/* ============================================
   精东 - 影视传媒视频社区 全站样式
   原创设计 | zhqnjso.cn
   ============================================ */

/* === CSS Variables === */
:root {
  --primary: #1A0A2E;
  --secondary: #FF6B35;
  --accent: #7B2FBE;
  --bg-dark: #0D0D1A;
  --text-light: #E8E6F0;
  --card-bg: #1E1533;
  --gradient-start: #FF6B35;
  --gradient-end: #FF3CAC;
  --border-color: #2A1F3D;
  --text-muted: #9B8FB5;
  --success: #00D4AA;
  --warning: #FFB800;
}

/* === Reset & Base === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", "WenQuanYi Micro Hei", sans-serif;
  background-color: var(--bg-dark);
  color: var(--text-light);
  line-height: 1.7;
  overflow-x: hidden;
}
a { color: var(--secondary); text-decoration: none; transition: color 0.3s; }
a:hover { color: var(--gradient-end); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
h1, h2, h3, h4, h5, h6 { line-height: 1.3; font-weight: 700; }

/* === Utility === */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.section-title {
  text-align: center;
  margin-bottom: 40px;
  font-size: 2rem;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.section-subtitle {
  text-align: center;
  color: var(--text-muted);
  margin-top: -30px;
  margin-bottom: 40px;
  font-size: 0.95rem;
}
.btn-primary {
  display: inline-block;
  padding: 12px 32px;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  color: #fff;
  border: none;
  border-radius: 30px;
  font-size: 1rem;
  cursor: pointer;
  transition: transform 0.3s, box-shadow 0.3s;
  text-align: center;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 25px rgba(255, 107, 53, 0.4);
  color: #fff;
}
.btn-outline {
  display: inline-block;
  padding: 10px 28px;
  border: 2px solid var(--secondary);
  color: var(--secondary);
  border-radius: 30px;
  font-size: 0.95rem;
  cursor: pointer;
  transition: all 0.3s;
}
.btn-outline:hover {
  background: var(--secondary);
  color: #fff;
}
.gradient-text {
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* === Header / Navigation === */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(13, 13, 26, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-color);
  transition: background 0.3s;
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 20px;
  max-width: 1200px;
  margin: 0 auto;
}
.logo-wrap { display: flex; align-items: center; gap: 10px; }
.logo-wrap img { height: 40px; width: auto; }
.logo-wrap .brand-name {
  font-size: 1.3rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.main-nav { display: flex; align-items: center; gap: 0; }
.main-nav a {
  color: var(--text-light);
  padding: 8px 16px;
  font-size: 0.95rem;
  position: relative;
  transition: color 0.3s;
}
.main-nav a:hover, .main-nav a.active {
  color: var(--secondary);
}
.main-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 2px;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  transition: width 0.3s;
}
.main-nav a:hover::after, .main-nav a.active::after { width: 60%; }
.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 5px;
}
.mobile-toggle span {
  width: 25px;
  height: 2px;
  background: var(--text-light);
  transition: all 0.3s;
}

/* === Search Bar === */
.search-bar-wrap {
  background: var(--primary);
  padding: 15px 0;
  border-bottom: 1px solid var(--border-color);
  margin-top: 65px;
}
.search-bar {
  display: flex;
  max-width: 680px;
  margin: 0 auto;
  position: relative;
}
.search-bar input {
  flex: 1;
  padding: 12px 20px;
  border: 2px solid var(--border-color);
  border-radius: 30px 0 0 30px;
  background: var(--card-bg);
  color: var(--text-light);
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.3s;
}
.search-bar input:focus { border-color: var(--secondary); }
.search-bar input::placeholder { color: var(--text-muted); }
.search-bar button {
  padding: 12px 28px;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  color: #fff;
  border: none;
  border-radius: 0 30px 30px 0;
  font-size: 0.95rem;
  cursor: pointer;
  transition: opacity 0.3s;
}
.search-bar button:hover { opacity: 0.9; }
.search-tags {
  display: flex;
  justify-content: center;
  gap: 10px;
  margin-top: 10px;
  flex-wrap: wrap;
}
.search-tags a {
  color: var(--text-muted);
  font-size: 0.82rem;
  padding: 4px 12px;
  border: 1px solid var(--border-color);
  border-radius: 15px;
  transition: all 0.3s;
}
.search-tags a:hover {
  color: var(--secondary);
  border-color: var(--secondary);
}

/* === Hero Section === */
.hero-section {
  position: relative;
  min-height: 520px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  top: 0; left: 0; width: 100%; height: 100%;
  background-size: cover;
  background-position: center;
  filter: brightness(0.35);
}
.hero-content {
  position: relative;
  z-index: 2;
  padding: 40px 20px;
}
.hero-content h1 {
  font-size: 2.8rem;
  margin-bottom: 16px;
  text-shadow: 0 2px 20px rgba(0,0,0,0.5);
}
.hero-content p {
  font-size: 1.15rem;
  color: var(--text-muted);
  margin-bottom: 30px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}
.hero-stats {
  display: flex;
  justify-content: center;
  gap: 50px;
  margin-top: 35px;
}
.hero-stats .stat-item { text-align: center; }
.hero-stats .stat-num {
  font-size: 2rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-stats .stat-label { font-size: 0.85rem; color: var(--text-muted); }

/* === Video Card === */
.video-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.video-card {
  background: var(--card-bg);
  border-radius: 12px;
  overflow: hidden;
  transition: transform 0.3s, box-shadow 0.3s;
  border: 1px solid var(--border-color);
}
.video-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 12px 35px rgba(123, 47, 190, 0.2);
}
.video-thumb {
  position: relative;
  padding-top: 56.25%;
  overflow: hidden;
}
.video-thumb img {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform 0.4s;
}
.video-card:hover .video-thumb img { transform: scale(1.05); }
.video-play-btn {
  position: absolute;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  width: 56px; height: 56px;
  background: rgba(255, 107, 53, 0.85);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity 0.3s;
  z-index: 3;
}
.video-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 .video-play-btn { opacity: 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; }
.video-info h3 {
  font-size: 0.95rem;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.4;
}
.video-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-muted);
  font-size: 0.82rem;
}
.video-meta span { display: flex; align-items: center; gap: 4px; }

/* === Section Spacing === */
.section { padding: 70px 0; }
.section-alt { background: var(--primary); }

/* === Module Grid (3 cols) === */
.module-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.module-card {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 30px;
  border: 1px solid var(--border-color);
  transition: transform 0.3s, border-color 0.3s;
  text-align: center;
}
.module-card:hover {
  transform: translateY(-4px);
  border-color: var(--secondary);
}
.module-icon {
  width: 60px; height: 60px;
  margin: 0 auto 18px;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
}
.module-card h3 { font-size: 1.1rem; margin-bottom: 10px; }
.module-card p { color: var(--text-muted); font-size: 0.9rem; }

/* === Expert Cards === */
.expert-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.expert-card {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 28px 20px;
  text-align: center;
  border: 1px solid var(--border-color);
  transition: transform 0.3s;
}
.expert-card:hover { transform: translateY(-4px); }
.expert-avatar {
  width: 100px; height: 100px;
  border-radius: 50%;
  margin: 0 auto 16px;
  overflow: hidden;
  border: 3px solid var(--secondary);
}
.expert-avatar img { width: 100%; height: 100%; object-fit: cover; }
.expert-card h3 { font-size: 1.05rem; margin-bottom: 4px; }
.expert-card .expert-role { color: var(--secondary); font-size: 0.85rem; margin-bottom: 10px; }
.expert-card p { color: var(--text-muted); font-size: 0.85rem; margin-bottom: 14px; }
.expert-actions { display: flex; gap: 10px; justify-content: center; }
.expert-actions a {
  padding: 6px 16px;
  border-radius: 20px;
  font-size: 0.82rem;
  border: 1px solid var(--secondary);
  color: var(--secondary);
  transition: all 0.3s;
}
.expert-actions a:hover { background: var(--secondary); color: #fff; }

/* === Partner Logos === */
.partner-logos {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 40px;
  flex-wrap: wrap;
  padding: 20px 0;
}
.partner-logos .partner-item {
  width: 140px;
  height: 70px;
  background: var(--card-bg);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-color);
  font-size: 0.9rem;
  color: var(--text-muted);
  font-weight: 600;
  transition: border-color 0.3s;
}
.partner-logos .partner-item:hover { border-color: var(--secondary); }

/* === FAQ Section === */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  background: var(--card-bg);
  border-radius: 10px;
  margin-bottom: 12px;
  border: 1px solid var(--border-color);
  overflow: hidden;
}
.faq-question {
  padding: 18px 24px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
  transition: color 0.3s;
}
.faq-question:hover { color: var(--secondary); }
.faq-question .faq-toggle {
  font-size: 1.3rem;
  transition: transform 0.3s;
  color: var(--secondary);
}
.faq-answer {
  padding: 0 24px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
  color: var(--text-muted);
  font-size: 0.92rem;
}
.faq-item.active .faq-answer {
  max-height: 300px;
  padding: 0 24px 18px;
}
.faq-item.active .faq-toggle { transform: rotate(45deg); }

/* === Reviews === */
.review-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.review-card {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 24px;
  border: 1px solid var(--border-color);
}
.review-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 12px;
}
.review-avatar {
  width: 44px; height: 44px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1.1rem;
  color: #fff;
}
.review-name { font-weight: 600; font-size: 0.95rem; }
.review-date { color: var(--text-muted); font-size: 0.8rem; }
.review-stars { color: var(--warning); font-size: 0.9rem; margin-bottom: 8px; }
.review-text { color: var(--text-muted); font-size: 0.9rem; line-height: 1.6; }

/* === Contact Section === */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.contact-card {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 28px;
  text-align: center;
  border: 1px solid var(--border-color);
}
.contact-card h3 { font-size: 1.05rem; margin-bottom: 14px; color: var(--secondary); }
.contact-card p { color: var(--text-muted); font-size: 0.9rem; margin-bottom: 6px; }
.contact-card img { max-width: 180px; margin: 10px auto; border-radius: 8px; }

/* === How-To Guide === */
.howto-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 900px;
  margin: 0 auto;
}
.howto-step {
  text-align: center;
  padding: 24px 16px;
  background: var(--card-bg);
  border-radius: 12px;
  border: 1px solid var(--border-color);
}
.step-num {
  width: 44px; height: 44px;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 12px;
  font-weight: 800;
  font-size: 1.2rem;
}
.howto-step h4 { font-size: 0.95rem; margin-bottom: 8px; }
.howto-step p { color: var(--text-muted); font-size: 0.82rem; }

/* === Social Share === */
.social-share {
  display: flex;
  justify-content: center;
  gap: 16px;
  margin-top: 20px;
}
.social-share a {
  width: 44px; height: 44px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  color: var(--text-light);
  font-size: 0.85rem;
  font-weight: 700;
  transition: all 0.3s;
}
.social-share a:hover {
  background: var(--secondary);
  border-color: var(--secondary);
  color: #fff;
}

/* === Footer === */
.site-footer {
  background: var(--primary);
  border-top: 1px solid var(--border-color);
  padding: 50px 0 20px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 30px;
  margin-bottom: 30px;
}
.footer-brand .brand-name {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 10px;
  background: linear-gradient(135deg, var(--gradient-start), var(--gradient-end));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.footer-brand p { color: var(--text-muted); font-size: 0.88rem; margin-bottom: 14px; }
.footer-col h4 {
  font-size: 1rem;
  margin-bottom: 16px;
  color: var(--text-light);
}
.footer-col a {
  display: block;
  color: var(--text-muted);
  font-size: 0.88rem;
  padding: 4px 0;
  transition: color 0.3s;
}
.footer-col a:hover { color: var(--secondary); }
.footer-qr {
  display: flex;
  gap: 16px;
  margin-top: 10px;
}
.footer-qr img { width: 100px; border-radius: 6px; }
.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding-top: 20px;
  text-align: center;
  color: var(--text-muted);
  font-size: 0.82rem;
}
.footer-bottom a { color: var(--text-muted); }

/* === Breadcrumb === */
.breadcrumb {
  padding: 14px 0;
  font-size: 0.85rem;
  color: var(--text-muted);
}
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--secondary); }
.breadcrumb span { margin: 0 8px; }

/* === Inner Page Banner === */
.page-banner {
  position: relative;
  height: 300px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
}
.page-banner .banner-bg {
  position: absolute;
  top: 0; left: 0; width: 100%; height: 100%;
  background-size: cover;
  background-position: center;
  filter: brightness(0.3);
}
.page-banner .banner-content {
  position: relative;
  z-index: 2;
}
.page-banner h1 { font-size: 2.2rem; margin-bottom: 10px; }
.page-banner p { color: var(--text-muted); font-size: 1rem; }

/* === Tag Cloud === */
.tag-cloud { display: flex; flex-wrap: wrap; gap: 8px; justify-content: center; }
.tag-cloud a {
  padding: 6px 16px;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: 20px;
  color: var(--text-muted);
  font-size: 0.82rem;
  transition: all 0.3s;
}
.tag-cloud a:hover {
  border-color: var(--secondary);
  color: var(--secondary);
}

/* === Responsive === */
@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); }
  .howto-steps { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .mobile-toggle { display: flex; }
  .main-nav {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    width: 100%;
    background: rgba(13, 13, 26, 0.98);
    flex-direction: column;
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
  }
  .main-nav.active { display: flex; }
  .main-nav a { padding: 12px 24px; }
  .video-grid { grid-template-columns: repeat(2, 1fr); }
  .module-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .review-grid { grid-template-columns: 1fr; }
  .hero-content h1 { font-size: 1.8rem; }
  .hero-stats { gap: 25px; }
  .hero-stats .stat-num { font-size: 1.5rem; }
  .section-title { font-size: 1.5rem; }
  .footer-grid { grid-template-columns: 1fr; }
  .expert-grid { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .video-grid { grid-template-columns: 1fr; }
  .howto-steps { grid-template-columns: 1fr; }
  .hero-stats { flex-direction: column; gap: 15px; }
}

/* === Lazy Load === */
img[loading="lazy"] { opacity: 0; transition: opacity 0.5s; }
img[loading="lazy"].loaded, img[loading="lazy"][src] { opacity: 1; }

/* === Animation === */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}
.animate-in { animation: fadeInUp 0.6s ease forwards; }

/* === Video Overlay for inner pages === */
.video-overlay {
  position: absolute;
  top: 0; left: 0; width: 100%; height: 100%;
  background: linear-gradient(180deg, transparent 50%, rgba(13,13,26,0.8) 100%);
  z-index: 1;
}

/* === Sidebar for inner pages === */
.page-layout {
  display: grid;
  grid-template-columns: 1fr 300px;
  gap: 30px;
}
.sidebar-widget {
  background: var(--card-bg);
  border-radius: 12px;
  padding: 20px;
  margin-bottom: 20px;
  border: 1px solid var(--border-color);
}
.sidebar-widget h3 {
  font-size: 1rem;
  margin-bottom: 14px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--border-color);
}
@media (max-width: 768px) {
  .page-layout { grid-template-columns: 1fr; }
}