:root {
  --coral: #f05b66;
  --coral-dark: #c83d4a;
  --yellow: #ffc857;
  --cream: #fffaf2;
  --paper: #ffffff;
  --ink: #2b272c;
  --muted: #6f696e;
  --teal: #377f78;
  --line: #e9dfd5;
  --shadow: 6px 6px 0 rgba(43, 39, 44, 0.12);
  --content: 1160px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--cream);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  line-height: 1.75;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  content: "";
  background-image: radial-gradient(rgba(240, 91, 102, 0.11) 1px, transparent 1px);
  background-size: 18px 18px;
}

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

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

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

.skip-link {
  position: fixed;
  top: -80px;
  left: 16px;
  z-index: 1000;
  padding: 10px 16px;
  background: var(--ink);
  color: #fff;
}

.skip-link:focus {
  top: 12px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 2px solid var(--ink);
  background: rgba(255, 250, 242, 0.96);
  backdrop-filter: blur(10px);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: min(calc(100% - 32px), var(--content));
  min-height: 70px;
  margin: 0 auto;
  gap: 24px;
}

.brand {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 800;
}

.brand img {
  width: 44px;
  height: 44px;
  border: 2px solid var(--ink);
  border-radius: 50%;
  background: #fff;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.site-nav > a:not(.download-btn) {
  padding: 7px 12px;
  border-bottom: 2px solid transparent;
  font-size: 15px;
  font-weight: 700;
}

.site-nav > a[aria-current="page"],
.site-nav > a:not(.download-btn):hover {
  border-color: var(--coral);
  color: var(--coral-dark);
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 9px;
  border: 2px solid var(--ink);
  border-radius: 4px;
  background: var(--paper);
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  height: 2px;
  margin: 5px 0;
  background: var(--ink);
}

.download-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 10px 22px;
  border: 2px solid var(--ink);
  border-radius: 5px;
  background: var(--coral);
  box-shadow: 4px 4px 0 var(--ink);
  color: #fff;
  font-weight: 800;
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.download-btn:hover,
.download-btn:focus-visible {
  background: var(--coral-dark);
  box-shadow: 2px 2px 0 var(--ink);
  transform: translate(2px, 2px);
}

.download-btn.secondary {
  background: var(--yellow);
  color: var(--ink);
}

.hero {
  position: relative;
  overflow: hidden;
  border-bottom: 2px solid var(--ink);
  background: var(--paper);
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(420px, 0.95fr);
  align-items: center;
  width: min(calc(100% - 32px), var(--content));
  min-height: 610px;
  margin: 0 auto;
  padding: 54px 0 34px;
  gap: 62px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 2px 11px;
  border: 2px solid var(--ink);
  border-radius: 4px;
  background: var(--yellow);
  font-size: 13px;
  font-weight: 800;
}

.hero h1,
.page-hero h1 {
  max-width: 800px;
  margin: 18px 0 18px;
  font-size: clamp(38px, 6vw, 68px);
  line-height: 1.08;
  letter-spacing: 0;
}

.hero-copy > p {
  max-width: 650px;
  margin: 0 0 26px;
  color: #4f494e;
  font-size: 18px;
}

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

.hero-note {
  color: var(--muted);
  font-size: 14px;
}

.hero-art {
  position: relative;
  min-height: 520px;
}

.phone-shot {
  position: absolute;
  width: min(58%, 270px);
  max-width: 400px;
  height: auto;
  border: 3px solid var(--ink);
  border-radius: 24px;
  box-shadow: 10px 10px 0 var(--yellow);
}

.phone-shot.primary {
  top: 0;
  right: 15%;
  z-index: 2;
  transform: rotate(3deg);
}

.phone-shot.secondary-shot {
  right: 54%;
  bottom: 0;
  z-index: 1;
  width: min(50%, 230px);
  box-shadow: 9px 9px 0 var(--teal);
  transform: rotate(-5deg);
}

.comic-tag {
  position: absolute;
  right: 0;
  bottom: 30px;
  z-index: 3;
  max-width: 180px;
  padding: 10px 14px;
  border: 2px solid var(--ink);
  background: var(--paper);
  box-shadow: 4px 4px 0 var(--ink);
  font-size: 14px;
  font-weight: 800;
  transform: rotate(-2deg);
}

.trust-strip {
  border-bottom: 2px solid var(--ink);
  background: var(--ink);
  color: #fff;
}

.trust-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  width: min(100%, var(--content));
  margin: 0 auto;
}

.trust-item {
  padding: 18px 24px;
  border-right: 1px solid #5a535b;
  text-align: center;
}

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

.trust-item strong {
  display: block;
  color: var(--yellow);
  font-size: 20px;
}

.section {
  padding: 76px 0;
  border-bottom: 2px solid var(--ink);
}

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

.container {
  width: min(calc(100% - 32px), var(--content));
  margin: 0 auto;
}

.section-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  margin-bottom: 34px;
  gap: 24px;
}

.section-heading h2,
.content-block h2 {
  margin: 0;
  font-size: clamp(28px, 4vw, 42px);
  line-height: 1.2;
  letter-spacing: 0;
}

.section-kicker {
  color: var(--coral-dark);
  font-size: 13px;
  font-weight: 900;
  text-transform: uppercase;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 2px solid var(--ink);
  border-left: 2px solid var(--ink);
  background: var(--paper);
}

.feature-item {
  min-height: 270px;
  padding: 28px 24px;
  border-right: 2px solid var(--ink);
  border-bottom: 2px solid var(--ink);
}

.feature-item:nth-child(2) {
  background: #fff4d8;
}

.feature-item:nth-child(3) {
  background: #edf8f6;
}

.feature-item:nth-child(4) {
  background: #fff0f1;
}

.feature-no {
  display: inline-grid;
  width: 40px;
  height: 40px;
  place-items: center;
  border: 2px solid var(--ink);
  border-radius: 50%;
  background: var(--yellow);
  font-weight: 900;
}

.feature-item h3 {
  margin: 26px 0 8px;
  font-size: 21px;
}

.feature-item p {
  margin: 0;
  color: var(--muted);
}

.screens-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  align-items: end;
  gap: 22px;
}

.screen-figure {
  margin: 0;
}

.screen-img {
  width: 100%;
  max-width: 301px;
  height: auto;
  margin: 0 auto;
  border: 3px solid var(--ink);
  border-radius: 18px;
  background: #fff;
  box-shadow: 7px 7px 0 rgba(55, 127, 120, 0.35);
}

.screen-figure:nth-child(even) .screen-img {
  box-shadow: 7px 7px 0 rgba(255, 200, 87, 0.75);
}

.screen-figure figcaption {
  padding: 16px 4px 0;
}

.screen-figure strong {
  display: block;
  font-size: 17px;
}

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

.route-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.route-card,
.review-card {
  border: 2px solid var(--ink);
  border-radius: 6px;
  background: var(--paper);
  box-shadow: var(--shadow);
}

.route-card {
  display: grid;
  grid-template-columns: 82px 1fr;
  min-height: 230px;
  padding: 28px;
  gap: 22px;
}

.route-mark {
  display: grid;
  width: 72px;
  height: 72px;
  place-items: center;
  border: 2px solid var(--ink);
  border-radius: 50%;
  background: var(--coral);
  color: #fff;
  font-size: 28px;
  font-weight: 900;
}

.route-card:nth-child(2) .route-mark {
  background: var(--teal);
}

.route-card h3 {
  margin: 2px 0 10px;
  font-size: 24px;
}

.route-card p {
  margin: 0 0 16px;
  color: var(--muted);
}

.text-link {
  color: var(--coral-dark);
  font-weight: 800;
}

.text-link::after {
  content: " →";
}

.review-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.review-card {
  min-height: 240px;
  padding: 26px;
}

.review-stars {
  color: var(--coral);
  font-weight: 900;
  letter-spacing: 0;
}

.review-card blockquote {
  margin: 18px 0;
  font-size: 17px;
}

.review-card cite {
  color: var(--muted);
  font-size: 14px;
  font-style: normal;
}

.quick-faq {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border-top: 2px solid var(--ink);
  border-left: 2px solid var(--ink);
}

.quick-faq article {
  padding: 24px;
  border-right: 2px solid var(--ink);
  border-bottom: 2px solid var(--ink);
  background: var(--paper);
}

.quick-faq h3 {
  margin: 0 0 8px;
  font-size: 18px;
}

.quick-faq p {
  margin: 0;
  color: var(--muted);
}

.download-band {
  padding: 58px 0;
  border-bottom: 2px solid var(--ink);
  background: var(--yellow);
}

.download-band .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
}

.download-band h2 {
  margin: 0 0 5px;
  font-size: clamp(27px, 4vw, 40px);
  line-height: 1.2;
}

.download-band .band-copy {
  margin: 0;
}

.page-hero {
  padding: 70px 0 58px;
  border-bottom: 2px solid var(--ink);
  background: var(--paper);
}

.page-hero h1 {
  font-size: clamp(38px, 6vw, 62px);
}

.page-hero p {
  max-width: 760px;
  margin: 0;
  color: var(--muted);
  font-size: 18px;
}

.page-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  align-items: start;
  width: min(calc(100% - 32px), var(--content));
  margin: 0 auto;
  padding: 68px 0;
  gap: 52px;
}

.page-layout.single {
  display: block;
  max-width: 960px;
}

.content-block {
  margin-bottom: 58px;
}

.content-block h2 {
  padding-bottom: 14px;
  border-bottom: 3px solid var(--ink);
}

.content-block h3 {
  margin: 30px 0 8px;
  font-size: 22px;
}

.content-block p,
.content-block li {
  color: #514c50;
}

.content-block a:not(.download-btn) {
  color: var(--coral-dark);
  font-weight: 700;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.step-list {
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  counter-reset: steps;
}

.step-item {
  position: relative;
  min-height: 138px;
  padding: 0 0 38px 86px;
  counter-increment: steps;
}

.step-item::before {
  position: absolute;
  top: 0;
  left: 0;
  display: grid;
  width: 58px;
  height: 58px;
  place-items: center;
  border: 2px solid var(--ink);
  border-radius: 50%;
  background: var(--yellow);
  content: counter(steps, decimal-leading-zero);
  font-weight: 900;
}

.step-item::after {
  position: absolute;
  top: 62px;
  bottom: 2px;
  left: 28px;
  width: 2px;
  background: var(--ink);
  content: "";
}

.step-item:last-child::after {
  display: none;
}

.step-item h3 {
  margin: 0 0 8px;
}

.step-item p {
  margin: 0;
}

.tip-box {
  margin: 26px 0;
  padding: 22px 24px;
  border: 2px solid var(--ink);
  border-left: 10px solid var(--teal);
  border-radius: 4px;
  background: #edf8f6;
}

.tip-box strong {
  display: block;
  margin-bottom: 4px;
}

.guide-shot {
  max-width: 260px;
  margin: 28px auto;
  border: 3px solid var(--ink);
  border-radius: 18px;
  box-shadow: 8px 8px 0 var(--yellow);
}

.side-nav {
  position: sticky;
  top: 96px;
  padding: 22px;
  border: 2px solid var(--ink);
  border-radius: 6px;
  background: var(--paper);
  box-shadow: 5px 5px 0 rgba(43, 39, 44, 0.14);
}

.side-nav strong {
  display: block;
  margin-bottom: 12px;
}

.side-nav a {
  display: block;
  padding: 8px 0;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 14px;
}

.side-nav a:hover {
  color: var(--coral-dark);
}

.mode-table {
  width: 100%;
  margin: 24px 0;
  border-collapse: collapse;
  background: var(--paper);
}

.mode-table th,
.mode-table td {
  padding: 14px 16px;
  border: 2px solid var(--ink);
  text-align: left;
  vertical-align: top;
}

.mode-table th {
  background: var(--yellow);
}

.faq-list {
  margin-top: 28px;
  border-top: 2px solid var(--ink);
}

.faq-list details {
  border-right: 2px solid var(--ink);
  border-bottom: 2px solid var(--ink);
  border-left: 2px solid var(--ink);
  background: var(--paper);
}

.faq-list summary {
  position: relative;
  padding: 20px 54px 20px 20px;
  cursor: pointer;
  font-weight: 800;
  list-style: none;
}

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

.faq-list summary::after {
  position: absolute;
  top: 50%;
  right: 20px;
  content: "+";
  font-size: 26px;
  line-height: 1;
  transform: translateY(-50%);
}

.faq-list details[open] summary {
  background: #fff4d8;
}

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

.faq-answer {
  padding: 0 20px 20px;
}

.faq-answer p {
  margin: 0;
}

.site-footer {
  padding: 46px 0 26px;
  background: var(--ink);
  color: #fff;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.3fr 0.7fr 0.7fr;
  gap: 40px;
}

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

.footer-brand img {
  width: 42px;
  height: 42px;
  border: 2px solid #fff;
  border-radius: 50%;
  background: #fff;
}

.footer-copy {
  max-width: 520px;
  color: #d4cfd3;
  font-size: 14px;
}

.footer-links strong {
  display: block;
  margin-bottom: 10px;
  color: var(--yellow);
}

.footer-links a {
  display: block;
  padding: 5px 0;
  color: #e7e2e6;
  font-size: 14px;
}

.disclaimer {
  margin: 34px 0 0;
  padding-top: 20px;
  border-top: 1px solid #5a535b;
  color: #bdb7bc;
  font-size: 13px;
}

.copyright {
  margin: 8px 0 0;
  color: #8f898e;
  font-size: 13px;
}

@media (max-width: 980px) {
  .hero-inner {
    grid-template-columns: 1fr 0.8fr;
    gap: 30px;
  }

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

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

  .review-card {
    min-height: 0;
  }

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

  .side-nav {
    position: static;
    order: -1;
  }
}

@media (max-width: 760px) {
  .nav-wrap {
    min-height: 62px;
  }

  .brand {
    font-size: 18px;
  }

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

  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    top: 62px;
    right: 0;
    left: 0;
    display: none;
    align-items: stretch;
    padding: 14px 16px 20px;
    border-bottom: 2px solid var(--ink);
    background: var(--cream);
    flex-direction: column;
  }

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

  .site-nav > a:not(.download-btn) {
    padding: 10px 4px;
  }

  .hero-inner {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-top: 42px;
  }

  .hero h1,
  .page-hero h1 {
    font-size: 40px;
  }

  .hero-copy > p,
  .page-hero p {
    font-size: 16px;
  }

  .hero-art {
    min-height: 320px;
  }

  .phone-shot.primary {
    right: 10%;
    width: 46%;
  }

  .phone-shot.secondary-shot {
    right: 52%;
    width: 39%;
  }

  .comic-tag {
    right: 1%;
    bottom: 18px;
  }

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

  .trust-item:nth-child(2) {
    border-right: 0;
  }

  .trust-item:nth-child(-n + 2) {
    border-bottom: 1px solid #5a535b;
  }

  .section {
    padding: 54px 0;
  }

  .section-heading {
    display: block;
  }

  .feature-grid,
  .screens-grid,
  .route-grid,
  .quick-faq,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .route-card {
    grid-template-columns: 58px 1fr;
    min-height: 0;
    padding: 22px;
  }

  .route-mark {
    width: 54px;
    height: 54px;
    font-size: 22px;
  }

  .screens-grid {
    gap: 34px;
  }

  .screen-img {
    width: min(86vw, 301px);
  }

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

  .page-hero {
    padding: 48px 0 42px;
  }

  .page-layout {
    padding: 48px 0;
    gap: 34px;
  }

  .step-item {
    padding-left: 72px;
  }

  .mode-table,
  .mode-table tbody,
  .mode-table tr,
  .mode-table th,
  .mode-table td {
    display: block;
    width: 100%;
  }

  .mode-table tr {
    margin-bottom: 14px;
  }
}

@media (max-width: 420px) {
  .hero h1,
  .page-hero h1 {
    font-size: 34px;
  }

  .hero-actions,
  .hero-actions .download-btn {
    width: 100%;
  }

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

  .hero-art {
    min-height: 285px;
  }

  .phone-shot.primary {
    width: 42%;
  }

  .phone-shot.secondary-shot {
    width: 36%;
  }

  .comic-tag {
    max-width: 142px;
    font-size: 12px;
  }

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

  .trust-item {
    padding: 15px 8px;
  }

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

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

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }
}