:root {
  color-scheme: light;
  --ink: #071827;
  --ink-soft: #243a4c;
  --muted: #647283;
  --paper: #f7fbfc;
  --surface: rgba(255, 255, 255, 0.72);
  --surface-strong: rgba(255, 255, 255, 0.9);
  --line: rgba(58, 92, 114, 0.18);
  --line-strong: rgba(20, 62, 88, 0.34);
  --cyan: #20d6e4;
  --teal: #0a6170;
  --blue: #143c78;
  --coral: #ff7b58;
  --violet: #6b7dff;
  --shadow: 0 24px 70px rgba(17, 49, 76, 0.16);
}

* {
  box-sizing: border-box;
  letter-spacing: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, "Noto Sans SC", "Microsoft YaHei", Arial, sans-serif;
  color: var(--ink);
  background:
    linear-gradient(122deg, rgba(32, 214, 228, 0.09) 0 18%, transparent 18% 100%),
    linear-gradient(238deg, rgba(255, 123, 88, 0.1) 0 16%, transparent 16% 100%),
    linear-gradient(180deg, #fbfeff 0%, #edf7fb 46%, #ffffff 100%);
  line-height: 1.72;
  overflow-x: hidden;
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background:
    repeating-linear-gradient(112deg, rgba(20, 60, 120, 0.055) 0 1px, transparent 1px 82px),
    repeating-linear-gradient(22deg, rgba(32, 214, 228, 0.05) 0 1px, transparent 1px 116px);
  mask-image: linear-gradient(180deg, rgba(0, 0, 0, 0.95), rgba(0, 0, 0, 0.2) 72%, transparent);
}

a {
  color: inherit;
}

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

.yunti-shell {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 14px min(4vw, 54px);
  background: rgba(255, 255, 255, 0.76);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(22px) saturate(1.28);
  -webkit-backdrop-filter: blur(22px) saturate(1.28);
}

.yunti-brand {
  display: flex;
  align-items: center;
  gap: 11px;
  min-width: 0;
  text-decoration: none;
}

.yunti-mark {
  position: relative;
  width: 36px;
  height: 36px;
  flex: 0 0 auto;
  border: 1px solid rgba(255, 255, 255, 0.9);
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.85), rgba(32, 214, 228, 0.26)),
    linear-gradient(145deg, var(--teal), var(--blue));
  box-shadow: 0 12px 32px rgba(10, 97, 112, 0.24);
  overflow: hidden;
}

.yunti-mark::before,
.yunti-mark::after {
  content: "";
  position: absolute;
  inset: 8px 10px;
  border-top: 2px solid rgba(255, 255, 255, 0.86);
  border-right: 2px solid rgba(255, 255, 255, 0.86);
  transform: skewY(-20deg);
}

.yunti-mark::after {
  inset: 15px 10px 8px 10px;
  border-color: rgba(255, 123, 88, 0.85);
  opacity: 0.9;
}

.yunti-brand strong {
  display: block;
  font-size: 18px;
  line-height: 1.1;
}

.yunti-brand small {
  display: block;
  color: var(--muted);
  font-size: 12px;
  white-space: nowrap;
}

.route-nav {
  display: flex;
  align-items: center;
  gap: 3px;
}

.route-nav a,
.fold-nav a {
  padding: 9px 11px;
  border: 1px solid transparent;
  border-radius: 8px;
  color: var(--ink-soft);
  text-decoration: none;
}

.route-nav a:hover {
  background: rgba(255, 255, 255, 0.72);
  border-color: var(--line);
  box-shadow: 0 8px 24px rgba(20, 60, 120, 0.08);
}

.fold-nav {
  display: none;
}

.desk-hero {
  position: relative;
  isolation: isolate;
  width: min(1240px, calc(100% - 36px));
  margin: 34px auto 0;
  display: grid;
  grid-template-columns: minmax(0, 0.88fr) minmax(420px, 1.12fr);
  gap: 24px;
  align-items: stretch;
  min-height: 660px;
}

.desk-hero::before {
  content: "";
  position: absolute;
  inset: 20px -18px 34px;
  z-index: -2;
  border: 1px solid rgba(255, 255, 255, 0.8);
  border-radius: 8px;
  background:
    linear-gradient(115deg, rgba(255, 255, 255, 0.84), rgba(229, 250, 252, 0.64) 44%, rgba(255, 238, 231, 0.72)),
    linear-gradient(90deg, rgba(32, 214, 228, 0.12), rgba(107, 125, 255, 0.07));
  box-shadow: var(--shadow);
  backdrop-filter: blur(28px) saturate(1.2);
  -webkit-backdrop-filter: blur(28px) saturate(1.2);
}

.desk-hero::after {
  content: "";
  position: absolute;
  inset: 62px 24px auto;
  height: 2px;
  z-index: -1;
  background: linear-gradient(90deg, transparent, rgba(32, 214, 228, 0.72), rgba(255, 123, 88, 0.6), transparent);
  transform: translate3d(var(--pointer-x, 0), 0, 0);
  opacity: 0.75;
}

.desk-copy {
  display: flex;
  min-width: 0;
  flex-direction: column;
  justify-content: center;
  padding: 34px 0 34px 28px;
}

.signal-label {
  margin: 0 0 10px;
  color: #a24b30;
  font-size: 13px;
  font-weight: 900;
}

.desk-copy h1,
.inner-panel h1,
.article-note h1 {
  margin: 0 0 22px;
  max-width: 100%;
  color: var(--ink);
  font-size: 64px;
  line-height: 1.04;
  overflow-wrap: anywhere;
  word-break: normal;
}

.desk-copy h1 span {
  display: block;
  color: #0b6374;
}

.hero-brief,
.desk-copy p,
.inner-panel p {
  max-width: 760px;
  color: var(--muted);
  font-size: 18px;
  overflow-wrap: anywhere;
}

.hero-brief span {
  display: block;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 26px 0;
}

.action-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 11px 18px;
  border: 1px solid var(--line-strong);
  border-radius: 8px;
  text-decoration: none;
  font-weight: 900;
  transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.action-link:hover {
  transform: translateY(-2px);
}

.action-link.main-action {
  border-color: rgba(10, 97, 112, 0.8);
  color: #fff;
  background: linear-gradient(135deg, #083a5d, #0d7b86 62%, #16b9c8);
  box-shadow: 0 18px 36px rgba(10, 97, 112, 0.22);
}

.action-link.soft-action {
  background: rgba(255, 255, 255, 0.68);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.desk-stamps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  max-width: 720px;
  margin-top: 16px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.58);
  overflow: hidden;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.desk-stamps span {
  padding: 13px 8px;
  border-right: 1px solid var(--line);
  font-weight: 900;
  text-align: center;
}

.desk-stamps span:last-child {
  border-right: 0;
}

.desk-visual {
  position: relative;
  align-self: center;
  min-width: 0;
  margin: 0;
  overflow: visible;
}

.desk-visual::before,
.desk-visual::after {
  content: "";
  position: absolute;
  pointer-events: none;
  border-radius: 8px;
}

.desk-visual::before {
  inset: auto 8% -20px 14%;
  height: 108px;
  z-index: -1;
  background: linear-gradient(90deg, rgba(32, 214, 228, 0.24), rgba(255, 123, 88, 0.16), rgba(107, 125, 255, 0.2));
  filter: blur(24px);
  opacity: 0.9;
}

.desk-visual::after {
  top: 8%;
  right: -10px;
  width: 38%;
  height: 30%;
  border: 1px solid rgba(255, 255, 255, 0.74);
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.58), rgba(255, 255, 255, 0.13)),
    repeating-linear-gradient(90deg, rgba(32, 214, 228, 0.18) 0 2px, transparent 2px 34px);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transform: translate3d(0, var(--float-y, 0), 0) rotate(-4deg);
}

.desk-visual img {
  width: 100%;
  aspect-ratio: 1672 / 941;
  object-fit: cover;
  border: 1px solid rgba(255, 255, 255, 0.86);
  border-radius: 8px;
  box-shadow: 0 30px 78px rgba(8, 44, 78, 0.22);
  transform: translate3d(0, var(--image-y, 0), 0);
}

.section-titlebar,
.lane-board,
.node-desk,
.access-window,
.article-rack,
.faq-desk,
.inner-panel,
.platform-sheet,
.install-steps,
.notice-panel,
.node-table,
.device-columns,
.access-grid,
.issue-buckets,
.mail-note,
.plain-grid,
.article-note {
  width: min(1120px, calc(100% - 36px));
  margin: 76px auto 0;
}

.section-titlebar {
  margin-bottom: 24px;
}

.section-titlebar h2,
.node-copy h2,
.notice-panel h2,
.inner-panel h1 {
  margin: 0 0 12px;
  color: var(--ink);
  font-size: 42px;
  line-height: 1.16;
}

.section-titlebar p,
.node-copy p,
.notice-panel p {
  color: var(--muted);
  font-size: 17px;
}

.lane-grid,
.access-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

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

.lane-grid article,
.access-grid article,
.route-guide,
.platform-sheet article,
.install-steps article,
.node-table article,
.device-columns article,
.issue-buckets article,
.plain-grid article,
.mail-note,
.answer-grid details {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: 0 18px 44px rgba(13, 58, 94, 0.08);
  backdrop-filter: blur(18px) saturate(1.18);
  -webkit-backdrop-filter: blur(18px) saturate(1.18);
}

.lane-grid article,
.access-grid article,
.route-guide,
.platform-sheet article,
.install-steps article,
.node-table article,
.device-columns article,
.issue-buckets article,
.plain-grid article,
.mail-note {
  padding: 22px;
}

.lane-grid span,
.platform-sheet span,
.device-columns span,
.route-guide span {
  display: inline-block;
  margin-bottom: 14px;
  padding: 6px 10px;
  border: 1px solid rgba(255, 123, 88, 0.24);
  border-radius: 8px;
  color: #99412b;
  background: rgba(255, 239, 232, 0.76);
  font-weight: 900;
}

.lane-grid h3,
.access-grid h3,
.access-grid h2,
.platform-sheet h2,
.device-columns h2,
.issue-buckets h2,
.plain-grid h2 {
  margin: 0 0 10px;
  font-size: 23px;
  line-height: 1.2;
  overflow-wrap: anywhere;
}

.lane-grid p,
.access-grid p,
.platform-sheet p,
.platform-sheet li,
.device-columns p,
.issue-buckets p,
.plain-grid p {
  color: var(--muted);
  overflow-wrap: anywhere;
}

.lane-grid a,
.rail-link,
.chip-link {
  color: #0a6170;
  font-weight: 900;
  text-decoration: none;
}

.node-desk {
  display: grid;
  grid-template-columns: minmax(0, 0.84fr) minmax(360px, 1.16fr);
  gap: 24px;
  padding: 34px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.node-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.node-list article {
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.62);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.node-list strong {
  display: block;
  margin-bottom: 8px;
  font-size: 18px;
}

.node-list p {
  margin: 0;
  color: var(--muted);
}

.article-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.article-grid.full {
  grid-template-columns: repeat(3, 1fr);
}

.route-guide {
  min-height: 238px;
}

.route-guide time {
  display: inline-block;
  margin-right: 8px;
  color: var(--muted);
  font-size: 13px;
}

.route-guide h3 {
  margin: 14px 0 10px;
  font-size: 20px;
  line-height: 1.28;
  overflow-wrap: anywhere;
}

.route-guide h3 a {
  text-decoration: none;
}

.route-guide p {
  margin: 0;
  color: var(--muted);
}

.answer-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.answer-grid details {
  padding: 18px;
}

.answer-grid summary {
  cursor: pointer;
  font-weight: 900;
}

.answer-grid p {
  margin-bottom: 0;
  color: var(--muted);
}

.inner-panel {
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
  box-shadow: var(--shadow);
  backdrop-filter: blur(20px) saturate(1.18);
  -webkit-backdrop-filter: blur(20px) saturate(1.18);
}

.platform-sheet {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.platform-sheet article {
  scroll-margin-top: 92px;
}

.install-steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.notice-panel {
  padding: 30px;
  border: 1px solid rgba(255, 123, 88, 0.24);
  border-radius: 8px;
  background: linear-gradient(135deg, rgba(255, 250, 246, 0.9), rgba(230, 250, 252, 0.72));
  box-shadow: 0 18px 44px rgba(141, 72, 42, 0.08);
}

.node-table {
  display: grid;
  gap: 10px;
}

.node-table article {
  display: grid;
  grid-template-columns: 180px minmax(0, 1fr);
  gap: 16px;
  align-items: start;
}

.node-table strong {
  font-size: 20px;
}

.node-table p {
  margin: 0;
  color: var(--muted);
}

.device-columns,
.issue-buckets {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
}

.mail-note {
  background: rgba(232, 248, 249, 0.76);
}

.archive-mast {
  padding: 26px;
  border: 1px solid rgba(255, 123, 88, 0.24);
  border-radius: 8px;
  background: rgba(255, 247, 242, 0.84);
}

.article-note {
  max-width: 900px;
  padding: 52px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-strong);
  box-shadow: var(--shadow);
}

.article-note header time,
.article-note header span {
  display: inline-block;
  margin: 12px 10px 0 0;
  color: var(--muted);
}

.article-note header p {
  color: var(--muted);
  font-size: 19px;
}

.article-note section {
  margin-top: 20px;
  padding-top: 20px;
  border-top: 1px solid var(--line);
}

.article-note h2 {
  margin: 0 0 8px;
  font-size: 26px;
}

.article-note p {
  color: #304052;
}

.article-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 26px;
  padding-top: 22px;
  border-top: 1px solid var(--line);
}

.yunti-footer {
  width: min(1180px, calc(100% - 36px));
  margin: 86px auto 28px;
  padding: 28px;
  display: grid;
  grid-template-columns: 1.35fr repeat(3, 1fr);
  gap: 26px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.64);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.yunti-footer h2 {
  margin: 0 0 10px;
  font-size: 14px;
}

.yunti-footer p,
.yunti-footer a {
  color: var(--muted);
}

.yunti-footer a {
  display: block;
  margin: 5px 0;
  text-decoration: none;
}

.yunti-footer strong {
  font-size: 22px;
}

.is-lit {
  box-shadow: 0 26px 58px rgba(10, 97, 112, 0.15);
  transform: translateY(-3px);
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.motion-ready [data-reveal] {
  opacity: 1;
  transform: none;
}

.motion-ready [data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
  transition: opacity 0.55s ease, transform 0.55s ease;
  transition-delay: var(--reveal-delay, 0ms);
}

@keyframes visualFloat {
  0%, 100% { --image-y: 0px; --float-y: 0px; }
  50% { --image-y: -8px; --float-y: 12px; }
}

@property --image-y {
  syntax: "<length>";
  inherits: true;
  initial-value: 0px;
}

@property --float-y {
  syntax: "<length>";
  inherits: true;
  initial-value: 0px;
}

.desk-visual {
  animation: visualFloat 7s ease-in-out infinite;
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    scroll-behavior: auto !important;
    transition-duration: 0.001ms !important;
  }
}

@media (max-width: 1060px) {
  .desk-copy h1,
  .inner-panel h1,
  .article-note h1 {
    font-size: 48px;
  }

  .route-nav {
    display: none;
  }

  .fold-nav {
    display: block;
  }

  .fold-nav summary {
    padding: 8px 12px;
    border: 1px solid var(--line);
    border-radius: 8px;
    list-style: none;
    font-weight: 900;
    background: rgba(255, 255, 255, 0.72);
  }

  .fold-nav nav {
    position: absolute;
    top: 62px;
    right: 18px;
    display: grid;
    min-width: 190px;
    padding: 8px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: rgba(255, 255, 255, 0.92);
    box-shadow: var(--shadow);
  }

  .desk-hero,
  .node-desk,
  .yunti-footer {
    grid-template-columns: minmax(0, 1fr);
    min-height: 0;
  }

  .desk-copy {
    padding: 28px 20px 0;
  }

  .desk-visual {
    padding: 0 18px 22px;
  }

  .lane-grid,
  .access-grid,
  .access-grid.two,
  .article-grid,
  .article-grid.full,
  .platform-sheet,
  .install-steps,
  .device-columns,
  .issue-buckets,
  .plain-grid,
  .answer-grid {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 680px) {
  .yunti-shell {
    padding: 12px 14px;
  }

  .yunti-brand small {
    display: none;
  }

  .desk-hero {
    width: calc(100% - 28px);
    margin-top: 18px;
    overflow: hidden;
  }

  .desk-hero::before {
    inset: 0;
  }

  .desk-copy h1,
  .inner-panel h1,
  .article-note h1 {
    font-size: 34px;
    line-height: 1.14;
  }

  .section-titlebar h2,
  .node-copy h2,
  .notice-panel h2 {
    font-size: 30px;
  }

  .hero-brief,
  .desk-copy p,
  .inner-panel p {
    font-size: 16px;
  }

  .hero-actions .action-link {
    width: 100%;
  }

  .desk-stamps,
  .lane-grid,
  .access-grid,
  .access-grid.two,
  .article-grid,
  .article-grid.full,
  .platform-sheet,
  .install-steps,
  .device-columns,
  .issue-buckets,
  .plain-grid,
  .answer-grid,
  .node-list {
    grid-template-columns: 1fr;
  }

  .lane-board,
  .node-desk,
  .access-window,
  .article-rack,
  .faq-desk,
  .inner-panel,
  .platform-sheet,
  .install-steps,
  .notice-panel,
  .node-table,
  .device-columns,
  .access-grid,
  .issue-buckets,
  .mail-note,
  .plain-grid,
  .article-note {
    width: min(100% - 28px, 1120px);
    margin-top: 50px;
  }

  .inner-panel,
  .article-note,
  .notice-panel {
    padding: 20px;
  }

  .node-table article {
    grid-template-columns: 1fr;
  }

  .desk-visual img {
    aspect-ratio: 4 / 3;
  }
}