@import url('https://fonts.googleapis.com/css2?family=Nunito:wght@400;500;600;700;800&family=Noto+Sans+SC:wght@400;500;700&display=swap');

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --or1: #3A52B0;
  --or2: #5B78CC;
  --or3: #8AABD8;
  --or4: #C5D3F2;
  --or5: #EEF2FB;
  --or6: #F5F8FF;
  --dark: #1A2456;
  --mid: #3A4E88;
  --muted: #5A6AA0;
  --border: #D5DDEF;
  --font: 'Nunito', 'Noto Sans SC', sans-serif;
}

html { scroll-behavior: smooth; }
body { font-family: var(--font); background: #fff; color: var(--dark); overflow-x: hidden; }
a { text-decoration: none; color: inherit; }
img { max-width: 100%; height: auto; display: block; }
button { font-family: var(--font); cursor: pointer; }

/* Animations */
@keyframes fadeUp  { from { opacity:0; transform:translateY(28px) } to { opacity:1; transform:translateY(0) } }
@keyframes fadeIn  { from { opacity:0 } to { opacity:1 } }
@keyframes float   { 0%,100%{transform:translateY(0)} 50%{transform:translateY(-8px)} }
@keyframes pulse   { 0%,100%{opacity:1} 50%{opacity:0.45} }

.reveal { opacity:0; transform:translateY(24px); transition: opacity .65s ease, transform .65s ease; }
.reveal.visible { opacity:1; transform:translateY(0); }
.reveal-d1 { transition-delay:.1s }
.reveal-d2 { transition-delay:.2s }
.reveal-d3 { transition-delay:.3s }

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

/* Buttons */
.btn-primary {
  display:inline-flex; align-items:center; gap:6px;
  font-size:14px; font-weight:700; background:var(--or1); color:#fff;
  padding:12px 26px; border-radius:10px; border:none; transition:all .18s;
}
.btn-primary:hover { background:#2d4299; transform:translateY(-2px); box-shadow:0 6px 20px rgba(58,82,176,.32); }

.btn-ghost {
  display:inline-flex; align-items:center; gap:6px;
  font-size:14px; font-weight:700; background:transparent; color:var(--or1);
  padding:12px 26px; border-radius:10px; border:2px solid var(--or3); transition:all .18s;
}
.btn-ghost:hover { border-color:var(--or1); background:var(--or5); transform:translateY(-2px); }

.btn-white {
  display:inline-flex; align-items:center; gap:6px;
  font-size:14px; font-weight:800; background:#fff; color:var(--or1);
  padding:12px 28px; border-radius:10px; border:none; transition:all .18s;
}
.btn-white:hover { transform:translateY(-2px); box-shadow:0 6px 20px rgba(0,0,0,.12); }

.btn-outline-white {
  display:inline-flex; align-items:center; gap:6px;
  font-size:14px; font-weight:700; background:transparent; color:#fff;
  padding:12px 28px; border-radius:10px; border:2px solid rgba(255,255,255,.5); transition:all .18s;
}
.btn-outline-white:hover { background:rgba(255,255,255,.12); border-color:rgba(255,255,255,.9); }

/* 键盘可达：CTA 按钮聚焦环（浅底用蓝、深底用白） */
.btn-primary:focus-visible, .btn-ghost:focus-visible { outline:2px solid var(--or1); outline-offset:2px; }
.btn-white:focus-visible, .btn-outline-white:focus-visible { outline:2px solid #fff; outline-offset:2px; }

/* Section helpers */
.section-wrap { padding:80px 2.5rem; }
.section-wrap.alt { background:var(--or6); border-top:1px solid var(--border); border-bottom:1px solid var(--border); }
.section-inner { max-width:1240px; margin:0 auto; }
.section-header { margin-bottom:48px; }

.sec-eyebrow {
  display:inline-flex; align-items:center; gap:8px;
  font-size:11px; font-weight:700; color:var(--or2);
  letter-spacing:1.5px; text-transform:uppercase; margin-bottom:12px;
}
.sec-eyebrow::before { content:''; width:20px; height:2px; background:var(--or2); border-radius:1px; flex-shrink:0; }

.section-title { font-size:32px; font-weight:800; letter-spacing:-1px; color:var(--dark); margin-bottom:10px; line-height:1.2; }
.section-sub { font-size:15px; color:var(--muted); font-weight:500; }
.chip { font-size:11px; font-weight:600; padding:4px 10px; border-radius:6px; background:var(--or5); color:var(--or1); border:1px solid var(--or4); }

/* Page banner */
.page-banner { background:linear-gradient(135deg,var(--or1),var(--or2)); padding:72px 2.5rem 64px; position:relative; overflow:hidden; }
.page-banner::before { content:''; position:absolute; top:-100px; right:-100px; width:500px; height:500px; border-radius:50%; background:rgba(255,255,255,.05); pointer-events:none; }
/* 科技点阵网格：白色点叠在蓝色渐变 Banner 上，边缘渐隐，与首页 Hero 同款语言 */
.page-banner::after {
  content:''; position:absolute; inset:0; z-index:0; pointer-events:none;
  background-image:radial-gradient(rgba(255,255,255,.14) 1px, transparent 1px);
  background-size:26px 26px;
  -webkit-mask-image:radial-gradient(ellipse 80% 75% at 70% 30%, #000 25%, transparent 78%);
  mask-image:radial-gradient(ellipse 80% 75% at 70% 30%, #000 25%, transparent 78%);
}
.page-banner-inner { max-width:1240px; margin:0 auto; position:relative; z-index:1; }
.page-banner h1 { font-size:42px; font-weight:800; color:#fff; letter-spacing:-1.5px; margin-bottom:12px; }
.page-banner p { font-size:16px; color:rgba(255,255,255,.78); font-weight:500; max-width:560px; }
.breadcrumb { display:flex; align-items:center; gap:8px; margin-bottom:16px; }
.breadcrumb a, .breadcrumb span { font-size:13px; color:rgba(255,255,255,.6); font-weight:500; transition:color .15s; }
.breadcrumb a:hover { color:#fff; }
.breadcrumb .sep { font-size:11px; opacity:.4; }

/* Scroll to top */
.scroll-top {
  position:fixed; bottom:28px; right:28px; width:44px; height:44px; border-radius:50%;
  background:var(--or1); color:#fff; border:none; font-size:18px;
  display:flex; align-items:center; justify-content:center;
  box-shadow:0 4px 16px rgba(58,82,176,.4); opacity:0; transform:translateY(12px); transition:all .3s; z-index:999;
}
.scroll-top.visible { opacity:1; transform:translateY(0); }
.scroll-top:hover { background:#2d4299; transform:translateY(-2px); }

/* ── RESPONSIVE ── */
@media (max-width: 768px) {
  .section-wrap { padding: 52px 1.25rem; }
  .section-title { font-size: 24px; letter-spacing: -.5px; }
  .section-header { margin-bottom: 32px; }
  .page-banner { padding: 48px 1.25rem 44px; }
  .page-banner h1 { font-size: 28px; letter-spacing: -.5px; }
  .page-banner p { font-size: 14px; }
  .breadcrumb { flex-wrap: wrap; gap: 6px; }
  .btn-primary, .btn-ghost, .btn-white, .btn-outline-white { font-size: 13px; padding: 11px 20px; }
}

/* ── 内联 SVG 图标（替代原 emoji，尺寸跟随容器字号）── */
.e-ico { display:inline-block; width:1em; height:1em; vertical-align:-0.14em; flex-shrink:0; }