:root {
  --ink: #102b26;
  --ink-soft: #33534d;
  --paper: #f7fbf8;
  --surface: #ffffff;
  --mint: #55d68b;
  --mint-dark: #168a56;
  --mint-pale: #dff6e7;
  --coral: #ff6b5f;
  --cream: #fff6db;
  --line: #cfe1d7;
  --shadow: 0 18px 48px rgba(16, 43, 38, 0.12);
  --font: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "微软雅黑", Arial, Helvetica, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  font-family: var(--font);
  line-height: 1.7;
  letter-spacing: 0;
}

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

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

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

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 99;
  padding: 8px 12px;
  color: #fff;
  background: var(--ink);
  transform: translateY(-150%);
}

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

.container {
  width: min(1140px, calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  border-bottom: 1px solid rgba(16, 43, 38, 0.1);
  background: rgba(247, 251, 248, 0.96);
}

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

.brand {
  display: inline-flex;
  flex: 0 0 auto;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  font-weight: 800;
}

.brand img {
  width: 42px;
  height: 42px;
  border-radius: 8px;
}

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

.site-nav a {
  padding: 10px 13px;
  border-radius: 6px;
  color: var(--ink-soft);
  font-size: 15px;
  font-weight: 700;
}

.site-nav a:hover,
.site-nav a[aria-current="page"] {
  color: var(--ink);
  background: var(--mint-pale);
}

.site-nav .nav-download {
  margin-left: 6px;
  color: #fff;
  background: var(--ink);
}

.site-nav .nav-download:hover {
  color: var(--ink);
  background: var(--mint);
}

.menu-button {
  display: none;
  width: 42px;
  height: 42px;
  padding: 9px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
  cursor: pointer;
}

.menu-button span {
  display: block;
  width: 100%;
  height: 2px;
  margin: 5px 0;
  background: var(--ink);
}

.hero {
  min-height: min(700px, calc(100svh - 112px));
  display: flex;
  align-items: center;
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background: var(--cream);
}

.hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(430px, 1.1fr);
  align-items: center;
  gap: 56px;
  padding-top: 44px;
  padding-bottom: 44px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin: 0 0 16px;
  color: var(--mint-dark);
  font-size: 14px;
  font-weight: 800;
}

.eyebrow::before {
  width: 28px;
  height: 3px;
  background: var(--coral);
  content: "";
}

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

h1,
h2,
h3 {
  line-height: 1.22;
}

h1 {
  margin-bottom: 20px;
  font-size: clamp(40px, 6vw, 76px);
  font-weight: 900;
}

.hero-copy > p:not(.eyebrow) {
  max-width: 600px;
  margin-bottom: 28px;
  color: var(--ink-soft);
  font-size: 18px;
}

.hero-actions,
.action-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
}

.button {
  display: inline-flex;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  padding: 11px 22px;
  border: 2px solid var(--ink);
  border-radius: 6px;
  font-weight: 800;
  transition: transform 160ms ease, background 160ms ease;
}

.button:hover {
  transform: translateY(-2px);
}

.button-primary {
  color: #fff;
  background: var(--ink);
}

.button-primary:hover {
  color: var(--ink);
  background: var(--mint);
}

.button-secondary {
  background: transparent;
}

.hero-note {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 18px;
  margin-top: 22px;
  color: var(--ink-soft);
  font-size: 14px;
}

.hero-note span::before {
  margin-right: 7px;
  color: var(--mint-dark);
  content: "✓";
  font-weight: 900;
}

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

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

.hero-visual::before {
  top: 4%;
  right: 6%;
  width: 90px;
  height: 56px;
  background: var(--coral);
  transform: rotate(7deg);
}

.hero-visual::after {
  bottom: 4%;
  left: 4%;
  width: 74px;
  height: 74px;
  border-radius: 50%;
  background: var(--mint);
}

.phone-shot {
  position: absolute;
  width: min(230px, 44%);
  max-width: 400px;
  height: auto;
  border: 8px solid var(--ink);
  border-radius: 22px;
  box-shadow: var(--shadow);
}

.phone-shot.center {
  z-index: 3;
  width: min(250px, 48%);
  transform: translateY(-2px);
}

.phone-shot.left {
  z-index: 2;
  left: 3%;
  transform: rotate(-7deg) translateY(20px);
}

.phone-shot.right {
  z-index: 1;
  right: 3%;
  transform: rotate(7deg) translateY(20px);
}

.signal-strip {
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}

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

.signal-item {
  padding: 22px 28px;
  border-right: 1px solid var(--line);
}

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

.signal-item strong,
.signal-item span {
  display: block;
}

.signal-item strong {
  font-size: 21px;
}

.signal-item span {
  color: var(--ink-soft);
  font-size: 14px;
}

.section {
  padding: 88px 0;
}

.section-alt {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: var(--surface);
}

.section h2 {
  margin-bottom: 36px;
  font-size: clamp(30px, 4vw, 46px);
}

.feature-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 16px;
}

.feature-card {
  min-height: 220px;
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.feature-card:nth-child(1) {
  background: var(--mint-pale);
}

.feature-card:nth-child(4) {
  background: var(--cream);
}

.feature-card h3 {
  margin-bottom: 12px;
  font-size: 24px;
}

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

.feature-tag {
  display: inline-block;
  margin-bottom: 24px;
  padding: 3px 9px;
  border: 1px solid currentColor;
  border-radius: 999px;
  color: var(--mint-dark);
  font-size: 12px;
  font-weight: 800;
}

.screenshot-grid {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 18px;
  align-items: end;
}

.screenshot-card {
  margin: 0;
}

.screenshot-card img {
  width: 100%;
  max-width: 400px;
  border: 5px solid var(--ink);
  border-radius: 18px;
  box-shadow: 0 12px 28px rgba(16, 43, 38, 0.12);
}

.screenshot-card figcaption {
  padding-top: 12px;
  color: var(--ink-soft);
  font-size: 14px;
  font-weight: 700;
}

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

.path-card {
  position: relative;
  min-height: 270px;
  padding: 34px;
  overflow: hidden;
  border: 2px solid var(--ink);
  border-radius: 8px;
  background: var(--mint);
}

.path-card:nth-child(2) {
  background: var(--coral);
}

.path-card .path-number {
  position: absolute;
  top: 8px;
  right: 20px;
  color: rgba(16, 43, 38, 0.2);
  font-size: 88px;
  font-weight: 900;
  line-height: 1;
}

.path-card h3 {
  position: relative;
  margin: 64px 0 14px;
  font-size: 30px;
}

.path-card p {
  position: relative;
  max-width: 430px;
}

.text-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border-bottom: 2px solid currentColor;
  font-weight: 800;
}

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

.review-card {
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.review-card blockquote {
  margin: 0 0 24px;
  font-size: 17px;
}

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

.faq-list {
  display: grid;
  gap: 10px;
}

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

.faq-list summary {
  position: relative;
  padding: 20px 52px 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: 18px;
  right: 20px;
  content: "+";
  font-size: 24px;
  line-height: 1;
}

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

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

.bottom-cta {
  padding: 68px 0;
  color: #fff;
  background: var(--ink);
}

.cta-wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
}

.bottom-cta h2 {
  margin-bottom: 8px;
  font-size: clamp(30px, 4vw, 48px);
}

.bottom-cta p,
.bottom-cta .cta-subcopy {
  display: block;
  margin-bottom: 0;
  color: #cbe0d8;
}

.bottom-cta .button-primary {
  flex: 0 0 auto;
  color: var(--ink);
  border-color: var(--mint);
  background: var(--mint);
}

.site-footer {
  padding: 44px 0 28px;
  border-top: 1px solid #31524b;
  color: #cbe0d8;
  background: #0a1f1b;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 32px;
  align-items: start;
}

.footer-brand {
  color: #fff;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 22px;
}

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

.disclaimer {
  margin: 30px 0 0;
  padding-top: 24px;
  border-top: 1px solid #31524b;
  font-size: 13px;
}

.copyright {
  margin: 10px 0 0;
  color: #88a79f;
  font-size: 13px;
}

.page-hero {
  padding: 78px 0 62px;
  border-bottom: 1px solid var(--line);
  background: var(--cream);
}

.page-hero h1 {
  max-width: 850px;
  font-size: clamp(38px, 6vw, 68px);
}

.page-hero p {
  max-width: 760px;
  margin-bottom: 0;
  color: var(--ink-soft);
  font-size: 18px;
}

.guide-layout {
  display: grid;
  grid-template-columns: 260px minmax(0, 1fr);
  gap: 52px;
  align-items: start;
}

.guide-aside {
  position: sticky;
  top: 98px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.guide-aside strong {
  display: block;
  margin-bottom: 12px;
}

.guide-aside a {
  display: block;
  padding: 8px 0;
  color: var(--ink-soft);
}

.guide-aside a:hover {
  color: var(--mint-dark);
}

.article-content section {
  margin-bottom: 64px;
  scroll-margin-top: 100px;
}

.article-content h2 {
  margin-bottom: 24px;
  font-size: 34px;
}

.article-content h3 {
  margin: 30px 0 12px;
  font-size: 22px;
}

.article-content p,
.article-content li {
  color: var(--ink-soft);
}

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

.step-list li {
  position: relative;
  min-height: 118px;
  padding: 0 0 34px 76px;
  counter-increment: steps;
}

.step-list li::before {
  position: absolute;
  top: 0;
  left: 0;
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: #fff;
  background: var(--ink);
  content: counter(steps, decimal-leading-zero);
  font-weight: 900;
}

.step-list li::after {
  position: absolute;
  top: 52px;
  bottom: 4px;
  left: 23px;
  width: 2px;
  background: var(--line);
  content: "";
}

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

.step-list strong {
  display: block;
  margin-bottom: 8px;
  color: var(--ink);
  font-size: 20px;
}

.note-box {
  padding: 24px;
  border-left: 5px solid var(--coral);
  background: var(--cream);
}

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

.note-box p:last-child {
  margin-bottom: 0;
}

.guide-visual {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(240px, 0.55fr);
  gap: 32px;
  align-items: center;
  margin: 34px 0;
  padding: 30px;
  border: 1px solid var(--line);
  background: var(--surface);
}

.guide-visual img {
  width: 100%;
  max-width: 300px;
  justify-self: center;
  border: 4px solid var(--ink);
  border-radius: 16px;
}

.feature-detail-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 18px;
  margin-bottom: 62px;
}

.feature-detail {
  padding: 28px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface);
}

.feature-detail:nth-child(3n + 1) {
  border-top: 5px solid var(--mint);
}

.feature-detail:nth-child(3n + 2) {
  border-top: 5px solid var(--coral);
}

.feature-detail:nth-child(3n + 3) {
  border-top: 5px solid #f2c94c;
}

.feature-detail h2 {
  margin-bottom: 16px;
  font-size: 26px;
}

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

.faq-heading {
  margin: 72px 0 28px;
}

.related-links {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.related-links a {
  padding: 10px 14px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--surface);
  font-weight: 700;
}

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

  .site-nav {
    position: absolute;
    top: 72px;
    right: 20px;
    left: 20px;
    display: none;
    padding: 12px;
    border: 1px solid var(--line);
    background: var(--surface);
    box-shadow: var(--shadow);
  }

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

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

  .hero-grid {
    grid-template-columns: minmax(0, 0.9fr) minmax(360px, 1.1fr);
    gap: 24px;
  }

  .hero-visual {
    min-height: 420px;
  }

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

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

  .guide-aside {
    position: static;
    display: flex;
    flex-wrap: wrap;
    gap: 4px 20px;
  }

  .guide-aside strong {
    width: 100%;
  }
}

@media (max-width: 720px) {
  .container {
    width: min(100% - 28px, 1140px);
  }

  .nav-wrap {
    min-height: 66px;
  }

  .site-nav {
    top: 66px;
    right: 14px;
    left: 14px;
  }

  .hero {
    min-height: 0;
  }

  .hero-grid {
    grid-template-columns: 1fr;
    gap: 12px;
    padding-top: 42px;
    padding-bottom: 22px;
  }

  h1 {
    font-size: 38px;
  }

  .hero-copy > p:not(.eyebrow),
  .page-hero p {
    font-size: 16px;
  }

  .hero-visual {
    min-height: 250px;
  }

  .phone-shot,
  .phone-shot.center {
    width: 124px;
  }

  .phone-shot.left {
    left: 4%;
  }

  .phone-shot.right {
    right: 4%;
  }

  .signal-grid,
  .feature-grid,
  .path-grid,
  .review-grid,
  .feature-detail-grid,
  .guide-visual,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .signal-item {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .signal-item:last-child {
    border-bottom: 0;
  }

  .section {
    padding: 64px 0;
  }

  .section h2 {
    font-size: 34px;
  }

  .screenshot-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 14px;
  }

  .screenshot-card:last-child {
    grid-column: 1 / -1;
    width: calc(50% - 7px);
  }

  .cta-wrap {
    align-items: flex-start;
    flex-direction: column;
  }

  .page-hero {
    padding: 58px 0 46px;
  }

  .page-hero h1 {
    font-size: 40px;
  }

  .guide-visual {
    padding: 22px;
  }
}

@media (max-width: 430px) {
  .brand {
    font-size: 18px;
  }

  .hero-actions .button {
    flex: 1 1 145px;
    width: auto;
  }

  .action-row .button {
    width: 100%;
  }

  .hero-visual::before,
  .hero-visual::after {
    display: none;
  }

  .phone-shot,
  .phone-shot.center {
    width: 112px;
  }

  .feature-card,
  .path-card,
  .review-card,
  .feature-detail {
    padding: 22px;
  }
}

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

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