:root {
  color-scheme: light;
  --ink: #1d1e2c;
  --ink-2: #36344d;
  --navy: #2f1c6a;
  --body: #4f4d61;
  --muted: #727586;
  --line: #d5d8e2;
  --line-soft: #ebedf3;
  --purple: #673de6;
  --purple-dark: #5025d1;
  --purple-deep: #2f1c6a;
  --purple-tint: #f2f0fe;
  --purple-tint-2: #ebe4ff;
  --gold: #c79c52;
  --gold-2: #a87b2f;
  --teal: #00b090;
  --red: #fc5185;
  --shadow: 0 6px 30px rgba(47, 28, 106, 0.08);
  --shadow-hover: 0 16px 48px rgba(47, 28, 106, 0.16);
  --radius: 16px;
  --radius-sm: 8px;
  --max: 1160px;
  --sans: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", sans-serif;
  --serif-cn: "Noto Serif SC", "Songti SC", STSong, "SimSun", serif;
  font-family: var(--sans);
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--body);
  background: #fff;
  line-height: 1.65;
}

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

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  border-bottom: 1px solid var(--line-soft);
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(14px);
}

.nav {
  width: min(var(--max), calc(100% - 32px));
  min-height: 72px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: var(--navy);
  font-family: "Cormorant Garamond", Georgia, serif;
  font-size: 1.35rem;
  font-weight: 700;
  letter-spacing: 0;
}

.brand-mark {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  color: #fff;
  background: linear-gradient(135deg, var(--purple), var(--purple-dark));
  box-shadow: 0 6px 18px rgba(103, 61, 230, 0.32);
  font-family: var(--serif-cn);
  font-size: 1.05rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 22px;
  color: var(--ink-2);
  font-size: 0.94rem;
  font-weight: 600;
}

.nav-links a {
  padding: 10px 0;
}

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

.button {
  border: 2px solid var(--purple);
  border-radius: var(--radius-sm);
  min-height: 46px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 0 22px;
  color: #fff;
  background: var(--purple);
  font-weight: 700;
  font-size: 0.97rem;
  cursor: pointer;
  transition: background 0.16s ease, border-color 0.16s ease, color 0.16s ease, transform 0.16s ease;
}

.button:hover {
  background: var(--purple-dark);
  border-color: var(--purple-dark);
}

.nav-cta {
  min-height: auto;
  border: 0;
  border-radius: 0;
  padding: 10px 0;
  display: inline-flex;
  align-items: center;
  background: transparent;
  color: var(--purple);
  font-weight: 700;
  box-shadow: none;
}

.nav-cta:hover {
  background: transparent;
  color: var(--purple-dark);
}

.language-menu {
  position: relative;
  display: inline-flex;
  align-items: center;
}

.language-trigger {
  min-height: 38px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  border: 0;
  padding: 0 4px;
  background: transparent;
  color: var(--ink-2);
  font: inherit;
  font-weight: 800;
  cursor: pointer;
}

.language-trigger:hover,
.language-menu.is-open .language-trigger {
  color: var(--purple);
}

.language-flag {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  display: inline-grid;
  place-items: center;
  flex: 0 0 auto;
  overflow: hidden;
  border: 1px solid var(--line);
  background: var(--purple-tint);
  color: var(--navy);
  font-size: 0.56rem;
  font-weight: 900;
  letter-spacing: 0;
}

.language-flag-cn {
  background:
    radial-gradient(circle at 68% 34%, #f5d56d 0 2px, transparent 2.5px),
    linear-gradient(135deg, #de2910 0%, #b51d14 100%);
  color: #ffe278;
}

.language-flag-us {
  background: linear-gradient(180deg, #3c3b6e 0 34%, #fff 34% 45%, #b22234 45% 56%, #fff 56% 67%, #b22234 67% 78%, #fff 78% 89%, #b22234 89%);
  color: #fff;
}

.language-panel {
  position: absolute;
  top: calc(100% + 16px);
  right: 0;
  z-index: 50;
  width: min(360px, calc(100vw - 32px));
  display: none;
  padding: 18px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
  background: #fff;
  color: var(--ink);
  box-shadow: var(--shadow-hover);
}

.language-menu.is-open .language-panel {
  display: block;
}

.language-title {
  color: var(--ink);
  font-size: 0.98rem;
  font-weight: 900;
}

.language-search {
  min-height: 42px;
  margin: 14px 0 10px;
  padding: 0 12px;
  display: flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  color: var(--muted);
  background: #fff;
}

.language-search input {
  width: 100%;
  border: 0;
  outline: 0;
  background: transparent;
  color: var(--ink);
  font: inherit;
}

.language-option {
  width: 100%;
  min-height: 44px;
  display: flex;
  align-items: center;
  gap: 12px;
  border: 0;
  border-radius: 6px;
  padding: 8px;
  background: transparent;
  color: var(--ink);
  font: inherit;
  text-align: left;
}

.language-option:hover,
.language-option.is-current {
  background: var(--purple-tint);
}

.language-option:disabled {
  cursor: not-allowed;
  opacity: 0.58;
}

.language-option strong,
.language-option em {
  display: inline;
}

.language-option strong {
  margin-right: 7px;
  font-size: 0.92rem;
}

.language-option em {
  color: var(--muted);
  font-size: 0.86rem;
  font-style: normal;
}

.button.secondary {
  color: var(--purple);
  background: #fff;
  border-color: var(--purple);
}

.button.secondary:hover {
  color: var(--purple-dark);
  background: var(--purple-tint);
  border-color: var(--purple-dark);
}

.button.ghost {
  color: var(--purple);
  background: transparent;
  border-color: transparent;
  padding-inline: 0;
  box-shadow: none;
}

.button.ghost:hover {
  color: var(--purple-dark);
  background: transparent;
}

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #fff;
  color: var(--ink-2);
  font-size: 1.35rem;
}

/* Hero: deep-purple conversion band (Hostinger-style), photo blended at right. */
.hero {
  position: relative;
  display: grid;
  align-items: center;
  overflow: hidden;
  color: #fff;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -2;
  background:
    linear-gradient(90deg, rgba(47, 28, 106, 0.94) 0%, rgba(64, 36, 150, 0.82) 46%, rgba(103, 61, 230, 0.48) 100%),
    var(--hero-image, linear-gradient(135deg, #2f1c6a, #5025d1)) center / cover no-repeat;
  background-color: #3a2196;
}

.hero::after {
  content: "";
  position: absolute;
  inset: auto 0 0 0;
  height: 8vh;
  z-index: -1;
  background: linear-gradient(180deg, transparent, rgba(24, 10, 62, 0.5));
}

.hero-inner,
.section-inner {
  width: min(var(--max), calc(100% - 32px));
  margin: 0 auto;
}

.hero-content {
  max-width: 780px;
  padding: 84px 0 88px;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  color: var(--purple);
  text-transform: uppercase;
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.12em;
}

.eyebrow::before {
  content: "";
  width: 34px;
  height: 2px;
  border-radius: 2px;
  background: currentColor;
}

.hero .eyebrow {
  color: #cdbcff;
}

h1,
h2,
h3 {
  margin: 0;
  color: var(--navy);
  line-height: 1.12;
  font-family: var(--sans);
  font-weight: 800;
  letter-spacing: -0.015em;
}

.hero h1,
.hero h2,
.hero h3,
.hero-subtitle {
  color: #fff;
}

h1 {
  margin-top: 22px;
  font-size: clamp(2.7rem, 6.5vw, 4.6rem);
}

.hero h1 {
  letter-spacing: -0.02em;
}

.hero-subtitle {
  margin: 18px 0 0;
  max-width: 680px;
  color: rgba(255, 255, 255, 0.92);
  font-size: clamp(1.12rem, 2vw, 1.4rem);
}

.zh-line {
  margin-top: 10px;
  color: #cdbcff;
  font-size: 1.02rem;
}

.hero-actions {
  margin-top: 34px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
}

.hero .button {
  background: var(--purple);
  border-color: transparent;
}

.hero .button:hover {
  background: var(--purple-dark);
}

.hero .button.secondary {
  color: #fff;
  background: transparent;
  border-color: rgba(255, 255, 255, 0.7);
}

.hero .button.secondary:hover {
  background: rgba(255, 255, 255, 0.12);
}

.hero .button.ghost {
  color: #cdbcff;
  border-color: transparent;
  background: transparent;
}

.hero-proof {
  margin-top: 44px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  border-top: 1px solid rgba(255, 255, 255, 0.24);
  border-bottom: 1px solid rgba(255, 255, 255, 0.16);
}

.proof-item {
  padding: 18px 22px 18px 0;
}

.proof-item + .proof-item {
  border-left: 1px solid rgba(255, 255, 255, 0.18);
  padding-left: 22px;
}

.proof-item strong {
  display: block;
  color: #fff;
  font-size: 0.95rem;
}

.proof-item span {
  display: block;
  margin-top: 4px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 0.88rem;
}

main section,
.page-shell {
  padding: 84px 0;
}

.page-shell {
  min-height: 72vh;
}

.section-heading {
  display: grid;
  grid-template-columns: minmax(0, 0.82fr) minmax(280px, 0.48fr);
  gap: 48px;
  align-items: end;
  margin-bottom: 38px;
}

.section-heading h2,
.page-title h1 {
  font-size: clamp(1.9rem, 4vw, 2.9rem);
}

.section-heading p,
.page-title p,
.lead {
  color: var(--body);
  font-size: 1.06rem;
}

.page-title {
  padding: 64px 0 36px;
  border-bottom: 1px solid var(--line-soft);
}

.page-title h1 {
  max-width: 900px;
  margin-top: 18px;
}

.page-title p {
  max-width: 760px;
}

.cards,
.article-grid,
.roadmap-grid,
.feature-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}

.card,
.article-card,
.feature,
.quote-panel,
.newsletter-panel,
.content-panel {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  box-shadow: none;
  transition: box-shadow 0.18s ease, transform 0.18s ease, border-color 0.18s ease;
}

.card,
.article-card,
.feature,
.content-panel {
  padding: 28px;
}

.card:hover,
.article-card:hover,
.feature:hover {
  border-color: rgba(103, 61, 230, 0.45);
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}

.card {
  min-height: 280px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.card-kicker,
.meta {
  color: var(--purple);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 0.11em;
}

.card h3,
.article-card h3,
.feature h3 {
  margin-top: 14px;
  font-size: 1.32rem;
}

.card p,
.article-card p,
.feature p,
.content-panel p,
.content-panel li {
  color: var(--body);
}

.card-link,
.text-link {
  color: var(--purple);
  font-weight: 800;
}

.card-link:hover,
.text-link:hover {
  color: var(--purple-dark);
}

.band {
  background: var(--purple-tint);
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
}

.concept-map {
  display: grid;
  gap: 8px;
}

.concept-heading {
  align-items: start;
}

.concept-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}

.concept-item {
  min-height: 160px;
  padding: 26px;
  display: grid;
  align-content: start;
  gap: 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  transition: box-shadow 0.18s ease, transform 0.18s ease, border-color 0.18s ease;
}

.concept-item:hover {
  border-color: rgba(103, 61, 230, 0.45);
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}

.concept-item span {
  color: var(--purple);
  font-size: 0.75rem;
  font-weight: 900;
}

.concept-item strong {
  color: var(--navy);
  font-family: var(--serif-cn);
  font-size: 1.55rem;
  font-weight: 700;
}

.concept-item em {
  color: var(--body);
  font-style: normal;
}

.matrix {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 20px;
  align-items: stretch;
}

.quote-panel {
  padding: 40px;
  display: grid;
  align-content: center;
  min-height: 100%;
  border: 0;
  background: linear-gradient(135deg, var(--purple-deep), #4a2bb8);
  color: #fff;
}

.quote-panel blockquote {
  margin: 0;
  color: #fff;
  font-family: var(--serif-cn);
  font-size: clamp(1.5rem, 3vw, 2.4rem);
  font-weight: 600;
  line-height: 1.35;
}

.quote-panel cite {
  margin-top: 22px;
  color: #cdbcff;
  font-style: normal;
}

.feature-grid {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.feature {
  min-height: 180px;
}

.article-card {
  min-height: 230px;
}

.article-card a {
  display: block;
  height: 100%;
}

.newsletter-panel {
  padding: 48px;
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(280px, 0.6fr);
  gap: 28px;
  align-items: center;
  border: 0;
  background: linear-gradient(120deg, var(--purple-deep) 0%, #4a2bb8 70%, #5d35d9 100%);
  color: rgba(255, 255, 255, 0.88);
}

.newsletter-panel h1,
.newsletter-panel h2 {
  color: #fff;
  font-size: clamp(1.8rem, 4vw, 2.7rem);
}

.newsletter-panel .eyebrow {
  color: #cdbcff;
}

.newsletter-panel p,
.newsletter-panel .lead {
  color: rgba(255, 255, 255, 0.88);
}

/* CTA inside the purple conversion bands must be a high-contrast white button,
   not purple-on-purple (Hostinger pattern). Covers homepage 周信 + /pricing/ waitlist. */
.newsletter-panel .button {
  background: #fff;
  border-color: #fff;
  color: var(--purple-deep);
}

.newsletter-panel .button:hover {
  background: var(--purple-tint);
  border-color: var(--purple-tint);
  color: var(--purple-dark);
}

.signup {
  display: grid;
  gap: 10px;
}

.signup label {
  font-weight: 700;
}

.signup input {
  width: 100%;
  min-height: 48px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #fff;
  color: var(--ink);
  padding: 0 14px;
  font: inherit;
}

.signup small {
  color: rgba(255, 255, 255, 0.78);
}

/* Signup forms placed on white sections (e.g. pricing waitlist) */
.signup.on-light small {
  color: var(--muted);
}

.two-col {
  display: grid;
  grid-template-columns: minmax(0, 0.74fr) minmax(280px, 0.42fr);
  gap: 28px;
}

.content-panel h2,
.content-panel h3 {
  margin: 20px 0 10px;
}

.content-panel h2:first-child,
.content-panel h3:first-child {
  margin-top: 0;
}

.content-panel ul,
.content-panel ol {
  padding-left: 20px;
}

.roadmap-grid {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.roadmap-item {
  min-height: 150px;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.roadmap-item strong {
  color: var(--purple);
}

.site-footer {
  padding: 46px 0;
  border-top: 1px solid var(--line-soft);
  background: #fafafc;
  color: var(--muted);
}

.footer-inner {
  width: min(var(--max), calc(100% - 32px));
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}

.footer-links {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
  font-weight: 600;
}

.footer-links a:hover {
  color: var(--purple);
}

.article-body {
  max-width: 740px;
  color: var(--ink-2);
}

.article-layout {
  max-width: 980px;
}

.article-title h1 {
  font-size: clamp(1.9rem, 4.4vw, 3rem);
}

.zh-article {
  font-family: var(--serif-cn);
  letter-spacing: 0.01em;
}

.article-body p,
.article-body li {
  color: var(--ink-2);
  font-size: 1.08rem;
  line-height: 2;
}

.article-body p {
  margin: 1.05em 0;
}

.article-body h2 {
  margin-top: 54px;
  font-size: clamp(1.5rem, 3.2vw, 2.1rem);
}

.article-body h3 {
  margin-top: 40px;
  font-size: clamp(1.25rem, 2.6vw, 1.6rem);
}

.zh-article h1,
.zh-article h2,
.zh-article h3,
.article-title h1 {
  font-family: var(--serif-cn);
  font-weight: 700;
  letter-spacing: 0.01em;
}

.article-body blockquote {
  margin: 36px 0;
  padding: 22px 28px;
  border-left: 4px solid var(--purple);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  background: var(--purple-tint);
  color: var(--ink-2);
  font-family: var(--serif-cn);
}

.article-body hr {
  border: 0;
  border-top: 1px solid var(--line-soft);
  margin: 36px 0;
}

.article-nav {
  max-width: 740px;
  margin-top: 38px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
}

.methodology-intro {
  padding: 34px 0 18px;
}

.methodology-grid {
  margin-top: 10px;
}

.math-block {
  overflow-x: auto;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #fafafc;
  color: var(--ink-2);
}

.table-wrap {
  overflow-x: auto;
  margin: 24px 0;
}

.table-wrap table {
  width: 100%;
  border-collapse: collapse;
  color: var(--ink-2);
}

.table-wrap th,
.table-wrap td {
  border: 1px solid var(--line);
  padding: 10px 12px;
  text-align: left;
  vertical-align: top;
}

.table-wrap th {
  color: var(--navy);
  background: var(--purple-tint);
}

.note {
  border-left: 4px solid var(--gold);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  padding: 16px 18px;
  background: #fdf8ee;
  color: var(--ink-2);
}

/* ---------- Pricing (会员与服务, added 2026-06-13) ---------- */

.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
  align-items: stretch;
}

.pricing-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0;
  padding: 32px 28px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
  transition: box-shadow 0.18s ease, transform 0.18s ease, border-color 0.18s ease;
}

.pricing-card:hover {
  box-shadow: var(--shadow-hover);
  transform: translateY(-3px);
}

.pricing-card.is-featured {
  border: 2px solid var(--purple);
  box-shadow: var(--shadow);
}

.pricing-badge {
  position: absolute;
  top: -14px;
  left: 50%;
  transform: translateX(-50%);
  white-space: nowrap;
  padding: 4px 14px;
  border-radius: 999px;
  background: var(--purple);
  color: #fff;
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.04em;
}

.pricing-card h3 {
  font-size: 1.3rem;
}

.pricing-tagline {
  margin: 8px 0 0;
  min-height: 48px;
  color: var(--body);
  font-size: 0.95rem;
}

.price {
  margin-top: 18px;
  color: var(--navy);
  font-size: 2.4rem;
  font-weight: 800;
  letter-spacing: -0.02em;
}

.price small {
  margin-left: 4px;
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0;
}

.price-note {
  margin: 4px 0 0;
  color: var(--muted);
  font-size: 0.85rem;
}

.pricing-features {
  margin: 20px 0 26px;
  padding: 20px 0 0;
  border-top: 1px solid var(--line-soft);
  list-style: none;
  display: grid;
  gap: 11px;
  flex: 1;
}

.pricing-features li {
  position: relative;
  padding-left: 26px;
  color: var(--ink-2);
  font-size: 0.95rem;
}

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

.pricing-features li.is-soon::before {
  content: "◷";
  color: var(--muted);
}

.pricing-card .button {
  width: 100%;
}

.ladder {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  counter-reset: ladder;
}

.ladder-step {
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.ladder-step::before {
  counter-increment: ladder;
  content: "0" counter(ladder);
  display: block;
  color: var(--purple);
  font-size: 0.78rem;
  font-weight: 900;
  letter-spacing: 0.1em;
}

.ladder-step strong {
  display: block;
  margin-top: 8px;
  color: var(--navy);
  font-size: 1.05rem;
}

.ladder-step span {
  display: block;
  margin-top: 6px;
  color: var(--body);
  font-size: 0.9rem;
}

.faq-list {
  max-width: 820px;
  display: grid;
  gap: 12px;
}

.faq-list details {
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #fff;
  padding: 0 20px;
}

.faq-list details[open] {
  border-color: rgba(103, 61, 230, 0.45);
}

.faq-list summary {
  padding: 18px 0;
  cursor: pointer;
  color: var(--navy);
  font-weight: 700;
  list-style: none;
  position: relative;
  padding-right: 30px;
}

.faq-list summary::-webkit-details-marker {
  display: none;
}

.faq-list summary::after {
  content: "+";
  position: absolute;
  right: 2px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--purple);
  font-size: 1.3rem;
  font-weight: 800;
}

.faq-list details[open] summary::after {
  content: "−";
}

.faq-list details p {
  margin: 0 0 18px;
  color: var(--body);
}

/* ---------- Trust strip / honest social proof (added 2026-06-13) ---------- */

.trust-strip {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  margin: 8px 0 0;
  padding: 26px 0 0;
  border-top: 1px solid var(--line-soft);
}

.trust-item {
  text-align: center;
}

.trust-item strong {
  display: block;
  color: var(--navy);
  font-size: clamp(1.7rem, 3.6vw, 2.4rem);
  font-weight: 800;
  letter-spacing: -0.02em;
}

.trust-item span {
  display: block;
  margin-top: 4px;
  color: var(--muted);
  font-size: 0.9rem;
}

/* Trust strip placed on the purple hero reads in light ink. */
.hero .trust-strip {
  border-top-color: rgba(255, 255, 255, 0.2);
}

.hero .trust-item strong {
  color: #fff;
}

.hero .trust-item span {
  color: rgba(255, 255, 255, 0.74);
}

/* ---------- Payment options (added 2026-06-13) ---------- */

.pay-block {
  margin-top: 22px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: #fff;
}

.pay-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  margin-top: 16px;
}

.pay-method {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 12px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #fafafc;
}

.pay-method h4 {
  margin: 0;
  color: var(--navy);
  font-size: 1.02rem;
  font-weight: 700;
}

.pay-method p {
  margin: 0;
  color: var(--muted);
  font-size: 0.85rem;
}

.pay-qr {
  width: 148px;
  height: 148px;
  display: grid;
  place-items: center;
  border: 1px dashed var(--line);
  border-radius: var(--radius-sm);
  background: #fff;
  color: var(--muted);
  font-size: 0.78rem;
  text-align: center;
  padding: 8px;
  object-fit: contain;
}

.pay-method .button {
  width: 100%;
}

/* ---------- Enterprise page bits (added 2026-06-13) ---------- */

.offer-list {
  display: grid;
  gap: 14px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.offer-list li {
  position: relative;
  padding: 18px 20px 18px 52px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: #fff;
  color: var(--ink-2);
}

.offer-list li::before {
  content: counter(offer, decimal-leading-zero);
  counter-increment: offer;
  position: absolute;
  left: 18px;
  top: 18px;
  color: var(--purple);
  font-weight: 900;
  font-size: 0.95rem;
}

.offer-list {
  counter-reset: offer;
}

.offer-list li strong {
  color: var(--navy);
}

@media (max-width: 980px) {
  .trust-strip,
  .pay-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (max-width: 680px) {
  .trust-strip,
  .pay-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 980px) {
  .nav-links {
    position: fixed;
    inset: 72px 0 auto 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 12px 24px 22px;
    background: #fff;
    border-bottom: 1px solid var(--line);
    box-shadow: var(--shadow-hover);
  }

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

  .menu-toggle {
    display: inline-grid;
    place-items: center;
  }

  .nav-cta {
    width: max-content;
    margin-top: 8px;
  }

  .language-menu {
    width: max-content;
    margin-top: 10px;
  }

  .language-panel {
    left: 0;
    right: auto;
    top: calc(100% + 10px);
  }

  .section-heading,
  .matrix,
  .newsletter-panel,
  .two-col {
    grid-template-columns: 1fr;
  }

  .cards,
  .article-grid,
  .roadmap-grid,
  .concept-grid,
  .pricing-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .ladder {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .pricing-card.is-featured {
    grid-column: span 2;
  }
}

@media (max-width: 680px) {
  .hero-content {
    padding: 58px 0 70px;
  }

  .hero-proof,
  .cards,
  .article-grid,
  .feature-grid,
  .roadmap-grid,
  .concept-grid,
  .pricing-grid,
  .ladder {
    grid-template-columns: 1fr;
  }

  .pricing-card.is-featured {
    grid-column: auto;
  }

  .proof-item + .proof-item {
    border-left: 0;
    border-top: 1px solid rgba(255, 255, 255, 0.18);
    padding-left: 0;
  }

  main section,
  .page-shell {
    padding: 58px 0;
  }

  .newsletter-panel,
  .quote-panel,
  .content-panel,
  .card,
  .article-card,
  .feature,
  .pricing-card {
    padding: 22px;
  }

  .footer-inner {
    display: grid;
  }
}

/* ---------- Accessibility, breadcrumb, math ---------- */

.skip-link {
  position: fixed;
  top: 8px;
  left: 8px;
  z-index: 100;
  padding: 10px 16px;
  background: var(--purple);
  color: #fff;
  font-weight: 700;
  border-radius: 4px;
  transform: translateY(-150%);
  transition: transform 0.15s ease;
}

.skip-link:focus {
  transform: translateY(0);
}

/* Visible keyboard focus everywhere (links strip the default underline). */
a:focus-visible,
button:focus-visible,
input:focus-visible,
[tabindex]:focus-visible {
  outline: 2px solid var(--purple);
  outline-offset: 3px;
  border-radius: 2px;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  align-items: center;
  margin-bottom: 18px;
  color: var(--muted);
  font-size: 0.85rem;
}

.breadcrumb a:hover {
  color: var(--purple);
}

.breadcrumb [aria-current="page"] {
  color: var(--purple);
}

.breadcrumb span[aria-hidden="true"] {
  color: var(--line);
}

/* Inline math renders within a sentence; never a block. */
.math-inline {
  white-space: nowrap;
}

.math-block {
  margin: 24px 0;
  text-align: center;
}