:root {
  --rose: #ef476f;
  --coral: #ff7a59;
  --cream: #fffaf6;
  --paper: #ffffff;
  --ink: #30272c;
  --muted: #6f6268;
  --line: #eadfe2;
  --teal: #2a9d8f;
  --teal-soft: #e2f3ef;
  --yellow: #ffd166;
  --shadow: 0 18px 45px rgba(63, 38, 47, 0.12);
  --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", system-ui, sans-serif;
  font-size: 16px;
  line-height: 1.75;
}

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;
}

.site-header {
  position: sticky;
  z-index: 50;
  top: 0;
  border-bottom: 1px solid rgba(234, 223, 226, 0.9);
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
}

.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: 11px;
  font-size: 20px;
  font-weight: 800;
}

.brand img {
  width: 44px;
  height: 44px;
  border-radius: 10px;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 30px;
}

.nav-links {
  display: flex;
  margin: 0;
  padding: 0;
  align-items: center;
  gap: 26px;
  list-style: none;
}

.nav-links a {
  color: var(--muted);
  font-size: 15px;
  font-weight: 700;
}

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

.menu-toggle {
  display: none;
  width: 44px;
  height: 44px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: 6px;
  background: var(--paper);
  cursor: pointer;
}

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

.button {
  display: inline-flex;
  min-height: 48px;
  padding: 0 22px;
  align-items: center;
  justify-content: center;
  gap: 9px;
  border: 1px solid transparent;
  border-radius: 6px;
  background: var(--rose);
  color: #fff;
  font-weight: 800;
  line-height: 1;
  box-shadow: 0 9px 22px rgba(239, 71, 111, 0.22);
  transition: transform 180ms ease, box-shadow 180ms ease, background 180ms ease;
}

.button:hover {
  transform: translateY(-2px);
  background: #d83d62;
  box-shadow: 0 12px 26px rgba(239, 71, 111, 0.28);
}

.button.secondary {
  border-color: var(--ink);
  background: transparent;
  color: var(--ink);
  box-shadow: none;
}

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

.button.small {
  min-height: 42px;
  padding-inline: 18px;
  font-size: 14px;
}

.hero {
  overflow: hidden;
  border-bottom: 1px solid var(--line);
  background-color: var(--cream);
  background-image: radial-gradient(#e9cdd4 1px, transparent 1px);
  background-size: 18px 18px;
}

.hero-grid {
  display: grid;
  min-height: 650px;
  padding-block: 64px 58px;
  align-items: center;
  grid-template-columns: minmax(0, 1.05fr) minmax(340px, 0.95fr);
  gap: 64px;
}

.eyebrow {
  display: inline-block;
  margin-bottom: 14px;
  color: var(--teal);
  font-size: 13px;
  font-weight: 900;
}

h1,
h2,
h3 {
  margin-top: 0;
  line-height: 1.25;
  letter-spacing: 0;
}

h1 {
  max-width: 700px;
  margin-bottom: 20px;
  font-size: clamp(42px, 5.2vw, 72px);
  font-weight: 900;
}

.hero-copy > p {
  max-width: 650px;
  margin: 0 0 26px;
  color: var(--muted);
  font-size: 18px;
}

.tag-list {
  display: flex;
  margin: 0 0 30px;
  padding: 0;
  flex-wrap: wrap;
  gap: 10px;
  list-style: none;
}

.tag-list li {
  padding: 5px 11px;
  border: 1px solid #e6c8d0;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.76);
  color: #6a4b55;
  font-size: 13px;
  font-weight: 700;
}

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

.hero-visual {
  position: relative;
  display: flex;
  min-height: 530px;
  align-items: center;
  justify-content: center;
}

.hero-visual::before {
  position: absolute;
  width: 76%;
  height: 74%;
  border: 2px solid var(--ink);
  background: var(--yellow);
  content: "";
  transform: rotate(4deg);
}

.hero-screen {
  position: relative;
  z-index: 1;
  width: min(300px, 72vw);
  max-width: 400px;
  height: auto;
  border: 8px solid var(--ink);
  border-radius: 28px;
  box-shadow: var(--shadow);
  transform: rotate(-2deg);
}

.hero-note {
  position: absolute;
  z-index: 2;
  right: 0;
  bottom: 60px;
  padding: 12px 16px;
  border: 2px solid var(--ink);
  border-radius: 4px;
  background: var(--paper);
  font-size: 14px;
  font-weight: 800;
  box-shadow: 7px 7px 0 var(--teal);
}

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

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

.signal-item {
  min-height: 110px;
  padding: 24px 26px;
  border-right: 1px solid var(--line);
}

.signal-item:first-child {
  border-left: 1px solid var(--line);
}

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

.signal-item strong {
  margin-bottom: 3px;
  font-size: 19px;
}

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

.section {
  padding-block: 88px;
}

.section.alt {
  background: #f4f9f8;
}

.section-heading {
  display: flex;
  margin-bottom: 36px;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
}

.section-heading .eyebrow {
  margin-bottom: 6px;
}

.section-heading h2 {
  max-width: 680px;
  margin-bottom: 0;
  font-size: clamp(30px, 3.2vw, 44px);
}

.section-heading a {
  flex: 0 0 auto;
  color: var(--rose);
  font-weight: 800;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.feature-card {
  min-height: 260px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
}

.feature-card:nth-child(2) {
  border-top: 4px solid var(--teal);
}

.feature-card:nth-child(3) {
  border-top: 4px solid var(--yellow);
}

.feature-card:nth-child(4) {
  border-top: 4px solid var(--coral);
}

.feature-index {
  display: inline-grid;
  width: 40px;
  height: 40px;
  margin-bottom: 40px;
  place-items: center;
  border: 2px solid var(--ink);
  border-radius: 50%;
  color: var(--rose);
  font-weight: 900;
}

.feature-card h3 {
  margin-bottom: 10px;
  font-size: 20px;
}

.feature-card p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

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

.screenshot {
  margin: 0;
}

.screenshot img {
  width: 100%;
  max-width: 400px;
  height: auto;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 12px 30px rgba(45, 69, 66, 0.1);
}

.screenshot figcaption {
  padding-top: 14px;
  font-size: 14px;
  font-weight: 800;
}

.path-band {
  border-block: 1px solid var(--ink);
  background: var(--ink);
  color: #fff;
}

.path-grid {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 80px;
}

.path-intro h2 {
  margin-bottom: 22px;
  font-size: clamp(30px, 3.3vw, 46px);
}

.path-intro p {
  color: #d7ccd0;
}

.path-list {
  display: grid;
  gap: 0;
}

.path-link {
  display: grid;
  padding: 24px 4px;
  border-bottom: 1px solid #594c52;
  align-items: center;
  grid-template-columns: 56px 1fr auto;
  gap: 18px;
}

.path-link:first-child {
  border-top: 1px solid #594c52;
}

.path-link b {
  color: var(--yellow);
}

.path-link span {
  color: #d7ccd0;
  font-size: 14px;
}

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

.review {
  margin: 0;
  padding: 26px;
  border-left: 4px solid var(--rose);
  background: var(--cream);
}

.review blockquote {
  margin: 0 0 18px;
}

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

.quick-faq {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  border: 1px solid var(--line);
  background: var(--line);
}

.quick-faq article {
  padding: 26px;
  background: var(--paper);
}

.quick-faq h3 {
  margin-bottom: 10px;
  font-size: 18px;
}

.quick-faq p {
  margin: 0;
  color: var(--muted);
  font-size: 15px;
}

.page-hero {
  padding-block: 78px 68px;
  border-bottom: 1px solid var(--line);
  background: var(--cream);
}

.page-hero .eyebrow {
  margin-bottom: 12px;
}

.page-hero h1 {
  max-width: 880px;
  margin-bottom: 18px;
  font-size: clamp(38px, 5vw, 62px);
}

.page-hero p {
  max-width: 800px;
  margin: 0;
  color: var(--muted);
  font-size: 18px;
}

.article-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 290px;
  gap: 70px;
}

.prose h2 {
  margin: 58px 0 22px;
  font-size: 30px;
}

.prose h2:first-child {
  margin-top: 0;
}

.prose h3 {
  margin: 0 0 8px;
  font-size: 20px;
}

.prose p {
  margin: 0 0 18px;
  color: #574b50;
}

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

.step-list li {
  position: relative;
  min-height: 132px;
  padding: 24px 24px 24px 84px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
  counter-increment: guide-step;
}

.step-list li::before {
  position: absolute;
  top: 24px;
  left: 24px;
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border-radius: 50%;
  background: var(--rose);
  color: #fff;
  content: counter(guide-step, decimal-leading-zero);
  font-weight: 900;
}

.check-list {
  margin: 0 0 28px;
  padding: 0;
  list-style: none;
}

.check-list li {
  position: relative;
  padding: 11px 0 11px 30px;
  border-bottom: 1px solid var(--line);
}

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

.note-box {
  margin: 28px 0;
  padding: 22px 24px;
  border-left: 5px solid var(--yellow);
  background: #fff8df;
}

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

.side-nav {
  position: sticky;
  top: 100px;
  align-self: start;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--paper);
}

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

.side-nav a {
  display: block;
  padding: 8px 0;
  color: var(--muted);
  font-size: 14px;
}

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

.side-nav .button {
  margin-top: 16px;
  color: #fff;
}

.feature-detail-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
}

.feature-detail {
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.feature-detail h3 {
  color: var(--rose);
}

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

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

.faq-question {
  display: grid;
  width: 100%;
  padding: 20px 4px;
  border: 0;
  background: transparent;
  color: var(--ink);
  cursor: pointer;
  font: inherit;
  font-weight: 800;
  text-align: left;
  grid-template-columns: 1fr 32px;
  gap: 16px;
}

.faq-question::after {
  color: var(--rose);
  content: "+";
  font-size: 24px;
  text-align: center;
}

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

.faq-answer {
  padding: 0 46px 20px 4px;
  color: var(--muted);
}

.faq-answer[hidden] {
  display: none;
}

.bottom-cta {
  padding-block: 66px;
  border-block: 1px solid var(--ink);
  background: var(--yellow);
}

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

.cta-wrap h2 {
  margin-bottom: 8px;
  font-size: clamp(28px, 3vw, 42px);
}

.cta-wrap p {
  margin: 0;
  color: #594725;
}

.site-footer {
  padding-block: 46px 28px;
  background: var(--ink);
  color: #fff;
}

.footer-grid {
  display: grid;
  margin-bottom: 34px;
  grid-template-columns: 1fr auto;
  gap: 40px;
}

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

.footer-copy {
  max-width: 670px;
  margin: 0;
  color: #cbbec4;
  font-size: 14px;
}

.footer-links {
  display: flex;
  align-items: start;
  gap: 24px;
  color: #e8dde1;
  font-size: 14px;
}

.disclaimer {
  padding-top: 24px;
  border-top: 1px solid #594c52;
  color: #b8aab0;
  font-size: 13px;
}

.copyright {
  margin: 10px 0 0;
  color: #918188;
  font-size: 13px;
}

[data-reveal] {
  opacity: 1;
  transform: none;
  transition: transform 180ms ease;
}

[data-reveal].visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 980px) {
  .main-nav {
    position: absolute;
    top: 72px;
    right: 0;
    left: 0;
    display: none;
    padding: 22px 20px 28px;
    border-bottom: 1px solid var(--line);
    background: var(--paper);
    box-shadow: var(--shadow);
  }

  .main-nav.open {
    display: block;
  }

  .nav-links {
    margin-bottom: 18px;
    align-items: stretch;
    flex-direction: column;
    gap: 0;
  }

  .nav-links a {
    display: block;
    padding: 11px 0;
  }

  .main-nav .button {
    width: 100%;
  }

  .menu-toggle {
    display: block;
  }

  .hero-grid {
    min-height: auto;
    grid-template-columns: 1fr 0.8fr;
    gap: 28px;
  }

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

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

  .path-grid,
  .article-layout {
    grid-template-columns: 1fr;
    gap: 42px;
  }

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

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

  .brand {
    font-size: 18px;
  }

  .brand img {
    width: 40px;
    height: 40px;
  }

  .hero-grid {
    padding-block: 48px 44px;
    grid-template-columns: 1fr;
  }

  h1 {
    font-size: 43px;
  }

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

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

  .hero-note {
    right: 4px;
    bottom: 30px;
  }

  .signal-grid,
  .feature-grid,
  .screenshot-grid,
  .review-grid,
  .quick-faq,
  .feature-detail-grid {
    grid-template-columns: 1fr;
  }

  .signal-item,
  .signal-item:first-child {
    border-right: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    border-left: 1px solid var(--line);
  }

  .section {
    padding-block: 64px;
  }

  .section-heading,
  .cta-wrap,
  .footer-grid {
    align-items: flex-start;
    flex-direction: column;
  }

  .section-heading {
    display: block;
  }

  .section-heading a {
    display: inline-block;
    margin-top: 16px;
  }

  .path-grid {
    gap: 34px;
  }

  .path-link {
    grid-template-columns: 38px 1fr;
  }

  .path-link span:last-child {
    display: none;
  }

  .page-hero {
    padding-block: 58px 52px;
  }

  .article-layout {
    gap: 34px;
  }

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

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

  .cta-wrap {
    display: flex;
  }

  .cta-wrap .button {
    width: 100%;
  }

  .footer-grid {
    display: flex;
  }

  .footer-links {
    flex-wrap: wrap;
  }
}

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

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

  [data-reveal] {
    opacity: 1;
    transform: none;
  }
}