/* Same typeface as the live site; served locally to avoid a third-party font request. */
@font-face {
  font-family: 'Noto Sans SC';
  src: url('/assets/fonts/noto-sans-sc-site.woff2?v=20261102-1') format('woff2');
  font-style: normal;
  font-weight: 100 900;
  font-display: swap;
}
:root {
  --brand: #f04e6e;
  --brand-dark: #cc3157;
  --brand-soft: #fff0f3;
  --brand-mid: #fddde4;
  --ink: #27202a;
  --ink-soft: #574c56;
  --ink-mute: #71636f;
  --surface: #fff8fa;
  --white: #ffffff;
  --scroll-thumb: #b8a3ac;
  --scroll-track: #fff8fa;
  --scroll-hover: #937985;
  --font: 'Noto Sans SC', 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', sans-serif;
  --body: 16px;
  --small: 14px;
  --lead: 20px;
  --section-size: clamp(26px, 2.5vw, 32px);
  --hero-size: clamp(36px, 4vw, 48px);
  --radius: 20px;
  --radius-card: 14px;
  --surface-quiet: #faf9fa;
  --motion-fast: 180ms;
  --motion-enter: 300ms;
  --page-pad: clamp(20px, 4vw, 48px);
  --ease: cubic-bezier(.16, 1, .3, 1);
  color-scheme: light;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 30px; scrollbar-gutter: stable; }
* { scrollbar-width: thin; scrollbar-color: var(--scroll-thumb) var(--scroll-track); }
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: var(--scroll-track); }
::-webkit-scrollbar-thumb { background: var(--scroll-thumb); border: 2px solid var(--scroll-track); border-radius: 10px; }
::-webkit-scrollbar-thumb:hover, ::-webkit-scrollbar-thumb:active { background: var(--scroll-hover); }
@media (forced-colors: active) { * { scrollbar-color: auto; } }
body { margin: 0; color: var(--ink); background: var(--white); font-family: var(--font); font-size: var(--body); line-height: 1.75; -webkit-font-smoothing: antialiased; }
h1, h2, h3, p { margin: 0; }
a { color: inherit; text-decoration: none; }
button { font: inherit; }
a, button, summary { cursor: pointer; }
img { display: block; max-width: 100%; }
button, a, summary { -webkit-tap-highlight-color: transparent; }
:focus-visible { outline: 3px solid var(--brand); outline-offset: 5px; }
::selection { background: var(--brand-mid); color: var(--ink); }
.skip-link { position: absolute; top: -100px; left: var(--page-pad); background: var(--white); padding: 10px 20px; z-index: 10; }
.skip-link:focus { top: 12px; }
nav[aria-label='主导航'] { max-width: 1168px; margin: 0 auto; padding: 16px var(--page-pad); display: flex; align-items: center; justify-content: space-between; min-height: 76px; gap: 24px; }
.nav-brand { display: inline-flex; align-items: center; gap: 11px; color: var(--ink); font-size: var(--lead); font-weight: 700; }
.nav-brand img { width: 38px; height: 38px; border-radius: 11px; }
.nav-links { display: flex; align-items: center; gap: 30px; list-style: none; padding: 0; margin: 0; }
.nav-links a { display: inline-flex; align-items: center; min-height: 44px; font-size: var(--small); }
.nav-links a:hover { color: var(--brand-dark); }
.nav-links .nav-cta { color: var(--brand-dark); background: var(--brand-soft); border-radius: 999px; padding: 9px 23px; font-weight: 600; }
.menu-toggle { display: none; border: 0; background: var(--brand-soft); color: var(--ink); min-height: 44px; padding: 8px 18px; border-radius: 999px; }
.hero { max-width: 1168px; padding: 64px var(--page-pad); margin: 0 auto; display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
/* The user explicitly requests the original positioning label above the headline. */
.hero-positioning { display: inline-block; background: var(--brand-soft); color: var(--brand-dark); border-radius: 999px; padding: 6px 13px; font-size: 14px; font-weight: 500; line-height: 1.6; margin-bottom: 22px; }
h1 { font-size: var(--hero-size); font-weight: 700; line-height: 1.25; letter-spacing: normal; }
.brand-word { color: var(--brand); }
.hero-sub { color: var(--ink-soft); font-size: 16px; max-width: 28em; margin: 24px 0 28px; line-height: 1.85; }
.hero-actions { display: flex; gap: 16px; align-items: center; flex-wrap: wrap; }
.btn-primary, .btn-secondary { display: inline-flex; align-items: center; justify-content: center; min-height: 52px; border-radius: 999px; padding: 12px 27px; font-size: 19px; font-weight: 600; line-height: 1.5; transition: transform 200ms var(--ease), opacity 200ms; }
.btn-primary { background: var(--brand); color: var(--white); }
.btn-secondary { background: var(--brand-soft); color: var(--brand-dark); }
/* Larger bold white labels retain contrast on the logo’s bright coral red. */
.btn-primary { font-size: 19px; font-weight: 700; line-height: 1.5; }
.nav-links .nav-cta:hover { color: var(--brand-dark); background: var(--brand-mid); }
.btn-primary:hover, .btn-secondary:hover { transform: translateY(-2px); }
.btn-primary:active, .btn-secondary:active { transform: translateY(1px); }
.hero-visual { min-width: 0; display: flex; align-items: center; justify-content: center; gap: 24px; padding: 28px 20px; background: var(--surface); border-radius: 32px; }
/* Crop the existing official artwork through CSS; the source asset is unchanged. */
.phone-crop { position: relative; width: 224px; aspect-ratio: 450 / 930; overflow: hidden; border-radius: 36px; flex-shrink: 0; background: var(--brand-soft); }
.phone-crop img { position: absolute; width: 140%; max-width: none; height: auto; left: -20%; top: -38.5%; }
.hero-directions { min-width: 0; }
.hero-directions > p { font-size: 16px; color: var(--ink-soft); }
.hero-directions dl { margin: 24px 0; display: grid; gap: 28px; }
.hero-directions dt { font-weight: 600; font-size: 18px; }
.hero-directions dd { margin: 6px 0 0; font-size: 14px; color: var(--ink-soft); }
.image-caption { font-size: 13px; color: var(--ink-mute); }
.stats-bar { background: var(--brand-soft); padding: 30px var(--page-pad); }
.stats-inner { max-width: 1072px; margin: 0 auto; display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.stat-item { text-align: center; }
.stat-num { display: block; color: var(--ink); font-size: var(--lead); font-weight: 600; line-height: 1.4; }
.stat-label { color: var(--ink-soft); font-size: var(--small); margin-top: 6px; }
.section { max-width: 1168px; margin: 0 auto; padding: 80px var(--page-pad); }
.section-title { font-size: var(--section-size); font-weight: 700; line-height: 1.4; letter-spacing: normal; margin-bottom: 16px; }
.section-desc { color: var(--ink-soft); font-size: var(--body); max-width: 42em; margin-bottom: 32px; }
.feature-showcase { display: grid; grid-template-columns: 1fr 1.2fr; gap: 64px; align-items: center; }
.feature-preview { margin: 0; padding: 28px; border-radius: 28px; background: var(--brand-soft); display: grid; justify-items: center; gap: 20px; }
.feature-preview .phone-crop { width: 224px; }
.feature-preview figcaption { color: var(--ink-soft); font-size: 16px; }
.feature-list { display: grid; gap: 28px; }
.feature-title { font-size: var(--lead); line-height: 1.5; font-weight: 600; }
.feature-text { color: var(--ink-soft); font-size: var(--body); margin-top: 8px; line-height: 1.85; max-width: 30em; }
.full-divider { display: none; }
.usecases { background: var(--surface); padding: 80px var(--page-pad); }
.usecases-inner { max-width: 1072px; margin: 0 auto; }
.usecases-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 28px; }
.usecase-item { padding: 24px 0 0; }
.text-link { display: inline-flex; align-items: center; gap: 10px; min-height: 44px; margin-top: 16px; color: var(--brand-dark); font-weight: 600; }
.text-link:hover { text-decoration: underline; text-underline-offset: 4px; }
.usecase-title { font-size: var(--lead); font-weight: 600; line-height: 1.5; }
.usecase-summary { font-weight: 500; margin-top: 16px; }
.usecase-desc { margin-top: 8px; color: var(--ink-soft); font-size: var(--body); }
.how-steps { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 40px; padding: 0; margin: 0; list-style: none; }
.step { position: relative; min-width: 0; }
.step-number { position: relative; z-index: 1; display: grid; place-items: center; width: 44px; height: 44px; margin-bottom: 20px; border-radius: 50%; background: var(--brand-soft); color: var(--brand-dark); font-size: 22px; font-weight: 600; }
.step:not(:last-child)::after { content: ''; position: absolute; top: 21px; left: 56px; right: -28px; height: 2px; background: var(--brand-mid); }
.step-title { font-size: var(--lead); font-weight: 600; line-height: 1.5; }
.step-desc { color: var(--ink-soft); margin-top: 12px; font-size: var(--body); }
#guides { padding-top: 0; }
.guide-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.guide-card { display: grid; grid-template-columns: minmax(0, 1fr) 24px; grid-template-rows: auto 1fr; column-gap: 20px; row-gap: 10px; align-items: start; padding: 28px; background: var(--surface); border-radius: var(--radius-card); transition: background-color var(--motion-fast) var(--ease); }
.guide-card-featured { grid-column: 1 / -1; background: var(--brand-soft); padding: 32px; }
.guide-card strong { grid-column: 1; font-size: 18px; font-weight: 600; line-height: 1.5; }
.guide-card .guide-description { grid-column: 1; grid-row: 2; color: var(--ink-soft); font-size: var(--body); line-height: 1.75; }
.guide-card .guide-arrow { grid-column: 2; grid-row: 1 / 3; align-self: center; justify-self: end; color: var(--brand-dark); font-size: 24px; line-height: 1; transition: transform var(--motion-fast) var(--ease); }
.guide-card:hover, .guide-card:focus-visible { background: var(--brand-soft); }
.guide-card:hover strong { color: var(--brand-dark); }
.guide-card:hover .guide-arrow { transform: translateX(3px); }
.guide-card:active .guide-arrow { transform: translateX(1px); }
#faq { padding-top: 0; display: grid; grid-template-columns: 1fr 2fr; gap: 48px; align-items: start; }
.faq-list { display: grid; gap: 10px; margin-top: 0; }
details { background: var(--surface-quiet); padding: 0 28px; border-radius: 12px; transition: background-color var(--motion-fast) var(--ease); }
details[open] { background: var(--surface); }
summary { display: flex; align-items: center; justify-content: space-between; min-height: 76px; gap: 20px; padding: 18px 0; cursor: pointer; list-style: none; font-size: var(--body); font-weight: 600; }
summary::-webkit-details-marker { display: none; }
.summary-icon { font-size: var(--lead); color: var(--brand); line-height: 1; transition: transform 220ms var(--ease); }
details[open] .summary-icon { transform: rotate(45deg); }
.faq-answer { padding-bottom: 24px; color: var(--ink-soft); max-width: 60ch; }
.faq-answer a { color: var(--brand-dark); text-decoration: underline; text-underline-offset: 4px; }
.download { background: var(--brand-soft); text-align: center; padding: 80px var(--page-pad); }
.download h2 { font-size: var(--section-size); line-height: 1.4; }
.download > p { color: var(--ink-soft); margin: 16px auto 28px; max-width: 40ch; }
.download-options { max-width: 1072px; margin: 32px auto 0; display: grid; grid-template-columns: 1fr 1.4fr 180px; gap: 32px; text-align: left; align-items: center; background: var(--white); padding: 36px; border-radius: 24px; }
.download-platform h3 { font-size: var(--lead); margin-bottom: 10px; }
.download-platform p { color: var(--ink-soft); }
.download-platform .btn-primary { margin-top: 20px; gap: 12px; }
.download-platform .download-markets { margin-top: 14px; font-size: 14px; }
.download-platform .download-publisher { margin-top: 8px; font-size: 14px; }
.download-qr { margin: 0; text-align: center; justify-self: center; }
.download-qr img { background: white; margin: 0 auto 8px; }
.download-qr figcaption { font-size: 14px; line-height: 1.6; color: var(--ink-soft); }
footer { padding: 30px var(--page-pad); background: var(--white); color: var(--ink-soft); font-size: var(--small); }
.footer-inner { max-width: 1072px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; gap: 24px; flex-wrap: wrap; }
footer a:hover { color: var(--brand-dark); }
.footer-links { display: flex; gap: 24px; align-items: center; flex-wrap: wrap; }
@media (max-width: 1100px) {
  .hero { grid-template-columns: 1fr 1fr; gap: 28px; }
  .hero-visual { gap: 16px; padding: 24px 16px; }
  .hero-visual .phone-crop { width: 210px; }
  .hero-directions dt { font-size: 16px; }
  .hero-directions dd { font-size: 13px; }
  .feature-showcase { gap: 40px; }
  .download-options { grid-template-columns: 1fr 1.2fr; }
  .download-qr { display: none; }
}
@media (max-width: 900px) {
  nav[aria-label='主导航'] { min-height: 76px; padding-top: 16px; padding-bottom: 16px; flex-wrap: wrap; }
  .js-nav .menu-toggle { display: block; }
  .nav-links { width: 100%; justify-content: flex-start; gap: 12px 24px; flex-wrap: wrap; padding-top: 4px; }
  .js-nav .nav-links:not(.is-open) { display: none; }
  .nav-links .nav-cta { padding: 8px 16px; }
  .hero-visual { flex-direction: column; }
  .hero-directions { width: 100%; }
  .hero-directions > p, .hero-directions dd, .image-caption { display: none; }
  .hero-directions dl { margin: 0; display: flex; flex-wrap: wrap; gap: 6px 14px; justify-content: center; }
  .hero-directions dt { font-size: 14px; }
  .hero-sub { font-size: 16px; margin: 24px 0; }
  .hero-actions { gap: 12px; }
  .btn-primary, .btn-secondary { padding: 12px 20px; }
  .feature-showcase { grid-template-columns: .85fr 1.15fr; gap: 28px; }
  .feature-preview { padding: 24px 14px; }
  .feature-preview .phone-crop { width: 194px; border-radius: 30px; }
  .feature-list { gap: 20px; }
  .feature-title { font-size: 20px; }
  .usecases-grid { gap: 24px; }
  .section { padding-top: 64px; padding-bottom: 64px; }
  .how-steps { gap: 28px; }
  .step:not(:last-child)::after { right: -16px; }
  #faq { display: block; }
  .faq-list { margin-top: 28px; }
  .guide-card { padding: 24px; }
}
@media (max-width: 600px) {
  .hero { grid-template-columns: 1fr; gap: 32px; padding-top: 28px; padding-bottom: 40px; }
  .hero h1 { font-size: 36px; }
  .hero-sub { margin: 24px 0; max-width: none; }
  .hero-visual { flex-direction: row; gap: 18px; padding: 24px 16px; border-radius: 24px; }
  .hero-visual .phone-crop { width: clamp(132px, 40vw, 170px); border-radius: 24px; }
  .hero-directions dl { display: grid; gap: 24px; justify-content: start; }
  .hero-directions dt { font-size: 16px; line-height: 1.5; }
  .hero-directions dd { display: block; font-size: 14px; line-height: 1.6; }
  .stats-inner { grid-template-columns: 1fr 1fr; gap: 24px 16px; }
  .stats-bar { padding-top: 28px; padding-bottom: 28px; }
  .section-desc { margin-bottom: 28px; }
  .feature-showcase { grid-template-columns: 1fr; gap: 28px; }
  .feature-preview { padding: 24px; }
  .feature-preview .phone-crop { width: 190px; }
  .feature-list { gap: 24px; }
  .usecases { padding-top: 56px; padding-bottom: 56px; }
  .usecases-grid { grid-template-columns: 1fr; gap: 32px; }
  .usecase-item { padding-top: 0; }
  .usecase-summary { margin-top: 10px; }
  .how-steps { grid-template-columns: 1fr; gap: 28px; }
  .step { padding-left: 64px; }
  .step-number { position: absolute; left: 0; top: 0; margin: 0; }
  .step-title { min-height: 44px; display: flex; align-items: center; }
  .step:not(:last-child)::after { top: 56px; bottom: -16px; left: 21px; right: auto; height: auto; width: 2px; }
  .step-desc { margin-top: 10px; }
  .guide-grid { grid-template-columns: 1fr; }
  .guide-card-featured { grid-column: auto; }
  .guide-card { padding: 24px; column-gap: 16px; }
  .guide-card strong { font-size: 18px; }
  details { padding: 0 20px; }
  .download { padding-top: 56px; padding-bottom: 56px; }
  .download-options { grid-template-columns: 1fr; padding: 24px; gap: 32px; }
  .download-platform .btn-primary { width: 100%; }
  .footer-inner { gap: 16px; }
}
@media (max-width: 360px) { .hero-actions .btn-primary, .hero-actions .btn-secondary { padding-inline: 16px; } .hero-visual { gap: 12px; padding: 20px 12px; } .hero-visual .phone-crop { width: 132px; } .hero h1 { font-size: 32px; } }
@media (prefers-reduced-motion: no-preference) {
  .hero-content, .hero-visual { animation: rise var(--motion-enter) var(--ease) both; }
  @keyframes rise { from { opacity: .85; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }
}
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { animation: none !important; transition: none !important; } }

.guide-filters { display: none; align-items: center; gap: 10px; flex-wrap: wrap; margin: -12px 0 24px; }
.has-guide-filters .guide-filters { display: flex; }
.guide-filters button { display: inline-flex; align-items: center; gap: 8px; padding: 8px 14px; min-height: 44px; border: 2px solid transparent; border-radius: 999px; background: var(--surface-quiet); color: var(--ink-soft); cursor: pointer; transition: background-color var(--motion-fast), border-color var(--motion-fast); }
.filter-check { width: 14px; font-size: 14px; line-height: 1; opacity: 0; }
.guide-filters button[aria-pressed='true'] { background: var(--brand-soft); color: var(--brand-dark); border-color: var(--brand-dark); }
.guide-filters button[aria-pressed='true'] .filter-check { opacity: 1; }
.guide-filters button:hover { background: var(--brand-soft); }
.guide-filter-result { color: var(--ink-soft); font-size: var(--small); }
.guide-card[hidden] { display: none; }

.nav-links [aria-current] { color: var(--brand-dark); text-decoration: underline; text-underline-offset: 6px; }
.menu-toggle:hover, summary:hover { background: var(--brand-soft); }
.menu-toggle:active, .guide-filters button:active { transform: translateY(1px); }