/* ============================================================
   英哲数科官网 复用样式表（二级页基础）
   视觉令牌直接取自官网 style.css :root，组件结构按官网还原
   主深蓝 #0E3A66 / 青绿点缀 #00A3B4 / 琥珀强调 #E8A33D
   ============================================================ */

:root {
  --c-primary: #0E3A66;
  --c-primary-light: #1B5A94;
  --c-primary-deep: #0A2B4C;
  --c-accent: #00A3B4;
  --c-accent-soft: rgba(0, 163, 180, .10);
  --c-emphasis: #E8A33D;
  --c-bg: #FFFFFF;
  --c-bg-alt: #F4F7FA;
  --c-text: #1F2937;
  --c-text-2: #6B7280;
  --c-line: #E5E9F0;
  --c-white: #FFFFFF;

  --font-num: "Bahnschrift", "DIN Alternate", "Franklin Gothic Medium", "Arial Narrow", sans-serif;
  --font-body: "PingFang SC", "Microsoft YaHei UI", "Microsoft YaHei", "Source Han Sans SC", sans-serif;

  --shadow-sm: 0 1px 3px rgba(14, 58, 102, .08);
  --shadow-md: 0 6px 24px -8px rgba(14, 58, 102, .16);
  --shadow-lg: 0 16px 48px -12px rgba(14, 58, 102, .22);
  --radius: 10px;
  --radius-lg: 16px;
  --container: 1200px;
  --ease: cubic-bezier(.22, .8, .32, 1);
}

/* ---------- 基础重置 ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.75;
  color: var(--c-text);
  background: var(--c-bg);
  -webkit-font-smoothing: antialiased;
}
img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }
button { font: inherit; cursor: pointer; border: none; background: none; }
.num, .stat .n { font-family: var(--font-num); font-variant-numeric: tabular-nums; }

.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.section { padding: 84px 0; }
.section.alt { background: var(--c-bg-alt); }
.section-head { text-align: center; max-width: 760px; margin: 0 auto 52px; }
.eyebrow {
  display: inline-block; font-size: 13px; font-weight: 700; letter-spacing: .14em;
  color: var(--c-accent); text-transform: uppercase; margin-bottom: 14px;
  padding: 4px 14px; border: 1px solid var(--c-accent-soft); border-radius: 999px;
  background: var(--c-accent-soft);
}
.section-head h2 {
  font-size: 32px; line-height: 1.3; color: var(--c-primary-deep); font-weight: 800;
  letter-spacing: -.01em;
}
.sec-desc { margin-top: 14px; color: var(--c-text-2); font-size: 16px; }

/* ---------- 顶部工具条 ---------- */
.topbar {
  background: var(--c-primary-deep);
  color: rgba(255,255,255,.82);
  font-size: 13px;
}
.topbar-inner {
  max-width: var(--container); margin: 0 auto; padding: 8px 24px;
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
}
.topbar-brand { display: flex; align-items: center; gap: 10px; font-weight: 600; color: #fff; }
.topbar-logo {
  width: 22px; height: 22px; border-radius: 6px;
  background: linear-gradient(135deg, var(--c-accent), var(--c-primary-light));
  display: grid; place-items: center; color: #fff; font-weight: 800; font-size: 12px;
}
.topbar-slogan { color: rgba(255,255,255,.6); }
.topbar-actions { display: flex; align-items: center; gap: 18px; }
.topbar-wechat { display: inline-flex; align-items: center; gap: 6px; color: rgba(255,255,255,.82); }
.topbar-wechat::before { content: "微信"; font-size: 12px; padding: 2px 8px; border-radius: 6px; background: rgba(255,255,255,.12); }

/* ---------- 主导航（白底吸顶） ---------- */
.mainnav {
  position: sticky; top: 0; z-index: 50;
  background: var(--c-white);
  border-bottom: 1px solid var(--c-line);
  box-shadow: var(--shadow-sm);
}
.mainnav-inner {
  max-width: var(--container); margin: 0 auto; padding: 0 24px;
  height: 64px; display: flex; align-items: center; justify-content: space-between; gap: 24px;
}
.mainnav .brand { display: flex; align-items: center; gap: 10px; }
.mainnav .brand .logo {
  width: 34px; height: 34px; border-radius: 9px;
  background: linear-gradient(135deg, var(--c-primary), var(--c-primary-light));
  display: grid; place-items: center; color: #fff; font-weight: 800; font-size: 15px;
}
.mainnav .brand .name { font-size: 18px; font-weight: 800; color: var(--c-primary-deep); letter-spacing: -.01em; }
.mainnav .brand .sub { font-size: 12px; color: var(--c-text-2); }
.mainnav-links { display: flex; align-items: center; gap: 4px; }
.mainnav-links a {
  position: relative; padding: 10px 14px; font-size: 15px; color: var(--c-text);
  border-radius: 8px; transition: color .2s, background .2s;
}
.mainnav-links a:hover { color: var(--c-primary); background: var(--c-bg-alt); }
.mainnav-links a.active { color: var(--c-primary); font-weight: 700; }
.mainnav-links a.active::after {
  content: ""; position: absolute; left: 14px; right: 14px; bottom: -1px; height: 3px;
  background: var(--c-accent); border-radius: 3px;
}
.mainnav-cta {
  padding: 9px 18px; border-radius: 999px; background: var(--c-accent); color: #fff;
  font-weight: 700; font-size: 14px; transition: transform .2s, box-shadow .2s;
}
.mainnav-cta:hover { transform: translateY(-1px); box-shadow: var(--shadow-md); }

/* ---------- 面包屑 ---------- */
.breadcrumb {
  font-size: 13px; color: rgba(255,255,255,.72); margin-bottom: 22px;
  display: flex; flex-wrap: wrap; gap: 8px; align-items: center;
}
.breadcrumb a { color: rgba(255,255,255,.82); }
.breadcrumb a:hover { color: #fff; text-decoration: underline; }
.breadcrumb .sep { opacity: .5; }
.breadcrumb .cur { color: #fff; font-weight: 600; }

/* ---------- 页面 Hero（深蓝渐变 + 网格肌理 + 青绿光晕） ---------- */
.page-hero {
  position: relative; overflow: hidden;
  background:
    radial-gradient(900px 420px at 88% 120%, rgba(0,163,180,.34), transparent 60%),
    linear-gradient(135deg, var(--c-primary-deep) 0%, var(--c-primary) 52%, var(--c-primary-light) 100%);
  color: #fff;
}
.page-hero::before {
  content: ""; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.06) 1px, transparent 1px);
  background-size: 48px 48px;
  -webkit-mask-image: radial-gradient(120% 90% at 70% 10%, #000 30%, transparent 75%);
          mask-image: radial-gradient(120% 90% at 70% 10%, #000 30%, transparent 75%);
  pointer-events: none;
}
.page-hero::after {
  content: ""; position: absolute; right: -80px; bottom: -120px; width: 420px; height: 420px;
  background: radial-gradient(circle, rgba(0,163,180,.45), transparent 65%);
  filter: blur(8px); pointer-events: none;
}
.page-hero .inner { position: relative; z-index: 1; max-width: var(--container); margin: 0 auto; padding: 72px 24px 84px; }
.page-hero-grid { display: grid; grid-template-columns: 1.35fr .9fr; gap: 48px; align-items: center; }
.page-hero-text h1 {
  font-size: 42px; line-height: 1.25; font-weight: 800; letter-spacing: -.01em;
  margin-bottom: 18px; max-width: 16em;
}
.page-hero-text .sub { font-size: 17px; line-height: 1.8; color: rgba(255,255,255,.86); max-width: 38em; margin-bottom: 30px; }
.tagline { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 34px; }
.tagline .tag {
  font-size: 13px; padding: 6px 14px; border-radius: 999px;
  background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.22); color: #fff;
  backdrop-filter: blur(2px);
}
.tagline .tag.em { background: var(--c-emphasis); border-color: var(--c-emphasis); color: #3a2a06; font-weight: 700; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; }
.hero-stats {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px;
  background: rgba(255,255,255,.10); border: 1px solid rgba(255,255,255,.18);
  border-radius: var(--radius-lg); padding: 26px; backdrop-filter: blur(4px);
}
.hero-stats .stat { text-align: left; }
.hero-stats .n { font-family: var(--font-num); font-size: 36px; font-weight: 700; line-height: 1; color: #fff; }
.hero-stats .n .u { font-size: 16px; opacity: .8; margin-left: 2px; }
.hero-stats .l { font-size: 13px; color: rgba(255,255,255,.78); margin-top: 8px; }
.hero-stats .arrow { display: inline-block; margin: 0 6px; color: var(--c-accent); font-weight: 700; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 13px 26px; border-radius: 999px; font-weight: 700; font-size: 15px;
  transition: transform .2s, box-shadow .2s, background .2s; white-space: nowrap;
}
.btn-primary { background: var(--c-primary); color: #fff; box-shadow: var(--shadow-sm); }
.btn-primary:hover { background: var(--c-primary-deep); transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-accent { background: var(--c-accent); color: #fff; box-shadow: var(--shadow-sm); }
.btn-accent:hover { transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-emphasis { background: var(--c-emphasis); color: #3a2a06; }
.btn-emphasis:hover { transform: translateY(-1px); box-shadow: var(--shadow-md); }
.btn-ghost { background: rgba(255,255,255,.12); color: #fff; border: 1px solid rgba(255,255,255,.3); }
.btn-ghost:hover { background: rgba(255,255,255,.2); }
.btn-lg { padding: 16px 34px; font-size: 16px; }
.btn-sm { padding: 9px 18px; font-size: 14px; }

/* ---------- 通用卡片 ---------- */
.card {
  background: var(--c-white); border: 1px solid var(--c-line); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm); padding: 28px; transition: transform .25s var(--ease), box-shadow .25s var(--ease);
}
.card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }

/* ---------- 页脚 ---------- */
.footer { background: var(--c-primary-deep); color: rgba(255,255,255,.8); padding: 64px 0 28px; }
.footer-main { max-width: var(--container); margin: 0 auto; padding: 0 24px;
  display: grid; grid-template-columns: 1.6fr 1fr 1fr 1.2fr; gap: 40px; }
.footer .f-brand .logo {
  width: 38px; height: 38px; border-radius: 10px;
  background: linear-gradient(135deg, var(--c-accent), var(--c-primary-light));
  display: grid; place-items: center; color: #fff; font-weight: 800; margin-bottom: 14px;
}
.footer .f-brand .name { font-size: 18px; font-weight: 800; color: #fff; }
.footer .f-brand p { margin-top: 12px; font-size: 14px; color: rgba(255,255,255,.6); max-width: 30em; }
.footer-col h4 { font-size: 15px; color: #fff; margin-bottom: 16px; font-weight: 700; }
.footer-col a { display: block; font-size: 14px; color: rgba(255,255,255,.72); padding: 6px 0; transition: color .2s; }
.footer-col a:hover { color: var(--c-accent); }
.footer-contact { font-size: 14px; line-height: 2; }
.footer-contact .row { display: flex; gap: 10px; align-items: flex-start; }
.footer-contact .k { color: rgba(255,255,255,.55); min-width: 4em; }
.footer-bottom {
  max-width: var(--container); margin: 40px auto 0; padding: 20px 24px 0;
  border-top: 1px solid rgba(255,255,255,.12);
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 12px;
  font-size: 13px; color: rgba(255,255,255,.55);
}

/* ---------- 响应式 ---------- */
@media (max-width: 1024px) {
  .page-hero-grid { grid-template-columns: 1fr; gap: 32px; }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .footer-main { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .mainnav-links { display: none; }
  .page-hero-text h1 { font-size: 30px; }
  .section { padding: 56px 0; }
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .hero-stats { grid-template-columns: 1fr 1fr; }
  .footer-main { grid-template-columns: 1fr; }
}