:root {
  --ink: #111722;
  --muted: #637083;
  --soft: #8b98aa;
  --canvas: #f5f8fb;
  --card: #ffffff;
  --line: #d9e3ee;
  --line-strong: #bdcadd;
  --teal: #087f6f;
  --teal-strong: #056b5e;
  --teal-soft: #e6f5f2;
  --blue: #2f6bdc;
  --blue-soft: #edf4ff;
  --shadow: 0 22px 60px rgba(18, 32, 52, 0.1);
  color: var(--ink);
  font-family:
    Inter,
    "SF Pro Display",
    "SF Pro Text",
    "PingFang SC",
    "Microsoft YaHei",
    system-ui,
    sans-serif;
  background: var(--canvas);
  letter-spacing: 0;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background:
    radial-gradient(circle at 12% 4%, rgba(8, 127, 111, 0.08), transparent 30%),
    radial-gradient(circle at 88% 12%, rgba(47, 107, 220, 0.08), transparent 30%),
    linear-gradient(180deg, #fbfcfd 0%, #f4f8fb 44%, #eef4f8 100%);
  color: var(--ink);
  -webkit-font-smoothing: antialiased;
  text-rendering: geometricPrecision;
}

a {
  color: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr) auto;
  align-items: center;
  gap: 28px;
  width: min(1180px, calc(100% - 40px));
  min-height: 72px;
  margin: 0 auto;
  border-bottom: 1px solid rgba(217, 227, 238, 0.78);
  background: rgba(247, 250, 252, 0.84);
  backdrop-filter: blur(18px);
}

.brand,
.nav-cta,
.primary-button,
.secondary-button {
  text-decoration: none;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  min-width: 0;
}

.brand-mark {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: var(--ink);
  color: #ffffff;
  font-size: 22px;
  font-weight: 850;
  box-shadow: 0 14px 32px rgba(17, 23, 34, 0.16);
}

.brand strong,
.brand small {
  display: block;
  white-space: nowrap;
}

.brand strong {
  font-size: 16px;
  line-height: 1.2;
}

.brand small {
  margin-top: 2px;
  color: var(--soft);
  font-size: 11px;
  font-weight: 760;
}

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

.site-nav a {
  min-height: 36px;
  display: inline-flex;
  align-items: center;
  padding: 0 12px;
  border-radius: 8px;
  color: #405065;
  font-size: 14px;
  font-weight: 780;
  text-decoration: none;
}

.site-nav a:hover {
  background: rgba(255, 255, 255, 0.9);
  color: var(--teal);
}

.nav-cta,
.primary-button,
.secondary-button {
  min-height: 42px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 860;
  white-space: nowrap;
}

.nav-cta {
  padding: 0 16px;
  border: 1px solid #cfe4e0;
  background: #ffffff;
  color: var(--teal);
}

.primary-button {
  padding: 0 20px;
  background: var(--teal);
  color: #ffffff;
  box-shadow: 0 18px 36px rgba(8, 127, 111, 0.2);
}

.primary-button:hover {
  background: var(--teal-strong);
}

.secondary-button {
  padding: 0 18px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.85);
  color: #243044;
}

.hero,
.section,
.architecture,
.closing,
.value-strip {
  width: min(1180px, calc(100% - 40px));
  margin-inline: auto;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.92fr) minmax(540px, 1.08fr);
  gap: 48px;
  align-items: center;
  min-height: 760px;
  padding: 54px 0 44px;
}

.hero-copy h1 {
  max-width: 640px;
  margin: 0;
  color: var(--ink);
  font-size: clamp(42px, 5.3vw, 72px);
  font-weight: 900;
  line-height: 1.03;
}

.hero-copy p {
  max-width: 570px;
  margin: 26px 0 0;
  color: var(--muted);
  font-size: 18px;
  font-weight: 620;
  line-height: 1.72;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 32px;
}

.hero-points {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.hero-points span {
  min-height: 34px;
  display: inline-flex;
  align-items: center;
  padding: 0 12px;
  border: 1px solid #d8e9e5;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.78);
  color: var(--teal-strong);
  font-size: 13px;
  font-weight: 820;
}

.hero-visual {
  position: relative;
  min-width: 0;
  overflow: hidden;
  border: 1px solid #cedbe8;
  border-radius: 18px;
  background: linear-gradient(180deg, #ffffff 0%, #f8fbfd 100%);
  box-shadow: var(--shadow);
}

.window-bar {
  height: 42px;
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 18px;
  border-bottom: 1px solid #e2e9f1;
  background: #fbfcfe;
}

.window-bar span {
  width: 10px;
  height: 10px;
  border-radius: 999px;
}

.window-bar span:nth-child(1) {
  background: #ff5f57;
}

.window-bar span:nth-child(2) {
  background: #ffbd2e;
}

.window-bar span:nth-child(3) {
  background: #28c840;
}

.console-preview {
  display: grid;
  grid-template-columns: 142px minmax(0, 1fr);
  min-height: 500px;
}

.preview-nav {
  display: grid;
  align-content: start;
  gap: 10px;
  padding: 18px 12px;
  border-right: 1px solid #e2e9f1;
  background: #ffffff;
}

.preview-logo {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  margin-bottom: 10px;
  border-radius: 8px;
  background: var(--ink);
  color: #ffffff;
  font-weight: 850;
}

.preview-nav span {
  min-height: 36px;
  display: flex;
  align-items: center;
  padding: 0 10px;
  border-radius: 8px;
  color: #5c6a7c;
  font-size: 12px;
  font-weight: 820;
}

.preview-nav span.active {
  background: var(--teal-soft);
  color: var(--teal);
  box-shadow: inset 3px 0 0 var(--teal);
}

.preview-main {
  min-width: 0;
  padding: 20px;
}

.preview-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.preview-top strong {
  font-size: 18px;
}

.preview-top span {
  min-height: 30px;
  display: inline-flex;
  align-items: center;
  padding: 0 11px;
  border: 1px solid #cfe4e0;
  border-radius: 999px;
  background: #ffffff;
  color: var(--teal);
  font-size: 12px;
  font-weight: 840;
}

.preview-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.15fr) minmax(210px, 0.85fr);
  gap: 16px;
  margin-top: 18px;
}

.preview-form,
.preview-progress {
  display: grid;
  align-content: start;
  gap: 12px;
  min-width: 0;
  padding: 18px;
  border: 1px solid #dde6f0;
  border-radius: 12px;
  background: #ffffff;
}

.preview-form label {
  color: #2a3546;
  font-size: 12px;
  font-weight: 840;
}

.fake-input,
.fake-textarea {
  overflow: hidden;
  border: 1px solid #cfdae8;
  border-radius: 8px;
  background: #fbfcfe;
  color: #182233;
  font-size: 12px;
  font-weight: 720;
}

.fake-input {
  min-height: 42px;
  display: flex;
  align-items: center;
  padding: 0 12px;
  white-space: nowrap;
  text-overflow: ellipsis;
}

.fake-textarea {
  min-height: 100px;
  padding: 12px;
  line-height: 1.55;
}

.preview-form button {
  min-height: 44px;
  border: 0;
  border-radius: 8px;
  background: var(--teal);
  color: #ffffff;
  font: inherit;
  font-size: 14px;
  font-weight: 860;
}

.preview-progress strong {
  font-size: 16px;
}

.preview-progress em {
  color: var(--teal);
  font-size: 48px;
  font-style: normal;
  font-weight: 900;
  line-height: 0.9;
}

.progress-line {
  height: 8px;
  overflow: hidden;
  border-radius: 999px;
  background: #e3e9f0;
}

.progress-line span {
  width: 12%;
  height: 100%;
  display: block;
  border-radius: inherit;
  background: var(--teal);
}

.preview-progress ol {
  display: grid;
  gap: 10px;
  margin: 2px 0 0;
  padding: 0 0 0 22px;
  color: #253044;
  font-size: 12px;
  font-weight: 820;
}

.value-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.82);
  box-shadow: 0 14px 36px rgba(18, 32, 52, 0.06);
}

.value-strip div {
  display: grid;
  gap: 6px;
  padding: 14px;
}

.value-strip strong {
  font-size: 16px;
}

.value-strip span {
  color: var(--muted);
  font-size: 13px;
  font-weight: 680;
  line-height: 1.45;
}

.section,
.architecture {
  padding: 88px 0 0;
}

.section-heading {
  max-width: 720px;
  margin-bottom: 28px;
}

.section-heading h2,
.closing h2 {
  margin: 0;
  color: var(--ink);
  font-size: clamp(30px, 3vw, 46px);
  font-weight: 900;
  line-height: 1.12;
}

.section-heading p {
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 17px;
  font-weight: 620;
  line-height: 1.65;
}

.workflow {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 12px;
}

.workflow article,
.safety-grid article {
  min-width: 0;
  padding: 20px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.9);
  box-shadow: 0 14px 34px rgba(18, 32, 52, 0.05);
}

.workflow article span {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  margin-bottom: 18px;
  border-radius: 999px;
  background: var(--teal-soft);
  color: var(--teal);
  font-size: 13px;
  font-weight: 900;
}

.workflow strong,
.safety-grid strong {
  display: block;
  font-size: 17px;
  line-height: 1.35;
}

.workflow p,
.safety-grid p {
  margin: 10px 0 0;
  color: var(--muted);
  font-size: 14px;
  font-weight: 650;
  line-height: 1.62;
}

.architecture-frame {
  display: block;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 18px;
  background: #ffffff;
  box-shadow: var(--shadow);
}

.architecture-frame img {
  width: 100%;
  display: block;
}

.safety-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}

.closing {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 32px;
  margin-top: 88px;
  margin-bottom: 48px;
  padding: 36px;
  border: 1px solid #cfe4e0;
  border-radius: 18px;
  background:
    linear-gradient(135deg, rgba(8, 127, 111, 0.09), rgba(47, 107, 220, 0.06)),
    #ffffff;
  box-shadow: var(--shadow);
}

.closing h2 {
  max-width: 760px;
  font-size: clamp(28px, 3.2vw, 44px);
}

@media (max-width: 980px) {
  .site-header {
    grid-template-columns: 1fr auto;
  }

  .site-nav {
    display: none;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding-top: 48px;
  }

  .hero-visual {
    max-width: 720px;
  }

  .workflow,
  .safety-grid,
  .value-strip {
    grid-template-columns: 1fr 1fr;
  }
}

@media (max-width: 640px) {
  .site-header,
  .hero,
  .section,
  .architecture,
  .closing,
  .value-strip {
    width: min(100% - 28px, 1180px);
  }

  .site-header {
    min-height: 68px;
    gap: 14px;
  }

  .brand small,
  .nav-cta {
    display: none;
  }

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

  .hero-copy p {
    font-size: 16px;
  }

  .hero-actions {
    display: grid;
  }

  .console-preview,
  .preview-grid,
  .workflow,
  .safety-grid,
  .value-strip,
  .closing {
    grid-template-columns: 1fr;
  }

  .preview-nav {
    display: none;
  }

  .preview-main {
    padding: 16px;
  }

  .preview-top {
    display: grid;
  }

  .section,
  .architecture {
    padding-top: 64px;
  }

  .closing {
    display: grid;
    padding: 24px;
  }
}