/* ============================================================
   XX智能科技 · 嵌入式方案定制 官网样式
   暗色科技风 / 主色 #3DDC97
   ============================================================ */

:root {
  --bg: #0B1117;
  --bg-alt: #0E1720;
  --bg-card: #101B26;
  --line: #1D2E3C;
  --line-soft: #16232E;
  --text: #E6EDF3;
  --text-dim: #8FA3B3;
  --text-faint: #5C7285;
  --accent: #3DDC97;
  --accent-soft: rgba(61, 220, 151, .12);
  --accent-line: rgba(61, 220, 151, .35);
  --radius: 14px;
  --font: "PingFang SC", "Microsoft YaHei", "Noto Sans SC", -apple-system, "Segoe UI", sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; }

.container {
  width: min(1160px, 92%);
  margin: 0 auto;
}

::selection { background: var(--accent); color: #06130C; }

/* ============ 顶部导航 ============ */
.nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 100;
  transition: background .3s, border-color .3s, backdrop-filter .3s;
  border-bottom: 1px solid transparent;
}
.nav.scrolled {
  background: rgba(11, 17, 23, .82);
  backdrop-filter: blur(14px);
  border-bottom-color: var(--line-soft);
}
.nav-inner {
  width: min(1160px, 92%);
  margin: 0 auto;
  height: 68px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
  font-size: 18px;
  letter-spacing: .5px;
}
.logo-mark { width: 32px; height: 32px; flex: none; }
.logo-sub {
  font-weight: 400;
  color: var(--text-dim);
  margin-left: 2px;
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 14.5px;
  color: var(--text-dim);
}
.nav-links a { transition: color .2s; }
.nav-links a:hover { color: var(--text); }
.nav-cta {
  color: var(--accent) !important;
  border: 1px solid var(--accent-line);
  padding: 8px 18px;
  border-radius: 999px;
  transition: background .2s, box-shadow .2s;
}
.nav-cta:hover {
  background: var(--accent-soft);
  box-shadow: 0 0 18px rgba(61, 220, 151, .18);
}
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 0;
  padding: 8px;
}
.nav-toggle span {
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform .25s, opacity .25s;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============ HERO ============ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 130px 0 90px;
  overflow: hidden;
}
.hero-grid-bg {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--line-soft) 1px, transparent 1px),
    linear-gradient(90deg, var(--line-soft) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 90% 70% at 60% 30%, #000 30%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 60% 30%, #000 30%, transparent 75%);
  opacity: .55;
}
.hero-glow {
  position: absolute;
  width: 720px;
  height: 720px;
  right: -180px;
  top: -180px;
  background: radial-gradient(circle, rgba(61, 220, 151, .14), transparent 62%);
  pointer-events: none;
}
.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1.05fr .95fr;
  gap: 48px;
  align-items: center;
}
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  letter-spacing: 2.5px;
  color: var(--accent);
  font-weight: 600;
}
.eyebrow .dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 10px var(--accent);
  animation: blink 2.2s infinite;
}
@keyframes blink { 50% { opacity: .35; } }

.hero h1 {
  font-size: clamp(34px, 4.6vw, 56px);
  line-height: 1.22;
  font-weight: 700;
  margin: 20px 0 22px;
  letter-spacing: .5px;
}
.grad {
  background: linear-gradient(100deg, #3DDC97, #7BFFC9 55%, #3DDC97);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-desc {
  color: var(--text-dim);
  font-size: 16.5px;
  max-width: 560px;
}
.hero-actions {
  display: flex;
  gap: 14px;
  margin-top: 34px;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: transform .15s, box-shadow .2s, background .2s, border-color .2s;
}
.btn:active { transform: scale(.97); }
.btn-primary {
  background: var(--accent);
  color: #06130C;
  box-shadow: 0 6px 26px rgba(61, 220, 151, .28);
}
.btn-primary:hover {
  box-shadow: 0 8px 34px rgba(61, 220, 151, .42);
  transform: translateY(-1px);
}
.btn-ghost {
  border-color: var(--line);
  color: var(--text);
  background: rgba(255, 255, 255, .02);
}
.btn-ghost:hover { border-color: var(--accent-line); color: var(--accent); }
.btn-block { width: 100%; justify-content: center; }

.hero-meta {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-top: 42px;
  color: var(--text-faint);
  font-size: 13.5px;
  flex-wrap: wrap;
}
.hero-meta b { color: var(--text); font-weight: 700; }
.sep { width: 1px; height: 14px; background: var(--line); }

/* 电路板视觉 */
.hero-visual { position: relative; }
.board { width: 100%; height: auto; display: block; }
.chip-label {
  fill: var(--accent);
  font-size: 13px;
  font-family: var(--font);
  font-weight: 600;
  letter-spacing: 2px;
}
.mod-label {
  fill: var(--text-dim);
  font-size: 9px;
  letter-spacing: 1px;
  font-family: var(--font);
}
.pulse-ring {
  transform-origin: 216px 152px;
  animation: pulse 3.2s ease-out infinite;
}
@keyframes pulse {
  0% { transform: scale(.6); opacity: .8; }
  100% { transform: scale(1.5); opacity: 0; }
}
.float-tag {
  position: absolute;
  display: flex;
  align-items: center;
  gap: 8px;
  background: rgba(16, 27, 38, .88);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 9px 14px;
  font-size: 13px;
  color: var(--text-dim);
  backdrop-filter: blur(8px);
  box-shadow: 0 10px 30px rgba(0, 0, 0, .35);
  animation: floaty 5s ease-in-out infinite;
}
.float-tag .k {
  color: var(--accent);
  font-weight: 700;
  font-size: 11.5px;
  letter-spacing: 1px;
}
.t1 { top: 8%; left: -4%; animation-delay: 0s; }
.t2 { top: 44%; right: -6%; animation-delay: 1.2s; }
.t3 { bottom: 6%; left: 6%; animation-delay: 2.4s; }
@keyframes floaty {
  50% { transform: translateY(-9px); }
}

.hero-scroll {
  position: absolute;
  left: 50%;
  bottom: 26px;
  transform: translateX(-50%);
  width: 24px;
  height: 38px;
  border: 1.5px solid var(--line);
  border-radius: 14px;
  display: flex;
  justify-content: center;
  padding-top: 7px;
}
.hero-scroll span {
  width: 3px;
  height: 8px;
  border-radius: 3px;
  background: var(--accent);
  animation: scrollHint 1.8s infinite;
}
@keyframes scrollHint {
  0% { transform: translateY(0); opacity: 1; }
  70% { transform: translateY(12px); opacity: 0; }
  100% { opacity: 0; }
}

/* ============ 关键数字 ============ */
.stats {
  border-top: 1px solid var(--line-soft);
  border-bottom: 1px solid var(--line-soft);
  background: var(--bg-alt);
  padding: 46px 0;
}
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.stat { text-align: center; }
.stat-num {
  font-size: 38px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 1px;
}
.stat-num em {
  font-style: normal;
  font-size: 19px;
  margin-left: 2px;
  color: var(--accent);
  opacity: .85;
}
.stat-label {
  color: var(--text-dim);
  font-size: 13.5px;
  margin-top: 4px;
}

/* ============ 通用 Section ============ */
.section { padding: 104px 0; }
.section-alt { background: var(--bg-alt); border-top: 1px solid var(--line-soft); border-bottom: 1px solid var(--line-soft); }
.sec-head { max-width: 640px; margin-bottom: 56px; }
.sec-head.center { margin-left: auto; margin-right: auto; text-align: center; }
.sec-head h2 {
  font-size: clamp(26px, 3.2vw, 38px);
  line-height: 1.3;
  margin: 16px 0 14px;
  font-weight: 700;
}
.sec-desc { color: var(--text-dim); font-size: 15.5px; }
.br-desk { display: none; }
@media (min-width: 768px) { .br-desk { display: block; } }

/* ============ 核心能力 ============ */
.cap-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.cap-card {
  position: relative;
  background: var(--bg-card);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  padding: 30px 24px;
  transition: transform .25s, border-color .25s, box-shadow .25s;
  overflow: hidden;
}
.cap-card::before {
  content: "";
  position: absolute;
  inset: 0 0 auto 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), transparent);
  opacity: 0;
  transition: opacity .25s;
}
.cap-card:hover {
  transform: translateY(-5px);
  border-color: var(--accent-line);
  box-shadow: 0 18px 40px rgba(0, 0, 0, .35);
}
.cap-card:hover::before { opacity: 1; }
.cap-idx {
  position: absolute;
  top: 20px;
  right: 22px;
  font-size: 13px;
  color: var(--text-faint);
  font-weight: 600;
  letter-spacing: 1px;
}
.cap-icon {
  width: 46px;
  height: 46px;
  border-radius: 12px;
  background: var(--accent-soft);
  border: 1px solid var(--accent-line);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  margin-bottom: 20px;
}
.cap-icon svg { width: 22px; height: 22px; }
.cap-card h3 { font-size: 18px; margin-bottom: 14px; }
.cap-list li {
  color: var(--text-dim);
  font-size: 13.8px;
  padding: 6px 0 6px 18px;
  position: relative;
}
.cap-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 14px;
  width: 7px;
  height: 7px;
  border-radius: 2px;
  background: var(--accent);
  opacity: .6;
}

/* 技术栈条 */
.stack-bar {
  margin-top: 44px;
  display: flex;
  align-items: center;
  gap: 22px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: var(--bg-card);
  padding: 20px 26px;
  flex-wrap: wrap;
}
.stack-title {
  font-size: 13px;
  color: var(--accent);
  font-weight: 700;
  letter-spacing: 2px;
  flex: none;
}
.stack-items { display: flex; flex-wrap: wrap; gap: 9px; }
.stack-items span {
  font-size: 12.8px;
  color: var(--text-dim);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 5px 13px;
  transition: color .2s, border-color .2s;
}
.stack-items span:hover { color: var(--accent); border-color: var(--accent-line); }

/* ============ 解决方案 ============ */
.sol-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}
.sol-card {
  background: var(--bg-card);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  padding: 30px;
  transition: border-color .25s, transform .25s;
}
.sol-card:hover { border-color: var(--accent-line); transform: translateY(-4px); }
.sol-tag {
  display: inline-block;
  font-size: 12px;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid var(--accent-line);
  border-radius: 6px;
  padding: 3px 11px;
  margin-bottom: 16px;
  letter-spacing: 2px;
}
.sol-card h3 { font-size: 19px; margin-bottom: 18px; }
.sol-row {
  display: grid;
  grid-template-columns: 82px 1fr;
  gap: 12px;
  padding: 10px 0;
  border-top: 1px dashed var(--line-soft);
  font-size: 14px;
}
.sol-k { color: var(--text-faint); font-size: 13px; padding-top: 2px; }
.sol-row p { color: var(--text-dim); }
.sol-deliver {
  margin-top: 16px;
  font-size: 13.2px;
  color: var(--accent);
  background: var(--accent-soft);
  border-radius: 8px;
  padding: 10px 14px;
}

/* ============ 行业 ============ */
.ind-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
}
.ind {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 30px 12px;
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: var(--bg-card);
  color: var(--text-dim);
  font-size: 14.5px;
  transition: color .2s, border-color .2s, transform .2s;
}
.ind svg { width: 30px; height: 30px; color: var(--accent); opacity: .85; }
.ind:hover { color: var(--text); border-color: var(--accent-line); transform: translateY(-3px); }

/* ============ 合作流程 ============ */
.steps {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 14px;
  margin-bottom: 46px;
}
.step {
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: var(--bg-card);
  padding: 24px 18px;
  transition: border-color .2s, transform .2s;
}
.step:hover { border-color: var(--accent-line); transform: translateY(-3px); }
.step-line {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}
.step-line::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--line-soft);
}
.step-num {
  font-size: 13px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 1px;
}
.step h3 { font-size: 15.5px; margin-bottom: 4px; }
.step-dur {
  font-size: 12px;
  color: var(--accent);
  opacity: .8;
  margin-bottom: 10px;
}
.step p:last-child { font-size: 13px; color: var(--text-dim); }

.promise-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.promise {
  border-left: 2px solid var(--accent);
  background: linear-gradient(90deg, var(--accent-soft), transparent 60%);
  border-radius: 0 10px 10px 0;
  padding: 18px 22px;
}
.promise h4 { font-size: 15.5px; margin-bottom: 6px; }
.promise p { font-size: 13.5px; color: var(--text-dim); }

/* ============ 案例 ============ */
.case-list { display: flex; flex-direction: column; gap: 20px; }
.case {
  display: grid;
  grid-template-columns: 1.6fr 1fr;
  gap: 30px;
  background: var(--bg-card);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  padding: 34px;
  transition: border-color .25s;
}
.case:hover { border-color: var(--accent-line); }
.case-kicker {
  font-size: 12.5px;
  color: var(--accent);
  letter-spacing: 1.5px;
  margin-bottom: 10px;
}
.case h3 { font-size: 21px; margin-bottom: 12px; }
.case-main > p { color: var(--text-dim); font-size: 14.5px; }
.case-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 18px; }
.case-tags span {
  font-size: 12px;
  color: var(--text-dim);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px 12px;
}
.case-result {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 14px;
  border-left: 1px solid var(--line-soft);
  padding-left: 30px;
}
.case-result > div { display: flex; align-items: baseline; gap: 12px; }
.case-result b {
  color: var(--accent);
  font-size: 24px;
  font-weight: 700;
  min-width: 96px;
  letter-spacing: .5px;
}
.case-result span { color: var(--text-dim); font-size: 13.5px; }

/* ============ 关于 ============ */
.about-grid {
  display: grid;
  grid-template-columns: 1.25fr .75fr;
  gap: 56px;
  align-items: start;
}
.about-copy h2 {
  font-size: clamp(26px, 3vw, 36px);
  line-height: 1.3;
  margin: 16px 0 20px;
}
.about-lead { color: var(--text); font-size: 15.5px; margin-bottom: 14px; }
.about-copy > p:not(.about-lead) { color: var(--text-dim); font-size: 14.5px; margin-bottom: 14px; }
.about-facts {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin-top: 28px;
}
.about-facts > div {
  display: flex;
  justify-content: space-between;
  align-items: center;
  border: 1px solid var(--line-soft);
  border-radius: 10px;
  background: var(--bg-card);
  padding: 14px 18px;
  font-size: 13.5px;
}
.about-facts span { color: var(--text-faint); }
.about-facts b { color: var(--accent); font-weight: 700; }
.about-side { display: flex; flex-direction: column; gap: 16px; }
.principle {
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  background: var(--bg-card);
  padding: 22px 24px;
  transition: border-color .2s;
}
.principle:hover { border-color: var(--accent-line); }
.p-idx {
  font-size: 12px;
  color: var(--accent);
  letter-spacing: 3px;
  margin-bottom: 8px;
}
.principle h4 { font-size: 16px; margin-bottom: 6px; }
.principle p { font-size: 13.5px; color: var(--text-dim); }

/* ============ 联系 ============ */
.section-contact {
  background:
    radial-gradient(ellipse 60% 50% at 80% 20%, rgba(61, 220, 151, .07), transparent),
    var(--bg-alt);
  border-top: 1px solid var(--line-soft);
}
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: start;
}
.contact-copy h2 {
  font-size: clamp(26px, 3vw, 36px);
  margin: 16px 0 14px;
}
.contact-lead { color: var(--text-dim); font-size: 15px; margin-bottom: 30px; }
.contact-info { display: flex; flex-direction: column; gap: 6px; margin-bottom: 26px; }
.info-item {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 13px 4px;
  border-bottom: 1px solid var(--line-soft);
  transition: padding-left .2s;
}
a.info-item:hover { padding-left: 10px; }
.info-k {
  font-size: 13px;
  color: var(--text-faint);
  width: 36px;
  flex: none;
}
.info-v { color: var(--text); font-size: 15px; font-weight: 500; }
a.info-item:hover .info-v { color: var(--accent); }
.contact-note { font-size: 13px; color: var(--text-faint); }

.contact-form {
  background: var(--bg-card);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius);
  padding: 34px;
  display: flex;
  flex-direction: column;
  gap: 18px;
}
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.contact-form label { display: flex; flex-direction: column; gap: 8px; }
.contact-form label > span { font-size: 13.5px; color: var(--text-dim); }
.contact-form input,
.contact-form select,
.contact-form textarea {
  font-family: inherit;
  font-size: 14.5px;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--line);
  border-radius: 9px;
  padding: 12px 14px;
  outline: none;
  transition: border-color .2s, box-shadow .2s;
  resize: vertical;
}
.contact-form input:focus,
.contact-form select:focus,
.contact-form textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}
.contact-form ::placeholder { color: var(--text-faint); }
.form-tip {
  font-size: 13.5px;
  text-align: center;
  min-height: 20px;
  color: var(--accent);
}

/* ============ 页脚 ============ */
.footer {
  border-top: 1px solid var(--line-soft);
  background: #080D12;
  padding: 60px 0 0;
}
.footer-inner {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 48px;
  padding-bottom: 44px;
}
.footer-brand p { color: var(--text-faint); font-size: 13.5px; margin-top: 12px; }
.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.footer-cols h5 {
  font-size: 13.5px;
  color: var(--text);
  letter-spacing: 1px;
  margin-bottom: 14px;
}
.footer-cols a {
  display: block;
  color: var(--text-faint);
  font-size: 13.5px;
  padding: 4px 0;
  transition: color .2s;
}
.footer-cols a:hover { color: var(--accent); }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
  border-top: 1px solid var(--line-soft);
  padding: 20px 0;
  color: var(--text-faint);
  font-size: 12.5px;
}

/* ============ 滚动显现 ============ */
.reveal {
  opacity: 0;
  transform: translateY(26px);
  transition: opacity .7s ease, transform .7s ease;
}
.reveal.visible {
  opacity: 1;
  transform: none;
}

/* ============ 响应式 ============ */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-visual { max-width: 520px; margin: 0 auto; }
  .cap-grid { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(3, 1fr); }
  .case { grid-template-columns: 1fr; }
  .case-result {
    border-left: 0;
    border-top: 1px solid var(--line-soft);
    padding-left: 0;
    padding-top: 22px;
    flex-direction: row;
    flex-wrap: wrap;
    gap: 24px;
  }
  .about-grid, .contact-grid { grid-template-columns: 1fr; gap: 40px; }
}
@media (max-width: 720px) {
  .nav-toggle { display: flex; }
  .nav-links {
    position: fixed;
    top: 68px;
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background: rgba(11, 17, 23, .97);
    border-bottom: 1px solid var(--line-soft);
    padding: 10px 6vw 20px;
    display: none;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 13px 0; border-bottom: 1px solid var(--line-soft); }
  .nav-cta { text-align: center; margin-top: 12px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 30px 12px; }
  .cap-grid, .sol-grid, .ind-grid { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .promise-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; }
  .footer-cols { grid-template-columns: repeat(2, 1fr); }
  .float-tag { display: none; }
  .section { padding: 72px 0; }
}

/* CHANG3 preview redesign */
:root{--bg:#fff;--muted:#f6f6f8;--text:#111114;--sub:#6f7078;--line:#e5e5e9;--purple:#6d5dfc;--max:1160px}*{box-sizing:border-box}body{margin:0;color:var(--text);background:var(--bg);font-family:"PingFang SC","Microsoft YaHei",sans-serif;-webkit-font-smoothing:antialiased}a{text-decoration:none;color:inherit}.container{width:min(var(--max),calc(100% - 48px));margin:auto}.site-header{height:76px;display:flex;align-items:center;justify-content:space-between;width:min(var(--max),calc(100% - 48px));margin:auto}.brand img{width:126px;display:block}.site-header nav{display:flex;align-items:center;gap:34px;font-size:14px}.site-header nav a{color:#575860}.site-header nav a:hover{color:var(--purple)}.nav-cta{color:var(--purple)!important}.site-header button{display:none}.hero{min-height:660px;display:grid;grid-template-columns:1.05fr .95fr;align-items:center;gap:60px;padding-top:45px;padding-bottom:90px}.kicker{color:var(--sub);font-size:15px;margin:0 0 24px}.hero h1{font-size:clamp(46px,6.3vw,82px);letter-spacing:-.07em;line-height:1.08;margin:0;font-weight:600}.hero h1 span{color:var(--purple)}.lead{color:var(--sub);font-size:17px;line-height:1.9;max-width:520px;margin:28px 0 34px}.button{display:inline-flex;align-items:center;gap:18px;border:0;border-radius:999px;background:var(--purple);color:#fff;padding:14px 20px 14px 24px;font-size:14px;cursor:pointer}.button span{font-size:19px}.hero-art{height:420px;border-radius:32px;background:radial-gradient(circle at 50% 45%,#272248 0 11%,transparent 12%),linear-gradient(135deg,#181529,#080912);position:relative;overflow:hidden}.hero-art:before,.hero-art:after{content:"";position:absolute;background:linear-gradient(90deg,transparent,#776aff,transparent);height:1px;width:140%;left:-20%;opacity:.55;transform:rotate(28deg);top:34%}.hero-art:after{top:70%;transform:rotate(-24deg)}.chip{position:absolute;left:50%;top:50%;transform:translate(-50%,-50%);width:180px;height:180px;border:1px solid #8d82ff;border-radius:24px;display:grid;place-items:center;color:#a8a1ff;letter-spacing:3px;font-size:14px;box-shadow:0 0 90px #5145d855}.hero-art i{position:absolute;width:7px;height:7px;border-radius:50%;background:#a8a1ff;box-shadow:0 0 14px #a8a1ff}.hero-art i:nth-child(2){top:18%;left:19%}.hero-art i:nth-child(3){right:18%;top:25%}.hero-art i:nth-child(4){left:22%;bottom:19%}.hero-art i:nth-child(5){right:23%;bottom:28%}.section{padding:120px 0}.section-muted{background:var(--muted)}.section-head{max-width:650px;margin-bottom:50px}.section-head h2{font-size:clamp(30px,4vw,48px);line-height:1.2;letter-spacing:-.05em;font-weight:600;margin:0 0 18px}.section-head p{color:var(--sub);font-size:16px;line-height:1.8;margin:0}.grid{display:grid;gap:16px}.four{grid-template-columns:repeat(4,1fr)}.two{grid-template-columns:repeat(2,1fr)}article{border-top:1px solid var(--line);padding:26px 0}article h3{font-size:20px;font-weight:500;margin:0 0 14px}article p{font-size:15px;line-height:1.8;color:var(--sub);margin:0}article small{display:block;color:#999;font-size:13px;margin-top:24px}.solutions article{padding:30px;background:#fff;border:0;border-radius:18px}.process{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.process>div{border-top:1px solid var(--line);padding-top:22px}.process b{font-size:13px;color:var(--purple);font-weight:500}.process h3{font-size:18px;font-weight:500;margin:22px 0 10px}.process p{font-size:14px;line-height:1.7;color:var(--sub);margin:0}.case-list{display:grid;gap:0}.case-list article{display:flex;justify-content:space-between;gap:30px;align-items:center}.case-list strong{color:#999;font-size:13px;font-weight:400;white-space:nowrap}.about{display:grid;grid-template-columns:1.2fr .8fr;gap:80px;align-items:start}.about>div>p{font-size:16px;line-height:1.9;color:var(--sub);max-width:680px}.about-note{display:grid;grid-template-columns:1fr 1fr;gap:18px;border-top:1px solid var(--line);padding-top:22px;font-size:14px}.about-note span{color:#999}.about-note b{font-weight:400}.contact-section{background:#17151f;color:#fff}.contact-section .section-head p{color:#aaa}.contact{display:grid;grid-template-columns:1fr 1fr;gap:90px}.contact form{display:grid;gap:18px}.contact label{font-size:14px;color:#aaa}.contact input,.contact textarea{display:block;width:100%;border:0;border-bottom:1px solid #4a4655;background:transparent;color:#fff;padding:14px 0;outline:0;resize:vertical}.contact input:focus,.contact textarea:focus{border-color:#a8a1ff}.contact .button{justify-self:start;margin-top:10px}.form-tip{min-height:20px;color:#a8a1ff;font-size:13px;margin:0}footer{padding:36px 0;color:#999;font-size:12px}footer .container{display:flex;justify-content:space-between;align-items:center;gap:20px}footer img{width:100px;filter:brightness(.2)}@media(max-width:900px){.hero{grid-template-columns:1fr;padding-top:70px}.hero-art{height:340px}.four{grid-template-columns:repeat(2,1fr)}.about,.contact{grid-template-columns:1fr;gap:45px}}@media(max-width:640px){.container,.site-header{width:min(100% - 36px,var(--max))}.site-header{height:64px}.brand img{width:108px}.site-header button{display:grid;gap:6px;padding:8px;background:none;border:0}.site-header button span{display:block;width:22px;height:1px;background:var(--text)}.site-header nav{display:none;position:absolute;top:64px;left:0;right:0;background:#fff;padding:14px 18px 22px;flex-direction:column;align-items:flex-start;gap:18px;border-bottom:1px solid var(--line);z-index:2}.site-header nav.open{display:flex}.hero{min-height:0;padding:75px 0 80px;gap:50px}.hero h1{font-size:54px}.lead{font-size:15px;line-height:1.8}.hero-art{height:260px;border-radius:22px}.chip{width:130px;height:130px}.section{padding:80px 0}.section-head{margin-bottom:34px}.section-head h2{font-size:32px}.four,.two,.process{grid-template-columns:1fr}.solutions article{padding:24px}.case-list article{display:block}.case-list strong{display:block;margin-top:18px}.about-note{grid-template-columns:1fr 1fr}.contact{gap:35px}footer .container{align-items:flex-start;flex-direction:column}}

:root{--hero-image:url("hero-pcb-v2.png")}
.hero-art{background-image:linear-gradient(90deg,rgba(12,10,24,.55),rgba(12,10,24,.1)),url("hero-pcb-v2.png");background-size:cover;background-position:center}
.solutions article{position:relative;min-height:245px;overflow:hidden}
.solutions article:after{content:"";position:absolute;right:18px;bottom:-12px;width:170px;height:170px;background-size:contain;background-repeat:no-repeat;background-position:center;opacity:.9;pointer-events:none}
.solutions article:nth-child(1):after{background-image:url("gateway.png")}
.solutions article:nth-child(2):after{background-image:url("controller.png")}
.solutions article:nth-child(3):after{background-image:url("energy.png")}
.solutions article:nth-child(4):after{background-image:url("instrument.png")}
.solutions article h3,.solutions article p{position:relative;z-index:1;max-width:62%}
.hero h1 span{color:#2d8cff}.button{background:#1268d9}.nav-cta,.process b,.site-header nav a:hover{color:#1268d9!important}.hero-art{background-image:linear-gradient(90deg,rgba(5,18,42,.38),rgba(5,18,42,.1)),url("hero-pcb-v2.png");box-shadow:0 20px 80px rgba(18,104,217,.18)}.chip{border-color:#52b7ff;color:#8dd8ff;box-shadow:0 0 90px #1477d855}.hero-art i{background:#52b7ff;box-shadow:0 0 14px #52b7ff}.solutions article{color:#fff;background-color:#071a36;background-size:cover;background-position:center;min-height:280px;display:flex;flex-direction:column;justify-content:flex-end;padding:28px}.solutions article:before{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(4,17,39,.12),rgba(4,17,39,.92));z-index:0}.solutions article:after{display:none}.solutions article:nth-child(1){background-image:url("industrial-blue.png")}.solutions article:nth-child(2){background-image:url("smart-blue.png")}.solutions article:nth-child(3){background-image:url("energy-blue.png")}.solutions article:nth-child(4){background-image:url("hero-pcb-v2.png")}.solutions article h3,.solutions article p{position:relative;z-index:1;max-width:78%}.solutions article p{color:#d8e6f8}.solutions article h3{font-size:22px}

.stats{background:#071a36;color:#fff}.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;padding:34px 0}.stats-grid div{display:flex;flex-direction:column;gap:7px;border-left:1px solid #2d5b91;padding-left:20px}.stats-grid strong{font-size:25px;font-weight:500;color:#7bc9ff}.stats-grid span{font-size:13px;color:#aac3df}.capability-stage{display:grid;grid-template-columns:240px 1fr;align-items:center;gap:50px;margin-top:70px;padding:32px;border-radius:22px;background:linear-gradient(120deg,#061b3a,#0d315e);overflow:hidden;color:#fff}.capability-stage img{width:210px;height:150px;object-fit:contain}.capability-stage h3{font-size:24px;font-weight:500;margin:0 0 12px}.capability-stage p{color:#bad0e8;line-height:1.8;margin:0}.solution-copy{position:relative;z-index:2}.solution-copy small{color:#9fc9ed}.industry-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:0;border-top:1px solid var(--line)}.industry-grid div{padding:26px 18px;border-bottom:1px solid var(--line);border-right:1px solid var(--line);display:flex;flex-direction:column;gap:9px}.industry-grid b{font-size:18px;font-weight:500}.industry-grid span{color:var(--sub);font-size:14px}.process span{display:block;color:#6688a9;font-size:12px;margin-top:18px}.section-dark{background:#071a36;color:#fff}.section-dark .section-head p,.section-dark .about>div>p{color:#adc6e2}.section-dark .about-note{border-color:#2b5078}.section-dark .about-note span{color:#7292b3}.section-dark .about-note b{color:#fff}@media(max-width:900px){.stats-grid{grid-template-columns:repeat(2,1fr)}.capability-stage{grid-template-columns:1fr}.industry-grid{grid-template-columns:repeat(2,1fr)}}@media(max-width:640px){.stats-grid{grid-template-columns:1fr 1fr}.industry-grid{grid-template-columns:1fr}.capability-stage{padding:22px}.capability-stage img{width:170px}}

.cap-grid article{position:relative;min-height:210px;overflow:hidden}.cap-grid article:after{content:"";position:absolute;right:-16px;bottom:-18px;width:150px;height:120px;background-size:contain;background-repeat:no-repeat;background-position:center;opacity:.24;pointer-events:none}.cap-grid article:nth-child(1):after{background-image:url("pcb.png")}.cap-grid article:nth-child(2):after{background-image:url("sensor.png")}.cap-grid article:nth-child(3):after{background-image:url("wireless.png")}.cap-grid article:nth-child(4):after{background-image:url("gateway.png")}.cap-grid article h3,.cap-grid article p,.cap-grid article small{position:relative;z-index:1}.capability-stage{background-image:linear-gradient(90deg,rgba(5,24,54,.95),rgba(5,24,54,.62)),url("cloud-edge.png");background-size:cover;background-position:center}.section-dark{background-image:linear-gradient(90deg,rgba(4,18,40,.96),rgba(4,18,40,.76)),url("maintenance.png");background-size:cover;background-position:center}
.reveal-item{opacity:0;transform:translateY(24px);transition:opacity .7s ease,transform .7s ease}.reveal-item.is-visible{opacity:1;transform:none}.site-header nav a.active{color:#1268d9}.cap-grid article,.solutions article{transition:transform .3s ease,box-shadow .3s ease,border-color .3s ease}.cap-grid article:hover,.solutions article:hover{transform:translateY(-7px);box-shadow:0 18px 45px rgba(18,104,217,.18)}.cap-grid article:before,.solutions article:before{background:radial-gradient(circle at var(--mx,50%) var(--my,50%),rgba(89,183,255,.24),transparent 38%)}.solutions article .solution-copy{transition:transform .3s ease}.solutions article:hover .solution-copy{transform:translateY(-4px)}.form-tip.error{color:#ff8b8b}.form-tip.success{color:#8bd7ff}
.industry-grid{background:linear-gradient(90deg,rgba(5,20,45,.9),rgba(5,20,45,.62)),url("industry-blue.png");background-size:cover;background-position:center;border:0;border-radius:24px;padding:20px;color:#fff}.industry-grid div{border-color:#2b547d}.industry-grid span{color:#b3cce5}.section#process{background-image:linear-gradient(90deg,rgba(246,246,248,.96),rgba(246,246,248,.72)),url("process-blueprint.png");background-size:cover;background-position:center}.section#cases{background-image:linear-gradient(90deg,rgba(255,255,255,.96),rgba(255,255,255,.76)),url("case-dashboard.png");background-size:cover;background-position:center}.section-dark{background-image:linear-gradient(90deg,rgba(4,18,40,.95),rgba(4,18,40,.74)),url("about-lab.png")}
.cap-grid article{cursor:pointer}.cap-grid article.selected{border-color:#2d8cff;box-shadow:0 12px 35px rgba(18,104,217,.2)}.cap-grid article:focus-visible{outline:2px solid #52b7ff;outline-offset:4px}.capability-stage{min-height:220px}.capability-stage img{transition:opacity .25s,transform .35s}.capability-stage:hover img{transform:translateY(-8px) scale(1.04)}.stage-tags{display:inline-block;margin-top:10px;color:#82caff;font-size:13px;letter-spacing:.04em}
.solutions article{background-color:#09264a;background-blend-mode:luminosity;background-size:cover;background-position:center;box-shadow:inset 0 0 0 1000px rgba(3,20,45,.56)}.solutions article:before{display:block;background:linear-gradient(135deg,rgba(4,24,55,.72),rgba(4,24,55,.38) 55%,rgba(4,24,55,.78));mix-blend-mode:normal}.solutions article:hover{box-shadow:inset 0 0 0 1000px rgba(3,20,45,.42),0 18px 45px rgba(18,104,217,.18)}.solutions article h3{letter-spacing:-.03em}.solutions article p{color:#d5e4f5;line-height:1.9}
.solutions article{background-blend-mode:normal;box-shadow:none}.solutions article:nth-child(1){background-image:linear-gradient(rgba(4,24,55,.78),rgba(4,24,55,.78)),url("industrial-blue.png")}.solutions article:nth-child(2){background-image:linear-gradient(rgba(4,24,55,.78),rgba(4,24,55,.78)),url("smart-blue.png")}.solutions article:nth-child(3){background-image:linear-gradient(rgba(4,24,55,.78),rgba(4,24,55,.78)),url("energy-blue.png")}.solutions article:nth-child(4){background-image:linear-gradient(rgba(4,24,55,.84),rgba(4,24,55,.84)),url("hero-pcb-v2.png")}.solutions article:before{background:linear-gradient(90deg,rgba(4,24,55,.12),rgba(4,24,55,.3))}
.solutions article:nth-child(1),.solutions article:nth-child(2),.solutions article:nth-child(3),.solutions article:nth-child(4){background-image:radial-gradient(circle at 85% 20%,rgba(45,140,255,.22),transparent 34%),linear-gradient(135deg,#061a37,#0b2f59)}.solutions article:after{display:block;right:14px;bottom:8px;width:120px;height:90px;background:url("wireless.png") center/contain no-repeat;opacity:.18}
html body .solutions article:nth-child(1),html body .solutions article:nth-child(2),html body .solutions article:nth-child(3),html body .solutions article:nth-child(4){background-image:radial-gradient(circle at 85% 20%,rgba(45,140,255,.22),transparent 34%),linear-gradient(135deg,#061a37,#0b2f59)!important;background-blend-mode:normal!important}
.section-delivery{background:#f4f8fc}.delivery-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.delivery-grid article{position:relative;min-height:380px;overflow:hidden;background:linear-gradient(145deg,#06214a,#0b3a6d);border:0;border-radius:22px;padding:28px;color:#fff;display:flex;flex-direction:column;justify-content:flex-end}.delivery-grid img{position:absolute;inset:12px 12px auto auto;width:78%;height:230px;object-fit:contain;object-position:center;transition:transform .35s ease}.delivery-grid article:hover img{transform:translateY(-10px) scale(1.05)}.delivery-grid article:after{content:"";position:absolute;inset:0;background:linear-gradient(transparent 35%,rgba(3,18,42,.96) 80%);pointer-events:none}.delivery-grid h3,.delivery-grid p{position:relative;z-index:1}.delivery-grid h3{font-size:21px;font-weight:500;margin:0 0 12px}.delivery-grid p{color:#c3d9ef;line-height:1.8;font-size:14px;margin:0}@media(max-width:700px){.delivery-grid{grid-template-columns:1fr}.delivery-grid article{min-height:340px}}
.hero{position:relative;isolation:isolate;display:flex;align-items:center;min-height:760px;width:100%;max-width:none;padding:110px max(24px,calc((100% - var(--max))/2));overflow:hidden;background:#061a37}.hero-art{position:absolute;inset:0;width:100%;height:100%;border-radius:0;z-index:-1;background-image:linear-gradient(90deg,rgba(3,18,42,.88) 0%,rgba(3,18,42,.58) 48%,rgba(3,18,42,.28) 100%),url("hero-pcb-v2.png");background-size:cover;background-position:center}.hero-art:before{background:linear-gradient(90deg,transparent,#2d8cff,transparent);opacity:.35}.hero-copy{max-width:650px}.hero h1{color:#fff}.hero .kicker{color:#a9c6e6}.hero .lead{color:#c7d9ec}.hero-art .chip{left:auto;right:16%;top:50%;opacity:.72;transform:translateY(-50%) scale(1.35)}.hero-art i:nth-child(2){left:52%;top:22%}.hero-art i:nth-child(3){right:27%;top:30%}.hero-art i:nth-child(4){left:58%;bottom:20%}.hero-art i:nth-child(5){right:12%;bottom:28%}@media(max-width:640px){.hero{min-height:680px;padding:100px 18px 80px}.hero-art .chip{right:-8%;top:62%;transform:translateY(-50%) scale(.86);opacity:.48}.hero-copy{max-width:100%}}
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html body main #cases .case-list article{position:relative;overflow:hidden;background-size:cover;background-position:center;isolation:isolate}html body main #cases .case-list article:before{content:"";position:absolute;inset:0;background:linear-gradient(90deg,rgba(255,255,255,.96) 0%,rgba(255,255,255,.86) 58%,rgba(255,255,255,.25) 100%);z-index:-1}html body main #cases .case-list article:nth-child(1){background-image:url("industrial-blue.png")}html body main #cases .case-list article:nth-child(2){background-image:url("energy-blue.png")}html body main #cases .case-list article:nth-child(3){background-image:url("case-dashboard.png")}html body main #cases .case-list article>div,html body main #cases .case-list article>strong{position:relative;z-index:1}
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html body main #cases .case-list article{position:relative!important;display:grid!important;grid-template-columns:1fr 1fr!important;background:#082b55!important;background-image:none!important;overflow:hidden!important;min-height:300px!important}html body main #cases .case-list article:before{background:linear-gradient(90deg,#082b55 0%,#082b55 48%,#0b3768 48%,#0b3768 100%)!important;z-index:0!important}html body main #cases .case-list article:after{content:"";position:absolute!important;display:block!important;right:4%!important;top:8%!important;width:44%!important;height:84%!important;background-repeat:no-repeat!important;background-position:center!important;background-size:contain!important;opacity:.98!important;z-index:1!important;pointer-events:none!important}html body main #cases .case-list article:nth-child(1):after{background-image:url("gateway-new.png")!important}html body main #cases .case-list article:nth-child(2):after{background-image:url("energy.png")!important}html body main #cases .case-list article:nth-child(3):after{background-image:url("control-panel-new.png")!important}html body main #cases .case-list article>div{grid-column:1!important;z-index:2!important;padding:38px!important}html body main #cases .case-list article h3{font-size:23px!important}html body main #cases .case-list article p{max-width:440px!important}@media(max-width:700px){html body main #cases .case-list article{grid-template-columns:1fr!important;min-height:390px!important}html body main #cases .case-list article:before{background:linear-gradient(180deg,#082b55 0%,#082b55 48%,#0b3768 48%,#0b3768 100%)!important}html body main #cases .case-list article:after{top:48%!important;right:12%!important;width:76%!important;height:48%!important}html body main #cases .case-list article>div{grid-column:1!important;padding:24px!important;padding-bottom:200px!important}}

html body footer img{filter:none!important;opacity:1!important}
html body .semiconductor-section{background:#071d3c;color:#fff;overflow:hidden}
html body .semiconductor-wrap{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:48px}
html body .semiconductor-section .section-head p{color:#b8cee7}
html body .chip-services{display:flex;flex-wrap:wrap;gap:10px;margin-top:28px}
html body .chip-services span{border:1px solid #3974ad;border-radius:999px;padding:7px 14px;color:#9bd2ff;font-size:13px}
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html body .semiconductor-art img{width:100%;max-width:540px;filter:drop-shadow(0 18px 30px rgba(0,100,220,.25))}
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html body #extended-solutions{padding:86px 0!important}
html body .business-kicker{margin-bottom:18px;color:#2d8cff;font-size:13px;letter-spacing:.12em;font-weight:600}
html body .semiconductor-section{border-top:1px solid rgba(82,183,255,.22);border-bottom:1px solid rgba(82,183,255,.22)}
html body .semiconductor-section .business-kicker{color:#8fd2ff}
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html body .semiconductor-grid article{position:relative;min-height:320px;overflow:hidden;padding:24px;border:1px solid #214875;border-radius:16px;background:linear-gradient(160deg,#0a2b55,#061b39);color:#fff}
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html body .semiconductor-grid img{position:absolute;top:12px;right:4px;width:92%;height:170px;object-fit:contain;opacity:.9}
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html body .semiconductor-grid p{margin-top:8px;color:#c5d9ed;font-size:13px;line-height:1.75}
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html body .semiconductor-bottom{display:grid;grid-template-columns:1fr 360px;align-items:center;gap:40px;margin-top:24px;padding:30px 34px;border-radius:18px;background:linear-gradient(110deg,#0b315d,#061b39);overflow:hidden}
html body .semiconductor-bottom h3{font-size:25px;font-weight:500}
html body .semiconductor-bottom p{margin-top:12px;color:#bfd5e9;line-height:1.85}
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@media(max-width:600px){html body .semiconductor-grid{grid-template-columns:1fr}}


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html body #delivery .delivery-grid article:nth-child(2) h3,html body #delivery .delivery-grid article:nth-child(2) p{font-size:inherit!important}
html body #delivery .delivery-grid article:nth-child(2) img{content:url("control-interface-new.png")!important}