/* ============================================================
   91 官方网站 - 样式表 (Original Theme: Soul Red Rotary Dark)
   Domain: y5hu90.cn
   Automotive repair & tuning media company + video community
============================================================ */

:root {
  --bg-base: #0c0d10;
  --bg-elevated: #13141a;
  --bg-card: #1a1b24;
  --bg-card-hover: #222332;
  --bg-input: #111218;
  --border-subtle: rgba(255, 255, 255, 0.07);
  --border-red: rgba(214, 48, 49, 0.4);
  --soul-red: #c0392b;
  --soul-red-bright: #d63031;
  --soul-red-light: #ff7675;
  --racing-gold: #ffd54f;
  --racing-yellow: #e0f800;
  --carbon: #2b2c3a;
  --text-primary: #f2f3f7;
  --text-secondary: #a0a2b4;
  --text-muted: #6b6d82;
  --text-dim: #4a4c60;
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;
  --radius-full: 9999px;
  --shadow-sm: 0 4px 16px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 10px 32px rgba(0, 0, 0, 0.55);
  --shadow-red: 0 12px 40px rgba(214, 48, 49, 0.35);
  --shadow-gold: 0 10px 30px rgba(255, 213, 79, 0.25);
  --gradient-soul: linear-gradient(135deg, #b71c1c 0%, #d63031 50%, #ff7675 100%);
  --gradient-gold: linear-gradient(135deg, #ffd54f 0%, #ffb300 100%);
  --gradient-dark: linear-gradient(180deg, #13141a 0%, #0c0d10 100%);
  --container-w: 1200px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  background: var(--bg-base);
  color: var(--text-primary);
  line-height: 1.75;
  font-size: 15px;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

img, video {
  max-width: 100%;
  display: block;
}

button {
  font-family: inherit;
}

.container {
  width: 100%;
  max-width: var(--container-w);
  margin: 0 auto;
  padding: 0 20px;
}

/* ============================================================
   Typography helpers
============================================================ */
.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 2.5px;
  text-transform: uppercase;
  color: var(--racing-gold);
  margin-bottom: 8px;
}
.section-tag::before {
  content: "";
  display: inline-block;
  width: 18px;
  height: 2px;
  background: var(--soul-red-bright);
}
.section-title {
  font-size: clamp(26px, 3.2vw, 40px);
  font-weight: 900;
  letter-spacing: 0.5px;
  line-height: 1.25;
}
.brand-hl {
  background: var(--gradient-soul);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.section-desc {
  color: var(--text-secondary);
  font-size: 14.5px;
  max-width: 760px;
  margin-top: 10px;
}
.section-head {
  margin-bottom: 34px;
}

/* ============================================================
   Header & Navigation
============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 900;
  background: rgba(12, 13, 16, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--border-subtle);
}
.site-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 12px 20px;
  max-width: var(--container-w);
  margin: 0 auto;
}
.logo-link {
  display: inline-flex;
  align-items: center;
}
.logo-link img {
  height: 48px;
  width: auto;
}
.main-nav ul {
  display: flex;
  list-style: none;
  gap: 4px;
  align-items: center;
}
.nav-link {
  display: block;
  padding: 8px 14px;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  border-radius: var(--radius-sm);
  transition: color .2s, background .2s;
  letter-spacing: 0.3px;
}
.nav-link:hover, .nav-link.active {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.05);
}
.nav-link.active {
  color: var(--racing-gold);
}
.btn-header-join {
  background: var(--gradient-soul);
  color: #fff;
  font-weight: 800;
  font-size: 13px;
  padding: 9px 18px;
  border-radius: var(--radius-full);
  letter-spacing: 1px;
  box-shadow: var(--shadow-red);
  transition: transform .2s, box-shadow .2s;
}
.btn-header-join:hover {
  transform: translateY(-2px);
  box-shadow: 0 16px 48px rgba(214, 48, 49, 0.5);
}
.mobile-menu-btn {
  display: none;
  width: 42px;
  height: 42px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-size: 20px;
  cursor: pointer;
}

/* ============================================================
   Search bar below nav (JS-controlled cosmetic search)
============================================================ */
.search-bar-wrap {
  background: linear-gradient(180deg, #13141a 0%, #0f1013 100%);
  border-bottom: 1px solid var(--border-subtle);
  padding: 10px 0 12px;
}
.search-form {
  display: flex;
  gap: 10px;
  max-width: 680px;
  margin: 0 auto;
}
.search-input-wrap {
  position: relative;
  flex: 1;
}
.search-icon-left {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  font-size: 14px;
  opacity: .5;
  pointer-events: none;
}
.search-input {
  width: 100%;
  background: var(--bg-input);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  padding: 10px 16px 10px 40px;
  color: var(--text-primary);
  font-size: 13.5px;
  outline: none;
  transition: border-color .2s;
}
.search-input:focus {
  border-color: var(--soul-red-bright);
}
.search-input::placeholder {
  color: var(--text-muted);
}
.search-btn {
  background: var(--gradient-soul);
  border: none;
  color: #fff;
  font-weight: 800;
  font-size: 13px;
  padding: 10px 22px;
  border-radius: var(--radius-full);
  cursor: pointer;
  letter-spacing: 1px;
  transition: transform .2s;
}
.search-btn:hover {
  transform: translateY(-1px);
}
.search-hot {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  align-items: center;
  max-width: 680px;
  margin: 8px auto 0;
  font-size: 11.5px;
  color: var(--text-muted);
}
.hot-tag {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.06);
  padding: 2px 9px;
  border-radius: var(--radius-full);
  color: var(--text-secondary);
  cursor: pointer;
  transition: background .2s, color .2s;
}
.hot-tag:hover {
  background: rgba(214, 48, 49, 0.18);
  color: var(--soul-red-light);
}
.hot-tag.fire {
  color: var(--racing-gold);
  border-color: rgba(255, 213, 79, 0.3);
}

/* ============================================================
   Hero Section
============================================================ */
.hero-section {
  position: relative;
  min-height: 640px;
  display: flex;
  align-items: center;
  background-image: url("../images/hero-banner.jpg");
  background-size: cover;
  background-position: center 30%;
  overflow: hidden;
  border-bottom: 1px solid var(--border-subtle);
}
.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(12, 13, 16, 0.96) 0%, rgba(12, 13, 16, 0.86) 45%, rgba(12, 13, 16, 0.35) 100%),
              linear-gradient(180deg, transparent 40%, rgba(12, 13, 16, 0.95) 100%);
}
.hero-glow-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(110px);
  pointer-events: none;
  opacity: .32;
}
.hero-glow-blob.red {
  width: 480px;
  height: 480px;
  background: var(--soul-red);
  top: -60px;
  left: 20%;
}
.hero-glow-blob.gold {
  width: 320px;
  height: 320px;
  background: var(--racing-gold);
  bottom: -40px;
  right: 15%;
  opacity: .18;
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 720px;
  padding: 80px 0 70px;
}
.hero-badge-live {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: rgba(214, 48, 49, 0.16);
  border: 1px solid rgba(214, 48, 49, 0.45);
  color: var(--soul-red-light);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 2px;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  margin-bottom: 20px;
  text-transform: uppercase;
}
.live-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--soul-red-bright);
  box-shadow: 0 0 10px var(--soul-red-bright);
  animation: pulse-live 1.6s infinite;
}
@keyframes pulse-live {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: .4; transform: scale(1.4); }
}
.hero-title {
  font-size: clamp(34px, 5.2vw, 56px);
  font-weight: 950;
  line-height: 1.15;
  letter-spacing: 1px;
}
.glow-word {
  color: var(--racing-gold);
  text-shadow: 0 0 28px rgba(255, 213, 79, 0.45);
}
.hero-subtitle {
  margin-top: 18px;
  font-size: 15.5px;
  color: var(--text-secondary);
  line-height: 1.85;
}
.hero-subtitle strong {
  color: var(--soul-red-light);
  font-weight: 900;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 28px;
}
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--gradient-soul);
  color: #fff;
  font-weight: 900;
  font-size: 14.5px;
  padding: 13px 26px;
  border-radius: var(--radius-full);
  letter-spacing: 1px;
  box-shadow: var(--shadow-red);
  transition: transform .2s, box-shadow .2s;
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 56px rgba(214, 48, 49, 0.55);
}
.btn-secondary {
  display: inline-flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  color: var(--text-primary);
  font-weight: 700;
  font-size: 14.5px;
  padding: 13px 22px;
  border-radius: var(--radius-full);
  transition: border-color .2s, background .2s;
}
.btn-secondary:hover {
  border-color: var(--soul-red-bright);
  background: rgba(214, 48, 49, 0.1);
}
.hero-stats {
  display: flex;
  flex-wrap: wrap;
  gap: 32px;
  margin-top: 42px;
  padding-top: 30px;
  border-top: 1px solid var(--border-subtle);
}
.hero-stat-item .stat-num {
  font-size: 30px;
  font-weight: 950;
  line-height: 1;
  color: var(--text-primary);
  letter-spacing: 0.5px;
}
.hero-stat-item .stat-num span {
  font-size: 14px;
  color: var(--soul-red-light);
  margin-left: 2px;
}
.hero-stat-item .stat-label {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
}

/* ============================================================
   Section base
============================================================ */
.section {
  padding: 72px 0;
  position: relative;
}
.section-alt {
  background: var(--bg-elevated);
}
.section-border {
  border-bottom: 1px solid var(--border-subtle);
}

/* ============================================================
   Video Cards Grid (Section 1: 91修车传媒)
============================================================ */
.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 28px;
}
.filter-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 700;
  padding: 8px 16px;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all .2s;
}
.filter-btn:hover, .filter-btn.active {
  color: #fff;
  border-color: var(--soul-red-bright);
  background: rgba(214, 48, 49, 0.18);
}
.filter-btn.active {
  box-shadow: 0 0 20px rgba(214, 48, 49, 0.3);
}
.video-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.video-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: transform .25s, box-shadow .25s, border-color .25s;
  display: flex;
  flex-direction: column;
}
.video-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-red);
}
.card-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: #000;
  cursor: pointer;
}
.card-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .4s ease;
}
.video-card:hover .card-thumb img {
  transform: scale(1.05);
}
.card-badge-wrap {
  position: absolute;
  top: 10px;
  left: 10px;
  display: flex;
  gap: 6px;
}
.badge-live {
  background: var(--soul-red-bright);
  color: #fff;
  font-size: 11px;
  font-weight: 900;
  padding: 3px 8px;
  border-radius: var(--radius-xs);
  letter-spacing: 1px;
}
.badge-hot {
  background: var(--gradient-gold);
  color: #1a1a22;
  font-size: 11px;
  font-weight: 900;
  padding: 3px 8px;
  border-radius: var(--radius-xs);
}
.badge-ep {
  background: rgba(0, 0, 0, 0.7);
  color: var(--text-secondary);
  font-size: 11px;
  padding: 3px 8px;
  border-radius: var(--radius-xs);
  border: 1px solid rgba(255, 255, 255, 0.15);
}
.card-duration {
  position: absolute;
  bottom: 8px;
  right: 10px;
  background: rgba(0, 0, 0, 0.8);
  font-size: 11px;
  font-weight: 800;
  padding: 2px 7px;
  border-radius: var(--radius-xs);
  letter-spacing: 1px;
}
.card-play-overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  background: rgba(0, 0, 0, 0.35);
  opacity: 0;
  transition: opacity .25s;
}
.card-play-btn {
  width: 58px;
  height: 58px;
  border-radius: 50%;
  background: var(--gradient-soul);
  box-shadow: 0 0 30px rgba(214, 48, 49, 0.7);
  position: relative;
  transition: transform .2s;
}
.card-play-btn::after {
  content: "";
  position: absolute;
  left: 24px;
  top: 18px;
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 11px 0 11px 18px;
  border-color: transparent transparent transparent #fff;
}
.video-card:hover .card-play-overlay {
  opacity: 1;
}
.video-card:hover .card-play-btn {
  transform: scale(1.08);
}
.card-body {
  padding: 16px 18px 18px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.card-title {
  font-size: 15px;
  font-weight: 800;
  line-height: 1.5;
  color: var(--text-primary);
  transition: color .2s;
}
.card-title:hover {
  color: var(--soul-red-light);
}
.card-desc {
  font-size: 12.5px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-top: 6px;
  flex: 1;
}
.card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 12px;
  font-size: 11.5px;
  color: var(--text-muted);
}
.card-stats {
  display: flex;
  gap: 12px;
}
.card-tag {
  background: rgba(255, 213, 79, 0.12);
  color: var(--racing-gold);
  border: 1px solid rgba(255, 213, 79, 0.3);
  font-size: 11px;
  font-weight: 800;
  padding: 2px 8px;
  border-radius: var(--radius-xs);
  letter-spacing: 0.5px;
}
.card-footer-cta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 12px;
  padding-top: 10px;
  border-top: 1px solid var(--border-subtle);
  font-size: 12px;
}
.card-play-cta {
  color: var(--soul-red-light);
  font-weight: 800;
  cursor: pointer;
  transition: transform .2s;
}
.card-play-cta:hover {
  transform: translateX(3px);
}
.card-subpage-cta {
  color: var(--text-muted);
  transition: color .2s;
}
.card-subpage-cta:hover {
  color: var(--text-primary);
}

/* ============================================================
   Entertainment Section (91娱乐专区) - vertical reel grid
============================================================ */
.reel-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}
.reel-card {
  position: relative;
  aspect-ratio: 9/16;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: #000;
  cursor: pointer;
  border: 1px solid var(--border-subtle);
  transition: transform .25s, box-shadow .25s, border-color .25s;
}
.reel-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-red);
}
.reel-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.reel-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, rgba(0, 0, 0, 0.25) 0%, transparent 40%, rgba(12, 13, 16, 0.95) 100%);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  padding: 14px;
}
.reel-chip {
  align-self: flex-start;
  background: var(--soul-red-bright);
  color: #fff;
  font-size: 10.5px;
  font-weight: 900;
  padding: 3px 9px;
  border-radius: var(--radius-full);
  letter-spacing: 1px;
}
.reel-footer {
  display: flex;
  flex-direction: column;
  gap: 6px;
}
.reel-title {
  font-size: 14px;
  font-weight: 800;
  line-height: 1.45;
  color: #fff;
}
.reel-stats {
  display: flex;
  gap: 12px;
  font-size: 11.5px;
  color: var(--text-secondary);
}
.reel-play-icon {
  position: absolute;
  right: 14px;
  bottom: 80px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--gradient-soul);
  box-shadow: 0 0 24px rgba(214, 48, 49, 0.8);
  display: grid;
  place-items: center;
  transition: transform .2s;
}
.reel-play-icon::after {
  content: "";
  width: 0;
  height: 0;
  border-style: solid;
  border-width: 8px 0 8px 14px;
  border-color: transparent transparent transparent #fff;
  margin-left: 3px;
}
.reel-card:hover .reel-play-icon {
  transform: scale(1.12);
}
.soundbite-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 32px;
}
.soundbite {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-full);
  padding: 8px 18px;
  font-size: 12.5px;
  font-weight: 700;
  color: var(--text-secondary);
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.soundbite b {
  color: var(--racing-gold);
}

/* ============================================================
   AI Empowerment Section (91 AI赋能)
============================================================ */
.ai-layout {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 32px;
  align-items: center;
}
.ai-media {
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border-red);
  box-shadow: var(--shadow-red);
}
.ai-media img {
  width: 100%;
  height: auto;
}
.ai-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  margin-top: 18px;
}
.ai-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 20px;
  transition: border-color .2s, transform .2s;
}
.ai-card:hover {
  border-color: var(--border-red);
  transform: translateY(-3px);
}
.ai-card-num {
  font-size: 26px;
  font-weight: 950;
  color: var(--soul-red-bright);
  line-height: 1;
}
.ai-card-title {
  font-size: 15px;
  font-weight: 900;
  margin-top: 8px;
}
.ai-card-desc {
  font-size: 12.5px;
  color: var(--text-secondary);
  line-height: 1.7;
  margin-top: 6px;
}
.ai-pipeline {
  margin-top: 32px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 28px 30px;
}
.ai-pipeline-title {
  font-size: 16px;
  font-weight: 900;
  margin-bottom: 18px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.ai-pipeline-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}
.pipeline-step {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 16px 14px;
  position: relative;
}
.pipeline-step::after {
  content: "→";
  position: absolute;
  right: -13px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--soul-red-bright);
  font-size: 18px;
  font-weight: 900;
}
.pipeline-step:last-child::after {
  content: "";
}
.pipeline-num {
  font-size: 11px;
  font-weight: 900;
  color: var(--racing-gold);
  letter-spacing: 2px;
}
.pipeline-name {
  font-size: 13.5px;
  font-weight: 900;
  margin-top: 4px;
}
.pipeline-desc {
  font-size: 11.5px;
  color: var(--text-muted);
  line-height: 1.6;
  margin-top: 4px;
}

/* ============================================================
   Community Section (91修车社区)
============================================================ */
.community-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 26px;
}
.live-box {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
}
.live-player {
  position: relative;
  aspect-ratio: 16/9;
  background: #000;
}
.live-player video, .live-player img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.live-badge-corner {
  position: absolute;
  top: 12px;
  left: 12px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: rgba(0, 0, 0, 0.7);
  padding: 5px 12px;
  border-radius: var(--radius-full);
  font-size: 12px;
  font-weight: 900;
}
.live-viewers {
  position: absolute;
  top: 12px;
  right: 12px;
  background: rgba(0, 0, 0, 0.7);
  padding: 5px 12px;
  border-radius: var(--radius-full);
  font-size: 12px;
  color: var(--text-secondary);
}
.live-info {
  padding: 20px 22px;
}
.live-info h3 {
  font-size: 17px;
  font-weight: 900;
}
.live-info p {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-top: 8px;
}
.danmaku-wall {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 22px;
  display: flex;
  flex-direction: column;
}
.danmaku-wall h3 {
  font-size: 17px;
  font-weight: 900;
  display: flex;
  align-items: center;
  gap: 10px;
}
.danmaku-lanes {
  margin-top: 16px;
  height: 250px;
  position: relative;
  overflow: hidden;
  background: var(--bg-input);
  border-radius: var(--radius-md);
  padding: 10px;
}
.danmaku-row {
  display: flex;
  gap: 24px;
  white-space: nowrap;
  animation: danmaku-scroll 18s linear infinite;
  margin: 10px 0;
  font-size: 13px;
  color: var(--text-secondary);
}
.danmaku-row:nth-child(2) {
  animation-duration: 22s;
  animation-delay: -7s;
  color: var(--soul-red-light);
}
.danmaku-row:nth-child(3) {
  animation-duration: 26s;
  animation-delay: -13s;
  color: var(--racing-gold);
}
.danmaku-msg {
  display: inline-block;
  padding: 4px 10px;
  background: rgba(255, 255, 255, 0.04);
  border-radius: var(--radius-full);
}
@keyframes danmaku-scroll {
  0% { transform: translateX(100%); }
  100% { transform: translateX(-100%); }
}
.danmaku-input-row {
  display: flex;
  gap: 10px;
  margin-top: 14px;
}
.danmaku-input-row input {
  flex: 1;
  background: var(--bg-input);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-full);
  padding: 9px 16px;
  color: var(--text-primary);
  font-size: 13px;
  outline: none;
}
.danmaku-input-row button {
  background: var(--gradient-soul);
  border: none;
  color: #fff;
  font-weight: 800;
  font-size: 13px;
  padding: 9px 20px;
  border-radius: var(--radius-full);
  cursor: pointer;
}
.community-subgrid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 32px;
}
.comm-col-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 22px;
  transition: border-color .2s;
}
.comm-col-card:hover {
  border-color: var(--border-red);
}
.comm-col-icon {
  font-size: 28px;
}
.comm-col-title {
  font-size: 16px;
  font-weight: 900;
  margin-top: 8px;
}
.comm-col-desc {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.8;
  margin-top: 8px;
}
.comm-col-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 14px;
  font-size: 12.5px;
  font-weight: 800;
  color: var(--soul-red-light);
}

/* ============================================================
   Experts Section (91专家展示)
============================================================ */
.experts-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.expert-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 22px 20px 20px;
  display: flex;
  flex-direction: column;
  transition: transform .25s, border-color .25s;
}
.expert-card:hover {
  transform: translateY(-5px);
  border-color: var(--border-red);
}
.expert-avatar-wrap {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  overflow: hidden;
  margin: 0 auto;
  border: 3px solid var(--soul-red-bright);
  box-shadow: 0 0 20px rgba(214, 48, 49, 0.4);
}
.expert-avatar-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.expert-name {
  font-size: 18px;
  font-weight: 950;
  text-align: center;
  margin-top: 14px;
}
.expert-role {
  font-size: 12px;
  color: var(--racing-gold);
  font-weight: 800;
  text-align: center;
  letter-spacing: 0.5px;
  margin-top: 2px;
}
.expert-bio {
  font-size: 12.5px;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-top: 12px;
  flex: 1;
}
.expert-stats {
  display: flex;
  justify-content: space-around;
  margin-top: 14px;
  padding-top: 12px;
  border-top: 1px solid var(--border-subtle);
  text-align: center;
}
.expert-stat-num {
  font-size: 16px;
  font-weight: 950;
  color: var(--text-primary);
}
.expert-stat-label {
  font-size: 11px;
  color: var(--text-muted);
}
.expert-award {
  margin-top: 12px;
  font-size: 11.5px;
  color: var(--text-muted);
  line-height: 1.6;
}
.expert-award strong {
  color: var(--soul-red-light);
}
.expert-ctas {
  display: flex;
  gap: 8px;
  margin-top: 16px;
}
.expert-btn {
  flex: 1;
  text-align: center;
  font-size: 12px;
  font-weight: 800;
  padding: 8px 6px;
  border-radius: var(--radius-full);
}
.expert-btn.primary {
  background: var(--gradient-soul);
  color: #fff;
}
.expert-btn.outline {
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
}
.expert-btn.outline:hover {
  border-color: var(--soul-red-bright);
  color: var(--text-primary);
}

/* ============================================================
   Reviews Section (91用户口碑)
============================================================ */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.review-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 22px;
  display: flex;
  flex-direction: column;
}
.review-stars {
  color: var(--racing-gold);
  font-size: 15px;
  letter-spacing: 2px;
}
.review-body {
  font-size: 13.5px;
  color: var(--text-secondary);
  line-height: 1.85;
  margin-top: 10px;
  flex: 1;
}
.review-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 16px;
  padding-top: 12px;
  border-top: 1px solid var(--border-subtle);
  font-size: 12px;
}
.review-author {
  font-weight: 800;
  color: var(--text-primary);
}
.review-vehicle {
  color: var(--soul-red-light);
  font-weight: 700;
}
.review-date {
  color: var(--text-muted);
}

/* ============================================================
   How-To Section
============================================================ */
.howto-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}
.howto-step {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 24px 20px;
  position: relative;
}
.howto-num {
  font-size: 34px;
  font-weight: 950;
  color: var(--soul-red-bright);
  line-height: 1;
  opacity: .9;
}
.howto-title {
  font-size: 15.5px;
  font-weight: 900;
  margin-top: 10px;
}
.howto-desc {
  font-size: 12.5px;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-top: 8px;
}
.howto-cta {
  display: inline-block;
  margin-top: 14px;
  font-size: 12px;
  font-weight: 800;
  color: var(--racing-gold);
}

/* ============================================================
   Partner Logo Wall
============================================================ */
.partner-wall {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 14px;
}
.partner-cell {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 20px 14px;
  text-align: center;
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 1.5px;
  color: var(--text-secondary);
  transition: border-color .2s, color .2s;
}
.partner-cell:hover {
  border-color: var(--soul-red-bright);
  color: var(--text-primary);
}

/* ============================================================
   FAQ Section
============================================================ */
.faq-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
}
.faq-q {
  padding: 18px 20px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  font-weight: 800;
  font-size: 14.5px;
  transition: color .2s;
  user-select: none;
}
.faq-q:hover {
  color: var(--soul-red-light);
}
.faq-icon {
  font-size: 20px;
  color: var(--soul-red-bright);
  transition: transform .25s;
  line-height: 1;
}
.faq-item.active .faq-icon {
  transform: rotate(45deg);
}
.faq-a {
  padding: 0 20px 20px;
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.85;
  display: none;
}
.faq-item.active .faq-a {
  display: block;
}

/* ============================================================
   Contact Section (91联系我们)
============================================================ */
.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 32px;
}
.contact-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 30px;
}
.contact-card h3 {
  font-size: 18px;
  font-weight: 900;
  margin-bottom: 16px;
}
.storefront-img {
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: 20px;
  border: 1px solid var(--border-subtle);
}
.contact-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 12px;
  font-size: 13.5px;
}
.contact-list li {
  display: flex;
  gap: 10px;
}
.contact-list strong {
  color: var(--racing-gold);
  min-width: 90px;
}
.contact-list a {
  color: var(--text-secondary);
}
.contact-list a:hover {
  color: var(--text-primary);
}
.qr-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 24px;
}
.qr-cell {
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 14px;
  text-align: center;
}
.qr-cell img {
  width: 100%;
  aspect-ratio: 1/1;
  border-radius: var(--radius-xs);
  margin: 0 auto;
}
.qr-label {
  font-size: 12px;
  font-weight: 800;
  margin-top: 8px;
}
.qr-sub {
  font-size: 10.5px;
  color: var(--text-muted);
}
.wechat-box {
  margin-top: 18px;
  background: var(--bg-elevated);
  border: 1px dashed var(--border-red);
  border-radius: var(--radius-md);
  padding: 14px 18px;
  font-size: 12.5px;
  color: var(--text-secondary);
}
.wechat-box strong {
  color: var(--soul-red-light);
}

/* ============================================================
   Social Share Section
============================================================ */
.share-section {
  text-align: center;
  padding: 42px 0 10px;
}
.share-bar {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 10px;
  margin-top: 18px;
}
.share-btn {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  font-size: 13px;
  font-weight: 800;
  padding: 10px 20px;
  border-radius: var(--radius-full);
  cursor: pointer;
  transition: all .2s;
  display: inline-flex;
  align-items: center;
  gap: 8px;
}
.share-btn:hover {
  transform: translateY(-2px);
  color: #fff;
}
.share-btn.wechat:hover {
  background: #07c160;
  border-color: #07c160;
}
.share-btn.weibo:hover {
  background: #e6162d;
  border-color: #e6162d;
}
.share-btn.douyin:hover {
  background: #fe2c55;
  border-color: #fe2c55;
}
.share-btn.bilibili:hover {
  background: #00aeec;
  border-color: #00aeec;
}

/* ============================================================
   MCP Frontend Microservice Panel
============================================================ */
.mcp-panel {
  margin-top: 40px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 26px 28px;
}
.mcp-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 20px;
}
.mcp-title {
  font-size: 16px;
  font-weight: 900;
  display: flex;
  align-items: center;
  gap: 10px;
}
.mcp-status {
  font-size: 12px;
  color: #2ed573;
  font-weight: 800;
  background: rgba(46, 213, 115, 0.12);
  border: 1px solid rgba(46, 213, 115, 0.35);
  padding: 4px 12px;
  border-radius: var(--radius-full);
}
.mcp-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}
.mcp-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 16px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}
.mcp-svc-name {
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 12.5px;
  font-weight: 800;
  color: var(--soul-red-light);
  word-break: break-all;
}
.mcp-svc-desc {
  font-size: 11.5px;
  color: var(--text-muted);
  line-height: 1.6;
  margin: 8px 0 12px;
}
.mcp-btn {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-subtle);
  color: var(--text-secondary);
  font-size: 11.5px;
  font-weight: 800;
  padding: 6px 12px;
  border-radius: var(--radius-full);
  cursor: pointer;
  align-self: flex-start;
  transition: all .2s;
}
.mcp-btn:hover {
  background: rgba(214, 48, 49, 0.2);
  border-color: var(--border-red);
  color: #fff;
}
.mcp-note {
  margin-top: 16px;
  font-size: 11px;
  color: var(--text-dim);
  line-height: 1.7;
}

/* ============================================================
   SEO Keyword cloud
============================================================ */
.seo-cloud {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 24px 26px;
  font-size: 12px;
  line-height: 2.2;
  margin-top: 36px;
}
.seo-cloud-title {
  color: var(--racing-gold);
  font-weight: 800;
  margin-right: 10px;
}
.seo-cloud a {
  color: var(--text-muted);
  transition: color .2s;
}
.seo-cloud a:hover {
  color: var(--soul-red-light);
}

/* ============================================================
   Footer
============================================================ */
.site-footer {
  background: #08090b;
  border-top: 1px solid var(--border-subtle);
  padding: 56px 0 32px;
  margin-top: 80px;
  font-size: 13px;
}
.footer-top {
  display: grid;
  grid-template-columns: 1.35fr 1fr 1fr 1fr;
  gap: 36px;
}
.footer-logo {
  display: flex;
  align-items: center;
  gap: 12px;
}
.footer-logo img {
  height: 44px;
}
.footer-about {
  color: var(--text-secondary);
  line-height: 1.85;
  margin-top: 16px;
  font-size: 12.5px;
}
.footer-eeat {
  font-size: 11px;
  color: var(--text-dim);
  line-height: 1.8;
  margin-top: 12px;
}
.footer-col-title {
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 1.5px;
  color: var(--text-primary);
  text-transform: uppercase;
  margin-bottom: 14px;
}
.footer-links {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-links a {
  color: var(--text-secondary);
  transition: color .2s;
}
.footer-links a:hover {
  color: var(--soul-red-light);
}
.footer-contacts {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
  color: var(--text-secondary);
  font-size: 12.5px;
}
.footer-contacts strong {
  color: var(--racing-gold);
}
.footer-qr-row {
  display: flex;
  gap: 14px;
  margin-top: 16px;
}
.footer-qr-item {
  text-align: center;
  font-size: 11px;
  color: var(--text-muted);
}
.footer-qr-item img {
  width: 90px;
  height: 90px;
  border-radius: var(--radius-xs);
  border: 1px solid var(--border-subtle);
}
.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 14px;
  margin-top: 40px;
  padding-top: 24px;
  border-top: 1px solid var(--border-subtle);
  font-size: 12px;
  color: var(--text-muted);
}
.footer-copy a {
  color: var(--text-secondary);
}
.footer-update-time {
  font-size: 12px;
  color: var(--text-secondary);
}
.footer-update-time span {
  color: var(--racing-gold);
  font-weight: 800;
}
.footer-bottom-links {
  display: flex;
  gap: 16px;
}
.footer-bottom-links a {
  color: var(--text-secondary);
}
.footer-bottom-links a:hover {
  color: var(--text-primary);
}

/* ============================================================
   Video Modal (click-to-play)
============================================================ */
.video-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.88);
  backdrop-filter: blur(10px);
  z-index: 1000;
  display: grid;
  place-items: center;
  padding: 20px;
  opacity: 0;
  visibility: hidden;
  transition: opacity .25s, visibility .25s;
}
.video-modal-backdrop.open {
  opacity: 1;
  visibility: visible;
}
.video-modal-box {
  width: 100%;
  max-width: 960px;
  background: var(--bg-card);
  border: 1px solid var(--border-red);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-red);
}
.video-modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 22px;
  border-bottom: 1px solid var(--border-subtle);
}
.video-modal-title {
  font-size: 15px;
  font-weight: 900;
  color: var(--text-primary);
}
.video-modal-close {
  background: transparent;
  border: none;
  color: var(--text-secondary);
  font-size: 26px;
  cursor: pointer;
  line-height: 1;
  padding: 0 4px;
  transition: color .2s;
}
.video-modal-close:hover {
  color: #fff;
}
.video-modal-player-wrap {
  position: relative;
  aspect-ratio: 16/9;
  background: #000;
}
.video-modal-player-wrap video {
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.video-modal-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 22px;
  font-size: 12px;
  color: var(--text-muted);
  border-top: 1px solid var(--border-subtle);
  background: var(--bg-elevated);
}
.modal-subpage-link {
  color: var(--soul-red-light);
  font-weight: 800;
}

/* ============================================================
   Toast
============================================================ */
.toast-msg {
  position: fixed;
  bottom: 26px;
  left: 50%;
  transform: translateX(-50%) translateY(30px);
  background: var(--bg-card);
  border: 1px solid var(--border-red);
  color: var(--text-primary);
  font-size: 13px;
  font-weight: 800;
  padding: 10px 22px;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-md);
  z-index: 1200;
  opacity: 0;
  pointer-events: none;
  transition: transform .25s, opacity .25s;
}
.toast-msg.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ============================================================
   Back to top
============================================================ */
.back-top-btn {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--gradient-soul);
  border: none;
  color: #fff;
  font-size: 16px;
  cursor: pointer;
  box-shadow: var(--shadow-red);
  z-index: 800;
  opacity: 0;
  visibility: hidden;
  transition: opacity .25s, visibility .25s, transform .2s;
}
.back-top-btn:hover {
  transform: translateY(-3px);
}
.back-top-btn.visible {
  opacity: 1;
  visibility: visible;
}

/* ============================================================
   Subpage layouts
============================================================ */
.page-hero {
  padding: 56px 0 40px;
  background: var(--gradient-dark);
  border-bottom: 1px solid var(--border-subtle);
}
.page-hero-title {
  font-size: clamp(30px, 4.2vw, 46px);
  font-weight: 950;
}
.page-hero-title span {
  background: var(--gradient-soul);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.page-hero-desc {
  font-size: 14.5px;
  color: var(--text-secondary);
  line-height: 1.85;
  max-width: 860px;
  margin-top: 12px;
}
.breadcrumb-nav {
  margin-top: 20px;
  font-size: 12px;
  color: var(--text-muted);
  display: flex;
  gap: 8px;
  align-items: center;
}
.breadcrumb-nav a {
  color: var(--text-secondary);
}
.breadcrumb-nav a:hover {
  color: var(--soul-red-light);
}

/* ============================================================
   Responsive
============================================================ */
@media (max-width: 1024px) {
  .video-grid { grid-template-columns: repeat(2, 1fr); }
  .reel-grid { grid-template-columns: repeat(3, 1fr); }
  .experts-grid { grid-template-columns: repeat(2, 1fr); }
  .howto-steps { grid-template-columns: repeat(2, 1fr); }
  .partner-wall { grid-template-columns: repeat(3, 1fr); }
  .mcp-grid { grid-template-columns: repeat(2, 1fr); }
  .ai-layout { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 30px; }
  .ai-pipeline-steps { grid-template-columns: repeat(2, 1fr); }
  .pipeline-step::after { content: ""; }
}

@media (max-width: 768px) {
  .main-nav { display: none; }
  .mobile-menu-btn { display: grid; place-items: center; }
  .main-nav.open {
    display: block;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border-subtle);
    padding: 14px 20px 20px;
  }
  .main-nav.open ul {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }
  .main-nav.open .nav-link { width: 100%; }
  .btn-header-join { display: none; }
  .hero-section { min-height: 520px; }
  .hero-stats { gap: 18px; }
  .video-grid { grid-template-columns: 1fr; }
  .reel-grid { grid-template-columns: repeat(2, 1fr); }
  .ai-cards { grid-template-columns: 1fr; }
  .community-grid { grid-template-columns: 1fr; }
  .community-subgrid { grid-template-columns: 1fr; }
  .experts-grid { grid-template-columns: 1fr; }
  .reviews-grid { grid-template-columns: 1fr; }
  .howto-steps { grid-template-columns: 1fr; }
  .faq-grid { grid-template-columns: 1fr; }
  .contact-layout { grid-template-columns: 1fr; }
  .partner-wall { grid-template-columns: repeat(2, 1fr); }
  .footer-top { grid-template-columns: 1fr; }
  .mcp-grid { grid-template-columns: 1fr; }
  .ai-pipeline-steps { grid-template-columns: 1fr; }
  .soundbite-row { justify-content: center; }
}

@media (max-width: 480px) {
  .reel-grid { grid-template-columns: 1fr; }
  .search-form { flex-direction: column; }
  .search-btn { width: 100%; }
}