:root {
  --wifi-blue: #0792ff;
  --wifi-blue-deep: #006ed0;
  --wifi-ink: #071a2b;
  --wifi-muted: #5c6b78;
  --wifi-line: #cfe5f5;
  --wifi-pale: #edf8ff;
  --wifi-cyan: #5bd9ed;
  --wifi-white: #ffffff;
  --wifi-page: #f7fbfe;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}

body {
  margin: 0;
  color: var(--wifi-ink);
  background: var(--wifi-page);
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", -apple-system, BlinkMacSystemFont, "Segoe UI", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  overflow-x: hidden;
}

body.menu-open {
  overflow: hidden;
}

button,
a {
  font: inherit;
}

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

button {
  color: inherit;
}

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

:focus-visible {
  outline: 3px solid #ffcf3d;
  outline-offset: 4px;
}

.signal-head {
  position: sticky;
  z-index: 50;
  top: 0;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  width: min(1180px, calc(100% - 40px));
  min-height: 72px;
  margin: 16px auto 0;
  padding: 8px 10px 8px 14px;
  border: 1px solid rgba(7, 146, 255, .2);
  border-radius: 14px;
  background: rgba(255, 255, 255, .96);
  box-shadow: 0 12px 36px rgba(9, 51, 84, .08);
  transition: box-shadow .2s ease, transform .2s ease;
}

.signal-head.is-scrolled {
  box-shadow: 0 14px 38px rgba(9, 51, 84, .15);
}

.signal-brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 800;
}

.signal-brand img {
  width: 42px;
  height: 42px;
  border-radius: 10px;
}

.signal-route {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: clamp(14px, 2.2vw, 28px);
  color: #385267;
  font-size: 14px;
}

.signal-route a,
.signal-route button {
  position: relative;
  padding: 9px 0;
  border: 0;
  background: none;
  cursor: pointer;
}

.signal-route a::after,
.signal-route button::after {
  position: absolute;
  right: 50%;
  bottom: 2px;
  left: 50%;
  height: 2px;
  background: var(--wifi-blue);
  content: "";
  transition: right .2s ease, left .2s ease;
}

.signal-route a:hover::after,
.signal-route button:hover::after {
  right: 0;
  left: 0;
}

.head-get {
  padding: 11px 18px;
  border: 1px solid var(--wifi-blue);
  border-radius: 9px;
  color: var(--wifi-white);
  background: var(--wifi-blue);
  font-size: 14px;
  font-weight: 700;
  box-shadow: 0 8px 18px rgba(7, 146, 255, .2);
}

.head-get:hover,
.solid-action:hover,
.final-copy > a:hover {
  background: var(--wifi-blue-deep);
}

.signal-menu {
  display: none;
  border: 0;
  background: transparent;
  font-size: 25px;
  cursor: pointer;
}

.frequency-intro {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.12fr) minmax(0, .88fr);
  align-items: center;
  width: min(1180px, calc(100% - 40px));
  min-height: 560px;
  margin: 0 auto;
  padding: 34px 0 26px;
  overflow: clip;
}

.frequency-intro::before {
  position: absolute;
  z-index: -1;
  top: 7%;
  right: -9vw;
  width: 58vw;
  height: 58vw;
  max-width: 760px;
  max-height: 760px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(7, 146, 255, .16) 0, rgba(7, 146, 255, .06) 42%, transparent 70%);
  content: "";
}

.intro-copy {
  position: relative;
  z-index: 2;
  min-width: 0;
  max-width: 700px;
}

.live-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 10px;
  padding: 5px 10px;
  border: 1px solid #b8dcf8;
  border-radius: 99px;
  color: var(--wifi-blue-deep);
  background: #f3faff;
  font-size: 13px;
  font-weight: 700;
}

.live-label span {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #17bd76;
  box-shadow: 0 0 0 5px rgba(23, 189, 118, .12);
}

.intro-copy h1 {
  margin: 0;
  color: #031728;
  font-size: clamp(38px, 3.2vw, 46px);
  line-height: 1.18;
  white-space: nowrap;
}

.intro-lead {
  max-width: 700px;
  margin: 18px 0 0;
  color: #415b6f;
  font-size: 17px;
}

.intro-actions {
  display: flex;
  align-items: center;
  gap: 22px;
  margin-top: 22px;
}

.solid-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: 50px;
  padding: 0 23px;
  border-radius: 10px;
  color: var(--wifi-white);
  background: var(--wifi-blue);
  font-weight: 700;
  box-shadow: 0 12px 26px rgba(7, 146, 255, .25);
  transition: background .2s ease, transform .2s ease;
}

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

.text-action {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  color: #27465d;
  font-weight: 700;
}

.text-action:hover {
  color: var(--wifi-blue-deep);
}

.signal-orbit {
  position: relative;
  height: 470px;
  margin: 0;
}

.orbit-ring {
  position: absolute;
  top: 50%;
  left: 54%;
  border: 1px solid rgba(7, 146, 255, .27);
  border-radius: 50%;
  transform: translate(-50%, -50%);
}

.orbit-ring::after {
  position: absolute;
  top: -5px;
  left: 50%;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--wifi-blue);
  box-shadow: 0 0 0 5px rgba(7, 146, 255, .12);
  content: "";
}

.orbit-ring-one {
  width: 460px;
  height: 460px;
}

.orbit-ring-two {
  width: 350px;
  height: 350px;
  border-style: dashed;
}

.orbit-ring-three {
  width: 250px;
  height: 250px;
}

.phone-proof {
  position: absolute;
  z-index: 2;
  top: 10px;
  left: 50%;
  width: 230px;
  padding: 8px;
  border: 2px solid #09233a;
  border-radius: 32px;
  background: #061929;
  box-shadow: 0 30px 70px rgba(1, 31, 55, .23);
  transform: translateX(-43%);
}

.phone-proof img {
  width: 100%;
  height: auto;
  border-radius: 24px;
}

.phone-top {
  position: absolute;
  z-index: 3;
  top: 14px;
  left: 50%;
  width: 74px;
  height: 17px;
  border-radius: 0 0 12px 12px;
  background: #061929;
  transform: translateX(-50%);
}

.phone-top span {
  display: block;
  width: 5px;
  height: 5px;
  margin: 4px auto;
  border-radius: 50%;
  background: #23445d;
}

.orbit-note {
  position: absolute;
  z-index: 4;
  display: flex;
  align-items: center;
  gap: 11px;
  min-width: 164px;
  padding: 11px 13px;
  border: 1px solid #b8dffa;
  border-radius: 10px;
  background: #fff;
  box-shadow: 0 14px 30px rgba(10, 64, 105, .12);
  color: #587083;
  font-size: 12px;
  line-height: 1.4;
}

.orbit-note i {
  display: grid;
  width: 35px;
  height: 35px;
  place-items: center;
  border-radius: 8px;
  color: white;
  background: var(--wifi-blue);
  font-size: 20px;
}

.orbit-note strong {
  color: var(--wifi-ink);
  font-size: 14px;
}

.note-safe {
  top: 68px;
  left: 5px;
}

.note-check {
  right: -8px;
  bottom: 62px;
}

.signal-orbit figcaption {
  position: absolute;
  right: 36px;
  bottom: 7px;
  display: flex;
  flex-direction: column;
  padding-left: 16px;
  border-left: 3px solid var(--wifi-blue);
  color: #577184;
  font-size: 12px;
  line-height: 1.5;
}

.signal-orbit figcaption strong {
  color: var(--wifi-ink);
  font-size: 15px;
}

.privacy-promise {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto 34px;
  border-top: 1px solid var(--wifi-line);
  border-bottom: 1px solid var(--wifi-line);
  background: rgba(255, 255, 255, .58);
}

.privacy-promise p {
  display: grid;
  grid-template-columns: auto 1fr;
  column-gap: 12px;
  margin: 0;
  padding: 20px 22px;
}

.privacy-promise p + p {
  border-left: 1px solid var(--wifi-line);
}

.privacy-promise i {
  grid-row: span 2;
  color: var(--wifi-blue);
  font-size: 27px;
}

.privacy-promise strong {
  font-size: 14px;
}

.privacy-promise span {
  color: var(--wifi-muted);
  font-size: 12px;
}

.day-network {
  display: grid;
  grid-template-columns: minmax(280px, .7fr) minmax(0, 1.3fr);
  gap: clamp(38px, 7vw, 88px);
  width: min(1080px, calc(100% - 40px));
  margin: 0 auto;
  padding: 70px 0 74px;
}

.scene-intro {
  align-self: start;
  position: sticky;
  top: 115px;
}

.scene-intro > p:first-child,
.screen-caption > p:first-child,
.notes-heading > p,
.question-aside > p:first-child,
.ledger-title p {
  margin: 0 0 8px;
  color: var(--wifi-blue-deep);
  font-size: 13px;
  font-weight: 800;
}

.scene-intro h2,
.screen-caption h2,
.vault-copy h2,
.ledger-title h2,
.notes-heading h2,
.question-aside h2,
.final-copy h2 {
  margin: 0;
  font-size: clamp(29px, 3.5vw, 38px);
  line-height: 1.3;
}

.scene-intro > p:last-child {
  margin: 20px 0 0;
  color: var(--wifi-muted);
}

.scene-route {
  position: relative;
  margin: 0;
  padding: 0;
  list-style: none;
}

.scene-route::before {
  position: absolute;
  top: 30px;
  bottom: 32px;
  left: 68px;
  width: 2px;
  background: var(--wifi-line);
  content: "";
}

.scene-route li {
  position: relative;
  display: grid;
  grid-template-columns: 32px 72px 1fr;
  align-items: start;
  gap: 20px;
  padding: 0 0 42px;
}

.scene-route li:last-child {
  padding-bottom: 0;
}

.scene-number {
  padding-top: 16px;
  color: #8da1b0;
  font-size: 12px;
  font-weight: 800;
}

.scene-mark {
  position: relative;
  z-index: 2;
  display: grid;
  width: 52px;
  height: 52px;
  place-items: center;
  margin-left: 10px;
  border: 7px solid var(--wifi-page);
  border-radius: 50%;
  color: #fff;
  background: var(--wifi-blue);
  font-size: 21px;
  box-shadow: 0 0 0 1px #9ed0f6;
}

.scene-route article {
  padding: 17px 20px 18px;
  border-left: 3px solid #bddff8;
  background: #fff;
  box-shadow: 0 8px 24px rgba(12, 56, 90, .06);
}

.scene-route li:nth-child(2) article,
.scene-route li:nth-child(4) article {
  transform: translateX(22px);
}

.scene-time {
  margin: 0 0 5px;
  color: var(--wifi-blue-deep);
  font-size: 12px;
  font-weight: 700;
}

.scene-route h3 {
  margin: 0 0 7px;
  font-size: 20px;
  line-height: 1.4;
}

.scene-route article > p:last-child {
  margin: 0;
  color: var(--wifi-muted);
  font-size: 14px;
}

.screen-current {
  display: grid;
  grid-template-columns: minmax(240px, .55fr) minmax(0, 1.45fr);
  gap: 34px;
  padding: 62px max(24px, calc((100vw - 1180px) / 2));
  color: white;
  background: #061a2a;
  overflow: hidden;
}

.screen-caption {
  align-self: center;
}

.screen-caption > p:first-child {
  color: #70c6ff;
}

.screen-caption > p:nth-of-type(2) {
  margin: 18px 0 0;
  color: #abc0ce;
}

.swipe-hint {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin-top: 24px;
  color: #72c9ff;
  font-size: 13px;
}

.screen-track {
  display: grid;
  grid-auto-columns: minmax(218px, 1fr);
  grid-auto-flow: column;
  gap: 18px;
  align-items: end;
  overflow-x: auto;
  padding: 18px 4px 22px;
  scrollbar-color: var(--wifi-blue) #153348;
  scrollbar-width: thin;
}

.screen-sheet {
  position: relative;
  margin: 0;
  padding: 7px;
  border: 1px solid #2a4f68;
  border-radius: 22px 22px 8px 8px;
  background: #0c2a3f;
  box-shadow: 0 18px 44px rgba(0, 0, 0, .24);
}

.screen-sheet img {
  width: 100%;
  height: auto;
  border-radius: 15px 15px 3px 3px;
}

.screen-sheet figcaption {
  display: flex;
  flex-direction: column;
  padding: 12px 9px 10px;
  font-size: 13px;
  line-height: 1.5;
}

.screen-sheet figcaption span {
  color: #9eb5c4;
  font-size: 11px;
}

.screen-sheet-a {
  transform: translateY(18px);
}

.screen-sheet-b {
  transform: translateY(-6px);
}

.screen-sheet-c {
  transform: translateY(24px);
}

.local-vault {
  display: grid;
  grid-template-columns: minmax(0, .85fr) minmax(480px, 1.15fr);
  gap: 56px;
  align-items: center;
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding: 72px 0 66px;
}

.vault-kicker {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  margin: 0 0 10px;
  color: var(--wifi-blue-deep);
  font-size: 13px;
  font-weight: 800;
}

.vault-copy > p:nth-of-type(2) {
  margin: 17px 0 22px;
  color: var(--wifi-muted);
}

.vault-copy ul {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.vault-copy li {
  display: flex;
  align-items: flex-start;
  gap: 8px;
  font-size: 14px;
}

.vault-copy li i {
  margin-top: 3px;
  color: var(--wifi-blue);
  font-size: 19px;
}

.data-path {
  position: relative;
  display: grid;
  grid-template-columns: 1fr auto 1.15fr auto 1fr;
  align-items: center;
  min-height: 300px;
  padding: 34px 24px 78px;
  border: 1px solid #a9d6f7;
  background-color: #eff9ff;
  background-image: linear-gradient(#cceafb 1px, transparent 1px), linear-gradient(90deg, #cceafb 1px, transparent 1px);
  background-size: 28px 28px;
}

.path-node {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 17px 10px;
  border: 1px solid #b5dbf5;
  background: white;
  text-align: center;
  font-size: 12px;
  font-weight: 700;
}

.path-node > i {
  color: var(--wifi-blue);
  font-size: 29px;
}

.path-node-main {
  border: 2px solid var(--wifi-blue);
  box-shadow: 7px 7px 0 rgba(7, 146, 255, .16);
}

.path-node-main img {
  width: 56px;
  height: 56px;
  border-radius: 13px;
}

.path-node-main small {
  color: var(--wifi-blue-deep);
  font-weight: 500;
}

.path-arrow {
  color: var(--wifi-blue);
  font-size: 24px;
}

.blocked-cloud {
  position: absolute;
  right: 25px;
  bottom: 19px;
  left: 25px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  color: #718895;
  font-size: 12px;
}

.blocked-cloud i {
  font-size: 26px;
}

.blocked-cloud span {
  position: absolute;
  width: 36px;
  height: 2px;
  margin-left: -132px;
  background: #e35c5c;
  transform: rotate(-35deg);
}

.blocked-cloud strong {
  font-weight: 600;
}

.capability-ledger {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding: 58px 0 72px;
  border-top: 4px solid var(--wifi-ink);
}

.ledger-title {
  display: grid;
  grid-template-columns: 110px 1fr;
  align-items: end;
  margin-bottom: 18px;
}

.ledger-title > span {
  color: var(--wifi-blue);
  font-size: 68px;
  font-weight: 900;
  line-height: .9;
}

.ability-promises {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  margin: 0 0 28px;
  padding: 1px;
  border: 1px solid #b9d9ee;
  background: #b9d9ee;
  list-style: none;
}

.ability-promises li {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 11px;
  align-items: center;
  padding: 15px 17px;
  background: #f2faff;
  color: #617584;
  font-size: 12px;
}

.ability-promises i {
  grid-row: span 2;
  color: var(--wifi-blue);
  font-size: 24px;
}

.ability-promises span {
  display: flex;
  flex-direction: column;
}

.ability-promises strong {
  color: var(--wifi-ink);
  font-size: 14px;
}

.ability-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  margin: 0;
  border-top: 1px solid #aebfca;
}

.ability-list > div {
  display: grid;
  grid-template-columns: minmax(190px, .8fr) 1.2fr;
  gap: 20px;
  padding: 24px 18px 24px 0;
  border-bottom: 1px solid #bfcdd7;
}

.ability-list > div:nth-child(odd) {
  padding-right: 30px;
  border-right: 1px solid #bfcdd7;
}

.ability-list > div:nth-child(even) {
  padding-left: 30px;
}

.ability-list dt {
  position: relative;
  padding-right: 34px;
  font-weight: 800;
}

.ability-list dt b {
  display: block;
  margin-bottom: 3px;
  color: var(--wifi-blue);
  font-size: 11px;
}

.ability-list dt i {
  position: absolute;
  top: 17px;
  right: 0;
  color: #7d99ac;
  font-size: 21px;
}

.ability-list dd {
  margin: 0;
  color: var(--wifi-muted);
  font-size: 13px;
}

.field-notes {
  padding: 62px max(24px, calc((100vw - 1120px) / 2)) 70px;
  background: #dff3ff;
}

.notes-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 28px;
}

.notes-heading > p {
  order: 2;
  margin-bottom: 7px;
}

.note-wall {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  align-items: start;
}

.user-note {
  margin: 0;
  padding: 18px;
  border: 1px solid #a8d5f1;
  border-radius: 5px;
  background: white;
  box-shadow: 5px 5px 0 rgba(7, 146, 255, .1);
}

.user-note:nth-child(4) {
  transform: translateY(16px);
}

.user-note:nth-child(5) {
  transform: translateY(-6px);
}

.note-wide {
  grid-column: span 2;
}

.note-blue {
  color: white;
  border-color: var(--wifi-blue);
  background: var(--wifi-blue);
}

.note-dark {
  color: white;
  border-color: #071a2b;
  background: #071a2b;
}

.user-note > div {
  display: flex;
  align-items: center;
  gap: 9px;
}

.user-avatar {
  display: grid;
  width: 32px;
  height: 32px;
  place-items: center;
  border: 1px solid currentColor;
  border-radius: 50%;
  font-size: 12px;
  font-weight: 800;
}

.user-name {
  font-size: 13px;
  font-weight: 800;
}

.note-score {
  margin-left: auto;
  color: #f2ad16;
  font-size: 11px;
}

.user-note blockquote {
  margin: 14px 0 0;
  font-size: 14px;
  line-height: 1.75;
}

.question-bank {
  display: grid;
  grid-template-columns: minmax(250px, .75fr) minmax(0, 1.25fr);
  gap: clamp(44px, 8vw, 100px);
  width: min(1080px, calc(100% - 40px));
  margin: 0 auto;
  padding: 72px 0;
}

.question-aside {
  align-self: start;
}

.question-aside > p:nth-of-type(2) {
  margin: 17px 0;
  color: var(--wifi-muted);
}

.question-aside a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--wifi-blue-deep);
  font-weight: 800;
}

.question-list {
  border-top: 2px solid var(--wifi-ink);
}

.question-list details {
  border-bottom: 1px solid #bed0dc;
}

.question-list summary {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 18px;
  padding: 20px 0;
  font-size: 17px;
  font-weight: 800;
  cursor: pointer;
  list-style: none;
}

.question-list summary::-webkit-details-marker {
  display: none;
}

.question-list summary i {
  transition: transform .2s ease;
}

.question-list details[open] summary i {
  color: var(--wifi-blue);
  transform: rotate(45deg);
}

.question-list details p {
  margin: -4px 44px 20px 0;
  color: var(--wifi-muted);
  font-size: 14px;
}

.final-scan {
  position: relative;
  display: grid;
  grid-template-columns: 1fr 250px;
  gap: 70px;
  align-items: center;
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto 40px;
  padding: 52px 58px;
  color: white;
  background: var(--wifi-blue);
  overflow: hidden;
}

.final-scan::before,
.final-scan::after {
  position: absolute;
  border: 1px solid rgba(255, 255, 255, .23);
  border-radius: 50%;
  content: "";
}

.final-scan::before {
  right: -100px;
  bottom: -130px;
  width: 420px;
  height: 420px;
}

.final-scan::after {
  right: -8px;
  bottom: -35px;
  width: 240px;
  height: 240px;
}

.final-copy {
  position: relative;
  z-index: 2;
  max-width: 650px;
}

.final-copy > p:first-child {
  display: flex;
  align-items: center;
  gap: 7px;
  margin: 0 0 5px;
  font-size: 13px;
  font-weight: 800;
}

.final-copy > p:nth-of-type(2) {
  max-width: 620px;
  margin: 14px 0 22px;
  color: rgba(255, 255, 255, .86);
}

.final-copy > a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  min-height: 48px;
  padding: 0 20px;
  border: 1px solid white;
  border-radius: 8px;
  color: var(--wifi-blue-deep);
  background: white;
  font-weight: 800;
}

.final-copy > a:hover {
  color: white;
  border-color: #0059aa;
}

.qr-card {
  position: relative;
  z-index: 2;
  padding: 14px;
  color: var(--wifi-ink);
  background: white;
  box-shadow: 8px 8px 0 rgba(0, 59, 115, .22);
  text-align: center;
}

.qr-card img {
  width: 100%;
  height: auto;
}

.qr-card span {
  display: block;
  margin-top: 7px;
  font-size: 13px;
  font-weight: 800;
}

.signal-foot {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 35px;
  align-items: center;
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
  padding: 24px 0 32px;
  color: #627481;
  font-size: 12px;
}

.foot-brand {
  display: flex;
  align-items: center;
  gap: 11px;
}

.foot-brand img {
  width: 40px;
  height: 40px;
  border-radius: 9px;
}

.foot-brand div {
  display: flex;
  flex-direction: column;
}

.foot-brand strong {
  color: var(--wifi-ink);
  font-size: 15px;
}

.signal-foot a:hover,
.policy-foot a:hover {
  color: var(--wifi-blue-deep);
}

.signal-foot > p {
  margin: 0;
  text-align: right;
}

.signal-foot > p a,
.policy-foot > p a {
  color: var(--wifi-blue-deep);
  font-weight: 700;
}

.policy-body {
  background: #f7fbfe;
}

.policy-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(1080px, calc(100% - 40px));
  min-height: 76px;
  margin: 0 auto;
  border-bottom: 1px solid var(--wifi-line);
}

.policy-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: #385267;
  font-size: 14px;
  font-weight: 700;
}

.policy-page {
  width: min(1080px, calc(100% - 40px));
  margin: 0 auto;
  padding: 34px 0 66px;
}

.policy-intro {
  position: relative;
  padding: 42px 46px;
  border: 1px solid #b9dcf5;
  background: #eaf7ff;
  overflow: hidden;
}

.policy-intro::after {
  position: absolute;
  right: -78px;
  bottom: -112px;
  width: 310px;
  height: 310px;
  border: 1px solid rgba(7, 146, 255, .25);
  border-radius: 50%;
  box-shadow: 0 0 0 52px rgba(7, 146, 255, .05), 0 0 0 104px rgba(7, 146, 255, .04);
  content: "";
}

.policy-intro > p:first-child {
  margin: 0 0 7px;
  color: var(--wifi-blue-deep);
  font-size: 12px;
  font-weight: 800;
}

.policy-intro h1 {
  margin: 0;
  font-size: clamp(36px, 5vw, 52px);
  line-height: 1.2;
}

.policy-intro > p:nth-of-type(2) {
  position: relative;
  z-index: 2;
  max-width: 720px;
  margin: 16px 0 20px;
  color: #4e687a;
}

.policy-intro > div {
  display: flex;
  gap: 18px;
  color: #6a7c88;
  font-size: 12px;
}

.policy-layout {
  display: grid;
  grid-template-columns: 210px minmax(0, 1fr);
  gap: 48px;
  align-items: start;
  margin-top: 42px;
}

.policy-index {
  position: sticky;
  top: 22px;
  display: flex;
  flex-direction: column;
  padding: 20px;
  border-top: 3px solid var(--wifi-blue);
  background: #fff;
  box-shadow: 0 8px 24px rgba(12, 56, 90, .06);
}

.policy-index strong {
  margin-bottom: 9px;
  font-size: 15px;
}

.policy-index a {
  padding: 7px 0;
  color: #5f7483;
  font-size: 13px;
}

.policy-index a:hover {
  color: var(--wifi-blue-deep);
}

.policy-content {
  min-width: 0;
}

.policy-content > section {
  position: relative;
  padding: 0 0 42px 50px;
  border-left: 1px solid #c8dfef;
}

.policy-content > section:last-child {
  padding-bottom: 0;
  border-left-color: transparent;
}

.policy-content > section > span:first-child {
  position: absolute;
  top: 0;
  left: -18px;
  display: grid;
  width: 36px;
  height: 36px;
  place-items: center;
  border: 1px solid #8fcaf3;
  border-radius: 50%;
  color: var(--wifi-blue-deep);
  background: #f7fbfe;
  font-size: 10px;
  font-weight: 800;
}

.policy-content h2 {
  margin: 0 0 14px;
  font-size: 26px;
  line-height: 1.35;
}

.policy-content p {
  margin: 0 0 14px;
  color: #536b7b;
}

.policy-highlight {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 12px;
  margin-top: 18px;
  padding: 16px 18px;
  border-left: 3px solid var(--wifi-blue);
  background: #eaf7ff;
}

.policy-highlight i {
  color: var(--wifi-blue);
  font-size: 24px;
}

.policy-highlight p {
  margin: 0;
}

.policy-highlight strong {
  display: block;
  color: var(--wifi-ink);
}

.policy-data-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  margin: 18px 0 0;
  border-top: 1px solid #bdd7e8;
  border-left: 1px solid #bdd7e8;
}

.policy-data-list div {
  padding: 17px;
  border-right: 1px solid #bdd7e8;
  border-bottom: 1px solid #bdd7e8;
  background: #fff;
}

.policy-data-list dt {
  margin-bottom: 5px;
  font-weight: 800;
}

.policy-data-list dd {
  margin: 0;
  color: #5b7180;
  font-size: 13px;
}

.permission-table {
  margin: 18px 0;
  border-top: 1px solid #b8d4e6;
  border-left: 1px solid #b8d4e6;
}

.permission-row {
  display: grid;
  grid-template-columns: .7fr 1.3fr 1.3fr;
}

.permission-row > * {
  margin: 0;
  padding: 13px 14px;
  border-right: 1px solid #b8d4e6;
  border-bottom: 1px solid #b8d4e6;
  background: #fff;
  font-size: 13px;
}

.permission-head > * {
  color: #fff;
  background: #0b78cd;
}

.policy-content ul {
  display: grid;
  gap: 9px;
  margin: 15px 0 0;
  padding-left: 22px;
  color: #536b7b;
}

.policy-foot {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
  align-items: center;
  width: min(1080px, calc(100% - 40px));
  margin: 0 auto;
  padding: 24px 0 34px;
  border-top: 1px solid var(--wifi-line);
  color: #627481;
  font-size: 12px;
}

.policy-foot > p {
  margin: 0;
  text-align: right;
}

.back-signal {
  position: fixed;
  z-index: 40;
  right: 22px;
  bottom: 22px;
  display: grid;
  width: 44px;
  height: 44px;
  place-items: center;
  border: 1px solid #8ac9f6;
  border-radius: 50%;
  color: white;
  background: var(--wifi-blue);
  box-shadow: 0 8px 22px rgba(7, 80, 134, .22);
  cursor: pointer;
  opacity: 0;
  pointer-events: none;
  transform: translateY(10px);
  transition: opacity .2s ease, transform .2s ease;
}

.back-signal.is-visible {
  opacity: 1;
  pointer-events: auto;
  transform: translateY(0);
}

@media (max-width: 1020px) {
  .signal-head {
    grid-template-columns: auto 1fr auto auto;
  }

  .signal-route {
    position: absolute;
    top: calc(100% + 9px);
    right: 0;
    left: 0;
    display: none;
    align-items: stretch;
    flex-direction: column;
    gap: 0;
    padding: 10px 18px 14px;
    border: 1px solid var(--wifi-line);
    border-radius: 10px;
    background: white;
    box-shadow: 0 18px 36px rgba(8, 44, 72, .13);
  }

  .signal-route.is-open {
    display: flex;
  }

  .signal-route a,
  .signal-route button {
    width: 100%;
    padding: 11px 0;
    text-align: left;
  }

  .signal-menu {
    display: block;
    grid-column: 3;
    margin-right: 7px;
  }

  .head-get {
    grid-column: 4;
  }

  .frequency-intro {
    grid-template-columns: minmax(0, 1.18fr) minmax(0, .82fr);
  }

  .orbit-ring-one {
    width: 450px;
    height: 450px;
  }

  .note-safe {
    left: -15px;
  }

  .note-check {
    right: -14px;
  }

  .local-vault {
    grid-template-columns: 1fr;
  }

  .data-path {
    min-height: 260px;
  }

  .ability-list > div {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .note-wall {
    grid-template-columns: repeat(2, 1fr);
  }

  .signal-foot {
    grid-template-columns: 1fr 1fr;
  }

}

@media (min-width: 761px) and (max-width: 1100px) {
  .frequency-intro {
    grid-template-columns: minmax(0, 1.18fr) minmax(0, .82fr);
  }

  .scene-route li:nth-child(2) article,
  .scene-route li:nth-child(4) article {
    transform: none;
  }
}

@media (min-width: 761px) and (max-width: 900px) {
  .frequency-intro {
    grid-template-columns: 1fr;
  }

  .intro-copy {
    max-width: 690px;
  }

  .signal-orbit {
    width: min(620px, 100%);
    height: 440px;
    margin: 20px auto 0;
  }
}

@media (max-width: 760px) {
  html {
    scroll-padding-top: 76px;
  }

  body {
    font-size: 15px;
  }

  .signal-head {
    width: calc(100% - 24px);
    min-height: 60px;
    margin-top: 8px;
    padding: 6px 7px 6px 10px;
    border-radius: 11px;
  }

  .signal-brand {
    gap: 7px;
    font-size: 16px;
  }

  .signal-brand img {
    width: 36px;
    height: 36px;
  }

  .head-get {
    padding: 9px 11px;
    font-size: 12px;
  }

  .signal-menu {
    font-size: 22px;
  }

  .frequency-intro {
    grid-template-columns: 1fr;
    width: calc(100% - 32px);
    min-height: 0;
    padding: 42px 0 28px;
  }

  .frequency-intro::before {
    top: 38%;
    right: -45vw;
    width: 130vw;
    height: 130vw;
  }

  .intro-copy h1 {
    font-size: clamp(23px, 6.7vw, 27px);
  }

  .intro-lead {
    margin-top: 14px;
    font-size: 14px;
  }

  .intro-actions {
    align-items: stretch;
    flex-direction: column;
    gap: 13px;
  }

  .solid-action {
    width: 100%;
  }

  .text-action {
    justify-content: center;
  }

  .signal-orbit {
    height: 360px;
    margin-top: 16px;
  }

  .orbit-ring-one {
    width: min(340px, 92vw);
    height: min(340px, 92vw);
  }

  .orbit-ring-two {
    width: min(270px, 72vw);
    height: min(270px, 72vw);
  }

  .orbit-ring-three {
    width: min(205px, 56vw);
    height: min(205px, 56vw);
  }

  .phone-proof {
    top: 4px;
    width: 190px;
  }

  .orbit-note,
  .signal-orbit figcaption {
    display: none;
  }

  .phone-proof {
    top: 24px;
    width: 220px;
    transform: translateX(-45%);
  }

  .orbit-note {
    min-width: 143px;
    padding: 8px 9px;
  }

  .orbit-note i {
    width: 30px;
    height: 30px;
    font-size: 17px;
  }

  .note-safe {
    top: 62px;
    left: -5px;
  }

  .note-check {
    right: -6px;
    bottom: 60px;
  }

  .signal-orbit figcaption {
    right: 0;
    bottom: 0;
  }

  .privacy-promise {
    grid-template-columns: 1fr;
    width: calc(100% - 32px);
  }

  .privacy-promise p + p {
    border-top: 1px solid var(--wifi-line);
    border-left: 0;
  }

  .day-network {
    grid-template-columns: 1fr;
    width: calc(100% - 32px);
    gap: 30px;
    padding: 50px 0;
  }

  .scene-intro {
    position: static;
  }

  .scene-intro h2,
  .screen-caption h2,
  .vault-copy h2,
  .ledger-title h2,
  .notes-heading h2,
  .question-aside h2,
  .final-copy h2 {
    font-size: 27px;
  }

  .scene-route::before {
    left: 42px;
  }

  .scene-route li {
    grid-template-columns: 20px 52px 1fr;
    gap: 8px;
    padding-bottom: 30px;
  }

  .scene-mark {
    width: 42px;
    height: 42px;
    margin-left: 1px;
    border-width: 5px;
    font-size: 18px;
  }

  .scene-number {
    font-size: 10px;
  }

  .scene-route article {
    padding: 14px;
  }

  .scene-route li:nth-child(2) article,
  .scene-route li:nth-child(4) article {
    transform: none;
  }

  .scene-route h3 {
    font-size: 17px;
  }

  .screen-current {
    grid-template-columns: 1fr;
    gap: 20px;
    padding: 48px 16px 42px;
  }

  .screen-track {
    grid-auto-columns: 72vw;
    padding-bottom: 28px;
  }

  .screen-sheet-a,
  .screen-sheet-b,
  .screen-sheet-c {
    transform: none;
  }

  .local-vault {
    width: calc(100% - 32px);
    gap: 32px;
    padding: 50px 0;
  }

  .data-path {
    grid-template-columns: 1fr;
    gap: 10px;
    min-height: 0;
    padding: 22px 22px 70px;
  }

  .path-arrow {
    transform: rotate(90deg);
    text-align: center;
  }

  .blocked-cloud {
    bottom: 16px;
  }

  .capability-ledger {
    width: calc(100% - 32px);
    padding: 48px 0;
  }

  .ledger-title {
    grid-template-columns: 70px 1fr;
  }

  .ledger-title > span {
    font-size: 50px;
  }

  .ability-promises {
    grid-template-columns: 1fr;
  }

  .ability-list {
    grid-template-columns: 1fr;
  }

  .ability-list > div,
  .ability-list > div:nth-child(odd),
  .ability-list > div:nth-child(even) {
    padding: 18px 0;
    border-right: 0;
  }

  .field-notes {
    padding: 48px 16px 56px;
  }

  .notes-heading {
    align-items: start;
    flex-direction: column;
    gap: 7px;
  }

  .notes-heading > p {
    order: 0;
  }

  .note-wall {
    grid-template-columns: 1fr;
  }

  .note-wide {
    grid-column: auto;
  }

  .user-note:nth-child(4),
  .user-note:nth-child(5) {
    transform: none;
  }

  .question-bank {
    grid-template-columns: 1fr;
    width: calc(100% - 32px);
    gap: 34px;
    padding: 52px 0;
  }

  .question-list summary {
    padding: 17px 0;
    font-size: 15px;
  }

  .question-list details p {
    margin-right: 0;
  }

  .final-scan {
    grid-template-columns: 1fr;
    width: calc(100% - 24px);
    gap: 26px;
    margin-bottom: 30px;
    padding: 38px 25px;
  }

  .qr-card {
    display: none;
  }

  .final-copy > a {
    justify-content: center;
    width: 100%;
  }

  .signal-foot {
    grid-template-columns: 1fr;
    width: calc(100% - 32px);
    gap: 18px;
  }

  .signal-foot > p {
    text-align: left;
  }

  .policy-head,
  .policy-page,
  .policy-foot {
    width: calc(100% - 32px);
  }

  .policy-head {
    min-height: 66px;
  }

  .policy-intro {
    padding: 30px 22px;
  }

  .policy-intro h1 {
    font-size: 32px;
  }

  .policy-intro > div {
    flex-direction: column;
    gap: 3px;
  }

  .policy-layout {
    grid-template-columns: 1fr;
    gap: 28px;
    margin-top: 30px;
  }

  .policy-index {
    position: static;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0 14px;
  }

  .policy-index strong {
    grid-column: 1 / -1;
  }

  .policy-content > section {
    padding: 0 0 38px 34px;
  }

  .policy-content h2 {
    font-size: 23px;
  }

  .policy-data-list {
    grid-template-columns: 1fr;
  }

  .permission-table,
  .permission-table .permission-row {
    display: block;
    border: 0;
  }

  .permission-head {
    display: none !important;
  }

  .permission-row {
    margin-bottom: 12px;
    border: 1px solid #b8d4e6 !important;
  }

  .permission-row > * {
    display: block;
    border: 0;
    border-bottom: 1px solid #d5e4ee;
  }

  .permission-row > *:last-child {
    border-bottom: 0;
  }

  .policy-foot {
    grid-template-columns: 1fr;
  }

  .policy-foot > p {
    text-align: left;
  }

  .back-signal {
    right: 13px;
    bottom: 13px;
  }
}

@media (max-width: 390px) {
  .head-get {
    display: none;
  }

  .signal-head {
    grid-template-columns: auto 1fr auto;
  }

  .signal-menu {
    grid-column: 3;
  }

  .phone-proof {
    width: 190px;
  }

  .note-safe {
    left: -12px;
  }

  .note-check {
    right: -12px;
  }

  .orbit-note {
    min-width: 132px;
  }

  .ability-list dt {
    font-size: 15px;
  }
}

@media (max-width: 340px) {
  .intro-copy h1 {
    font-size: 21px;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
  }
}