/* ============================================
   小蓝导航 影视传媒视频社区 - 斗罗大陆风格
   原创配色：深靛蓝 #0b0d2e + 魂环紫 #9b59f0 + 灵力金 #f0c040
   域名：ztnLxz.cn
   ============================================ */

/* === 基础重置与变量 === */
:root {
  --bg-deep: #0b0d2e;
  --bg-card: #131640;
  --bg-card-hover: #1a1e55;
  --accent-purple: #9b59f0;
  --accent-gold: #f0c040;
  --accent-cyan: #40e0d0;
  --text-main: #e8e6f0;
  --text-muted: #9a96b8;
  --text-bright: #ffffff;
  --border-glow: rgba(155, 89, 240, 0.3);
  --shadow-purple: rgba(155, 89, 240, 0.15);
  --gradient-hero: linear-gradient(135deg, #0b0d2e 0%, #1a1060 50%, #2d1b69 100%);
  --gradient-card: linear-gradient(145deg, #131640 0%, #1a1e55 100%);
  --gradient-accent: linear-gradient(90deg, #9b59f0, #f0c040);
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: 'PingFang SC', 'Microsoft YaHei', 'Hiragino Sans GB', sans-serif;
  background: var(--bg-deep);
  color: var(--text-main);
  line-height: 1.75;
  overflow-x: hidden;
}

a { color: var(--accent-purple); text-decoration: none; transition: var(--transition); }
a:hover { color: var(--accent-gold); }

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

.container { max-width: 1240px; margin: 0 auto; padding: 0 20px; }

/* === 隐藏干扰标签 === */
.d-none { display: none !important; }

/* === 顶部导航 === */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(11, 13, 46, 0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-glow);
  padding: 0 24px;
  height: 68px;
}

.header-inner {
  max-width: 1240px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  height: 68px;
}

.site-logo { display: flex; align-items: center; gap: 10px; }
.site-logo img { height: 44px; width: auto; }
.site-logo span {
  font-size: 1.35rem; font-weight: 700;
  background: var(--gradient-accent);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}

.main-nav { display: flex; gap: 6px; }
.main-nav a {
  color: var(--text-main); padding: 8px 14px;
  border-radius: var(--radius-sm); font-size: 0.92rem;
  transition: var(--transition); position: relative;
}
.main-nav a:hover, .main-nav a.active {
  color: var(--accent-gold);
  background: rgba(155, 89, 240, 0.12);
}
.main-nav a.active::after {
  content: ''; position: absolute; bottom: 2px; left: 50%; transform: translateX(-50%);
  width: 20px; height: 2px; background: var(--accent-gold); border-radius: 1px;
}

.nav-toggle { display: none; background: none; border: none; color: var(--text-main); font-size: 1.5rem; cursor: pointer; }

/* === Banner区域 === */
.hero-banner {
  position: relative; margin-top: 68px;
  min-height: 520px; overflow: hidden;
  display: flex; align-items: center; justify-content: center;
}

.hero-banner .bg-img {
  position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: cover; object-position: center;
}

.hero-banner .overlay {
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(11,13,46,0.5) 0%, rgba(11,13,46,0.85) 100%);
}

.hero-content {
  position: relative; z-index: 2; text-align: center;
  padding: 60px 20px; max-width: 800px;
}

.hero-content h1 {
  font-size: 2.8rem; font-weight: 800; margin-bottom: 16px;
  background: var(--gradient-accent);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
  text-shadow: none;
}

.hero-content .subtitle {
  font-size: 1.15rem; color: var(--text-muted);
  margin-bottom: 28px; line-height: 1.8;
}

.hero-search {
  display: flex; max-width: 520px; margin: 0 auto;
  border-radius: 50px; overflow: hidden;
  border: 2px solid var(--accent-purple);
  background: rgba(19, 22, 64, 0.9);
}

.hero-search input {
  flex: 1; border: none; background: transparent;
  padding: 14px 22px; color: var(--text-main); font-size: 1rem;
  outline: none;
}

.hero-search input::placeholder { color: var(--text-muted); }

.hero-search button {
  background: var(--gradient-accent); border: none;
  padding: 14px 28px; color: #0b0d2e; font-weight: 700;
  cursor: pointer; font-size: 1rem; transition: var(--transition);
}

.hero-search button:hover { opacity: 0.85; }

/* === 通用区块 === */
.section { padding: 60px 0; }
.section-alt { background: rgba(19, 22, 64, 0.5); }

.section-header {
  text-align: center; margin-bottom: 44px;
}

.section-header h2 {
  font-size: 2rem; font-weight: 700; margin-bottom: 10px;
  color: var(--text-bright);
}

.section-header h2 .hl {
  background: var(--gradient-accent);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-header p {
  color: var(--text-muted); font-size: 1rem; max-width: 600px; margin: 0 auto;
}

/* === 视频卡片网格 === */
.video-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.video-card {
  background: var(--gradient-card);
  border-radius: var(--radius-md);
  overflow: hidden;
  border: 1px solid transparent;
  transition: var(--transition);
  cursor: pointer;
}

.video-card:hover {
  transform: translateY(-6px);
  border-color: var(--accent-purple);
  box-shadow: 0 12px 36px var(--shadow-purple);
}

.video-thumb {
  position: relative; padding-top: 56.25%; overflow: hidden;
}

.video-thumb img {
  position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: cover; transition: transform 0.5s ease;
}

.video-card:hover .video-thumb img { transform: scale(1.08); }

.play-btn {
  position: absolute; top: 50%; left: 50%;
  transform: translate(-50%, -50%) scale(0);
  width: 56px; height: 56px;
  background: rgba(155, 89, 240, 0.9);
  border-radius: 50%; display: flex; align-items: center; justify-content: center;
  transition: var(--transition); z-index: 3;
}

.play-btn::after {
  content: ''; width: 0; height: 0;
  border-style: solid; border-width: 10px 0 10px 18px;
  border-color: transparent transparent transparent #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;
  padding: 2px 8px; border-radius: 4px; font-size: 0.78rem;
}

.video-info { padding: 14px 16px; }

.video-info h3 {
  font-size: 0.95rem; font-weight: 600; color: var(--text-bright);
  margin-bottom: 6px; line-height: 1.45;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden;
}

.video-meta {
  display: flex; gap: 12px; font-size: 0.8rem; color: var(--text-muted);
}

.video-meta .author { color: var(--accent-purple); }

.video-tag {
  display: inline-block; padding: 2px 10px; margin: 4px 4px 0 0;
  background: rgba(155, 89, 240, 0.12); color: var(--accent-purple);
  border-radius: 20px; font-size: 0.75rem;
}

/* === 模块卡片（传媒/娱乐/AI） === */
.module-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}

.module-card {
  background: var(--gradient-card);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-md);
  padding: 30px 24px; text-align: center;
  transition: var(--transition);
}

.module-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent-purple);
  box-shadow: 0 8px 32px var(--shadow-purple);
}

.module-icon {
  width: 60px; height: 60px; margin: 0 auto 16px;
  background: rgba(155, 89, 240, 0.15);
  border-radius: 50%; display: flex; align-items: center; justify-content: center;
  font-size: 1.6rem;
}

.module-card h3 {
  font-size: 1.1rem; color: var(--text-bright); margin-bottom: 10px;
}

.module-card p {
  font-size: 0.88rem; color: var(--text-muted); line-height: 1.7;
}

/* === 专家团队 === */
.expert-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px;
}

.expert-card {
  background: var(--gradient-card);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-md);
  padding: 28px 20px; text-align: center;
  transition: var(--transition);
}

.expert-card:hover {
  border-color: var(--accent-gold);
  box-shadow: 0 8px 28px rgba(240, 192, 64, 0.12);
}

.expert-avatar {
  width: 90px; height: 90px; border-radius: 50%; margin: 0 auto 14px;
  overflow: hidden; border: 3px solid var(--accent-purple);
}

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

.expert-card h4 {
  font-size: 1.05rem; color: var(--text-bright); margin-bottom: 4px;
}

.expert-card .role {
  font-size: 0.82rem; color: var(--accent-gold); margin-bottom: 8px;
}

.expert-card .bio {
  font-size: 0.82rem; color: var(--text-muted); line-height: 1.6;
}

.expert-works { margin-top: 10px; font-size: 0.78rem; color: var(--accent-cyan); }

/* === FAQ折叠 === */
.faq-list { max-width: 800px; margin: 0 auto; }

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-md);
  margin-bottom: 12px; overflow: hidden;
}

.faq-q {
  padding: 18px 22px; cursor: pointer;
  display: flex; justify-content: space-between; align-items: center;
  font-weight: 600; color: var(--text-bright); font-size: 0.98rem;
  transition: var(--transition);
}

.faq-q:hover { color: var(--accent-gold); }

.faq-q .arrow {
  transition: transform 0.3s; font-size: 0.8rem; color: var(--accent-purple);
}

.faq-item.open .faq-q .arrow { transform: rotate(180deg); }

.faq-a {
  max-height: 0; overflow: hidden; transition: max-height 0.4s ease;
  padding: 0 22px; color: var(--text-muted); font-size: 0.9rem; line-height: 1.8;
}

.faq-item.open .faq-a { max-height: 400px; padding-bottom: 18px; }

/* === 用户评论 === */
.review-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px;
}

.review-card {
  background: var(--gradient-card);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-md);
  padding: 24px;
}

.review-header {
  display: flex; align-items: center; gap: 12px; margin-bottom: 12px;
}

.review-avatar {
  width: 44px; height: 44px; border-radius: 50%;
  background: var(--accent-purple); display: flex; align-items: center; justify-content: center;
  color: #fff; font-weight: 700; font-size: 1.1rem;
}

.review-name { font-weight: 600; color: var(--text-bright); font-size: 0.95rem; }
.review-date { font-size: 0.78rem; color: var(--text-muted); }

.review-stars { color: var(--accent-gold); margin-bottom: 8px; font-size: 0.9rem; }

.review-text { font-size: 0.9rem; color: var(--text-muted); line-height: 1.75; }

/* === 合作伙伴 === */
.partner-logos {
  display: flex; flex-wrap: wrap; justify-content: center; gap: 36px;
  padding: 20px 0;
}

.partner-logos span {
  font-size: 1.1rem; color: var(--text-muted);
  padding: 12px 24px; border: 1px solid var(--border-glow);
  border-radius: var(--radius-sm); transition: var(--transition);
}

.partner-logos span:hover { border-color: var(--accent-purple); color: var(--accent-purple); }

/* === 面包屑 === */
.breadcrumb {
  padding: 16px 0; font-size: 0.85rem; color: var(--text-muted);
  margin-top: 68px;
}

.breadcrumb a { color: var(--accent-purple); }
.breadcrumb a:hover { color: var(--accent-gold); }
.breadcrumb .sep { margin: 0 8px; color: var(--text-muted); }

/* === 内页布局 === */
.page-layout {
  display: grid; grid-template-columns: 1fr 300px; gap: 30px;
  padding: 30px 0 60px;
}

.page-main h2 {
  font-size: 1.6rem; color: var(--text-bright); margin-bottom: 16px;
}

.page-main h3 {
  font-size: 1.2rem; color: var(--accent-gold); margin: 24px 0 12px;
}

.page-main p {
  margin-bottom: 14px; color: var(--text-main); line-height: 1.8;
}

.sidebar { position: sticky; top: 88px; }

.sidebar-block {
  background: var(--gradient-card);
  border: 1px solid var(--border-glow);
  border-radius: var(--radius-md);
  padding: 20px; margin-bottom: 20px;
}

.sidebar-block h4 {
  font-size: 1rem; color: var(--accent-gold); margin-bottom: 14px;
  padding-bottom: 10px; border-bottom: 1px solid var(--border-glow);
}

.sidebar-block ul { list-style: none; }
.sidebar-block li {
  padding: 8px 0; border-bottom: 1px solid rgba(155,89,240,0.08);
  font-size: 0.88rem;
}
.sidebar-block li:last-child { border-bottom: none; }
.sidebar-block li a { color: var(--text-muted); }
.sidebar-block li a:hover { color: var(--accent-purple); }

/* === 页脚 === */
.site-footer {
  background: #080a22;
  border-top: 1px solid var(--border-glow);
  padding: 48px 0 24px;
}

.footer-grid {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 36px;
  margin-bottom: 36px;
}

.footer-brand .logo-text {
  font-size: 1.4rem; font-weight: 700;
  background: var(--gradient-accent);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 10px;
}

.footer-brand p { font-size: 0.85rem; color: var(--text-muted); line-height: 1.7; }

.footer-col h5 {
  font-size: 0.95rem; color: var(--text-bright); margin-bottom: 14px;
  position: relative; padding-bottom: 8px;
}

.footer-col h5::after {
  content: ''; position: absolute; bottom: 0; left: 0;
  width: 30px; height: 2px; background: var(--accent-purple);
}

.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 8px; }
.footer-col a { color: var(--text-muted); font-size: 0.85rem; }
.footer-col a:hover { color: var(--accent-gold); }

.footer-bottom {
  text-align: center; padding-top: 24px;
  border-top: 1px solid rgba(155,89,240,0.1);
  font-size: 0.82rem; color: var(--text-muted);
}

.footer-bottom a { color: var(--accent-purple); }

/* === 回到顶部 === */
.back-top {
  position: fixed; bottom: 30px; right: 30px;
  width: 46px; height: 46px; border-radius: 50%;
  background: var(--accent-purple); color: #fff;
  display: none; align-items: center; justify-content: center;
  font-size: 1.2rem; cursor: pointer; z-index: 999;
  box-shadow: 0 4px 16px var(--shadow-purple);
  transition: var(--transition);
}

.back-top:hover { background: var(--accent-gold); color: #0b0d2e; }
.back-top.show { display: flex; }

/* === 联系表单 === */
.contact-form { max-width: 600px; }

.form-group { margin-bottom: 18px; }

.form-group label {
  display: block; margin-bottom: 6px;
  font-size: 0.9rem; color: var(--text-bright); font-weight: 600;
}

.form-group input, .form-group textarea, .form-group select {
  width: 100%; padding: 12px 16px;
  background: var(--bg-card); border: 1px solid var(--border-glow);
  border-radius: var(--radius-sm); color: var(--text-main);
  font-size: 0.92rem; outline: none; transition: var(--transition);
}

.form-group input:focus, .form-group textarea:focus {
  border-color: var(--accent-purple);
  box-shadow: 0 0 0 3px var(--shadow-purple);
}

.form-group textarea { min-height: 120px; resize: vertical; }

.btn-submit {
  background: var(--gradient-accent); border: none;
  padding: 14px 36px; color: #0b0d2e; font-weight: 700;
  font-size: 1rem; border-radius: 50px; cursor: pointer;
  transition: var(--transition);
}

.btn-submit:hover { opacity: 0.85; transform: translateY(-2px); }

/* === 标签云 === */
.tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
.tag-cloud a {
  display: inline-block; padding: 5px 14px;
  background: rgba(155, 89, 240, 0.1); color: var(--accent-purple);
  border-radius: 20px; font-size: 0.82rem; border: 1px solid transparent;
  transition: var(--transition);
}
.tag-cloud a:hover { border-color: var(--accent-purple); background: rgba(155, 89, 240, 0.2); }

/* === 数据统计条 === */
.stats-bar {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
  padding: 40px 0;
}

.stat-item { text-align: center; }

.stat-num {
  font-size: 2.2rem; font-weight: 800;
  background: var(--gradient-accent);
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label { font-size: 0.88rem; color: var(--text-muted); margin-top: 4px; }

/* === 响应式 === */
@media (max-width: 1024px) {
  .video-grid { grid-template-columns: repeat(3, 1fr); }
  .expert-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: repeat(2, 1fr); }
  .page-layout { grid-template-columns: 1fr; }
  .sidebar { position: static; }
}

@media (max-width: 768px) {
  .video-grid { grid-template-columns: repeat(2, 1fr); }
  .module-grid { grid-template-columns: 1fr; }
  .review-grid { grid-template-columns: 1fr; }
  .stats-bar { grid-template-columns: repeat(2, 1fr); }
  .hero-content h1 { font-size: 2rem; }
  .main-nav { display: none; flex-direction: column; position: absolute; top: 68px; left: 0; right: 0; background: rgba(11,13,46,0.98); padding: 16px; border-bottom: 1px solid var(--border-glow); }
  .main-nav.open { display: flex; }
  .nav-toggle { display: block; }
  .footer-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  .video-grid { grid-template-columns: 1fr; }
  .expert-grid { grid-template-columns: 1fr; }
  .hero-content h1 { font-size: 1.6rem; }
  .hero-banner { min-height: 400px; }
  .section { padding: 40px 0; }
}