@font-face {
  font-family: "AlibabaPuHuiTi";
  src: url("../font/AlibabaPuHuiTi-3-55-Regular.woff2") format("woff2"),
       url("../font/AlibabaPuHuiTi-3-55-Regular.woff") format("woff");
}

:root {
  --ink: #18202b;
  --ink-strong: #09131f;
  --muted: #647082;
  --soft: #f4f7f9;
  --mist: #eef6f3;
  --line: #dfe7ec;
  --white: #ffffff;
  --jade: #0b8a75;
  --jade-deep: #063f37;
  --violet: #6542c6;
  --indigo: #1e56c5;
  --gold: #bd8b2d;
  --coral: #d8664b;
  --shadow-sm: 0 10px 28px rgba(16, 31, 43, .07);
  --shadow-lg: 0 26px 70px rgba(16, 31, 43, .16);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  color: var(--ink);
  font-family: AlibabaPuHuiTi, "Microsoft YaHei", Arial, sans-serif;
  background:
    linear-gradient(180deg, rgba(244, 247, 249, .85) 0, rgba(255, 255, 255, 0) 360px),
    #fff;
}

a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
p, h1, h2, h3, h4 { margin: 0; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255, 255, 255, .92);
  border-bottom: 1px solid rgba(209, 220, 229, .9);
  box-shadow: 0 10px 32px rgba(16, 31, 43, .08);
  backdrop-filter: blur(20px);
}

.nav-wrap {
  width: min(1260px, 100%);
  min-height: 82px;
  margin: 0 auto;
  padding: 0 34px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
}

.brand {
  display: inline-flex;
  align-items: center;
  flex: 0 0 auto;
  min-width: 230px;
  padding: 8px 0;
}

.brand img {
  display: block;
  width: 230px;
  height: 74px;
  object-fit: contain;
}

.site-header nav {
  display: flex;
  justify-content: center;
  flex: 1 1 auto;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 14px;
  list-style: none;
  padding: 0;
  margin: 0;
}

.nav-link,
.dropdown-toggle {
  position: relative;
  display: inline-flex;
  align-items: center;
  min-height: 46px;
  padding: 0 14px;
  border-radius: 7px;
  border: 0;
  background: transparent;
  color: rgba(0, 0, 0, .55);
  font-family: AlibabaPuHuiTi, "Microsoft YaHei", Arial, sans-serif;
  font-size: 17px;
  font-weight: 400;
  line-height: 46px;
  cursor: pointer;
  white-space: nowrap;
  transition: color .18s ease, background .18s ease;
}

.nav-link:after,
.dropdown-toggle:after {
  content: "";
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: 3px;
  height: 2px;
  transform: scaleX(0);
  transform-origin: left;
  background: linear-gradient(90deg, var(--jade), var(--violet));
  transition: transform .2s ease;
}

.nav-link.is-hover,
.dropdown.is-hover .dropdown-toggle {
  color: var(--jade-deep);
  background: linear-gradient(135deg, rgba(11, 138, 117, .1), rgba(101, 66, 198, .08));
}

.nav-link.is-hover:after,
.dropdown.is-hover .dropdown-toggle:after { transform: scaleX(1); }

.dropdown { position: relative; }

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 230px;
  display: none;
  padding: 12px;
  background: rgba(255, 255, 255, .96);
  border: 1px solid rgba(223, 231, 236, .95);
  border-radius: 8px;
  box-shadow: var(--shadow-lg);
  backdrop-filter: blur(16px);
}

.dropdown.is-hover .dropdown-menu { display: grid; gap: 4px; }

.dropdown-menu a {
  padding: 12px 14px;
  border-radius: 6px;
  color: #212529;
  font-size: 17px;
  font-weight: 400;
  line-height: 30px;
}

.dropdown-menu a:hover {
  color: var(--jade-deep);
  background: #edf8f5;
}

.nav-cta,
.btn {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  border-radius: 7px;
  border: 1px solid transparent;
  font-weight: 400;
  white-space: nowrap;
  overflow: hidden;
}

.nav-cta,
.btn-primary {
  color: #fff;
  background: linear-gradient(135deg, var(--jade) 0%, var(--indigo) 52%, var(--violet) 100%);
  box-shadow: 0 12px 30px rgba(11, 138, 117, .22);
}

.btn-secondary {
  color: var(--jade-deep);
  border-color: rgba(11, 138, 117, .26);
  background: rgba(255, 255, 255, .88);
}

.btn:hover,
.nav-cta:hover {
  transform: translateY(-1px);
  transition: transform .18s ease, box-shadow .18s ease;
}

.menu-button {
  display: none;
  width: 46px;
  height: 46px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: #fff;
  box-shadow: var(--shadow-sm);
}

.menu-button span {
  display: block;
  width: 18px;
  height: 2px;
  margin: 5px auto;
  background: var(--ink);
}

.mobile-panel { display: none; }

.hero {
  position: relative;
  overflow: hidden;
  min-height: 650px;
  display: grid;
  align-items: center;
  isolation: isolate;
  background:
    linear-gradient(90deg, rgba(246, 250, 248, .99) 0%, rgba(246, 250, 248, .92) 38%, rgba(246, 250, 248, .54) 66%, rgba(246, 250, 248, .18) 100%),
    var(--hero-image, url("../img/generated/hero-industrial-ai.png")) center/cover no-repeat;
}

.hero:before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background: linear-gradient(180deg, rgba(255,255,255,0) 70%, rgba(255,255,255,.95) 100%);
  pointer-events: none;
}

.hero:after {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 1px;
  background: var(--line);
}

.hero-inner,
.section-inner {
  width: min(1200px, calc(100% - 48px));
  margin: 0 auto;
}

.hero-content {
  position: relative;
  max-width: 770px;
  padding: 106px 0 82px;
}

.hero-content:after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 24px;
  width: min(560px, 78vw);
  height: 1px;
  background: linear-gradient(90deg, rgba(11, 138, 117, .48), rgba(101, 66, 198, .22), transparent);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  min-height: 32px;
  color: var(--jade-deep);
  font-size: 14px;
  font-weight: 900;
  letter-spacing: 0;
  margin-bottom: 18px;
  text-transform: none;
}

.eyebrow:before {
  content: "";
  width: 34px;
  height: 3px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--gold), var(--coral));
}

.hero h1 {
  max-width: 860px;
  color: var(--ink-strong);
  font-size: clamp(44px, 7vw, 82px);
  line-height: .98;
  font-weight: 900;
  letter-spacing: 0;
}

.hero-text {
  margin-top: 24px;
  max-width: 690px;
  color: #3d4857;
  font-size: 20px;
  line-height: 1.82;
}

.hero-actions {
  display: flex;
  gap: 14px;
  margin-top: 34px;
  flex-wrap: wrap;
}

.hero-tags {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 36px;
}

.hero-tags span,
.pill {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 0 13px;
  border: 1px solid rgba(11, 138, 117, .2);
  border-radius: 999px;
  color: var(--jade-deep);
  background: rgba(255, 255, 255, .72);
  box-shadow: 0 8px 24px rgba(9, 19, 31, .05);
  font-size: 14px;
  backdrop-filter: blur(12px);
}

.hero-tags span:nth-child(2n) {
  border-color: rgba(101, 66, 198, .2);
  color: #382872;
}

.section {
  position: relative;
  padding: 92px 0;
}

.section.alt {
  background:
    linear-gradient(180deg, rgba(244, 247, 249, .95), rgba(239, 246, 243, .7)),
    var(--soft);
}

.section.compact { padding: 68px 0; }

.section-head {
  display: grid;
  grid-template-columns: minmax(0, .9fr) minmax(280px, .42fr);
  gap: 48px;
  align-items: end;
  margin-bottom: 42px;
}

.section-head h2,
.split h2 {
  color: var(--ink-strong);
  font-size: clamp(30px, 4vw, 48px);
  line-height: 1.16;
  letter-spacing: 0;
  font-weight: 900;
}

.section-head h2:after,
.split h2:after {
  content: "";
  display: block;
  width: 58px;
  height: 4px;
  margin-top: 18px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--jade), var(--gold));
}

.section-head p {
  color: var(--muted);
  font-size: 17px;
  line-height: 1.82;
}

.grid { display: grid; gap: 20px; }
.grid.two { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.grid.three { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid.four { grid-template-columns: repeat(4, minmax(0, 1fr)); }

.card {
  position: relative;
  min-height: 100%;
  padding: 28px;
  border: 1px solid rgba(223, 231, 236, .9);
  border-radius: 8px;
  background: rgba(255, 255, 255, .94);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.card:before {
  content: "";
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 4px;
  background: linear-gradient(90deg, rgba(11, 138, 117, .85), rgba(101, 66, 198, .35));
}

.card.accent:before { background: linear-gradient(90deg, var(--jade), #8bc6a5); }
.card.purple:before { background: linear-gradient(90deg, var(--violet), #b7a2ff); }
.card.gold:before { background: linear-gradient(90deg, var(--gold), #edc46d); }
.card.blue:before { background: linear-gradient(90deg, var(--indigo), #78b7ff); }

.card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-lg);
  transition: transform .2s ease, box-shadow .2s ease;
}

.card h3 {
  color: var(--ink-strong);
  font-size: 22px;
  line-height: 1.34;
  margin-bottom: 12px;
  font-weight: 900;
}

.card p,
.card li {
  color: var(--muted);
  font-size: 16px;
  line-height: 1.75;
}

.card ul {
  margin: 14px 0 0;
  padding-left: 18px;
}

.card-kicker {
  display: inline-flex;
  margin-bottom: 12px;
  color: var(--gold);
  font-size: 13px;
  font-weight: 900;
}

.visual-card {
  padding: 0;
  background: #fff;
}

.visual-card:before { display: none; }

.visual-card img {
  width: 100%;
  height: 238px;
  object-fit: cover;
  filter: saturate(1.06) contrast(1.02);
}

.visual-card .card-body {
  position: relative;
  padding: 25px 24px 28px;
}

.visual-card .card-body:before {
  content: "";
  position: absolute;
  left: 24px;
  top: 0;
  width: 54px;
  height: 4px;
  transform: translateY(-50%);
  border-radius: 999px;
  background: linear-gradient(90deg, var(--jade), var(--gold));
}

.metric-row {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 1px;
  overflow: hidden;
  border: 1px solid rgba(223, 231, 236, .95);
  border-radius: 8px;
  background: var(--line);
  box-shadow: var(--shadow-sm);
}

.metric {
  position: relative;
  padding: 30px 26px;
  background:
    linear-gradient(145deg, rgba(255, 255, 255, .98), rgba(245, 250, 248, .96));
}

.metric:after {
  content: "";
  position: absolute;
  right: 18px;
  top: 18px;
  width: 9px;
  height: 9px;
  border-radius: 999px;
  background: var(--gold);
  opacity: .58;
}

.metric strong {
  display: block;
  color: var(--jade-deep);
  font-size: 30px;
  line-height: 1;
  margin-bottom: 12px;
  font-weight: 900;
}

.metric span {
  color: var(--muted);
  line-height: 1.68;
}

.split {
  display: grid;
  grid-template-columns: minmax(0, .92fr) minmax(0, 1.08fr);
  gap: 52px;
  align-items: center;
}

.split-image {
  position: relative;
  min-height: 440px;
  border-radius: 8px;
  background: var(--split-image, url("../img/generated/hero-industrial-ai.png")) center/cover no-repeat;
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.split-image:after {
  content: "";
  position: absolute;
  inset: 0;
  border: 1px solid rgba(255, 255, 255, .52);
  border-radius: 8px;
  background: linear-gradient(180deg, rgba(255,255,255,0), rgba(6,63,55,.18));
  pointer-events: none;
}

.feature-list {
  display: grid;
  gap: 14px;
  margin-top: 26px;
}

.feature-item {
  display: grid;
  grid-template-columns: 44px 1fr;
  gap: 15px;
  align-items: start;
  padding: 15px;
  border: 1px solid rgba(223, 231, 236, .78);
  border-radius: 8px;
  background: rgba(255, 255, 255, .76);
}

.feature-no {
  width: 44px;
  height: 44px;
  border-radius: 8px;
  display: grid;
  place-items: center;
  color: #fff;
  font-weight: 900;
  background: linear-gradient(135deg, var(--jade), var(--indigo));
}

.feature-item h3 {
  color: var(--ink-strong);
  font-size: 19px;
  margin-bottom: 6px;
  font-weight: 900;
}

.feature-item p {
  color: var(--muted);
  line-height: 1.7;
}

.process {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 16px;
  counter-reset: step;
}

.process .card {
  padding-top: 62px;
  background:
    linear-gradient(145deg, rgba(255,255,255,.96), rgba(241,247,244,.95));
}

.process .card:after {
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
  position: absolute;
  top: 18px;
  left: 24px;
  color: rgba(101, 66, 198, .22);
  font-size: 28px;
  font-weight: 900;
}

.timeline {
  display: grid;
  gap: 16px;
  border-left: 3px solid rgba(11, 138, 117, .22);
  padding-left: 26px;
}

.timeline-item {
  position: relative;
  padding: 22px 24px;
  border: 1px solid rgba(223, 231, 236, .92);
  border-radius: 8px;
  background: #fff;
  box-shadow: var(--shadow-sm);
}

.timeline-item:before {
  content: "";
  position: absolute;
  left: -35px;
  top: 29px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--jade);
  box-shadow: 0 0 0 6px #dff2ee;
}

.timeline-item strong {
  color: var(--jade-deep);
  display: block;
  margin-bottom: 8px;
  font-weight: 900;
}

.timeline-item p {
  color: var(--muted);
  line-height: 1.65;
}

.compare {
  width: 100%;
  border-collapse: collapse;
  overflow: hidden;
  border-radius: 8px;
  box-shadow: 0 0 0 1px var(--line), var(--shadow-sm);
  background: #fff;
}

.compare th,
.compare td {
  padding: 18px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  vertical-align: top;
  line-height: 1.66;
}

.compare th {
  background: linear-gradient(135deg, #e8f5f1, #eef1ff);
  color: var(--jade-deep);
  font-weight: 900;
}

.compare tr:last-child td { border-bottom: 0; }

.cta-band {
  position: relative;
  overflow: hidden;
  padding: 58px;
  border-radius: 8px;
  background:
    linear-gradient(105deg, rgba(6, 63, 55, .94) 0%, rgba(24, 32, 43, .9) 50%, rgba(101, 66, 198, .78) 100%),
    url("../img/generated/hero-industrial-ai.png") center/cover no-repeat;
  color: #fff;
  box-shadow: var(--shadow-lg);
}

.cta-band:after {
  content: "";
  position: absolute;
  inset: 0;
  background: repeating-linear-gradient(90deg, rgba(255,255,255,.08) 0 1px, transparent 1px 96px);
  opacity: .35;
  pointer-events: none;
}

.cta-band h2,
.cta-band p,
.cta-band .hero-actions {
  position: relative;
  z-index: 1;
}

.cta-band h2 {
  max-width: 880px;
  font-size: clamp(30px, 4vw, 46px);
  line-height: 1.2;
  font-weight: 900;
}

.cta-band p {
  max-width: 740px;
  margin-top: 16px;
  color: rgba(255, 255, 255, .82);
  line-height: 1.8;
}

.cta-band .hero-actions { margin-top: 28px; }
.cta-band .btn-secondary {
  color: #fff;
  background: rgba(255,255,255,.08);
  border-color: rgba(255,255,255,.38);
}

.site-footer {
  background: #101820;
  color: #d8dee8;
}

.footer-inner {
  width: min(1200px, calc(100% - 48px));
  margin: 0 auto;
  padding: 56px 0 30px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr repeat(4, 1fr);
  gap: 34px;
}

.footer-grid h3,
.footer-grid h4 {
  color: #fff;
  margin-bottom: 14px;
}

.footer-grid p,
.footer-grid a {
  color: #b7c1d1;
  line-height: 1.9;
  font-size: 14px;
}

.footer-grid a { display: block; }
.footer-grid a:hover { color: #fff; }

.footer-bottom {
  margin-top: 34px;
  padding: 22px 0 0;
  border-top: 1px solid rgba(255,255,255,.16);
  color: rgba(255,255,255,.88);
  font-size: 15px;
  line-height: 1.7;
  text-align: center;
  letter-spacing: 0;
}

.footer-bottom a {
  display: inline-flex;
  align-items: center;
  margin-left: 18px;
  color: rgba(255,255,255,.9);
  font-weight: 700;
}

.footer-bottom a:hover {
  color: #fff;
}

@media (max-width: 980px) {
  .nav-links,
  .nav-cta { display: none; }

  .menu-button { display: block; }

  .mobile-panel {
    display: none;
    border-top: 1px solid var(--line);
    background: #fff;
    padding: 12px 24px 24px;
  }

  .mobile-panel.open { display: grid; gap: 4px; }

  .mobile-panel a,
  .mobile-panel button {
    display: flex;
    width: 100%;
    min-height: 42px;
    align-items: center;
    padding: 0;
    border: 0;
    background: transparent;
    color: #333;
    font-family: AlibabaPuHuiTi, "Microsoft YaHei", Arial, sans-serif;
    font-size: 17px;
    font-weight: 700;
  }

  .mobile-sub {
    display: none;
    padding: 0 0 10px 18px;
  }

  .mobile-sub.open { display: grid; gap: 6px; }

  .mobile-sub a {
    color: #999;
    font-weight: 400;
    min-height: 30px;
  }

  .hero {
    min-height: 570px;
    background:
      linear-gradient(90deg, rgba(246, 250, 248, .98) 0%, rgba(246, 250, 248, .86) 64%, rgba(246, 250, 248, .5) 100%),
      var(--hero-image, url("../img/generated/hero-industrial-ai.png")) center/cover no-repeat;
  }

  .section-head,
  .split {
    grid-template-columns: 1fr;
    gap: 26px;
  }

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

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

@media (max-width: 640px) {
  .nav-wrap {
    padding: 0 18px;
    min-height: 68px;
  }

  .brand {
    min-width: 172px;
  }

  .brand img {
    width: 172px;
    height: 54px;
  }

  .hero-inner,
  .section-inner,
  .footer-inner { width: min(100% - 32px, 1200px); }

  .hero {
    min-height: 540px;
    background:
      linear-gradient(180deg, rgba(246, 250, 248, .98) 0%, rgba(246, 250, 248, .9) 70%, rgba(246, 250, 248, .76) 100%),
      var(--hero-image, url("../img/generated/hero-industrial-ai.png")) center/cover no-repeat;
  }

  .hero-content { padding: 76px 0 58px; }
  .hero-content:after { bottom: 18px; }
  .hero h1 { font-size: 42px; line-height: 1.06; }
  .hero-text { font-size: 17px; line-height: 1.76; }

  .section { padding: 64px 0; }
  .section-head { margin-bottom: 30px; }

  .grid.two,
  .grid.three,
  .grid.four,
  .process,
  .metric-row { grid-template-columns: 1fr; }

  .card { padding: 22px; }
  .visual-card { padding: 0; }
  .visual-card img { height: 210px; }
  .split-image { min-height: 300px; }
  .compare { display: block; overflow-x: auto; }
  .compare th,
  .compare td { min-width: 180px; }
  .cta-band { padding: 36px 24px; }
  .footer-grid { grid-template-columns: 1fr; }
}