:root {
  --ink: #202936;
  --muted: #687482;
  --accent: #245e85;
  --line: #e5e9ed;
  --soft: #f6f8fa;
}
* {
  box-sizing: border-box;
}
html {
  scroll-behavior: smooth;
  scroll-padding-top: 90px;
}
body {
  margin: 0;
  color: var(--ink);
  background: #fff;
  font-size: 14px;
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Microsoft YaHei", sans-serif;
  font-weight: 400;
  -webkit-font-smoothing: antialiased;
}
button,
input,
select,
textarea {
  font: inherit;
}
a {
  color: inherit;
  text-decoration: none;
}
button,
a,
input,
select,
textarea {
  -webkit-tap-highlight-color: transparent;
}
:focus-visible {
  outline: 2px solid #7e8c97;
  outline-offset: 4px;
}
button {
  cursor: pointer;
}
h1,
h2,
h3,
p {
  margin-top: 0;
}
h1,
h2,
h3 {
  font-weight: 600;
  text-wrap: balance;
}
.site-header {
  height: 76px;
  padding: 0 max(24px, calc((100% - 1180px) / 2));
  display: flex;
  align-items: center;
  gap: 40px;
  background: white;
}
.site-header nav {
  display: flex;
  gap: 36px;
  flex: 1;
  font-size: 15px;
  font-weight: 500;
}
.site-header nav a:hover,
.login:hover {
  color: var(--accent);
}
.header-actions {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 14px;
}
.button {
  display: inline-flex;
  justify-content: center;
  align-items: center;
  min-height: 46px;
  padding: 12px 24px;
  border: 1px solid transparent;
  border-radius: 5px;
  background: var(--accent);
  color: white;
  font-size: 15px;
  font-weight: 600;
  transition: background 0.2s;
}
.button:hover {
  background: #1b4c6d;
}
.small {
  min-height: 38px;
  padding: 8px 18px;
}
.menu-button {
  display: none;
  border: 0;
  background: none;
  font-size: 24px;
  color: var(--ink);
}
.hero {
  height: 580px;
  position: relative;
  overflow: hidden;
  background: #203644;
  color: #fff;
}
.hero-slide {
  position: absolute;
  inset: 0;
  visibility: hidden;
  opacity: 0;
  transition: opacity 0.65s;
}
.hero-slide.active {
  visibility: visible;
  opacity: 1;
  z-index: 1;
}
.hero-slide > img {
  width: 100%;
  height: 100%;
  position: absolute;
  object-fit: cover;
}
.shade {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    90deg,
    rgba(16, 35, 44, 0.9),
    rgba(16, 35, 44, 0.6) 42%,
    rgba(16, 35, 44, 0.05) 80%
  );
}
.factory-shade {
  background: linear-gradient(90deg, #142735ed, #14273599 45%, #14273522);
}
.hero-content {
  position: relative;
  max-width: 1180px;
  margin: auto;
  padding-top: 120px;
}
.kicker {
  font-size: 14px;
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 18px;
}
.hero .kicker {
  color: #d4e5ed;
}
.hero h1,
.hero h2 {
  max-width: 690px;
  font-size: 52px;
  line-height: 1.35;
  margin-bottom: 22px;
  font-weight: 650;
}
.hero-copy {
  max-width: 540px;
  font-size: 18px;
  line-height: 1.9;
  color: #e1e7eb;
}
.hero-actions {
  display: flex;
  gap: 16px;
  margin-top: 32px;
}
.hero .button {
  background: #fff;
  color: #243846;
}
.hero .secondary {
  background: transparent;
  color: white;
  border-color: #ffffff77;
}
.hero-dots {
  position: absolute;
  z-index: 5;
  bottom: 30px;
  left: max(24px, calc((100% - 1180px) / 2));
  display: flex;
  gap: 8px;
}
.hero-dots button {
  width: 38px;
  height: 24px;
  border: 0;
  background: none;
  padding: 10px 0;
}
.hero-dots button::after {
  content: "";
  display: block;
  height: 3px;
  background: #ffffff55;
}
.hero-dots button.active::after {
  background: white;
}
.product-scope {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  max-width: 1180px;
  margin: 0 auto;
  border-bottom: 1px solid var(--line);
}
.product-scope p {
  margin: 0;
  padding: 28px 28px 30px;
  border-left: 1px solid var(--line);
}
.product-scope p:last-child {
  border-right: 1px solid var(--line);
}
.product-scope span,
.product-scope b {
  display: block;
}
.product-scope span {
  margin-bottom: 9px;
  color: var(--accent);
  font-size: 13px;
  font-weight: 650;
}
.product-scope b {
  font-size: 14px;
  line-height: 1.65;
  font-weight: 500;
  color: #4f5c68;
}
.section {
  padding: 104px max(24px, calc((100% - 1180px) / 2));
}
.heading {
  max-width: 860px;
  margin-bottom: 52px;
}
.heading h2,
.service h2,
.demo h2 {
  font-size: 42px;
  line-height: 1.45;
  margin-bottom: 20px;
}
.heading > p:last-child,
.demo-copy {
  font-size: 16px;
  line-height: 1.9;
  color: var(--muted);
  max-width: 740px;
}
.capabilities {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
}
.capabilities article {
  position: relative;
  min-height: 220px;
  padding: 32px 30px;
  border-radius: 6px;
  background: #f7f9fb;
  transition:
    transform 0.2s ease,
    box-shadow 0.2s ease;
}
.capabilities article:nth-child(2),
.capabilities article:nth-child(5) {
  background: #f3f7f8;
}
.capabilities article:nth-child(3),
.capabilities article:nth-child(6) {
  background: #f5f7fa;
}
.capabilities article:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 34px #24384612;
}
.capabilities article > span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  margin-bottom: 28px;
  border-radius: 4px;
  background: #245e85;
  color: #fff;
  font-size: 13px;
  font-weight: 600;
}
.solution-index {
  display: none;
}
.capabilities h3 {
  font-size: 27px;
  margin-bottom: 14px;
}
.capabilities p,
.solution-copy > p:not(.label),
.architecture-grid p,
.service li p {
  font-size: 15px;
  line-height: 1.9;
  color: var(--muted);
  margin-bottom: 0;
}
.solution-copy li {
  position: relative;
  padding: 0 0 10px 18px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.7;
}
.solution-copy li:not(:last-child) {
  margin-bottom: 2px;
}
.solution-copy li:not(:last-child)::after {
  content: "";
  position: absolute;
  right: 4%;
  bottom: -1px;
  left: 4%;
  height: 3px;
  background: radial-gradient(
    ellipse at center,
    rgba(95, 125, 143, 0.12) 0%,
    rgba(95, 125, 143, 0.04) 48%,
    rgba(95, 125, 143, 0) 78%
  );
}
.solution-copy li:last-child {
  padding-bottom: 0;
}
.solution-copy li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 9px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
}
.solutions {
  background: #f1f5f7;
}
.solution-row {
  display: grid;
  grid-template-columns: minmax(0, 0.85fr) minmax(0, 1.15fr);
  gap: 72px;
  align-items: center;
  margin-top: 72px;
}
.solution-row + .solution-row {
  margin-top: 88px;
}
.solution-row.reverse {
  grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr);
}
.reverse .solution-copy {
  grid-column: 2;
  grid-row: 1;
}
.reverse .solution-visual {
  grid-column: 1;
  grid-row: 1;
}
.solution-copy .label {
  color: var(--accent);
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 14px;
}
.solution-copy h3 {
  font-size: 30px;
  line-height: 1.5;
  margin-bottom: 18px;
}
.solution-copy ul {
  display: grid;
  gap: 10px;
  list-style: none;
  margin: 24px 0 0 10px;
  padding: 18px 22px 18px 24px;
  border-left: 2px solid #83a9bf;
  background: #e9f0f3;
}
.solution-visual {
  min-width: 0;
}
.solution-visual > img {
  display: block;
  width: 100%;
  height: 330px;
  object-fit: cover;
  border-radius: 6px;
  box-shadow: 0 18px 50px #2337431a;
}
.process {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
  list-style: none;
  padding: 24px 0 0;
  margin: 0;
}
.process li {
  min-width: 0;
}
.process span {
  display: block;
  font-size: 13px;
  margin-bottom: 12px;
  color: var(--accent);
  font-weight: 600;
}
.process b {
  display: block;
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 8px;
}
.process small {
  display: block;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.8;
}
.manufacturing-depth {
  margin-top: 96px;
  padding: 56px 0 0;
  border-top: 1px solid #dce5ea;
}
.depth-intro {
  display: grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  align-items: end;
  gap: 80px;
  margin-bottom: 48px;
}
.depth-intro h3 {
  margin: 0;
  font-size: 34px;
  line-height: 1.35;
}
.depth-intro > p:last-child {
  max-width: 570px;
  margin: 0;
  color: var(--muted);
  font-size: 15px;
  line-height: 1.9;
}
.depth-flow {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  list-style: none;
  margin: 0;
  padding: 0;
  border-top: 1px solid #cfdce3;
  border-bottom: 1px solid #cfdce3;
}
.depth-flow li {
  position: relative;
  min-width: 0;
  min-height: 292px;
  padding: 68px 22px 24px;
  border-left: 1px solid #d9e3e8;
}
.depth-flow li:last-child {
  border-right: 1px solid #d9e3e8;
}
.depth-flow li::after {
  content: "";
  position: absolute;
  z-index: 2;
  top: -5px;
  right: -5px;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--accent);
}
.depth-flow li:last-child::after {
  display: none;
}
.depth-number {
  position: absolute;
  left: 22px;
  top: 22px;
  color: #7da0b7;
  font-size: 13px;
  font-weight: 650;
}
.depth-stage {
  margin: 0 0 10px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 650;
}
.depth-flow h4 {
  margin: 0 0 14px;
  font-size: 21px;
  line-height: 1.4;
  font-weight: 650;
}
.depth-flow li > p:not(.depth-stage) {
  min-height: 88px;
  margin: 0 0 18px;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.75;
}
.depth-flow small {
  display: block;
  padding-top: 14px;
  border-top: 1px solid #dce5ea;
  color: #536775;
  font-size: 12px;
  line-height: 1.6;
}
.depth-result {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  background: #203e53;
  color: #fff;
}
.depth-result p {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 0;
  padding: 24px 26px;
  border-right: 1px solid #ffffff24;
}
.depth-result p:last-child {
  border-right: 0;
}
.depth-result span {
  color: #a9c5d6;
  font-size: 12px;
}
.depth-result b {
  font-size: 16px;
  font-weight: 600;
}
.architecture-grid {
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 20px;
}
.architecture-grid article {
  position: relative;
  padding: 74px 24px 30px;
  background: #f7f9fb;
  border-radius: 6px;
}
.architecture-grid article:first-child {
  grid-column: 1 / -1;
  grid-row: 2;
  padding: 28px 32px;
  background: #203e53;
  color: #fff;
}
.architecture-grid article:first-child::before {
  display: none;
}
.architecture-grid article:first-child span,
.architecture-grid article:first-child p {
  color: #c9dce8;
}
.architecture-grid article:first-child h3 {
  margin-top: 12px;
}
.architecture-grid article::before {
  content: "";
  position: absolute;
  z-index: 1;
  top: 23px;
  left: 24px;
  width: 18px;
  height: 18px;
  border: 6px solid #fff;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 1px #dbe4e9;
}
.architecture-grid span {
  font-size: 14px;
  color: #7c8792;
  font-weight: 600;
}
.architecture-grid h3 {
  font-size: 23px;
  margin: 20px 0 14px;
}
.service {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: 80px;
  background: #f5f8fa;
}
.service ol {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  list-style: none;
  margin: 0;
  padding: 0;
  gap: 36px 48px;
}
.service li span {
  color: #7094ac;
  font-size: 32px;
  font-weight: 500;
  letter-spacing: -1px;
}
.service li b {
  display: block;
  font-size: 23px;
  font-weight: 600;
  margin: 14px 0 10px;
}
.demo {
  background: #f3f6f8;
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.2fr);
  gap: 88px;
  align-items: start;
}
.demo-intro {
  padding-top: 20px;
}
.demo h2 {
  max-width: 400px;
}
.wechat-contact {
  display: grid;
  grid-template-columns: 140px minmax(0, 1fr);
  align-items: center;
  gap: 20px;
  margin-top: 34px;
  padding-top: 28px;
  border-top: 1px solid #d8e2e7;
}
.wechat-contact img {
  display: block;
  width: 140px;
  aspect-ratio: 1;
  object-fit: contain;
  padding: 6px;
  border: 1px solid #d8e2e7;
  border-radius: 6px;
  background: #fff;
}
.wechat-contact .contact-label {
  margin-bottom: 8px;
  color: #168357;
  font-size: 13px;
  font-weight: 650;
}
.wechat-contact h3 {
  margin: 0 0 8px;
  font-size: 20px;
  line-height: 1.45;
}
.wechat-contact div > p:last-child {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.8;
}
.demo form {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
  padding: 32px;
  background: #fff;
  border-radius: 8px;
}
.demo label {
  font-size: 14px;
  font-weight: 500;
  color: #495663;
  min-width: 0;
}
.demo input,
.demo select,
.demo textarea {
  display: block;
  width: 100%;
  margin-top: 10px;
  padding: 12px 14px;
  background: #fff;
  color: var(--ink);
  border: 1px solid #dce2e7;
  border-radius: 4px;
  font-size: 15px;
  font-weight: 400;
  line-height: 1.5;
  box-shadow: none;
  transition: border-color 0.2s;
}
.demo .phone-field {
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  margin-top: 10px;
}
.demo .phone-field input {
  margin-top: 0;
}
.demo .phone-prefix {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 46px;
  border: 1px solid #dce2e7;
  border-radius: 4px 0 0 4px;
  background-color: #f7f9fb;
  color: var(--ink);
  font-size: 15px;
  font-weight: 600;
}
.demo .phone-field input {
  margin-left: -1px;
  border-radius: 0 4px 4px 0;
}
.demo .phone-field:focus-within .phone-prefix,
.demo .phone-field:focus-within input {
  border-color: #7e8c97;
}
.field-hint,
.field-error {
  display: block;
  min-height: 18px;
  margin-top: 6px;
  font-size: 12px;
  line-height: 1.5;
  font-weight: 400;
}
.field-hint {
  color: #87939e;
}
.field-error {
  min-height: 0;
  color: #b42318;
}
.demo input[aria-invalid="true"] {
  border-color: #d92d20;
}
.demo input,
.demo select {
  height: 46px;
}
.demo textarea {
  min-height: 114px;
  resize: vertical;
}
.demo input::placeholder,
.demo textarea::placeholder {
  color: #9aa3ac;
  font-weight: 400;
}
.demo input:hover,
.demo select:hover,
.demo textarea:hover {
  border-color: #adb9c3;
}
.demo input:focus,
.demo select:focus,
.demo textarea:focus {
  outline: none;
  border-color: #7e8c97;
  box-shadow: 0 0 0 2px #7e8c970c;
}
.full {
  grid-column: 1/-1;
}
.demo .button {
  justify-self: end;
  min-width: 164px;
}
.status {
  color: var(--muted);
  font-size: 13px;
  line-height: 1.7;
  margin: 0;
}
footer {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 30px max(24px, calc((100% - 1180px) / 2));
  font-size: 14px;
  text-align: center;
  color: #74808c;
}
footer p {
  margin: 0;
}
footer a {
  font-weight: 500;
}
@media (max-width: 900px) {
  .site-header {
    gap: 24px;
  }
  .site-header nav {
    gap: 20px;
  }
  .hero-content {
    padding: 100px 24px 0;
  }
  .hero h1,
  .hero h2 {
    font-size: 44px;
    max-width: 600px;
  }
  .solution-row,
  .solution-row.reverse,
  .service,
  .demo {
    grid-template-columns: minmax(0, 1fr);
    gap: 36px;
  }
  .reverse .solution-copy,
  .reverse .solution-visual {
    grid-column: auto;
    grid-row: auto;
  }
  .architecture-grid {
    grid-template-columns: minmax(0, 1fr);
  }
  .depth-intro {
    gap: 40px;
  }
  .depth-flow {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    border-bottom: 0;
  }
  .depth-flow li {
    border-bottom: 1px solid #d9e3e8;
  }
  .depth-flow li::after {
    display: none;
  }
  .architecture-grid article:first-child {
    grid-row: 4;
  }
  .capabilities {
    gap: 32px;
  }
  .demo-intro {
    padding-top: 0;
  }
  .demo h2 {
    max-width: 600px;
  }
}
@media (max-width: 600px) {
  .site-header {
    height: 64px;
    padding: 0 20px;
    justify-content: space-between;
  }
  .site-header nav {
    display: none;
  }
  .login {
    display: none;
  }
  .header-actions {
    gap: 18px;
  }
  .menu-button {
    display: block;
  }
  .site-header.open nav {
    display: flex;
    flex-direction: column;
    position: absolute;
    top: 64px;
    left: 0;
    right: 0;
    z-index: 20;
    padding: 24px;
    background: #fff;
  }
  .hero {
    height: 580px;
  }
  .hero-content {
    padding: 90px 24px 0;
  }
  .hero h1,
  .hero h2 {
    font-size: 36px;
  }
  .hero-copy {
    font-size: 16px;
  }
  .hero-actions {
    gap: 10px;
  }
  .hero-actions .button {
    padding: 11px 15px;
    font-size: 14px;
  }
  .shade {
    background: #142735b8;
  }
  .section {
    padding: 60px 24px;
  }
  .product-scope {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    margin: 0 20px;
  }
  .product-scope p {
    padding: 20px 14px;
    border-bottom: 1px solid var(--line);
  }
  .product-scope p:nth-child(2) {
    border-right: 1px solid var(--line);
  }
  .product-scope p:nth-last-child(-n + 2) {
    border-bottom: 0;
  }
  .heading {
    margin-bottom: 36px;
  }
  .heading h2,
  .service h2,
  .demo h2 {
    font-size: 29px;
  }
  .capabilities,
  .architecture-grid,
  .service ol {
    grid-template-columns: minmax(0, 1fr);
    gap: 30px;
  }
  .manufacturing-depth {
    margin-top: 60px;
    padding-top: 40px;
  }
  .depth-intro {
    grid-template-columns: minmax(0, 1fr);
    align-items: start;
    gap: 18px;
    margin-bottom: 32px;
  }
  .depth-intro h3 {
    font-size: 28px;
  }
  .depth-intro > p:last-child {
    font-size: 15px;
  }
  .depth-flow {
    grid-template-columns: minmax(0, 1fr);
    border-bottom: 1px solid #cfdce3;
  }
  .depth-flow li {
    min-height: 0;
    padding: 28px 20px 26px 70px;
    border-right: 1px solid #d9e3e8;
  }
  .depth-number {
    left: 20px;
    top: 31px;
  }
  .depth-flow li > p:not(.depth-stage) {
    min-height: 0;
  }
  .depth-result {
    grid-template-columns: minmax(0, 1fr);
  }
  .depth-result p {
    border-right: 0;
    border-bottom: 1px solid #ffffff24;
  }
  .depth-result p:last-child {
    border-bottom: 0;
  }
  .solution-row {
    margin-top: 36px;
  }
  .solution-row + .solution-row {
    margin-top: 60px;
  }
  .solution-copy h3 {
    font-size: 26px;
  }
  .solution-copy ul {
    margin-left: 0;
    padding: 16px 18px 16px 20px;
  }
  .solution-visual > img {
    height: 210px;
  }
  .process {
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 24px;
  }
  .demo form {
    grid-template-columns: minmax(0, 1fr);
    padding: 24px 20px;
    gap: 20px;
  }
  .demo .button {
    width: 100%;
  }
  .wechat-contact {
    grid-template-columns: 116px minmax(0, 1fr);
    gap: 16px;
    margin-top: 28px;
    padding-top: 24px;
  }
  .wechat-contact img {
    width: 116px;
  }
  .wechat-contact h3 {
    font-size: 18px;
  }
  footer {
    justify-content: center;
    padding: 28px 24px;
  }
}
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  .hero-slide {
    transition: none;
  }
}