/* =============================================
   四虎 - 主样式文件
   品牌色：深紫 #2D1B69 / 电紫 #7C3AED / 亮蓝 #3B82F6 / 粉紫 #A855F7
   ============================================= */

/* ---- CSS 变量 ---- */
:root {
  --primary: #7C3AED;
  --primary-dark: #2D1B69;
  --primary-light: #A855F7;
  --accent: #3B82F6;
  --accent-glow: #60A5FA;
  --pink: #EC4899;
  --bg-dark: #0F0A1E;
  --bg-card: #1A1035;
  --bg-card2: #1E1540;
  --text-main: #F0EAF8;
  --text-muted: #9CA3AF;
  --text-light: #C4B5FD;
  --border: rgba(124,58,237,0.25);
  --shadow: 0 4px 24px rgba(124,58,237,0.18);
  --radius: 12px;
  --radius-lg: 20px;
  --transition: 0.3s cubic-bezier(0.4,0,0.2,1);
}

/* ---- 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', sans-serif;
  background: var(--bg-dark);
  color: var(--text-main);
  line-height: 1.7;
  overflow-x: hidden;
}
a { color: var(--primary-light); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--accent-glow); }
img { max-width: 100%; height: auto; display: block; }
ul, ol { list-style: none; }
button { cursor: pointer; border: none; outline: none; }

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

/* =============================================
   HEADER
   ============================================= */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(15,10,30,0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border);
  padding: 0 24px;
}
.header-inner {
  max-width: 1280px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  gap: 20px;
}
.logo-wrap {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo-wrap img {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  object-fit: cover;
}
.logo-text {
  font-size: 1.35rem;
  font-weight: 800;
  background: linear-gradient(135deg, var(--primary-light), var(--accent-glow));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  letter-spacing: 0.02em;
}
/* 导航 */
.main-nav { display: flex; align-items: center; gap: 4px; }
.main-nav a {
  color: var(--text-main);
  font-size: 0.92rem;
  font-weight: 500;
  padding: 6px 14px;
  border-radius: 8px;
  transition: background var(--transition), color var(--transition);
  white-space: nowrap;
}
.main-nav a:hover,
.main-nav a.active {
  background: rgba(124,58,237,0.18);
  color: var(--primary-light);
}
/* 搜索框 */
.search-wrap {
  display: flex;
  align-items: center;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border);
  border-radius: 24px;
  padding: 5px 14px;
  gap: 8px;
  min-width: 200px;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.search-wrap:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(124,58,237,0.15);
}
.search-wrap input {
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-main);
  font-size: 0.88rem;
  width: 100%;
}
.search-wrap input::placeholder { color: var(--text-muted); }
.search-btn {
  background: none;
  color: var(--text-muted);
  font-size: 1rem;
  padding: 0;
  transition: color var(--transition);
}
.search-btn:hover { color: var(--primary-light); }
/* 汉堡菜单 */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-main);
  border-radius: 2px;
  transition: var(--transition);
}

/* =============================================
   HERO SECTION
   ============================================= */
.hero {
  position: relative;
  min-height: 560px;
  display: flex;
  align-items: center;
  overflow: hidden;
}
.hero-bg {
  position: absolute;
  inset: 0;
  background-image: url('../images/hero_banner.jpg');
  background-size: cover;
  background-position: center;
  filter: brightness(0.45);
  z-index: 0;
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(45,27,105,0.75) 0%, rgba(15,10,30,0.55) 100%);
  z-index: 1;
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 1280px;
  margin: 0 auto;
  padding: 80px 24px;
  width: 100%;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(124,58,237,0.22);
  border: 1px solid rgba(124,58,237,0.4);
  color: var(--primary-light);
  font-size: 0.82rem;
  font-weight: 600;
  padding: 5px 14px;
  border-radius: 20px;
  margin-bottom: 18px;
  letter-spacing: 0.05em;
}
.hero h1 {
  font-size: clamp(2rem, 5vw, 3.4rem);
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 18px;
  max-width: 700px;
}
.hero h1 span {
  background: linear-gradient(135deg, var(--primary-light), var(--accent-glow));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero p {
  font-size: 1.05rem;
  color: rgba(240,234,248,0.8);
  max-width: 560px;
  margin-bottom: 32px;
}
.hero-btns { display: flex; gap: 14px; flex-wrap: wrap; }
.btn-primary {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: #fff;
  font-size: 0.95rem;
  font-weight: 700;
  padding: 12px 28px;
  border-radius: 10px;
  transition: opacity var(--transition), transform var(--transition), box-shadow var(--transition);
  box-shadow: 0 4px 20px rgba(124,58,237,0.4);
}
.btn-primary:hover {
  opacity: 0.9;
  transform: translateY(-2px);
  box-shadow: 0 8px 28px rgba(124,58,237,0.5);
  color: #fff;
}
.btn-outline {
  background: transparent;
  color: var(--text-main);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 12px 28px;
  border-radius: 10px;
  border: 1.5px solid rgba(255,255,255,0.25);
  transition: border-color var(--transition), background var(--transition);
}
.btn-outline:hover {
  border-color: var(--primary-light);
  background: rgba(124,58,237,0.12);
  color: var(--primary-light);
}
.btn-sm {
  font-size: 0.82rem;
  padding: 8px 18px;
  border-radius: 8px;
}

/* =============================================
   SECTION COMMONS
   ============================================= */
.section { padding: 72px 24px; }
.section-inner { max-width: 1280px; margin: 0 auto; }
.section-header { text-align: center; margin-bottom: 48px; }
.section-tag {
  display: inline-block;
  background: rgba(124,58,237,0.15);
  color: var(--primary-light);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  padding: 4px 14px;
  border-radius: 20px;
  margin-bottom: 12px;
  border: 1px solid rgba(124,58,237,0.3);
}
.section-title {
  font-size: clamp(1.5rem, 3vw, 2.2rem);
  font-weight: 800;
  margin-bottom: 12px;
  line-height: 1.3;
}
.section-title span {
  background: linear-gradient(135deg, var(--primary-light), var(--accent-glow));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.section-desc {
  color: var(--text-muted);
  font-size: 0.95rem;
  max-width: 560px;
  margin: 0 auto;
}
.section-alt { background: var(--bg-card); }
.section-alt2 { background: var(--bg-card2); }

/* =============================================
   VIDEO CARD
   ============================================= */
.video-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}
.video-card {
  background: var(--bg-card);
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
  cursor: pointer;
}
.video-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow);
  border-color: rgba(124,58,237,0.5);
}
.video-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: #1a1035;
}
.video-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.video-card:hover .video-thumb img { transform: scale(1.06); }
.play-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.35);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition);
}
.video-card:hover .play-overlay { opacity: 1; }
.play-btn-circle {
  width: 56px;
  height: 56px;
  background: rgba(124,58,237,0.85);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(4px);
  transition: transform 0.2s;
  box-shadow: 0 0 20px rgba(124,58,237,0.6);
}
.play-btn-circle:hover { transform: scale(1.1); }
.play-btn-circle svg { width: 22px; height: 22px; fill: #fff; margin-left: 3px; }
.video-badge {
  position: absolute;
  top: 10px;
  left: 10px;
  background: var(--primary);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  padding: 3px 8px;
  border-radius: 5px;
  letter-spacing: 0.05em;
}
.video-duration {
  position: absolute;
  bottom: 8px;
  right: 8px;
  background: rgba(0,0,0,0.7);
  color: #fff;
  font-size: 0.72rem;
  padding: 2px 7px;
  border-radius: 4px;
}
.video-info { padding: 14px 16px; }
.video-title {
  font-size: 0.92rem;
  font-weight: 700;
  margin-bottom: 8px;
  line-height: 1.4;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.video-meta {
  display: flex;
  align-items: center;
  gap: 14px;
  font-size: 0.78rem;
  color: var(--text-muted);
}
.video-meta span { display: flex; align-items: center; gap: 4px; }

/* =============================================
   FEATURE CARDS
   ============================================= */
.feature-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 20px;
}
.feature-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.feature-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow);
  border-color: rgba(124,58,237,0.45);
}
.feature-icon {
  width: 52px;
  height: 52px;
  background: linear-gradient(135deg, rgba(124,58,237,0.2), rgba(59,130,246,0.2));
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 16px;
  border: 1px solid rgba(124,58,237,0.2);
}
.feature-title {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 8px;
}
.feature-desc { font-size: 0.85rem; color: var(--text-muted); line-height: 1.6; }

/* =============================================
   EXPERT CARDS
   ============================================= */
.expert-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 20px;
}
.expert-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 20px;
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition);
}
.expert-card:hover {
  transform: translateY(-5px);
  box-shadow: 0 8px 32px rgba(124,58,237,0.22);
}
.expert-avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  margin: 0 auto 14px;
  border: 3px solid var(--primary);
  object-fit: cover;
  background: linear-gradient(135deg, var(--primary-dark), var(--primary));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  overflow: hidden;
}
.expert-name { font-size: 1rem; font-weight: 700; margin-bottom: 4px; }
.expert-role { font-size: 0.8rem; color: var(--primary-light); margin-bottom: 10px; }
.expert-desc { font-size: 0.8rem; color: var(--text-muted); margin-bottom: 16px; line-height: 1.6; }
.expert-btns { display: flex; gap: 8px; justify-content: center; }
.expert-btns a {
  font-size: 0.75rem;
  padding: 5px 12px;
  border-radius: 6px;
  font-weight: 600;
}
.btn-tag {
  background: rgba(124,58,237,0.15);
  color: var(--primary-light);
  border: 1px solid rgba(124,58,237,0.3);
}
.btn-tag:hover { background: rgba(124,58,237,0.3); color: var(--primary-light); }

/* =============================================
   REVIEW CARDS
   ============================================= */
.review-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 20px;
}
.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  position: relative;
}
.review-card::before {
  content: '"';
  position: absolute;
  top: 12px;
  right: 18px;
  font-size: 4rem;
  color: rgba(124,58,237,0.15);
  font-family: serif;
  line-height: 1;
}
.review-stars { color: #FBBF24; font-size: 0.85rem; margin-bottom: 10px; }
.review-text { font-size: 0.88rem; color: var(--text-muted); line-height: 1.7; margin-bottom: 16px; }
.review-author { display: flex; align-items: center; gap: 10px; }
.review-avatar {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}
.review-name { font-size: 0.88rem; font-weight: 700; }
.review-date { font-size: 0.75rem; color: var(--text-muted); }

/* =============================================
   FAQ
   ============================================= */
.faq-list { max-width: 800px; margin: 0 auto; }
.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 12px;
  overflow: hidden;
  background: var(--bg-card);
}
.faq-question {
  width: 100%;
  background: none;
  color: var(--text-main);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 18px 20px;
  text-align: left;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  transition: background var(--transition);
}
.faq-question:hover { background: rgba(124,58,237,0.08); }
.faq-question.active { background: rgba(124,58,237,0.1); color: var(--primary-light); }
.faq-icon {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: rgba(124,58,237,0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
  transition: transform var(--transition);
}
.faq-question.active .faq-icon { transform: rotate(45deg); }
.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.3s;
  padding: 0 20px;
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.8;
}
.faq-answer.open { max-height: 300px; padding: 0 20px 18px; }

/* =============================================
   PARTNER LOGOS
   ============================================= */
.partner-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
  align-items: center;
}
.partner-logo {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 12px 22px;
  font-size: 0.88rem;
  font-weight: 700;
  color: var(--text-muted);
  transition: border-color var(--transition), color var(--transition);
}
.partner-logo:hover { border-color: var(--primary); color: var(--primary-light); }

/* =============================================
   STATS BAR
   ============================================= */
.stats-bar {
  background: linear-gradient(135deg, var(--primary-dark), #1a1035);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  max-width: 1280px;
  margin: 0 auto;
  padding: 32px 24px;
  gap: 20px;
}
.stat-item { text-align: center; }
.stat-num {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 900;
  background: linear-gradient(135deg, var(--primary-light), var(--accent-glow));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.stat-label { font-size: 0.82rem; color: var(--text-muted); margin-top: 4px; }

/* =============================================
   COMMUNITY / LIVE SECTION
   ============================================= */
.live-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(239,68,68,0.15);
  border: 1px solid rgba(239,68,68,0.4);
  color: #F87171;
  font-size: 0.75rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: 20px;
  letter-spacing: 0.05em;
}
.live-dot {
  width: 7px;
  height: 7px;
  background: #EF4444;
  border-radius: 50%;
  animation: pulse-red 1.5s infinite;
}
@keyframes pulse-red {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.8); }
}

/* =============================================
   CONTACT / QR
   ============================================= */
.contact-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 24px;
}
.contact-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 24px;
  text-align: center;
}
.contact-icon { font-size: 2.2rem; margin-bottom: 12px; }
.contact-title { font-size: 1rem; font-weight: 700; margin-bottom: 8px; }
.contact-info { font-size: 0.85rem; color: var(--text-muted); line-height: 1.8; }
.qr-box {
  width: 100px;
  height: 100px;
  background: #fff;
  border-radius: 10px;
  margin: 14px auto 0;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}
.qr-box img { width: 100%; height: 100%; object-fit: cover; }

/* =============================================
   SHARE BAR
   ============================================= */
.share-bar {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}
.share-label { font-size: 0.85rem; color: var(--text-muted); }
.share-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 16px;
  border-radius: 8px;
  font-size: 0.82rem;
  font-weight: 600;
  transition: opacity var(--transition), transform var(--transition);
  color: #fff;
}
.share-btn:hover { opacity: 0.85; transform: translateY(-1px); color: #fff; }
.share-wechat { background: #07C160; }
.share-weibo { background: #E6162D; }
.share-douyin { background: #000; border: 1px solid #333; }
.share-bilibili { background: #00A1D6; }

/* =============================================
   HOW-TO GUIDE
   ============================================= */
.howto-steps {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 20px;
  counter-reset: step;
}
.howto-step {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 20px;
  position: relative;
  counter-increment: step;
}
.howto-step::before {
  content: counter(step);
  position: absolute;
  top: -14px;
  left: 20px;
  width: 28px;
  height: 28px;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 800;
  color: #fff;
  text-align: center;
  line-height: 28px;
}
.howto-title { font-size: 0.95rem; font-weight: 700; margin-bottom: 8px; margin-top: 6px; }
.howto-desc { font-size: 0.82rem; color: var(--text-muted); line-height: 1.6; }

/* =============================================
   BREADCRUMB
   ============================================= */
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 0.82rem;
  color: var(--text-muted);
  padding: 14px 24px;
  max-width: 1280px;
  margin: 0 auto;
}
.breadcrumb a { color: var(--text-muted); }
.breadcrumb a:hover { color: var(--primary-light); }
.breadcrumb .sep { color: rgba(255,255,255,0.2); }
.breadcrumb .current { color: var(--primary-light); }

/* =============================================
   FOOTER
   ============================================= */
.site-footer {
  background: var(--primary-dark);
  border-top: 1px solid var(--border);
  padding: 56px 24px 24px;
}
.footer-inner {
  max-width: 1280px;
  margin: 0 auto;
}
.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 40px;
}
.footer-brand .logo-text { font-size: 1.3rem; }
.footer-brand p {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-top: 12px;
  line-height: 1.7;
  max-width: 280px;
}
.footer-col h4 {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 16px;
}
.footer-col ul li { margin-bottom: 8px; }
.footer-col ul li a {
  font-size: 0.83rem;
  color: var(--text-muted);
  transition: color var(--transition);
}
.footer-col ul li a:hover { color: var(--primary-light); }
.footer-qr-row {
  display: flex;
  gap: 20px;
  margin-top: 16px;
}
.footer-qr-item { text-align: center; }
.footer-qr-item .qr-box { width: 80px; height: 80px; margin: 0 auto 6px; }
.footer-qr-item span { font-size: 0.72rem; color: var(--text-muted); }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
}
.footer-copy { font-size: 0.8rem; color: var(--text-muted); }
.footer-links { display: flex; gap: 16px; }
.footer-links a { font-size: 0.8rem; color: var(--text-muted); }
.footer-links a:hover { color: var(--primary-light); }
.footer-update { font-size: 0.78rem; color: var(--text-muted); }

/* =============================================
   PAGE HERO (内页)
   ============================================= */
.page-hero {
  background: linear-gradient(135deg, var(--primary-dark) 0%, #1a1035 100%);
  padding: 56px 24px;
  border-bottom: 1px solid var(--border);
}
.page-hero-inner {
  max-width: 1280px;
  margin: 0 auto;
}
.page-hero h1 {
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 900;
  margin-bottom: 10px;
}
.page-hero p { font-size: 0.95rem; color: var(--text-muted); max-width: 560px; }

/* =============================================
   TAG PILLS
   ============================================= */
.tag-list { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 10px; }
.tag-pill {
  background: rgba(124,58,237,0.12);
  border: 1px solid rgba(124,58,237,0.25);
  color: var(--primary-light);
  font-size: 0.75rem;
  font-weight: 600;
  padding: 4px 12px;
  border-radius: 20px;
  transition: background var(--transition);
}
.tag-pill:hover { background: rgba(124,58,237,0.25); }

/* =============================================
   MODAL (video popup)
   ============================================= */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.85);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s;
}
.modal-overlay.open { opacity: 1; pointer-events: all; }
.modal-box {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  max-width: 640px;
  width: 100%;
  position: relative;
  transform: scale(0.95);
  transition: transform 0.3s;
}
.modal-overlay.open .modal-box { transform: scale(1); }
.modal-close {
  position: absolute;
  top: 14px;
  right: 14px;
  background: rgba(255,255,255,0.08);
  color: var(--text-main);
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  transition: background var(--transition);
}
.modal-close:hover { background: rgba(255,255,255,0.15); }
.modal-video-wrap {
  aspect-ratio: 16/9;
  background: #000;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
  overflow: hidden;
}
.modal-video-wrap video { width: 100%; height: 100%; }
.modal-title { font-size: 1rem; font-weight: 700; margin-bottom: 6px; }
.modal-meta { font-size: 0.82rem; color: var(--text-muted); }

/* =============================================
   RESPONSIVE
   ============================================= */
@media (max-width: 1024px) {
  .footer-top { grid-template-columns: 1fr 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 768px) {
  .main-nav { display: none; position: absolute; top: 68px; left: 0; right: 0; background: rgba(15,10,30,0.97); flex-direction: column; padding: 16px; gap: 4px; border-bottom: 1px solid var(--border); }
  .main-nav.open { display: flex; }
  .main-nav a { padding: 10px 16px; border-radius: 8px; }
  .hamburger { display: flex; }
  .search-wrap { min-width: 140px; }
  .footer-top { grid-template-columns: 1fr; gap: 28px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .hero { min-height: 420px; }
  .hero-content { padding: 60px 20px; }
  .section { padding: 48px 20px; }
}
@media (max-width: 480px) {
  .header-inner { gap: 10px; }
  .search-wrap { min-width: 100px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 12px; }
  .video-grid { grid-template-columns: 1fr; }
}

/* =============================================
   ANIMATIONS
   ============================================= */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(24px); }
  to { opacity: 1; transform: translateY(0); }
}
.fade-in { animation: fadeInUp 0.6s ease both; }
.fade-in-delay-1 { animation-delay: 0.1s; }
.fade-in-delay-2 { animation-delay: 0.2s; }
.fade-in-delay-3 { animation-delay: 0.3s; }

/* =============================================
   GRADIENT DIVIDER
   ============================================= */
.gradient-divider {
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--primary), var(--accent), transparent);
  margin: 0;
}

/* =============================================
   NOTICE BAR
   ============================================= */
.notice-bar {
  background: linear-gradient(90deg, var(--primary-dark), rgba(124,58,237,0.3), var(--primary-dark));
  border-bottom: 1px solid var(--border);
  padding: 8px 24px;
  text-align: center;
  font-size: 0.82rem;
  color: var(--text-light);
}
.notice-bar a { color: var(--primary-light); font-weight: 600; }

/* =============================================
   IMAGE GALLERY
   ============================================= */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 12px;
}
.gallery-item {
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 3/4;
  cursor: pointer;
  position: relative;
}
.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.4s ease;
}
.gallery-item:hover img { transform: scale(1.06); }
.gallery-item-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(45,27,105,0.7) 0%, transparent 50%);
  opacity: 0;
  transition: opacity var(--transition);
  display: flex;
  align-items: flex-end;
  padding: 14px;
}
.gallery-item:hover .gallery-item-overlay { opacity: 1; }
.gallery-item-label { font-size: 0.8rem; font-weight: 600; color: #fff; }

/* =============================================
   TOOL CARDS
   ============================================= */
.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 20px;
}
.tool-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  display: flex;
  gap: 16px;
  align-items: flex-start;
  transition: transform var(--transition), box-shadow var(--transition);
}
.tool-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow);
}
.tool-icon {
  width: 48px;
  height: 48px;
  background: linear-gradient(135deg, rgba(124,58,237,0.2), rgba(59,130,246,0.2));
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  flex-shrink: 0;
}
.tool-info h4 { font-size: 0.95rem; font-weight: 700; margin-bottom: 6px; }
.tool-info p { font-size: 0.82rem; color: var(--text-muted); line-height: 1.6; }