:root {
  --bg-primary: #090a0f;
  --bg-secondary: #12141d;
  --bg-card: #161925;
  --bg-card-hover: #1d2130;
  --bg-elevated: #222638;
  --border-subtle: rgba(212, 175, 55, 0.15);
  --border-active: rgba(212, 175, 55, 0.5);
  --gold-main: #d4af37;
  --gold-light: #f9f1d0;
  --gold-dark: #997819;
  --gold-glow: rgba(212, 175, 55, 0.35);
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --text-dim: #64748b;
  --accent-red: #ef4444;
  --accent-green: #10b981;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "PingFang SC", "Microsoft YaHei", sans-serif;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --transition-fast: 0.2s ease;
  --transition-smooth: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}
body {
  background: var(--bg-primary);
  color: var(--text-main);
  font-family: var(--font-sans);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
a {
  color: inherit;
  text-decoration: none;
}
button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  outline: none;
  background: none;
}
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}
.gold-gradient-text {
  background: linear-gradient(135deg, #fff2c6 0%, #d4af37 50%, #aa8014 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}
.gold-border {
  border: 1px solid var(--border-subtle);
}
.btn-gold {
  background: linear-gradient(135deg, #e8c858 0%, #d4af37 60%, #b88f1d 100%);
  color: #0c0d12;
  font-weight: 600;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: var(--transition-fast);
  box-shadow: 0 4px 18px rgba(212, 175, 55, 0.25);
}
.btn-gold:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 24px rgba(212, 175, 55, 0.4);
}
.btn-outline {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  font-weight: 500;
  padding: 11px 22px;
  border-radius: var(--radius-sm);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  transition: var(--transition-fast);
  backdrop-filter: blur(8px);
}
.btn-outline:hover {
  border-color: var(--gold-main);
  color: var(--gold-light);
  background: rgba(212, 175, 55, 0.08);
}

/* Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(9, 10, 15, 0.88);
  backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}
.logo-group {
  display: flex;
  align-items: center;
  gap: 12px;
}
.logo-icon {
  width: 40px;
  height: 40px;
  border-radius: 8px;
  background: linear-gradient(135deg, #1e2230 0%, #0e1017 100%);
  border: 1px solid var(--border-subtle);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--gold-main);
  font-size: 20px;
}
.logo-title {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: 0.5px;
}
.logo-sub {
  font-size: 11px;
  color: var(--gold-main);
  letter-spacing: 1px;
  text-transform: uppercase;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
}
.nav-link {
  font-size: 14px;
  color: var(--text-muted);
  transition: var(--transition-fast);
  font-weight: 500;
}
.nav-link:hover, .nav-link.active {
  color: var(--gold-light);
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 14px;
}
.cart-btn {
  position: relative;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: 20px;
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  transition: var(--transition-fast);
}
.cart-btn:hover {
  border-color: var(--gold-main);
  background: var(--bg-elevated);
}
.cart-count {
  background: var(--gold-main);
  color: #000;
  font-size: 12px;
  font-weight: 700;
  padding: 1px 7px;
  border-radius: 10px;
}

/* Hero Section */
.hero {
  position: relative;
  padding: 140px 0 90px;
  background: radial-gradient(circle at 65% 30%, rgba(212, 175, 55, 0.09) 0%, transparent 50%), radial-gradient(circle at 20% 70%, rgba(30, 41, 59, 0.45) 0%, transparent 60%);
  overflow: hidden;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 48px;
  align-items: center;
}
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(212, 175, 55, 0.1);
  border: 1px solid var(--border-subtle);
  border-radius: 20px;
  font-size: 12px;
  color: var(--gold-main);
  margin-bottom: 20px;
}
.hero-title {
  font-size: 46px;
  line-height: 1.22;
  font-weight: 800;
  margin-bottom: 20px;
  letter-spacing: -0.5px;
}
.hero-desc {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 30px;
  max-width: 560px;
}
.hero-specs-row {
  display: flex;
  gap: 24px;
  margin-bottom: 34px;
  padding: 16px 20px;
  background: rgba(22, 25, 37, 0.65);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-md);
}
.spec-item {
  display: flex;
  flex-direction: column;
}
.spec-val {
  font-size: 15px;
  font-weight: 700;
  color: var(--gold-light);
}
.spec-label {
  font-size: 12px;
  color: var(--text-dim);
}
.hero-btns {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* Hero Visual Card Fan */
.hero-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 460px;
  perspective: 1200px;
}
.hero-card-fan {
  position: relative;
  width: 210px;
  height: 315px;
  cursor: pointer;
}
.fan-card {
  position: absolute;
  width: 100%;
  height: 100%;
  border-radius: 12px;
  background-size: cover;
  background-position: center;
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.75), 0 0 0 1px rgba(212, 175, 55, 0.25);
  transition: transform 0.5s cubic-bezier(0.2, 0.8, 0.2, 1), box-shadow 0.3s ease;
  transform-origin: bottom center;
}
.fan-card:nth-child(1) {
  transform: rotate(-16deg) translate(-36px, 12px);
  z-index: 1;
}
.fan-card:nth-child(2) {
  transform: rotate(-8deg) translate(-18px, 6px);
  z-index: 2;
}
.fan-card:nth-child(3) {
  transform: rotate(0deg) translate(0px, 0px);
  z-index: 3;
  box-shadow: 0 20px 48px rgba(0, 0, 0, 0.85), 0 0 30px rgba(212, 175, 55, 0.25);
}
.fan-card:nth-child(4) {
  transform: rotate(8deg) translate(18px, 6px);
  z-index: 4;
}
.fan-card:nth-child(5) {
  transform: rotate(16deg) translate(36px, 12px);
  z-index: 5;
}
.hero-card-fan:hover .fan-card:nth-child(1) {
  transform: rotate(-32deg) translate(-80px, 30px);
}
.hero-card-fan:hover .fan-card:nth-child(2) {
  transform: rotate(-16deg) translate(-40px, 15px);
}
.hero-card-fan:hover .fan-card:nth-child(3) {
  transform: rotate(0deg) translate(0px, -15px) scale(1.05);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.9), 0 0 40px rgba(212, 175, 55, 0.4);
}
.hero-card-fan:hover .fan-card:nth-child(4) {
  transform: rotate(16deg) translate(40px, 15px);
}
.hero-card-fan:hover .fan-card:nth-child(5) {
  transform: rotate(32deg) translate(80px, 30px);
}
.fan-tip {
  position: absolute;
  bottom: -40px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 12px;
  color: var(--text-dim);
  display: flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}

/* Section Common */
.section {
  padding: 80px 0;
  position: relative;
}
.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 48px;
}
.section-tag {
  font-size: 12px;
  font-weight: 600;
  text-transform: uppercase;
  color: var(--gold-main);
  letter-spacing: 1.5px;
  margin-bottom: 10px;
  display: block;
}
.section-title {
  font-size: 32px;
  font-weight: 700;
  margin-bottom: 14px;
}
.section-desc {
  font-size: 15px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Video Showcase */
.video-showcase-container {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
}
.video-tabs {
  display: flex;
  background: var(--bg-secondary);
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
  overflow-x: auto;
}
.video-tab {
  flex: 1;
  padding: 16px 20px;
  text-align: left;
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-muted);
  transition: var(--transition-fast);
  border-bottom: 2px solid transparent;
  white-space: nowrap;
}
.video-tab:hover {
  color: var(--text-main);
  background: rgba(255, 255, 255, 0.02);
}
.video-tab.active {
  color: var(--gold-light);
  background: rgba(212, 175, 55, 0.08);
  border-bottom-color: var(--gold-main);
}
.video-tab-idx {
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--bg-elevated);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 11px;
  font-weight: 700;
  color: var(--gold-main);
}
.video-player-wrap {
  position: relative;
  width: 100%;
  background: #000;
  aspect-ratio: 16 / 9;
  max-height: 580px;
}
.video-player-wrap video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.video-player-overlay {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  padding: 24px;
  background: linear-gradient(to top, rgba(0,0,0,0.88) 0%, transparent 100%);
  display: flex;
  align-items: center;
  justify-content: space-between;
  pointer-events: none;
}
.video-overlay-info {
  pointer-events: auto;
}
.video-overlay-title {
  font-size: 18px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 4px;
}
.video-overlay-desc {
  font-size: 13px;
  color: var(--text-muted);
}
.video-overlay-controls {
  display: flex;
  align-items: center;
  gap: 12px;
  pointer-events: auto;
}
.v-ctrl-btn {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(8px);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-fast);
}
.v-ctrl-btn:hover {
  background: var(--gold-main);
  color: #000;
  transform: scale(1.08);
}

/* Interactive 3D Card Fan Simulator Section */
.fan-simulator-box {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  position: relative;
  overflow: hidden;
}
.sim-stage {
  height: 380px;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  perspective: 1000px;
  margin-bottom: 30px;
}
.sim-fan-container {
  position: relative;
  width: 140px;
  height: 210px;
  transform-origin: bottom center;
}
.sim-card-blade {
  position: absolute;
  width: 100%;
  height: 100%;
  border-radius: 8px;
  background: #11131a;
  border: 1px solid rgba(212, 175, 55, 0.35);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.6);
  transform-origin: bottom center;
  transition: transform 0.2s cubic-bezier(0.1, 0.8, 0.2, 1);
  background-size: cover;
  background-position: center;
}
.sim-controls {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 24px;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}
.control-group label {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  color: var(--text-muted);
  margin-bottom: 10px;
}
.control-group input[type=range] {
  width: 100%;
  accent-color: var(--gold-main);
}

/* Catalog */
.catalog-nav-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
  margin-bottom: 36px;
  padding-bottom: 18px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}
.filter-chips {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}
.chip {
  padding: 8px 18px;
  border-radius: 20px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.05);
  transition: var(--transition-fast);
}
.chip:hover {
  color: var(--text-main);
  border-color: rgba(212, 175, 55, 0.3);
}
.chip.active {
  background: var(--gold-main);
  color: #000;
  font-weight: 700;
  border-color: var(--gold-main);
  box-shadow: 0 2px 10px rgba(212, 175, 55, 0.3);
}
.sort-select {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  color: var(--text-main);
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  outline: none;
  cursor: pointer;
}
.products-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 28px;
}
.product-card {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: var(--transition-smooth);
  display: flex;
  flex-direction: column;
  position: relative;
}
.product-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-active);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.6), 0 0 20px rgba(212, 175, 55, 0.15);
}
.card-img-wrap {
  position: relative;
  aspect-ratio: 4 / 5;
  background: #0f111a;
  overflow: hidden;
}
.card-img-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}
.product-card:hover .card-img-wrap img {
  transform: scale(1.06);
}
.badge-tag {
  position: absolute;
  top: 14px;
  left: 14px;
  padding: 4px 10px;
  font-size: 11px;
  font-weight: 700;
  border-radius: 4px;
  letter-spacing: 0.5px;
  z-index: 2;
}
.badge-gold {
  background: linear-gradient(135deg, #e8c858 0%, #d4af37 100%);
  color: #0c0d12;
}
.badge-dark {
  background: rgba(0, 0, 0, 0.7);
  color: #fff;
  border: 1px solid rgba(255, 255, 255, 0.2);
  backdrop-filter: blur(4px);
}
.video-play-badge {
  position: absolute;
  bottom: 14px;
  right: 14px;
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(9, 10, 15, 0.85);
  border: 1px solid var(--border-subtle);
  color: var(--gold-main);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-fast);
  z-index: 2;
}
.video-play-badge:hover {
  transform: scale(1.15);
  background: var(--gold-main);
  color: #000;
}
.card-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.card-title {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 4px;
}
.card-en {
  font-size: 11px;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: 12px;
}
.card-specs {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}
.spec-pill {
  font-size: 11px;
  padding: 3px 8px;
  border-radius: 4px;
  background: var(--bg-elevated);
  color: var(--text-muted);
  border: 1px solid rgba(255, 255, 255, 0.05);
}
.card-footer {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 14px;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
}
.price-wrap {
  display: flex;
  align-items: baseline;
  gap: 6px;
}
.price-currency {
  font-size: 13px;
  color: var(--gold-main);
  font-weight: 700;
}
.price-val {
  font-size: 22px;
  font-weight: 800;
  color: var(--gold-light);
}
.price-origin {
  font-size: 12px;
  color: var(--text-dim);
  text-decoration: line-through;
}
.card-actions {
  display: flex;
  gap: 8px;
}
.btn-add-cart {
  width: 38px;
  height: 38px;
  border-radius: 8px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-subtle);
  color: var(--gold-main);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: var(--transition-fast);
}
.btn-add-cart:hover {
  background: var(--gold-main);
  color: #000;
  transform: scale(1.05);
}

/* Academy & Tutorial Cards */
.academy-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 28px;
}
.tutorial-card {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.06);
  border-radius: var(--radius-md);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: var(--transition-smooth);
}
.tutorial-card:hover {
  transform: translateY(-6px);
  border-color: var(--border-active);
  box-shadow: 0 16px 36px rgba(0, 0, 0, 0.6), 0 0 20px rgba(212, 175, 55, 0.15);
}
.tut-thumb-wrap {
  position: relative;
  aspect-ratio: 16 / 9;
  background: #0f111a;
  overflow: hidden;
  cursor: pointer;
}
.tut-thumb-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}
.tutorial-card:hover .tut-thumb-wrap img {
  transform: scale(1.08);
}
.tut-diff-badge {
  position: absolute;
  top: 12px;
  left: 12px;
  padding: 4px 10px;
  font-size: 11px;
  font-weight: 700;
  border-radius: 4px;
  background: rgba(0, 0, 0, 0.75);
  color: var(--gold-light);
  border: 1px solid var(--border-subtle);
  backdrop-filter: blur(4px);
  z-index: 2;
}
.tut-duration-pill {
  position: absolute;
  bottom: 12px;
  right: 12px;
  padding: 3px 8px;
  font-size: 11px;
  font-weight: 600;
  border-radius: 4px;
  background: rgba(0, 0, 0, 0.8);
  color: #fff;
  backdrop-filter: blur(4px);
  z-index: 2;
}
.tut-play-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.3);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.3s ease;
  z-index: 1;
}
.tut-thumb-wrap:hover .tut-play-overlay {
  background: rgba(0, 0, 0, 0.1);
}
.tut-play-circle {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(212, 175, 55, 0.9);
  color: #000;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  padding-left: 3px;
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5);
  transition: transform 0.3s ease;
}
.tut-thumb-wrap:hover .tut-play-circle {
  transform: scale(1.15);
  background: #fff;
}
.tut-body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.tut-title {
  font-size: 16px;
  font-weight: 700;
  margin-bottom: 4px;
  cursor: pointer;
  transition: color 0.2s;
}
.tut-title:hover {
  color: var(--gold-light);
}
.tut-en {
  font-size: 11px;
  color: var(--text-dim);
  text-transform: uppercase;
  margin-bottom: 10px;
}
.tut-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 16px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.tut-deck-recommend {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  background: rgba(255, 255, 255, 0.03);
  border: 1px dashed var(--border-subtle);
  border-radius: 6px;
  margin-bottom: 16px;
  cursor: pointer;
  transition: var(--transition-fast);
}
.tut-deck-recommend:hover {
  background: rgba(212, 175, 55, 0.08);
  border-color: var(--gold-main);
}
.rec-label {
  font-size: 11px;
  color: var(--gold-main);
  font-weight: 700;
}
.rec-name {
  font-size: 12px;
  color: var(--text-main);
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.rec-price {
  font-size: 13px;
  font-weight: 800;
  color: var(--gold-light);
}
.tut-footer {
  margin-top: auto;
}

/* Tutorial Modal Layout & Speed Controls */
.tut-modal-layout {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 28px;
  padding: 28px;
}
.tut-modal-video-wrap {
  aspect-ratio: 16 / 9;
  background: #000;
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6);
  margin-bottom: 14px;
}
.tut-modal-video-wrap video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.tut-speed-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(255, 255, 255, 0.04);
  padding: 8px 12px;
  border-radius: 6px;
  border: 1px solid rgba(255, 255, 255, 0.06);
}
.tut-speed-btn {
  padding: 4px 12px;
  font-size: 12px;
  font-weight: 600;
  color: var(--text-muted);
  border-radius: 4px;
  background: transparent;
  border: 1px solid transparent;
  transition: var(--transition-fast);
}
.tut-speed-btn:hover {
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
}
.tut-speed-btn.active {
  background: var(--gold-main);
  color: #000;
  font-weight: 700;
}
.tut-steps-box {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 20px;
}
.tut-step-item {
  display: flex;
  gap: 10px;
  align-items: flex-start;
  background: rgba(255, 255, 255, 0.02);
  border: 1px solid rgba(255, 255, 255, 0.04);
  border-radius: 6px;
  padding: 8px 12px;
}
.tut-step-num {
  font-size: 11px;
  font-weight: 800;
  color: var(--gold-main);
  background: rgba(212, 175, 55, 0.1);
  border-radius: 4px;
  padding: 2px 6px;
}
.tut-step-text {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.5;
}
.tut-deck-purchase-card {
  display: flex;
  align-items: center;
  gap: 14px;
  background: rgba(212, 175, 55, 0.06);
  border: 1px solid var(--border-active);
  border-radius: 8px;
  padding: 12px;
}
.tut-deck-img {
  width: 58px;
  height: 74px;
  object-fit: cover;
  border-radius: 4px;
}

/* Pillars 4 */
.pillars-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}
.pillar-card {
  background: var(--bg-card);
  border: 1px solid rgba(255, 255, 255, 0.06);
  padding: 30px 24px;
  border-radius: var(--radius-md);
  transition: var(--transition-fast);
}
.pillar-card:hover {
  border-color: var(--border-active);
  transform: translateY(-4px);
}
.pillar-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: rgba(212, 175, 55, 0.1);
  border: 1px solid var(--border-subtle);
  color: var(--gold-main);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  font-size: 22px;
}
.pillar-title {
  font-size: 17px;
  font-weight: 700;
  margin-bottom: 8px;
}
.pillar-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.6;
}

/* Modals & Cart Drawer */
.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.85);
  backdrop-filter: blur(10px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s ease;
}
.modal-backdrop.open {
  opacity: 1;
  pointer-events: auto;
}
.modal-box {
  background: var(--bg-card);
  border: 1px solid var(--border-active);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 800px;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  box-shadow: 0 24px 64px rgba(0, 0, 0, 0.8), 0 0 40px rgba(212, 175, 55, 0.2);
}
.modal-close-btn {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
  transition: var(--transition-fast);
}
.modal-close-btn:hover {
  background: var(--gold-main);
  color: #000;
}

.modal-product-layout {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 32px;
  padding: 32px;
}
.modal-product-btns {
  display: flex;
  gap: 16px;
}
.modal-checkout-body {
  padding: 32px;
}

/* Customization Card Banner Base */
.custom-card-banner {
  background: linear-gradient(135deg, #1c1f2e 0%, #11131c 100%);
  border: 1px solid var(--border-active);
  border-radius: var(--radius-lg);
  padding: 44px;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 40px;
  align-items: center;
}
.custom-banner-btns {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}
.custom-banner-badge-box {
  background: rgba(0, 0, 0, 0.35);
  padding: 24px;
  border-radius: 12px;
  border: 1px solid rgba(255, 255, 255, 0.05);
  text-align: center;
}

/* Cart Drawer */
.cart-drawer {
  position: fixed;
  top: 0;
  right: -460px;
  width: 440px;
  max-width: 100vw;
  height: 100vh;
  background: var(--bg-secondary);
  border-left: 1px solid var(--border-subtle);
  z-index: 1100;
  display: flex;
  flex-direction: column;
  transition: right 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: -10px 0 40px rgba(0, 0, 0, 0.8);
}
.cart-drawer.open {
  right: 0;
}
.cart-header {
  padding: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.cart-items-list {
  flex: 1;
  overflow-y: auto;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.cart-item {
  display: flex;
  gap: 16px;
  background: var(--bg-card);
  padding: 12px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.05);
  align-items: center;
}
.cart-item-img {
  width: 64px;
  height: 84px;
  object-fit: cover;
  border-radius: 4px;
}
.cart-item-info {
  flex: 1;
}
.cart-item-title {
  font-size: 14px;
  font-weight: 700;
  margin-bottom: 4px;
}
.cart-item-price {
  font-size: 14px;
  color: var(--gold-light);
  font-weight: 700;
}
.cart-qty-ctrl {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 6px;
}
.qty-btn {
  width: 24px;
  height: 24px;
  border-radius: 4px;
  background: var(--bg-elevated);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
}
.cart-footer {
  padding: 24px;
  background: var(--bg-card);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}
.free-ship-bar {
  margin-bottom: 16px;
}
.free-ship-text {
  font-size: 12px;
  color: var(--gold-main);
  margin-bottom: 6px;
  display: flex;
  justify-content: space-between;
}
.progress-track {
  height: 6px;
  background: var(--bg-elevated);
  border-radius: 3px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  background: var(--gold-main);
  transition: width 0.3s ease;
}
.cart-subtotal-row {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  margin-bottom: 16px;
}
.subtotal-val {
  font-size: 24px;
  font-weight: 800;
  color: var(--gold-light);
}

/* Toast */
.toast-box {
  position: fixed;
  bottom: 28px;
  right: 28px;
  background: var(--bg-elevated);
  border: 1px solid var(--border-active);
  color: #fff;
  padding: 14px 22px;
  border-radius: var(--radius-sm);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.7);
  z-index: 2000;
  display: flex;
  align-items: center;
  gap: 12px;
  transform: translateY(100px);
  opacity: 0;
  transition: var(--transition-smooth);
  pointer-events: none;
}
.toast-box.show {
  transform: translateY(0);
  opacity: 1;
  pointer-events: auto;
}

/* Footer */
.footer {
  background: #06070a;
  border-top: 1px solid rgba(255, 255, 255, 0.06);
  padding: 60px 0 30px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: 40px;
  margin-bottom: 50px;
}
.footer-desc {
  font-size: 13px;
  color: var(--text-muted);
  line-height: 1.7;
  margin-top: 12px;
  max-width: 320px;
}
.footer-col h4 {
  font-size: 14px;
  color: var(--gold-light);
  margin-bottom: 16px;
  font-weight: 600;
}
.footer-col ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer-col a {
  font-size: 13px;
  color: var(--text-muted);
  transition: var(--transition-fast);
}
.footer-col a:hover {
  color: var(--gold-main);
}
.footer-bottom {
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.04);
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-dim);
  flex-wrap: wrap;
  gap: 12px;
}

/* Responsive */
@media (max-width: 960px) {
  .hero-grid {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 32px;
  }
  .hero-desc {
    margin-left: auto;
    margin-right: auto;
  }
  .hero-specs-row {
    justify-content: center;
  }
  .hero-btns {
    justify-content: center;
  }
  .nav-links {
    display: none;
  }
  .custom-card-banner {
    grid-template-columns: 1fr;
    gap: 24px;
    padding: 32px 24px;
    text-align: center;
  }
  .custom-banner-btns {
    justify-content: center;
  }
  .modal-product-layout {
    grid-template-columns: 1fr;
    gap: 20px;
    padding: 24px 20px;
  }
  .tut-modal-layout {
    grid-template-columns: 1fr;
    gap: 20px;
    padding: 20px;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  html, body {
    overflow-x: hidden;
    width: 100%;
  }
  .container {
    padding: 0 16px;
  }
  .header-inner {
    height: 58px;
  }
  .logo-icon {
    width: 32px;
    height: 32px;
    font-size: 16px;
  }
  .logo-title {
    font-size: 15px;
  }
  .logo-sub {
    display: none;
  }
  .btn-header-search {
    display: none;
  }
  .cart-btn {
    padding: 6px 12px;
    font-size: 13px;
  }
  .hero {
    padding: 85px 0 40px;
  }
  .hero-badge {
    font-size: 11px;
    padding: 4px 10px;
    margin-bottom: 14px;
  }
  .hero-title {
    font-size: 26px;
    line-height: 1.25;
    margin-bottom: 12px;
  }
  .hero-desc {
    font-size: 13px;
    line-height: 1.6;
    margin-bottom: 18px;
  }
  .hero-specs-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    padding: 10px 12px;
  }
  .spec-val {
    font-size: 13px;
  }
  .spec-label {
    font-size: 11px;
  }
  .hero-btns {
    flex-direction: column;
    width: 100%;
    gap: 10px;
  }
  .hero-btns .btn-gold, .hero-btns .btn-outline {
    width: 100%;
    padding: 12px 16px;
    font-size: 14px;
    justify-content: center;
  }
  .hero-visual {
    min-height: 280px;
    margin-top: 10px;
    overflow: hidden;
  }
  .hero-card-fan {
    transform: scale(0.72);
    transform-origin: center bottom;
    margin: 0 auto;
  }
  .hero-card-fan:hover .fan-card:nth-child(1) {
    transform: rotate(-20deg) translate(-40px, 15px);
  }
  .hero-card-fan:hover .fan-card:nth-child(2) {
    transform: rotate(-10deg) translate(-20px, 8px);
  }
  .hero-card-fan:hover .fan-card:nth-child(3) {
    transform: rotate(0deg) translate(0px, -8px) scale(1.03);
  }
  .hero-card-fan:hover .fan-card:nth-child(4) {
    transform: rotate(10deg) translate(20px, 8px);
  }
  .hero-card-fan:hover .fan-card:nth-child(5) {
    transform: rotate(20deg) translate(40px, 15px);
  }
  .fan-tip {
    font-size: 11px;
    bottom: -24px;
  }
  .section {
    padding: 48px 0;
  }
  .section-header {
    margin-bottom: 28px;
  }
  .section-title {
    font-size: 22px;
    margin-bottom: 10px;
  }
  .section-desc {
    font-size: 13px;
  }
  .video-showcase-container {
    border-radius: 12px;
  }
  .video-tabs {
    padding: 6px;
    gap: 6px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
  }
  .video-tab {
    flex: 0 0 auto;
    min-width: 150px;
    padding: 8px 12px;
    border-radius: 6px;
  }
  .video-tab-idx {
    width: 20px;
    height: 20px;
    font-size: 10px;
  }
  .video-player-overlay {
    padding: 10px 12px;
  }
  .video-overlay-title {
    font-size: 12px;
  }
  .video-overlay-desc {
    display: none;
  }
  .v-ctrl-btn {
    width: 34px;
    height: 34px;
    font-size: 11px;
  }
  .fan-simulator-box {
    padding: 18px 12px;
    border-radius: 12px;
  }
  .sim-stage {
    height: 220px;
    margin-bottom: 14px;
    overflow: hidden;
  }
  .sim-fan-container {
    transform: scale(0.65);
    transform-origin: center bottom;
  }
  .sim-controls {
    grid-template-columns: 1fr;
    gap: 14px;
    padding-top: 14px;
  }
  .catalog-nav-row {
    gap: 10px;
    margin-bottom: 20px;
    flex-direction: column;
    align-items: stretch;
  }
  .filter-chips {
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    scrollbar-width: none;
    flex-wrap: nowrap;
    width: 100%;
    padding-bottom: 4px;
    gap: 6px;
  }
  .chip {
    flex: 0 0 auto;
    padding: 6px 12px;
    font-size: 12px;
  }
  .sort-select {
    width: 100%;
  }
  .products-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .card-body {
    padding: 14px;
  }
  .card-title {
    font-size: 16px;
  }
  .card-specs {
    gap: 4px;
    margin-bottom: 12px;
  }
  .spec-pill {
    font-size: 10px;
    padding: 2px 6px;
  }
  .pillars-grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }
  .pillar-card {
    padding: 18px 14px;
  }
  .custom-card-banner {
    padding: 20px 14px;
    text-align: left;
  }
  .custom-banner-btns {
    flex-direction: column;
    width: 100%;
    gap: 10px;
  }
  .custom-banner-btns .btn-gold, .custom-banner-btns .btn-outline {
    width: 100%;
    justify-content: center;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
    margin-bottom: 24px;
  }
  .modal-box {
    width: 96vw;
    max-height: 92vh;
    border-radius: 12px;
  }
  .modal-product-layout {
    grid-template-columns: 1fr;
    padding: 18px 14px;
    gap: 14px;
  }
  .modal-product-btns {
    flex-direction: column;
    width: 100%;
    gap: 8px;
  }
  .modal-product-btns button {
    width: 100%;
    justify-content: center;
  }
  .modal-checkout-body {
    padding: 18px 14px;
  }
  .modal-close-btn {
    top: 10px;
    right: 10px;
    width: 28px;
    height: 28px;
    font-size: 12px;
  }
  .cart-drawer {
    width: 100vw;
    max-width: 100vw;
  }
  .academy-grid {
    grid-template-columns: 1fr;
    gap: 16px;
  }
  .tut-modal-layout {
    grid-template-columns: 1fr;
    padding: 16px 12px;
    gap: 14px;
  }
  .tut-speed-bar {
    flex-wrap: wrap;
    gap: 6px;
  }
  .tut-speed-btn {
    flex: 1;
    text-align: center;
    padding: 6px 8px;
    font-size: 11px;
  }
  .tut-deck-purchase-card {
    flex-direction: column;
    align-items: stretch;
    gap: 10px;
  }
}