:root {
  --bg: #f9fafb;
  --paper: #ffffff;
  --paper-soft: #fff7ed;
  --ink: #111827;
  --muted: #6b7280;
  --line: #e5e7eb;
  --brand: #d97706;
  --brand-dark: #b45309;
  --brand-soft: #fef3c7;
  --shadow: 0 18px 45px rgba(15, 23, 42, 0.12);
  --radius: 24px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.6;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.88);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(229, 231, 235, 0.88);
}

.nav-shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  min-height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-weight: 900;
  letter-spacing: -0.02em;
}

.brand-mark {
  width: 38px;
  height: 38px;
  display: inline-grid;
  place-items: center;
  color: #ffffff;
  background: linear-gradient(135deg, #f59e0b, #b45309);
  border-radius: 14px;
  box-shadow: 0 10px 22px rgba(217, 119, 6, 0.28);
}

.brand-text {
  font-size: 20px;
}

.main-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-end;
  gap: 8px;
}

.nav-link {
  color: #374151;
  font-size: 15px;
  font-weight: 700;
  padding: 10px 14px;
  border-radius: 999px;
  transition: 0.2s ease;
}

.nav-link:hover,
.nav-link.active {
  color: #ffffff;
  background: var(--brand);
}

.hero {
  position: relative;
  height: 500px;
  min-height: 500px;
  overflow: hidden;
  background: #111827;
}

.hero-slide {
  position: absolute;
  inset: 0;
  opacity: 0;
  pointer-events: none;
  transition: opacity 1s ease;
}

.hero-slide.active {
  opacity: 1;
  pointer-events: auto;
}

.hero-slide img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transform: scale(1.02);
}

.hero-slide::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.95), rgba(0, 0, 0, 0.55), rgba(0, 0, 0, 0.08));
}

.hero-content {
  position: absolute;
  left: max(24px, calc((100% - 1180px) / 2));
  right: max(24px, calc((100% - 1180px) / 2));
  bottom: 54px;
  z-index: 2;
  max-width: 760px;
  color: #ffffff;
}

.hero-kicker {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}

.hero-kicker span {
  color: #fde68a;
  font-size: 14px;
}

.hero-kicker strong {
  color: #ffffff;
  background: var(--brand);
  padding: 4px 12px;
  border-radius: 999px;
  font-size: 14px;
}

.hero h1,
.hero h2 {
  margin: 0 0 16px;
  font-size: clamp(34px, 6vw, 60px);
  line-height: 1.05;
  font-weight: 950;
  letter-spacing: -0.045em;
}

.hero p {
  margin: 0 0 26px;
  color: #e5e7eb;
  font-size: clamp(16px, 2vw, 20px);
  max-width: 760px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 44px;
  padding: 0 22px;
  border-radius: 999px;
  font-weight: 800;
  border: 1px solid transparent;
  cursor: pointer;
  transition: 0.2s ease;
}

.btn-primary {
  color: #ffffff;
  background: var(--brand);
  box-shadow: 0 16px 30px rgba(217, 119, 6, 0.3);
}

.btn-primary:hover {
  background: var(--brand-dark);
  transform: translateY(-1px);
}

.btn-ghost {
  color: #ffffff;
  border-color: rgba(255, 255, 255, 0.38);
  background: rgba(0, 0, 0, 0.28);
  backdrop-filter: blur(8px);
}

.btn-ghost:hover {
  border-color: #ffffff;
  background: rgba(255, 255, 255, 0.12);
}

.hero-arrow {
  position: absolute;
  top: 50%;
  z-index: 3;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: 0;
  color: #ffffff;
  background: rgba(0, 0, 0, 0.48);
  cursor: pointer;
  transform: translateY(-50%);
  transition: 0.2s ease;
}

.hero-arrow:hover {
  background: rgba(0, 0, 0, 0.72);
}

.hero-prev {
  left: 18px;
}

.hero-next {
  right: 18px;
}

.hero-dots {
  position: absolute;
  z-index: 4;
  bottom: 18px;
  left: 50%;
  display: flex;
  gap: 8px;
  transform: translateX(-50%);
}

.hero-dot {
  width: 9px;
  height: 9px;
  border-radius: 999px;
  border: 0;
  background: rgba(255, 255, 255, 0.55);
  cursor: pointer;
  transition: 0.25s ease;
}

.hero-dot.active {
  width: 34px;
  background: #f59e0b;
}

.container {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
}

.page-main {
  padding: 42px 0 76px;
}

.section {
  margin-top: 48px;
}

.section:first-child {
  margin-top: 0;
}

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 22px;
}

.section-heading h2 {
  margin: 0;
  font-size: clamp(26px, 4vw, 36px);
  line-height: 1.2;
  letter-spacing: -0.03em;
}

.section-heading p {
  margin: 6px 0 0;
  color: var(--muted);
}

.eyebrow {
  margin: 0 0 4px !important;
  color: var(--brand) !important;
  font-weight: 900;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.section-more {
  flex: 0 0 auto;
  color: var(--brand);
  font-weight: 900;
}

.grid {
  display: grid;
  gap: 22px;
}

.grid-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.grid-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.video-card {
  overflow: hidden;
  background: var(--paper);
  border: 1px solid rgba(229, 231, 235, 0.9);
  border-radius: 20px;
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.06);
  transition: 0.25s ease;
}

.video-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow);
}

.video-card.is-hidden {
  display: none;
}

.poster-wrap {
  position: relative;
  display: block;
  aspect-ratio: 16 / 10;
  overflow: hidden;
  background: linear-gradient(135deg, #111827, #92400e);
}

.poster-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.35s ease;
}

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

.poster-wrap::after {
  content: "";
  position: absolute;
  inset: 0;
  opacity: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.72), rgba(0, 0, 0, 0.12));
  transition: opacity 0.25s ease;
}

.video-card:hover .poster-wrap::after {
  opacity: 1;
}

.play-badge {
  position: absolute;
  inset: 0;
  z-index: 2;
  margin: auto;
  width: 58px;
  height: 58px;
  display: grid;
  place-items: center;
  color: #ffffff;
  background: var(--brand);
  border-radius: 50%;
  opacity: 0;
  transform: scale(0.86);
  transition: 0.25s ease;
}

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

.rank-no {
  position: absolute;
  top: 12px;
  left: 12px;
  z-index: 3;
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  color: #ffffff;
  background: linear-gradient(135deg, #f59e0b, #b45309);
  border-radius: 14px;
  box-shadow: 0 10px 22px rgba(0, 0, 0, 0.22);
}

.card-body {
  padding: 16px;
}

.meta-row,
.detail-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  color: var(--muted);
  font-size: 13px;
}

.meta-row span,
.detail-meta span {
  padding: 3px 9px;
  border-radius: 999px;
  background: #f3f4f6;
}

.card-body h3 {
  margin: 10px 0 8px;
  font-size: 18px;
  line-height: 1.35;
}

.card-body p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 12px;
}

.tag-row span,
.tags a,
.tags span {
  color: #92400e;
  background: var(--brand-soft);
  border-radius: 999px;
  padding: 4px 9px;
  font-size: 12px;
  font-weight: 800;
}

.feature-panel {
  padding: 32px;
  border-radius: var(--radius);
  background: linear-gradient(135deg, #fff7ed, #fef3c7);
  box-shadow: inset 0 0 0 1px rgba(245, 158, 11, 0.18);
}

.stats-row {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin-top: 24px;
}

.stat-card,
.category-tile,
.info-panel,
.filter-panel {
  background: var(--paper);
  border: 1px solid rgba(229, 231, 235, 0.9);
  border-radius: 20px;
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.06);
}

.stat-card {
  padding: 20px;
}

.stat-card strong {
  display: block;
  color: var(--brand);
  font-size: 30px;
  line-height: 1;
}

.stat-card span {
  color: var(--muted);
  font-weight: 700;
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 16px;
}

.category-tile {
  padding: 20px;
  transition: 0.25s ease;
}

.category-tile:hover {
  color: #ffffff;
  background: linear-gradient(135deg, #f59e0b, #b45309);
  transform: translateY(-4px);
}

.category-tile strong {
  display: block;
  font-size: 18px;
}

.category-tile span {
  color: var(--muted);
  font-size: 14px;
}

.category-tile:hover span {
  color: #fffbeb;
}

.page-hero {
  padding: 48px;
  color: #ffffff;
  border-radius: 30px;
  background:
    radial-gradient(circle at 16% 22%, rgba(245, 158, 11, 0.56), transparent 28%),
    linear-gradient(135deg, #111827 0%, #451a03 58%, #92400e 100%);
  box-shadow: var(--shadow);
}

.page-hero h1 {
  max-width: 820px;
  margin: 0;
  font-size: clamp(34px, 6vw, 56px);
  line-height: 1.08;
  letter-spacing: -0.045em;
}

.page-hero p {
  max-width: 760px;
  margin: 16px 0 0;
  color: #f3f4f6;
  font-size: 18px;
}

.filter-panel {
  display: grid;
  grid-template-columns: 1.6fr repeat(3, 1fr);
  gap: 12px;
  padding: 16px;
  margin: 28px 0;
}

.filter-panel input,
.filter-panel select {
  width: 100%;
  min-height: 46px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #ffffff;
  font: inherit;
}

.result-count {
  margin: 0 0 18px;
  color: var(--muted);
  font-weight: 700;
}

.detail-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 28px;
}

.player-shell {
  overflow: hidden;
  border-radius: 28px;
  background: #030712;
  box-shadow: var(--shadow);
}

.video-frame {
  position: relative;
  aspect-ratio: 16 / 9;
  background: #030712;
}

.video-frame video {
  width: 100%;
  height: 100%;
  display: block;
  object-fit: contain;
  background: #000000;
}

.play-overlay {
  position: absolute;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 24px;
  color: #ffffff;
  background:
    linear-gradient(to top, rgba(0, 0, 0, 0.86), rgba(0, 0, 0, 0.18)),
    var(--poster, transparent);
  background-size: cover;
  background-position: center;
  text-align: center;
  cursor: pointer;
}

.play-overlay.is-hidden {
  display: none;
}

.big-play {
  width: 78px;
  height: 78px;
  margin: 0 auto 16px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--brand);
  box-shadow: 0 22px 42px rgba(217, 119, 6, 0.36);
}

.player-note {
  margin: 0;
  color: #fde68a;
  font-weight: 800;
}

.detail-content,
.side-box {
  margin-top: 22px;
  padding: 24px;
  background: var(--paper);
  border: 1px solid rgba(229, 231, 235, 0.9);
  border-radius: 22px;
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.06);
}

.detail-content h1 {
  margin: 10px 0 10px;
  font-size: clamp(30px, 5vw, 48px);
  line-height: 1.12;
  letter-spacing: -0.04em;
}

.detail-content h2,
.side-box h2,
.side-box h3 {
  margin: 0 0 12px;
}

.detail-content p {
  color: #374151;
}

.detail-cover {
  overflow: hidden;
  border-radius: 22px;
  background: linear-gradient(135deg, #111827, #92400e);
}

.detail-cover img {
  width: 100%;
  aspect-ratio: 3 / 4;
  object-fit: cover;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}

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

.rank-item {
  display: grid;
  grid-template-columns: 48px 1fr auto;
  gap: 12px;
  align-items: center;
  padding: 14px;
  border-radius: 16px;
  background: #f9fafb;
}

.rank-item b {
  display: grid;
  place-items: center;
  width: 38px;
  height: 38px;
  color: #ffffff;
  background: var(--brand);
  border-radius: 12px;
}

.rank-item strong {
  display: block;
}

.rank-item span {
  color: var(--muted);
  font-size: 13px;
}

.site-footer {
  margin-top: 72px;
  color: #d1d5db;
  background: #111827;
}

.footer-inner {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 38px 0;
  display: flex;
  justify-content: space-between;
  gap: 24px;
}

.footer-inner p {
  margin: 8px 0 0;
  color: #9ca3af;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.footer-links a {
  color: #fbbf24;
  font-weight: 800;
}

.copyright {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 0 0 26px;
  color: #9ca3af;
}

.empty-state {
  display: none;
  padding: 30px;
  text-align: center;
  color: var(--muted);
  background: #ffffff;
  border-radius: 20px;
}

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

@media (max-width: 980px) {
  .grid-4,
  .grid-3,
  .category-grid,
  .stats-row,
  .detail-layout,
  .filter-panel {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .detail-layout {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 720px) {
  .nav-shell,
  .section-heading,
  .footer-inner {
    align-items: flex-start;
    flex-direction: column;
  }

  .main-nav {
    justify-content: flex-start;
  }

  .hero {
    height: 560px;
  }

  .hero-content {
    bottom: 58px;
  }

  .hero-arrow {
    display: none;
  }

  .grid-4,
  .grid-3,
  .category-grid,
  .stats-row,
  .filter-panel {
    grid-template-columns: 1fr;
  }

  .page-hero {
    padding: 30px;
    border-radius: 24px;
  }
}