/* ============================================
   雨老爹Blog - 前台公共样式
   主色: #667eea  辅助色: #764ba2
   ============================================ */

/* ---------- CSS Variables ---------- */
:root {
    --primary: #667eea;
    --primary-dark: #5a6fd6;
    --secondary: #764ba2;
    --gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-hover: linear-gradient(135deg, #5a6fd6 0%, #6a3f91 100%);
    --text-primary: #2d3748;
    --text-secondary: #718096;
    --text-light: #a0aec0;
    --bg-white: #ffffff;
    --bg-light: #f7fafc;
    --bg-gray: #edf2f7;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 14px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.12);
    --shadow-hover: 0 12px 28px rgba(102, 126, 234, 0.25);
    --radius-sm: 0.375rem;
    --radius-md: 0.625rem;
    --radius-lg: 1rem;
    --radius-full: 9999px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
    --nav-height: 3.75rem;
    --container-width: 75rem;
}

/* ---------- Global Reset ---------- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: var(--font-sans);
    color: var(--text-primary);
    background-color: var(--bg-light);
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    padding-top: var(--nav-height);
    -webkit-tap-highlight-color: transparent;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: var(--transition);
    position: relative;
}

a:hover {
    color: var(--secondary);
}

/* Link underline animation */
a.link-anim {
    display: inline-block;
}

a.link-anim::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient);
    transition: width 0.3s ease;
    border-radius: var(--radius-full);
}

a.link-anim:hover::after {
    width: 100%;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

ul, ol {
    list-style: none;
}

/* ---------- Container ---------- */
.container {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 1rem;
}

/* ---------- Navigation ---------- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: var(--bg-white);
    z-index: 1000;
    transition: var(--transition);
    border-bottom: 1px solid transparent;
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
    border-bottom: 1px solid var(--border-color);
}

.navbar .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.02em;
}

.navbar-brand:hover {
    -webkit-text-fill-color: transparent;
    opacity: 0.85;
}

.navbar-menu {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.navbar-menu a {
    display: inline-block;
    padding: 0.5rem 0.875rem;
    color: var(--text-primary);
    font-size: 0.9375rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.navbar-menu a:hover,
.navbar-menu a.active {
    color: var(--primary);
    background: rgba(102, 126, 234, 0.08);
}

.navbar-menu a.active {
    font-weight: 600;
}

/* 外链图标 */
.ext-link-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    vertical-align: middle;
    margin-left: 5px;
    width: 14px;
    height: 14px;
    stroke: currentColor;
    opacity: 0.65;
    transition: opacity 0.2s, transform 0.2s;
    pointer-events: auto;
    cursor: pointer;
}
.ext-link-icon * {
    pointer-events: none;
}
.navbar-menu a:hover .ext-link-icon {
    opacity: 1;
    transform: translate(1px, -1px);
}

/* 下拉菜单 */
.nav-dropdown {
    position: relative;
    display: inline-block;
}

.nav-dropdown > a {
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.dropdown-arrow {
    font-size: 0.6rem;
    transition: transform 0.3s;
}

.nav-dropdown:hover .dropdown-arrow {
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: #fff;
    box-shadow: 0 8px 20px rgba(0,0,0,0.12);
    border-radius: var(--radius-md);
    padding: 0.5rem 0;
    min-width: 0;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s ease;
    z-index: 1000;
}

.nav-dropdown:hover .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-menu a {
    display: block;
    padding: 0.6rem 1.25rem;
    font-size: 0.9rem;
    white-space: nowrap;
    border-radius: 0;
}

.dropdown-menu {
    min-width: 0;
}

.dropdown-menu a:hover {
    background: rgba(102, 126, 234, 0.08);
}

/* 登录按钮和状态 */
.login-link {
    color: var(--primary) !important;
    font-weight: 600 !important;
    border: 1.5px solid var(--primary) !important;
    border-radius: var(--radius-full) !important;
    padding: 0.35rem 1rem !important;
    font-size: 0.85rem !important;
    transition: var(--transition);
}
.login-link:hover {
    background: var(--primary) !important;
    color: #fff !important;
}
.login-status {
    font-size: 0.8rem;
    color: var(--text-secondary);
    padding: 0.3rem 0.8rem;
    background: rgba(102, 126, 234, 0.06);
    border-radius: var(--radius-full);
    font-weight: 500;
}

/* Hamburger */
.navbar-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 5px;
    width: 2rem;
    height: 2rem;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.25rem;
    z-index: 1001;
}

.navbar-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--text-primary);
    border-radius: var(--radius-full);
    transition: var(--transition);
}

.navbar-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.navbar-toggle.active span:nth-child(2) {
    opacity: 0;
}

.navbar-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ---------- Hero Carousel ---------- */
.hero-carousel {
    position: relative;
    width: 100%;
    max-width: calc(var(--container-width) - 2rem);
    margin: 1.5rem auto;
    overflow: hidden;
    border-radius: var(--radius-lg);
    background: var(--text-primary);
}

/* 移动端搜索框 */
.mobile-search {
    display: none;
}

@media (max-width: 768px) {
    .mobile-search {
        display: block;
        padding: 1.5rem 1rem;
        max-width: 100%;
    }
    .mobile-search .search-form {
        max-width: 100%;
    }
    .mobile-search .search-form input {
        padding: 0.875rem 1rem;
        font-size: 1rem;
    }
    .mobile-search .search-form button {
        padding: 0.875rem 1.25rem;
        font-size: 1rem;
    }
}

.carousel-track {
    display: flex;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.carousel-slide {
    min-width: 100%;
    position: relative;
}

/* 轮播图基础样式 */
.carousel-slide img {
    width: 100%;
    height: 28rem;
    object-fit: cover;
    display: block;
}

/* PC/移动端图片切换逻辑 */
.mobile-only {
    display: block;
}
.pc-only {
    display: none;
}

/* 移动端适配 */
@media (max-width: 768px) {
    .hero-carousel {
        max-width: 100%;
        margin: 0;
        border-radius: 0;
    }
    .hero-carousel img {
        height: 14rem;
    }
}

/* PC端适配 */
@media (min-width: 769px) {
    .mobile-only {
        display: none !important;
    }
    .pc-only {
        display: block !important;
    }
}

.carousel-caption {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 3rem 2rem 2rem;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.7));
    color: #fff;
}

.carousel-caption h2 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.carousel-caption p {
    font-size: 1rem;
    opacity: 0.9;
    max-width: 40rem;
}

/* Carousel Controls */
.carousel-btn {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 2.75rem;
    height: 2.75rem;
    background: rgba(255, 255, 255, 0.85);
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.125rem;
    color: var(--text-primary);
    transition: var(--transition);
    box-shadow: var(--shadow-md);
    z-index: 10;
}

.carousel-btn:hover {
    background: #fff;
    box-shadow: var(--shadow-lg);
    transform: translateY(-50%) scale(1.08);
}

.carousel-btn-prev {
    left: 1rem;
}

.carousel-btn-next {
    right: 1rem;
}

/* Carousel Indicators */
.carousel-indicators {
    display: none;
}

.carousel-indicators button {
    width: 0.625rem;
    height: 0.625rem;
    border-radius: var(--radius-full);
    border: 2px solid #fff;
    background: transparent;
    cursor: pointer;
    transition: var(--transition);
    padding: 0;
}

.carousel-indicators button.active {
    background: #fff;
    width: 1.75rem;
    border-radius: var(--radius-full);
}

/* ---------- Main Layout ---------- */
.main-content {
    display: grid;
    grid-template-columns: 1fr 20rem;
    gap: 2rem;
    padding: 0;
}

/* 首页搜索框上下间距优化 */
.sidebar .sidebar-widget:first-child {
    margin-top: 0;
}

/* ---------- Article Cards ---------- */
.articles-grid {
    display: grid;
    gap: 1.5rem;
}

.article-card {
    background: var(--bg-white);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    display: grid;
    grid-template-columns: 16rem 1fr;
    position: relative; /* 为全区域点击提供定位上下文 */
}

/* 全区域点击跳转核心逻辑 */
.article-card-title a {
    position: relative;
    z-index: 2;
}
.article-card-title a::after {
    content: '';
    position: absolute;
    inset: 0;
    z-index: 1;
}
.article-card-cover a {
    position: relative;
    z-index: 3; /* 封面链接优先级最高 */
}

/* 卡片全区域点击透明遮罩层 */
.card-full-link {
    position: absolute;
    inset: 0;
    z-index: 1;
    background: transparent;
    text-indent: -9999px;
    overflow: hidden;
}

.article-card-cover {
    position: relative;
    width: 100%;
    height: 100%;
    min-height: 12rem;
    overflow: hidden;
    background: var(--bg-gray);
    aspect-ratio: 16 / 9;
}

.article-card-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
    display: block;
}

.article-card:hover .article-card-cover img {
    transform: scale(1.05);
}

.article-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-0.25rem);
}

/* ===== 多模型样式 ===== */
/* 模型角标 */
.model-badge {
    position: absolute;
    top: 10px;
    right: 10px;
    background: rgba(0, 0, 0, 0.6);
    color: #fff;
    font-size: 0.75rem;
    padding: 4px 8px;
    border-radius: 4px;
    backdrop-filter: blur(4px);
    z-index: 2;
    pointer-events: none;
}
.model-badge-gallery { background: rgba(102, 126, 234, 0.85); }
.model-badge-video { background: rgba(231, 76, 60, 0.85); }

/* 视频播放按钮 */
.video-play-icon {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 56px;
    height: 56px;
    background: rgba(0, 0, 0, 0.65);
    border-radius: 50%;
    color: #fff;
    display: flex;
    align-items: center;
    justify-content: center;
    backdrop-filter: blur(6px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    pointer-events: none;
    box-shadow: 0 4px 12px rgba(0,0,0,0.3);
}
.video-play-icon svg {
    width: 26px;
    height: 26px;
    margin-left: 3px; /* 视觉修正居中 */
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.3));
}
.article-card:hover .video-play-icon {
    background: var(--primary-color, #667eea);
    transform: translate(-50%, -50%) scale(1.15);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.5);
}

.article-card-body {
    padding: 1.25rem 1.5rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.article-card-meta {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
    font-size: 0.8125rem;
    color: var(--text-light);
}

.article-card-category {
    display: inline-block;
    padding: 0.125rem 0.625rem;
    background: rgba(102, 126, 234, 0.1);
    color: var(--primary);
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 0.75rem;
}

.article-card-title {
    font-size: 1.125rem;
    font-weight: 700;
    line-height: 1.5;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.article-card-title a {
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.article-card-title a:hover {
    color: var(--primary);
}

.top-badge {
    background: linear-gradient(135deg, #f59e0b, #ef4444);
    color: #fff;
    padding: 0.15rem 0.5rem;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 600;
    white-space: nowrap;
    display: inline-flex;
    align-items: center;
    line-height: 1.3;
    flex-shrink: 0;
    vertical-align: middle;
}

.article-card-excerpt {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.7;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-card-footer {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-top: auto;
    padding-top: 0.75rem;
    font-size: 0.8125rem;
    color: var(--text-light);
}

.article-card-footer svg {
    width: 0.875rem;
    height: 0.875rem;
    margin-right: 0.25rem;
    vertical-align: -0.0625rem;
}

/* ---------- Sidebar ---------- */
.sidebar {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.sidebar-widget {
    background: var(--bg-white);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    box-shadow: var(--shadow-sm);
}

.sidebar-widget-title {
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
    padding-bottom: 0.625rem;
    border-bottom: 2px solid var(--border-color);
    position: relative;
}

.sidebar-widget-title::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 2.5rem;
    height: 2px;
    background: var(--gradient);
    border-radius: var(--radius-full);
}

/* Search */
.search-form {
    display: flex;
    gap: 0;
}

.search-form input {
    flex: 1;
    padding: 0.625rem 0.875rem;
    border: 1px solid var(--border-color);
    border-right: none;
    border-radius: var(--radius-sm) 0 0 var(--radius-sm);
    font-size: 0.875rem;
    outline: none;
    transition: var(--transition);
    font-family: var(--font-sans);
}

.search-form input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.15);
}

.search-form button {
    padding: 0.625rem 1rem;
    background: var(--gradient);
    color: #fff;
    border: none;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    cursor: pointer;
    font-size: 0.875rem;
    font-weight: 600;
    transition: var(--transition);
    white-space: nowrap;
}

.search-form button:hover {
    background: var(--gradient-hover);
    box-shadow: var(--shadow-md);
}

/* Category List */
.category-list li {
    margin-bottom: 0.25rem;
}

.category-list a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.5rem 0.75rem;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    transition: var(--transition);
}

.category-list a:hover {
    background: rgba(102, 126, 234, 0.08);
    color: var(--primary);
}

.category-list .count {
    background: var(--bg-gray);
    color: var(--text-light);
    padding: 0.125rem 0.5rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    justify-content: center;
}

/* 单文章模型分类图标样式 */
.category-list .count.single-article-icon {
    background: rgba(102, 126, 234, 0.1);
    color: var(--primary);
    padding: 0.25rem;
    border-radius: var(--radius-sm);
}

.category-list .count.single-article-icon svg {
    width: 14px;
    height: 14px;
}

.category-list a:hover .count {
    background: rgba(102, 126, 234, 0.15);
    color: var(--primary);
}

/* 树形分类层级样式 */
.category-list {
    list-style: none;
    padding: 0;
    margin: 0;
}
.category-list .cat-item {
    margin-bottom: 4px;
}
.category-list .cat-parent > a {
    font-weight: 600;
    color: var(--text-main);
}
.category-list .cat-parent.active > a {
    background: rgba(102, 126, 234, 0.1);
    color: var(--primary);
}
.category-list .sub-cat-list {
    list-style: none;
    padding: 6px 0 2px 16px;
    margin: 0;
    border-left: 2px solid rgba(102, 126, 234, 0.15);
}
.category-list .cat-child a {
    font-size: 0.85rem;
    color: var(--text-secondary);
    padding: 0.4rem 0.6rem;
    font-weight: 400;
}
.category-list .cat-child a:hover {
    background: rgba(102, 126, 234, 0.05);
    color: var(--primary);
}
.category-list .cat-child.active a {
    background: rgba(102, 126, 234, 0.1);
    color: var(--primary);
    font-weight: 500;
}

/* 分类外部跳转图标样式 */
.cat-ext-icon {
    margin-left: 6px;
    opacity: 0.6;
    transition: opacity 0.2s;
    vertical-align: middle;
    flex-shrink: 0;
}
.category-list a:hover .cat-ext-icon {
    opacity: 1;
    color: var(--primary);
}

/* Tag Cloud */
.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 0.375rem;
}

.tag-cloud a {
    display: inline-block;
    padding: 0.25rem 0.625rem;
    background: var(--bg-light);
    color: var(--text-secondary);
    border-radius: var(--radius-full);
    font-size: 0.8125rem;
    transition: var(--transition);
    border: 1px solid transparent;
}

.tag-cloud a:hover {
    background: rgba(102, 126, 234, 0.1);
    color: var(--primary);
    border-color: rgba(102, 126, 234, 0.2);
}

/* Archive List */
.archive-list li {
    margin-bottom: 0.25rem;
}

.archive-list a {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.5rem 0.75rem;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    transition: var(--transition);
}

.archive-list a:hover {
    background: rgba(102, 126, 234, 0.08);
    color: var(--primary);
}

/* Recent Posts */
.recent-posts li {
    padding: 0.625rem 0;
    border-bottom: 1px solid var(--bg-gray);
}

.recent-posts li:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.recent-posts a {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.5;
    display: block;
    transition: var(--transition);
}

.recent-posts a:hover {
    color: var(--primary);
}

.recent-posts .post-date {
    font-size: 0.75rem;
    color: var(--text-light);
    margin-top: 0.125rem;
}

/* Link List */
.link-list li {
    margin-bottom: 0.25rem;
}

.link-list a {
    display: block;
    padding: 0.375rem 0.75rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
    border-radius: var(--radius-sm);
    transition: var(--transition);
}

.link-list a:hover {
    background: rgba(102, 126, 234, 0.08);
    color: var(--primary);
}

/* ---------- Pagination ---------- */
.pagination {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.375rem;
    margin-top: 2rem;
    padding: 1rem 0;
}

.pagination a,
.pagination span {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-width: 2.25rem;
    height: 2.25rem;
    padding: 0 0.5rem;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
    transition: var(--transition);
}

.pagination a {
    color: var(--text-secondary);
    background: var(--bg-white);
    border: 1px solid var(--border-color);
}

.pagination a:hover {
    color: var(--primary);
    border-color: var(--primary);
    background: rgba(102, 126, 234, 0.05);
}

.pagination .active {
    background: var(--gradient);
    color: #fff;
    border: 1px solid transparent;
    box-shadow: var(--shadow-sm);
}

.pagination .disabled {
    opacity: 0.5;
    pointer-events: none;
}

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.625rem 1.5rem;
    border-radius: var(--radius-sm);
    font-size: 0.9375rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    text-decoration: none;
    gap: 0.5rem;
}

.btn-primary {
    background: var(--gradient);
    color: #fff;
    box-shadow: 0 4px 14px rgba(102, 126, 234, 0.35);
}

.btn-primary:hover {
    background: var(--gradient-hover);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.45);
    transform: translateY(-1px);
    color: #fff;
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 1px solid var(--primary);
}

.btn-outline:hover {
    background: var(--primary);
    color: #fff;
}

.btn-sm {
    padding: 0.375rem 1rem;
    font-size: 0.8125rem;
}

.btn-lg {
    padding: 0.875rem 2rem;
    font-size: 1.0625rem;
}

/* ---------- Breadcrumb ---------- */
.breadcrumb {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 0;
    font-size: 0.875rem;
    color: var(--text-light);
    flex-wrap: wrap;
}

.breadcrumb a {
    color: var(--text-secondary);
}

.breadcrumb a:hover {
    color: var(--primary);
}

.breadcrumb .separator {
    color: var(--text-light);
}

.breadcrumb .current {
    color: var(--text-primary);
    font-weight: 600;
}

/* ---------- Article Detail ---------- */
.article-detail {
    background: var(--bg-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    padding: 2.5rem;
    margin-bottom: 2rem;
}

.article-detail-header {
    margin-bottom: 2rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}

.article-detail-title {
    font-size: 2rem;
    font-weight: 800;
    line-height: 1.4;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.article-detail-meta {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    flex-wrap: wrap;
    font-size: 0.875rem;
    color: var(--text-light);
}

.article-detail-meta span {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
}

.article-detail-content {
    font-size: 1rem;
    line-height: 1.85;
    color: var(--text-primary);
}

.article-detail-content p {
    margin-bottom: 1.25rem;
}

.article-detail-content h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 2rem 0 1rem;
    color: var(--text-primary);
}

.article-detail-content h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin: 1.5rem 0 0.75rem;
}

.article-detail-content img {
    border-radius: var(--radius-md);
    margin: 1.5rem 0;
    cursor: pointer;
    transition: opacity 0.2s;
}
.article-detail-content img:hover {
    opacity: 0.85;
}

/* 大图查看器 */
.image-viewer-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.9);
    z-index: 99999;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    cursor: zoom-out;
}
.image-viewer-overlay.active {
    display: flex;
}
.image-viewer-overlay .viewer-img {
    max-width: 90vw;
    max-height: 85vh;
    object-fit: contain;
    border-radius: 4px;
    transition: transform 0.3s ease;
    cursor: zoom-in;
}
.image-viewer-overlay .viewer-img.zoomed {
    transform: scale(2);
    cursor: zoom-out;
}
.image-viewer-close {
    position: absolute;
    top: 1.5rem;
    right: 1.5rem;
    width: 2.5rem;
    height: 2.5rem;
    background: rgba(255,255,255,0.15);
    border: none;
    border-radius: 50%;
    color: #fff;
    font-size: 1.5rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
    z-index: 100000;
}
.image-viewer-close:hover {
    background: rgba(255,255,255,0.3);
}
.image-viewer-hint {
    color: rgba(255,255,255,0.6);
    font-size: 0.85rem;
    margin-top: 1rem;
    text-align: center;
}

.article-detail-content pre {
    background: #1a202c;
    color: #e2e8f0;
    padding: 1.25rem;
    border-radius: var(--radius-md);
    overflow-x: auto;
    margin: 1.5rem 0;
    font-size: 0.875rem;
    line-height: 1.7;
}

.article-detail-content code {
    background: var(--bg-gray);
    padding: 0.125rem 0.375rem;
    border-radius: var(--radius-sm);
    font-size: 0.875em;
    color: var(--secondary);
}

.article-detail-content pre code {
    background: none;
    padding: 0;
    color: inherit;
}

.article-detail-content blockquote {
    border-left: 4px solid var(--primary);
    padding: 1rem 1.25rem;
    margin: 1.5rem 0;
    background: rgba(102, 126, 234, 0.04);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    color: var(--text-secondary);
}

.article-detail-content ul,
.article-detail-content ol {
    padding-left: 1.5rem;
    margin-bottom: 1.25rem;
}

.article-detail-content li {
    margin-bottom: 0.375rem;
}

.article-detail-content a {
    color: var(--primary);
    text-decoration: underline;
    text-decoration-color: rgba(102, 126, 234, 0.3);
    text-underline-offset: 0.2em;
}

.article-detail-content a:hover {
    text-decoration-color: var(--primary);
}

.article-detail-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 1.5rem 0;
}

.article-detail-content th,
.article-detail-content td {
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    text-align: left;
}

.article-detail-content th {
    background: var(--bg-light);
    font-weight: 600;
}

/* Article Tags */
.article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
}

.article-tags a {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--bg-light);
    color: var(--text-secondary);
    border-radius: var(--radius-full);
    font-size: 0.8125rem;
    transition: var(--transition);
}

.article-tags a:hover {
    background: rgba(102, 126, 234, 0.1);
    color: var(--primary);
}

/* Prev/Next Nav */
.article-nav {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.article-nav-item {
    background: var(--bg-white);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.article-nav-item:hover {
    box-shadow: var(--shadow-md);
}

.article-nav-item.next {
    text-align: right;
}

.article-nav-label {
    font-size: 0.8125rem;
    color: var(--text-light);
    margin-bottom: 0.375rem;
}

.article-nav-title {
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.5;
}

.article-nav-item:hover .article-nav-title {
    color: var(--primary);
}

/* ---------- Search Results ---------- */
.search-header {
    background: var(--bg-white);
    border-radius: var(--radius-md);
    padding: 1.5rem 2rem;
    box-shadow: var(--shadow-sm);
    margin-bottom: 1.5rem;
}

.search-header h2 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
}

.search-header .result-count {
    font-size: 0.875rem;
    color: var(--text-light);
    margin-top: 0.25rem;
}

.search-keyword {
    color: var(--primary);
    font-weight: 700;
}

/* ---------- Archive Timeline ---------- */
.archive-timeline {
    position: relative;
    padding-left: 2rem;
}

.archive-timeline::before {
    content: '';
    position: absolute;
    left: 0.5rem;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--border-color);
}

.archive-month {
    position: relative;
    margin-bottom: 2rem;
}

.archive-month::before {
    content: '';
    position: absolute;
    left: -1.75rem;
    top: 0.5rem;
    width: 0.75rem;
    height: 0.75rem;
    background: var(--gradient);
    border-radius: var(--radius-full);
    border: 3px solid var(--bg-white);
    box-shadow: 0 0 0 2px var(--primary);
}

.archive-month-header {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-color);
}

.archive-month-header .article-count {
    font-size: 0.875rem;
    color: var(--text-light);
    font-weight: 400;
    margin-left: 0.5rem;
}

.archive-item {
    display: flex;
    align-items: baseline;
    gap: 1rem;
    padding: 0.5rem 0;
}

.archive-item-date {
    font-size: 0.8125rem;
    color: var(--text-light);
    min-width: 5rem;
    flex-shrink: 0;
}

.archive-item a {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    font-weight: 500;
    transition: var(--transition);
}

.archive-item a:hover {
    color: var(--primary);
}

/* ---------- 404 Page ---------- */
.error-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 70vh;
    text-align: center;
    padding: 2rem;
}

.error-content {
    max-width: 30rem;
}

.error-code {
    font-size: 8rem;
    font-weight: 900;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
    margin-bottom: 1rem;
}

.error-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.75rem;
}

.error-desc {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.7;
}

.error-actions {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

/* ---------- Footer ---------- */
.footer {
    background: var(--text-primary);
    color: rgba(255, 255, 255, 0.7);
    padding: 3rem 0 1.5rem;
    margin-top: 3rem;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 2rem;
    margin-bottom: 2rem;
}

.footer-brand {
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.75rem;
}

.footer-desc {
    font-size: 0.875rem;
    line-height: 1.7;
    max-width: 25rem;
}

.footer-title {
    font-size: 1rem;
    font-weight: 700;
    color: #fff;
    margin-bottom: 1rem;
}

.footer-links li {
    margin-bottom: 0.5rem;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.875rem;
    transition: var(--transition);
}

.footer-links a:hover {
    color: #fff;
    padding-left: 0.25rem;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 1.5rem;
    text-align: center;
    font-size: 0.8125rem;
}

.footer-bottom a {
    color: rgba(255, 255, 255, 0.7);
}

.footer-bottom a:hover {
    color: #fff;
}

/* ---------- Back to Top ---------- */
.back-to-top {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 2.75rem;
    height: 2.75rem;
    background: var(--gradient);
    color: #fff;
    border: none;
    border-radius: var(--radius-full);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.125rem;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    opacity: 0;
    visibility: hidden;
    transform: translateY(1rem);
    z-index: 999;
}

.back-to-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

/* ---------- Page Header ---------- */
.page-header {
    background: var(--gradient);
    color: #fff;
    padding: 1.5rem 0;
    text-align: center;
    border-radius: 0 0 var(--radius-lg) var(--radius-lg);
    margin-bottom: 1.5rem;
}

.page-header h1 {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 0.5rem;
}

.page-header p {
    font-size: 1rem;
    opacity: 0.9;
}

/* ---------- No Content ---------- */
.no-content {
    text-align: center;
    padding: 4rem 2rem;
    background: var(--bg-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
}

.no-content-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
    opacity: 0.3;
}

.no-content h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.no-content p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

/* ========== 子分类列表页面样式 ========== */
.subcategories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(18rem, 1fr));
    gap: 1.5rem;
    margin-top: 1.5rem;
}

.subcategory-card {
    background: var(--bg-white);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    position: relative;
    border: 1px solid var(--border-color);
}

.subcategory-card:hover {
    box-shadow: var(--shadow-hover);
    transform: translateY(-0.25rem);
    border-color: rgba(102, 126, 234, 0.3);
}

/* 全区域点击遮罩层 */
.subcategory-card-link {
    position: absolute;
    inset: 0;
    z-index: 1;
    background: transparent;
    text-indent: -9999px;
    overflow: hidden;
}

.subcategory-card-body {
    padding: 1.5rem;
    position: relative;
    z-index: 2;
}

.subcategory-card-title {
    font-size: 1.125rem;
    font-weight: 700;
    line-height: 1.5;
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.subcategory-card-title a {
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.subcategory-card-title a:hover {
    color: var(--primary);
}

.subcategory-card-desc {
    font-size: 0.875rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 1rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    min-height: 2.8rem;
}

.subcategory-card-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.subcategory-count {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    font-size: 0.8125rem;
    color: var(--text-light);
}

.subcategory-count svg {
    width: 0.875rem;
    height: 0.875rem;
}

.ext-link-badge {
    background: rgba(102, 126, 234, 0.1);
    color: var(--primary);
    padding: 0.125rem 0.5rem;
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
}

/* 移动端适配 */
@media (max-width: 768px) {
    .subcategories-grid {
        grid-template-columns: 1fr;
        gap: 1rem;
        padding: 0 1rem;
    }
    
    .subcategory-card {
        border-radius: var(--radius-sm);
    }
    
    .subcategory-card-body {
        padding: 1.25rem;
    }
    
    .subcategory-card-title {
        font-size: 1rem;
    }
    
    .subcategory-card-desc {
        font-size: 0.8125rem;
        min-height: 2.4rem;
    }
}

/* ---------- Misc ---------- */
.text-center { text-align: center; }
.text-right { text-align: right; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

/* ---------- Responsive: Tablet ---------- */
@media (max-width: 1024px) {
    .main-content {
        grid-template-columns: 1fr 17rem;
        gap: 1.5rem;
    }

    .article-card {
        grid-template-columns: 13rem 1fr;
    }

    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
}

/* ---------- Responsive: Mobile ---------- */
@media (max-width: 768px) {
    :root {
        --nav-height: 3.5rem;
    }

    /* Mobile Nav */
    .navbar-toggle {
        display: flex;
    }

    .navbar-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 17.5rem;
        height: 100vh;
        background: var(--bg-white);
        flex-direction: column;
        align-items: stretch;
        padding: 4rem 1.5rem 1.5rem;
        gap: 0;
        box-shadow: var(--shadow-lg);
        transition: right 0.3s ease;
        overflow-y: auto;
        z-index: 1000;
    }

    .navbar-menu.open {
        right: 0;
    }

    .navbar-menu a {
        padding: 0.75rem 1rem;
        border-bottom: 1px solid var(--bg-gray);
        border-radius: 0;
    }

    .navbar-menu a:last-child {
        border-bottom: none;
    }

    /* 移动端下拉菜单 */
    .nav-dropdown .dropdown-menu {
        position: static;
        opacity: 1;
        visibility: visible;
        transform: none;
        box-shadow: none;
        background: rgba(102, 126, 234, 0.04);
        min-width: auto;
        display: none;
        padding: 0;
    }

    .nav-dropdown.active .dropdown-menu {
        display: block;
    }

    .nav-dropdown .dropdown-menu a {
        padding-left: 2rem;
        font-size: 0.85rem;
    }

    .nav-dropdown > a .dropdown-arrow {
        margin-left: auto;
        transition: transform 0.3s;
        display: inline-block !important;
        visibility: visible !important;
        opacity: 1 !important;
        font-size: 0.65rem;
        transform: rotate(0deg) !important; /* 默认朝下 */
    }

    .nav-dropdown.active > a .dropdown-arrow {
        transform: rotate(180deg) !important; /* 展开朝上 */
    }
    
    /* 确保移动端外链图标可见（一级和二级分类） */
    .navbar-menu .ext-link-icon,
    .nav-dropdown-link .ext-link-icon,
    .dropdown-menu a .ext-link-icon {
        display: inline-flex !important;
        visibility: visible !important;
        opacity: 0.7 !important;
        stroke: currentColor !important;
        margin-left: 6px !important;
        width: 14px !important;
        height: 14px !important;
        flex-shrink: 0;
        vertical-align: middle;
    }
    
    .navbar-menu a:hover .ext-link-icon,
    .nav-dropdown-link:hover .ext-link-icon,
    .dropdown-menu a:hover .ext-link-icon {
        opacity: 1 !important;
    }

    /* 移动端登录样式 */
    .login-link {
        margin-top: 0.5rem;
        text-align: center;
        border-radius: var(--radius-md) !important;
    }
    .login-status {
        display: block;
        text-align: center;
        margin-bottom: 0.5rem;
    }

    /* Mobile overlay */
    .nav-overlay {
        display: none;
        position: fixed;
        inset: 0;
        background: rgba(0, 0, 0, 0.4);
        z-index: 999;
    }

    .nav-overlay.active {
        display: block;
    }

    /* Carousel */
    .carousel-slide img {
        height: 14rem;
    }

    .carousel-caption {
        padding: 1.5rem 1rem 1rem;
    }

    .carousel-caption h2 {
        font-size: 1.125rem;
    }

    .carousel-caption p {
        display: none;
    }

    .carousel-btn {
        width: 1.5rem;
        height: 1.5rem;
        font-size: 0.625rem;
        line-height: 1;
        display: flex;
        align-items: center;
        justify-content: center;
    }

    /* Layout */
    .main-content {
        grid-template-columns: 1fr;
        gap: 1.5rem;
        padding: 0;
    }

    /* Article Cards */
    .article-card {
        grid-template-columns: 1fr;
    }

    .article-card-cover {
        height: 13rem;
    }

    .article-card-cover img {
        height: 100%;
    }

    /* Sidebar */
    .sidebar {
        order: 2;
    }

    /* 移动端隐藏侧边栏搜索框（已移至banner下方） */
    .sidebar .sidebar-widget:first-child {
        display: none;
    }

    /* Article Detail */
    .article-detail {
        padding: 1.5rem;
    }

    .article-detail-title {
        font-size: 1.5rem;
    }

    .article-nav {
        grid-template-columns: 1fr;
    }

    /* Footer */
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    /* Page Header */
    .page-header {
        padding: 2rem 1rem;
    }

    .page-header h1 {
        font-size: 1.5rem;
    }

    /* 404 */
    .error-code {
        font-size: 5rem;
    }

    /* Back to top */
    .back-to-top {
        bottom: 1.25rem;
        right: 1.25rem;
        width: 2.5rem;
        height: 2.5rem;
    }

    /* Breadcrumb */
    .breadcrumb {
        font-size: 0.8125rem;
    }
}

/* ---------- Print ---------- */
@media print {
    .navbar, .sidebar, .footer, .back-to-top,
    .carousel-btn, .carousel-indicators, .article-nav {
        display: none !important;
    }

    body {
        padding-top: 0;
    }

    .main-content {
        grid-template-columns: 1fr;
    }

    .article-detail {
        box-shadow: none;
        padding: 0;
    }
}