/* =====================================================================
   北京中科新锐信息科技有限公司 — 官网设计系统
   Design System: "深蓝科技 · 政企稳重"
   Author: WorkBuddy
   ---------------------------------------------------------------------
   目录
   0. 字体
   1. 设计 Token（颜色 / 字体 / 间距 / 阴影 / 圆角 / 动效）
   2. 基础重置与排版
   3. 布局容器与栅格
   4. 通用组件（按钮 / 标签 / 卡片 / 分割线 / 图标）
   5. 页头与导航
   6. 页脚
   7. 首页模块
   8. 内页通用模块
   9. 动效
   10. 响应式
   ===================================================================== */

/* ---------------------------------------------------------------
   0. 字体（自托管，仅拉丁字形；中文走系统字体栈）
   --------------------------------------------------------------- */
@font-face {
  font-family: 'Inter';
  src: url('../fonts/inter-latin.woff2') format('woff2-variations'),
       url('../fonts/inter-latin.woff2') format('woff2');
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}

/* ---------------------------------------------------------------
   1. 设计 Token
   --------------------------------------------------------------- */
:root {
  /* 深蓝主色系 */
  --navy-950: #040B18;
  --navy-900: #071429;
  --navy-850: #0A1B33;
  --navy-800: #0D2240;
  --navy-700: #123055;
  --navy-600: #17406F;

  --brand-800: #083A87;
  --brand-700: #0B4FB0;
  --brand-600: #1266E0;
  --brand-500: #2E86FF;
  --brand-400: #5EA4FF;
  --brand-300: #93C2FF;
  --brand-100: #DCEAFF;
  --brand-050: #EFF6FF;

  --sky-500: #12A5D6;
  --sky-400: #2FBDE8;
  --cyan-400: #38C9E8;

  /* 三大业务方向强调色（均属蓝-青-碧 家族，保持统一调性） */
  --c-low: #0FA6D8;   /* 低空经济 — 天青 */
  --c-ai:  #4364F0;   /* 人工智能 — 靛蓝（纯色，非渐变） */
  --c-ic:  #0FA893;   /* 集成电路 — 碧绿 */

  /* 中性色 */
  --ink-900: #08152A;
  --ink-800: #12233D;
  --ink-700: #22344D;
  --ink-600: #3A4C66;
  --ink-500: #5A6C85;
  --ink-400: #8494A9;
  --ink-300: #AEBBCB;
  --line:    #E3E9F2;
  --line-2:  #EDF1F7;
  --bg:      #FFFFFF;
  --bg-soft: #F5F8FC;
  --bg-tint: #EDF3FB;

  /* 语义色 */
  --success: #12A06A;

  /* 字体 */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'PingFang SC',
               'HarmonyOS Sans SC', 'Microsoft YaHei', 'Source Han Sans SC',
               'Noto Sans CJK SC', system-ui, sans-serif;
  --font-mono: 'SFMono-Regular', 'JetBrains Mono', Consolas, 'Courier New', monospace;

  /* 字号（流式） */
  --fs-display: clamp(2.6rem, 1.4rem + 4.6vw, 4.6rem);
  --fs-h1: clamp(2.1rem, 1.35rem + 2.9vw, 3.4rem);
  --fs-h2: clamp(1.7rem, 1.2rem + 1.9vw, 2.5rem);
  --fs-h3: clamp(1.25rem, 1.05rem + 0.7vw, 1.6rem);
  --fs-h4: clamp(1.08rem, 1rem + 0.32vw, 1.28rem);
  --fs-lead: clamp(1.03rem, 0.96rem + 0.42vw, 1.22rem);
  --fs-body: 1rem;
  --fs-sm: 0.9rem;
  --fs-xs: 0.8rem;
  --fs-eyebrow: 0.78rem;

  /* 间距尺度 */
  --sp-1: 4px;
  --sp-2: 8px;
  --sp-3: 12px;
  --sp-4: 16px;
  --sp-5: 24px;
  --sp-6: 32px;
  --sp-7: 44px;
  --sp-8: 64px;
  --sp-9: 88px;
  --sp-10: 120px;

  /* 区块垂直节奏 */
  --section-y: clamp(64px, 3.4rem + 4vw, 118px);

  /* 容器 */
  --container: 1240px;
  --container-narrow: 960px;

  /* 圆角 */
  --r-xs: 6px;
  --r-sm: 10px;
  --r-md: 14px;
  --r-lg: 20px;
  --r-xl: 28px;
  --r-pill: 999px;

  /* 阴影（多层柔和） */
  --sh-xs: 0 1px 2px rgba(10, 30, 60, .05);
  --sh-sm: 0 1px 2px rgba(10, 30, 60, .04), 0 4px 12px rgba(10, 30, 60, .05);
  --sh-md: 0 2px 4px rgba(10, 30, 60, .04), 0 12px 28px rgba(10, 30, 60, .07);
  --sh-lg: 0 4px 8px rgba(10, 30, 60, .05), 0 24px 56px rgba(10, 30, 60, .10);
  --sh-brand: 0 8px 24px rgba(18, 102, 224, .22);

  /* 动效 */
  --ease: cubic-bezier(.22, .61, .36, 1);
  --ease-out: cubic-bezier(.16, 1, .3, 1);
  --dur: .32s;

  --header-h: 74px;
}

/* ---------------------------------------------------------------
   2. 基础重置与排版
   --------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-h) + 16px);
}

body {
  margin: 0;
  font-family: var(--font-sans);
  font-size: var(--fs-body);
  line-height: 1.75;
  color: var(--ink-700);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: 'cv02', 'cv03', 'cv04', 'ss01';
  overflow-x: hidden;
}

h1, h2, h3, h4, h5 {
  margin: 0 0 .6em;
  color: var(--ink-900);
  font-weight: 700;
  line-height: 1.24;
  letter-spacing: -.015em;
}
h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }
h4 { font-size: var(--fs-h4); line-height: 1.4; }

p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }

a { color: var(--brand-700); text-decoration: none; transition: color var(--dur) var(--ease); }
a:hover { color: var(--brand-500); }

img, svg { max-width: 100%; display: block; }
ul, ol { margin: 0; padding: 0; list-style: none; }
strong { font-weight: 650; color: var(--ink-800); }
hr { border: 0; border-top: 1px solid var(--line); margin: var(--sp-7) 0; }

::selection { background: var(--brand-100); color: var(--brand-800); }

:focus-visible {
  outline: 2px solid var(--brand-500);
  outline-offset: 3px;
  border-radius: var(--r-xs);
}

/* ---------------------------------------------------------------
   3. 布局容器与栅格
   --------------------------------------------------------------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: clamp(20px, 4vw, 40px);
}
.container--narrow { max-width: var(--container-narrow); }

.section { padding-block: var(--section-y); position: relative; }
.section--soft { background: var(--bg-soft); }
.section--tint { background: var(--bg-tint); }
.section--navy {
  background: var(--navy-900);
  color: #C6D4E6;
}
.section--navy h1, .section--navy h2, .section--navy h3, .section--navy h4 { color: #fff; }
.section--navy p { color: #A9BDD6; }
.section--tight { padding-block: clamp(44px, 2.4rem + 3vw, 76px); }

.grid { display: grid; gap: var(--sp-5); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
.grid--5 { grid-template-columns: repeat(5, 1fr); }

/* ---------------------------------------------------------------
   4. 通用组件
   --------------------------------------------------------------- */

/* — 区块小标题 — */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-size: var(--fs-eyebrow);
  font-weight: 650;
  letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--brand-600);
  margin-bottom: var(--sp-4);
}
.eyebrow::before {
  content: '';
  width: 26px; height: 2px;
  background: linear-gradient(90deg, var(--brand-600), var(--sky-400));
  border-radius: 2px;
}
.eyebrow--light { color: var(--brand-300); }
.eyebrow--light::before { background: linear-gradient(90deg, var(--brand-400), var(--cyan-400)); }
.eyebrow--center { justify-content: center; }

.section-head { max-width: 760px; margin-bottom: var(--sp-8); }
.section-head--center { margin-inline: auto; text-align: center; }
.section-head p { font-size: var(--fs-lead); color: var(--ink-500); }
.section--navy .section-head p { color: #9DB4D2; }

/* — 按钮 — */
.btn {
  --btn-bg: var(--brand-600);
  --btn-fg: #fff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px 26px;
  font-family: inherit;
  font-size: .95rem;
  font-weight: 600;
  letter-spacing: .01em;
  line-height: 1;
  color: var(--btn-fg);
  background: var(--btn-bg);
  border: 1px solid transparent;
  border-radius: var(--r-sm);
  cursor: pointer;
  white-space: nowrap;
  transition: transform var(--dur) var(--ease),
              box-shadow var(--dur) var(--ease),
              background var(--dur) var(--ease),
              border-color var(--dur) var(--ease),
              color var(--dur) var(--ease);
}
.btn:hover { transform: translateY(-2px); box-shadow: var(--sh-brand); color: var(--btn-fg); }
.btn:active { transform: translateY(0); }
.btn .icon { width: 18px; height: 18px; }

.btn--primary { --btn-bg: var(--brand-600); }
.btn--primary:hover { --btn-bg: var(--brand-500); }

.btn--ghost {
  --btn-bg: transparent;
  --btn-fg: var(--ink-800);
  border-color: var(--line);
  box-shadow: var(--sh-xs);
  background: #fff;
}
.btn--ghost:hover { border-color: var(--brand-400); color: var(--brand-700); box-shadow: var(--sh-sm); }

.btn--light {
  --btn-bg: rgba(255,255,255,.10);
  --btn-fg: #fff;
  border-color: rgba(255,255,255,.28);
  backdrop-filter: blur(6px);
}
.btn--light:hover { background: rgba(255,255,255,.18); box-shadow: 0 10px 30px rgba(0,0,0,.28); }

.btn--white { --btn-bg: #fff; --btn-fg: var(--navy-800); }
.btn--white:hover { --btn-bg: #F2F7FF; --btn-fg: var(--navy-900); box-shadow: 0 12px 34px rgba(4, 11, 24, .34); }

.btn--sm { padding: 10px 18px; font-size: .88rem; }
.btn--lg { padding: 16px 32px; font-size: 1rem; }
.btn--block { width: 100%; }

/* — 文本链接箭头 — */
.link-arrow {
  display: inline-flex; align-items: center; gap: 8px;
  font-weight: 600; font-size: .93rem; color: var(--brand-700);
}
.link-arrow .icon { width: 16px; height: 16px; transition: transform var(--dur) var(--ease); }
.link-arrow:hover .icon { transform: translateX(4px); }

/* — 图标 — */
.icon {
  width: 24px; height: 24px;
  flex: none;
  stroke: currentColor;
  stroke-width: 1.6;
  stroke-linecap: round;
  stroke-linejoin: round;
  fill: none;
}
.icon--sm { width: 18px; height: 18px; }
.icon--lg { width: 28px; height: 28px; }
.icon--xl { width: 34px; height: 34px; }

/* 图标外框 */
.icon-box {
  display: inline-flex; align-items: center; justify-content: center;
  width: 48px; height: 48px;
  border-radius: var(--r-md);
  background: var(--brand-050);
  color: var(--brand-600);
  flex: none;
}
.icon-box--low { background: rgba(15,166,216,.10); color: var(--c-low); }
.icon-box--ai  { background: rgba(67,100,240,.10); color: var(--c-ai); }
.icon-box--ic  { background: rgba(15,168,147,.10); color: var(--c-ic); }
.icon-box--dark { background: rgba(255,255,255,.08); color: #8FC0FF; }
.icon-box--lg { width: 56px; height: 56px; border-radius: var(--r-lg); }

/* — 卡片 — */
.card {
  position: relative;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-lg);
  padding: var(--sp-6);
  transition: transform var(--dur) var(--ease),
              box-shadow var(--dur) var(--ease),
              border-color var(--dur) var(--ease);
}
.card--hover:hover { transform: translateY(-4px); box-shadow: var(--sh-lg); border-color: var(--brand-100); }
.card--flat { box-shadow: none; }
.card--pad-lg { padding: var(--sp-7); }

.card__title { margin: var(--sp-4) 0 var(--sp-2); font-size: var(--fs-h3); }
.card__text { color: var(--ink-500); font-size: .96rem; }

/* 编号标签 */
.num-tag {
  display: inline-flex; align-items: center; justify-content: center;
  min-width: 34px; height: 34px; padding-inline: 9px;
  font-family: var(--font-mono);
  font-size: .86rem; font-weight: 600;
  color: var(--brand-600);
  background: var(--brand-050);
  border-radius: var(--r-xs);
  letter-spacing: .02em;
}

/* — 统计数字 — */
.stat__num {
  font-family: var(--font-sans);
  font-size: clamp(1.9rem, 1.3rem + 2vw, 2.9rem);
  font-weight: 750;
  line-height: 1;
  letter-spacing: -.03em;
  font-variant-numeric: tabular-nums;
  color: var(--ink-900);
}
.stat__num .unit { font-size: .5em; font-weight: 650; margin-left: 3px; letter-spacing: 0; }
.stat__label { margin-top: 10px; font-size: .9rem; color: var(--ink-500); }
.section--navy .stat__num { color: #fff; }
.section--navy .stat__label { color: #93AACB; }

/* — 徽标 / 胶囊标签 — */
.chip {
  display: inline-flex; align-items: center; gap: 7px;
  padding: 6px 13px;
  font-size: .82rem; font-weight: 550;
  color: var(--brand-700);
  background: var(--brand-050);
  border: 1px solid var(--brand-100);
  border-radius: var(--r-pill);
  white-space: nowrap;
}
.chip--low { color: #0A7FA8; background: rgba(15,166,216,.08); border-color: rgba(15,166,216,.20); }
.chip--ai  { color: #3249C4; background: rgba(67,100,240,.08); border-color: rgba(67,100,240,.20); }
.chip--ic  { color: #0B8172; background: rgba(15,168,147,.08); border-color: rgba(15,168,147,.20); }
.chip--light { color: #BFD6F5; background: rgba(255,255,255,.06); border-color: rgba(255,255,255,.16); }
.chip-row { display: flex; flex-wrap: wrap; gap: 9px; }

/* — 项目符号列表 — */
.ticks { display: grid; gap: 11px; }
.ticks li {
  position: relative;
  padding-left: 30px;
  color: var(--ink-600);
  font-size: .96rem;
}
.ticks li::before {
  content: '';
  position: absolute; left: 0; top: .52em;
  width: 16px; height: 16px;
  background-color: transparent;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%231266E0' stroke-width='2.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6 9 17l-5-5'/%3E%3C/svg%3E");
  background-size: 16px 16px;
  background-repeat: no-repeat;
}
.section--navy .ticks li { color: #AFC3DC; }
.section--navy .ticks li::before {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%235EA4FF' stroke-width='2.4' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M20 6 9 17l-5-5'/%3E%3C/svg%3E");
}

/* — 表格 — */
.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: var(--r-md); }
table.data { width: 100%; border-collapse: collapse; font-size: .93rem; min-width: 560px; }
table.data th, table.data td { padding: 14px 18px; text-align: left; border-bottom: 1px solid var(--line-2); }
table.data thead th {
  background: var(--bg-soft);
  color: var(--ink-800);
  font-weight: 650;
  font-size: .84rem;
  letter-spacing: .04em;
  text-transform: uppercase;
  white-space: nowrap;
}
table.data tbody tr:last-child td { border-bottom: 0; }
table.data tbody tr:hover { background: var(--brand-050); }
table.data td:first-child { font-weight: 600; color: var(--ink-800); }

/* — 面包屑 / 页面导航 — */
.breadcrumb { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; font-size: .86rem; color: var(--ink-400); }
.breadcrumb a { color: var(--ink-400); }
.breadcrumb a:hover { color: var(--brand-600); }
.breadcrumb .sep { color: var(--ink-300); }

/* ---------------------------------------------------------------
   5. 页头与导航
   --------------------------------------------------------------- */
.header {
  position: sticky; top: 0; z-index: 100;
  height: var(--header-h);
  background: rgba(255,255,255,.86);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease), background var(--dur) var(--ease);
}
.header.is-scrolled { border-bottom-color: var(--line); box-shadow: 0 4px 24px rgba(10, 30, 60, .06); }
.header__inner {
  height: 100%;
  display: flex; align-items: center; gap: var(--sp-6);
  justify-content: space-between;
}

/* Logo */
.logo { display: inline-flex; align-items: center; gap: 12px; flex: none; }
.logo__mark { width: 38px; height: 38px; flex: none; }
.logo__text { display: flex; flex-direction: column; line-height: 1.12; }
.logo__cn { font-size: 1.06rem; font-weight: 750; letter-spacing: .04em; color: var(--ink-900); }
.logo__en { font-size: .6rem; font-weight: 500; letter-spacing: .18em; color: var(--ink-400); text-transform: uppercase; }

/* 主导航 */
.nav { display: flex; align-items: center; gap: 2px; margin-left: auto; }
.nav__link {
  position: relative;
  padding: 9px 14px;
  font-size: .93rem; font-weight: 550;
  color: var(--ink-600);
  border-radius: var(--r-xs);
  white-space: nowrap;
  transition: color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.nav__link:hover { color: var(--brand-700); background: var(--brand-050); }
.nav__link.is-active { color: var(--brand-700); }
.nav__link.is-active::after {
  content: ''; position: absolute; left: 14px; right: 14px; bottom: 2px;
  height: 2px; border-radius: 2px;
  background: linear-gradient(90deg, var(--brand-600), var(--sky-400));
}
.header__cta { flex: none; }

/* 移动端汉堡 */
.nav-toggle {
  display: none;
  width: 44px; height: 44px;
  align-items: center; justify-content: center;
  background: transparent; border: 1px solid var(--line);
  border-radius: var(--r-sm); cursor: pointer; color: var(--ink-800);
}
.nav-toggle .icon { width: 22px; height: 22px; }
.nav-toggle .icon-close { display: none; }
body.nav-open .nav-toggle .icon-menu { display: none; }
body.nav-open .nav-toggle .icon-close { display: block; }

/* 移动端抽屉 */
.mobile-panel {
  position: fixed; inset: var(--header-h) 0 0 0;
  z-index: 99;
  background: #fff;
  border-top: 1px solid var(--line);
  padding: var(--sp-5) clamp(20px, 5vw, 32px) var(--sp-8);
  overflow-y: auto;
  transform: translateY(-8px);
  opacity: 0; visibility: hidden;
  transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease), visibility var(--dur);
}
body.nav-open .mobile-panel { opacity: 1; visibility: visible; transform: none; }
.mobile-panel__link {
  display: flex; align-items: center; justify-content: space-between;
  padding: 15px 4px;
  font-size: 1.02rem; font-weight: 600; color: var(--ink-800);
  border-bottom: 1px solid var(--line-2);
}
.mobile-panel__link .icon { width: 18px; height: 18px; color: var(--ink-300); }
.mobile-panel__link.is-active { color: var(--brand-700); }
.mobile-panel .btn { margin-top: var(--sp-6); }

/* ---------------------------------------------------------------
   6. 页脚
   --------------------------------------------------------------- */
.footer { background: var(--navy-950); color: #93AACB; padding-top: clamp(52px, 4vw, 84px); }
.footer a { color: #93AACB; }
.footer a:hover { color: #fff; }
.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: var(--sp-7) var(--sp-6);
  padding-bottom: var(--sp-8);
}
.footer__brand .logo__cn { color: #fff; }
.footer__brand .logo__en { color: #5E7396; }
.footer__desc { margin-top: var(--sp-5); font-size: .92rem; color: #8299BB; max-width: 34ch; }
.footer__col h5 { color: #fff; font-size: .82rem; font-weight: 650; letter-spacing: .12em; text-transform: uppercase; margin-bottom: var(--sp-4); }
.footer__col li { margin-bottom: 11px; font-size: .92rem; }
.footer__bottom {
  border-top: 1px solid rgba(255,255,255,.09);
  padding-block: var(--sp-5);
  display: flex; flex-wrap: wrap; gap: var(--sp-4);
  align-items: center; justify-content: space-between;
  font-size: .84rem; color: #6C83A5;
}
.footer__bottom-links { display: flex; flex-wrap: wrap; gap: 20px; }

/* ---------------------------------------------------------------
   7. 首页模块
   --------------------------------------------------------------- */

/* — Hero — */
.hero {
  position: relative;
  background: var(--navy-950);
  color: #C6D4E6;
  overflow: hidden;
  padding-block: clamp(72px, 5rem + 6vw, 140px) clamp(80px, 5rem + 6vw, 150px);
}
.hero__bg { position: absolute; inset: 0; z-index: 0; pointer-events: none; }
.hero__grid-lines {
  position: absolute; inset: -1px;
  background-image:
    linear-gradient(rgba(120, 170, 255, .07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120, 170, 255, .07) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(120% 85% at 62% 22%, #000 0%, rgba(0,0,0,.35) 55%, transparent 82%);
  -webkit-mask-image: radial-gradient(120% 85% at 62% 22%, #000 0%, rgba(0,0,0,.35) 55%, transparent 82%);
}
.hero__glow-a {
  position: absolute; width: 900px; height: 900px; right: -180px; top: -330px;
  background: radial-gradient(circle, rgba(18,102,224,.42) 0%, rgba(18,102,224,.12) 38%, transparent 68%);
  filter: blur(10px);
}
.hero__glow-b {
  position: absolute; width: 640px; height: 640px; left: -180px; bottom: -280px;
  background: radial-gradient(circle, rgba(18,165,214,.26) 0%, transparent 66%);
}
.hero__visual {
  position: absolute; right: -4%; top: 50%; transform: translateY(-50%);
  width: min(56vw, 760px); opacity: .9; z-index: 1;
}
.hero__inner { position: relative; z-index: 2; display: grid; grid-template-columns: 1.05fr .95fr; gap: var(--sp-8); align-items: center; }
.hero__content { max-width: 640px; }
.hero__badge {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 7px 15px 7px 11px;
  font-size: .82rem; font-weight: 550; letter-spacing: .02em;
  color: #BFD6F5;
  background: rgba(255,255,255,.06);
  border: 1px solid rgba(255,255,255,.14);
  border-radius: var(--r-pill);
  margin-bottom: var(--sp-5);
}
.hero__badge .dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--cyan-400);
  box-shadow: 0 0 0 4px rgba(56,201,232,.18);
}
.hero h1 {
  color: #fff;
  font-size: var(--fs-display);
  font-weight: 750;
  letter-spacing: -.03em;
  line-height: 1.1;
  margin-bottom: var(--sp-5);
}
.hero h1 .accent {
  background: linear-gradient(100deg, #5EA4FF 0%, #38C9E8 60%, #6FE3D8 100%);
  -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent; color: transparent;
}
.hero__lead { font-size: var(--fs-lead); line-height: 1.85; color: #A9BDD6; margin-bottom: var(--sp-7); max-width: 56ch; }
.hero__actions { display: flex; flex-wrap: wrap; gap: var(--sp-4); }

/* Hero 数据条 */
.hero__stats {
  position: relative; z-index: 2;
  margin-top: clamp(48px, 3rem + 3vw, 76px);
  display: grid; grid-template-columns: repeat(4, 1fr);
  border-top: 1px solid rgba(255,255,255,.10);
  padding-top: var(--sp-6);
  gap: var(--sp-5);
}
.hero__stat .stat__num { color: #fff; }
.hero__stat .stat__label { color: #8FA6C6; }

/* — 信任栏 — */
.trust { padding-block: clamp(36px, 2.4rem + 2vw, 56px); background: #fff; border-bottom: 1px solid var(--line); }
.trust__label {
  text-align: center; font-size: .82rem; letter-spacing: .14em; text-transform: uppercase;
  color: var(--ink-400); font-weight: 600; margin-bottom: var(--sp-6);
}
.trust__row {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--sp-5);
}
.trust__item {
  display: flex; align-items: center; gap: 14px;
  padding: var(--sp-4) var(--sp-5);
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--r-md);
}
.trust__item .icon-box { width: 42px; height: 42px; background: #fff; border: 1px solid var(--line); }
.trust__name { font-weight: 650; color: var(--ink-800); font-size: .95rem; line-height: 1.3; }
.trust__sub { font-size: .78rem; color: var(--ink-400); line-height: 1.4; }

/* — 业务方向大卡 — */
.dir-card {
  position: relative;
  display: flex; flex-direction: column;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-xl);
  padding: var(--sp-7);
  overflow: hidden;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.dir-card::before {
  content: ''; position: absolute; left: 0; top: 0; height: 3px; width: 100%;
  background: var(--dir-accent, var(--brand-600));
  transform: scaleX(0); transform-origin: left;
  transition: transform .5s var(--ease-out);
}
.dir-card:hover { transform: translateY(-6px); box-shadow: var(--sh-lg); border-color: var(--line); }
.dir-card:hover::before { transform: scaleX(1); }
.dir-card--low { --dir-accent: linear-gradient(90deg, #0FA6D8, #38C9E8); }
.dir-card--ai  { --dir-accent: linear-gradient(90deg, #4364F0, #6E8CFF); }
.dir-card--ic  { --dir-accent: linear-gradient(90deg, #0FA893, #3BD1B8); }
.dir-card__head { display: flex; align-items: center; justify-content: space-between; gap: var(--sp-4); margin-bottom: var(--sp-5); }
.dir-card__en { font-size: .68rem; font-weight: 600; letter-spacing: .2em; text-transform: uppercase; color: var(--ink-300); }
.dir-card h3 { font-size: 1.42rem; margin-bottom: var(--sp-3); }
.dir-card p { color: var(--ink-500); font-size: .95rem; margin-bottom: var(--sp-5); }
.dir-card__list { display: grid; gap: 9px; margin-bottom: var(--sp-6); }
.dir-card__list li { position: relative; padding-left: 18px; font-size: .9rem; color: var(--ink-600); }
.dir-card__list li::before {
  content: ''; position: absolute; left: 0; top: .62em;
  width: 6px; height: 6px; border-radius: 50%; background: var(--brand-400);
}
.dir-card--low .dir-card__list li::before { background: var(--c-low); }
.dir-card--ai  .dir-card__list li::before { background: var(--c-ai); }
.dir-card--ic  .dir-card__list li::before { background: var(--c-ic); }
.dir-card__foot { margin-top: auto; padding-top: var(--sp-2); }
.dir-card__art { position: absolute; right: -30px; bottom: -30px; width: 170px; opacity: .07; pointer-events: none; }

/* — 服务体系流程 — */
.flow { position: relative; display: grid; grid-template-columns: repeat(5, 1fr); gap: var(--sp-4); }
.flow__line {
  position: absolute; left: 8%; right: 8%; top: 27px; height: 2px;
  background: linear-gradient(90deg, var(--brand-100), var(--brand-400), var(--brand-100));
  border-radius: 2px; z-index: 0;
}
.flow__step { position: relative; z-index: 1; text-align: center; }
.flow__dot {
  width: 56px; height: 56px; margin: 0 auto var(--sp-4);
  display: flex; align-items: center; justify-content: center;
  background: #fff;
  border: 2px solid var(--brand-100);
  border-radius: 50%;
  color: var(--brand-600);
  box-shadow: var(--sh-sm);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), color var(--dur) var(--ease);
}
.flow__step:hover .flow__dot { transform: translateY(-4px) scale(1.05); border-color: var(--brand-500); color: var(--brand-500); }
.flow__step h4 { font-size: 1.02rem; margin-bottom: 6px; }
.flow__step p { font-size: .86rem; color: var(--ink-500); line-height: 1.6; margin: 0; }
.flow__idx {
  display: block; font-family: var(--font-mono); font-size: .72rem; font-weight: 600;
  letter-spacing: .12em; color: var(--brand-400); margin-bottom: 6px;
}

/* — 合作模式 — */
.model-card { display: flex; gap: var(--sp-5); align-items: flex-start; }
.model-card .num-tag { flex: none; margin-top: 2px; }
.model-card h4 { margin-bottom: 6px; }
.model-card p { margin: 0; font-size: .92rem; color: var(--ink-500); }

/* — 三方共赢 — */
.winwin { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--sp-5); }
.winwin__col {
  background: #fff; border: 1px solid var(--line); border-radius: var(--r-lg);
  padding: var(--sp-6); position: relative; overflow: hidden;
}
.winwin__col::after {
  content: ''; position: absolute; right: -40px; top: -40px; width: 130px; height: 130px;
  border-radius: 50%; background: var(--brand-050);
}
.winwin__head { display: flex; align-items: center; gap: 12px; margin-bottom: var(--sp-5); position: relative; }
.winwin__head h4 { margin: 0; font-size: 1.12rem; }
.winwin__col--school .icon-box { background: rgba(18,102,224,.10); color: var(--brand-600); }
.winwin__col--corp .icon-box { background: rgba(15,166,216,.10); color: var(--c-low); }
.winwin__col--stu .icon-box { background: rgba(15,168,147,.10); color: var(--c-ic); }

/* — 案例 — */
.case-card {
  display: flex; flex-direction: column;
  background: #fff; border: 1px solid var(--line); border-radius: var(--r-lg);
  overflow: hidden;
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.case-card:hover { transform: translateY(-4px); box-shadow: var(--sh-lg); }
.case-card__top {
  padding: var(--sp-5) var(--sp-6);
  background: var(--navy-900);
  color: #fff;
  display: flex; align-items: center; justify-content: space-between; gap: var(--sp-4);
  min-height: 96px;
}
.case-card__top--low { background: linear-gradient(120deg, #06304A 0%, #0A4E6B 100%); }
.case-card__top--ai  { background: linear-gradient(120deg, #101C4E 0%, #22307C 100%); }
.case-card__top--ic  { background: linear-gradient(120deg, #063B34 0%, #0A5C50 100%); }
.case-card__dir { font-size: .72rem; letter-spacing: .16em; text-transform: uppercase; opacity: .78; font-weight: 600; }
.case-card__org { font-size: 1.06rem; font-weight: 700; margin-top: 6px; }
.case-card__body { padding: var(--sp-6); flex: 1; }
.case-card__body p { color: var(--ink-500); font-size: .94rem; margin-bottom: var(--sp-5); }
.case-card__tags { display: flex; flex-wrap: wrap; gap: 8px; }

/* — CTA 横幅 — */
.cta-band {
  position: relative; overflow: hidden;
  background: linear-gradient(120deg, var(--navy-900) 0%, #0B2B52 55%, #0E3E70 100%);
  color: #C6D4E6;
  border-radius: var(--r-xl);
  padding: clamp(40px, 3rem + 3vw, 72px);
}
.cta-band__grid {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(120,170,255,.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(120,170,255,.06) 1px, transparent 1px);
  background-size: 52px 52px;
  mask-image: radial-gradient(90% 100% at 85% 50%, #000, transparent 75%);
  -webkit-mask-image: radial-gradient(90% 100% at 85% 50%, #000, transparent 75%);
}
.cta-band__inner { position: relative; display: grid; grid-template-columns: 1.6fr auto; gap: var(--sp-7); align-items: center; }
.cta-band h2 { color: #fff; margin-bottom: var(--sp-4); }
.cta-band p { color: #A9BDD6; font-size: var(--fs-lead); margin: 0; max-width: 56ch; }
.cta-band__actions { display: flex; flex-wrap: wrap; gap: var(--sp-4); }

/* 区块分隔的网格背景 */
.bg-grid {
  position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(18,102,224,.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(18,102,224,.045) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(100% 70% at 50% 0%, #000, transparent 78%);
  -webkit-mask-image: radial-gradient(100% 70% at 50% 0%, #000, transparent 78%);
}

/* ---------------------------------------------------------------
   8. 内页通用模块
   --------------------------------------------------------------- */

/* — 内页 Hero — */
.page-hero {
  position: relative; overflow: hidden;
  background: var(--navy-950);
  color: #C6D4E6;
  padding-block: clamp(56px, 4rem + 3vw, 96px) clamp(64px, 4rem + 4vw, 112px);
}
.page-hero__bg { position: absolute; inset: 0; pointer-events: none; }
.page-hero__inner { position: relative; z-index: 2; display: grid; grid-template-columns: 1.1fr .9fr; gap: var(--sp-8); align-items: center; }
.page-hero h1 { color: #fff; font-size: var(--fs-h1); margin-bottom: var(--sp-4); }
.page-hero .breadcrumb { color: #7E96B8; margin-bottom: var(--sp-5); }
.page-hero .breadcrumb a { color: #7E96B8; }
.page-hero .breadcrumb a:hover { color: #fff; }
.page-hero .breadcrumb .sep { color: #4F688B; }
.page-hero__lead { font-size: var(--fs-lead); color: #A9BDD6; max-width: 58ch; }
.page-hero__art { width: 100%; opacity: .95; }
.page-hero--low { --ph-a: #0FA6D8; }
.page-hero--ai  { --ph-a: #4364F0; }
.page-hero--ic  { --ph-a: #0FA893; }

/* — 图文分栏 — */
.split { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(32px, 3vw + 12px, 72px); align-items: center; }
.split--media-right .split__media { order: 2; }
.split__media {
  border-radius: var(--r-lg);
  border: 1px solid var(--line);
  background: var(--bg-soft);
  overflow: hidden;
}

/* 数据面板 */
.panel {
  background: #fff; border: 1px solid var(--line); border-radius: var(--r-lg);
  padding: var(--sp-6);
}
.panel--dark { background: var(--navy-850); border-color: rgba(255,255,255,.08); color: #C6D4E6; }
.panel--dark h4 { color: #fff; }
.panel__label { font-size: .78rem; letter-spacing: .12em; text-transform: uppercase; color: var(--ink-400); font-weight: 600; margin-bottom: var(--sp-2); }
.panel--dark .panel__label { color: #7E96B8; }

/* 指标格 */
.metric-row { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--r-md); overflow: hidden; }
.metric-row > div { background: #fff; padding: var(--sp-5); }
.metric-row .stat__num { font-size: 1.7rem; }

/* 编号列表块 */
.step-list { display: grid; gap: var(--sp-3); }
.step {
  display: flex; gap: var(--sp-4); align-items: flex-start;
  padding: var(--sp-5);
  background: #fff; border: 1px solid var(--line); border-radius: var(--r-md);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.step:hover { border-color: var(--brand-100); box-shadow: var(--sh-sm); }
.step h4 { margin: 0 0 4px; font-size: 1.02rem; }
.step p { margin: 0; font-size: .9rem; color: var(--ink-500); }

/* 特性小卡 */
.feat {
  padding: var(--sp-5);
  background: #fff; border: 1px solid var(--line); border-radius: var(--r-md);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.feat:hover { transform: translateY(-3px); box-shadow: var(--sh-md); }
.feat h4 { font-size: 1rem; margin: var(--sp-4) 0 6px; }
.feat p { font-size: .88rem; color: var(--ink-500); margin: 0; }

/* 场景标签墙 */
.scene-wall { display: flex; flex-wrap: wrap; gap: 10px; }
.scene-wall .chip { font-size: .85rem; padding: 8px 15px; }

/* 价格/档位卡 */
.tier {
  position: relative;
  display: flex; flex-direction: column;
  background: #fff; border: 1px solid var(--line); border-radius: var(--r-lg);
  padding: var(--sp-6);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.tier:hover { transform: translateY(-4px); box-shadow: var(--sh-lg); }
.tier--featured { border-color: var(--brand-400); box-shadow: var(--sh-md); }
.tier--featured::after {
  content: '推荐'; position: absolute; top: -1px; right: var(--sp-6);
  padding: 4px 12px; font-size: .72rem; font-weight: 650; color: #fff;
  background: var(--brand-600); border-radius: 0 0 var(--r-xs) var(--r-xs);
}
.tier__name { font-size: 1.15rem; font-weight: 700; color: var(--ink-900); }
.tier__price { margin: var(--sp-3) 0 var(--sp-5); font-size: 1.5rem; font-weight: 750; color: var(--brand-700); letter-spacing: -.02em; }
.tier__price small { font-size: .78rem; font-weight: 500; color: var(--ink-400); letter-spacing: 0; }
.tier__desc { font-size: .9rem; color: var(--ink-500); margin-bottom: var(--sp-5); }

/* — 表单 — */
.form { display: grid; gap: var(--sp-5); }
.form__row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--sp-5); }
.field { display: grid; gap: 8px; }
.field label { font-size: .88rem; font-weight: 600; color: var(--ink-700); }
.field label .req { color: #D64545; }
.field input, .field select, .field textarea {
  width: 100%;
  padding: 12px 14px;
  font-family: inherit; font-size: .95rem; color: var(--ink-800);
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--r-sm);
  transition: border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease);
}
.field textarea { min-height: 130px; resize: vertical; line-height: 1.7; }
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none; border-color: var(--brand-500); box-shadow: 0 0 0 3px rgba(46,134,255,.14);
}
.field input::placeholder, .field textarea::placeholder { color: var(--ink-300); }
.form__note { font-size: .84rem; color: var(--ink-400); }
.form__alert {
  display: none;
  padding: 14px 16px; border-radius: var(--r-sm);
  font-size: .92rem;
  background: rgba(18,160,106,.08);
  border: 1px solid rgba(18,160,106,.25);
  color: #0A7A50;
}
.form__alert.is-show { display: block; }

/* 联系方式条目 */
.contact-item { display: flex; gap: var(--sp-4); align-items: flex-start; }
.contact-item h4 { margin: 0 0 4px; font-size: 1rem; }
.contact-item p { margin: 0; font-size: .93rem; color: var(--ink-500); }
.contact-item a { color: var(--brand-700); }

/* 时间线 */
.timeline { position: relative; padding-left: 34px; }
.timeline::before { content: ''; position: absolute; left: 9px; top: 6px; bottom: 6px; width: 2px; background: var(--line); }
.timeline__item { position: relative; padding-bottom: var(--sp-7); }
.timeline__item:last-child { padding-bottom: 0; }
.timeline__item::before {
  content: ''; position: absolute; left: -33px; top: 6px;
  width: 20px; height: 20px; border-radius: 50%;
  background: #fff; border: 2px solid var(--brand-400);
  box-shadow: 0 0 0 4px var(--brand-050);
}
.timeline__year { font-family: var(--font-mono); font-size: .82rem; font-weight: 600; letter-spacing: .06em; color: var(--brand-600); }
.timeline__item h4 { margin: 4px 0 6px; }
.timeline__item p { margin: 0; font-size: .93rem; color: var(--ink-500); }

/* 锚点侧栏 */
.anchor-nav { display: flex; flex-wrap: wrap; gap: 10px; }

/* 提示条 */
.notice {
  display: flex; gap: 14px; align-items: flex-start;
  padding: var(--sp-5);
  background: var(--brand-050);
  border: 1px solid var(--brand-100);
  border-radius: var(--r-md);
  font-size: .93rem;
  color: var(--ink-600);
}
.notice .icon { color: var(--brand-600); flex: none; margin-top: 2px; }
.notice strong { color: var(--brand-800); }

/* 引用块 */
.quote {
  border-left: 3px solid var(--brand-500);
  padding: 4px 0 4px var(--sp-5);
  font-size: var(--fs-lead);
  color: var(--ink-700);
  font-weight: 500;
  line-height: 1.8;
}

/* ---------------------------------------------------------------
   9. 动效
   --------------------------------------------------------------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity .7s var(--ease-out), transform .7s var(--ease-out);
  will-change: opacity, transform;
}
[data-reveal].is-in { opacity: 1; transform: none; }
[data-reveal][data-delay="1"] { transition-delay: .08s; }
[data-reveal][data-delay="2"] { transition-delay: .16s; }
[data-reveal][data-delay="3"] { transition-delay: .24s; }
[data-reveal][data-delay="4"] { transition-delay: .32s; }
[data-reveal][data-delay="5"] { transition-delay: .40s; }

@keyframes floaty {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}
@keyframes dash {
  to { stroke-dashoffset: -1000; }
}
@keyframes pulse-ring {
  0% { transform: scale(.7); opacity: .8; }
  100% { transform: scale(2.1); opacity: 0; }
}
@keyframes sweep {
  to { transform: rotate(360deg); }
}
.anim-float { animation: floaty 7s var(--ease) infinite; }
.anim-dash { stroke-dasharray: 6 8; animation: dash 26s linear infinite; }

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

/* ---------------------------------------------------------------
   10. 响应式
   --------------------------------------------------------------- */
@media (max-width: 1120px) {
  .nav__link { padding: 9px 11px; font-size: .9rem; }
  .grid--5 { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 1024px) {
  .nav, .header__cta { display: none; }
  .nav-toggle { display: inline-flex; }
  .hero__inner { grid-template-columns: 1fr; }
  .hero__visual { display: none; }
  .page-hero__inner { grid-template-columns: 1fr; }
  .page-hero__art { display: none; }
  .split { grid-template-columns: 1fr; }
  .split--media-right .split__media { order: 0; }
  .footer__grid { grid-template-columns: 1fr 1fr; }
  .flow { grid-template-columns: repeat(3, 1fr); row-gap: var(--sp-6); }
  .flow__line { display: none; }
  .grid--4 { grid-template-columns: repeat(2, 1fr); }
  .trust__row { grid-template-columns: repeat(2, 1fr); }
  .cta-band__inner { grid-template-columns: 1fr; }
}

@media (max-width: 860px) {
  :root { --header-h: 66px; }
  .grid--3 { grid-template-columns: 1fr; }
  .grid--5 { grid-template-columns: repeat(2, 1fr); }
  .winwin { grid-template-columns: 1fr; }
  .hero__stats { grid-template-columns: repeat(2, 1fr); row-gap: var(--sp-6); }
  .metric-row { grid-template-columns: 1fr; }
  .form__row { grid-template-columns: 1fr; }
}

@media (max-width: 620px) {
  .grid--2 { grid-template-columns: 1fr; }
  .grid--4 { grid-template-columns: 1fr; }
  .grid--5 { grid-template-columns: 1fr; }
  .trust__row { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr; }
  .flow { grid-template-columns: 1fr; }
  .hero__actions .btn { width: 100%; }
  .cta-band { border-radius: var(--r-lg); }
  .card--pad-lg, .dir-card { padding: var(--sp-5); }
  .footer__bottom { flex-direction: column; align-items: flex-start; }
}

/* 打印 */
@media print {
  .header, .footer, .cta-band, .mobile-panel { display: none !important; }
  .hero, .page-hero, .section--navy { background: #fff !important; color: #000 !important; }
  body { color: #000; }
}