:root {
  --bg: #020617;
  --bg-soft: #0f172a;
  --bg-card: #111827;
  --bg-card-2: #1e293b;
  --border: rgba(148, 163, 184, 0.18);
  --text: #f8fafc;
  --muted: #94a3b8;
  --muted-2: #64748b;
  --cyan: #22d3ee;
  --blue: #3b82f6;
  --pink: #f472b6;
  --shadow: 0 24px 80px rgba(0, 0, 0, 0.36);
  --radius: 24px;
  --radius-card: 18px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  background:
    radial-gradient(circle at top left, rgba(34, 211, 238, 0.18), transparent 34rem),
    radial-gradient(circle at 80% 10%, rgba(59, 130, 246, 0.18), transparent 30rem),
    linear-gradient(180deg, #020617 0%, #0f172a 45%, #020617 100%);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Microsoft YaHei", sans-serif;
  -webkit-font-smoothing: antialiased;
}

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

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

button,
input,
select {
  font: inherit;
}

button {
  cursor: pointer;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 1px solid var(--border);
  background: rgba(2, 6, 23, 0.82);
  backdrop-filter: blur(18px);
}

.header-inner,
.footer-inner,
.page-wrap {
  width: min(1240px, calc(100% - 32px));
  margin: 0 auto;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
}

.site-logo,
.footer-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.site-logo {
  font-size: 22px;
}

.logo-mark {
  display: inline-grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--cyan), var(--blue));
  color: white;
  box-shadow: 0 10px 26px rgba(34, 211, 238, 0.24);
  font-size: 14px;
}

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

.nav-link,
.mobile-nav-link {
  color: var(--muted);
  border-radius: 999px;
  transition: color 180ms ease, background 180ms ease, transform 180ms ease;
}

.nav-link {
  padding: 10px 16px;
}

.nav-link:hover,
.nav-link.active,
.mobile-nav-link:hover,
.mobile-nav-link.active {
  color: white;
  background: rgba(34, 211, 238, 0.12);
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: rgba(15, 23, 42, 0.88);
  color: white;
}

.menu-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 4px auto;
  border-radius: 999px;
  background: white;
}

.mobile-nav {
  display: none;
  width: min(1240px, calc(100% - 32px));
  margin: 0 auto 14px;
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: rgba(15, 23, 42, 0.96);
}

.mobile-nav.open {
  display: grid;
  gap: 8px;
}

.mobile-nav-link {
  padding: 12px 14px;
}

.page-wrap {
  padding: 40px 0 64px;
}

.hero-shell {
  display: grid;
  gap: 18px;
  padding-top: 24px;
}

.hero-slider {
  position: relative;
  min-height: 560px;
  overflow: hidden;
  border: 1px solid rgba(148, 163, 184, 0.14);
  border-radius: 30px;
  box-shadow: var(--shadow);
  background: #0f172a;
}

.hero-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  pointer-events: none;
  transition: opacity 600ms ease, transform 600ms ease;
  transform: scale(1.02);
}

.hero-slide.active {
  opacity: 1;
  pointer-events: auto;
  transform: scale(1);
}

.hero-image {
  width: 100%;
  height: 100%;
  min-height: 560px;
  object-fit: cover;
  transform: scale(1.02);
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(2, 6, 23, 0.95) 0%, rgba(2, 6, 23, 0.62) 44%, rgba(2, 6, 23, 0.16) 100%),
    linear-gradient(0deg, rgba(2, 6, 23, 0.95) 0%, transparent 48%);
}

.hero-content {
  position: absolute;
  left: clamp(24px, 6vw, 72px);
  right: clamp(24px, 40vw, 52%);
  bottom: clamp(42px, 8vw, 88px);
  z-index: 2;
}

.hero-kicker,
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--cyan);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.hero-kicker::before,
.eyebrow::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: var(--cyan);
  box-shadow: 0 0 18px var(--cyan);
}

.hero-content h1 {
  margin: 18px 0 18px;
  font-size: clamp(36px, 6vw, 68px);
  line-height: 1.04;
  letter-spacing: -0.04em;
}

.hero-content p {
  max-width: 760px;
  margin: 0 0 22px;
  color: #dbeafe;
  font-size: clamp(16px, 2vw, 20px);
  line-height: 1.8;
}

.hero-meta,
.card-meta,
.detail-meta,
.rank-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  color: var(--muted);
}

.hero-meta span,
.card-meta span,
.detail-meta span {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  padding: 4px 10px;
  border: 1px solid rgba(148, 163, 184, 0.16);
  border-radius: 999px;
  background: rgba(15, 23, 42, 0.52);
}

.hero-tags,
.tag-row,
.detail-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.hero-tags {
  margin: 20px 0 26px;
}

.hero-tags span,
.tag-row span,
.detail-tags span {
  border: 1px solid rgba(34, 211, 238, 0.18);
  border-radius: 999px;
  background: rgba(34, 211, 238, 0.1);
  color: #a5f3fc;
}

.hero-tags span,
.detail-tags span {
  padding: 7px 12px;
  font-size: 14px;
}

.tag-row span {
  padding: 4px 9px;
  font-size: 12px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 24px;
  border-radius: 999px;
  font-weight: 800;
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
}

.btn:hover {
  transform: translateY(-2px) scale(1.01);
}

.btn-primary {
  background: linear-gradient(135deg, var(--cyan), var(--blue));
  color: white;
  box-shadow: 0 14px 32px rgba(34, 211, 238, 0.22);
}

.btn-ghost {
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(15, 23, 42, 0.58);
  color: white;
}

.hero-arrow {
  position: absolute;
  top: 50%;
  z-index: 3;
  width: 48px;
  height: 48px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  border-radius: 999px;
  background: rgba(2, 6, 23, 0.56);
  color: white;
  font-size: 32px;
  backdrop-filter: blur(14px);
  transform: translateY(-50%);
}

.hero-prev {
  left: 20px;
}

.hero-next {
  right: 20px;
}

.hero-dots {
  position: absolute;
  left: 50%;
  bottom: 22px;
  z-index: 3;
  display: flex;
  gap: 8px;
  transform: translateX(-50%);
}

.hero-dot {
  width: 10px;
  height: 10px;
  border: 0;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.42);
  transition: width 240ms ease, background 240ms ease;
}

.hero-dot.active {
  width: 34px;
  background: var(--cyan);
}

.hero-search,
.filter-bar {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 12px;
  padding: 14px;
  border: 1px solid var(--border);
  border-radius: 22px;
  background: rgba(15, 23, 42, 0.82);
  box-shadow: 0 18px 56px rgba(0, 0, 0, 0.24);
}

.hero-search input,
.filter-bar input,
.filter-bar select {
  min-height: 48px;
  width: 100%;
  border: 1px solid rgba(148, 163, 184, 0.16);
  border-radius: 16px;
  outline: none;
  background: rgba(2, 6, 23, 0.7);
  color: white;
  padding: 0 16px;
}

.hero-search button,
.filter-bar button {
  min-height: 48px;
  border: 0;
  border-radius: 16px;
  background: linear-gradient(135deg, var(--cyan), var(--blue));
  color: white;
  padding: 0 22px;
  font-weight: 800;
}

.section {
  margin-top: 56px;
}

.section-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 22px;
}

.section-heading h1,
.section-heading h2 {
  margin: 8px 0 8px;
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.1;
  letter-spacing: -0.03em;
}

.section-heading p {
  max-width: 760px;
  margin: 0;
  color: var(--muted);
  line-height: 1.8;
}

.section-more {
  flex: 0 0 auto;
  color: var(--cyan);
  font-weight: 800;
}

.video-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

.video-card {
  overflow: hidden;
  border: 1px solid rgba(148, 163, 184, 0.12);
  border-radius: var(--radius-card);
  background: rgba(15, 23, 42, 0.84);
  box-shadow: 0 16px 50px rgba(0, 0, 0, 0.18);
  transition: transform 220ms ease, box-shadow 220ms ease, border-color 220ms ease;
}

.video-card:hover {
  border-color: rgba(34, 211, 238, 0.34);
  box-shadow: 0 22px 66px rgba(0, 0, 0, 0.34);
  transform: translateY(-4px);
}

.card-cover {
  position: relative;
  display: block;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: #0f172a;
}

.card-cover img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 480ms ease;
}

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

.cover-gradient {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 36%, rgba(2, 6, 23, 0.82) 100%);
  opacity: 0.9;
}

.play-badge {
  position: absolute;
  left: 50%;
  top: 50%;
  display: grid;
  place-items: center;
  width: 54px;
  height: 54px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--cyan), var(--blue));
  color: white;
  opacity: 0;
  box-shadow: 0 14px 28px rgba(34, 211, 238, 0.26);
  transform: translate(-50%, -50%) scale(0.86);
  transition: opacity 220ms ease, transform 220ms ease;
}

.video-card:hover .play-badge {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}

.type-badge {
  position: absolute;
  right: 12px;
  bottom: 12px;
  padding: 6px 10px;
  border-radius: 10px;
  background: rgba(2, 6, 23, 0.72);
  color: #e0f2fe;
  font-size: 12px;
  backdrop-filter: blur(10px);
}

.card-body {
  padding: 16px;
}

.card-title {
  margin: 0 0 9px;
  color: white;
  font-size: 17px;
  line-height: 1.45;
}

.card-title a:hover {
  color: var(--cyan);
}

.card-desc {
  display: -webkit-box;
  min-height: 44px;
  margin: 0 0 14px;
  overflow: hidden;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
}

.card-meta {
  gap: 6px;
  margin-bottom: 12px;
  font-size: 12px;
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.category-card {
  overflow: hidden;
  border: 1px solid rgba(148, 163, 184, 0.12);
  border-radius: 22px;
  background: rgba(15, 23, 42, 0.86);
  transition: transform 220ms ease, border-color 220ms ease;
}

.category-card:hover {
  border-color: rgba(34, 211, 238, 0.32);
  transform: translateY(-3px);
}

.category-preview {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  height: 116px;
  background: #0f172a;
}

.category-preview img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

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

.category-card-body span {
  color: var(--cyan);
  font-size: 13px;
  font-weight: 800;
}

.category-card-body h3 {
  margin: 8px 0 8px;
  font-size: 22px;
}

.category-card-body p {
  margin: 0;
  color: var(--muted);
  line-height: 1.7;
}

.rank-panel {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(300px, 0.85fr);
  gap: 20px;
}

.rank-list,
.info-panel,
.detail-card,
.player-card {
  border: 1px solid rgba(148, 163, 184, 0.12);
  border-radius: 24px;
  background: rgba(15, 23, 42, 0.86);
  box-shadow: 0 18px 58px rgba(0, 0, 0, 0.2);
}

.rank-list {
  padding: 12px;
}

.rank-row {
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr) auto 66px;
  align-items: center;
  gap: 14px;
  min-height: 58px;
  padding: 10px 12px;
  border-radius: 16px;
  color: var(--muted);
  transition: background 180ms ease, color 180ms ease;
}

.rank-row:hover {
  background: rgba(34, 211, 238, 0.1);
  color: white;
}

.rank-number {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  border-radius: 12px;
  background: rgba(34, 211, 238, 0.12);
  color: var(--cyan);
  font-weight: 900;
}

.rank-title {
  overflow: hidden;
  color: white;
  font-weight: 800;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.rank-heat {
  justify-self: end;
  color: #fde68a;
  font-weight: 900;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
  color: var(--muted);
  font-size: 14px;
}

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

.detail-hero {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(320px, 0.85fr);
  gap: 24px;
  align-items: start;
}

.player-card {
  overflow: hidden;
}

.video-player {
  position: relative;
  aspect-ratio: 16 / 9;
  background: #000;
}

.video-player video {
  width: 100%;
  height: 100%;
  background: #000;
  object-fit: contain;
}

.player-overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  background:
    radial-gradient(circle, rgba(34, 211, 238, 0.18), transparent 30%),
    linear-gradient(180deg, rgba(2, 6, 23, 0.15), rgba(2, 6, 23, 0.72));
  pointer-events: none;
}

.play-button {
  display: grid;
  place-items: center;
  width: 82px;
  height: 82px;
  border: 0;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--cyan), var(--blue));
  color: white;
  font-size: 30px;
  box-shadow: 0 18px 42px rgba(34, 211, 238, 0.32);
  pointer-events: auto;
}

.player-status {
  padding: 14px 18px;
  border-top: 1px solid var(--border);
  color: var(--muted);
  font-size: 14px;
}

.detail-card {
  padding: clamp(22px, 4vw, 34px);
}

.detail-card h1 {
  margin: 12px 0 16px;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.12;
  letter-spacing: -0.03em;
}

.detail-card .summary {
  margin: 20px 0;
  color: #dbeafe;
  font-size: 17px;
  line-height: 1.9;
}

.detail-tags {
  margin-top: 18px;
}

.content-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 320px;
  gap: 24px;
  margin-top: 28px;
}

.content-article,
.side-panel {
  border: 1px solid rgba(148, 163, 184, 0.12);
  border-radius: 24px;
  background: rgba(15, 23, 42, 0.86);
  padding: clamp(22px, 4vw, 32px);
}

.content-article h2,
.side-panel h2,
.side-panel h3,
.info-panel h2 {
  margin: 0 0 16px;
  font-size: 24px;
}

.content-article p {
  color: #cbd5e1;
  font-size: 16px;
  line-height: 1.95;
}

.info-panel {
  padding: 22px;
}

.info-list {
  display: grid;
  gap: 12px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.info-list li {
  display: flex;
  justify-content: space-between;
  gap: 16px;
  padding-bottom: 12px;
  border-bottom: 1px solid rgba(148, 163, 184, 0.12);
  color: var(--muted);
}

.info-list strong {
  color: white;
}

.related-list {
  display: grid;
  gap: 12px;
}

.related-item {
  display: grid;
  grid-template-columns: 74px 1fr;
  gap: 12px;
  align-items: center;
  padding: 8px;
  border-radius: 14px;
  background: rgba(2, 6, 23, 0.34);
}

.related-item:hover {
  background: rgba(34, 211, 238, 0.1);
}

.related-item img {
  width: 74px;
  height: 52px;
  border-radius: 10px;
  object-fit: cover;
}

.related-item strong {
  display: block;
  margin-bottom: 4px;
  color: white;
  font-size: 14px;
}

.related-item span {
  color: var(--muted);
  font-size: 12px;
}

.filter-bar {
  grid-template-columns: minmax(220px, 1fr) 160px 160px auto;
  margin-bottom: 22px;
}

.empty-state {
  display: none;
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: 18px;
  color: var(--muted);
  text-align: center;
}

.empty-state.show {
  display: block;
}

.site-footer {
  border-top: 1px solid var(--border);
  background: rgba(2, 6, 23, 0.84);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 34px 0;
  color: var(--muted);
}

.footer-logo {
  margin-bottom: 12px;
  color: white;
  font-size: 20px;
}

.footer-inner p {
  max-width: 520px;
  margin: 0;
  line-height: 1.8;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: flex-start;
  justify-content: flex-end;
}

.footer-links a {
  padding: 8px 12px;
  border-radius: 999px;
  background: rgba(148, 163, 184, 0.08);
}

.footer-links a:hover {
  color: white;
  background: rgba(34, 211, 238, 0.14);
}

@media (max-width: 1024px) {
  .video-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .category-grid,
  .rank-panel,
  .detail-hero,
  .content-layout {
    grid-template-columns: 1fr;
  }

  .side-panel {
    order: -1;
  }
}

@media (max-width: 760px) {
  .desktop-nav {
    display: none;
  }

  .menu-toggle {
    display: block;
  }

  .header-inner {
    min-height: 64px;
  }

  .page-wrap {
    padding-top: 26px;
  }

  .hero-slider,
  .hero-image {
    min-height: 520px;
  }

  .hero-content {
    left: 20px;
    right: 20px;
    bottom: 64px;
  }

  .hero-arrow {
    display: none;
  }

  .hero-search,
  .filter-bar {
    grid-template-columns: 1fr;
  }

  .section-heading,
  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
  }

  .video-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }

  .category-grid {
    grid-template-columns: 1fr;
  }

  .rank-row {
    grid-template-columns: 48px minmax(0, 1fr) 56px;
  }

  .rank-meta {
    display: none;
  }

  .footer-links {
    justify-content: flex-start;
  }
}

@media (max-width: 520px) {
  .header-inner,
  .footer-inner,
  .page-wrap,
  .mobile-nav {
    width: min(100% - 24px, 1240px);
  }

  .site-logo {
    font-size: 18px;
  }

  .hero-slider,
  .hero-image {
    min-height: 500px;
    border-radius: 22px;
  }

  .hero-content h1 {
    font-size: 32px;
  }

  .hero-meta span,
  .detail-meta span {
    min-height: 26px;
    font-size: 12px;
  }

  .hero-actions .btn {
    width: 100%;
  }

  .video-grid {
    grid-template-columns: 1fr;
  }

  .content-article,
  .detail-card,
  .side-panel {
    padding: 20px;
  }
}