:root {
  --bg: #f4f8fb;
  --card: #ffffff;
  --ink: #102033;
  --muted: #5b687a;
  --brand: #07c160;
  --brand-2: #00a8ff;
  --dark: #061421;
  --line: rgba(16, 32, 51, .1);
  --shadow: 0 20px 55px rgba(8, 28, 48, .12);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.65;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

.hero {
  position: relative;
  min-height: 100vh;
  padding: max(16px, env(safe-area-inset-top)) 22px 64px;
  color: #fff;
  overflow: hidden;
  background: radial-gradient(circle at 18% 18%, rgba(7,193,96,.42), transparent 28%), radial-gradient(circle at 80% 18%, rgba(0,168,255,.28), transparent 32%), linear-gradient(140deg, #061421, #082a3f 58%, #073823);
}
.hero__bg {
  position: absolute;
  inset: 0;
  background: linear-gradient(90deg, rgba(6,20,33,.92), rgba(6,20,33,.72)), url("./assets/site-hero-bg.jpg") center/cover no-repeat;
  opacity: .9;
}
.nav, .hero__wrap { position: relative; z-index: 1; }
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 18px;
  max-width: 1200px;
  margin: 0 auto;
}
.brand, .nav__links { display: inline-flex; align-items: center; }
.brand { gap: 8px; font-weight: 900; letter-spacing: .04em; }
.brand__logo {
  display: inline-grid;
  place-items: center;
  width: 36px;
  height: 36px;
  border-radius: 12px;
  color: #062214;
  background: linear-gradient(135deg, #41f08b, #07c160);
  font-style: normal;
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0;
}
.nav__links { gap: 18px; color: rgba(255,255,255,.82); font-size: 14px; }
.nav__cta {
  padding: 8px 14px;
  border: 1px solid rgba(255,255,255,.35);
  border-radius: 999px;
  backdrop-filter: blur(8px);
}
.hero__wrap {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 520px;
  align-items: center;
  gap: 46px;
  max-width: 1200px;
  margin: 82px auto 0;
}
.hero h1 {
  margin: 0;
  max-width: 820px;
  font-size: clamp(42px, 7vw, 82px);
  line-height: 1.05;
  letter-spacing: -.06em;
}
.lead { max-width: 720px; margin: 22px 0 0; color: rgba(255,255,255,.84); font-size: 18px; }
.eyebrow {
  margin: 0 0 10px;
  color: var(--brand);
  font-size: 12px;
  font-weight: 900;
  text-transform: uppercase;
  letter-spacing: .16em;
}
.hero__actions { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 30px; }
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  padding: 0 23px;
  border-radius: 999px;
  border: 0;
  font-weight: 900;
}
.btn--primary { color: #062214; background: linear-gradient(135deg, #41f08b, #07c160); box-shadow: 0 12px 28px rgba(7,193,96,.28); }
.btn--ghost { color: #fff; border: 1px solid rgba(255,255,255,.28); background: rgba(255,255,255,.08); }
.metrics {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin-top: 44px;
}
.metrics div {
  padding: 16px;
  border: 1px solid rgba(255,255,255,.16);
  border-radius: 20px;
  background: rgba(255,255,255,.08);
  backdrop-filter: blur(10px);
}
.metrics strong { display: block; font-size: 22px; }
.metrics span { color: rgba(255,255,255,.72); font-size: 13px; }
.hero__visual { position: relative; padding: 12px; border-radius: 38px; background: rgba(255,255,255,.12); backdrop-filter: blur(12px); box-shadow: 0 24px 80px rgba(0,0,0,.28); }
.hero__visual img { width: 100%; aspect-ratio: 16/10; object-fit: cover; object-position: center; border-radius: 28px; background: rgba(255,255,255,.94); }
.hero__badge { position: static; margin-top: 12px; padding: 16px 18px; border-radius: 22px; background: rgba(255,255,255,.94); color: var(--ink); box-shadow: 0 12px 30px rgba(0,0,0,.16); }
.hero__badge b, .hero__badge span { display: block; }
.hero__badge span { color: var(--muted); font-size: 13px; }

.section { max-width: 1200px; margin: 0 auto; padding: 78px 22px; }
.center { margin-left: auto; margin-right: auto; text-align: center; }
.section__head { max-width: 850px; margin-bottom: 30px; }
.section__head h2, .split h2, .image-band h2, .cta h2 {
  margin: 0 0 12px;
  font-size: clamp(30px, 5vw, 50px);
  line-height: 1.12;
  letter-spacing: -.04em;
}
.section__head p:not(.eyebrow), .split p, .image-band li, .image-band p, .cta p { color: var(--muted); }
.feature-grid, .platform-grid, .service-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 16px;
}
.feature-grid--six { grid-template-columns: repeat(6, minmax(0, 1fr)); }
.feature-card, .platform-card, .model-card, .contact-card, .qr-card, .tips details, .service-grid div, .hardware-grid article, .scenario-grid article {
  border: 1px solid var(--line);
  border-radius: 26px;
  background: var(--card);
  box-shadow: var(--shadow);
}
.feature-card { padding: 22px; }
.icon { color: var(--brand-2); font-weight: 900; }
.feature-card h3, .platform-card h3, .model-card h3 { margin: 10px 0 6px; }
.feature-card p, .platform-card p, .model-card p { margin: 0; color: var(--muted); font-size: 14px; }

.split {
  display: grid;
  grid-template-columns: .95fr 1.05fr;
  gap: 34px;
  align-items: center;
}
.flow-visual img { width: 100%; border-radius: 30px; box-shadow: var(--shadow); background: #fff; }
.steps { display: grid; gap: 14px; margin-top: 20px; }
.step { display: grid; grid-template-columns: 54px 1fr; gap: 14px; padding: 18px; border-radius: 22px; background: #fff; border: 1px solid var(--line); }
.step b { display: grid; place-items: center; width: 46px; height: 46px; border-radius: 50%; color: #fff; background: var(--dark); }
.step h3, .step p { margin: 0; }

.dark {
  max-width: none;
  padding-left: max(22px, calc((100vw - 1200px) / 2));
  padding-right: max(22px, calc((100vw - 1200px) / 2));
  color: #fff;
  background: linear-gradient(145deg, #061421, #0b2b42);
}
.dark-compact { padding-top: 64px; padding-bottom: 64px; }
.section__head--light p:not(.eyebrow) { color: rgba(255,255,255,.7); }
.platform-card, .service-grid div { padding: 22px; background: rgba(255,255,255,.07); border-color: rgba(255,255,255,.12); box-shadow: none; }
.platform-card p, .service-grid span { color: rgba(255,255,255,.72); }
.service-grid b, .service-grid span { display: block; }
.service-grid b { margin-bottom: 6px; }

.image-band {
  display: grid;
  grid-template-columns: 1.08fr .92fr;
  gap: 0;
  overflow: hidden;
  border-radius: 34px;
  background: #fff;
  box-shadow: var(--shadow);
  padding: 0;
}
.image-band.reverse { grid-template-columns: .95fr 1.05fr; }
.image-band.reverse img { order: 2; }
.image-band img { width: 100%; height: 100%; min-height: 410px; object-fit: cover; }
.image-band__text { padding: 38px; }
.check-list { padding-left: 0; list-style: none; }
.check-list li { position: relative; padding-left: 24px; margin: 8px 0; }
.check-list li::before { content: "✓"; position: absolute; left: 0; color: var(--brand); font-weight: 900; }

.model-cards { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 16px; }
.model-card { overflow: hidden; }
.model-card img { width: 100%; height: 260px; object-fit: contain; background: linear-gradient(180deg, #f8fbfd, #eef5f8); }
.model-card div { padding: 20px; }
.model-card span { display: inline-flex; margin-top: 14px; color: #047a3d; font-size: 13px; font-weight: 900; }
.table-wrap { margin-top: 22px; overflow-x: auto; border-radius: 24px; box-shadow: var(--shadow); background: #fff; }
table { width: 100%; min-width: 840px; border-collapse: collapse; font-size: 14px; }
th, td { padding: 15px 16px; text-align: left; border-bottom: 1px solid var(--line); }
th { background: #eaf7f1; color: #063f24; }
tr:last-child td { border-bottom: 0; }

.scenario-grid { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px; margin-bottom: 24px; }
.scenario-grid article { padding: 20px; box-shadow: 0 12px 34px rgba(8,28,48,.08); }
.scenario-grid b, .scenario-grid span { display: block; }
.scenario-grid b { margin-bottom: 8px; font-size: 17px; }
.scenario-grid span { color: var(--muted); font-size: 14px; }
.wide-img { width: 100%; max-height: 520px; object-fit: cover; border-radius: 34px; box-shadow: var(--shadow); }
.hardware-layout { display: grid; grid-template-columns: .9fr 1.1fr; gap: 22px; align-items: stretch; }
.hardware-layout > img { width: 100%; height: 100%; min-height: 560px; object-fit: cover; border-radius: 34px; box-shadow: var(--shadow); }
.hardware-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.hardware-grid article { padding: 20px; box-shadow: 0 12px 34px rgba(8,28,48,.08); }
.hardware-grid b, .hardware-grid span { display: block; }
.hardware-grid b { margin-bottom: 8px; }
.hardware-grid span { color: var(--muted); font-size: 14px; }
.hardware-tags { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 20px; }
.hardware-tags span { padding: 8px 12px; border-radius: 999px; background: #e8f6ef; color: #05743b; font-weight: 900; font-size: 13px; }
.tips { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 12px; }
.tips details { padding: 18px 20px; box-shadow: none; }
.tips summary { cursor: pointer; font-weight: 900; }
.tips p { margin: 10px 0 0; color: var(--muted); }

.cta { text-align: center; padding-bottom: 92px; }
.contact-panel { display: grid; grid-template-columns: minmax(0, 1fr) 230px; gap: 16px; max-width: 850px; margin: 28px auto 0; align-items: stretch; }
.contact-card { display: flex; align-items: center; justify-content: space-between; gap: 16px; padding: 24px; text-align: left; }
.qr-card { display: grid; justify-items: center; gap: 8px; padding: 18px; text-align: center; }
.qr-card img { width: 150px; height: 150px; padding: 8px; border-radius: 18px; object-fit: contain; background: #fff; border: 1px solid var(--line); }
.contact-card strong, .contact-card span, .contact-card em, .qr-card strong, .qr-card span { display: block; }
.contact-card span, .contact-card em, .qr-card span, .note { color: var(--muted); font-size: 13px; }
.contact-card em { margin-top: 4px; font-style: normal; }
.float-top { position: fixed; right: 16px; bottom: calc(18px + env(safe-area-inset-bottom)); width: 44px; height: 44px; border: 0; border-radius: 50%; color: #fff; background: rgba(6,20,33,.88); box-shadow: var(--shadow); opacity: 0; pointer-events: none; transition: .2s; }
.float-top.show { opacity: 1; pointer-events: auto; }

@media (max-width: 1060px) {
  .hero__wrap, .split { grid-template-columns: 1fr; }
  .hero__visual { max-width: 560px; }
  .feature-grid--six, .model-cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .metrics { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 820px) {
  .hero { min-height: auto; padding-left: 18px; padding-right: 18px; }
  .nav__links a:not(.nav__cta) { display: none; }
  .hero__wrap { margin-top: 54px; gap: 30px; }
  .hero__visual img { aspect-ratio: 16/10; }
  .hero__badge { margin-top: 10px; }
  .section { padding: 56px 18px; }
  .feature-grid, .feature-grid--six, .platform-grid, .model-cards, .service-grid, .tips, .image-band, .image-band.reverse, .scenario-grid, .contact-panel, .hardware-layout, .hardware-grid { grid-template-columns: 1fr; }
  .image-band { margin-left: 18px; margin-right: 18px; }
  .image-band.reverse img { order: 0; }
  .image-band img { min-height: 240px; }
  .image-band__text { padding: 26px; }
  .model-card img { height: 300px; }
  .contact-card { align-items: stretch; flex-direction: column; }
  .contact-card .btn { width: 100%; }
  .qr-card img { width: 168px; height: 168px; }
}
@media (max-width: 520px) {
  .metrics { grid-template-columns: 1fr; }
  .hardware-layout > img { min-height: 360px; }
  .hero h1 { font-size: 40px; }
  .lead { font-size: 16px; }
}