:root {
  --ink: #192234;
  --muted: #667085;
  --paper: #fffaf3;
  --white: #ffffff;
  --pink: #ff4f7b;
  --pink-dark: #df2f60;
  --cyan: #36c6c7;
  --yellow: #ffd45c;
  --line: #e9e4dd;
  --shadow: 0 18px 46px rgba(25, 34, 52, 0.12);
  --radius: 8px;
  --max: 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;
  line-height: 1.72;
  overflow-x: clip;
}
body.menu-open { overflow: hidden; }
a { color: inherit; text-decoration: none; }
img { display: block; height: auto; }
button, a { -webkit-tap-highlight-color: transparent; }
.container { width: min(calc(100% - 40px), var(--max)); margin-inline: auto; }
.skip-link { position: fixed; left: 12px; top: -60px; z-index: 99; background: var(--ink); color: white; padding: 10px 14px; }
.skip-link:focus { top: 12px; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 250, 243, 0.96);
  border-bottom: 1px solid rgba(25, 34, 52, 0.1);
  backdrop-filter: blur(14px);
}
.nav-shell { min-height: 72px; display: flex; align-items: center; justify-content: space-between; gap: 28px; }
.brand { display: inline-flex; align-items: center; gap: 10px; font-size: 21px; font-weight: 900; }
.brand img { width: 42px; height: 42px; border-radius: 8px; }
.nav-links { display: flex; align-items: center; gap: 28px; font-weight: 700; }
.nav-links a:not(.download-btn) { padding: 22px 0 18px; border-bottom: 3px solid transparent; }
.nav-links a[aria-current="page"], .nav-links a:not(.download-btn):hover { color: var(--pink-dark); border-bottom-color: var(--pink); }
.menu-toggle { display: none; width: 42px; height: 42px; border: 1px solid var(--line); background: var(--white); color: var(--ink); border-radius: 6px; font-size: 24px; cursor: pointer; }

.download-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 24px;
  border: 2px solid var(--ink);
  border-radius: 6px;
  background: var(--pink);
  color: white;
  font-weight: 900;
  box-shadow: 5px 5px 0 var(--ink);
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
}
.download-btn:hover { transform: translate(2px, 2px); box-shadow: 3px 3px 0 var(--ink); background: var(--pink-dark); }
.download-btn.secondary { background: var(--white); color: var(--ink); }

.hero { overflow: hidden; border-bottom: 1px solid var(--line); }
.hero-grid { position: relative; min-height: 690px; padding-block: 124px 80px; }
.hero-grid > div:first-child { position: relative; z-index: 3; width: 58%; }
.eyebrow { margin: 0 0 18px; color: var(--pink-dark); font-size: 14px; font-weight: 900; letter-spacing: 0; text-transform: uppercase; }
h1, h2, h3 { line-height: 1.2; margin-top: 0; }
.hero h1 { max-width: 700px; margin-bottom: 22px; font-size: clamp(46px, 7vw, 88px); letter-spacing: 0; }
.hero-lead { max-width: 660px; margin: 0 0 30px; color: #414b5e; font-size: 19px; }
.hero-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 16px; }
.text-link { font-weight: 900; border-bottom: 2px solid var(--pink); }
.trust-row { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 34px; }
.trust-row span { padding: 7px 11px; border: 1px solid var(--line); background: var(--white); font-size: 13px; font-weight: 700; }
.hero-visual { position: absolute; right: 0; bottom: 55px; width: 46%; min-height: 520px; display: grid; place-items: center; }
.hero-visual::before { content: ""; position: absolute; inset: 42px 0 34px 32px; background: var(--cyan); border: 3px solid var(--ink); transform: rotate(2deg); }
.hero-phone { position: relative; width: min(310px, 78vw); padding: 12px; border: 3px solid var(--ink); border-radius: 8px; background: var(--ink); box-shadow: 14px 14px 0 var(--yellow); transform: rotate(-2deg); }
.hero-phone img { width: 100%; max-width: 400px; border-radius: 4px; }
.note-sticker { position: absolute; right: -5px; top: 52px; z-index: 2; padding: 10px 14px; background: var(--yellow); border: 2px solid var(--ink); font-weight: 900; transform: rotate(5deg); }

.section { padding-block: 88px; }
.section.white { background: var(--white); border-block: 1px solid var(--line); }
.section.dark { background: var(--ink); color: white; }
.section-head { display: flex; align-items: end; justify-content: space-between; gap: 24px; margin-bottom: 36px; }
.section-head h2, .section > .container > h2 { margin-bottom: 0; font-size: clamp(30px, 4vw, 48px); }
.section-kicker { color: var(--pink-dark); font-weight: 900; }
.dark .section-kicker { color: var(--yellow); }

.feature-grid { display: grid; grid-template-columns: repeat(4, 1fr); border-top: 2px solid var(--ink); border-left: 2px solid var(--ink); }
.feature-item { min-height: 255px; padding: 26px 22px; background: var(--white); border-right: 2px solid var(--ink); border-bottom: 2px solid var(--ink); }
.feature-number { display: inline-grid; place-items: center; width: 42px; height: 42px; margin-bottom: 28px; background: var(--yellow); border: 2px solid var(--ink); font-weight: 900; }
.feature-item:nth-child(2) .feature-number, .feature-item:nth-child(4) .feature-number { background: #b9f0ef; }
.feature-item h3 { margin-bottom: 10px; font-size: 20px; }
.feature-item p { margin: 0; color: var(--muted); }

.gallery-track { display: grid; grid-template-columns: repeat(6, minmax(210px, 1fr)); gap: 22px; overflow-x: auto; padding: 12px 8px 28px; scroll-snap-type: x mandatory; }
.app-shot { min-width: 0; scroll-snap-align: start; }
.app-shot img { width: 100%; max-width: 400px; margin-inline: auto; border: 2px solid var(--ink); border-radius: 8px; box-shadow: 8px 8px 0 rgba(25, 34, 52, .18); }
.app-shot figcaption { margin-top: 16px; font-weight: 900; text-align: center; }
.gallery-controls { display: flex; gap: 10px; }
.icon-button { width: 44px; height: 44px; border: 2px solid currentColor; border-radius: 5px; background: transparent; color: inherit; font-size: 25px; cursor: pointer; }

.path-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 54px; align-items: start; }
.path-steps { counter-reset: path; border-top: 2px solid var(--ink); }
.path-step { display: grid; grid-template-columns: 66px 1fr; gap: 20px; padding: 24px 0; border-bottom: 1px solid #cfc8bf; }
.path-step::before { counter-increment: path; content: "0" counter(path); color: var(--pink-dark); font-size: 28px; font-weight: 900; }
.path-step h3 { margin-bottom: 7px; }
.path-step p { margin: 0; color: var(--muted); }
.path-panel { position: sticky; top: 104px; padding: 34px; background: var(--yellow); border: 3px solid var(--ink); box-shadow: 12px 12px 0 var(--ink); }
.path-panel h2 { font-size: 36px; }
.path-panel ul { margin: 24px 0 28px; padding-left: 20px; }

.stat-strip { display: grid; grid-template-columns: repeat(3, 1fr); border: 2px solid var(--ink); background: var(--white); color: var(--ink); }
.stat { padding: 25px; text-align: center; border-right: 2px solid var(--ink); }
.stat:last-child { border-right: 0; }
.stat strong { display: block; font-size: 34px; }
.quote-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-top: 24px; }
.quote { margin: 0; padding: 24px; border: 1px solid rgba(255,255,255,.25); background: rgba(255,255,255,.06); }
.quote p { margin-top: 0; }
.quote cite { color: var(--yellow); font-style: normal; font-weight: 800; }

.faq-preview { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-top: 34px; }
.faq-item { border: 1px solid var(--line); background: var(--white); }
.faq-question { width: 100%; display: flex; justify-content: space-between; gap: 15px; padding: 20px; border: 0; background: transparent; color: var(--ink); font: inherit; font-weight: 900; text-align: left; cursor: pointer; }
.faq-question::after { content: "+"; font-size: 24px; line-height: 1; }
.faq-item.open .faq-question::after { content: "−"; }
.faq-answer { display: none; padding: 0 20px 20px; color: var(--muted); }
.faq-answer p { margin: 0; }
.faq-item.open .faq-answer { display: block; }

.bottom-cta { background: var(--cyan); border-top: 3px solid var(--ink); border-bottom: 3px solid var(--ink); }
.cta-row { min-height: 235px; display: flex; align-items: center; justify-content: space-between; gap: 36px; }
.cta-row h2 { max-width: 680px; margin: 0; font-size: clamp(30px, 5vw, 52px); }

.page-hero { padding: 78px 0 68px; background: var(--white); border-bottom: 2px solid var(--ink); }
.page-hero .container { display: grid; grid-template-columns: 1fr auto; align-items: end; gap: 45px; }
.page-hero h1 { max-width: 850px; margin-bottom: 18px; font-size: clamp(40px, 6vw, 72px); }
.page-hero p { max-width: 780px; margin: 0; color: var(--muted); font-size: 18px; }
.page-badge { width: 145px; height: 145px; display: grid; place-items: center; padding: 16px; background: var(--yellow); border: 3px solid var(--ink); border-radius: 50%; font-weight: 900; text-align: center; transform: rotate(6deg); }

.content-layout { display: grid; grid-template-columns: minmax(0, 1fr) 280px; gap: 55px; align-items: start; }
.article { min-width: 0; }
.article section { margin-bottom: 72px; scroll-margin-top: 100px; }
.article h2 { margin-bottom: 22px; font-size: clamp(28px, 4vw, 42px); }
.article h3 { margin: 26px 0 10px; font-size: 22px; }
.article p { margin: 0 0 16px; color: #414b5e; }
.article ul, .article ol { color: #414b5e; }
.article a { color: var(--pink-dark); font-weight: 800; text-decoration: underline; text-decoration-thickness: 2px; text-underline-offset: 3px; }
.side-nav { position: sticky; top: 98px; padding: 22px; background: var(--white); border: 2px solid var(--ink); }
.side-nav strong { display: block; margin-bottom: 12px; }
.side-nav a { display: block; padding: 9px 0; color: var(--muted); border-bottom: 1px solid var(--line); }
.side-nav a:hover { color: var(--pink-dark); }

.step-card { display: grid; grid-template-columns: 70px minmax(0, 1fr) minmax(190px, 280px); gap: 22px; align-items: center; padding: 24px 0; border-top: 2px solid var(--ink); }
.step-index { width: 54px; height: 54px; display: grid; place-items: center; background: var(--pink); color: white; border: 2px solid var(--ink); font-size: 20px; font-weight: 900; }
.step-card img { width: 100%; max-width: 240px; max-height: 400px; object-fit: cover; object-position: top; border: 2px solid var(--ink); border-radius: 6px; }
.callout { padding: 22px 24px; background: #e8f9f8; border-left: 5px solid var(--cyan); }
.check-list { display: grid; grid-template-columns: 1fr 1fr; gap: 12px 26px; padding: 0; list-style: none; }
.check-list li { position: relative; padding-left: 28px; }
.check-list li::before { content: "✓"; position: absolute; left: 0; color: var(--pink-dark); font-weight: 900; }

.topic-table { width: 100%; border-collapse: collapse; background: var(--white); }
.topic-table th, .topic-table td { padding: 15px; border: 1px solid #d8d3cc; text-align: left; vertical-align: top; }
.topic-table th { background: var(--ink); color: white; }
.topic-table td:first-child { font-weight: 900; }
.faq-list .faq-item { margin-bottom: 12px; border: 1px solid #d8d3cc; }
.faq-list .faq-question { font-size: 17px; }
.related-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.related-link { display: block; padding: 22px; background: var(--white); border: 2px solid var(--ink); text-decoration: none !important; box-shadow: 6px 6px 0 var(--yellow); }
.related-link strong { display: block; margin-bottom: 5px; color: var(--ink); }
.related-link span { color: var(--muted); font-weight: 400; }

.site-footer { padding: 50px 0 28px; background: var(--ink); color: white; }
.footer-grid { display: grid; grid-template-columns: 1.1fr .9fr; gap: 40px; }
.footer-brand p { max-width: 560px; color: #bdc4d0; }
.footer-links { display: flex; justify-content: flex-end; flex-wrap: wrap; gap: 22px; align-content: start; }
.footer-links a:hover { color: var(--yellow); }
.disclaimer { margin: 35px 0 0; padding-top: 22px; border-top: 1px solid rgba(255,255,255,.17); color: #9fa8b7; font-size: 13px; }
.copyright { margin: 8px 0 0; color: #9fa8b7; font-size: 13px; }

@media (max-width: 980px) {
  .feature-grid { grid-template-columns: repeat(2, 1fr); }
  .gallery-track { grid-template-columns: repeat(6, 240px); }
  .quote-grid { grid-template-columns: 1fr; }
  .content-layout { grid-template-columns: 1fr; }
  .side-nav { position: static; display: grid; grid-template-columns: repeat(2, 1fr); gap: 0 20px; }
  .side-nav strong { grid-column: 1 / -1; }
}

@media (max-width: 760px) {
  .container { width: min(calc(100% - 28px), var(--max)); }
  .menu-toggle { display: block; }
  .nav-links { position: fixed; inset: 72px 0 auto; display: none; padding: 20px; background: var(--paper); border-bottom: 2px solid var(--ink); flex-direction: column; align-items: stretch; gap: 3px; }
  .nav-links.open { display: flex; }
  .nav-links a:not(.download-btn) { padding: 12px; border-bottom: 1px solid var(--line); }
  .hero-grid { min-height: 620px; padding-block: 46px 0; }
  .hero-grid > div:first-child { width: 100%; }
  .hero h1 { font-size: 48px; }
  .hero-lead { font-size: 17px; }
  .hero-visual { right: -42px; bottom: -90px; z-index: 0; width: 290px; min-height: 440px; opacity: .17; pointer-events: none; }
  .hero-phone { width: 220px; box-shadow: 10px 10px 0 var(--yellow); }
  .note-sticker { display: none; }
  .feature-grid { grid-template-columns: 1fr; }
  .section { padding-block: 64px; }
  .section-head { align-items: flex-start; flex-direction: column; }
  .path-grid, .footer-grid { grid-template-columns: 1fr; }
  .path-panel { position: static; }
  .stat-strip { grid-template-columns: 1fr; }
  .stat { border-right: 0; border-bottom: 2px solid var(--ink); }
  .stat:last-child { border-bottom: 0; }
  .faq-preview { grid-template-columns: 1fr; }
  .cta-row { padding-block: 48px; align-items: flex-start; flex-direction: column; }
  .page-hero .container { grid-template-columns: 1fr; }
  .page-badge { width: 110px; height: 110px; }
  .step-card { grid-template-columns: 58px 1fr; }
  .step-card img { grid-column: 2; max-width: 210px; }
  .check-list, .related-grid { grid-template-columns: 1fr; }
  .footer-links { justify-content: flex-start; }
}

@media (max-width: 430px) {
  .hero h1 { font-size: 40px; }
  .trust-row { gap: 8px; margin-top: 24px; }
  .trust-row span { padding: 6px 8px; font-size: 12px; }
  .step-card { grid-template-columns: 1fr; }
  .step-card img { grid-column: 1; }
  .side-nav { grid-template-columns: 1fr; }
  .topic-table { display: block; overflow-x: auto; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { transition: none !important; }
}