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

:root{
  --bg: #0b1220;
  --panel: #0f1a2d;
  --paper: #ffffff;
  --ink: #0f172a;
  --muted: #5b677a;
  --line: rgba(255,255,255,0.10);
  --accent: #f97316; /* orange */
  --accent2: #22c55e; /* green */
  --shadow: 0 14px 44px rgba(2, 6, 23, 0.35);
  --radius: 18px;
}

html{scroll-behavior:smooth}

body{
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Microsoft YaHei", sans-serif;
  color: var(--ink);
  background: #f6f7fb;
  line-height: 1.65;
}

img{max-width:100%; display:block}
a{color:inherit; text-decoration:none}

.wrap{
  width: 100%;
  max-width: 1140px;
  margin: 0 auto;
  padding: 0 16px;
}

.muted{color: var(--muted)}

/* Topbar */
.topbar{
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(11, 18, 32, 0.88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  color: #eef2ff;
}

.topbar-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding: 12px 0;
  gap: 10px;
}

.brand{
  display:flex;
  align-items:center;
  gap:10px;
  font-weight: 700;
  letter-spacing: 0.5px;
}

.brand-badge{
  width: 38px;
  height: 38px;
  border-radius: 14px;
  display:inline-flex;
  align-items:center;
  justify-content:center;
  background: linear-gradient(135deg, var(--accent), #fb7185);
  box-shadow: 0 12px 28px rgba(249, 115, 22, 0.22);
  color: #120a06;
  font-size: 14px;
}

.brand-name{font-size: 16px}

.nav{
  display:flex;
  align-items:center;
  gap: 18px;
}

.nav-link{
  font-size: 14px;
  opacity: 0.90;
  padding: 8px 10px;
  border-radius: 999px;
  transition: background .18s ease, opacity .18s ease;
}

.nav-link:hover{background: rgba(255,255,255,0.08); opacity: 1}
.nav-link.active{
  background: rgba(249,115,22,0.16);
  box-shadow: inset 0 0 0 1px rgba(249,115,22,0.28);
  opacity: 1;
}

/* CSS-only nav toggle */
.nav-check{display:none}
.nav-btn{display:none; cursor:pointer; padding: 10px; border-radius: 12px}
.nav-btn span{
  display:block;
  width: 22px;
  height: 2px;
  background: #eef2ff;
  margin: 5px 0;
  border-radius: 2px;
}

/* Hero */
.hero{
  background: radial-gradient(900px 440px at 20% 10%, rgba(249,115,22,0.40), rgba(11,18,32,0)),
              radial-gradient(900px 520px at 80% 0%, rgba(34,197,94,0.18), rgba(11,18,32,0)),
              linear-gradient(180deg, var(--bg), #0a1020 65%, #0a0f1d);
  color: #eef2ff;
}

.hero-split{padding: 56px 0 44px}

.hero-grid{
  display:grid;
  grid-template-columns: minmax(0, 1.05fr) minmax(0, 0.95fr);
  gap: 28px;
  align-items: center;
}

.eyebrow{
  display:inline-block;
  font-size: 12px;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: rgba(238,242,255,0.8);
  padding: 6px 12px;
  border-radius: 999px;
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.08);
  margin-bottom: 14px;
}

.hero h1{
  font-size: 34px;
  line-height: 1.22;
  margin-bottom: 14px;
}

.lead{
  font-size: 14px;
  color: rgba(238,242,255,0.86);
  max-width: 720px;
}

.hero-cta{margin-top: 18px; display:flex; gap: 10px; flex-wrap: wrap}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding: 10px 16px;
  border-radius: 999px;
  font-size: 14px;
  font-weight: 600;
  border: 1px solid transparent;
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease, border-color .18s ease;
  user-select:none;
}

.btn-primary{
  background: var(--accent);
  color: #1a0b02;
  box-shadow: 0 14px 34px rgba(249,115,22,0.28);
}
.btn-primary:hover{transform: translateY(-1px); background: #fb6a09}

.btn-ghost{
  background: rgba(255,255,255,0.06);
  border-color: rgba(255,255,255,0.12);
  color: #eef2ff;
}
.btn-ghost:hover{transform: translateY(-1px); border-color: rgba(255,255,255,0.22)}
.btn-full{width:100%}

.trust-row{
  margin-top: 18px;
  display:grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}
.trust-item{
  padding: 12px 12px;
  border-radius: 16px;
  border: 1px solid rgba(255,255,255,0.10);
  background: rgba(255,255,255,0.05);
}
.trust-k{display:block; font-size: 12px; color: rgba(238,242,255,0.72)}
.trust-v{display:block; margin-top: 2px; font-size: 13px; color: rgba(238,242,255,0.92)}

.hero-media{display:grid; gap: 12px}
.media-card{
  border-radius: 22px;
  overflow:hidden;
  box-shadow: var(--shadow);
  background: rgba(255,255,255,0.05);
  border: 1px solid rgba(255,255,255,0.10);
}
.media-card img{height: 280px; width:100%; object-fit: cover}
.media-note{
  padding: 12px 14px;
  display:flex;
  align-items:baseline;
  justify-content:space-between;
  gap: 10px;
}
.media-note strong{font-size: 14px}
.media-note span{font-size: 12px; color: rgba(238,242,255,0.72)}
.media-mini{display:grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 12px}
.media-mini img{
  height: 116px;
  object-fit: cover;
  border-radius: 18px;
  border: 1px solid rgba(255,255,255,0.10);
  box-shadow: 0 10px 26px rgba(2,6,23,0.28);
}

/* Sections */
.section{padding: 42px 0}
.section-alt{background: #f0f2f7}

.section-head{
  display:flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 16px;
}

.section-head h2{font-size: 22px}
.section-head p{font-size: 14px; color: var(--muted); max-width: 680px}
.section-actions{margin-top: 14px}
.link-arrow{color: #1f2a44; font-weight: 700}
.link-arrow:hover{text-decoration: underline}

/* Horizontal rail */
.rail{
  display:grid;
  grid-auto-flow: column;
  grid-auto-columns: minmax(240px, 1fr);
  gap: 14px;
  overflow-x: auto;
  padding-bottom: 8px;
  scroll-snap-type: x mandatory;
}
.rail::-webkit-scrollbar{height: 10px}
.rail::-webkit-scrollbar-thumb{background: rgba(15,23,42,0.14); border-radius: 999px}

.tile{
  scroll-snap-align: start;
  background: var(--paper);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: 0 10px 26px rgba(2,6,23,0.08);
  border: 1px solid rgba(2,6,23,0.06);
}
.tile h3{font-size: 16px; margin-bottom: 6px}
.tile p{font-size: 14px; color: var(--muted); margin-bottom: 10px}

.tag{
  display:inline-block;
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 999px;
  background: rgba(249,115,22,0.12);
  color: #7c2d12;
  margin-right: 6px;
  border: 1px solid rgba(249,115,22,0.20);
}

/* Steps */
.steps{
  display:grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 14px;
}
.step{
  background: var(--paper);
  border-radius: var(--radius);
  padding: 18px;
  border: 1px solid rgba(2,6,23,0.06);
  box-shadow: 0 10px 26px rgba(2,6,23,0.06);
}
.step-no{
  display:inline-block;
  font-weight: 800;
  font-size: 13px;
  letter-spacing: 1px;
  color: #7c2d12;
  background: rgba(249,115,22,0.14);
  border: 1px solid rgba(249,115,22,0.22);
  padding: 6px 10px;
  border-radius: 12px;
  margin-bottom: 10px;
}
.step h3{font-size: 16px; margin-bottom: 6px}
.step p{font-size: 14px; color: var(--muted)}

/* Banner */
.banner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: 14px;
  padding: 18px;
  border-radius: calc(var(--radius) + 4px);
  background: linear-gradient(135deg, rgba(249,115,22,0.12), rgba(34,197,94,0.10));
  border: 1px solid rgba(2,6,23,0.06);
}
.banner-copy h2{font-size: 18px; margin-bottom: 6px}
.banner-copy p{font-size: 14px; color: var(--muted)}

/* Page head (inner pages) */
.pagehead{
  background: linear-gradient(180deg, #0b1220, #0b1220 55%, #10182d);
  color: #eef2ff;
  padding: 40px 0 26px;
}
.pagehead-grid{
  display:grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.8fr);
  gap: 18px;
  align-items: center;
}
.pagehead h1{font-size: 28px; margin-bottom: 10px}
.pagehead-media img{
  border-radius: 22px;
  height: 200px;
  width: 100%;
  object-fit: cover;
  box-shadow: var(--shadow);
  border: 1px solid rgba(255,255,255,0.10);
}

/* KPI */
.kpi{
  display:grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 12px;
}
.kpi-item{
  background: var(--paper);
  border: 1px solid rgba(2,6,23,0.06);
  border-radius: var(--radius);
  padding: 16px;
  display:flex;
  align-items: baseline;
  justify-content: space-between;
}
.kpi-num{font-size: 22px; font-weight: 900; color: #111827}
.kpi-txt{font-size: 13px; color: var(--muted)}

/* Product cards */
.cards{display:grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px}
.p-card{
  overflow:hidden;
  border-radius: var(--radius);
  background: var(--paper);
  border: 1px solid rgba(2,6,23,0.06);
  box-shadow: 0 10px 26px rgba(2,6,23,0.06);
}
.p-card img{height: 180px; width: 100%; object-fit: cover}
.p-body{padding: 16px}
.p-body h3{font-size: 16px; margin-bottom: 6px}
.p-body p{font-size: 14px; color: var(--muted)}
.p-meta{margin-top: 10px}

/* Two column panels */
.two-col{display:grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px}
.panel{
  background: var(--paper);
  border: 1px solid rgba(2,6,23,0.06);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: 0 10px 26px rgba(2,6,23,0.06);
}
.panel h3{font-size: 16px; margin-bottom: 8px}
.bullets{list-style: none}
.bullets li{font-size: 14px; color: var(--muted); margin-bottom: 8px}
.bullets strong{color: #111827}

/* Standards */
.grid-3x{display:grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 14px}
.spec{
  background: var(--paper);
  border: 1px solid rgba(2,6,23,0.06);
  border-radius: var(--radius);
  padding: 18px;
  box-shadow: 0 10px 26px rgba(2,6,23,0.06);
}
.spec h3{font-size: 16px; margin-bottom: 6px}
.spec-kv{margin-top: 10px; font-size: 13px; color: #111827}
.spec-kv span{color: var(--muted); margin-right: 6px}

.meter{display:grid; gap: 12px}
.meter-row{
  background: var(--paper);
  border: 1px solid rgba(2,6,23,0.06);
  border-radius: var(--radius);
  padding: 14px;
  box-shadow: 0 10px 26px rgba(2,6,23,0.06);
}
.meter-label{display:flex; align-items:baseline; justify-content:space-between; gap: 10px; flex-wrap: wrap}
.meter-label strong{font-size: 14px}
.meter-bar{
  height: 10px;
  border-radius: 999px;
  background: rgba(15,23,42,0.10);
  overflow:hidden;
  margin-top: 10px;
}
.meter-bar span{
  display:block;
  height:100%;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--accent), #fb7185);
}

/* Scenes */
.scene{
  display:grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 14px;
  align-items: center;
  margin-bottom: 14px;
  background: var(--paper);
  border: 1px solid rgba(2,6,23,0.06);
  border-radius: calc(var(--radius) + 4px);
  overflow:hidden;
  box-shadow: 0 10px 26px rgba(2,6,23,0.06);
}
.scene.reverse{grid-template-columns: minmax(0, 1.1fr) minmax(0, 0.9fr)}
.scene.reverse .scene-media{order: 2}
.scene-media img{height: 210px; width:100%; object-fit: cover}
.scene-body{padding: 16px}
.scene-body h2{font-size: 18px; margin-bottom: 6px}
.chips{margin-top: 10px; display:flex; flex-wrap: wrap; gap: 8px}
.chip{
  font-size: 12px;
  padding: 5px 10px;
  border-radius: 999px;
  background: rgba(34,197,94,0.12);
  border: 1px solid rgba(34,197,94,0.18);
  color: #14532d;
}

/* Contact */
.contact-grid{
  display:grid;
  grid-template-columns: minmax(0, 0.9fr) minmax(0, 1.1fr);
  gap: 14px;
}
.contact-card, .form-card{
  background: var(--paper);
  border: 1px solid rgba(2,6,23,0.06);
  border-radius: calc(var(--radius) + 4px);
  padding: 18px;
  box-shadow: 0 10px 26px rgba(2,6,23,0.06);
}
.contact-card h2, .form-card h2{font-size: 18px; margin-bottom: 10px}
.contact-kv{display:grid; gap: 10px; margin: 10px 0 12px}
.contact-kv div{display:flex; align-items:baseline; justify-content:space-between; gap: 10px}
.note{
  border-radius: 14px;
  padding: 12px;
  background: rgba(249,115,22,0.10);
  border: 1px solid rgba(249,115,22,0.16);
}
.form{display:grid; gap: 10px}
.field label{display:block; font-size: 13px; color: #1f2937; margin-bottom: 4px}
.field input, .field select, .field textarea{
  width:100%;
  padding: 10px 12px;
  border-radius: 14px;
  border: 1px solid rgba(15,23,42,0.16);
  outline:none;
  font-size: 14px;
  transition: box-shadow .18s ease, border-color .18s ease;
}
.field input:focus, .field select:focus, .field textarea:focus{
  border-color: rgba(249,115,22,0.55);
  box-shadow: 0 0 0 3px rgba(249,115,22,0.16);
}

.faq{display:grid; gap: 10px}
.faq-item{
  background: var(--paper);
  border: 1px solid rgba(2,6,23,0.06);
  border-radius: var(--radius);
  padding: 12px 14px;
  box-shadow: 0 10px 26px rgba(2,6,23,0.05);
}
.faq-item summary{cursor:pointer; font-weight: 800; color: #111827}
.faq-item p{margin-top: 8px; font-size: 14px}

/* Footer */
.footer{
  background: #0b1220;
  color: rgba(238,242,255,0.86);
  margin-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.08);
}
.footer-grid{
  display:grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 0.8fr) minmax(0, 0.8fr);
  gap: 16px;
  padding: 26px 0 16px;
}
.footer h4{font-size: 14px; margin-bottom: 8px}
.footer a{display:block; font-size: 13px; padding: 4px 0; color: rgba(238,242,255,0.80)}
.footer a:hover{color: #ffffff}
.footer-brand{margin-bottom: 8px}
.footer-bottom{
  border-top: 1px solid rgba(255,255,255,0.10);
  padding: 10px 0 14px;
  color: rgba(238,242,255,0.62);
  font-size: 12px;
}

/* Responsive */
@media (max-width: 980px){
  .hero-grid{grid-template-columns: minmax(0, 1fr); gap: 18px}
  .pagehead-grid{grid-template-columns: minmax(0, 1fr)}
  .trust-row{grid-template-columns: repeat(2, minmax(0, 1fr))}
  .steps{grid-template-columns: repeat(2, minmax(0, 1fr))}
  .cards{grid-template-columns: repeat(2, minmax(0, 1fr))}
  .grid-3x{grid-template-columns: repeat(2, minmax(0, 1fr))}
  .footer-grid{grid-template-columns: minmax(0, 1fr)}
}

@media (max-width: 740px){
  .nav-btn{display:block}
  .nav{
    position: fixed;
    inset: 58px 12px auto 12px;
    display:grid;
    gap: 8px;
    padding: 12px;
    border-radius: 18px;
    background: rgba(11,18,32,0.96);
    border: 1px solid rgba(255,255,255,0.10);
    box-shadow: 0 18px 60px rgba(2,6,23,0.55);
    transform: translateY(-14px);
    opacity: 0;
    pointer-events: none;
    transition: transform .18s ease, opacity .18s ease;
  }
  .nav-link{padding: 10px 12px}
  .nav-check:checked ~ .nav{
    transform: translateY(0);
    opacity: 1;
    pointer-events: auto;
  }
  .hero h1{font-size: 28px}
  .trust-row{grid-template-columns: minmax(0, 1fr)}
  .media-card img{height: 240px}
  .media-mini img{height: 120px}
  .kpi{grid-template-columns: minmax(0, 1fr)}
  .cards{grid-template-columns: minmax(0, 1fr)}
  .two-col{grid-template-columns: minmax(0, 1fr)}
  .grid-3x{grid-template-columns: minmax(0, 1fr)}
  .scene{grid-template-columns: minmax(0, 1fr)}
  .scene.reverse{grid-template-columns: minmax(0, 1fr)}
  .scene.reverse .scene-media{order: 0}
  .scene-media img{height: 200px}
  .contact-grid{grid-template-columns: minmax(0, 1fr)}
  .banner{flex-direction: column; align-items: flex-start}
}