/* ==============================
   星善急救 官网样式表
   ============================== */

/* ---- 变量与重置 ---- */
:root {
  --red: #C0392B;
  --red-dark: rgba(192,57,43,0.85);
  --red-bg: rgba(192,57,43,0.06);
  --red-pale: rgba(192,57,43,0.10);
  --blue: #1565C0;
  --green: #27ae60;
  --gray-900: #1a1a1a;
  --gray-700: #3d3d3d;
  --gray-500: #6b6b6b;
  --gray-300: #c8c8c8;
  --gray-100: #f5f5f5;
  --gray-50: #fafafa;
  --white: #ffffff;
  --border: rgba(0,0,0,0.08);
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --shadow-sm: 0 1px 4px rgba(0,0,0,0.06), 0 2px 12px rgba(0,0,0,0.04);
  --shadow-md: 0 4px 24px rgba(0,0,0,0.08), 0 1px 4px rgba(0,0,0,0.04);
  --shadow-lg: 0 8px 40px rgba(0,0,0,0.10);
  --font: 'PingFang SC', 'Hiragino Sans GB', 'Microsoft YaHei', -apple-system, sans-serif;
  --header-h: 72px;
  --container: 1200px;
  --transition: 0.22s cubic-bezier(0.4,0,0.2,1);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-font-smoothing: antialiased; }
body { font-family: var(--font); color: var(--gray-700); background: var(--white); line-height: 1.6; }
a { text-decoration: none; color: inherit; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

/* ---- 容器 ---- */
.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }

/* ---- Header ---- */
.header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 1000;
  height: var(--header-h);
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow var(--transition);
}
.header.scrolled { box-shadow: var(--shadow-sm); }
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  height: var(--header-h);
}

/* Logo */
.logo { display: flex; align-items: center; gap: 10px; }
.logo-icon { flex-shrink: 0; display: flex; }
.logo-text { display: flex; flex-direction: column; }
.logo-name { font-size: 18px; font-weight: 600; color: var(--gray-900); letter-spacing: 0.02em; line-height: 1.2; }
.logo-en { font-size: 10px; letter-spacing: 0.15em; color: var(--red); font-weight: 500; line-height: 1; }

/* Nav */
.nav { display: flex; align-items: center; gap: 4px; }
.nav-link {
  padding: 6px 14px; border-radius: var(--radius-sm);
  font-size: 14px; color: var(--gray-700);
  transition: color var(--transition), background var(--transition);
  white-space: nowrap;
}
.nav-link:hover, .nav-link.active { color: var(--red); background: var(--red-pale); }

.nav-toggle {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 4px;
}
.nav-toggle span {
  display: block; width: 22px; height: 2px;
  background: var(--gray-700); border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}

/* ---- Hero ---- */
.hero {
  position: relative; min-height: 100vh;
  display: flex; align-items: center;
  padding: calc(var(--header-h) + 60px) 0 80px;
  overflow: hidden;
  background: linear-gradient(135deg, #C0392B 0%, rgba(192,57,43,0.7) 50%, #C0392B 100%);
}
.hero-bg-wrapper {
  position: absolute; inset: 0; z-index: 0;
  background: linear-gradient(135deg, rgba(0,0,0,0.10) 0%, rgba(255,255,255,0.05) 100%);
}
.hero-bg-img {
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 100%;
  object-fit: cover;
  z-index: 0;
}
.sol-icon-large { position: relative; }
.sol-icon-large::after {
  content: "传递急救　为生命接力";
  position: absolute;
  bottom: 0; left: 0; right: 0;
  background: #C0392B;
  color: #fff;
  padding: 10px 16px;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  z-index: 2;
  text-align: center;
  box-shadow: 0 2px 8px rgba(0,0,0,0.3);
  pointer-events: none;
}
.hero-bg-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(0,0,0,0.25) 0%, rgba(0,0,0,0.10) 50%, rgba(0,0,0,0.25) 100%);
}
.hero-content { max-width: 680px; position: relative; z-index: 1; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 14px; border-radius: 20px;
  background: rgba(255,255,255,0.20); border: 1px solid rgba(255,255,255,0.35);
  font-size: 13px; color: #fff; font-weight: 500;
  margin-bottom: 24px;
}
.badge-dot { width: 7px; height: 7px; border-radius: 50%; background: #fff; animation: pulse-dot 2s infinite; }
@keyframes pulse-dot { 0%,100%{opacity:1;transform:scale(1)} 50%{opacity:0.5;transform:scale(0.8)} }

.hero-title {
  font-size: clamp(42px, 6vw, 72px); font-weight: 700;
  line-height: 1.15; color: #fff; letter-spacing: -0.02em;
  margin-bottom: 16px;
  text-shadow: 0 2px 12px rgba(0,0,0,0.30);
}
.text-red { color: var(--red); }
.hero-subtitle { font-size: 18px; font-weight: 500; color: rgba(255,255,255,0.85); margin-bottom: 12px; text-shadow: 0 1px 6px rgba(0,0,0,0.20); }
.hero-desc { font-size: 15px; color: rgba(255,255,255,0.70); line-height: 1.8; margin-bottom: 36px; }

.hero-actions { display: flex; gap: 14px; flex-wrap: wrap; margin-bottom: 56px; }

.hero-stats {
  display: flex; align-items: center; gap: 28px; flex-wrap: wrap;
  padding: 20px 0; border-top: 1px solid var(--border);
}
.stat-item { text-align: center; }
.stat-num { display: block; font-size: 28px; font-weight: 700; color: #fff; line-height: 1.2; text-shadow: 0 1px 6px rgba(0,0,0,0.20); }
.stat-label { font-size: 12px; color: rgba(255,255,255,0.70); }
.stat-divider { width: 1px; height: 36px; background: rgba(255,255,255,0.25); }

.hero-scroll {
  position: absolute; bottom: 28px; left: 50%; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 6px;
  font-size: 12px; color: var(--gray-500);
}
.scroll-arrow {
  width: 1px; height: 30px; background: var(--gray-300);
  animation: scroll-anim 1.8s infinite;
}
@keyframes scroll-anim { 0%{transform:scaleY(0);transform-origin:top} 50%{transform:scaleY(1);transform-origin:top} 51%{transform:scaleY(1);transform-origin:bottom} 100%{transform:scaleY(0);transform-origin:bottom} }

/* ---- Buttons ---- */
.btn {
  display: inline-flex; align-items: center; justify-content: center;
  padding: 12px 28px; border-radius: var(--radius-md);
  font-size: 15px; font-weight: 500; cursor: pointer;
  transition: all var(--transition); white-space: nowrap; border: none;
}
.btn-primary { background: var(--red); color: var(--white); }
.btn-primary:hover { background: var(--red-dark); transform: translateY(-1px); box-shadow: 0 4px 16px rgba(192,57,43,0.3); }
.btn-outline { background: transparent; color: var(--red); border: 1.5px solid var(--red); }
.btn-outline:hover { background: var(--red-pale); }
.btn-white { background: var(--white); color: var(--red); }
.btn-white:hover { background: #f8f8f8; transform: translateY(-1px); }
.btn-outline-white { background: transparent; color: var(--white); border: 1.5px solid rgba(255,255,255,0.6); }
.btn-outline-white:hover { background: rgba(255,255,255,0.1); }
.btn-sm { padding: 8px 18px; font-size: 13px; }

/* ---- 官方背书 ---- */
.endorsement {
  background: var(--white);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 20px 0;
}
.endorsement-inner {
  display: flex; align-items: center; gap: 32px; flex-wrap: wrap;
}
.endorsement-label {
  font-size: 12px; color: var(--gray-500); white-space: nowrap;
  padding-right: 24px; border-right: 1px solid var(--border);
  letter-spacing: 0.05em;
}
.endorsement-logos {
  display: flex; align-items: center; gap: 8px; flex-wrap: wrap; flex: 1;
}
.endorsement-item {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 16px; border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  font-size: 13px; color: var(--gray-700); font-weight: 500;
  transition: all var(--transition);
  background: var(--white);
}
.endorsement-item:hover { border-color: var(--red); background: var(--red-pale); }
.endorsement-sep { width: 1px; height: 28px; background: var(--border); }
.end-icon { display: flex; align-items: center; justify-content: center; }

/* ---- Section 通用 ---- */
.section { padding: 80px 0; }
.section-header { text-align: center; margin-bottom: 56px; }
.section-tag {
  display: inline-block;
  padding: 4px 14px; border-radius: 20px;
  background: var(--red-pale); border: 1px solid rgba(192,57,43,0.15);
  font-size: 12px; color: var(--red); font-weight: 500;
  letter-spacing: 0.06em; margin-bottom: 16px;
}
.section-title { font-size: clamp(26px, 4vw, 38px); font-weight: 700; color: var(--gray-900); margin-bottom: 14px; }
.section-desc { font-size: 15px; color: var(--gray-500); max-width: 560px; margin: 0 auto; }
.section-footer { text-align: center; margin-top: 44px; }

/* ---- 核心业务 ---- */
.services { background: var(--gray-100); }
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.service-card {
  background: var(--white); border-radius: var(--radius-lg);
  padding: 32px 28px; border: 1px solid var(--border);
  transition: all var(--transition);
}
.service-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: rgba(192,57,43,0.15); }
.service-card.card-primary { background: var(--red); color: var(--white); }
.service-card.card-primary h3, .service-card.card-primary p { color: rgba(255,255,255,0.95); }
.service-card.card-primary .service-link { color: rgba(255,255,255,0.8); }
.service-card.card-primary .service-link:hover { color: var(--white); }

.service-icon { margin-bottom: 20px; }
.service-card h3 { font-size: 17px; font-weight: 600; color: var(--gray-900); margin-bottom: 10px; }
.service-card p { font-size: 14px; color: var(--gray-500); line-height: 1.7; margin-bottom: 20px; }
.service-link { font-size: 13px; font-weight: 500; color: var(--red); transition: color var(--transition); }
.service-link:hover { color: var(--red-dark); }

/* ---- 场景 ---- */
.scenarios { background: var(--white); }
.scenarios-grid {
  display: grid;
  grid-template-columns: repeat(9, 1fr);
  gap: 12px;
}
.scenario-item {
  display: flex; flex-direction: column; align-items: center; gap: 10px;
  padding: 20px 10px; border-radius: var(--radius-md);
  border: 1px solid var(--border);
  font-size: 13px; font-weight: 500; color: var(--gray-700);
  transition: all var(--transition); cursor: default;
}
.scenario-item:hover { border-color: var(--red); background: var(--red-pale); color: var(--red); }
.scenario-icon { display: flex; align-items: center; justify-content: center; }

/* ---- AI 板块 ---- */
.ai-section { background: var(--gray-100); }
.ai-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.ai-content .section-title { text-align: left; }
.ai-content .section-tag { display: inline-block; margin-bottom: 12px; }
.ai-desc { font-size: 15px; color: var(--gray-500); line-height: 1.8; margin-bottom: 28px; }
.ai-features { display: flex; flex-direction: column; gap: 14px; margin-bottom: 32px; }
.ai-features li { display: flex; align-items: flex-start; gap: 12px; }
.feature-dot { flex-shrink: 0; width: 8px; height: 8px; border-radius: 50%; background: var(--red); margin-top: 6px; }
.ai-features li div { display: flex; flex-direction: column; gap: 2px; }
.ai-features li strong { font-size: 14px; font-weight: 600; color: var(--gray-900); }
.ai-features li span { font-size: 13px; color: var(--gray-500); }

/* AI Dashboard 模拟 */
.ai-dashboard {
  background: var(--white); border-radius: var(--radius-lg);
  border: 1px solid var(--border); box-shadow: var(--shadow-lg);
  overflow: hidden;
}
.dashboard-header {
  display: flex; align-items: center; gap: 6px;
  padding: 14px 20px; background: var(--gray-900);
  border-bottom: 1px solid rgba(255,255,255,0.05);
}
.dash-dot { width: 11px; height: 11px; border-radius: 50%; }
.dash-dot.red { background: #FF5F57; }
.dash-dot.yellow { background: #FEBC2E; }
.dash-dot.green { background: #28C840; }
.dashboard-header span { font-size: 13px; color: rgba(255,255,255,0.6); margin-left: 8px; font-weight: 500; }

.dashboard-content { padding: 24px; }
.dash-metrics { display: grid; grid-template-columns: repeat(3,1fr); gap: 12px; margin-bottom: 24px; }
.dash-metric {
  display: flex; flex-direction: column; gap: 4px;
  padding: 14px; background: var(--gray-100); border-radius: var(--radius-md);
  text-align: center;
}
.metric-val { font-size: 22px; font-weight: 700; color: var(--gray-900); }
.metric-val.red-text { color: var(--red); }
.metric-lbl { font-size: 11px; color: var(--gray-500); }

.dash-chart { background: var(--gray-100); border-radius: var(--radius-md); padding: 16px; margin-bottom: 16px; }
.chart-bars { display: flex; align-items: flex-end; gap: 8px; height: 80px; margin-bottom: 8px; }
.chart-bar {
  flex: 1; border-radius: 3px 3px 0 0;
  background: rgba(192,57,43,0.2);
  display: flex; align-items: flex-end; justify-content: center;
  padding-bottom: 4px;
  transition: background var(--transition);
}
.chart-bar.active { background: var(--red); }
.chart-bar span { font-size: 10px; color: var(--gray-500); writing-mode: vertical-rl; }
.chart-bar.active span { color: var(--white); }
.chart-title { font-size: 12px; color: var(--gray-500); text-align: center; }

.dash-alert {
  display: flex; align-items: center; gap: 10px;
  padding: 10px 14px; background: rgba(39,174,96,0.08);
  border: 1px solid rgba(39,174,96,0.2); border-radius: var(--radius-sm);
  font-size: 13px; color: #27ae60;
}
.alert-dot { width: 8px; height: 8px; border-radius: 50%; background: #27ae60; flex-shrink: 0; }
.alert-dot.pulse { animation: pulse-alert 2s infinite; }
@keyframes pulse-alert { 0%,100%{box-shadow:0 0 0 0 rgba(39,174,96,0.4)} 50%{box-shadow:0 0 0 6px rgba(39,174,96,0)} }

/* ---- 为什么选择 ---- */
.why-us { background: var(--white); }
.why-grid { display: grid; grid-template-columns: repeat(4,1fr); gap: 20px; }
.why-card {
  padding: 32px 24px; border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  transition: all var(--transition);
}
.why-card:hover { border-color: rgba(192,57,43,0.2); box-shadow: var(--shadow-sm); }
.why-num { font-size: 36px; font-weight: 800; color: var(--red-pale); margin-bottom: 12px; line-height: 1; }
.why-card h3 { font-size: 16px; font-weight: 600; color: var(--gray-900); margin-bottom: 10px; }
.why-card p { font-size: 14px; color: var(--gray-500); line-height: 1.7; }

/* ---- 成功案例 ---- */
.cases-preview { background: var(--gray-100); }
.cases-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 20px; }
.case-card {
  background: var(--white); border-radius: var(--radius-lg);
  padding: 28px; border: 1px solid var(--border);
  transition: all var(--transition);
}
.case-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.case-tag {
  display: inline-block; padding: 3px 10px; border-radius: 4px;
  background: var(--red-pale); color: var(--red);
  font-size: 12px; font-weight: 500; margin-bottom: 12px;
}
.case-card h4 { font-size: 15px; font-weight: 600; color: var(--gray-900); margin-bottom: 10px; line-height: 1.5; }
.case-card p { font-size: 13px; color: var(--gray-500); line-height: 1.7; margin-bottom: 16px; }
.case-result { display: flex; gap: 10px; flex-wrap: wrap; }
.case-result span {
  padding: 4px 10px; border-radius: 4px;
  background: rgba(39,174,96,0.08); border: 1px solid rgba(39,174,96,0.2);
  font-size: 12px; color: #27ae60; font-weight: 500;
}

/* ---- CTA ---- */
.cta-section {
  background: var(--red); padding: 64px 0;
}
.cta-inner {
  display: flex; align-items: center; justify-content: space-between; gap: 32px;
  flex-wrap: wrap;
}
.cta-content h2 { font-size: 28px; font-weight: 700; color: var(--white); margin-bottom: 8px; }
.cta-content p { font-size: 15px; color: rgba(255,255,255,0.8); }
.cta-actions { display: flex; gap: 14px; flex-wrap: wrap; }
.cta-qr-wrapper { background: var(--white); border-radius: var(--radius-lg); padding: 14px 18px; display: flex; flex-direction: column; align-items: center; gap: 6px; box-shadow: var(--shadow-md); }
.cta-qr-img { width: 150px; height: 150px; object-fit: contain; border-radius: var(--radius-sm); }
.cta-qr-label { font-size: 12px; color: var(--gray-500); font-weight: 500; text-align: center; margin: 0; }

/* ---- 新闻 ---- */
.news-preview { background: var(--white); }
.news-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 28px; }
.news-card.featured {
  background: var(--gray-100); border-radius: var(--radius-lg);
  padding: 28px; border: 1px solid var(--border);
}
.news-meta { display: flex; align-items: center; gap: 10px; margin-bottom: 14px; }
.news-cat {
  padding: 3px 10px; border-radius: 4px;
  background: var(--red-pale); color: var(--red);
  font-size: 12px; font-weight: 500;
}
.news-date { font-size: 12px; color: var(--gray-500); }
.news-card h4 { font-size: 17px; font-weight: 600; color: var(--gray-900); margin-bottom: 10px; line-height: 1.5; }
.news-card p { font-size: 14px; color: var(--gray-500); line-height: 1.7; margin-bottom: 16px; }
.news-link { font-size: 13px; font-weight: 500; color: var(--red); }
.news-list { display: flex; flex-direction: column; gap: 0; }
.news-item {
  display: flex; gap: 14px; align-items: flex-start;
  padding: 16px 0; border-bottom: 1px solid var(--border);
}
.news-item:last-child { border-bottom: none; }
.news-date-sm { font-size: 11px; color: var(--gray-500); white-space: nowrap; padding-top: 2px; min-width: 70px; }
.news-cat-sm {
  display: inline-block; padding: 2px 8px; border-radius: 3px;
  background: var(--red-pale); color: var(--red);
  font-size: 11px; font-weight: 500; margin-bottom: 4px;
}
.news-item h5 { font-size: 14px; color: var(--gray-700); line-height: 1.5; font-weight: 500; }

/* ---- Footer ---- */
.footer { background: var(--gray-100); color: var(--gray-500); padding: 64px 0 0; border-top: 1px solid var(--border); }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: 48px; padding-bottom: 48px; }
.footer-brand .logo-name { color: var(--red); }
.footer-logo { margin-bottom: 16px; }
.footer-slogan { font-size: 15px; color: var(--gray-900); font-weight: 500; margin-bottom: 8px; }
.footer-desc { font-size: 13px; color: var(--gray-500); line-height: 1.7; margin-bottom: 20px; }
.footer-social { display: flex; gap: 8px; }
.social-btn {
  padding: 6px 14px; border-radius: 6px;
  border: 1px solid var(--border);
  font-size: 12px; color: var(--gray-500);
  transition: all var(--transition);
}
.social-btn:hover { border-color: var(--red); color: var(--red); }
.footer-nav h4 { font-size: 14px; font-weight: 600; color: var(--gray-900); margin-bottom: 16px; }
.footer-nav ul li { margin-bottom: 10px; }
.footer-nav ul li a { font-size: 13px; color: var(--gray-500); transition: color var(--transition); }
.footer-nav ul li a:hover { color: var(--red); }
.footer-contact h4 { font-size: 14px; font-weight: 600; color: var(--gray-900); margin-bottom: 16px; }
.footer-contact p { font-size: 13px; color: var(--gray-500); margin-bottom: 10px; }
.footer-contact .btn-primary { margin-top: 8px; }
.footer-bottom {
  border-top: 1px solid var(--border);
  padding: 20px 0;
  display: flex; flex-direction: column; gap: 4px;
}
.footer-bottom p { font-size: 12px; color: var(--gray-300); }
.footer-bottom a { color: var(--gray-500); transition: color var(--transition); }
.footer-bottom a:hover { color: var(--red); }

/* ---- 内页通用 ---- */
.page-hero {
  padding: calc(var(--header-h) + 60px) 0 60px;
  background: linear-gradient(135deg, var(--red-bg) 0%, var(--red-pale) 100%);
  text-align: center;
}
.page-hero h1 { font-size: clamp(32px, 5vw, 52px); font-weight: 700; color: var(--gray-900); margin-bottom: 14px; }
.page-hero p { font-size: 16px; color: var(--gray-500); max-width: 640px; margin: 0 auto; }
.breadcrumb { display: flex; align-items: center; gap: 8px; justify-content: center; margin-bottom: 20px; }
.breadcrumb span, .breadcrumb a { font-size: 13px; color: var(--gray-500); }
.breadcrumb a:hover { color: var(--red); }
.breadcrumb-sep { color: var(--gray-300); }

/* ---- 解决方案页 ---- */
.solutions-section { padding: 80px 0; }
.solutions-nav {
  display: flex; justify-content: center; gap: 8px; flex-wrap: wrap; margin-bottom: 56px;
}
.sol-nav-btn {
  padding: 8px 18px; border-radius: 20px;
  border: 1.5px solid var(--border); background: var(--white);
  font-size: 14px; color: var(--gray-700); cursor: pointer;
  transition: all var(--transition);
}
.sol-nav-btn.active, .sol-nav-btn:hover { border-color: var(--red); color: var(--red); background: var(--red-pale); }
.solution-detail { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; margin-bottom: 80px; }
.solution-detail.reverse .sol-content { order: 2; }
.solution-detail.reverse .sol-visual { order: 1; }
.sol-content .section-tag { display: inline-block; margin-bottom: 12px; }
.sol-content h2 { font-size: 28px; font-weight: 700; color: var(--gray-900); margin-bottom: 14px; }
.sol-content p { font-size: 15px; color: var(--gray-500); line-height: 1.8; margin-bottom: 24px; }
.sol-points { display: flex; flex-direction: column; gap: 10px; }
.sol-point { display: flex; align-items: center; gap: 10px; font-size: 14px; color: var(--gray-700); }
.sol-point::before { content: ''; flex-shrink: 0; width: 6px; height: 6px; border-radius: 50%; background: var(--red); }
.sol-visual {
  background: var(--gray-100); border-radius: var(--radius-lg);
  min-height: 320px; display: flex; align-items: center; justify-content: center;
  border: 1px solid var(--border); position: relative; overflow: hidden;
}
.sol-icon-large { width: 100%; height: 100%; }
.sol-icon-large img { width: 100%; height: 100%; object-fit: cover; border-radius: var(--radius-lg); }

/* ---- AI 页 ---- */
.ai-hero-section {
  padding: calc(var(--header-h) + 80px) 0 80px;
  background: linear-gradient(135deg, var(--gray-50) 0%, var(--red-bg) 100%);
  overflow: hidden; position: relative;
}
.ai-hero-section::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse 60% 80% at 50% 50%, rgba(192,57,43,0.06) 0%, transparent 70%);
}
.ai-hero-content { position: relative; z-index: 1; text-align: center; max-width: 700px; margin: 0 auto; }
.ai-hero-tag { display: inline-block; padding: 5px 14px; border-radius: 20px; background: var(--red-pale); border: 1px solid rgba(192,57,43,0.15); font-size: 12px; color: var(--red); font-weight: 500; margin-bottom: 20px; letter-spacing: 0.08em; }
.ai-hero-content h1 { font-size: clamp(36px, 5vw, 56px); font-weight: 700; color: var(--gray-900); margin-bottom: 16px; line-height: 1.2; }
.ai-hero-content p { font-size: 16px; color: var(--gray-500); line-height: 1.8; }

.ai-features-section { padding: 80px 0; background: var(--white); }
.ai-modules-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 24px; }
.ai-module-card {
  padding: 28px; border-radius: var(--radius-lg);
  border: 1px solid var(--border); background: var(--white);
  transition: all var(--transition);
}
.ai-module-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: rgba(192,57,43,0.15); }
.module-num { font-size: 40px; font-weight: 800; color: var(--red-pale); margin-bottom: 12px; line-height: 1; }
.ai-module-card h3 { font-size: 16px; font-weight: 600; color: var(--gray-900); margin-bottom: 8px; }
.ai-module-card p { font-size: 14px; color: var(--gray-500); line-height: 1.7; }

/* ---- 关于我们 ---- */
.about-story { padding: 80px 0; }
.about-inner { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.about-content h2 { font-size: 32px; font-weight: 700; color: var(--gray-900); margin-bottom: 20px; line-height: 1.4; }
.about-content p { font-size: 15px; color: var(--gray-500); line-height: 1.9; margin-bottom: 16px; }
.about-highlight {
  display: flex; align-items: flex-start; gap: 14px;
  padding: 16px 20px; border-radius: var(--radius-md);
  background: var(--red-pale); border-left: 3px solid var(--red);
  margin-top: 24px;
}
.about-highlight p { margin-bottom: 0; color: var(--gray-700); font-size: 14px; font-style: italic; }

.team-section { padding: 80px 0; background: var(--gray-100); }
.team-values { display: grid; grid-template-columns: repeat(4,1fr); gap: 20px; }
.value-card {
  text-align: center; padding: 32px 20px;
  background: var(--white); border-radius: var(--radius-lg);
  border: 1px solid var(--border);
}
.value-icon { width: 56px; height: 56px; border-radius: 50%; background: var(--red-pale); display: flex; align-items: center; justify-content: center; margin: 0 auto 16px; }
.value-card h3 { font-size: 16px; font-weight: 600; color: var(--gray-900); margin-bottom: 8px; }
.value-card p { font-size: 13px; color: var(--gray-500); line-height: 1.7; }

.milestone-section { padding: 80px 0; }
.timeline { position: relative; padding-left: 32px; }
.timeline::before { content: ''; position: absolute; left: 7px; top: 4px; bottom: 4px; width: 2px; background: var(--border); }
.timeline-item { position: relative; padding-bottom: 36px; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-dot { position: absolute; left: -29px; top: 4px; width: 16px; height: 16px; border-radius: 50%; background: var(--red); border: 3px solid var(--white); box-shadow: 0 0 0 2px var(--red); }
.timeline-year { font-size: 12px; font-weight: 600; color: var(--red); margin-bottom: 4px; letter-spacing: 0.05em; }
.timeline-item h4 { font-size: 15px; font-weight: 600; color: var(--gray-900); margin-bottom: 4px; }
.timeline-item p { font-size: 13px; color: var(--gray-500); line-height: 1.6; }

/* ---- 招商合作 ---- */
.partner-cards-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 20px; }
.partner-support-card {
  padding: 28px; border-radius: var(--radius-lg);
  background: var(--white); border: 1px solid var(--border);
  transition: all var(--transition);
}
.partner-support-card:hover { border-color: rgba(192,57,43,0.2); box-shadow: var(--shadow-md); }
.psc-icon { width: 48px; height: 48px; border-radius: var(--radius-md); background: var(--red-pale); display: flex; align-items: center; justify-content: center; margin-bottom: 16px; }
.partner-support-card h3 { font-size: 16px; font-weight: 600; color: var(--gray-900); margin-bottom: 8px; }
.partner-support-card p { font-size: 14px; color: var(--gray-500); line-height: 1.7; }

/* ---- 联系页 ---- */
.contact-section { padding: 80px 0; }
.contact-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 60px; align-items: stretch; }
.contact-info { display: flex; flex-direction: column; position: relative; }
.contact-info h2 { font-size: 28px; font-weight: 700; color: var(--gray-900); margin-bottom: 14px; }
.contact-info > p { font-size: 15px; color: var(--gray-500); line-height: 1.8; margin-bottom: 32px; }
.contact-items-wrap { display: flex; gap: 24px; align-items: flex-start; }
.contact-items { flex: 1; display: flex; flex-direction: column; gap: 20px; }
.contact-item { display: flex; gap: 14px; align-items: flex-start; }
.ci-icon { width: 42px; height: 42px; border-radius: var(--radius-md); background: var(--red-pale); display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.ci-text h4 { font-size: 14px; font-weight: 600; color: var(--gray-900); margin-bottom: 2px; }
.ci-text p { font-size: 14px; color: var(--gray-500); line-height: 1.6; }
.ci-qr-side { flex-shrink: 0; display: flex; flex-direction: column; align-items: center; }
.ci-qr-side img { width: 130px; height: 130px; object-fit: cover; object-position: center 42%; border-radius: var(--radius-sm); border: 1px solid var(--border); background: var(--white); }
.ci-qr-side span { font-size: 11px; color: var(--gray-500); margin-top: 6px; white-space: nowrap; }
.contact-promise { margin-top: 28px; }
.contact-promise h3 { font-size: 16px; font-weight: 600; color: var(--gray-900); margin-bottom: 16px; }
.promise-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.promise-item { display: flex; gap: 10px; align-items: flex-start; padding: 12px; border-radius: var(--radius-md); background: var(--gray-100); border: 1px solid var(--border); }
.promise-icon { flex-shrink: 0; width: 36px; height: 36px; border-radius: 8px; background: var(--red-pale); display: flex; align-items: center; justify-content: center; }
.promise-item h4 { font-size: 13px; font-weight: 600; color: var(--gray-900); margin-bottom: 2px; }
.promise-item p { font-size: 12px; color: var(--gray-500); line-height: 1.5; }

.contact-form { background: var(--gray-100); border-radius: var(--radius-lg); padding: 36px; }
.contact-form h3 { font-size: 20px; font-weight: 600; color: var(--gray-900); margin-bottom: 24px; }
.form-group { margin-bottom: 18px; }
.form-group label { display: block; font-size: 13px; font-weight: 500; color: var(--gray-700); margin-bottom: 6px; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 11px 14px;
  border: 1.5px solid var(--border); border-radius: var(--radius-sm);
  font-size: 14px; color: var(--gray-900); font-family: var(--font);
  background: var(--white); transition: border-color var(--transition); outline: none;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { border-color: var(--red); }
.form-group textarea { resize: vertical; min-height: 100px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }

/* ---- 新闻页 ---- */
.news-full-grid { display: grid; grid-template-columns: 2fr 1fr; gap: 40px; }
.news-main-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; margin-bottom: 20px; }
.news-full-card { background: var(--white); border-radius: var(--radius-lg); border: 1px solid var(--border); overflow: hidden; transition: all var(--transition); }
.news-full-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); }
.news-full-card.wide { grid-column: 1 / -1; display: grid; grid-template-columns: 1.5fr 1fr; }
.news-card-img { aspect-ratio: 16/9; background: var(--gray-100); overflow: hidden; }
.news-card-img.landscape { aspect-ratio: auto; }
.news-card-img-placeholder { width: 100%; height: 100%; background: linear-gradient(135deg, var(--red-pale) 0%, var(--gray-100) 100%); display: flex; align-items: center; justify-content: center; }
.news-card-body { padding: 20px; }
.news-sidebar h3 { font-size: 16px; font-weight: 600; color: var(--gray-900); margin-bottom: 16px; }
.sidebar-news-list { display: flex; flex-direction: column; }
.sidebar-news-item { padding: 14px 0; border-bottom: 1px solid var(--border); }
.sidebar-news-item:last-child { border-bottom: none; }
.sidebar-news-item .news-cat-sm { margin-bottom: 4px; }
.sidebar-news-item h4 { font-size: 13px; color: var(--gray-700); line-height: 1.5; font-weight: 500; }
.sidebar-news-item .news-date-sm { margin-top: 4px; display: block; }

/* ---- 响应式 ---- */
@media (max-width: 1024px) {
  .services-grid { grid-template-columns: repeat(2,1fr); }
  .scenarios-grid { grid-template-columns: repeat(3,1fr); }
  .why-grid { grid-template-columns: repeat(2,1fr); }
  .cases-grid { grid-template-columns: repeat(2,1fr); }
  .news-grid { grid-template-columns: 1fr; }
  .ai-inner { grid-template-columns: 1fr; gap: 40px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .ai-modules-grid { grid-template-columns: repeat(2,1fr); }
  .partner-cards-grid { grid-template-columns: repeat(2,1fr); }
  .team-values { grid-template-columns: repeat(2,1fr); }
  .about-inner { grid-template-columns: 1fr; gap: 40px; }
  .solution-detail { grid-template-columns: 1fr; gap: 40px; }
  .news-full-grid { grid-template-columns: 1fr; }
  .news-main-grid { grid-template-columns: 1fr; }
  .news-full-card.wide { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; gap: 40px; }
}

@media (max-width: 768px) {
  .nav { display: none; position: fixed; top: var(--header-h); left: 0; right: 0; background: var(--white); flex-direction: column; gap: 0; padding: 12px 16px 20px; border-bottom: 1px solid var(--border); box-shadow: var(--shadow-md); z-index: 999; }
  .nav.open { display: flex; }
  .nav-link { width: 100%; padding: 12px 16px; border-radius: var(--radius-sm); }
  .nav-toggle { display: flex; }
  .services-grid { grid-template-columns: 1fr; }
  .scenarios-grid { grid-template-columns: repeat(3,1fr); }
  .why-grid { grid-template-columns: 1fr; }
  .cases-grid { grid-template-columns: 1fr; }
  .cta-inner { flex-direction: column; text-align: center; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .hero-stats { gap: 18px; }
  .stat-divider { display: none; }
  .hero-actions { flex-direction: column; align-items: flex-start; }
  .hero-badge { font-size: 12px; }
  .endorsement-inner { flex-direction: column; align-items: flex-start; }
  .endorsement-label { border-right: none; border-bottom: 1px solid var(--border); padding-bottom: 12px; padding-right: 0; }
  .endorsement-sep { display: none; }
  .solution-detail { grid-template-columns: 1fr; }
  .solution-detail.reverse .sol-content { order: 0; }
  .solution-detail.reverse .sol-visual { order: 0; }
  .partner-hero-inner { grid-template-columns: 1fr; }
  .about-inner { grid-template-columns: 1fr; }
  .partner-cards-grid { grid-template-columns: 1fr; }
  .team-values { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .ai-modules-grid { grid-template-columns: 1fr; }
  .contact-items-wrap { flex-direction: column; align-items: center; }
  .ci-qr-side img { width: 110px; height: 110px; }
}

@media (max-width: 480px) {
  .scenarios-grid { grid-template-columns: repeat(3,1fr); gap: 8px; }
  .scenario-item { padding: 14px 6px; font-size: 11px; }
  .hero-title { font-size: 38px; }
  .section-title { font-size: 24px; }
}