:root {
  --navy: #122A53;
  --navy-2: #1A376A;
  --blue: #2F7DE1;
  --purple: #7155D9;
  --magenta: #B23886;
  --green: #2BB673;
  --ink: #172033;
  --muted: #667085;
  --line: #DDE5F0;
  --soft: #F6F8FC;
  --soft-blue: #F2F7FF;
  --soft-purple: #F6F3FF;
  --white: #FFFFFF;
  --shadow: 0 18px 60px rgba(18, 42, 83, 0.10);
  --radius: 24px;
  --radius-sm: 16px;
  --container: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--white);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

a {
  color: inherit;
}

svg {
  display: block;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 12px;
  z-index: 999;
  background: var(--navy);
  color: white;
  padding: 10px 14px;
  border-radius: 8px;
}

.skip-link:focus {
  left: 12px;
}

.container {
  width: min(calc(100% - 40px), var(--container));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, 0.88);
  border-bottom: 1px solid rgba(221, 229, 240, 0.75);
  backdrop-filter: blur(18px);
}

.header-inner {
  min-height: 78px;
  display: flex;
  align-items: center;
  gap: 32px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
}

.brand-mark {
  width: 34px;
  height: 34px;
}

.brand-mark svg {
  width: 100%;
  height: 100%;
}

.brand-name {
  color: var(--navy);
  font-size: 1.05rem;
  font-weight: 850;
  letter-spacing: 0.16em;
}

.site-nav {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: 26px;
}

.site-nav a {
  text-decoration: none;
  color: #42516A;
  font-size: 0.94rem;
  font-weight: 650;
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--blue), var(--purple));
  color: var(--white);
  font-weight: 750;
  text-decoration: none;
  border: 0;
  box-shadow: 0 10px 28px rgba(82, 94, 213, 0.26);
  transition: transform 180ms ease, box-shadow 180ms ease;
}

.button:hover,
.button:focus-visible {
  transform: translateY(-2px);
  box-shadow: 0 14px 34px rgba(82, 94, 213, 0.32);
}

.button-compact {
  min-height: 42px;
  padding-inline: 18px;
  font-size: 0.88rem;
}

.button-light {
  background: var(--white);
  color: var(--navy);
  box-shadow: none;
}

.text-link {
  color: var(--navy);
  font-weight: 750;
  text-decoration: none;
}

.text-link:hover,
.text-link:focus-visible {
  color: var(--purple);
}

.hero {
  position: relative;
  overflow: hidden;
  padding: 104px 0 88px;
  background:
    radial-gradient(circle at 82% 18%, rgba(113, 85, 217, 0.14), transparent 30%),
    radial-gradient(circle at 66% 54%, rgba(47, 125, 225, 0.10), transparent 34%),
    linear-gradient(180deg, #FFFFFF 0%, #FAFBFE 100%);
}

.hero::before {
  content: "";
  position: absolute;
  inset: auto -10% -220px;
  height: 360px;
  background: linear-gradient(90deg, rgba(47, 125, 225, 0.08), rgba(113, 85, 217, 0.07));
  border-radius: 50%;
  filter: blur(20px);
}

.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: minmax(0, 1.06fr) minmax(420px, 0.94fr);
  gap: 74px;
  align-items: center;
}

.eyebrow {
  margin: 0 0 14px;
  color: var(--purple);
  font-size: 0.79rem;
  font-weight: 850;
  letter-spacing: 0.15em;
  text-transform: uppercase;
}

h1,
h2,
h3 {
  margin-top: 0;
  color: var(--navy);
  line-height: 1.1;
  letter-spacing: -0.035em;
}

h1 {
  margin-bottom: 24px;
  font-size: clamp(3rem, 5.7vw, 5.45rem);
  max-width: 880px;
}

h2 {
  margin-bottom: 20px;
  font-size: clamp(2.1rem, 3.6vw, 3.7rem);
}

h3 {
  margin-bottom: 10px;
  font-size: 1.25rem;
}

.hero-lead {
  max-width: 700px;
  margin: 0;
  color: #526078;
  font-size: clamp(1.05rem, 1.6vw, 1.28rem);
}

.hero-actions {
  margin-top: 34px;
  display: flex;
  align-items: center;
  gap: 24px;
  flex-wrap: wrap;
}

.hero-notes {
  margin-top: 36px;
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.hero-notes span,
.module-cloud span {
  border: 1px solid var(--line);
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.76);
  color: #4D5B72;
  padding: 8px 12px;
  font-size: 0.82rem;
  font-weight: 700;
}

.hero-visual {
  min-height: 520px;
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.visual-orbit {
  position: absolute;
  border: 1px solid rgba(113, 85, 217, 0.20);
  border-radius: 50%;
}

.orbit-a {
  width: 460px;
  height: 460px;
}

.orbit-b {
  width: 340px;
  height: 340px;
  border-color: rgba(47, 125, 225, 0.22);
}

.system-card,
.system-core {
  position: relative;
  z-index: 2;
  width: min(100%, 420px);
  border: 1px solid rgba(221, 229, 240, 0.9);
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.88);
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
}

.system-card {
  padding: 18px 22px;
  text-align: center;
}

.system-card small,
.system-core .core-kicker,
.architecture-box small {
  display: block;
  margin-bottom: 7px;
  color: var(--purple);
  font-size: 0.7rem;
  font-weight: 850;
  letter-spacing: 0.12em;
}

.system-card strong,
.system-core strong,
.architecture-box strong {
  display: block;
  color: var(--navy);
}

.system-card-top {
  transform: translateY(18px);
}

.system-card-bottom {
  transform: translateY(-18px);
}

.system-core {
  width: min(100%, 470px);
  margin: 14px 0;
  padding: 34px 26px;
  text-align: center;
  border-color: rgba(113, 85, 217, 0.34);
  background: linear-gradient(145deg, rgba(255,255,255,0.94), rgba(246,243,255,0.94));
}

.system-core strong {
  font-size: 1.32rem;
}

.core-modules {
  margin-top: 22px;
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 8px;
}

.core-modules span {
  padding: 7px 10px;
  border-radius: 999px;
  background: var(--white);
  border: 1px solid rgba(113, 85, 217, 0.18);
  color: #526078;
  font-size: 0.74rem;
  font-weight: 700;
}

.section {
  padding: 110px 0;
}

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

.section-heading {
  max-width: 830px;
  margin-bottom: 52px;
}

.section-heading.compact {
  margin-bottom: 40px;
}

.section-heading p:not(.eyebrow) {
  margin: 0;
  color: var(--muted);
  font-size: 1.08rem;
}

.three-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}

.feature-card {
  min-height: 260px;
  padding: 32px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  box-shadow: 0 10px 30px rgba(18, 42, 83, 0.05);
}

.feature-number {
  display: inline-flex;
  margin-bottom: 38px;
  color: var(--purple);
  font-weight: 850;
}

.feature-card p,
.value-grid p,
.process-step p {
  margin: 0;
  color: var(--muted);
}

.process {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
}

.process-step {
  position: relative;
  min-height: 250px;
  padding: 26px 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: var(--white);
}

.process-step::after {
  content: "→";
  position: absolute;
  right: -13px;
  top: 38px;
  z-index: 3;
  color: var(--blue);
  font-weight: 850;
}

.process-step:last-child::after {
  display: none;
}

.process-step > span {
  width: 36px;
  height: 36px;
  margin-bottom: 30px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  color: var(--white);
  background: linear-gradient(135deg, var(--blue), var(--purple));
  font-weight: 850;
}

.integration-grid {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(520px, 1.15fr);
  align-items: center;
  gap: 70px;
}

.integration-copy {
  margin-bottom: 0;
}

.module-cloud {
  margin-top: 28px;
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.architecture {
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 28px;
  background:
    linear-gradient(145deg, rgba(242,247,255,0.9), rgba(246,243,255,0.9));
  box-shadow: var(--shadow);
}

.architecture-row {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
}

.architecture-row.dual {
  grid-template-columns: 1fr 1fr;
}

.architecture-box {
  padding: 23px 22px;
  border: 1px solid rgba(221,229,240,0.95);
  border-radius: 16px;
  background: rgba(255,255,255,0.92);
  text-align: center;
}

.architecture-box.emphasized {
  border-color: rgba(113,85,217,0.25);
}

.architecture-box.dark {
  background: var(--navy);
  border-color: var(--navy);
}

.architecture-box.dark small {
  color: #B9C9E7;
}

.architecture-box.dark strong {
  color: white;
}

.architecture-arrow {
  padding: 10px 0;
  text-align: center;
  color: var(--purple);
  font-size: 1.25rem;
  font-weight: 850;
}

.section-value {
  color: white;
  background:
    radial-gradient(circle at 85% 20%, rgba(47,125,225,0.38), transparent 30%),
    linear-gradient(135deg, #122A53, #1A376A 58%, #40348D);
}

.value-heading h2,
.value-heading .eyebrow {
  color: white;
}

.value-heading {
  max-width: 780px;
}

.value-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 18px;
}

.value-grid article {
  padding: 28px;
  border: 1px solid rgba(255,255,255,0.16);
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.08);
  backdrop-filter: blur(10px);
}

.value-grid h3 {
  color: white;
}

.value-grid p {
  color: #D7E1F2;
}

.closing {
  padding: 82px 0;
  background: linear-gradient(135deg, #F3F8FF, #F7F3FF);
}

.closing-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 42px;
}

.closing h2 {
  max-width: 830px;
  margin-bottom: 0;
  font-size: clamp(2rem, 3.4vw, 3.4rem);
}

.closing .button-light {
  border: 1px solid var(--line);
  background: white;
  box-shadow: 0 10px 30px rgba(18, 42, 83, 0.08);
}

.site-footer {
  padding: 28px 0;
  border-top: 1px solid var(--line);
  background: white;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  color: var(--muted);
  font-size: 0.9rem;
}

.footer-inner a {
  text-decoration: none;
  color: var(--navy);
  font-weight: 750;
}

@media (max-width: 1060px) {
  .site-nav {
    display: none;
  }

  .hero-grid,
  .integration-grid {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    min-height: 470px;
  }

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

  .process-step::after {
    display: none;
  }

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

@media (max-width: 760px) {
  .container {
    width: min(calc(100% - 28px), var(--container));
  }

  .site-header .button-compact {
    margin-left: auto;
    max-width: 160px;
    overflow: hidden;
    white-space: nowrap;
    text-overflow: ellipsis;
  }

  .header-inner {
    gap: 12px;
  }

  .brand-name {
    font-size: 0.94rem;
  }

  .hero {
    padding: 72px 0 58px;
  }

  h1 {
    font-size: clamp(2.55rem, 13vw, 4.2rem);
  }

  .hero-grid {
    gap: 42px;
  }

  .hero-visual {
    min-height: auto;
    display: grid;
    gap: 10px;
  }

  .visual-orbit {
    display: none;
  }

  .system-card,
  .system-core,
  .system-card-top,
  .system-card-bottom {
    width: 100%;
    transform: none;
    margin: 0;
  }

  .section {
    padding: 78px 0;
  }

  .three-grid,
  .process,
  .value-grid,
  .architecture-row.dual {
    grid-template-columns: 1fr;
  }

  .feature-card,
  .process-step {
    min-height: auto;
  }

  .integration-grid {
    gap: 42px;
  }

  .architecture {
    padding: 18px;
  }

  .closing-inner {
    align-items: flex-start;
    flex-direction: column;
  }

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

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}


/* v2: language selector + integrated Miranda AI Core */
body { font-family: Inter, "Noto Sans SC", "PingFang SC", "Microsoft YaHei", ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif; }
.language-switcher { display:inline-flex; align-items:center; gap:4px; padding:4px; border:1px solid var(--line); border-radius:999px; background:#fff; }
.language-switcher a { min-width:34px; padding:5px 9px; border-radius:999px; text-align:center; text-decoration:none; color:var(--muted); font-size:.78rem; font-weight:800; }
.language-switcher a.active { background:var(--navy); color:#fff; }
.core-engine { margin-top:18px; padding-top:16px; border-top:1px solid rgba(113,85,217,.14); color:#4d5b72; font-size:.8rem; font-weight:700; }
@media (max-width:760px) {
  .language-switcher { margin-left:auto; }
  .site-header .button-compact { display:none; }
}