/* ========================================
   全局变量 & 基础重置
   ======================================== */
:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #dbeafe;
    --secondary: #0f172a;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    --radius: 12px;
    --shadow: 0 4px 24px rgba(0,0,0,0.06);
    --shadow-hover: 0 8px 32px rgba(0,0,0,0.10);
    --transition: 0.3s ease;
    --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font);
    background: var(--gray-50);
    color: var(--gray-800);
    line-height: 1.6;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color var(--transition);
}
a:hover {
    color: var(--primary-dark);
}

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

/* ========================================
   头部导航
   ======================================== */
header {
    background: var(--secondary);
    color: #fff;
    padding: 16px 0;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    position: sticky;
    top: 0;
    z-index: 100;
}
header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}
header h1 {
    font-size: 24px;
    font-weight: 700;
}
header h1 a {
    color: #fff;
}
header nav {
    display: flex;
    gap: 20px;
    align-items: center;
    flex-wrap: wrap;
}
header nav a {
    color: rgba(255,255,255,0.8);
    font-size: 15px;
    padding: 6px 0;
    border-bottom: 2px solid transparent;
    transition: all var(--transition);
}
header nav a:hover {
    color: #fff;
    border-bottom-color: var(--primary);
}

/* ========================================
   页脚
   ======================================== */
footer {
    background: var(--secondary);
    color: var(--gray-400);
    text-align: center;
    padding: 24px 0;
    margin-top: 40px;
    font-size: 14px;
}

/* ========================================
   统计条
   ======================================== */
.stats-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 16px 30px;
    background: #fff;
    padding: 16px 24px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin-bottom: 32px;
    border: 1px solid var(--gray-200);
}
.stats-bar span {
    font-size: 15px;
    color: var(--gray-600);
}
.stats-bar span strong {
    color: var(--gray-900);
    font-weight: 600;
}

/* ========================================
   首页漫画网格
   ======================================== */
.comic-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 24px;
    margin-bottom: 32px;
}
.comic-card {
    background: #fff;
    border-radius: var(--radius);
    padding: 20px 16px 18px;
    box-shadow: var(--shadow);
    border: 1px solid var(--gray-200);
    transition: all var(--transition);
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    overflow: hidden; /* 防止内容溢出 */
}
.comic-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}
.cover-placeholder {
    width: 100%;
    aspect-ratio: 3/4;
    background: var(--gray-200);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 56px;
    color: var(--gray-400);
    margin-bottom: 12px;
}
.comic-card h3 {
    font-size: 18px;
    font-weight: 600;
    margin: 8px 0 4px;
}
.comic-card h3 a {
    color: var(--gray-900);
}
.comic-card h3 a:hover {
    color: var(--primary);
}
.comic-card .desc {
    font-size: 14px;
    color: var(--gray-500);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 10px;
    flex: 1;
}
.comic-card .meta {
    font-size: 13px;
    color: var(--gray-400);
    display: flex;
    gap: 16px;
    margin-bottom: 12px;
}
.btn-small {
    display: inline-block;
    padding: 6px 18px;
    background: var(--primary);
    color: #fff;
    border-radius: 6px;
    font-size: 14px;
    transition: background var(--transition);
}
.btn-small:hover {
    background: var(--primary-dark);
    color: #fff;
}

/* ========================================
   分页
   ======================================== */
.pagination {
    display: flex;
    justify-content: center;
    gap: 6px;
    margin: 20px 0 10px;
}
.pagination a,
.pagination .current {
    display: inline-block;
    padding: 6px 14px;
    border: 1px solid var(--gray-300);
    border-radius: 6px;
    background: #fff;
    color: var(--gray-700);
    font-size: 14px;
    transition: all var(--transition);
}
.pagination a:hover {
    background: var(--gray-100);
}
.pagination .current {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

/* ========================================
   漫画详情页
   ======================================== */
.comic-detail {
    background: #fff;
    border-radius: var(--radius);
    padding: 24px 28px;
    box-shadow: var(--shadow);
    border: 1px solid var(--gray-200);
}
.comic-header {
    display: flex;
    gap: 30px;
    flex-wrap: wrap;
    margin-bottom: 28px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--gray-200);
}
.cover-wrapper {
    flex: 0 0 180px;
}
.cover-big {
    width: 100%;
    aspect-ratio: 3/4;
    object-fit: cover;
    border-radius: 8px;
    background: var(--gray-200);
}
.cover-placeholder-big {
    width: 100%;
    aspect-ratio: 3/4;
    background: var(--gray-200);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 72px;
    color: var(--gray-400);
}
.comic-info {
    flex: 1;
    min-width: 200px;
}
.comic-info h2 {
    font-size: 28px;
    font-weight: 700;
    margin-bottom: 8px;
}
.comic-info .desc {
    font-size: 16px;
    color: var(--gray-600);
    margin-bottom: 8px;
}
.comic-info .keywords {
    font-size: 14px;
    color: var(--primary);
    margin-bottom: 10px;
}
.comic-info .meta {
    display: flex;
    flex-wrap: wrap;
    gap: 16px 24px;
    font-size: 14px;
    color: var(--gray-500);
}

/* 区块 */
.section {
    margin-top: 28px;
}
.section h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 14px;
    color: var(--gray-800);
    border-left: 4px solid var(--primary);
    padding-left: 12px;
}

.word-list {
    display: flex;
    flex-wrap: wrap;
    gap: 8px 12px;
}
.word-tag {
    background: var(--primary-light);
    color: var(--primary-dark);
    padding: 4px 16px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 500;
    border: 1px solid rgba(37, 99, 235, 0.2);
}

.page-list .page-item {
    padding: 14px 0;
    border-bottom: 1px solid var(--gray-200);
}
.page-list .page-item:last-child {
    border-bottom: none;
}
.page-item h4 {
    font-size: 17px;
    font-weight: 500;
}
.page-item h4 a {
    color: var(--gray-900);
}
.page-item h4 a:hover {
    color: var(--primary);
}
.page-item .page-word {
    font-size: 14px;
    color: var(--gray-500);
    margin: 2px 0 4px;
}
.page-item .page-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 12px 20px;
    font-size: 13px;
    color: var(--gray-400);
}

/* ========================================
   SEO落地页
   ======================================== */
.seo-page {
    background: #fff;
    border-radius: var(--radius);
    padding: 28px 32px;
    box-shadow: var(--shadow);
    border: 1px solid var(--gray-200);
}
.breadcrumb {
    font-size: 14px;
    color: var(--gray-500);
    margin-bottom: 16px;
}
.breadcrumb a {
    color: var(--primary);
}
.breadcrumb a:hover {
    text-decoration: underline;
}
.page-title {
    font-size: 32px;
    font-weight: 700;
    margin-bottom: 10px;
    line-height: 1.3;
}
.page-meta-info {
    display: flex;
    flex-wrap: wrap;
    gap: 16px 24px;
    font-size: 14px;
    color: var(--gray-500);
    margin-bottom: 24px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--gray-200);
}
.page-content {
    font-size: 17px;
    line-height: 1.8;
    color: var(--gray-700);
    padding: 16px 0 24px;
    border-bottom: 1px solid var(--gray-200);
}
.page-footer {
    margin-top: 20px;
    font-size: 14px;
    color: var(--gray-500);
}
.related-pages {
    margin-top: 28px;
    padding-top: 20px;
    border-top: 1px solid var(--gray-200);
}
.related-pages h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 10px;
}
.related-pages ul {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 8px 20px;
}
.related-pages ul li a {
    color: var(--primary);
}
.related-pages ul li a:hover {
    text-decoration: underline;
}

/* ========================================
   后台管理（通用样式）
   ======================================== */
.admin-wrap {
    display: flex;
    min-height: 100vh;
    background: var(--gray-50);
}
.admin-sidebar {
    width: 220px;
    background: var(--secondary);
    padding: 24px 16px;
    flex-shrink: 0;
    min-height: 100vh;
    position: sticky;
    top: 0;
    height: 100vh;
    overflow-y: auto;
}
.admin-sidebar h3 {
    color: #fff;
    font-size: 18px;
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}
.admin-sidebar a {
    display: block;
    color: rgba(255,255,255,0.7);
    padding: 10px 12px;
    border-radius: 8px;
    margin-bottom: 4px;
    font-size: 15px;
    transition: all var(--transition);
}
.admin-sidebar a:hover,
.admin-sidebar a.active {
    background: rgba(255,255,255,0.1);
    color: #fff;
}
.admin-sidebar a.logout {
    color: #f87171;
    margin-top: 24px;
}
.admin-sidebar a.logout:hover {
    background: rgba(248, 113, 113, 0.15);
}

.admin-content {
    flex: 1;
    padding: 28px 32px;
    max-width: calc(100% - 220px);
}

/* 后台统计卡片 */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 16px;
    margin-bottom: 28px;
}
.stat-card {
    background: #fff;
    padding: 18px 16px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--gray-200);
    text-align: center;
}
.stat-card .num {
    font-size: 28px;
    font-weight: 700;
    color: var(--primary);
}
.stat-card .label {
    font-size: 14px;
    color: var(--gray-500);
    margin-top: 4px;
}

/* 后台表格 */
.table-wrap {
    overflow-x: auto;
}
.table {
    width: 100%;
    background: #fff;
    border-radius: var(--radius);
    border-collapse: collapse;
    overflow: hidden;
    box-shadow: var(--shadow);
}
.table th {
    background: var(--gray-100);
    padding: 12px 16px;
    text-align: left;
    font-weight: 600;
    font-size: 14px;
}
.table td {
    padding: 12px 16px;
    border-top: 1px solid var(--gray-200);
    font-size: 14px;
    vertical-align: middle;
}
.table tr:hover td {
    background: var(--gray-50);
}

/* 后台表单 */
.admin-form {
    background: #fff;
    padding: 24px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--gray-200);
    margin-bottom: 24px;
}
.admin-form .form-group {
    margin-bottom: 16px;
}
.admin-form label {
    display: block;
    font-weight: 600;
    margin-bottom: 4px;
    font-size: 14px;
}
.admin-form input[type="text"],
.admin-form input[type="password"],
.admin-form textarea,
.admin-form select {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--gray-300);
    border-radius: 6px;
    font-size: 15px;
    transition: border var(--transition);
}
.admin-form input:focus,
.admin-form textarea:focus,
.admin-form select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}
.admin-form textarea {
    min-height: 80px;
    resize: vertical;
}
.admin-form .form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

/* 后台按钮 */
.btn {
    display: inline-block;
    padding: 8px 20px;
    background: var(--primary);
    color: #fff;
    border: none;
    border-radius: 6px;
    font-size: 15px;
    cursor: pointer;
    transition: background var(--transition);
    text-decoration: none;
}
.btn:hover {
    background: var(--primary-dark);
    color: #fff;
}
.btn-success {
    background: #16a34a;
}
.btn-success:hover {
    background: #15803d;
}
.btn-danger {
    background: #dc2626;
}
.btn-danger:hover {
    background: #b91c1c;
}
.btn-warning {
    background: #f59e0b;
    color: #1e293b;
}
.btn-warning:hover {
    background: #d97706;
}
.btn-sm {
    padding: 4px 12px;
    font-size: 13px;
}
.btn-block {
    width: 100%;
    text-align: center;
}

/* 后台顶部操作栏 */
.top-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 24px;
}
.top-bar h2 {
    font-size: 26px;
    font-weight: 700;
}
.top-bar .actions {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

/* 标签 */
.tag {
    display: inline-block;
    padding: 2px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}
.tag-success {
    background: #dcfce7;
    color: #166534;
}
.tag-warning {
    background: #fef3c7;
    color: #92400e;
}
.tag-danger {
    background: #fee2e2;
    color: #991b1b;
}

/* 登录页 */
.login-box {
    max-width: 400px;
    margin: 80px auto;
    background: #fff;
    padding: 32px 36px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    border: 1px solid var(--gray-200);
}
.login-box h2 {
    text-align: center;
    margin-bottom: 20px;
    font-weight: 700;
}
.login-box .error {
    color: #dc2626;
    text-align: center;
    margin-bottom: 12px;
}
.login-box .form-group {
    margin-bottom: 16px;
}
.login-box .btn {
    width: 100%;
    padding: 12px;
}
.login-box .hint {
    text-align: center;
    color: var(--gray-400);
    font-size: 13px;
    margin-top: 16px;
}

/* ========================================
   首页封面统一尺寸（修正版）
   ======================================== */
.comic-card .cover-img {
    width: 100%;
    max-width: 100%;
    height: auto;
    aspect-ratio: 3 / 4;
    object-fit: cover;
    border-radius: 8px;
    background: var(--gray-200);
    display: block;
}

.comic-card .author {
    font-size: 14px;
    color: var(--gray-600);
    margin: 4px 0 6px;
}

.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 60px 20px;
    color: var(--gray-500);
}
.empty-state .btn {
    margin-top: 16px;
}

/* ========================================
   响应式适配
   ======================================== */
/* 平板及以下 */
@media (max-width: 768px) {
    .container {
        padding: 0 16px;
    }
    header .container {
        flex-direction: column;
        align-items: stretch;
        text-align: center;
    }
    header nav {
        justify-content: center;
    }
    .comic-grid {
        grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
        gap: 16px;
    }
    .comic-header {
        flex-direction: column;
        align-items: center;
        text-align: center;
    }
    .cover-wrapper {
        flex: 0 0 auto;
        width: 160px;
    }
    .comic-info h2 {
        font-size: 24px;
    }
    .comic-info .meta {
        justify-content: center;
    }
    .page-title {
        font-size: 26px;
    }
    .seo-page {
        padding: 20px;
    }
    .admin-sidebar {
        width: 60px;
        padding: 16px 8px;
    }
    .admin-sidebar h3 {
        display: none;
    }
    .admin-sidebar a {
        font-size: 12px;
        padding: 8px 4px;
        text-align: center;
        word-break: break-all;
    }
    .admin-content {
        padding: 16px;
        max-width: calc(100% - 60px);
    }
    .stats-grid {
        grid-template-columns: repeat(3, 1fr);
    }
    .admin-form .form-row {
        grid-template-columns: 1fr;
    }
    .top-bar {
        flex-direction: column;
        align-items: stretch;
    }
    .top-bar .actions {
        justify-content: stretch;
    }
    .top-bar .actions .btn {
        flex: 1;
        text-align: center;
    }
}

/* 手机小屏 */
@media (max-width: 480px) {
    .comic-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }
    .comic-card {
        padding: 12px 8px;
    }
    .cover-placeholder {
        aspect-ratio: 3/4;
        font-size: 36px;
    }
    .comic-card h3 {
        font-size: 15px;
    }
    .comic-card .desc {
        font-size: 12px;
        -webkit-line-clamp: 1;
    }
    .comic-card .meta {
        font-size: 11px;
        gap: 8px;
    }
    .btn-small {
        font-size: 12px;
        padding: 4px 14px;
    }
    .stats-bar {
        padding: 12px 16px;
        gap: 6px 16px;
    }
    .stats-bar span {
        font-size: 13px;
    }
    .comic-detail {
        padding: 16px;
    }
    .cover-wrapper {
        width: 120px;
    }
    .comic-info h2 {
        font-size: 20px;
    }
    .page-title {
        font-size: 22px;
    }
    .page-content {
        font-size: 15px;
    }
    .admin-sidebar {
        width: 48px;
        padding: 12px 4px;
    }
    .admin-sidebar a {
        font-size: 10px;
        padding: 6px 2px;
    }
    .admin-content {
        padding: 12px;
        max-width: calc(100% - 48px);
    }
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .stat-card .num {
        font-size: 22px;
    }
    .table th, .table td {
        padding: 8px 10px;
        font-size: 12px;
    }
    .login-box {
        margin: 40px 16px;
        padding: 24px 20px;
    }
    .admin-form {
        padding: 16px;
    }
}