/* =============================================
   大象传媒 - 全站样式表
   品牌色：深紫 #1a0a2e | 主紫 #6c3fc5 | 亮紫 #9b59f5
   辅色：橙红 #ff4d6d | 青蓝 #00d4ff | 深底 #0d0720
   ============================================= */

/* ---- 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', '微软雅黑', 'Hiragino Sans GB', sans-serif;
  background: #0d0720;
  color: #e0d6f5;
  line-height: 1.7;
  overflow-x: hidden;
}
a { color: #9b59f5; text-decoration: none; transition: color .25s; }
a:hover { color: #00d4ff; }
img { max-width: 100%; height: auto; display: block; }
ul { list-style: none; }
button { cursor: pointer; border: none; outline: none; }

/* ---- CSS Variables ---- */
:root {
  --color-bg: #0d0720;
  --color-bg2: #130a30;
  --color-bg3: #1a0a3e;
  --color-primary: #6c3fc5;
  --color-primary-light: #9b59f5;
  --color-accent: #ff4d6d;
  --color-cyan: #00d4ff;
  --color-text: #e0d6f5;
  --color-text-muted: #9080b0;
  --color-border: rgba(108,63,197,0.3);
  --radius: 12px;
  --radius-lg: 20px;
  --shadow: 0 4px 24px rgba(108,63,197,0.25);
  --shadow-hover: 0 8px 40px rgba(108,63,197,0.45);
  --transition: all .3s cubic-bezier(.4,0,.2,1);
}

/* ---- Scrollbar ---- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--color-bg); }
::-webkit-scrollbar-thumb { background: var(--color-primary); border-radius: 3px; }

/* ---- Container ---- */
.container { max-width: 1200px; margin: 0 auto; padding: 0 20px; }
.container-wide { max-width: 1400px; margin: 0 auto; padding: 0 20px; }

/* ---- Section ---- */
.section { padding: 80px 0; }
.section-sm { padding: 50px 0; }
.section-title {
  font-size: 2rem;
  font-weight: 700;
  text-align: center;
  margin-bottom: 12px;
  background: linear-gradient(135deg, #9b59f5, #00d4ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.section-subtitle {
  text-align: center;
  color: var(--color-text-muted);
  font-size: 1rem;
  margin-bottom: 48px;
}
.section-divider {
  width: 60px; height: 3px;
  background: linear-gradient(90deg, var(--color-primary), var(--color-cyan));
  margin: 12px auto 40px;
  border-radius: 2px;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 28px;
  border-radius: 50px;
  font-size: .95rem;
  font-weight: 600;
  transition: var(--transition);
  letter-spacing: .5px;
}
.btn-primary {
  background: linear-gradient(135deg, #6c3fc5, #9b59f5);
  color: #fff;
  box-shadow: 0 4px 20px rgba(108,63,197,0.4);
}
.btn-primary:hover {
  background: linear-gradient(135deg, #9b59f5, #6c3fc5);
  box-shadow: 0 6px 30px rgba(108,63,197,0.6);
  transform: translateY(-2px);
  color: #fff;
}
.btn-outline {
  border: 2px solid var(--color-primary-light);
  color: var(--color-primary-light);
  background: transparent;
}
.btn-outline:hover {
  background: var(--color-primary);
  color: #fff;
  transform: translateY(-2px);
}
.btn-accent {
  background: linear-gradient(135deg, #ff4d6d, #ff8c42);
  color: #fff;
  box-shadow: 0 4px 20px rgba(255,77,109,0.35);
}
.btn-accent:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 30px rgba(255,77,109,0.55);
  color: #fff;
}
.btn-sm { padding: 8px 18px; font-size: .85rem; }

/* ---- Badge / Tag ---- */
.badge {
  display: inline-block;
  padding: 3px 10px;
  border-radius: 20px;
  font-size: .75rem;
  font-weight: 600;
  background: rgba(108,63,197,0.25);
  color: var(--color-primary-light);
  border: 1px solid rgba(108,63,197,0.4);
}
.badge-hot { background: rgba(255,77,109,0.2); color: #ff4d6d; border-color: rgba(255,77,109,0.4); }
.badge-new { background: rgba(0,212,255,0.15); color: #00d4ff; border-color: rgba(0,212,255,0.35); }

/* ============================================
   HEADER / NAV
   ============================================ */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  background: rgba(13,7,32,0.92);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
  transition: var(--transition);
}
.site-header.scrolled {
  background: rgba(13,7,32,0.98);
  box-shadow: 0 2px 20px rgba(0,0,0,0.5);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: 68px;
  gap: 20px;
}
/* Logo */
.site-logo {
  display: flex; align-items: center; gap: 10px;
  flex-shrink: 0;
}
.logo-icon {
  width: 42px; height: 42px;
  background: linear-gradient(135deg, #6c3fc5, #ff4d6d);
  border-radius: 10px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem; font-weight: 900; color: #fff;
  box-shadow: 0 2px 12px rgba(108,63,197,0.5);
}
.logo-text { font-size: 1.3rem; font-weight: 800; }
.logo-text span:first-child { color: #fff; }
.logo-text span:last-child {
  background: linear-gradient(135deg, #9b59f5, #00d4ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* Nav */
.main-nav { display: flex; align-items: center; gap: 4px; }
.nav-link {
  padding: 8px 14px;
  border-radius: 8px;
  font-size: .92rem;
  color: var(--color-text-muted);
  transition: var(--transition);
  white-space: nowrap;
}
.nav-link:hover, .nav-link.active {
  color: var(--color-primary-light);
  background: rgba(108,63,197,0.15);
}

/* Search Bar */
.header-search {
  flex: 1; max-width: 320px;
  position: relative;
}
.header-search input {
  width: 100%;
  padding: 9px 16px 9px 40px;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--color-border);
  border-radius: 50px;
  color: var(--color-text);
  font-size: .88rem;
  transition: var(--transition);
  outline: none;
}
.header-search input::placeholder { color: var(--color-text-muted); }
.header-search input:focus {
  border-color: var(--color-primary-light);
  background: rgba(108,63,197,0.1);
}
.search-icon {
  position: absolute; left: 13px; top: 50%;
  transform: translateY(-50%);
  color: var(--color-text-muted);
  font-size: .9rem;
  pointer-events: none;
}
.search-btn {
  position: absolute; right: 4px; top: 50%;
  transform: translateY(-50%);
  background: var(--color-primary);
  color: #fff; border-radius: 50px;
  padding: 5px 12px; font-size: .8rem;
}
.search-btn:hover { background: var(--color-primary-light); }

/* Mobile Menu Toggle */
.menu-toggle {
  display: none;
  flex-direction: column; gap: 5px;
  background: none; padding: 6px;
}
.menu-toggle span {
  display: block; width: 24px; height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: var(--transition);
}

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex; align-items: center;
  overflow: hidden;
  padding-top: 68px;
}
.hero-bg {
  position: absolute; inset: 0;
  background: url('../images/hero-bg.jpg') center/cover no-repeat;
  filter: brightness(.45) saturate(1.2);
}
.hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(13,7,32,.85) 0%, rgba(26,10,62,.6) 50%, rgba(13,7,32,.75) 100%);
}
.hero-particles {
  position: absolute; inset: 0;
  background-image:
    radial-gradient(circle at 20% 30%, rgba(108,63,197,0.15) 0%, transparent 50%),
    radial-gradient(circle at 80% 70%, rgba(0,212,255,0.1) 0%, transparent 50%);
}
.hero-content {
  position: relative; z-index: 2;
  max-width: 700px;
}
.hero-eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 16px;
  background: rgba(108,63,197,0.2);
  border: 1px solid rgba(108,63,197,0.4);
  border-radius: 50px;
  font-size: .85rem;
  color: var(--color-primary-light);
  margin-bottom: 24px;
}
.hero-eyebrow .dot {
  width: 8px; height: 8px;
  background: #ff4d6d;
  border-radius: 50%;
  animation: pulse 1.5s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: .6; transform: scale(1.3); }
}
.hero h1 {
  font-size: clamp(2.2rem, 5vw, 3.8rem);
  font-weight: 900;
  line-height: 1.15;
  margin-bottom: 20px;
  color: #fff;
}
.hero h1 .highlight {
  background: linear-gradient(135deg, #9b59f5, #00d4ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-desc {
  font-size: 1.1rem;
  color: rgba(224,214,245,0.8);
  margin-bottom: 36px;
  max-width: 560px;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 48px; }
.hero-stats {
  display: flex; gap: 32px; flex-wrap: wrap;
}
.stat-item { text-align: center; }
.stat-num {
  font-size: 1.8rem; font-weight: 800;
  background: linear-gradient(135deg, #9b59f5, #00d4ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-label { font-size: .8rem; color: var(--color-text-muted); margin-top: 2px; }

/* Hero scroll indicator */
.hero-scroll {
  position: absolute; bottom: 30px; left: 50%;
  transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  color: var(--color-text-muted); font-size: .8rem;
  animation: bounce 2s infinite;
  z-index: 2;
}
@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}
.scroll-arrow { font-size: 1.2rem; }

/* ============================================
   VIDEO CARDS
   ============================================ */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 24px;
}
.video-card {
  background: var(--color-bg2);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: var(--transition);
  cursor: pointer;
}
.video-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-hover);
  border-color: var(--color-primary);
}
.video-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
}
.video-thumb img {
  width: 100%; height: 100%;
  object-fit: cover;
  transition: transform .4s ease;
}
.video-card:hover .video-thumb img { transform: scale(1.08); }
.video-play-btn {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  background: rgba(0,0,0,0);
  transition: var(--transition);
  opacity: 0;
}
.video-card:hover .video-play-btn { opacity: 1; background: rgba(0,0,0,0.4); }
.play-circle {
  width: 60px; height: 60px;
  background: rgba(108,63,197,0.9);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem; color: #fff;
  box-shadow: 0 4px 20px rgba(108,63,197,0.6);
  transform: scale(0.8);
  transition: var(--transition);
}
.video-card:hover .play-circle { transform: scale(1); }
.video-duration {
  position: absolute; bottom: 8px; right: 8px;
  background: rgba(0,0,0,0.75);
  color: #fff; font-size: .75rem;
  padding: 2px 7px; border-radius: 4px;
}
.video-quality {
  position: absolute; top: 8px; left: 8px;
}
.video-info { padding: 14px 16px; }
.video-title {
  font-size: .95rem; font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.video-meta {
  display: flex; align-items: center; justify-content: space-between;
  font-size: .8rem; color: var(--color-text-muted);
}
.video-stats { display: flex; gap: 12px; }
.video-stats span { display: flex; align-items: center; gap: 4px; }

/* ============================================
   FEATURE CARDS
   ============================================ */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 24px;
}
.feature-card {
  background: var(--color-bg2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px 24px;
  text-align: center;
  transition: var(--transition);
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: var(--color-primary);
}
.feature-icon {
  width: 64px; height: 64px;
  background: linear-gradient(135deg, rgba(108,63,197,0.2), rgba(0,212,255,0.1));
  border-radius: 16px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.8rem;
  margin: 0 auto 16px;
  border: 1px solid rgba(108,63,197,0.3);
}
.feature-card h3 { font-size: 1.05rem; font-weight: 700; margin-bottom: 8px; color: #fff; }
.feature-card p { font-size: .88rem; color: var(--color-text-muted); line-height: 1.6; }

/* ============================================
   EXPERT CARDS
   ============================================ */
.expert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 24px;
}
.expert-card {
  background: var(--color-bg2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
  text-align: center;
  transition: var(--transition);
}
.expert-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-hover);
  border-color: var(--color-primary);
}
.expert-avatar {
  width: 100%; aspect-ratio: 1/1;
  overflow: hidden;
}
.expert-avatar img { width: 100%; height: 100%; object-fit: cover; }
.expert-info { padding: 16px; }
.expert-name { font-size: 1rem; font-weight: 700; color: #fff; margin-bottom: 4px; }
.expert-role { font-size: .82rem; color: var(--color-primary-light); margin-bottom: 8px; }
.expert-desc { font-size: .82rem; color: var(--color-text-muted); margin-bottom: 12px; line-height: 1.5; }
.expert-actions { display: flex; gap: 8px; justify-content: center; }

/* ============================================
   REVIEW / TESTIMONIAL
   ============================================ */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}
.review-card {
  background: var(--color-bg2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 22px;
  transition: var(--transition);
}
.review-card:hover { border-color: var(--color-primary); }
.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(--color-primary), var(--color-cyan));
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem; font-weight: 700; color: #fff;
  flex-shrink: 0;
}
.review-user { flex: 1; }
.review-name { font-size: .92rem; font-weight: 600; color: #fff; }
.review-date { font-size: .78rem; color: var(--color-text-muted); }
.review-stars { color: #ffd700; font-size: .9rem; margin-bottom: 8px; }
.review-text { font-size: .88rem; color: var(--color-text-muted); line-height: 1.6; }
.review-tag { margin-top: 10px; }

/* ============================================
   FAQ
   ============================================ */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  background: var(--color-bg2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
}
.faq-question {
  padding: 18px 22px;
  display: flex; align-items: center; justify-content: space-between;
  cursor: pointer;
  font-size: .95rem; font-weight: 600; color: #fff;
  transition: var(--transition);
  user-select: none;
}
.faq-question:hover { color: var(--color-primary-light); }
.faq-icon {
  width: 24px; height: 24px;
  background: rgba(108,63,197,0.2);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: .8rem; color: var(--color-primary-light);
  flex-shrink: 0;
  transition: transform .3s;
}
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-answer {
  padding: 0 22px;
  max-height: 0; overflow: hidden;
  transition: max-height .35s ease, padding .35s ease;
  font-size: .9rem; color: var(--color-text-muted); line-height: 1.7;
}
.faq-item.open .faq-answer { max-height: 300px; padding: 0 22px 18px; }

/* ============================================
   PARTNER LOGOS
   ============================================ */
.partner-logos {
  display: flex; flex-wrap: wrap; gap: 16px;
  justify-content: center; align-items: center;
}
.partner-logo {
  background: var(--color-bg2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 14px 24px;
  font-size: .9rem; font-weight: 700;
  color: var(--color-text-muted);
  transition: var(--transition);
  min-width: 120px; text-align: center;
}
.partner-logo:hover {
  border-color: var(--color-primary);
  color: var(--color-primary-light);
}

/* ============================================
   CONTACT SECTION
   ============================================ */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 24px;
}
.contact-card {
  background: var(--color-bg2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 24px;
  text-align: center;
  transition: var(--transition);
}
.contact-card:hover { border-color: var(--color-primary); transform: translateY(-3px); }
.contact-icon {
  font-size: 2.2rem; margin-bottom: 12px;
}
.contact-card h4 { font-size: 1rem; font-weight: 700; color: #fff; margin-bottom: 6px; }
.contact-card p { font-size: .88rem; color: var(--color-text-muted); }
.contact-card a { color: var(--color-primary-light); }

/* QR Code */
.qr-grid { display: flex; gap: 32px; justify-content: center; flex-wrap: wrap; }
.qr-item { text-align: center; }
.qr-code {
  width: 120px; height: 120px;
  background: #fff;
  border-radius: 12px;
  margin: 0 auto 8px;
  display: flex; align-items: center; justify-content: center;
  overflow: hidden;
}
.qr-code canvas { display: block; }
.qr-label { font-size: .82rem; color: var(--color-text-muted); }

/* ============================================
   FOOTER
   ============================================ */
.site-footer {
  background: var(--color-bg2);
  border-top: 1px solid var(--color-border);
  padding: 60px 0 0;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
}
.footer-brand p { font-size: .88rem; color: var(--color-text-muted); margin: 12px 0 20px; line-height: 1.7; }
.footer-social { display: flex; gap: 10px; flex-wrap: wrap; }
.social-btn {
  width: 38px; height: 38px;
  background: rgba(108,63,197,0.15);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: .9rem; color: var(--color-text-muted);
  transition: var(--transition);
}
.social-btn:hover {
  background: var(--color-primary);
  color: #fff; border-color: var(--color-primary);
}
.footer-col h5 {
  font-size: .95rem; font-weight: 700; color: #fff;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--color-border);
}
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a { font-size: .88rem; color: var(--color-text-muted); }
.footer-col ul li a:hover { color: var(--color-primary-light); }
.footer-bottom {
  border-top: 1px solid var(--color-border);
  padding: 20px 0;
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 12px;
  font-size: .82rem; color: var(--color-text-muted);
}
.footer-bottom a { color: var(--color-text-muted); }
.footer-bottom a:hover { color: var(--color-primary-light); }
.footer-links { display: flex; gap: 20px; flex-wrap: wrap; }

/* ============================================
   BREADCRUMB
   ============================================ */
.breadcrumb {
  display: flex; align-items: center; gap: 8px;
  font-size: .85rem; color: var(--color-text-muted);
  padding: 12px 0;
}
.breadcrumb a { color: var(--color-text-muted); }
.breadcrumb a:hover { color: var(--color-primary-light); }
.breadcrumb .sep { color: var(--color-border); }
.breadcrumb .current { color: var(--color-primary-light); }

/* ============================================
   PAGE HERO (inner pages)
   ============================================ */
.page-hero {
  padding: 120px 0 60px;
  text-align: center;
  background: linear-gradient(180deg, rgba(108,63,197,0.1) 0%, transparent 100%);
  border-bottom: 1px solid var(--color-border);
}
.page-hero h1 {
  font-size: clamp(1.8rem, 4vw, 3rem);
  font-weight: 900; color: #fff;
  margin-bottom: 12px;
}
.page-hero p { font-size: 1rem; color: var(--color-text-muted); max-width: 600px; margin: 0 auto; }

/* ============================================
   DANMAKU / LIVE BADGE
   ============================================ */
.live-badge {
  display: inline-flex; align-items: center; gap: 6px;
  background: rgba(255,77,109,0.15);
  border: 1px solid rgba(255,77,109,0.4);
  border-radius: 50px;
  padding: 4px 12px;
  font-size: .8rem; color: #ff4d6d; font-weight: 600;
}
.live-dot {
  width: 7px; height: 7px;
  background: #ff4d6d; border-radius: 50%;
  animation: pulse 1.2s infinite;
}

/* ============================================
   ANNOUNCEMENT BAR
   ============================================ */
.announcement-bar {
  background: linear-gradient(90deg, #6c3fc5, #ff4d6d, #6c3fc5);
  background-size: 200% 100%;
  animation: shimmer 4s linear infinite;
  padding: 8px 0;
  text-align: center;
  font-size: .85rem; color: #fff; font-weight: 500;
}
@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ============================================
   TAGS CLOUD
   ============================================ */
.tags-cloud { display: flex; flex-wrap: wrap; gap: 8px; }
.tag {
  padding: 5px 12px;
  background: rgba(108,63,197,0.12);
  border: 1px solid rgba(108,63,197,0.25);
  border-radius: 50px;
  font-size: .82rem; color: var(--color-text-muted);
  transition: var(--transition);
  cursor: pointer;
}
.tag:hover {
  background: rgba(108,63,197,0.25);
  color: var(--color-primary-light);
  border-color: var(--color-primary);
}

/* ============================================
   HOW-TO STEPS
   ============================================ */
.steps-list { display: flex; flex-direction: column; gap: 20px; max-width: 700px; margin: 0 auto; }
.step-item {
  display: flex; gap: 20px; align-items: flex-start;
  background: var(--color-bg2);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px 24px;
}
.step-num {
  width: 40px; height: 40px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-cyan));
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem; font-weight: 800; color: #fff;
  flex-shrink: 0;
}
.step-content h4 { font-size: .95rem; font-weight: 700; color: #fff; margin-bottom: 4px; }
.step-content p { font-size: .88rem; color: var(--color-text-muted); }

/* ============================================
   SHARE BAR
   ============================================ */
.share-bar {
  display: flex; align-items: center; gap: 12px; flex-wrap: wrap;
}
.share-label { font-size: .88rem; color: var(--color-text-muted); }
.share-btns { display: flex; gap: 8px; }
.share-btn {
  padding: 7px 14px;
  border-radius: 50px;
  font-size: .82rem; font-weight: 600;
  transition: var(--transition);
  display: flex; align-items: center; gap: 5px;
}
.share-wechat { background: rgba(9,187,7,0.15); color: #09bb07; border: 1px solid rgba(9,187,7,0.3); }
.share-weibo { background: rgba(230,22,45,0.15); color: #e6162d; border: 1px solid rgba(230,22,45,0.3); }
.share-douyin { background: rgba(0,0,0,0.3); color: #fff; border: 1px solid rgba(255,255,255,0.2); }
.share-bilibili { background: rgba(0,161,214,0.15); color: #00a1d6; border: 1px solid rgba(0,161,214,0.3); }
.share-btn:hover { opacity: .8; transform: translateY(-1px); }

/* ============================================
   LOADING / SKELETON
   ============================================ */
.skeleton {
  background: linear-gradient(90deg, var(--color-bg2) 25%, rgba(108,63,197,0.1) 50%, var(--color-bg2) 75%);
  background-size: 200% 100%;
  animation: skeleton-load 1.5s infinite;
  border-radius: 6px;
}
@keyframes skeleton-load {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ============================================
   NOTIFICATION / TOAST
   ============================================ */
.toast {
  position: fixed; bottom: 24px; right: 24px; z-index: 9999;
  background: var(--color-bg3);
  border: 1px solid var(--color-primary);
  border-radius: var(--radius);
  padding: 14px 20px;
  font-size: .9rem; color: var(--color-text);
  box-shadow: var(--shadow);
  transform: translateY(100px); opacity: 0;
  transition: var(--transition);
  max-width: 320px;
}
.toast.show { transform: translateY(0); opacity: 1; }

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .main-nav { display: none; }
  .main-nav.open {
    display: flex; flex-direction: column;
    position: fixed; top: 68px; left: 0; right: 0;
    background: rgba(13,7,32,0.98);
    padding: 20px;
    border-bottom: 1px solid var(--color-border);
    z-index: 999;
    gap: 4px;
  }
  .menu-toggle { display: flex; }
  .header-search { max-width: 200px; }
  .hero h1 { font-size: 2rem; }
  .hero-stats { gap: 20px; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; text-align: center; }
  .section { padding: 50px 0; }
  .video-grid { grid-template-columns: repeat(auto-fill, minmax(240px, 1fr)); }
}
@media (max-width: 480px) {
  .hero-actions { flex-direction: column; }
  .btn { width: 100%; justify-content: center; }
  .video-grid { grid-template-columns: 1fr; }
  .feature-grid { grid-template-columns: 1fr; }
}

/* ============================================
   UTILITY CLASSES
   ============================================ */
.text-center { text-align: center; }
.text-muted { color: var(--color-text-muted); }
.text-primary { color: var(--color-primary-light); }
.text-accent { color: var(--color-accent); }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.mb-8 { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }
.mb-24 { margin-bottom: 24px; }
.mb-32 { margin-bottom: 32px; }
.flex { display: flex; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.gap-8 { gap: 8px; }
.gap-16 { gap: 16px; }
.hidden { display: none !important; }
.bg-card { background: var(--color-bg2); border: 1px solid var(--color-border); border-radius: var(--radius); }
.p-24 { padding: 24px; }
.gradient-text {
  background: linear-gradient(135deg, #9b59f5, #00d4ff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ============================================
   AI LAYOUT & INNER PAGE RESPONSIVE FIX
   ============================================ */
.ai-layout { grid-template-columns: 1fr 1fr; }
@media (max-width: 768px) {
  .ai-layout { grid-template-columns: 1fr; }
  .ai-layout > div:last-child { order: -1; }
  .page-hero { padding: 100px 0 40px; }
  .expert-grid { grid-template-columns: repeat(auto-fill, minmax(180px, 1fr)); }
  .contact-grid { grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); }
  section[style*="grid-template-columns:1fr 1fr"] { grid-template-columns: 1fr !important; }
  div[style*="grid-template-columns:1fr 1fr"] { grid-template-columns: 1fr !important; }
  div[style*="grid-template-columns:repeat(4,1fr)"] { grid-template-columns: repeat(2,1fr) !important; }
}
@media (max-width: 480px) {
  div[style*="grid-template-columns:repeat(4,1fr)"] { grid-template-columns: repeat(2,1fr) !important; }
  .hero-stats { gap: 16px; }
  .stat-num { font-size: 1.4rem; }
}

/* ============================================
   EEAT TRUST BAR
   ============================================ */
.eeat-bar {
  background: linear-gradient(90deg, rgba(108,63,197,0.12), rgba(0,212,255,0.08), rgba(108,63,197,0.12));
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding: 10px 0;
}
.eeat-inner {
  display: flex; align-items: center; justify-content: center;
  gap: 12px; flex-wrap: wrap;
  font-size: .82rem; color: var(--color-text-muted);
}
.eeat-sep { color: var(--color-border); }
.eeat-item { white-space: nowrap; }

/* ============================================
   FOOTER COMPLIANCE
   ============================================ */
.footer-compliance {
  border-top: 1px solid var(--color-border);
  padding: 16px 0;
  font-size: .8rem; color: var(--color-text-muted);
  line-height: 1.6;
}
.footer-compliance a { color: var(--color-primary-light); }
.footer-bottom-left { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.footer-sep { color: var(--color-border); }
.footer-eeat-experts { margin-top: 12px; }

/* ============================================
   BACK TO TOP BUTTON
   ============================================ */
.back-to-top {
  position: fixed; bottom: 80px; right: 24px; z-index: 999;
  width: 44px; height: 44px;
  background: var(--color-primary);
  color: #fff; border-radius: 50%;
  font-size: 1.1rem; font-weight: 700;
  box-shadow: 0 4px 16px rgba(108,63,197,0.5);
  transition: var(--transition);
  opacity: 0; pointer-events: none;
  transform: translateY(20px);
}
.back-to-top.visible { opacity: 1; pointer-events: auto; transform: translateY(0); }
.back-to-top:hover { background: var(--color-primary-light); transform: translateY(-3px); }

/* ============================================
   REVIEW RATING (EEAT)
   ============================================ */
.review-rating-meta {
  display: flex; align-items: center; gap: 8px;
  margin-bottom: 6px;
}
.review-rating-val {
  font-size: .8rem; color: var(--color-text-muted);
}
.review-verified {
  font-size: .75rem; color: #09bb07;
  background: rgba(9,187,7,0.1);
  border: 1px solid rgba(9,187,7,0.25);
  border-radius: 4px; padding: 1px 6px;
}

/* ============================================
   CONTENT POLICY BOX (EEAT)
   ============================================ */
.policy-box {
  background: rgba(108,63,197,0.06);
  border: 1px solid var(--color-border);
  border-left: 3px solid var(--color-primary);
  border-radius: var(--radius);
  padding: 16px 20px;
  font-size: .85rem; color: var(--color-text-muted);
  line-height: 1.7;
}
.policy-box strong { color: var(--color-primary-light); }

/* ============================================
   UPDATE META (EEAT时效性)
   ============================================ */
.update-meta {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: .8rem; color: var(--color-text-muted);
  background: rgba(0,212,255,0.08);
  border: 1px solid rgba(0,212,255,0.2);
  border-radius: 50px; padding: 3px 10px;
}
.update-meta .dot { width: 6px; height: 6px; background: #00d4ff; border-radius: 50%; }

/* ============================================
   INNER PAGE FAQ / REVIEW ADDITIONS
   ============================================ */
.inner-section { padding: 60px 0; }
.inner-section-alt { padding: 60px 0; background: var(--color-bg2); }

@media (max-width: 768px) {
  .eeat-inner { gap: 6px; font-size: .75rem; }
  .footer-bottom-left { flex-direction: column; align-items: flex-start; gap: 4px; }
  .back-to-top { bottom: 60px; right: 16px; }
}