:root {
  --bg: #071827;
  --bg-alt: #0c2234;
  --surface: rgba(9, 28, 42, 0.82);
  --surface-strong: #0f2b41;
  --card: #f7fbfd;
  --card-border: rgba(255, 255, 255, 0.14);
  --text: #e9f4fb;
  --muted: #9fb5c6;
  --ink: #0e2231;
  --line: rgba(159, 181, 198, 0.2);
  --accent: #24c1a7;
  --accent-strong: #11a18e;
  --accent-soft: rgba(36, 193, 167, 0.14);
  --warning: #ffd28d;
  --shadow: 0 28px 70px rgba(1, 10, 18, 0.32);
  --radius: 24px;
  --radius-sm: 16px;
  --max-width: 1180px;
  --font-display: "Space Grotesk", "Segoe UI", sans-serif;
  --font-body: "Manrope", "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--text);
  background:
    radial-gradient(circle at top right, rgba(36, 193, 167, 0.18), transparent 26%),
    radial-gradient(circle at left 15%, rgba(70, 143, 255, 0.16), transparent 20%),
    linear-gradient(180deg, #081625 0%, #06111c 60%, #08111a 100%);
  line-height: 1.6;
}

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

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

button,
input,
select,
textarea {
  font: inherit;
}

.container {
  width: min(calc(100% - 2rem), var(--max-width));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  backdrop-filter: blur(18px);
  background: rgba(5, 15, 24, 0.72);
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: 1rem 0;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.85rem;
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.03em;
}

.brand-mark {
  width: 2.6rem;
  height: 2.6rem;
  border-radius: 18px;
  display: grid;
  place-items: center;
  background: linear-gradient(135deg, rgba(36, 193, 167, 0.28), rgba(48, 109, 255, 0.2));
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.brand small {
  display: block;
  font-size: 0.72rem;
  color: var(--muted);
  font-weight: 600;
  letter-spacing: 0.02em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.2rem;
  color: var(--muted);
  font-size: 0.95rem;
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--text);
}

.nav-toggle {
  display: none;
}

.language-switcher,
.legal-actions {
  display: flex;
  align-items: center;
  gap: 0.65rem;
}

.language-switcher {
  padding: 0.3rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.lang-button {
  border: 0;
  background: transparent;
  color: var(--muted);
  font-weight: 700;
  padding: 0.55rem 0.8rem;
  border-radius: 999px;
  cursor: pointer;
}

.lang-button.active {
  color: #06231e;
  background: linear-gradient(135deg, #3de8cf, #86f0d2);
}

.hero {
  position: relative;
  padding: 4.6rem 0 2.8rem;
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 2rem;
  align-items: start;
}

.eyebrow {
  display: inline-flex;
  gap: 0.6rem;
  align-items: center;
  padding: 0.4rem 0.8rem;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  color: #c3d7e4;
  font-size: 0.86rem;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.hero h1,
.section-heading h2,
.cta-panel h2,
.legal-content h1 {
  font-family: var(--font-display);
  line-height: 1.05;
  letter-spacing: -0.05em;
  margin: 0;
  text-wrap: balance;
}

.hero h1 {
  font-size: clamp(2.8rem, 7vw, 5rem);
  max-width: 12ch;
  margin-top: 1rem;
}

.hero p.lead {
  font-size: 1.1rem;
  color: #d2e4ef;
  max-width: 62ch;
  margin: 1.25rem 0 1.6rem;
}

.hero-points,
.mini-list,
.check-list,
.policy-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.hero-points {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
  margin-bottom: 1.7rem;
}

.hero-points li,
.mini-list li,
.check-list li,
.policy-list li {
  display: flex;
  gap: 0.75rem;
  align-items: flex-start;
}

.hero-points li::before,
.mini-list li::before,
.check-list li::before,
.policy-list li::before {
  content: "";
  width: 0.9rem;
  height: 0.9rem;
  border-radius: 50%;
  background: radial-gradient(circle at 30% 30%, #9cf6e8, var(--accent));
  box-shadow: 0 0 0 6px rgba(36, 193, 167, 0.1);
  margin-top: 0.35rem;
  flex: none;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.9rem;
  margin-bottom: 1.1rem;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 3rem;
  padding: 0.85rem 1.2rem;
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 700;
  transition: transform 180ms ease, background 180ms ease, border-color 180ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-1px);
}

.button-primary {
  color: #03211d;
  background: linear-gradient(135deg, #3de8cf, #86f0d2);
  box-shadow: 0 18px 36px rgba(36, 193, 167, 0.28);
}

.button-secondary {
  color: var(--text);
  border-color: rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.05);
}

.trust-note,
.pricing-note,
.compliance-note {
  font-size: 0.95rem;
  color: #c8dbe7;
}

.hero-stack {
  display: grid;
  gap: 1rem;
}

.glass-card,
.stat-card,
.diagram-card,
.content-card,
.price-card,
.faq-item,
.form-card,
.cta-panel,
.legal-panel {
  border-radius: var(--radius);
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow);
}

.glass-card {
  background: linear-gradient(180deg, rgba(15, 40, 58, 0.9), rgba(8, 24, 36, 0.88));
  padding: 1.5rem;
}

.hero-diagram {
  position: relative;
  min-height: 520px;
}

.hero-screen {
  background: linear-gradient(180deg, rgba(247, 251, 253, 0.96), rgba(230, 241, 248, 0.94));
  color: var(--ink);
  padding: 1.2rem;
}

.terminal-bar {
  display: flex;
  gap: 0.45rem;
  margin-bottom: 1rem;
}

.terminal-bar span {
  width: 0.72rem;
  height: 0.72rem;
  border-radius: 50%;
  background: #d0dbe3;
}

.screen-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 1rem;
}

.screen-panel {
  background: #eff6fa;
  padding: 1rem;
  border-radius: 18px;
  border: 1px solid rgba(14, 34, 49, 0.08);
}

.screen-panel.dark {
  background: linear-gradient(180deg, #0e2332, #122d42);
  color: #ddedf7;
}

.screen-panel h3,
.content-card h3,
.price-card h3,
.diagram-node h3,
.faq-trigger span,
.legal-panel h2 {
  margin: 0 0 0.6rem;
  font-family: var(--font-display);
  letter-spacing: -0.03em;
  line-height: 1.2;
  text-wrap: balance;
}

.hero-grid > *,
.feature-grid > *,
.split-section > *,
.lead-layout > *,
.footer-grid > *,
.screen-grid > *,
.stat-grid > *,
.card-grid > *,
.pain-grid > *,
.plans-grid > *,
.use-case-grid > *,
.policy-grid > *,
.process-grid > *,
.diagram-flow > *,
.diagram-footer > * {
  min-width: 0;
}

.screen-line {
  height: 0.7rem;
  border-radius: 999px;
  background: rgba(14, 34, 49, 0.08);
  margin-bottom: 0.7rem;
}

.screen-panel.dark .screen-line {
  background: rgba(255, 255, 255, 0.12);
}

.badge-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1rem;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  border-radius: 999px;
  padding: 0.55rem 0.8rem;
  background: rgba(9, 28, 42, 0.07);
  font-size: 0.86rem;
  color: #244154;
}

.floating-note {
  position: absolute;
  right: -0.4rem;
  bottom: 1.2rem;
  max-width: 250px;
  background: rgba(11, 28, 42, 0.96);
  padding: 1rem;
}

.stat-grid,
.card-grid,
.plans-grid,
.use-case-grid,
.process-grid,
.footer-grid,
.policy-grid {
  display: grid;
  gap: 1rem;
}

.stat-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.stat-card {
  background: rgba(255, 255, 255, 0.04);
  padding: 1.1rem 1.2rem;
}

.stat-card strong {
  display: block;
  font-size: 1.6rem;
  font-family: var(--font-display);
}

main section {
  padding: 1.5rem 0 0;
}

.section-heading {
  max-width: 70ch;
  margin-bottom: 1.5rem;
}

.section-heading h2,
.cta-panel h2,
.legal-content h1 {
  font-size: clamp(2rem, 4.2vw, 3.2rem);
  margin-bottom: 0.8rem;
}

.section-heading p,
.cta-panel p,
.legal-content p,
.content-card p,
.price-card p,
.faq-panel p,
.diagram-footer p {
  color: var(--muted);
  margin: 0;
}

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

.pain-grid {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.content-card,
.faq-item,
.form-card,
.price-card,
.diagram-card,
.legal-panel {
  background: var(--card);
  color: var(--ink);
}

.content-card,
.price-card,
.form-card,
.legal-panel {
  padding: 1.45rem;
}

.content-card,
.price-card,
.policy-card,
.step-card,
.stat-card,
.diagram-node {
  height: 100%;
}

.content-card .kicker,
.price-card .kicker {
  display: inline-flex;
  margin-bottom: 0.85rem;
  font-size: 0.76rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent-strong);
  font-weight: 800;
}

.feature-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 1rem;
}

.surface-panel {
  background: linear-gradient(180deg, rgba(9, 28, 42, 0.82), rgba(7, 22, 33, 0.9));
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

.surface-panel h3,
.surface-panel p,
.surface-panel li {
  color: var(--text);
}

.surface-panel p {
  color: #cde0eb;
}

.check-list {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.85rem;
  margin-top: 1.25rem;
}

.architecture {
  display: grid;
  gap: 1.25rem;
}

.diagram-card {
  padding: 1.5rem;
}

.diagram-flow {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0.8rem;
  align-items: stretch;
}

.diagram-node {
  background: linear-gradient(180deg, rgba(36, 193, 167, 0.08), rgba(14, 34, 49, 0.03));
  border-radius: 18px;
  padding: 1rem;
  border: 1px solid rgba(14, 34, 49, 0.08);
  position: relative;
}

.diagram-node:not(:last-child)::after {
  content: "→";
  position: absolute;
  right: -0.7rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--accent-strong);
  font-size: 1.2rem;
  font-weight: 800;
}

.diagram-footer {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 1rem;
  margin-top: 1rem;
}

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

.plans-grid-single {
  grid-template-columns: minmax(0, 520px);
  justify-content: center;
}

.price-card {
  position: relative;
}

.price-card.featured {
  background: linear-gradient(180deg, #f7fbfd, #ebfffb);
}

.price {
  display: flex;
  align-items: baseline;
  gap: 0.25rem;
  margin: 1rem 0 0.6rem;
  font-family: var(--font-display);
}

.price strong {
  font-size: 2rem;
}

.price span {
  color: #486073;
  font-weight: 700;
}

.pill {
  position: absolute;
  top: 1rem;
  right: 1rem;
  border-radius: 999px;
  background: var(--accent-soft);
  color: var(--accent-strong);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 0.45rem 0.7rem;
}

.price-card ul {
  list-style: none;
  padding: 0;
  margin: 0 0 1.2rem;
}

.price-card li {
  padding: 0.45rem 0;
  border-bottom: 1px solid rgba(14, 34, 49, 0.08);
}

.split-section {
  display: grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 1rem;
}

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

.policy-card {
  background: rgba(255, 255, 255, 0.05);
  border-radius: 22px;
  padding: 1.25rem;
  border: 1px solid rgba(255, 255, 255, 0.09);
  height: 100%;
}

.policy-card h3 {
  margin-top: 0;
  margin-bottom: 0.8rem;
  font-family: var(--font-display);
  line-height: 1.2;
  text-wrap: balance;
}

.use-case-grid .content-card {
  min-height: 100%;
}

.process-grid {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.step-card {
  background: linear-gradient(180deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.03));
  padding: 1.25rem;
  border-radius: 22px;
  border: 1px solid rgba(255, 255, 255, 0.08);
}

.step-count {
  display: inline-grid;
  place-items: center;
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 50%;
  background: rgba(36, 193, 167, 0.16);
  color: #9cf6e8;
  font-family: var(--font-display);
  font-weight: 800;
  margin-bottom: 0.9rem;
}

.faq-panel {
  display: grid;
  gap: 0.85rem;
}

.faq-item {
  overflow: hidden;
}

.faq-trigger {
  width: 100%;
  border: 0;
  background: transparent;
  padding: 1.2rem 1.35rem;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  cursor: pointer;
  color: var(--ink);
}

.faq-trigger span {
  display: block;
  flex: 1;
  text-align: left;
}

.faq-trigger svg {
  transition: transform 180ms ease;
  flex: none;
}

.faq-item[open] .faq-trigger svg {
  transform: rotate(45deg);
}

.faq-content {
  padding: 0 1.35rem 1.2rem;
}

.lead-layout {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 1rem;
  align-items: start;
}

.form-card form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

.field,
.field-full {
  display: grid;
  gap: 0.45rem;
}

.field-full {
  grid-column: 1 / -1;
}

.field label,
.field-full label {
  font-weight: 700;
  color: var(--ink);
}

.field input,
.field select,
.field textarea,
.field-full input,
.field-full select,
.field-full textarea {
  width: 100%;
  border-radius: 16px;
  border: 1px solid rgba(14, 34, 49, 0.12);
  background: #ffffff;
  padding: 0.9rem 1rem;
  color: var(--ink);
}

.field textarea,
.field-full textarea {
  min-height: 150px;
  resize: vertical;
}

.form-success {
  display: none;
  margin-top: 1rem;
  padding: 1rem 1.1rem;
  background: rgba(36, 193, 167, 0.12);
  border-radius: 16px;
  color: #0c5c4e;
  font-weight: 700;
}

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

.cta-panel {
  background: linear-gradient(135deg, rgba(16, 48, 71, 0.96), rgba(6, 20, 31, 0.96));
  padding: 2rem;
}

html[lang="zh-CN"] .hero h1,
html[lang="zh-CN"] .section-heading h2,
html[lang="zh-CN"] .cta-panel h2,
html[lang="zh-CN"] .legal-content h1 {
  letter-spacing: -0.02em;
  line-height: 1.12;
}

.site-footer {
  padding: 2rem 0 3rem;
}

.footer-grid {
  grid-template-columns: 1.1fr 0.9fr;
  gap: 1rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  padding-top: 1.5rem;
}

.footer-links {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  color: #c6d8e4;
}

.footer-links a:hover,
.footer-links a:focus-visible {
  color: #ffffff;
}

.legal-body {
  min-height: 100vh;
}

.legal-content {
  padding: 4rem 0 3rem;
}

.legal-stack {
  display: grid;
  gap: 1rem;
}

.legal-panel p + p,
.legal-panel ul,
.legal-panel ol {
  margin-top: 0.8rem;
}

.legal-panel ul,
.legal-panel ol {
  color: #365061;
}

.legal-panel li + li {
  margin-top: 0.45rem;
}

.muted {
  color: var(--muted);
}

@media (max-width: 1080px) {
  .hero-grid,
  .feature-grid,
  .split-section,
  .lead-layout,
  .diagram-footer,
  .footer-grid {
    grid-template-columns: 1fr;
  }

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

  .pain-grid {
    grid-template-columns: 1fr;
  }

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

  .diagram-flow {
    grid-template-columns: 1fr;
  }

  .diagram-node:not(:last-child)::after {
    content: "↓";
    right: auto;
    left: 50%;
    top: auto;
    bottom: -0.85rem;
    transform: translateX(-50%);
  }
}

@media (max-width: 760px) {
  .nav {
    align-items: flex-start;
    flex-wrap: wrap;
  }

  .legal-actions {
    width: 100%;
    justify-content: space-between;
  }

  .nav-toggle {
    display: inline-flex;
    border: 1px solid rgba(255, 255, 255, 0.12);
    background: rgba(255, 255, 255, 0.05);
    color: var(--text);
    border-radius: 999px;
    padding: 0.7rem 1rem;
    cursor: pointer;
  }

  .nav-links {
    width: 100%;
    display: none;
    flex-direction: column;
    align-items: flex-start;
    padding-top: 0.5rem;
  }

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

  .language-switcher {
    order: 4;
  }

  .hero {
    padding-top: 3.3rem;
  }

  .hero-points,
  .stat-grid,
  .card-grid,
  .pain-grid,
  .plans-grid,
  .use-case-grid,
  .policy-grid,
  .process-grid,
  .form-card form,
  .check-list,
  .screen-grid {
    grid-template-columns: 1fr;
  }

  .floating-note {
    position: static;
    max-width: none;
  }

  .button-row {
    flex-direction: column;
  }

  .button {
    width: 100%;
  }
}