@charset "UTF-8";

:root {
  --navy: #071f3a;
  --navy-2: #0b2c50;
  --blue: #1689ee;
  --cyan: #39c7dc;
  --green: #26c78f;
  --yellow: #ffd45c;
  --paper: #f7fbff;
  --mist: #eaf4fb;
  --line: #c8dce9;
  --muted: #5c7185;
  --white: #ffffff;
  --danger: #f0795d;
  --header-height: 76px;
}

* {
  box-sizing: border-box;
}

html {
  width: 100%;
  max-width: 100%;
  overflow-x: hidden;
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
}

body {
  width: 100%;
  max-width: 100%;
  min-width: 320px;
  margin: 0;
  padding-top: var(--header-height);
  overflow-x: hidden;
  color: var(--navy);
  background: var(--paper);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.7;
  -webkit-text-size-adjust: 100%;
  text-rendering: optimizeLegibility;
}

body.menu-open {
  overflow: hidden;
}

button,
a,
input {
  font: inherit;
  -webkit-tap-highlight-color: transparent;
}

button,
a {
  touch-action: manipulation;
}

button {
  border: 0;
  cursor: pointer;
}

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

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

h1,
h2,
h3,
p,
dl,
dd,
figure,
ul {
  margin: 0;
}

ul {
  padding: 0;
  list-style: none;
}

[hidden] {
  display: none !important;
}

.page-shell {
  width: min(1200px, calc(100% - 40px));
  margin-right: auto;
  margin-left: auto;
}

.section-anchor {
  scroll-margin-top: var(--header-height);
}

.site-header {
  position: fixed;
  z-index: 1000;
  top: 0;
  right: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.98);
  backface-visibility: hidden;
  transform: translateZ(0);
}

.header-inner {
  display: flex;
  height: 100%;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
}

.brand {
  display: inline-flex;
  min-width: 190px;
  align-items: center;
  gap: 12px;
}

.brand img {
  width: 46px;
  height: 46px;
  flex: 0 0 46px;
  border: 1px solid var(--line);
  border-radius: 5px;
  object-fit: contain;
  background: var(--white);
}

.brand-copy {
  display: flex;
  min-width: 0;
  flex-direction: column;
  line-height: 1.25;
}

.brand-copy strong {
  overflow: hidden;
  font-size: 20px;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.brand-copy span {
  overflow: visible;
  margin-top: 4px;
  color: var(--muted);
  font-size: 12px;
  white-space: nowrap;
}

.site-nav {
  margin-left: auto;
}

.site-nav ul {
  display: flex;
  align-items: center;
  gap: 30px;
}

.site-nav a {
  position: relative;
  display: flex;
  height: var(--header-height);
  align-items: center;
  font-size: 14px;
  font-weight: 700;
  white-space: nowrap;
}

.site-nav a::after {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  height: 3px;
  background: var(--blue);
  content: "";
  opacity: 0;
}

.site-nav a:hover::after,
.site-nav a.is-active::after {
  opacity: 1;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
}

.header-download {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 0 20px;
  border: 1px solid var(--navy);
  border-radius: 5px;
  color: var(--white);
  background: var(--navy);
  font-size: 14px;
  font-weight: 700;
  white-space: nowrap;
}

.header-download:hover {
  border-color: var(--blue);
  background: var(--blue);
}

.mobile-download-text,
.menu-toggle {
  display: none;
}

.icon {
  display: inline-flex;
  width: 20px;
  height: 20px;
  flex: 0 0 20px;
  align-items: center;
  justify-content: center;
}

.icon::before {
  display: block;
  width: 100%;
  height: 100%;
  background-position: center;
  background-repeat: no-repeat;
  background-size: contain;
  content: "";
}

.icon-download::before { background-image: url("../icons/download.svg"); }
.icon-signal::before { background-image: url("../icons/signal.svg"); }
.icon-device::before { background-image: url("../icons/device.svg"); }
.icon-shield::before { background-image: url("../icons/shield.svg"); }
.icon-check::before { background-image: url("../icons/check.svg"); }
.icon-globe::before { background-image: url("../icons/globe.svg"); }
.icon-avatar::before { background-image: url("../icons/avatar.svg"); }
.icon-top::before { background-image: url("../icons/back-top.svg"); }

.hero {
  position: relative;
  min-height: 690px;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background-color: #f5fbff;
  background-image:
    linear-gradient(rgba(22, 137, 238, 0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(22, 137, 238, 0.07) 1px, transparent 1px);
  background-size: 42px 42px;
}

.hero::before,
.hero::after {
  position: absolute;
  border-radius: 50%;
  content: "";
  pointer-events: none;
}

.hero::before {
  top: -180px;
  right: -100px;
  width: 520px;
  height: 520px;
  border: 84px solid rgba(57, 199, 220, 0.12);
}

.hero::after {
  bottom: -210px;
  left: -160px;
  width: 430px;
  height: 430px;
  background: rgba(22, 137, 238, 0.08);
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  min-height: 690px;
  grid-template-columns: minmax(0, 0.88fr) minmax(520px, 1.12fr);
  align-items: center;
  gap: 70px;
  padding-top: 60px;
  padding-bottom: 60px;
}

.eyebrow,
.section-index,
.console-kicker,
.download-copy > p {
  color: var(--blue);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.hero-copy h1 {
  margin-top: 18px;
  font-size: clamp(64px, 7vw, 108px);
  line-height: 0.98;
  letter-spacing: -0.06em;
  white-space: nowrap;
}

.hero-slogan {
  margin-top: 26px;
  font-size: 32px;
  font-weight: 800;
  line-height: 1.35;
}

.hero-summary {
  max-width: 560px;
  margin-top: 20px;
  color: var(--muted);
  font-size: 16px;
}

.hero-features {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.hero-features > span {
  display: inline-flex;
  min-height: 44px;
  align-items: center;
  gap: 8px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 5px;
  background: var(--white);
  font-size: 14px;
  font-weight: 700;
}

.hero-download {
  display: flex;
  margin-top: 30px;
  align-items: flex-start;
  flex-direction: column;
  gap: 9px;
}

.hero-download > a {
  display: inline-flex;
  min-width: 230px;
  min-height: 56px;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border: 1px solid var(--blue);
  border-radius: 5px;
  color: var(--white);
  background: var(--blue);
  font-size: 16px;
  font-weight: 800;
}

.hero-download > a:hover {
  border-color: var(--navy);
  background: var(--navy);
}

.age-label {
  color: var(--muted);
  font-size: 12px;
}

.network-console {
  width: 100%;
  max-width: 620px;
  margin-left: auto;
  overflow: hidden;
  border: 1px solid #173b5b;
  border-radius: 5px;
  background: var(--white);
  box-shadow: 14px 14px 0 rgba(22, 137, 238, 0.1);
}

.console-head {
  display: flex;
  min-height: 106px;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 24px 28px;
  color: var(--white);
  background: var(--navy);
}

.console-head h2 {
  margin-top: 4px;
  font-size: 26px;
  line-height: 1.25;
}

.console-kicker {
  color: #7cd8f2;
  font-size: 12px;
}

.online-state {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: #b8efd7;
  font-size: 12px;
  font-weight: 700;
  white-space: nowrap;
}

.online-state i {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: #5ee5a8;
}

.console-tabs {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  border-bottom: 1px solid var(--line);
}

.console-tabs button {
  min-height: 54px;
  border-right: 1px solid var(--line);
  color: var(--navy);
  background: var(--white);
  font-size: 14px;
  font-weight: 800;
}

.console-tabs button:last-child {
  border-right: 0;
}

.console-tabs button.is-active {
  color: var(--white);
  background: var(--blue);
}

.console-body {
  min-height: 350px;
  padding: 26px 28px;
}

.network-name {
  display: flex;
  flex-direction: column;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--line);
}

.network-name span,
.panel-title span {
  color: var(--blue);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.network-name strong,
.panel-title strong {
  margin-top: 4px;
  font-size: 22px;
}

.network-name small {
  margin-top: 4px;
  color: var(--muted);
  font-size: 12px;
}

.signal-board {
  display: grid;
  grid-template-columns: 180px 1fr;
  align-items: center;
  gap: 26px;
  padding: 22px 0;
}

.signal-score {
  display: flex;
  min-height: 152px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  border: 1px solid var(--line);
  border-radius: 5px;
  background: var(--mist);
  text-align: center;
}

.signal-orbit {
  display: inline-flex;
  width: 54px;
  height: 54px;
  align-items: center;
  justify-content: center;
  margin-bottom: 8px;
  border: 1px solid #83c3f4;
  border-radius: 50%;
  background: var(--white);
}

.signal-score strong {
  font-size: 17px;
}

.signal-score small {
  color: var(--muted);
  font-size: 12px;
}

.signal-board dl {
  display: grid;
  gap: 0;
}

.signal-board dl > div {
  display: flex;
  min-height: 44px;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  border-bottom: 1px solid var(--line);
  font-size: 13px;
}

.signal-board dd {
  font-weight: 700;
}

.console-primary,
#next-diagnosis {
  width: 100%;
  min-height: 46px;
  border: 1px solid var(--blue);
  border-radius: 5px;
  color: var(--white);
  background: var(--blue);
  font-weight: 800;
}

.panel-title {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 15px;
}

.panel-title > div {
  display: flex;
  flex-direction: column;
}

.text-button {
  padding: 8px 10px;
  border: 1px solid var(--line);
  border-radius: 5px;
  color: var(--blue);
  background: var(--white);
  font-size: 12px;
  font-weight: 800;
}

.device-list {
  border-top: 1px solid var(--line);
}

.device-list li {
  display: grid;
  min-height: 74px;
  grid-template-columns: 34px 1fr auto;
  align-items: center;
  gap: 12px;
  border-bottom: 1px solid var(--line);
}

.device-list li > span {
  display: flex;
  flex-direction: column;
}

.device-list small {
  color: var(--muted);
  font-size: 12px;
}

.device-switch {
  position: relative;
  width: 44px;
  height: 24px;
  border: 1px solid var(--line);
  border-radius: 20px;
  background: #dfe9ef;
}

.device-switch span {
  position: absolute;
  top: 3px;
  left: 3px;
  width: 16px;
  height: 16px;
  border-radius: 50%;
  background: var(--white);
}

.device-switch.is-on {
  border-color: var(--green);
  background: var(--green);
}

.device-switch.is-on span {
  left: 23px;
}

.security-list {
  display: grid;
  gap: 10px;
}

.security-list button {
  display: grid;
  min-height: 72px;
  grid-template-columns: 34px 1fr;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  border: 1px solid var(--line);
  border-radius: 5px;
  color: var(--navy);
  background: var(--white);
  text-align: left;
}

.security-list button.is-checked {
  border-color: #80daba;
  background: #ecfbf5;
}

.security-list button span {
  display: flex;
  flex-direction: column;
}

.security-list small {
  color: var(--muted);
  font-size: 12px;
}

.console-foot {
  display: flex;
  min-height: 58px;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 0 28px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  background: #f2f7fa;
  font-size: 12px;
}

.console-foot button {
  padding: 8px 12px;
  border: 1px solid var(--navy);
  border-radius: 5px;
  color: var(--white);
  background: var(--navy);
  font-size: 12px;
  font-weight: 800;
}

.diagnosis,
.devices,
.screenshots,
.faq,
.reviews,
.download-section {
  padding: 100px 0;
}

.diagnosis,
.screenshots,
.reviews {
  background: var(--white);
}

.devices,
.faq {
  background: #eef7fb;
}

.section-heading {
  margin-bottom: 42px;
}

.section-heading h2 {
  margin-top: 9px;
  font-size: clamp(42px, 5vw, 68px);
  line-height: 1.08;
  letter-spacing: -0.04em;
}

.section-heading > p:last-child,
.split-heading > p {
  max-width: 500px;
  margin-top: 14px;
  color: var(--muted);
}

.split-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 40px;
}

.diagnosis-layout {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(420px, 1.1fr);
  border: 1px solid var(--navy);
}

.diagnosis-steps {
  display: grid;
  grid-template-rows: repeat(3, 1fr);
  border-right: 1px solid var(--navy);
}

.diagnosis-steps button {
  display: grid;
  min-height: 120px;
  grid-template-columns: 54px 1fr;
  grid-template-rows: auto auto;
  align-content: center;
  padding: 20px 24px;
  border-bottom: 1px solid var(--line);
  color: var(--navy);
  background: var(--white);
  text-align: left;
}

.diagnosis-steps button:last-child {
  border-bottom: 0;
}

.diagnosis-steps button.is-active {
  color: var(--white);
  background: var(--navy);
}

.diagnosis-steps button > span {
  grid-row: 1 / 3;
  color: var(--blue);
  font-size: 14px;
  font-weight: 900;
}

.diagnosis-steps button strong {
  font-size: 20px;
}

.diagnosis-steps button small {
  color: inherit;
  font-size: 12px;
  opacity: 0.72;
}

.diagnosis-detail {
  position: relative;
  display: flex;
  min-height: 360px;
  justify-content: center;
  flex-direction: column;
  padding: 54px;
  background: #f5fbff;
}

.detail-number {
  position: absolute;
  top: 28px;
  right: 32px;
  color: rgba(22, 137, 238, 0.15);
  font-size: 94px;
  font-weight: 900;
  line-height: 1;
}

.detail-label {
  color: var(--blue);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0.14em;
}

.diagnosis-detail h3 {
  position: relative;
  margin-top: 10px;
  font-size: 32px;
  line-height: 1.25;
}

.diagnosis-detail > p:not(.detail-label) {
  position: relative;
  max-width: 540px;
  margin-top: 16px;
  color: var(--muted);
}

.detail-meter {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 14px;
  margin-top: 34px;
  font-size: 12px;
}

.detail-meter > div {
  height: 8px;
  overflow: hidden;
  background: #d8e6ef;
}

.detail-meter i {
  display: block;
  width: 33%;
  height: 100%;
  background: var(--blue);
}

#next-diagnosis {
  width: 150px;
  margin-top: 22px;
}

.device-board {
  display: grid;
  grid-template-columns: 240px 1fr;
  border: 1px solid var(--navy);
  background: var(--white);
}

.device-filter {
  display: flex;
  flex-direction: column;
  background: var(--navy);
}

.device-filter button {
  min-height: 72px;
  padding: 0 24px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
  color: var(--white);
  background: transparent;
  text-align: left;
  font-weight: 800;
}

.device-filter button.is-active {
  color: var(--navy);
  background: var(--yellow);
}

.device-cards {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
}

.device-cards article {
  position: relative;
  display: grid;
  min-height: 250px;
  grid-template-rows: auto 1fr auto;
  padding: 28px;
  border-right: 1px solid var(--line);
}

.device-cards article:last-child {
  border-right: 0;
}

.device-cards article[hidden] {
  display: none;
}

.device-cards .icon {
  width: 54px;
  height: 54px;
  margin-top: 20px;
}

.device-number {
  color: var(--blue);
  font-size: 12px;
  font-weight: 900;
}

.device-cards h3 {
  font-size: 21px;
}

.device-cards p {
  color: var(--muted);
  font-size: 13px;
}

.status-tag {
  position: absolute;
  top: 24px;
  right: 24px;
  padding: 5px 8px;
  border-radius: 5px;
  color: #067450;
  background: #dff8ee;
  font-size: 12px;
  font-weight: 800;
}

.status-warn {
  color: #9a551f;
  background: #fff0dd;
}

.screenshot-track {
  display: grid;
  grid-template-columns: repeat(4, 250px);
  justify-content: space-between;
  gap: 24px;
}

.screenshot-track figure {
  width: 250px;
  overflow: hidden;
  border: 1px solid var(--navy);
  border-radius: 5px;
  background: var(--white);
}

.screenshot-image {
  display: flex;
  width: 250px;
  height: 450px;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: #f2f6f8;
}

.screenshot-image img {
  width: 100%;
  height: 100%;
  object-fit: contain;
  object-position: center;
}

.screenshot-track figcaption {
  display: grid;
  min-height: 98px;
  grid-template-columns: 36px 1fr;
  align-content: center;
  padding: 18px;
  border-top: 1px solid var(--line);
}

.screenshot-track figcaption span {
  grid-row: 1 / 3;
  color: var(--blue);
  font-size: 13px;
  font-weight: 900;
}

.screenshot-track figcaption strong {
  font-size: 17px;
}

.screenshot-track figcaption small {
  color: var(--muted);
  font-size: 12px;
}

.faq-list {
  border-top: 1px solid var(--navy);
}

.faq-item {
  border-bottom: 1px solid var(--line);
  background: var(--white);
}

.faq-item > button {
  display: grid;
  width: 100%;
  min-height: 76px;
  grid-template-columns: 54px 1fr 28px;
  align-items: center;
  padding: 0 24px;
  color: var(--navy);
  background: transparent;
  text-align: left;
}

.faq-item > button > span {
  color: var(--blue);
  font-size: 12px;
  font-weight: 900;
}

.faq-item > button > strong {
  font-size: 16px;
}

.faq-item > button > i:last-child {
  position: relative;
  display: block;
  width: 18px;
  height: 18px;
}

.faq-item > button > i:last-child::before,
.faq-item > button > i:last-child::after {
  position: absolute;
  top: 8px;
  left: 2px;
  width: 14px;
  height: 2px;
  background: var(--navy);
  content: "";
}

.faq-item > button > i:last-child::after {
  transform: rotate(90deg);
}

.faq-item > button[aria-expanded="true"] > i:last-child::after {
  transform: rotate(0deg);
}

.faq-answer {
  padding: 0 80px 24px;
  color: var(--muted);
}

.faq-answer a {
  color: var(--blue);
  text-decoration: underline;
}

.official-item {
  margin-top: 18px;
  border: 1px solid var(--navy);
  border-radius: 5px;
}

.official-item > button {
  grid-template-columns: 54px 1fr 28px;
}

.official-item .icon {
  width: 20px;
  height: 20px;
}

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

.review-grid article {
  display: flex;
  min-height: 276px;
  flex-direction: column;
  padding: 26px;
  border: 1px solid var(--line);
  border-top: 4px solid var(--blue);
  border-radius: 5px;
  background: var(--white);
}

.review-grid article:nth-child(even) {
  border-top-color: var(--cyan);
}

.review-grid header {
  display: grid;
  grid-template-columns: 42px 1fr auto;
  align-items: center;
  gap: 10px;
}

.review-grid .icon-avatar {
  width: 42px;
  height: 42px;
  padding: 10px;
  border-radius: 50%;
  background: var(--navy);
}

.review-grid header strong {
  font-size: 14px;
}

.review-grid header span {
  color: #f0ad22;
  font-size: 14px;
  letter-spacing: 0.06em;
}

.review-grid article > p {
  margin-top: 22px;
  color: #2e455a;
  font-size: 14px;
  line-height: 1.85;
}

.review-grid time {
  margin-top: auto;
  padding-top: 18px;
  color: var(--muted);
  font-size: 12px;
  text-align: right;
}

.download-section {
  color: var(--white);
  background: var(--navy);
}

.download-card {
  display: grid;
  min-height: 190px;
  grid-template-columns: 180px 1fr 260px;
  align-items: stretch;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.5);
  border-radius: 5px;
}

.download-number {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  color: var(--navy);
  background: var(--yellow);
}

.download-number strong {
  font-size: 58px;
  line-height: 1;
}

.download-number span {
  margin-top: 8px;
  font-size: 12px;
  font-weight: 900;
  letter-spacing: 0.16em;
}

.download-copy {
  display: flex;
  justify-content: center;
  flex-direction: column;
  padding: 30px 42px;
}

.download-copy > p {
  color: #7cd8f2;
}

.download-copy h2 {
  margin-top: 7px;
  font-size: 32px;
}

.download-copy > span {
  color: #b9c9d6;
  font-size: 13px;
}

.download-card > a {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  border-left: 1px solid rgba(255, 255, 255, 0.5);
  color: var(--navy);
  background: var(--cyan);
  font-size: 16px;
  font-weight: 900;
  text-align: center;
}

.download-card > a .icon-download::before {
  background-image: url("../icons/download-dark.svg");
}

.download-card > a:hover {
  background: var(--yellow);
}

.site-footer {
  color: var(--white);
  background: #051426;
}

.footer-main {
  display: flex;
  min-height: 142px;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
}

.footer-brand img {
  border-color: rgba(255, 255, 255, 0.3);
}

.footer-brand .brand-copy span {
  color: #9db1c2;
}

.footer-nav {
  display: flex;
  align-items: center;
  gap: 28px;
}

.footer-nav a {
  font-size: 13px;
}

.footer-nav a:hover {
  color: var(--cyan);
}

.footer-bottom {
  display: flex;
  min-height: 62px;
  align-items: center;
  justify-content: center;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  color: #9db1c2;
  font-size: 12px;
}

.back-top {
  position: fixed;
  z-index: 950;
  right: 24px;
  bottom: 24px;
  display: flex;
  width: 50px;
  height: 50px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--navy);
  border-radius: 50%;
  background: var(--blue);
  opacity: 0;
  pointer-events: none;
  visibility: hidden;
}

.back-top.is-visible {
  opacity: 1;
  pointer-events: auto;
  visibility: visible;
}

@media (max-width: 1120px) {
  .site-nav ul {
    gap: 18px;
  }

  .hero-grid {
    grid-template-columns: minmax(0, 0.85fr) minmax(480px, 1.15fr);
    gap: 36px;
  }

  .screenshot-track {
    overflow-x: auto;
    justify-content: start;
    padding-bottom: 10px;
    scroll-snap-type: x proximity;
    scrollbar-width: thin;
  }

  .screenshot-track figure {
    scroll-snap-align: start;
  }
}

@media (max-width: 900px) {
  .desktop-download-text {
    display: none;
  }

  .mobile-download-text {
    display: inline;
  }

  .site-nav {
    position: fixed;
    z-index: 990;
    top: var(--header-height);
    right: 0;
    left: 0;
    display: none;
    max-height: calc(100dvh - var(--header-height));
    overflow-y: auto;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    background: var(--white);
  }

  .site-nav.is-open {
    display: block;
  }

  .site-nav ul {
    display: block;
    width: min(100% - 32px, 1200px);
    margin: 0 auto;
  }

  .site-nav li {
    border-bottom: 1px solid var(--line);
  }

  .site-nav li:last-child {
    border-bottom: 0;
  }

  .site-nav a {
    height: 56px;
    justify-content: space-between;
  }

  .site-nav a::after {
    top: 15px;
    right: 0;
    bottom: auto;
    left: auto;
    width: 3px;
    height: 26px;
  }

  .menu-toggle {
    display: flex;
    width: 44px;
    height: 44px;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 5px;
    border: 1px solid var(--navy);
    border-radius: 5px;
    background: var(--white);
  }

  .menu-toggle span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--navy);
  }

  .menu-toggle[aria-expanded="true"] span:nth-child(1) {
    transform: translateY(7px) rotate(45deg);
  }

  .menu-toggle[aria-expanded="true"] span:nth-child(2) {
    opacity: 0;
  }

  .menu-toggle[aria-expanded="true"] span:nth-child(3) {
    transform: translateY(-7px) rotate(-45deg);
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 44px;
  }

  .hero-copy {
    text-align: center;
  }

  .hero-summary {
    margin-right: auto;
    margin-left: auto;
  }

  .hero-features,
  .hero-download {
    align-items: center;
    justify-content: center;
  }

  .network-console {
    margin-right: auto;
  }

  .diagnosis-layout {
    grid-template-columns: 1fr;
  }

  .diagnosis-steps {
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: none;
    border-right: 0;
    border-bottom: 1px solid var(--navy);
  }

  .diagnosis-steps button {
    min-height: 128px;
    grid-template-columns: 1fr;
    grid-template-rows: auto auto auto;
    border-right: 1px solid var(--line);
    border-bottom: 0;
    text-align: center;
  }

  .diagnosis-steps button > span {
    grid-row: auto;
  }

  .device-board {
    grid-template-columns: 1fr;
  }

  .device-filter {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
  }

  .device-filter button {
    min-height: 58px;
    border-right: 1px solid rgba(255, 255, 255, 0.14);
    border-bottom: 0;
    text-align: center;
  }

  .device-cards article {
    min-height: 220px;
  }

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

  .download-card {
    grid-template-columns: 150px 1fr;
  }

  .download-card > a {
    min-height: 72px;
    grid-column: 1 / 3;
    border-top: 1px solid rgba(255, 255, 255, 0.5);
    border-left: 0;
  }
}

@media (max-width: 640px) {
  :root {
    --header-height: 66px;
  }

  body {
    font-size: 15px;
  }

  .page-shell {
    width: calc(100% - 28px);
  }

  .brand {
    min-width: 0;
    gap: 8px;
  }

  .brand img {
    width: 38px;
    height: 38px;
    flex-basis: 38px;
  }

  .brand-copy strong {
    max-width: 118px;
    font-size: 16px;
  }

  .brand-copy span {
    max-width: none;
    font-size: 12px;
    text-overflow: clip;
  }

  .header-actions {
    gap: 7px;
  }

  .header-download {
    min-height: 42px;
    padding: 0 12px;
    font-size: 12px;
  }

  .header-download .icon {
    display: none;
  }

  .menu-toggle {
    width: 42px;
    height: 42px;
  }

  .hero {
    min-height: 0;
  }

  .hero-grid {
    min-height: 0;
    gap: 36px;
    padding-top: 58px;
    padding-bottom: 54px;
  }

  .hero-copy h1 {
    margin-top: 14px;
    font-size: clamp(52px, 18vw, 78px);
    white-space: normal;
  }

  .hero-slogan {
    margin-top: 20px;
    font-size: 26px;
  }

  .hero-summary {
    margin-top: 16px;
    font-size: 14px;
  }

  .hero-features {
    display: grid;
    width: 100%;
    grid-template-columns: repeat(3, 1fr);
    gap: 6px;
    margin-top: 22px;
  }

  .hero-features > span {
    min-width: 0;
    min-height: 72px;
    justify-content: center;
    flex-direction: column;
    padding: 8px 4px;
    font-size: 12px;
  }

  .hero-download {
    width: 100%;
    margin-top: 22px;
  }

  .hero-download > a {
    width: 100%;
  }

  .network-console {
    width: 100%;
    box-shadow: none;
  }

  .console-head {
    min-height: 88px;
    padding: 18px;
  }

  .console-head h2 {
    font-size: 21px;
  }

  .console-tabs button {
    min-height: 50px;
    padding: 0 4px;
    font-size: 12px;
  }

  .console-body {
    min-height: 0;
    padding: 18px;
  }

  .signal-board {
    grid-template-columns: 1fr;
    gap: 14px;
  }

  .signal-score {
    min-height: 124px;
  }

  .console-foot {
    align-items: flex-start;
    flex-direction: column;
    padding: 14px 18px;
  }

  .console-foot button {
    width: 100%;
  }

  .diagnosis,
  .devices,
  .screenshots,
  .faq,
  .reviews,
  .download-section {
    padding: 68px 0;
  }

  .section-heading {
    margin-bottom: 28px;
  }

  .section-heading h2 {
    font-size: 42px;
  }

  .split-heading {
    display: block;
  }

  .diagnosis-steps {
    grid-template-columns: 1fr;
  }

  .diagnosis-steps button {
    min-height: 90px;
    grid-template-columns: 44px 1fr;
    grid-template-rows: auto auto;
    border-right: 0;
    border-bottom: 1px solid var(--line);
    text-align: left;
  }

  .diagnosis-steps button > span {
    grid-row: 1 / 3;
  }

  .diagnosis-detail {
    min-height: 340px;
    padding: 34px 24px;
  }

  .detail-number {
    top: 20px;
    right: 20px;
    font-size: 72px;
  }

  .diagnosis-detail h3 {
    font-size: 27px;
  }

  .device-filter button {
    min-height: 52px;
    padding: 0 4px;
    font-size: 12px;
  }

  .device-cards {
    grid-template-columns: 1fr;
  }

  .device-cards article {
    min-height: 170px;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .screenshot-track {
    display: flex;
    width: calc(100vw - 14px);
    margin-right: -14px;
    gap: 12px;
    overflow-x: auto;
    padding-right: 14px;
    padding-bottom: 12px;
    overscroll-behavior-inline: contain;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
  }

  .screenshot-track figure {
    flex: 0 0 250px;
    scroll-snap-align: start;
  }

  .faq-item > button {
    min-height: 70px;
    grid-template-columns: 36px 1fr 22px;
    padding: 0 14px;
  }

  .faq-item > button > strong {
    font-size: 14px;
  }

  .faq-answer {
    padding: 0 50px 20px;
    font-size: 13px;
  }

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

  .review-grid article {
    min-height: 0;
  }

  .review-grid header {
    grid-template-columns: 38px 1fr auto;
  }

  .review-grid .icon-avatar {
    width: 38px;
    height: 38px;
  }

  .download-card {
    grid-template-columns: 1fr;
  }

  .download-number {
    min-height: 126px;
  }

  .download-copy {
    padding: 28px 22px;
    text-align: center;
  }

  .download-copy h2 {
    font-size: 27px;
  }

  .download-card > a {
    min-height: 64px;
    grid-column: auto;
  }

  .footer-main {
    min-height: 210px;
    justify-content: center;
    flex-direction: column;
    text-align: center;
  }

  .footer-brand {
    justify-content: center;
  }

  .footer-brand .brand-copy {
    text-align: left;
  }

  .footer-nav {
    flex-wrap: wrap;
    justify-content: center;
    gap: 14px 22px;
  }

  .back-top {
    right: 14px;
    bottom: 14px;
    width: 46px;
    height: 46px;
  }
}

@media (max-width: 390px) {
  .brand-copy strong {
    max-width: 94px;
  }

  .brand-copy span {
    max-width: 112px;
    font-size: 12px;
  }

  .header-download {
    padding: 0 10px;
  }

  .hero-features > span {
    font-size: 12px;
  }
}