:root {
  --ink: #172033;
  --ink-soft: #4d5668;
  --paper: #f7f7f4;
  --white: #ffffff;
  --coral: #ff5f7e;
  --coral-dark: #d93f62;
  --cyan: #30c5d2;
  --lemon: #ffd65a;
  --line: #dfe3e8;
  --shadow: 0 18px 45px rgba(23, 32, 51, 0.12);
  --radius: 8px;
  --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;
  letter-spacing: 0;
}

body::before {
  position: fixed;
  inset: 0;
  z-index: -2;
  background-image:
    linear-gradient(rgba(23, 32, 51, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(23, 32, 51, 0.035) 1px, transparent 1px);
  background-size: 28px 28px;
  content: "";
}

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

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

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

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

.skip-link {
  position: fixed;
  top: 10px;
  left: 10px;
  z-index: 1000;
  padding: 8px 14px;
  transform: translateY(-150%);
  border-radius: 4px;
  color: var(--white);
  background: var(--ink);
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid rgba(23, 32, 51, 0.12);
  background: rgba(247, 247, 244, 0.95);
  backdrop-filter: blur(14px);
}

.site-header.is-scrolled {
  box-shadow: 0 8px 24px rgba(23, 32, 51, 0.08);
}

.nav-wrap {
  display: flex;
  min-height: 72px;
  align-items: center;
  gap: 28px;
}

.brand {
  display: inline-flex;
  align-items: center;
  flex-shrink: 0;
  gap: 10px;
  font-size: 22px;
  font-weight: 900;
}

.brand img {
  width: 40px;
  height: 40px;
  border-radius: 8px;
}

.main-nav {
  display: flex;
  margin-left: auto;
  align-items: center;
  gap: 4px;
}

.main-nav a:not(.button) {
  padding: 9px 13px;
  border-bottom: 3px solid transparent;
  font-size: 15px;
  font-weight: 700;
}

.main-nav a:not(.button):hover,
.main-nav a[aria-current="page"] {
  border-color: var(--coral);
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  margin-left: auto;
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--ink);
  background: var(--white);
  font-size: 24px;
  cursor: pointer;
}

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

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

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

.button.small {
  min-height: 40px;
  padding: 7px 15px;
  box-shadow: 3px 3px 0 var(--ink);
  font-size: 14px;
}

.hero {
  position: relative;
  min-height: 650px;
  overflow: hidden;
  border-bottom: 2px solid var(--ink);
  background:
    linear-gradient(115deg, rgba(255, 255, 255, 0.97) 0 58%, rgba(48, 197, 210, 0.16) 58% 100%);
}

.hero::after {
  position: absolute;
  right: 7%;
  bottom: -90px;
  width: 320px;
  height: 320px;
  border: 28px solid var(--lemon);
  border-radius: 50%;
  content: "";
}

.hero-grid {
  position: relative;
  z-index: 1;
  display: grid;
  min-height: 650px;
  grid-template-columns: 1.05fr 0.95fr;
  align-items: center;
  gap: 72px;
  padding-block: 64px;
}

.eyebrow {
  display: inline-flex;
  margin-bottom: 18px;
  padding: 5px 10px;
  border: 1px solid var(--ink);
  border-radius: 4px;
  background: var(--lemon);
  font-size: 13px;
  font-weight: 900;
}

.hero h1,
.page-hero h1 {
  max-width: 780px;
  margin: 0;
  font-size: clamp(42px, 6.5vw, 78px);
  line-height: 1.08;
  letter-spacing: 0;
}

.hero h1 span {
  color: var(--coral);
}

.hero-lead {
  max-width: 620px;
  margin: 22px 0 26px;
  color: var(--ink-soft);
  font-size: 19px;
}

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

.micro-copy {
  display: flex;
  margin: 22px 0 0;
  flex-wrap: wrap;
  gap: 10px 20px;
  padding: 0;
  list-style: none;
  color: var(--ink-soft);
  font-size: 14px;
}

.micro-copy li::before {
  margin-right: 7px;
  color: var(--cyan);
  content: "◆";
}

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

.hero-visual::before,
.hero-visual::after {
  position: absolute;
  border: 2px solid var(--ink);
  content: "";
}

.hero-visual::before {
  inset: 38px 12px 18px 54px;
  transform: rotate(4deg);
  background: var(--lemon);
}

.hero-visual::after {
  inset: 12px 48px 46px 18px;
  transform: rotate(-4deg);
  background: var(--cyan);
}

.hero-phone {
  position: relative;
  z-index: 2;
  width: min(281px, 72vw);
  max-width: 400px;
  border: 8px solid var(--ink);
  border-radius: 24px;
  box-shadow: var(--shadow);
}

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

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

.data-item {
  min-height: 104px;
  padding: 20px 24px;
  border-right: 1px solid rgba(255, 255, 255, 0.2);
}

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

.data-item strong {
  display: block;
  color: var(--lemon);
  font-size: 25px;
}

.data-item span {
  color: #dfe5ee;
  font-size: 14px;
}

.section {
  padding-block: 88px;
}

.section.alt {
  border-block: 1px solid var(--line);
  background: var(--white);
}

.section-head {
  display: flex;
  margin-bottom: 36px;
  align-items: end;
  justify-content: space-between;
  gap: 20px;
}

.section-head h2 {
  margin: 0;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.15;
}

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

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

.feature-card,
.route-card,
.quote-card {
  border: 2px solid var(--ink);
  border-radius: var(--radius);
  background: var(--white);
  box-shadow: 6px 6px 0 rgba(23, 32, 51, 0.14);
}

.feature-card {
  padding: 28px;
}

.feature-card:nth-child(2) {
  background: #e9fbfc;
}

.feature-card:nth-child(3) {
  background: #fff5f7;
}

.feature-card:nth-child(4) {
  background: #fff9df;
}

.feature-index {
  display: inline-flex;
  width: 34px;
  height: 34px;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  color: var(--white);
  background: var(--ink);
  font-size: 13px;
  font-weight: 900;
}

.feature-card h3 {
  margin: 18px 0 8px;
  font-size: 21px;
}

.feature-card p {
  margin: 0;
  color: var(--ink-soft);
}

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

.preview-figure {
  margin: 0;
}

.app-preview {
  width: 100%;
  max-width: 400px;
  height: auto;
  border: 2px solid var(--ink);
  border-radius: 8px;
  box-shadow: 7px 7px 0 var(--cyan);
}

.preview-figure:nth-child(even) .app-preview {
  margin-top: 34px;
  box-shadow: 7px 7px 0 var(--coral);
}

.preview-figure figcaption {
  margin-top: 14px;
  font-size: 14px;
  font-weight: 800;
}

.routes-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.route-card {
  position: relative;
  min-height: 300px;
  padding: 34px;
  overflow: hidden;
}

.route-card::after {
  position: absolute;
  right: -40px;
  bottom: -55px;
  width: 180px;
  height: 180px;
  border: 20px solid var(--cyan);
  border-radius: 50%;
  content: "";
}

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

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

.route-card ul {
  position: relative;
  z-index: 1;
  margin: 0 0 24px;
  padding-left: 20px;
}

.route-card .text-link {
  position: relative;
  z-index: 1;
  border-bottom: 2px solid var(--coral);
  font-weight: 900;
}

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

.quote-card {
  margin: 0;
  padding: 26px;
}

.quote-card blockquote {
  margin: 0 0 16px;
  font-size: 17px;
}

.quote-card cite {
  color: var(--ink-soft);
  font-size: 14px;
  font-style: normal;
}

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

.faq-list details {
  border: 1px solid var(--line);
  border-left: 5px solid var(--cyan);
  border-radius: 6px;
  background: var(--white);
}

.faq-list details[open] {
  border-left-color: var(--coral);
}

.faq-list summary {
  padding: 18px 22px;
  font-weight: 900;
  cursor: pointer;
}

.faq-list details p,
.faq-list details ol,
.faq-list details ul {
  margin: 0;
  padding: 0 22px 20px 46px;
  color: var(--ink-soft);
}

.download-band {
  padding-block: 66px;
  border-block: 2px solid var(--ink);
  background: var(--lemon);
}

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

.download-band h2 {
  margin: 0 0 8px;
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.15;
}

.download-band p,
.download-note {
  display: block;
  margin: 0;
  color: #4b452c;
}

.site-footer {
  padding: 52px 0 28px;
  color: #d8deea;
  background: var(--ink);
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.35fr 1fr 1fr;
  gap: 50px;
}

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

.site-footer h2 {
  margin: 0 0 12px;
  color: var(--white);
  font-size: 16px;
}

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

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

.disclaimer {
  margin: 36px 0 0;
  padding-top: 22px;
  border-top: 1px solid rgba(255, 255, 255, 0.16);
  color: #aeb7c7;
  font-size: 13px;
}

.copyright {
  margin: 8px 0 0;
  color: #8e99aa;
  font-size: 13px;
}

.page-hero {
  padding: 82px 0 70px;
  border-bottom: 2px solid var(--ink);
  background: var(--white);
}

.page-hero .lead {
  max-width: 760px;
  margin: 22px 0 0;
  color: var(--ink-soft);
  font-size: 19px;
}

.page-hero .hero-actions {
  margin-top: 26px;
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 280px;
  align-items: start;
  gap: 54px;
}

.article-content section {
  margin-bottom: 70px;
  scroll-margin-top: 100px;
}

.article-content h2 {
  margin: 0 0 24px;
  font-size: 32px;
  line-height: 1.25;
}

.article-content h3 {
  margin: 28px 0 10px;
  font-size: 21px;
}

.article-content p {
  margin: 0 0 16px;
  color: #3f4858;
}

.article-content a:not(.button) {
  border-bottom: 2px solid var(--coral);
  font-weight: 800;
}

.article-aside {
  position: sticky;
  top: 96px;
  border: 2px solid var(--ink);
  border-radius: var(--radius);
  background: var(--white);
  box-shadow: 6px 6px 0 var(--cyan);
}

.article-aside h2 {
  margin: 0;
  padding: 18px 20px;
  border-bottom: 1px solid var(--line);
  font-size: 17px;
}

.article-aside nav {
  display: grid;
  padding: 12px;
}

.article-aside nav a {
  padding: 8px 10px;
  border-radius: 4px;
  color: var(--ink-soft);
  font-size: 14px;
}

.article-aside nav a:hover {
  color: var(--ink);
  background: #e9fbfc;
}

.step-list {
  display: grid;
  gap: 28px;
  counter-reset: steps;
}

.step-card {
  display: grid;
  padding: 28px;
  grid-template-columns: 58px minmax(0, 1fr);
  gap: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  counter-increment: steps;
}

.step-card::before {
  display: flex;
  width: 50px;
  height: 50px;
  align-items: center;
  justify-content: center;
  border: 2px solid var(--ink);
  border-radius: 50%;
  color: var(--white);
  background: var(--coral);
  font-weight: 900;
  content: counter(steps, decimal-leading-zero);
}

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

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

.guide-visual {
  display: grid;
  margin-top: 24px;
  grid-template-columns: 220px minmax(0, 1fr);
  align-items: center;
  gap: 28px;
  padding: 24px;
  border: 2px solid var(--ink);
  border-radius: var(--radius);
  background: #fff9df;
}

.guide-visual .app-preview {
  margin-inline: auto;
}

.check-list {
  display: grid;
  margin: 0;
  gap: 10px;
  padding: 0;
  list-style: none;
}

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

.check-list li::before {
  position: absolute;
  left: 0;
  color: var(--coral);
  font-weight: 900;
  content: "✓";
}

.info-box {
  margin: 24px 0;
  padding: 22px 24px;
  border-left: 6px solid var(--cyan);
  background: #e9fbfc;
}

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

.feature-detail-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.feature-detail {
  padding: 25px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
}

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

.feature-detail p:last-child {
  margin-bottom: 0;
}

.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--white);
}

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

th {
  background: var(--ink);
  color: var(--white);
}

.reveal {
  transform: translateY(16px);
  opacity: 0;
  transition: opacity 500ms ease, transform 500ms ease;
}

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

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

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

@media (max-width: 900px) {
  .nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .main-nav {
    position: absolute;
    top: 72px;
    right: 20px;
    left: 20px;
    display: none;
    padding: 14px;
    align-items: stretch;
    flex-direction: column;
    border: 2px solid var(--ink);
    border-radius: 8px;
    background: var(--white);
    box-shadow: var(--shadow);
  }

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

  .main-nav .button {
    margin-top: 6px;
  }

  .hero,
  .hero-grid {
    min-height: auto;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 34px;
    padding-block: 56px;
  }

  .hero-visual {
    min-height: 500px;
  }

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

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

  .data-item:nth-child(-n + 2) {
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  }

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

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

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

  .article-aside {
    position: static;
    order: -1;
  }

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

@media (max-width: 620px) {
  .container {
    width: min(calc(100% - 28px), var(--container));
  }

  .site-header .brand span {
    font-size: 20px;
  }

  .hero h1,
  .page-hero h1 {
    font-size: 42px;
  }

  .hero-lead,
  .page-hero .lead {
    font-size: 17px;
  }

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

  .hero-visual {
    min-height: 460px;
  }

  .data-grid,
  .feature-grid,
  .quotes-grid,
  .gallery-grid,
  .routes-grid,
  .feature-detail-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .data-item {
    border-right: 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
  }

  .preview-figure,
  .preview-figure:nth-child(even) .app-preview {
    margin-top: 0;
  }

  .section {
    padding-block: 62px;
  }

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

  .download-band .button {
    width: 100%;
  }

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

  .guide-visual {
    grid-template-columns: 1fr;
  }

  .article-content h2 {
    font-size: 28px;
  }
}