/* ============ 智昇未来官网 - 全局样式 ============ */
:root {
  --brand-blue: #3B6FE0;
  --brand-purple: #6B3FA0;
  --brand-deep: #4A3FA0;
  --grad-main: linear-gradient(135deg, #4A90D9 0%, #6B3FA0 100%);
  --grad-hero: linear-gradient(140deg, #3B6FE0 0%, #5B4FC9 45%, #6B3FA0 100%);
  --gold: #F0C040;
  --ink: #1F2937;
  --ink-soft: #4B5563;
  --ink-faint: #6B7280;
  --bg: #FFFFFF;
  --bg-soft: #F5F7FA;
  --line: #E8EBF0;
  --shadow-sm: 0 2px 8px rgba(30, 40, 90, 0.06);
  --shadow-md: 0 8px 28px rgba(30, 40, 90, 0.10);
  --shadow-lg: 0 16px 48px rgba(40, 45, 120, 0.16);
  --radius: 16px;
}

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

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

body {
  font-family: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Segoe UI", sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

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

/* 容器 */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ============ 顶部导航 ============ */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  height: 72px;
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  transition: box-shadow .3s ease;
}
.site-header.scrolled { box-shadow: var(--shadow-sm); }

.nav-wrap {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}
.nav-brand img { width: 40px; height: 40px; border-radius: 9px; box-shadow: var(--shadow-sm); }
.nav-brand .brand-name { font-size: 19px; font-weight: 700; letter-spacing: 1px; color: var(--ink); }
.nav-brand .brand-name em { font-style: normal; color: var(--brand-blue); }

.nav-menu { display: flex; align-items: center; gap: 6px; }
.nav-menu a {
  position: relative;
  padding: 8px 16px;
  font-size: 15px;
  color: var(--ink-soft);
  border-radius: 8px;
  transition: color .2s, background .2s;
}
.nav-menu a:hover { color: var(--brand-blue); background: rgba(59, 111, 224, 0.06); }
.nav-menu a.active { color: var(--brand-blue); font-weight: 600; }
.nav-menu a.active::after {
  content: "";
  position: absolute;
  left: 16px; right: 16px; bottom: 2px;
  height: 3px;
  border-radius: 2px;
  background: var(--grad-main);
}

.nav-right { display: flex; align-items: center; gap: 16px; }
.nav-phone { display: flex; align-items: center; gap: 8px; font-size: 15px; font-weight: 600; color: var(--ink); }
.nav-phone .ph-icon {
  width: 34px; height: 34px;
  display: inline-flex; align-items: center; justify-content: center;
  border-radius: 50%;
  background: var(--grad-main);
  color: #fff;
  font-size: 16px;
}

/* 按钮 */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  font-size: 16px;
  font-weight: 600;
  border-radius: 999px;
  border: none;
  cursor: pointer;
  transition: transform .2s, box-shadow .2s, background .2s;
  white-space: nowrap;
}
.btn-primary {
  color: #fff;
  background: var(--grad-main);
  box-shadow: 0 8px 22px rgba(90, 80, 200, 0.32);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 12px 30px rgba(90, 80, 200, 0.42); }
.btn-ghost {
  color: #fff;
  background: rgba(255, 255, 255, 0.14);
  border: 1.5px solid rgba(255, 255, 255, 0.55);
}
.btn-ghost:hover { background: rgba(255, 255, 255, 0.24); }
.btn-light {
  color: var(--brand-blue);
  background: #fff;
  box-shadow: 0 8px 22px rgba(20, 20, 80, 0.28);
}
.btn-light:hover { transform: translateY(-2px); box-shadow: 0 12px 30px rgba(20, 20, 80, 0.36); }
.btn-outline {
  color: var(--brand-blue);
  background: #fff;
  border: 1.5px solid var(--brand-blue);
}
.btn-outline:hover { background: rgba(59, 111, 224, 0.06); }
.btn-lg { padding: 15px 40px; font-size: 17px; }

/* ============ Hero ============ */
.hero {
  position: relative;
  min-height: 92vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 140px 24px 110px;
  background: var(--grad-hero);
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 60% 45% at 18% 20%, rgba(255,255,255,0.14), transparent 60%),
    radial-gradient(ellipse 55% 50% at 82% 72%, rgba(240,192,64,0.16), transparent 60%);
  pointer-events: none;
}
.hero-deco {
  position: absolute;
  border-radius: 50%;
  background: rgba(255,255,255,0.06);
  pointer-events: none;
}
.hero-deco.d1 { width: 340px; height: 340px; top: -80px; right: -60px; }
.hero-deco.d2 { width: 220px; height: 220px; bottom: -40px; left: -50px; }

.hero-inner { position: relative; z-index: 2; max-width: 820px; }

.hero-logo {
  width: 92px; height: 92px;
  margin: 0 auto 30px;
  border-radius: 22px;
  box-shadow: 0 12px 40px rgba(20, 20, 80, 0.35);
  border: 2px solid rgba(255,255,255,0.5);
}

.hero-kicker {
  display: inline-block;
  padding: 7px 18px;
  margin-bottom: 22px;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 2px;
  color: #fff;
  background: rgba(255,255,255,0.16);
  border: 1px solid rgba(255,255,255,0.3);
  border-radius: 999px;
}

.hero h1 {
  font-size: clamp(40px, 6.5vw, 68px);
  font-weight: 800;
  letter-spacing: 4px;
  color: #fff;
  line-height: 1.18;
  text-shadow: 0 4px 24px rgba(20, 20, 80, 0.25);
}
.hero h1 .accent { color: var(--gold); }

.hero .hero-sub {
  margin-top: 22px;
  font-size: clamp(17px, 2.4vw, 22px);
  color: rgba(255,255,255,0.92);
  font-weight: 400;
  letter-spacing: 1px;
}

.hero .hero-en {
  margin-top: 14px;
  font-size: 15px;
  letter-spacing: 3px;
  color: rgba(255,255,255,0.72);
  text-transform: uppercase;
  font-family: "Segoe UI", -apple-system, sans-serif;
}

.hero-actions {
  margin-top: 42px;
  display: flex;
  gap: 16px;
  justify-content: center;
  flex-wrap: wrap;
}

.hero-scroll {
  position: absolute;
  bottom: 34px; left: 50%;
  transform: translateX(-50%);
  color: rgba(255,255,255,0.7);
  font-size: 13px;
  letter-spacing: 2px;
  animation: floatY 2.2s ease-in-out infinite;
}
@keyframes floatY {
  0%, 100% { transform: translate(-50%, 0); }
  50% { transform: translate(-50%, -8px); }
}

/* ============ 通用 section ============ */
.section { padding: 88px 0; }
.section-soft { background: var(--bg-soft); }

.section-head { text-align: center; max-width: 720px; margin: 0 auto 56px; }
.section-head .kicker {
  display: inline-block;
  font-size: 14px;
  font-weight: 600;
  letter-spacing: 3px;
  color: var(--brand-blue);
  margin-bottom: 14px;
}
.section-head h2 {
  font-size: clamp(28px, 4vw, 40px);
  font-weight: 800;
  letter-spacing: 1px;
  color: var(--ink);
}
.section-head p {
  margin-top: 16px;
  font-size: 16px;
  color: var(--ink-faint);
}

/* ============ 产品/服务卡片 ============ */
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 34px 30px;
  transition: transform .25s, box-shadow .25s, border-color .25s;
}
.card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
  border-color: transparent;
}
.card-icon {
  width: 58px; height: 58px;
  display: flex; align-items: center; justify-content: center;
  font-size: 28px;
  border-radius: 15px;
  margin-bottom: 22px;
  background: var(--grad-main);
  color: #fff;
  box-shadow: 0 6px 16px rgba(90, 80, 200, 0.28);
}
.card h3 { font-size: 20px; font-weight: 700; margin-bottom: 12px; color: var(--ink); }
.card p { font-size: 15px; color: var(--ink-faint); }
.card .card-link {
  display: inline-flex; align-items: center; gap: 6px;
  margin-top: 20px;
  font-size: 15px; font-weight: 600;
  color: var(--brand-blue);
}
.card .card-link:hover { gap: 10px; }

/* ============ 关于我们区块 ============ */
.about-block {
  display: grid;
  grid-template-columns: 1.05fr 0.95fr;
  gap: 56px;
  align-items: center;
}
.about-text h2 {
  font-size: clamp(28px, 4vw, 38px);
  font-weight: 800;
  color: var(--ink);
  margin-bottom: 24px;
}
.about-text p {
  font-size: 16px;
  color: var(--ink-soft);
  margin-bottom: 16px;
}
.about-visual {
  position: relative;
  border-radius: 20px;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  background: var(--grad-main);
  min-height: 340px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 18px;
  color: #fff;
  padding: 40px;
  text-align: center;
}
.about-visual .big-en {
  font-size: 30px;
  font-weight: 700;
  letter-spacing: 2px;
}
.about-visual .big-cn { font-size: 20px; opacity: 0.92; }
.about-visual .big-quote { font-size: 15px; opacity: 0.78; margin-top: 6px; }

/* ============ 数据条 ============ */
.stat-bar {
  background: var(--grad-main);
  border-radius: 20px;
  padding: 44px 40px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  color: #fff;
  box-shadow: var(--shadow-lg);
}
.stat-item { text-align: center; }
.stat-item .num { font-size: 38px; font-weight: 800; letter-spacing: 1px; }
.stat-item .num small { font-size: 18px; font-weight: 600; margin-left: 2px; }
.stat-item .label { margin-top: 6px; font-size: 14px; opacity: 0.88; }

/* ============ 页脚 ============ */
.site-footer {
  background: #1E1B3A;
  color: rgba(255,255,255,0.78);
  padding: 64px 0 28px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1.2fr;
  gap: 40px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
}
.footer-brand img { width: 52px; height: 52px; border-radius: 12px; margin-bottom: 16px; }
.footer-brand .fb-name { font-size: 20px; font-weight: 700; color: #fff; margin-bottom: 10px; }
.footer-brand p { font-size: 14px; line-height: 1.8; }

.footer-col h4 { font-size: 15px; font-weight: 700; color: #fff; margin-bottom: 18px; }
.footer-col a, .footer-col li { display: block; font-size: 14px; margin-bottom: 12px; color: rgba(255,255,255,0.7); transition: color .2s; }
.footer-col a:hover { color: #fff; }

.footer-contact li { display: flex; align-items: flex-start; gap: 10px; font-size: 14px; margin-bottom: 14px; line-height: 1.6; }

.footer-bottom {
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 13px;
  color: rgba(255,255,255,0.68);
}
.footer-bottom a { color: rgba(255,255,255,0.68); }
.footer-bottom a:hover { color: #fff; }

/* ============ 内页 Hero（小号） ============ */
.page-hero {
  position: relative;
  padding: 150px 24px 80px;
  text-align: center;
  background: var(--grad-hero);
  overflow: hidden;
}
.page-hero::before {
  content: "";
  position: absolute; inset: 0;
  background: radial-gradient(ellipse 50% 50% at 50% 0%, rgba(255,255,255,0.12), transparent 65%);
}
.page-hero h1 { position: relative; font-size: clamp(32px, 5vw, 46px); font-weight: 800; letter-spacing: 3px; color: #fff; }
.page-hero .crumb { position: relative; margin-top: 14px; font-size: 14px; color: rgba(255,255,255,0.75); letter-spacing: 1px; }
.page-hero .crumb a { color: rgba(255,255,255,0.85); }
.page-hero .crumb a:hover { color: #fff; }

/* ============ 产品详情页 ============ */
.product-hero {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  padding: 40px 0;
}
.product-hero .ph-text h2 { font-size: clamp(26px, 3.6vw, 36px); font-weight: 800; margin-bottom: 20px; }
.product-hero .ph-text p { font-size: 16px; color: var(--ink-soft); margin-bottom: 14px; }
.product-hero .ph-visual {
  border-radius: 20px;
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  aspect-ratio: 4 / 3;
  background: var(--grad-main);
}
.product-hero .ph-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}
.feature-list { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 40px; }
.feature-item {
  display: flex; gap: 16px; align-items: flex-start;
  padding: 22px;
  background: #fff;
  border: 1px solid var(--line);
  border-radius: 14px;
}
.feature-item .fi-icon { font-size: 24px; flex-shrink: 0; }
.feature-item .fi-title { font-weight: 700; font-size: 16px; margin-bottom: 6px; }
.feature-item .fi-desc { font-size: 14px; color: var(--ink-faint); }

/* ============ 联系页 ============ */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.contact-card {
  background: #fff;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 40px;
}
.contact-card h3 { font-size: 22px; font-weight: 700; margin-bottom: 26px; }
.contact-row {
  display: flex; gap: 16px; align-items: flex-start;
  padding: 18px 0;
  border-bottom: 1px solid var(--line);
}
.contact-row:last-child { border-bottom: none; }
.contact-row .cr-icon {
  width: 46px; height: 46px;
  flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  border-radius: 12px;
  background: rgba(59,111,224,0.1);
  color: var(--brand-blue);
  font-size: 20px;
}
.contact-row .cr-label { font-size: 13px; color: var(--ink-faint); margin-bottom: 2px; }
.contact-row .cr-value { font-size: 16px; font-weight: 600; color: var(--ink); }

.map-placeholder {
  border-radius: var(--radius);
  background: var(--bg-soft);
  min-height: 100%;
  display: flex; align-items: center; justify-content: center;
  flex-direction: column; gap: 12px;
  color: var(--ink-faint);
  border: 1px dashed var(--line);
}

/* ============ 响应式 ============ */
@media (max-width: 900px) {
  .card-grid { grid-template-columns: 1fr 1fr; }
  .about-block { grid-template-columns: 1fr; gap: 36px; }
  .stat-bar { grid-template-columns: 1fr 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .product-hero { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
  .nav-menu { display: none; }
}

@media (max-width: 560px) {
  .card-grid { grid-template-columns: 1fr; }
  .stat-bar { grid-template-columns: 1fr 1fr; padding: 32px 24px; }
  .stat-item .num { font-size: 30px; }
  .footer-grid { grid-template-columns: 1fr; }
  .feature-list { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .btn { width: 100%; }
  .nav-phone span.ph-num { display: none; }
  .section { padding: 60px 0; }
}