/* 基本样式和字体 */
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", sans-serif, "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol", "Noto Color Emoji";
    line-height: 1.6;
    color: #555;
    background-color: #f4f7f6; /* 默认背景色 */
    margin: 0;
    padding: 0;
}

body.login-page {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 20px;
}

/* 顶部导航栏 */
.site-header {
    background-color: #2c3e50;
    color: #ecf0f1;
    padding: 15px 0;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.site-header .site-title {
    color: #ecf0f1;
    text-decoration: none;
    font-size: 1.5em;
    font-weight: bold;
}

.page-wrapper {
    max-width: 960px;
    margin: 0 auto;
    padding: 30px 20px;
}

main {
    background-color: #fff;
    padding: 20px;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.05);
}

/* 英雄区域 */
.hero {
    text-align: center;
    padding: 40px 20px;
    background-color: #4a90e2;
    color: white;
    border-radius: 8px;
    margin-bottom: 30px;
}

.hero h1 {
    margin: 0;
    font-size: 2.5em;
    font-weight: 600;
}

.hero p {
    font-size: 1.2em;
    margin-top: 10px;
}

/* 信息卡片区域 */
.info-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.card {
    background-color: #ffffff;
    border: 1px solid #e0e0e0;
    border-radius: 8px;
    padding: 25px;
    text-align: center;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.card-icon {
    font-size: 2.5em;
    color: #4a90e2;
    margin-bottom: 15px;
}

.card h2 {
    font-size: 1.5em;
    margin-top: 0;
    margin-bottom: 15px;
    color: #333;
}

.card p {
    margin: 10px 0;
    color: #555;
    font-size: 1em;
    line-height: 1.5;
}

.card p strong {
    color: #333;
}

/* 按钮容器和按钮 */
.btn-container {
    margin-top: 20px;
    display: flex;
    justify-content: center;
    gap: 15px;
}

.btn {
    display: inline-block;
    padding: 12px 24px;
    background-color: #28a745;
    color: white;
    text-decoration: none;
    border-radius: 5px;
    font-weight: 500;
    transition: background-color 0.3s ease;
}

.btn:hover {
    background-color: #218838;
}

.btn-secondary {
    background-color: #007bff;
}

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

/* 页脚 */
.site-footer {
    background-color: #2c3e50;
    color: #95a5a6;
    text-align: center;
    padding: 30px 0;
    font-size: 0.9em;
    margin-top: 30px;
    line-height: 1.8;
}

/* 错误信息样式 */
.error-message {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
    padding: 10px 15px;
    border-radius: 6px;
    margin-bottom: 20px;
}
/* --- 登录页面样式 --- */
.login-container {
    max-width: 400px;
    margin: 0 auto; /* 移除垂直外边距，仅保留水平居中（作为后备） */
    padding: 40px;
    background-color: #ffffff;
    border-radius: 12px;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
    text-align: center;
}

.login-container .page-header {
    margin-bottom: 20px;
}

.login-container .login-header {
    font-size: 2em;
    font-weight: 600;
    color: #333;
    margin-bottom: 25px;
}

.login-container .form-group {
    margin-bottom: 20px;
}

.login-container .form-control {
    width: 100%;
    padding: 12px 15px;
    font-size: 1em;
    border: 1px solid #ccc;
    border-radius: 6px;
    box-sizing: border-box;
    transition: border-color 0.3s;
}

.login-container .form-control:focus {
    border-color: #4a90e2;
    outline: none;
}

.login-container .captcha-wrapper {
    display: flex;
    align-items: center;
    gap: 10px;
}

.login-container .captcha-wrapper img {
    height: 45px;
    border-radius: 6px;
    cursor: pointer;
}

.login-container .btn {
    width: 100%;
    padding: 12px;
    font-size: 1.1em;
    font-weight: bold;
    background-color: #2c3e50;
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.login-container .btn:hover {
    background-color: #1a2531;
}