:root {
  color-scheme: light;
  --ink: #162131;
  --muted: #5a6878;
  --soft: #7b8796;
  --paper: #f6fbff;
  --white: #ffffff;
  --line: rgba(22, 33, 49, 0.12);
  --line-strong: rgba(22, 33, 49, 0.22);
  --blue: #3157d8;
  --cyan: #1ea8c6;
  --mint: #7ee3b4;
  --amber: #ffb13b;
  --red: #ef4056;
  --green: #15956f;
  --shadow: 0 24px 70px rgba(48, 72, 105, 0.16);
  --radius: 8px;
  --max: 1180px;
  --header-h: 74px;
  --font-body: "Aptos", "Inter", "Segoe UI Variable", "Segoe UI", system-ui, sans-serif;
  --font-display: "Space Grotesk", "Aptos Display", "Segoe UI Variable", system-ui, sans-serif;
  --font-mono: "SFMono-Regular", "Cascadia Mono", Consolas, monospace;
  font-family: var(--font-body);
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  scroll-behavior: smooth;
  background: var(--paper);
}

body {
  min-width: 320px;
  margin: 0;
  overflow-x: hidden;
  color: var(--ink);
  background:
    radial-gradient(circle at 10% 8%, rgba(255, 177, 59, 0.22), transparent 28%),
    radial-gradient(circle at 88% 18%, rgba(30, 168, 198, 0.2), transparent 28%),
    linear-gradient(180deg, #f6fbff 0%, #eef8ff 48%, #f9fbf6 100%);
}

body::selection {
  color: var(--ink);
  background: var(--mint);
}

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

button {
  color: inherit;
  font: inherit;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 100;
  padding: 10px 12px;
  color: var(--ink);
  background: var(--mint);
  border-radius: var(--radius);
  transform: translateY(-160%);
  transition: transform 160ms ease;
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 22px;
  align-items: center;
  min-height: var(--header-h);
  padding: 14px clamp(18px, 4vw, 44px);
  background: rgba(255, 255, 255, 0.82);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(16px);
}

.site-header.is-scrolled {
  box-shadow: 0 16px 38px rgba(48, 72, 105, 0.12);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: max-content;
}

.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  font-family: var(--font-mono);
  font-weight: 900;
  background: linear-gradient(135deg, var(--mint), #9ddfff 54%, var(--amber));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 12px 28px rgba(30, 168, 198, 0.18);
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  line-height: 1.05;
}

.brand small,
.site-nav,
.header-action,
.kicker,
.button,
.section-tile,
.article-section,
.article-state,
.flow-card {
  font-family: var(--font-mono);
  letter-spacing: 0;
}

.brand small {
  margin-top: 2px;
  color: var(--soft);
  font-size: 0.72rem;
  font-weight: 800;
  text-transform: uppercase;
}

.site-nav {
  display: flex;
  justify-content: center;
  gap: clamp(16px, 3vw, 34px);
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 900;
  text-transform: uppercase;
}

.site-nav a {
  position: relative;
  padding: 8px 0;
}

.site-nav a::after {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 2px;
  content: "";
  background: linear-gradient(90deg, var(--red), var(--amber), var(--cyan));
  border-radius: 999px;
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 160ms ease;
}

.site-nav a:hover::after {
  transform: scaleX(1);
}

.header-action {
  display: inline-grid;
  min-height: 40px;
  place-items: center;
  padding: 0 16px;
  color: #fff;
  font-size: 0.78rem;
  font-weight: 900;
  text-transform: uppercase;
  background: var(--ink);
  border-radius: var(--radius);
  box-shadow: 0 14px 30px rgba(22, 33, 49, 0.2);
}

.hero,
.section-area,
.articles-area,
.lab-area,
.site-footer {
  width: min(calc(100% - 36px), var(--max));
  margin: 0 auto;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.86fr) minmax(420px, 1.14fr);
  gap: clamp(34px, 6vw, 78px);
  align-items: center;
  min-height: 720px;
  padding: clamp(52px, 7vw, 84px) 0;
}

.hero > *,
.section-area > *,
.lab-area > * {
  min-width: 0;
}

.kicker {
  margin: 0 0 14px;
  color: var(--blue);
  font-size: 0.78rem;
  font-weight: 900;
  text-transform: uppercase;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1,
h2,
h3 {
  font-family: var(--font-display);
  letter-spacing: 0;
}

h1 {
  max-width: 10ch;
  margin-bottom: 22px;
  font-size: clamp(3.3rem, 7vw, 6.2rem);
  line-height: 0.92;
}

h2 {
  margin-bottom: 16px;
  font-size: clamp(2rem, 4.6vw, 4rem);
  line-height: 1;
}

h3 {
  margin-bottom: 10px;
  font-size: 1.22rem;
  line-height: 1.18;
}

.hero-lead,
.section-copy p,
.section-title p,
.lab-copy p {
  color: var(--muted);
  font-size: clamp(1.02rem, 2vw, 1.18rem);
  line-height: 1.68;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 30px;
}

.button {
  display: inline-flex;
  min-height: 52px;
  align-items: center;
  justify-content: center;
  padding: 0 18px;
  font-size: 0.82rem;
  font-weight: 900;
  text-transform: uppercase;
  border-radius: var(--radius);
}

.button.primary {
  color: #fff;
  background: linear-gradient(135deg, #172235, var(--blue), var(--cyan));
  box-shadow: 0 18px 42px rgba(49, 87, 216, 0.26);
}

.button.secondary {
  background: rgba(255, 255, 255, 0.8);
  border: 1px solid var(--line);
}

.network-panel {
  position: relative;
  width: 100%;
  max-width: 100%;
  min-height: 560px;
  overflow: hidden;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.9), rgba(226, 246, 255, 0.78)),
    #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.scene-grid {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(22, 33, 49, 0.06) 1px, transparent 1px),
    linear-gradient(180deg, rgba(22, 33, 49, 0.06) 1px, transparent 1px);
  background-size: 44px 44px;
  animation: gridMove 16s linear infinite;
}

.device,
.core-switch {
  position: absolute;
  z-index: 3;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.94);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 18px 42px rgba(48, 72, 105, 0.16);
}

.device {
  display: grid;
  width: 158px;
  min-height: 126px;
  padding: 14px;
  animation: deviceFloat 5.8s ease-in-out infinite;
}

.device-icon {
  display: inline-grid;
  width: 44px;
  height: 34px;
  place-items: center;
  margin-bottom: 12px;
  color: #fff;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 900;
  background: var(--ink);
  border-radius: 6px;
}

.device strong,
.device small {
  display: block;
}

.device small {
  color: var(--soft);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 900;
  text-transform: uppercase;
}

.device i {
  display: block;
  height: 6px;
  margin-top: 7px;
  background: linear-gradient(90deg, var(--cyan), transparent);
  border-radius: 999px;
  animation: barPulse 2.2s ease-in-out infinite;
}

.device i:nth-of-type(2) {
  width: 76%;
  animation-delay: 0.25s;
}

.device i:nth-of-type(3) {
  width: 54%;
  animation-delay: 0.5s;
}

.server-card {
  top: 72px;
  left: 42px;
}

.router-card {
  top: 82px;
  right: 42px;
  animation-delay: -1.5s;
}

.cloud-card {
  right: 88px;
  bottom: 54px;
  animation-delay: -2.6s;
}

.core-switch {
  top: 238px;
  left: 50%;
  width: min(420px, calc(100% - 80px));
  padding: 18px;
  transform: translateX(-50%);
  animation: switchBreathe 4.8s ease-in-out infinite;
}

.switch-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 42px;
  padding: 0 12px;
  color: #dff8ff;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 900;
  text-transform: uppercase;
  background: linear-gradient(135deg, #172235, #27456f);
  border-radius: 6px;
}

.switch-head strong {
  color: var(--mint);
}

.ports {
  display: grid;
  grid-template-columns: repeat(8, 1fr);
  gap: 7px;
  margin-top: 15px;
}

.ports i {
  display: block;
  aspect-ratio: 1.25;
  background: #172235;
  border: 2px solid rgba(255, 255, 255, 0.72);
  border-radius: 4px;
  animation: portBlink 1.55s ease-in-out infinite;
}

.ports i:nth-child(2n) {
  animation-delay: 0.28s;
}

.ports i:nth-child(3n) {
  animation-delay: 0.56s;
}

.leds {
  display: flex;
  gap: 7px;
  margin-top: 14px;
}

.leds i {
  width: 9px;
  height: 9px;
  background: var(--green);
  border-radius: 999px;
  box-shadow: 0 0 18px rgba(21, 149, 111, 0.55);
  animation: ledPulse 1.4s ease-in-out infinite;
}

.leds i:nth-child(2) {
  background: var(--amber);
  animation-delay: 0.25s;
}

.leds i:nth-child(3) {
  background: var(--cyan);
  animation-delay: 0.5s;
}

.leds i:nth-child(4) {
  animation-delay: 0.75s;
}

.cable {
  position: absolute;
  z-index: 2;
  height: 12px;
  background:
    repeating-linear-gradient(90deg, #26384d 0 22px, #38546c 22px 34px);
  border-radius: 999px;
  box-shadow: 0 12px 26px rgba(22, 33, 49, 0.14);
  transform-origin: left center;
}

.cable-a {
  top: 214px;
  left: 170px;
  width: 245px;
  transform: rotate(23deg);
}

.cable-b {
  top: 218px;
  right: 176px;
  width: 240px;
  transform: rotate(156deg);
}

.cable-c {
  right: 198px;
  bottom: 174px;
  width: 250px;
  transform: rotate(32deg);
}

.packet {
  position: absolute;
  top: 50%;
  left: 8%;
  width: 14px;
  height: 14px;
  background: #fff;
  border: 3px solid var(--red);
  border-radius: 4px;
  box-shadow: 0 0 20px rgba(239, 64, 86, 0.42);
  transform: translate(-50%, -50%) rotate(45deg);
  animation: packetMove 2.2s linear infinite;
}

.packet.two {
  width: 10px;
  height: 10px;
  border-color: var(--cyan);
  animation-delay: 1s;
}

.rj45 {
  position: absolute;
  top: 50%;
  right: -8px;
  width: 46px;
  height: 28px;
  background: linear-gradient(180deg, #e9f1f8, #a8bccb);
  border: 1px solid rgba(22, 33, 49, 0.28);
  border-radius: 5px 8px 8px 5px;
  box-shadow: 0 12px 22px rgba(22, 33, 49, 0.18);
}

.rj45::before {
  position: absolute;
  top: 5px;
  right: -10px;
  width: 14px;
  height: 18px;
  content: "";
  background: repeating-linear-gradient(90deg, #edc450 0 3px, #7b6220 3px 4px);
  border: 1px solid rgba(22, 33, 49, 0.24);
  border-radius: 3px;
}

.rj45::after {
  position: absolute;
  top: -7px;
  left: 9px;
  width: 24px;
  height: 10px;
  content: "";
  border: 2px solid rgba(22, 33, 49, 0.2);
  border-bottom: 0;
  border-radius: 5px 5px 0 0;
}

.rj45 b {
  position: absolute;
  right: 11px;
  bottom: 4px;
  width: 25px;
  height: 5px;
  background: repeating-linear-gradient(90deg, #f2c54f 0 3px, transparent 3px 5px);
  border-radius: 999px;
}

.plug-a {
  transform: translate(-80px, -50%);
  animation: plugA 4.2s cubic-bezier(0.65, 0, 0.25, 1) infinite;
}

.plug-b {
  transform: translate(-86px, -50%) rotate(180deg);
  animation: plugB 4.6s cubic-bezier(0.65, 0, 0.25, 1) infinite;
}

.orbit {
  position: absolute;
  right: 54px;
  bottom: 40px;
  z-index: 1;
  width: 190px;
  height: 190px;
  border: 1px dashed rgba(22, 33, 49, 0.24);
  border-radius: 50%;
  animation: orbitSpin 22s linear infinite;
}

.orbit span {
  position: absolute;
  display: grid;
  min-width: 72px;
  min-height: 30px;
  place-items: center;
  color: var(--ink);
  font-family: var(--font-mono);
  font-size: 0.72rem;
  font-weight: 900;
  background: rgba(255, 255, 255, 0.9);
  border: 1px solid var(--line);
  border-radius: 999px;
  box-shadow: 0 12px 28px rgba(48, 72, 105, 0.12);
  animation: orbitLabel 22s linear infinite;
}

.orbit span:nth-child(1) {
  top: -14px;
  left: 58px;
}

.orbit span:nth-child(2) {
  top: 78px;
  right: -40px;
}

.orbit span:nth-child(3) {
  bottom: -14px;
  left: 58px;
}

.orbit span:nth-child(4) {
  top: 78px;
  left: -30px;
}

.section-area,
.articles-area,
.lab-area {
  padding: clamp(70px, 10vw, 120px) 0;
}

.section-area {
  display: grid;
  grid-template-columns: minmax(300px, 430px) minmax(0, 1fr);
  gap: clamp(32px, 6vw, 76px);
  align-items: center;
}

.section-menu,
.article-card,
.flow-card {
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.section-menu {
  padding: 12px;
}

.section-menu-head {
  display: flex;
  justify-content: space-between;
  gap: 14px;
  align-items: center;
  min-height: 44px;
  padding: 0 6px 10px;
  border-bottom: 1px solid var(--line);
}

.section-menu-head div {
  display: flex;
  gap: 10px;
  align-items: center;
}

.section-menu-head h2 {
  margin: 0;
  font-size: 1.08rem;
  line-height: 1;
}

.head-icon {
  display: grid;
  width: 24px;
  height: 24px;
  place-items: center;
  color: #fff;
  font-family: var(--font-mono);
  font-size: 0.86rem;
  font-weight: 900;
  background: var(--ink);
  border-radius: 6px;
}

.collapse-icon {
  width: 9px;
  height: 9px;
  border-top: 2px solid currentColor;
  border-left: 2px solid currentColor;
  transform: rotate(45deg) translateY(3px);
}

.section-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 8px;
  padding-top: 12px;
}

.section-tile {
  position: relative;
  display: grid;
  min-width: 0;
  min-height: 76px;
  gap: 6px;
  place-items: center;
  padding: 8px 4px;
  color: #606d7c;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--radius);
  cursor: pointer;
  transition: transform 160ms ease, background 160ms ease, color 160ms ease, border-color 160ms ease;
}

.section-tile:hover {
  color: var(--ink);
  background: #f2f7fb;
  border-color: var(--line);
  transform: translateY(-2px);
}

.section-tile.is-active {
  color: #fff;
  background: linear-gradient(135deg, var(--red), #ff7438);
  box-shadow: 0 18px 34px rgba(239, 64, 86, 0.22);
}

.section-tile span {
  display: grid;
  min-width: 30px;
  height: 26px;
  place-items: center;
  font-size: 0.66rem;
  font-weight: 900;
  background: rgba(22, 33, 49, 0.08);
  border-radius: 6px;
}

.section-tile.is-active span {
  background: rgba(255, 255, 255, 0.18);
}

.section-tile strong {
  max-width: 100%;
  overflow-wrap: anywhere;
  font-size: 0.72rem;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.section-tile small {
  position: absolute;
  top: 5px;
  right: 6px;
  font-size: 0.62rem;
  font-weight: 900;
  opacity: 0.7;
}

.articles-area {
  border-top: 1px solid var(--line);
}

.section-title {
  max-width: 760px;
  margin-bottom: 32px;
}

.article-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 18px;
}

.article-card {
  position: relative;
  display: grid;
  min-height: 250px;
  padding: 22px;
  overflow: hidden;
  box-shadow: 0 18px 48px rgba(48, 72, 105, 0.12);
}

.article-card::before {
  position: absolute;
  inset: 0 0 auto;
  height: 4px;
  content: "";
  background: linear-gradient(90deg, var(--red), var(--amber), var(--cyan), var(--blue));
}

.article-card p {
  color: var(--muted);
  line-height: 1.62;
}

.article-section,
.article-state {
  display: inline-flex;
  width: max-content;
  min-height: 28px;
  align-items: center;
  padding: 0 9px;
  font-size: 0.7rem;
  font-weight: 900;
  text-transform: uppercase;
  border-radius: 999px;
}

.article-section {
  margin-bottom: 18px;
  color: var(--ink);
  background: #eef3f7;
}

.article-state {
  margin-left: 6px;
  color: #fff;
  background: var(--ink);
}

.article-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-self: end;
  margin-top: 10px;
}

.article-tags span {
  padding: 6px 8px;
  color: var(--soft);
  font-size: 0.78rem;
  font-weight: 800;
  background: #eef3f7;
  border-radius: 999px;
}

.lab-area {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(320px, 1.05fr);
  gap: clamp(32px, 6vw, 76px);
  align-items: center;
  border-top: 1px solid var(--line);
}

.flow-card {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  align-items: center;
  min-height: 220px;
  padding: 24px;
  font-size: 0.8rem;
  font-weight: 900;
  text-transform: uppercase;
}

.flow-card span {
  display: inline-flex;
  min-height: 42px;
  align-items: center;
  padding: 0 14px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.flow-card i {
  width: 38px;
  height: 3px;
  background: linear-gradient(90deg, var(--red), var(--cyan));
  border-radius: 999px;
  animation: flowPulse 1.6s ease-in-out infinite;
}

.site-footer {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding: 28px 0;
  color: var(--muted);
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 900;
  text-transform: uppercase;
  border-top: 1px solid var(--line);
}

.reveal {}

@keyframes gridMove {
  to {
    background-position: 44px 44px;
  }
}

@keyframes revealIn {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes deviceFloat {
  0%,
  100% {
    transform: translateY(0) rotate(0deg);
  }
  50% {
    transform: translateY(-8px) rotate(1.5deg);
  }
}

@keyframes switchBreathe {
  0%,
  100% {
    transform: translateX(-50%) translateY(0);
  }
  50% {
    transform: translateX(-50%) translateY(-6px);
  }
}

@keyframes barPulse {
  0%,
  100% {
    opacity: 0.45;
    transform: scaleX(0.72);
    transform-origin: left;
  }
  50% {
    opacity: 1;
    transform: scaleX(1);
  }
}

@keyframes portBlink {
  0%,
  100% {
    border-color: rgba(255, 255, 255, 0.72);
    box-shadow: none;
  }
  45% {
    border-color: var(--mint);
    box-shadow: 0 0 18px rgba(126, 227, 180, 0.72);
  }
}

@keyframes ledPulse {
  0%,
  100% {
    opacity: 0.55;
    transform: scale(0.9);
  }
  50% {
    opacity: 1;
    transform: scale(1.14);
  }
}

@keyframes packetMove {
  from {
    left: 8%;
    opacity: 0;
  }
  12%,
  88% {
    opacity: 1;
  }
  to {
    left: 92%;
    opacity: 0;
  }
}

@keyframes plugA {
  0%,
  18% {
    transform: translate(-80px, -50%);
  }
  45%,
  78% {
    transform: translate(0, -50%);
  }
  100% {
    transform: translate(-80px, -50%);
  }
}

@keyframes plugB {
  0%,
  18% {
    transform: translate(-86px, -50%) rotate(180deg);
  }
  45%,
  78% {
    transform: translate(0, -50%) rotate(180deg);
  }
  100% {
    transform: translate(-86px, -50%) rotate(180deg);
  }
}

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

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

@keyframes flowPulse {
  0%,
  100% {
    opacity: 0.35;
    transform: scaleX(0.72);
  }
  50% {
    opacity: 1;
    transform: scaleX(1);
  }
}

@media (max-width: 980px) {
  .hero,
  .section-area,
  .lab-area {
    grid-template-columns: 1fr;
  }

  .network-panel {
    min-height: 520px;
  }

  .article-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 760px) {
  :root {
    --header-h: 68px;
  }

  .hero,
  .section-area,
  .articles-area,
  .lab-area,
  .site-footer {
    width: auto;
    margin-right: 36px;
    margin-left: 18px;
  }

  .site-header {
    grid-template-columns: 1fr auto;
    padding-inline: 14px;
  }

  .site-nav {
    display: none;
  }

  .brand small,
  .header-action {
    display: none;
  }

  h1 {
    font-size: clamp(3rem, 17vw, 4.3rem);
  }

  .hero {
    padding-top: 42px;
  }

  .hero-actions {
    flex-direction: column;
    align-items: stretch;
    width: 100%;
  }

  .button {
    width: 100%;
  }

  .network-panel {
    display: grid;
    gap: 12px;
    width: 100%;
    min-height: auto;
    padding: 18px;
  }

  .device,
  .core-switch {
    position: relative;
    top: auto;
    right: auto;
    bottom: auto;
    left: auto;
    width: 100%;
    transform: none;
    animation: none;
  }

  .device {
    min-height: 100px;
    padding: 11px;
  }

  .device-icon {
    width: 38px;
    height: 30px;
  }

  .core-switch {
    width: auto;
  }

  .cable-a,
  .cable-b,
  .cable-c,
  .orbit {
    display: none;
  }

  .section-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

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

  .flow-card {
    min-height: 180px;
  }

  .site-footer {
    flex-direction: column;
  }
}

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

  .reveal {
    animation: none;
  }
}