:root {
  --ink: #16323c;
  --deep: #123b4a;
  --teal: #167d76;
  --mint: #39b9ae;
  --sun: #f4c95d;
  --coral: #ee6b5a;
  --paper: #f8faf7;
  --white: #ffffff;
  --line: #d9e5e2;
  --muted: #60757a;
  --shadow: 0 18px 50px rgba(18, 59, 74, 0.12);
  --content: 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::before {
  position: fixed;
  inset: 0;
  z-index: -1;
  content: "";
  background-image: linear-gradient(rgba(22, 125, 118, 0.045) 1px, transparent 1px), linear-gradient(90deg, rgba(22, 125, 118, 0.045) 1px, transparent 1px);
  background-size: 36px 36px;
}

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

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

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  min-height: 72px;
  color: var(--white);
  background: rgba(18, 59, 74, 0.97);
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
}

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

.brand {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
  gap: 12px;
  font-size: 20px;
  font-weight: 800;
}

.brand img {
  width: 42px;
  height: 42px;
  border-radius: 6px;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.nav-links a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: #dfeceb;
  font-weight: 600;
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--sun);
}

.nav-download,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 132px;
  min-height: 48px;
  padding: 0 22px;
  color: var(--deep);
  background: var(--sun);
  border: 2px solid var(--sun);
  border-radius: 6px;
  font-weight: 800;
  box-shadow: 5px 5px 0 rgba(0, 0, 0, 0.18);
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.nav-download {
  min-width: 112px;
  min-height: 40px;
  padding-inline: 18px;
}

.button:hover,
.nav-download:hover {
  transform: translate(-2px, -2px);
  box-shadow: 7px 7px 0 rgba(0, 0, 0, 0.18);
}

.button-secondary {
  color: var(--white);
  background: transparent;
  border-color: rgba(255, 255, 255, 0.5);
  box-shadow: none;
}

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 10px;
  background: transparent;
  border: 1px solid rgba(255, 255, 255, 0.28);
  border-radius: 6px;
}

.menu-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  margin: 4px auto;
  background: var(--white);
}

.hero {
  position: relative;
  min-height: 680px;
  overflow: hidden;
  color: var(--white);
  background: var(--deep);
}

.hero::before,
.hero::after {
  position: absolute;
  height: 12px;
  content: "";
  transform: skewX(-28deg);
}

.hero::before {
  top: 108px;
  right: -4%;
  width: 48%;
  background: var(--mint);
}

.hero::after {
  right: 8%;
  bottom: 72px;
  width: 32%;
  background: var(--coral);
}

.hero-inner {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(420px, 0.9fr);
  align-items: center;
  min-height: 680px;
  gap: 54px;
}

.hero-copy {
  max-width: 620px;
  padding-block: 90px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  min-height: 34px;
  padding: 3px 12px;
  color: var(--deep);
  background: var(--mint);
  border-left: 6px solid var(--sun);
  font-size: 14px;
  font-weight: 800;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  max-width: 720px;
  margin: 24px 0 20px;
  overflow-wrap: anywhere;
  font-size: clamp(42px, 6vw, 68px);
  line-height: 1.08;
  letter-spacing: 0;
}

.hero-lead {
  max-width: 590px;
  margin-bottom: 28px;
  color: #d7e7e5;
  font-size: 18px;
}

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

.app-facts {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
  margin: 28px 0 0;
  padding: 0;
  color: #bcd3d0;
  list-style: none;
  font-size: 14px;
}

.app-facts li::before {
  margin-right: 8px;
  color: var(--sun);
  content: "◆";
}

.hero-visual {
  position: relative;
  align-self: center;
  min-height: 560px;
}

.hero-shot {
  position: absolute;
  top: 50%;
  bottom: auto;
  left: 62%;
  width: min(240px, 48vw);
  max-width: 400px;
  height: auto;
  object-fit: contain;
  border: 10px solid #081f28;
  border-radius: 24px;
  box-shadow: 18px 20px 0 var(--mint), var(--shadow);
  transform: translate(-50%, -50%) rotate(2deg);
}

.hero-shot.secondary {
  top: 50%;
  bottom: auto;
  left: 30%;
  width: min(190px, 38vw);
  z-index: -1;
  box-shadow: -14px 16px 0 var(--coral), var(--shadow);
  transform: translate(-50%, -50%) rotate(-6deg);
}

.wind-label {
  position: absolute;
  top: 120px;
  right: 0;
  color: var(--sun);
  font-size: 13px;
  font-weight: 800;
  writing-mode: vertical-rl;
}

.stat-strip {
  position: relative;
  z-index: 4;
  margin-top: -1px;
  background: var(--white);
  border-bottom: 1px solid var(--line);
}

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

.stat-item {
  min-height: 112px;
  padding: 24px 22px;
  border-left: 1px solid var(--line);
}

.stat-item:last-child {
  border-right: 1px solid var(--line);
}

.stat-item strong {
  display: block;
  color: var(--teal);
  font-size: 22px;
}

.stat-item span {
  color: var(--muted);
  font-size: 14px;
}

.section {
  padding: 88px 0;
}

.section-dark {
  color: var(--white);
  background: var(--deep);
}

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

.section-heading {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 38px;
}

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

.section-heading .index {
  color: var(--coral);
  font-size: 14px;
  font-weight: 800;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 18px;
}

.feature-card {
  grid-column: span 4;
  min-height: 240px;
  padding: 28px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 6px;
  box-shadow: 8px 8px 0 #d8ebe8;
}

.feature-card.wide {
  grid-column: span 8;
}

.feature-card.accent {
  color: var(--white);
  background: var(--teal);
  border-color: var(--teal);
  box-shadow: 8px 8px 0 var(--sun);
}

.feature-number {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  margin-bottom: 28px;
  color: var(--deep);
  background: var(--sun);
  border-radius: 50%;
  font-weight: 900;
}

.feature-card h3 {
  margin-bottom: 10px;
  font-size: 22px;
}

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

.feature-card.accent p {
  color: #d8efec;
}

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

.app-shot {
  margin: 0;
}

.shot-frame {
  padding: 10px;
  overflow: hidden;
  background: #071f28;
  border-radius: 24px;
  box-shadow: 9px 10px 0 rgba(57, 185, 174, 0.38);
}

.app-shot:nth-child(2n) .shot-frame {
  box-shadow: 9px 10px 0 rgba(244, 201, 93, 0.46);
}

.app-shot img {
  width: 100%;
  max-width: 300px;
  height: auto;
  margin-inline: auto;
  border-radius: 15px;
}

.app-shot figcaption {
  padding: 18px 4px 0;
  color: #cfe1df;
  font-size: 14px;
}

.app-shot strong {
  display: block;
  margin-bottom: 3px;
  color: var(--white);
  font-size: 17px;
}

.flow-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  counter-reset: flow;
}

.flow-item {
  position: relative;
  min-height: 220px;
  padding: 28px 28px 28px 64px;
  background: var(--white);
  border-top: 5px solid var(--teal);
  border-right: 1px solid var(--line);
  counter-increment: flow;
}

.flow-item::before {
  position: absolute;
  top: 30px;
  left: 22px;
  color: var(--coral);
  content: "0" counter(flow);
  font-weight: 900;
}

.flow-item:nth-child(2) {
  border-top-color: var(--sun);
}

.flow-item:nth-child(3) {
  border-top-color: var(--coral);
}

.flow-item h3 {
  font-size: 20px;
}

.deep-links {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 22px;
}

.deep-link {
  position: relative;
  min-height: 300px;
  padding: 38px;
  overflow: hidden;
  color: var(--white);
  background: var(--teal);
  border-radius: 6px;
}

.deep-link:nth-child(2) {
  color: var(--deep);
  background: var(--sun);
}

.deep-link h3 {
  max-width: 450px;
  margin-bottom: 16px;
  font-size: 30px;
  line-height: 1.25;
}

.deep-link p {
  max-width: 520px;
}

.ranking-intro {
  margin-bottom: 26px;
  color: var(--muted);
}

.ranking-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 22px;
}

.ranking-list {
  padding: 24px 28px;
  background: var(--white);
  border: 1px solid var(--line);
  border-top: 5px solid var(--teal);
  border-radius: 6px;
}

.ranking-list:nth-child(2) {
  border-top-color: var(--sun);
}

.ranking-list h3 {
  margin: 0 0 12px;
  color: var(--deep);
  font-size: 22px;
}

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

.ranking-list li {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 14px 0;
  border-top: 1px solid var(--line);
}

.ranking-list li span {
  color: var(--teal);
  font-weight: 900;
}

.ranking-list li strong {
  min-width: 0;
  overflow-wrap: anywhere;
}

.text-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  margin-top: 12px;
  font-weight: 900;
  border-bottom: 3px solid currentColor;
}

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

.review-card {
  margin: 0;
  padding: 28px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 6px;
}

.review-card blockquote {
  margin: 0 0 20px;
  font-size: 17px;
}

.review-card cite {
  color: var(--teal);
  font-size: 14px;
  font-style: normal;
  font-weight: 800;
}

.review-card time {
  display: block;
  margin-top: 5px;
  color: var(--muted);
  font-size: 13px;
}

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

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

.faq-list summary {
  position: relative;
  padding: 20px 56px 20px 22px;
  cursor: pointer;
  font-weight: 800;
  list-style: none;
}

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

.faq-list summary::after {
  position: absolute;
  top: 16px;
  right: 18px;
  color: var(--coral);
  content: "+";
  font-size: 26px;
}

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

.faq-list details p,
.faq-list details ul {
  margin: 0;
  padding: 0 22px 22px;
  color: var(--muted);
}

.faq-list details ul {
  padding-left: 42px;
}

.download-band {
  position: relative;
  overflow: hidden;
  color: var(--white);
  background: var(--deep);
}

.download-band::after {
  position: absolute;
  top: 50%;
  right: -8%;
  width: 38%;
  height: 18px;
  content: "";
  background: var(--coral);
  transform: skewX(-30deg);
}

.download-inner {
  position: relative;
  z-index: 2;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 230px;
  gap: 30px;
}

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

.download-inner p {
  margin: 0;
  color: #cfe1df;
}

.page-hero {
  position: relative;
  padding: 84px 0 72px;
  overflow: hidden;
  color: var(--white);
  background: var(--deep);
}

.page-hero::after {
  position: absolute;
  right: -6%;
  bottom: 36px;
  width: 42%;
  height: 14px;
  content: "";
  background: var(--mint);
  transform: skewX(-28deg);
}

.page-hero h1 {
  margin-bottom: 18px;
  font-size: clamp(40px, 5vw, 60px);
  word-break: break-all;
}

.page-hero p {
  max-width: 720px;
  margin-bottom: 0;
  color: #d4e4e2;
  font-size: 18px;
}

.breadcrumbs {
  margin-bottom: 18px;
  color: var(--sun);
  font-size: 14px;
}

.content-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 300px;
  align-items: start;
  gap: 42px;
}

.article-section {
  margin-bottom: 58px;
}

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

.article-section h3 {
  margin-top: 28px;
  font-size: 22px;
}

.step-list {
  display: grid;
  gap: 16px;
  margin: 0;
  padding: 0;
  list-style: none;
  counter-reset: guide;
}

.step-list li {
  position: relative;
  min-height: 130px;
  padding: 24px 26px 24px 88px;
  background: var(--white);
  border: 1px solid var(--line);
  border-left: 6px solid var(--teal);
  border-radius: 6px;
  counter-increment: guide;
}

.step-list li::before {
  position: absolute;
  top: 26px;
  left: 24px;
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  color: var(--deep);
  background: var(--sun);
  border-radius: 50%;
  content: counter(guide);
  font-weight: 900;
}

.step-list strong {
  display: block;
  margin-bottom: 6px;
  font-size: 19px;
}

.note-box {
  padding: 24px;
  background: #e4f4f1;
  border: 1px solid #acd8d2;
  border-radius: 6px;
}

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

.inline-shot {
  width: min(100%, 340px);
  max-width: 400px;
  margin: 28px auto;
  padding: 9px;
  background: #071f28;
  border-radius: 22px;
  box-shadow: 10px 12px 0 #cfe9e5;
}

.inline-shot img {
  width: 100%;
  max-width: 400px;
  height: auto;
  border-radius: 14px;
}

.sidebar {
  position: sticky;
  top: 96px;
  padding: 24px;
  background: var(--white);
  border-top: 6px solid var(--coral);
  box-shadow: var(--shadow);
}

.sidebar h2 {
  margin-bottom: 14px;
  font-size: 21px;
}

.sidebar ul {
  margin: 0 0 22px;
  padding: 0;
  list-style: none;
}

.sidebar li + li {
  border-top: 1px solid var(--line);
}

.sidebar a:not(.button) {
  display: block;
  padding: 11px 0;
  color: var(--teal);
  font-weight: 700;
}

.sidebar .button {
  width: 100%;
}

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

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

.info-table th,
.info-table td {
  padding: 15px 18px;
  text-align: left;
  border: 1px solid var(--line);
}

.info-table th {
  width: 28%;
  color: var(--deep);
  background: #e9f4f2;
}

.site-footer {
  padding: 56px 0 28px;
  color: #bfd2d0;
  background: #092832;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 0.6fr 0.8fr;
  gap: 42px;
  margin-bottom: 36px;
}

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

.site-footer h2 {
  margin-bottom: 14px;
  color: var(--white);
  font-size: 17px;
}

.site-footer ul {
  margin: 0;
  padding: 0;
  list-style: none;
}
.footer-grid li,
.footer-grid li a {
  font-size: 14px;
  font-weight: 600;
  line-height: 1.75;
}

.site-footer a {
  display: inline-block;
  padding-block: 4px;
}

.site-footer a:hover {
  color: var(--sun);
}

.disclaimer {
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.13);
  font-size: 13px;
}

.copyright {
  margin: 12px 0 0;
  font-size: 13px;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity 500ms ease, transform 500ms ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: none;
}

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

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

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

  .nav-links {
    position: absolute;
    top: 72px;
    right: 0;
    left: 0;
    display: none;
    padding: 14px 20px 22px;
    background: var(--deep);
    border-top: 1px solid rgba(255, 255, 255, 0.12);
  }

  .nav-links.is-open {
    display: grid;
    gap: 4px;
  }

  .nav-links a,
  .nav-download {
    width: 100%;
  }

  .hero-inner {
    grid-template-columns: 1fr 360px;
    gap: 14px;
  }

  .feature-card,
  .feature-card.wide {
    grid-column: span 6;
  }

  .screens-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

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

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

  .sidebar {
    position: static;
  }
}

@media (max-width: 720px) {
  .container {
    width: min(calc(100% - 28px), var(--content));
  }

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

  .nav-links {
    top: 64px;
  }

  .hero {
    min-height: 760px;
  }

  .hero-inner {
    display: block;
    min-height: 760px;
  }

  .hero-copy {
    position: relative;
    z-index: 3;
    padding: 64px 0 0;
  }

  h1 {
    font-size: 42px;
  }

  .hero-lead {
    max-width: 100%;
    font-size: 16px;
  }

  .hero-visual {
    position: absolute;
    right: 0;
    bottom: 0;
    left: 0;
    min-height: 360px;
    opacity: 0.38;
  }

  .hero-shot {
    top: auto;
    bottom: -210px;
    left: 74%;
    width: 220px;
    transform: translateX(-50%) rotate(2deg);
  }

  .hero-shot.secondary {
    top: auto;
    bottom: -150px;
    left: 28%;
    width: 180px;
    transform: translateX(-50%) rotate(-6deg);
  }

  .wind-label {
    display: none;
  }

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

  .stat-item {
    min-height: 100px;
    padding: 18px;
    border-bottom: 1px solid var(--line);
  }

  .section {
    padding: 64px 0;
  }

  .section-heading {
    align-items: start;
    flex-direction: column;
    margin-bottom: 28px;
  }

  .feature-card,
  .feature-card.wide {
    grid-column: 1 / -1;
    min-height: auto;
  }

  .deep-links,
  .ranking-grid,
  .review-grid,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .download-inner {
    align-items: flex-start;
    flex-direction: column;
    justify-content: center;
    min-height: 280px;
  }

  .download-band::after {
    right: -24%;
    bottom: 36px;
    top: auto;
    width: 74%;
  }

  .page-hero {
    padding: 62px 0 56px;
  }

  .page-hero h1 {
    font-size: 30px;
  }

  .step-list li {
    padding: 76px 20px 22px;
  }

  .step-list li::before {
    top: 20px;
    left: 20px;
  }
}

@media (max-width: 480px) {
  .brand {
    gap: 9px;
    font-size: 18px;
  }

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

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

  .app-facts {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
  }

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

  .app-shot {
    max-width: 310px;
    margin-inline: auto;
  }

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

  .deep-link {
    min-height: 260px;
    padding: 28px;
  }

  .deep-link h3 {
    font-size: 26px;
  }

  .info-table th,
  .info-table td {
    padding: 12px;
  }
}