/* ============================================================
   游戏头条模板 - 样式表
   主色: #18ade5 | 强调: #F4791F | 背景: #f5f5f5
   卡片: #fff | 文字: #333 | 次要: #999
   ============================================================ */

/* --- CSS Variables --- */
:root {
    --color-primary: #18ade5;
    --color-primary-dark: #1495c9;
    --color-primary-light: #e8f7fd;
    --color-accent: #F4791F;
    --color-accent-dark: #e06810;
    --color-bg: #f5f5f5;
    --color-card: #ffffff;
    --color-text: #333333;
    --color-text-light: #666666;
    --color-secondary: #999999;
    --color-border: #e0e0e0;
    --color-border-light: #f0f0f0;
    --radius: 6px;
    --radius-sm: 4px;
    --shadow: 0 2px 8px rgba(0,0,0,0.08);
    --shadow-hover: 0 4px 16px rgba(0,0,0,0.12);
    --transition: 0.25s ease;
    --max-width: 1200px;
    --sidebar-width: 300px;
    --gap: 20px;
}

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

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
                 "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue",
                 Arial, sans-serif;
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.6;
    min-height: 100vh;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition);
}

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

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

ul, ol {
    list-style: none;
}

input, button {
    font-family: inherit;
    font-size: inherit;
    border: none;
    outline: none;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--gap);
}

/* --- Header --- */
.site-header {
    background: var(--color-card);
    box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}

.header-top {
    border-bottom: 1px solid var(--color-border-light);
}

.header-top-inner {
    display: flex;
    align-items: center;
    height: 64px;
    gap: 20px;
}

.site-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
    font-size: 22px;
    font-weight: 700;
    color: var(--color-primary);
}

.site-logo:hover {
    color: var(--color-primary);
}

.logo-icon {
    font-size: 28px;
}

.logo-text {
    white-space: nowrap;
}

.header-search {
    display: flex;
    margin-left: auto;
    max-width: 400px;
    width: 320px;
    height: 36px;
    border: 2px solid var(--color-primary);
    border-radius: var(--radius);
    overflow: hidden;
}

.search-input {
    flex: 1;
    padding: 0 12px;
    font-size: 14px;
    color: var(--color-text);
    background: transparent;
}

.search-input::placeholder {
    color: var(--color-secondary);
}

.search-btn {
    width: 48px;
    background: var(--color-primary);
    color: #fff;
    cursor: pointer;
    font-size: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background var(--transition);
}

.search-btn:hover {
    background: var(--color-primary-dark);
}

.header-hot-tags {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
    flex-shrink: 0;
    overflow: hidden;
}

.hot-label {
    color: var(--color-accent);
    font-weight: 600;
    white-space: nowrap;
}

.header-hot-tags a {
    color: var(--color-text-light);
    white-space: nowrap;
    padding: 2px 6px;
    border-radius: var(--radius-sm);
    background: var(--color-bg);
    transition: all var(--transition);
}

.header-hot-tags a:hover {
    color: var(--color-primary);
    background: var(--color-primary-light);
}

/* --- Navbar --- */
.site-navbar {
    background: var(--color-primary);
}

.navbar-list {
    display: flex;
}

.navbar-item {
    position: relative;
}

.navbar-link {
    display: block;
    padding: 12px 24px;
    color: #fff;
    font-size: 15px;
    font-weight: 500;
    transition: background var(--transition);
}

.navbar-link:hover,
.navbar-link.active {
    background: rgba(255,255,255,0.15);
    color: #fff;
}

/* --- Main --- */
.site-main {
    padding: var(--gap) 0;
}

/* --- Utility --- */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* --- Topbox --- */
.topbox {
    margin-bottom: var(--gap);
}

.topbox-grid {
    display: grid;
    grid-template-columns: 2.2fr 2.8fr;
    gap: var(--gap);
    align-items: stretch;
}

/* --- Carousel --- */
.topbox-carousel {
    border-radius: var(--radius);
    overflow: hidden;
}

.carousel-wrapper {
    position: relative;
    height: 360px;
    border-radius: var(--radius);
    overflow: hidden;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
}

.carousel-track {
    position: relative;
    height: 100%;
}

.carousel-slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: flex-end;
    opacity: 0;
    transition: opacity 0.6s ease;
    background-size: cover;
    background-position: center;
    background-repeat: no-repeat;
    pointer-events: none;
}

.carousel-slide.active {
    opacity: 1;
    pointer-events: auto;
}

.carousel-slide-placeholder {
    opacity: 1;
    pointer-events: auto;
}

.carousel-link {
    display: flex;
    align-items: flex-end;
    width: 100%;
    height: 100%;
    padding: 30px;
    background: linear-gradient(to top, rgba(0,0,0,0.7) 0%, rgba(0,0,0,0.1) 40%, transparent 70%);
    color: #fff;
}

.carousel-link:hover {
    color: #fff;
}

.carousel-text h3 {
    font-size: 22px;
    font-weight: 600;
    margin-bottom: 8px;
    line-height: 1.4;
}

.carousel-text p {
    font-size: 14px;
    opacity: 0.85;
    line-height: 1.5;
}

.carousel-arrow {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: rgba(255,255,255,0.2);
    color: #fff;
    font-size: 28px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
    transition: background var(--transition);
    border: none;
    line-height: 1;
}

.carousel-arrow:hover {
    background: rgba(255,255,255,0.35);
}

.carousel-prev {
    left: 12px;
}

.carousel-next {
    right: 12px;
}

.carousel-dots {
    position: absolute;
    bottom: 16px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 8px;
    z-index: 10;
}

.carousel-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255,255,255,0.4);
    cursor: pointer;
    border: none;
    padding: 0;
    transition: all var(--transition);
}

.carousel-dot.active {
    background: var(--color-accent);
    transform: scale(1.3);
}

/* --- Latest Content --- */
.topbox-latest {
    background: var(--color-card);
    border-radius: var(--radius);
    padding: 0;
    overflow: hidden;
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
    height: 360px;
}

.latest-header {
    padding: 12px 16px;
    border-bottom: 1px solid var(--color-border-light);
}

.latest-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-text);
}

.latest-list {
    padding: 4px 0;
    flex: 1;
    overflow-y: auto;
}

.latest-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 16px;
    font-size: 14px;
    border-bottom: 1px dashed var(--color-border-light);
    transition: background var(--transition);
}

.latest-item:last-child {
    border-bottom: none;
}

.latest-item:hover {
    background: var(--color-primary-light);
}

.latest-date {
    color: var(--color-accent);
    font-size: 12px;
    font-weight: 500;
    white-space: nowrap;
    flex-shrink: 0;
}

.latest-link {
    color: var(--color-text);
    line-height: 1.4;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.latest-link:hover {
    color: var(--color-primary);
}

/* --- Latest Two-Column Layout --- */
.latest-columns {
    display: grid;
    grid-template-columns: 1fr 1fr;
    flex: 1;
    overflow: hidden;
}

.latest-columns .latest-list {
    border-right: 1px dashed var(--color-border-light);
}

.latest-columns .latest-list:last-child {
    border-right: none;
}

/* --- Search Page --- */
.search-area {
    background: var(--color-card);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
    margin-bottom: 24px;
}

.search-form-large {
    display: flex;
    gap: 0;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: none;
}

.search-input-large {
    flex: 1;
    padding: 14px 20px;
    font-size: 16px;
    border: 2px solid var(--color-primary);
    border-right: none;
    border-radius: var(--radius) 0 0 var(--radius);
    outline: none;
    background: var(--color-card);
    color: var(--color-text);
}

.search-input-large:focus {
    border-color: var(--color-accent);
}

.search-btn-large {
    padding: 14px 28px;
    font-size: 16px;
    background: var(--color-primary);
    color: #fff;
    border: none;
    border-radius: 0 var(--radius) var(--radius) 0;
    cursor: pointer;
    transition: background var(--transition);
    white-space: nowrap;
}

.search-btn-large:hover {
    background: var(--color-accent);
}

.search-result-info {
    padding: 16px 20px;
    margin: 0 0 24px 0;
    background: var(--color-card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    font-size: 14px;
    color: var(--color-secondary);
}

.search-result-info strong {
    color: var(--color-accent);
}

.search-highlight {
    background: #fff3cd;
    color: #856404;
    padding: 1px 3px;
    border-radius: 2px;
    font-weight: 600;
}

/* --- Content Layout --- */
.content-layout {
    display: grid;
    grid-template-columns: 1fr var(--sidebar-width);
    gap: var(--gap);
}

.content-main {
    min-width: 0;
}

/* --- Section Header --- */
.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--color-primary);
}

.section-title {
    font-size: 20px;
    font-weight: 600;
    color: var(--color-text);
}

/* --- Category Grid --- */
.category-showcase {
    background: var(--color-card);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
    margin-bottom: var(--gap);
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 16px;
}

.category-card {
    border-radius: var(--radius);
    overflow: hidden;
    transition: transform var(--transition), box-shadow var(--transition);
    background: var(--color-bg);
}

.category-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-hover);
}

.category-card-link {
    display: block;
    color: var(--color-text);
}

.category-card-img {
    height: 100px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #e8f7fd, #d4eefa);
}

.category-card-img img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.category-card-fallback {
    font-size: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, #e8f7fd, #d4eefa);
}

.category-card-info {
    padding: 10px 12px;
}

.category-card-name {
    display: block;
    font-size: 15px;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 4px;
}

.category-card-latest {
    display: block;
    font-size: 12px;
    color: var(--color-secondary);
    line-height: 1.4;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* --- Article List --- */
.article-list-section {
    background: var(--color-card);
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
}

.article-list {
    display: flex;
    flex-direction: column;
}

.article-item {
    border-bottom: 1px solid var(--color-border-light);
    transition: background var(--transition);
}

.article-item:last-of-type {
    border-bottom: none;
}

.article-item:hover {
    background: var(--color-primary-light);
}

.article-item-link {
    display: flex;
    gap: 16px;
    padding: 16px 0;
    color: var(--color-text);
}

.article-item-link:hover {
    color: var(--color-text);
}

.article-item-thumb {
    width: 200px;
    height: 130px;
    flex-shrink: 0;
    border-radius: var(--radius-sm);
    overflow: hidden;
    background: var(--color-bg);
    display: flex;
    align-items: center;
    justify-content: center;
}

.article-item-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.thumb-fallback {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 48px;
    color: var(--color-secondary);
    background: linear-gradient(135deg, #f0f0f0, #e0e0e0);
}

.article-item-body {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.article-item-title {
    font-size: 18px;
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: 6px;
    color: var(--color-text);
    transition: color var(--transition);
}

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

.article-item-excerpt {
    font-size: 14px;
    color: var(--color-text-light);
    line-height: 1.6;
    margin-bottom: 8px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.article-item-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px;
    font-size: 12px;
    color: var(--color-secondary);
}

.meta-date,
.meta-category,
.meta-views,
.meta-author {
    white-space: nowrap;
}

.meta-category a {
    color: var(--color-primary);
}

.meta-category a:hover {
    text-decoration: underline;
}

.meta-tags {
    display: flex;
    gap: 4px;
    flex-wrap: wrap;
}

.tag {
    display: inline-block;
    padding: 1px 8px;
    background: var(--color-primary-light);
    color: var(--color-primary);
    border-radius: 10px;
    font-size: 11px;
    white-space: nowrap;
}

/* --- Pagination --- */
.pagination {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-top: 24px;
    padding-top: 16px;
    border-top: 1px solid var(--color-border-light);
}

.pagination-btn {
    display: inline-block;
    padding: 8px 16px;
    background: var(--color-primary);
    color: #fff;
    border-radius: var(--radius);
    font-size: 14px;
    font-weight: 500;
    transition: background var(--transition);
    min-width: 40px;
    text-align: center;
}

.pagination-current {
    display: inline-block;
    padding: 8px 16px;
    background: var(--color-accent);
    color: #fff;
    border-radius: var(--radius);
    font-size: 14px;
    font-weight: 700;
    min-width: 40px;
    text-align: center;
}

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

/* --- Breadcrumb --- */
.breadcrumb {
    font-size: 14px;
    color: var(--color-secondary);
    margin-bottom: 16px;
    padding: 10px 16px;
    background: var(--color-card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

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

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

.breadcrumb-sep {
    margin: 0 8px;
    color: var(--color-secondary);
}

.breadcrumb-current {
    color: var(--color-primary);
    font-weight: 500;
}

/* --- Category Header --- */
.category-header {
    background: var(--color-card);
    border-radius: var(--radius);
    padding: 24px 20px;
    margin-bottom: var(--gap);
    box-shadow: var(--shadow);
    border-left: 4px solid var(--color-primary);
}

.category-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 8px;
}

.category-desc {
    font-size: 14px;
    color: var(--color-text-light);
    line-height: 1.6;
}

/* --- Article Detail --- */
.article-detail {
    background: var(--color-card);
    border-radius: var(--radius);
    padding: 30px;
    box-shadow: var(--shadow);
}

.article-header {
    margin-bottom: 24px;
    padding-bottom: 20px;
    border-bottom: 1px solid var(--color-border-light);
}

.article-title {
    font-size: 26px;
    font-weight: 700;
    line-height: 1.4;
    color: var(--color-text);
    margin-bottom: 16px;
}

.article-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 16px;
    font-size: 13px;
    color: var(--color-secondary);
    margin-bottom: 12px;
}

.article-meta a {
    color: var(--color-primary);
}

.article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.article-tag {
    display: inline-block;
    padding: 4px 14px;
    background: var(--color-primary-light);
    color: var(--color-primary);
    border-radius: 15px;
    font-size: 13px;
    transition: all var(--transition);
}

.article-tag:hover {
    background: var(--color-primary);
    color: #fff;
}

.article-content {
    font-size: 16px;
    line-height: 1.8;
    color: var(--color-text);
    word-break: break-word;
}

.article-content img {
    max-width: 100%;
    height: auto;
    margin: 16px auto;
    border-radius: var(--radius-sm);
}

.article-content p {
    margin-bottom: 16px;
}

.article-content h2,
.article-content h3,
.article-content h4 {
    margin: 24px 0 12px;
    font-weight: 600;
}

.article-content h2 { font-size: 22px; }
.article-content h3 { font-size: 19px; }
.article-content h4 { font-size: 16px; }

.article-content ul,
.article-content ol {
    margin: 12px 0;
    padding-left: 24px;
}

.article-content ul { list-style: disc; }
.article-content ol { list-style: decimal; }

.article-content li {
    margin-bottom: 6px;
}

.article-content blockquote {
    margin: 16px 0;
    padding: 12px 20px;
    border-left: 4px solid var(--color-primary);
    background: var(--color-primary-light);
    color: var(--color-text-light);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

.article-content code {
    padding: 2px 6px;
    background: var(--color-bg);
    border-radius: 3px;
    font-size: 14px;
    font-family: "SF Mono", "Fira Code", monospace;
}

.article-content pre {
    margin: 16px 0;
    padding: 16px;
    background: #282c34;
    color: #abb2bf;
    border-radius: var(--radius);
    overflow-x: auto;
    font-size: 14px;
    line-height: 1.5;
}

.article-content pre code {
    background: transparent;
    padding: 0;
    color: inherit;
}

.article-content table {
    width: 100%;
    border-collapse: collapse;
    margin: 16px 0;
    font-size: 14px;
}

.article-content th,
.article-content td {
    padding: 10px 14px;
    border: 1px solid var(--color-border);
    text-align: left;
}

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

/* --- Article Nav --- */
.article-nav {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--gap);
    margin-top: 24px;
    padding-top: 20px;
    border-top: 1px solid var(--color-border-light);
}

.article-nav-prev,
.article-nav-next {
    padding: 12px 16px;
    background: var(--color-bg);
    border-radius: var(--radius);
}

.nav-label {
    display: block;
    font-size: 12px;
    color: var(--color-secondary);
    margin-bottom: 4px;
}

.article-nav-prev a,
.article-nav-next a {
    font-size: 14px;
    color: var(--color-text);
    font-weight: 500;
    line-height: 1.4;
}

.article-nav-prev a:hover,
.article-nav-next a:hover {
    color: var(--color-primary);
}

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

.nav-none {
    font-size: 14px;
    color: var(--color-secondary);
}

/* --- Empty State --- */
.empty-state {
    text-align: center;
    padding: 60px 20px;
    background: var(--color-card);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    color: var(--color-secondary);
}

.empty-state p {
    font-size: 16px;
    margin-bottom: 16px;
}

.btn-back {
    display: inline-block;
    padding: 8px 24px;
    background: var(--color-primary);
    color: #fff;
    border-radius: var(--radius);
    font-size: 14px;
    transition: background var(--transition);
}

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

/* --- Sidebar --- */
.content-sidebar {
    display: flex;
    flex-direction: column;
    gap: var(--gap);
}

.sidebar-widget {
    background: var(--color-card);
    border-radius: var(--radius);
    padding: 16px;
    box-shadow: var(--shadow);
}

.widget-title {
    font-size: 16px;
    font-weight: 600;
    margin-bottom: 12px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--color-primary);
    color: var(--color-text);
}

.sidebar-search {
    display: flex;
    gap: 0;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    overflow: hidden;
}

.sidebar-search-input {
    flex: 1;
    padding: 8px 12px;
    font-size: 14px;
    border: none;
    outline: none;
}

.sidebar-search-btn {
    padding: 8px 16px;
    background: var(--color-primary);
    color: #fff;
    cursor: pointer;
    font-size: 13px;
    border: none;
    transition: background var(--transition);
}

.sidebar-search-btn:hover {
    background: var(--color-primary-dark);
}

.sidebar-links {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.sidebar-links a {
    display: block;
    padding: 6px 0;
    font-size: 14px;
    color: var(--color-text-light);
    border-bottom: 1px dashed var(--color-border-light);
    transition: color var(--transition);
}

.sidebar-links a:last-child {
    border-bottom: none;
}

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

.hot-link {
    display: flex;
    align-items: center;
    gap: 8px;
}

.hot-rank {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
    border-radius: 4px;
    background: var(--color-border-light);
    color: var(--color-secondary);
    font-size: 12px;
    font-weight: 700;
    flex-shrink: 0;
}

.hot-link:first-child .hot-rank {
    background: var(--color-accent);
    color: #fff;
}

.hot-link:nth-child(2) .hot-rank {
    background: var(--color-primary);
    color: #fff;
}

.hot-link:nth-child(3) .hot-rank {
    background: #4caf50;
    color: #fff;
}

/* --- Footer --- */
.site-footer {
    background: #2c3e50;
    color: #b0bec5;
    margin-top: 30px;
    padding: 30px 0 20px;
}

.footer-links {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin-bottom: 24px;
}

.footer-links .footer-section:last-child {
    text-align: right;
}

.footer-links .footer-section:last-child .qrcode-placeholder {
    justify-content: flex-end;
}

.footer-title {
    font-size: 13px;
    font-weight: 500;
    color: rgba(255,255,255,0.45);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 16px;
}

.friend-links {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.friend-links a {
    display: inline-block;
    padding: 4px 12px;
    font-size: 13px;
    color: #b0bec5;
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: var(--radius-sm);
    transition: all var(--transition);
}

.friend-links a:hover {
    color: #fff;
    border-color: var(--color-primary);
    background: rgba(24,173,229,0.15);
}

.qrcode-placeholder {
    display: flex;
    align-items: center;
    gap: 12px;
}

.qrcode-image {
    width: 56px;
    height: 56px;
    object-fit: contain;
    border-radius: 6px;
    border: 1px solid rgba(255,255,255,0.1);
}

.qrcode-icon {
    font-size: 24px;
    opacity: 0.6;
}

.qrcode-text {
    font-size: 13px;
    color: #90a4ae;
}

.about-text {
    font-size: 13px;
    line-height: 1.7;
    color: #78909c;
    max-width: 320px;
}

.footer-bottom {
    text-align: center;
    padding-top: 16px;
    border-top: 1px solid rgba(255,255,255,0.08);
}

.copyright {
    font-size: 13px;
    color: #78909c;
}

.footer-icp {
    margin-left: 10px;
}

.footer-custom {
    margin-top: 8px;
    font-size: 12px;
    color: #607d8b;
}

/* --- Back to Top --- */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background: var(--color-primary);
    color: #fff;
    font-size: 22px;
    cursor: pointer;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 12px rgba(24,173,229,0.4);
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.3s ease;
    z-index: 100;
}

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

.back-to-top:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 16px rgba(24,173,229,0.5);
}

/* --- Lazy Loading --- */
img[loading="lazy"] {
    transition: opacity 0.4s ease;
}

img[loading="lazy"].lazy-loaded {
    opacity: 1;
}

/* ============================================================
   响应式 - ≤768px 单列
   ============================================================ */
@media (max-width: 768px) {
    :root {
        --gap: 12px;
    }

    .container {
        padding: 0 12px;
    }

    /* Header */
    .header-top-inner {
        flex-wrap: wrap;
        height: auto;
        padding: 10px 0;
        gap: 8px;
    }

    .header-search {
        order: 3;
        max-width: 100%;
        flex: 1 1 100%;
    }

    .header-hot-tags {
        display: none;
    }

    .site-logo {
        font-size: 18px;
    }

    .logo-icon {
        font-size: 24px;
    }

    /* Navbar - horizontal scroll */
    .navbar-list {
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .navbar-link {
        padding: 10px 14px;
        font-size: 13px;
        white-space: nowrap;
    }

    /* Topbox - single column */
    .topbox-grid {
        grid-template-columns: 1fr;
    }

    .carousel-wrapper {
        height: 220px;
    }

    .carousel-text h3 {
        font-size: 17px;
    }

    .carousel-text p {
        font-size: 12px;
    }

    .carousel-arrow {
        width: 34px;
        height: 34px;
        font-size: 22px;
    }

    .latest-list {
        max-height: 300px;
    }

    .latest-item {
        padding: 6px 12px;
        font-size: 13px;
    }

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

    .ad-link {
        font-size: 12px;
        padding: 8px 6px;
    }

    /* Content - single column */
    .content-layout {
        grid-template-columns: 1fr;
    }

    /* Category grid */
    .category-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .category-card-img {
        height: 80px;
    }

    /* Article list */
    .article-item-link {
        flex-direction: column;
    }

    .article-item-thumb {
        width: 100%;
        height: 180px;
    }

    .article-item-title {
        font-size: 16px;
    }

    .article-item-excerpt {
        -webkit-line-clamp: 3;
        font-size: 13px;
    }

    .article-item-meta {
        gap: 8px;
    }

    /* Article detail */
    .article-detail {
        padding: 16px;
    }

    .article-title {
        font-size: 20px;
    }

    .article-content {
        font-size: 15px;
    }

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

    .article-nav-next {
        text-align: left;
    }

    /* Category header */
    .category-header {
        padding: 16px;
    }

    .category-title {
        font-size: 20px;
    }

    /* Sidebar */
    .content-sidebar {
        gap: 12px;
    }

    /* Footer */
    .footer-links {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .footer-section {
        text-align: center;
    }

    .footer-hide-mobile {
        display: none;
    }

    .friend-links {
        justify-content: center;
    }

    /* Back to top - smaller */
    .back-to-top {
        bottom: 16px;
        right: 16px;
        width: 36px;
        height: 36px;
        font-size: 18px;
    }
}

/* --- XS screens --- */
@media (max-width: 480px) {
    .category-grid {
        grid-template-columns: 1fr;
    }

    .section-title {
        font-size: 17px;
    }

    .article-item-thumb {
        height: 150px;
    }

    .carousel-wrapper {
        height: 180px;
    }

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