:root {
  --bg: #f7f8fa;
  --bg-alt: #eef1f6;
  --surface: #ffffff;
  --border: #dfe3eb;
  --text: #151821;
  --muted: #5c6578;
  --link: #3a4255;
  --link-hover: #151821;
  --primary: #151821;
  --primary-dark: #0f1219;
  --primary-hover: #2a3142;
  --accent: #7a8499;
  --accent-light: #c8d4e8;
  --accent-soft: #e8edf5;
  --accent-highlight: #a3b8d9;
  --hero-from: #151821;
  --hero-to: #1e2430;
  --on-dark: #f4f6fa;
  --on-dark-muted: rgba(244, 246, 250, 0.68);
  --focus-ring: rgba(163, 184, 217, 0.45);
  --radius: 16px;
  --radius-sm: 10px;
  --shadow: 0 12px 40px rgba(21, 24, 33, 0.06);
  --shadow-lg: 0 24px 60px rgba(21, 24, 33, 0.1);
  --max-w: 1200px;
  --header-h: 72px;
  --font: "Inter", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

a { color: var(--link); text-decoration: none; }

.text-underline {
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 0.2em;
  text-decoration-color: currentColor;
}

a.link-underline {
  color: var(--link-hover);
  text-decoration: underline;
  text-decoration-thickness: 2px;
  text-underline-offset: 0.22em;
  text-decoration-color: var(--link-hover);
}

a.link-underline:hover {
  color: var(--primary);
  text-decoration-color: var(--primary);
}
a:hover { color: var(--link-hover); }

.container {
  width: min(var(--max-w), calc(100% - 48px));
  margin-inline: auto;
}

.section {
  padding: 96px 0;
}

.section--alt { background: var(--bg-alt); }

.section--dark {
  background: linear-gradient(135deg, var(--hero-from), var(--hero-to));
  color: #fff;
}

.section-label {
  display: inline-block;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 12px;
}

.section--dark .section-label { color: var(--accent-highlight); }

.section-title {
  font-size: clamp(2rem, 3.5vw, 2.875rem);
  font-weight: 700;
  line-height: 1.25;
  margin: 0 0 16px;
  text-wrap: balance;
}

/* Keep Latin words embedded in Chinese headings on a stable UI sans stack. */
.latin-text {
  font-family: Arial, Helvetica, sans-serif;
  font-variant-ligatures: none;
  font-feature-settings: "liga" 0;
}

.title-cn-nowrap {
  display: inline-block;
  white-space: nowrap;
}

/* Keep English headings on a neutral sans-serif stack so small glyphs such as
   the dot on “i” render consistently across browsers and operating systems. */
html[lang="en"] .section-title,
html[lang="en"] .page-hero h1,
html[lang="en"] .hero__title {
  font-family: Arial, Helvetica, sans-serif;
}

.section-lead {
  font-size: 1.125rem;
  color: var(--muted);
  max-width: 720px;
  margin: 0 0 40px;
  text-wrap: pretty;
}

.section--dark .section-lead { color: rgba(255, 255, 255, 0.82); }

/* Header */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  background: rgba(247, 248, 250, 0.92);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.site-header__inner {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 100%;
}

.site-header__end {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-left: auto;
}

.logo {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.logo:hover { color: var(--text); }

.logo__dot { color: var(--accent-highlight); font-weight: 700; }

.brand-logo img {
  display: block;
  width: auto;
  height: 31px;
}

.site-footer .brand-logo img {
  height: 29px;
}

/* FFDE 5·6·7 methodology co-brand mark */
.method-lockup {
  display: block;
  width: min(700px, 100%);
  height: auto;
  margin: 0 0 24px;
}

.method-lockup-link {
  display: block;
  width: min(700px, 100%);
}

.method-lockup-link:hover { opacity: 0.9; }

.method-lockup--hero {
  margin-left: 0;
  margin-right: 0;
  margin-bottom: 28px;
}

.method-lockup-band {
  padding: 22px 0 20px;
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.method-lockup-band--dark {
  background: rgba(255, 255, 255, 0.04);
  border-top-color: rgba(255, 255, 255, 0.12);
  border-bottom-color: rgba(255, 255, 255, 0.12);
}

.method-lockup-caption {
  margin: 0;
  text-align: center;
  color: var(--muted);
  font-size: 0.875rem;
}

.section--dark .method-lockup-caption { color: var(--on-dark-muted); }

.nav { display: flex; align-items: center; gap: 8px; }

.nav a:not(.btn) {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  padding: 8px 14px;
  border-radius: 999px;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--text);
  text-decoration: none;
}

.nav a:not(.btn):hover {
  background: var(--surface);
  color: var(--link-hover);
}

.nav a:not(.btn).active,
.nav a:not(.btn)[aria-current="page"] {
  background: var(--accent-soft);
  color: var(--text);
  font-weight: 600;
  box-shadow: inset 0 0 0 1px var(--border);
}

.site-header__actions {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-shrink: 0;
}

.lang-switch {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 6px 11px;
  font-size: 0.8125rem;
  font-weight: 600;
  line-height: 1.25;
  white-space: nowrap;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 999px;
  box-shadow: 0 1px 2px rgba(21, 24, 33, 0.05);
}

.lang-switch__sep { color: var(--muted); font-weight: 400; }

.lang-switch__active { color: var(--text); }

.lang-switch__link {
  color: var(--muted);
  font-weight: 600;
}

.lang-switch__link:hover { color: var(--link-hover); }

.site-header__actions .site-header__cta.btn {
  padding: 6px 14px;
  font-size: 0.8125rem;
  line-height: 1.25;
  color: #fff;
  white-space: nowrap;
}

.site-header__cta:hover {
  color: #fff;
}

.nav-toggle {
  display: none;
  margin-left: 2px;
  background: none;
  border: 0;
  padding: 8px;
  cursor: pointer;
  color: var(--link);
  font-size: 1.375rem;
  line-height: 1;
  min-width: 44px;
  min-height: 44px;
  align-items: center;
  justify-content: center;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 999px;
  font-size: 0.9375rem;
  font-weight: 600;
  text-decoration: none;
  border: 2px solid transparent;
  cursor: pointer;
  transition: transform 0.15s, background 0.15s, border-color 0.15s;
}

.btn:hover { transform: translateY(-1px); }
.btn:active { scale: 0.96; }

.btn--primary {
  background: var(--primary);
  color: var(--on-dark);
}

.btn--primary:hover {
  background: var(--primary-hover);
  color: #fff;
}

.hero .btn--primary,
.cta-band .btn--primary {
  background: var(--on-dark);
  color: var(--hero-from);
}

.hero .btn--primary:hover,
.cta-band .btn--primary:hover {
  background: #fff;
  color: var(--hero-from);
}

.btn--outline {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.45);
  color: #fff;
}

.btn--outline:hover {
  background: rgba(255, 255, 255, 0.12);
  color: #fff;
}

.btn--ghost {
  background: var(--accent-soft);
  color: var(--link-hover);
}

.btn--ghost:hover {
  background: #dde4ef;
  color: var(--link-hover);
}

.btn-group { display: flex; flex-wrap: wrap; gap: 12px; }

/* Hero */
.hero {
  padding: 56px 0 48px;
  background: linear-gradient(165deg, var(--hero-from) 0%, #181d28 55%, var(--hero-to) 100%);
  color: var(--on-dark);
  overflow: hidden;
}

.hero__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px 56px;
  align-items: center;
}

.hero__copy {
  max-width: 560px;
}

.hero__title {
  font-size: clamp(1.875rem, 4vw, 2.75rem);
  font-weight: 800;
  line-height: 1.15;
  margin: 0 0 16px;
  text-wrap: balance;
}

.hero__title--paired {
  display: grid;
  grid-template-columns: auto auto;
  column-gap: 0.2em;
  row-gap: 0.14em;
  align-items: baseline;
  width: fit-content;
  max-width: 100%;
  text-wrap: nowrap;
}

.hero__title-lead {
  text-align: start;
  white-space: nowrap;
}

.hero__title-rest {
  white-space: nowrap;
}

.hero__eyebrow {
  display: block;
  margin-bottom: 12px;
  color: var(--accent-highlight);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

html[lang="en"] .hero__eyebrow {
  letter-spacing: 0.04em;
  text-transform: none;
}

.hero__tagline {
  font-size: 1.0625rem;
  color: var(--on-dark-muted);
  margin: 0 0 12px;
  line-height: 1.6;
  text-wrap: pretty;
}

.hero__body {
  font-size: 0.9375rem;
  color: rgba(244, 246, 250, 0.7);
  margin: 0 0 28px;
  text-wrap: pretty;
}

.hero-outcome {
  width: 100%;
  max-width: 460px;
  padding: 28px;
  justify-self: end;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.14);
  border-radius: 24px;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.16);
}

.hero-outcome__label {
  display: block;
  margin-bottom: 18px;
  color: var(--accent-highlight);
  font-size: 1.0625rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.hero-outcome__step {
  display: grid;
  gap: 3px;
  padding: 14px 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.hero-outcome__step strong { color: var(--on-dark); font-size: 1rem; }
.hero-outcome__step span { color: var(--on-dark-muted); font-size: 0.875rem; }

.hero-outcome__result {
  margin: 18px 0 0;
  color: var(--accent-light);
  font-weight: 700;
  text-wrap: balance;
}

.value-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 20px;
}

.value-card {
  grid-column: span 2;
  padding: 26px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.value-card:nth-child(4) { grid-column: 2 / span 2; }
.value-card:nth-child(5) { grid-column: 4 / span 2; }

.value-card__index {
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.value-card h3 { margin: 8px 0 16px; }
.value-card p { margin: 0 0 12px; color: var(--muted); font-size: 0.9375rem; }
.value-card p strong { color: var(--text); }

.value-card__metric {
  padding-top: 14px;
  border-top: 1px solid var(--border);
  color: var(--link-hover) !important;
  font-size: 0.8125rem !important;
  font-weight: 700;
}

.growth-bridge,
.proof-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
}

.growth-bridge article {
  padding: 24px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.growth-bridge article > span,
.proof-strip article > span {
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
}

.growth-bridge h3,
.proof-strip h3 { margin: 10px 0 8px; }
.growth-bridge p { min-height: 3.2em; margin: 0 0 18px; color: var(--muted); }
.growth-bridge strong { color: var(--text); font-size: 0.9375rem; }

.proof-strip article {
  padding: 22px;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.proof-strip article > span { color: var(--accent-highlight); }
.proof-strip h3 { color: var(--on-dark); }
.proof-strip p { margin: 0; color: var(--on-dark-muted); }

.f-wheel {
  text-align: left;
  justify-self: start;
  width: 100%;
  max-width: 420px;
}

.hero-brand-row {
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 12px;
  width: 100%;
  margin: 0 0 24px;
}

.hero-brand-row .f-wheel {
  flex: 0 0 130px;
  max-width: 130px;
  margin: 0;
}

.hero-brand-row .f-wheel__matrix {
  font-size: 1.375rem;
}

.hero-brand-row .f-wheel__ticker--en .f-wheel__ticker-view {
  min-width: 6.8em;
}

.hero-brand-row .f-wheel__ticker--cn {
  font-size: 1.125rem;
}

.hero-brand-row .f-wheel--en {
  flex-basis: 130px;
  max-width: 130px;
  margin-left: 0;
}

.hero-brand-row .f-wheel--en .f-wheel__ticker--cn {
  display: none;
}

.hero-method-link {
  flex: 0 0 190px;
  width: 190px;
  padding: 4px 0 4px 14px;
  border-left: 1px solid rgba(244, 246, 250, 0.18);
  color: var(--on-dark);
}

.hero-method-link strong,
.hero-method-link span {
  display: block;
}

.hero-method-link strong {
  color: var(--accent-light);
  font-size: 1.375rem;
  line-height: 1.2;
}

.hero-method-link span {
  margin-top: 5px;
  color: var(--on-dark-muted);
  font-size: 0.8125rem;
  font-weight: 600;
  line-height: 1.35;
}

.hero-method-link:hover { opacity: 0.86; }

@media (min-width: 1025px) {
  .hero__grid {
    grid-template-columns: 1fr minmax(340px, 440px);
    gap: 48px 72px;
  }

  .f-wheel {
    justify-self: end;
    max-width: 440px;
  }

  .hero__grid:has(.f-wheel--en) {
    grid-template-columns: 1fr minmax(400px, 520px);
  }

  .f-wheel--en {
    justify-self: start;
    max-width: 100%;
    margin-left: -20px;
  }

  .f-wheel--en .f-wheel__ticker--en .f-wheel__ticker-view {
    min-width: 13.5em;
  }

  .f-wheel--en .f-wheel__ticker--cn {
    font-size: clamp(1.35rem, 2.8vw, 1.875rem);
  }

  .site-header__end {
    gap: 4px;
  }

  .nav {
    margin-right: 8px;
  }
}

.f-wheel__matrix {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: end;
  column-gap: 0;
  row-gap: 0;
  width: fit-content;
  max-width: 100%;
  font-family: "Inter", var(--font);
  font-size: clamp(1.75rem, 4.5vw, 2.75rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

.f-wheel__f {
  color: rgba(244, 246, 250, 0.9);
}

.f-wheel__f--accent {
  color: var(--accent-highlight);
}

.f-wheel__brand {
  color: var(--on-dark);
  white-space: nowrap;
}

.f-wheel__tld {
  color: var(--accent-light);
  font-weight: 700;
}

.f-wheel__ticker--cn {
  grid-column: 1 / -1;
  margin-top: 0.2em;
  font-family: "Inter", "Noto Sans SC", "PingFang SC", sans-serif;
  font-size: clamp(1.5rem, 3.2vw, 2.125rem);
  font-weight: 700;
  letter-spacing: 0.01em;
  text-align: left;
}

.f-wheel__ticker-view {
  overflow: hidden;
}

.f-wheel__ticker--en .f-wheel__ticker-view {
  height: 1.2em;
  min-width: 11.5em;
}

.f-wheel__ticker--en .f-wheel__tick {
  height: 1.2em;
  line-height: 1.2em;
  color: rgba(200, 212, 232, 0.88);
}

.f-wheel__ticker--cn .f-wheel__ticker-view {
  height: 1.55em;
}

.f-wheel__ticker--cn .f-wheel__tick {
  height: 1.55em;
  line-height: 1.55em;
  color: rgba(244, 246, 250, 0.82);
}

/* The English brand wheel carries a longer descriptor. Let it wrap instead
   of clipping at the right edge, while keeping a fixed viewport for the
   vertical ticker animation. */
.f-wheel--en .f-wheel__ticker--cn {
  max-width: 100%;
  font-size: clamp(1.15rem, 2.2vw, 1.5rem);
}

.f-wheel--en .f-wheel__ticker--cn .f-wheel__ticker-view {
  height: 2.7em;
  max-width: 100%;
}

.f-wheel--en .f-wheel__ticker--cn .f-wheel__tick {
  height: 2.7em;
  line-height: 1.3;
  white-space: normal;
  overflow-wrap: break-word;
}

.f-wheel__ticker-track {
  display: block;
  will-change: transform;
}

.f-wheel__tick {
  display: block;
  white-space: nowrap;
}

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

.mission-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px 24px;
  box-shadow: var(--shadow);
}

.mission-card__title {
  font-size: 1.125rem;
  font-weight: 700;
  margin: 0 0 8px;
  color: var(--text);
}

.mission-card__map {
  display: block;
  margin: -4px 0 8px;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  opacity: 0.85;
}

.mission-card p { margin: 0; color: var(--muted); font-size: 0.9375rem; }

.f-item__mission {
  display: inline-block;
  margin-bottom: 8px;
  font-size: 0.6875rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
}

/* Cards grid */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: var(--shadow);
  transition: transform 0.2s, box-shadow 0.2s;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.card__icon {
  width: 44px;
  height: 44px;
  border-radius: 12px;
  background: var(--accent-soft);
  color: var(--link-hover);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.card h3 {
  font-size: 1.125rem;
  margin: 0 0 10px;
}

.card p { margin: 0; color: var(--muted); font-size: 0.9375rem; }

/* Two column */
.two-col {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.prose h3 { font-size: 1.25rem; margin: 0 0 12px; }

.prose p { color: var(--muted); margin: 0 0 16px; }

.prose ul {
  margin: 0 0 16px;
  padding-left: 20px;
  color: var(--muted);
}

.prose li { margin-bottom: 8px; }

/* Table */
.table-wrap {
  overflow-x: auto;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  background: var(--surface);
  box-shadow: var(--shadow);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9375rem;
}

th, td {
  padding: 14px 18px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

th {
  background: var(--bg-alt);
  font-weight: 600;
  white-space: nowrap;
}

tr:last-child td { border-bottom: 0; }

td strong { color: var(--link-hover); }

/* Pain carousel */
.pain-carousel {
  background: var(--hero-to);
  padding: 32px 0 36px;
}

.pain-carousel__inner { position: relative; }

.pain-slide {
  display: none;
  text-align: center;
  max-width: 720px;
  margin: 0 auto;
  padding: 0 24px;
}

.pain-slide.active { display: block; }

.pain-slide p {
  font-size: clamp(1rem, 2.2vw, 1.375rem);
  font-weight: 500;
  line-height: 1.55;
  margin: 0;
  color: var(--on-dark-muted);
}

.pain-slide strong {
  color: var(--accent-light);
  font-weight: 600;
}

.pain-dots {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 24px;
}

.pain-dot {
  position: relative;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 0;
  background: transparent;
  cursor: pointer;
  padding: 0;
}

.pain-dot::after {
  content: "";
  position: absolute;
  top: 50%;
  left: 50%;
  width: 10px;
  height: 10px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.22);
  translate: -50% -50%;
  transition: width 150ms ease-out, background-color 150ms ease-out;
}

.pain-dot.active::after { width: 28px; background: var(--accent-light); }

/* Pillars */
.pillar-strip {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
}

.pillar {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px 20px;
  position: relative;
}

.pillar__num {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.05em;
  margin-bottom: 8px;
}

.pillar h3 {
  font-size: 1rem;
  margin: 0 0 8px;
}

.pillar p {
  font-size: 0.8125rem;
  color: var(--muted);
  margin: 0 0 12px;
}

.pillar__deliverables {
  font-size: 0.75rem;
  color: var(--accent);
  font-weight: 500;
  line-height: 1.4;
}

/* Trust bar */
.trust-bar {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 24px;
  text-align: center;
  padding: 48px 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.trust-bar__num {
  font-size: 2rem;
  font-weight: 800;
  color: var(--text);
  line-height: 1;
}

.trust-bar__label {
  font-size: 0.875rem;
  color: var(--muted);
  margin-top: 8px;
}

/* CTA band */
.cta-band {
  background: linear-gradient(165deg, var(--hero-from), var(--hero-to));
  color: var(--on-dark);
  text-align: center;
  padding: 80px 24px;
}

.cta-band h2 {
  font-size: clamp(1.5rem, 3vw, 2.25rem);
  margin: 0 0 16px;
}

.cta-band p {
  font-size: 1.125rem;
  color: var(--on-dark-muted);
  max-width: 560px;
  margin: 0 auto 32px;
}

/* Footer */
.site-footer {
  background: var(--hero-from);
  color: rgba(255, 255, 255, 0.72);
  padding: 64px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-grid h4 {
  color: #fff;
  font-size: 0.875rem;
  font-weight: 600;
  margin: 0 0 16px;
}

.footer-grid a {
  display: block;
  color: rgba(255, 255, 255, 0.65);
  font-size: 0.875rem;
  margin-bottom: 10px;
  text-decoration: none;
}

.footer-grid a:hover { color: #fff; }

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.8125rem;
}

.footer-icp {
  flex-basis: 100%;
  color: rgba(255, 255, 255, 0.96);
  font-weight: 600;
  text-align: center;
  text-decoration: none;
}

.footer-icp + .footer-icp {
  margin-top: -6px;
}

.footer-icp:hover {
  color: #fff;
  text-decoration: underline;
}

/* Page hero (inner pages) */
.page-hero {
  padding: 56px 0 40px;
  background: linear-gradient(165deg, var(--hero-from), var(--hero-to));
  color: var(--on-dark);
}

.page-hero h1 {
  font-size: clamp(1.75rem, 3.5vw, 2.75rem);
  margin: 0 0 16px;
}

.page-hero p {
  font-size: 1.125rem;
  color: var(--on-dark-muted);
  max-width: 640px;
  margin: 0;
}

/* Form */
.contact-form {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 40px;
  box-shadow: var(--shadow);
}

.form-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.form-group { display: flex; flex-direction: column; gap: 6px; }

.form-group--full { grid-column: 1 / -1; }

.form-group label {
  font-size: 0.875rem;
  font-weight: 600;
}

.form-group input,
.form-group select,
.form-group textarea {
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font: inherit;
  font-size: 0.9375rem;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: 2px solid var(--focus-ring);
  border-color: var(--primary);
}

.form-checkboxes {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 8px;
}

.form-checkboxes label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 400;
  font-size: 0.875rem;
  cursor: pointer;
}

.form-success {
  display: none;
  padding: 16px;
  background: #ecfdf5;
  border: 1px solid #86efac;
  border-radius: var(--radius-sm);
  color: #15803d;
  margin-bottom: 20px;
}

.form-success.visible { display: block; }

/* F-grid (about page) */
.f-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}

.f-item {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 20px;
}

.f-item__en {
  font-weight: 700;
  color: var(--text);
  font-size: 0.9375rem;
}

.f-item__cn {
  font-size: 0.8125rem;
  color: var(--muted);
  margin-top: 4px;
}

.f-item p {
  font-size: 0.8125rem;
  color: var(--muted);
  margin: 8px 0 0;
}

/* Timeline */
.timeline {
  display: grid;
  gap: 12px;
}

.timeline-item {
  display: grid;
  grid-template-columns: 80px 1fr auto;
  gap: 16px;
  align-items: center;
  padding: 16px 20px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.9375rem;
}

.timeline-item__day {
  font-weight: 700;
  color: var(--text);
}

.timeline-item__pillar {
  font-size: 0.8125rem;
  color: var(--accent);
  white-space: nowrap;
}

/* Legal */
.legal-content {
  max-width: 800px;
  margin: 0 auto;
}

.legal-content h2 {
  font-size: 1.25rem;
  margin: 32px 0 12px;
}

.legal-content p,
.legal-content li {
  color: var(--muted);
  font-size: 0.9375rem;
}

/* Responsive */
@media (max-width: 1024px) {
  .hero__grid { grid-template-columns: 1fr; }
  .f-wheel { max-width: none; margin-top: 8px; }
  .f-wheel--en {
    margin-left: -8px;
    margin-right: 8px;
  }

  .f-wheel--en .f-wheel__ticker--cn {
    font-size: clamp(1.1rem, 4.2vw, 1.5rem);
  }

  .f-wheel--en .f-wheel__ticker--cn .f-wheel__ticker-view,
  .f-wheel--en .f-wheel__ticker--cn .f-wheel__tick {
    height: 4em;
  }

  .f-wheel__matrix {
    font-size: clamp(1.875rem, 6.5vw, 2.75rem);
  }

  .f-wheel__ticker--cn {
    font-size: clamp(1.625rem, 5.5vw, 2.125rem);
  }
  .mission-grid { grid-template-columns: repeat(2, 1fr); }
  .pillar-strip { grid-template-columns: repeat(2, 1fr); }
  .trust-bar { grid-template-columns: repeat(3, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .f-grid { grid-template-columns: repeat(2, 1fr); }
  .two-col { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .section { padding: 64px 0; }

  .site-header__actions .site-header__cta.btn {
    padding: 6px 12px;
    font-size: 0.75rem;
  }

  .lang-switch {
    padding: 5px 9px;
    font-size: 0.75rem;
  }

  .site-header__actions {
    gap: 6px;
  }

  .nav {
    display: none;
    position: absolute;
    top: var(--header-h);
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 16px;
    box-shadow: var(--shadow);
  }

  .nav.open { display: flex; }

  .nav-toggle {
    display: inline-flex;
    font-size: 1.75rem;
    padding: 4px 8px;
    min-width: 48px;
    min-height: 48px;
  }

  .site-header__inner { position: relative; }

  .mission-grid { grid-template-columns: 1fr; }
  .pillar-strip { grid-template-columns: 1fr; }
  .trust-bar { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr; }
  .form-grid { grid-template-columns: 1fr; }
  .form-checkboxes { grid-template-columns: 1fr; }
  .f-grid { grid-template-columns: 1fr; }
  .timeline-item { grid-template-columns: 1fr; gap: 4px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .f-wheel__ticker-track { transition: none !important; }
  .card:hover { transform: none; }
  .btn:hover { transform: none; }
}

/* KB + FAQ (LLMO Phase B) */
.kb-conclusion {
  font-size: 1.125rem;
  line-height: 1.65;
  color: var(--on-dark-muted);
  max-width: 720px;
  margin: 0;
}

.section .kb-conclusion { color: var(--muted); }

.kb-index-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 32px 40px;
}

.kb-index-grid > .kb-filter-bar {
  grid-column: 1 / -1;
  width: 100%;
}

.kb-index-list {
  margin: 0;
  padding-left: 1.25rem;
  color: var(--muted);
}

.kb-index-list li { margin-bottom: 10px; }

.kb-index-list a { color: var(--text); font-weight: 500; }

.kb-steps { padding-left: 1.25rem; color: var(--muted); }

.kb-steps li { margin-bottom: 8px; }

.kb-related a { font-weight: 500; }

/* Visual system components */
:focus-visible {
  outline: 3px solid var(--focus-ring);
  outline-offset: 3px;
}

.visual-frame {
  margin: 32px 0 0;
  padding: 18px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.visual-frame--flush {
  padding: 0;
  overflow: hidden;
}

.visual-frame__image {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 16 / 9;
  object-fit: contain;
  background: var(--bg);
}

.visual-caption {
  margin: 12px 4px 0;
  color: var(--muted);
  font-size: 0.8125rem;
  line-height: 1.55;
}

.visual-frame--flush .visual-caption { margin: 12px 18px 18px; }

.icon-tile {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  width: 48px;
  height: 48px;
  padding: 8px;
  background: var(--accent-soft);
  border-radius: 14px;
}

.icon-tile img { width: 100%; height: 100%; object-fit: contain; }
.icon-tile--sm { width: 36px; height: 36px; padding: 6px; border-radius: 10px; }
.icon-tile--lg { width: 60px; height: 60px; padding: 10px; border-radius: 18px; }

.card--visual,
.card--service,
.card--question,
.card--evidence {
  display: flex;
  flex-direction: column;
}

.card__topline {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.card__eyebrow {
  color: var(--accent);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.card__link { margin-top: auto; padding-top: 18px; font-weight: 600; }

.process-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 12px;
  margin-top: 28px;
}

.process-strip__item {
  padding: 16px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.process-strip__num { color: var(--accent); font-weight: 700; font-size: 0.8125rem; }
.process-strip__title { margin: 8px 0 0; font-weight: 700; }
.process-strip__text { margin: 6px 0 0; color: var(--muted); font-size: 0.875rem; }

.section-nav {
  position: sticky;
  top: var(--header-h);
  z-index: 20;
  display: flex;
  gap: 8px;
  overflow-x: auto;
  padding: 10px 0;
  background: rgba(247, 248, 250, 0.94);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
}

.section-nav a {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  flex: 0 0 auto;
  padding: 7px 12px;
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.8125rem;
  font-weight: 600;
  white-space: nowrap;
}

.section-nav a:hover,
.section-nav a.active { background: var(--accent-soft); color: var(--text); }

.scroll-cue {
  display: none;
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 0.75rem;
  text-align: right;
}

.visual-stack { display: grid; gap: 18px; margin-top: 28px; }

.visual-stack__item {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: center;
  gap: 14px;
  padding: 18px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.visual-stack__item h3 { margin: 0; font-size: 1rem; }
.visual-stack__item p { margin: 4px 0 0; color: var(--muted); font-size: 0.875rem; }

.pain-carousel__controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 12px;
}

.pain-control {
  min-width: 44px;
  min-height: 44px;
  padding: 4px 9px;
  border: 1px solid rgba(244, 246, 250, 0.28);
  border-radius: 999px;
  background: transparent;
  color: var(--on-dark);
  cursor: pointer;
  font: inherit;
  font-size: 0.8125rem;
}

.pain-control:hover { background: rgba(255,255,255,0.1); }
.kb-category {
  position: relative;
  padding: 22px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.kb-category__heading {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.kb-category__heading .section-title { margin: 0; }

.kb-filter-bar {
  display: grid;
  grid-template-columns: repeat(7, minmax(0, 1fr));
  align-items: center;
  gap: 4px;
  max-width: 100%;
  padding: 5px;
  margin: 20px 0 28px;
  background: var(--accent-soft);
  border: 1px solid var(--border);
  border-radius: 14px;
}

.kb-filter {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  min-height: 44px;
  padding: 8px 14px;
  border: 1px solid transparent;
  border-radius: 9px;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font: inherit;
  font-size: 0.8125rem;
  line-height: 1.25;
  white-space: nowrap;
  transition: color 0.15s, background 0.15s, border-color 0.15s, box-shadow 0.15s;
}

.kb-filter:hover,
.kb-filter.active {
  background: var(--primary);
  border-color: var(--primary);
  color: var(--on-dark);
  box-shadow: none;
}

.kb-filter:hover:not(.active) { background: var(--accent-soft); color: var(--text); }

.service-card p { margin-bottom: 10px; }
.service-card p:last-child { margin-bottom: 0; }
.service-card strong { color: var(--text); }

.kb-category[data-hidden="true"] { display: none; }

@media (max-width: 768px) {
  .kb-index-grid { grid-template-columns: 1fr; gap: 24px; }
  .kb-index-grid > .kb-filter-bar { grid-column: 1; }
  .process-strip { grid-template-columns: 1fr 1fr; }
  .hero-outcome { justify-self: stretch; max-width: none; padding: 22px; }
  .value-grid { grid-template-columns: 1fr; }
  .value-card,
  .value-card:nth-child(4),
  .value-card:nth-child(5) { grid-column: 1; }
  .growth-bridge,
  .proof-strip { grid-template-columns: 1fr; }
  .growth-bridge p { min-height: 0; }
  .section-nav { margin-inline: -24px; padding-inline: 24px; }
  .visual-frame { margin-top: 24px; padding: 10px; }
  .visual-frame--flush { padding: 0; }
  .visual-frame { overflow-x: auto; }
  .visual-frame__image { width: 640px; max-width: none; aspect-ratio: auto; min-height: 0; object-fit: contain; }
  .visual-caption { min-width: 0; }
  .visual-caption::before { content: "左右滑动查看 · "; font-weight: 700; color: var(--accent); }
  html[lang="en"] .visual-caption::before { content: "Swipe horizontally · "; }
  .scroll-cue { display: block; }
  .visual-stack__item { align-items: flex-start; }
  .kb-filter-bar {
    display: grid;
    grid-template-columns: repeat(7, minmax(112px, 1fr));
    overflow-x: auto;
    margin-inline: -4px;
    padding-inline: 5px;
    scrollbar-width: none;
  }
  .kb-filter-bar::-webkit-scrollbar { display: none; }
}

@media (max-width: 480px) {
  .process-strip { grid-template-columns: 1fr; }
  .pain-carousel__controls { gap: 4px; }
  .pain-dots { display: none; }
}

.faq-list { margin: 0; }

.faq-list dt {
  font-weight: 600;
  margin-top: 1.25rem;
  color: var(--text);
}

.faq-list dt:first-child { margin-top: 0; }

.faq-list dd {
  margin: 0.35rem 0 0;
  color: var(--muted);
  line-height: 1.65;
}