/* General shared styles for the entire site */
body {
    font-family: 'PingFang SC', 'Helvetica Neue', Helvetica, Arial, sans-serif;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    color: #333;
    background-color: #f8f9fa;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

*, *::before, *::after {
    box-sizing: inherit;
}

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

a:hover {
    color: #0056b3;
}

h1, h2, h3, h4, h5, h6 {
    margin-top: 0;
    margin-bottom: 0.5em;
    font-weight: 600;
    line-height: 1.2;
}

p {
    margin-top: 0;
    margin-bottom: 1em;
}

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

/* Utility classes */
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }
.mt-20 { margin-top: 20px; }
.mb-20 { margin-bottom: 20px; }
.py-40 { padding-top: 40px; padding-bottom: 40px; }

/* Buttons */
.btn {
    display: inline-block;
    font-weight: 400;
    color: #212529;
    text-align: center;
    vertical-align: middle;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    background-color: transparent;
    border: 1px solid transparent;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    line-height: 1.5;
    border-radius: 0.25rem;
    transition: color 0.15s ease-in-out, background-color 0.15s ease-in-out, border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.btn-primary {
    color: #fff;
    background-color: #007bff;
    border-color: #007bff;
}

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

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

.btn-secondary:hover {
    color: #fff;
    background-color: #5a6268;
    border-color: #545b62;
}

/* Form elements */
input[type="text"],
input[type="email"],
input[type="password"],
textarea {
    width: 100%;
    padding: 10px;
    margin-bottom: 15px;
    border: 1px solid #ced4da;
    border-radius: 4px;
    box-shadow: inset 0 1px 2px rgba(0,0,0,0.075);
    transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

input[type="text"]:focus,
input[type="email"]:focus,
textarea:focus {
    border-color: #80bdff;
    outline: 0;
    box-shadow: 0 0 0 0.2rem rgba(0, 123, 255, 0.25);
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
    h1 { font-size: 2.5rem; }
    h2 { font-size: 2rem; }
}
@media (max-width: 480px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.75rem; }
    .btn { padding: 0.6rem 1rem; font-size: 0.9rem; }
}
/* 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;
  }
}