/* ============================================================
   北京悠软科技发展有限公司 · 官网样式
   ============================================================ */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@400;500;600;700;800&display=swap');

/* ---------- 设计变量 ---------- */
:root {
  --bg: #f4f7fc;
  --bg-soft: #ffffff;
  --bg-alt: #eaf1fb;
  --surface: #ffffff;
  --surface-2: #eef3fb;
  --border: rgba(20, 35, 70, 0.1);
  --border-hover: rgba(124, 92, 255, 0.55);
  --text: #131c30;
  --text-soft: #4a5572;
  --text-dim: #8089a0;
  --brand: #7c3aed;
  --brand-2: #a855f7;
  --accent: #7c5cff;
  --grad: linear-gradient(135deg, #7c3aed 0%, #a855f7 100%);
  --grad-soft: linear-gradient(135deg, rgba(124, 92, 255, 0.14), rgba(192, 132, 252, 0.1));
  --radius: 18px;
  --radius-sm: 12px;
  --shadow: 0 18px 44px -22px rgba(76, 29, 149, 0.30);
  --shadow-card: 0 6px 22px -12px rgba(76, 29, 149, 0.18);
  --shadow-glow: 0 10px 30px -10px rgba(124, 58, 237, 0.45);
  --maxw: 1180px;
  --nav-h: 72px;
  --topbar-h: 38px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
  --font-display: "Outfit", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", system-ui, sans-serif;
}

/* ---------- 基础重置 ---------- */
* { margin: 0; padding: 0; box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: calc(var(--nav-h) + 10px); }

body {
  font-family: "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Helvetica,
    Arial, "Segoe UI", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* 细微颗粒质感叠加，打破纯平面 */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  opacity: 0.04;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}
@media (prefers-reduced-motion: reduce) {
  body::after { display: none; }
}

/* 细微噪点纹理，打破纯平面 */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 9000;
  pointer-events: none;
  opacity: 0.025;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='160' height='160'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
}

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

/* 显示字体与排版优化 */
h1, h2, h3, h4, h5,
.hero-title, .eyebrow, .num, .sol-num, .step-dot, .mc-badge {
  font-family: var(--font-display);
}
h1, h2, h3, .hero-title, .section-head h2 { text-wrap: balance; }
p, .hero-sub, .card p, .section-head p { text-wrap: pretty; }
.num, .stat, .cmp-metrics b, .as-item .num { font-variant-numeric: tabular-nums; }

/* 键盘可访问性：聚焦环 */
:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 3px;
  border-radius: 4px;
}
/* 跳到主内容 */
.skip-link {
  position: absolute;
  left: 16px;
  top: -48px;
  z-index: 2000;
  padding: 9px 16px;
  border-radius: 10px;
  background: var(--brand);
  color: #fff;
  font-size: 14px;
  transition: top 0.25s var(--ease);
}
.skip-link:focus { top: 8px; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

.container {
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: 999px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform 0.3s var(--ease), box-shadow 0.3s var(--ease),
    background 0.3s, border-color 0.3s;
  white-space: nowrap;
}
.btn-primary {
  background: var(--grad);
  color: #ffffff;
  box-shadow: var(--shadow-glow);
}
.btn-primary:hover {
  transform: translateY(-3px);
  box-shadow: 0 16px 36px -10px rgba(124, 58, 237, 0.6);
}
.btn-ghost {
  background: var(--surface);
  color: var(--text);
  border-color: var(--border);
  backdrop-filter: blur(8px);
}
.btn-ghost:hover {
  border-color: var(--border-hover);
  transform: translateY(-3px);
  background: var(--surface-2);
}
.btn:active { transform: translateY(0) scale(0.985); }
.btn-block { width: 100%; }

/* ---------- 顶部信息条 ---------- */
.topbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--topbar-h);
  z-index: 1001;
  display: flex;
  align-items: center;
  background: linear-gradient(90deg, rgba(124,92,255,0.16), rgba(192,132,252,0.12));
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px);
  font-size: 13px;
  transition: transform 0.4s var(--ease), opacity 0.4s;
}
.topbar-inner {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
}
.topbar-note { color: var(--text-soft); }
.topbar-links { display: flex; align-items: center; gap: 12px; color: var(--text-soft); }
.topbar-links a { transition: color 0.2s; }
.topbar-links a:hover { color: var(--brand-2); }
.topbar-links .sep { color: var(--text-dim); }
body.scrolled-down .topbar { transform: translateY(-100%); opacity: 0; }

/* ---------- 导航栏 ---------- */
.navbar {
  position: fixed;
  top: var(--topbar-h);
  left: 0;
  right: 0;
  height: var(--nav-h);
  z-index: 1000;
  display: flex;
  align-items: center;
  transition: background 0.4s, backdrop-filter 0.4s, border-color 0.4s, top 0.4s var(--ease);
  border-bottom: 1px solid transparent;
}
body.scrolled-down .navbar { top: 0; }
.navbar.scrolled {
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(18px) saturate(140%);
  border-bottom-color: var(--border);
  box-shadow: 0 6px 24px -18px rgba(20, 35, 70, 0.4);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.brand {
  display: flex;
  align-items: center;
  gap: 12px;
}
.brand-img {
  height: 42px;
  width: auto;
  display: block;
}
.footer-brand .brand-img { height: 40px; }
.brand-logo {
  display: grid;
  place-items: center;
  width: 44px;
  height: 44px;
  border-radius: 13px;
  background: var(--grad-soft);
  border: 1px solid var(--border);
}
.brand-text { display: flex; flex-direction: column; line-height: 1.1; }
.brand-text strong { font-size: 19px; letter-spacing: 0.5px; }
.brand-text em {
  font-style: normal;
  font-size: 10px;
  letter-spacing: 2px;
  color: var(--text-dim);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
}
.nav-links a {
  position: relative;
  padding: 8px 14px;
  font-size: 15px;
  color: var(--text-soft);
  border-radius: 10px;
  transition: color 0.25s, background 0.25s;
}
.nav-links a:not(.nav-cta)::after {
  content: "";
  position: absolute;
  left: 14px;
  right: 14px;
  bottom: 4px;
  height: 2px;
  background: var(--grad);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s var(--ease);
  border-radius: 2px;
}
.nav-links a:not(.nav-cta):hover,
.nav-links a.active { color: var(--text); }
.nav-links a:not(.nav-cta):hover::after,
.nav-links a.active::after { transform: scaleX(1); }
.nav-cta {
  background: var(--grad);
  color: #ffffff !important;
  font-weight: 600;
  padding: 9px 20px !important;
  box-shadow: var(--shadow-glow);
}
.nav-cta:hover { transform: translateY(-2px); }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 0;
  cursor: pointer;
  padding: 6px;
}
.nav-toggle span {
  width: 26px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: calc(var(--topbar-h) + var(--nav-h) + 50px) 0 70px;
  overflow: hidden;
  background:
    radial-gradient(ellipse 70% 60% at 75% 20%, rgba(192, 132, 252, 0.12), transparent 60%),
    radial-gradient(ellipse 60% 50% at 10% 80%, rgba(124, 92, 255, 0.12), transparent 60%),
    linear-gradient(180deg, #ffffff 0%, #eef3fb 100%);
}
.hero-bg { position: absolute; inset: 0; z-index: 0; }
.orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(70px);
  opacity: 0.28;
  animation: float 14s ease-in-out infinite;
}
.orb-1 {
  width: 460px; height: 460px;
  background: radial-gradient(circle, #7c5cff, transparent 70%);
  top: -120px; left: -80px;
}
.orb-2 {
  width: 420px; height: 420px;
  background: radial-gradient(circle, #c084fc, transparent 70%);
  bottom: -120px; right: -60px;
  animation-delay: -5s;
}
.orb-3 {
  width: 360px; height: 360px;
  background: radial-gradient(circle, #7c5cff, transparent 70%);
  top: 40%; left: 55%;
  animation-delay: -9s;
}
@keyframes float {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(40px, -30px) scale(1.08); }
  66% { transform: translate(-30px, 25px) scale(0.94); }
}
.grid-overlay {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(20, 35, 70, 0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(20, 35, 70, 0.045) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, #000 40%, transparent 100%);
}
.hero-inner {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 48px;
  align-items: center;
}
.hero-left { text-align: left; }
.hero-badge {
  display: inline-block;
  padding: 7px 18px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--border);
  font-size: 13px;
  color: var(--text-soft);
  letter-spacing: 0.5px;
  margin-bottom: 24px;
  backdrop-filter: blur(8px);
}
.hero-title {
  font-size: clamp(34px, 5vw, 60px);
  line-height: 1.14;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 22px;
}
.grad-text {
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  display: inline-block;
}
.hero-sub {
  max-width: 560px;
  margin: 0 0 32px;
  font-size: clamp(15px, 1.6vw, 18px);
  color: var(--text-soft);
}
.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 30px;
}
.hero-trust {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 8px 14px;
  color: var(--text-dim);
  font-size: 13px;
}
.hero-trust b {
  font-weight: 600;
  color: var(--text-soft);
  font-size: 13px;
  padding: 4px 10px;
  border-radius: 8px;
  background: var(--surface);
  border: 1px solid var(--border);
}

/* Hero 控制台视觉卡片 */
.hero-visual { position: relative; }
.dash-card {
  position: relative;
  border-radius: 20px;
  background: #ffffff;
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  overflow: hidden;
  animation: cardfloat 7s ease-in-out infinite;
}
@keyframes cardfloat {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-14px); }
}
.dash-head {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
  background: var(--surface-2);
}
.dash-head .dot { width: 11px; height: 11px; border-radius: 50%; }
.dot.r { background: #ff5f57; }
.dot.y { background: #febc2e; }
.dot.g { background: #28c840; }
.dash-title { margin-left: 8px; font-size: 13px; color: var(--text-soft); }
.dash-body { padding: 22px 20px; }
.dash-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 22px; }
.dash-metric { padding: 14px; border-radius: 12px; background: var(--surface); border: 1px solid var(--border); }
.dash-metric small { color: var(--text-dim); font-size: 12px; }
.dash-metric b { display: block; font-size: 24px; font-weight: 800; margin: 4px 0 10px; }
.dash-metric b.up { color: #34d399; }
.bar { height: 6px; border-radius: 4px; background: rgba(20,35,70,0.1); overflow: hidden; }
.bar i { display: block; height: 100%; background: var(--grad); border-radius: 4px; }
.dash-chart {
  display: flex;
  align-items: flex-end;
  gap: 9px;
  height: 110px;
  padding: 12px;
  border-radius: 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  margin-bottom: 18px;
}
.dash-chart span {
  flex: 1;
  border-radius: 5px 5px 0 0;
  background: var(--grad);
  opacity: 0.85;
  animation: barRise 1.2s var(--ease) backwards;
}
.dash-chart span:nth-child(1){animation-delay:.05s}
.dash-chart span:nth-child(2){animation-delay:.12s}
.dash-chart span:nth-child(3){animation-delay:.19s}
.dash-chart span:nth-child(4){animation-delay:.26s}
.dash-chart span:nth-child(5){animation-delay:.33s}
.dash-chart span:nth-child(6){animation-delay:.40s}
.dash-chart span:nth-child(7){animation-delay:.47s}
.dash-chart span:nth-child(8){animation-delay:.54s}
@keyframes barRise { from { height: 0 !important; opacity: 0; } }
.dash-tags { display: flex; flex-wrap: wrap; gap: 8px; }
.dash-tags span {
  font-size: 12px;
  padding: 5px 11px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-soft);
}
.float-chip {
  position: absolute;
  padding: 10px 16px;
  border-radius: 12px;
  background: #ffffff;
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 13px;
  font-weight: 600;
  box-shadow: var(--shadow);
  backdrop-filter: blur(8px);
}
.chip-1 { top: 18px; left: -26px; animation: cardfloat 6s ease-in-out infinite; }
.chip-2 { bottom: 30px; right: -22px; animation: cardfloat 6s ease-in-out infinite reverse; }

.hero-sub { max-width: 560px; }

.hero-stats {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin-top: 64px;
}
.stat {
  padding: 22px 12px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  backdrop-filter: blur(8px);
  transition: transform 0.3s var(--ease), border-color 0.3s;
}
.stat:hover { transform: translateY(-5px); border-color: var(--border-hover); }
.stat .num {
  display: block;
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 800;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.stat small { color: var(--text-dim); font-size: 13px; }

.scroll-hint {
  position: absolute;
  bottom: 26px;
  left: 50%;
  transform: translateX(-50%);
  width: 26px;
  height: 42px;
  border: 2px solid var(--border);
  border-radius: 14px;
  z-index: 1;
}
.scroll-hint span {
  position: absolute;
  top: 8px;
  left: 50%;
  width: 4px;
  height: 8px;
  margin-left: -2px;
  background: var(--brand-2);
  border-radius: 2px;
  animation: scrolldot 1.8s infinite;
}
@keyframes scrolldot {
  0% { opacity: 0; transform: translateY(0); }
  40% { opacity: 1; }
  80% { opacity: 0; transform: translateY(14px); }
  100% { opacity: 0; }
}

/* ---------- 通用区块 ---------- */
.section { padding: 100px 0; position: relative; }
.section-alt { background: var(--bg-alt); }
.section-head {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 56px;
}
.eyebrow {
  display: inline-block;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 3px;
  color: var(--brand-2);
  margin-bottom: 14px;
}
.section-head h2 {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 14px;
}
.section-head p { color: var(--text-soft); font-size: 16px; }

/* ---------- 核心业务卡片 ---------- */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}
.card {
  position: relative;
  padding: 30px 26px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: transform 0.4s var(--ease), border-color 0.4s, background 0.4s;
}
.card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--grad-soft);
  opacity: 0;
  transition: opacity 0.4s;
}
.card > * { position: relative; z-index: 1; }
.card:hover {
  transform: translateY(-8px);
  border-color: var(--border-hover);
}
.card:hover::before { opacity: 1; }
.card-icon {
  width: 56px;
  height: 56px;
  display: grid;
  place-items: center;
  font-size: 28px;
  border-radius: 14px;
  background: var(--grad-soft);
  border: 1px solid var(--border);
  margin-bottom: 18px;
}
.card h3 { font-size: 19px; margin-bottom: 10px; }
.card p { color: var(--text-soft); font-size: 14.5px; }

/* ---------- 云厂商 ---------- */
.partners-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.partner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
  padding: 32px 18px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  text-align: center;
  transition: transform 0.4s var(--ease), border-color 0.4s, box-shadow 0.4s;
}
.partner:hover {
  transform: translateY(-8px);
  border-color: color-mix(in srgb, var(--c) 60%, transparent);
  box-shadow: 0 18px 40px -18px color-mix(in srgb, var(--c) 70%, transparent);
}
.p-logo {
  width: 62px;
  height: 62px;
  display: grid;
  place-items: center;
  border-radius: 16px;
  font-size: 19px;
  font-weight: 800;
  color: #fff;
  background: color-mix(in srgb, var(--c) 85%, #000);
  box-shadow: 0 8px 22px -8px var(--c);
  margin-bottom: 8px;
}
.partner b { font-size: 16px; }
.partner small { color: var(--text-dim); font-size: 12px; letter-spacing: 0.5px; }
.partner-more .p-logo { font-size: 30px; }

/* ---------- 解决方案 ---------- */
.solutions-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 22px;
}
.solution {
  position: relative;
  padding: 34px 30px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: transform 0.4s var(--ease), border-color 0.4s;
}
.solution:hover { transform: translateY(-6px); border-color: var(--border-hover); }
.sol-num {
  font-size: 46px;
  font-weight: 800;
  line-height: 1;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  opacity: 0.85;
  margin-bottom: 14px;
}
.solution h3 { font-size: 21px; margin-bottom: 10px; }
.solution p { color: var(--text-soft); font-size: 15px; margin-bottom: 18px; }
.solution ul { display: flex; flex-wrap: wrap; gap: 10px; }
.solution ul li {
  font-size: 13px;
  padding: 5px 14px;
  border-radius: 999px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text-soft);
}

/* ---------- 为什么选择我们 ---------- */
.why-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}
.why-text .eyebrow { text-align: left; }
.why-text h2 {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 800;
  margin-bottom: 16px;
}
.why-text .lead { color: var(--text-soft); font-size: 17px; margin-bottom: 26px; }
.why-list { margin-bottom: 32px; }
.why-list li {
  position: relative;
  padding: 12px 0 12px 34px;
  color: var(--text-soft);
  border-bottom: 1px solid var(--border);
}
.why-list li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 12px;
  width: 22px;
  height: 22px;
  display: grid;
  place-items: center;
  font-size: 12px;
  font-weight: 800;
  color: #ffffff;
  background: var(--grad);
  border-radius: 50%;
}
.why-list li b { color: var(--text); margin-right: 6px; }

.why-visual {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}
.feature-card {
  padding: 28px 22px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  transition: transform 0.4s var(--ease), border-color 0.4s;
}
.feature-card:hover { transform: translateY(-6px); border-color: var(--border-hover); }
.feature-card.f2 { transform: translateY(24px); }
.feature-card.f2:hover { transform: translateY(18px); }
.feature-card.f4 { transform: translateY(24px); }
.feature-card.f4:hover { transform: translateY(18px); }
.fc-ico {
  width: 50px; height: 50px;
  display: grid; place-items: center;
  font-size: 24px;
  border-radius: 13px;
  background: var(--grad-soft);
  border: 1px solid var(--border);
  margin-bottom: 14px;
}
.feature-card h4 { font-size: 17px; margin-bottom: 6px; }
.feature-card p { color: var(--text-dim); font-size: 14px; }

/* ---------- 关于我们 ---------- */
.about-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 50px;
  align-items: center;
}
.about-text p { color: var(--text-soft); margin-bottom: 18px; font-size: 16px; }
.about-text strong { color: var(--text); }
.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
}
.as-item {
  text-align: center;
  padding: 30px 16px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  transition: transform 0.3s var(--ease), border-color 0.3s;
}
.as-item:hover { transform: translateY(-5px); border-color: var(--border-hover); }
.as-item .num {
  display: block;
  font-size: 40px;
  font-weight: 800;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.as-item small { color: var(--text-dim); }

/* ---------- 联系我们 CTA ---------- */
.cta-section { padding: 100px 0; }
.cta-box {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  padding: 50px;
  border-radius: 26px;
  background:
    radial-gradient(circle at 0% 0%, rgba(124, 92, 255, 0.18), transparent 50%),
    radial-gradient(circle at 100% 100%, rgba(192, 132, 252, 0.15), transparent 50%),
    var(--bg-soft);
  border: 1px solid var(--border);
  align-items: center;
}
.cta-left h2 {
  font-size: clamp(26px, 3.5vw, 36px);
  font-weight: 800;
  margin-bottom: 14px;
}
.cta-left > p { color: var(--text-soft); margin-bottom: 28px; }
.contact-list li {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 0;
  color: var(--text-soft);
}
.contact-list li span { font-size: 18px; }
.contact-list a { color: var(--text); transition: color 0.2s; }
.contact-list a:hover { color: var(--brand-2); }

/* ---------- 联系二维码 ---------- */
.qr-box {
  display: flex;
  align-items: center;
  gap: 18px;
  margin-top: 26px;
  padding: 16px 18px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  width: fit-content;
}
.qr-img {
  flex-shrink: 0;
  width: 104px;
  height: 104px;
  padding: 8px;
  border-radius: 12px;
  background: #fff;
}
.qr-img img { width: 100%; height: 100%; display: block; }
.qr-text b { display: block; font-size: 15px; margin-bottom: 6px; }
.qr-text small { color: var(--text-dim); font-size: 13px; }

.cta-form {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  display: grid;
  gap: 16px;
}
.field { display: flex; flex-direction: column; gap: 7px; }
.field label { font-size: 13.5px; color: var(--text-soft); }
.field input,
.field select,
.field textarea {
  width: 100%;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  background: #ffffff;
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 15px;
  font-family: inherit;
  transition: border-color 0.25s, box-shadow 0.25s;
}
.field textarea { resize: vertical; }
.field input::placeholder,
.field textarea::placeholder { color: var(--text-dim); }
.field input:focus,
.field select:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--brand);
  box-shadow: 0 0 0 3px rgba(124, 92, 255, 0.18);
}
.field select option { background: var(--bg-soft); color: var(--text); }
.form-tip { font-size: 13.5px; text-align: center; min-height: 18px; }
.form-tip.ok { color: #34d399; }
.form-tip.err { color: #f87171; }

/* ---------- 页脚 ---------- */
.footer {
  background: var(--bg-alt);
  border-top: 1px solid var(--border);
  padding-top: 56px;
}
.footer-inner {
  display: grid;
  grid-template-columns: 1.4fr 2fr;
  gap: 50px;
  padding-bottom: 44px;
}
.footer-brand strong { font-size: 18px; }
.footer-brand p { color: var(--text-dim); margin-top: 10px; font-size: 14px; }
.footer-cols {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}
.footer-cols h5 {
  font-size: 14px;
  margin-bottom: 16px;
  color: var(--text);
  letter-spacing: 0.5px;
}
.footer-cols a {
  display: block;
  color: var(--text-dim);
  font-size: 14px;
  padding: 6px 0;
  transition: color 0.2s, padding-left 0.2s;
}
.footer-cols a:hover { color: var(--brand-2); padding-left: 5px; }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 22px 0;
}
.footer-bottom .container {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  color: var(--text-dim);
  font-size: 13px;
}
.footer-bottom a { color: var(--text-dim); transition: color 0.2s; }
.footer-bottom a:hover { color: var(--brand); }

/* ---------- 返回顶部 ---------- */
.back-top {
  position: fixed;
  right: 26px;
  bottom: 26px;
  width: 46px;
  height: 46px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--grad);
  color: #ffffff;
  font-size: 20px;
  font-weight: 700;
  box-shadow: var(--shadow-glow);
  opacity: 0;
  visibility: hidden;
  transform: translateY(14px);
  transition: opacity 0.3s, transform 0.3s, visibility 0.3s;
  z-index: 900;
}
.back-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.back-top:hover { transform: translateY(-4px); }

/* ---------- 滚动揭示动画 ---------- */
.reveal {
  opacity: 0;
  transform: translateY(34px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}
.reveal.in { opacity: 1; transform: translateY(0); }

/* ---------- 合作云厂商滚动墙 ---------- */
.logos-strip {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  background: var(--bg-alt);
  padding: 26px 0;
  overflow: hidden;
  position: relative;
}
.logos-strip::before,
.logos-strip::after {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  width: 120px;
  z-index: 2;
  pointer-events: none;
}
.logos-strip::before { left: 0; background: linear-gradient(90deg, var(--bg-alt), transparent); }
.logos-strip::after { right: 0; background: linear-gradient(270deg, var(--bg-alt), transparent); }
.logos-track {
  display: flex;
  gap: 60px;
  width: max-content;
  animation: marquee 26s linear infinite;
}
.logos-track span {
  font-size: 19px;
  font-weight: 700;
  color: var(--text-dim);
  white-space: nowrap;
  letter-spacing: 0.5px;
  transition: color 0.3s;
}
.logos-strip:hover .logos-track { animation-play-state: paused; }
.logos-track span:hover { color: var(--brand-2); }
@keyframes marquee {
  from { transform: translateX(0); }
  to { transform: translateX(-50%); }
}

/* ---------- 卡片内标签 ---------- */
.card-list {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 16px;
}
.card-list li {
  font-size: 12px;
  padding: 4px 11px;
  border-radius: 999px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text-soft);
}

/* ---------- 云厂商能力切换 ---------- */
.vendor-tabs {
  margin-top: 48px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  overflow: hidden;
}
.vt-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  padding: 10px;
  border-bottom: 1px solid var(--border);
  background: var(--surface-2);
}
.vt-btn {
  flex: 1;
  min-width: 110px;
  padding: 11px 16px;
  border: 1px solid transparent;
  border-radius: 10px;
  background: transparent;
  color: var(--text-soft);
  font-size: 14.5px;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  transition: background 0.25s, color 0.25s, border-color 0.25s;
}
.vt-btn:hover { color: var(--text); }
.vt-btn.active {
  background: var(--grad-soft);
  color: var(--text);
  border-color: var(--border-hover);
}
.vt-panels { padding: 34px 34px 38px; }
.vt-panel { display: none; animation: fadeUp 0.5s var(--ease); }
.vt-panel.active { display: block; }
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: translateY(0); }
}
.vt-panel h3 { font-size: 22px; margin-bottom: 12px; }
.vt-panel > p { color: var(--text-soft); margin-bottom: 20px; max-width: 640px; }
.vt-panel ul { display: flex; flex-wrap: wrap; gap: 12px; }
.vt-panel ul li {
  font-size: 14px;
  padding: 9px 18px;
  border-radius: 12px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text);
}
.vt-model {
  margin-top: 20px;
  padding: 16px 18px;
  border-radius: 12px;
  background: var(--grad-soft);
  border: 1px solid var(--border-hover);
  font-size: 14px;
}
.vt-model > b { color: var(--brand-2); display: block; margin-bottom: 12px; }
.vt-models { display: flex; flex-wrap: wrap; gap: 9px; }
.vt-models span {
  font-size: 13px;
  padding: 7px 14px;
  border-radius: 999px;
  background: rgba(0,0,0,0.22);
  border: 1px solid var(--border);
  color: var(--text);
}

/* ---------- 服务流程 ---------- */
.process-line {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 18px;
  position: relative;
}
.process-line::before {
  content: "";
  position: absolute;
  top: 28px;
  left: 8%;
  right: 8%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--border-hover), transparent);
}
.step { text-align: center; position: relative; }
.step-dot {
  width: 56px;
  height: 56px;
  margin: 0 auto 18px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  font-size: 18px;
  font-weight: 800;
  color: #ffffff;
  background: var(--grad);
  box-shadow: var(--shadow-glow);
  position: relative;
  z-index: 1;
}
.step h4 { font-size: 17px; margin-bottom: 8px; }
.step p { color: var(--text-soft); font-size: 14px; padding: 0 6px; }

/* ---------- 客户案例 / 评价 ---------- */
.cases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
  margin-bottom: 44px;
}
.testimonial {
  position: relative;
  padding: 30px 28px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  transition: transform 0.4s var(--ease), border-color 0.4s;
}
.testimonial:hover { transform: translateY(-6px); border-color: var(--border-hover); }
.testimonial .quote {
  font-size: 60px;
  line-height: 0.6;
  font-weight: 800;
  color: var(--brand);
  opacity: 0.4;
  margin-bottom: 6px;
}
.testimonial blockquote {
  color: var(--text-soft);
  font-size: 15px;
  margin-bottom: 22px;
}
.testimonial figcaption {
  display: flex;
  align-items: center;
  gap: 12px;
  border-top: 1px solid var(--border);
  padding-top: 18px;
}
.avatar {
  width: 42px;
  height: 42px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  font-weight: 800;
  color: #fff;
  background: color-mix(in srgb, var(--c) 80%, #000);
}
.testimonial figcaption b { font-size: 15px; display: block; }
.testimonial figcaption small { color: var(--text-dim); font-size: 13px; }

.industries {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  justify-content: center;
  padding: 26px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
}
.industries span { color: var(--text-dim); font-size: 14px; }
.industries i {
  font-style: normal;
  font-size: 14px;
  padding: 7px 16px;
  border-radius: 999px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text-soft);
  transition: color 0.25s, border-color 0.25s;
}
.industries i:hover { color: var(--text); border-color: var(--border-hover); }

/* ---------- 关于我们价值观 ---------- */
.values {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
  margin-top: 26px;
}
.value {
  text-align: center;
  padding: 18px 10px;
  border-radius: var(--radius-sm);
  background: var(--surface);
  border: 1px solid var(--border);
}
.value b {
  display: block;
  font-size: 20px;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.value small { color: var(--text-dim); font-size: 13px; }

/* ---------- 常见问题 FAQ ---------- */
.faq-list {
  max-width: 820px;
  margin: 0 auto;
  display: grid;
  gap: 14px;
}
.faq-item {
  border-radius: var(--radius-sm);
  background: var(--surface);
  border: 1px solid var(--border);
  overflow: hidden;
  transition: border-color 0.3s;
}
.faq-item.open { border-color: var(--border-hover); }
.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 18px 22px;
  background: none;
  border: 0;
  cursor: pointer;
  font-family: inherit;
  font-size: 16px;
  font-weight: 600;
  color: var(--text);
  text-align: left;
}
.faq-ic {
  flex-shrink: 0;
  width: 26px;
  height: 26px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--grad-soft);
  border: 1px solid var(--border);
  font-size: 18px;
  transition: transform 0.3s var(--ease);
}
.faq-item.open .faq-ic { transform: rotate(45deg); }
.faq-a {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s var(--ease);
}
.faq-a p { padding: 0 22px 20px; color: var(--text-soft); font-size: 15px; }

/* ---------- 表单行 ---------- */
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

/* ---------- 页脚社交 ---------- */
.footer-brand .brand { margin-bottom: 16px; }
.footer-social { display: flex; gap: 10px; margin-top: 18px; }
.footer-social a {
  width: 38px;
  height: 38px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: var(--surface);
  border: 1px solid var(--border);
  font-size: 16px;
  transition: transform 0.25s, border-color 0.25s;
}
.footer-social a:hover { transform: translateY(-3px); border-color: var(--border-hover); }

/* ---------- 页脚联系信息 ---------- */
.footer-contact {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin: 18px 0 2px;
}
.footer-contact p {
  margin: 0;
  color: var(--text-soft);
  font-size: 14.5px;
  line-height: 1.4;
}
.footer-contact a { color: var(--text-soft); transition: color 0.2s; }
.footer-contact a[href^="tel"] { font-family: var(--font-mono); letter-spacing: 0.3px; }
.footer-contact a:hover { color: var(--brand); }
/* ---------- 页脚二维码（微信 + 飞书） ---------- */
/* ---------- 页脚二维码触发按钮（悬停弹出） ---------- */
.footer-social { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 22px; }
.qr-btn {
  display: inline-flex;
  align-items: center;
  padding: 9px 16px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-soft);
  font-size: 13.5px;
  font-weight: 600;
  cursor: pointer;
  transition: color 0.25s, border-color 0.25s, transform 0.25s;
}
.social-qr:hover .qr-btn { color: var(--brand); border-color: var(--border-hover); transform: translateY(-2px); }

/* ---------- 社交图标悬停二维码 ---------- */
.social-qr { position: relative; display: inline-flex; }
.qr-pop {
  position: absolute;
  bottom: calc(100% + 14px);
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  width: 150px;
  padding: 10px;
  background: #fff;
  border-radius: 14px;
  box-shadow: 0 16px 40px -10px rgba(0,0,0,0.6);
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.25s var(--ease), transform 0.25s var(--ease);
  z-index: 60;
  text-align: center;
}
.qr-pop::after {
  content: "";
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 8px solid transparent;
  border-top-color: #fff;
}
.qr-pop img { width: 100%; display: block; border-radius: 8px; }
.qr-pop small { display: block; margin-top: 7px; color: #0b1220; font-size: 12px; }
.social-qr:hover .qr-pop {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

/* 联系页：微信扫码触发按钮 */
.qr-trigger { margin-top: 26px; }
.qr-trigger-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 11px 20px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: border-color 0.25s, transform 0.25s;
}
.qr-trigger:hover .qr-trigger-btn { border-color: var(--border-hover); transform: translateY(-2px); }
.qr-tico { font-size: 18px; }

/* ---------- AI 大模型 API ---------- */
.ai-section { position: relative; overflow: hidden; }
.ai-bg { position: absolute; inset: 0; z-index: 0; pointer-events: none; }
.orb-ai {
  position: absolute;
  width: 520px; height: 520px;
  top: -160px; right: -120px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(124,92,255,0.35), transparent 70%);
  filter: blur(80px);
}
.ai-section .container { position: relative; z-index: 1; }

.card-ai {
  border-color: rgba(124, 92, 255, 0.35);
  background: linear-gradient(160deg, rgba(124,92,255,0.12), var(--surface));
}
.card-ai .card-icon {
  background: linear-gradient(135deg, rgba(124,92,255,0.3), rgba(192,132,252,0.2));
}

.ai-layout {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 36px;
  align-items: stretch;
}
.ai-features { display: flex; flex-direction: column; gap: 18px; }
.ai-feat {
  display: flex;
  gap: 16px;
  padding: 18px 20px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  transition: transform 0.35s var(--ease), border-color 0.35s;
}
.ai-feat:hover { transform: translateX(6px); border-color: var(--border-hover); }
.aif-ico {
  flex-shrink: 0;
  width: 46px; height: 46px;
  display: grid; place-items: center;
  font-size: 22px;
  border-radius: 12px;
  background: var(--grad-soft);
  border: 1px solid var(--border);
}
.ai-feat h4 { font-size: 16px; margin-bottom: 4px; }
.ai-feat p { color: var(--text-soft); font-size: 14px; }
.ai-features .btn { align-self: flex-start; margin-top: 4px; }

.ai-right { display: flex; flex-direction: column; gap: 22px; }
.model-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 14px;
}
.model {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 14px 16px;
  border-radius: 14px;
  background: var(--surface);
  border: 1px solid var(--border);
  transition: transform 0.35s var(--ease), border-color 0.35s, box-shadow 0.35s;
}
.model:hover {
  transform: translateY(-4px);
  border-color: color-mix(in srgb, var(--c) 55%, transparent);
  box-shadow: 0 14px 30px -16px color-mix(in srgb, var(--c) 75%, transparent);
}
.m-logo {
  flex-shrink: 0;
  width: 42px; height: 42px;
  display: grid; place-items: center;
  border-radius: 11px;
  font-size: 14px;
  font-weight: 800;
  color: #fff;
  background: color-mix(in srgb, var(--c) 85%, #000);
}
.model b { font-size: 15px; line-height: 1.2; }
.model small { display: block; color: var(--text-dim); font-size: 12px; }

.code-card {
  border-radius: var(--radius);
  background: #0a0e1a;
  border: 1px solid var(--border);
  overflow: hidden;
  box-shadow: var(--shadow);
}
.code-head {
  display: flex;
  align-items: center;
  gap: 7px;
  padding: 12px 16px;
  background: rgba(255,255,255,0.03);
  border-bottom: 1px solid var(--border);
}
.code-title { margin-left: 8px; font-size: 13px; color: var(--text-soft); }
.code-body {
  margin: 0;
  padding: 18px 20px;
  font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
  font-size: 13px;
  line-height: 1.75;
  color: #c9d3ea;
  overflow-x: auto;
}
.c-cm { color: #5b657f; }
.c-kw { color: #c084fc; }
.c-str { color: #34d399; }
.c-fn { color: #7c5cff; }
.c-num { color: #fbbf24; }

.ai-scenes {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 14px;
  margin-top: 36px;
}
.scene {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 20px 10px;
  border-radius: var(--radius-sm);
  background: var(--surface);
  border: 1px solid var(--border);
  font-size: 14px;
  color: var(--text-soft);
  transition: transform 0.3s var(--ease), border-color 0.3s;
}
.scene span { font-size: 24px; }
.scene:hover { transform: translateY(-5px); border-color: var(--border-hover); color: var(--text); }

/* ---------- 内页 Banner ---------- */
.page-hero {
  position: relative;
  padding: calc(var(--topbar-h) + var(--nav-h) + 72px) 0 56px;
  text-align: center;
  overflow: hidden;
  border-bottom: 1px solid var(--border);
}
.page-hero .hero-bg { position: absolute; inset: 0; z-index: 0; }
.page-hero .container { position: relative; z-index: 1; }
.page-hero .eyebrow { margin-bottom: 12px; }
.page-hero h1 {
  font-size: clamp(30px, 5vw, 50px);
  font-weight: 800;
  letter-spacing: -0.5px;
  margin-bottom: 16px;
}
.page-hero h1 .grad-text { display: inline; }
.page-hero p {
  max-width: 640px;
  margin: 0 auto;
  color: var(--text-soft);
  font-size: clamp(15px, 1.6vw, 18px);
}
.crumb {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  margin-top: 22px;
  font-size: 13px;
  color: var(--text-dim);
}
.crumb a { transition: color 0.2s; }
.crumb a:hover { color: var(--brand-2); }
.crumb span { color: var(--border-hover); }

/* 内页内容区首块去掉过大留白 */
.page-section { padding: 80px 0; }
.center-cta { text-align: center; margin-top: 44px; }

/* ---------- 底部通用 CTA 条 ---------- */
.cta-band {
  position: relative;
  text-align: center;
  padding: 70px 0;
  overflow: hidden;
  background:
    radial-gradient(circle at 20% 0%, rgba(124,92,255,0.16), transparent 55%),
    radial-gradient(circle at 80% 100%, rgba(192,132,252,0.14), transparent 55%),
    var(--bg-alt);
  border-top: 1px solid var(--border);
}
.cta-band h2 { font-size: clamp(24px, 3.5vw, 36px); font-weight: 800; margin-bottom: 12px; }
.cta-band p { color: var(--text-soft); margin-bottom: 26px; }
.cta-band .btn { margin: 0 6px; }

/* ---------- Hero 聊天预览 ---------- */
.chat-preview {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 14px;
  border-radius: 12px;
  background: var(--surface);
  border: 1px solid var(--border);
  margin-bottom: 18px;
}
.cp-msg {
  max-width: 85%;
  font-size: 12px;
  line-height: 1.5;
  padding: 8px 12px;
  border-radius: 12px;
}
.cp-in {
  align-self: flex-start;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border);
  border-bottom-left-radius: 3px;
}
.cp-out {
  align-self: flex-end;
  background: linear-gradient(135deg, rgba(124,92,255,0.28), rgba(192,132,252,0.2));
  border-bottom-right-radius: 3px;
}
.cp-ai {
  font-size: 11px;
  color: var(--text-soft);
  padding: 8px 12px;
  border-radius: 10px;
  background: rgba(124,92,255,0.12);
  border: 1px solid rgba(124,92,255,0.3);
}
.cp-ai b { display: block; color: var(--text); font-size: 11.5px; margin-bottom: 2px; }

/* ---------- 两大核心产品 ---------- */
.product-duo {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}
.product-trio {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 22px;
}
.product-card {
  position: relative;
  padding: 36px 32px;
  border-radius: 22px;
  background: linear-gradient(160deg, rgba(124,92,255,0.12), var(--surface));
  border: 1px solid var(--border);
  overflow: hidden;
  transition: transform 0.4s var(--ease), border-color 0.4s;
}
.product-card.product-kb {
  background: linear-gradient(160deg, rgba(124,92,255,0.14), var(--surface));
}
.product-card.product-agent {
  background: linear-gradient(160deg, rgba(192,132,252,0.14), var(--surface));
}
.product-card:hover { transform: translateY(-8px); border-color: var(--border-hover); }
.pc-icon {
  width: 60px; height: 60px;
  display: grid; place-items: center;
  font-size: 30px;
  border-radius: 16px;
  background: var(--grad-soft);
  border: 1px solid var(--border);
  margin-bottom: 18px;
}
.pc-tag {
  display: inline-block;
  font-size: 12px;
  color: var(--brand-2);
  letter-spacing: 1px;
  margin-bottom: 8px;
}
.product-card h3 { font-size: 24px; margin-bottom: 12px; }
.product-card > p { color: var(--text-soft); font-size: 15px; margin-bottom: 20px; }
.pc-list { margin-bottom: 26px; }
.pc-list li {
  position: relative;
  padding: 9px 0 9px 28px;
  color: var(--text-soft);
  font-size: 14.5px;
  border-bottom: 1px solid var(--border);
}
.pc-list li::before {
  content: "✓";
  position: absolute;
  left: 0; top: 9px;
  width: 18px; height: 18px;
  display: grid; place-items: center;
  font-size: 10px; font-weight: 800;
  color: #04122e;
  background: var(--grad);
  border-radius: 50%;
}

/* ---------- 更多服务条 ---------- */
.more-services {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 12px;
  justify-content: center;
  margin-top: 40px;
  padding: 22px 26px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px dashed var(--border-hover);
}
.more-services span { color: var(--text-soft); font-size: 14.5px; font-weight: 600; }
.more-services a {
  font-size: 13.5px;
  padding: 8px 16px;
  border-radius: 999px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text-soft);
  transition: color 0.25s, border-color 0.25s, transform 0.25s;
}
.more-services a:hover { color: var(--text); border-color: var(--border-hover); transform: translateY(-2px); }

/* ---------- 基础设施次要条 ---------- */
.infra-band {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 30px;
  flex-wrap: wrap;
  padding: 36px 40px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
}
.infra-text { flex: 1; min-width: 280px; }
.infra-text h3 { font-size: 22px; margin-bottom: 10px; }
.infra-text p { color: var(--text-soft); font-size: 15px; max-width: 640px; }
.infra-links { display: flex; flex-wrap: wrap; gap: 10px; }
.infra-links a {
  font-size: 14px;
  padding: 10px 18px;
  border-radius: 999px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text-soft);
  transition: color 0.25s, border-color 0.25s, transform 0.25s;
}
.infra-links a:hover { color: var(--text); border-color: var(--border-hover); transform: translateY(-2px); }

/* ---------- 平台功能全景图 ---------- */
.map-core {
  max-width: 760px;
  margin: 0 auto 32px;
  text-align: center;
  padding: 30px 32px;
  border-radius: var(--radius);
  background: var(--grad-soft);
  border: 1px solid var(--border-hover);
}
.mc-badge {
  display: inline-block;
  font-size: 18px;
  font-weight: 800;
  padding: 6px 18px;
  border-radius: 999px;
  background: var(--grad);
  color: #04122e;
  margin-bottom: 14px;
}
.map-core > p { color: var(--text-soft); font-size: 15px; margin-bottom: 18px; }
.mc-tags { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }
.mc-tags span {
  font-size: 13px;
  padding: 7px 15px;
  border-radius: 999px;
  background: rgba(0,0,0,0.2);
  border: 1px solid var(--border);
  color: var(--text);
}
.module-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.module-card {
  padding: 26px 24px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  transition: transform 0.4s var(--ease), border-color 0.4s;
}
.module-card:hover { transform: translateY(-6px); border-color: var(--border-hover); }
.mod-head { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; }
.mod-ico {
  width: 46px; height: 46px;
  display: grid; place-items: center;
  font-size: 22px;
  border-radius: 12px;
  background: var(--grad-soft);
  border: 1px solid var(--border);
}
.mod-head h3 { font-size: 16px; }
.mod-head small { color: var(--text-dim); font-size: 12px; }
.module-card ul { display: flex; flex-direction: column; gap: 9px; }
.module-card li {
  position: relative;
  padding-left: 20px;
  font-size: 13.5px;
  color: var(--text-soft);
}
.module-card li::before {
  content: "›";
  position: absolute;
  left: 4px; top: -1px;
  color: var(--brand-2);
  font-weight: 800;
}

/* ---------- 客服体验对比 ---------- */
.cmp { max-width: 1000px; margin: 0 auto; }
.cmp-tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  justify-content: center;
  margin-bottom: 28px;
}
.cmp-tab {
  padding: 11px 22px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: var(--surface);
  color: var(--text-soft);
  font-size: 14.5px;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: color 0.25s, background 0.25s, border-color 0.25s;
}
.cmp-tab:hover { color: var(--text); }
.cmp-tab.active {
  background: var(--grad);
  color: #04122e;
  border-color: transparent;
}
.cmp-panel { display: none; grid-template-columns: 1fr 1fr; gap: 22px; }
.cmp-panel.active { display: grid; animation: fadeUp 0.5s var(--ease); }
.cmp-col {
  padding: 24px 22px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
}
.cmp-col.is-before { border-color: rgba(248,113,113,0.35); }
.cmp-col.is-after { border-color: rgba(52,211,153,0.4); }
.cmp-label {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-bottom: 16px;
}
.cmp-label b { font-size: 15px; }
.cmp-pill {
  font-size: 12px;
  padding: 4px 12px;
  border-radius: 999px;
  font-weight: 600;
}
.cmp-pill.bad { background: rgba(248,113,113,0.15); color: #fca5a5; border: 1px solid rgba(248,113,113,0.4); }
.cmp-pill.good { background: rgba(52,211,153,0.15); color: #6ee7b7; border: 1px solid rgba(52,211,153,0.4); }
.cmp-chat { display: flex; flex-direction: column; gap: 8px; margin-bottom: 18px; }
.cb {
  font-size: 13px;
  line-height: 1.55;
  padding: 9px 13px;
  border-radius: 12px;
  max-width: 92%;
}
.cb i { font-style: normal; color: var(--text-dim); font-size: 11.5px; }
.cb.user {
  align-self: flex-end;
  background: rgba(255,255,255,0.06);
  border: 1px solid var(--border);
  border-bottom-right-radius: 3px;
}
.cb.agent {
  align-self: flex-start;
  background: rgba(248,113,113,0.1);
  border: 1px solid rgba(248,113,113,0.25);
  border-bottom-left-radius: 3px;
}
.cb.ai {
  align-self: flex-start;
  background: linear-gradient(135deg, rgba(124,92,255,0.2), rgba(192,132,252,0.14));
  border: 1px solid rgba(124,92,255,0.3);
  border-bottom-left-radius: 3px;
}
.cmp-metrics {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  border-top: 1px solid var(--border);
  padding-top: 16px;
}
.cmp-metrics div { text-align: center; }
.cmp-metrics span { display: block; font-size: 11.5px; color: var(--text-dim); margin-bottom: 4px; }
.cmp-metrics b { font-size: 15px; }
.is-before .cmp-metrics b { color: #fca5a5; }
.is-after .cmp-metrics b { color: #6ee7b7; }

/* ---------- AI Agent 角色卡 ---------- */
.role-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 16px;
}
.role-chip {
  text-align: center;
  padding: 26px 16px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  transition: transform 0.35s var(--ease), border-color 0.35s;
}
.role-chip:hover { transform: translateY(-6px); border-color: var(--border-hover); }
.role-chip span { font-size: 32px; display: block; margin-bottom: 12px; }
.role-chip b { font-size: 16px; display: block; margin-bottom: 4px; }
.role-chip small { color: var(--text-dim); font-size: 12.5px; }

/* ---------- 知识库：全链路架构 ---------- */
.arch-layers { display: flex; flex-direction: column; gap: 16px; }
.arch-layer {
  display: flex;
  align-items: flex-start;
  gap: 20px;
  padding: 24px 26px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-card);
  transition: transform 0.35s var(--ease), border-color 0.35s;
}
.arch-layer:hover { transform: translateX(6px); border-color: var(--border-hover); }
.al-tag {
  flex-shrink: 0;
  width: 104px;
  text-align: center;
  padding: 10px 0;
  border-radius: 12px;
  font-weight: 800;
  font-size: 15px;
  color: #fff;
  background: var(--grad);
}
.arch-layer b { display: block; font-size: 17px; margin-bottom: 6px; }
.arch-layer p { color: var(--text-soft); font-size: 14.5px; }

/* ---------- 知识库：应用场景双列 ---------- */
.scene-cols { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.scene-col {
  padding: 30px 28px;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-card);
}
.scene-col h3 {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 20px;
  margin-bottom: 18px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border);
}
.scene-col h3 span { font-size: 22px; }
.scene-col ul { display: grid; gap: 11px; }
.scene-col li {
  position: relative;
  padding-left: 24px;
  color: var(--text-soft);
  font-size: 14.5px;
}
.scene-col li::before {
  content: "✓";
  position: absolute;
  left: 0; top: 1px;
  width: 16px; height: 16px;
  display: grid; place-items: center;
  font-size: 9px; font-weight: 800;
  color: #fff;
  background: var(--grad);
  border-radius: 50%;
}

/* ---------- 知识库：竞品对比表 ---------- */
.kb-table-wrap { overflow-x: auto; border-radius: var(--radius); border: 1px solid var(--border); box-shadow: var(--shadow-card); }
.kb-table { width: 100%; border-collapse: collapse; min-width: 640px; background: var(--surface); }
.kb-table th, .kb-table td {
  padding: 16px 20px;
  text-align: left;
  border-bottom: 1px solid var(--border);
  font-size: 14.5px;
}
.kb-table thead th {
  background: var(--grad-soft);
  font-weight: 700;
  color: var(--text);
}
.kb-table thead th:last-child { color: var(--brand); }
.kb-table td:first-child { font-weight: 600; color: var(--text); width: 22%; }
.kb-table td:nth-child(2) { color: var(--text-dim); }
.kb-table td:last-child { color: var(--text); }
.kb-table tbody tr:last-child td { border-bottom: 0; }
.kb-table tbody tr:hover { background: rgba(124, 58, 237, 0.04); }

/* 知识库：双场景三列 */
.kb-trio { grid-template-columns: repeat(3, 1fr); }

/* ---------- 404 页 ---------- */
.notfound {
  position: relative;
  min-height: 100dvh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  padding: calc(var(--nav-h) + 60px) 0 80px;
}
.nf-inner { position: relative; z-index: 1; max-width: 640px; }
.nf-code {
  font-family: var(--font-display);
  font-size: clamp(96px, 22vw, 200px);
  font-weight: 800;
  line-height: 1;
  letter-spacing: -2px;
  background: var(--grad);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: 8px;
}
.notfound h1 { font-size: clamp(24px, 4vw, 38px); margin-bottom: 14px; }
.notfound p { color: var(--text-soft); margin: 0 auto 30px; max-width: 460px; }
.nf-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; margin-bottom: 36px; }
.nf-links { display: flex; flex-wrap: wrap; gap: 10px; justify-content: center; }
.nf-links a {
  font-size: 14px;
  padding: 8px 16px;
  border-radius: 999px;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--text-soft);
  transition: color 0.25s, border-color 0.25s, transform 0.25s;
}
.nf-links a:hover { color: var(--brand); border-color: var(--border-hover); transform: translateY(-2px); }

/* ---------- Hero 企业知识库动态控制台 ---------- */
.kb-console {
  position: relative;
  border-radius: var(--radius);
  background: var(--surface);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  padding-bottom: 20px;
  overflow: hidden;
}
.kbc-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  border-bottom: 1px solid var(--border);
  background: var(--grad-soft);
}
.kbc-title { font-family: var(--font-display); font-weight: 700; font-size: 14.5px; color: var(--text); }
.kbc-status { display: inline-flex; align-items: center; gap: 7px; font-size: 12px; color: var(--text-dim); }
.kbc-status::before { content: ""; width: 7px; height: 7px; border-radius: 50%; background: #16a34a; box-shadow: 0 0 0 3px rgba(22,163,74,0.15); }
.kbc-search {
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 18px 18px 0;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface-2);
  color: var(--text-dim);
}
.kbc-query { color: var(--text); font-size: 14.5px; white-space: pre; }
.kbc-caret { display: inline-block; width: 2px; height: 16px; background: var(--brand); margin-left: 1px; animation: kbcBlink 1s steps(1) infinite; }
.kbc-retrieve { margin: 16px 18px 0; opacity: 0; transition: opacity 0.4s var(--ease); }
.kbc-retrieve.show { opacity: 1; }
.kbc-label { font-size: 12px; color: var(--text-dim); }
.kbc-sources { display: flex; gap: 8px; margin-top: 9px; flex-wrap: wrap; }
.kbc-src {
  font-size: 12.5px;
  padding: 5px 12px;
  border-radius: 999px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text-soft);
  opacity: 0.35;
  transform: translateY(4px);
  transition: opacity 0.3s var(--ease), transform 0.3s var(--ease), border-color 0.3s, color 0.3s;
}
.kbc-src.on { opacity: 1; transform: none; border-color: var(--border-hover); color: var(--text); }
.kbc-answer {
  margin: 16px 18px 0;
  padding: 14px 16px;
  border-radius: 12px;
  background: var(--grad-soft);
  border: 1px solid var(--border);
  min-height: 70px;
}
.kbc-ans { font-size: 14px; line-height: 1.75; color: var(--text); }
@keyframes kbcBlink { 50% { opacity: 0; } }
@media (prefers-reduced-motion: reduce) {
  .kbc-caret { animation: none; }
}

/* ---------- 知识库：价值流程步进 + 编号价值行 ---------- */
.kb-steps {
  display: flex;
  flex-wrap: wrap;
  margin: 0 0 8px;
  padding: 0;
}
.kb-steps li {
  position: relative;
  flex: 1 1 0;
  min-width: 130px;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 12px;
  padding: 0 8px 36px;
}
.kb-steps li::before {
  content: "";
  position: absolute;
  top: 19px;
  left: 50%;
  right: -50%;
  height: 1px;
  background: var(--border);
  z-index: 0;
}
.kb-steps li:last-child::before { display: none; }
.ks-no {
  position: relative;
  z-index: 1;
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  background: var(--surface);
  border: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--brand);
}
.ks-label { font-family: var(--font-display); font-weight: 600; font-size: 16px; color: var(--text); }

.kv-list { display: flex; flex-direction: column; }
.kv-row {
  display: grid;
  grid-template-columns: 96px 1fr;
  gap: 32px;
  padding: 40px 0;
  border-top: 1px solid var(--border);
  align-items: start;
  transition: background 0.3s var(--ease);
}
.kv-list .kv-row:last-child { border-bottom: 1px solid var(--border); }
.kv-row:hover { background: var(--surface-2); }
.kv-no {
  font-family: var(--font-mono);
  font-size: 36px;
  font-weight: 500;
  color: var(--brand);
  line-height: 1;
}
.kv-body h3 {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.01em;
  margin-bottom: 20px;
}
.kv-points {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px 40px;
}
.kv-points b { display: block; font-size: 15px; color: var(--text); margin-bottom: 6px; }
.kv-points p { color: var(--text-soft); font-size: 14.5px; line-height: 1.72; }

/* 三大核心优势：单行三列 */
.adv-grid { grid-template-columns: repeat(3, 1fr); }

/* ---------- 核心业务场景（对内 / 对外） ---------- */
.scn-groups { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }
.scn-group {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
  padding: 6px 30px 14px;
}
.scn-gh {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 26px 0 6px;
}
.scn-tag {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.5px;
  padding: 4px 11px;
  border-radius: 6px;
  background: var(--grad-soft);
  color: var(--brand);
  border: 1px solid var(--border);
}
.scn-gh h3 { font-family: var(--font-display); font-size: 20px; font-weight: 700; letter-spacing: -0.01em; }
.scn-list li {
  padding: 20px 0;
  border-top: 1px solid var(--border);
}
.scn-list li h4 {
  position: relative;
  font-size: 16px;
  font-weight: 600;
  margin-bottom: 7px;
  padding-left: 16px;
}
.scn-list li h4::before {
  content: "";
  position: absolute;
  left: 0;
  top: 7px;
  width: 7px;
  height: 7px;
  background: var(--brand);
  border-radius: 2px;
}
.scn-list li p { color: var(--text-soft); font-size: 14.5px; line-height: 1.74; padding-left: 16px; }
.scn-kw { display: flex; flex-wrap: wrap; gap: 7px; margin-top: 11px; padding-left: 16px; }
.scn-kw span {
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 4px 10px;
  border-radius: 6px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  color: var(--text-soft);
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .cards-grid { grid-template-columns: repeat(2, 1fr); }
  .partners-grid { grid-template-columns: repeat(3, 1fr); }
  .hero-inner { grid-template-columns: 1fr; gap: 50px; }
  .hero-left { text-align: center; }
  .hero-sub { margin-left: auto; margin-right: auto; }
  .hero-actions, .hero-trust { justify-content: center; }
  .hero-visual { max-width: 460px; margin: 0 auto; width: 100%; }
  .process-line { grid-template-columns: repeat(3, 1fr); gap: 30px 18px; }
  .process-line::before { display: none; }
  .cases-grid { grid-template-columns: 1fr; }
  .ai-layout { grid-template-columns: 1fr; gap: 28px; }
  .ai-scenes { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 860px) {
  .nav-toggle { display: flex; }
  .topbar-note { display: none; }
  .topbar-inner { justify-content: center; }
  .nav-links {
    position: fixed;
    top: calc(var(--topbar-h) + var(--nav-h));
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    padding: 18px 24px 28px;
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(18px);
    border-bottom: 1px solid var(--border);
    box-shadow: 0 12px 30px -18px rgba(20, 35, 70, 0.4);
    transform: translateY(-150%);
    transition: transform 0.4s var(--ease), top 0.4s var(--ease);
  }
  body.scrolled-down .nav-links { top: var(--nav-h); }
  .nav-links.open { transform: translateY(0); }
  .nav-links a { padding: 13px 14px; font-size: 16px; }
  .nav-links a:not(.nav-cta)::after { display: none; }
  .nav-cta { text-align: center; margin-top: 6px; }

  .why-inner,
  .about-grid,
  .cta-box,
  .footer-inner { grid-template-columns: 1fr; gap: 36px; }
  .solutions-grid { grid-template-columns: 1fr; }
  .cta-box { padding: 32px 24px; }
  .footer-cols { grid-template-columns: repeat(2, 1fr); }
  .product-duo { grid-template-columns: 1fr; }
  .product-trio { grid-template-columns: 1fr; }
  .infra-band { flex-direction: column; align-items: flex-start; padding: 28px 24px; }
  .scene-cols { grid-template-columns: 1fr; }
  .arch-layer { flex-direction: column; gap: 12px; }
  .al-tag { width: auto; padding: 6px 16px; }
  .kb-trio { grid-template-columns: 1fr; }
  .module-grid { grid-template-columns: repeat(2, 1fr); }
  .cmp-panel.active { grid-template-columns: 1fr; }
  .role-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 640px) {
  .section { padding: 70px 0; }
  .hero-stats { grid-template-columns: repeat(2, 1fr); }
  .cards-grid { grid-template-columns: 1fr; }
  .partners-grid { grid-template-columns: repeat(2, 1fr); }
  .why-visual { grid-template-columns: 1fr 1fr; }
  .feature-card.f2,
  .feature-card.f4 { transform: none; }
  .feature-card.f2:hover,
  .feature-card.f4:hover { transform: translateY(-6px); }
  .footer-cols { grid-template-columns: 1fr 1fr; }
  .about-stats { grid-template-columns: 1fr 1fr; }
  .process-line { grid-template-columns: 1fr 1fr; }
  .field-row { grid-template-columns: 1fr; }
  .float-chip { display: none; }
  .vt-panels { padding: 24px 20px 28px; }
  .model-grid { grid-template-columns: repeat(2, 1fr); }
  .ai-scenes { grid-template-columns: repeat(2, 1fr); }
  .module-grid { grid-template-columns: 1fr; }
  .role-grid { grid-template-columns: repeat(2, 1fr); }
  .kv-points { grid-template-columns: 1fr; }
  .kv-row { grid-template-columns: 1fr; gap: 10px; padding: 30px 0; }
  .kv-no { font-size: 28px; }
  .kb-steps li { flex-basis: 50%; }
  .scn-groups { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  * { animation: none !important; transition: none !important; }
  .reveal { opacity: 1; transform: none; }
}

/* ---------- 浅色主题：卡片立体感 ---------- */
.card,
.partner,
.solution,
.feature-card,
.stat,
.as-item,
.testimonial,
.model,
.ai-feat,
.scene,
.value,
.vendor-tabs,
.faq-item,
.cta-form,
.industries,
.dash-metric {
  box-shadow: var(--shadow-card);
}
.dash-metric { box-shadow: none; }

/* 业务卡片悬停时阴影增强 */
.card:hover,
.partner:hover,
.solution:hover,
.feature-card:hover,
.testimonial:hover,
.model:hover,
.scene:hover {
  box-shadow: 0 18px 40px -18px rgba(20, 35, 70, 0.32);
}

/* 渐变文字在浅色下加深以保证可读性 */
.stat .num,
.as-item .num,
.value b,
.sol-num {
  filter: saturate(1.05);
}