/* =========================================================
   尚合AI · SCOAI.cn  —  Global Stylesheet
   ========================================================= */

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

:root {
  --bg: #060C18;
  --panel: #0B1626;
  --panel-2: #0F1D31;
  --line: rgba(140, 175, 225, .13);
  --line-strong: rgba(140, 175, 225, .26);

  --text: #E9F0FA;
  --text-2: #A8BBD5;
  --text-3: #7186A5;

  --cyan: #2FE3D0;
  --blue: #4C8DFF;
  --violet: #8B7BFF;
  --gold: #E5B25D;

  --grad: linear-gradient(115deg, #2FE3D0 0%, #45A8FF 55%, #7C8BFF 100%);
  --grad-soft: linear-gradient(115deg, rgba(47,227,208,.16), rgba(76,141,255,.16));

  --radius-lg: 22px;
  --radius: 18px;
  --radius-sm: 12px;

  --maxw: 1240px;
  --font: "PingFang SC", "HarmonyOS Sans SC", "Source Han Sans SC",
          "Noto Sans SC", "Microsoft YaHei", system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono: "SFMono-Regular", "JetBrains Mono", "Cascadia Mono", Consolas, "Courier New", monospace;

  --shadow-card: 0 30px 60px -40px rgba(0, 0, 0, .95);
  --ease: cubic-bezier(.22, .61, .36, 1);
}

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: 136px;
}

body {
  margin: 0;
  color: var(--text);
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  letter-spacing: .005em;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
  background-color: var(--bg);
  background-image:
    radial-gradient(1100px 720px at 84% -14%, rgba(76, 141, 255, .20), transparent 62%),
    radial-gradient(820px 520px at 2% 2%, rgba(47, 227, 208, .10), transparent 60%),
    radial-gradient(1000px 760px at 50% 118%, rgba(139, 123, 255, .13), transparent 62%);
  background-repeat: no-repeat;
  background-attachment: fixed;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
h1, h2, h3, h4, p, ul, ol, figure { margin: 0; }
ul, ol { padding: 0; list-style: none; }
::selection { background: rgba(47, 227, 208, .26); }

:focus-visible {
  outline: 2px solid var(--cyan);
  outline-offset: 3px;
  border-radius: 6px;
}

/* ============ Layout helpers ============ */
.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 28px;
}

.section { padding: 108px 0; position: relative; }
.section.tight { padding: 76px 0; }
.section.alt {
  background: linear-gradient(180deg, rgba(255,255,255,.022), rgba(255,255,255,0) 70%);
  border-top: 1px solid var(--line);
}
.section-line { border-top: 1px solid var(--line); }

.section-head { max-width: 760px; margin-bottom: 52px; }
.section-head.center { margin-inline: auto; text-align: center; }

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-size: 12.5px;
  font-weight: 600;
  letter-spacing: .14em;
  color: var(--cyan);
}
.eyebrow::before {
  content: "";
  width: 6px; height: 6px;
  border-radius: 2px;
  background: var(--cyan);
  box-shadow: 0 0 14px var(--cyan);
}

h2.section-title {
  margin: 16px 0 18px;
  font-size: clamp(27px, 3.3vw, 42px);
  line-height: 1.24;
  font-weight: 700;
  letter-spacing: -.015em;
}

.section-desc {
  color: var(--text-2);
  font-size: 16.5px;
  line-height: 1.85;
  max-width: 660px;
}
.section-head.center .section-desc { margin-inline: auto; }

.grad-text {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

/* ============ Buttons ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 9px;
  height: 48px;
  padding: 0 24px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: .01em;
  white-space: nowrap;
  transition: transform .28s var(--ease), box-shadow .28s var(--ease),
              background .28s var(--ease), border-color .28s var(--ease);
}
.btn svg { width: 16px; height: 16px; }

.btn-primary {
  color: #04121F;
  background: linear-gradient(115deg, #35E7D4, #4FA6FF 62%, #7F8DFF);
  box-shadow: 0 14px 34px -16px rgba(79, 166, 255, .9);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 20px 44px -16px rgba(79, 166, 255, 1);
}

.btn-ghost {
  color: var(--text);
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, .035);
}
.btn-ghost:hover {
  transform: translateY(-2px);
  border-color: rgba(47, 227, 208, .5);
  background: rgba(255, 255, 255, .07);
}

.btn-sm { height: 42px; padding: 0 18px; font-size: 14px; }

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-size: 14.5px;
  font-weight: 600;
  color: var(--cyan);
}
.link-arrow svg { width: 15px; height: 15px; transition: transform .3s var(--ease); }
.link-arrow:hover svg { transform: translateX(4px); }

/* ============ Header ============ */
.site-header {
  --head-h: 112px;
  --mark-h: 76px;
  --mark-w: 121px;
  --b1: 34px;
  --b2: 20px;
  --b-gap: 14px;
  position: sticky;
  top: 0;
  z-index: 100;
  transition: background .35s var(--ease), border-color .35s var(--ease),
              backdrop-filter .35s var(--ease);
  border-bottom: 1px solid transparent;
}
/* 滚动后整条页头收窄，logo 与字标同步缩小 */
.site-header.is-scrolled {
  --head-h: 74px;
  --mark-h: 48px;
  --mark-w: 76px;
  --b1: 22px;
  --b2: 13px;
  --b-gap: 10px;
  background: rgba(6, 12, 24, .82);
  backdrop-filter: blur(20px) saturate(140%);
  -webkit-backdrop-filter: blur(20px) saturate(140%);
  border-bottom-color: var(--line);
}

.header-inner {
  display: flex;
  align-items: center;
  gap: 34px;
  height: var(--head-h);
  transition: height .34s var(--ease);
}

.brand {
  display: flex;
  align-items: center;
  gap: var(--b-gap, 14px);
  flex-shrink: 0;
  transition: gap .34s var(--ease);
}
.brand-mark {
  display: grid;
  place-items: center;
  width: var(--mark-w, 121px);
  height: var(--mark-h, 76px);
  filter: drop-shadow(0 6px 16px rgba(47, 227, 208, .16));
  transition: width .34s var(--ease), height .34s var(--ease),
              transform .45s var(--ease), filter .45s var(--ease);
}
.brand-mark svg, .brand-mark img { width: 100%; height: 100%; display: block; }
.brand:hover .brand-mark { transform: translateY(-1px) scale(1.03); filter: drop-shadow(0 8px 22px rgba(76, 141, 255, .3)); }
.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-text strong {
  font-size: var(--b1, 34px);
  font-weight: 700;
  letter-spacing: .01em;
  transition: font-size .34s var(--ease);
}
.brand-text em {
  display: flex;
  align-items: baseline;
  font-style: normal;
  font-size: var(--b2, 20px);
  font-weight: 600;
  color: var(--text-3);
  margin-top: 6px;
  line-height: 1;
  transition: font-size .34s var(--ease), margin-top .34s var(--ease);
}
.brand-text .wm-g {
  color: #58DCEC;
  letter-spacing: .16em;
  font-weight: 700;
  background: linear-gradient(100deg, #3CE7D2 0%, #67B8FF 54%, #A99BFF 100%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}
.brand-text .wm-tld {
  letter-spacing: .03em;
  font-size: .94em;
  color: var(--cyan);
  font-weight: 700;
  margin-left: 2px;
  -webkit-text-fill-color: var(--cyan);
}

.nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: 12px;
}
.nav > a,
.nav-item > a {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 9px 14px;
  border-radius: 10px;
  white-space: nowrap;
  flex-shrink: 0;
  font-size: 15px;
  color: var(--text-2);
  transition: color .25s var(--ease), background .25s var(--ease);
}
.nav > a:hover,
.nav-item > a:hover { color: var(--text); background: rgba(255, 255, 255, .05); }
.nav > a.is-active,
.nav-item > a.is-active { color: var(--text); }
.nav > a.is-active::after,
.nav-item > a.is-active::after {
  content: "";
  position: absolute;
}
.nav > a,
.nav-item > a { position: relative; }
.nav > a.is-active::after,
.nav-item > a.is-active::after {
  left: 14px; right: 14px; bottom: 2px;
  height: 2px;
  border-radius: 2px;
  background: var(--grad);
}
.nav-item { position: relative; }
.nav-item > a svg { width: 13px; height: 13px; opacity: .6; transition: transform .25s var(--ease); }
.nav-item:hover > a svg { transform: rotate(180deg); }

.nav-menu {
  position: absolute;
  top: calc(100% + 10px);
  left: 50%;
  transform: translate(-50%, 8px);
  width: 300px;
  padding: 10px;
  border-radius: 16px;
  border: 1px solid var(--line-strong);
  background: rgba(10, 20, 34, .97);
  backdrop-filter: blur(24px);
  box-shadow: 0 30px 60px -24px rgba(0, 0, 0, .9);
  opacity: 0;
  visibility: hidden;
  transition: opacity .25s var(--ease), transform .25s var(--ease), visibility .25s;
}
.nav-item:hover .nav-menu,
.nav-item:focus-within .nav-menu {
  opacity: 1;
  visibility: visible;
  transform: translate(-50%, 0);
}
.nav-menu a {
  display: block;
  padding: 11px 13px;
  border-radius: 10px;
  transition: background .22s var(--ease);
}
.nav-menu a:hover { background: rgba(255, 255, 255, .06); }
.nav-menu b { display: block; font-size: 14.5px; font-weight: 600; }
.nav-menu span { display: block; font-size: 12.5px; color: var(--text-3); margin-top: 2px; }

.header-actions { margin-left: auto; display: flex; align-items: center; gap: 10px; }

.nav-toggle {
  display: none;
  width: 42px; height: 42px;
  border-radius: 10px;
  border: 1px solid var(--line-strong);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
}
.nav-toggle span {
  display: block;
  width: 17px; height: 1.5px;
  background: var(--text);
  border-radius: 2px;
  transition: transform .3s var(--ease), opacity .3s var(--ease);
}
.nav-open .nav-toggle span:nth-child(1) { transform: translateY(6.5px) rotate(45deg); }
.nav-open .nav-toggle span:nth-child(2) { opacity: 0; }
.nav-open .nav-toggle span:nth-child(3) { transform: translateY(-6.5px) rotate(-45deg); }

/* ============ Hero ============ */
.hero {
  position: relative;
  padding: 78px 0 96px;
  overflow: hidden;
}
.hero-grid {
  display: grid;
  grid-template-columns: 1.04fr .96fr;
  gap: 60px;
  align-items: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 7px 15px 7px 11px;
  border-radius: 999px;
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, .04);
  font-size: 12.5px;
  color: var(--text-2);
  letter-spacing: .02em;
}
.hero-badge .dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(47, 227, 208, .16);
}

h1.hero-title {
  margin: 24px 0 0;
  font-size: clamp(36px, 4.5vw, 60px);
  line-height: 1.14;
  font-weight: 800;
  letter-spacing: -.025em;
}
h1.hero-title .line { display: block; }

.hero-sub {
  margin-top: 24px;
  max-width: 560px;
  font-size: 16.5px;
  line-height: 1.9;
  color: var(--text-2);
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; margin-top: 34px; }

.hero-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 10px 24px;
  margin-top: 38px;
  font-size: 13.5px;
  color: var(--text-3);
}
.hero-tags li { display: inline-flex; align-items: center; gap: 7px; }
.hero-tags svg { width: 14px; height: 14px; color: var(--cyan); flex-shrink: 0; }

/* Hero visual — console mock */
.hero-visual { position: relative; }

.hv-rings {
  position: absolute;
  inset: -22% -14%;
  pointer-events: none;
  z-index: 0;
}
.hv-rings svg { width: 100%; height: 100%; overflow: visible; }
.hv-rings .spin-a { transform-origin: 280px 280px; animation: spin 46s linear infinite; }
.hv-rings .spin-b { transform-origin: 280px 280px; animation: spin 84s linear infinite reverse; }
@keyframes spin { to { transform: rotate(360deg); } }

.hv-glow {
  position: absolute;
  left: 50%; top: 46%;
  width: 78%;
  aspect-ratio: 1;
  transform: translate(-50%, -50%);
  background: radial-gradient(circle, rgba(76, 141, 255, .30), rgba(47, 227, 208, .10) 45%, transparent 68%);
  filter: blur(18px);
  pointer-events: none;
}

.console {
  position: relative;
  z-index: 2;
  padding: 20px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line-strong);
  background: linear-gradient(158deg, rgba(22, 40, 66, .96), rgba(8, 16, 28, .99));
  box-shadow: 0 46px 90px -46px rgba(0, 0, 0, .95),
              inset 0 1px 0 rgba(255, 255, 255, .07);
  backdrop-filter: blur(12px);
}

.console-head {
  display: flex;
  align-items: center;
  gap: 10px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--line);
}
.console-head .led {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(47, 227, 208, .12);
  animation: pulse 2.4s var(--ease) infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: .55; transform: scale(.82); }
}
.console-title { font-size: 13.5px; font-weight: 600; letter-spacing: .02em; }
.console-badge {
  margin-left: auto;
  padding: 3px 10px;
  border-radius: 999px;
  font-size: 11.5px;
  color: #06221E;
  background: rgba(47, 227, 208, .92);
  font-weight: 700;
}

.console-rows { display: grid; gap: 1px; margin: 4px 0 0; }
.console-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 2px;
  border-bottom: 1px dashed rgba(140, 175, 225, .11);
  font-size: 13px;
}
.console-row:last-child { border-bottom: 0; }
.console-row .k { color: var(--text-3); }
.console-row .v {
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--text);
  letter-spacing: .01em;
}
.console-row .v.ok { color: var(--cyan); }
.console-row .v b { font-weight: 600; }

.spark-wrap {
  margin-top: 12px;
  padding: 14px 14px 6px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: rgba(47, 227, 208, .045);
}
.spark-meta {
  display: flex;
  justify-content: space-between;
  font-size: 11.5px;
  color: var(--text-3);
  letter-spacing: .04em;
  margin-bottom: 6px;
}
.spark { width: 100%; height: 56px; }

.console-chips { display: flex; gap: 8px; margin-top: 14px; }
.console-chips span {
  flex: 1;
  text-align: center;
  padding: 9px 6px;
  border-radius: 10px;
  font-size: 12px;
  color: var(--text-2);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, .03);
}

.float-card {
  position: absolute;
  z-index: 3;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 15px;
  border-radius: 14px;
  border: 1px solid var(--line-strong);
  background: rgba(12, 23, 39, .94);
  backdrop-filter: blur(14px);
  box-shadow: 0 20px 40px -22px rgba(0, 0, 0, .95);
  font-size: 12.5px;
  animation: floaty 7s ease-in-out infinite;
}
.float-card .fc-k { color: var(--text-3); display: block; font-size: 11px; letter-spacing: .06em; }
.float-card .fc-v { display: block; font-weight: 700; font-size: 14px; margin-top: 1px; }
.fc-1 { right: -22px; top: -26px; }
.fc-2 { left: -34px; bottom: -18px; animation-delay: -3.5s; }
@keyframes floaty {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-8px); }
}

/* ============ Trust strip ============ */
.trust {
  padding: 22px 0;
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, .018);
}
.trust-inner {
  display: flex;
  align-items: center;
  gap: 14px 34px;
  flex-wrap: wrap;
  justify-content: space-between;
}
.trust-label { font-size: 12.5px; color: var(--text-3); letter-spacing: .1em; }
.trust-list { display: flex; flex-wrap: wrap; gap: 12px 32px; }
.trust-list li {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 13.5px;
  color: var(--text-2);
}
.trust-list svg { width: 15px; height: 15px; color: rgba(47, 227, 208, .85); }

/* ============ Stats ============ */
.stats {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--line);
  gap: 1px;
}
.stat {
  padding: 30px 26px;
  background: rgba(8, 16, 28, .92);
}
.stat-num {
  font-size: clamp(28px, 3vw, 38px);
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -.02em;
}
.stat-num small { font-size: 15px; font-weight: 600; margin-left: 4px; color: var(--text-2); }
.stat-label { margin-top: 10px; font-size: 13.5px; color: var(--text-3); }

/* ============ Card grids ============ */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; }

.card {
  position: relative;
  padding: 28px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: linear-gradient(178deg, rgba(255, 255, 255, .048), rgba(255, 255, 255, .012));
  box-shadow: var(--shadow-card);
  transition: transform .38s var(--ease), border-color .38s var(--ease),
              box-shadow .38s var(--ease), background .38s var(--ease);
}
.card:hover {
  transform: translateY(-4px);
  border-color: rgba(47, 227, 208, .32);
  box-shadow: 0 34px 64px -40px rgba(47, 227, 208, .55);
}

.icon-box {
  display: grid;
  place-items: center;
  width: 44px; height: 44px;
  border-radius: 12px;
  margin-bottom: 20px;
  color: var(--cyan);
  background: rgba(47, 227, 208, .10);
  border: 1px solid rgba(47, 227, 208, .22);
}
.icon-box svg { width: 21px; height: 21px; }
.icon-box.blue { color: #7FB4FF; background: rgba(76, 141, 255, .12); border-color: rgba(76, 141, 255, .26); }
.icon-box.violet { color: #B4A8FF; background: rgba(139, 123, 255, .12); border-color: rgba(139, 123, 255, .26); }
.icon-box.gold { color: #EFC98A; background: rgba(229, 178, 93, .12); border-color: rgba(229, 178, 93, .26); }

.card h3 { font-size: 18.5px; font-weight: 650; letter-spacing: -.005em; margin-bottom: 9px; }
.card p { font-size: 14.5px; line-height: 1.8; color: var(--text-2); }
.card .micro { font-size: 12.5px; color: var(--text-3); margin-top: 14px; }

.numbered { counter-reset: n; }
.numbered .card::after {
  counter-increment: n;
  content: "0" counter(n);
  position: absolute;
  top: 24px; right: 26px;
  font-family: var(--mono);
  font-size: 12px;
  color: rgba(140, 175, 225, .35);
}

/* ============ Architecture ============ */
.arch-wrap {
  display: grid;
  grid-template-columns: 1.15fr .85fr;
  gap: 44px;
  align-items: center;
}
.arch {
  position: relative;
  padding: 22px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line-strong);
  background: linear-gradient(160deg, rgba(16, 30, 50, .95), rgba(8, 15, 26, .98));
  box-shadow: var(--shadow-card);
}
.arch::before {
  content: "全程运行在企业内网 / ON-PREMISE";
  display: block;
  font-family: var(--mono);
  font-size: 10.5px;
  letter-spacing: .14em;
  color: rgba(47, 227, 208, .8);
  margin-bottom: 16px;
}
.layer {
  display: flex;
  align-items: center;
  gap: 18px;
  padding: 16px 18px;
  border-radius: 13px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, .028);
  margin-bottom: 9px;
}
.layer:last-child { margin-bottom: 0; }
.layer-tag {
  flex-shrink: 0;
  width: 62px;
  font-size: 12px;
  color: var(--text-3);
  letter-spacing: .1em;
}
.layer-body { display: flex; flex-wrap: wrap; gap: 7px; }
.layer-body span {
  padding: 4px 10px;
  border-radius: 7px;
  font-size: 12.5px;
  color: var(--text-2);
  background: rgba(255, 255, 255, .05);
  border: 1px solid var(--line);
}
.layer.hot { border-color: rgba(47, 227, 208, .3); background: rgba(47, 227, 208, .06); }
.layer.hot .layer-tag { color: var(--cyan); }
.layer.hot .layer-body span { border-color: rgba(47, 227, 208, .22); color: #CFF8F3; }

.check-list { display: grid; gap: 16px; }
.check-list li {
  display: flex;
  gap: 12px;
  font-size: 15px;
  color: var(--text-2);
  line-height: 1.75;
}
.check-list li b { color: var(--text); font-weight: 600; }
.check-list svg {
  flex-shrink: 0;
  width: 19px; height: 19px;
  margin-top: 4px;
  color: var(--cyan);
}

/* ============ Product cards ============ */
.product-card {
  --accent: #4C8DFF;
  --accent-rgb: 76, 141, 255;
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 30px 28px 26px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  background:
    radial-gradient(120% 90% at 100% 0%, rgba(var(--accent-rgb), .14), transparent 58%),
    linear-gradient(178deg, rgba(255, 255, 255, .05), rgba(255, 255, 255, .012));
  box-shadow: var(--shadow-card);
  overflow: hidden;
  transition: transform .4s var(--ease), border-color .4s var(--ease), box-shadow .4s var(--ease);
}
.product-card:hover {
  transform: translateY(-6px);
  border-color: rgba(var(--accent-rgb), .45);
  box-shadow: 0 40px 70px -42px rgba(var(--accent-rgb), .8);
}
.product-card.cyan { --accent: #2FE3D0; --accent-rgb: 47, 227, 208; }
.product-card.violet { --accent: #A395FF; --accent-rgb: 163, 149, 255; }
.product-card.gold { --accent: #E5B25D; --accent-rgb: 229, 178, 93; }

.pc-top { display: flex; align-items: center; gap: 10px; margin-bottom: 22px; }
.pc-icon {
  display: grid; place-items: center;
  width: 46px; height: 46px;
  border-radius: 13px;
  color: var(--accent);
  background: rgba(var(--accent-rgb), .12);
  border: 1px solid rgba(var(--accent-rgb), .28);
}
.pc-icon svg { width: 22px; height: 22px; }
.pc-kicker {
  font-size: 11.5px;
  letter-spacing: .16em;
  color: var(--accent);
  font-weight: 600;
}
.product-card h3 {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -.01em;
  margin-bottom: 10px;
}
.pc-tagline {
  font-size: 14.5px;
  line-height: 1.75;
  color: var(--text-2);
  padding-bottom: 20px;
  margin-bottom: 20px;
  border-bottom: 1px dashed rgba(140, 175, 225, .16);
}
.pc-list { display: grid; gap: 11px; margin-bottom: 26px; flex: 1; }
.pc-list li {
  position: relative;
  padding-left: 18px;
  font-size: 14px;
  color: var(--text-2);
  line-height: 1.65;
}
.pc-list li::before {
  content: "";
  position: absolute;
  left: 0; top: 9px;
  width: 5px; height: 5px;
  border-radius: 1.5px;
  background: var(--accent);
  opacity: .85;
}
.pc-foot { display: flex; align-items: center; justify-content: space-between; }
.pc-foot .link-arrow { color: var(--accent); }

/* ============ Steps ============ */
.steps {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0;
  border-top: 1px solid var(--line-strong);
  position: relative;
}
.step {
  position: relative;
  padding: 30px 22px 0 0;
}
.step::before {
  content: "";
  position: absolute;
  top: -4px; left: 0;
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--cyan);
  box-shadow: 0 0 0 4px rgba(47, 227, 208, .14);
}
.step-n {
  font-family: var(--mono);
  font-size: 11.5px;
  letter-spacing: .12em;
  color: var(--text-3);
}
.step h4 { margin: 8px 0 8px; font-size: 16.5px; font-weight: 650; }
.step p { font-size: 13.5px; line-height: 1.7; color: var(--text-3); }

/* ============ CTA band ============ */
.cta-band { padding: 0 0 100px; }
.cta-inner {
  position: relative;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
  padding: 52px 56px;
  border-radius: 26px;
  border: 1px solid rgba(120, 180, 230, .24);
  background:
    radial-gradient(90% 160% at 88% 0%, rgba(76, 141, 255, .22), transparent 60%),
    radial-gradient(70% 140% at 6% 100%, rgba(47, 227, 208, .14), transparent 60%),
    linear-gradient(120deg, rgba(16, 30, 50, .95), rgba(9, 17, 30, .98));
  overflow: hidden;
}
.cta-inner::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(140, 175, 225, .07) 1px, transparent 1px),
                    linear-gradient(90deg, rgba(140, 175, 225, .07) 1px, transparent 1px);
  background-size: 54px 54px;
  mask-image: radial-gradient(70% 90% at 80% 30%, #000, transparent 75%);
  -webkit-mask-image: radial-gradient(70% 90% at 80% 30%, #000, transparent 75%);
  pointer-events: none;
}
.cta-copy { position: relative; z-index: 1; max-width: 620px; }
.cta-copy h2 {
  font-size: clamp(24px, 2.7vw, 34px);
  line-height: 1.3;
  font-weight: 700;
  letter-spacing: -.015em;
}
.cta-copy p { margin-top: 12px; font-size: 15px; color: var(--text-2); }
.cta-actions { position: relative; z-index: 1; display: flex; gap: 12px; flex-wrap: wrap; }

/* ============ Footer ============ */
.site-footer {
  border-top: 1px solid var(--line);
  background: linear-gradient(180deg, rgba(255, 255, 255, .018), rgba(4, 8, 16, .9));
}
.footer-main {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 44px;
  padding: 66px 0 46px;
}
.footer-brand .brand { margin-bottom: 18px; --mark-w: 104px; --mark-h: 65px; --b1: 28px; --b2: 16px; --b-gap: 12px; }
.footer-brand p {
  font-size: 13.5px;
  line-height: 1.85;
  color: var(--text-3);
  max-width: 300px;
}.footer-col h4 {
  font-size: 12.5px;
  letter-spacing: .14em;
  color: var(--text-3);
  font-weight: 600;
  margin-bottom: 16px;
}
.footer-col a {
  display: block;
  padding: 6px 0;
  font-size: 14px;
  color: var(--text-2);
  transition: color .22s var(--ease), transform .22s var(--ease);
}
.footer-col a:hover { color: var(--cyan); transform: translateX(3px); }

.footer-legal {
  padding: 26px 0 34px;
  border-top: 1px solid var(--line);
}
.footer-legal p {
  font-size: 13px;
  line-height: 2;
  color: var(--text-3);
  letter-spacing: .01em;
}
.footer-legal p:first-child { color: var(--text-2); font-weight: 500; }
.footer-legal a { color: var(--text-3); transition: color .2s; }
.footer-legal a:hover { color: var(--cyan); }

/* ============ Inner page hero ============ */
.page-hero {
  position: relative;
  padding: 62px 0 62px;
  border-bottom: 1px solid var(--line);
  overflow: hidden;
}
.page-hero::before {
  content: "";
  position: absolute;
  right: -8%; top: -70%;
  width: 720px; height: 720px;
  background: radial-gradient(circle, rgba(76, 141, 255, .18), transparent 64%);
  pointer-events: none;
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 12.5px;
  color: var(--text-3);
  margin-bottom: 22px;
}
.breadcrumb a { transition: color .2s; }
.breadcrumb a:hover { color: var(--cyan); }
.breadcrumb span { opacity: .5; }
.page-hero h1 {
  font-size: clamp(30px, 4vw, 50px);
  line-height: 1.2;
  font-weight: 800;
  letter-spacing: -.025em;
  max-width: 900px;
}
.page-hero .lede {
  margin-top: 20px;
  max-width: 680px;
  font-size: 16.5px;
  line-height: 1.9;
  color: var(--text-2);
}
.page-hero-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}
.chip {
  padding: 6px 13px;
  border-radius: 999px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, .035);
  font-size: 12.5px;
  color: var(--text-2);
}
.chip.accent { border-color: rgba(47, 227, 208, .3); color: #B9F5EE; background: rgba(47, 227, 208, .08); }

/* ============ Split blocks ============ */
.split {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: start;
}
.split.wide-left { grid-template-columns: 1.1fr .9fr; }
.split h2 { font-size: clamp(24px, 2.8vw, 34px); line-height: 1.3; font-weight: 700; letter-spacing: -.015em; }
.split p { color: var(--text-2); font-size: 15.5px; line-height: 1.95; }
.split p + p { margin-top: 16px; }

.quote-card {
  padding: 30px;
  border-radius: var(--radius);
  border: 1px solid rgba(47, 227, 208, .22);
  background: linear-gradient(160deg, rgba(47, 227, 208, .08), rgba(76, 141, 255, .04));
}
.quote-card p {
  font-size: 15.5px;
  line-height: 1.9;
  color: #D6E6F7;
}
.quote-card .q-mark {
  font-size: 32px;
  line-height: 1;
  color: var(--cyan);
  opacity: .5;
  margin-bottom: 10px;
  font-family: Georgia, serif;
}

/* ============ Pain points ============ */
.pain {
  padding: 24px 22px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, .026);
}
.pain .p-n {
  font-family: var(--mono);
  font-size: 11px;
  letter-spacing: .1em;
  color: rgba(229, 178, 93, .8);
}
.pain h4 { margin: 8px 0 6px; font-size: 15.5px; font-weight: 620; }
.pain p { font-size: 13.5px; line-height: 1.7; color: var(--text-3); }

/* ============ Table ============ */
.table-wrap {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
  background: rgba(255, 255, 255, .018);
}
.spec { width: 100%; border-collapse: collapse; font-size: 14.5px; }
.spec th, .spec td {
  padding: 15px 18px;
  text-align: left;
  vertical-align: top;
  border-bottom: 1px solid var(--line);
}
.spec thead th {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: .1em;
  color: var(--text-3);
  background: rgba(255, 255, 255, .03);
  white-space: nowrap;
}
.spec tbody tr:last-child td { border-bottom: 0; }
.spec tbody tr:hover { background: rgba(255, 255, 255, .022); }
.spec td:first-child { color: var(--text); font-weight: 550; width: 20%; white-space: nowrap; }
.spec td { color: var(--text-2); }
.spec .hl { color: var(--cyan); }

/* ============ Timeline ============ */
.timeline { display: grid; gap: 0; }
.tl-item {
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 30px;
  padding: 26px 0;
  border-bottom: 1px solid var(--line);
}
.tl-item:last-child { border-bottom: 0; }
.tl-key { font-size: 13px; color: var(--cyan); letter-spacing: .06em; font-weight: 600; }
.tl-body h4 { font-size: 16.5px; font-weight: 620; margin-bottom: 6px; }
.tl-body p { font-size: 14px; color: var(--text-3); line-height: 1.75; }

/* ============ Contact ============ */
.contact-grid {
  display: grid;
  grid-template-columns: .9fr 1.1fr;
  gap: 46px;
  align-items: start;
}
.info-list { display: grid; gap: 14px; }
.info-item {
  display: flex;
  gap: 15px;
  padding: 20px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, .026);
}
.info-item .icon-box { margin: 0; width: 38px; height: 38px; border-radius: 10px; flex-shrink: 0; }
.info-item .icon-box svg { width: 18px; height: 18px; }
.info-item .i-k { font-size: 12px; color: var(--text-3); letter-spacing: .08em; }
.info-item .i-v { font-size: 14.5px; line-height: 1.7; color: var(--text); margin-top: 4px; }

.form-card {
  padding: 34px;
  border-radius: var(--radius-lg);
  border: 1px solid var(--line-strong);
  background: linear-gradient(165deg, rgba(18, 33, 54, .9), rgba(9, 17, 29, .96));
  box-shadow: var(--shadow-card);
}
.form { display: grid; gap: 16px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.field { display: grid; gap: 8px; }
.field label { font-size: 13px; color: var(--text-2); }
.field label em { font-style: normal; color: var(--cyan); }
.input, .textarea, .select {
  width: 100%;
  padding: 13px 15px;
  border-radius: 11px;
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, .035);
  color: var(--text);
  font: inherit;
  font-size: 14.5px;
  transition: border-color .22s var(--ease), box-shadow .22s var(--ease), background .22s;
}
.input::placeholder, .textarea::placeholder { color: #5A6E8C; }
.input:focus, .textarea:focus, .select:focus {
  outline: none;
  border-color: rgba(47, 227, 208, .55);
  box-shadow: 0 0 0 4px rgba(47, 227, 208, .1);
  background: rgba(255, 255, 255, .05);
}
.textarea { min-height: 118px; resize: vertical; }
.select { appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%237186A5' stroke-width='2.4'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 15px center; }
.form-note { font-size: 12.5px; color: var(--text-3); line-height: 1.7; }

/* Toast */
.toast {
  position: fixed;
  left: 50%;
  bottom: 36px;
  transform: translate(-50%, 20px);
  z-index: 999;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 13px 22px;
  border-radius: 999px;
  border: 1px solid rgba(47, 227, 208, .4);
  background: rgba(8, 28, 30, .96);
  backdrop-filter: blur(16px);
  color: #CFF7F2;
  font-size: 14px;
  box-shadow: 0 24px 50px -20px rgba(0, 0, 0, .9);
  opacity: 0;
  visibility: hidden;
  transition: opacity .3s var(--ease), transform .3s var(--ease), visibility .3s;
}
.toast.show { opacity: 1; visibility: visible; transform: translate(-50%, 0); }

/* ============ Reveal animation ============ */
.js .reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .8s var(--ease), transform .8s var(--ease);
  will-change: opacity, transform;
}
.js .reveal.in { opacity: 1; transform: none; }

/* ============ Responsive ============ */
@media (max-width: 1120px) {
  .nav, .header-actions .btn-ghost { display: none; }
  .nav-toggle { display: flex; }
  .header-actions { gap: 8px; }

  .nav {
    position: fixed;
    inset: var(--head-h) 0 auto;
    display: block;
    padding: 18px 24px 30px;
    margin: 0;
    background: rgba(6, 12, 24, .985);
    backdrop-filter: blur(24px);
    border-bottom: 1px solid var(--line);
    transform: translateY(-14px);
    opacity: 0;
    visibility: hidden;
    transition: opacity .3s var(--ease), transform .3s var(--ease), visibility .3s;
    max-height: calc(100vh - var(--head-h));
    overflow-y: auto;
  }
  .nav-open .nav {
    opacity: 1; visibility: visible; transform: none;
  }
  .nav > a, .nav-item > a {
    display: flex;
    padding: 14px 4px;
    font-size: 16px;
    border-bottom: 1px solid var(--line);
    border-radius: 0;
  }
  .nav > a.is-active::after, .nav-item > a.is-active::after { display: none; }
  .nav-item { display: block; }
  .nav-menu {
    position: static;
    width: auto;
    transform: none;
    opacity: 1;
    visibility: visible;
    background: transparent;
    border: 0;
    box-shadow: none;
    backdrop-filter: none;
    padding: 4px 0 10px 10px;
  }
  .nav-menu a { padding: 9px 8px; }
  .nav-menu span { display: none; }

  .grid-3 { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .stats { grid-template-columns: repeat(2, 1fr); }
  .split, .split.wide-left { grid-template-columns: 1fr; gap: 32px; }
  .cta-inner { flex-direction: column; align-items: flex-start; padding: 38px 30px; gap: 26px; }
  .tl-item { grid-template-columns: 1fr; gap: 8px; }
  .form-row { grid-template-columns: 1fr; }
}

@media (max-width: 1080px) {
  .hero-grid { grid-template-columns: 1fr; gap: 60px; }
  .hero-visual { max-width: 560px; margin: 0 auto; width: 100%; }
  .hero-sub { max-width: 640px; }
  .arch-wrap { grid-template-columns: 1fr; gap: 32px; }
  .steps { grid-template-columns: repeat(2, 1fr); gap: 26px 0; border-top: 0; }
  .step { padding: 0 22px 0 0; }
  .step::before { display: none; }
  .step { border-top: 1px solid var(--line-strong); padding-top: 22px; }
  .step::after {
    content: "";
    position: absolute;
    top: -4px; left: 0;
    width: 7px; height: 7px;
    border-radius: 50%;
    background: var(--cyan);
    box-shadow: 0 0 0 4px rgba(47, 227, 208, .14);
  }
  .footer-main { grid-template-columns: 1fr 1fr; gap: 36px; }
  .split { gap: 40px; }
  .contact-grid { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 640px) {
  .container { padding: 0 20px; }
  /* 窄屏用更小的一档 logo 与页头 */
  .site-header {
    --head-h: 84px; --mark-h: 52px; --mark-w: 83px;
    --b1: 24px; --b2: 14px; --b-gap: 10px;
  }
  .site-header.is-scrolled {
    --head-h: 62px; --mark-h: 38px; --mark-w: 60px;
    --b1: 18px; --b2: 11px; --b-gap: 8px;
  }
  .header-actions .btn { display: none; }
  .section { padding: 72px 0; }
  .hero { padding: 46px 0 64px; }
  .page-hero { padding: 40px 0 44px; }
  h1.hero-title { font-size: 34px; }
  .hero-tags { gap: 10px 18px; font-size: 12.5px; }
  .btn { height: 46px; padding: 0 20px; font-size: 14.5px; }
  .hero-actions .btn { flex: 1 1 auto; }
  .stats { grid-template-columns: 1fr 1fr; }
  .stat { padding: 22px 18px; }
  .card { padding: 24px; }
  .product-card { padding: 26px 22px; }
  .footer-main { grid-template-columns: 1fr; gap: 30px; padding: 48px 0 34px; }
  .cta-band { padding-bottom: 72px; }
  .grid-4 { grid-template-columns: 1fr; }
  .console { padding: 16px; }
  .float-card { display: none; }
  .form-card { padding: 24px 20px; }
  .arch { padding: 16px; }
  .layer { flex-direction: column; align-items: flex-start; gap: 10px; }
  .spec th, .spec td { padding: 12px 14px; font-size: 13.5px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: .001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .001ms !important;
  }
  .js .reveal { opacity: 1; transform: none; }
}