/* ============================================
   黑料 - 黑料视频社区
   原创配色：午夜蓝 #1a1a3e + 琥珀金 #d4a843
   域名：js-hbsb.cn
   ============================================ */

/* === 基础重置与变量 === */
:root {
  --primary: #1a1a3e;
  --primary-light: #2d2d5e;
  --primary-dark: #0f0f28;
  --accent: #d4a843;
  --accent-light: #e8c76a;
  --accent-dark: #b8912e;
  --bg-main: #f5f3ef;
  --bg-card: #ffffff;
  --bg-dark: #121230;
  --text-main: #2c2c3a;
  --text-light: #6b6b80;
  --text-white: #f0f0f5;
  --border: #e0ddd6;
  --shadow: rgba(26,26,62,0.12);
  --radius: 10px;
  --transition: all 0.3s ease;
}

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

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  color: var(--text-main);
  background: var(--bg-main);
  line-height: 1.7;
  overflow-x: hidden;
}

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

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

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

/* === 干扰标签隐藏 === */
.noise-block { position: absolute; width: 0; height: 0; overflow: hidden; opacity: 0; pointer-events: none; z-index: -9999; }

/* === 顶部导航 === */
.site-header {
  background: var(--primary);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 20px rgba(0,0,0,0.3);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  max-width: 1200px;
  margin: 0 auto;
  height: 68px;
}

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

.site-logo img {
  height: 42px;
  width: auto;
  border-radius: 6px;
}

.site-logo span {
  font-size: 1.4rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 1px;
}

.main-nav { display: flex; align-items: center; gap: 0; }

.main-nav a {
  color: var(--text-white);
  padding: 22px 16px;
  font-size: 0.95rem;
  font-weight: 500;
  position: relative;
  transition: var(--transition);
}

.main-nav a:hover,
.main-nav a.active {
  color: var(--accent);
  background: rgba(212,168,67,0.1);
}

.main-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 3px;
  background: var(--accent);
  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: 8px;
}

.mobile-toggle span {
  width: 26px;
  height: 3px;
  background: var(--text-white);
  border-radius: 2px;
  transition: var(--transition);
}

/* === 搜索框 === */
.search-bar {
  background: var(--primary-light);
  padding: 12px 0;
  border-bottom: 1px solid rgba(212,168,67,0.2);
}

.search-bar .container { display: flex; justify-content: center; }

.search-wrapper {
  display: flex;
  max-width: 560px;
  width: 100%;
  background: rgba(255,255,255,0.08);
  border-radius: 30px;
  overflow: hidden;
  border: 1px solid rgba(212,168,67,0.3);
}

.search-wrapper input {
  flex: 1;
  border: none;
  background: transparent;
  padding: 10px 20px;
  color: var(--text-white);
  font-size: 0.9rem;
  outline: none;
}

.search-wrapper input::placeholder { color: rgba(240,240,245,0.5); }

.search-wrapper button {
  background: var(--accent);
  border: none;
  padding: 10px 24px;
  color: var(--primary);
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.search-wrapper button:hover { background: var(--accent-light); }

/* === Banner区域 === */
.hero-banner {
  position: relative;
  height: 520px;
  background-size: cover;
  background-position: center;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
}

.hero-banner::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(26,26,62,0.85) 0%, rgba(18,18,48,0.7) 50%, rgba(26,26,62,0.85) 100%);
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 750px;
  padding: 0 20px;
}

.hero-content h1 {
  font-size: 2.8rem;
  color: var(--accent);
  margin-bottom: 16px;
  text-shadow: 0 2px 10px rgba(0,0,0,0.4);
  font-weight: 800;
}

.hero-content p {
  font-size: 1.15rem;
  color: var(--text-white);
  margin-bottom: 28px;
  line-height: 1.8;
  opacity: 0.92;
}

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

.btn-gold {
  background: var(--accent);
  color: var(--primary);
  padding: 12px 32px;
  border-radius: 30px;
  font-weight: 600;
  font-size: 1rem;
  transition: var(--transition);
  display: inline-block;
  border: 2px solid var(--accent);
}

.btn-gold:hover {
  background: transparent;
  color: var(--accent);
}

.btn-outline {
  border: 2px solid var(--text-white);
  color: var(--text-white);
  padding: 12px 32px;
  border-radius: 30px;
  font-weight: 600;
  font-size: 1rem;
  transition: var(--transition);
  display: inline-block;
}

.btn-outline:hover {
  background: var(--text-white);
  color: var(--primary);
}

/* === 面包屑 === */
.breadcrumb {
  padding: 14px 0;
  font-size: 0.85rem;
  color: var(--text-light);
  border-bottom: 1px solid var(--border);
  background: var(--bg-card);
}

.breadcrumb a { color: var(--accent-dark); }
.breadcrumb span { margin: 0 6px; }

/* === 通用栏目标题 === */
.section-title {
  text-align: center;
  margin-bottom: 40px;
}

.section-title h2 {
  font-size: 2rem;
  color: var(--primary);
  margin-bottom: 10px;
  position: relative;
  display: inline-block;
}

.section-title h2::after {
  content: '';
  display: block;
  width: 60px;
  height: 4px;
  background: var(--accent);
  margin: 10px auto 0;
  border-radius: 2px;
}

.section-title p {
  color: var(--text-light);
  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(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 4px 16px var(--shadow);
  transition: var(--transition);
  position: relative;
}

.video-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 12px 32px rgba(26,26,62,0.2);
}

.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;
}

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

.play-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.8);
  width: 56px;
  height: 56px;
  background: rgba(212,168,67,0.9);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  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 var(--primary);
  margin-left: 3px;
}

.video-card:hover .play-btn {
  opacity: 1;
  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: 0.75rem;
  z-index: 2;
}

.video-info { padding: 14px; }

.video-info h3 {
  font-size: 0.95rem;
  color: var(--text-main);
  margin-bottom: 6px;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.video-meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-light);
}

.video-meta .views::before { content: '▶ '; }

.video-tags { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 8px; }

.video-tags span {
  background: rgba(212,168,67,0.12);
  color: var(--accent-dark);
  padding: 2px 10px;
  border-radius: 12px;
  font-size: 0.75rem;
}

/* === 服务模块（3列） === */
.service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.service-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 30px 24px;
  text-align: center;
  box-shadow: 0 4px 16px var(--shadow);
  transition: var(--transition);
  border-top: 4px solid transparent;
}

.service-card:hover {
  transform: translateY(-4px);
  border-top-color: var(--accent);
}

.service-icon {
  width: 64px;
  height: 64px;
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
  font-size: 1.6rem;
}

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

.service-card p {
  font-size: 0.9rem;
  color: var(--text-light);
  line-height: 1.6;
}

/* === AI赋能区域 === */
.ai-section {
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  padding: 70px 0;
  color: var(--text-white);
}

.ai-section .section-title h2 { color: var(--accent); }
.ai-section .section-title p { color: rgba(240,240,245,0.7); }

.ai-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.ai-card {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(212,168,67,0.2);
  border-radius: var(--radius);
  padding: 28px 22px;
  text-align: center;
  transition: var(--transition);
}

.ai-card:hover {
  background: rgba(212,168,67,0.1);
  border-color: var(--accent);
}

.ai-card h3 {
  color: var(--accent);
  font-size: 1.1rem;
  margin: 14px 0 10px;
}

.ai-card p {
  font-size: 0.88rem;
  color: rgba(240,240,245,0.75);
  line-height: 1.6;
}

/* === 社区功能 === */
.community-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.community-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 4px 16px var(--shadow);
  transition: var(--transition);
}

.community-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 28px rgba(26,26,62,0.18);
}

.community-card img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.community-card .card-body { padding: 18px; }

.community-card h3 {
  font-size: 1.05rem;
  color: var(--primary);
  margin-bottom: 8px;
}

.community-card p {
  font-size: 0.88rem;
  color: var(--text-light);
  line-height: 1.6;
}

.community-card .card-stats {
  display: flex;
  gap: 16px;
  margin-top: 10px;
  font-size: 0.8rem;
  color: var(--accent-dark);
}

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

.expert-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 28px 20px;
  text-align: center;
  box-shadow: 0 4px 16px var(--shadow);
  transition: var(--transition);
}

.expert-card:hover { transform: translateY(-4px); }

.expert-card img {
  width: 90px;
  height: 90px;
  border-radius: 50%;
  object-fit: cover;
  margin: 0 auto 14px;
  border: 3px solid var(--accent);
}

.expert-card h3 {
  font-size: 1.05rem;
  color: var(--primary);
  margin-bottom: 4px;
}

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

.expert-card p {
  font-size: 0.85rem;
  color: var(--text-light);
  line-height: 1.5;
  margin-bottom: 12px;
}

.expert-card .btn-sm {
  display: inline-block;
  padding: 6px 18px;
  background: var(--primary);
  color: var(--accent);
  border-radius: 20px;
  font-size: 0.82rem;
  transition: var(--transition);
}

.expert-card .btn-sm:hover {
  background: var(--accent);
  color: var(--primary);
}

/* === How-To指南 === */
.howto-section { background: var(--bg-card); padding: 60px 0; }

.howto-steps {
  display: flex;
  gap: 30px;
  justify-content: center;
  flex-wrap: wrap;
}

.howto-step {
  flex: 1;
  min-width: 200px;
  max-width: 260px;
  text-align: center;
}

.step-num {
  width: 50px;
  height: 50px;
  background: var(--accent);
  color: var(--primary);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  font-weight: 700;
  margin: 0 auto 14px;
}

.howto-step h4 {
  font-size: 1rem;
  color: var(--primary);
  margin-bottom: 8px;
}

.howto-step p {
  font-size: 0.85rem;
  color: var(--text-light);
}

/* === 合作品牌 === */
.partners-section { padding: 50px 0; }

.partner-logos {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 40px;
  flex-wrap: wrap;
  opacity: 0.6;
}

.partner-logos span {
  font-size: 1.2rem;
  color: var(--text-light);
  font-weight: 600;
  padding: 12px 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

/* === FAQ === */
.faq-section { padding: 60px 0; }

.faq-list { max-width: 800px; margin: 0 auto; }

.faq-item {
  background: var(--bg-card);
  border-radius: var(--radius);
  margin-bottom: 12px;
  box-shadow: 0 2px 10px var(--shadow);
  overflow: hidden;
}

.faq-question {
  padding: 18px 24px;
  font-weight: 600;
  color: var(--primary);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: var(--transition);
}

.faq-question:hover { background: rgba(212,168,67,0.06); }

.faq-question::after {
  content: '+';
  font-size: 1.4rem;
  color: var(--accent);
  transition: transform 0.3s;
}

.faq-item.active .faq-question::after {
  content: '−';
  transform: rotate(180deg);
}

.faq-answer {
  padding: 0 24px;
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s;
  color: var(--text-light);
  font-size: 0.92rem;
  line-height: 1.7;
}

.faq-item.active .faq-answer {
  max-height: 300px;
  padding: 0 24px 18px;
}

/* === 用户评论 === */
.reviews-section {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  padding: 60px 0;
}

.reviews-section .section-title h2 { color: var(--accent); }
.reviews-section .section-title p { color: rgba(240,240,245,0.7); }

.review-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.review-card {
  background: rgba(255,255,255,0.07);
  border: 1px solid rgba(212,168,67,0.15);
  border-radius: var(--radius);
  padding: 24px;
  transition: var(--transition);
}

.review-card:hover { border-color: var(--accent); }

.review-stars { color: var(--accent); font-size: 1rem; margin-bottom: 10px; }

.review-card p {
  font-size: 0.9rem;
  color: rgba(240,240,245,0.85);
  line-height: 1.6;
  margin-bottom: 14px;
  font-style: italic;
}

.review-author {
  font-size: 0.85rem;
  color: var(--accent);
  font-weight: 600;
}

/* === 联系我们 === */
.contact-section { padding: 60px 0; }

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 40px;
}

.contact-info h3 {
  font-size: 1.3rem;
  color: var(--primary);
  margin-bottom: 18px;
}

.contact-item {
  display: flex;
  gap: 12px;
  margin-bottom: 16px;
  align-items: flex-start;
}

.contact-item .label {
  font-weight: 600;
  color: var(--primary);
  min-width: 80px;
}

.contact-item .value { color: var(--text-light); }

.contact-qrcodes {
  display: flex;
  gap: 30px;
  justify-content: center;
  align-items: flex-start;
}

.qrcode-box { text-align: center; }

.qrcode-box img {
  width: 140px;
  height: 140px;
  border-radius: 8px;
  border: 2px solid var(--border);
}

.qrcode-box p {
  margin-top: 8px;
  font-size: 0.85rem;
  color: var(--text-light);
}

/* === 社交分享 === */
.share-bar {
  display: flex;
  gap: 12px;
  justify-content: center;
  padding: 20px 0;
}

.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 18px;
  border-radius: 20px;
  font-size: 0.85rem;
  color: #fff;
  transition: var(--transition);
}

.share-btn:hover { opacity: 0.85; color: #fff; }
.share-wechat { background: #07c160; }
.share-weibo { background: #e6162d; }
.share-douyin { background: #161823; }
.share-bilibili { background: #00a1d6; }

/* === 页脚 === */
.site-footer {
  background: var(--primary-dark);
  color: rgba(240,240,245,0.6);
  padding: 50px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 30px;
  padding-bottom: 30px;
  border-bottom: 1px solid rgba(240,240,245,0.1);
}

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

.footer-brand .footer-logo img {
  height: 36px;
  border-radius: 6px;
}

.footer-brand .footer-logo span {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--accent);
}

.footer-brand p {
  font-size: 0.88rem;
  line-height: 1.7;
  margin-bottom: 14px;
}

.footer-col h4 {
  color: var(--accent);
  font-size: 1rem;
  margin-bottom: 14px;
}

.footer-col a {
  display: block;
  color: rgba(240,240,245,0.6);
  font-size: 0.88rem;
  padding: 4px 0;
  transition: var(--transition);
}

.footer-col a:hover { color: var(--accent); padding-left: 4px; }

.footer-bottom {
  text-align: center;
  padding: 20px 0;
  font-size: 0.82rem;
  color: rgba(240,240,245,0.4);
}

/* === 内页通用 === */
.page-section { padding: 60px 0; }

.page-hero {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  padding: 50px 0;
  text-align: center;
  color: var(--text-white);
}

.page-hero h1 {
  font-size: 2.2rem;
  color: var(--accent);
  margin-bottom: 10px;
}

.page-hero p {
  font-size: 1.05rem;
  opacity: 0.8;
  max-width: 600px;
  margin: 0 auto;
}

/* === 标签筛选 === */
.tag-filter {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
  margin-bottom: 30px;
}

.tag-filter span {
  padding: 6px 18px;
  border-radius: 20px;
  font-size: 0.88rem;
  cursor: pointer;
  transition: var(--transition);
  background: var(--bg-card);
  color: var(--text-light);
  border: 1px solid var(--border);
}

.tag-filter span:hover,
.tag-filter span.active {
  background: var(--accent);
  color: var(--primary);
  border-color: var(--accent);
}

/* === 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); }
}

@media (max-width: 768px) {
  .main-nav {
    display: none;
    position: absolute;
    top: 68px;
    left: 0;
    right: 0;
    background: var(--primary);
    flex-direction: column;
    padding: 10px 0;
    box-shadow: 0 8px 20px rgba(0,0,0,0.3);
  }

  .main-nav.active { display: flex; }
  .main-nav a { padding: 14px 24px; border-bottom: 1px solid rgba(255,255,255,0.05); }
  .mobile-toggle { display: flex; }

  .hero-banner { height: 400px; }
  .hero-content h1 { font-size: 2rem; }
  .hero-content p { font-size: 1rem; }

  .video-grid { grid-template-columns: repeat(2, 1fr); }
  .service-grid { grid-template-columns: 1fr; }
  .ai-grid { grid-template-columns: 1fr; }
  .community-grid { grid-template-columns: 1fr; }
  .review-grid { grid-template-columns: 1fr; }
  .expert-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .howto-steps { flex-direction: column; align-items: center; }
}

@media (max-width: 480px) {
  .video-grid { grid-template-columns: 1fr; }
  .hero-banner { height: 340px; }
  .hero-content h1 { font-size: 1.6rem; }
  .hero-btns { flex-direction: column; align-items: center; }
}