:root {
  --brand: #37c6c1;
  --brand-soft: rgba(55, 198, 193, .12);
  --brand-mid: rgba(55, 198, 193, .34);
  --ink: #21484b;
  --muted: #5d6b70;
  --line: #dce7e7;
  --paper: #ffffff;
  --wash: #f4faf9;
  --deep: #e8f8f7;
  --shadow: 0 18px 50px rgba(20, 38, 42, .12);
  font-family: "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--paper);
  line-height: 1.6;
}

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

.container {
  width: min(1320px, calc(100% - 48px));
  margin: 0 auto;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, .92);
  border-bottom: 1px solid rgba(220, 231, 231, .8);
  backdrop-filter: blur(18px);
}

.nav-wrap {
  width: min(1380px, calc(100% - 32px));
  min-height: 72px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  font-weight: 800;
  white-space: nowrap;
}

.brand-mark {
  padding:0 10px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  color: #fff;
  background: var(--brand);
  letter-spacing: 0;
}

.site-menu {
  display: flex;
  align-items: center;
  gap: 8px;
}

.site-menu a {
  padding: 10px 10px;
  border-radius: 8px;
  font-size: 13px;
  color: #314145;
  white-space: nowrap;
  transition: background .22s ease, color .22s ease;
}

.site-menu a:hover {
  color: var(--ink);
  background: var(--brand-soft);
}

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

.menu-toggle {
  display: none;
  width: 42px;
  height: 42px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.menu-toggle span {
  display: block;
  width: 19px;
  height: 2px;
  margin: 4px auto;
  background: var(--ink);
  transition: transform .22s ease, opacity .22s ease;
}

.section {
  padding: 96px 0;
  scroll-margin-top: 84px;
}

.hero {
  position: relative;
  min-height: 720px;
  display: flex;
  align-items: center;
  overflow: hidden;
}

/* CSS 生成 mock 占位图，避免引入文档外业务图片信息。 */
.hero-bg {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(255,255,255,.96), rgba(255,255,255,.72) 48%, rgba(255,255,255,.34)),
    radial-gradient(circle at 77% 26%, rgba(55,198,193,.34), transparent 32%),
    linear-gradient(135deg, #eef8f7, #ffffff 46%, #dff5f4);
  background: linear-gradient(to right, rgb(255 255 255), transparent)
}

.hero-bg::after {
  content: "";
  position: absolute;
  right: max(24px, calc((100vw - 1180px) / 2));
  bottom: 80px;
  width: min(520px, 46vw);
  aspect-ratio: 4 / 3;
  border-radius: 8px;
  background:
    linear-gradient(135deg, rgba(55,198,193,.28), rgba(255,255,255,.5)),
    repeating-linear-gradient(90deg, rgba(23,35,40,.07) 0 1px, transparent 1px 46px);
  box-shadow: var(--shadow);
}

.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 58px;
  align-items: center;
}

.eyebrow {
  margin: 0 0 14px;
  color: #237f7c;
  font-size: 14px;
  font-weight: 800;
}

h1,
h2,
h3,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 20px;
  font-size: clamp(44px, 4.4vw, 68px);
  line-height: 1.04;
  letter-spacing: 0;
  white-space: nowrap;
}

h2 {
  margin-bottom: 18px;
  font-size: clamp(28px, 2.55vw, 40px);
  line-height: 1.18;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 12px;
  font-size: 20px;
  line-height: 1.35;
}

.hero-lead {
  max-width: 680px;
  color: #425156;
  font-size: clamp(18px, 2vw, 24px);
  white-space: nowrap;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 32px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 22px;
  border: 1px solid var(--brand);
  border-radius: 8px;
  font-weight: 800;
  cursor: pointer;
  transition: transform .22s ease, box-shadow .22s ease, background .22s ease;
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 12px 26px rgba(55, 198, 193, .25);
}

.btn.primary {
  color: #fff;
  background: var(--brand);
}

.btn.ghost {
  color: #237f7c;
  background: rgba(255,255,255,.7);
}

.hero-panel {
  position: relative;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
  padding: 22px;
  border: 1px solid rgba(55, 198, 193, .28);
  border-radius: 8px;
  background: rgba(255,255,255,.82);
  box-shadow: var(--shadow);
  backdrop-filter: blur(16px);
}

.metric {
  min-height: 130px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
}

.metric.wide {
  grid-column: 1 / -1;
}

.metric strong {
  display: block;
  color: #237f7c;
  font-size: clamp(28px, 4vw, 44px);
  line-height: 1;
}

.metric span {
  display: block;
  margin-top: 12px;
  color: var(--muted);
  white-space: nowrap;
}

.section-head {
  max-width: 980px;
  margin-bottom: 38px;
}

.section-head h2,
.split h2,
.contact h2,
.case-card h2 {
  white-space: nowrap;
  max-width: 100%;
}

.pain-grid,
.value-grid,
.disc-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 20px;
}

.card,
.value-block,
.disc-item,
.risk-card,
.case-card,
.lead-form {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 10px 28px rgba(20, 38, 42, .06);
}

.card {
  padding: 26px;
  transition: transform .22s ease, border-color .22s ease;
}

.card:hover {
  transform: translateY(-5px);
  border-color: var(--brand);
}

.icon {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  margin-bottom: 20px;
  border-radius: 8px;
  color: #fff;
  background: var(--brand);
  font-weight: 900;
}

.card p,
.value-block li,
.risk-card li,
.disc-item span,
.case-copy p {
  color: var(--muted);
}

.tinted {
  background: var(--wash);
}

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

.value-block {
  padding: 30px;
}

ul {
  padding-left: 20px;
  margin: 0;
}

li + li {
  margin-top: 10px;
}

.architecture {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
  background: #fff;
  box-shadow: var(--shadow);
}

.architecture article {
  padding: 28px;
  min-height: 420px;
  border-right: 1px solid var(--line);
}

.architecture article:last-child {
  border-right: 0;
}

.arch-icon {
  width: 58px;
  height: 52px;
  display: grid;
  place-items: center;
  margin-bottom: 22px;
  border-radius: 8px;
  color: #fff;
  background: var(--brand);
  font-weight: 900;
}

.architecture p {
  margin-bottom: 12px;
  color: var(--muted);
}

.dark {
  color: var(--ink);
  background: var(--deep);
}

.dark .eyebrow {
  color: #237f7c;
}

.risk-layout {
  display: grid;
  grid-template-columns: 1fr .9fr;
  gap: 24px;
}

.risk-columns {
  display: grid;
  gap: 18px;
}

.risk-card {
  padding: 24px;
  color: var(--ink);
}

.steps {
  padding: 28px;
  border: 1px solid var(--brand-mid);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 10px 28px rgba(20, 38, 42, .06);
}

.steps ol {
  padding: 0;
  margin: 0;
  list-style: none;
}

.steps li {
  display: grid;
  grid-template-columns: 106px 1fr;
  gap: 18px;
  padding: 18px 0;
  border-top: 1px solid var(--line);
}

.steps strong {
  color: #237f7c;
}

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

.split {
  display: grid;
  grid-template-columns: minmax(700px, .9fr) minmax(0, 1.1fr);
  gap: 42px;
  align-items: start;
}

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

.disc-item {
  padding: 24px;
}

.disc-item strong,
.disc-item span {
  display: block;
}

.disc-item strong {
  margin-bottom: 8px;
  color: #237f7c;
  font-size: 19px;
  white-space: nowrap;
}

.section-visual {
  position: relative;
  margin: 44px 0 0;
  border: 1px solid var(--brand-mid);
  border-radius: 8px;
  overflow: hidden;
  background: #fff;
  box-shadow: var(--shadow);
  z-index: 0;
}

.section-visual img {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.disc-visual {
  height: clamp(300px, 30vw, 410px);
}

.contact-visual {
  height: clamp(340px, 31vw, 480px);
}

.industry-list {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 14px;
}

.industry-list span {
  min-height: 58px;
  display: grid;
  place-items: center;
  padding: 12px;
  border: 1px solid var(--brand-mid);
  border-radius: 8px;
  background: #fff;
  font-weight: 800;
  text-align: center;
}

.case-card {
  display: grid;
  grid-template-columns: .8fr 1.2fr;
  gap: 28px;
  padding: 38px;
  border-color: var(--brand-mid);
}

.contact {
  background:
    linear-gradient(135deg, rgba(55,198,193,.16), transparent 38%),
    var(--wash);
}

.contact-grid {
  display: grid;
  grid-template-columns: minmax(540px, .95fr) minmax(0, 1.05fr);
  gap: 42px;
  align-items: start;
}

.lead-form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 18px;
  padding: 28px;
}
@media (min-width: 1024px) {
  .lead-form {
    margin-top:100px
  }
}

.lead-form label,
.lead-form fieldset {
  display: grid;
  gap: 8px;
  color: #334448;
  font-weight: 800;
  white-space: nowrap;
}

.lead-form input,
.lead-form select {
  width: 100%;
  min-height: 46px;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0 12px;
  color: var(--ink);
  font: inherit;
  background: #fff;
  outline: none;
  transition: border-color .2s ease, box-shadow .2s ease;
}

.lead-form input:focus,
.lead-form select:focus {
  border-color: var(--brand);
  box-shadow: 0 0 0 4px var(--brand-soft);
}

.lead-form fieldset {
  grid-column: 1 / -1;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 16px;
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
}

.lead-form fieldset legend {
  grid-column: 1 / -1;
  font-weight: 800;
  padding: 0;
  margin-bottom: 8px;
}

.lead-form fieldset label {
  display: flex;
  align-items: center;
  font-weight: 500;
}

.lead-form input[type="checkbox"] {
  width: 18px;
  height: 18px;
  min-height: 18px;
  accent-color: var(--brand);
}

.form-message {
  grid-column: 1 / -1;
  min-height: 24px;
  margin: 0;
  color: orangered;
  font-weight: 800;
}

.submit {
  grid-column: 1 / -1;
}

.site-footer {
  padding: 28px 0;
  color: #fff;
  background: var(--brand);
}

.site-footer .container {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  flex-wrap: wrap;
}

.site-footer a {
  color: #fff;
  font-weight: 900;
}

.reveal {
  opacity: 0;
  transform: translateY(18px);
  transition: opacity .6s ease, transform .6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

@media (max-width: 1180px) {
  .split,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  .disc-visual,
  .contact-visual {
    max-width: 760px;
  }

  .section-head h2,
  .split h2,
  .contact h2,
  .case-card h2 {
    white-space: normal;
  }
}

@media (max-width: 1100px) {
  .menu-toggle {
    display: block;
  }

  .site-menu {
    position: absolute;
    top: 72px;
    left: 14px;
    right: 14px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 12px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #fff;
    box-shadow: var(--shadow);
  }

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

  .site-menu a {
    min-height: 44px;
    display: flex;
    align-items: center;
    white-space: normal;
  }

  .menu-toggle.open span:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
  }

  .menu-toggle.open span:nth-child(2) {
    opacity: 0;
  }

  .menu-toggle.open span:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
  }
}

@media (max-width: 980px) {
  .section {
    padding: 74px 0;
  }

  .hero {
    min-height: auto;
    padding: 110px 0 76px;
  }

  .hero-grid,
  .risk-layout,
  .split,
  .case-card,
  .contact-grid {
    grid-template-columns: 1fr;
  }

  h1,
  .hero-lead,
  .section-head h2,
  .split h2,
  .contact h2,
  .case-card h2,
  .disc-item strong,
  .metric span,
  .lead-form label,
  .lead-form fieldset {
    white-space: normal;
  }

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

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

  .architecture article {
    min-height: auto;
    border-right: 0;
    border-bottom: 1px solid var(--line);
  }

  .architecture article:nth-last-child(-n+2) {
    border-bottom: 0;
  }
}

@media (max-width: 760px) {
  .container,
  .nav-wrap {
    width: min(100% - 28px, 1180px);
  }

  .menu-toggle {
    display: block;
  }

  .site-menu {
    position: absolute;
    top: 72px;
    left: 14px;
    right: 14px;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 12px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #fff;
    box-shadow: var(--shadow);
  }

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

  .site-menu a {
    min-height: 44px;
    display: flex;
    align-items: center;
    white-space: normal;
  }

  .menu-toggle.open span:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
  }

  .menu-toggle.open span:nth-child(2) {
    opacity: 0;
  }

  .menu-toggle.open span:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
  }

  .hero-panel,
  .pain-grid,
  .architecture,
  .disc-grid,
  .industry-list,
  .lead-form {
    grid-template-columns: 1fr;
  }

  .metric.wide {
    grid-column: auto;
  }

  .hero-actions {
    flex-direction: column;
  }

  .btn {
    width: 100%;
  }

  .steps li {
    grid-template-columns: 1fr;
    gap: 6px;
  }

  .architecture article:nth-last-child(-n+2) {
    border-bottom: 1px solid var(--line);
  }

  .architecture article:last-child {
    border-bottom: 0;
  }

  .lead-form label,
  .lead-form fieldset,
  .form-message,
  .submit {
    grid-column: 1;
  }

  .lead-form fieldset {
    grid-template-columns: 1fr;
  }

  .disc-visual,
  .contact-visual {
    height: 260px;
  }
}

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

  *,
  *::before,
  *::after {
    transition: none !important;
  }
}