:root {
  --bg: #060910;
  --panel: #0b1019;
  --panel-2: #101824;
  --line: rgba(185, 205, 223, .18);
  --line-strong: rgba(207, 225, 240, .32);
  --text: #eef4f8;
  --muted: #9aaabd;
  --silver: #c8d6e2;
  --ice: #9dc3df;
  --blue: #7ea9c9;
  --shadow: rgba(0, 0, 0, .42);
  --plate: rgba(8, 14, 24, .68);
  --plate-soft: rgba(196, 221, 239, .055);
  --inset: inset 0 1px 0 rgba(255,255,255,.12), inset 0 -22px 48px rgba(2,7,14,.34);
}

* { box-sizing: border-box; }

html,
body {
  margin: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, "Microsoft YaHei", "PingFang SC", Arial, sans-serif;
}

body {
  background:
    linear-gradient(90deg, rgba(3, 7, 13, .9) 0%, rgba(5, 10, 18, .64) 42%, rgba(8, 15, 25, .35) 100%),
    radial-gradient(circle at 18% 20%, rgba(126, 169, 201, .14), transparent 34%),
    url("./assets/product-bg.png") center / cover no-repeat fixed,
    linear-gradient(135deg, #05070d 0%, #0b1019 48%, #080b12 100%);
}

body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    linear-gradient(90deg, rgba(255,255,255,.025) 1px, transparent 1px),
    linear-gradient(0deg, rgba(255,255,255,.018) 1px, transparent 1px);
  background-size: 92px 92px;
  mask-image: linear-gradient(90deg, rgba(0,0,0,.75), rgba(0,0,0,.2));
  opacity: .42;
  z-index: 0;
}

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

.h-scroll {
  position: relative;
  z-index: 1;
  display: flex;
  width: 100vw;
  height: 100vh;
  overflow-x: auto;
  overflow-y: hidden;
  scroll-snap-type: x mandatory;
  scroll-behavior: smooth;
}

.h-scroll::-webkit-scrollbar { height: 8px; }
.h-scroll::-webkit-scrollbar-track { background: #070b12; }
.h-scroll::-webkit-scrollbar-thumb { background: rgba(200, 214, 226, .35); border-radius: 999px; }

.panel {
  position: relative;
  flex: 0 0 100vw;
  height: 100vh;
  padding: 5.2vh 5.6vw;
  scroll-snap-align: start;
  border-right: 1px solid var(--line);
  background:
    linear-gradient(90deg, rgba(255,255,255,.032), transparent 24%, transparent 72%, rgba(157,195,223,.05)),
    linear-gradient(180deg, rgba(255,255,255,.025), rgba(255,255,255,0));
}

.panel::after {
  content: "";
  position: absolute;
  inset: 24px;
  pointer-events: none;
  border: 1px solid rgba(207, 225, 240, .12);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,.08),
    inset 0 -1px 0 rgba(0,0,0,.42);
}

.top-nav,
.nav-actions,
.hero-meta,
.value-grid,
.case-grid,
.price-grid,
.contact-actions {
  display: flex;
  align-items: center;
}

.top-nav {
  justify-content: space-between;
  gap: 28px;
  min-height: 48px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  color: var(--silver);
  letter-spacing: .02em;
  font-size: 14px;
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  border: 1px solid var(--line-strong);
  color: var(--text);
  background: linear-gradient(145deg, rgba(255,255,255,.1), rgba(255,255,255,.018));
  box-shadow: var(--inset), 0 18px 36px rgba(0,0,0,.22);
}

.brand-logo {
  display: block;
  filter: drop-shadow(0 10px 22px rgba(112, 171, 214, .24));
}

.nav-actions { gap: 14px; color: var(--muted); font-size: 13px; }

.primary-btn,
.soft-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 0 18px;
  border: 1px solid var(--line-strong);
  box-shadow: var(--inset), 0 14px 32px rgba(0,0,0,.18);
  transition: transform .18s ease, border-color .18s ease, background .18s ease, box-shadow .18s ease;
}

.primary-btn {
  color: #071019;
  background: linear-gradient(135deg, var(--silver), var(--ice));
}

.soft-btn {
  color: var(--silver);
  background: linear-gradient(145deg, rgba(255,255,255,.075), rgba(255,255,255,.022));
  backdrop-filter: blur(16px);
}

.primary-btn:hover,
.soft-btn:hover,
.value-card:hover,
.case-grid article:hover,
.price-grid article:hover {
  transform: translateY(-4px);
  border-color: rgba(220, 235, 246, .58);
  box-shadow: var(--inset), 0 26px 60px rgba(0,0,0,.28);
}

.hero-content {
  width: min(760px, 54vw);
  margin-top: 14vh;
}

.eyebrow {
  margin: 0 0 16px;
  color: var(--ice);
  font-size: 12px;
  letter-spacing: .18em;
  text-transform: uppercase;
}

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

h1 {
  margin-bottom: 28px;
  font-weight: 300;
  font-size: clamp(48px, 5.6vw, 92px);
  line-height: .98;
  letter-spacing: -.03em;
}

h2 {
  max-width: 860px;
  font-weight: 300;
  font-size: clamp(34px, 3.5vw, 58px);
  line-height: 1.08;
  letter-spacing: -.025em;
}

h3 {
  color: var(--text);
  font-weight: 500;
  letter-spacing: -.01em;
}

.lead {
  max-width: 700px;
  color: var(--silver);
  font-size: 18px;
  line-height: 1.8;
}

.hero-meta {
  flex-wrap: wrap;
  gap: 12px;
  margin-top: 34px;
}

.hero-meta span,
.scroll-tip {
  border: 1px solid var(--line);
  color: var(--muted);
  background: rgba(255,255,255,.035);
}

.hero-meta span {
  padding: 9px 14px;
  font-size: 12px;
}

.hero-console {
  position: absolute;
  right: 7vw;
  bottom: 12vh;
  width: 360px;
  border: 1px solid var(--line);
  background: linear-gradient(145deg, rgba(18, 29, 44, .78), rgba(6, 12, 22, .66));
  box-shadow:
    var(--inset),
    18px 26px 80px rgba(0,0,0,.42),
    -14px -12px 34px rgba(177, 214, 242, .055);
  backdrop-filter: blur(18px);
}

.hero-console div {
  display: grid;
  grid-template-columns: 72px 1fr;
  gap: 18px;
  padding: 22px;
  border-bottom: 1px solid var(--line);
}

.hero-console div:last-child { border-bottom: 0; }
.hero-console strong { color: var(--ice); font-weight: 400; }
.hero-console span { color: var(--silver); line-height: 1.55; }

.section-head { margin-bottom: 52px; }

.value-grid,
.case-grid,
.price-grid {
  gap: 28px;
  align-items: stretch;
}

.value-card,
.case-grid article,
.price-grid article,
.feature-column article,
.contact-box {
  border: 1px solid var(--line);
  background:
    linear-gradient(145deg, rgba(255,255,255,.076), rgba(255,255,255,.018) 46%, rgba(4,10,19,.22)),
    var(--plate);
  box-shadow:
    var(--inset),
    16px 22px 58px rgba(0,0,0,.32),
    -10px -10px 28px rgba(184, 214, 238, .045);
  backdrop-filter: blur(18px);
  transition: transform .18s ease, border-color .18s ease, box-shadow .18s ease;
}

.value-card {
  width: 28vw;
  min-height: 300px;
  padding: 34px;
}

.value-card span {
  display: block;
  margin-bottom: 54px;
  color: var(--ice);
  font-size: 13px;
}

.value-card h3,
.case-grid h3,
.price-grid h3,
.feature-column h3 { font-size: 22px; }

.value-card p,
.case-grid p,
.price-grid li,
.feature-column p,
.contact-box p {
  color: var(--muted);
  line-height: 1.72;
}

.feature-layout {
  display: grid;
  grid-template-columns: 1fr 420px 1fr;
  gap: 32px;
  align-items: center;
}

.feature-column {
  display: grid;
  gap: 16px;
}

.feature-column article {
  padding: 22px;
}

.feature-column h3 {
  margin-bottom: 8px;
}

.feature-visual {
  display: grid;
  place-items: center;
}

.screen {
  width: 400px;
  height: 520px;
  padding: 24px;
  border: 1px solid var(--line-strong);
  background:
    linear-gradient(160deg, rgba(232,242,248,.12), rgba(255,255,255,.025)),
    rgba(9, 16, 27, .72);
  box-shadow:
    var(--inset),
    0 30px 120px rgba(0,0,0,.42),
    -16px -14px 48px rgba(157,195,223,.08);
  backdrop-filter: blur(20px);
}

.screen-top {
  display: flex;
  gap: 8px;
  margin-bottom: 40px;
}

.screen-top span {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--silver);
  opacity: .6;
}

.screen-line {
  height: 12px;
  width: 62%;
  margin-bottom: 14px;
  background: rgba(200,214,226,.22);
}

.screen-line.wide {
  width: 86%;
}

.screen-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
  margin-top: 34px;
}

.screen-grid i {
  height: 92px;
  border: 1px solid var(--line);
  background: linear-gradient(145deg, rgba(255,255,255,.06), rgba(255,255,255,.018));
  box-shadow: inset 0 1px 0 rgba(255,255,255,.08), inset 0 -14px 26px rgba(0,0,0,.22);
}

.screen-callout {
  margin-top: 28px;
  padding: 16px;
  border: 1px solid rgba(157,195,223,.5);
  color: var(--silver);
}

.case-grid article,
.price-grid article {
  width: 27vw;
  min-height: 330px;
  padding: 30px;
}

.case-grid span {
  display: inline-block;
  margin-top: 30px;
  padding-top: 18px;
  width: 100%;
  border-top: 1px solid var(--line);
  color: var(--ice);
}

.price-grid article {
  display: flex;
  flex-direction: column;
}

.price-grid .featured {
  border-color: rgba(200,214,226,.62);
  background:
    linear-gradient(145deg, rgba(220,235,246,.13), rgba(255,255,255,.028) 48%, rgba(8,15,25,.35)),
    rgba(22, 31, 45, .82);
}

.price-grid strong {
  margin: 10px 0 24px;
  color: var(--silver);
  font-size: 28px;
  font-weight: 300;
}

.price-grid ul {
  margin: auto 0 0;
  padding: 0;
  list-style: none;
}

.price-grid li {
  padding: 11px 0;
  border-top: 1px solid var(--line);
}

.contact {
  display: grid;
  place-items: center;
}

.contact-box {
  width: min(900px, 70vw);
  padding: 56px;
  text-align: center;
}

.contact-box h2 {
  margin-left: auto;
  margin-right: auto;
}

.contact-actions {
  justify-content: center;
  gap: 16px;
  margin: 36px 0 42px;
}

.contact footer {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 18px;
  padding-top: 26px;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 12px;
}

.scroll-tip {
  position: fixed;
  right: 26px;
  bottom: 22px;
  padding: 9px 12px;
  color: var(--muted);
  font-size: 12px;
  backdrop-filter: blur(10px);
  box-shadow: var(--inset), 0 14px 34px rgba(0,0,0,.22);
}

@media (max-width: 1100px) {
  body { overflow: auto; }
  .h-scroll {
    display: block;
    height: auto;
    overflow: visible;
    scroll-snap-type: none;
  }
  .panel {
    min-height: 100vh;
    height: auto;
  }
  .hero-content,
  .contact-box { width: 100%; }
  .hero-console { position: static; margin-top: 48px; width: 100%; }
  .value-grid,
  .case-grid,
  .price-grid,
  .feature-layout { display: grid; grid-template-columns: 1fr; }
  .value-card,
  .case-grid article,
  .price-grid article { width: 100%; }
  .feature-visual { display: none; }
  .scroll-tip { display: none; }
}