* {
    box-sizing: border-box;
}
body {
    margin: 0;
    font-family: -apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,"Noto Sans","Liberation Sans",sans-serif;
    background: #f5f7fb;
    color: #222;
}
a {
    text-decoration: none;
    color: inherit;
}
.container {
    width: 100%;
    max-width: 1100px;
    margin: 0 auto;
    padding: 16px;
}
.site-header {
    background: linear-gradient(135deg, #4b6cb7, #182848);
    color: #fff;
    box-shadow: 0 2px 8px rgba(0,0,0,.1);
}
.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 0;
}
.logo-area {
    display: flex;
    align-items: center;
    gap: 10px;
}
.logo-circle {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: rgba(255,255,255,.15);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
}
.logo-text .logo-title {
    font-weight: 600;
}
.logo-text .logo-subtitle {
    font-size: 12px;
    opacity: .85;
}
.nav-links a {
    margin-left: 16px;
    font-size: 14px;
    opacity: 0.95;
}
.nav-links a.admin-link {
    padding: 6px 10px;
    border-radius: 16px;
    background: rgba(255,255,255,.15);
    border: 1px solid rgba(255,255,255,.3);
}
.nav-links a:hover {
    opacity: 1;
}
.site-footer {
    margin-top: 32px;
    padding: 12px 0;
    font-size: 13px;
    color: #777;
    text-align: center;
}

/* 前台内容 */
.search-section {
    margin: 18px 0;
}
.search-section form {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}
.search-section input[type="text"] {
    flex: 1;
    min-width: 220px;
    padding: 8px 10px;
    border-radius: 6px;
    border: 1px solid #d0d5dd;
    background: #fff;
}
.search-section button {
    padding: 8px 14px;
    border-radius: 6px;
    border: none;
    background: #4b6cb7;
    color: #fff;
    cursor: pointer;
}
.search-section .btn-clear {
    padding: 8px 14px;
    border-radius: 6px;
    border: 1px solid #d0d5dd;
    background: #fff;
    font-size: 14px;
}
.section-title {
    margin: 18px 0 10px;
    font-size: 18px;
    font-weight: 600;
}
.category-section {
    margin-bottom: 24px;
}
.card-grid {
    display: grid;
    gap: 12px;
    grid-template-columns: repeat(auto-fill,minmax(260px,1fr));
}
.site-card {
    background: #fff;
    border-radius: 12px;
    padding: 14px;
    box-shadow: 0 1px 4px rgba(15,23,42,.08);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}
.site-card h3 {
    margin: 0 0 6px;
    font-size: 15px;
}
.site-desc {
    margin: 0 0 8px;
    font-size: 13px;
    color: #555;
}
.site-meta {
    font-size: 12px;
    color: #999;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.badge {
    padding: 2px 6px;
    border-radius: 10px;
    background: #eef2ff;
    color: #4f46e5;
}
.time {
    font-variant-numeric: tabular-nums;
}
.visit-btn {
    margin-top: 8px;
    padding: 8px 10px;
    border-radius: 8px;
    border: none;
    background: #10b981;
    color: #fff;
    text-align: center;
    font-size: 14px;
}

/* 通用 */
.empty-tip {
    font-size: 14px;
    color: #888;
    margin-top: 10px;
}

/* 后台登录 */
.admin-login-box {
    max-width: 360px;
    margin: 40px auto;
    background: #fff;
    border-radius: 12px;
    padding: 22px;
    box-shadow: 0 2px 8px rgba(15,23,42,.15);
}
.admin-login-box h1 {
    text-align: center;
    margin-bottom: 16px;
}
.admin-login-box form {
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.admin-login-box input[type="password"],
.form-vertical input[type="text"],
.form-vertical input[type="url"],
.form-vertical input[type="number"],
.form-vertical textarea,
.form-vertical select {
    padding: 8px 10px;
    border-radius: 6px;
    border: 1px solid #d0d5dd;
    font-size: 14px;
    background: #fff;
}
.admin-login-box button {
    margin-top: 4px;
    padding: 8px 10px;
    border-radius: 6px;
    border: none;
    background: #4b6cb7;
    color: #fff;
    cursor: pointer;
}
.error-msg {
    color: #dc2626;
    font-size: 13px;
}

/* 后台公共样式 */
.admin-header {
    margin: 18px 0 10px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.admin-actions a {
    margin-left: 8px;
}
.btn-primary {
    background: #4b6cb7;
    color: #fff;
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 14px;
}
.btn-secondary {
    background: #e5e7eb;
    color: #111827;
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 14px;
}
.btn-text {
    font-size: 13px;
    color: #4b6cb7;
}
.admin-table {
    width: 100%;
    border-collapse: collapse;
    background: #fff;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 1px 4px rgba(15,23,42,.1);
    font-size: 13px;
}
.admin-table th,
.admin-table td {
    padding: 8px 10px;
    border-bottom: 1px solid #e5e7eb;
}
.admin-table th {
    background: #f9fafb;
    text-align: left;
}
.admin-table tr:last-child td {
    border-bottom: none;
}
.link-btn {
    font-size: 13px;
    color: #2563eb;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0 4px;
}
.link-danger {
    color: #dc2626;
}
.form-vertical {
    max-width: 520px;
    background: #fff;
    padding: 16px;
    border-radius: 12px;
    box-shadow: 0 1px 4px rgba(15,23,42,.1);
    display: flex;
    flex-direction: column;
    gap: 10px;
}
.form-vertical label {
    font-size: 13px;
    color: #374151;
}
.form-vertical button {
    align-self: flex-start;
}
.form-inline form {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 12px;
}
.form-inline input[type="text"],
.form-inline input[type="number"] {
    padding: 6px 8px;
    border-radius: 6px;
    border: 1px solid #d0d5dd;
    font-size: 13px;
}
.inline-form {
    display: inline-flex;
    gap: 4px;
    align-items: center;
}
.stats-section {
    display: flex;
    gap: 12px;
    margin: 14px 0 20px;
}
.stat-card {
    flex: 1;
    background: #fff;
    border-radius: 12px;
    padding: 14px;
    box-shadow: 0 1px 4px rgba(15,23,42,.1);
}
.stat-number {
    font-size: 22px;
    font-weight: 600;
}
.stat-label {
    font-size: 13px;
    color: #6b7280;
    margin-top: 4px;
}

/* 响应式 */
@media (max-width: 640px) {
    .header-inner {
        flex-direction: column;
        align-items: flex-start;
        gap: 6px;
    }
    .nav-links {
        width: 100%;
        display: flex;
        justify-content: flex-end;
    }
    .stats-section {
        flex-direction: column;
    }
}