@charset "utf-8";

/* ==========================================================================
   数语科技 BigData Voice — 站点主样式表
   Palette derived from brand logo: #122B88
   ========================================================================== */

@font-face {
  font-family: "Space Grotesk";
  src: url("../fonts/SpaceGrotesk-var.woff2") format("woff2");
  font-weight: 300 700;
  font-style: normal;
  font-display: swap;
}
@font-face {
  font-family: "JetBrains Mono";
  src: url("../fonts/JetBrainsMono-var.woff2") format("woff2");
  font-weight: 300 700;
  font-style: normal;
  font-display: swap;
}

:root {
  /* surfaces */
  --bg: #040b18;
  --bg-soft: #061225;
  --bg-lift: #0a1b33;
  --panel: rgba(122, 168, 255, 0.045);
  --panel-2: rgba(122, 168, 255, 0.075);
  --line: rgba(126, 172, 255, 0.14);
  --line-soft: rgba(126, 172, 255, 0.08);
  --line-strong: rgba(126, 172, 255, 0.28);

  /* brand */
  --brand: #122b88;
  --brand-mid: #2152d8;
  --brand-lit: #4a86ff;
  --cyan: #3fe0ff;
  --cyan-dim: rgba(63, 224, 255, 0.55);

  /* text */
  --text: #e9f0fd;
  --text-2: #b9c8e2;
  --muted: #8497b6;
  --muted-2: #64769a;

  /* type */
  --font-sans: "Space Grotesk", "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei",
    "Source Han Sans SC", "Noto Sans SC", system-ui, -apple-system, sans-serif;
  --font-mono: "JetBrains Mono", "SFMono-Regular", Consolas, "Liberation Mono", monospace;

  /* layout */
  --wrap: 1240px;
  --pad: clamp(20px, 4vw, 40px);
  --radius: 3px;
  --header-h: 74px;

  --shadow-lg: 0 30px 80px -30px rgba(0, 0, 0, 0.85);
  --ease: cubic-bezier(0.22, 0.61, 0.36, 1);
}

* { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 18px);
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 15.5px;
  line-height: 1.85;
  letter-spacing: 0.01em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* ambient background field */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(900px 620px at 78% -8%, rgba(33, 82, 216, 0.22), transparent 62%),
    radial-gradient(760px 520px at 6% 8%, rgba(18, 43, 136, 0.28), transparent 60%),
    radial-gradient(900px 700px at 50% 108%, rgba(63, 224, 255, 0.07), transparent 62%);
}

body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: 0.5;
  background-image: linear-gradient(rgba(126, 172, 255, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(126, 172, 255, 0.045) 1px, transparent 1px);
  background-size: 88px 88px;
  mask-image: radial-gradient(circle at 50% 30%, #000 0%, transparent 78%);
  -webkit-mask-image: radial-gradient(circle at 50% 30%, #000 0%, transparent 78%);
}

main, header, footer { position: relative; z-index: 2; }

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

h1, h2, h3, h4 {
  margin: 0;
  font-weight: 600;
  line-height: 1.22;
  letter-spacing: -0.015em;
}

p { margin: 0; }

::selection { background: rgba(63, 224, 255, 0.28); color: #fff; }

/* ------------------------------------------------------------------ layout */
.wrap {
  width: 100%;
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: var(--pad);
}

.section { padding: clamp(64px, 8vw, 118px) 0; position: relative; }
.section--tight { padding: clamp(48px, 5vw, 74px) 0; }
.section--hairline { border-top: 1px solid var(--line-soft); }

.grid { display: grid; gap: 18px; }
.g2 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
.g3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.g4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
.g-28 { gap: 28px; }

/* --------------------------------------------------------------- typography */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.24em;
  text-transform: uppercase;
  color: var(--cyan);
  margin-bottom: 20px;
}
.eyebrow::before {
  content: "";
  width: 22px;
  height: 1px;
  background: var(--cyan);
  opacity: 0.7;
}

.display {
  font-size: clamp(34px, 5vw, 64px);
  line-height: 1.1;
  letter-spacing: -0.03em;
  font-weight: 600;
}

.h2 {
  font-size: clamp(26px, 3.1vw, 40px);
  line-height: 1.24;
  letter-spacing: -0.025em;
}

.h3 { font-size: clamp(19px, 1.6vw, 22px); }

.lead {
  font-size: clamp(15px, 1.15vw, 17px);
  color: var(--text-2);
  line-height: 1.9;
  max-width: 66ch;
}

.muted { color: var(--muted); }
.cyan { color: var(--cyan); }
.mono {
  font-family: var(--font-mono);
  letter-spacing: 0.08em;
  font-size: 0.86em;
}
.num { font-family: var(--font-mono); font-variant-numeric: tabular-nums; }

.sec-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 40px; flex-wrap: wrap; margin-bottom: clamp(34px, 4vw, 56px); }
.sec-head .lead { max-width: 46ch; }

/* -------------------------------------------------------------------- links */
.tlink {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  color: var(--cyan);
  font-weight: 500;
  letter-spacing: 0.02em;
  transition: gap 0.25s var(--ease), color 0.25s;
}
.tlink::after { content: "↗"; font-size: 0.95em; transition: transform 0.25s var(--ease); }
.tlink:hover { gap: 12px; color: #fff; }
.tlink:hover::after { transform: translate(2px, -2px); }

/* ------------------------------------------------------------------ buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  height: 46px;
  padding: 0 24px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.03em;
  border: 1px solid transparent;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  transition: transform 0.3s var(--ease), background 0.3s, border-color 0.3s, box-shadow 0.3s, color 0.3s;
  white-space: nowrap;
}
.btn--primary {
  background: linear-gradient(120deg, var(--brand-mid), #1b3fb0);
  border-color: rgba(90, 150, 255, 0.5);
  color: #fff;
  box-shadow: 0 12px 34px -14px rgba(33, 82, 216, 0.9), inset 0 1px 0 rgba(255, 255, 255, 0.16);
}
.btn--primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 20px 44px -16px rgba(45, 110, 255, 0.95), inset 0 1px 0 rgba(255, 255, 255, 0.24);
}
.btn--ghost {
  background: rgba(126, 172, 255, 0.05);
  border-color: var(--line-strong);
  color: var(--text);
}
.btn--ghost:hover { background: rgba(126, 172, 255, 0.12); border-color: rgba(126, 172, 255, 0.5); transform: translateY(-2px); }
.btn--sm { height: 38px; padding: 0 16px; font-size: 13px; }
.btn svg { width: 15px; height: 15px; flex: none; }

/* ------------------------------------------------------------------- header */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 90;
  height: var(--header-h);
  display: flex;
  align-items: center;
  transition: background 0.35s, border-color 0.35s, backdrop-filter 0.35s;
  border-bottom: 1px solid transparent;
}
.site-header.is-stuck {
  background: rgba(4, 11, 24, 0.82);
  backdrop-filter: blur(18px) saturate(150%);
  -webkit-backdrop-filter: blur(18px) saturate(150%);
  border-bottom-color: var(--line-soft);
}
.header-inner { display: flex; align-items: center; gap: 30px; width: 100%; }

.brand { display: flex; align-items: center; gap: 13px; flex: none; }
.brand-mark {
  width: 40px; height: 40px;
  border-radius: 2px;
  display: grid; place-items: center;
  background: linear-gradient(150deg, #1b3ea8, var(--brand) 55%, #0b1a52);
  border: 1px solid rgba(120, 165, 255, 0.35);
  box-shadow: 0 0 0 1px rgba(4, 11, 24, 0.6), 0 10px 26px -12px rgba(30, 80, 220, 0.9);
  font-family: var(--font-mono);
  font-weight: 700;
  font-size: 13px;
  letter-spacing: -0.04em;
  color: #fff;
}
.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-cn { font-size: 16.5px; font-weight: 600; letter-spacing: 0.14em; }
.brand-en {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.3em;
  color: var(--muted);
  margin-top: 3px;
  text-transform: uppercase;
}

.nav { display: flex; align-items: center; gap: 4px; margin-left: auto; }
.nav a {
  position: relative;
  padding: 9px 15px;
  font-size: 14px;
  color: var(--text-2);
  border-radius: 2px;
  transition: color 0.25s, background 0.25s;
}
.nav a::after {
  content: "";
  position: absolute;
  left: 15px; right: 15px; bottom: 4px;
  height: 1px;
  background: var(--cyan);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s var(--ease);
}
.nav a:hover { color: #fff; }
.nav a:hover::after, .nav a[aria-current="page"]::after { transform: scaleX(1); }
.nav a[aria-current="page"] { color: #fff; }

.header-cta { display: flex; align-items: center; gap: 12px; margin-left: 8px; }
.header-tel {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--muted);
  letter-spacing: 0.06em;
  transition: color 0.25s;
}
.header-tel:hover { color: var(--cyan); }

.burger {
  display: none;
  width: 42px; height: 42px;
  background: rgba(126, 172, 255, 0.07);
  border: 1px solid var(--line);
  border-radius: 2px;
  align-items: center; justify-content: center;
  flex-direction: column; gap: 5px;
  cursor: pointer;
  margin-left: auto;
}
.burger span { display: block; width: 18px; height: 1.5px; background: var(--text); transition: transform 0.3s, opacity 0.3s; }
.burger[aria-expanded="true"] span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.burger[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.burger[aria-expanded="true"] span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

.mobile-nav {
  position: fixed;
  inset: var(--header-h) 0 auto 0;
  z-index: 89;
  background: rgba(5, 13, 28, 0.97);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--line);
  padding: 10px var(--pad) 26px;
  display: none;
  flex-direction: column;
  max-height: calc(100vh - var(--header-h));
  overflow-y: auto;
}
.mobile-nav.is-open { display: flex; }
.mobile-nav a {
  padding: 15px 4px;
  font-size: 16px;
  color: var(--text-2);
  border-bottom: 1px solid var(--line-soft);
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.mobile-nav a span { font-family: var(--font-mono); font-size: 10px; color: var(--muted-2); letter-spacing: 0.2em; }
.mobile-nav .btn { margin-top: 20px; width: 100%; }

/* --------------------------------------------------------------------- hero */
.hero {
  position: relative;
  min-height: min(94vh, 880px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding-top: calc(var(--header-h) + 40px);
  padding-bottom: 46px;
  overflow: hidden;
  isolation: isolate;
}
.hero-bg {
  position: absolute;
  inset: 0;
  z-index: -2;
  overflow: hidden;
}
.hero-bg img {
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: 60% 45%;
  filter: grayscale(1) contrast(1.06) brightness(0.95);
  opacity: 0.78;
}
.hero-bg::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, rgba(4, 11, 24, 0.95) 0%, rgba(4, 11, 24, 0.78) 34%, rgba(4, 11, 24, 0.34) 66%, rgba(4, 11, 24, 0.7) 100%),
    linear-gradient(0deg, var(--bg) 1%, rgba(4, 11, 24, 0.12) 40%, rgba(4, 11, 24, 0.48) 100%),
    radial-gradient(circle at 68% 44%, rgba(33, 82, 216, 0.24), transparent 62%);
}
.hero-canvas { position: absolute; inset: 0; z-index: -1; opacity: 0.55; pointer-events: none; }

.hero-inner { display: grid; grid-template-columns: minmax(0, 1fr) 340px; gap: 60px; align-items: end; }
.hero-copy { max-width: 760px; }

.hero h1 {
  font-size: clamp(36px, 5.4vw, 70px);
  line-height: 1.08;
  letter-spacing: -0.035em;
  font-weight: 600;
}
.hero h1 .grad {
  background: linear-gradient(96deg, #ffffff 12%, #9dc4ff 52%, #3fe0ff 96%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.hero-sub {
  margin-top: 26px;
  font-size: clamp(15px, 1.25vw, 18px);
  color: var(--text-2);
  max-width: 60ch;
  line-height: 1.95;
}
.hero-actions { display: flex; gap: 14px; margin-top: 38px; flex-wrap: wrap; }

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 7px 14px 7px 10px;
  border: 1px solid var(--line);
  border-radius: 100px;
  background: rgba(6, 18, 37, 0.7);
  backdrop-filter: blur(8px);
  font-size: 12.5px;
  color: var(--text-2);
  margin-bottom: 28px;
  letter-spacing: 0.04em;
}
.hero-badge i {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(63, 224, 255, 0.15);
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 3px rgba(63, 224, 255, 0.18); }
  50% { box-shadow: 0 0 0 7px rgba(63, 224, 255, 0.03); }
}

/* HUD rail in hero */
.hud {
  border: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(10, 27, 51, 0.78), rgba(6, 18, 37, 0.5));
  backdrop-filter: blur(10px);
  padding: 22px;
  border-radius: var(--radius);
  position: relative;
}
.hud::before, .hud::after {
  content: "";
  position: absolute;
  width: 9px; height: 9px;
  border: 1px solid var(--cyan);
  opacity: 0.65;
}
.hud::before { top: -1px; left: -1px; border-right: 0; border-bottom: 0; }
.hud::after { bottom: -1px; right: -1px; border-left: 0; border-top: 0; }
.hud-title {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.24em;
  color: var(--muted);
  text-transform: uppercase;
  display: flex; justify-content: space-between; align-items: center;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--line-soft);
  margin-bottom: 16px;
}
.hud-row {
  display: flex; justify-content: space-between; align-items: baseline;
  padding: 9px 0;
  border-bottom: 1px dashed rgba(126, 172, 255, 0.1);
  font-size: 13px;
}
.hud-row:last-child { border-bottom: 0; }
.hud-row b {
  font-family: var(--font-mono);
  font-size: 19px;
  font-weight: 500;
  color: #fff;
  letter-spacing: -0.02em;
}
.hud-row b em { font-style: normal; font-size: 11px; color: var(--muted); margin-left: 4px; }

/* hero stat strip */
.hero-stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  margin-top: clamp(46px, 6vw, 72px);
  border-top: 1px solid var(--line-soft);
  background: var(--line-soft);
}
.hero-stats .stat {
  background: transparent;
  padding: 26px 0 0;
  padding-right: 20px;
}
.hero-stats .stat + .stat { padding-left: 26px; }
.stat-val {
  font-family: var(--font-mono);
  font-size: clamp(26px, 3vw, 38px);
  font-weight: 500;
  letter-spacing: -0.03em;
  line-height: 1;
  color: #fff;
}
.stat-val em { font-style: normal; font-size: 0.46em; color: var(--cyan); margin-left: 5px; letter-spacing: 0.04em; }
.stat-cap { font-size: 12.5px; color: var(--muted); margin-top: 11px; letter-spacing: 0.05em; }

/* ------------------------------------------------------------------- panels */
.card {
  position: relative;
  background: linear-gradient(170deg, var(--panel-2), var(--panel) 60%, rgba(6, 18, 37, 0.35));
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 26px;
  transition: border-color 0.35s, transform 0.4s var(--ease), background 0.35s, box-shadow 0.4s;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}
.card::after {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--cyan), transparent);
  opacity: 0;
  transition: opacity 0.4s;
}
.card:hover {
  border-color: var(--line-strong);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.card:hover::after { opacity: 0.8; }

.card-num {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--muted-2);
  letter-spacing: 0.2em;
  margin-bottom: 16px;
  display: flex; align-items: center; gap: 10px;
}
.card-num::after { content: ""; flex: 1; height: 1px; background: var(--line-soft); }
.card h3 { font-size: 19px; margin-bottom: 12px; letter-spacing: -0.01em; }
.card p { font-size: 14px; color: var(--text-2); line-height: 1.85; }
.card .tlink { margin-top: auto; padding-top: 20px; }

.card--flat { background: rgba(6, 18, 37, 0.5); }
.card .btn { align-self: flex-start; }

/* icon frame */
.ico {
  width: 44px; height: 44px;
  display: grid; place-items: center;
  border: 1px solid var(--line);
  border-radius: 2px;
  background: rgba(33, 82, 216, 0.12);
  color: var(--cyan);
  margin-bottom: 20px;
  position: relative;
  flex: none;
}
.ico svg { width: 21px; height: 21px; stroke: currentColor; fill: none; stroke-width: 1.4; }
.card:hover .ico { border-color: var(--line-strong); background: rgba(33, 82, 216, 0.22); }

/* --------------------------------------------------------------- media/photo */
.media {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--bg-soft);
  isolation: isolate;
}
.media img {
  width: 100%; height: 100%;
  object-fit: cover;
  filter: grayscale(1) contrast(1.1) brightness(0.72);
  transition: transform 0.9s var(--ease), filter 0.6s;
}
/* blue duotone wash keeps photography on-brand */
.media::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 1;
  background: linear-gradient(150deg, rgba(18, 43, 136, 0.85), rgba(33, 82, 216, 0.42) 48%, rgba(63, 224, 255, 0.2));
  mix-blend-mode: color;
  pointer-events: none;
  transition: opacity 0.6s;
}
.media::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: 2;
  pointer-events: none;
  background:
    linear-gradient(0deg, rgba(4, 11, 24, 0.88) 2%, rgba(4, 11, 24, 0.1) 55%, rgba(4, 11, 24, 0.35) 100%),
    repeating-linear-gradient(0deg, rgba(126, 172, 255, 0.05) 0 1px, transparent 1px 3px);
}
.media:hover img { transform: scale(1.04); filter: grayscale(1) contrast(1.12) brightness(0.82); }
.media--plain::before { opacity: 0.55; }
.media--plain::after { background: linear-gradient(0deg, rgba(4, 11, 24, 0.9), rgba(4, 11, 24, 0.05) 60%); }

/* ratio helpers */
.r169 { aspect-ratio: 16 / 9; }
.r43 { aspect-ratio: 4 / 3; }
.r11 { aspect-ratio: 1 / 1; }
.r219 { aspect-ratio: 21 / 9; }

.media-cap {
  position: absolute;
  z-index: 3;
  left: 22px; right: 22px; bottom: 20px;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 16px;
}
.media-cap h3 { font-size: 20px; margin-bottom: 6px; }
.media-cap p { font-size: 13px; color: var(--text-2); max-width: 46ch; }
.media-tag {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
  border: 1px solid rgba(63, 224, 255, 0.35);
  background: rgba(4, 11, 24, 0.6);
  padding: 4px 9px;
  white-space: nowrap;
  flex: none;
}

/* ------------------------------------------------------------------ showcase */
.showcase {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 20px;
  align-items: stretch;
}
.spec-list { list-style: none; margin: 0; padding: 0; }
.spec-list li {
  display: flex;
  gap: 14px;
  padding: 15px 0;
  border-bottom: 1px solid var(--line-soft);
  font-size: 14px;
  color: var(--text-2);
}
.spec-list li:last-child { border-bottom: 0; }
.spec-list b {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--cyan);
  letter-spacing: 0.12em;
  flex: none;
  padding-top: 4px;
  min-width: 44px;
}

/* ------------------------------------------------------------------ marquee */
.marquee {
  overflow: hidden;
  position: relative;
  padding: 22px 0;
  border-block: 1px solid var(--line-soft);
  mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 8%, #000 92%, transparent);
}
.marquee-track { display: flex; gap: 0; width: max-content; animation: slide 38s linear infinite; }
.marquee:hover .marquee-track { animation-play-state: paused; }
@keyframes slide { to { transform: translateX(-50%); } }
.marquee-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 30px;
  font-size: 15px;
  color: var(--text-2);
  white-space: nowrap;
  border-right: 1px solid var(--line-soft);
  letter-spacing: 0.04em;
}
.marquee-item i {
  width: 5px; height: 5px;
  background: var(--cyan);
  opacity: 0.6;
  transform: rotate(45deg);
  flex: none;
}

/* ------------------------------------------------------------------ modules */
.mod-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(190px, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}
.mod {
  background: var(--bg);
  padding: 22px 20px;
  transition: background 0.3s;
  position: relative;
}
.mod:hover { background: rgba(33, 82, 216, 0.09); }
.mod-idx {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--muted-2);
  letter-spacing: 0.16em;
}
.mod h4 { font-size: 15px; margin: 8px 0 7px; font-weight: 500; }
.mod p { font-size: 12.5px; color: var(--muted); line-height: 1.7; }
.mod-n {
  position: absolute;
  top: 18px; right: 18px;
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--cyan);
  opacity: 0.75;
}

/* -------------------------------------------------------------------- stats */
.stat-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}
.stat-cell {
  background: linear-gradient(180deg, rgba(10, 27, 51, 0.7), rgba(4, 11, 24, 0.2));
  padding: 30px 26px;
}
.stat-cell .stat-val { color: #fff; }
.stat-cell .stat-cap { margin-top: 12px; }

/* ------------------------------------------------------------------- cta bar */
.cta-bar {
  position: relative;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  padding: clamp(34px, 5vw, 62px);
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 34px;
  align-items: center;
  background:
    radial-gradient(700px 300px at 88% 0%, rgba(63, 224, 255, 0.16), transparent 65%),
    linear-gradient(120deg, rgba(18, 43, 136, 0.55), rgba(6, 18, 37, 0.7) 55%, rgba(10, 27, 51, 0.5));
}
.cta-bar::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(90deg, rgba(126, 172, 255, 0.07) 1px, transparent 1px);
  background-size: 46px 46px;
  mask-image: linear-gradient(90deg, transparent, #000);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000);
  pointer-events: none;
}
.cta-bar h2 { font-size: clamp(24px, 2.9vw, 36px); }
.cta-bar p { margin-top: 12px; color: var(--text-2); font-size: 14.5px; }
.cta-actions { display: flex; gap: 12px; flex-wrap: wrap; }

/* ------------------------------------------------------------------- footer */
.site-footer {
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(6, 18, 37, 0.4), rgba(3, 8, 18, 0.95));
  padding: clamp(50px, 6vw, 76px) 0 30px;
  margin-top: 10px;
}
.footer-top {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 44px;
  border-bottom: 1px solid var(--line-soft);
}
.footer-brand p { font-size: 13.5px; color: var(--muted); margin-top: 20px; max-width: 34ch; line-height: 1.85; }
.footer-col h4 {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--muted-2);
  margin-bottom: 18px;
  font-weight: 500;
}
.footer-col a, .footer-col li {
  display: block;
  font-size: 13.5px;
  color: var(--text-2);
  padding: 6px 0;
  transition: color 0.22s, padding-left 0.22s;
  list-style: none;
}
.footer-col a:hover { color: var(--cyan); padding-left: 4px; }
.footer-col ul { margin: 0; padding: 0; }
.footer-bottom {
  display: flex;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
  padding-top: 26px;
  font-size: 12.5px;
  color: var(--muted-2);
}
.footer-bottom .mono { letter-spacing: 0.1em; }
.footer-bottom .mono a { color: inherit; border-bottom: 1px solid transparent; transition: color 0.25s, border-color 0.25s; }
.footer-bottom .mono a:hover { color: var(--cyan); border-bottom-color: currentColor; }
.footer-social { display: flex; gap: 10px; }
.footer-social a {
  width: 34px; height: 34px;
  border: 1px solid var(--line);
  display: grid; place-items: center;
  border-radius: 2px;
  color: var(--muted);
  transition: color 0.25s, border-color 0.25s, background 0.25s;
}
.footer-social a:hover { color: var(--cyan); border-color: var(--line-strong); background: rgba(33, 82, 216, 0.15); }
.footer-social svg { width: 15px; height: 15px; stroke: currentColor; fill: none; stroke-width: 1.5; }

/* ----------------------------------------------------------------- page hero */
.page-hero {
  position: relative;
  padding-top: calc(var(--header-h) + clamp(56px, 8vw, 96px));
  padding-bottom: clamp(44px, 6vw, 72px);
  border-bottom: 1px solid var(--line-soft);
  overflow: hidden;
}
.page-hero::before {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(680px 400px at 82% 0%, rgba(33, 82, 216, 0.3), transparent 66%),
    radial-gradient(500px 320px at 10% 10%, rgba(63, 224, 255, 0.09), transparent 70%);
}
.page-hero h1 {
  font-size: clamp(30px, 4.2vw, 52px);
  letter-spacing: -0.03em;
  margin-bottom: 20px;
  max-width: 24ch;
}
.page-hero .lead { max-width: 58ch; }
.page-hero + .section { padding-top: clamp(30px, 3.2vw, 48px); }
.crumb {
  display: flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted-2);
  margin-bottom: 24px;
}
.crumb a:hover { color: var(--cyan); }
.crumb span { opacity: 0.45; }

/* ------------------------------------------------------------- solutions row */
.sol-card {
  display: grid;
  grid-template-columns: 88px 1fr;
  gap: 26px;
  align-items: start;
  padding: 30px;
}
.sol-card .ico { margin-bottom: 0; width: 58px; height: 58px; }
.sol-card .ico svg { width: 26px; height: 26px; }
.sol-card h3 { font-size: 21px; margin-bottom: 10px; }
.sol-tags { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 16px; }
.tag {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  color: var(--text-2);
  border: 1px solid var(--line);
  padding: 4px 9px;
  border-radius: 2px;
  background: rgba(126, 172, 255, 0.04);
}

/* --------------------------------------------------------------- case cards */
.case-card { display: flex; flex-direction: column; }
.case-card .media { border-radius: 2px 2px 0 0; border-bottom: 0; }
.case-body { padding: 24px 24px 26px; display: flex; flex-direction: column; flex: 1; }
.case-meta {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.18em;
  color: var(--cyan);
  text-transform: uppercase;
  margin-bottom: 12px;
}
.case-body h3 { font-size: 18px; margin-bottom: 10px; }
.case-body p { font-size: 13.5px; color: var(--text-2); }
.case-facts { display: flex; gap: 22px; margin-top: 18px; padding-top: 16px; border-top: 1px solid var(--line-soft); }
.case-facts div { }
.case-facts b { display: block; font-family: var(--font-mono); font-size: 15px; color: #fff; font-weight: 500; }
.case-facts span { font-size: 11px; color: var(--muted-2); letter-spacing: 0.06em; }

/* -------------------------------------------------------------------- table */
.tbl { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.tbl th {
  text-align: left;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted-2);
  font-weight: 500;
  padding: 12px 16px;
  border-bottom: 1px solid var(--line);
  background: rgba(10, 27, 51, 0.5);
}
.tbl td { padding: 14px 16px; border-bottom: 1px solid var(--line-soft); color: var(--text-2); vertical-align: top; }
.tbl td b { color: #fff; font-weight: 500; }
.tbl tr:hover td { background: rgba(33, 82, 216, 0.05); }
.tbl .num { color: var(--cyan); }

/* ----------------------------------------------------------------- timeline */
.timeline { position: relative; padding-left: 28px; }
.timeline::before {
  content: "";
  position: absolute;
  left: 5px; top: 6px; bottom: 10px;
  width: 1px;
  background: linear-gradient(180deg, var(--cyan), rgba(126, 172, 255, 0.15));
}
.tl-item { position: relative; padding: 0 0 34px 0; }
.tl-item::before {
  content: "";
  position: absolute;
  left: -27px; top: 8px;
  width: 9px; height: 9px;
  border-radius: 50%;
  background: var(--bg);
  border: 1px solid var(--cyan);
  box-shadow: 0 0 0 4px rgba(63, 224, 255, 0.12);
}
.tl-year {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--cyan);
  letter-spacing: 0.14em;
  margin-bottom: 6px;
}
.tl-item h4 { font-size: 16px; margin-bottom: 6px; }
.tl-item p { font-size: 13.5px; color: var(--muted); max-width: 60ch; }

/* ------------------------------------------------------------------ accordion */
.acc { border-top: 1px solid var(--line); }
.acc-item { border-bottom: 1px solid var(--line); }
.acc-btn {
  width: 100%;
  background: none;
  border: 0;
  text-align: left;
  padding: 22px 0;
  display: flex;
  align-items: center;
  gap: 18px;
  cursor: pointer;
  font-size: 16px;
  font-weight: 500;
  color: var(--text);
  transition: color 0.25s;
}
.acc-btn:hover { color: var(--cyan); }
.acc-idx { font-family: var(--font-mono); font-size: 11px; color: var(--muted-2); letter-spacing: 0.14em; flex: none; }
.acc-btn .pm { margin-left: auto; flex: none; width: 16px; height: 16px; position: relative; }
.acc-btn .pm::before, .acc-btn .pm::after {
  content: ""; position: absolute; background: var(--cyan);
  transition: transform 0.3s var(--ease), opacity 0.3s;
}
.acc-btn .pm::before { left: 0; right: 0; top: 7.5px; height: 1px; }
.acc-btn .pm::after { top: 0; bottom: 0; left: 7.5px; width: 1px; }
.acc-item.is-open .acc-btn .pm::after { transform: scaleY(0); opacity: 0; }
.acc-panel { max-height: 0; overflow: hidden; transition: max-height 0.45s var(--ease); }
.acc-panel-inner { padding: 0 0 26px 41px; color: var(--text-2); font-size: 14px; }
.acc-panel-inner ul { margin: 10px 0 0; padding-left: 18px; }
.acc-panel-inner li { margin-bottom: 6px; }

/* --------------------------------------------------------------- tabs / pills */
.tabs { display: flex; gap: 8px; flex-wrap: wrap; margin-bottom: 34px; }
.tab {
  padding: 9px 18px;
  font-size: 13.5px;
  border: 1px solid var(--line);
  background: rgba(126, 172, 255, 0.04);
  border-radius: 100px;
  cursor: pointer;
  color: var(--text-2);
  transition: all 0.25s;
}
.tab:hover { border-color: var(--line-strong); color: #fff; }
.tab[aria-selected="true"] {
  background: linear-gradient(120deg, var(--brand-mid), #1b3fb0);
  border-color: rgba(90, 150, 255, 0.6);
  color: #fff;
  box-shadow: 0 10px 26px -14px rgba(33, 82, 216, 0.9);
}
.tab-panel[hidden] { display: none; }

/* ----------------------------------------------------------------- form bits */
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 16px; }
.field { display: flex; flex-direction: column; gap: 8px; }
.field.full { grid-column: 1 / -1; }
.field label {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted);
}
.field input, .field select, .field textarea {
  background: rgba(6, 18, 37, 0.7);
  border: 1px solid var(--line);
  border-radius: 2px;
  padding: 13px 14px;
  color: var(--text);
  font: inherit;
  font-size: 14px;
  outline: none;
  transition: border-color 0.25s, background 0.25s;
  width: 100%;
}
.field textarea { resize: vertical; min-height: 110px; }
.field input:focus, .field select:focus, .field textarea:focus {
  border-color: rgba(63, 224, 255, 0.55);
  background: rgba(10, 27, 51, 0.85);
}
.field input::placeholder, .field textarea::placeholder { color: var(--muted-2); }
.form-note { font-size: 12px; color: var(--muted-2); margin-top: 16px; }

/* --------------------------------------------------------------- info blocks */
.info-row {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: 20px;
  padding: 20px 0;
  border-bottom: 1px solid var(--line-soft);
  font-size: 14px;
}
.info-row dt {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--muted-2);
  padding-top: 4px;
}
.info-row dd { margin: 0; color: var(--text); }
.info-row dd small { display: block; color: var(--muted); font-size: 12.5px; margin-top: 4px; }

/* --------------------------------------------------------------- blueprint deco */
.bp-strip {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 1px;
  background: var(--line-soft);
  border: 1px solid var(--line-soft);
}
.bp-cell {
  background: rgba(4, 11, 24, 0.85);
  padding: 20px 18px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  color: var(--muted);
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 10px;
}
.bp-cell b { color: var(--cyan); font-weight: 500; }
.bp-cell svg { width: 16px; height: 16px; stroke: var(--cyan); fill: none; stroke-width: 1.3; flex: none; opacity: 0.8; }

/* architecture diagram (pure CSS) */
.arch { display: grid; gap: 12px; }
.arch-layer {
  border: 1px solid var(--line);
  border-radius: 2px;
  padding: 16px 18px;
  background: linear-gradient(100deg, rgba(10, 27, 51, 0.75), rgba(6, 18, 37, 0.35));
  display: grid;
  grid-template-columns: 116px 1fr;
  gap: 18px;
  align-items: center;
  transition: border-color 0.3s, transform 0.3s;
}
.arch-layer:hover { border-color: var(--line-strong); transform: translateX(3px); }
.arch-layer > span {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--cyan);
}
.arch-chips { display: flex; flex-wrap: wrap; gap: 7px; }
.chip {
  font-size: 12.5px;
  padding: 5px 11px;
  border: 1px solid var(--line);
  background: rgba(126, 172, 255, 0.05);
  border-radius: 2px;
  color: var(--text-2);
}
.arch-layer--core { background: linear-gradient(100deg, rgba(33, 82, 216, 0.28), rgba(18, 43, 136, 0.14)); border-color: rgba(90, 150, 255, 0.4); }

/* live metrics panel */
.metric-list { display: grid; gap: 14px; }
.metric {
  border: 1px solid var(--line-soft);
  padding: 14px 16px;
  background: rgba(6, 18, 37, 0.5);
}
.metric-h { display: flex; justify-content: space-between; font-size: 12.5px; color: var(--text-2); margin-bottom: 9px; }
.metric-h b { font-family: var(--font-mono); color: #fff; font-weight: 500; }
.bar { height: 3px; background: rgba(126, 172, 255, 0.12); position: relative; overflow: hidden; }
.bar i { position: absolute; inset: 0 auto 0 0; background: linear-gradient(90deg, var(--brand-mid), var(--cyan)); }
.bar.is-warn i { background: linear-gradient(90deg, #ffb020, #ff6a3d); }

/* ---------------------------------------------------------------- animations */
[data-reveal] {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.75s var(--ease), transform 0.75s var(--ease);
  will-change: opacity, transform;
}
[data-reveal].is-in { opacity: 1; transform: none; }

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.001ms !important; transition-duration: 0.001ms !important; }
  html { scroll-behavior: auto; }
  [data-reveal] { opacity: 1; transform: none; }
}

/* --------------------------------------------------------------- responsive */
@media (max-width: 1080px) {
  .hero-inner { grid-template-columns: 1fr; gap: 38px; }
  .hud { max-width: 420px; }
  .showcase { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr 1fr; gap: 34px; }
  .g4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .nav { display: none; }
  .burger { display: flex; }
  .header-cta .btn { display: none; }
  .header-tel { display: none; }
}

@media (max-width: 860px) {
  .stat-grid, .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .hero-stats .stat { padding-right: 0; }
  .hero-stats .stat + .stat { padding-left: 0; }
  .hero-stats { gap: 0; }
  .g3, .g2 { grid-template-columns: 1fr; }
  .cta-bar { grid-template-columns: 1fr; }
  .sol-card { grid-template-columns: 1fr; gap: 18px; }
  .form-grid { grid-template-columns: 1fr; }
  .hero { min-height: auto; padding-top: calc(var(--header-h) + 64px); }
  .info-row { grid-template-columns: 1fr; gap: 6px; }
  .arch-layer { grid-template-columns: 1fr; gap: 10px; }
}

@media (max-width: 860px) {
  .hero-bg img { opacity: 0.5; }
  .hero-bg::after {
    background-image:
      linear-gradient(90deg, rgba(4, 11, 24, 0.96) 0%, rgba(4, 11, 24, 0.9) 100%),
      linear-gradient(to bottom, rgba(4, 11, 24, 0.2), rgba(4, 11, 24, 0.62));
  }
}

@media (max-width: 560px) {
  .stat-grid, .hero-stats { grid-template-columns: 1fr; }
  .footer-top { grid-template-columns: 1fr; }
  .g4 { grid-template-columns: 1fr; }
  .media-cap { left: 16px; right: 16px; bottom: 16px; flex-direction: column; align-items: flex-start; }
  .acc-panel-inner { padding-left: 0; }
  .footer-bottom { flex-direction: column; }
}

/* ==========================================================================
   站点补充模块（页面构建时新增）
   ========================================================================== */

/* 页头品牌（使用矢量 logo 图，非文字拼装） */
.brand-logo { height: 30px; width: auto; display: block; }
.site-header.is-stuck .brand-logo { height: 26px; }
.brand-cn { font-size: 17px; font-weight: 600; letter-spacing: 0.18em; padding-left: 3px; white-space: nowrap; }
.brand-logo { transition: height 0.35s var(--ease); }

/* 三列模块网格（9 格整除） */
.mod-grid--3 { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 860px) { .mod-grid--3 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 560px) { .mod-grid--3 { grid-template-columns: 1fr; } }

/* 双行能力条 */
.bp-cell--stack { flex-direction: column; align-items: flex-start; gap: 7px; }
.bp-cell--stack span { color: var(--muted-2); letter-spacing: 0.06em; }
a.bp-cell { transition: background 0.25s, color 0.25s; }
a.bp-cell:hover { background: rgba(33, 82, 216, 0.12); }

/* 行内代码 */
.card code, .lead code, .acc-panel-inner code {
  font-family: var(--font-mono);
  font-size: 0.86em;
  color: var(--cyan);
  background: rgba(63, 224, 255, 0.08);
  border: 1px solid rgba(63, 224, 255, 0.18);
  padding: 1px 5px;
  border-radius: 2px;
}

/* HUD 实时状态点 */
.hud-live { display: inline-flex; align-items: center; gap: 6px; color: var(--cyan); }
.hud-live i {
  width: 5px; height: 5px; border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 3px rgba(63, 224, 255, 0.18);
  animation: pulse 2.4s ease-in-out infinite;
}

/* 通栏照片带 */
.band {
  position: relative;
  overflow: hidden;
  border-block: 1px solid var(--line-soft);
  isolation: isolate;
}
.band img {
  width: 100%;
  height: clamp(240px, 34vw, 440px);
  object-fit: cover;
  filter: grayscale(1) contrast(1.06) brightness(0.5);
}
.band::before {
  content: "";
  position: absolute; inset: 0; z-index: 1;
  background: linear-gradient(150deg, rgba(18, 43, 136, 0.8), rgba(33, 82, 216, 0.32) 50%, rgba(63, 224, 255, 0.16));
  mix-blend-mode: color;
}
.band::after {
  content: "";
  position: absolute; inset: 0; z-index: 2;
  background:
    linear-gradient(0deg, rgba(4, 11, 24, 0.95) 0%, rgba(4, 11, 24, 0.25) 46%, rgba(4, 11, 24, 0.72) 100%),
    repeating-linear-gradient(0deg, rgba(126, 172, 255, 0.05) 0 1px, transparent 1px 3px);
}
.band-cap {
  position: absolute; z-index: 3; inset: auto 0 0 0;
  padding: 0 0 clamp(24px, 3vw, 38px);
}
.band-cap .wrap { display: flex; justify-content: space-between; align-items: flex-end; gap: 30px; flex-wrap: wrap; }
.band-cap h2 { font-size: clamp(20px, 2.4vw, 30px); max-width: 30ch; }
.band-cap p { margin-top: 10px; font-size: 13.5px; color: var(--text-2); max-width: 50ch; }

/* 图文两栏 */
.split {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 0.92fr);
  gap: clamp(28px, 4.5vw, 64px);
  align-items: start;
}
.split--rev > :first-child { order: 2; }
.split__aside { position: sticky; top: calc(var(--header-h) + 26px); }

/* 强调数字 */
.big-num {
  font-family: var(--font-mono);
  font-size: clamp(30px, 4.2vw, 48px);
  font-weight: 500;
  letter-spacing: -0.04em;
  line-height: 1;
  color: #fff;
}
.big-num em { font-style: normal; font-size: 0.36em; color: var(--cyan); margin-left: 6px; letter-spacing: 0.06em; }
.big-cap { font-size: 12.5px; color: var(--muted); margin-top: 10px; letter-spacing: 0.04em; }

/* 勾选清单 */
.check-list { list-style: none; margin: 0; padding: 0; display: grid; gap: 12px; }
.check-list li {
  position: relative;
  padding-left: 26px;
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.8;
}
.check-list li::before {
  content: "";
  position: absolute;
  left: 0; top: 0.6em;
  width: 9px; height: 9px;
  border: 1px solid var(--cyan);
  border-radius: 50%;
  box-shadow: inset 0 0 0 2px var(--bg);
  background: var(--cyan);
  opacity: 0.75;
}

/* 引文 */
.quote {
  border-left: 2px solid var(--cyan);
  padding-left: clamp(18px, 2.4vw, 28px);
  font-size: clamp(17px, 1.7vw, 21px);
  line-height: 1.75;
  color: #fff;
  letter-spacing: -0.01em;
}
.quote small {
  display: block;
  margin-top: 16px;
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.18em;
  color: var(--muted);
  text-transform: uppercase;
}

/* 照片网格 */
.pgrid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 14px; }
.pgrid .media:nth-child(1) { grid-column: span 2; }

/* 小节内的说明文字 */
.note { font-size: 12.5px; color: var(--muted-2); line-height: 1.9; }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-36 { margin-top: 36px; }
.mb-24 { margin-bottom: 24px; }

/* 子导航（产品锚点） */
.subnav {
  display: flex; gap: 8px; flex-wrap: wrap;
  padding: 14px 0;
  border-block: 1px solid var(--line-soft);
  margin-bottom: clamp(34px, 4vw, 54px);
}
.subnav a {
  font-size: 13px;
  padding: 6px 14px;
  border: 1px solid transparent;
  border-radius: 100px;
  color: var(--text-2);
  transition: color 0.25s, border-color 0.25s, background 0.25s;
}
.subnav a:hover { color: #fff; border-color: var(--line-strong); background: rgba(33, 82, 216, 0.12); }

/* 表单反馈 */
.form-msg { margin-top: 16px; font-size: 13px; color: var(--cyan); min-height: 1.4em; }

@media (max-width: 1080px) {
  .split { grid-template-columns: 1fr; }
  .split--rev > :first-child { order: 0; }
  .split__aside { position: static; }
  .pgrid { grid-template-columns: repeat(2, 1fr); }
  .pgrid .media:nth-child(1) { grid-column: span 2; }
}

@media (max-width: 860px) {
  .pgrid { grid-template-columns: 1fr; }
  .pgrid .media:nth-child(1) { grid-column: auto; }
  .band-cap .wrap { flex-direction: column; align-items: flex-start; }
}

/* print */
@media print {
  body::before, body::after, .site-header, .mobile-nav, .site-footer, .btn { display: none !important; }
  body { background: #fff; color: #111; }
}

.nowrap { white-space: nowrap; }

/* ==========================================================================
   移动端细化（390 / 360 宽度下的表格、指标条、锚点条）
   ========================================================================== */
html { -webkit-text-size-adjust: 100%; }

@media (max-width: 560px) {
  .tbl { font-size: 12.5px; }
  .tbl th { padding: 9px 10px; font-size: 10.5px; letter-spacing: 0.1em; }
  .tbl td { padding: 11px 10px; }
  .tbl th:first-child, .tbl td:first-child { white-space: nowrap; }

  .case-facts { gap: 14px; flex-wrap: wrap; }
  .case-facts b { font-size: 14px; }

  .subnav { gap: 6px; padding: 10px 0; }
  .subnav a { padding: 8px 12px; font-size: 12.5px; }

  .check-list li { font-size: 13.5px; padding-left: 22px; }
  .quote { font-size: 16px; }
  .mod { padding: 18px 18px 20px; }
  .acc-head { padding: 15px 0; }
}

/* ── GEO：宽表格容器与 FAQ 版式 ───────────────────────────────── */
.tbl-wrap { overflow-x: auto; }
.tbl-wrap .tbl { min-width: 720px; }
.faq-group { margin-top: 54px; }
.faq-group:first-child { margin-top: 0; }
.faq-item { padding: 20px 0; border-bottom: 1px solid var(--line); }
.faq-item:last-child { border-bottom: 0; }
.faq-item h3 { font-size: 16.5px; font-weight: 600; color: var(--text); margin: 0 0 8px; }
.faq-item p { font-size: 14.5px; line-height: 1.85; color: var(--text-2); margin: 0; max-width: 80ch; }
@media (max-width: 860px) {
  .tbl-wrap { margin: 0 -16px; padding: 0 16px; }
}

.tbl code, .note code, .info-row code { font-family: var(--font-mono); font-size: .92em; color: var(--cyan); background: rgba(63, 224, 255, .08); border: 1px solid rgba(63, 224, 255, .18); border-radius: 2px; padding: 1px 6px; }

.card h3 a:hover { color: var(--cyan); }
.kb-meta { font-family: var(--font-mono); font-size: 11px; letter-spacing: .16em; color: var(--muted); }