:root {
  --ink: #191827;
  --muted: #686779;
  --paper: #fffdfb;
  --soft: #f4f1ff;
  --line: #dedbe9;
  --violet: #7467f0;
  --violet-dark: #5146c8;
  --night: #171528;
  --coral: #ff6b72;
  --sun: #ffd56a;
  --mint: #c7f0dc;
  --shadow: 0 18px 50px rgba(34, 29, 70, 0.12);
  --content: 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;
  line-height: 1.75;
  letter-spacing: 0;
}

body.menu-open {
  overflow: hidden;
}

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

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

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

button {
  font: inherit;
}

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 1000;
  padding: 8px 12px;
  color: #fff;
  background: var(--night);
  transform: translateY(-160%);
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid rgba(222, 219, 233, 0.82);
  background: rgba(255, 253, 251, 0.94);
  backdrop-filter: blur(14px);
}

.nav-wrap {
  width: min(calc(100% - 40px), var(--content));
  min-height: 72px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  gap: 28px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  flex: 0 0 auto;
  font-size: 21px;
  font-weight: 800;
}

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

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

.site-nav a:not(.button) {
  padding: 9px 12px;
  color: #4f4d5f;
  font-size: 15px;
  font-weight: 650;
  border-radius: 6px;
}

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

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  margin-left: auto;
  padding: 0;
  color: var(--ink);
  background: transparent;
  border: 1px solid var(--line);
  border-radius: 6px;
  font-size: 24px;
  cursor: pointer;
}

.button {
  min-height: 46px;
  padding: 11px 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: #fff;
  background: var(--coral);
  border: 1px solid var(--coral);
  border-radius: 6px;
  font-weight: 800;
  box-shadow: 0 9px 24px rgba(255, 107, 114, 0.24);
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
}

.button:hover {
  color: #fff;
  background: #ed575f;
  transform: translateY(-2px);
  box-shadow: 0 13px 30px rgba(255, 107, 114, 0.3);
}

.button.secondary {
  color: var(--ink);
  background: transparent;
  border-color: rgba(25, 24, 39, 0.28);
  box-shadow: none;
}

.button.secondary:hover {
  color: var(--violet-dark);
  background: #fff;
  border-color: var(--violet);
}

.hero {
  min-height: auto;
  padding: 50px 0 26px;
  overflow: hidden;
  background:
    linear-gradient(90deg, rgba(116, 103, 240, 0.08) 1px, transparent 1px),
    linear-gradient(rgba(116, 103, 240, 0.08) 1px, transparent 1px),
    var(--soft);
  background-size: 42px 42px;
}

.hero-inner,
.section-inner,
.page-shell {
  width: min(calc(100% - 40px), var(--content));
  margin: 0 auto;
}

.hero-inner {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(410px, 0.82fr);
  align-items: center;
  gap: 70px;
}

.kicker {
  margin: 0 0 14px;
  color: var(--violet-dark);
  font-size: 14px;
  font-weight: 800;
  text-transform: uppercase;
}

.hero h1,
.page-hero h1 {
  margin: 0;
  max-width: 760px;
  font-size: clamp(40px, 6vw, 76px);
  line-height: 1.06;
  letter-spacing: 0;
}

.hero-copy {
  max-width: 650px;
  margin: 24px 0 0;
  color: #504e61;
  font-size: 18px;
}

.hero-actions {
  margin-top: 30px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero-facts {
  margin: 34px 0 0;
  padding: 0;
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  list-style: none;
  color: #4f4d5f;
  font-size: 14px;
  font-weight: 700;
}

.hero-facts li::before {
  content: "✓";
  margin-right: 7px;
  color: var(--violet);
}

.phone-stage {
  position: relative;
  min-height: 480px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.phone-stage::before {
  content: "";
  position: absolute;
  width: 320px;
  height: 320px;
  background: var(--sun);
  border-radius: 50%;
  opacity: 0.72;
}

.phone {
  position: absolute;
  width: min(255px, 68vw);
  padding: 9px;
  background: var(--night);
  border: 1px solid #413e59;
  border-radius: 34px;
  box-shadow: var(--shadow);
}

.phone img {
  width: 100%;
  max-width: 400px;
  height: auto;
  border-radius: 26px;
}

.phone.back {
  transform: translate(-105px, 26px) rotate(-8deg) scale(0.88);
  opacity: 0.84;
}

.phone.front {
  transform: translate(72px, -12px) rotate(5deg);
}

.section {
  padding: 88px 0;
}

.section.dark {
  color: #fff;
  background: var(--night);
}

.section.soft {
  background: var(--soft);
}

.section.accent {
  background: var(--sun);
}

.section-title {
  margin: 0 0 34px;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1.18;
  letter-spacing: 0;
}

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

.section-head .section-title {
  margin-bottom: 0;
}

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

.text-link:hover {
  text-decoration: underline;
}

.stat-strip {
  margin-top: -1px;
  color: #fff;
  background: var(--night);
}

.stat-grid {
  width: min(calc(100% - 40px), var(--content));
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
}

.stat {
  min-height: 128px;
  padding: 26px 22px;
  display: flex;
  flex-direction: column;
  justify-content: center;
  border-left: 1px solid #39364e;
}

.stat:last-child {
  border-right: 1px solid #39364e;
}

.stat strong {
  color: var(--sun);
  font-size: 26px;
}

.stat span {
  color: #c7c4d6;
  font-size: 14px;
}

.feature-flow {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}

.feature-item {
  min-height: 270px;
  padding: 30px 26px;
  border-right: 1px solid var(--line);
}

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

.feature-number {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  color: #fff;
  background: var(--violet);
  border-radius: 50%;
  font-weight: 900;
}

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

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

.feature-item:nth-child(4) .feature-number {
  color: var(--ink);
  background: var(--sun);
}

.feature-item h3 {
  margin: 24px 0 10px;
  font-size: 21px;
}

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

.gallery {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.shot {
  margin: 0;
}

.shot-button {
  width: 100%;
  padding: 0;
  overflow: hidden;
  background: #fff;
  border: 1px solid #302d45;
  border-radius: 8px;
  cursor: zoom-in;
  box-shadow: 0 16px 34px rgba(0, 0, 0, 0.2);
}

.shot-button img {
  width: 100%;
  max-width: 400px;
  height: auto;
  transition: transform 220ms ease;
}

.shot-button:hover img {
  transform: scale(1.025);
}

.shot figcaption {
  margin-top: 12px;
  color: #c7c4d6;
  font-size: 14px;
}

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

.route-card,
.review,
.info-card {
  padding: 28px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.route-card {
  min-height: 270px;
  display: flex;
  flex-direction: column;
}

.route-card:nth-child(2) {
  border-top: 5px solid var(--coral);
}

.route-card:nth-child(3) {
  border-top: 5px solid var(--violet);
}

.route-card:first-child {
  border-top: 5px solid var(--sun);
}

.route-card h3,
.info-card h2,
.info-card h3 {
  margin: 0 0 12px;
  font-size: 22px;
}

.route-card p,
.info-card p {
  margin: 0 0 18px;
  color: var(--muted);
}

.route-card .text-link {
  margin-top: auto;
}

.review {
  position: relative;
  margin: 0;
  min-height: 240px;
}

.review::before {
  content: "“";
  position: absolute;
  top: 2px;
  right: 18px;
  color: var(--soft);
  font-size: 90px;
  font-weight: 900;
  line-height: 1;
}

.review p {
  position: relative;
  margin: 0 0 22px;
  font-size: 17px;
}

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

.faq-list {
  border-top: 1px solid var(--line);
}

.faq-item {
  border-bottom: 1px solid var(--line);
}

.faq-question {
  width: 100%;
  min-height: 68px;
  padding: 18px 4px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  color: var(--ink);
  background: transparent;
  border: 0;
  text-align: left;
  font-weight: 800;
  cursor: pointer;
}

.faq-question span:last-child {
  flex: 0 0 auto;
  color: var(--violet);
  font-size: 24px;
}

.faq-answer {
  display: none;
  padding: 0 46px 22px 4px;
  color: var(--muted);
}

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

.faq-item.open .faq-question span:last-child {
  transform: rotate(45deg);
}

.download-band {
  padding: 64px 0;
  color: #fff;
  background: var(--violet-dark);
}

.download-inner {
  width: min(calc(100% - 40px), var(--content));
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
}

.download-band h2 {
  margin: 0 0 8px;
  font-size: clamp(28px, 4vw, 42px);
}

.download-band p {
  margin: 0;
  color: #dfdcff;
}

.site-footer {
  padding: 48px 0 28px;
  color: #b8b4ca;
  background: var(--night);
}

.footer-grid {
  width: min(calc(100% - 40px), var(--content));
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 48px;
}

.site-footer .brand {
  color: #fff;
}

.site-footer h2 {
  margin: 0 0 14px;
  color: #fff;
  font-size: 16px;
}

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

.footer-links a:hover {
  color: #fff;
}

.disclaimer {
  width: min(calc(100% - 40px), var(--content));
  margin: 36px auto 0;
  padding-top: 22px;
  border-top: 1px solid #39364e;
  font-size: 13px;
}

.copyright {
  margin-top: 8px;
}

.page-hero {
  padding: 78px 0 70px;
  background: var(--soft);
  border-bottom: 1px solid var(--line);
}

.page-hero .lead {
  max-width: 780px;
  margin: 22px 0 0;
  color: var(--muted);
  font-size: 18px;
}

.breadcrumb {
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 14px;
}

.breadcrumb a {
  color: var(--violet-dark);
}

.content-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  gap: 56px;
  align-items: start;
}

.article-block {
  padding: 36px 0;
  border-bottom: 1px solid var(--line);
}

.article-block:first-child {
  padding-top: 0;
}

.article-block h2 {
  margin: 0 0 18px;
  font-size: 28px;
  line-height: 1.3;
}

.article-block h3 {
  margin: 22px 0 8px;
  font-size: 19px;
}

.article-block p {
  margin: 0 0 14px;
  color: #4f4d5f;
}

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

.step {
  position: relative;
  padding: 0 0 34px 70px;
  counter-increment: steps;
}

.step::before {
  content: counter(steps);
  position: absolute;
  left: 0;
  top: 0;
  width: 44px;
  height: 44px;
  display: grid;
  place-items: center;
  color: #fff;
  background: var(--violet);
  border-radius: 50%;
  font-weight: 900;
}

.step::after {
  content: "";
  position: absolute;
  left: 21px;
  top: 50px;
  bottom: 6px;
  width: 2px;
  background: var(--line);
}

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

.step h3 {
  margin: 0 0 8px;
  font-size: 21px;
}

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

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

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

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

.side-nav {
  position: sticky;
  top: 96px;
  padding: 24px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
}

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

.side-nav a {
  display: block;
  padding: 8px 0;
  color: var(--muted);
  border-bottom: 1px solid #eceaf2;
}

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

.side-nav .button {
  margin-top: 18px;
  color: #fff;
  border-bottom: 1px solid var(--coral);
}

.feature-detail {
  display: grid;
  grid-template-columns: 120px minmax(0, 1fr);
  gap: 24px;
  padding: 30px 0;
  border-bottom: 1px solid var(--line);
}

.feature-icon {
  width: 92px;
  height: 92px;
  display: grid;
  place-items: center;
  color: var(--night);
  background: var(--sun);
  border-radius: 50%;
  font-size: 36px;
  font-weight: 900;
}

.feature-detail:nth-child(2n) .feature-icon {
  background: var(--mint);
}

.feature-detail h2 {
  margin: 0 0 10px;
  font-size: 25px;
}

.feature-detail p {
  margin: 0 0 10px;
  color: var(--muted);
}

.compact-faq .faq-question {
  font-size: 17px;
}

.lightbox {
  width: min(92vw, 480px);
  padding: 0;
  overflow: visible;
  background: transparent;
  border: 0;
}

.lightbox::backdrop {
  background: rgba(12, 11, 22, 0.86);
}

.lightbox img {
  width: 100%;
  max-width: 400px;
  height: auto;
  margin: 0 auto;
  border-radius: 8px;
}

.lightbox-close {
  position: absolute;
  top: -48px;
  right: 4px;
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  color: #fff;
  background: rgba(255, 255, 255, 0.12);
  border: 1px solid rgba(255, 255, 255, 0.4);
  border-radius: 50%;
  font-size: 26px;
  cursor: pointer;
}

@media (max-width: 900px) {
  .menu-toggle {
    display: grid;
    place-items: center;
  }

  .site-nav {
    position: fixed;
    inset: 72px 0 auto;
    padding: 18px 20px 24px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    background: var(--paper);
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow);
  }

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

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

  .hero {
    min-height: auto;
    padding-top: 36px;
  }

  .hero-inner {
    grid-template-columns: 1fr;
    gap: 20px;
  }

  .phone-stage {
    min-height: 400px;
  }

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

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

  .feature-item:nth-child(-n + 2) {
    border-bottom: 1px solid var(--line);
  }

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

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

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

@media (max-width: 620px) {
  .nav-wrap,
  .hero-inner,
  .section-inner,
  .page-shell,
  .stat-grid,
  .download-inner,
  .footer-grid,
  .disclaimer {
    width: min(calc(100% - 28px), var(--content));
  }

  .hero {
    padding: 28px 0 10px;
  }

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

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

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

  .phone-stage {
    min-height: 190px;
    overflow: hidden;
  }

  .phone-stage::before {
    width: 180px;
    height: 180px;
  }

  .phone {
    width: 145px;
    padding: 6px;
    border-radius: 24px;
  }

  .phone img {
    border-radius: 18px;
  }

  .phone.back {
    transform: translate(-34px, 14px) rotate(-7deg) scale(0.84);
  }

  .phone.front {
    transform: translate(34px, 0) rotate(5deg);
  }

  .hero-copy {
    margin-top: 16px;
  }

  .hero-actions {
    margin-top: 22px;
  }

  .hero-facts {
    margin-top: 20px;
  }

  .stat-grid,
  .feature-flow,
  .gallery {
    grid-template-columns: 1fr 1fr;
  }

  .stat {
    min-height: 104px;
    padding: 18px 14px;
  }

  .stat strong {
    font-size: 21px;
  }

  .feature-item {
    min-height: 240px;
    padding: 24px 18px;
  }

  .section {
    padding: 62px 0;
  }

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

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

  .page-hero {
    padding: 54px 0;
  }

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

  .feature-icon {
    width: 68px;
    height: 68px;
    font-size: 28px;
  }
}

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

  *,
  *::before,
  *::after {
    transition: none !important;
  }
}