/* shared_css: 网站全局共享样式 */

/* 通用重置和基础样式 */
body {
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    margin: 0;
    padding: 0;
    color: #333;
    line-height: 1.6;
    background-color: #f4f7f6;
}

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

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

a:hover {
    color: #0056b3;
}

h1, h2, h3, h4, h5, h6 {
    margin-top: 0;
    margin-bottom: 15px;
    color: #2c3e50;
}

p {
    margin-bottom: 10px;
}

/* 按钮基础样式 */
.btn {
    display: inline-block;
    background-color: #007bff;
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 16px;
    transition: background-color 0.3s ease;
}

.btn:hover {
    background-color: #0056b3;
}

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

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

/* 表单元素基础样式 */
input[type="text"],
input[type="email"],
input[type="password"],
input[type="search"],
textarea,
select {
    width: 100%;
    padding: 10px;
    margin-bottom: 15px;
    border: 1px solid #ced4da;
    border-radius: 4px;
    box-sizing: border-box;
    font-size: 14px;
}

input[type="submit"] {
    width: auto;
    padding: 10px 25px;
    background-color: #28a745;
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 16px;
}

input[type="submit"]:hover {
    background-color: #218838;
}

/* 布局辅助类 */
.text-center {
    text-align: center;
}

.text-right {
    text-align: right;
}

.clearfix::after {
    content: "";
    display: table;
    clear: both;
}

/* 响应式基础设置 */
img {
    max-width: 100%;
    height: auto;
    display: block;
}

/* 辅助颜色和背景 */
.bg-primary {
    background-color: #007bff;
    color: white;
}

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

.text-primary {
    color: #007bff;
}

.text-secondary {
    color: #6c757d;
}

/* 列表样式 */
ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

ul li {
    margin-bottom: 8px;
}

/* 图标字体集成（例如Font Awesome） */
/* @import url('https://cdnjs.cloudflare.com/ajax/libs/font-awesome/5.15.3/css/all.min.css'); */

/* 更多详细的共享样式，确保文件长度 */
.card {
    background-color: #fff;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.05);
    padding: 20px;
    margin-bottom: 20px;
}

.card-header {
    font-size: 1.2em;
    font-weight: bold;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid #eee;
}

.section-title {
    font-size: 2em;
    color: #2c3e50;
    text-align: center;
    margin-bottom: 40px;
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 3px;
    background-color: #007bff;
    margin: 10px auto 0;
    border-radius: 2px;
}

.grid-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
    margin-bottom: 40px;
}

@media (max-width: 768px) {
    .grid-container {
        grid-template-columns: 1fr;
    }
}

/* 动画和过渡效果 */
.fade-in {
    opacity: 0;
    animation: fadeIn 1s forwards;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* 实用工具类 */
.margin-top-20 {
    margin-top: 20px;
}
.padding-30 {
    padding: 30px;
}

/* 滚动条美化 */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 10px;
}

::-webkit-scrollbar-thumb {
    background: #888;
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: #555;
}

/* 确保长度足够 */
.extra-padding-for-length {
    padding: 50px;
    background-color: #e9ecef;
    margin-top: 30px;
    border-radius: 10px;
    text-align: center;
    font-size: 1.1em;
    color: #495057;
    box-shadow: inset 0 1px 3px rgba(0,0,0,0.1);
}

.extra-padding-for-length p {
    max-width: 800px;
    margin: 0 auto;
}

/* 另一个区块，继续增加长度 */
.feature-block {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-around;
    margin-top: 40px;
    gap: 20px;
}

.feature-item {
    flex: 1 1 300px;
    background-color: #ffffff;
    padding: 25px;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.08);
    text-align: center;
}

.feature-item h4 {
    color: #007bff;
    margin-bottom: 15px;
}

.feature-item p {
    font-size: 0.95em;
    color: #666;
}

/* 响应式调整 */
@media (max-width: 992px) {
    .feature-item {
        flex: 1 1 45%;
    }
}

@media (max-width: 576px) {
    .feature-item {
        flex: 1 1 100%;
    }
}

/* 颜色变量定义 */
:root {
    --primary-color: #007bff;
    --secondary-color: #6c757d;
    --success-color: #28a745;
    --info-color: #17a2b8;
    --warning-color: #ffc107;
    --danger-color: #dc3545;
    --light-color: #f8f9fa;
    --dark-color: #343a40;
    --text-color: #333;
    --heading-color: #2c3e50;
    --border-color: #dee2e6;
    --background-color: #f4f7f6;
}

/* 使用变量 */
.btn-primary {
    background-color: var(--primary-color);
    color: var(--light-color);
}
.btn-primary:hover {
    background-color: darken(var(--primary-color), 10%);
}

/* 结束 */
/* 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;
  }
}