/* =========================================================
   v2 / S1 sections + specimen room
   ========================================================= */

/* ---------- nav links ---------- */
.nav-links {
  display: flex;
  align-items: center;
  gap: clamp(14px, 1.6vw, 26px);
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--muted);
  text-transform: uppercase;
}
.nav-links a { position: relative; padding: 4px 0; transition: color 0.25s ease; }
.nav-links a::after {
  content: "";
  position: absolute;
  left: 0;
  right: 100%;
  bottom: 0;
  height: 1px;
  background: var(--accent);
  transition: right 0.3s var(--ease);
}
.nav-links a:hover, .nav-links a:focus-visible { color: var(--ink); }
.nav-links a:hover::after, .nav-links a:focus-visible::after { right: 0; }

/* ---------- sections ---------- */
.section {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(84px, 10vh, 148px) var(--pad);
  border-top: 1px solid var(--line);
  scroll-margin-top: calc(var(--topbar-h) + 18px);
}
.section-head {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: clamp(24px, 4vw, 72px);
  align-items: end;
  margin-bottom: clamp(34px, 5vw, 64px);
}
.section-kicker {
  margin: 0 0 14px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.16em;
  color: var(--accent);
  text-transform: uppercase;
}
.section-head h2 {
  margin: 0;
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(34px, 4vw, 58px);
  line-height: 1.08;
  letter-spacing: -0.01em;
}
.section-lede {
  margin: 0;
  justify-self: end;
  max-width: 34em;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.9;
}

/* ---------- works ---------- */
.works-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(340px, 0.92fr);
  gap: clamp(28px, 4vw, 64px);
  align-items: start;
}
.works-list {
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid var(--line);
}
.work-row {
  position: relative;
  display: grid;
  grid-template-columns: 42px minmax(0, 1fr) auto;
  gap: 18px;
  padding: 20px 0 22px;
  border-bottom: 1px solid var(--line);
  transition: background-color 0.25s ease;
}
.work-row::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  bottom: -1px;
  width: 2px;
  background: var(--accent);
  transform: scaleY(0);
  transform-origin: top;
  transition: transform 0.3s var(--ease);
}
.work-row:hover, .work-row:focus-visible {
  background: linear-gradient(90deg, rgba(232, 92, 51, 0.055), transparent 62%);
}
.work-row:hover::before, .work-row:focus-visible::before, .work-row.active::before {
  transform: scaleY(1);
}
.work-no {
  padding-top: 3px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--accent);
}
.work-en {
  display: block;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--faint);
  text-transform: uppercase;
}
.work-title {
  display: block;
  margin: 4px 0 6px;
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(22px, 2.1vw, 30px);
  line-height: 1.2;
  color: var(--ink);
}
.work-summary {
  display: block;
  max-width: 38em;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.8;
}
.work-side {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 12px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--faint);
  white-space: nowrap;
  text-align: right;
}
.work-arrow { color: var(--accent); font-size: 16px; line-height: 1; }

.works-plate {
  position: sticky;
  top: calc(var(--topbar-h) + 28px);
}
.plate-frame {
  aspect-ratio: 1000 / 720;
  border: 1px solid var(--line);
  background: rgba(6, 10, 18, 0.35);
}
.plate-frame canvas { display: block; width: 100%; height: 100%; }
.plate-caption {
  margin: 10px 0 0;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--faint);
  text-align: right;
}

/* ---------- signal chain ---------- */
.signal-frame {
  aspect-ratio: 1000 / 260;
  border: 1px solid var(--line);
  background: rgba(6, 10, 18, 0.35);
}
.signal-frame canvas { display: block; width: 100%; height: 100%; }
.signal-steps-mobile { display: none; }
.signal-notes {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: clamp(20px, 3vw, 48px);
  margin-top: 26px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}
.signal-notes div { display: flex; flex-direction: column; gap: 4px; }
.signal-notes dt {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--faint);
}
.signal-notes dd { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.8; }

/* ---------- method ---------- */
.method-body {
  display: grid;
  grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr);
  gap: clamp(28px, 4vw, 64px);
}
.method-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border-top: 1px solid var(--line);
}
.method-item { padding: 24px 24px 26px 0; border-bottom: 1px solid var(--line); }
.method-item:nth-child(odd) { border-right: 1px solid var(--line); padding-right: 30px; }
.method-item:nth-child(even) { padding-left: 30px; }
.method-item h3 {
  margin: 0 0 10px;
  font-family: var(--serif);
  font-weight: 500;
  font-size: 23px;
  line-height: 1.2;
}
.method-item p { margin: 0; color: var(--muted); font-size: 14px; line-height: 1.85; }
.tools { border-top: 1px solid var(--line); padding-top: 20px; }
.tools h3 {
  margin: 0 0 14px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--faint);
  text-transform: uppercase;
}
.tools-grid { display: flex; flex-wrap: wrap; gap: 8px; }
.tools-grid span {
  border: 1px solid var(--line);
  padding: 6px 9px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
  line-height: 1.5;
}
.tools-note {
  margin: 20px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  color: var(--faint);
  font-size: 13px;
  line-height: 1.8;
}

/* ---------- family ---------- */
.master-row {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 26px;
  padding: 18px 0 22px;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.master-mark {
  width: 36px;
  height: 36px;
  flex: none;
  display: grid;
  place-items: center;
  border: 1px solid var(--accent);
  color: var(--accent);
  font-family: var(--mono);
  font-size: 12px;
}
.master-row b { display: block; font-weight: 500; font-size: 16px; }
.master-row p { margin: 4px 0 0; color: var(--muted); font-size: 14px; line-height: 1.8; }
.family-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  border-top: 1px solid var(--line);
}
.family-card {
  padding: 22px 20px 26px;
  border-right: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.family-card:last-child { border-right: 0; }
.family-seal {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  margin-bottom: 14px;
  border: 1px solid var(--seat, var(--accent));
  color: var(--seat, var(--accent));
  font-family: var(--serif);
  font-size: 17px;
  line-height: 1;
}
.family-name { margin: 0; font-family: var(--serif); font-size: 20px; font-weight: 500; }
.family-role {
  margin: 4px 0 10px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--faint);
}
.family-note { margin: 0; color: var(--muted); font-size: 13.5px; line-height: 1.8; }

/* ---------- IP / honours ---------- */
.ip-body {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(28px, 4vw, 64px);
}
.ip-col h3 {
  margin: 0 0 12px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.12em;
  color: var(--faint);
  text-transform: uppercase;
}
.ip-list { list-style: none; margin: 0; padding: 0; border-top: 1px solid var(--line); }
.ip-list li {
  display: grid;
  grid-template-columns: 110px minmax(0, 1fr);
  gap: 6px 14px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
  align-items: baseline;
}
.ip-list span { font-family: var(--mono); font-size: 11px; color: var(--accent); }
.ip-list b { font-weight: 500; font-size: 15px; color: var(--ink); }
.ip-list em { grid-column: 2; font-style: normal; font-size: 13px; line-height: 1.7; color: var(--muted); }

/* ---------- contact ---------- */
.contact {
  max-width: var(--max);
  margin: 0 auto;
  padding: clamp(84px, 10vh, 148px) var(--pad) clamp(64px, 8vh, 110px);
  border-top: 1px solid var(--line);
  scroll-margin-top: calc(var(--topbar-h) + 18px);
}
.contact h2 {
  margin: 0 0 26px;
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(46px, 6vw, 92px);
  line-height: 1;
  letter-spacing: -0.02em;
}
.contact-links {
  display: flex;
  flex-wrap: wrap;
  gap: 28px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.04em;
}
.contact-links a { padding-bottom: 4px; border-bottom: 1px solid var(--line-strong); transition: border-color 0.25s ease, color 0.25s ease; }
.contact-links a:hover { color: var(--accent); border-color: var(--accent); }
.contact-note { margin: 20px 0 0; font-family: var(--mono); font-size: 11px; color: var(--faint); }

/* ---------- room ---------- */
body.room-open { overflow: hidden; }
.room {
  position: fixed;
  inset: 0;
  z-index: 80;
  display: grid;
  place-items: center;
}
.room-scrim {
  position: absolute;
  inset: 0;
  background: rgba(3, 6, 10, 0.86);
  backdrop-filter: blur(9px);
}
.room-panel {
  position: relative;
  display: grid;
  grid-template-columns: minmax(340px, 0.4fr) minmax(0, 0.6fr);
  width: min(1480px, calc(100vw - 48px));
  height: min(860px, calc(100dvh - 48px));
  border: 1px solid var(--line-strong);
  background: var(--bg);
  box-shadow: var(--shadow);
}
.room-close {
  position: absolute;
  top: 12px;
  right: 12px;
  z-index: 5;
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border: 1px solid var(--line);
  background: rgba(6, 10, 18, 0.78);
  color: var(--ink);
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
  transition: border-color 0.25s ease, color 0.25s ease;
}
.room-close:hover { border-color: var(--accent); color: var(--accent); }
.room-copy {
  min-height: 0;
  overflow: auto;
  padding: clamp(28px, 3vw, 48px);
  border-right: 1px solid var(--line);
}
.room-kicker {
  margin: 0 0 14px;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.14em;
  color: var(--accent);
  text-transform: uppercase;
}
.room-copy h2 {
  margin: 0 0 18px;
  font-family: var(--serif);
  font-weight: 500;
  font-size: clamp(34px, 3.4vw, 54px);
  line-height: 1.06;
  letter-spacing: -0.02em;
}
.room-summary { margin: 0; color: var(--muted); font-size: 15px; line-height: 1.9; }
.room-points {
  list-style: none;
  margin: 24px 0;
  padding: 0;
  border-top: 1px solid var(--line);
}
.room-points li {
  display: flex;
  gap: 10px;
  padding: 11px 0;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
  line-height: 1.75;
}
.room-points li::before { content: "—"; color: var(--accent); flex: none; }
.room-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.room-tags span {
  border: 1px solid var(--line);
  padding: 5px 8px;
  font-family: var(--mono);
  font-size: 11px;
  color: var(--muted);
}
.room-meta {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px 18px;
  margin: 24px 0 0;
  padding-top: 16px;
  border-top: 1px solid var(--line);
}
.room-meta dt { font-family: var(--mono); font-size: 11px; letter-spacing: 0.08em; color: var(--faint); }
.room-meta dd { margin: 0; font-size: 13px; line-height: 1.6; }
.room-evidence a { color: var(--ink); border-bottom: 1px solid var(--line-strong); }
.room-evidence a:hover { color: var(--accent); border-color: var(--accent); }
.room-evidence {
  margin: 18px 0 0;
  padding-top: 14px;
  border-top: 1px solid var(--line);
  font-family: var(--mono);
  font-size: 11px;
  line-height: 1.8;
  color: var(--faint);
}
.room-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 24px; }
.room-visual {
  position: relative;
  min-height: 0;
  overflow: hidden;
  background:
    radial-gradient(700px 520px at 62% 38%, rgba(232, 92, 51, 0.08), transparent 60%),
    var(--bg);
}
.room-visual canvas { position: absolute; inset: 0; display: block; width: 100%; height: 100%; touch-action: none; cursor: grab; }
.room-visual canvas:active { cursor: grabbing; }
.room-badge {
  position: absolute;
  top: 16px;
  left: 18px;
  z-index: 4;
  margin: 0;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--accent);
  text-shadow: 0 1px 6px var(--bg);
}
.room-hint {
  position: absolute;
  left: 18px;
  bottom: 16px;
  z-index: 4;
  margin: 0;
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: 0.08em;
  color: var(--faint);
  text-shadow: 0 1px 6px var(--bg);
}

/* ---------- responsive ---------- */
@media (max-width: 1080px) {
  .nav-links { gap: 14px; }
  .works-layout { grid-template-columns: minmax(0, 1.1fr) minmax(300px, 0.9fr); }
  .family-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
  .family-card { border-right: 1px solid var(--line); }
  .family-card:nth-child(3n) { border-right: 0; }
}

@media (max-width: 1020px) {
  .nav-links { display: none; }
}

@media (max-width: 900px) {
  .section { padding: 64px var(--pad); }
  .section-head { grid-template-columns: 1fr; gap: 14px; margin-bottom: 30px; }
  .section-lede { justify-self: start; }
  .section-head h2 { font-size: clamp(32px, 9vw, 44px); }
  .works-layout { grid-template-columns: 1fr; }
  .works-plate { display: none; }
  .work-row { grid-template-columns: 34px minmax(0, 1fr); gap: 12px; }
  .work-side { grid-column: 2; flex-direction: row; align-items: center; justify-content: space-between; }
  .work-summary { font-size: 13.5px; }
  .signal-frame { display: none; }
  .signal-steps-mobile {
    display: grid;
    margin: 0;
    padding: 0;
    list-style: none;
    border-top: 1px solid var(--line);
  }
  .signal-steps-mobile li {
    display: grid;
    grid-template-columns: 34px 1fr auto;
    align-items: baseline;
    gap: 12px;
    padding: 12px 0;
    border-bottom: 1px solid var(--line);
  }
  .signal-steps-mobile span { font-family: var(--mono); font-size: 11px; color: var(--accent); }
  .signal-steps-mobile b { font-weight: 500; font-size: 15px; }
  .signal-steps-mobile em {
    font-family: var(--mono);
    font-size: 11px;
    font-style: normal;
    color: var(--faint);
    text-align: right;
  }
  .signal-notes { grid-template-columns: 1fr; gap: 12px; margin-top: 22px; }
  .method-body { grid-template-columns: 1fr; }
  .method-grid { grid-template-columns: 1fr; }
  .method-item:nth-child(odd) { border-right: 0; padding-right: 0; }
  .method-item:nth-child(even) { padding-left: 0; }
  .family-grid { grid-template-columns: 1fr; }
  .family-card, .family-card:nth-child(3n) { border-right: 0; }
  .ip-body { grid-template-columns: 1fr; }
  .contact-links { flex-direction: column; gap: 14px; }
  .room-panel {
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    width: calc(100vw - 16px);
    height: calc(100dvh - 16px);
  }
  .room-copy { order: 2; overflow: visible; border-right: 0; border-top: 1px solid var(--line); padding: 22px var(--pad) 24px; }
  .room-copy h2 { font-size: 32px; }
  .room-visual { order: 1; flex: none; height: 46vh; min-height: 300px; }
  .room--2d .room-visual { display: none; }
  .room--2d .room-copy { order: 1; border-top: 0; }
  .room--2d .room-actions { display: none; }
  .room--2d .room-copy::before {
    content: "SIMULATED · 演示非实测";
    display: block;
    margin-bottom: 14px;
    font-family: var(--mono);
    font-size: 11px;
    letter-spacing: 0.1em;
    color: var(--accent);
  }
  .room-visual.room-pan { overflow-x: auto; overflow-y: hidden; }
  .room-visual.room-pan canvas { position: static; width: max(100%, 520px); height: 100%; }
  .room-close { position: fixed; top: 20px; right: 20px; width: 38px; height: 38px; }
}

@media (max-width: 420px) {
  .work-title { font-size: 23px; }
  .master-row { gap: 12px; }
  .family-card { padding: 18px 16px 20px; }
}