:root {
  color-scheme: light;
  --ink: #172033;
  --muted: #5f6b7a;
  --soft: #eef3f7;
  --paper: #ffffff;
  --line: #d8e0e7;
  --blue: #1d5fd1;
  --blue-dark: #174a9f;
  --green: #158466;
  --teal: #0f8b9a;
  --amber: #b86b12;
  --red: #c23b30;
  --steel: #3f5266;
  --shadow: 0 18px 50px rgb(27 39 58 / 12%);
  --radius: 8px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family:
    Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: #f7f9fb;
}

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

button,
input,
textarea {
  font: inherit;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 72px;
  padding: 0 clamp(20px, 4vw, 56px);
  background: rgb(255 255 255 / 92%);
  border-bottom: 1px solid rgb(216 224 231 / 80%);
  backdrop-filter: blur(18px);
}

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

.brand-mark {
  display: grid;
  width: 38px;
  height: 38px;
  font-weight: 800;
  color: #fff;
  place-items: center;
  background: var(--blue);
  border-radius: var(--radius);
}

.brand strong,
.brand small {
  display: block;
}

.brand strong {
  font-size: 16px;
  line-height: 1.1;
}

.brand small {
  margin-top: 4px;
  font-size: 12px;
  color: var(--muted);
}

.site-nav {
  display: flex;
  gap: 4px;
  align-items: center;
}

.site-nav a {
  padding: 10px 13px;
  font-size: 14px;
  font-weight: 700;
  color: #3b4756;
  border-radius: var(--radius);
}

.site-nav a:hover {
  color: var(--blue);
  background: #eef4ff;
}

.site-nav .nav-cta {
  margin-left: 8px;
  color: #fff;
  background: var(--ink);
}

.site-nav .nav-cta:hover {
  color: #fff;
  background: var(--blue);
}

.nav-toggle {
  display: none;
  width: 42px;
  height: 42px;
  padding: 0;
  background: transparent;
  border: 0;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  margin: 5px auto;
  background: var(--ink);
}

.section-band {
  padding: clamp(68px, 9vw, 118px) clamp(20px, 5vw, 72px);
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 0.95fr) minmax(460px, 1.05fr);
  gap: clamp(34px, 6vw, 74px);
  align-items: center;
  min-height: calc(100vh - 72px);
  background:
    linear-gradient(90deg, rgb(247 249 251 / 96%), rgb(247 249 251 / 88%)),
    repeating-linear-gradient(
      0deg,
      transparent 0,
      transparent 38px,
      rgb(216 224 231 / 58%) 39px,
      transparent 40px
    ),
    repeating-linear-gradient(
      90deg,
      transparent 0,
      transparent 38px,
      rgb(216 224 231 / 58%) 39px,
      transparent 40px
    );
}

.eyebrow {
  margin: 0 0 14px;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--blue);
}

h1,
h2,
h3,
p {
  letter-spacing: 0;
}

h1 {
  max-width: 780px;
  margin: 0;
  font-size: clamp(42px, 5vw, 70px);
  line-height: 1.06;
}

h2 {
  margin: 0;
  font-size: clamp(30px, 3.4vw, 48px);
  line-height: 1.16;
}

h3 {
  margin: 0;
  font-size: 20px;
  line-height: 1.35;
}

.hero-lede,
.section-head p,
.scenario-copy p,
.contact-panel p {
  font-size: 18px;
  line-height: 1.8;
  color: var(--muted);
}

.hero-lede {
  max-width: 680px;
  margin: 24px 0 0;
}

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

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 150px;
  height: 46px;
  padding: 0 20px;
  font-size: 15px;
  font-weight: 800;
  border: 1px solid transparent;
  border-radius: var(--radius);
}

.button.primary {
  color: #fff;
  background: var(--blue);
  box-shadow: 0 10px 24px rgb(29 95 209 / 24%);
}

.button.primary:hover {
  background: var(--blue-dark);
}

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

.button.secondary:hover {
  border-color: #b8c5d0;
}

.trust-strip {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
  max-width: 720px;
  margin: 42px 0 0;
}

.trust-strip div {
  padding-left: 16px;
  border-left: 3px solid var(--green);
}

.trust-strip dt {
  font-size: 18px;
  font-weight: 900;
}

.trust-strip dd {
  margin: 8px 0 0;
  font-size: 13px;
  color: var(--muted);
}

.hero-visual {
  position: relative;
  min-height: 560px;
}

.operations-board {
  width: min(100%, 720px);
  padding: 24px;
  margin-left: auto;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.board-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.board-top span {
  font-size: 22px;
  font-weight: 900;
}

.board-top strong {
  padding: 7px 10px;
  font-size: 13px;
  color: var(--green);
  background: #e8f5f1;
  border-radius: var(--radius);
}

.metric-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 18px;
}

.metric-grid div {
  padding: 18px;
  background: #f4f7fa;
  border: 1px solid #e1e8ef;
  border-radius: var(--radius);
}

.metric-grid span,
.mini-table span {
  display: block;
  font-size: 13px;
  color: var(--muted);
}

.metric-grid strong {
  display: block;
  margin-top: 8px;
  font-size: 36px;
  line-height: 1;
}

.process-lane {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 10px;
  margin-top: 18px;
}

.process-lane span {
  display: grid;
  height: 62px;
  font-size: 14px;
  font-weight: 800;
  color: #536173;
  place-items: center;
  background: #f4f7fa;
  border: 1px solid #e1e8ef;
  border-radius: var(--radius);
}

.process-lane .done {
  color: var(--green);
  background: #e8f5f1;
  border-color: #b9ddd1;
}

.process-lane .active {
  color: var(--blue);
  background: #edf4ff;
  border-color: #bfd5ff;
}

.mini-table {
  margin-top: 18px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.mini-table div {
  display: grid;
  grid-template-columns: 1fr 1fr 92px;
  gap: 12px;
  align-items: center;
  min-height: 58px;
  padding: 0 16px;
  border-top: 1px solid #edf1f5;
}

.mini-table div:first-child {
  border-top: 0;
}

.mini-table b {
  font-size: 14px;
}

.mini-table em {
  justify-self: start;
  padding: 5px 8px;
  font-size: 12px;
  font-style: normal;
  font-weight: 800;
  color: var(--amber);
  background: #fff2df;
  border-radius: var(--radius);
}

.section-head {
  max-width: 920px;
  margin-bottom: 34px;
}

.section-head.narrow {
  max-width: 760px;
  margin-right: auto;
  margin-left: auto;
  text-align: center;
}

.problems {
  background: #fff;
}

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

.problem-list article,
.module-item,
.delivery-grid article {
  padding: 24px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.problem-list article {
  min-height: 190px;
  background: #f8fafc;
}

.problem-list span {
  display: inline-block;
  margin-bottom: 28px;
  font-size: 13px;
  font-weight: 900;
  color: var(--red);
}

.problem-list p,
.module-item p,
.delivery-grid p,
.timeline p {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

.system {
  background:
    linear-gradient(90deg, rgb(239 244 248 / 94%), rgb(246 249 251 / 98%)),
    repeating-linear-gradient(
      135deg,
      rgb(216 224 231 / 60%) 0,
      rgb(216 224 231 / 60%) 1px,
      transparent 1px,
      transparent 18px
    );
}

.flow-map {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  max-width: 1040px;
  min-height: 520px;
  margin: 34px auto 0;
}

.flow-node {
  padding: 28px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: 0 12px 30px rgb(27 39 58 / 8%);
}

.flow-node strong {
  display: block;
  font-size: 24px;
}

.flow-node span {
  display: block;
  max-width: 280px;
  margin-top: 12px;
  line-height: 1.7;
  color: var(--muted);
}

.flow-center {
  position: absolute;
  top: 50%;
  left: 50%;
  display: grid;
  width: 300px;
  height: 180px;
  padding: 24px;
  text-align: center;
  place-items: center;
  background: var(--ink);
  border: 6px solid #fff;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  transform: translate(-50%, -50%);
}

.flow-center span {
  font-size: 14px;
  font-weight: 800;
  color: #a9c5ff;
}

.flow-center strong {
  display: block;
  margin-top: 10px;
  font-size: 28px;
  line-height: 1.2;
  color: #fff;
}

.modules {
  background: #fff;
}

.module-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.module-item {
  display: block;
  min-height: 336px;
  transition:
    border-color 160ms ease,
    box-shadow 160ms ease,
    transform 160ms ease;
}

.module-item:hover {
  border-color: #b8c7d8;
  box-shadow: 0 16px 36px rgb(27 39 58 / 10%);
  transform: translateY(-2px);
}

.module-item.highlight {
  color: #fff;
  background: var(--steel);
  border-color: var(--steel);
}

.module-item.highlight p,
.module-item.highlight li {
  color: #dce6f0;
}

.module-index {
  display: grid;
  width: 38px;
  height: 38px;
  margin-bottom: 28px;
  font-weight: 900;
  color: var(--blue);
  place-items: center;
  background: #edf4ff;
  border-radius: var(--radius);
}

.module-item.highlight .module-index {
  color: var(--steel);
  background: #fff;
}

.module-item ul {
  padding: 0;
  margin: 20px 0 0;
  list-style: none;
}

.module-item li {
  position: relative;
  padding-left: 18px;
  margin-top: 10px;
  font-size: 14px;
  color: #4f5f70;
}

.module-item li::before {
  position: absolute;
  top: 0.72em;
  left: 0;
  width: 6px;
  height: 6px;
  content: "";
  background: var(--green);
  border-radius: 50%;
}

.text-link {
  display: inline-flex;
  margin-top: 24px;
  font-size: 14px;
  font-weight: 900;
  color: var(--blue);
}

.module-item.highlight .text-link {
  color: #fff;
}

.capability-strip {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.capability-strip span {
  padding: 10px 13px;
  font-size: 14px;
  font-weight: 800;
  color: #425166;
  background: #f3f6f9;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.capability-strip.center {
  justify-content: center;
}

.detail-hero {
  display: grid;
  grid-template-columns: minmax(0, 0.96fr) minmax(420px, 0.84fr);
  gap: clamp(34px, 6vw, 72px);
  align-items: center;
  min-height: calc(74vh - 72px);
  padding-top: clamp(56px, 7vw, 92px);
  padding-bottom: clamp(56px, 7vw, 92px);
  background:
    linear-gradient(90deg, rgb(247 249 251 / 96%), rgb(247 249 251 / 88%)),
    repeating-linear-gradient(
      0deg,
      transparent 0,
      transparent 38px,
      rgb(216 224 231 / 58%) 39px,
      transparent 40px
    );
}

.page-hero {
  min-height: 58vh;
  padding-top: clamp(76px, 10vw, 140px);
  padding-bottom: clamp(64px, 9vw, 120px);
  background:
    linear-gradient(90deg, rgb(247 249 251 / 96%), rgb(247 249 251 / 88%)),
    repeating-linear-gradient(
      0deg,
      transparent 0,
      transparent 38px,
      rgb(216 224 231 / 58%) 39px,
      transparent 40px
    );
}

.page-hero h1 {
  max-width: 960px;
}

.detail-card {
  padding: 24px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.detail-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 18px;
  border-bottom: 1px solid var(--line);
}

.detail-card-head strong {
  font-size: 22px;
}

.detail-card-head span {
  padding: 7px 10px;
  font-size: 13px;
  font-weight: 900;
  color: var(--amber);
  background: #fff2df;
  border-radius: var(--radius);
}

.order-progress {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 8px;
  margin-top: 18px;
}

.order-progress i {
  display: grid;
  min-height: 54px;
  font-size: 13px;
  font-style: normal;
  font-weight: 900;
  color: #596778;
  place-items: center;
  background: #f3f6f9;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.order-progress .done {
  color: var(--green);
  background: #e8f5f1;
  border-color: #b9ddd1;
}

.order-progress .active {
  color: var(--blue);
  background: #edf4ff;
  border-color: #bfd5ff;
}

.detail-metrics {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin: 18px 0 0;
}

.detail-metrics div {
  padding: 16px;
  background: #f8fafc;
  border: 1px solid #e4ebf1;
  border-radius: var(--radius);
}

.detail-metrics dt {
  font-size: 13px;
  color: var(--muted);
}

.detail-metrics dd {
  margin: 8px 0 0;
  font-size: 20px;
  font-weight: 900;
}

.detail-section {
  background: #fff;
}

.detail-section.muted {
  background: #f3f6f9;
}

.detail-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.detail-grid article {
  min-height: 210px;
  padding: 26px;
  background: #f8fafc;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.detail-grid p {
  margin: 12px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

.feature-table {
  max-width: 980px;
  margin: 0 auto;
  overflow: hidden;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.feature-table div {
  display: grid;
  grid-template-columns: 210px 1fr;
  gap: 18px;
  align-items: center;
  min-height: 72px;
  padding: 18px 22px;
  border-top: 1px solid #edf1f5;
}

.feature-table div:first-child {
  border-top: 0;
}

.feature-table span {
  color: var(--muted);
}

.ledger-list {
  margin-top: 18px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.ledger-list p,
.stock-row {
  display: grid;
  grid-template-columns: 80px 1fr;
  gap: 14px;
  align-items: center;
  min-height: 54px;
  padding: 0 16px;
  margin: 0;
  border-top: 1px solid #edf1f5;
}

.ledger-list p:first-child,
.stock-row:first-of-type {
  border-top: 0;
}

.ledger-list span {
  color: var(--muted);
}

.process-detail {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 12px;
  max-width: 980px;
  margin: 0 auto;
}

.process-detail span {
  display: grid;
  min-height: 92px;
  font-weight: 900;
  color: var(--blue);
  place-items: center;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.warehouse-card {
  display: grid;
  gap: 0;
}

.stock-row {
  grid-template-columns: 1fr 120px 100px;
}

.stock-row span {
  color: var(--muted);
}

.stock-row em {
  justify-self: end;
  font-style: normal;
  font-weight: 900;
  color: var(--green);
}

.stock-row.warn em {
  color: var(--red);
}

.article-section,
.about-section {
  background: #fff;
}

.article-grid,
.about-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 18px;
}

.article-card,
.about-grid article {
  padding: 28px;
  background: #f8fafc;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.article-card span {
  display: inline-flex;
  margin-bottom: 18px;
  font-size: 13px;
  font-weight: 900;
  color: var(--blue);
}

.article-card h2,
.about-grid h2 {
  font-size: 24px;
  line-height: 1.3;
}

.article-card p,
.about-grid p {
  margin: 14px 0 0;
  font-size: 15px;
  line-height: 1.75;
  color: var(--muted);
}

.article-card a {
  display: inline-flex;
  margin-top: 22px;
  font-size: 14px;
  font-weight: 900;
  color: var(--blue);
}

.scenario {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 44px;
  align-items: start;
  background: #f3f6f9;
}

.scenario-copy {
  position: sticky;
  top: 108px;
}

.timeline {
  display: grid;
  gap: 14px;
}

.timeline div {
  display: grid;
  grid-template-columns: 88px 170px 1fr;
  gap: 18px;
  align-items: center;
  min-height: 104px;
  padding: 20px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
}

.timeline span {
  font-size: 13px;
  font-weight: 900;
  color: var(--blue);
}

.timeline strong {
  font-size: 19px;
}

.timeline p {
  margin: 0;
}

.delivery {
  background: #fff;
}

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

.delivery-grid article {
  border-top: 4px solid var(--teal);
}

.contact {
  background: #f3f6f9;
}

.contact-panel {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 340px;
  gap: 34px;
  align-items: center;
  max-width: 1120px;
  padding: clamp(28px, 5vw, 54px);
  margin: 0 auto;
  color: #fff;
  background: var(--ink);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.contact-panel .eyebrow {
  color: #93c5fd;
}

.contact-panel p {
  color: #d7e0eb;
}

.contact-actions {
  display: grid;
  gap: 12px;
}

.contact-actions .button.secondary {
  color: #fff;
  background: transparent;
  border-color: #6b7d93;
}

.contact-actions p {
  margin: 4px 0 0;
  font-size: 13px;
  line-height: 1.6;
}

.site-footer {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
  justify-content: space-between;
  padding: 26px clamp(20px, 5vw, 72px);
  font-size: 13px;
  color: var(--muted);
  background: #fff;
  border-top: 1px solid var(--line);
}

@media (max-width: 1080px) {
  .hero,
  .detail-hero,
  .scenario,
  .contact-panel {
    grid-template-columns: 1fr;
  }

  .hero-visual {
    min-height: auto;
  }

  .operations-board {
    margin-left: 0;
  }

  .problem-list,
  .detail-grid,
  .article-grid,
  .about-grid,
  .delivery-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .scenario-copy {
    position: static;
  }
}

@media (max-width: 780px) {
  .site-header {
    min-height: 64px;
  }

  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    top: 64px;
    right: 16px;
    left: 16px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 12px;
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
  }

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

  .site-nav .nav-cta {
    margin-left: 0;
  }

  .section-band {
    padding: 56px 18px;
  }

  .hero {
    min-height: auto;
    padding-top: 46px;
  }

  h1 {
    font-size: 38px;
  }

  h2 {
    font-size: 30px;
  }

  .hero-lede,
  .section-head p,
  .scenario-copy p,
  .contact-panel p {
    font-size: 16px;
  }

  .trust-strip,
  .metric-grid,
  .problem-list,
  .module-grid,
  .detail-grid,
  .article-grid,
  .about-grid,
  .delivery-grid {
    grid-template-columns: 1fr;
  }

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

  .mini-table div {
    grid-template-columns: 1fr;
    gap: 6px;
    padding: 14px;
  }

  .flow-map {
    grid-template-columns: 1fr;
    min-height: auto;
  }

  .flow-center {
    position: static;
    width: auto;
    height: auto;
    transform: none;
  }

  .timeline div {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .detail-hero {
    min-height: auto;
    padding-top: 46px;
  }

  .order-progress,
  .detail-metrics,
  .process-detail {
    grid-template-columns: 1fr;
  }

  .feature-table div,
  .stock-row {
    grid-template-columns: 1fr;
    gap: 8px;
  }

  .stock-row em {
    justify-self: start;
  }
}