/* =============================================
   蘑菇视频 - 主样式文件
   ============================================= */

/* 基础重置与变量 */
:root {
    --primary: #e8520a;
    --primary-dark: #c44008;
    --primary-light: #ff7a3d;
    --secondary: #2d8c3e;
    --secondary-light: #4caf50;
    --accent: #ff9800;
    --bg-main: #f5f5f5;
    --bg-white: #ffffff;
    --bg-dark: #1a1a2e;
    --text-main: #333333;
    --text-muted: #666666;
    --text-light: #999999;
    --border: #e0e0e0;
    --shadow: 0 2px 12px rgba(0,0,0,0.08);
    --shadow-hover: 0 8px 24px rgba(0,0,0,0.15);
    --radius: 8px;
    --radius-lg: 12px;
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", Arial, sans-serif;
    background: var(--bg-main);
    color: var(--text-main);
    font-size: 15px;
    line-height: 1.7;
}

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

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

ul, ol {
    list-style: none;
}

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

.section-title {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-main);
    padding-left: 12px;
    border-left: 4px solid var(--primary);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.section-title .more-link {
    font-size: 13px;
    font-weight: 400;
    color: var(--text-muted);
    margin-left: auto;
}

.section-title .more-link:hover {
    color: var(--primary);
}

/* =============================================
   顶部公告栏
   ============================================= */
.top-bar {
    background: var(--bg-dark);
    color: #ccc;
    font-size: 12px;
    padding: 6px 0;
}

.top-bar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.top-bar a {
    color: #ccc;
}

.top-bar a:hover {
    color: var(--primary-light);
}

.top-bar .domain-display {
    color: var(--primary-light);
    font-weight: 600;
}

/* =============================================
   头部导航
   ============================================= */
.site-header {
    background: var(--bg-white);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-main {
    display: flex;
    align-items: center;
    padding: 14px 0;
    gap: 30px;
}

.site-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}

.site-logo img {
    width: 44px;
    height: 44px;
    object-fit: contain;
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-name {
    font-size: 22px;
    font-weight: 800;
    color: var(--primary);
    line-height: 1.2;
}

.logo-slogan {
    font-size: 11px;
    color: var(--text-muted);
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 4px;
    flex: 1;
}

.main-nav a {
    padding: 8px 14px;
    border-radius: var(--radius);
    font-size: 14px;
    font-weight: 500;
    color: var(--text-main);
    white-space: nowrap;
}

.main-nav a:hover,
.main-nav a.active {
    background: var(--primary);
    color: #fff;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}

.btn-download {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff !important;
    padding: 8px 20px;
    border-radius: 20px;
    font-size: 14px;
    font-weight: 600;
    white-space: nowrap;
}

.btn-download:hover {
    background: linear-gradient(135deg, var(--primary-light), var(--primary));
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(232,82,10,0.4);
}

/* =============================================
   搜索框
   ============================================= */
.search-bar-wrap {
    background: #fff7f3;
    border-top: 1px solid #ffe0cc;
    border-bottom: 1px solid #ffe0cc;
    padding: 10px 0;
}

.search-form {
    display: flex;
    align-items: center;
    max-width: 600px;
    margin: 0 auto;
    background: #fff;
    border: 2px solid var(--primary);
    border-radius: 24px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(232,82,10,0.1);
}

.search-form input {
    flex: 1;
    border: none;
    outline: none;
    padding: 9px 18px;
    font-size: 14px;
    background: transparent;
    color: var(--text-main);
}

.search-form input::placeholder {
    color: var(--text-light);
}

.search-form button {
    background: var(--primary);
    border: none;
    color: #fff;
    padding: 9px 22px;
    font-size: 14px;
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
}

.search-form button:hover {
    background: var(--primary-dark);
}

/* =============================================
   Hero Banner
   ============================================= */
.hero-section {
    position: relative;
    overflow: hidden;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
}

.hero-inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    align-items: center;
    padding: 50px 0;
}

.hero-content {
    color: #fff;
}

.hero-badge {
    display: inline-block;
    background: var(--primary);
    color: #fff;
    font-size: 12px;
    padding: 4px 12px;
    border-radius: 12px;
    margin-bottom: 16px;
    font-weight: 600;
}

.hero-title {
    font-size: 36px;
    font-weight: 800;
    line-height: 1.3;
    margin-bottom: 16px;
}

.hero-title span {
    color: var(--primary-light);
}

.hero-desc {
    font-size: 15px;
    color: #aab;
    margin-bottom: 28px;
    line-height: 1.8;
}

.hero-btns {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    padding: 12px 28px;
    border-radius: 24px;
    font-size: 15px;
    font-weight: 700;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    box-shadow: 0 4px 16px rgba(232,82,10,0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(232,82,10,0.5);
}

.btn-outline {
    border: 2px solid rgba(255,255,255,0.4);
    color: #fff;
    padding: 12px 28px;
    border-radius: 24px;
    font-size: 15px;
    font-weight: 600;
}

.btn-outline:hover {
    border-color: var(--primary-light);
    color: var(--primary-light);
}

.hero-image {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0,0,0,0.4);
}

.hero-image img {
    width: 100%;
    height: 300px;
    object-fit: cover;
}

/* =============================================
   主内容区布局
   ============================================= */
.main-content {
    padding: 30px 0;
}

.content-layout {
    display: grid;
    grid-template-columns: 1fr 320px;
    gap: 24px;
}

/* =============================================
   视频卡片
   ============================================= */
.video-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-bottom: 30px;
}

.video-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    cursor: pointer;
}

.video-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}

.video-thumb {
    position: relative;
    overflow: hidden;
    aspect-ratio: 16/9;
    background: #000;
}

.video-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.video-card:hover .video-thumb img {
    transform: scale(1.05);
}

.play-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%) scale(0);
    width: 52px;
    height: 52px;
    background: rgba(232,82,10,0.92);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.3s ease;
    box-shadow: 0 4px 16px rgba(0,0,0,0.3);
}

.play-btn::after {
    content: '';
    width: 0;
    height: 0;
    border-top: 10px solid transparent;
    border-bottom: 10px solid transparent;
    border-left: 18px solid #fff;
    margin-left: 3px;
}

.video-card:hover .play-btn {
    transform: translate(-50%, -50%) scale(1);
}

.video-duration {
    position: absolute;
    bottom: 8px;
    right: 8px;
    background: rgba(0,0,0,0.75);
    color: #fff;
    font-size: 11px;
    padding: 2px 7px;
    border-radius: 4px;
}

.video-tag {
    position: absolute;
    top: 8px;
    left: 8px;
    background: var(--primary);
    color: #fff;
    font-size: 11px;
    padding: 2px 8px;
    border-radius: 4px;
    font-weight: 600;
}

.video-info {
    padding: 12px;
}

.video-title {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-main);
    line-height: 1.5;
    margin-bottom: 8px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.video-meta {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 12px;
    color: var(--text-light);
}

.video-stats {
    display: flex;
    gap: 10px;
    font-size: 12px;
    color: var(--text-light);
    margin-top: 6px;
}

.video-stats span {
    display: flex;
    align-items: center;
    gap: 3px;
}

/* =============================================
   文章列表
   ============================================= */
.article-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.article-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    display: flex;
    gap: 16px;
    padding: 16px;
    transition: var(--transition);
}

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

.article-thumb {
    flex-shrink: 0;
    width: 140px;
    height: 90px;
    border-radius: var(--radius);
    overflow: hidden;
}

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

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

.article-body {
    flex: 1;
    min-width: 0;
}

.article-category {
    display: inline-block;
    background: #fff3ee;
    color: var(--primary);
    font-size: 11px;
    padding: 2px 8px;
    border-radius: 4px;
    margin-bottom: 6px;
    font-weight: 600;
}

.article-title {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 6px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    line-height: 1.5;
}

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

.article-summary {
    font-size: 13px;
    color: var(--text-muted);
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: 8px;
}

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

.article-meta .author {
    color: var(--secondary);
    font-weight: 500;
}

/* =============================================
   热点资讯
   ============================================= */
.hot-list {
    display: flex;
    flex-direction: column;
    gap: 0;
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.hot-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border-bottom: 1px solid var(--border);
    transition: var(--transition);
}

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

.hot-item:hover {
    background: #fff7f3;
}

.hot-rank {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--border);
    color: var(--text-muted);
    font-size: 12px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.hot-rank.top1 { background: #e8520a; color: #fff; }
.hot-rank.top2 { background: #ff7a3d; color: #fff; }
.hot-rank.top3 { background: #ffb347; color: #fff; }

.hot-title {
    flex: 1;
    font-size: 14px;
    color: var(--text-main);
    display: -webkit-box;
    -webkit-line-clamp: 1;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

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

.hot-views {
    font-size: 12px;
    color: var(--text-light);
    flex-shrink: 0;
}

/* =============================================
   侧边栏
   ============================================= */
.sidebar {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.sidebar-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 18px;
    box-shadow: var(--shadow);
}

.sidebar-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-main);
    padding-bottom: 12px;
    border-bottom: 2px solid var(--primary);
    margin-bottom: 14px;
}

/* 热门标签 */
.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.tag-item {
    background: #f5f5f5;
    color: var(--text-muted);
    font-size: 12px;
    padding: 4px 12px;
    border-radius: 14px;
    transition: var(--transition);
}

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

/* 推荐作者 */
.author-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.author-item {
    display: flex;
    align-items: center;
    gap: 10px;
}

.author-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    overflow: hidden;
    flex-shrink: 0;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    color: #fff;
    font-size: 16px;
    font-weight: 700;
}

.author-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.author-info {
    flex: 1;
    min-width: 0;
}

.author-name {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-main);
}

.author-role {
    font-size: 12px;
    color: var(--text-light);
}

.author-follow {
    background: var(--primary);
    color: #fff;
    font-size: 12px;
    padding: 4px 12px;
    border-radius: 12px;
    flex-shrink: 0;
    cursor: pointer;
    transition: var(--transition);
}

.author-follow:hover {
    background: var(--primary-dark);
}

/* 下载卡片 */
.download-card {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    text-align: center;
    padding: 20px;
    border-radius: var(--radius-lg);
}

.download-card .title {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 8px;
}

.download-card .desc {
    font-size: 13px;
    opacity: 0.85;
    margin-bottom: 16px;
}

.download-card .btn-dl {
    background: #fff;
    color: var(--primary);
    padding: 10px 24px;
    border-radius: 20px;
    font-weight: 700;
    font-size: 14px;
    display: inline-block;
}

.download-card .btn-dl:hover {
    background: #fff7f3;
    transform: translateY(-1px);
}

/* =============================================
   专题策划
   ============================================= */
.special-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
    margin-bottom: 30px;
}

.special-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    position: relative;
}

.special-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-hover);
}

.special-thumb {
    height: 160px;
    overflow: hidden;
}

.special-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.4s ease;
}

.special-card:hover .special-thumb img {
    transform: scale(1.06);
}

.special-body {
    padding: 14px;
}

.special-label {
    display: inline-block;
    background: var(--secondary);
    color: #fff;
    font-size: 11px;
    padding: 2px 8px;
    border-radius: 4px;
    margin-bottom: 6px;
    font-weight: 600;
}

.special-title {
    font-size: 15px;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 6px;
    line-height: 1.4;
}

.special-desc {
    font-size: 13px;
    color: var(--text-muted);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* =============================================
   FAQ 区域
   ============================================= */
.faq-section {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: var(--shadow);
    margin-bottom: 30px;
}

.faq-list {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.faq-item {
    border-bottom: 1px solid var(--border);
}

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

.faq-question {
    padding: 16px 0;
    font-size: 15px;
    font-weight: 600;
    color: var(--text-main);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    transition: var(--transition);
}

.faq-question:hover {
    color: var(--primary);
}

.faq-question::before {
    content: 'Q';
    background: var(--primary);
    color: #fff;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    font-size: 12px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.faq-icon {
    font-size: 18px;
    color: var(--text-light);
    transition: transform 0.3s;
    flex-shrink: 0;
}

.faq-item.open .faq-icon {
    transform: rotate(45deg);
    color: var(--primary);
}

.faq-answer {
    display: none;
    padding: 0 0 16px 34px;
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.8;
}

.faq-item.open .faq-answer {
    display: block;
}

/* =============================================
   用户评论
   ============================================= */
.reviews-section {
    margin-bottom: 30px;
}

.reviews-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.review-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 18px;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.review-card:hover {
    box-shadow: var(--shadow-hover);
}

.review-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
}

.review-avatar {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    color: #fff;
    font-size: 14px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.review-user {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-main);
}

.review-stars {
    margin-left: auto;
    color: var(--accent);
    font-size: 13px;
}

.review-content {
    font-size: 14px;
    color: var(--text-muted);
    line-height: 1.7;
}

/* =============================================
   投稿/联系入口
   ============================================= */
.contact-section {
    background: linear-gradient(135deg, #f8f9ff 0%, #fff7f3 100%);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 30px;
    text-align: center;
    margin-bottom: 30px;
}

.contact-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 10px;
}

.contact-desc {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 20px;
}

.contact-btns {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

.btn-contact {
    background: var(--primary);
    color: #fff;
    padding: 11px 28px;
    border-radius: 22px;
    font-size: 14px;
    font-weight: 600;
    transition: var(--transition);
}

.btn-contact:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

.btn-contact-outline {
    border: 2px solid var(--primary);
    color: var(--primary);
    padding: 11px 28px;
    border-radius: 22px;
    font-size: 14px;
    font-weight: 600;
    transition: var(--transition);
}

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

/* =============================================
   页脚
   ============================================= */
.site-footer {
    background: var(--bg-dark);
    color: #aab;
    padding: 40px 0 20px;
    margin-top: 20px;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 30px;
    margin-bottom: 30px;
}

.footer-brand .logo-wrap {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 14px;
}

.footer-brand .logo-wrap img {
    width: 36px;
    height: 36px;
}

.footer-brand .brand-name {
    font-size: 18px;
    font-weight: 800;
    color: var(--primary-light);
}

.footer-brand p {
    font-size: 13px;
    line-height: 1.8;
    margin-bottom: 12px;
}

.footer-domain {
    font-size: 13px;
    color: #ccc;
}

.footer-domain .domain-val {
    color: var(--primary-light);
    font-weight: 600;
}

.footer-col h4 {
    font-size: 15px;
    font-weight: 700;
    color: #ddd;
    margin-bottom: 14px;
}

.footer-col ul li {
    margin-bottom: 8px;
}

.footer-col ul li a {
    font-size: 13px;
    color: #aab;
    transition: var(--transition);
}

.footer-col ul li a:hover {
    color: var(--primary-light);
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 10px;
    font-size: 12px;
    color: #778;
}

.footer-bottom a {
    color: #778;
}

.footer-bottom a:hover {
    color: var(--primary-light);
}

/* =============================================
   面包屑
   ============================================= */
.breadcrumb {
    padding: 10px 0;
    font-size: 13px;
    color: var(--text-light);
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
}

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

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

.breadcrumb .sep {
    color: var(--border);
}

/* =============================================
   分页
   ============================================= */
.pagination {
    display: flex;
    justify-content: center;
    gap: 6px;
    margin-top: 24px;
}

.page-btn {
    width: 36px;
    height: 36px;
    border-radius: var(--radius);
    background: var(--bg-white);
    color: var(--text-main);
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
    cursor: pointer;
}

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

/* =============================================
   响应式
   ============================================= */
@media (max-width: 1024px) {
    .content-layout {
        grid-template-columns: 1fr;
    }
    .sidebar {
        display: grid;
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .hero-inner {
        grid-template-columns: 1fr;
        padding: 30px 0;
    }
    .hero-image {
        display: none;
    }
    .hero-title {
        font-size: 26px;
    }
    .video-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .special-grid {
        grid-template-columns: 1fr;
    }
    .reviews-grid {
        grid-template-columns: 1fr;
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    .main-nav {
        display: none;
    }
    .sidebar {
        grid-template-columns: 1fr;
    }
    .header-main {
        gap: 16px;
    }
}

@media (max-width: 480px) {
    .video-grid {
        grid-template-columns: 1fr;
    }
    .footer-grid {
        grid-template-columns: 1fr;
    }
    .hero-btns {
        flex-direction: column;
    }
    .article-card {
        flex-direction: column;
    }
    .article-thumb {
        width: 100%;
        height: 160px;
    }
}

/* =============================================
   文章详情页
   ============================================= */
.article-detail {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 28px;
    box-shadow: var(--shadow);
}

.article-detail h1 {
    font-size: 24px;
    font-weight: 800;
    color: var(--text-main);
    line-height: 1.4;
    margin-bottom: 14px;
}

.article-detail-meta {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 13px;
    color: var(--text-light);
    padding-bottom: 16px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.article-detail-meta .author {
    color: var(--secondary);
    font-weight: 600;
}

.article-body-content {
    font-size: 15px;
    line-height: 1.9;
    color: var(--text-main);
}

.article-body-content h2 {
    font-size: 19px;
    font-weight: 700;
    margin: 24px 0 12px;
    color: var(--text-main);
    padding-left: 10px;
    border-left: 3px solid var(--primary);
}

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

.article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 20px;
    padding-top: 16px;
    border-top: 1px solid var(--border);
}

.article-tags .tag {
    background: #f5f5f5;
    color: var(--text-muted);
    font-size: 12px;
    padding: 4px 12px;
    border-radius: 14px;
}

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

/* 相关文章 */
.related-articles {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 20px;
    box-shadow: var(--shadow);
    margin-top: 20px;
}

.related-list {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
    margin-top: 14px;
}

.related-item {
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: 0 1px 6px rgba(0,0,0,0.06);
    transition: var(--transition);
}

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

.related-item img {
    width: 100%;
    height: 90px;
    object-fit: cover;
}

.related-item .r-title {
    padding: 8px;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-main);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

/* =============================================
   栏目页
   ============================================= */
.category-header {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: #fff;
    padding: 24px;
    border-radius: var(--radius-lg);
    margin-bottom: 20px;
}

.category-header h1 {
    font-size: 24px;
    font-weight: 800;
    margin-bottom: 6px;
}

.category-header p {
    font-size: 14px;
    opacity: 0.85;
}

/* =============================================
   关于/联系页
   ============================================= */
.about-section {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: 30px;
    box-shadow: var(--shadow);
    margin-bottom: 20px;
}

.about-section h2 {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 14px;
    padding-left: 10px;
    border-left: 3px solid var(--primary);
}

.about-section p {
    font-size: 15px;
    color: var(--text-muted);
    line-height: 1.9;
    margin-bottom: 12px;
}

.contact-info-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    margin-top: 16px;
}

.contact-info-item {
    background: #f9f9f9;
    border-radius: var(--radius);
    padding: 16px;
    text-align: center;
}

.contact-info-item .icon {
    font-size: 28px;
    margin-bottom: 8px;
}

.contact-info-item .label {
    font-size: 13px;
    color: var(--text-light);
    margin-bottom: 4px;
}

.contact-info-item .value {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-main);
}

/* =============================================
   搜索结果提示
   ============================================= */
.search-tip {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #fff;
    border: 1px solid var(--border);
    border-radius: 0 0 var(--radius) var(--radius);
    padding: 12px 16px;
    font-size: 13px;
    color: var(--text-muted);
    box-shadow: var(--shadow);
    z-index: 100;
}

.search-form-wrap {
    position: relative;
}

/* =============================================
   滚动进度条
   ============================================= */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
    z-index: 9999;
    transition: width 0.1s linear;
}

/* =============================================
   返回顶部
   ============================================= */
.back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 44px;
    height: 44px;
    background: var(--primary);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 16px rgba(232,82,10,0.4);
    cursor: pointer;
    opacity: 0;
    transform: translateY(20px);
    transition: var(--transition);
    z-index: 999;
    font-size: 18px;
}

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

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}