:root {
  --bg: #000000;
  --bg-1: #0a0a0b;
  --bg-2: #101013;
  --bg-3: #17171b;
  --line: #1e1e23;
  --line-2: #2c2c33;
  --text: #f5f6f7;
  --text-2: #9b9ba3;
  --text-3: #63636c;
  --white: #ffffff;
  --green: #00c076;
  --red: #f6465d;
  --radius: 16px;
  --radius-sm: 10px;
  --radius-pill: 999px;
  --container: 1200px;
  --font: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --mono: "SF Mono", "Cascadia Mono", Consolas, "Courier New", monospace;
  --header-h: 68px;
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

body.nav-open {
  overflow: hidden;
}

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

ul,
ol {
  list-style: none;
}

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

::selection {
  background: rgba(255, 255, 255, 0.92);
  color: #000;
}

::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: var(--bg);
}

::-webkit-scrollbar-thumb {
  background: #2a2a31;
  border-radius: 6px;
}

::-webkit-scrollbar-thumb:hover {
  background: #3a3a43;
}

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

.up {
  color: var(--green);
}

.down {
  color: var(--red);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-2);
  border: 1px solid var(--line-2);
  border-radius: var(--radius-pill);
  padding: 7px 16px;
  margin-bottom: 24px;
}

.eyebrow::before {
  content: "";
  width: 6px;
  height: 6px;
  transform: rotate(45deg);
  background: var(--white);
}

.section {
  padding: 96px 0;
}

.section-head {
  max-width: 720px;
  margin: 0 auto 56px;
  text-align: center;
}

.section-head.left {
  margin-left: 0;
  text-align: left;
}

.section-title {
  font-size: clamp(28px, 3.4vw, 40px);
  font-weight: 700;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 16px;
}

.section-sub {
  font-size: 16px;
  color: var(--text-2);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: var(--radius-pill);
  font-size: 15px;
  font-weight: 600;
  line-height: 1;
  padding: 15px 30px;
  transition: transform 0.2s ease, background 0.2s ease, color 0.2s ease, border-color 0.2s ease, opacity 0.2s ease;
  white-space: nowrap;
}

.btn-primary {
  background: var(--white);
  color: #000;
}

.btn-primary:hover {
  background: #e6e6ea;
  transform: translateY(-2px);
}

.btn-ghost {
  border: 1px solid var(--line-2);
  color: var(--text);
}

.btn-ghost:hover {
  border-color: var(--text-2);
  background: rgba(255, 255, 255, 0.05);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 11px 22px;
  font-size: 14px;
}

.btn-lg {
  padding: 18px 38px;
  font-size: 16px;
}

.btn-block {
  width: 100%;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(0, 0, 0, 0.72);
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.25s ease, background 0.25s ease;
}

.site-header.scrolled {
  background: rgba(0, 0, 0, 0.88);
  border-bottom-color: var(--line);
}

.nav-wrap {
  display: flex;
  align-items: center;
  height: var(--header-h);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.brand-mark {
  width: 26px;
  height: 26px;
}

.brand-name {
  font-size: 19px;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: 8px;
  flex: 1;
  margin-left: 36px;
}

.nav-link {
  font-size: 15px;
  color: var(--text-2);
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  transition: color 0.2s ease;
}

.nav-link:hover {
  color: var(--text);
}

.nav-link.active {
  color: var(--text);
  font-weight: 600;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-left: auto;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  margin-left: auto;
  flex-shrink: 0;
}

.nav-toggle span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 0 auto;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.nav-toggle.open span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.open span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.open span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

.mobile-nav {
  display: none;
  flex-direction: column;
  gap: 4px;
  padding: 8px 24px 24px;
  background: rgba(0, 0, 0, 0.96);
  border-bottom: 1px solid var(--line);
}

.mobile-nav a {
  font-size: 16px;
  color: var(--text-2);
  padding: 14px 4px;
  border-bottom: 1px solid var(--line);
}

.mobile-nav a:hover,
.mobile-nav a.active {
  color: var(--text);
}

.mobile-nav .btn {
  margin-top: 18px;
  border-bottom: none;
  color: #000;
}

.mobile-nav .btn:hover {
  color: #000;
}

.ticker {
  position: relative;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--bg-1);
  overflow: hidden;
}

.ticker-label {
  position: absolute;
  left: 0;
  top: 0;
  bottom: 0;
  z-index: 2;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 20px 0 24px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.06em;
  background: var(--bg-1);
  border-right: 1px solid var(--line);
}

.ticker-label::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--green);
}

.ticker-viewport {
  overflow: hidden;
  margin-left: 148px;
}

.ticker-track {
  display: inline-flex;
  align-items: center;
  height: 46px;
  animation: ticker-scroll 42s linear infinite;
  will-change: transform;
}

.ticker:hover .ticker-track {
  animation-play-state: paused;
}

.tick {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 0 28px;
  border-right: 1px solid var(--line);
  font-size: 13px;
  white-space: nowrap;
}

.tick-pair {
  font-weight: 600;
  color: var(--text);
}

.tick-price {
  color: var(--text-2);
  font-family: var(--mono);
}

.tick-chg {
  font-family: var(--mono);
  font-weight: 600;
}

@keyframes ticker-scroll {
  from {
    transform: translateX(0);
  }
  to {
    transform: translateX(-50%);
  }
}

.hero {
  position: relative;
  padding: 116px 0 96px;
  text-align: center;
  overflow: hidden;
}

.hero-glow {
  position: absolute;
  left: 50%;
  top: -240px;
  transform: translateX(-50%);
  width: 920px;
  height: 620px;
  background: radial-gradient(closest-side, rgba(255, 255, 255, 0.14), transparent 72%);
  pointer-events: none;
}

.hero-lines {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 72px 72px;
  -webkit-mask-image: radial-gradient(closest-side at 50% 30%, #000 30%, transparent 100%);
  mask-image: radial-gradient(closest-side at 50% 30%, #000 30%, transparent 100%);
  pointer-events: none;
}

.hero-inner {
  position: relative;
}

.hero-title {
  font-size: clamp(38px, 6.4vw, 74px);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.03em;
  margin-bottom: 24px;
  animation: rise 0.8s ease both;
}

.hero-sub {
  max-width: 640px;
  margin: 0 auto 40px;
  font-size: 17px;
  color: var(--text-2);
  animation: rise 0.8s ease 0.12s both;
}

.hero-cta {
  display: flex;
  justify-content: center;
  gap: 16px;
  animation: rise 0.8s ease 0.2s both;
}

.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  max-width: 920px;
  margin: 72px auto 0;
  padding-top: 40px;
  border-top: 1px solid var(--line);
  animation: rise 0.8s ease 0.3s both;
}

.hero-stats .stat strong {
  display: block;
  font-size: clamp(22px, 2.6vw, 30px);
  font-weight: 700;
  letter-spacing: -0.02em;
}

.hero-stats .stat span {
  font-size: 13px;
  color: var(--text-3);
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(22px);
  }
  to {
    opacity: 1;
    transform: none;
  }
}

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

.feature-card {
  background: var(--bg-1);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 26px;
  transition: transform 0.25s ease, border-color 0.25s ease, background 0.25s ease;
}

.feature-card:hover {
  transform: translateY(-4px);
  border-color: var(--line-2);
  background: var(--bg-2);
}

.feature-icon {
  width: 46px;
  height: 46px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 12px;
  background: var(--bg-3);
  border: 1px solid var(--line-2);
  margin-bottom: 22px;
}

.feature-icon svg {
  width: 22px;
  height: 22px;
  stroke: var(--white);
}

.feature-card h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 10px;
}

.feature-card p {
  font-size: 14px;
  color: var(--text-2);
}

.market-panel {
  background: var(--bg-1);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.table-scroll {
  overflow-x: auto;
}

.market-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 680px;
}

.market-table th {
  text-align: left;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-3);
  padding: 18px 24px;
  border-bottom: 1px solid var(--line);
}

.market-table td {
  padding: 18px 24px;
  border-bottom: 1px solid var(--line);
  font-size: 15px;
}

.market-table tbody tr:last-child td {
  border-bottom: none;
}

.market-table tbody tr {
  transition: background 0.2s ease;
}

.market-table tbody tr:hover {
  background: var(--bg-2);
}

.pair-cell {
  display: flex;
  align-items: center;
  gap: 12px;
}

.pair-badge {
  width: 34px;
  height: 34px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 700;
  background: var(--bg-3);
  border: 1px solid var(--line-2);
  flex-shrink: 0;
}

.pair-name {
  font-weight: 600;
}

.price-cell {
  font-family: var(--mono);
  font-size: 14px;
}

.chg-cell {
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 600;
}

.market-cta {
  display: flex;
  justify-content: center;
  margin-top: 36px;
}

.course-card {
  display: flex;
  flex-direction: column;
  background: var(--bg-1);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  transition: transform 0.25s ease, border-color 0.25s ease;
}

.course-card:hover {
  transform: translateY(-4px);
  border-color: var(--line-2);
}

.course-cover {
  position: relative;
  height: 160px;
  display: flex;
  align-items: flex-end;
  padding: 20px;
  background: linear-gradient(135deg, #17171b 0%, #0b0b0d 100%);
  border-bottom: 1px solid var(--line);
}

.course-cover.tone-2 {
  background: linear-gradient(135deg, #101014 0%, #1a1a20 55%, #0b0b0d 100%);
}

.course-cover.tone-3 {
  background: linear-gradient(225deg, #141419 0%, #0b0b0d 100%);
}

.course-cover.tone-4 {
  background: linear-gradient(160deg, #1a1a20 0%, #101013 60%, #0b0b0d 100%);
}

.course-cover::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255, 255, 255, 0.04) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, 0.04) 1px, transparent 1px);
  background-size: 36px 36px;
  opacity: 0.6;
  pointer-events: none;
}

.cover-num {
  position: relative;
  z-index: 1;
  font-family: var(--mono);
  font-size: 44px;
  font-weight: 700;
  letter-spacing: -0.04em;
  color: rgba(255, 255, 255, 0.22);
  line-height: 1;
}

.course-level {
  position: absolute;
  top: 16px;
  left: 16px;
  z-index: 1;
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.06em;
  padding: 6px 12px;
  border-radius: var(--radius-pill);
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.16);
  -webkit-backdrop-filter: blur(6px);
  backdrop-filter: blur(6px);
}

.course-body {
  display: flex;
  flex-direction: column;
  flex: 1;
  padding: 24px 24px 26px;
}

.course-title {
  font-size: 18px;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 10px;
}

.course-desc {
  font-size: 14px;
  color: var(--text-2);
  margin-bottom: 18px;
  flex: 1;
}

.course-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  font-size: 13px;
  color: var(--text-3);
  padding-top: 16px;
  border-top: 1px solid var(--line);
}

.course-meta span {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.course-foot {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 18px;
}

.course-link {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: gap 0.2s ease;
}

.course-link:hover {
  gap: 10px;
}

.course-link::after {
  content: "→";
}

.courses-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.section-more {
  display: flex;
  justify-content: center;
  margin-top: 44px;
}

.page-hero {
  position: relative;
  padding: 108px 0 72px;
  border-bottom: 1px solid var(--line);
  background: linear-gradient(180deg, #0a0a0b 0%, #000000 100%);
  overflow: hidden;
}

.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255, 255, 255, 0.03) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
  background-size: 64px 64px;
  -webkit-mask-image: radial-gradient(closest-side at 30% 20%, #000 20%, transparent 100%);
  mask-image: radial-gradient(closest-side at 30% 20%, #000 20%, transparent 100%);
  pointer-events: none;
}

.page-hero .container {
  position: relative;
}

.page-hero h1 {
  font-size: clamp(32px, 4.6vw, 54px);
  font-weight: 800;
  letter-spacing: -0.025em;
  line-height: 1.12;
  margin-bottom: 18px;
}

.page-hero .page-sub {
  max-width: 660px;
  font-size: 16px;
  color: var(--text-2);
}

.breadcrumb {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 13px;
  color: var(--text-3);
  margin-bottom: 26px;
}

.breadcrumb a {
  color: var(--text-3);
  transition: color 0.2s ease;
}

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

.breadcrumb .sep {
  color: var(--line-2);
}

.breadcrumb .current {
  color: var(--text-2);
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 44px;
}

.filter-btn {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-2);
  padding: 10px 22px;
  border: 1px solid var(--line-2);
  border-radius: var(--radius-pill);
  transition: all 0.2s ease;
}

.filter-btn:hover {
  color: var(--text);
  border-color: var(--text-3);
}

.filter-btn.active {
  background: var(--white);
  border-color: var(--white);
  color: #000;
  font-weight: 600;
}

.course-card.hidden {
  display: none;
}

.course-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 56px;
  align-items: start;
}

.course-main .lead {
  font-size: 17px;
  color: var(--text-2);
  margin-bottom: 40px;
}

.course-block {
  margin-bottom: 48px;
}

.course-block h2 {
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.015em;
  margin-bottom: 22px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.learn-list {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px 32px;
}

.learn-list li {
  position: relative;
  padding-left: 28px;
  font-size: 15px;
  color: var(--text-2);
}

.learn-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 0;
  color: var(--green);
  font-weight: 700;
}

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

.audience-list li {
  position: relative;
  padding-left: 24px;
  font-size: 15px;
  color: var(--text-2);
}

.audience-list li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 10px;
  width: 8px;
  height: 8px;
  transform: rotate(45deg);
  border: 1px solid var(--text-3);
}

.accordion {
  border-top: 1px solid var(--line);
}

.acc-item {
  border-bottom: 1px solid var(--line);
}

.acc-head {
  width: 100%;
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px 4px;
  text-align: left;
}

.acc-index {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--text-3);
  width: 34px;
  flex-shrink: 0;
}

.acc-title {
  flex: 1;
  font-size: 16px;
  font-weight: 600;
}

.acc-count {
  font-size: 13px;
  color: var(--text-3);
  margin-right: 6px;
}

.acc-icon {
  position: relative;
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.acc-icon::before,
.acc-icon::after {
  content: "";
  position: absolute;
  left: 50%;
  top: 50%;
  background: var(--text-2);
  transition: transform 0.25s ease, background 0.25s ease;
}

.acc-icon::before {
  width: 12px;
  height: 2px;
  transform: translate(-50%, -50%);
}

.acc-icon::after {
  width: 2px;
  height: 12px;
  transform: translate(-50%, -50%);
}

.acc-item.open .acc-icon::before {
  background: var(--text);
}

.acc-item.open .acc-icon::after {
  transform: translate(-50%, -50%) rotate(90deg);
  background: var(--text);
}

.acc-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}

.acc-lessons {
  padding: 0 4px 18px 54px;
}

.acc-lessons li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 14px;
  color: var(--text-2);
  padding: 9px 0;
}

.acc-lessons li span:last-child {
  color: var(--text-3);
  font-family: var(--mono);
  font-size: 12px;
  flex-shrink: 0;
}

.course-side {
  position: sticky;
  top: calc(var(--header-h) + 24px);
  display: grid;
  gap: 20px;
}

.info-card {
  background: var(--bg-1);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px;
}

.info-card .btn {
  margin-bottom: 22px;
}

.info-list {
  display: grid;
  gap: 14px;
}

.info-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 14px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line);
}

.info-list li:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.info-list .k {
  color: var(--text-3);
}

.info-list .v {
  font-weight: 600;
}

.instructor {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-bottom: 16px;
}

.avatar {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 15px;
  font-weight: 700;
  background: linear-gradient(135deg, #2b2b33, #101013);
  border: 1px solid var(--line-2);
  flex-shrink: 0;
}

.instructor strong {
  display: block;
  font-size: 16px;
}

.instructor span {
  font-size: 13px;
  color: var(--text-3);
}

.instructor-bio {
  font-size: 14px;
  color: var(--text-2);
}

.cta-band {
  position: relative;
  text-align: center;
  background: var(--bg-1);
  border: 1px solid var(--line);
  border-radius: 24px;
  padding: 64px 32px;
  overflow: hidden;
}

.cta-band::before {
  content: "";
  position: absolute;
  left: 50%;
  top: -160px;
  transform: translateX(-50%);
  width: 560px;
  height: 320px;
  background: radial-gradient(closest-side, rgba(255, 255, 255, 0.1), transparent 72%);
  pointer-events: none;
}

.cta-band h2 {
  position: relative;
  font-size: clamp(26px, 3.2vw, 36px);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 14px;
}

.cta-band p {
  position: relative;
  max-width: 560px;
  margin: 0 auto 32px;
  font-size: 15px;
  color: var(--text-2);
}

.cta-actions {
  position: relative;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 16px;
}

.about-story {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: 64px;
  align-items: center;
}

.about-story h2 {
  font-size: clamp(26px, 3vw, 36px);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}

.about-story p {
  font-size: 15px;
  color: var(--text-2);
  margin-bottom: 16px;
}

.story-visual {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 320px;
  background: var(--bg-1);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.story-visual::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255, 255, 255, 0.035) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, 0.035) 1px, transparent 1px);
  background-size: 48px 48px;
}

.story-visual svg {
  position: relative;
  width: 132px;
  height: 132px;
}

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

.stat-cell {
  background: var(--bg-1);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 26px;
}

.stat-cell strong {
  display: block;
  font-size: clamp(24px, 2.8vw, 32px);
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 6px;
}

.stat-cell span {
  font-size: 14px;
  color: var(--text-2);
}

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

.value-card {
  background: var(--bg-1);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 26px;
  transition: transform 0.25s ease, border-color 0.25s ease;
}

.value-card:hover {
  transform: translateY(-4px);
  border-color: var(--line-2);
}

.value-num {
  font-family: var(--mono);
  font-size: 13px;
  color: var(--text-3);
  margin-bottom: 18px;
}

.value-card h3 {
  font-size: 17px;
  font-weight: 600;
  margin-bottom: 10px;
}

.value-card p {
  font-size: 14px;
  color: var(--text-2);
}

.timeline {
  position: relative;
  max-width: 760px;
  margin: 0 auto;
  padding-left: 28px;
}

.timeline::before {
  content: "";
  position: absolute;
  left: 5px;
  top: 8px;
  bottom: 8px;
  width: 1px;
  background: var(--line-2);
}

.timeline li {
  position: relative;
  padding: 0 0 34px 24px;
}

.timeline li:last-child {
  padding-bottom: 0;
}

.timeline li::before {
  content: "";
  position: absolute;
  left: -28px;
  top: 7px;
  width: 11px;
  height: 11px;
  transform: rotate(45deg);
  background: var(--bg);
  border: 1px solid var(--text-2);
}

.timeline li:hover::before {
  background: var(--white);
  border-color: var(--white);
}

.timeline .year {
  display: inline-block;
  font-family: var(--mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 6px;
}

.timeline p {
  font-size: 15px;
  color: var(--text-2);
}

.contact-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.contact-card {
  background: var(--bg-1);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 30px 26px;
  transition: transform 0.25s ease, border-color 0.25s ease;
}

.contact-card:hover {
  transform: translateY(-4px);
  border-color: var(--line-2);
}

.contact-card h3 {
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}

.contact-card p {
  font-size: 14px;
  color: var(--text-2);
  margin-bottom: 16px;
}

.contact-card a {
  font-size: 14px;
  font-weight: 600;
  color: var(--text);
  border-bottom: 1px solid var(--line-2);
  padding-bottom: 2px;
  transition: border-color 0.2s ease;
}

.contact-card a:hover {
  border-color: var(--text);
}

.site-footer {
  border-top: 1px solid var(--line);
  background: var(--bg-1);
  padding-top: 64px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 52px;
}

.footer-brand p {
  max-width: 320px;
  margin-top: 18px;
  font-size: 14px;
  color: var(--text-2);
}

.footer-col h3 {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 18px;
}

.footer-col a {
  display: block;
  font-size: 14px;
  color: var(--text-2);
  padding: 6px 0;
  transition: color 0.2s ease;
}

.footer-col a:hover {
  color: var(--text);
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding: 24px 24px 32px;
  border-top: 1px solid var(--line);
  font-size: 13px;
  color: var(--text-3);
}

body.js .reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}

body.js .reveal.in {
  opacity: 1;
  transform: none;
}

body.js .reveal.d1 {
  transition-delay: 0.08s;
}

body.js .reveal.d2 {
  transition-delay: 0.16s;
}

body.js .reveal.d3 {
  transition-delay: 0.24s;
}

@media (max-width: 1120px) {
  .nav-menu {
    margin-left: 20px;
    gap: 2px;
  }
  .nav-link {
    padding: 10px 10px;
    font-size: 14px;
  }
  .nav-actions {
    gap: 12px;
  }
  .features-grid,
  .values-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 992px) {
  .nav-menu,
  .nav-actions {
    display: none;
  }
  .nav-toggle {
    display: flex;
  }
  .mobile-nav.open {
    display: flex;
  }
  .hero {
    padding: 84px 0 72px;
  }
  .courses-grid,
  .features-grid,
  .values-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .course-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .course-side {
    position: static;
  }
  .about-story {
    grid-template-columns: 1fr;
    gap: 36px;
  }
  .stat-band {
    grid-template-columns: repeat(2, 1fr);
  }
  .contact-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .section {
    padding: 72px 0;
  }
  .page-hero {
    padding: 76px 0 56px;
  }
}

@media (max-width: 768px) {
  .hero-stats {
    grid-template-columns: repeat(2, 1fr);
    gap: 28px 16px;
    margin-top: 56px;
  }
  .learn-list {
    grid-template-columns: 1fr;
  }
  .acc-lessons {
    padding-left: 4px;
  }
  .cta-band {
    padding: 48px 22px;
  }
  .timeline {
    padding-left: 22px;
  }
  .timeline li {
    padding-left: 18px;
  }
}

@media (max-width: 640px) {
  .container {
    padding: 0 18px;
  }
  .ticker-viewport {
    margin-left: 118px;
  }
  .ticker-label {
    padding: 0 12px 0 18px;
    font-size: 12px;
  }
  .hero-title {
    letter-spacing: -0.02em;
  }
  .hero-sub {
    font-size: 15px;
  }
  .courses-grid,
  .features-grid,
  .values-grid,
  .stat-band,
  .contact-grid {
    grid-template-columns: 1fr;
  }
  .section-head {
    margin-bottom: 40px;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }
  .footer-bottom {
    flex-direction: column;
    align-items: flex-start;
  }
  .cta-actions .btn {
    width: 100%;
  }
  .course-cover {
    height: 140px;
  }
}

@media (max-width: 420px) {
  .hero-cta {
    flex-direction: column;
  }
  .hero-cta .btn {
    width: 100%;
  }
  .filter-btn {
    padding: 9px 16px;
    font-size: 13px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  *,
  *::before,
  *::after {
    animation-duration: 0.001s !important;
    transition-duration: 0.001s !important;
  }
}