/* 引入 Montserrat（品牌 Logo 字体） */
@import url('https://fonts.googleapis.com/css2?family=Montserrat:wght@500;800&display=swap');

/* ===================================================
   AirSky 朗臻 · 官网样式表（v2 全面优化版）
   优化要点：
   1. 导航项过多溢出 → 精简间距 + 更小字号 + 可折叠
   2. eyebrow 颜色在白底不可见（#bcecff）→ 改为深色
   3. h2 字号过大导致断行丑陋 → clamp 精调
   4. orbit 图在移动端错位 → 完全重写定位
   5. ticker JS 克隆后 2 倍速问题 → 改用 CSS repeat
   6. 联系表单 button type=button + onclick 混用 → 统一事件
   7. 卡片等高对齐问题 → flexbox column stretch
   8. 响应式断点过少（960/620）→ 补充 1200 / 480
   9. section-head flex + 小屏换行撑破容器 → grid fallback
   10. 打印样式 hero 背景残留白字不可读 → 修正
   =================================================== */

/* ---------- CSS 变量 ---------- */
:root {
  --ink: #102033;
  --muted: #5e7085;
  --line: #dce5ee;
  --paper: #f6f9fc;
  --white: #ffffff;
  --blue: #0f68b8;
  --deep: #073763;
  --cyan: #18a8c7;
  --green: #4ca56a;
  --gold: #d79a2b;
  --shadow: 0 18px 45px rgba(12, 39, 71, 0.12);
  --shadow-hover: 0 24px 56px rgba(12, 39, 71, 0.18);
  --radius: 10px;
  --transition: 0.22s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---------- 全局重置 ---------- */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  color: var(--ink);
  font-family: "PingFang SC", "HarmonyOS Sans SC", "Microsoft YaHei UI",
               "Microsoft YaHei", "Segoe UI", Arial, sans-serif;
  line-height: 1.65;
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

/* FIX #6: 键盘焦点可见 */
:focus-visible {
  outline: 3px solid var(--blue);
  outline-offset: 3px;
  border-radius: 4px;
}

img {
  display: block;
  max-width: 100%;
  height: auto;
}

/* ---------- 布局容器 ---------- */
.container {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
}

/* ---------- 导航 ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  border-bottom: 1px solid rgba(220, 229, 238, 0.8);
  background: rgba(255, 255, 255, 0.97);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: box-shadow var(--transition);
}

.site-header.scrolled {
  box-shadow: 0 2px 20px rgba(12, 39, 71, 0.08);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px; /* FIX #1: 略微压缩高度 */
  gap: 16px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 160px;
  flex-shrink: 0; /* FIX #1: 防止 Logo 被压缩 */
  transition: opacity var(--transition);
}

.brand:hover { opacity: 0.82; }

.brand-logo {
  display: inline-flex;
  align-items: baseline;
  gap: 2px;
  font-family: "Montserrat", "Arial Black", Arial, sans-serif;
  font-size: 28px; /* FIX #1: 略减小 */
  font-weight: 800;
  line-height: 1;
  letter-spacing: -0.5px;
}

.brand-logo .air { color: #ff2aa1; }
.brand-logo .sky { color: #2f6fd3; font-weight: 500; }

.brand .tagline {
  display: block;
  color: var(--muted);
  font-size: 11px;
  line-height: 1.3;
  margin-top: 2px;
}

/* FIX #1: 汉堡菜单 */
.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  color: var(--ink);
  font-size: 18px;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition);
  flex-shrink: 0;
}

.nav-toggle:hover {
  background: var(--paper);
  border-color: #b9cfe1;
}

.nav-links {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 1px; /* FIX #1: 缩小间距防溢出 */
  list-style: none;
  margin: 0;
  padding: 0;
  flex-wrap: nowrap;
}

.nav-links a {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  padding: 0 10px; /* FIX #1: 更紧凑 padding */
  border-radius: 8px;
  color: #2a3f54;
  font-size: 13.5px; /* FIX #1: 略减小字号 */
  font-weight: 500;
  transition: color var(--transition), background var(--transition);
  white-space: nowrap;
}

.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--blue);
  background: #eaf4fb;
}

.nav-links a[aria-current="page"] {
  font-weight: 700;
}

/* ---------- 按钮 ---------- */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  padding: 0 22px;
  border: 1.5px solid transparent;
  border-radius: var(--radius);
  font-size: 15px;
  font-weight: 700;
  white-space: nowrap;
  cursor: pointer;
  transition: background var(--transition), box-shadow var(--transition),
              transform var(--transition), border-color var(--transition),
              color var(--transition);
  -webkit-user-select: none;
  user-select: none;
}

.button:active { transform: translateY(1px); }

.button.primary {
  color: var(--white);
  background: var(--blue);
  box-shadow: 0 8px 24px rgba(15, 104, 184, 0.28);
}

.button.primary:hover {
  background: #0e5fa8;
  box-shadow: 0 12px 32px rgba(15, 104, 184, 0.38);
  transform: translateY(-1px);
}

.button.secondary {
  color: var(--deep);
  border-color: #b9cfe1;
  background: rgba(255, 255, 255, 0.9);
}

.button.secondary:hover {
  background: var(--paper);
  border-color: var(--blue);
  color: var(--blue);
  transform: translateY(-1px);
}
.button.ghost {
  color: var(--white);
  border-color: rgba(255,255,255,0.45);
  background: rgba(255,255,255,0.09);
}

.button.ghost:hover {
  background: rgba(255,255,255,0.18);
  border-color: rgba(255,255,255,0.75);
  transform: translateY(-1px);
}

.button:disabled,
.button[disabled] {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
  pointer-events: none;
}


/* ---------- Hero ---------- */
.hero {
  position: relative;
  overflow: hidden;
  min-height: 650px;
  color: var(--white);
  background:
    linear-gradient(90deg, rgba(5, 25, 47, 0.92) 0%, rgba(5, 35, 65, 0.75) 46%, rgba(9, 66, 105, 0.24) 100%),
    linear-gradient(160deg, #05192f 0%, #073763 45%, #0a5080 80%, #0c6494 100%);
}

.home-hero {
  min-height: 720px;
  background:
    radial-gradient(circle at 78% 20%, rgba(47, 111, 211, 0.32), transparent 34%),
    radial-gradient(circle at 12% 74%, rgba(255, 42, 161, 0.13), transparent 28%),
    linear-gradient(90deg, rgba(5, 11, 26, 0.96) 0%, rgba(7, 29, 51, 0.88) 48%, rgba(7, 55, 99, 0.68) 100%),
    linear-gradient(160deg, #050f1e 0%, #071d38 40%, #0b3870 75%, #0f5a9a 100%);
}

.hero-grid-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
  background-image:
    linear-gradient(rgba(188, 236, 255, 0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(188, 236, 255, 0.06) 1px, transparent 1px);
  background-size: 72px 72px;
  mask-image: radial-gradient(ellipse 82% 74% at 50% 45%, #000 18%, transparent 100%);
  -webkit-mask-image: radial-gradient(ellipse 82% 74% at 50% 45%, #000 18%, transparent 100%);
}

.hero.compact { min-height: 430px; }

.hero .container {
  position: relative;
  z-index: 1;
  display: grid;
  align-items: center;
  min-height: inherit;
  padding: 86px 0;
}

.hero-copy {
  max-width: 760px;
  animation: heroFadeUp 0.75s cubic-bezier(0.22, 1, 0.36, 1) both;
}

@keyframes heroFadeUp {
  from { opacity: 0; transform: translateY(28px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ---------- 排版 ---------- */
/* FIX #2: eyebrow 在白色背景下改为深色可读颜色 */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 16px;
  color: var(--blue); /* FIX: 原 #bcecff 在白底不可见 */
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

.eyebrow::before {
  content: "";
  width: 28px;
  height: 2px;
  background: var(--cyan);
  border-radius: 2px;
  flex-shrink: 0;
}

/* Hero 及深色背景下 eyebrow 用浅色 */
.hero .eyebrow,
.ai-core-section .eyebrow {
  color: #bcecff;
}

.hero .eyebrow::before,
.ai-core-section .eyebrow::before {
  background: #bcecff;
}

h1, h2, h3 {
  margin: 0;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

/* FIX #3: 调整 h2 最大字号防止断字 */
h1 { font-size: clamp(36px, 5vw, 62px); }
h2 { font-size: clamp(26px, 3.5vw, 38px); }
h3 { font-size: 20px; font-weight: 700; }

p { margin: 0; }

.hero-lead {
  max-width: 680px;
  margin-top: 20px;
  color: rgba(220, 232, 244, 0.92);
  font-size: 18px;
  line-height: 1.72;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  margin-top: 36px;
}

/* ---------- 数据指标 ---------- */
.hero-metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  max-width: 900px;
  margin-top: 60px;
}

.metric {
  padding: 20px 22px;
  border: 1px solid rgba(255, 255, 255, 0.18);
  border-radius: var(--radius);
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: background var(--transition), border-color var(--transition),
              transform var(--transition);
}

.metric:hover {
  background: rgba(255, 255, 255, 0.14);
  border-color: rgba(255, 255, 255, 0.32);
  transform: translateY(-2px);
}

.metric strong {
  display: block;
  font-size: 30px;
  line-height: 1.1;
  font-weight: 800;
}

.metric span {
  display: block;
  margin-top: 8px;
  color: rgba(215, 230, 242, 0.85);
  font-size: 12.5px;
}

/* ---------- 跑马灯 FIX #5: 纯 CSS 实现避免 JS 克隆速度问题 ---------- */
.home-ticker {
  overflow: hidden;
  padding: 13px 0;
  color: #ffffff;
  background: var(--blue);
  display: flex;
}

.ticker-track {
  display: flex;
  flex-shrink: 0;
  min-width: 100%;
  animation: tickerMove 36s linear infinite;
}

.ticker-track:nth-child(2) {
  animation-delay: -18s; /* 错开半个周期，实现无缝衔接 */
}

.home-ticker:hover .ticker-track {
  animation-play-state: paused;
}

.ticker-track span {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  padding: 0 30px;
  white-space: nowrap;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
}

.ticker-track span::after {
  content: "";
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.4);
  flex-shrink: 0;
}

@keyframes tickerMove {
  from { transform: translateX(0); }
  to   { transform: translateX(-100%); }
}

/* ---------- 锚点滚动偏移（补偿粘性导航高度 68px + 余量）---------- */
[id] {
  scroll-margin-top: 84px;
}

/* ---------- 通用 Section ---------- */
.section { padding: 90px 0; }
.section.alt { background: var(--paper); }

/* FIX #9: section-head 在小屏不溢出 */
.section-head {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 32px;
  margin-bottom: 40px;
  flex-wrap: wrap; /* FIX: 允许折行 */
}

.section-head > div { flex: 1 1 280px; }

.section-head p {
  flex: 1 1 300px;
  max-width: 520px;
  color: var(--muted);
  font-size: 15.5px;
  line-height: 1.72;
  align-self: flex-end;
}

/* ---------- 网格 ---------- */
.grid { display: grid; gap: 22px; }
.grid.two   { grid-template-columns: repeat(2, 1fr); }
.grid.three { grid-template-columns: repeat(3, 1fr); }
.grid.four  { grid-template-columns: repeat(4, 1fr); }

/* ---------- 卡片 FIX #7: 等高对齐 ---------- */
.grid > article.card,
.grid > .card {
  height: 100%; /* FIX: 保证同排等高 */
}

.card {
  display: flex;          /* FIX #7: flex column 让内容撑满 */
  flex-direction: column;
  padding: 30px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  transition: box-shadow var(--transition), transform var(--transition),
              border-color var(--transition);
}

.card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-3px);
  border-color: rgba(15, 104, 184, 0.15);
}

.card.emphasis {
  border-color: rgba(15, 104, 184, 0.22);
  box-shadow: var(--shadow);
}

.card.emphasis:hover {
  box-shadow: var(--shadow-hover);
  border-color: rgba(15, 104, 184, 0.36);
}

.card h3 { margin-bottom: 12px; }

.card p,
.card li {
  color: var(--muted);
  font-size: 15px;
  line-height: 1.7;
}

/* ---------- 图标 ---------- */
.icon {
  display: grid;
  width: 46px;
  height: 46px;
  margin-bottom: 20px;
  place-items: center;
  color: var(--white);
  font-weight: 800;
  border-radius: 10px;
  background: var(--blue);
  font-size: 14px;
  letter-spacing: 0;
  flex-shrink: 0; /* FIX: 不压缩 */
}

.icon.green { background: var(--green); }
.icon.gold  { background: var(--gold); }
.icon.cyan  { background: var(--cyan); }

/* ---------- 列表 ---------- */
.list {
  display: grid;
  gap: 10px;
  margin: 16px 0 0;
  padding: 0;
  list-style: none;
}

.list li {
  position: relative;
  padding-left: 22px;
  color: var(--muted);
  font-size: 14.5px;
  line-height: 1.65;
}

.list li::before {
  content: "";
  position: absolute;
  top: 0.72em;
  left: 0;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--cyan);
}

/* ---------- 生态图 FIX #4 ---------- */
.ecosystem {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 40px;
  align-items: center;
}

.orbit {
  position: relative;
  min-height: 420px;
  border-radius: var(--radius);
}

.orbit::before,
.orbit::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 1.5px dashed rgba(15, 104, 184, 0.2);
  /* 使轨道圆居中 */
  top: 50%; left: 50%;
  width: 330px; height: 330px;
  margin: -165px 0 0 -165px;
  animation: orbitSpin 30s linear infinite;
}

.orbit::after {
  width: 220px; height: 220px;
  margin: -110px 0 0 -110px;
  border-color: rgba(24, 168, 199, 0.18);
  animation-direction: reverse;
  animation-duration: 22s;
}

@keyframes orbitSpin {
  to { transform: rotate(360deg); }
}

.orbit-node,
.orbit-core {
  position: absolute;
  display: grid;
  place-items: center;
  border-radius: 50%;
  font-weight: 800;
  font-size: 14px;
  text-align: center;
  line-height: 1.3;
  transition: transform var(--transition), box-shadow var(--transition);
}

.orbit-core {
  width: 128px;
  height: 128px;
  top: 50%; left: 50%;
  transform: translate(-50%, -50%);
  background: linear-gradient(135deg, var(--blue), var(--deep));
  color: #fff;
  font-size: 15px;
  box-shadow: 0 16px 40px rgba(15, 104, 184, 0.38);
  z-index: 2;
}

.orbit-node {
  width: 104px;
  height: 104px;
  color: #fff;
  z-index: 1;
}

.orbit-node:hover { transform: scale(1.08); box-shadow: var(--shadow); }

/* FIX #4: 绝对定位改为相对轨道圆心的角度布局 */
.orbit-node.ticket {
  /* BPS — 正上方 (270°) */
  background: linear-gradient(135deg, #0f68b8, #18a8c7);
  top: calc(50% - 165px - 52px);
  left: calc(50% - 52px);
  transform: none;
}

.orbit-node.travel {
  /* 卓立 GO — 左下 (210°) */
  background: linear-gradient(135deg, #4ca56a, #3d8f5b);
  top: calc(50% - 82px - 52px);
  left: calc(50% - 143px - 52px);
  transform: none;
}

.orbit-node.benefit {
  /* AI — 右下 (330°) */
  background: linear-gradient(135deg, #d79a2b, #b8811f);
  top: calc(50% - 82px - 52px);
  left: calc(50% + 143px - 52px);
  transform: none;
}

/* ---------- 里程碑时间轴 ---------- */
.timeline {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0;
  max-width: 760px;
  margin: 0 auto;
}

/* 垂直连接线：贯穿所有节点 */
.timeline::before {
  content: "";
  position: absolute;
  top: 20px;
  bottom: 20px;
  left: 88px;
  width: 2px;
  background: linear-gradient(to bottom, var(--blue) 0%, var(--cyan) 100%);
}

.timeline-item {
  display: grid;
  grid-template-columns: 80px 1fr;
  align-items: flex-start;
  gap: 0 28px;
  padding: 0 0 32px;
  position: relative;
}

.timeline-item:last-child {
  padding-bottom: 0;
}

/* 年份标签：左侧固定宽度 */
.timeline-year {
  font-size: 20px;
  font-weight: 800;
  color: var(--blue);
  line-height: 1;
  padding-top: 2px;
  text-align: right;
}

/* 圆点节点：中轴上 */
.timeline-item::before {
  content: "";
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--white);
  border: 3px solid var(--blue);
  position: absolute;
  left: 82px;
  top: 4px;
  z-index: 1;
  box-shadow: 0 0 0 3px rgba(15, 104, 184, 0.15);
  transition: background var(--transition), border-color var(--transition);
}

.timeline-item:hover::before {
  background: var(--blue);
}

/* 内容卡片：右侧 */
.timeline-body {
  margin-left: 28px;
  padding: 16px 20px;
  border-radius: var(--radius);
  background: var(--white);
  border: 1px solid var(--line);
  text-align: left;
  transition: box-shadow var(--transition), transform var(--transition);
  line-height: 1.65;
}

.timeline-body:hover {
  box-shadow: var(--shadow);
  transform: translateX(3px);
}

/* ---------- 深色 band ---------- */
.band {
  color: var(--white);
  background: linear-gradient(135deg, var(--deep), #0b3878);
}

.band h2,
.band h3 { color: var(--white); }

.band .section-head p,
.band p { color: rgba(200, 220, 240, 0.85); }

.band .card {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.12);
  color: var(--white);
}

.band .card:hover {
  background: rgba(255, 255, 255, 0.14);
  border-color: rgba(255, 255, 255, 0.22);
  transform: translateY(-3px);
}

.band .card h3 { color: var(--white); }
.band .card p  { color: rgba(200, 220, 240, 0.8); }

/* ---------- 通用 CTA Band ---------- */
.cta-band {
  background: linear-gradient(135deg, #071e38 0%, #0b3260 100%);
  padding: 80px 0;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.cta-band::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 55% 70% at 80% 50%, rgba(24,168,199,0.10) 0%, transparent 70%),
    radial-gradient(ellipse 40% 50% at 15% 60%, rgba(15,104,184,0.14) 0%, transparent 60%);
  pointer-events: none;
}

.cta-band .container { position: relative; z-index: 1; }

.cta-band .eyebrow { color: #63d4f2; justify-content: center; }
.cta-band .eyebrow::before { background: #63d4f2; }

.cta-band h2 {
  color: var(--white);
  font-size: clamp(24px, 3.5vw, 36px);
  margin: 12px 0 14px;
}

.cta-band p {
  color: rgba(255,255,255,0.65);
  font-size: 16px;
  max-width: 500px;
  margin: 0 auto 36px;
  line-height: 1.7;
}

.cta-band .button.primary {
  background: #63d4f2;
  color: #071e38;
  font-weight: 700;
  border-color: #63d4f2;
}

.cta-band .button.primary:hover {
  background: #40c8ed;
  border-color: #40c8ed;
}

.cta-band .button.ghost {
  border-color: rgba(255,255,255,0.35);
  color: var(--white);
}

.cta-band .button.ghost:hover {
  border-color: rgba(255,255,255,0.7);
  background: rgba(255,255,255,0.07);
}

/* ---------- 特性表格 ---------- */
.feature-table {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.feature-row {
  display: grid;
  grid-template-columns: 200px 1fr; /* FIX: 固定左列宽避免文本溢出 */
  gap: 24px;
  padding: 20px 28px;
  border-top: 1px solid var(--line);
  transition: background var(--transition);
}

.feature-row:first-child { border-top: 0; }
.feature-row:hover { background: #f8fbff; }

.feature-row strong,
.feature-row span {
  font-size: 15px;
  line-height: 1.65;
}

.feature-row strong {
  color: var(--deep);
  font-weight: 700;
  align-self: start;
}

.feature-row span {
  color: var(--muted);
}

/* ---------- 优势布局 ---------- */
.advantage-layout {
  display: grid;
  grid-template-columns: 0.95fr 1.25fr;
  gap: 28px;
  align-items: stretch;
}

.cert-panel {
  padding: 34px;
  border: 1px solid rgba(15, 104, 184, 0.22);
  border-radius: var(--radius);
  background: var(--white);
  box-shadow: var(--shadow);
}

.cert-badge {
  display: inline-flex;
  align-items: center;
  min-height: 36px;
  margin-bottom: 18px;
  padding: 0 14px;
  border-radius: 999px;
  color: var(--deep);
  background: #eaf4fb;
  font-weight: 700;
  font-size: 13px;
}

/* ---------- API 优势图 ---------- */
.api-advantage {
  position: relative;
  display: grid;
  min-height: 420px;
  place-items: center;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background:
    radial-gradient(circle at center, rgba(247, 128, 38, 0.1), transparent 30%),
    var(--white);
  overflow: hidden;
}

.api-advantage::before {
  content: "";
  position: absolute;
  width: 300px;
  height: 300px;
  border: 14px solid rgba(16, 32, 51, 0.09);
  border-radius: 50%;
}

.api-core {
  position: relative;
  display: grid;
  width: 154px;
  height: 154px;
  place-items: center;
  border-radius: 50%;
  color: #111827;
  background: #f57c24;
  font-size: 24px;
  font-weight: 900;
  text-align: center;
  line-height: 1.28;
  box-shadow: 0 12px 30px rgba(245, 124, 36, 0.28);
}

.api-point {
  position: absolute;
  display: grid;
  width: 116px;
  height: 116px;
  place-items: center;
  padding: 14px;
  border-radius: 50%;
  color: #ffffff;
  background: #4d4d52;
  text-align: center;
  font-weight: 700;
  font-size: 13.5px;
  line-height: 1.3;
  box-shadow: 0 10px 24px rgba(16, 32, 51, 0.18);
  transition: transform var(--transition), background var(--transition);
}

.api-point.top    { top: 38px;    left: 50%; --tx: -50%; --ty: 0%;   transform: translate(var(--tx), var(--ty)); }
.api-point.right  { right: 44px;  top: 50%;  --tx: 0%;   --ty: -50%; transform: translate(var(--tx), var(--ty)); }
.api-point.bottom { bottom: 38px; left: 50%; --tx: -50%; --ty: 0%;   transform: translate(var(--tx), var(--ty)); }
.api-point.left   { left: 44px;   top: 50%;  --tx: 0%;   --ty: -50%; transform: translate(var(--tx), var(--ty)); }

.api-point:hover { background: #3a3a40; transform: translate(var(--tx), var(--ty)) scale(1.06); }

.api-note {
  position: absolute;
  max-width: 168px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

.api-note.n1 { top: 62px;    right: 28px; }
.api-note.n2 { right: 24px;  bottom: 86px; }
.api-note.n3 { bottom: 72px; left: 26px; }
.api-note.n4 { top: 144px;   left: 24px; }

/* ---------- 案例与合作 ---------- */
.case-logo {
  display: inline-flex;
  align-items: center;
  min-height: 32px;
  margin-bottom: 14px;
  padding: 0 12px;
  border-radius: 8px;
  color: var(--deep);
  background: #eaf4fb;
  font-weight: 700;
  font-size: 13px;
}

.media-card {
  overflow: hidden;
  padding: 0;
}

.media-card img {
  width: 100%;
  aspect-ratio: 4 / 3;
  object-fit: cover;
  background: #eef5fa;
  transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.media-card:hover img { transform: scale(1.03); }

.media-card.portrait img {
  aspect-ratio: 3 / 4;
}

.media-card.case-portrait img {
  aspect-ratio: 9 / 16;
  max-height: 520px;
}

/* ---------- 情景卡 ---------- */
.scenario-card {
  position: relative;
  overflow: hidden;
  padding: 32px 28px;
  border-radius: var(--radius);
  background: var(--white);
  border: 1px solid var(--line);
  transition: box-shadow var(--transition), transform var(--transition);
}

.scenario-card::before {
  content: "";
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 4px;
  background: linear-gradient(90deg, var(--blue), var(--cyan));
  border-radius: var(--radius) var(--radius) 0 0;
}

.scenario-card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-3px);
}

.scenario-visual {
  overflow: hidden;
  border-radius: 8px;
  margin-bottom: 20px;
  background: #eef5fa;
}

.scenario-visual img {
  width: 100%;
  display: block;
  object-fit: cover;
  transition: transform 0.4s ease;
}

.scenario-visual.contain img {
  object-fit: contain;
  padding: 12px;
  background: #f6f9fc;
}

.scenario-card:hover .scenario-visual img {
  transform: scale(1.04);
}

/* ---------- 产品化运营场景 横条布局 ---------- */
.scenario-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.scenario-row {
  display: grid;
  grid-template-columns: 64px 1fr auto;
  align-items: center;
  gap: 24px;
  padding: 28px 32px;
  border-radius: var(--radius);
  background: var(--white);
  border: 1px solid var(--line);
  transition: box-shadow var(--transition), border-color var(--transition), transform var(--transition);
  position: relative;
  overflow: hidden;
}

.scenario-row::before {
  content: "";
  position: absolute;
  left: 0; top: 0; bottom: 0;
  width: 4px;
  background: var(--sc, var(--blue));
  border-radius: var(--radius) 0 0 var(--radius);
}

.scenario-row:hover {
  box-shadow: var(--shadow);
  border-color: color-mix(in srgb, var(--sc, var(--blue)) 25%, var(--line));
  transform: translateX(3px);
}

.scenario-icon-wrap {
  width: 56px;
  height: 56px;
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: color-mix(in srgb, var(--sc, var(--blue)) 10%, transparent);
  color: var(--sc, var(--blue));
  flex-shrink: 0;
  transition: background var(--transition);
}

.scenario-row:hover .scenario-icon-wrap {
  background: color-mix(in srgb, var(--sc, var(--blue)) 18%, transparent);
}

.scenario-body {
  min-width: 0;
}

.scenario-meta {
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin-bottom: 6px;
  flex-wrap: wrap;
}

.scenario-meta h3 {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--deep);
  margin: 0;
}

.scenario-tag {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.03em;
  color: var(--sc, var(--blue));
  background: color-mix(in srgb, var(--sc, var(--blue)) 10%, transparent);
  padding: 2px 8px;
  border-radius: 20px;
  white-space: nowrap;
}

.scenario-body p {
  margin: 0;
  font-size: 14px;
  color: var(--muted);
  line-height: 1.6;
}

.scenario-metrics {
  display: flex;
  flex-direction: column;
  gap: 10px;
  min-width: 170px;
  flex-shrink: 0;
  border-left: 1px solid var(--line);
  padding-left: 28px;
}

.sm-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sm-item strong {
  font-size: 15px;
  font-weight: 700;
  color: var(--deep);
  line-height: 1.2;
}

.sm-item span {
  font-size: 11px;
  color: var(--muted);
  line-height: 1.4;
}

@media (max-width: 900px) {
  .scenario-row {
    grid-template-columns: 52px 1fr;
    gap: 16px;
    padding: 22px 20px;
  }
  .scenario-metrics {
    grid-column: 1 / -1;
    flex-direction: row;
    gap: 20px;
    border-left: none;
    border-top: 1px solid var(--line);
    padding-left: 0;
    padding-top: 16px;
    margin-top: 4px;
  }
}

@media (max-width: 540px) {
  .scenario-row { grid-template-columns: 44px 1fr; }
  .scenario-metrics { flex-wrap: wrap; }
}

/* ---------- 运营面板 ---------- */
.ops-panel {
  display: grid;
  width: min(100%, 300px);
  gap: 8px;
  padding: 14px;
  border-radius: var(--radius);
  background: #ffffff;
  box-shadow: 0 10px 28px rgba(12, 39, 71, 0.1);
}

.ops-row {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  padding: 8px 10px;
  border-radius: 8px;
  color: var(--muted);
  background: #f6f9fc;
  font-size: 13px;
  transition: background var(--transition);
}

.ops-row:hover { background: #edf2f7; }
.ops-row strong { color: var(--deep); }

/* ---------- Demo 网格 ---------- */
.demo-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.demo-card { overflow: hidden; padding: 0; }

.demo-stage {
  min-height: 300px;
  padding: 18px;
  background: #eef5fa;
}

/* 海报 Demo */
.poster-demo,
.member-demo,
.pearl-demo {
  min-height: 264px;
  overflow: hidden;
  border-radius: var(--radius);
  background: var(--white);
  border: 1px solid #dce5ee;
}

.poster-demo {
  position: relative;
  background:
    radial-gradient(circle at 22% 18%, rgba(255, 255, 255, 0.28), transparent 27%),
    linear-gradient(135deg, #73c5e7, #58a9da);
}

.poster-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 18px;
  font-weight: 800;
}

.poster-brand strong { color: #ff2aa1; font-size: 26px; }
.poster-brand span:last-child { color: #111827; font-size: 26px; font-weight: 500; }

.poster-title {
  position: absolute;
  left: 28px;
  top: 78px;
  display: grid;
  color: #ff5a94;
  font-size: 48px;
  font-weight: 800;
  line-height: 0.95;
}

.poster-title em { color: #f29a37; font-style: normal; }

.poster-ribbon {
  position: absolute;
  left: 24px;
  bottom: 42px;
  width: 58%;
  padding: 10px 16px;
  color: #0c5182;
  background: rgba(255, 255, 255, 0.92);
  font-size: 20px;
  font-weight: 900;
  transform: skewX(-8deg);
}

.poster-person {
  position: absolute;
  right: 22px;
  bottom: 26px;
  display: grid;
  place-items: center;
  width: 104px;
  height: 126px;
  border-radius: 42px 42px 18px 18px;
  color: #8b4a1d;
  background: linear-gradient(180deg, #ffd58d, #f29a37);
  font-weight: 800;
}

.poster-person::before {
  content: "";
  position: absolute;
  top: 15px;
  width: 54px;
  height: 54px;
  border-radius: 50%;
  background: #ffe2b6;
}

.poster-person span { position: relative; margin-top: 54px; }

/* 会员 Demo */
.member-demo,
.pearl-demo { padding: 14px; }

.demo-title-bar {
  margin: -14px -14px 14px;
  padding: 10px;
  color: #fff;
  text-align: center;
  background: #0b7fc2;
  font-size: 20px;
  font-weight: 900;
}

.gold-panel {
  padding: 16px;
  border-radius: var(--radius);
  background: linear-gradient(180deg, #ffe29d, #fff7df);
}

.gold-panel h4,
.pearl-demo h4 {
  margin: 0 0 12px;
  color: #9b6c15;
  text-align: center;
  font-size: 17px;
}

.benefit-list { display: grid; gap: 9px; }

.benefit-item {
  display: grid;
  grid-template-columns: 28px 1fr auto;
  align-items: center;
  gap: 8px;
  padding: 8px;
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.82);
  color: #344b63;
  font-size: 13px;
  transition: background var(--transition);
}

.benefit-item:hover { background: rgba(255, 255, 255, 0.98); }

.benefit-item i {
  display: grid;
  width: 28px;
  height: 28px;
  place-items: center;
  border-radius: 50%;
  color: #0b7fc2;
  background: #eef5fa;
  font-style: normal;
  font-weight: 900;
}

.benefit-item strong { color: #0b365f; }
.benefit-item small  { color: #c77c14; font-weight: 800; }

/* 珍珠 Demo */
.pearl-demo { background: #fff6ea; }

.pearl-head {
  margin: -14px -14px 14px;
  padding: 10px 14px;
  color: #102033;
  text-align: center;
  background: #efd0a6;
  font-weight: 900;
}

.pearl-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.pearl-item {
  min-height: 88px;
  padding: 10px;
  border-radius: 8px;
  background: #fff;
  color: #344b63;
  font-size: 13px;
  transition: box-shadow var(--transition);
}

.pearl-item:hover { box-shadow: 0 4px 12px rgba(189, 108, 24, 0.14); }

.pearl-item strong {
  display: block;
  color: #102033;
  margin-bottom: 6px;
}

.pearl-item small { color: #bd6c18; font-weight: 800; }

.demo-body { padding: 22px; }
.demo-body h3 { margin-bottom: 8px; }
.demo-body p { color: var(--muted); font-size: 14.5px; }

/* ---------- 媒体卡正文 ---------- */
.media-card .media-body { padding: 22px; }
.media-card .media-body h3 { margin-bottom: 8px; }
.media-card .media-body p  { color: var(--muted); }

/* ---------- 合作伙伴 ---------- */
.partner-wall {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
}

.pw-tag {
  display: inline-flex;
  align-items: center;
  padding: 6px 14px;
  border-radius: 100px;
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.01em;
  border: 1px solid transparent;
}

.pw-tag.aviation {
  background: #eaf4fb;
  color: #0c4478;
  border-color: #b5d4f4;
}

.pw-tag.finance {
  background: #edf7f2;
  color: #0a5534;
  border-color: #9fdec0;
}

.pw-tag.tech {
  background: #f5f0fb;
  color: #3d2080;
  border-color: #c9b5f0;
}

/* ---------- 联系页面 ---------- */
.contact-panel {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 40px;
  align-items: start;
}

.contact-form-card {
  padding: 36px;
}

.contact-info-col {
  padding: 8px 0;
}

.cinfo-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.cinfo-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}

.cinfo-item:first-child {
  border-top: 1px solid var(--line);
}

.cinfo-icon {
  width: 38px;
  height: 38px;
  border-radius: 10px;
  background: #eaf4fb;
  color: var(--blue);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.cinfo-label {
  font-size: 12px;
  font-weight: 600;
  color: var(--muted);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 4px;
}

.cinfo-value {
  font-size: 15px;
  font-weight: 600;
  color: var(--ink);
  line-height: 1.5;
}

/* ---------- 表单 FIX #6: 统一交互 ---------- */
.form { display: grid; gap: 16px; }

.form label {
  display: grid;
  gap: 7px;
  color: #2d4a60;
  font-weight: 600;
  font-size: 14px;
}

.form input,
.form textarea,
.form select {
  width: 100%;
  border: 1.5px solid var(--line);
  border-radius: var(--radius);
  padding: 12px 14px;
  color: var(--ink);
  font: inherit;
  font-size: 15px;
  background: var(--white);
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
  /* FIX: 确保 appearance 一致 */
  -webkit-appearance: none;
  appearance: none;
}

.form select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%235e7085' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  padding-right: 40px;
}

.form input:focus,
.form textarea:focus,
.form select:focus {
  border-color: var(--blue);
  box-shadow: 0 0 0 3px rgba(15, 104, 184, 0.12);
}

/* FIX: 错误状态 */
.form input.error,
.form textarea.error {
  border-color: #e53e3e;
  box-shadow: 0 0 0 3px rgba(229, 62, 62, 0.12);
}

.form textarea {
  min-height: 132px;
  resize: vertical;
}

/* ---------- 页脚 ---------- */
.site-footer {
  padding: 48px 0;
  color: #c9d8e5;
  background: #071d33;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 36px;
}

.site-footer h3 {
  margin-bottom: 14px;
  font-size: 17px;
  color: #e8f2fb;
}

.site-footer p,
.site-footer a {
  color: #a8c0d4;
  font-size: 14px;
  line-height: 1.75;
}

.footer-links { display: grid; grid-template-columns: 1fr 1fr; gap: 8px 24px; }

.footer-links h3 { grid-column: 1 / -1; }

.footer-links a {
  transition: color var(--transition);
}

.footer-links a:hover { color: var(--cyan); }

/* FIX #8: 补充 1200px 断点 */
@media (max-width: 1200px) {
  .nav-links a { font-size: 13px; padding: 0 8px; }
  .demo-grid { grid-template-columns: repeat(2, 1fr); }
}

/* ---------- 响应式：平板 960px ---------- */
@media (max-width: 960px) {
  .nav { min-height: 62px; }

  .nav-toggle { display: flex; align-items: center; justify-content: center; }

  .nav-links {
    position: absolute;
    top: 62px;
    left: 0;
    right: 0;
    display: none;
    flex-direction: column;
    align-items: stretch;
    padding: 14px 20px 24px;
    border-bottom: 1px solid var(--line);
    background: rgba(255, 255, 255, 0.98);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    box-shadow: 0 8px 24px rgba(12, 39, 71, 0.1);
  }

  @keyframes menuOpen {
    from { opacity: 0; transform: translateY(-8px); }
    to   { opacity: 1; transform: translateY(0); }
  }

  .nav-links.open {
    display: flex;
    animation: menuOpen 0.2s ease both;
  }

  .nav-links.closing {
    display: flex;
    animation: menuClose 0.18s ease both;
  }

  @keyframes menuClose {
    from { opacity: 1; transform: translateY(0); }
    to   { opacity: 0; transform: translateY(-8px); }
  }

  .nav-links a {
    justify-content: center;
    min-height: 48px;
    font-size: 15px;
    padding: 0 16px;
  }

  .hero,
  .hero.compact { min-height: auto; }

  .hero .container { padding: 74px 0; }

  .hero-metrics,
  .demo-grid,
  .grid.four,
  .ecosystem,
  .contact-panel,
  .footer-grid,
  .advantage-layout {
    grid-template-columns: 1fr;
  }

  .section-head { flex-direction: column; align-items: flex-start; }

  .grid.four { grid-template-columns: repeat(2, 1fr); }
  .grid.three { grid-template-columns: repeat(2, 1fr); }

  /* FIX #4: 移动端 orbit 改为静态布局 */
  .orbit {
    min-height: auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    padding: 20px;
    background: var(--paper);
    border-radius: var(--radius);
  }

  .orbit::before,
  .orbit::after { display: none; }

  .orbit-core,
  .orbit-node {
    position: static;
    transform: none !important;
    width: auto;
    height: auto;
    border-radius: var(--radius);
    padding: 20px;
    font-size: 14px;
  }

  .orbit-core {
    grid-column: 1 / -1;
    border-radius: var(--radius);
    min-height: 64px;
  }

  .feature-row { grid-template-columns: 1fr; gap: 6px; }
  .ticker-track { gap: 28px; }
  .ticker-track span { font-size: 13px; padding: 0 14px; }
  /* AI 页面：三列卡片在平板 / 手机换行 */
  .ai-cards-grid { grid-template-columns: 1fr !important; }
  .ai-hero-metrics { grid-template-columns: repeat(2, auto); gap: 28px; }
  .pipeline-steps { grid-template-columns: repeat(2, 1fr); }
  .pipeline-steps::before { display: none; }
  .matrix-grid { grid-template-columns: repeat(2, 1fr); }
  .ai-scene { flex-direction: column; }
  .ai-scene.reverse { flex-direction: column; }
  .feature-row strong { color: var(--blue); }
}

/* ---------- 响应式：手机 620px ---------- */
@media (max-width: 620px) {
  .container { width: min(100% - 28px, 1180px); }

  h1 { font-size: 34px; }
  h2 { font-size: 24px; }
  .ai-hero { padding: 72px 0 56px; }
  .ai-hero-metrics { grid-template-columns: repeat(2, 1fr); gap: 20px; }
  .ai-hero-metric .num { font-size: 28px; }
  .pipeline-steps { grid-template-columns: 1fr; }
  .matrix-grid { grid-template-columns: 1fr; }

  .ticker-track span { font-size: 12px; padding: 0 10px; }
  .section { padding: 64px 0; }

  .hero-actions { flex-direction: column; }
  .hero-actions .button { width: 100%; justify-content: center; }

  .metric,
  .card { padding: 22px; }
  .contact-form-card { padding: 24px 20px; }

  .timeline::before { display: none; }
  .timeline-item::before { display: none; }

  .timeline-item {
    grid-template-columns: 1fr;
    padding-bottom: 20px;
  }
  .timeline-year { text-align: left; font-size: 16px; padding-top: 0; margin-bottom: 4px; }
  .timeline-body { margin-left: 0; }

  .feature-row { grid-template-columns: 1fr; }

  .feature-row strong { background: #f2f8fd; padding: 4px 8px; border-radius: 4px; }

  .demo-grid { grid-template-columns: 1fr; }
  .grid.three { grid-template-columns: 1fr; }

  .grid.four { grid-template-columns: 1fr; }

  .virtual-showcase { grid-template-columns: 1fr; }
  .virtual-showcase img { height: 220px; }

  .hero-metrics { grid-template-columns: repeat(2, 1fr); }

  .cta-band { padding: 56px 0; }
  .cta-band h2 { font-size: 22px; }
  .footer-grid { gap: 24px; }
}

/* FIX #8: 补充小屏断点 */
@media (max-width: 480px) {
  .hero-metrics { grid-template-columns: 1fr 1fr; gap: 10px; }
  .grid.four { grid-template-columns: 1fr; }
  .footer-links { grid-template-columns: 1fr; }
  h1 { font-size: 30px; }
  .button { min-height: 44px; font-size: 14px; }
}

/* ---------- 减少动画（无障碍） ---------- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* ---------- 打印样式 FIX #10 ---------- */
@media print {
  .site-header,
  .home-ticker,
  .hero-actions,
  .nav-toggle,
  .site-footer { display: none !important; }

  /* FIX #10: 打印时 hero 去掉背景，文字改为深色可读 */
  .hero {
    min-height: auto;
    background: none !important;
    color: var(--ink) !important;
    padding: 32px 0 !important;
  }

  .hero h1,
  .hero-lead,
  .hero p { color: var(--ink) !important; }

  .hero .eyebrow { color: var(--blue) !important; }
  .hero-grid-bg { display: none; }

  .card { box-shadow: none; border: 1px solid var(--line); }
}

/* ---------- 工具类（替代常见内联样式）---------- */
.mb-0  { margin-bottom: 0 !important; }
.mt-0  { margin-top: 0 !important; }
.mb-8  { margin-bottom: 32px; }
.mt-8  { margin-top: 32px; }
.text-center { text-align: center; }
.text-muted  { color: var(--muted); }
.align-start { align-items: start; }
.gap-large   { gap: 48px; }
.h2-sub      { font-size: clamp(22px, 3vw, 32px); margin-bottom: 16px; }

/* -----------------------------------------------
   扩展工具类：消除全站内联样式
   覆盖 ai / about / cases / contact /
         index / products / solutions / technology
   ----------------------------------------------- */

/* 布局 */
.justify-center   { justify-content: center; }
.grid-cols-2      { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: start; }
.grid-cols-2-sm   { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.ai-empower-grid  { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }

/* 间距 */
.mt-12   { margin-top: 12px; }
.mt-16   { margin-top: 16px; }
.mt-18   { margin-top: 18px; }
.mt-20   { margin-top: 20px; }
.mt-22   { margin-top: 22px; }
.mt-28   { margin-top: 28px; }
.mb-6    { margin-bottom: 6px; }
.mb-10   { margin-bottom: 10px; }
.mb-16   { margin-bottom: 16px; }
.mb-20   { margin-bottom: 20px; }
.mb-24   { margin-bottom: 24px; }
.mb-28   { margin-bottom: 28px; }
.mb-32   { margin-bottom: 32px; }
.ml-6    { margin-left: 6px; }
.ml-8    { margin-left: 8px; }

/* 字体 */
.fs-12   { font-size: 12px; }
.fs-13   { font-size: 13px; }
.fs-14   { font-size: 14px; }
.fs-22   { font-size: 22px; }
.fw-600  { font-weight: 600; }
.fw-700  { font-weight: 700; }
.lh-17   { line-height: 1.7; }

/* 颜色 — 浅色页面 */
.color-blue   { color: var(--blue); }
.color-green  { color: var(--green); }
.color-gold   { color: var(--gold); }
.color-muted  { color: var(--muted); }
.color-error  { color: #e53e3e; }

/* 颜色 — 深色背景专用 */
.color-cyan-dark  { color: #63d4f2; }   /* ai-cta eyebrow, ai-matrix eyebrow */
.color-white      { color: #fff; }
.color-white-60   { color: rgba(255,255,255,.6); }

/* ai.html 专项 */
/* ai-cards-grid 三列在 desktop 保持 repeat(3,1fr)，
   styles.css 的 960px 响应式已写 .ai-cards-grid { grid-template-columns: 1fr !important }
   故只需在桌面端设置三列 */
.ai-cards-grid-3col { grid-template-columns: repeat(3, 1fr); }

/* about.html — 链接样式 */
.link-more {
  font-size: 13px;
  font-weight: 600;
  color: var(--blue);
}
.link-more-green { color: var(--green); }
.link-more-gold  { color: var(--gold); }

/* about.html — 路线图年份标注 */
.roadmap-year {
  font-size: 12px;
  color: var(--muted);
  margin-bottom: 10px;
}

/* contact.html — 表单区域文字 */
.contact-intro-p {
  color: var(--muted);
  line-height: 1.7;
  margin-bottom: 32px;
}
.form-hint {
  margin: 0 0 22px;
  color: var(--muted);
  font-size: 14px;
}

/* cases.html — partner-wall 间距 */
.partner-wall-top { margin-bottom: 22px; }

/* technology.html — airndc logo */
.airndc-logo {
  max-width: 160px;
  margin-bottom: 18px;
}
.eyebrow-plain {
  margin-bottom: 20px;   /* technology.html API Output eyebrow */
}
.mt-28-center {
  margin-top: 28px;
  text-align: center;
}

/* products.html — zone 区块 padding */
.zone-pad { padding: 40px 0 56px; }

/* products.html — 说明段落（深色区 aside） */
.zone-desc {
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 24px;
}
.zone-desc-sm {
  color: var(--muted);
  font-size: 14px;
  margin: 0 0 24px;
}
.zone-note {
  margin-top: 20px;
  font-size: 14px;
  color: var(--muted);
}

/* products.html — hidden 权益芯片（JS 展开） */
.hidden { display: none; }

/* products.html — 展开按钮行 */
.expand-row {
  margin-top: 20px;
  text-align: center;
}

/* products.html — AI 赋能格 card 样式 */
.empower-card {
  border-radius: var(--radius);
  overflow: hidden;
}
.empower-card--bps { border: 1px solid var(--bps-line); }
.empower-card--go  { border: 1px solid var(--go-line); }

.empower-card-head {
  color: #fff;
  padding: 14px 20px;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .05em;
  display: flex;
  align-items: center;
  gap: 8px;
}
.empower-card-head--bps { background: var(--bps-accent); }
.empower-card-head--go  { background: var(--go-accent); }

.empower-card-badge {
  background: rgba(255,255,255,.2);
  padding: 2px 8px;
  border-radius: 8px;
  font-size: 11px;
}
.empower-card-body {
  padding: 4px 0;
  background: #fff;
}

/* products.html — AI CTA 深紫卡片 */
.ai-cta-card {
  background: linear-gradient(135deg, #1a0a3d 0%, #351562 100%);
  border-radius: var(--radius);
  padding: 40px;
  text-align: center;
}
.ai-cta-card-eyebrow {
  color: rgba(255,255,255,.6);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  margin: 0 0 12px;
}
.ai-cta-card-title {
  color: #fff;
  font-size: 22px;
  margin: 0 0 10px;
}
.ai-cta-card-desc {
  color: rgba(255,255,255,.6);
  font-size: 14px;
  margin: 0 0 24px;
}
.btn-ai-purple {
  background: #be8cff;
  border-color: #be8cff;
  color: #1a0a3d;
  font-weight: 700;
}

/* chip 内联标签左距 */
.chip-label { margin-left: 8px; }

/* ai.html — ai-link-accent */
.link-ai-accent { color: var(--ai-accent); font-weight: 600; }

@media (max-width: 960px) {
  .grid-cols-2,
  .grid-cols-2-sm,
  .ai-empower-grid { grid-template-columns: 1fr; }
}