/* shared_css: This stylesheet contains global styles applicable across the entire site. */
body {
    font-family: 'Roboto', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
    color: #333;
    line-height: 1.6;
    background-color: #f8f9fa;
    margin: 0;
    padding: 0;
}

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

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    margin-bottom: 15px;
    color: #222;
}

h1 { font-size: 2.5em; }
h2 { font-size: 2em; }
h3 { font-size: 1.75em; }
h4 { font-size: 1.5em; }

p {
    margin-bottom: 1em;
}

a {
    color: #007bff;
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: #0056b3;
    text-decoration: underline;
}

button, .button {
    display: inline-block;
    background-color: #007bff;
    color: #fff;
    padding: 12px 25px;
    border-radius: 5px;
    font-size: 1em;
    font-weight: 500;
    text-align: center;
    cursor: pointer;
    border: none;
    transition: background-color 0.3s ease, transform 0.2s ease;
}

button:hover, .button:hover {
    background-color: #0056b3;
    transform: translateY(-2px);
}

.button-secondary {
    background-color: #6c757d;
}

.button-secondary:hover {
    background-color: #5a6268;
}

.section-heading {
    text-align: center;
    margin-bottom: 50px;
    padding-top: 30px;
}

.section-heading h2 {
    font-size: 3em;
    position: relative;
    display: inline-block;
    padding-bottom: 10px;
}

.section-heading h2::after {
    content: '';
    position: absolute;
    left: 50%;
    bottom: 0;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background-color: #007bff;
    border-radius: 2px;
}

.card {
    background-color: #fff;
    border-radius: 8px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.05);
    padding: 30px;
    margin-bottom: 20px;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.1);
}

/* Utility Classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.mb-1 { margin-bottom: 10px; }
.mb-2 { margin-bottom: 20px; }
.mb-3 { margin-bottom: 30px; }
.mt-1 { margin-top: 10px; }
.mt-2 { margin-top: 20px; }
.mt-3 { margin-top: 30px; }
.py-5 { padding-top: 50px; padding-bottom: 50px; }
.bg-light { background-color: #f8f9fa; }
.bg-primary { background-color: #007bff; color: #fff; }

/* Responsive adjustments */
@media (max-width: 768px) {
    h1 { font-size: 2em; }
    h2 { font-size: 1.75em; }
    .section-heading h2 { font-size: 2.5em; }
    .container { padding: 0 15px; }
    button, .button { padding: 10px 20px; font-size: 0.9em; }
}

@media (max-width: 480px) {
    h1 { font-size: 1.8em; }
    h2 { font-size: 1.5em; }
    .section-heading h2 { font-size: 2em; }
}

/* Additional common elements */
.list-unstyled {
    padding-left: 0;
    list-style: none;
}

.list-inline {
    padding-left: 0;
    list-style: none;
}

.list-inline-item {
    display: inline-block;
}

.list-inline-item:not(:last-child) {
    margin-right: 10px;
}

.img-fluid {
    max-width: 100%;
    height: auto;
}

/* Form elements styling */
.form-group {
    margin-bottom: 1rem;
}

.form-control {
    display: block;
    width: 100%;
    padding: 0.5rem 0.75rem;
    font-size: 1rem;
    line-height: 1.5;
    color: #495057;
    background-color: #fff;
    background-clip: padding-box;
    border: 1px solid #ced4da;
    border-radius: 0.25rem;
    transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.form-control:focus {
    color: #495057;
    background-color: #fff;
    border-color: #80bdff;
    outline: 0;
    box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
}

textarea.form-control {
    min-height: 80px;
}

label {
    display: inline-block;
    margin-bottom: 0.5rem;
}

/* Alerts and messages */
.alert {
    position: relative;
    padding: 0.75rem 1.25rem;
    margin-bottom: 1rem;
    border: 1px solid transparent;
    border-radius: 0.25rem;
}

.alert-success {
    color: #155724;
    background-color: #d4edda;
    border-color: #c3e6cb;
}

.alert-danger {
    color: #721c24;
    background-color: #f8d7da;
    border-color: #f5c6cb;
}

.alert-info {
    color: #0c5460;
    background-color: #d1ecf1;
    border-color: #bee5eb;
}

.alert-warning {
    color: #856404;
    background-color: #fff3cd;
    border-color: #ffeeba;
}

/* Font Awesome integration */
.fas, .fab {
    margin-right: 8px;
}

@import url('https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.15.4/css/all.min.css');
/* 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;
  }
}