:root {
  --ink: #151719;
  --muted: #5f6872;
  --line: #dfe4e8;
  --surface: #ffffff;
  --surface-soft: #f7f8fc;
  --surface-tint: #eef2ff;
  --primary: #4f46e5;
  --primary-dark: #3730a3;
  --secondary: #7c3aed;
  --blue-accent: #2563eb;
  --graphite: #202235;
  --shadow: 0 18px 48px rgba(31, 41, 55, 0.12);
  --radius: 8px;
  --max: 1180px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--surface);
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", sans-serif;
  font-size: 16px;
  line-height: 1.6;
  letter-spacing: 0;
  overflow-x: hidden;
}

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

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

p {
  margin: 0;
  overflow-wrap: anywhere;
}

.site-header {
  position: fixed;
  top: 0;
  right: 0;
  left: 0;
  z-index: 30;
  background: rgba(12, 15, 24, 0.6);
  border-bottom: 1px solid rgba(255, 255, 255, 0.14);
  box-shadow: 0 12px 32px rgba(9, 12, 20, 0.16);
}

.nav-shell {
  width: min(calc(100% - 32px), var(--max));
  height: 76px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
}

.brand {
  display: inline-flex;
  align-items: flex-end;
  gap: 14px;
  min-width: 270px;
}

.brand-logo {
  width: 132px;
  height: auto;
  flex: 0 0 auto;
  filter: invert(1);
}

.brand-text {
  display: grid;
  gap: 2px;
  transform: translateY(1px);
}

.brand-name {
  color: #fff;
  font-size: 16px;
  font-weight: 500;
  letter-spacing: 0.08em;
  line-height: 1;
}

.brand-sub {
  color: rgba(255, 255, 255, 0.68);
  font-size: 12px;
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  align-items: center;
  justify-content: center;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 6px;
}

.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  width: 18px;
  height: 2px;
  display: block;
  background: #fff;
  content: "";
}

.nav-toggle span::before {
  transform: translateY(-6px);
}

.nav-toggle span::after {
  transform: translateY(4px);
}

.site-nav {
  display: flex;
  align-items: center;
  gap: 22px;
  color: rgba(255, 255, 255, 0.78);
  font-size: 15px;
}

.site-nav a {
  padding: 8px 0;
  border-bottom: 2px solid transparent;
}

.site-nav a:hover,
.site-nav a.is-active {
  color: #fff;
  border-bottom-color: var(--primary);
}

.hero {
  min-height: 100svh;
  position: relative;
  display: grid;
  align-items: center;
  overflow: hidden;
  color: #fff;
  background: var(--graphite);
}

.hero::before {
  position: absolute;
  inset: 0;
  z-index: 0;
  background:
    linear-gradient(90deg, rgba(12, 15, 24, 0.78) 0%, rgba(12, 15, 24, 0.54) 38%, rgba(12, 15, 24, 0.1) 76%),
    url("hero-workbench.png") center / cover no-repeat;
  content: "";
}

.hero::after {
  position: absolute;
  right: 0;
  bottom: 0;
  left: 0;
  z-index: 0;
  height: 160px;
  background: linear-gradient(180deg, transparent, rgba(12, 15, 24, 0.34));
  content: "";
}

.hero-content {
  position: relative;
  z-index: 1;
  width: min(calc(100% - 32px), var(--max));
  margin: 0 auto;
  padding: 156px 0 108px;
}

.eyebrow {
  color: var(--primary);
  font-weight: 800;
  font-size: 14px;
}

.hero .eyebrow {
  color: #c7d2fe;
}

h1,
h2,
h3 {
  margin: 0;
  line-height: 1.16;
  letter-spacing: 0;
  overflow-wrap: anywhere;
}

.hero h1 {
  max-width: 580px;
  margin-top: 16px;
  font-size: clamp(42px, 8vw, 72px);
  font-weight: 900;
}

.hero-copy {
  max-width: 620px;
  margin-top: 22px;
  color: rgba(255, 255, 255, 0.86);
  font-size: clamp(17px, 2.2vw, 21px);
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 20px;
  border: 1px solid transparent;
  border-radius: 6px;
  font-weight: 800;
  cursor: pointer;
}

.button-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--blue-accent), var(--secondary));
  box-shadow: 0 14px 28px rgba(79, 70, 229, 0.28);
}

.button-primary:hover {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
}

.button-secondary {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.36);
  background: rgba(255, 255, 255, 0.1);
}

.button-secondary:hover {
  border-color: rgba(255, 255, 255, 0.76);
}

.button-light {
  color: var(--primary-dark);
  background: #fff;
  border-color: #fff;
}

.hero-note {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 16px;
  margin-top: 22px;
  color: rgba(255, 255, 255, 0.82);
  font-size: 15px;
}

.hero-note span {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  padding: 0 11px;
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: 999px;
}

.section {
  padding: 78px 0;
}

.section-tight {
  padding: 52px 0;
}

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

.section-soft + .section-soft {
  padding-top: 34px;
}

.home-principles-section {
  padding-bottom: 34px;
}

.section-ink {
  color: #fff;
  background: var(--graphite);
}

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

.section-head {
  display: grid;
  gap: 14px;
  max-width: 760px;
  margin-bottom: 34px;
}

.section-head h2 {
  font-size: clamp(28px, 4.6vw, 42px);
}

.section-head p {
  color: var(--muted);
  font-size: 17px;
}

.section-ink .section-head p,
.section-ink .muted {
  color: rgba(255, 255, 255, 0.72);
}

.grid {
  display: grid;
  gap: 18px;
}

.grid > *,
.split > *,
.cta-band > *,
.footer-top > *,
.footer-meta > *,
.footer-bottom > * {
  min-width: 0;
}

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

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

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

.card {
  min-width: 0;
  min-height: 100%;
  padding: 24px;
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 10px 30px rgba(31, 41, 55, 0.05);
}

.card h3 {
  margin-bottom: 12px;
  font-size: 21px;
}

.card p,
.muted {
  color: var(--muted);
}

.card-accent {
  border-top: 4px solid var(--primary);
}

.section-ink .card {
  color: #fff;
  background: rgba(255, 255, 255, 0.06);
  border-color: rgba(255, 255, 255, 0.14);
}

.section-ink .card p {
  color: rgba(255, 255, 255, 0.72);
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(0, 1.05fr);
  gap: 44px;
  align-items: center;
}

.page-hero {
  padding: 148px 0 64px;
  color: #fff;
  background:
    linear-gradient(115deg, rgba(20, 23, 42, 0.98), rgba(49, 46, 129, 0.78)),
    var(--graphite);
}

.rd-hero {
  padding: 148px 0 74px;
  background:
    linear-gradient(105deg, rgba(15, 18, 32, 0.96), rgba(32, 35, 53, 0.84) 48%, rgba(67, 56, 202, 0.62)),
    url("hero-workbench.png") center / cover no-repeat;
}

.rd-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.62fr);
  gap: 42px;
  align-items: center;
}

.rd-visual {
  min-height: 300px;
  display: grid;
  align-items: center;
}

.rd-visual-frame {
  position: relative;
  min-height: 300px;
  overflow: hidden;
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.12), rgba(255, 255, 255, 0.04)),
    rgba(15, 23, 42, 0.48);
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: var(--radius);
  box-shadow: 0 24px 60px rgba(15, 23, 42, 0.28);
}

.rd-visual-frame::before {
  position: absolute;
  inset: 22px;
  border: 1px solid rgba(199, 210, 254, 0.2);
  content: "";
}

.rd-visual-frame::after {
  position: absolute;
  top: 34px;
  right: 32px;
  left: 32px;
  height: 2px;
  background: linear-gradient(90deg, transparent, rgba(96, 165, 250, 0.86), transparent);
  content: "";
}

.rd-grid-line {
  position: absolute;
  background: rgba(199, 210, 254, 0.14);
}

.rd-grid-line-v {
  top: 22px;
  bottom: 22px;
  left: 50%;
  width: 1px;
}

.rd-grid-line-h {
  right: 22px;
  bottom: 38%;
  left: 22px;
  height: 1px;
}

.rd-target-box {
  position: absolute;
  top: 86px;
  left: 78px;
  width: 118px;
  height: 132px;
  border: 2px solid rgba(129, 140, 248, 0.9);
  border-radius: 8px;
  box-shadow: 0 0 0 8px rgba(79, 70, 229, 0.14);
}

.rd-target-box::before,
.rd-target-box::after {
  position: absolute;
  width: 22px;
  height: 2px;
  background: rgba(255, 255, 255, 0.88);
  content: "";
}

.rd-target-box::before {
  top: -2px;
  left: 12px;
}

.rd-target-box::after {
  right: 12px;
  bottom: -2px;
}

.rd-target-dot {
  position: absolute;
  top: 145px;
  left: 126px;
  width: 18px;
  height: 18px;
  background: #c7d2fe;
  border: 5px solid rgba(37, 99, 235, 0.8);
  border-radius: 50%;
}

.rd-track-line {
  position: absolute;
  top: 150px;
  right: 116px;
  left: 188px;
  height: 2px;
  background: linear-gradient(90deg, rgba(199, 210, 254, 0.18), rgba(96, 165, 250, 0.86));
}

.rd-track-line::after {
  position: absolute;
  top: -5px;
  right: -2px;
  width: 12px;
  height: 12px;
  background: #60a5fa;
  border-radius: 50%;
  content: "";
}

.rd-stabilizer {
  position: absolute;
  right: 58px;
  bottom: 54px;
  width: 94px;
  height: 94px;
  border: 2px solid rgba(255, 255, 255, 0.76);
  border-radius: 50%;
}

.rd-stabilizer::before,
.rd-stabilizer::after {
  position: absolute;
  content: "";
}

.rd-stabilizer::before {
  inset: 22px;
  border: 2px solid rgba(96, 165, 250, 0.8);
  border-radius: 50%;
}

.rd-stabilizer::after {
  top: 43px;
  left: 18px;
  width: 58px;
  height: 8px;
  background: #c7d2fe;
  border-radius: 999px;
}

.rd-chip {
  position: absolute;
  min-height: 32px;
  padding: 6px 10px;
  color: #fff;
  background: rgba(79, 70, 229, 0.72);
  border: 1px solid rgba(255, 255, 255, 0.22);
  border-radius: 6px;
  font-size: 13px;
  font-weight: 800;
}

.rd-chip-primary {
  top: 44px;
  left: 48px;
}

.rd-chip-secondary {
  right: 42px;
  bottom: 166px;
  background: rgba(37, 99, 235, 0.72);
}

.rd-system-section {
  position: relative;
  padding-top: 34px;
}

.rd-core-section {
  padding-bottom: 34px;
}

.rd-system {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 0;
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 18px 46px rgba(31, 41, 55, 0.06);
}

.rd-system-card {
  position: relative;
  min-height: 220px;
  padding: 28px 24px;
  background: linear-gradient(180deg, #ffffff, #fbfcff);
  border-right: 1px solid var(--line);
}

.rd-system-card:last-child {
  border-right: 0;
}

.rd-system-card::before {
  display: block;
  margin-bottom: 42px;
  color: var(--primary);
  font-size: 14px;
  font-weight: 900;
  content: attr(data-step);
}

.rd-system-card::after {
  position: absolute;
  top: 46px;
  right: 24px;
  left: 64px;
  height: 1px;
  background: linear-gradient(90deg, rgba(79, 70, 229, 0.38), transparent);
  content: "";
}

.rd-system-card h3 {
  margin-bottom: 12px;
  color: var(--ink);
  font-size: 21px;
}

.rd-system-card p {
  color: var(--muted);
}

.scenario-card {
  position: relative;
  overflow: hidden;
}

.scenario-card::after {
  position: absolute;
  right: 18px;
  bottom: 12px;
  color: rgba(79, 70, 229, 0.08);
  font-size: 54px;
  font-weight: 900;
  line-height: 1;
  content: attr(data-index);
}

.cta-band {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 24px;
  align-items: center;
  padding: 34px;
  color: #fff;
  background:
    linear-gradient(135deg, rgba(37, 99, 235, 0.94), rgba(124, 58, 237, 0.94)),
    var(--primary);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.cta-band p {
  margin-top: 8px;
  color: rgba(255, 255, 255, 0.78);
}

.page-hero h1 {
  max-width: 760px;
  margin-top: 14px;
  font-size: clamp(36px, 6vw, 58px);
}

.page-hero p {
  max-width: 720px;
  margin-top: 18px;
  color: rgba(255, 255, 255, 0.76);
  font-size: 18px;
}

.breadcrumb {
  color: rgba(255, 255, 255, 0.62);
  font-size: 14px;
}

.pill-list {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.pill {
  padding: 7px 12px;
  color: var(--primary-dark);
  background: var(--surface-tint);
  border: 1px solid rgba(79, 70, 229, 0.2);
  border-radius: 999px;
  font-size: 14px;
  font-weight: 700;
}

.timeline {
  display: grid;
  gap: 12px;
  counter-reset: step;
}

.timeline-item {
  display: grid;
  grid-template-columns: 54px 1fr;
  gap: 16px;
  align-items: start;
  padding: 20px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.timeline-item::before {
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  color: #fff;
  background: var(--primary);
  border-radius: 6px;
  font-weight: 800;
}

.timeline-item h3 {
  margin-bottom: 6px;
  font-size: 19px;
}

.contact-channel-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  max-width: 900px;
  margin: 0 auto;
}

.contact-channel {
  min-height: 100%;
  padding: 24px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 10px 30px rgba(31, 41, 55, 0.05);
}

.contact-channel h3 {
  margin-bottom: 16px;
  font-size: 21px;
}

.contact-channel dl {
  display: grid;
  gap: 12px;
  margin: 0;
}

.contact-channel dl div {
  display: grid;
  grid-template-columns: 92px 1fr;
  gap: 12px;
  padding-top: 12px;
  border-top: 1px solid var(--line);
}

.contact-channel dt {
  color: var(--ink);
  font-weight: 800;
}

.contact-channel dd {
  margin: 0;
  color: var(--muted);
}

.contact-link {
  display: inline-flex;
  align-items: center;
  min-height: 28px;
  color: var(--primary-dark);
  font-weight: 400;
  font-variant-numeric: tabular-nums;
  white-space: nowrap;
}

.contact-link:hover {
  color: var(--primary);
}

.site-footer {
  position: relative;
  overflow: hidden;
  padding: 42px 0 34px;
  color: rgba(255, 255, 255, 0.72);
  background:
    linear-gradient(118deg, rgba(79, 70, 229, 0.14) 0%, rgba(79, 70, 229, 0) 36%),
    linear-gradient(90deg, #20232e 0%, #171a22 54%, #151821 100%);
}

.site-footer::before {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(135deg, transparent 0 30%, rgba(255, 255, 255, 0.035) 30% 43%, transparent 43% 100%),
    linear-gradient(90deg, rgba(255, 255, 255, 0.04), transparent 44%, rgba(255, 255, 255, 0.03));
  content: "";
  pointer-events: none;
}

.site-footer .container {
  position: relative;
  z-index: 1;
}

.footer-panel {
  display: grid;
}

.footer-top,
.footer-meta,
.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
}

.footer-top {
  gap: 22px 46px;
  justify-content: flex-start;
  padding-bottom: 24px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.22);
}

.footer-brand {
  display: inline-flex;
  align-items: flex-end;
  gap: 18px;
  color: #fff;
  font-size: 16px;
  font-weight: 500;
}

.footer-brand-logo {
  width: 132px;
  height: auto;
  filter: invert(1);
  opacity: 0.98;
}

.footer-brand span {
  letter-spacing: 0.08em;
  line-height: 1;
  transform: translateY(1px);
  white-space: nowrap;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 12px 30px;
  font-size: 15px;
  font-weight: 700;
}

.footer-meta {
  gap: 14px 28px;
  justify-content: space-between;
  padding: 22px 0 14px;
  font-size: 15px;
}

.footer-bottom {
  gap: 12px 28px;
  color: rgba(255, 255, 255, 0.58);
  font-size: 14px;
}

.footer-nav a,
.footer-meta a,
.footer-meta span,
.footer-bottom a {
  color: rgba(255, 255, 255, 0.7);
}

.footer-nav a:hover,
.footer-meta a:hover,
.footer-bottom a:hover {
  color: #fff;
}

@media (max-width: 920px) {
  .nav-toggle {
    display: inline-flex;
  }

  .site-nav {
    position: absolute;
    top: 76px;
    right: 16px;
    left: 16px;
    display: none;
    padding: 18px;
    background: rgba(12, 15, 24, 0.96);
    border: 1px solid rgba(255, 255, 255, 0.16);
    border-radius: var(--radius);
    box-shadow: 0 22px 54px rgba(9, 12, 20, 0.28);
  }

  .site-nav.is-open {
    display: grid;
    gap: 8px;
  }

  .hero {
    min-height: auto;
  }

  .hero::before {
    background:
      linear-gradient(90deg, rgba(18, 21, 24, 0.88) 0%, rgba(18, 21, 24, 0.72) 62%, rgba(18, 21, 24, 0.38) 100%),
      url("hero-workbench.png") center / cover no-repeat;
  }

  .hero-content {
    padding: 132px 0 76px;
  }

  .grid-2,
  .grid-3,
  .grid-4,
  .split,
  .rd-hero-grid,
  .contact-channel-grid,
  .cta-band {
    grid-template-columns: 1fr;
  }

  .footer-top,
  .footer-meta,
  .footer-bottom {
    align-items: flex-start;
    justify-content: flex-start;
  }

  .rd-visual {
    min-height: 260px;
  }

  .rd-visual-frame {
    min-height: 260px;
  }

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

  .rd-system-card:nth-child(2n) {
    border-right: 0;
  }

  .rd-system-card {
    border-bottom: 1px solid var(--line);
  }

  .rd-system-card:nth-last-child(-n + 2) {
    border-bottom: 0;
  }
}

@media (max-width: 560px) {
  .nav-shell,
  .container,
  .hero-content {
    width: min(calc(100% - 24px), var(--max));
    max-width: calc(100vw - 24px);
  }

  .brand-sub {
    display: none;
  }

  .brand {
    gap: 10px;
    min-width: 0;
  }

  .brand-logo {
    width: 116px;
  }

  .brand-name {
    font-size: 14px;
  }

  .section {
    padding: 56px 0;
  }

  .page-hero {
    padding: 128px 0 48px;
  }

  .page-hero h1 {
    max-width: 100%;
    font-size: clamp(30px, 8.5vw, 38px);
  }

  .page-hero p,
  .section-head,
  .muted {
    max-width: 100%;
  }

  .page-hero h1,
  .page-hero p,
  .section p,
  .card p,
  .contact-channel dd {
    word-break: break-all;
  }

  .hero h1 {
    font-size: 40px;
  }

  .hero-actions,
  .button {
    width: 100%;
  }

  .cta-band {
    padding: 24px;
  }

  .contact-channel dl div {
    grid-template-columns: 1fr;
  }

  .rd-hero {
    padding: 62px 0 52px;
  }

  .rd-visual {
    min-height: 228px;
  }

  .rd-visual-frame {
    min-height: 228px;
  }

  .rd-target-box {
    top: 74px;
    left: 42px;
    width: 96px;
    height: 112px;
  }

  .rd-target-dot {
    top: 123px;
    left: 82px;
  }

  .rd-track-line {
    top: 130px;
    right: 82px;
    left: 134px;
  }

  .rd-stabilizer {
    right: 34px;
    bottom: 36px;
    width: 78px;
    height: 78px;
  }

  .rd-chip {
    font-size: 12px;
  }

  .rd-chip-primary {
    top: 34px;
    left: 28px;
  }

  .rd-chip-secondary {
    right: 28px;
    bottom: 134px;
  }

  .rd-system {
    grid-template-columns: 1fr;
  }

  .rd-system-card,
  .rd-system-card:nth-child(2n),
  .rd-system-card:nth-last-child(-n + 2) {
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .rd-system-card:last-child {
    border-bottom: 0;
  }
}