:root {
  --bg0: #07101c;
  --bg1: #0c1728;
  --bg2: #132036;
  --bg-lift: #182844;
  --line: rgba(148, 163, 184, 0.16);
  --text: #eef3fb;
  --muted: #93a6be;
  --accent: #2dd4bf;
  --accent-deep: #14b8a6;
  --accent2: #f59e0b;
  --violet: #8ba4ff;
  --success: #34d399;
  --warn: #fbbf24;
  --danger: #fb7185;
  --card: rgba(255, 255, 255, 0.035);
  --shadow: 0 22px 60px rgba(2, 8, 18, 0.35);
  --radius: 22px;
  --radius-sm: 14px;
  --max: 1200px;
  --gutter: 24px;
  --font: "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background:
    radial-gradient(980px 520px at 8% -8%, rgba(45, 212, 191, 0.16), transparent 58%),
    radial-gradient(720px 420px at 92% 0%, rgba(139, 164, 255, 0.12), transparent 52%),
    linear-gradient(180deg, var(--bg0), var(--bg1) 42%, #070e18 100%);
  min-height: 100vh;
  line-height: 1.7;
}
img, svg { max-width: 100%; height: auto; display: block; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
:focus-visible {
  outline: 2px solid rgba(45, 212, 191, 0.7);
  outline-offset: 3px;
}

.skip-link {
  position: absolute;
  left: 1rem;
  top: -3rem;
  z-index: 40;
  padding: 0.55rem 0.9rem;
  border-radius: 999px;
  background: var(--accent);
  color: #042f2e;
  font-weight: 700;
}
.skip-link:focus { top: 0.8rem; }

.wrap { width: min(var(--max), calc(100% - 2rem)); margin: 0 auto; }

.nav {
  position: sticky; top: 0; z-index: 20;
  backdrop-filter: blur(16px);
  background: rgba(7, 16, 28, 0.78);
  border-bottom: 1px solid var(--line);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 0.75rem 1rem; padding: 0.9rem 0;
}
.brand {
  font-weight: 800;
  letter-spacing: 0.02em;
  color: var(--text);
  font-size: 1.28rem;
  text-decoration: none;
}
.brand span { color: var(--accent); }
.nav-toggle {
  display: none;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
  border-radius: 999px;
  padding: 0.48rem 0.9rem;
  font: inherit;
  font-size: 0.88rem;
  cursor: pointer;
}
.nav-links { display: flex; flex-wrap: wrap; gap: 0.5rem 0.9rem; align-items: center; }
.nav-links a { color: var(--muted); text-decoration: none; font-size: 0.92rem; white-space: nowrap; }
.nav-links a:hover, .nav-links a.active { color: var(--text); }
.nav-links .btn { padding: 0.62rem 1.05rem; font-size: 0.88rem; }

.btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 0.4rem;
  border: 0; border-radius: 999px;
  padding: 0.82rem 1.3rem;
  font-weight: 700;
  font-family: inherit;
  cursor: pointer;
  text-decoration: none !important;
  transition: transform .18s ease, box-shadow .18s ease, background .18s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary {
  background: linear-gradient(135deg, var(--accent), var(--accent-deep));
  color: #042f2e !important;
  box-shadow: 0 12px 32px rgba(45, 212, 191, 0.22);
}
.btn-secondary {
  background: transparent;
  color: var(--text) !important;
  border: 1px solid var(--line);
}
.btn-amber {
  background: linear-gradient(135deg, var(--accent2), #d97706);
  color: #1c1205 !important;
}

.hero {
  padding: 5rem 0 3.4rem;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 3rem;
  align-items: center;
}
.eyebrow {
  display: inline-block;
  color: var(--accent);
  font-weight: 700;
  font-size: 0.84rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 0.9rem;
}
h1, h2, h3 { font-family: var(--font); line-height: 1.28; margin: 0 0 0.85rem; font-feature-settings: "tnum" 1; }
h1 { font-size: clamp(2.35rem, 5vw, 3.55rem); font-weight: 800; letter-spacing: -0.02em; }
h2 { font-size: clamp(1.7rem, 3vw, 2.25rem); font-weight: 730; }
h3 { font-size: 1.16rem; font-weight: 700; }
.lead { color: var(--muted); font-size: 1.08rem; max-width: 38rem; margin: 0 0 1.6rem; }
.cta-row { display: flex; flex-wrap: wrap; gap: 0.75rem; margin-bottom: 1rem; }
.tiny { color: var(--muted); font-size: 0.85rem; }

.hero-visual {
  position: relative;
  min-height: 360px;
  border-radius: 28px;
  overflow: hidden;
  box-shadow: var(--shadow);
  background:
    linear-gradient(160deg, rgba(45, 212, 191, 0.1), transparent 42%),
    linear-gradient(210deg, rgba(139, 164, 255, 0.1), transparent 38%),
    var(--bg2);
}
.hero-visual img, .hero-visual svg { width: 100%; height: 100%; object-fit: cover; }

.section { padding: 4rem 0; }
.section.alt {
  margin: 0 calc(50% - 50vw);
  padding-left: calc(50vw - 50%);
  padding-right: calc(50vw - 50%);
  background:
    linear-gradient(180deg, rgba(24, 40, 68, 0.35), rgba(7, 16, 28, 0.2));
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
}
.section.alt .wrap, .section.alt > .section-head { width: min(var(--max), calc(100% - 2rem)); margin-left: auto; margin-right: auto; }
.section-head { margin-bottom: 1.8rem; max-width: 40rem; }
.section-head p { color: var(--muted); margin: 0; }

.grid-2, .grid-3, .grid-4 {
  display: grid;
  gap: 1.1rem;
}
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card {
  background: var(--card);
  border: 1px solid transparent;
  border-radius: var(--radius);
  padding: 1.3rem 1.35rem;
}
.card.lift {
  background: linear-gradient(180deg, rgba(255,255,255,0.05), rgba(255,255,255,0.025));
  box-shadow: var(--shadow);
}
.card p { color: var(--muted); margin: 0; font-size: 0.96rem; }
.card a { text-decoration: none; color: inherit; }
.num {
  width: 2rem; height: 2rem; border-radius: 999px;
  display: inline-flex; align-items: center; justify-content: center;
  background: rgba(45, 212, 191, 0.14); color: var(--accent);
  font-weight: 700; margin-bottom: 0.75rem; font-size: 0.86rem;
  font-variant-numeric: tabular-nums;
}

.matrix { display: grid; gap: 1.4rem; }
.matrix-group h3 { margin-bottom: 0.8rem; color: var(--text); }
.matrix-group .grid-3 { gap: 0.9rem; }
.matrix-item {
  padding: 1.15rem 1.15rem 1.2rem;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.03);
  min-height: 8.4rem;
}
.matrix-item span {
  display: block;
  color: var(--accent);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  margin-bottom: 0.45rem;
}
.matrix-item strong { display: block; margin-bottom: 0.35rem; }
.matrix-item p { margin: 0; color: var(--muted); font-size: 0.92rem; }

.value-strip {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0.9rem;
}
.value-item {
  padding: 1.15rem 1rem 1.2rem;
  border-radius: var(--radius);
  background: linear-gradient(180deg, rgba(45, 212, 191, 0.08), rgba(255,255,255,0.02));
}
.value-item strong {
  display: block;
  font-size: 1.02rem;
  margin-bottom: 0.3rem;
}
.value-item span { color: var(--muted); font-size: 0.86rem; }

.compare {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  overflow: hidden;
  border-radius: 28px;
}
.compare-col { padding: 1.5rem 1.4rem; }
.compare-col.old { background: rgba(251, 113, 133, 0.06); }
.compare-col.new { background: rgba(45, 212, 191, 0.08); }
.compare-col h3 { margin-bottom: 1rem; }
.compare-col li { color: var(--muted); margin: 0.55rem 0; }
.compare-col ul { margin: 0; padding-left: 1.1rem; }

.table-wrap {
  overflow-x: auto;
  border-radius: var(--radius);
  background: var(--card);
}
.table-hint { display: none; color: var(--muted); font-size: 0.8rem; margin-bottom: 0.55rem; }
table { width: 100%; border-collapse: collapse; min-width: 560px; }
th, td { text-align: left; padding: 0.9rem 1rem; border-bottom: 1px solid var(--line); font-size: 0.95rem; }
th { color: var(--muted); font-weight: 600; background: rgba(0,0,0,.14); }
td { color: var(--text); }
tr:last-child td { border-bottom: 0; }

.steps, .timeline {
  display: grid;
  gap: 0.75rem;
}
.timeline {
  grid-template-columns: repeat(6, 1fr);
}
.step, .timeline-item {
  padding: 1rem 1.1rem;
  border-radius: var(--radius);
  background: var(--card);
}
.step { display: grid; grid-template-columns: auto 1fr; gap: 1rem; }
.step-n, .timeline-item .step-n {
  font-weight: 800; color: var(--accent2);
  font-size: 1.2rem; min-width: 1.6rem;
  font-variant-numeric: tabular-nums;
}
.timeline-item p { margin: 0; color: var(--muted); font-size: 0.9rem; }

.bento {
  display: grid;
  grid-template-columns: 1.35fr 1fr 1fr;
  grid-template-rows: auto auto;
  gap: 1rem;
}
.bento .wide { grid-column: 1 / 2; grid-row: 1 / 3; }
.panel {
  padding: 1.4rem;
  border-radius: var(--radius);
  background: var(--card);
}
.panel.featured {
  background:
    linear-gradient(165deg, rgba(45, 212, 191, 0.14), rgba(255,255,255,0.03));
  box-shadow: var(--shadow);
}
.panel p { color: var(--muted); margin: 0; }

.visual-frame {
  border-radius: 24px;
  overflow: hidden;
  background: var(--bg2);
  box-shadow: var(--shadow);
}
.visual-frame figcaption {
  padding: 0.85rem 1.1rem 1.1rem;
  color: var(--muted);
  font-size: 0.88rem;
}

.flow {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.8rem;
}
.flow-step {
  position: relative;
  padding: 1.15rem 1.05rem;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.03);
}
.flow-step strong { display: block; margin-bottom: 0.3rem; }
.flow-step p { margin: 0; color: var(--muted); font-size: 0.9rem; }

.swim {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.swim-col {
  padding: 1.25rem 1.2rem;
  border-radius: var(--radius);
  background: var(--card);
}
.swim-col.in { background: rgba(139, 164, 255, 0.08); }
.swim-col.out { background: rgba(45, 212, 191, 0.08); }
.swim-col p { color: var(--muted); margin: 0; }

.state-flow {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  align-items: center;
}
.state-flow span {
  padding: 0.45rem 0.8rem;
  border-radius: 999px;
  background: rgba(45, 212, 191, 0.12);
  color: var(--text);
  font-size: 0.88rem;
}
.state-flow i {
  color: var(--accent);
  font-style: normal;
}

.layers {
  display: grid;
  gap: 0.7rem;
}
.layer {
  display: grid;
  grid-template-columns: 8.5rem 1fr;
  gap: 1rem;
  padding: 1rem 1.15rem;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,0.03);
}
.layer strong { color: var(--accent); }
.layer p { margin: 0; color: var(--muted); }

.sandbox {
  display: grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap: 1rem;
}
.sandbox-box {
  padding: 1.3rem;
  border-radius: var(--radius);
  background: var(--card);
}
.sandbox-box.wide { outline: 1px dashed rgba(45, 212, 191, 0.28); }

.story {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.story-card {
  padding: 1.4rem 1.35rem;
  border-radius: var(--radius);
  background: var(--card);
}
.story-card dl { margin: 0; }
.story-card dt {
  color: var(--accent);
  font-size: 0.78rem;
  letter-spacing: 0.08em;
  margin: 0.85rem 0 0.25rem;
}
.story-card dt:first-child { margin-top: 0; }
.story-card dd { margin: 0; color: var(--muted); }

.chips {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.55rem;
}
.chip {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem 0.8rem;
  border-radius: 999px;
  background: rgba(255,255,255,0.04);
  color: var(--text);
  cursor: pointer;
}
.chip input {
  accent-color: var(--accent);
  width: 1rem;
  height: 1rem;
  margin: 0;
}

.howto {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  margin-bottom: 1rem;
}
.howto div {
  padding: 0.9rem 1rem;
  border-radius: var(--radius-sm);
  background: rgba(45, 212, 191, 0.08);
}
.howto strong { display: block; margin-bottom: 0.2rem; }
.howto span { color: var(--muted); font-size: 0.86rem; }

.form {
  display: grid; gap: 0.85rem;
  padding: 1.45rem;
  border-radius: var(--radius);
  background: var(--card);
}
.form label, .form .field { display: grid; gap: 0.35rem; font-size: 0.9rem; color: var(--muted); }
.form .field-label { color: var(--muted); }
.form input:not([type="checkbox"]):not([type="radio"]),
.form select, .form textarea {
  width: 100%;
  border: 1px solid var(--line);
  background: rgba(0,0,0,.25);
  color: var(--text);
  border-radius: 12px;
  padding: 0.72rem 0.85rem;
  font: inherit;
}
.form input:focus, .form select:focus, .form textarea:focus {
  outline: 2px solid rgba(45, 212, 191, 0.35);
  border-color: var(--accent);
}
.form-note { color: var(--muted); font-size: 0.85rem; }

.contact-grid {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 1.5rem;
  align-items: start;
}
.qr-box {
  border-radius: var(--radius);
  padding: 1.5rem;
  text-align: center;
  background: rgba(45, 212, 191, 0.06);
  min-height: 260px;
  display: grid;
  place-content: center;
  gap: 0.6rem;
}
.qr-box img {
  width: 168px; height: 168px; margin: 0 auto;
  border-radius: 16px; object-fit: contain;
  background: #fff;
}

.banner {
  margin: 1rem 0 0;
  padding: 1.5rem 1.55rem;
  border-radius: var(--radius);
  background: linear-gradient(110deg, rgba(245, 158, 11, 0.12), rgba(45, 212, 191, 0.08));
  display: flex; flex-wrap: wrap; gap: 1rem; align-items: center; justify-content: space-between;
}
.banner p { margin: 0; color: var(--muted); max-width: 36rem; }

.footer {
  margin-top: 3rem;
  border-top: 1px solid var(--line);
  padding: 1.6rem 0 2.3rem;
  color: var(--muted);
  font-size: 0.9rem;
}
.footer-inner { display: flex; flex-wrap: wrap; gap: 0.75rem 1.5rem; justify-content: space-between; }
.footer .icp { display: block; margin-top: 0.35rem; font-size: 0.8rem; color: var(--muted); }

.sticky-cta {
  position: fixed; right: 1rem; bottom: 1rem; z-index: 30;
  display: none;
}
.page-hero { padding: 3.2rem 0 1.4rem; }
.page-hero .lead { margin-bottom: 0; }
.prose { color: var(--muted); max-width: 42rem; }
.prose strong { color: var(--text); }
.prose ul { padding-left: 1.2rem; }
.prose li { margin: 0.4rem 0; }
.tag {
  display: inline-block;
  padding: 0.22rem 0.6rem;
  border-radius: 999px;
  background: rgba(255,255,255,0.04);
  color: var(--muted);
  font-size: 0.78rem;
  margin-right: 0.35rem;
}
.anchor-nav {
  display: flex;
  gap: 0.5rem 0.65rem;
  padding: 0.85rem 0;
  margin-bottom: 0.4rem;
  overflow-x: auto;
  position: sticky;
  top: 58px;
  z-index: 15;
  background: rgba(7, 16, 28, 0.88);
  backdrop-filter: blur(12px);
  scrollbar-width: none;
}
.anchor-nav::-webkit-scrollbar { display: none; }
.anchor-nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.86rem;
  padding: 0.3rem 0.75rem;
  border-radius: 999px;
  background: rgba(255,255,255,0.04);
  white-space: nowrap;
}
.anchor-nav a:hover { color: var(--text); text-decoration: none; }
.callout {
  margin: 1rem 0 0;
  padding: 1.2rem 1.3rem;
  border-radius: var(--radius);
  background: linear-gradient(90deg, rgba(45, 212, 191, 0.1), rgba(255, 255, 255, 0.03));
}
.callout p { margin: 0; color: var(--muted); }
.callout strong { color: var(--text); }
.company-line { color: var(--muted); font-size: 0.85rem; margin: 0.4rem 0 0; }
.section-block { scroll-margin-top: 7.2rem; }
.spec-split { display: grid; grid-template-columns: 1.15fr 0.85fr; gap: 1rem; }
.console {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.7rem;
}
.console-card {
  padding: 1rem 0.95rem;
  border-radius: var(--radius-sm);
  background: rgba(7, 16, 28, 0.55);
}
.console-card strong {
  display: block;
  font-size: 1.35rem;
  font-variant-numeric: tabular-nums;
  color: var(--accent);
}
.console-card span { color: var(--muted); font-size: 0.82rem; }
.timeline-brand {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
}
.checks { display: grid; gap: 0.5rem; }
.form .checks .check {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  color: var(--text);
  font-size: 0.9rem;
}

@media (max-width: 1100px) {
  .nav-links { gap: 0.4rem 0.65rem; }
  .nav-links a { font-size: 0.84rem; }
  .value-strip, .console, .flow, .timeline { grid-template-columns: repeat(3, 1fr); }
  .bento { grid-template-columns: 1fr 1fr; }
  .bento .wide { grid-column: 1 / -1; grid-row: auto; }
}
@media (max-width: 900px) {
  .hero, .contact-grid, .grid-2, .grid-3, .grid-4, .compare, .swim, .story, .sandbox, .spec-split, .timeline-brand { grid-template-columns: 1fr; }
  .value-strip, .console, .flow, .timeline, .chips, .howto { grid-template-columns: 1fr 1fr; }
  .layer { grid-template-columns: 1fr; }
  .sticky-cta { display: block; }
  .nav-toggle { display: inline-flex; }
  .nav-links { display: none; width: 100%; }
  .nav.is-open .nav-links { display: flex; }
  .table-hint { display: block; }
}
@media (max-width: 560px) {
  .value-strip, .console, .flow, .timeline, .chips, .howto, .grid-3, .matrix-group .grid-3 { grid-template-columns: 1fr; }
  h1 { font-size: 2.1rem; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn, .card { transition: none; }
  .btn:hover { transform: none; }
}