/* ============================================
   反差靓女 - 影视传媒视频社区 主样式表
   品牌：反差靓女 | 域名：xiagushalong.cn
   原创配色方案 & 原创布局设计
   ============================================ */

/* === CSS Variables === */
:root {
  --primary: #FF2D55;
  --primary-dark: #D4234A;
  --accent: #00D4FF;
  --accent-dark: #00A8CC;
  --gradient-warm: linear-gradient(135deg, #FF2D55, #FF6B35);
  --gradient-cool: linear-gradient(135deg, #00D4FF, #7B61FF);
  --gradient-hero: linear-gradient(135deg, #1A0A2E 0%, #2D1B4E 50%, #1A0A2E 100%);
  --bg-dark: #0D0D1A;
  --bg-card: #1C1C2E;
  --bg-card-hover: #252540;
  --bg-section: #141428;
  --text-white: #FFFFFF;
  --text-gray: #B8B8CC;
  --text-muted: #8888A0;
  --border-color: #2A2A45;
  --shadow-card: 0 8px 32px rgba(0,0,0,0.3);
  --shadow-hover: 0 12px 48px rgba(255,45,85,0.15);
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 20px;
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* === Reset & Base === */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

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

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

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

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

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

ul, ol {
  list-style: none;
}

/* === Typography === */
h1, h2, h3, h4, h5, h6 {
  font-weight: 700;
  line-height: 1.3;
  color: var(--text-white);
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.1rem; }
h6 { font-size: 1rem; }

p {
  color: var(--text-gray);
  margin-bottom: 1rem;
}

.section-title {
  text-align: center;
  margin-bottom: 3rem;
}

.section-title h2 {
  font-size: 2.2rem;
  margin-bottom: 0.75rem;
  background: var(--gradient-warm);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.section-title p {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto;
}

/* === Layout === */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 20px;
}

.section {
  padding: 80px 0;
}

.section-alt {
  background-color: var(--bg-section);
}

/* === 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(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  transition: var(--transition);
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}

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

.nav-logo img {
  height: 42px;
  width: auto;
}

.nav-logo span {
  font-size: 1.4rem;
  font-weight: 800;
  background: var(--gradient-warm);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-menu a {
  color: var(--text-gray);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 500;
  transition: var(--transition);
  white-space: nowrap;
}

.nav-menu a:hover,
.nav-menu a.active {
  color: var(--text-white);
  background: rgba(255, 45, 85, 0.12);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 5px;
}

.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--text-white);
  border-radius: 2px;
  transition: var(--transition);
}

/* === Search Bar === */
.search-bar-wrapper {
  background: var(--bg-section);
  padding: 15px 0;
  border-bottom: 1px solid var(--border-color);
  margin-top: 70px;
}

.search-bar {
  display: flex;
  max-width: 680px;
  margin: 0 auto;
  background: var(--bg-card);
  border-radius: 50px;
  border: 1px solid var(--border-color);
  overflow: hidden;
  transition: var(--transition);
}

.search-bar:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(255, 45, 85, 0.15);
}

.search-bar input {
  flex: 1;
  background: transparent;
  border: none;
  padding: 12px 24px;
  color: var(--text-white);
  font-size: 0.95rem;
  outline: none;
}

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

.search-bar button {
  background: var(--gradient-warm);
  border: none;
  padding: 12px 28px;
  color: white;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
}

.search-bar button:hover {
  opacity: 0.9;
}

/* === Hero Section === */
.hero {
  position: relative;
  min-height: 75vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: var(--gradient-hero);
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 1;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.35;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(13,13,26,0.5) 0%, rgba(13,13,26,0.85) 100%);
  z-index: 2;
}

.hero-content {
  position: relative;
  z-index: 3;
  text-align: center;
  max-width: 800px;
  padding: 0 20px;
}

.hero-content h1 {
  font-size: 3.2rem;
  font-weight: 900;
  margin-bottom: 1rem;
  line-height: 1.2;
}

.hero-content h1 .brand-highlight {
  background: var(--gradient-warm);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-content .hero-desc {
  font-size: 1.2rem;
  color: var(--text-gray);
  margin-bottom: 2rem;
  line-height: 1.8;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-bottom: 2rem;
}

.hero-tags span {
  background: rgba(255, 45, 85, 0.12);
  color: var(--primary);
  padding: 6px 18px;
  border-radius: 50px;
  font-size: 0.85rem;
  border: 1px solid rgba(255, 45, 85, 0.25);
}

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

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 32px;
  border-radius: 50px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  border: none;
  text-decoration: none;
}

.btn-primary {
  background: var(--gradient-warm);
  color: white;
  box-shadow: 0 4px 20px rgba(255, 45, 85, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(255, 45, 85, 0.45);
  color: white;
}

.btn-outline {
  background: transparent;
  color: var(--text-white);
  border: 2px solid var(--border-color);
}

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 8px 20px;
  font-size: 0.85rem;
}

/* === Video Card Grid === */
.video-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

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

.video-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(255, 45, 85, 0.3);
}

.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;
  opacity: 1 !important;
}

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

.video-play-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.8);
  width: 60px;
  height: 60px;
  background: rgba(255, 45, 85, 0.85);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: var(--transition);
  z-index: 5;
}

.video-play-btn::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;
}

.video-card:hover .video-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: white;
  padding: 2px 8px;
  border-radius: 4px;
  font-size: 0.75rem;
  z-index: 5;
}

.video-info {
  padding: 16px;
}

.video-info h4 {
  font-size: 0.95rem;
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  line-height: 1.5;
}

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

.video-meta span {
  display: flex;
  align-items: center;
  gap: 4px;
}

.video-tag {
  display: inline-block;
  background: rgba(0, 212, 255, 0.1);
  color: var(--accent);
  padding: 2px 10px;
  border-radius: 4px;
  font-size: 0.72rem;
  margin-top: 8px;
}

/* === Service Cards === */
.service-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.service-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 36px 28px;
  border: 1px solid var(--border-color);
  transition: var(--transition);
  text-align: center;
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(255, 45, 85, 0.3);
}

.service-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  background: var(--gradient-warm);
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
}

.service-icon.blue {
  background: var(--gradient-cool);
}

.service-card h4 {
  margin-bottom: 12px;
}

.service-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* === Expert Section === */
.expert-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 28px;
}

.expert-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 32px 20px;
  text-align: center;
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

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

.expert-avatar {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  margin: 0 auto 16px;
  overflow: hidden;
  border: 3px solid var(--primary);
}

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

.expert-card h4 {
  margin-bottom: 4px;
}

.expert-card .expert-title {
  color: var(--primary);
  font-size: 0.85rem;
  margin-bottom: 10px;
}

.expert-card p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.expert-btns {
  display: flex;
  gap: 8px;
  justify-content: center;
}

/* === Partners === */
.partner-logos {
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
  justify-content: center;
  align-items: center;
}

.partner-logo {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 20px 32px;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-muted);
  transition: var(--transition);
  min-width: 160px;
  text-align: center;
}

.partner-logo:hover {
  border-color: var(--primary);
  color: var(--text-white);
  transform: scale(1.05);
}

/* === Reviews === */
.review-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.review-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 28px;
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

.review-card:hover {
  border-color: rgba(255, 45, 85, 0.3);
}

.review-header {
  display: flex;
  align-items: center;
  gap: 14px;
  margin-bottom: 14px;
}

.review-avatar {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: var(--gradient-warm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 700;
  color: white;
  flex-shrink: 0;
}

.review-name {
  font-weight: 600;
  font-size: 0.95rem;
}

.review-date {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.review-stars {
  color: #FFD700;
  font-size: 0.9rem;
  margin-bottom: 10px;
  letter-spacing: 2px;
}

.review-card p {
  font-size: 0.9rem;
  line-height: 1.7;
}

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

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

.faq-question {
  padding: 20px 24px;
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
  font-size: 1rem;
  transition: var(--transition);
}

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

.faq-question::after {
  content: '+';
  font-size: 1.5rem;
  color: var(--primary);
  transition: var(--transition);
  flex-shrink: 0;
  margin-left: 16px;
}

.faq-item.active .faq-question::after {
  content: '−';
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}

.faq-answer-inner {
  padding: 0 24px 20px;
  color: var(--text-gray);
  font-size: 0.92rem;
  line-height: 1.8;
}

.faq-item.active .faq-answer {
  max-height: 500px;
}

/* === Contact Section === */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 40px;
}

.contact-info-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  background: var(--bg-card);
  padding: 20px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
}

.contact-icon {
  width: 44px;
  height: 44px;
  background: var(--gradient-warm);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  flex-shrink: 0;
}

.contact-item h5 {
  margin-bottom: 4px;
}

.contact-item p {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 0;
}

.contact-qr {
  display: flex;
  gap: 24px;
  justify-content: center;
  align-items: flex-start;
}

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

.qr-item img {
  width: 160px;
  height: 160px;
  border-radius: var(--radius-sm);
  margin-bottom: 8px;
}

.qr-item p {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* === How-To Guide === */
.howto-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  counter-reset: step;
}

.howto-step {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 32px 24px;
  text-align: center;
  border: 1px solid var(--border-color);
  position: relative;
  counter-increment: step;
}

.howto-step::before {
  content: counter(step);
  display: block;
  width: 48px;
  height: 48px;
  line-height: 48px;
  background: var(--gradient-warm);
  border-radius: 50%;
  margin: 0 auto 16px;
  font-size: 1.3rem;
  font-weight: 800;
  color: white;
}

.howto-step h4 {
  margin-bottom: 8px;
  font-size: 1rem;
}

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

/* === Community Section === */
.community-features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.community-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border-color);
  transition: var(--transition);
}

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

.community-card-img {
  height: 200px;
  overflow: hidden;
}

.community-card-img img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.5s ease;
}

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

.community-card-body {
  padding: 20px;
}

.community-card-body h4 {
  margin-bottom: 8px;
}

.community-card-body p {
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* === Share Buttons === */
.share-buttons {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 20px;
  border-radius: 50px;
  font-size: 0.85rem;
  font-weight: 600;
  color: white;
  transition: var(--transition);
  cursor: pointer;
  border: none;
}

.share-btn:hover {
  transform: translateY(-2px);
  opacity: 0.9;
  color: white;
}

.share-btn.wechat { background: #07C160; }
.share-btn.weibo { background: #E6162D; }
.share-btn.douyin { background: #161823; border: 1px solid #333; }
.share-btn.bilibili { background: #00A1D6; }

/* === Footer === */
.site-footer {
  background: #0A0A18;
  border-top: 1px solid var(--border-color);
  padding: 60px 0 0;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}

.footer-brand img {
  height: 40px;
  margin-bottom: 16px;
}

.footer-brand p {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 16px;
}

.footer-col h5 {
  margin-bottom: 16px;
  font-size: 1rem;
  color: var(--text-white);
}

.footer-col a {
  display: block;
  color: var(--text-muted);
  font-size: 0.88rem;
  padding: 4px 0;
  transition: var(--transition);
}

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

.footer-bottom {
  border-top: 1px solid var(--border-color);
  padding: 20px 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}

.footer-bottom p {
  font-size: 0.82rem;
  color: var(--text-muted);
  margin-bottom: 0;
}

/* === Breadcrumb === */
.breadcrumb {
  padding: 16px 0;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 70px;
}

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

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

.breadcrumb span {
  margin: 0 8px;
  color: var(--text-muted);
}

/* === Page Header (Inner Pages) === */
.page-header {
  background: var(--gradient-hero);
  padding: 100px 0 60px;
  text-align: center;
  margin-top: 70px;
}

.page-header h1 {
  font-size: 2.5rem;
  margin-bottom: 12px;
}

.page-header p {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto;
}

/* === Stats Bar === */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin: -40px 0 40px;
  position: relative;
  z-index: 10;
}

.stat-item {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 28px 20px;
  text-align: center;
  border: 1px solid var(--border-color);
}

.stat-number {
  font-size: 2.2rem;
  font-weight: 800;
  background: var(--gradient-warm);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 4px;
}

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

/* === AI Section === */
.ai-features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.ai-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  padding: 32px 24px;
  border: 1px solid var(--border-color);
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.ai-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-cool);
}

.ai-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 48px rgba(0, 212, 255, 0.15);
}

.ai-card h4 {
  margin-bottom: 12px;
  color: var(--accent);
}

.ai-card p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

/* === Scroll to Top === */
.scroll-top {
  position: fixed;
  bottom: 30px;
  right: 30px;
  width: 48px;
  height: 48px;
  background: var(--gradient-warm);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 1.2rem;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transition: var(--transition);
  z-index: 999;
  border: none;
  box-shadow: 0 4px 20px rgba(255, 45, 85, 0.3);
}

.scroll-top.visible {
  opacity: 1;
  visibility: visible;
}

.scroll-top:hover {
  transform: translateY(-4px);
}

/* === Lazy Loading === */
img[loading="lazy"] {
  opacity: 0;
  transition: opacity 0.5s ease;
}

img[loading="lazy"].loaded,
img.loaded {
  opacity: 1;
}

/* === Animations === */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.animate-in {
  animation: fadeInUp 0.6s ease forwards;
}

/* === 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);
  }
  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
  }
  .howto-steps {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  html { font-size: 15px; }
  
  .nav-menu {
    position: fixed;
    top: 70px;
    left: 0;
    right: 0;
    background: rgba(13, 13, 26, 0.98);
    flex-direction: column;
    padding: 20px;
    gap: 4px;
    transform: translateY(-120%);
    transition: var(--transition);
    border-bottom: 1px solid var(--border-color);
  }
  
  .nav-menu.active {
    transform: translateY(0);
  }
  
  .nav-menu a {
    width: 100%;
    text-align: center;
    padding: 12px;
  }
  
  .nav-toggle {
    display: flex;
  }
  
  .hero-content h1 {
    font-size: 2rem;
  }
  
  .video-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  
  .service-grid,
  .ai-features,
  .community-features {
    grid-template-columns: 1fr;
  }
  
  .expert-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
  }
  
  .review-grid {
    grid-template-columns: 1fr;
  }
  
  .contact-grid {
    grid-template-columns: 1fr;
  }
  
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }
  
  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
  
  .section {
    padding: 50px 0;
  }
  
  .section-title h2 {
    font-size: 1.6rem;
  }
  
  .stats-bar {
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
  }
  
  .howto-steps {
    grid-template-columns: 1fr;
  }
  
  .contact-qr {
    flex-direction: column;
    align-items: center;
  }
  
  .hero-btns {
    flex-direction: column;
    align-items: center;
  }
}

@media (max-width: 480px) {
  .video-grid {
    grid-template-columns: 1fr;
  }
  
  .expert-grid {
    grid-template-columns: 1fr;
  }
  
  .hero-content h1 {
    font-size: 1.6rem;
  }
  
  .partner-logos {
    gap: 12px;
  }
  
  .partner-logo {
    min-width: 120px;
    padding: 14px 20px;
    font-size: 0.9rem;
  }
}

/* === MCP Service Frontend (UI Only) === */
.mcp-widget {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 20px;
  margin-top: 20px;
}

.mcp-widget h5 {
  margin-bottom: 12px;
  color: var(--accent);
}

.mcp-widget .mcp-status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--text-muted);
}

.mcp-widget .mcp-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #00FF88;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* === Page Title Gradient (Inner Pages) === */
.page-title-gradient {
  background: var(--gradient-warm);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  font-size: 2.2rem;
}

/* === Expert Grid 5 Columns === */
.expert-grid-5 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.5rem;
}

@media (min-width: 1024px) {
  .expert-grid-5 {
    grid-template-columns: repeat(5, 1fr);
  }
}

/* === Hero Video Background === */
.hero-video {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
}

/* === Video Preview in Cards === */
.video-preview {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  z-index: 0;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.video-card:hover .video-preview {
  opacity: 1;
}

.video-thumb {
  position: relative;
  overflow: hidden;
}