:root {
  --green: #5bae3b;
  --green-dark: #2f6f27;
  --green-soft: #eaf7df;
  --yellow: #f4d84a;
  --yellow-soft: #fff8cb;
  --coral: #ff7867;
  --coral-soft: #fff0ed;
  --ink: #242825;
  --muted: #667069;
  --line: #dce5dc;
  --surface: #ffffff;
  --canvas: #f7faf6;
  --shadow: 0 18px 48px rgba(36, 40, 37, 0.12);
  --container: 1160px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 88px;
}

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

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

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

button,
input {
  font: inherit;
}

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

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

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

.skip-link {
  position: fixed;
  z-index: 1000;
  top: 10px;
  left: 10px;
  padding: 8px 14px;
  transform: translateY(-150%);
  border: 2px solid var(--ink);
  background: var(--yellow);
  font-weight: 800;
}

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

.site-header {
  position: sticky;
  z-index: 100;
  top: 0;
  border-bottom: 1px solid rgba(36, 40, 37, 0.1);
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
}

.nav-row {
  display: flex;
  min-height: 72px;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.brand {
  display: inline-flex;
  flex: none;
  align-items: center;
  gap: 10px;
  font-size: 21px;
  font-weight: 900;
}

.brand img {
  width: 42px;
  height: 42px;
  border: 2px solid var(--ink);
  border-radius: 8px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}

.site-nav a:not(.button) {
  padding: 8px 12px;
  border-radius: 6px;
  color: #3e4741;
  font-size: 14px;
  font-weight: 700;
}

.site-nav a:not(.button):hover,
.site-nav a[aria-current="page"]:not(.button) {
  background: var(--green-soft);
  color: var(--green-dark);
}

.menu-button {
  display: none;
  width: 42px;
  height: 42px;
  padding: 0;
  border: 2px solid var(--ink);
  border-radius: 6px;
  background: var(--surface);
  cursor: pointer;
}

.menu-button span,
.menu-button::before,
.menu-button::after {
  display: block;
  width: 20px;
  height: 2px;
  margin: 5px auto;
  background: var(--ink);
  content: "";
}

.button {
  display: inline-flex;
  min-height: 46px;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 10px 20px;
  border: 2px solid var(--ink);
  border-radius: 6px;
  background: var(--yellow);
  box-shadow: 4px 4px 0 var(--ink);
  color: var(--ink);
  font-weight: 900;
  line-height: 1.2;
  cursor: pointer;
  transition: transform 160ms ease, box-shadow 160ms ease;
}

.button:hover {
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0 var(--ink);
}

.button::before {
  width: 18px;
  height: 18px;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%23242825' stroke-width='2.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M21 15v4a2 2 0 0 1-2 2H5a2 2 0 0 1-2-2v-4'/%3E%3Cpolyline points='7 10 12 15 17 10'/%3E%3Cline x1='12' y1='15' x2='12' y2='3'/%3E%3C/svg%3E");
  background-size: contain;
  content: "";
}

.button-secondary {
  background: var(--surface);
  box-shadow: none;
}

.button-secondary::before,
.text-link::before {
  display: none;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--green-dark);
  font-weight: 900;
}

.text-link::after {
  content: "→";
  transition: transform 160ms ease;
}

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

.eyebrow {
  display: inline-block;
  margin: 0 0 14px;
  padding: 4px 9px;
  border: 1px solid currentColor;
  border-radius: 4px;
  color: var(--green-dark);
  font-size: 13px;
  font-weight: 900;
}

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

.hero::after {
  position: absolute;
  right: -65px;
  bottom: -55px;
  width: 230px;
  height: 170px;
  border: 3px solid var(--ink);
  background: var(--coral);
  content: "";
  transform: rotate(-8deg);
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  min-height: 620px;
  grid-template-columns: minmax(0, 1fr) minmax(420px, 0.86fr);
  align-items: center;
  gap: 54px;
  padding-block: 70px 58px;
}

.hero-copy h1,
.page-hero h1 {
  max-width: 720px;
  margin: 0;
  font-size: 70px;
  line-height: 1.04;
  letter-spacing: 0;
}

.hero-copy h1 span {
  position: relative;
  z-index: 0;
}

.hero-copy h1 span::after {
  position: absolute;
  z-index: -1;
  right: -4px;
  bottom: 6px;
  left: -4px;
  height: 16px;
  background: var(--yellow);
  content: "";
}

.hero-copy > p {
  max-width: 610px;
  margin: 24px 0 28px;
  color: #48514b;
  font-size: 18px;
}

.hero-actions,
.inline-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.micro-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
  margin: 27px 0 0;
  padding: 0;
  list-style: none;
  color: #4e5851;
  font-size: 14px;
  font-weight: 700;
}

.micro-facts li::before {
  color: var(--green);
  content: "●";
  margin-right: 7px;
}

.phone-stage {
  position: relative;
  min-height: 475px;
}

.phone {
  position: absolute;
  overflow: hidden;
  width: 222px;
  padding: 9px;
  border: 3px solid var(--ink);
  border-radius: 28px;
  background: var(--ink);
  box-shadow: var(--shadow);
}

.phone img {
  width: 100%;
  max-width: 400px;
  height: auto;
  border-radius: 18px;
}

.phone-primary {
  z-index: 2;
  top: 0;
  left: 38px;
  transform: rotate(-3deg);
}

.phone-secondary {
  z-index: 1;
  top: 64px;
  right: 4px;
  transform: rotate(7deg);
}

.hero-note {
  position: absolute;
  z-index: 3;
  right: 12px;
  bottom: 24px;
  max-width: 210px;
  padding: 13px 16px;
  border: 2px solid var(--ink);
  background: var(--yellow);
  box-shadow: 4px 4px 0 var(--ink);
  font-size: 14px;
  font-weight: 900;
  line-height: 1.45;
  transform: rotate(-2deg);
}

.section {
  padding-block: 88px;
}

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

.section-green {
  border-block: 2px solid var(--ink);
  background: var(--green-dark);
  color: #ffffff;
}

.section-yellow {
  border-block: 2px solid var(--ink);
  background: var(--yellow-soft);
}

.section-coral {
  border-block: 2px solid var(--ink);
  background: var(--coral-soft);
}

.section-head {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 28px;
  margin-bottom: 36px;
}

.section-head h2,
.content-heading {
  max-width: 760px;
  margin: 0;
  font-size: 46px;
  line-height: 1.15;
  letter-spacing: 0;
}

.section-head p {
  max-width: 470px;
  margin: 0;
  color: var(--muted);
}

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

.feature-cell {
  min-height: 218px;
  padding: 26px;
  background: var(--surface);
}

.feature-cell:nth-child(2) {
  background: var(--yellow-soft);
}

.feature-cell:nth-child(3) {
  background: var(--green-soft);
}

.feature-cell:nth-child(4) {
  background: var(--coral-soft);
}

.feature-number,
.step-number {
  display: grid;
  width: 38px;
  height: 38px;
  place-items: center;
  border: 2px solid var(--ink);
  border-radius: 50%;
  background: var(--yellow);
  font-size: 13px;
  font-weight: 900;
}

.feature-cell h3 {
  margin: 24px 0 6px;
  font-size: 20px;
  line-height: 1.35;
}

.feature-cell p {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.showcase-grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  align-items: center;
  gap: 68px;
}

.showcase-copy h2 {
  margin: 0 0 22px;
  font-size: 52px;
  line-height: 1.12;
}

.showcase-copy > p {
  margin: 0 0 24px;
  color: rgba(255, 255, 255, 0.78);
}

.tick-list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.tick-list li {
  position: relative;
  margin: 12px 0;
  padding-left: 30px;
}

.tick-list li::before {
  position: absolute;
  top: 3px;
  left: 0;
  color: var(--yellow);
  content: "✓";
  font-size: 20px;
  font-weight: 900;
}

.screenshot-rail {
  display: flex;
  align-items: end;
  gap: 18px;
}

.screenshot-item {
  margin: 0;
  text-align: center;
}

.screenshot-item img {
  width: min(100%, 270px);
  max-width: 400px;
  height: auto;
  margin-inline: auto;
  border: 3px solid var(--ink);
  border-radius: 18px;
  box-shadow: 8px 8px 0 var(--yellow);
}

.screenshot-item:nth-child(2) {
  transform: translateY(24px);
}

.screenshot-item figcaption {
  margin-top: 15px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 13px;
}

.category-grid {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 12px;
}

.category-chip {
  min-height: 116px;
  padding: 18px 14px;
  border: 2px solid var(--ink);
  border-radius: 6px;
  background: var(--surface);
  text-align: center;
}

.category-chip:nth-child(3n + 1) {
  box-shadow: inset 0 7px 0 var(--green);
}

.category-chip:nth-child(3n + 2) {
  box-shadow: inset 0 7px 0 var(--yellow);
}

.category-chip:nth-child(3n) {
  box-shadow: inset 0 7px 0 var(--coral);
}

.category-chip strong,
.category-chip span {
  display: block;
}

.category-chip strong {
  margin-top: 12px;
}

.category-chip span {
  color: var(--muted);
  font-size: 13px;
}

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

.path-card,
.review-card,
.related-card {
  padding: 28px;
  border: 2px solid var(--ink);
  border-radius: 8px;
  background: var(--surface);
}

.path-card h3,
.related-card h3 {
  margin: 14px 0 8px;
  font-size: 22px;
}

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

.path-tag {
  color: var(--green-dark);
  font-size: 12px;
  font-weight: 900;
}

.review-card blockquote {
  margin: 0;
  font-weight: 700;
}

.review-card footer {
  margin-top: 18px;
  color: var(--muted);
  font-size: 13px;
}

.stars {
  color: #c18b00;
  letter-spacing: 0;
}

.stat-line {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  margin-top: 18px;
  border: 2px solid var(--ink);
  background: var(--ink);
  gap: 1px;
}

.stat {
  padding: 20px;
  background: var(--green-soft);
  text-align: center;
}

.stat strong,
.stat span {
  display: block;
}

.stat strong {
  font-size: 27px;
}

.stat span {
  color: var(--muted);
  font-size: 12px;
}

.faq-list {
  display: grid;
  gap: 12px;
}

.faq-item {
  border: 2px solid var(--ink);
  border-radius: 6px;
  background: var(--surface);
}

.faq-item summary {
  display: flex;
  min-height: 62px;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  padding: 14px 18px;
  font-weight: 900;
  cursor: pointer;
  list-style: none;
}

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

.faq-item summary::after {
  flex: none;
  width: 27px;
  height: 27px;
  border: 2px solid var(--ink);
  border-radius: 50%;
  background: var(--yellow);
  content: "+";
  text-align: center;
  line-height: 23px;
}

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

.faq-answer {
  padding: 0 18px 18px;
  color: var(--muted);
}

.faq-answer p {
  margin: 0;
}

.faq-answer a {
  color: var(--green-dark);
  font-weight: 800;
  text-decoration: underline;
}

.bottom-cta {
  padding-block: 70px;
  border-top: 2px solid var(--ink);
  background: var(--yellow);
}

.cta-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.cta-row h2 {
  margin: 0;
  font-size: 44px;
  line-height: 1.16;
}

.cta-row p {
  margin: 8px 0 0;
}

.cta-row .button {
  background: var(--surface);
}

.site-footer {
  padding-block: 46px 24px;
  background: var(--ink);
  color: #ffffff;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 48px;
}

.site-footer .brand {
  margin-bottom: 14px;
}

.footer-copy {
  max-width: 480px;
  margin: 0;
  color: rgba(255, 255, 255, 0.68);
  font-size: 14px;
}

.footer-title {
  margin: 0 0 12px;
  color: var(--yellow);
  font-size: 14px;
}

.footer-links {
  display: grid;
  gap: 8px;
}

.footer-links a {
  color: rgba(255, 255, 255, 0.78);
  font-size: 14px;
}

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

.disclaimer {
  margin: 34px 0 0;
  padding-top: 20px;
  border-top: 1px solid rgba(255, 255, 255, 0.16);
  color: rgba(255, 255, 255, 0.58);
  font-size: 12px;
}

.copyright {
  margin: 10px 0 0;
  color: rgba(255, 255, 255, 0.46);
  font-size: 12px;
}

.page-hero {
  overflow: hidden;
  padding-block: 76px 66px;
  border-bottom: 2px solid var(--ink);
  background: var(--yellow-soft);
}

.page-hero .eyebrow {
  color: var(--ink);
}

.page-hero p {
  max-width: 720px;
  margin: 22px 0 0;
  color: #535d56;
  font-size: 18px;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 0 0 22px;
  color: var(--muted);
  font-size: 13px;
}

.breadcrumb a {
  color: var(--green-dark);
  font-weight: 800;
}

.article-layout {
  display: grid;
  grid-template-columns: 230px minmax(0, 1fr);
  align-items: start;
  gap: 54px;
}

.article-nav {
  position: sticky;
  top: 96px;
  padding: 18px;
  border: 2px solid var(--ink);
  border-radius: 6px;
  background: var(--surface);
}

.article-nav strong {
  display: block;
  margin-bottom: 10px;
}

.article-nav a {
  display: block;
  padding: 7px 0;
  border-bottom: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.article-nav a:last-child {
  border-bottom: 0;
}

.article-nav a:hover {
  color: var(--green-dark);
}

.article-content section {
  margin-bottom: 70px;
}

.article-content h2 {
  margin: 0 0 20px;
  font-size: 38px;
  line-height: 1.2;
}

.article-content h3 {
  margin: 25px 0 8px;
  font-size: 21px;
}

.article-content p {
  margin: 0 0 16px;
  color: #4d5750;
}

.step-list {
  display: grid;
  gap: 16px;
}

.step-card {
  display: grid;
  grid-template-columns: 54px minmax(0, 1fr);
  gap: 18px;
  padding: 24px;
  border: 2px solid var(--ink);
  border-radius: 8px;
  background: var(--surface);
}

.step-card h3 {
  margin: 2px 0 8px;
}

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

.info-box,
.warning-box {
  margin: 24px 0;
  padding: 20px 22px;
  border: 2px solid var(--ink);
  border-left-width: 9px;
  background: var(--green-soft);
}

.warning-box {
  border-left-color: var(--coral);
  background: var(--coral-soft);
}

.info-box {
  border-left-color: var(--green);
}

.info-box strong,
.warning-box strong {
  display: block;
  margin-bottom: 5px;
}

.checklist {
  display: grid;
  gap: 10px;
  margin: 22px 0;
}

.check-row {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
  cursor: pointer;
}

.check-row input {
  width: 20px;
  height: 20px;
  margin-top: 3px;
  accent-color: var(--green-dark);
}

.checklist-status {
  color: var(--green-dark);
  font-size: 13px;
  font-weight: 900;
}

.data-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--surface);
}

.data-table th,
.data-table td {
  padding: 14px 16px;
  border: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
}

.data-table th {
  background: var(--green-soft);
}

.faq-tools {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
}

.faq-search {
  min-width: 0;
  flex: 1;
  min-height: 50px;
  padding: 10px 15px;
  border: 2px solid var(--ink);
  border-radius: 6px;
  background: var(--surface);
}

.faq-count {
  flex: none;
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}

.empty-state {
  display: none;
  padding: 30px;
  border: 2px dashed var(--ink);
  background: var(--yellow-soft);
  text-align: center;
}

.empty-state.is-visible {
  display: block;
}

.feature-detail-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
}

.feature-detail {
  padding: 24px;
  border: 2px solid var(--ink);
  border-radius: 8px;
  background: var(--surface);
}

.feature-detail h3 {
  margin-top: 0;
}

.feature-detail ul {
  margin: 12px 0 0;
  padding-left: 20px;
  color: var(--muted);
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 420ms ease, transform 420ms ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

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

  .reveal {
    opacity: 1;
    transform: none;
    transition: none;
  }
}

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

  .site-nav {
    position: absolute;
    top: 71px;
    right: 0;
    left: 0;
    display: none;
    padding: 16px 20px 20px;
    border-bottom: 2px solid var(--ink);
    background: var(--surface);
  }

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

  .site-nav a:not(.button) {
    padding: 11px 12px;
  }

  .hero-grid {
    grid-template-columns: 1fr 380px;
    gap: 24px;
  }

  .phone {
    width: 198px;
  }

  .phone-primary {
    left: 12px;
  }

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

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

  .screenshot-rail {
    justify-content: center;
  }

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

@media (max-width: 760px) {
  .container {
    width: min(calc(100% - 28px), var(--container));
  }

  .site-nav .button {
    width: 100%;
  }

  .hero-grid {
    min-height: auto;
    grid-template-columns: 1fr;
    padding-block: 54px 40px;
  }

  .hero-copy h1,
  .page-hero h1 {
    font-size: 44px;
  }

  .phone-stage {
    min-height: 410px;
  }

  .phone {
    width: 180px;
  }

  .phone-primary {
    left: max(0px, calc(50% - 175px));
  }

  .phone-secondary {
    right: max(0px, calc(50% - 175px));
  }

  .hero-note {
    bottom: 4px;
  }

  .section {
    padding-block: 64px;
  }

  .section-head,
  .cta-row {
    align-items: flex-start;
    flex-direction: column;
  }

  .path-grid,
  .review-grid,
  .related-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

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

  .article-nav {
    position: static;
  }
}

@media (max-width: 560px) {
  .brand {
    font-size: 19px;
  }

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

  .hero-copy h1,
  .page-hero h1 {
    font-size: 38px;
  }

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

  .hero-actions .button,
  .hero-actions .button-secondary {
    width: 100%;
  }

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

  .screenshot-rail {
    overflow-x: auto;
    justify-content: flex-start;
    padding: 4px 8px 26px;
    scroll-snap-type: x mandatory;
  }

  .screenshot-item {
    min-width: 78%;
    scroll-snap-align: center;
  }

  .screenshot-item:nth-child(2) {
    transform: none;
  }

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

  .stat-line {
    grid-template-columns: 1fr;
  }

  .faq-tools {
    align-items: stretch;
    flex-direction: column;
  }

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

  .data-table {
    display: block;
    overflow-x: auto;
  }
}