:root {
  --bg: #08080a;
  --bg-soft: #0b0b0e;
  --surface: #0e0e13;
  --surface-2: #12121a;
  --text: #ededef;
  --muted: #8a8f98;
  --muted-dim: #5c616c;
  --accent: #6366f1;
  --accent-2: #a855f7;
  --accent-cyan: #22d3ee;
  --border: rgba(255, 255, 255, 0.08);
  --border-strong: rgba(255, 255, 255, 0.16);
  --font-sans: "Inter", "SF Pro Display", "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", sans-serif;
  --font-mono: "JetBrains Mono", "SF Mono", "Cascadia Code", Consolas, "Courier New", monospace;
  --header-h: 72px;
  --radius: 16px;
  --ease: cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 12px);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

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

ul,
ol {
  list-style: none;
}

.bg-grid {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.025) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, black 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, black 30%, transparent 75%);
}

.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  position: relative;
  z-index: 1;
}

.section {
  padding: 96px 0;
  position: relative;
}

.section-head {
  max-width: 720px;
  margin-bottom: 56px;
}

.section-head.center {
  margin-inline: auto;
  text-align: center;
}

.kicker {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent-cyan);
  background: rgba(34, 211, 238, 0.06);
  border: 1px solid rgba(34, 211, 238, 0.18);
  padding: 6px 14px;
  border-radius: 999px;
  margin-bottom: 20px;
}

.dot-pulse {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent-cyan);
  animation: pulse 2.2s var(--ease) infinite;
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 0 rgba(34, 211, 238, 0.5); }
  50% { box-shadow: 0 0 0 6px rgba(34, 211, 238, 0); }
}

.section-title {
  font-size: clamp(1.9rem, 3.6vw, 2.8rem);
  font-weight: 650;
  letter-spacing: -0.02em;
  line-height: 1.2;
  margin-bottom: 18px;
}

.section-desc {
  color: var(--muted);
  font-size: 1.02rem;
  max-width: 640px;
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  border-radius: 12px;
  font-size: 0.95rem;
  font-weight: 560;
  border: 1px solid transparent;
  cursor: pointer;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease), border-color 0.3s var(--ease), background 0.3s var(--ease);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
}

.btn-sm {
  padding: 9px 18px;
  font-size: 0.88rem;
}

.btn-lg {
  padding: 16px 34px;
  font-size: 1.02rem;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-2) 100%);
  color: #fff;
  box-shadow: 0 4px 18px rgba(99, 102, 241, 0.32), inset 0 1px 0 rgba(255, 255, 255, 0.18);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(139, 92, 246, 0.45), inset 0 1px 0 rgba(255, 255, 255, 0.22);
}

.btn-primary::after {
  content: "";
  position: absolute;
  top: 0;
  left: -80%;
  width: 50%;
  height: 100%;
  background: linear-gradient(100deg, transparent, rgba(255, 255, 255, 0.35), transparent);
  transform: skewX(-20deg);
  transition: left 0.6s var(--ease);
}

.btn-primary:hover::after {
  left: 130%;
}

.btn-ghost {
  background: rgba(255, 255, 255, 0.02);
  border-color: var(--border-strong);
  color: var(--text);
}

.btn-ghost:hover {
  border-color: rgba(99, 102, 241, 0.5);
  background: rgba(99, 102, 241, 0.08);
  transform: translateY(-2px);
  box-shadow: 0 0 24px rgba(99, 102, 241, 0.15);
}

/* ---------- Header ---------- */

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--header-h);
  transition: background 0.35s var(--ease), border-color 0.35s var(--ease), backdrop-filter 0.35s var(--ease), box-shadow 0.35s var(--ease);
  background: transparent;
  border-bottom: 1px solid transparent;
}

.site-header.is-scrolled {
  background: rgba(8, 8, 10, 0.72);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom-color: var(--border);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.5);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  gap: 24px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

.brand-mark {
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.94);
  border-radius: 10px;
  padding: 4px 10px;
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.4), inset 0 0 0 1px rgba(255, 255, 255, 0.3);
}

.brand-mark img {
  height: 30px;
  width: auto;
}

.brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.brand-name {
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.02em;
}

.brand-en {
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.3em;
  color: var(--muted);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 4px;
}

.nav-link {
  padding: 9px 14px;
  font-size: 0.92rem;
  color: var(--muted);
  border-radius: 9px;
  transition: color 0.25s var(--ease), background 0.25s var(--ease);
}

.nav-link:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.04);
}

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

.nav-link.is-active::after {
  content: "";
  display: block;
  height: 2px;
  width: 18px;
  margin: 4px auto 0;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 42px;
  height: 42px;
  padding: 10px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border);
  border-radius: 10px;
  cursor: pointer;
}

.nav-toggle .bar {
  height: 2px;
  width: 100%;
  border-radius: 2px;
  background: var(--text);
  transition: transform 0.3s var(--ease), opacity 0.3s var(--ease);
}

.nav-toggle.is-open .bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.is-open .bar:nth-child(2) { opacity: 0; }
.nav-toggle.is-open .bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */

.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-top: calc(var(--header-h) + 40px);
  padding-bottom: 40px;
  overflow: hidden;
}

.hero-canvas {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

.hero-glow {
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  z-index: 0;
  pointer-events: none;
}

.hero-glow-a {
  width: 560px;
  height: 560px;
  top: -140px;
  right: -80px;
  background: radial-gradient(circle, rgba(99, 102, 241, 0.22), transparent 65%);
}

.hero-glow-b {
  width: 480px;
  height: 480px;
  bottom: -160px;
  left: -120px;
  background: radial-gradient(circle, rgba(168, 85, 247, 0.16), transparent 65%);
}

.hero-inner {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 48px;
}

.hero-title {
  font-size: clamp(2.6rem, 6vw, 4.8rem);
  font-weight: 700;
  letter-spacing: -0.035em;
  line-height: 1.06;
  margin: 18px 0 10px;
}

.hero-title em {
  font-style: normal;
  background: linear-gradient(120deg, var(--accent), var(--accent-2), var(--accent-cyan));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-sub {
  font-size: clamp(0.98rem, 1.6vw, 1.15rem);
  font-weight: 560;
  color: var(--muted);
  letter-spacing: 0.05em;
  margin-bottom: 20px;
}

.hero-desc {
  color: var(--muted);
  max-width: 520px;
  margin-bottom: 32px;
}

.hero-cta {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 44px;
}

.hero-meta {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  max-width: 520px;
}

.hero-meta > div {
  padding: 12px 14px;
  border-left: 1px solid var(--border-strong);
}

.hero-meta dt {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text);
}

.hero-meta dd {
  font-size: 0.75rem;
  color: var(--muted-dim);
  margin-top: 2px;
}

/* Hero orb */

.hero-orb {
  position: relative;
  width: min(460px, 100%);
  aspect-ratio: 1;
  margin: 0 auto;
}

.orb-ring {
  position: absolute;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.09);
}

.ring-outer {
  inset: 0;
  border-style: dashed;
  animation: spin 60s linear infinite;
}

.ring-mid {
  inset: 14%;
  border-color: rgba(99, 102, 241, 0.3);
  box-shadow: 0 0 60px rgba(99, 102, 241, 0.1), inset 0 0 60px rgba(99, 102, 241, 0.06);
  animation: spin 40s linear infinite reverse;
}

.ring-inner {
  inset: 30%;
  border-color: rgba(168, 85, 247, 0.35);
  box-shadow: 0 0 80px rgba(168, 85, 247, 0.14), inset 0 0 80px rgba(168, 85, 247, 0.08);
  animation: spin 26s linear infinite;
}

.orb-core {
  position: absolute;
  inset: 38%;
  border-radius: 50%;
  background: radial-gradient(circle at 32% 30%, rgba(99, 102, 241, 0.55), rgba(8, 8, 10, 0.2) 70%);
  box-shadow: 0 0 70px rgba(99, 102, 241, 0.35), inset 0 0 34px rgba(168, 85, 247, 0.3);
}

.orb-core::after {
  content: "";
  position: absolute;
  inset: 22%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(255, 255, 255, 0.55), rgba(255, 255, 255, 0));
  filter: blur(4px);
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.orb-node {
  position: absolute;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--accent-cyan);
  box-shadow: 0 0 14px rgba(34, 211, 238, 0.8);
  animation: nodeFloat 5s var(--ease) infinite;
}

@keyframes nodeFloat {
  0%, 100% { transform: translateY(0); opacity: 1; }
  50% { transform: translateY(-8px); opacity: 0.6; }
}

.n1 { top: 6%; left: 52%; }
.n2 { top: 24%; left: 88%; animation-delay: 0.7s; }
.n3 { top: 58%; left: 94%; animation-delay: 1.4s; }
.n4 { bottom: 12%; left: 60%; animation-delay: 2s; }
.n5 { bottom: 20%; left: 24%; animation-delay: 2.6s; }
.n6 { top: 30%; left: 6%; animation-delay: 3.2s; }

.hash-card {
  position: absolute;
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: 10px 14px;
  border-radius: 12px;
  background: rgba(14, 14, 19, 0.72);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid var(--border);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  animation: cardFloat 6s var(--ease) infinite;
}

@keyframes cardFloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

.hash-label {
  font-size: 0.68rem;
  color: var(--muted);
  letter-spacing: 0.08em;
}

.hash-value {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-cyan);
}

.hash-card-1 { top: 14%; right: -4%; animation-delay: 0.4s; }
.hash-card-2 { bottom: 20%; left: -6%; animation-delay: 1.6s; }
.hash-card-3 { top: 56%; left: 4%; animation-delay: 2.8s; }

/* Chain strip */

.chain-strip-wrap {
  position: relative;
  z-index: 1;
  margin-top: 40px;
}

.chain-strip {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: center;
  padding: 16px 24px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: rgba(14, 14, 19, 0.6);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.chain-head {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.16em;
  color: var(--muted-dim);
  text-transform: uppercase;
  margin-right: 8px;
}

.chain-node {
  font-size: 0.92rem;
  font-weight: 560;
  color: var(--text);
}

.chain-arrow {
  width: 34px;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  position: relative;
  overflow: hidden;
  border-radius: 2px;
}

.chain-arrow::after {
  content: "";
  position: absolute;
  top: 0;
  left: -40%;
  width: 40%;
  height: 100%;
  background: rgba(255, 255, 255, 0.9);
  border-radius: 2px;
  animation: flowDash 2.4s var(--ease) infinite;
}

@keyframes flowDash {
  0% { left: -40%; }
  100% { left: 120%; }
}

.chain-loop {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent-cyan);
  letter-spacing: 0.08em;
  margin-left: 8px;
}

/* ---------- About ---------- */

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

.about-grid {
  display: grid;
  grid-template-columns: 1.25fr 0.75fr;
  gap: 48px;
  align-items: start;
}

.about-main h3 {
  font-size: 1.5rem;
  font-weight: 650;
  letter-spacing: -0.01em;
  margin-bottom: 18px;
}

.about-main p {
  color: var(--muted);
  margin-bottom: 16px;
}

.about-main strong {
  color: var(--text);
  font-weight: 600;
}

.capability-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.capability-tags li {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text);
  padding: 7px 14px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(99, 102, 241, 0.1), rgba(255, 255, 255, 0.02));
}

.trio-grid {
  display: grid;
  gap: 14px;
}

.trio-card {
  padding: 24px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: linear-gradient(180deg, var(--surface) 0%, var(--bg) 100%);
  transition: transform 0.35s var(--ease), border-color 0.35s var(--ease), box-shadow 0.35s var(--ease);
}

.trio-card:hover {
  transform: translateY(-4px);
  border-color: rgba(99, 102, 241, 0.4);
  box-shadow: 0 14px 40px rgba(99, 102, 241, 0.12);
}

.trio-icon {
  display: inline-block;
  font-size: 1.1rem;
  color: var(--accent-2);
  margin-bottom: 12px;
}

.trio-card h4 {
  font-size: 1.1rem;
  font-weight: 650;
  margin-bottom: 6px;
}

.trio-card p {
  color: var(--muted);
  font-size: 0.93rem;
}

/* ---------- Business / Bento ---------- */

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

.bento-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-auto-rows: minmax(200px, auto);
  gap: 16px;
}

.bento-card {
  position: relative;
  padding: 28px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: linear-gradient(180deg, var(--surface) 0%, var(--bg) 100%);
  overflow: hidden;
  transition: transform 0.35s var(--ease), border-color 0.35s var(--ease), box-shadow 0.35s var(--ease);
}

.bento-card::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(99, 102, 241, 0.55), transparent);
  opacity: 0;
  transition: opacity 0.35s var(--ease);
}

.bento-card:hover {
  transform: translateY(-5px);
  border-color: rgba(255, 255, 255, 0.16);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.55), 0 0 0 1px rgba(99, 102, 241, 0.08);
}

.bento-card:hover::before {
  opacity: 1;
}

.bento-large {
  grid-column: span 2;
  grid-row: span 2;
}

.bento-wide {
  grid-column: span 2;
}

.bento-top {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 14px;
}

.bento-num {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent-cyan);
  opacity: 0.8;
}

.bento-top h3 {
  font-size: 1.3rem;
  font-weight: 650;
  letter-spacing: -0.01em;
}

.bento-lead {
  color: var(--muted);
  font-size: 0.95rem;
  margin-bottom: 18px;
}

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

.bento-list > div {
  padding: 14px 16px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.015);
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease);
}

.bento-list > div:hover {
  border-color: rgba(99, 102, 241, 0.35);
  background: rgba(99, 102, 241, 0.05);
}

.bento-list h4 {
  font-size: 0.98rem;
  font-weight: 620;
  margin-bottom: 4px;
}

.bento-list p,
.bento-list li {
  color: var(--muted);
  font-size: 0.9rem;
}

.bento-list li {
  padding: 11px 14px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.015);
  transition: border-color 0.3s var(--ease), background 0.3s var(--ease);
}

.bento-list li:hover {
  border-color: rgba(99, 102, 241, 0.35);
  background: rgba(99, 102, 241, 0.05);
}

.bento-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.bento-tags span {
  font-size: 0.88rem;
  color: var(--muted);
  padding: 9px 14px;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.015);
  transition: border-color 0.3s var(--ease), color 0.3s var(--ease);
}

.bento-tags span:hover {
  border-color: rgba(168, 85, 247, 0.4);
  color: var(--text);
}

/* ---------- Chain flow ---------- */

.chain {
  border-top: 1px solid var(--border);
  background: linear-gradient(180deg, var(--bg), var(--bg-soft));
}

.chain-flow {
  display: flex;
  align-items: stretch;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  counter-reset: none;
}

.chain-flow li {
  flex: 1 1 130px;
  max-width: 170px;
  position: relative;
  padding: 22px 18px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: linear-gradient(180deg, var(--surface) 0%, var(--bg) 100%);
  text-align: center;
  transition: transform 0.35s var(--ease), border-color 0.35s var(--ease), box-shadow 0.35s var(--ease);
}

.chain-flow li:hover {
  transform: translateY(-5px);
  border-color: rgba(99, 102, 241, 0.4);
  box-shadow: 0 14px 40px rgba(99, 102, 241, 0.12);
}

.flow-index {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--accent-cyan);
  margin-bottom: 10px;
}

.chain-flow h3 {
  font-size: 1.15rem;
  font-weight: 650;
  margin-bottom: 4px;
}

.chain-flow p {
  font-size: 0.8rem;
  color: var(--muted);
}

.chain-flow .flow-arrow {
  flex: 0 0 auto;
  width: 22px;
  border: none;
  background: none;
  padding: 0;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}

.chain-flow .flow-arrow::before {
  content: "";
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent-2));
  box-shadow: 0 0 10px rgba(99, 102, 241, 0.5);
  position: relative;
}

.chain-flow .flow-arrow::after {
  content: "";
  position: absolute;
  right: 0;
  width: 7px;
  height: 7px;
  border-top: 2px solid var(--accent-2);
  border-right: 2px solid var(--accent-2);
  transform: rotate(45deg);
}

.chain-note {
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--muted-dim);
  margin-top: 28px;
  letter-spacing: 0.04em;
}

/* ---------- Tech ---------- */

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

.tech-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.tech-card {
  position: relative;
  padding: 30px 26px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: linear-gradient(180deg, var(--surface) 0%, var(--bg) 100%);
  overflow: hidden;
  transition: transform 0.35s var(--ease), border-color 0.35s var(--ease), box-shadow 0.35s var(--ease);
}

.tech-card::after {
  content: "";
  position: absolute;
  top: -40%;
  left: -60%;
  width: 60%;
  height: 180%;
  background: linear-gradient(100deg, transparent, rgba(255, 255, 255, 0.05), transparent);
  transform: rotate(18deg);
  transition: left 0.7s var(--ease);
  pointer-events: none;
}

.tech-card:hover::after {
  left: 140%;
}

.tech-card:hover {
  transform: translateY(-5px);
  border-color: rgba(168, 85, 247, 0.4);
  box-shadow: 0 20px 50px rgba(99, 102, 241, 0.12);
}

.tech-glyph {
  font-size: 1.6rem;
  color: transparent;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  display: inline-block;
  margin-bottom: 16px;
}

.tech-card h3 {
  font-size: 1.2rem;
  font-weight: 650;
  margin-bottom: 2px;
}

.tech-en {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--muted-dim);
  margin-bottom: 14px;
}

.tech-card p:last-child {
  color: var(--muted);
  font-size: 0.92rem;
}

/* ---------- Vision ---------- */

.vision {
  position: relative;
  padding: 120px 0;
  text-align: center;
  border-top: 1px solid var(--border);
  overflow: hidden;
}

.vision .bg-grid {
  opacity: 0;
}

.vision-glow {
  position: absolute;
  inset: 0;
  z-index: 0;
  background:
    radial-gradient(ellipse 60% 80% at 50% 100%, rgba(99, 102, 241, 0.16), transparent 70%),
    radial-gradient(ellipse 40% 60% at 80% 0%, rgba(168, 85, 247, 0.12), transparent 70%);
  pointer-events: none;
}

.vision-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.vision-inner .kicker {
  align-self: center;
}

.vision h2 {
  font-size: clamp(2rem, 4.4vw, 3.3rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.18;
  margin-bottom: 20px;
}

.vision h2 em {
  font-style: normal;
  background: linear-gradient(120deg, var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.vision p {
  color: var(--muted);
  max-width: 560px;
  margin-bottom: 36px;
}

/* ---------- Contact ---------- */

.contact {
  position: relative;
  overflow: hidden;
  border-top: 1px solid var(--border);
}

.contact-glow {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 46% 70% at 78% 40%, rgba(99, 102, 241, 0.13), transparent 70%),
    radial-gradient(ellipse 40% 60% at 12% 70%, rgba(168, 85, 247, 0.09), transparent 70%);
}

.contact-shell {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 0;
  border-radius: 26px;
  border: 1px solid var(--border);
  background: linear-gradient(180deg, rgba(18, 18, 26, 0.7), rgba(8, 8, 10, 0.9));
  box-shadow: 0 30px 90px rgba(0, 0, 0, 0.45);
  overflow: hidden;
}

.contact-shell::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(99, 102, 241, 0.6), rgba(34, 211, 238, 0.4), transparent);
}

.contact-shell::after {
  content: "";
  position: absolute;
  inset: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.022) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.022) 1px, transparent 1px);
  background-size: 44px 44px;
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.55), transparent 70%);
  -webkit-mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.55), transparent 70%);
}

.contact-copy {
  position: relative;
  z-index: 1;
  padding: 56px 52px;
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.contact-desc {
  color: var(--muted);
  font-size: 1.02rem;
  max-width: 420px;
}

.contact-slogan {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  color: var(--accent-cyan);
  margin-top: 22px;
  padding-left: 14px;
  border-left: 2px solid var(--accent);
}

.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.contact-panel {
  position: relative;
  z-index: 1;
  padding: 44px 40px 36px;
  border-left: 1px solid var(--border);
  background: radial-gradient(ellipse 90% 60% at 50% 0%, rgba(99, 102, 241, 0.06), transparent 70%);
}

.contact-panel-title {
  font-size: 1.28rem;
  font-weight: 650;
  letter-spacing: -0.01em;
  margin-bottom: 26px;
}

.contact-grid-cards {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.contact-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 20px 18px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.018);
  transition: transform 0.35s var(--ease), border-color 0.35s var(--ease), box-shadow 0.35s var(--ease), background 0.35s var(--ease);
}

.contact-card:hover {
  transform: translateY(-4px);
  border-color: rgba(99, 102, 241, 0.42);
  background: rgba(99, 102, 241, 0.06);
  box-shadow: 0 14px 36px rgba(99, 102, 241, 0.14);
}

.contact-card-icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  border-radius: 12px;
  border: 1px solid rgba(34, 211, 238, 0.28);
  background: rgba(34, 211, 238, 0.07);
  color: var(--accent-cyan);
  transition: border-color 0.35s var(--ease), background 0.35s var(--ease), color 0.35s var(--ease), box-shadow 0.35s var(--ease);
}

.contact-card-icon-wechat {
  border-color: rgba(168, 85, 247, 0.3);
  background: rgba(168, 85, 247, 0.08);
  color: #c084fc;
}

.contact-card:hover .contact-card-icon {
  border-color: rgba(34, 211, 238, 0.55);
  background: rgba(34, 211, 238, 0.12);
  box-shadow: 0 0 20px rgba(34, 211, 238, 0.28);
}

.contact-card:hover .contact-card-icon-wechat {
  border-color: rgba(168, 85, 247, 0.55);
  background: rgba(168, 85, 247, 0.14);
  box-shadow: 0 0 20px rgba(168, 85, 247, 0.3);
}

.contact-card-body {
  display: flex;
  flex-direction: column;
  gap: 3px;
  min-width: 0;
}

.contact-card-label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.12em;
  color: var(--muted-dim);
  text-transform: uppercase;
}

.contact-card-value {
  font-size: 1.06rem;
  font-weight: 620;
  color: var(--text);
  letter-spacing: 0.01em;
  white-space: nowrap;
}

.contact-note {
  margin-top: 22px;
  font-size: 0.82rem;
  color: var(--muted-dim);
}

.contact-note::before {
  content: "↗ ";
  color: var(--accent-cyan);
}

/* ---------- Footer ---------- */

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

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 48px;
}

.brand-mark-footer img {
  height: 34px;
}

.footer-brand p {
  color: var(--muted);
  font-size: 0.9rem;
  margin-top: 16px;
  max-width: 320px;
}

.footer-slogan {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent-cyan);
  letter-spacing: 0.1em;
}

.site-footer h3 {
  font-size: 0.85rem;
  font-weight: 650;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text);
  margin-bottom: 18px;
}

.footer-nav,
.footer-business,
.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-nav a,
.footer-business a,
.footer-contact a,
.footer-contact span {
  color: var(--muted);
  font-size: 0.92rem;
  transition: color 0.25s var(--ease), transform 0.25s var(--ease);
  width: fit-content;
}

.footer-nav a:hover,
.footer-business a:hover,
.footer-contact a:hover {
  color: var(--text);
  transform: translateX(4px);
}

.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 20px 0;
}

.footer-bottom-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
}

.footer-bottom p,
.footer-bottom a {
  font-size: 0.82rem;
  color: var(--muted-dim);
}

.footer-bottom a:hover {
  color: var(--accent-cyan);
}

/* ---------- Reveal ---------- */

.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.85s var(--ease), transform 0.85s var(--ease);
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* ---------- Responsive ---------- */

@media (max-width: 1024px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .hero-orb {
    width: min(380px, 80%);
  }

  .bento-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .bento-large {
    grid-column: span 2;
    grid-row: auto;
  }

  .tech-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .contact-shell {
    grid-template-columns: 1fr;
  }

  .contact-panel {
    border-left: none;
    border-top: 1px solid var(--border);
  }

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

@media (max-width: 820px) {
  .site-nav {
    position: fixed;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    background: rgba(8, 8, 10, 0.96);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-bottom: 1px solid var(--border);
    padding: 16px 24px 24px;
    gap: 4px;
    transform: translateY(-16px);
    opacity: 0;
    pointer-events: none;
    transition: transform 0.35s var(--ease), opacity 0.35s var(--ease);
  }

  .site-nav.is-open {
    transform: none;
    opacity: 1;
    pointer-events: auto;
  }

  .nav-link {
    padding: 13px 14px;
    font-size: 1rem;
  }

  .nav-toggle {
    display: flex;
  }

  .header-cta {
    display: none;
  }

  .chain-strip {
    gap: 8px;
    padding: 14px 16px;
  }

  .chain-arrow {
    width: 16px;
  }

  .chain-head {
    width: 100%;
    justify-content: center;
  }
}

@media (max-width: 620px) {
  .section {
    padding: 64px 0;
  }

  .hero {
    padding-top: calc(var(--header-h) + 24px);
  }

  .hero-meta {
    grid-template-columns: 1fr;
    gap: 0;
  }

  .hero-meta > div {
    border-left: none;
    border-top: 1px solid var(--border-strong);
    padding: 10px 4px;
  }

  .hash-card-1 { right: 0; }
  .hash-card-2 { left: 0; }
  .hash-card-3 { display: none; }

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

  .bento-large,
  .bento-wide {
    grid-column: span 1;
  }

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

  .chain-flow .flow-arrow {
    display: none;
  }

  .chain-flow li {
    flex: 1 1 40%;
    max-width: none;
  }

  .contact-copy,
  .contact-panel {
    padding: 34px 26px;
  }

  .contact-grid-cards {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-bottom-inner {
    flex-direction: column;
    text-align: center;
    gap: 6px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}