    height: auto !important;
    display: block;
  }
  .page-content {
    overflow-x: hidden;
    max-width: 100%;
  }
  body {
    overflow-x: hidden;
  }
}