/* ========================================
   高清视频 - 影视传媒视频社区 全站样式
   品牌色彩系统 | 原创设计
   ======================================== */

/* CSS变量定义 */
:root {
    --hj-primary: #1a1a2e;
    --hj-secondary: #16213e;
    --hj-accent: #e94560;
    --hj-ocean: #0f3460;
    --hj-bg: #f8f9fa;
    --hj-text: #2d3436;
    --hj-text-light: #636e72;
    --hj-white: #ffffff;
    --hj-border: #dfe6e9;
    --hj-gradient: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    --hj-gradient-accent: linear-gradient(135deg, #e94560 0%, #c0392b 100%);
    --hj-shadow: 0 4px 20px rgba(26, 26, 46, 0.12);
    --hj-shadow-hover: 0 8px 30px rgba(26, 26, 46, 0.2);
    --hj-radius: 12px;
    --hj-radius-sm: 8px;
    --hj-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* 重置与基础 */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", sans-serif;
    color: var(--hj-text);
    background: var(--hj-bg);
    line-height: 1.7;
    overflow-x: hidden;
}
a { color: var(--hj-accent); text-decoration: none; transition: var(--hj-transition); }
a:hover { color: var(--hj-primary); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }

/* ===== 顶部导航 ===== */
.hj-header {
    background: var(--hj-gradient);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: 0 2px 20px rgba(0,0,0,0.3);
}
.hj-header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-top: 0;
    padding-bottom: 0;
    height: 68px;
}
.hj-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}
.hj-logo img { height: 42px; width: auto; }
.hj-logo span {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--hj-white);
    letter-spacing: 2px;
}
.hj-nav { display: flex; align-items: center; gap: 4px; }
.hj-nav a {
    color: rgba(255,255,255,0.85);
    padding: 8px 14px;
    border-radius: var(--hj-radius-sm);
    font-size: 0.92rem;
    font-weight: 500;
    transition: var(--hj-transition);
    white-space: nowrap;
}
.hj-nav a:hover, .hj-nav a.active {
    color: var(--hj-white);
    background: rgba(233, 69, 96, 0.3);
}
.hj-mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 8px;
}
.hj-mobile-toggle span {
    width: 24px;
    height: 2px;
    background: var(--hj-white);
    border-radius: 2px;
    transition: var(--hj-transition);
}

/* ===== 搜索栏 ===== */
.hj-search-bar {
    background: var(--hj-secondary);
    padding: 12px 0;
    border-bottom: 1px solid rgba(255,255,255,0.08);
}
.hj-search-bar .container {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
}
.hj-search-box {
    display: flex;
    align-items: center;
    background: rgba(255,255,255,0.1);
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: 24px;
    padding: 0 6px 0 18px;
    width: 100%;
    max-width: 560px;
    transition: var(--hj-transition);
}
.hj-search-box:focus-within {
    background: rgba(255,255,255,0.15);
    border-color: var(--hj-accent);
}
.hj-search-box input {
    flex: 1;
    background: none;
    border: none;
    outline: none;
    color: var(--hj-white);
    font-size: 0.9rem;
    padding: 10px 0;
}
.hj-search-box input::placeholder { color: rgba(255,255,255,0.5); }
.hj-search-btn {
    background: var(--hj-gradient-accent);
    color: var(--hj-white);
    border: none;
    padding: 8px 20px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 600;
    transition: var(--hj-transition);
}
.hj-search-btn:hover { opacity: 0.9; transform: scale(1.02); }
.hj-search-tags { display: flex; gap: 8px; flex-wrap: wrap; justify-content: center; margin-top: 8px; }
.hj-search-tags a {
    color: rgba(255,255,255,0.6);
    font-size: 0.78rem;
    padding: 2px 10px;
    border: 1px solid rgba(255,255,255,0.15);
    border-radius: 12px;
    transition: var(--hj-transition);
}
.hj-search-tags a:hover { color: var(--hj-white); border-color: var(--hj-accent); }

/* ===== 面包屑 ===== */
.hj-breadcrumb {
    padding: 14px 0;
    font-size: 0.85rem;
    color: var(--hj-text-light);
}
.hj-breadcrumb a { color: var(--hj-ocean); }
.hj-breadcrumb span { margin: 0 6px; }

/* ===== Hero Banner ===== */
.hj-hero {
    position: relative;
    height: 520px;
    overflow: hidden;
    background: var(--hj-gradient);
}
.hj-hero-bg {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    opacity: 0.35;
}
.hj-hero-content {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    height: 100%;
    text-align: center;
    color: var(--hj-white);
    padding: 0 20px;
}
.hj-hero h1 {
    font-size: 2.8rem;
    font-weight: 800;
    margin-bottom: 16px;
    text-shadow: 0 2px 10px rgba(0,0,0,0.3);
    line-height: 1.3;
}
.hj-hero h1 em {
    font-style: normal;
    color: var(--hj-accent);
}
.hj-hero p {
    font-size: 1.15rem;
    max-width: 680px;
    margin-bottom: 28px;
    opacity: 0.9;
    line-height: 1.8;
}
.hj-hero-btns { display: flex; gap: 16px; flex-wrap: wrap; justify-content: center; }
.hj-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    border-radius: 30px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--hj-transition);
    border: 2px solid transparent;
}
.hj-btn-primary {
    background: var(--hj-gradient-accent);
    color: var(--hj-white);
}
.hj-btn-primary:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(233,69,96,0.4); color: var(--hj-white); }
.hj-btn-outline {
    border-color: var(--hj-white);
    color: var(--hj-white);
    background: transparent;
}
.hj-btn-outline:hover { background: var(--hj-white); color: var(--hj-primary); }

/* ===== 通用板块 ===== */
.hj-section {
    padding: 60px 0;
}
.hj-section:nth-child(even) {
    background: var(--hj-white);
}
.hj-section-header {
    text-align: center;
    margin-bottom: 42px;
}
.hj-section-header h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--hj-primary);
    margin-bottom: 12px;
    position: relative;
    display: inline-block;
}
.hj-section-header h2::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 50%;
    transform: translateX(-50%);
    width: 50px;
    height: 3px;
    background: var(--hj-gradient-accent);
    border-radius: 2px;
}
.hj-section-header p {
    color: var(--hj-text-light);
    font-size: 1rem;
    max-width: 600px;
    margin: 16px auto 0;
}

/* ===== 视频卡片网格 ===== */
.hj-video-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}
.hj-video-card {
    background: var(--hj-white);
    border-radius: var(--hj-radius);
    overflow: hidden;
    box-shadow: var(--hj-shadow);
    transition: var(--hj-transition);
    cursor: pointer;
}
.hj-video-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--hj-shadow-hover);
}
.hj-video-thumb {
    position: relative;
    padding-top: 56.25%;
    overflow: hidden;
    background: var(--hj-primary);
}
.hj-video-thumb img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--hj-transition);
}
.hj-video-card:hover .hj-video-thumb img {
    transform: scale(1.05);
}
.hj-video-play {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(0,0,0,0.3);
    opacity: 0;
    transition: var(--hj-transition);
}
.hj-video-card:hover .hj-video-play { opacity: 1; }
.hj-video-play-icon {
    width: 54px;
    height: 54px;
    background: rgba(233, 69, 96, 0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--hj-transition);
}
.hj-video-play-icon::after {
    content: '';
    display: block;
    width: 0;
    height: 0;
    border-style: solid;
    border-width: 10px 0 10px 18px;
    border-color: transparent transparent transparent white;
    margin-left: 3px;
}
.hj-video-card:hover .hj-video-play-icon { transform: scale(1.1); }
.hj-video-duration {
    position: absolute;
    bottom: 8px;
    right: 8px;
    background: rgba(0,0,0,0.75);
    color: white;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
}
.hj-video-info {
    padding: 14px;
}
.hj-video-info h3 {
    font-size: 0.92rem;
    font-weight: 600;
    color: var(--hj-text);
    margin-bottom: 8px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    line-height: 1.4;
}
.hj-video-meta {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.78rem;
    color: var(--hj-text-light);
}
.hj-video-meta span { display: flex; align-items: center; gap: 3px; }
.hj-video-tags {
    display: flex;
    gap: 6px;
    margin-top: 8px;
    flex-wrap: wrap;
}
.hj-tag {
    background: rgba(15, 52, 96, 0.08);
    color: var(--hj-ocean);
    padding: 2px 10px;
    border-radius: 12px;
    font-size: 0.72rem;
    font-weight: 500;
}

/* ===== 分类模块卡片 ===== */
.hj-category-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}
.hj-category-card {
    background: var(--hj-white);
    border-radius: var(--hj-radius);
    padding: 28px 20px;
    text-align: center;
    box-shadow: var(--hj-shadow);
    transition: var(--hj-transition);
    border: 2px solid transparent;
}
.hj-category-card:hover {
    transform: translateY(-4px);
    border-color: var(--hj-accent);
    box-shadow: var(--hj-shadow-hover);
}
.hj-category-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 16px;
    background: var(--hj-gradient);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
}
.hj-category-card h3 {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--hj-primary);
    margin-bottom: 8px;
}
.hj-category-card p {
    font-size: 0.85rem;
    color: var(--hj-text-light);
    line-height: 1.6;
}

/* ===== 专家展示 ===== */
.hj-expert-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}
.hj-expert-card {
    background: var(--hj-white);
    border-radius: var(--hj-radius);
    overflow: hidden;
    box-shadow: var(--hj-shadow);
    text-align: center;
    transition: var(--hj-transition);
}
.hj-expert-card:hover { transform: translateY(-4px); box-shadow: var(--hj-shadow-hover); }
.hj-expert-avatar {
    width: 100%;
    aspect-ratio: 1;
    object-fit: cover;
}
.hj-expert-info {
    padding: 18px 16px;
}
.hj-expert-info h3 {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--hj-primary);
    margin-bottom: 4px;
}
.hj-expert-info .role {
    font-size: 0.82rem;
    color: var(--hj-accent);
    font-weight: 600;
    margin-bottom: 8px;
}
.hj-expert-info p {
    font-size: 0.82rem;
    color: var(--hj-text-light);
    line-height: 1.5;
    margin-bottom: 12px;
}
.hj-expert-btns { display: flex; gap: 8px; justify-content: center; }
.hj-btn-sm {
    padding: 6px 16px;
    font-size: 0.78rem;
    border-radius: 20px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--hj-transition);
}

/* ===== 合作品牌 ===== */
.hj-partner-wall {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    justify-content: center;
    align-items: center;
}
.hj-partner-item {
    background: var(--hj-white);
    padding: 16px 28px;
    border-radius: var(--hj-radius-sm);
    box-shadow: var(--hj-shadow);
    font-size: 1rem;
    font-weight: 700;
    color: var(--hj-primary);
    transition: var(--hj-transition);
    border: 1px solid var(--hj-border);
}
.hj-partner-item:hover { border-color: var(--hj-accent); transform: scale(1.05); }

/* ===== 用户评论 ===== */
.hj-review-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}
.hj-review-card {
    background: var(--hj-white);
    border-radius: var(--hj-radius);
    padding: 24px;
    box-shadow: var(--hj-shadow);
    transition: var(--hj-transition);
}
.hj-review-card:hover { transform: translateY(-3px); box-shadow: var(--hj-shadow-hover); }
.hj-review-stars { color: #f39c12; font-size: 0.9rem; margin-bottom: 10px; letter-spacing: 2px; }
.hj-review-text {
    font-size: 0.88rem;
    color: var(--hj-text);
    line-height: 1.7;
    margin-bottom: 14px;
    font-style: italic;
}
.hj-review-author {
    display: flex;
    align-items: center;
    gap: 10px;
}
.hj-review-avatar {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: var(--hj-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 0.85rem;
    font-weight: 700;
}
.hj-review-name { font-size: 0.85rem; font-weight: 600; color: var(--hj-primary); }
.hj-review-date { font-size: 0.75rem; color: var(--hj-text-light); }

/* ===== FAQ ===== */
.hj-faq-list { max-width: 800px; margin: 0 auto; }
.hj-faq-item {
    background: var(--hj-white);
    border-radius: var(--hj-radius-sm);
    margin-bottom: 12px;
    box-shadow: var(--hj-shadow);
    overflow: hidden;
}
.hj-faq-question {
    padding: 18px 24px;
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--hj-primary);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--hj-transition);
}
.hj-faq-question:hover { background: rgba(15, 52, 96, 0.03); }
.hj-faq-question::after {
    content: '+';
    font-size: 1.3rem;
    color: var(--hj-accent);
    font-weight: 700;
    transition: var(--hj-transition);
}
.hj-faq-item.active .hj-faq-question::after { content: '-'; }
.hj-faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
}
.hj-faq-item.active .hj-faq-answer { max-height: 300px; }
.hj-faq-answer p {
    padding: 0 24px 18px;
    font-size: 0.88rem;
    color: var(--hj-text-light);
    line-height: 1.7;
}

/* ===== 联系我们 ===== */
.hj-contact-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}
.hj-contact-card {
    background: var(--hj-white);
    border-radius: var(--hj-radius);
    padding: 28px;
    text-align: center;
    box-shadow: var(--hj-shadow);
}
.hj-contact-card h3 {
    font-size: 1.05rem;
    color: var(--hj-primary);
    margin-bottom: 12px;
}
.hj-contact-card p {
    font-size: 0.88rem;
    color: var(--hj-text-light);
    line-height: 1.7;
}
.hj-contact-card img {
    max-width: 160px;
    margin: 12px auto 0;
    border-radius: var(--hj-radius-sm);
}

/* ===== 社交分享 ===== */
.hj-share-bar {
    display: flex;
    gap: 12px;
    justify-content: center;
    flex-wrap: wrap;
    margin-top: 20px;
}
.hj-share-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 18px;
    border-radius: 20px;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--hj-white);
    transition: var(--hj-transition);
}
.hj-share-btn:hover { transform: translateY(-2px); opacity: 0.9; color: var(--hj-white); }
.hj-share-wechat { background: #07c160; }
.hj-share-weibo { background: #e6162d; }
.hj-share-douyin { background: #161823; }
.hj-share-bilibili { background: #00a1d6; }

/* ===== 页脚 ===== */
.hj-footer {
    background: var(--hj-gradient);
    color: rgba(255,255,255,0.8);
    padding: 48px 0 0;
}
.hj-footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 36px;
    margin-bottom: 36px;
}
.hj-footer-brand .hj-logo { margin-bottom: 14px; }
.hj-footer-brand p { font-size: 0.85rem; line-height: 1.7; opacity: 0.8; }
.hj-footer h4 {
    font-size: 1rem;
    font-weight: 700;
    color: var(--hj-white);
    margin-bottom: 16px;
}
.hj-footer-links a {
    display: block;
    color: rgba(255,255,255,0.7);
    font-size: 0.85rem;
    padding: 4px 0;
    transition: var(--hj-transition);
}
.hj-footer-links a:hover { color: var(--hj-accent); padding-left: 4px; }
.hj-footer-qr { display: flex; gap: 16px; }
.hj-footer-qr img { width: 100px; border-radius: 6px; }
.hj-footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding: 18px 0;
    text-align: center;
    font-size: 0.82rem;
    opacity: 0.7;
}

/* ===== 内页通用 ===== */
.hj-page-hero {
    background: var(--hj-gradient);
    padding: 50px 0;
    text-align: center;
    color: var(--hj-white);
}
.hj-page-hero h1 {
    font-size: 2.2rem;
    font-weight: 800;
    margin-bottom: 12px;
}
.hj-page-hero p {
    font-size: 1rem;
    opacity: 0.85;
    max-width: 600px;
    margin: 0 auto;
}
.hj-page-content {
    padding: 40px 0;
}
.hj-page-content p {
    font-size: 0.95rem;
    line-height: 1.8;
    margin-bottom: 16px;
    color: var(--hj-text);
}
.hj-page-content h2 {
    font-size: 1.5rem;
    color: var(--hj-primary);
    margin: 28px 0 14px;
    font-weight: 700;
}
.hj-page-content h3 {
    font-size: 1.2rem;
    color: var(--hj-secondary);
    margin: 20px 0 10px;
    font-weight: 600;
}

/* ===== How-To指南 ===== */
.hj-howto-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    counter-reset: step;
}
.hj-howto-step {
    background: var(--hj-white);
    border-radius: var(--hj-radius);
    padding: 24px 20px;
    text-align: center;
    box-shadow: var(--hj-shadow);
    position: relative;
    counter-increment: step;
}
.hj-howto-step::before {
    content: counter(step);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--hj-gradient-accent);
    color: white;
    border-radius: 50%;
    font-weight: 700;
    font-size: 1.1rem;
    margin: 0 auto 14px;
}
.hj-howto-step h4 {
    font-size: 0.95rem;
    color: var(--hj-primary);
    margin-bottom: 8px;
}
.hj-howto-step p {
    font-size: 0.82rem;
    color: var(--hj-text-light);
}

/* ===== 数据统计条 ===== */
.hj-stats {
    background: var(--hj-gradient);
    padding: 40px 0;
}
.hj-stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    text-align: center;
    color: var(--hj-white);
}
.hj-stat-num {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--hj-accent);
    margin-bottom: 4px;
}
.hj-stat-label {
    font-size: 0.88rem;
    opacity: 0.8;
}

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
    .hj-video-grid { grid-template-columns: repeat(3, 1fr); }
    .hj-category-grid { grid-template-columns: repeat(3, 1fr); }
    .hj-expert-grid { grid-template-columns: repeat(2, 1fr); }
    .hj-review-grid { grid-template-columns: repeat(2, 1fr); }
    .hj-footer-grid { grid-template-columns: repeat(2, 1fr); }
    .hj-stats-grid { grid-template-columns: repeat(2, 1fr); gap: 24px; }
    .hj-howto-steps { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
    .hj-nav { 
        display: none;
        position: absolute;
        top: 68px;
        left: 0;
        right: 0;
        background: var(--hj-primary);
        flex-direction: column;
        padding: 16px;
        gap: 4px;
    }
    .hj-nav.open { display: flex; }
    .hj-nav a { padding: 12px 16px; }
    .hj-mobile-toggle { display: flex; }
    .hj-hero { height: 420px; }
    .hj-hero h1 { font-size: 1.8rem; }
    .hj-hero p { font-size: 0.95rem; }
    .hj-video-grid { grid-template-columns: repeat(2, 1fr); }
    .hj-category-grid { grid-template-columns: repeat(2, 1fr); }
    .hj-expert-grid { grid-template-columns: 1fr; }
    .hj-review-grid { grid-template-columns: 1fr; }
    .hj-contact-grid { grid-template-columns: 1fr; }
    .hj-footer-grid { grid-template-columns: 1fr; }
    .hj-section { padding: 40px 0; }
    .hj-section-header h2 { font-size: 1.5rem; }
    .hj-page-hero h1 { font-size: 1.6rem; }
    .hj-howto-steps { grid-template-columns: 1fr; }
    .hj-stats-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
    .hj-video-grid { grid-template-columns: 1fr; }
    .hj-category-grid { grid-template-columns: 1fr; }
    .hj-hero { height: 360px; }
    .hj-hero h1 { font-size: 1.5rem; }
    .hj-stats-grid { grid-template-columns: 1fr; }
}