:root {
  --paper: #f7f1e5;
  --paper-deep: #eadfc9;
  --surface: #fffdf8;
  --ink: #1c2740;
  --muted: #6e7481;
  --line: rgba(28, 39, 64, 0.13);
  --blue: #245dc1;
  --blue-dark: #173c7e;
  --blue-soft: #d7e4fb;
  --orange: #e9893c;
  --orange-soft: #f5c99f;
  --cream: #f2dfae;
  --red: #c8564f;
  --green: #3c8b72;
  --container: 1180px;
  --radius-lg: 34px;
  --radius-md: 20px;
  --shadow-lg: 0 34px 90px rgba(41, 52, 83, 0.16);
  --shadow-md: 0 18px 50px rgba(41, 52, 83, 0.08);
  --header-height: 76px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  overflow-x: hidden;
  color: var(--ink);
  background: var(--paper);
  font-family: Arial, "Microsoft YaHei", "PingFang SC", sans-serif;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

body.nav-open {
  overflow: hidden;
}

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

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

button,
input {
  font: inherit;
}

button {
  color: inherit;
}

.container {
  width: min(calc(100% - 40px), var(--container));
  margin-inline: auto;
}

.section {
  padding: 108px 0;
}

.skip-link {
  position: fixed;
  top: 12px;
  left: 12px;
  z-index: 9999;
  padding: 11px 16px;
  color: #fff;
  background: #000;
  border-radius: 8px;
  transform: translateY(-150%);
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  height: var(--header-height);
  background: rgba(255, 253, 248, 0.92);
  border-bottom: 1px solid rgba(28, 39, 64, 0.08);
  backdrop-filter: blur(16px);
  transition: background 180ms ease, box-shadow 180ms ease;
}

.site-header.is-scrolled {
  background: rgba(255, 253, 248, 0.98);
  box-shadow: 0 13px 36px rgba(41, 52, 83, 0.08);
}

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  gap: 25px;
}

.brand {
  min-width: 260px;
  display: flex;
  align-items: center;
  gap: 14px;
}

.brand img {
  width: 104px;
  height: 42px;
  object-fit: contain;
}

.brand > span {
  padding-left: 14px;
  display: flex;
  flex-direction: column;
  border-left: 1px solid var(--line);
  line-height: 1.2;
}

.brand strong {
  color: var(--blue);
  font-size: 10px;
  letter-spacing: 0.11em;
}

.brand small {
  margin-top: 5px;
  color: var(--muted);
  font-size: 10px;
}

.site-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 23px;
}

.site-nav a {
  position: relative;
  color: #50586a;
  font-size: 12px;
  font-weight: 700;
}

.site-nav a::after {
  position: absolute;
  right: 0;
  bottom: -8px;
  left: 0;
  height: 2px;
  content: "";
  background: var(--orange);
  transform: scaleX(0);
  transform-origin: center;
  transition: transform 180ms ease;
}

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

.header-cta {
  padding: 11px 18px;
  color: #fff;
  background: var(--blue-dark);
  border-radius: 999px;
  font-size: 11px;
  font-weight: 900;
  transition: transform 180ms ease, background 180ms ease;
}

.header-cta:hover,
.header-cta:focus-visible {
  background: var(--blue);
  transform: translateY(-2px);
}

.nav-toggle {
  width: 46px;
  height: 42px;
  margin-left: auto;
  padding: 0;
  display: none;
  place-content: center;
  gap: 5px;
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 12px;
  cursor: pointer;
}

.nav-toggle span {
  width: 21px;
  height: 2px;
  display: block;
  background: var(--ink);
  transition: transform 180ms ease, opacity 180ms ease;
}

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

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

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

.hero {
  position: relative;
  overflow: hidden;
  background:
    radial-gradient(circle at 77% 16%, rgba(36, 93, 193, 0.12), transparent 31%),
    linear-gradient(145deg, #fbf7ef 0%, #f2e8d6 100%);
}

.hero-paper {
  position: absolute;
  inset: 0;
  opacity: 0.42;
  background-image:
    linear-gradient(rgba(28, 39, 64, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(28, 39, 64, 0.04) 1px, transparent 1px);
  background-size: 74px 74px;
  mask-image: linear-gradient(to bottom, #000, transparent 89%);
}

.hero-inner {
  position: relative;
  z-index: 1;
  min-height: 760px;
  padding-top: 82px;
  padding-bottom: 112px;
  display: grid;
  grid-template-columns: 0.92fr 1.08fr;
  align-items: center;
  gap: 80px;
}

.hero-kicker {
  margin-bottom: 22px;
  display: inline-block;
  color: var(--blue);
  font-size: 10px;
  font-weight: 900;
  letter-spacing: 0.16em;
}

.hero h1 {
  max-width: 740px;
  margin: 0;
  color: var(--ink);
  font-size: clamp(48px, 5.4vw, 77px);
  line-height: 1.04;
  letter-spacing: -0.05em;
}

.hero h1 span {
  margin-top: 16px;
  display: block;
  color: var(--orange);
  font-size: clamp(24px, 2.9vw, 39px);
  font-weight: 600;
  line-height: 1.25;
  letter-spacing: -0.035em;
}

.hero-title > p {
  max-width: 700px;
  margin: 27px 0 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.95;
}

.hero-actions {
  margin-top: 33px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.primary-cta {
  min-width: 282px;
  min-height: 68px;
  padding: 10px 17px;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  color: #fff;
  background: var(--blue-dark);
  border-radius: 18px;
  box-shadow: 0 20px 45px rgba(23, 60, 126, 0.18);
  transition: transform 180ms ease, background 180ms ease;
}

.primary-cta:hover,
.primary-cta:focus-visible {
  background: var(--blue);
  transform: translateY(-4px);
}

.primary-cta > span {
  display: flex;
  flex-direction: column;
}

.primary-cta small {
  color: var(--blue-soft);
  font-size: 8px;
  font-weight: 900;
  letter-spacing: 0.12em;
}

.primary-cta strong {
  margin-top: 4px;
  font-size: 13px;
}

.primary-cta i {
  font-style: normal;
  font-size: 19px;
}

.secondary-cta {
  color: var(--blue-dark);
  font-size: 11px;
  font-weight: 900;
  border-bottom: 1px solid rgba(36, 93, 193, 0.45);
}

.hero-visual {
  display: grid;
  place-items: center;
}

.guide-poster {
  width: min(100%, 520px);
  padding: 19px;
  background: var(--surface);
  border: 1px solid rgba(28, 39, 64, 0.1);
  border-radius: 40px;
  box-shadow: var(--shadow-lg);
  transform: rotate(-1deg);
}

.guide-poster__top {
  min-height: 45px;
  padding: 0 8px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  color: var(--muted);
  font-size: 9px;
  font-weight: 900;
  letter-spacing: 0.13em;
}

.guide-poster__top span {
  color: var(--blue);
}

.guide-poster__image {
  min-height: 320px;
  display: grid;
  place-items: center;
  overflow: hidden;
  background:
    radial-gradient(circle at center, rgba(36, 93, 193, 0.12), transparent 58%),
    #f2eee7;
  border: 1px solid rgba(28, 39, 64, 0.08);
  border-radius: 28px;
}

.guide-poster__image img {
  width: 92%;
  max-height: 330px;
  object-fit: contain;
}

.guide-poster__route {
  margin-top: 13px;
  padding: 13px;
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr;
  align-items: center;
  gap: 8px;
  background: #f5efe5;
  border-radius: 16px;
}

.guide-poster__route > div {
  display: flex;
  flex-direction: column;
  align-items: center;
}

.guide-poster__route span {
  width: 29px;
  height: 29px;
  display: grid;
  place-items: center;
  color: #fff;
  background: var(--blue);
  border-radius: 9px;
  font-size: 8px;
  font-weight: 900;
}

.guide-poster__route strong {
  margin-top: 5px;
  font-size: 8px;
}

.guide-poster__route i {
  color: var(--orange);
  font-style: normal;
}

.guide-poster__footer {
  min-height: 52px;
  padding: 0 8px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  color: var(--muted);
  font-size: 8px;
}

.guide-poster__footer strong {
  color: var(--orange);
}

.hero-steps {
  position: relative;
  z-index: 3;
  margin-bottom: -43px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  overflow: hidden;
  background: var(--blue-dark);
  border-radius: 22px;
  box-shadow: 0 24px 65px rgba(23, 60, 126, 0.2);
}

.hero-steps article {
  min-height: 90px;
  padding: 17px 20px;
  display: flex;
  flex-direction: column;
  color: #fff;
  border-right: 1px solid rgba(255, 255, 255, 0.09);
}

.hero-steps article:last-child {
  border-right: 0;
}

.hero-steps span {
  color: var(--orange-soft);
  font-size: 8px;
  font-weight: 900;
  letter-spacing: 0.12em;
}

.hero-steps strong {
  margin-top: 6px;
  font-size: 11px;
}

.hero-steps small {
  margin-top: 3px;
  color: rgba(255, 255, 255, 0.5);
  font-size: 8px;
}

.section-heading {
  max-width: 760px;
  margin-bottom: 44px;
}

.section-heading--center {
  margin-inline: auto;
  text-align: center;
}

.section-heading--split {
  max-width: none;
  display: grid;
  grid-template-columns: 1fr 0.72fr;
  align-items: end;
  gap: 75px;
}

.section-kicker {
  margin-bottom: 12px;
  display: inline-block;
  color: var(--blue);
  font-size: 9px;
  font-weight: 900;
  letter-spacing: 0.16em;
}

.section-heading h2,
.prepare-intro h2,
.permission-layout h2,
.faq-copy h2 {
  margin: 0;
  font-size: clamp(34px, 4.2vw, 53px);
  line-height: 1.15;
  letter-spacing: -0.04em;
}

.section-heading p,
.prepare-intro > p,
.permission-layout > div:first-child > p,
.faq-copy > p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.95;
}

.section-heading:not(.section-heading--split) p,
.prepare-intro > p,
.permission-layout > div:first-child > p,
.faq-copy > p {
  margin-top: 17px;
}

.choose-section {
  padding-top: 145px;
  background: var(--paper);
}

.device-switch {
  display: grid;
  grid-template-columns: 330px 1fr;
  overflow: hidden;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 26px;
  box-shadow: var(--shadow-md);
}

.device-switch__buttons {
  padding: 18px;
  display: grid;
  gap: 10px;
  background: var(--blue-dark);
}

.device-switch__buttons button {
  min-height: 145px;
  padding: 21px;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  color: rgba(255, 255, 255, 0.62);
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 17px;
  cursor: pointer;
  text-align: left;
}

.device-switch__buttons button:hover,
.device-switch__buttons button.is-active {
  color: var(--ink);
  background: var(--cream);
}

.device-switch__buttons span {
  font-size: 8px;
  font-weight: 900;
  letter-spacing: 0.12em;
}

.device-switch__buttons strong {
  margin-top: 13px;
  font-size: 16px;
}

.device-switch__buttons small {
  margin-top: 6px;
  font-size: 9px;
}

.device-switch__panels {
  padding: 40px;
}

.device-switch__panels article {
  min-height: 380px;
  display: grid;
  grid-template-columns: 90px 1fr;
  gap: 28px;
}

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

.device-panel__number {
  width: 74px;
  height: 74px;
  display: grid;
  place-items: center;
  color: #fff;
  background: var(--orange);
  border-radius: 22px;
  font-size: 24px;
  font-weight: 900;
}

.device-switch__panels article > div:last-child > span {
  color: var(--blue);
  font-size: 8px;
  font-weight: 900;
  letter-spacing: 0.13em;
}

.device-switch__panels h3 {
  margin: 13px 0 0;
  font-size: 30px;
  line-height: 1.2;
}

.device-switch__panels p {
  margin: 15px 0 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.95;
}

.device-switch__panels ul {
  margin: 24px 0 0;
  padding: 20px 0 0;
  display: grid;
  gap: 9px;
  list-style: none;
  border-top: 1px solid var(--line);
}

.device-switch__panels li {
  position: relative;
  padding-left: 21px;
  color: #4f596d;
  font-size: 10px;
}

.device-switch__panels li::before {
  position: absolute;
  top: 0.67em;
  left: 0;
  width: 8px;
  height: 8px;
  content: "";
  background: var(--orange);
  border-radius: 50%;
  transform: translateY(-50%);
}

.device-switch__panels a {
  margin-top: 24px;
  display: inline-flex;
  color: var(--blue-dark);
  font-size: 10px;
  font-weight: 900;
  border-bottom: 1px solid var(--blue);
}

.prepare-section {
  color: #fff;
  background:
    radial-gradient(circle at 17% 18%, rgba(233, 137, 60, 0.14), transparent 30%),
    var(--blue-dark);
}

.prepare-layout {
  display: grid;
  grid-template-columns: 0.72fr 1.28fr;
  align-items: center;
  gap: 78px;
}

.prepare-intro > p {
  color: rgba(255, 255, 255, 0.58);
}

.prepare-score {
  margin-top: 31px;
  padding: 21px;
  background: rgba(255, 255, 255, 0.055);
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 18px;
}

.prepare-score > span {
  color: rgba(255, 255, 255, 0.56);
  font-size: 9px;
}

.prepare-score > strong {
  float: right;
  color: var(--orange-soft);
  font-size: 10px;
}

.prepare-score i {
  font-style: normal;
}

.progress-track {
  height: 8px;
  margin-top: 13px;
  overflow: hidden;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 999px;
}

.progress-track span {
  width: 0;
  height: 100%;
  display: block;
  background: linear-gradient(90deg, var(--orange), var(--orange-soft));
  border-radius: inherit;
  transition: width 240ms ease;
}

.prepare-score p {
  margin: 10px 0 0;
  color: rgba(255, 255, 255, 0.48);
  font-size: 9px;
}

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

.prepare-grid label {
  min-height: 150px;
  position: relative;
  padding: 20px;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: start;
  gap: 14px;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.09);
  border-radius: 18px;
  cursor: pointer;
}

.prepare-grid label:has(input:checked) {
  background: rgba(233, 137, 60, 0.11);
  border-color: rgba(233, 137, 60, 0.5);
}

.prepare-grid input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.prepare-icon {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  color: var(--blue-dark);
  background: var(--orange-soft);
  border-radius: 12px;
  font-size: 9px;
  font-weight: 900;
}

.prepare-copy {
  display: flex;
  flex-direction: column;
}

.prepare-copy small {
  color: var(--orange-soft);
  font-size: 8px;
  font-weight: 900;
  letter-spacing: 0.11em;
}

.prepare-copy strong {
  margin-top: 5px;
  font-size: 12px;
}

.prepare-copy p {
  margin: 5px 0 0;
  color: rgba(255, 255, 255, 0.5);
  font-size: 9px;
}

.prepare-mark {
  width: 28px;
  height: 28px;
  position: relative;
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 50%;
}

.prepare-grid input:checked ~ .prepare-mark {
  background: var(--orange);
  border-color: var(--orange);
}

.prepare-grid input:checked ~ .prepare-mark::after {
  position: absolute;
  top: 7px;
  left: 7px;
  width: 9px;
  height: 5px;
  content: "";
  border-bottom: 2px solid #fff;
  border-left: 2px solid #fff;
  transform: rotate(-45deg);
}

.steps-section {
  background: var(--surface);
}

.runway {
  overflow: hidden;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 27px;
  box-shadow: var(--shadow-md);
}

.runway-nav {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  background: var(--ink);
}

.runway-nav button {
  min-height: 94px;
  padding: 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  color: rgba(255, 255, 255, 0.55);
  background: transparent;
  border: 0;
  border-right: 1px solid rgba(255, 255, 255, 0.08);
  cursor: pointer;
}

.runway-nav button:last-child {
  border-right: 0;
}

.runway-nav button:hover,
.runway-nav button[aria-selected="true"] {
  color: var(--ink);
  background: var(--cream);
}

.runway-nav button > span {
  width: 36px;
  height: 36px;
  display: grid;
  place-items: center;
  color: inherit;
  background: rgba(255, 255, 255, 0.12);
  border-radius: 11px;
  font-size: 9px;
  font-weight: 900;
}

.runway-nav strong {
  font-size: 11px;
}

.runway-panels {
  background: var(--surface);
}

.runway-panels article {
  min-height: 390px;
  padding: 43px;
}

.runway-panels article[hidden] {
  display: none;
}

.runway-panels article > span {
  color: var(--orange);
  font-size: 8px;
  font-weight: 900;
  letter-spacing: 0.14em;
}

.runway-panels h3 {
  margin: 13px 0 0;
  font-size: 31px;
  line-height: 1.2;
}

.runway-panels p {
  max-width: 760px;
  margin: 15px 0 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.95;
}

.runway-panels ul {
  margin: 26px 0 0;
  padding: 21px 0 0;
  display: grid;
  gap: 9px;
  list-style: none;
  border-top: 1px solid var(--line);
}

.runway-panels li {
  position: relative;
  padding-left: 21px;
  color: #4f596d;
  font-size: 10px;
}

.runway-panels li::before {
  position: absolute;
  top: 0.66em;
  left: 0;
  width: 8px;
  height: 8px;
  content: "";
  background: var(--blue);
  border-radius: 2px;
  transform: translateY(-50%);
}

.runway-controls {
  min-height: 70px;
  padding: 12px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  background: #f5efe5;
  border-top: 1px solid var(--line);
}

.runway-controls button {
  padding: 10px 16px;
  color: var(--ink);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 999px;
  cursor: pointer;
}

.runway-controls button:hover:not(:disabled) {
  color: #fff;
  background: var(--blue);
  border-color: var(--blue);
}

.runway-controls button:disabled {
  cursor: not-allowed;
  opacity: 0.35;
}

.runway-controls span {
  color: var(--muted);
  font-size: 10px;
}

.runway-controls i {
  color: var(--orange);
  font-style: normal;
  font-weight: 900;
}

.permission-section {
  background: var(--paper-deep);
}

.permission-layout {
  display: grid;
  grid-template-columns: 0.68fr 1.32fr;
  align-items: center;
  gap: 72px;
}

.permission-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 13px;
}

.permission-grid article {
  min-height: 175px;
  padding: 22px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 19px;
}

.permission-grid article > span {
  color: var(--orange);
  font-size: 8px;
  font-weight: 900;
  letter-spacing: 0.13em;
}

.permission-grid strong {
  margin-top: 10px;
  display: block;
  font-size: 15px;
}

.permission-grid p {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 10px;
  line-height: 1.85;
}

.check-section {
  background: var(--surface);
}

.final-check-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 13px;
}

.final-check-grid article {
  min-height: 220px;
  padding: 23px;
  background: var(--paper);
  border: 1px solid var(--line);
  border-radius: 20px;
}

.final-check-grid span {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  color: #fff;
  background: var(--blue);
  border-radius: 13px;
  font-size: 9px;
  font-weight: 900;
}

.final-check-grid strong {
  margin-top: 24px;
  display: block;
  font-size: 15px;
}

.final-check-grid p {
  margin: 8px 0 0;
  color: var(--muted);
  font-size: 10px;
  line-height: 1.85;
}

.check-actions {
  margin-top: 16px;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.check-actions a {
  padding: 19px 21px;
  display: flex;
  flex-direction: column;
  background: #edf2fb;
  border: 1px solid var(--line);
  border-radius: 17px;
  transition: transform 180ms ease, border-color 180ms ease;
}

.check-actions a:hover,
.check-actions a:focus-visible {
  border-color: rgba(36, 93, 193, 0.48);
  transform: translateY(-4px);
}

.check-actions span {
  color: var(--muted);
  font-size: 9px;
}

.check-actions strong {
  margin-top: 4px;
  font-size: 11px;
}

.faq-section {
  background: var(--paper);
}

.faq-layout {
  display: grid;
  grid-template-columns: 0.7fr 1.3fr;
  align-items: start;
  gap: 86px;
}

.faq-copy {
  position: sticky;
  top: calc(var(--header-height) + 32px);
}

.faq-download {
  margin-top: 27px;
  padding: 11px 17px;
  display: inline-flex;
  color: #fff;
  background: var(--blue-dark);
  border-radius: 999px;
  font-size: 10px;
  font-weight: 900;
}

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

.faq-list details {
  border-bottom: 1px solid var(--line);
}

.faq-list summary {
  min-height: 83px;
  padding: 20px 2px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  list-style: none;
  cursor: pointer;
  font-size: 14px;
  font-weight: 800;
}

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

.faq-list summary i {
  width: 31px;
  height: 31px;
  position: relative;
  flex: 0 0 auto;
  border: 1px solid var(--line);
  border-radius: 50%;
}

.faq-list summary i::before,
.faq-list summary i::after {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 11px;
  height: 1px;
  content: "";
  background: var(--ink);
  transform: translate(-50%, -50%);
}

.faq-list summary i::after {
  transform: translate(-50%, -50%) rotate(90deg);
  transition: transform 180ms ease;
}

.faq-list details[open] summary i {
  background: var(--orange-soft);
  border-color: var(--orange-soft);
}

.faq-list details[open] summary i::after {
  transform: translate(-50%, -50%) rotate(0);
}

.faq-list details > div {
  padding: 0 52px 24px 2px;
}

.faq-list p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.95;
}

.final-cta {
  padding: 77px 0;
  color: #fff;
  background:
    radial-gradient(circle at 84% 18%, rgba(233, 137, 60, 0.15), transparent 33%),
    var(--ink);
}

.final-cta__inner {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: 55px;
}

.final-cta__inner > div > span {
  color: var(--orange-soft);
  font-size: 8px;
  font-weight: 900;
  letter-spacing: 0.15em;
}

.final-cta h2 {
  max-width: 760px;
  margin: 10px 0 0;
  font-size: clamp(31px, 4.2vw, 49px);
  line-height: 1.17;
  letter-spacing: -0.04em;
}

.final-cta p {
  max-width: 670px;
  margin: 13px 0 0;
  color: rgba(255, 255, 255, 0.57);
  font-size: 11px;
}

.final-cta__inner > a {
  min-width: 255px;
  min-height: 74px;
  padding: 13px 17px;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  color: var(--ink);
  background: var(--orange-soft);
  border-radius: 18px;
  transition: transform 180ms ease, background 180ms ease;
}

.final-cta__inner > a:hover,
.final-cta__inner > a:focus-visible {
  background: #ffe0c0;
  transform: translateX(5px);
}

.final-cta__inner > a span,
.final-cta__inner > a strong {
  grid-column: 1;
}

.final-cta__inner > a span {
  font-size: 8px;
  font-weight: 900;
  letter-spacing: 0.12em;
}

.final-cta__inner > a strong {
  margin-top: 3px;
  font-size: 13px;
}

.final-cta__inner > a i {
  grid-column: 2;
  grid-row: 1 / 3;
  font-style: normal;
  font-size: 20px;
}

.site-footer {
  color: rgba(255, 255, 255, 0.62);
  background: #111827;
}

.footer-main {
  padding-top: 64px;
  padding-bottom: 50px;
  display: grid;
  grid-template-columns: 1.3fr 0.7fr 0.7fr 1fr;
  gap: 46px;
}

.footer-brand img {
  width: 120px;
  height: 46px;
  object-fit: contain;
  object-position: left center;
  filter: brightness(1.12);
}

.footer-brand p {
  max-width: 330px;
  margin: 17px 0 0;
  font-size: 10px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 9px;
}

.footer-links strong {
  margin-bottom: 5px;
  color: #fff;
  font-size: 10px;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.5);
  font-size: 9px;
}

.footer-links a:hover {
  color: var(--orange-soft);
}

.footer-action {
  padding: 18px;
  display: flex;
  flex-direction: column;
  background: rgba(255, 255, 255, 0.045);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 17px;
}

.footer-action span {
  color: var(--orange-soft);
  font-size: 8px;
  font-weight: 900;
  letter-spacing: 0.11em;
}

.footer-action strong {
  margin-top: 6px;
  color: #fff;
  font-size: 11px;
}

.footer-action a {
  margin-top: 12px;
  color: var(--blue-soft);
  font-size: 9px;
  font-weight: 900;
}

.footer-bottom {
  min-height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 25px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-bottom p {
  margin: 0;
  font-size: 8px;
}

.mobile-download {
  position: fixed;
  right: 12px;
  bottom: 12px;
  left: 12px;
  z-index: 1001;
  min-height: 64px;
  padding: 9px 9px 9px 16px;
  display: none;
  align-items: center;
  justify-content: space-between;
  gap: 15px;
  color: #fff;
  background: rgba(17, 24, 39, 0.96);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: 17px;
  box-shadow: 0 18px 50px rgba(0, 0, 0, 0.28);
  backdrop-filter: blur(15px);
}

.mobile-download > div {
  display: flex;
  flex-direction: column;
}

.mobile-download small {
  color: var(--orange-soft);
  font-size: 8px;
  font-weight: 900;
  letter-spacing: 0.1em;
}

.mobile-download strong {
  margin-top: 3px;
  font-size: 11px;
}

.mobile-download a {
  min-width: 95px;
  padding: 11px 14px;
  color: var(--ink);
  background: var(--orange-soft);
  border-radius: 11px;
  text-align: center;
  font-size: 10px;
  font-weight: 900;
}

:focus-visible {
  outline: 3px solid rgba(36, 93, 193, 0.42);
  outline-offset: 3px;
}

@media (max-width: 1080px) {
  .site-nav {
    gap: 17px;
  }

  .hero-inner {
    gap: 45px;
  }

  .prepare-layout,
  .permission-layout {
    gap: 45px;
  }

  .footer-main {
    gap: 28px;
  }
}

@media (max-width: 920px) {
  :root {
    --header-height: 68px;
  }

  .section {
    padding: 84px 0;
  }

  .brand > span,
  .header-cta {
    display: none;
  }

  .nav-toggle {
    display: grid;
  }

  .site-nav {
    position: fixed;
    top: var(--header-height);
    right: 0;
    bottom: 0;
    left: 0;
    margin: 0;
    padding: 31px 24px;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 3px;
    visibility: hidden;
    background: rgba(255, 253, 248, 0.99);
    opacity: 0;
    transform: translateY(-15px);
    transition: opacity 180ms ease, transform 180ms ease, visibility 180ms ease;
  }

  .site-nav.is-open {
    visibility: visible;
    opacity: 1;
    transform: translateY(0);
  }

  .site-nav a {
    padding: 14px 4px;
    border-bottom: 1px solid var(--line);
  }

  .hero-inner {
    padding-top: 72px;
    padding-bottom: 120px;
    grid-template-columns: 1fr;
    gap: 65px;
  }

  .hero-title {
    max-width: 760px;
  }

  .guide-poster {
    width: min(100%, 600px);
    margin-inline: auto;
  }

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

  .hero-steps article:nth-child(2) {
    border-right: 0;
  }

  .hero-steps article:nth-child(-n + 2) {
    border-bottom: 1px solid rgba(255, 255, 255, 0.09);
  }

  .section-heading--split,
  .prepare-layout,
  .permission-layout,
  .faq-layout {
    grid-template-columns: 1fr;
    gap: 43px;
  }

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

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

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

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

  .faq-copy {
    position: static;
  }

  .final-cta__inner {
    grid-template-columns: 1fr;
    gap: 31px;
  }

  .footer-main {
    grid-template-columns: 1.2fr 1fr 1fr;
  }

  .footer-action {
    grid-column: 1 / -1;
  }
}

@media (max-width: 640px) {
  .container {
    width: min(calc(100% - 28px), var(--container));
  }

  .section {
    padding: 70px 0;
  }

  .brand img {
    width: 96px;
    height: 38px;
  }

  .hero-inner {
    min-height: auto;
    padding-top: 58px;
    padding-bottom: 112px;
  }

  .hero h1 {
    font-size: 42px;
  }

  .hero h1 span {
    font-size: 23px;
  }

  .hero-title > p {
    font-size: 13px;
  }

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

  .primary-cta {
    width: 100%;
  }

  .secondary-cta {
    align-self: flex-start;
  }

  .guide-poster {
    transform: none;
  }

  .guide-poster__route {
    grid-template-columns: 1fr;
  }

  .guide-poster__route i {
    transform: rotate(90deg);
  }

  .hero-steps {
    grid-template-columns: 1fr;
    margin-bottom: -79px;
  }

  .hero-steps article {
    border-right: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.09);
  }

  .hero-steps article:last-child {
    border-bottom: 0;
  }

  .choose-section {
    padding-top: 187px;
  }

  .section-heading h2,
  .prepare-intro h2,
  .permission-layout h2,
  .faq-copy h2 {
    font-size: 34px;
  }

  .section-heading--split {
    gap: 18px;
  }

  .device-switch__buttons,
  .prepare-grid,
  .runway-nav,
  .permission-grid,
  .final-check-grid,
  .check-actions {
    grid-template-columns: 1fr;
  }

  .device-switch__buttons button {
    min-height: 120px;
  }

  .device-switch__panels {
    padding: 28px 21px;
  }

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

  .device-panel__number {
    width: 58px;
    height: 58px;
    border-radius: 17px;
  }

  .device-switch__panels h3,
  .runway-panels h3 {
    font-size: 25px;
  }

  .prepare-grid label {
    min-height: 130px;
    grid-template-columns: auto 1fr;
  }

  .prepare-mark {
    grid-column: 2;
    justify-self: end;
    margin-top: -38px;
  }

  .runway-panels article {
    min-height: 0;
    padding: 28px 21px;
  }

  .faq-list details > div {
    padding-right: 3px;
  }

  .final-cta {
    padding-bottom: 98px;
  }

  .final-cta__inner > a {
    width: 100%;
  }

  .footer-main {
    padding-bottom: 95px;
    grid-template-columns: 1fr 1fr;
  }

  .footer-brand,
  .footer-action {
    grid-column: 1 / -1;
  }

  .footer-bottom {
    padding: 18px 0 95px;
    align-items: flex-start;
    flex-direction: column;
    gap: 7px;
  }

  .mobile-download {
    display: flex;
  }
}

@media (max-width: 390px) {
  .hero h1 {
    font-size: 37px;
  }

  .hero h1 span {
    font-size: 20px;
  }

  .guide-poster__footer {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
  }

  .footer-main {
    grid-template-columns: 1fr;
  }

  .footer-brand,
  .footer-action {
    grid-column: auto;
  }
}

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

  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}


/* QQPK_SAFE_01_33_START */

/*
   QQPK 01-33 图片基础安全补丁
*/

html,
body {
    max-width: 100%;
    overflow-x: hidden;
}

main {
    max-width: 100%;
    overflow-x: clip;
}

main figure,
main picture {
    max-width: 100%;
}

main img {
    max-width: 100%;
}

/*
   客户端截图和安装步骤图优先完整显示。
*/

main figure img,
main [class*="stage"] img,
main [class*="screen"] img,
main [class*="preview"] img,
main [class*="visual"] img,
main [class*="gallery"] img,
main [class*="step"] img {
    object-fit: contain;
}

/* QQPK_SAFE_01_33_END */

.site-footer--guide {
  background: #111827;
}

.footer-guide {
  padding-top: 48px;
  padding-bottom: 22px;
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  gap: 36px;
  align-items: start;
}

.footer-guide__brand {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.footer-guide__brand img {
  width: 118px;
  height: 46px;
  object-fit: contain;
  object-position: left center;
  filter: brightness(1.12);
}

.footer-guide__brand strong {
  display: block;
  color: #fff;
  font-size: 14px;
}

.footer-guide__brand p {
  max-width: 360px;
  margin: 10px 0 0;
  font-size: 12px;
  line-height: 1.8;
}

.footer-guide__links {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.footer-guide__links div {
  min-height: 126px;
  padding: 16px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  background: rgba(255, 255, 255, 0.045);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 18px;
}

.footer-guide__links span {
  color: var(--orange-soft);
  font-size: 8px;
  font-weight: 900;
  letter-spacing: 0.11em;
}

.footer-guide__links strong {
  display: block;
  margin-top: 10px;
  color: #fff;
  font-size: 13px;
  line-height: 1.45;
}

.footer-guide__bottom {
  padding-top: 16px;
  padding-bottom: 26px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-guide__bottom p {
  margin: 0;
  font-size: 8px;
}

.footer-guide__bottom a {
  color: var(--blue-soft);
  font-size: 10px;
  font-weight: 900;
}

@media (max-width: 920px) {
  .footer-guide {
    grid-template-columns: 1fr;
  }

  .footer-guide__links {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 640px) {
  .footer-guide {
    padding-top: 38px;
    padding-bottom: 18px;
  }

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

  .footer-guide__links div {
    min-height: auto;
    gap: 10px;
  }

  .footer-guide__bottom {
    flex-direction: column;
    align-items: flex-start;
  }
}

.final-cta--guide .final-cta__inner {
  grid-template-columns: minmax(0, 1fr) auto;
}

.final-cta--guide .final-cta__steps {
  margin-top: 22px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}

.final-cta--guide .final-cta__steps div {
  padding: 14px 16px;
  background: rgba(255, 255, 255, 0.045);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: 16px;
}

.final-cta--guide .final-cta__steps span {
  color: var(--orange-soft);
  font-size: 8px;
  font-weight: 900;
  letter-spacing: 0.11em;
}

.final-cta--guide .final-cta__steps strong {
  display: block;
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.5;
}

@media (max-width: 920px) {
  .final-cta--guide .final-cta__inner {
    grid-template-columns: 1fr;
  }

  .final-cta--guide .final-cta__steps {
    grid-template-columns: 1fr;
  }
}