/* X1 · Corporate site */
:root {
  --ink: #0c1222;
  --ink-soft: #1a2332;
  --paper: #f5f6f8;
  --paper-2: #eceef2;
  --line: rgba(12, 18, 34, 0.1);
  --line-strong: rgba(12, 18, 34, 0.16);
  --mute: #5f6b7a;
  --mute-2: #8b95a3;
  --accent: #0d6e6e;
  --accent-2: #0a5555;
  --hero: #0b1220;
  --font-display: "Syne", "Noto Sans SC", sans-serif;
  --font-body: "IBM Plex Sans", "Noto Sans SC", sans-serif;
  --pad: clamp(1.25rem, 4vw, 3.5rem);
  --max: 1120px;
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  color: var(--ink);
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  background: var(--paper);
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }

.site-header {
  position: fixed;
  inset: 0 0 auto;
  z-index: 50;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 0.95rem var(--pad);
  transition: background .3s ease, border-color .3s ease;
  border-bottom: 1px solid transparent;
  background: rgba(245, 246, 248, 0.96);
  backdrop-filter: blur(12px);
}
.site-header.is-scrolled {
  border-bottom-color: var(--line);
}
.site-header.on-hero:not(.is-scrolled) {
  background: transparent;
  backdrop-filter: none;
}
.site-header.on-hero:not(.is-scrolled) .brand,
.site-header.on-hero:not(.is-scrolled) .nav-link { color: rgba(245, 246, 248, 0.88); }
.site-header.on-hero:not(.is-scrolled) .nav-link:hover { color: #fff; }
.site-header.on-hero:not(.is-scrolled) .nav-link.is-active {
  color: #fff;
}
.site-header.on-hero:not(.is-scrolled) .nav-link.is-active::after {
  background: #5ec4c0;
}
.site-header.on-hero:not(.is-scrolled) .btn-secondary {
  border-color: rgba(245, 246, 248, 0.35);
  color: #f5f6f8;
}
.site-header.on-hero:not(.is-scrolled) .btn-primary {
  background: #f5f6f8;
  color: var(--ink);
}
.site-header.on-hero:not(.is-scrolled) .nav-toggle { border-color: rgba(245, 246, 248, 0.35); }
.site-header.on-hero:not(.is-scrolled) .nav-toggle span { background: #f5f6f8; }

.brand {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.55rem;
  letter-spacing: 0.04em;
}

.nav {
  display: flex;
  align-items: center;
  gap: clamp(1rem, 2.2vw, 1.65rem);
}
.nav-link {
  position: relative;
  font-size: 1.05rem;
  font-weight: 500;
  color: var(--mute);
  padding: 0.2rem 0;
  transition: color .2s ease;
}
.nav-link:hover { color: var(--ink); }
.nav-link.is-active {
  color: var(--accent);
  font-weight: 700;
}
.nav-link.is-active::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -0.3rem;
  height: 2px;
  background: var(--accent);
  border-radius: 1px;
}

.nav-toggle {
  display: none;
  width: 2.6rem;
  height: 2.6rem;
  border: 1px solid var(--line-strong);
  background: transparent;
  cursor: pointer;
  padding: 0;
}
.nav-toggle span {
  display: block;
  width: 1rem;
  height: 1.5px;
  margin: 5px auto;
  background: var(--ink);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.7rem;
  padding: 0 1.25rem;
  font-size: 0.9rem;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background .2s ease, border-color .2s ease, color .2s ease;
}
.btn-primary { background: var(--ink); color: #f5f6f8; }
.btn-primary:hover { background: #182033; }
.btn-secondary {
  background: transparent;
  border-color: var(--line-strong);
  color: var(--ink);
}
.btn-secondary:hover { border-color: var(--ink); }
.btn-accent {
  background: var(--accent);
  color: #fff;
  border: 0;
}
.btn-accent:hover { background: var(--accent-2); }

/* Hero */
.hero {
  position: relative;
  min-height: 100vh;
  min-height: 100dvh;
  display: grid;
  align-items: end;
  overflow: hidden;
  color: #eef1f5;
  background: var(--hero);
}
.hero-particles {
  position: absolute;
  inset: 0;
  z-index: 0;
}
.hero-particles canvas {
  display: block !important;
  width: 100% !important;
  height: 100% !important;
}
.hero-stage {
  position: absolute;
  inset: 0;
  z-index: 1;
  background:
    radial-gradient(ellipse 55% 45% at 78% 40%, rgba(13, 110, 110, 0.2), transparent 60%),
    radial-gradient(ellipse 40% 35% at 20% 80%, rgba(61, 126, 166, 0.12), transparent 55%),
    linear-gradient(160deg, #0b1220 0%, #101a2b 55%, #0d1524 100%);
  pointer-events: none;
}
.hero-stage::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(238, 241, 245, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(238, 241, 245, 0.035) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: linear-gradient(90deg, transparent, #000 42%);
  opacity: 0.75;
  animation: gridDrift 36s linear infinite;
}
.hero-rings {
  position: absolute;
  right: -10%;
  top: 6%;
  width: min(58vw, 680px);
  aspect-ratio: 1;
  border-radius: 50%;
  border: 1px solid rgba(94, 196, 192, 0.14);
  animation: ringSpin 50s linear infinite;
}
.hero-rings::before,
.hero-rings::after {
  content: "";
  position: absolute;
  inset: 14%;
  border-radius: 50%;
  border: 1px solid rgba(61, 126, 166, 0.16);
}
.hero-rings::after {
  inset: 28%;
  border-style: dashed;
  animation: ringSpin 30s linear infinite reverse;
}
.hero-scan {
  position: absolute;
  left: 0;
  right: 0;
  height: 16%;
  top: -18%;
  background: linear-gradient(180deg, transparent, rgba(94, 196, 192, 0.07), transparent);
  animation: scanSweep 8s ease-in-out infinite;
}
.hero-ui {
  position: absolute;
  inset: 16% 5% 22% 48%;
  z-index: 2;
  border: 1px solid rgba(238, 241, 245, 0.14);
  background: rgba(10, 16, 28, 0.72);
  backdrop-filter: blur(6px);
  display: grid;
  grid-template-columns: 68px 1fr;
  overflow: hidden;
  opacity: 0;
  transform: perspective(1400px) rotateY(-7deg) rotateX(3deg);
  transform-origin: 70% 50%;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
  transition: opacity .6s ease;
}
.hero-ui.is-shown { opacity: 1; }
.hero-ui-rail {
  border-right: 1px solid rgba(238, 241, 245, 0.08);
  padding: 1rem 0.6rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.hero-ui-rail i {
  display: block;
  height: 8px;
  background: rgba(238, 241, 245, 0.12);
  opacity: 0;
}
.hero-ui-rail i:first-child {
  background: linear-gradient(90deg, var(--accent), #5ec4c0);
  box-shadow: 0 0 10px rgba(13, 110, 110, 0.45);
}
.hero-ui-main {
  padding: 1rem 1.1rem;
  display: grid;
  grid-template-rows: auto 1fr;
  gap: 0.85rem;
}
.hero-ui-bar {
  display: flex;
  gap: 0.4rem;
  opacity: 0;
}
.hero-ui-bar b {
  display: block;
  height: 7px;
  background: rgba(238, 241, 245, 0.14);
}
.hero-ui-bar b:nth-child(1) { width: 26%; background: rgba(13, 110, 110, 0.55); }
.hero-ui-bar b:nth-child(2) { width: 12%; }
.hero-ui-bar b:nth-child(3) { width: 16%; }
.hero-ui-canvas {
  position: relative;
  border: 1px solid rgba(238, 241, 245, 0.08);
  background:
    repeating-linear-gradient(90deg, rgba(238, 241, 245, 0.03) 0 1px, transparent 1px 40px),
    repeating-linear-gradient(0deg, rgba(238, 241, 245, 0.03) 0 1px, transparent 1px 40px);
  overflow: hidden;
}
.flow-svg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 1;
}
.flow-path {
  fill: none;
  stroke: rgba(94, 196, 192, 0.95);
  stroke-width: 0.55;
  stroke-linecap: round;
  vector-effect: non-scaling-stroke;
  stroke-dasharray: 48;
  stroke-dashoffset: 48;
  opacity: 0;
  filter: drop-shadow(0 0 3px rgba(13, 110, 110, 0.4));
}
.flow-node {
  position: absolute;
  z-index: 2;
  width: 26%;
  height: 17%;
  border: 1px solid rgba(238, 241, 245, 0.22);
  background: rgba(14, 22, 36, 0.95);
  opacity: 0;
  transform: scale(0.75);
}
.flow-node em {
  position: absolute;
  left: 28%;
  right: 12%;
  top: 32%;
  height: 2px;
  background: rgba(238, 241, 245, 0.2);
  box-shadow: 0 8px 0 rgba(238, 241, 245, 0.12);
  display: block;
}
.flow-node::before {
  content: "";
  position: absolute;
  left: 10%;
  top: 24%;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px rgba(94, 196, 192, 0.7);
}
.flow-node.n1 { left: 8%; top: 14%; border-color: rgba(94, 196, 192, 0.55); }
.flow-node.n2 { left: 40%; top: 40%; }
.flow-node.n3 { left: 66%; top: 18%; border-color: rgba(61, 126, 166, 0.55); }
.flow-node.n3::before { background: #3d7ea6; box-shadow: 0 0 8px rgba(61, 126, 166, 0.7); }
.flow-node.n4 { left: 50%; top: 66%; width: 36%; }
.build-cursor {
  position: absolute;
  z-index: 4;
  width: 12px;
  height: 12px;
  margin: -6px 0 0 -6px;
  border: 2px solid #5ec4c0;
  border-radius: 50%;
  box-shadow: 0 0 12px rgba(94, 196, 192, 0.7);
  opacity: 0;
  left: 18%;
  top: 22%;
  pointer-events: none;
}
.build-cursor::after {
  content: "";
  position: absolute;
  inset: 2px;
  border-radius: 50%;
  background: #5ec4c0;
}
.build-status {
  position: absolute;
  z-index: 3;
  left: 0.65rem;
  bottom: 0.5rem;
  font-size: 0.7rem;
  letter-spacing: 0.08em;
  color: rgba(180, 190, 204, 0.8);
  opacity: 0;
}
.build-status::after { content: "流程编排中"; }
.hero-ui.is-shown .hero-ui-rail i:nth-child(1) { animation: fadeInSoft 7s ease-in-out infinite; animation-delay: 0.1s; }
.hero-ui.is-shown .hero-ui-rail i:nth-child(2) { animation: fadeInSoft 7s ease-in-out infinite; animation-delay: 0.22s; }
.hero-ui.is-shown .hero-ui-rail i:nth-child(3) { animation: fadeInSoft 7s ease-in-out infinite; animation-delay: 0.34s; }
.hero-ui.is-shown .hero-ui-rail i:nth-child(4) { animation: fadeInSoft 7s ease-in-out infinite; animation-delay: 0.46s; }
.hero-ui.is-shown .hero-ui-rail i:nth-child(5) { animation: fadeInSoft 7s ease-in-out infinite; animation-delay: 0.58s; }
.hero-ui.is-shown .hero-ui-bar { animation: fadeInSoft 7s ease-in-out infinite; animation-delay: 0.7s; }
.hero-ui.is-shown .flow-node.n1 { animation: nodeIn 7s ease-in-out infinite; animation-delay: 1.0s; }
.hero-ui.is-shown .flow-node.n2 { animation: nodeIn 7s ease-in-out infinite; animation-delay: 1.9s; }
.hero-ui.is-shown .flow-node.n3 { animation: nodeIn 7s ease-in-out infinite; animation-delay: 2.8s; }
.hero-ui.is-shown .flow-node.n4 { animation: nodeIn 7s ease-in-out infinite; animation-delay: 3.7s; }
.hero-ui.is-shown .flow-path:nth-child(1) { animation: wireIn 7s ease-in-out infinite; animation-delay: 1.45s; }
.hero-ui.is-shown .flow-path:nth-child(2) { animation: wireIn 7s ease-in-out infinite; animation-delay: 2.35s; }
.hero-ui.is-shown .flow-path:nth-child(3) { animation: wireIn 7s ease-in-out infinite; animation-delay: 3.25s; }
.hero-ui.is-shown .build-cursor { animation: cursorMove 7s ease-in-out infinite; }
.hero-ui.is-shown .build-status { animation: statusIn 7s ease-in-out infinite; }
.hero-ui.is-shown .build-status::after { animation: statusText 7s ease-in-out infinite; }
@keyframes fadeInSoft {
  0%, 2% { opacity: 0; transform: translateY(6px); }
  10%, 78% { opacity: 1; transform: none; }
  88%, 100% { opacity: 0; }
}
@keyframes nodeIn {
  0%, 2% { opacity: 0; transform: scale(0.75); box-shadow: none; }
  12% { opacity: 1; transform: scale(1.05); box-shadow: 0 0 0 1px rgba(94, 196, 192, 0.35), 0 0 18px rgba(13, 110, 110, 0.25); }
  20%, 78% { opacity: 1; transform: scale(1); box-shadow: 0 0 0 1px rgba(94, 196, 192, 0.2); }
  88%, 100% { opacity: 0; transform: scale(0.8); }
}
@keyframes wireIn {
  0%, 2% { opacity: 0; stroke-dashoffset: 48; }
  10% { opacity: 1; }
  22%, 78% { opacity: 1; stroke-dashoffset: 0; }
  88%, 100% { opacity: 0; stroke-dashoffset: 48; }
}
@keyframes cursorMove {
  0%, 8% { opacity: 0; left: 18%; top: 22%; }
  12% { opacity: 1; left: 18%; top: 22%; }
  24% { opacity: 1; left: 52%; top: 48%; }
  38% { opacity: 1; left: 78%; top: 26%; }
  52% { opacity: 1; left: 68%; top: 74%; }
  62%, 100% { opacity: 0; left: 68%; top: 74%; }
}
@keyframes statusIn {
  0%, 6% { opacity: 0; }
  12%, 72% { opacity: 1; color: rgba(180, 190, 204, 0.8); }
  76%, 86% { opacity: 1; color: rgba(94, 196, 192, 0.95); }
  92%, 100% { opacity: 0; }
}
@keyframes statusText {
  0%, 74% { content: "流程编排中"; }
  76%, 88% { content: "已发布"; }
  90%, 100% { content: "流程编排中"; }
}
@keyframes gridDrift {
  from { background-position: 0 0, 0 0; }
  to { background-position: 72px 72px, 72px 72px; }
}
@keyframes ringSpin { to { transform: rotate(360deg); } }
@keyframes scanSweep {
  0% { top: -18%; opacity: 0; }
  12% { opacity: 1; }
  88% { opacity: 1; }
  100% { top: 110%; opacity: 0; }
}
.hero-shade {
  position: absolute;
  inset: 0;
  z-index: 3;
  background:
    linear-gradient(90deg, rgba(11, 18, 32, 0.94) 0%, rgba(11, 18, 32, 0.72) 38%, rgba(11, 18, 32, 0.2) 68%, rgba(11, 18, 32, 0.5) 100%),
    linear-gradient(180deg, rgba(11, 18, 32, 0.35) 0%, transparent 28%, rgba(11, 18, 32, 0.65) 100%);
  pointer-events: none;
}
.hero-content {
  position: relative;
  z-index: 4;
  width: min(100%, var(--max));
  margin: 0 auto;
  padding: 7.5rem var(--pad) 4.5rem;
}
.hero-brand {
  margin: 0 0 0.85rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(4rem, 12vw, 7.5rem);
  line-height: 0.88;
  letter-spacing: -0.04em;
}
.hero-title {
  margin: 0 0 0.9rem;
  max-width: 12em;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.5rem, 3vw, 2.15rem);
  line-height: 1.25;
  letter-spacing: -0.02em;
}
.hero-lead {
  margin: 0 0 1.75rem;
  max-width: 28rem;
  color: rgba(238, 241, 245, 0.68);
  font-size: 1.05rem;
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}
.hero-actions .btn-primary {
  background: #f5f6f8;
  color: var(--ink);
}
.hero-actions .btn-secondary {
  border-color: rgba(245, 246, 248, 0.32);
  color: #f5f6f8;
}
.hero-actions .btn-secondary:hover {
  border-color: #f5f6f8;
  background: rgba(245, 246, 248, 0.06);
}
.hero-note {
  margin-top: 2.25rem;
  padding-top: 1.15rem;
  border-top: 1px solid rgba(238, 241, 245, 0.12);
  max-width: 32rem;
  color: rgba(238, 241, 245, 0.5);
  font-size: 0.88rem;
}
[data-hero-in] {
  opacity: 0;
  transform: translateY(22px);
}
[data-hero-in].is-in {
  opacity: 1;
  transform: none;
  transition: opacity .7s ease, transform .7s ease;
}
/* Sections */
.section { padding: clamp(4rem, 9vh, 6.5rem) var(--pad); }
.section-inner { width: min(100%, var(--max)); margin: 0 auto; }
.section-label {
  margin: 0 0 0.65rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--accent);
}
.section-title {
  margin: 0 0 0.8rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.7rem, 3.2vw, 2.4rem);
  letter-spacing: -0.025em;
  line-height: 1.2;
}
.section-desc {
  margin: 0;
  max-width: 36rem;
  color: var(--mute);
  font-size: 1.02rem;
}
.section-head { margin-bottom: 2.25rem; }

.section-dark {
  background: var(--ink-soft);
  color: #eef1f5;
}
.section-dark .section-desc { color: rgba(238, 241, 245, 0.58); }
.section-dark .section-label { color: #5ec4c0; }
.section-muted {
  background: var(--paper-2);
  border-block: 1px solid var(--line);
}

.value-list { border-top: 1px solid var(--line-strong); }
.value-item {
  display: grid;
  grid-template-columns: 3.5rem 1fr;
  gap: 1rem 1.35rem;
  padding: 1.45rem 0;
  border-bottom: 1px solid var(--line);
}
.value-item .idx {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1rem;
  color: var(--accent);
}
.value-item h3 {
  margin: 0 0 0.35rem;
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
}
.value-item p {
  margin: 0;
  max-width: 42rem;
  color: var(--mute);
}

.arch-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: rgba(238, 241, 245, 0.12);
  border: 1px solid rgba(238, 241, 245, 0.12);
}
.arch-grid article {
  background: rgba(14, 22, 36, 0.95);
  padding: 1.45rem 1.25rem;
}
.arch-grid h3 {
  margin: 0 0 0.45rem;
  font-family: var(--font-display);
  font-size: 1.1rem;
}
.arch-grid p {
  margin: 0;
  color: rgba(238, 241, 245, 0.55);
  font-size: 0.94rem;
}

.stack { border-top: 1px solid var(--line-strong); }
.stack-item {
  display: grid;
  grid-template-columns: minmax(9rem, 16rem) 1fr;
  gap: 1rem 1.75rem;
  padding: 1.6rem 0;
  border-bottom: 1px solid var(--line);
}
.stack-item h2 {
  margin: 0;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.2rem;
}
.stack-item p {
  margin: 0;
  color: var(--mute);
  max-width: 40rem;
}

.scene-board {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1px;
  background: var(--line-strong);
  border: 1px solid var(--line-strong);
}
.scene-board article {
  background: var(--paper);
  padding: 1.55rem 1.35rem;
}
.section-muted .scene-board article { background: var(--paper-2); }
.scene-board h3 {
  margin: 0 0 0.45rem;
  font-family: var(--font-display);
  font-size: 1.12rem;
}
.scene-board p { margin: 0; color: var(--mute); }

.page-hero {
  padding: 7.5rem var(--pad) 3.25rem;
  background:
    radial-gradient(ellipse 70% 80% at 88% 20%, rgba(13, 110, 110, 0.18), transparent 55%),
    linear-gradient(165deg, #0b1220 0%, #121c2e 100%);
  color: #eef1f5;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}
.page-hero .brand-mark {
  margin: 0 0 0.6rem;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: clamp(2.4rem, 7vw, 3.8rem);
  letter-spacing: -0.03em;
  line-height: 0.95;
  color: #fff;
}
.page-hero h1 {
  margin: 0 0 0.75rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.55rem, 2.8vw, 2.1rem);
  color: #f5f6f8;
}
.page-hero .lead {
  margin: 0;
  max-width: 34rem;
  color: rgba(238, 241, 245, 0.72);
}

.cta-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1.5rem;
}

.site-footer {
  padding: 2.5rem var(--pad) 1.75rem;
  border-top: 1px solid var(--line);
}
.footer-row {
  width: min(100%, var(--max));
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 1rem 2rem;
}
.footer-brand {
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1.25rem;
}
.footer-brand span {
  display: block;
  margin-top: 0.3rem;
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 0.88rem;
  color: var(--mute);
}
.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem 1.2rem;
}
.footer-nav a { color: var(--mute); font-size: 0.9rem; }
.footer-nav a:hover { color: var(--ink); }
.footer-copy {
  width: min(100%, var(--max));
  margin: 1.5rem auto 0;
  padding-top: 1.1rem;
  border-top: 1px solid var(--line);
  color: var(--mute-2);
  font-size: 0.8rem;
}

[data-reveal] {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .55s ease, transform .55s ease;
}
[data-reveal].is-in {
  opacity: 1;
  transform: none;
}

@media (max-width: 960px) {
  .hero-ui { inset: 18% 5% 32% 30%; }
  .arch-grid { grid-template-columns: 1fr 1fr; }
  .stack-item { grid-template-columns: 1fr; gap: 0.4rem; }
}
@media (max-width: 760px) {
  .nav-toggle { display: block; }
  .nav {
    position: fixed;
    top: 4.2rem;
    left: var(--pad);
    right: var(--pad);
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0.35rem;
    padding: 0.85rem;
    background: rgba(245, 246, 248, 0.98);
    border: 1px solid var(--line-strong);
    z-index: 60;
  }
  .site-header.on-hero:not(.is-scrolled) .nav {
    background: rgba(11, 18, 32, 0.96);
    border-color: rgba(238, 241, 245, 0.12);
  }
  body.nav-open .nav { display: flex; }
  .nav .btn { width: 100%; }
  .hero-rings { opacity: 0.35; }
  .hero-ui {
    inset: auto 5% 8% 5%;
    height: 30%;
    transform: none;
    grid-template-columns: 52px 1fr;
  }
  .hero-shade {
    background: linear-gradient(180deg, rgba(11,18,32,0.2) 0%, rgba(11,18,32,0.55) 42%, rgba(11,18,32,0.94) 70%);
  }
  .arch-grid, .scene-board { grid-template-columns: 1fr; }
  .value-item { grid-template-columns: 2.8rem 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  [data-reveal], [data-hero-in] { opacity: 1; transform: none; transition: none; }
  .hero-ui.is-shown .hero-ui-rail i,
  .hero-ui.is-shown .hero-ui-bar,
  .hero-ui.is-shown .flow-node,
  .hero-ui.is-shown .flow-path,
  .hero-ui.is-shown .build-cursor,
  .hero-ui.is-shown .build-status {
    animation: none !important;
    opacity: 1 !important;
    transform: none !important;
    stroke-dashoffset: 0 !important;
  }
}

/* 维护提示 */
.maintain-tip {
  position: fixed;
  left: 50%;
  bottom: 2rem;
  z-index: 200;
  min-width: 16rem;
  max-width: calc(100vw - 2rem);
  padding: 0.95rem 1.2rem;
  border: 1px solid var(--line-strong);
  background: #fff;
  box-shadow: 0 12px 40px rgba(12, 18, 34, 0.14);
  transform: translate(-50%, 16px);
  opacity: 0;
  pointer-events: none;
  transition: opacity .25s ease, transform .25s ease;
}
.maintain-tip.is-show {
  opacity: 1;
  transform: translate(-50%, 0);
  pointer-events: auto;
}
.maintain-tip strong {
  display: block;
  margin-bottom: 0.25rem;
  font-size: 0.98rem;
  color: var(--ink);
}
.maintain-tip span {
  font-size: 0.88rem;
  color: var(--mute);
}