:root {
  color-scheme: light;
  --brand: #e50914;
  --brand-dark: #b70710;
  --ink: #141519;
  --muted: #5c6470;
  --soft: #f5f6f8;
  --line: #e3e5ea;
  --panel: #ffffff;
  --panel-dark: #1b1d22;
  --cream: #fff7f1;
  --green: #1f8a5b;
  --blue: #2f6fb3;
  --shadow: 0 24px 70px rgba(20, 21, 25, 0.12);
  font-family:
    ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono",
    "Courier New", "Microsoft YaHei", monospace;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: #ffffff;
  color: var(--ink);
  letter-spacing: 0;
}

body.nav-open {
  overflow: hidden;
}

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

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

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

.section-shell {
  width: min(1120px, calc(100% - 40px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 14px max(20px, calc((100vw - 1120px) / 2));
  border-bottom: 1px solid rgba(227, 229, 234, 0.82);
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(18px);
}

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

.brand img {
  width: 36px;
  height: 36px;
  border-radius: 8px;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
}

.site-nav a {
  padding: 10px 12px;
  border-radius: 8px;
}

.site-nav a:hover {
  color: var(--ink);
  background: var(--soft);
}

.site-nav a.is-active {
  color: var(--ink);
  background: var(--soft);
}

.site-nav .nav-cta {
  color: #ffffff;
  background: var(--brand);
}

.site-nav .nav-cta:hover {
  color: #ffffff;
  background: var(--brand-dark);
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #ffffff;
  padding: 9px;
}

.nav-toggle span {
  display: block;
  width: 100%;
  height: 2px;
  margin: 5px 0;
  border-radius: 99px;
  background: var(--ink);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(420px, 0.9fr);
  align-items: center;
  gap: 56px;
  padding: 86px 0 72px;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--brand);
  font-size: 13px;
  font-weight: 900;
}

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

h1 {
  max-width: 720px;
  margin-bottom: 20px;
  font-size: clamp(34px, 5vw, 58px);
  line-height: 1.08;
  font-weight: 900;
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(26px, 3.2vw, 38px);
  line-height: 1.18;
  font-weight: 900;
}

h3 {
  margin-bottom: 10px;
  font-size: 18px;
  line-height: 1.35;
}

.hero-lede,
.section-heading p,
.privacy-layout p,
.contact-copy p {
  color: var(--muted);
  font-size: 16px;
  line-height: 1.75;
}

.hero-lede {
  max-width: 700px;
  margin-bottom: 28px;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 26px;
}

.button,
.copy-button,
.contact-share-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  border: 0;
  border-radius: 8px;
  padding: 0 18px;
  font: inherit;
  font-size: 15px;
  font-weight: 900;
  cursor: pointer;
}

.button-primary,
.copy-button {
  color: #ffffff;
  background: var(--brand);
}

.button-primary:hover,
.copy-button:hover {
  background: var(--brand-dark);
}

.button-secondary {
  color: var(--ink);
  background: var(--soft);
  border: 1px solid var(--line);
}

.button-share,
.contact-share-button {
  color: var(--brand);
  background: #fff0f1;
  border: 1px solid #ffd3d6;
}

.button-share:hover,
.contact-share-button:hover {
  color: var(--brand-dark);
  background: #ffe5e7;
}

.trust-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.trust-row span {
  padding: 8px 11px;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--muted);
  background: #ffffff;
  font-size: 13px;
  font-weight: 800;
}

.product-preview {
  position: relative;
}

.product-preview::before {
  position: absolute;
  inset: -24px 28px 34px -10px;
  content: "";
  border-radius: 8px;
  background: var(--cream);
  transform: rotate(-3deg);
}

.preview-window {
  position: relative;
  overflow: hidden;
  border: 1px solid #d7dbe2;
  border-radius: 8px;
  background: #f2f2f7;
  box-shadow: var(--shadow);
}

.preview-toolbar {
  display: grid;
  grid-template-columns: 72px 1fr auto;
  align-items: center;
  gap: 12px;
  padding: 14px;
  border-bottom: 1px solid #dedfe5;
  background: #ffffff;
}

.preview-toolbar strong,
.preview-toolbar small {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.preview-toolbar small {
  color: var(--muted);
  font-size: 12px;
}

.traffic-lights span {
  display: inline-block;
  width: 10px;
  height: 10px;
  margin-right: 5px;
  border-radius: 50%;
  background: #d5d8de;
}

.traffic-lights span:first-child {
  background: var(--brand);
}

.preview-body {
  padding: 16px;
}

.continue-card,
.player-strip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 14px;
  border-radius: 8px;
  background: #ffffff;
}

.continue-card {
  min-height: 82px;
  margin-bottom: 14px;
  padding: 16px;
  border-left: 4px solid var(--brand);
}

.continue-card strong,
.media-grid strong {
  display: block;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.card-label,
.media-grid small {
  display: block;
  margin-bottom: 6px;
  color: var(--muted);
  font-size: 12px;
}

.media-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
}

.media-grid article {
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 10px;
  background: #ffffff;
}

.thumb {
  display: block;
  aspect-ratio: 4 / 3;
  margin-bottom: 10px;
  border-radius: 6px;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.3), transparent),
    var(--brand);
}

.thumb.green {
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.3), transparent),
    var(--green);
}

.thumb.blue {
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.3), transparent),
    var(--blue);
}

.player-strip {
  margin-top: 14px;
  padding: 14px;
  color: #ffffff;
  background: var(--panel-dark);
  font-size: 12px;
  font-weight: 800;
}

.progress {
  flex: 1;
  height: 6px;
  overflow: hidden;
  border-radius: 99px;
  background: rgba(255, 255, 255, 0.18);
}

.progress i {
  display: block;
  width: 42%;
  height: 100%;
  border-radius: inherit;
  background: var(--brand);
}

.pain-section,
.contact-section {
  background: var(--soft);
}

.pain-section {
  padding: 72px 0;
}

.split {
  display: grid;
  grid-template-columns: 0.82fr 1.18fr;
  gap: 44px;
}

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

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

.audience-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 22px;
  background: var(--panel);
}

.audience-card.is-fit {
  border-color: #b9dfcf;
  background: #f2fbf6;
}

.audience-card strong {
  display: block;
  margin-bottom: 14px;
  font-size: 20px;
}

.audience-card ul {
  display: grid;
  gap: 10px;
  margin: 0;
  padding-left: 20px;
  color: var(--muted);
  line-height: 1.65;
}

.pain-list article,
.feature-grid article,
.scenario-row article {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 20px;
  background: var(--panel);
}

.pain-list p,
.feature-grid p,
.scenario-row p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.7;
}

#features,
.scenarios {
  padding: 86px 0;
}

.product-evidence,
.download-section,
.faq-section {
  padding: 86px 0;
  background: var(--soft);
}

.section-heading {
  max-width: 760px;
  margin-bottom: 34px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.feature-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 28px;
  margin-bottom: 20px;
  border-radius: 6px;
  color: var(--brand);
  background: #fff0f1;
  font-size: 13px;
  font-weight: 900;
}

.screen-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.screen-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 18px;
  background: #ffffff;
}

.screen-card h3 {
  margin-top: 18px;
}

.screen-card p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.7;
}

.phone-frame {
  overflow: hidden;
  min-height: 280px;
  border: 1px solid #d8dde6;
  border-radius: 8px;
  background: #f8f9fb;
}

.phone-top {
  padding: 14px 16px;
  border-bottom: 1px solid var(--line);
  background: #ffffff;
  font-weight: 900;
}

.library-list,
.setting-list {
  display: grid;
  gap: 10px;
  padding: 16px;
}

.library-list span,
.setting-list span {
  display: flex;
  align-items: center;
  min-height: 52px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0 14px;
  background: #ffffff;
  font-weight: 800;
}

.library-list span:first-child {
  border-left: 4px solid var(--brand);
}

.dark-phone {
  display: flex;
  align-items: flex-end;
  color: #ffffff;
  background:
    linear-gradient(180deg, rgba(255, 255, 255, 0.08), transparent),
    #17191f;
}

.player-view {
  width: 100%;
  padding: 18px;
}

.player-view span,
.player-view small {
  display: block;
  font-weight: 900;
}

.player-view i {
  display: block;
  height: 7px;
  margin: 18px 0 12px;
  border-radius: 99px;
  background:
    linear-gradient(90deg, var(--brand) 48%, rgba(255, 255, 255, 0.2) 48%);
}

.player-view small {
  color: rgba(255, 255, 255, 0.72);
  font-size: 12px;
}

.download-section {
  background: #ffffff;
}

.download-layout {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(360px, 0.78fr);
  align-items: center;
  gap: 44px;
}

.download-copy p {
  max-width: 700px;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.75;
}

.download-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 24px;
}

.download-qr-card {
  justify-self: end;
  width: min(100%, 290px);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
  text-align: center;
  background: var(--soft);
  box-shadow: 0 18px 54px rgba(20, 21, 25, 0.08);
}

.download-qr-card img {
  width: 100%;
  border-radius: 6px;
  background: #ffffff;
}

.download-qr-card strong {
  display: block;
  margin-top: 12px;
}

.download-qr-card span {
  display: block;
  margin-top: 6px;
  color: var(--muted);
  font-size: 13px;
}

.privacy-band {
  padding: 82px 0;
  color: #ffffff;
  background: #15171c;
}

.privacy-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  align-items: center;
  gap: 48px;
}

.privacy-layout p {
  color: rgba(255, 255, 255, 0.72);
}

.privacy-checks {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
}

.privacy-checks span {
  min-height: 58px;
  border: 1px solid rgba(255, 255, 255, 0.13);
  border-radius: 8px;
  padding: 18px;
  background: rgba(255, 255, 255, 0.06);
  font-weight: 900;
}

.scenario-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}

.version-row article {
  min-height: 160px;
}

.faq-section {
  background: #ffffff;
}

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

.faq-grid article {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 20px;
  background: var(--soft);
}

.faq-grid p {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.7;
}

.contact-section {
  padding: 82px 0;
}

.contact-card {
  display: grid;
  grid-template-columns: 1fr 310px;
  align-items: center;
  gap: 40px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 34px;
  background: #ffffff;
  box-shadow: 0 18px 54px rgba(20, 21, 25, 0.08);
}

.contact-copy h2 {
  max-width: 680px;
}

.contact-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 8px 0 16px;
}

.copy-button,
.contact-share-button {
  margin: 8px 0 16px;
}

.contact-actions .copy-button,
.contact-actions .contact-share-button {
  margin: 0;
}

.copy-button.copied,
.share-button.shared {
  background: var(--green);
  border-color: var(--green);
  color: #ffffff;
}

.contact-note {
  margin: 0;
  font-size: 14px;
}

.qr-card {
  justify-self: end;
  width: min(100%, 290px);
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
  text-align: center;
  background: var(--soft);
}

.qr-card img {
  width: 100%;
  max-height: 360px;
  object-fit: contain;
  border-radius: 6px;
  background: #ffffff;
}

.qr-card strong {
  display: block;
  margin-top: 12px;
}

.qr-card span {
  display: block;
  margin-top: 6px;
  color: var(--muted);
  font-size: 12px;
}

.site-footer {
  border-top: 1px solid var(--line);
  background: #ffffff;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.15fr auto 0.85fr;
  gap: 34px;
  align-items: start;
  padding: 28px 0;
}

.footer-brand {
  display: flex;
  gap: 14px;
  align-items: flex-start;
}

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

.footer-brand strong,
.footer-brand span,
.footer-links a {
  display: block;
}

.footer-brand strong {
  margin-bottom: 8px;
}

.footer-brand span,
.footer-links span,
.footer-links a,
.footer-qrs figcaption {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
}

.footer-qrs {
  display: flex;
  gap: 14px;
}

.footer-qrs figure {
  margin: 0;
  width: 96px;
  text-align: center;
}

.footer-qrs img {
  width: 96px;
  height: 96px;
  border: 1px solid var(--line);
  border-radius: 8px;
  object-fit: contain;
  background: #ffffff;
}

.footer-links {
  display: grid;
  gap: 6px;
  justify-items: end;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  padding: 22px 0;
  color: var(--muted);
  font-size: 13px;
}

.footer-inner span:first-child {
  color: var(--ink);
  font-weight: 900;
}

.page-hero {
  padding: 84px 0 34px;
}

.page-hero h1 {
  max-width: 900px;
}

.page-hero p:last-child {
  max-width: 760px;
  color: var(--muted);
  font-size: 17px;
  line-height: 1.8;
}

.doc-layout {
  display: grid;
  gap: 14px;
  padding: 28px 0 84px;
}

.doc-card {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 24px;
  background: #ffffff;
}

.doc-card p {
  color: var(--muted);
  line-height: 1.8;
}

.doc-card p:last-child {
  margin-bottom: 0;
}

.document-page {
  background: #ffffff;
}

.document-page .page-hero {
  padding-top: 72px;
}

.document-page .doc-card a {
  color: var(--brand);
  font-weight: 900;
  text-decoration: underline;
  text-underline-offset: 3px;
}

.document-grid {
  padding-bottom: 84px;
}

.about-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
  padding-bottom: 84px;
}

.compact-hero {
  min-height: auto;
  padding-top: 80px;
}

.large-qr {
  justify-self: end;
  width: min(100%, 340px);
}

.community-grid {
  padding-bottom: 84px;
}

.business-hero {
  padding: 86px 0;
  color: #ffffff;
  background: #15171c;
}

.business-hero .hero-lede {
  color: rgba(255, 255, 255, 0.72);
}

.business-panel {
  display: grid;
  gap: 12px;
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 8px;
  padding: 24px;
  background: rgba(255, 255, 255, 0.06);
}

.business-panel strong {
  margin-bottom: 6px;
  font-size: 20px;
}

.business-panel span {
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 8px;
  padding: 14px;
  background: rgba(255, 255, 255, 0.06);
}

.poster-layout {
  display: grid;
  grid-template-columns: minmax(0, 520px) 1fr;
  gap: 40px;
  align-items: start;
  padding: 24px 0 84px;
}

.poster-panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 14px;
  background: var(--soft);
}

#invite-poster {
  display: block;
  width: 100%;
  height: auto;
  border-radius: 6px;
  background: #ffffff;
}

.poster-actions {
  position: sticky;
  top: 86px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 24px;
  background: #ffffff;
}

.poster-actions p {
  color: var(--muted);
  line-height: 1.8;
}

@media (max-width: 920px) {
  .hero,
  .split,
  .privacy-layout,
  .download-layout,
  .contact-card {
    grid-template-columns: 1fr;
  }

  .hero {
    gap: 38px;
    min-height: auto;
    padding-top: 48px;
  }

  .product-preview {
    width: min(100%, 640px);
  }

  .feature-grid,
  .scenario-row,
  .screen-grid,
  .about-grid,
  .faq-grid,
  .poster-layout,
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .contact-card {
    padding: 26px;
  }

  .qr-card {
    justify-self: start;
  }

  .pain-section {
    padding-top: 44px;
  }

  .poster-actions {
    position: static;
  }

  .footer-links {
    justify-items: start;
  }
}

@media (max-width: 700px) {
  .section-shell {
    width: min(100% - 28px, 1120px);
  }

  .site-header {
    padding: 10px 14px;
  }

  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: fixed;
    top: 63px;
    right: 14px;
    left: 14px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: 8px;
    background: #ffffff;
    box-shadow: var(--shadow);
  }

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

  .site-nav a {
    padding: 13px 14px;
  }

  .hero {
    gap: 20px;
    padding: 16px 0 20px;
  }

  h1 {
    font-size: clamp(28px, 8.6vw, 36px);
  }

  h2 {
    font-size: clamp(24px, 7.2vw, 32px);
  }

  .hero-lede,
  .section-heading p,
  .privacy-layout p,
  .contact-copy p {
    font-size: 15px;
  }

  .hero-actions {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 10px;
    margin-bottom: 16px;
  }

  .button,
  .copy-button,
  .contact-share-button {
    width: 100%;
  }

  .hero-actions .button-share {
    grid-column: 1 / -1;
  }

  .button {
    min-height: 46px;
    padding: 0 12px;
    font-size: 14px;
  }

  .contact-actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .hero-lede {
    margin-bottom: 18px;
  }

  .trust-row span {
    padding: 7px 9px;
    font-size: 12px;
  }

  .trust-row {
    display: none;
  }

  .preview-body {
    padding: 10px;
  }

  .preview-toolbar {
    grid-template-columns: 1fr auto;
    gap: 8px;
    padding: 10px;
  }

  .traffic-lights {
    display: none;
  }

  .continue-card {
    min-height: 58px;
    margin-bottom: 8px;
    padding: 10px;
  }

  .product-preview .media-grid {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 6px;
  }

  .media-grid article {
    padding: 6px;
  }

  .media-grid strong {
    font-size: 12px;
  }

  .media-grid small,
  .card-label {
    font-size: 10px;
  }

  .thumb {
    aspect-ratio: 16 / 10;
    margin-bottom: 6px;
  }

  .player-strip {
    margin-top: 8px;
    padding: 10px;
    font-size: 11px;
  }

  .product-preview .player-strip {
    display: none;
  }

  .media-grid,
  .audience-grid,
  .feature-grid,
  .privacy-checks,
  .scenario-row,
  .screen-grid,
  .about-grid,
  .faq-grid,
  .poster-layout,
  .footer-grid {
    grid-template-columns: 1fr;
  }

  .player-strip {
    flex-wrap: wrap;
  }

  .progress {
    flex-basis: 100%;
    order: 3;
  }

  .pain-section,
  #features,
  .product-evidence,
  .download-section,
  .privacy-band,
  .scenarios,
  .faq-section,
  .contact-section {
    padding: 58px 0;
  }

  .audience-card,
  .screen-card,
  .download-qr-card,
  .faq-grid article {
    padding: 18px;
  }

  .download-actions {
    display: grid;
    grid-template-columns: 1fr;
  }

  .download-qr-card {
    justify-self: start;
    width: 100%;
  }

  .phone-frame {
    min-height: 230px;
  }

  .pain-section {
    padding-top: 34px;
  }

  .contact-card {
    padding: 18px;
  }

  .qr-card {
    width: 100%;
  }

  .footer-inner {
    flex-direction: column;
  }

  .page-hero {
    padding: 48px 0 16px;
  }

  .doc-layout,
  .about-grid,
  .poster-layout {
    padding-bottom: 58px;
  }

  .doc-card,
  .poster-actions {
    padding: 18px;
  }

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