:root {
  --red: #b5121b;
  --red-dark: #8f0f16;
  --ink: #16181d;
  --muted: #5f6673;
  --line: #e7e9ee;
  --soft: #f6f7f9;
  --white: #ffffff;
  --shadow: 0 18px 48px rgba(18, 24, 38, 0.10);
  --container: 1240px;
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: "Microsoft YaHei", "PingFang SC", "Noto Sans SC", Arial, sans-serif;
  color: var(--ink);
  background: var(--white);
  line-height: 1.7;
}

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

.topbar {
  display: flex;
  justify-content: space-between;
  gap: 24px;
  padding: 8px clamp(18px, 4vw, 64px);
  color: #fff;
  background: #2c3038;
  font-size: 13px;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 10;
  background: rgba(255, 255, 255, 0.96);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(12px);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  min-height: 74px;
  padding: 0 clamp(18px, 4vw, 64px);
}

.brand {
  display: flex;
  align-items: center;
  gap: 12px;
  min-width: 220px;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 42px;
  height: 42px;
  color: #fff;
  background: var(--red);
  border-radius: 8px;
  font-weight: 800;
  font-size: 22px;
}

.brand strong {
  display: block;
  font-size: 20px;
  line-height: 1.1;
}

.brand small {
  display: block;
  color: var(--muted);
  font-size: 12px;
}

.nav-links {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 22px;
  font-size: 15px;
}

.nav-links a {
  color: #303540;
  white-space: nowrap;
}

.nav-links a:hover {
  color: var(--red);
}

.nav-cta {
  padding: 9px 14px;
  color: #fff !important;
  background: var(--red);
  border-radius: 6px;
}

.nav-toggle {
  display: none;
  border: 0;
  background: none;
  font-size: 26px;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.16fr) minmax(380px, 0.84fr);
  align-items: center;
  gap: 56px;
  max-width: none;
  min-height: 760px;
  margin: 0 auto;
  padding: 86px max(48px, calc((100vw - var(--container)) / 2)) 68px;
  background:
    linear-gradient(90deg, rgba(255,255,255,0.98) 0%, rgba(255,255,255,0.94) 52%, rgba(246,247,249,0.96) 52%, rgba(246,247,249,0.96) 100%),
    radial-gradient(circle at 82% 20%, rgba(181, 18, 27, 0.13), transparent 26%),
    #fff;
}

.hero::before {
  content: "";
  position: absolute;
}

.eyebrow {
  margin: 0 0 12px;
  color: var(--red);
  font-weight: 700;
  letter-spacing: 0;
}

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

h1 {
  margin-bottom: 22px;
  max-width: 860px;
  font-size: clamp(46px, 5.4vw, 78px);
  line-height: 1.08;
  letter-spacing: 0;
}

h2 {
  margin-bottom: 16px;
  font-size: clamp(28px, 3.2vw, 44px);
  line-height: 1.18;
  letter-spacing: 0;
}

h3 {
  margin-bottom: 10px;
  font-size: 21px;
  line-height: 1.25;
}

.hero-lede {
  max-width: 820px;
  color: #333945;
  font-size: 20px;
  line-height: 1.8;
}

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin: 28px 0 32px;
}

.hero-tags span,
.metric-row span {
  padding: 8px 12px;
  background: #fff;
  border: 1px solid var(--line);
  border-left: 3px solid var(--red);
  border-radius: 6px;
  color: #303540;
  font-size: 14px;
  box-shadow: 0 8px 22px rgba(20, 24, 32, 0.05);
}

.hero-actions,
.quote-band {
  display: flex;
  align-items: center;
  gap: 14px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 20px;
  border-radius: 6px;
  font-weight: 700;
}

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

.btn.primary:hover,
.nav-cta:hover {
  background: var(--red-dark);
}

.btn.secondary {
  color: var(--ink);
  border: 1px solid var(--line);
  background: #fff;
}

.hero-visual {
  display: grid;
  gap: 18px;
  align-self: stretch;
  align-content: center;
}

.visual-card {
  padding: 24px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
}

.visual-card.large {
  min-height: 420px;
}

.booth-illustration {
  position: relative;
  min-height: 280px;
  margin-bottom: 18px;
  overflow: hidden;
  background:
    linear-gradient(180deg, #fdfdfd 0%, #eceff3 100%);
  border: 1px solid #d8dce3;
  border-radius: 8px;
}

.booth-illustration::before {
  content: "";
  position: absolute;
  left: 12%;
  right: 12%;
  bottom: 38px;
  height: 144px;
  background:
    linear-gradient(90deg, #c4c9d1 0 14%, transparent 14% 18%, #f7f7f6 18% 64%, transparent 64% 68%, #c4c9d1 68% 100%);
  border: 3px solid #555b66;
  box-shadow: inset 0 0 0 8px #fafafa;
}

.booth-illustration::after {
  content: "";
  position: absolute;
  left: 8%;
  right: 8%;
  bottom: 178px;
  height: 56px;
  background: #2f343d;
  clip-path: polygon(4% 0, 96% 0, 100% 100%, 0 100%);
}

.visual-card strong,
.visual-card span {
  display: block;
}

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

.visual-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.mini-visual {
  min-height: 76px;
  display: grid;
  place-items: center;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: #363b46;
  font-weight: 700;
}

.trust-strip {
  display: grid;
  grid-template-columns: repeat(5, minmax(0, 1fr));
  gap: 0;
  max-width: var(--container);
  margin: -18px auto 0;
  position: relative;
  z-index: 2;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  overflow: hidden;
}

.trust-strip div {
  min-height: 112px;
  padding: 22px 20px;
  border-right: 1px solid var(--line);
}

.trust-strip div:last-child {
  border-right: 0;
}

.trust-strip strong,
.trust-strip span {
  display: block;
}

.trust-strip strong {
  margin-bottom: 8px;
  color: var(--ink);
  font-size: 18px;
  line-height: 1.25;
}

.trust-strip span {
  color: var(--muted);
  font-size: 14px;
}

.section {
  padding: 84px clamp(18px, 5vw, 80px);
}

.section > * {
  max-width: var(--container);
  margin-left: auto;
  margin-right: auto;
}

.section-head {
  max-width: 980px;
  margin-bottom: 34px;
  margin-left: auto;
  margin-right: auto;
  text-align: center;
}

.section-head .eyebrow::after {
  content: "";
  display: block;
  width: 46px;
  height: 3px;
  margin: 10px auto 0;
  background: var(--red);
  border-radius: 999px;
}

.section-head p:not(.eyebrow),
.split p,
.quote-band p {
  color: var(--muted);
}

.product-section {
  background: linear-gradient(180deg, #fff 0%, #f7f8fa 100%);
}

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

.product-card {
  display: flex;
  flex-direction: column;
  min-height: 410px;
  padding: 16px 16px 20px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  box-shadow: 0 10px 24px rgba(18, 24, 38, 0.055);
  transition: transform 180ms ease, box-shadow 180ms ease, border-color 180ms ease;
}

.product-card:hover {
  transform: translateY(-4px);
  border-color: rgba(181, 18, 27, 0.28);
  box-shadow: 0 18px 38px rgba(18, 24, 38, 0.10);
}

.product-card h3 {
  margin: 16px 0 8px;
}

.product-card p {
  color: #414753;
  font-size: 15px;
}

.product-card small {
  display: block;
  margin-top: auto;
  color: var(--muted);
  border-top: 1px solid var(--line);
  padding-top: 12px;
}

.product-img {
  position: relative;
  min-height: 172px;
  display: flex;
  align-items: flex-end;
  justify-content: flex-start;
  padding: 14px;
  overflow: hidden;
  color: #fff;
  background: #dde2e8;
  border-radius: 6px;
}

.product-img span::before {
  content: "";
  display: inline-block;
  width: 7px;
  height: 7px;
  margin-right: 6px;
  background: var(--red);
  border-radius: 50%;
  vertical-align: middle;
}

.product-img::before {
  content: "";
  position: absolute;
  left: 13%;
  right: 13%;
  bottom: 38px;
  height: 58px;
  background: rgba(255,255,255,0.86);
  border: 2px solid rgba(35, 41, 51, 0.55);
}

.product-img::after {
  content: "";
  position: absolute;
  left: 9%;
  right: 9%;
  bottom: 95px;
  height: 26px;
  background: rgba(35, 41, 51, 0.86);
  clip-path: polygon(4% 0, 96% 0, 100% 100%, 0 100%);
}

.product-img span {
  position: relative;
  z-index: 1;
  padding: 4px 8px;
  background: rgba(0, 0, 0, 0.5);
  border-radius: 4px;
  font-weight: 700;
}

.theme-1 { background: linear-gradient(135deg, #c4c8ce, #eef0f2); }
.theme-2 { background: linear-gradient(135deg, #aeb7c4, #e7eaef); }
.theme-3 { background: linear-gradient(135deg, #b8c3cd, #f1f4f6); }
.theme-4 { background: linear-gradient(135deg, #c9b9a5, #f3eee6); }
.theme-5 { background: linear-gradient(135deg, #95a5b4, #e9eef2); }
.theme-6 { background: linear-gradient(135deg, #879789, #e6ede7); }
.theme-7 { background: linear-gradient(135deg, #a8adb7, #f3f3f5); }
.theme-8 { background: linear-gradient(135deg, #b8ada2, #f2efea); }
.theme-9 { background: linear-gradient(135deg, #aeb2ba, #eeeeef); }
.theme-10 { background: linear-gradient(135deg, #9da5ad, #ebedf0); }

.scenario-section {
  background: #fff;
}

.scenario-grid {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 18px;
}

.scenario-grid article {
  min-height: 238px;
  padding: 26px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: linear-gradient(180deg, #fff 0%, #fafafa 100%);
}

.scenario-grid span {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  margin-bottom: 20px;
  color: #fff;
  background: var(--red);
  border-radius: 8px;
  font-weight: 800;
}

.scenario-grid p {
  color: var(--muted);
}

.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(320px, 0.74fr);
  gap: 34px;
  align-items: center;
}

.feature-product,
.process-section,
.faq-preview {
  background: #f5f6f8;
}

.config-section {
  background:
    linear-gradient(90deg, rgba(181, 18, 27, 0.055), transparent 34%),
    #fff;
}

.config-section .section-head {
  text-align: left;
}

.config-section .section-head .eyebrow::after {
  margin-left: 0;
}

.check-list,
.config-grid ul {
  padding-left: 0;
  list-style: none;
}

.check-list li,
.config-grid li {
  position: relative;
  padding-left: 24px;
  margin-bottom: 10px;
}

.check-list li::before,
.config-grid li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 8px;
  height: 8px;
  background: var(--red);
  border-radius: 50%;
}

.spec-panel,
.config-grid article,
.factory-card,
.faq-grid details {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: 0 12px 34px rgba(18, 24, 38, 0.07);
}

.spec-panel {
  padding: 26px;
}

.spec-panel dl,
.spec-panel dd {
  margin: 0;
}

.spec-panel div {
  display: grid;
  gap: 4px;
  padding: 14px 0;
  border-bottom: 1px solid var(--line);
}

.spec-panel div:last-child {
  border-bottom: 0;
}

.spec-panel dt {
  font-weight: 700;
}

.spec-panel dd {
  color: var(--muted);
}

.config-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 22px;
}

.config-grid article {
  padding: 28px;
}

.config-grid .highlight {
  border-top: 4px solid var(--red);
}

.text-link {
  display: inline-flex;
  margin-top: 22px;
  color: var(--red);
  font-weight: 700;
}

.factory-section {
  background: #fff;
}

.factory-card {
  min-height: 260px;
  display: grid;
  place-items: center;
  text-align: center;
  background: #2c3038;
  color: #fff;
}

.factory-card .big-number {
  display: block;
  color: #fff;
  font-size: clamp(58px, 8vw, 104px);
  font-weight: 800;
  line-height: 0.9;
}

.metric-row {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 22px;
}

.process-grid {
  display: grid;
  grid-template-columns: repeat(6, minmax(0, 1fr));
  gap: 14px;
}

.process-grid div {
  min-height: 132px;
  padding: 18px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.process-grid b {
  display: block;
  margin-bottom: 16px;
  color: var(--red);
  font-size: 28px;
}

.process-grid span {
  font-weight: 700;
}

.quote-band {
  justify-content: space-between;
  max-width: none;
  background:
    linear-gradient(90deg, rgba(181, 18, 27, 0.92), rgba(31, 35, 42, 0.96)),
    #2c3038;
  color: #fff;
}

.quote-band div {
  max-width: 860px;
}

.quote-band p,
.quote-band .eyebrow {
  color: #fff;
}

.faq-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

.faq-grid details {
  padding: 18px 20px;
}

.faq-grid summary {
  cursor: pointer;
  font-weight: 700;
}

.faq-grid p {
  color: var(--muted);
  margin: 12px 0 0;
}

.contact-strip {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  padding: 54px clamp(18px, 5vw, 80px);
  color: #fff;
  background: var(--red);
}

.contact-strip p,
.contact-strip h2 {
  margin-bottom: 0;
}

.contact-box {
  min-width: 260px;
  padding: 22px;
  background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.32);
  border-radius: 8px;
}

.contact-box strong,
.contact-box span {
  display: block;
}

.contact-box strong {
  font-size: 28px;
}

.contact-box .btn {
  margin-top: 14px;
  background: #fff;
  color: var(--red);
}

.footer {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 30px;
  padding: 42px clamp(18px, 5vw, 80px);
  color: #d9dde5;
  background: #1f232a;
}

.footer p {
  margin: 6px 0;
  color: #b8bec8;
}

.page-hero {
  padding: 72px clamp(18px, 5vw, 80px);
  background: var(--soft);
  border-bottom: 1px solid var(--line);
}

.content-page {
  max-width: 1180px;
  margin: 0 auto;
  padding: 56px clamp(18px, 5vw, 42px);
}

.content-card {
  padding: 28px;
  margin-bottom: 18px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 8px;
}

.table-wrap {
  overflow-x: auto;
}

table {
  width: 100%;
  min-width: 760px;
  border-collapse: collapse;
  background: #fff;
}

th, td {
  padding: 14px;
  border: 1px solid var(--line);
  text-align: left;
}

th {
  background: #f3f4f6;
}

@media (max-width: 1120px) {
  .nav-links {
    gap: 14px;
    font-size: 14px;
  }

  .hero {
    grid-template-columns: 1fr;
    min-height: auto;
    padding: 64px 32px 44px;
    background: #fff;
  }

  .trust-strip {
    grid-template-columns: repeat(3, minmax(0, 1fr));
    margin: 0 18px;
  }

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

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

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

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

@media (max-width: 820px) {
  .topbar,
  .nav-links {
    display: none;
  }

  .nav-toggle {
    display: block;
  }

  .nav.open .nav-links {
    position: absolute;
    left: 0;
    right: 0;
    top: 74px;
    display: grid;
    gap: 0;
    padding: 10px 18px 18px;
    background: #fff;
    border-bottom: 1px solid var(--line);
  }

  .nav.open .nav-links a {
    padding: 12px 0;
    border-bottom: 1px solid var(--line);
  }

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

  .visual-grid,
  .trust-strip,
  .product-grid,
  .scenario-grid,
  .config-grid,
  .split,
  .faq-grid,
  .footer {
    grid-template-columns: 1fr;
  }

  .product-grid {
    gap: 14px;
  }

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

  .contact-strip {
    align-items: stretch;
    flex-direction: column;
  }
}

@media (max-width: 520px) {
  .brand small {
    display: none;
  }

  .brand {
    min-width: 0;
  }

  .section,
  .content-page {
    padding-top: 48px;
    padding-bottom: 48px;
  }

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

  .product-card {
    min-height: auto;
  }
}