/* Hero */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 4fr) minmax(215px, 1fr);
  min-height: 100svh;
  padding-top: var(--header-height);
  overflow: hidden;
  background: var(--paper);
}

.hero-grid {
  position: absolute;
  inset: var(--header-height) 0 0;
  pointer-events: none;
  opacity: 0.42;
  background-image:
    linear-gradient(to right, var(--line) 1px, transparent 1px),
    linear-gradient(to bottom, var(--line) 1px, transparent 1px);
  background-size: 10vw 100%, 100% 12.5vh;
  mask-image: linear-gradient(to bottom, transparent, black 14%, black 82%, transparent);
}

.hero-coordinate {
  position: absolute;
  z-index: 2;
  top: calc(var(--header-height) + 2rem);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.1em;
}

.hero-coordinate--left {
  left: var(--gutter);
}

.hero-coordinate--right {
  right: var(--gutter);
}

.hero-main {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: calc(100svh - var(--header-height));
  padding: clamp(6rem, 13vh, 9rem) clamp(2rem, 5vw, 5.5rem) 5.5rem var(--gutter);
  border-right: 1px solid var(--line);
}

.hero-kicker {
  position: absolute;
  top: clamp(6rem, 11vh, 8.5rem);
  left: var(--gutter);
  font-family: var(--font-mono);
  font-size: 0.64rem;
  font-weight: 500;
  letter-spacing: 0.14em;
}

.hero-name {
  position: relative;
  left: -0.035em;
  display: flex;
  align-items: baseline;
  color: var(--ink);
  font-family: var(--font-display-zh);
  font-size: clamp(8.5rem, 20vw, 22rem);
  font-weight: 400;
  letter-spacing: -0.14em;
  line-height: 0.78;
  white-space: nowrap;
}

.hero-name span {
  display: inline-block;
  opacity: 0;
  transform: translateY(0.28em) rotate(1.2deg);
  transition: opacity 900ms cubic-bezier(0.22, 1, 0.36, 1), transform 1100ms cubic-bezier(0.16, 1, 0.3, 1);
}

.page-ready .hero-name span {
  opacity: 1;
  transform: translateY(0) rotate(0);
}

.page-ready .hero-name span:nth-child(2) {
  transition-delay: 100ms;
}

.page-ready .hero-name span:nth-child(3) {
  transition-delay: 200ms;
}

.hero-identity {
  display: grid;
  grid-template-columns: minmax(260px, 0.9fr) minmax(300px, 1fr);
  gap: clamp(2rem, 7vw, 8rem);
  align-items: end;
  margin-top: clamp(2.5rem, 7vh, 5.5rem);
  padding-top: 1.25rem;
  border-top: 1px solid var(--line-strong);
}

.hero-name-en {
  font-family: var(--font-display-en);
  font-size: clamp(1.8rem, 3vw, 3.4rem);
  font-weight: 300;
  letter-spacing: -0.04em;
  line-height: 1;
}

.hero-name-en i {
  color: var(--terracotta);
  font-weight: 300;
}

.hero-statement {
  font-family: var(--font-display-zh);
  font-size: clamp(1.35rem, 2.1vw, 2.35rem);
  line-height: 1.48;
}

.hero-cta {
  display: flex;
  gap: 2rem;
  margin-top: 2.5rem;
}

.hero-rail {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-rows: repeat(3, 1fr) auto;
  min-height: calc(100svh - var(--header-height));
  padding-top: 5rem;
}

.rail-item {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.35rem;
  padding: 1.5rem clamp(1.25rem, 2.4vw, 2.6rem);
  border-bottom: 1px solid var(--line);
}

.rail-item strong {
  font-size: clamp(0.9rem, 1.1vw, 1.1rem);
  font-weight: 600;
}

.rail-item > span:not(.rail-label):not(.status-dot) {
  color: var(--muted);
  font-size: 0.8rem;
}

.rail-label {
  margin-bottom: 0.65rem;
  color: var(--terracotta-deep);
  font-family: var(--font-mono);
  font-size: 0.61rem;
  font-weight: 600;
  letter-spacing: 0.1em;
}

.rail-item--status {
  flex-direction: row;
  align-items: center;
  justify-content: flex-start;
  min-height: 74px;
  border-bottom: 0;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.08em;
}

.status-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--verified);
  box-shadow: 0 0 0 5px color-mix(in oklch, var(--verified) 16%, transparent);
}

.hero-foot {
  position: absolute;
  left: var(--gutter);
  right: calc(20% + var(--gutter));
  bottom: 1.4rem;
  z-index: 2;
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.1em;
}

/* Interests */
.interests {
  padding: var(--section-space) 0;
}

.interests-layout {
  display: grid;
  grid-template-columns: minmax(360px, 0.92fr) minmax(0, 1.45fr);
  gap: clamp(3rem, 8vw, 9rem);
  align-items: start;
  margin-top: clamp(4rem, 9vw, 8rem);
}

.portrait-panel {
  position: sticky;
  top: calc(var(--header-height) + 2rem);
  border: 1px solid var(--line-strong);
  background: var(--paper);
}

.portrait-panel::before,
.portrait-panel::after {
  position: absolute;
  z-index: 2;
  width: 18px;
  height: 18px;
  content: "";
  pointer-events: none;
}

.portrait-panel::before {
  top: -1px;
  left: -1px;
  border-top: 2px solid var(--terracotta);
  border-left: 2px solid var(--terracotta);
}

.portrait-panel::after {
  right: -1px;
  bottom: -1px;
  border-right: 2px solid var(--terracotta);
  border-bottom: 2px solid var(--terracotta);
}

.portrait-panel img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
}

.portrait-panel figcaption {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.85rem 1rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.59rem;
  letter-spacing: 0.07em;
}

.interest-index {
  border-top: 1px solid var(--line-strong);
}

.interest-item {
  display: grid;
  grid-template-columns: 4.5rem minmax(160px, 0.8fr) minmax(240px, 1.25fr);
  gap: clamp(1.25rem, 3vw, 3.75rem);
  align-items: start;
  padding: clamp(1.6rem, 3vw, 2.8rem) 0;
  border-bottom: 1px solid var(--line);
  transition: padding-left 220ms ease, color 220ms ease;
}

.interest-item:hover {
  padding-left: 0.75rem;
  color: var(--terracotta-deep);
}

.interest-item__index,
.interest-item__label {
  font-family: var(--font-mono);
  font-size: 0.64rem;
  letter-spacing: 0.08em;
}

.interest-item h3 {
  font-family: var(--font-display-zh);
  font-size: clamp(1.55rem, 2.4vw, 2.75rem);
  font-weight: 400;
  line-height: 1.25;
}

.interest-item__label {
  display: block;
  margin-top: 0.65rem;
  color: var(--muted);
}

.interest-item p {
  color: var(--ink-soft);
  font-size: clamp(0.93rem, 1.05vw, 1.05rem);
}

/* Stack */
.stack {
  padding: var(--section-space) 0 clamp(5rem, 9vw, 8rem);
  overflow: hidden;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.stack-heading {
  margin-bottom: clamp(4rem, 8vw, 7rem);
}

.stack-legend {
  display: flex;
  flex-wrap: wrap;
  gap: 1.4rem 2.5rem;
  margin-top: 3rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.06em;
}

.stack-legend span {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
}

.legend-dot {
  width: 7px;
  height: 7px;
  border: 1px solid var(--ink);
  border-radius: 50%;
}

.legend-dot--core {
  background: var(--terracotta);
  border-color: var(--terracotta);
}

.legend-dot--used {
  background: var(--ink);
}

.legend-dot--learning {
  background: transparent;
  border-style: dashed;
}

.marquee-system {
  border-bottom: 1px solid var(--line-strong);
}

.marquee-row {
  position: relative;
  min-height: 96px;
  overflow: hidden;
  border-top: 1px solid var(--line-strong);
}

.marquee-row::before,
.marquee-row::after {
  position: absolute;
  top: 0;
  bottom: 0;
  z-index: 5;
  width: clamp(2rem, 5vw, 5rem);
  content: "";
  pointer-events: none;
}

.marquee-row::before {
  left: 0;
  background: linear-gradient(to right, var(--paper), transparent);
}

.marquee-row::after {
  right: 0;
  background: linear-gradient(to left, var(--paper), transparent);
}

.marquee-row__label {
  position: absolute;
  top: 0.55rem;
  left: var(--gutter);
  z-index: 6;
  padding: 0.15rem 0.35rem;
  color: var(--paper);
  background: var(--ink);
  font-family: var(--font-mono);
  font-size: 0.52rem;
  letter-spacing: 0.08em;
}

.marquee-track {
  display: flex;
  width: max-content;
  min-width: 100%;
  will-change: transform;
  animation-name: marquee-forward;
  animation-duration: var(--marquee-speed, 42s);
  animation-timing-function: linear;
  animation-iteration-count: infinite;
}

.marquee-row[data-direction="reverse"] .marquee-track {
  animation-name: marquee-reverse;
}

.marquee-row:hover .marquee-track,
.marquee-row:focus-within .marquee-track {
  animation-play-state: paused;
}

.marquee-group {
  display: flex;
  flex-shrink: 0;
}

.tech-item {
  display: grid;
  grid-template-columns: 46px auto;
  grid-template-rows: auto auto;
  column-gap: 1rem;
  align-items: center;
  min-width: 200px;
  padding: 1.15rem 2rem;
  border-left: 1px solid var(--line);
}

.tech-item__icon {
  display: grid;
  grid-row: 1 / 3;
  place-items: center;
  width: 46px;
  height: 46px;
  border: 1px solid var(--line);
  background: var(--paper-alt);
}

.tech-item img {
  width: 27px;
  height: 27px;
  object-fit: contain;
}

.tech-item strong {
  align-self: end;
  font-size: 0.95rem;
  line-height: 1.2;
  white-space: nowrap;
}

.tech-item small {
  align-self: start;
  margin-top: 0.2rem;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.53rem;
  letter-spacing: 0.09em;
}

.tech-item[data-level="CORE"] small {
  color: var(--terracotta-deep);
}

.stack-foot {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-top: 2rem;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.58rem;
  letter-spacing: 0.08em;
}

@keyframes marquee-forward {
  to { transform: translateX(-50%); }
}

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

/* Direction */
.direction {
  padding: var(--section-space) 0;
  overflow: hidden;
}

.direction::before {
  position: absolute;
  inset: 0;
  content: "";
  opacity: 0.16;
  background-image:
    linear-gradient(var(--paper-line) 1px, transparent 1px),
    linear-gradient(90deg, var(--paper-line) 1px, transparent 1px);
  background-size: 86px 86px;
  mask-image: radial-gradient(circle at 70% 44%, black, transparent 68%);
}

.direction .section-frame {
  position: relative;
}

.direction-heading h2 {
  font-family: var(--font-display-en), var(--font-display-zh);
  font-size: clamp(3.4rem, 7.8vw, 8rem);
  letter-spacing: -0.055em;
}

.direction-heading h2 i {
  color: var(--terracotta);
  font-weight: 300;
}

.roadmap-shell {
  margin-top: clamp(5rem, 9vw, 9rem);
  border-top: 1px solid var(--paper-line);
}

.roadmap-track {
  position: relative;
  display: grid;
  grid-template-columns: repeat(5, 1fr);
}

.roadmap-track::before {
  position: absolute;
  top: 2.7rem;
  left: 0;
  right: 0;
  height: 1px;
  content: "";
  background: var(--paper-line);
}

.roadmap-node {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  min-height: 185px;
  padding: 1rem 1.4rem 1.5rem 0;
  border: 0;
  border-right: 1px solid var(--paper-line);
  color: var(--paper-muted);
  background: transparent;
  text-align: left;
  cursor: pointer;
}

.roadmap-node:last-child {
  border-right: 0;
}

.roadmap-node::before {
  position: relative;
  z-index: 2;
  width: 10px;
  height: 10px;
  margin: 1.4rem 0 2rem;
  border: 1px solid var(--paper);
  border-radius: 50%;
  content: "";
  background: var(--ink);
  transition: transform 180ms ease, background 180ms ease;
}

.roadmap-node:hover::before,
.roadmap-node.is-active::before {
  background: var(--terracotta);
  border-color: var(--terracotta);
  transform: scale(1.45);
}

.roadmap-node__date {
  color: var(--paper-muted);
  font-family: var(--font-mono);
  font-size: 0.6rem;
  letter-spacing: 0.07em;
}

.roadmap-node strong {
  margin-top: 0.5rem;
  color: var(--paper);
  font-family: var(--font-display-zh);
  font-size: clamp(1.15rem, 1.7vw, 1.8rem);
  font-weight: 400;
}

.roadmap-node small {
  margin-top: auto;
  font-family: var(--font-mono);
  font-size: 0.55rem;
  letter-spacing: 0.04em;
}

.roadmap-node.is-active small {
  color: var(--terracotta);
}

.roadmap-detail {
  display: grid;
  grid-template-columns: minmax(120px, 0.65fr) minmax(300px, 2.2fr) minmax(190px, 1fr);
  gap: clamp(2rem, 5vw, 6rem);
  align-items: start;
  min-height: 240px;
  padding: clamp(2rem, 4vw, 4rem) 0;
  border-top: 1px solid var(--paper-line);
  border-bottom: 1px solid var(--paper-line);
}

.roadmap-detail__date,
.roadmap-detail__label {
  color: var(--terracotta);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.08em;
}

.roadmap-detail h3 {
  margin: 0.55rem 0 1rem;
  font-family: var(--font-display-zh);
  font-size: clamp(2rem, 3.5vw, 4rem);
  font-weight: 400;
}

.roadmap-detail p:not(.roadmap-detail__label) {
  max-width: 48rem;
  color: var(--paper-muted);
}

.roadmap-detail > strong {
  align-self: end;
  padding-top: 1rem;
  border-top: 1px solid var(--paper-line);
  color: var(--paper);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 500;
  letter-spacing: 0.06em;
}

.decision-note {
  display: grid;
  grid-template-columns: 1fr 2.5fr;
  gap: clamp(2rem, 5vw, 6rem);
  margin-top: 2rem;
  padding: 1.25rem 0;
  border-bottom: 1px solid var(--paper-line);
}

.decision-note__index {
  color: var(--terracotta);
  font-family: var(--font-mono);
  font-size: 0.62rem;
  letter-spacing: 0.08em;
}

.decision-note p {
  max-width: 58rem;
  color: var(--paper-muted);
}