:root {
  --ink: #171820;
  --paper: #fffaf0;
  --white: #ffffff;
  --orange: #ff6a2e;
  --orange-dark: #d94712;
  --yellow: #ffd447;
  --cyan: #20b7c4;
  --muted: #66646b;
  --line: #d9d3c7;
  --shadow: 6px 6px 0 var(--ink);
  --container: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
  font-size: 16px;
  line-height: 1.75;
}

body.menu-open {
  overflow: hidden;
}

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

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

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

button,
input {
  font: inherit;
}

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

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 1000;
  padding: 8px 14px;
  color: var(--white);
  background: var(--ink);
  transform: translateY(-150%);
}

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

.container {
  width: min(calc(100% - 36px), var(--container));
  margin-inline: auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  min-height: 72px;
  border-bottom: 3px solid var(--ink);
  background: var(--paper);
}

.nav-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 69px;
  gap: 26px;
}

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

.brand img {
  width: 42px;
  height: 42px;
  border: 2px solid var(--ink);
}

.nav-links {
  display: flex;
  align-items: center;
  margin: 0 0 0 auto;
  padding: 0;
  gap: 6px;
  list-style: none;
}

.nav-links a:not(.download-btn) {
  display: block;
  padding: 9px 13px;
  border-bottom: 3px solid transparent;
  font-weight: 700;
  line-height: 1.3;
}

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

.download-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 10px 20px;
  border: 3px solid var(--ink);
  border-radius: 6px;
  color: var(--ink);
  background: var(--yellow);
  box-shadow: 4px 4px 0 var(--ink);
  font-weight: 900;
  line-height: 1.2;
  transition: transform 160ms ease, box-shadow 160ms ease, background 160ms ease;
}

.download-btn::before {
  content: "\2193";
  margin-right: 8px;
  font-size: 20px;
  line-height: 1;
}

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

.download-btn.dark {
  color: var(--white);
  background: var(--ink);
  box-shadow: 4px 4px 0 var(--white);
}

.download-btn.dark:hover {
  color: var(--ink);
  background: var(--white);
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 0;
  border: 3px solid var(--ink);
  border-radius: 4px;
  background: var(--yellow);
  cursor: pointer;
}

.menu-toggle span {
  display: block;
  width: 22px;
  height: 3px;
  margin: 4px auto;
  background: var(--ink);
}

.hero {
  position: relative;
  overflow: hidden;
  border-bottom: 3px solid var(--ink);
  background: var(--orange);
}

.hero::after {
  content: "";
  position: absolute;
  right: -64px;
  bottom: -62px;
  width: 250px;
  height: 250px;
  border: 28px solid var(--yellow);
  transform: rotate(18deg);
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: minmax(0, 1.08fr) minmax(350px, 0.92fr);
  align-items: center;
  min-height: min(690px, calc(100vh - 72px));
  gap: 60px;
  padding-block: 58px;
}

.eyebrow {
  display: inline-block;
  margin: 0 0 18px;
  padding: 5px 12px;
  border: 2px solid var(--ink);
  background: var(--yellow);
  font-size: 14px;
  font-weight: 900;
}

h1,
h2,
h3 {
  margin-top: 0;
  line-height: 1.25;
}

h1 {
  max-width: 630px;
  margin-bottom: 22px;
  font-size: clamp(42px, 7vw, 82px);
  font-weight: 900;
}

h2 {
  margin-bottom: 30px;
  font-size: clamp(30px, 4vw, 48px);
  font-weight: 900;
}

h3 {
  margin-bottom: 10px;
  font-size: 21px;
  font-weight: 900;
}

.hero-copy {
  max-width: 630px;
  margin: 0 0 28px;
  font-size: 18px;
  font-weight: 600;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px;
}

.text-link {
  border-bottom: 3px solid var(--ink);
  font-weight: 900;
}

.hero-facts {
  display: flex;
  flex-wrap: wrap;
  margin: 28px 0 0;
  padding: 0;
  gap: 10px;
  list-style: none;
}

.hero-facts li {
  padding: 4px 10px;
  border: 2px solid var(--ink);
  background: var(--paper);
  font-size: 14px;
  font-weight: 800;
}

.hero-visual {
  position: relative;
  display: flex;
  justify-content: center;
  min-height: 520px;
}

.phone {
  position: relative;
  width: min(100%, 270px);
  padding: 10px;
  border: 5px solid var(--ink);
  border-radius: 28px;
  background: var(--ink);
  box-shadow: 15px 15px 0 var(--yellow);
}

.phone img {
  width: 100%;
  max-width: 400px;
  border-radius: 17px;
}

.phone.secondary {
  position: absolute;
  right: 0;
  bottom: -26px;
  width: 190px;
  transform: rotate(7deg);
  box-shadow: 10px 10px 0 var(--cyan);
}

.comic-burst {
  position: absolute;
  top: 40px;
  left: 0;
  width: 110px;
  height: 110px;
  display: grid;
  place-items: center;
  border: 4px solid var(--ink);
  border-radius: 50%;
  background: var(--yellow);
  font-size: 18px;
  font-weight: 900;
  text-align: center;
  transform: rotate(-10deg);
}

.section {
  padding-block: 86px;
}

.section.compact {
  padding-block: 58px;
}

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

.section.cyan-band {
  border-block: 3px solid var(--ink);
  background: var(--cyan);
}

.section.yellow-band {
  border-block: 3px solid var(--ink);
  background: var(--yellow);
}

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

.section-heading h2 {
  margin-bottom: 0;
}

.section-kicker {
  margin: 0 0 8px;
  color: var(--orange-dark);
  font-size: 14px;
  font-weight: 900;
}

.ink-band .section-kicker {
  color: var(--yellow);
}

.stats-strip {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 3px solid var(--ink);
  background: var(--white);
  box-shadow: var(--shadow);
}

.stat {
  min-height: 132px;
  padding: 25px;
  border-right: 3px solid var(--ink);
}

.stat:last-child {
  border-right: 0;
}

.stat strong {
  display: block;
  margin-bottom: 3px;
  color: var(--orange-dark);
  font-size: 32px;
  line-height: 1.2;
}

.stat span {
  color: var(--muted);
  font-weight: 700;
}

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

.feature-card {
  position: relative;
  min-height: 250px;
  padding: 28px;
  border: 3px solid var(--ink);
  border-radius: 6px;
  background: var(--white);
}

.feature-card:nth-child(2n) {
  background: #fff3bd;
}

.feature-card:nth-child(3n) {
  background: #dff7f8;
}

.feature-number {
  display: grid;
  width: 44px;
  height: 44px;
  margin-bottom: 20px;
  place-items: center;
  border: 3px solid var(--ink);
  border-radius: 50%;
  background: var(--orange);
  font-weight: 900;
}

.feature-card p {
  margin: 0;
  color: #45434a;
}

.screens-controls {
  display: flex;
  gap: 8px;
}

.icon-btn {
  width: 46px;
  height: 46px;
  border: 3px solid currentColor;
  border-radius: 50%;
  color: var(--white);
  background: transparent;
  font-size: 24px;
  cursor: pointer;
}

.screens-track {
  display: grid;
  grid-auto-columns: minmax(230px, 290px);
  grid-auto-flow: column;
  overflow-x: auto;
  padding: 10px 8px 24px;
  gap: 22px;
  scroll-behavior: smooth;
  scroll-snap-type: x mandatory;
  scrollbar-color: var(--orange) #343640;
}

.screen-item {
  margin: 0;
  scroll-snap-align: start;
}

.screen-button {
  width: 100%;
  padding: 0;
  border: 0;
  border-radius: 22px;
  background: transparent;
  cursor: zoom-in;
}

.screen-button img {
  width: 100%;
  max-width: 400px;
  border: 5px solid var(--white);
  border-radius: 22px;
  box-shadow: 8px 8px 0 var(--orange);
}

.screen-item figcaption {
  margin-top: 17px;
  font-weight: 800;
}

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

.path-card {
  display: grid;
  grid-template-columns: 108px 1fr;
  min-height: 220px;
  overflow: hidden;
  border: 3px solid var(--ink);
  border-radius: 6px;
  background: var(--white);
  box-shadow: var(--shadow);
}

.path-mark {
  display: grid;
  place-items: center;
  color: var(--white);
  background: var(--orange);
  font-size: 46px;
  font-weight: 900;
}

.path-card:nth-child(2) .path-mark {
  color: var(--ink);
  background: var(--cyan);
}

.path-content {
  padding: 26px;
}

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

.path-content a {
  border-bottom: 3px solid var(--orange);
  font-weight: 900;
}

.reviews-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 38px;
}

.quote-stack {
  display: grid;
  gap: 16px;
}

blockquote {
  margin: 0;
  padding: 24px;
  border: 3px solid var(--ink);
  border-left: 10px solid var(--orange);
  background: var(--white);
}

blockquote p {
  margin: 0 0 12px;
}

blockquote cite {
  color: var(--muted);
  font-size: 14px;
  font-style: normal;
  font-weight: 800;
}

.rating-panel {
  display: grid;
  align-content: center;
  min-height: 320px;
  padding: 34px;
  border: 3px solid var(--ink);
  background: var(--yellow);
  box-shadow: var(--shadow);
}

.rating-value {
  font-size: 72px;
  font-weight: 900;
  line-height: 1;
}

.stars {
  margin: 12px 0;
  font-size: 27px;
  font-weight: 900;
}

.faq-list {
  border-top: 3px solid var(--ink);
}

.faq-item {
  border-bottom: 3px solid var(--ink);
}

.faq-question {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  padding: 21px 2px;
  border: 0;
  color: var(--ink);
  background: transparent;
  font-weight: 900;
  text-align: left;
  cursor: pointer;
}

.faq-question::after {
  content: "+";
  flex: 0 0 34px;
  font-size: 28px;
  text-align: center;
}

.faq-question[aria-expanded="true"]::after {
  content: "\2212";
}

.faq-answer {
  display: none;
  max-width: 900px;
  padding: 0 44px 22px 2px;
  color: #46444b;
}

.faq-answer p {
  margin: 0;
}

.faq-answer.is-open {
  display: block;
}

.bottom-cta {
  border-top: 3px solid var(--ink);
  color: var(--white);
  background: var(--orange);
}

.bottom-cta-grid {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 250px;
  gap: 40px;
}

.bottom-cta h2 {
  margin-bottom: 10px;
}

.bottom-cta p {
  max-width: 700px;
  margin: 0;
  font-weight: 700;
}

.site-footer {
  padding: 44px 0 28px;
  color: #d9d9df;
  background: var(--ink);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: start;
  padding-bottom: 28px;
  gap: 50px;
  border-bottom: 1px solid #555761;
}

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

.footer-brand p {
  max-width: 620px;
  margin: 14px 0 0;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
}

.footer-links a {
  color: var(--white);
  border-bottom: 1px solid transparent;
}

.footer-links a:hover {
  border-color: var(--yellow);
}

.disclaimer,
.copyright {
  margin: 20px 0 0;
  font-size: 13px;
}

.copyright {
  color: #aaaab2;
}

.sub-hero {
  border-bottom: 3px solid var(--ink);
  background: var(--yellow);
}

.sub-hero.cyan {
  background: var(--cyan);
}

.sub-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 330px;
  align-items: center;
  min-height: 430px;
  padding-block: 54px;
  gap: 60px;
}

.sub-hero h1 {
  max-width: 760px;
  font-size: clamp(38px, 6vw, 68px);
}

.sub-hero p {
  max-width: 740px;
  margin: 0;
  font-size: 18px;
  font-weight: 650;
}

.sub-hero img {
  width: 100%;
  max-width: 280px;
  margin-inline: auto;
  border: 5px solid var(--ink);
  border-radius: 24px;
  box-shadow: 12px 12px 0 var(--orange);
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  margin: 0 0 22px;
  padding: 0;
  gap: 8px;
  list-style: none;
  font-size: 14px;
  font-weight: 800;
}

.breadcrumb li:not(:last-child)::after {
  content: "/";
  margin-left: 8px;
}

.content-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  align-items: start;
  gap: 58px;
}

.article h2 {
  margin-top: 62px;
  margin-bottom: 22px;
  font-size: 34px;
}

.article h2:first-child {
  margin-top: 0;
}

.article h3 {
  margin-top: 34px;
}

.article p {
  margin: 0 0 18px;
}

.article a:not(.download-btn) {
  color: #b6370b;
  border-bottom: 2px solid currentColor;
  font-weight: 800;
}

.toc {
  position: sticky;
  top: 98px;
  padding: 22px;
  border: 3px solid var(--ink);
  background: var(--white);
  box-shadow: 5px 5px 0 var(--ink);
}

.toc strong {
  display: block;
  margin-bottom: 10px;
  font-size: 18px;
}

.toc ol {
  margin: 0;
  padding-left: 20px;
}

.toc a {
  border-bottom: 1px solid transparent;
}

.toc a:hover {
  border-color: var(--orange);
}

.step-list {
  display: grid;
  gap: 28px;
  margin-top: 28px;
}

.step {
  display: grid;
  grid-template-columns: 66px 1fr;
  gap: 22px;
}

.step-index {
  display: grid;
  width: 62px;
  height: 62px;
  place-items: center;
  border: 3px solid var(--ink);
  border-radius: 50%;
  background: var(--orange);
  font-size: 24px;
  font-weight: 900;
}

.step-body {
  padding: 22px;
  border: 3px solid var(--ink);
  background: var(--white);
}

.step-body h3 {
  margin-top: 0;
}

.step-body p:last-child {
  margin-bottom: 0;
}

.callout {
  margin: 28px 0;
  padding: 22px 24px;
  border: 3px solid var(--ink);
  border-left: 12px solid var(--cyan);
  background: #e6fbfc;
}

.callout.warning {
  border-left-color: var(--orange);
  background: #fff2bd;
}

.callout strong {
  display: block;
  margin-bottom: 6px;
}

.check-list {
  margin: 0 0 24px;
  padding: 0;
  list-style: none;
}

.check-list li {
  position: relative;
  margin-bottom: 10px;
  padding-left: 31px;
}

.check-list li::before {
  content: "\2713";
  position: absolute;
  top: 1px;
  left: 0;
  width: 22px;
  height: 22px;
  border: 2px solid var(--ink);
  background: var(--yellow);
  font-size: 14px;
  font-weight: 900;
  line-height: 18px;
  text-align: center;
}

.article-figure {
  margin: 28px 0;
}

.article-figure img {
  width: min(100%, 360px);
  max-width: 400px;
  margin-inline: auto;
  border: 5px solid var(--ink);
  border-radius: 22px;
  box-shadow: 9px 9px 0 var(--orange);
}

.article-figure figcaption {
  max-width: 560px;
  margin: 16px auto 0;
  color: var(--muted);
  font-size: 14px;
  text-align: center;
}

.mini-nav {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  margin-top: 44px;
  gap: 18px;
}

.mini-nav a {
  padding: 20px;
  border: 3px solid var(--ink) !important;
  color: var(--ink) !important;
  background: var(--white);
  box-shadow: 4px 4px 0 var(--ink);
}

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

.faq-page .faq-question {
  padding-inline: 20px;
  font-size: 18px;
}

.faq-page .faq-answer {
  max-width: none;
  padding-inline: 20px 56px;
  padding-bottom: 25px;
}

.lightbox {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: none;
  place-items: center;
  padding: 28px;
  background: rgba(23, 24, 32, 0.92);
}

.lightbox.is-open {
  display: grid;
}

.lightbox img {
  width: auto;
  max-width: min(400px, 90vw);
  max-height: 86vh;
  border: 5px solid var(--white);
  border-radius: 20px;
}

.lightbox-close {
  position: absolute;
  top: 20px;
  right: 20px;
  width: 46px;
  height: 46px;
  border: 3px solid var(--white);
  border-radius: 50%;
  color: var(--white);
  background: var(--ink);
  font-size: 28px;
  line-height: 1;
  cursor: pointer;
}

@media (max-width: 960px) {
  .menu-toggle {
    display: block;
  }

  .nav-links {
    position: fixed;
    inset: 72px 0 auto 0;
    display: none;
    margin: 0;
    padding: 20px;
    border-bottom: 3px solid var(--ink);
    background: var(--paper);
  }

  .nav-links.is-open {
    display: grid;
  }

  .nav-links a:not(.download-btn) {
    padding: 14px 4px;
  }

  .hero-grid,
  .sub-hero-grid {
    grid-template-columns: 1fr 330px;
    gap: 32px;
  }

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

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

  .toc {
    position: static;
    order: -1;
  }
}

@media (max-width: 760px) {
  .container {
    width: min(calc(100% - 24px), var(--container));
  }

  .site-header,
  .nav-wrap {
    min-height: 64px;
  }

  .nav-links {
    top: 64px;
  }

  .brand {
    font-size: 20px;
  }

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

  .hero-grid,
  .sub-hero-grid {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-block: 42px 58px;
  }

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

  .hero-visual {
    min-height: 470px;
  }

  .hero-visual .phone {
    width: 235px;
  }

  .phone.secondary {
    right: 4%;
    width: 155px;
  }

  .comic-burst {
    left: 2%;
    width: 90px;
    height: 90px;
    font-size: 15px;
  }

  .stats-strip,
  .feature-grid,
  .path-grid,
  .reviews-grid,
  .mini-nav {
    grid-template-columns: 1fr;
  }

  .stat {
    min-height: auto;
    border-right: 0;
    border-bottom: 3px solid var(--ink);
  }

  .stat:last-child {
    border-bottom: 0;
  }

  .section {
    padding-block: 62px;
  }

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

  .path-card {
    grid-template-columns: 76px 1fr;
  }

  .bottom-cta-grid,
  .footer-grid {
    align-items: flex-start;
    flex-direction: column;
  }

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

  .bottom-cta-grid {
    padding-block: 48px;
  }

  .sub-hero img {
    max-width: 230px;
  }

  .step {
    grid-template-columns: 48px 1fr;
    gap: 12px;
  }

  .step-index {
    width: 46px;
    height: 46px;
    font-size: 18px;
  }

  .step-body {
    padding: 18px;
  }
}

@media (max-width: 420px) {
  h1 {
    font-size: 38px;
  }

  h2 {
    font-size: 30px;
  }

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

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

  .phone.secondary {
    right: 0;
  }

  .comic-burst {
    left: 0;
  }

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

  .path-mark {
    min-height: 72px;
  }

  .faq-page .faq-question {
    font-size: 16px;
  }
}

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

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