:root {
  --orange: #ff6422;
  --orange-dark: #d9480f;
  --cyan: #16b8c4;
  --yellow: #ffd166;
  --rose: #ef476f;
  --ink: #171923;
  --ink-soft: #2d303c;
  --paper: #fffaf5;
  --white: #ffffff;
  --line: #dedbd6;
  --muted: #6d6f78;
  --shell: 1180px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: 92px;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "微软雅黑", Arial, Helvetica, sans-serif;
  font-size: 16px;
  line-height: 1.75;
}

body.menu-open {
  overflow: hidden;
}

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

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

button,
input {
  font: inherit;
}

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

:focus-visible {
  outline: 3px solid var(--cyan);
  outline-offset: 3px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  height: 76px;
  background: rgba(255, 250, 245, 0.96);
  border-bottom: 1px solid rgba(23, 25, 35, 0.12);
  backdrop-filter: blur(14px);
}

.nav-shell {
  width: min(calc(100% - 40px), var(--shell));
  height: 100%;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  flex: 0 0 auto;
  font-size: 22px;
  font-weight: 900;
  line-height: 1;
}

.brand img {
  width: 44px;
  height: 44px;
  border-radius: 8px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 25px;
  font-size: 14px;
  font-weight: 700;
}

.site-nav > a:not(.nav-download) {
  position: relative;
  padding: 10px 0;
}

.site-nav > a:not(.nav-download)::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 3px;
  width: 100%;
  height: 2px;
  background: var(--orange);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform 180ms ease;
}

.site-nav > a:hover::after,
.site-nav > a.is-active::after {
  transform: scaleX(1);
  transform-origin: left;
}

.nav-download,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 24px;
  border: 0;
  border-radius: 6px;
  font-weight: 900;
  line-height: 1;
  transition: transform 160ms ease, box-shadow 160ms ease, background-color 160ms ease;
}

.nav-download {
  min-height: 42px;
  padding: 0 19px;
  color: var(--white);
  background: var(--ink);
}

.button:hover,
.nav-download:hover {
  transform: translateY(-2px);
  box-shadow: 5px 5px 0 var(--cyan);
}

.button-primary {
  color: var(--white);
  background: var(--ink);
}

.button-light {
  color: var(--ink);
  background: var(--white);
}

.compact-button {
  min-height: 42px;
  margin-top: 14px;
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  color: var(--ink);
  background: transparent;
  border: 1px solid var(--ink);
  border-radius: 6px;
  font-size: 23px;
  line-height: 1;
}

.hero {
  overflow: hidden;
  color: var(--white);
  background: var(--orange);
  border-bottom: 1px solid var(--ink);
}

.hero-grid {
  width: min(calc(100% - 40px), var(--shell));
  min-height: 650px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.08fr 0.92fr;
  align-items: stretch;
  gap: 60px;
}

.hero-copy,
.hero-visual {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.hero-copy {
  padding: 58px 0;
}

.eyebrow,
.section-index,
.path-kicker {
  display: block;
  margin-bottom: 14px;
  font-size: 12px;
  font-weight: 900;
  text-transform: uppercase;
}

.hero h1 {
  max-width: 630px;
  margin: 0 0 20px;
  font-size: 66px;
  line-height: 1.08;
}

.hero-copy > p {
  max-width: 650px;
  margin: 0;
  color: rgba(255, 255, 255, 0.93);
  font-size: 18px;
  line-height: 1.85;
}

.hero-actions {
  margin-top: 28px;
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 24px;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-bottom: 1px solid currentColor;
  font-weight: 800;
}

.text-link span {
  transition: transform 160ms ease;
}

.text-link:hover span {
  transform: translateX(4px);
}

.strong-link {
  color: var(--orange-dark);
}

.hero-facts {
  margin: 36px 0 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  list-style: none;
  border-top: 1px solid rgba(255, 255, 255, 0.45);
}

.hero-facts li {
  padding: 18px 14px 0 0;
}

.hero-facts strong,
.hero-facts span {
  display: block;
}

.hero-facts strong {
  font-size: 18px;
}

.hero-facts span {
  color: rgba(255, 255, 255, 0.76);
  font-size: 12px;
}

.hero-visual {
  min-height: 100%;
  align-items: center;
  padding: 42px 0;
  background: var(--ink);
  box-shadow: 80px 0 0 var(--ink), -18px 0 0 var(--yellow);
}

.phone-stage {
  position: relative;
  width: min(100%, 360px);
  display: grid;
  place-items: center;
}

.phone-stage img {
  width: 340px;
  max-width: 100%;
  margin: auto 0;
  border: 7px solid var(--white);
  border-radius: 8px;
  box-shadow: 18px 18px 0 var(--cyan);
}

.stage-label {
  position: absolute;
  padding: 8px 12px;
  color: var(--ink);
  background: var(--yellow);
  border: 2px solid var(--ink);
  border-radius: 4px;
  font-size: 12px;
  font-weight: 900;
}

.stage-label-top {
  top: 9%;
  right: -46px;
}

.stage-label-bottom {
  left: -42px;
  bottom: 15%;
  background: var(--cyan);
}

.ticker {
  overflow: hidden;
  color: var(--ink);
  background: var(--yellow);
  border-bottom: 1px solid var(--ink);
}

.ticker-track {
  width: min(calc(100% - 40px), var(--shell));
  min-height: 68px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  white-space: nowrap;
  font-size: 14px;
  font-weight: 900;
}

.ticker-track i {
  width: 7px;
  height: 7px;
  flex: 0 0 auto;
  background: var(--orange);
  transform: rotate(45deg);
}

.section {
  padding: 96px 0;
}

.section-shell,
.article-shell,
.inner-hero-shell,
.download-band-inner,
.footer-grid,
.footer-bottom {
  width: min(calc(100% - 40px), var(--shell));
  margin: 0 auto;
}

.section-dark {
  color: var(--white);
  background: var(--ink);
}

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

.section-heading h2,
.control-copy > h2,
.download-band h2 {
  margin: 0;
  font-size: 42px;
  line-height: 1.25;
}

.section-index {
  margin-bottom: 8px;
  color: var(--orange-dark);
}

.light-heading .section-index {
  color: var(--yellow);
}

.split-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 30px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border-top: 1px solid rgba(255, 255, 255, 0.22);
  border-left: 1px solid rgba(255, 255, 255, 0.22);
}

.feature-item {
  position: relative;
  min-height: 310px;
  padding: 34px 28px;
  border-right: 1px solid rgba(255, 255, 255, 0.22);
  border-bottom: 1px solid rgba(255, 255, 255, 0.22);
}

.feature-item::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 7px;
  height: 74px;
  background: var(--orange);
}

.feature-item.accent-cyan::before { background: var(--cyan); }
.feature-item.accent-yellow::before { background: var(--yellow); }
.feature-item.accent-rose::before { background: var(--rose); }

.feature-number {
  color: rgba(255, 255, 255, 0.45);
  font-size: 13px;
  font-weight: 900;
}

.feature-item h3 {
  margin: 74px 0 13px;
  font-size: 23px;
}

.feature-item p {
  margin: 0;
  color: rgba(255, 255, 255, 0.72);
  font-size: 14px;
}

.showcase {
  background: var(--white);
}

.screen-tabs {
  display: inline-flex;
  border: 1px solid var(--ink);
  border-radius: 6px;
  overflow: hidden;
}

.screen-tab {
  min-width: 68px;
  padding: 9px 14px;
  color: var(--ink);
  background: transparent;
  border: 0;
  border-right: 1px solid var(--ink);
  cursor: pointer;
}

.screen-tab:last-child {
  border-right: 0;
}

.screen-tab.is-active {
  color: var(--white);
  background: var(--ink);
}

.screen-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 24px;
}

.screen-item {
  margin: 0;
  transition: opacity 180ms ease, transform 180ms ease;
}

.screen-item[hidden] {
  display: none;
}

.screen-item-offset {
  padding-top: 54px;
}

.screen-item img {
  width: 100%;
  max-width: 280px;
  margin: 0 auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 10px 10px 0 #ece8e1;
}

.screen-item figcaption {
  max-width: 280px;
  margin: 18px auto 0;
}

.screen-item figcaption strong,
.screen-item figcaption span {
  display: block;
}

.screen-item figcaption strong {
  font-size: 17px;
}

.screen-item figcaption span {
  margin-top: 5px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.65;
}

.control-section {
  color: var(--white);
  background: var(--cyan);
  border-top: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
}

.control-grid {
  display: grid;
  grid-template-columns: 1.12fr 0.88fr;
  gap: 76px;
  align-items: center;
}

.control-copy .section-index {
  color: var(--ink);
}

.control-copy > h2 {
  margin-bottom: 36px;
}

.control-list {
  border-top: 1px solid rgba(23, 25, 35, 0.35);
}

.control-list article {
  padding: 22px 0;
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 20px;
  border-bottom: 1px solid rgba(23, 25, 35, 0.35);
}

.control-list article > span {
  color: var(--ink);
  font-weight: 900;
}

.control-list h3,
.control-list p {
  margin: 0;
}

.control-list h3 {
  font-size: 18px;
}

.control-list p {
  margin-top: 4px;
  color: rgba(255, 255, 255, 0.86);
  font-size: 14px;
}

.control-copy .strong-link {
  margin-top: 26px;
  color: var(--ink);
}

.control-visual {
  position: relative;
  min-height: 580px;
  display: grid;
  place-items: center;
  background: var(--ink);
  border: 1px solid var(--ink);
}

.control-visual img {
  width: 300px;
  max-width: 76%;
  border-radius: 8px;
}

.control-note {
  position: absolute;
  right: -18px;
  bottom: 28px;
  padding: 15px 18px;
  color: var(--ink);
  background: var(--yellow);
  border: 2px solid var(--ink);
  border-radius: 4px;
}

.control-note strong,
.control-note span {
  display: block;
}

.control-note span {
  font-size: 11px;
}

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

.path-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  border: 1px solid var(--ink);
}

.path-item {
  position: relative;
  min-height: 330px;
  padding: 42px;
  border-right: 1px solid var(--ink);
  transition: color 180ms ease, background-color 180ms ease;
}

.path-item:last-child {
  border-right: 0;
}

.path-item:hover {
  color: var(--white);
  background: var(--ink);
}

.path-kicker {
  color: var(--orange-dark);
}

.path-item h3 {
  max-width: 430px;
  margin: 55px 0 14px;
  font-size: 30px;
  line-height: 1.3;
}

.path-item p {
  max-width: 440px;
  margin: 0;
  color: var(--muted);
}

.path-item:hover p {
  color: rgba(255, 255, 255, 0.7);
}

.path-item b {
  position: absolute;
  right: 36px;
  bottom: 28px;
  color: var(--orange);
  font-size: 20px;
}

.reviews-section {
  color: var(--white);
  background: var(--orange);
}

.reviews-section .section-index {
  color: var(--yellow);
}

.review-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.review-grid blockquote {
  margin: 0;
  padding: 30px;
  color: var(--ink);
  background: var(--white);
  border: 2px solid var(--ink);
  border-radius: 6px;
  box-shadow: 8px 8px 0 var(--ink);
}

.review-grid blockquote:nth-child(2) {
  background: var(--yellow);
}

.review-grid blockquote:nth-child(3) {
  background: var(--cyan);
}

.review-grid p {
  margin: 0 0 24px;
  font-size: 17px;
  font-weight: 800;
}

.review-grid footer {
  font-size: 12px;
}

.quick-faq {
  background: var(--white);
}

.faq-preview-grid {
  display: grid;
  grid-template-columns: 0.72fr 1.28fr;
  gap: 80px;
  align-items: start;
}

.sticky-heading {
  position: sticky;
  top: 112px;
}

.sticky-heading .strong-link {
  margin-top: 28px;
}

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

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

.accordion-list summary,
.faq-item summary {
  position: relative;
  padding: 23px 46px 23px 0;
  cursor: pointer;
  list-style: none;
  font-weight: 900;
}

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

.accordion-list summary::after,
.faq-item summary::after {
  content: "+";
  position: absolute;
  right: 10px;
  top: 18px;
  font-size: 25px;
  line-height: 1;
}

.accordion-list details[open] summary::after,
.faq-item[open] summary::after {
  content: "−";
}

.accordion-list details > div,
.faq-item > div {
  padding: 0 50px 22px 0;
  color: var(--muted);
}

.download-band {
  padding: 54px 0;
  color: var(--white);
  background: var(--ink);
  border-bottom: 1px solid rgba(255, 255, 255, 0.15);
}

.download-band-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.download-band-inner > div > span {
  color: var(--cyan);
  font-size: 12px;
  font-weight: 900;
}

.download-band h2 {
  margin-top: 5px;
  font-size: 31px;
}

.site-footer {
  padding: 62px 0 0;
  color: rgba(255, 255, 255, 0.74);
  background: var(--ink);
}

.footer-grid {
  padding-bottom: 48px;
  display: grid;
  grid-template-columns: 1.2fr 0.8fr 1fr;
  gap: 60px;
}

.footer-brand {
  color: var(--white);
}

.footer-grid p {
  margin: 14px 0 0;
  font-size: 13px;
}

.footer-grid nav,
.footer-meta {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 10px;
  font-size: 13px;
}

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

.footer-bottom {
  min-height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 36px;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  font-size: 11px;
}

.footer-bottom span:last-child {
  max-width: 760px;
  text-align: right;
}

.inner-hero {
  color: var(--white);
  background: var(--ink);
  border-bottom: 12px solid var(--orange);
}

.guide-hero {
  border-bottom-color: var(--cyan);
}

.inner-hero-shell {
  min-height: 400px;
  padding: 62px 0;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 72px;
}

.inner-hero h1 {
  margin: 0 0 18px;
  font-size: 50px;
  line-height: 1.2;
}

.inner-hero p {
  max-width: 680px;
  margin: 0;
  color: rgba(255, 255, 255, 0.72);
  font-size: 17px;
}

.inner-hero-steps {
  display: grid;
  border: 1px solid rgba(255, 255, 255, 0.28);
}

.inner-hero-steps span {
  padding: 17px 20px;
  display: flex;
  align-items: center;
  gap: 18px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.28);
  font-weight: 800;
}

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

.inner-hero-steps b {
  color: var(--cyan);
}

.article-section {
  background: var(--white);
}

.article-shell {
  display: grid;
  grid-template-columns: 230px minmax(0, 1fr);
  gap: 72px;
  align-items: start;
}

.article-nav,
.faq-categories {
  position: sticky;
  top: 108px;
  display: flex;
  flex-direction: column;
  border-top: 3px solid var(--orange);
}

.article-nav strong,
.faq-categories strong {
  padding: 18px 0 10px;
}

.article-nav a,
.faq-categories a {
  padding: 9px 0;
  color: var(--muted);
  border-bottom: 1px solid var(--line);
  font-size: 13px;
}

.article-nav a:hover,
.faq-categories a:hover {
  color: var(--orange-dark);
}

.article-content > section {
  margin-bottom: 92px;
  scroll-margin-top: 104px;
}

.article-content > section:last-child {
  margin-bottom: 0;
}

.article-heading {
  margin-bottom: 30px;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  border-bottom: 2px solid var(--ink);
}

.article-heading span {
  order: 2;
  color: var(--orange-dark);
  font-size: 12px;
  font-weight: 900;
}

.article-heading h2 {
  margin: 0 0 12px;
  font-size: 34px;
  line-height: 1.25;
}

.article-content > section > p {
  color: #444650;
}

.article-content code {
  padding: 2px 6px;
  background: #f1efeb;
  border: 1px solid var(--line);
  border-radius: 4px;
  font-family: Consolas, Monaco, monospace;
}

.check-grid {
  margin-bottom: 28px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  border: 1px solid var(--ink);
}

.check-grid div {
  min-height: 110px;
  padding: 22px;
  display: grid;
  grid-template-columns: 48px 1fr;
  gap: 14px;
  border-right: 1px solid var(--ink);
  border-bottom: 1px solid var(--ink);
}

.check-grid div:nth-child(2n) {
  border-right: 0;
}

.check-grid div:nth-last-child(-n + 2) {
  border-bottom: 0;
}

.check-grid b {
  color: var(--orange-dark);
}

.check-grid span {
  color: var(--muted);
  font-size: 14px;
}

.step-list {
  margin: 0;
  padding: 0;
  list-style: none;
  border-top: 1px solid var(--line);
}

.step-list li {
  padding: 31px 0;
  display: grid;
  grid-template-columns: 75px 1fr;
  gap: 26px;
  border-bottom: 1px solid var(--line);
}

.step-no {
  width: 62px;
  height: 62px;
  display: grid;
  place-items: center;
  color: var(--white);
  background: var(--orange);
  border: 2px solid var(--ink);
  border-radius: 6px;
  font-weight: 900;
  box-shadow: 5px 5px 0 var(--ink);
}

.step-list h3,
.step-list p {
  margin: 0;
}

.step-list h3 {
  margin-bottom: 8px;
  font-size: 21px;
}

.step-list p {
  color: #484a54;
}

.guide-visual-row {
  margin-bottom: 44px;
  display: grid;
  grid-template-columns: 330px 1fr;
  gap: 48px;
  align-items: center;
}

.guide-visual-row figure {
  margin: 0;
}

.guide-visual-row img {
  width: 100%;
  max-width: 320px;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 9px 9px 0 var(--cyan);
}

.guide-visual-row figcaption {
  margin-top: 13px;
  color: var(--muted);
  font-size: 12px;
}

.reverse-row figure {
  order: 2;
}

.guide-copy-block h3 {
  margin: 23px 0 6px;
  font-size: 19px;
}

.guide-copy-block h3:first-child {
  margin-top: 0;
}

.guide-copy-block p {
  margin: 0;
  color: #484a54;
}

.notice-block {
  margin-bottom: 24px;
  padding: 28px;
  background: var(--yellow);
  border-left: 7px solid var(--orange);
}

.notice-block h3,
.notice-block p {
  margin: 0;
}

.notice-block p {
  margin-top: 8px;
}

.next-links {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border: 1px solid var(--ink);
}

.next-links a {
  min-height: 155px;
  padding: 24px;
  border-right: 1px solid var(--ink);
}

.next-links a:last-child {
  border-right: 0;
}

.next-links strong,
.next-links span {
  display: block;
}

.next-links span {
  margin-top: 26px;
  color: var(--muted);
  font-size: 12px;
}

.next-links a:hover {
  color: var(--white);
  background: var(--ink);
}

.next-links a:hover span {
  color: var(--yellow);
}

.faq-search-box {
  padding: 25px;
  color: var(--ink);
  background: var(--white);
  border-radius: 6px;
}

.faq-search-box label,
.faq-search-box small {
  display: block;
}

.faq-search-box label {
  margin-bottom: 8px;
  font-weight: 900;
}

.faq-search-box > div {
  display: flex;
  align-items: center;
  border-bottom: 2px solid var(--ink);
}

.faq-search-box input {
  width: 100%;
  padding: 12px 0;
  border: 0;
  outline: 0;
  background: transparent;
}

.faq-search-box div span {
  font-size: 27px;
}

.faq-search-box small {
  margin-top: 10px;
  color: var(--muted);
}

.feature-manual {
  background: var(--paper);
}

.manual-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  border: 1px solid var(--ink);
}

.manual-grid article {
  min-height: 280px;
  padding: 27px 22px;
  border-right: 1px solid var(--ink);
}

.manual-grid article:last-child {
  border-right: 0;
}

.manual-grid article:nth-child(2) { background: #e6f9fa; }
.manual-grid article:nth-child(4) { background: #fff1d1; }

.manual-grid article > span {
  color: var(--orange-dark);
  font-size: 11px;
  font-weight: 900;
}

.manual-grid h3 {
  margin: 78px 0 12px;
  font-size: 19px;
}

.manual-grid p {
  margin: 0;
  color: var(--muted);
  font-size: 13px;
}

.faq-directory {
  background: var(--white);
}

.faq-layout {
  display: grid;
  grid-template-columns: 210px minmax(0, 1fr);
  gap: 76px;
  align-items: start;
}

.faq-group {
  margin-bottom: 74px;
  scroll-margin-top: 104px;
}

.faq-group:last-of-type {
  margin-bottom: 0;
}

.faq-group[hidden],
.faq-item[hidden] {
  display: none;
}

.faq-group-title {
  margin-bottom: 8px;
  display: flex;
  align-items: baseline;
  gap: 18px;
  border-bottom: 3px solid var(--ink);
}

.faq-group-title span {
  color: var(--orange-dark);
  font-weight: 900;
}

.faq-group-title h2 {
  margin: 0 0 13px;
  font-size: 31px;
}

.faq-item summary {
  font-size: 17px;
}

.faq-empty {
  padding: 58px 20px;
  text-align: center;
  border: 2px dashed var(--line);
}

.faq-empty strong,
.faq-empty span {
  display: block;
}

.faq-empty span {
  margin-top: 8px;
  color: var(--muted);
}

@media (max-width: 980px) {
  .menu-toggle {
    display: grid;
    place-items: center;
  }

  .site-nav {
    position: fixed;
    inset: 76px 0 auto;
    max-height: calc(100vh - 76px);
    padding: 22px 20px 28px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    overflow: auto;
    background: var(--paper);
    border-bottom: 1px solid var(--ink);
  }

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

  .site-nav > a:not(.nav-download) {
    padding: 12px 4px;
    border-bottom: 1px solid var(--line);
  }

  .site-nav > a:not(.nav-download)::after {
    display: none;
  }

  .nav-download {
    margin-top: 12px;
  }

  .hero-grid {
    grid-template-columns: 1fr 0.82fr;
    gap: 36px;
  }

  .hero h1 {
    font-size: 52px;
  }

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

  .screen-strip {
    grid-template-columns: 1fr 1fr;
    gap: 50px 24px;
  }

  .screen-item-offset {
    padding-top: 0;
  }

  .control-grid {
    gap: 44px;
  }

  .article-shell,
  .faq-layout {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .article-nav,
  .faq-categories {
    position: static;
    display: grid;
    grid-template-columns: repeat(5, minmax(0, 1fr));
    border-bottom: 1px solid var(--line);
  }

  .article-nav strong,
  .faq-categories strong {
    grid-column: 1 / -1;
  }

  .article-nav a,
  .faq-categories a {
    padding-right: 10px;
    border-bottom: 0;
  }

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

  .manual-grid article:nth-child(3) {
    border-right: 0;
  }

  .manual-grid article:nth-child(-n + 3) {
    border-bottom: 1px solid var(--ink);
  }

  .manual-grid article:nth-child(5) {
    border-right: 0;
  }
}

@media (max-width: 720px) {
  .site-header {
    height: 68px;
  }

  .site-nav {
    inset: 68px 0 auto;
    max-height: calc(100vh - 68px);
  }

  .nav-shell,
  .hero-grid,
  .ticker-track,
  .section-shell,
  .article-shell,
  .inner-hero-shell,
  .download-band-inner,
  .footer-grid,
  .footer-bottom {
    width: min(calc(100% - 28px), var(--shell));
  }

  .brand {
    font-size: 20px;
  }

  .brand img {
    width: 40px;
    height: 40px;
  }

  .hero-grid {
    min-height: 0;
    padding: 32px 0 38px;
    grid-template-columns: 1fr;
    gap: 25px;
  }

  .hero-copy {
    padding: 0;
  }

  .hero h1 {
    margin-bottom: 12px;
    font-size: 40px;
  }

  .hero-copy > p {
    font-size: 14px;
    line-height: 1.65;
  }

  .hero-actions {
    margin-top: 19px;
    gap: 16px;
  }

  .button {
    min-height: 44px;
    padding: 0 19px;
  }

  .text-link {
    font-size: 13px;
  }

  .hero-facts {
    margin-top: 22px;
  }

  .hero-facts li {
    padding-top: 12px;
  }

  .hero-facts strong {
    font-size: 15px;
  }

  .hero-visual {
    min-height: 270px;
    padding: 20px 0;
    box-shadow: 22px 0 0 var(--ink), -8px 0 0 var(--yellow);
  }

  .phone-stage {
    width: 180px;
    height: 280px;
    overflow: hidden;
  }

  .phone-stage img {
    width: 158px;
    border-width: 4px;
    box-shadow: 8px 8px 0 var(--cyan);
  }

  .stage-label {
    padding: 5px 8px;
    font-size: 10px;
  }

  .stage-label-top {
    right: 0;
  }

  .stage-label-bottom {
    left: 0;
  }

  .ticker-track {
    min-height: 62px;
    justify-content: flex-start;
    gap: 18px;
    overflow-x: auto;
    font-size: 12px;
    scrollbar-width: none;
  }

  .section {
    padding: 68px 0;
  }

  .section-heading {
    margin-bottom: 30px;
  }

  .section-heading h2,
  .control-copy > h2 {
    font-size: 31px;
  }

  .split-heading {
    align-items: flex-start;
    flex-direction: column;
  }

  .feature-grid,
  .screen-strip,
  .control-grid,
  .path-grid,
  .review-grid,
  .faq-preview-grid,
  .inner-hero-shell,
  .footer-grid,
  .manual-grid {
    grid-template-columns: 1fr;
  }

  .feature-item {
    min-height: 235px;
  }

  .feature-item h3 {
    margin-top: 44px;
  }

  .screen-strip {
    gap: 46px;
  }

  .screen-item img {
    max-width: 250px;
  }

  .control-visual {
    min-height: 480px;
  }

  .control-note {
    right: 8px;
  }

  .path-item,
  .path-item:last-child {
    min-height: 280px;
    padding: 30px;
    border-right: 0;
    border-bottom: 1px solid var(--ink);
  }

  .path-item:last-child {
    border-bottom: 0;
  }

  .path-item h3 {
    margin-top: 40px;
    font-size: 25px;
  }

  .sticky-heading {
    position: static;
  }

  .download-band-inner {
    align-items: flex-start;
    flex-direction: column;
  }

  .download-band h2 {
    font-size: 25px;
  }

  .footer-grid {
    gap: 30px;
  }

  .footer-bottom {
    padding: 22px 0;
    align-items: flex-start;
    flex-direction: column;
    gap: 10px;
  }

  .footer-bottom span:last-child {
    text-align: left;
  }

  .inner-hero-shell {
    min-height: 0;
    padding: 50px 0;
    gap: 34px;
  }

  .inner-hero h1 {
    font-size: 36px;
  }

  .inner-hero p {
    font-size: 15px;
  }

  .article-nav,
  .faq-categories {
    grid-template-columns: 1fr 1fr;
  }

  .article-heading {
    align-items: flex-start;
    flex-direction: column;
    gap: 0;
  }

  .article-heading span {
    order: 0;
  }

  .article-heading h2 {
    font-size: 29px;
  }

  .check-grid,
  .guide-visual-row,
  .next-links {
    grid-template-columns: 1fr;
  }

  .check-grid div,
  .check-grid div:nth-child(2n),
  .check-grid div:nth-last-child(-n + 2) {
    border-right: 0;
    border-bottom: 1px solid var(--ink);
  }

  .check-grid div:last-child {
    border-bottom: 0;
  }

  .step-list li {
    grid-template-columns: 52px 1fr;
    gap: 18px;
  }

  .step-no {
    width: 48px;
    height: 48px;
  }

  .guide-visual-row {
    gap: 32px;
  }

  .guide-visual-row img {
    max-width: 280px;
    margin: 0 auto;
  }

  .reverse-row figure {
    order: 0;
  }

  .next-links a,
  .next-links a:last-child {
    border-right: 0;
    border-bottom: 1px solid var(--ink);
  }

  .next-links a:last-child {
    border-bottom: 0;
  }

  .manual-grid article,
  .manual-grid article:nth-child(3),
  .manual-grid article:nth-child(5) {
    min-height: 220px;
    border-right: 0;
    border-bottom: 1px solid var(--ink);
  }

  .manual-grid article:last-child {
    border-bottom: 0;
  }

  .manual-grid h3 {
    margin-top: 45px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition: none !important;
  }
}