:root {
  --ink: #352936;
  --muted: #756a74;
  --paper: #fffaf4;
  --white: #ffffff;
  --blush: #ffe9ed;
  --pink: #ff5c7a;
  --pink-dark: #d93c5d;
  --yellow: #ffd166;
  --mint: #8bd8c7;
  --mint-dark: #267b70;
  --line: #3f3240;
  --shadow: 6px 6px 0 rgba(63, 50, 64, 0.12);
  --container: 1160px;
}

* {
  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%;
}

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

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

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

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 100;
  padding: 8px 14px;
  color: var(--white);
  background: var(--ink);
  transform: translateY(-150%);
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  border-bottom: 2px solid var(--line);
  background: rgba(255, 250, 244, 0.96);
  backdrop-filter: blur(12px);
}

.header-inner {
  min-height: 74px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 11px;
  flex: 0 0 auto;
  font-size: 20px;
  font-weight: 900;
}

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

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

.site-nav a {
  padding: 8px 12px;
  border-bottom: 3px solid transparent;
  font-weight: 700;
}

.site-nav a:hover,
.site-nav a.active {
  color: var(--pink-dark);
  border-color: var(--pink);
}

.site-nav .nav-download {
  margin-left: 8px;
  padding: 9px 18px;
  color: var(--white);
  border: 2px solid var(--line);
  border-radius: 6px;
  background: var(--pink);
  box-shadow: 3px 3px 0 var(--line);
}

.site-nav .nav-download:hover {
  color: var(--white);
  border-color: var(--line);
  transform: translate(2px, 2px);
  box-shadow: 1px 1px 0 var(--line);
}

.menu-toggle {
  width: 44px;
  height: 44px;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 0;
  border: 2px solid var(--line);
  border-radius: 6px;
  background: var(--white);
  cursor: pointer;
}

.menu-icon,
.menu-icon::before,
.menu-icon::after {
  width: 20px;
  height: 2px;
  display: block;
  background: var(--ink);
  content: "";
  transition: transform 0.2s ease;
}

.menu-icon {
  position: relative;
}

.menu-icon::before {
  position: absolute;
  top: -7px;
}

.menu-icon::after {
  position: absolute;
  top: 7px;
}

.hero {
  position: relative;
  overflow: hidden;
  border-bottom: 2px solid var(--line);
  background-color: var(--blush);
  background-image: radial-gradient(circle, rgba(255, 92, 122, 0.2) 1.5px, transparent 1.5px);
  background-size: 18px 18px;
}

.hero::after {
  position: absolute;
  right: 6%;
  bottom: 11%;
  width: 86px;
  height: 86px;
  border: 18px solid var(--yellow);
  border-radius: 50%;
  content: "";
  transform: rotate(-15deg);
}

.hero-grid {
  min-height: 650px;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  align-items: center;
  gap: 54px;
  padding-block: 64px;
}

.eyebrow {
  display: inline-block;
  margin-bottom: 18px;
  padding: 5px 12px;
  color: var(--ink);
  border: 2px solid var(--line);
  background: var(--yellow);
  font-size: 14px;
  font-weight: 900;
  transform: rotate(-1deg);
}

.hero h1,
.page-hero h1 {
  max-width: 720px;
  margin: 0 0 22px;
  font-size: 68px;
  line-height: 1.05;
  letter-spacing: 0;
}

.hero-copy > p {
  max-width: 640px;
  margin: 0;
  color: #51444f;
  font-size: 18px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 30px;
}

.primary-button,
.secondary-button {
  min-height: 48px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  padding: 11px 22px;
  border: 2px solid var(--line);
  border-radius: 6px;
  font-weight: 900;
  cursor: pointer;
}

.primary-button {
  color: var(--white);
  background: var(--pink);
  box-shadow: 4px 4px 0 var(--line);
}

.primary-button::after {
  content: "\2192";
  font-size: 20px;
  line-height: 1;
}

.primary-button:hover {
  color: var(--white);
  background: var(--pink-dark);
  transform: translate(2px, 2px);
  box-shadow: 2px 2px 0 var(--line);
}

.secondary-button {
  background: var(--white);
}

.secondary-button:hover {
  background: var(--yellow);
}

.trust-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  margin: 28px 0 0;
  padding: 0;
  list-style: none;
  color: #554a53;
  font-size: 14px;
  font-weight: 700;
}

.trust-row li::before {
  width: 8px;
  height: 8px;
  display: inline-block;
  margin-right: 8px;
  border: 2px solid var(--line);
  border-radius: 50%;
  background: var(--mint);
  content: "";
}

.phone-stage {
  position: relative;
  min-height: 500px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.phone-frame {
  position: relative;
  z-index: 2;
  width: 258px;
  padding: 10px;
  border: 3px solid var(--line);
  border-radius: 28px;
  background: var(--ink);
  box-shadow: 14px 14px 0 rgba(255, 92, 122, 0.24);
  transform: rotate(3deg);
}

.phone-frame img {
  width: 100%;
  border-radius: 18px;
}

.speech-note {
  position: absolute;
  z-index: 3;
  right: 0;
  top: 54px;
  width: 175px;
  padding: 14px 16px;
  border: 2px solid var(--line);
  border-radius: 8px;
  background: var(--yellow);
  box-shadow: var(--shadow);
  font-weight: 900;
  line-height: 1.45;
  transform: rotate(3deg);
}

.speech-note::after {
  position: absolute;
  bottom: -14px;
  left: 24px;
  width: 20px;
  height: 20px;
  border-right: 2px solid var(--line);
  border-bottom: 2px solid var(--line);
  background: var(--yellow);
  content: "";
  transform: rotate(45deg);
}

.mini-panel {
  position: absolute;
  z-index: 1;
  left: 8px;
  bottom: 56px;
  width: 190px;
  padding: 16px;
  border: 2px solid var(--line);
  background: var(--white);
  box-shadow: var(--shadow);
  transform: rotate(-4deg);
}

.mini-panel strong,
.mini-panel span {
  display: block;
}

.mini-panel strong {
  color: var(--pink-dark);
  font-size: 24px;
}

.section {
  padding-block: 88px;
}

.section-compact {
  padding-block: 62px;
}

.section-label {
  margin-bottom: 10px;
  color: var(--pink-dark);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0;
  text-transform: uppercase;
}

.section-heading {
  max-width: 720px;
  margin: 0 0 36px;
  font-size: 44px;
  line-height: 1.18;
  letter-spacing: 0;
}

.feature-strip {
  border-bottom: 2px solid var(--line);
  background: var(--ink);
  color: var(--white);
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.stat-item {
  min-height: 130px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 24px;
  border-right: 1px solid rgba(255, 255, 255, 0.28);
}

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

.stat-item strong {
  color: var(--yellow);
  font-size: 28px;
}

.stat-item span {
  color: #eee8ed;
  font-size: 14px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
  border-top: 2px solid var(--line);
  border-left: 2px solid var(--line);
}

.feature-item {
  min-height: 220px;
  padding: 32px;
  border-right: 2px solid var(--line);
  border-bottom: 2px solid var(--line);
  background: var(--white);
}

.feature-number {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  margin-bottom: 18px;
  color: var(--ink);
  border: 2px solid var(--line);
  border-radius: 50%;
  background: var(--yellow);
  font-weight: 900;
}

.feature-item:nth-child(2) .feature-number,
.feature-item:nth-child(3) .feature-number {
  background: var(--mint);
}

.feature-item h3 {
  margin: 0 0 10px;
  font-size: 22px;
}

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

.screens-section {
  overflow: hidden;
  border-block: 2px solid var(--line);
  background: #edf9f6;
}

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

.screen-item {
  margin: 0;
}

.screen-shell {
  max-width: 300px;
  margin-inline: auto;
  padding: 8px;
  border: 2px solid var(--line);
  border-radius: 20px;
  background: var(--ink);
  box-shadow: 7px 7px 0 rgba(38, 123, 112, 0.22);
}

.screen-shell img {
  width: 100%;
  max-width: 400px;
  height: auto;
  border-radius: 13px;
}

.screen-item figcaption {
  margin-top: 18px;
  font-weight: 900;
  text-align: center;
}

.screen-item figcaption span {
  display: block;
  color: var(--muted);
  font-size: 13px;
  font-weight: 400;
}

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

.route-card {
  position: relative;
  min-height: 300px;
  padding: 36px;
  overflow: hidden;
  border: 2px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  box-shadow: var(--shadow);
}

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

.route-card::after {
  position: absolute;
  right: -32px;
  bottom: -46px;
  width: 150px;
  height: 150px;
  border: 22px solid var(--mint);
  border-radius: 50%;
  content: "";
}

.route-card:nth-child(2)::after {
  border-color: var(--yellow);
}

.route-card h3 {
  position: relative;
  z-index: 1;
  margin: 8px 0 12px;
  font-size: 28px;
}

.route-card p {
  position: relative;
  z-index: 1;
  max-width: 420px;
  margin: 0 0 22px;
  color: var(--muted);
}

.text-link {
  position: relative;
  z-index: 1;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--pink-dark);
  border-bottom: 2px solid currentColor;
  font-weight: 900;
}

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

.review-band .section-label {
  color: var(--yellow);
}

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

.review-card {
  margin: 0;
  padding: 26px;
  color: var(--ink);
  border: 2px solid var(--line);
  border-radius: 6px;
  background: var(--white);
  box-shadow: 5px 5px 0 var(--pink);
}

.review-card p {
  margin: 0 0 18px;
}

.review-card footer {
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
}

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

.faq-item {
  border-bottom: 2px solid var(--line);
}

.faq-question {
  width: 100%;
  min-height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  padding: 18px 4px;
  color: var(--ink);
  border: 0;
  background: transparent;
  font: inherit;
  font-weight: 900;
  text-align: left;
  cursor: pointer;
}

.faq-question::after {
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  flex: 0 0 auto;
  border: 2px solid var(--line);
  border-radius: 50%;
  background: var(--yellow);
  content: "+";
  font-size: 20px;
  line-height: 1;
}

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

.faq-answer {
  display: none;
  max-width: 900px;
  padding: 0 50px 22px 4px;
  color: var(--muted);
}

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

.faq-answer p {
  margin: 0;
}

.cta-band {
  padding-block: 70px;
  border-block: 2px solid var(--line);
  background: var(--yellow);
}

.cta-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}

.cta-inner h2 {
  max-width: 670px;
  margin: 0 0 8px;
  font-size: 50px;
  line-height: 1.12;
}

.cta-inner p {
  margin: 0;
  color: #5f4e37;
}

.site-footer {
  padding-block: 48px 28px;
  color: #eee7ed;
  background: #292129;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 40px;
}

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

.footer-brand p {
  max-width: 480px;
  color: #cfc4ce;
}

.footer-links strong {
  display: block;
  margin-bottom: 12px;
  color: var(--yellow);
}

.footer-links a {
  display: block;
  width: fit-content;
  margin-block: 7px;
  color: #e5dce4;
}

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

.disclaimer {
  margin: 34px 0 0;
  padding-top: 22px;
  color: #aaa0a9;
  border-top: 1px solid #514651;
  font-size: 13px;
}

.copyright {
  margin: 10px 0 0;
  color: #8f858e;
  font-size: 13px;
}

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

.page-hero::before {
  position: absolute;
  inset: 0;
  opacity: 0.45;
  background-image: radial-gradient(circle, var(--pink) 1.3px, transparent 1.3px);
  background-size: 20px 20px;
  content: "";
}

.page-hero-inner {
  position: relative;
  z-index: 1;
  min-height: 420px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-block: 70px;
}

.page-hero h1 {
  font-size: 62px;
}

.page-hero p {
  max-width: 780px;
  margin: 0;
  color: #554650;
  font-size: 18px;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 24px;
  color: var(--pink-dark);
  font-size: 14px;
  font-weight: 800;
}

.guide-layout {
  display: grid;
  grid-template-columns: 240px minmax(0, 1fr);
  align-items: start;
  gap: 56px;
}

.side-index {
  position: sticky;
  top: 100px;
  padding: 22px;
  border: 2px solid var(--line);
  background: var(--white);
  box-shadow: var(--shadow);
}

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

.side-index a {
  display: block;
  padding: 8px 0;
  color: var(--muted);
  border-bottom: 1px dashed #d8ccd4;
}

.side-index a:hover {
  color: var(--pink-dark);
}

.article-content {
  min-width: 0;
}

.article-lead {
  margin: 0 0 42px;
  padding: 24px 26px;
  border-left: 6px solid var(--pink);
  background: var(--white);
  font-size: 18px;
}

.step-list {
  position: relative;
}

.step-list::before {
  position: absolute;
  top: 30px;
  bottom: 30px;
  left: 29px;
  width: 3px;
  background: var(--pink);
  content: "";
}

.step-block {
  position: relative;
  display: grid;
  grid-template-columns: 62px minmax(0, 1fr);
  gap: 24px;
  padding-bottom: 50px;
}

.step-marker {
  position: relative;
  z-index: 1;
  width: 60px;
  height: 60px;
  display: grid;
  place-items: center;
  border: 3px solid var(--line);
  border-radius: 50%;
  background: var(--yellow);
  font-size: 21px;
  font-weight: 900;
}

.step-body {
  padding: 26px;
  border: 2px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.step-body h2 {
  margin: 0 0 12px;
  font-size: 27px;
}

.step-body p {
  margin: 0 0 14px;
}

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

.check-list {
  margin: 18px 0 0;
  padding: 0;
  list-style: none;
}

.check-list li {
  position: relative;
  margin-block: 9px;
  padding-left: 28px;
}

.check-list li::before {
  position: absolute;
  top: 9px;
  left: 0;
  width: 12px;
  height: 12px;
  border: 2px solid var(--line);
  background: var(--mint);
  content: "";
}

.notice-box {
  margin-block: 34px;
  padding: 24px;
  border: 2px solid var(--line);
  background: #edf9f6;
}

.notice-box h2,
.notice-box h3 {
  margin: 0 0 10px;
}

.notice-box p {
  margin: 0;
}

.article-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 28px;
}

.feature-detail-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
  margin-bottom: 64px;
}

.detail-panel {
  padding: 28px;
  border: 2px solid var(--line);
  border-radius: 8px;
  background: var(--white);
}

.detail-panel:nth-child(2),
.detail-panel:nth-child(3) {
  background: #edf9f6;
}

.detail-panel h2 {
  margin: 0 0 12px;
  font-size: 24px;
}

.detail-panel p {
  margin: 0;
  color: var(--muted);
}

.faq-group {
  margin-top: 50px;
}

.faq-group h2 {
  margin: 0 0 20px;
  font-size: 32px;
}

.related-band {
  border-top: 2px solid var(--line);
  background: var(--white);
}

.related-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}

.related-link {
  display: block;
  padding: 24px;
  border: 2px solid var(--line);
  border-radius: 6px;
  background: var(--paper);
}

.related-link strong,
.related-link span {
  display: block;
}

.related-link strong {
  margin-bottom: 5px;
  color: var(--pink-dark);
  font-size: 20px;
}

.related-link span {
  color: var(--muted);
}

@media (max-width: 920px) {
  .menu-toggle {
    display: flex;
  }

  .site-nav {
    position: fixed;
    top: 74px;
    right: 0;
    bottom: 0;
    width: min(320px, 86vw);
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 22px;
    border-left: 2px solid var(--line);
    background: var(--paper);
    box-shadow: -8px 0 24px rgba(53, 41, 54, 0.12);
  }

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

  .site-nav a {
    padding: 13px 8px;
  }

  .site-nav .nav-download {
    margin: 12px 0 0;
    text-align: center;
  }

  .hero-grid {
    min-height: auto;
    grid-template-columns: 1fr;
    gap: 26px;
    padding-block: 58px;
  }

  .hero h1 {
    font-size: 54px;
  }

  .page-hero h1 {
    font-size: 50px;
  }

  .section-heading {
    font-size: 38px;
  }

  .cta-inner h2 {
    font-size: 42px;
  }

  .phone-stage {
    min-height: 510px;
  }

  .hero::after {
    display: none;
  }

  .screens-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px 20px;
  }

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

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

  .stat-item:nth-child(-n + 2) {
    border-bottom: 1px solid rgba(255, 255, 255, 0.28);
  }

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

  .guide-layout {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .side-index {
    position: static;
  }
}

@media (max-width: 680px) {
  .container {
    width: min(calc(100% - 28px), var(--container));
  }

  .header-inner {
    min-height: 66px;
  }

  .brand {
    font-size: 18px;
  }

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

  .site-nav {
    top: 66px;
  }

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

  .page-hero h1 {
    font-size: 34px;
  }

  .section-heading {
    font-size: 32px;
  }

  .cta-inner h2 {
    font-size: 34px;
  }

  .hero-grid {
    gap: 18px;
    padding-block: 42px 0;
  }

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

  .hero-actions,
  .article-actions {
    flex-direction: column;
  }

  .hero-actions a,
  .article-actions a {
    width: 100%;
  }

  .phone-stage {
    min-height: 148px;
    height: 148px;
    margin-top: 2px;
    overflow: hidden;
  }

  .phone-frame {
    width: 182px;
    box-shadow: 8px 8px 0 rgba(255, 92, 122, 0.24);
    transform: rotate(3deg) translateY(12px);
  }

  .speech-note,
  .mini-panel {
    display: none;
  }

  .section {
    padding-block: 62px;
  }

  .feature-grid,
  .route-grid,
  .feature-detail-grid,
  .related-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .feature-item {
    min-height: auto;
    padding: 24px;
  }

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

  .screen-item {
    max-width: 320px;
    margin-inline: auto;
  }

  .route-card {
    min-height: 280px;
    padding: 28px;
  }

  .stat-item strong {
    font-size: 21px;
    word-break: keep-all;
  }

  .cta-inner {
    align-items: stretch;
    flex-direction: column;
  }

  .cta-inner .primary-button {
    width: 100%;
  }

  .page-hero-inner {
    min-height: 350px;
    padding-block: 56px;
  }

  .step-block {
    grid-template-columns: 50px minmax(0, 1fr);
    gap: 14px;
  }

  .step-marker {
    width: 48px;
    height: 48px;
    font-size: 17px;
  }

  .step-list::before {
    left: 23px;
  }

  .step-body {
    padding: 20px;
  }

  .step-body h2 {
    font-size: 23px;
  }
}

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

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