/* 知微见己官网 — 共用样式 */
@font-face {
  font-family: 'AlibabaPuHuiTi';
  src: url('https://resource-static.bj.bcebos.com/fonts-skill/AlibabaPuHuiTi_Regular.ttf') format('truetype');
  font-weight: 400;
  font-display: swap;
}
@font-face {
  font-family: 'AlibabaPuHuiTi';
  src: url('https://resource-static.bj.bcebos.com/fonts-skill/AlibabaPuHuiTi_SemiBold.ttf') format('truetype');
  font-weight: 700;
  font-display: swap;
}

/* ===== CSS 变量 ===== */
:root {
  --primary: #1F3864;
  --primary-dark: #0A1F44;
  --accent: #2F80ED;
  --bg: #F5F7FA;
  --fg: #1A2340;
  --muted: #6B7A99;
  --border: #D0D9E8;
  --white: #FFFFFF;
  --card-shadow: 0 4px 20px rgba(31,56,100,0.10);
  --radius: 12px;
  --radius-sm: 8px;
  --nav-h: 68px;
  --max-w: 1200px;
  --transition: 0.2s ease;
}

/* ===== 重置 ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: 'AlibabaPuHuiTi', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  background: var(--bg);
  color: var(--fg);
  line-height: 1.7;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { list-style: none; }

/* ===== 布局工具 ===== */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}
.section { padding: 80px 0; }
.section-alt { background: var(--white); }
.section-title {
  font-size: clamp(1.6rem, 3vw, 2.2rem);
  font-weight: 700;
  color: var(--primary);
  text-align: center;
  margin-bottom: 12px;
}
.section-sub {
  text-align: center;
  color: var(--muted);
  font-size: 1rem;
  margin-bottom: 48px;
}

/* ===== 按钮 ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 32px;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  border: none;
  transition: transform var(--transition), box-shadow var(--transition);
  font-family: inherit;
  line-height: 1;
}
.btn-primary {
  background: var(--accent);
  color: var(--white);
  box-shadow: 0 4px 14px rgba(47,128,237,0.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 20px rgba(47,128,237,0.45); }
.btn-outline {
  background: transparent;
  border: 2px solid var(--white);
  color: var(--white);
}
.btn-outline:hover { background: rgba(255,255,255,0.12); transform: translateY(-2px); }
.btn-lg { padding: 18px 40px; font-size: 1.1rem; }

/* ===== 导航 ===== */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--nav-h);
  background: rgba(255,255,255,0.96);
  border-bottom: 1px solid var(--border);
  z-index: 1000;
  display: flex;
  align-items: center;
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 24px;
}
.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}
.nav-logo {
  width: 40px;
  height: 40px;
  background: var(--primary);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  font-weight: 700;
  font-size: 1.1rem;
  flex-shrink: 0;
}
.nav-name {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--primary);
}
.nav-slogan {
  font-size: 0.75rem;
  color: var(--muted);
}
.nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
}
.nav-links a {
  padding: 8px 14px;
  border-radius: 6px;
  font-size: 0.95rem;
  color: var(--fg);
  transition: background var(--transition), color var(--transition);
}
.nav-links a:hover,
.nav-links a.active {
  background: var(--primary);
  color: var(--white);
}
.nav-cta { margin-left: 12px; padding: 10px 20px !important; font-size: 0.9rem !important; }

/* 汉堡 */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 8px;
  background: none;
  border: none;
}
.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--primary);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}
.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* 移动端下拉菜单 */
.nav-mobile {
  display: none;
  position: fixed;
  top: var(--nav-h);
  left: 0; right: 0;
  background: var(--white);
  border-bottom: 1px solid var(--border);
  padding: 12px 24px 20px;
  z-index: 999;
  box-shadow: 0 8px 24px rgba(0,0,0,0.10);
}
.nav-mobile.open { display: block; }
.nav-mobile a {
  display: block;
  padding: 12px 0;
  border-bottom: 1px solid var(--border);
  font-size: 1rem;
  color: var(--fg);
  transition: color var(--transition);
}
.nav-mobile a:last-child { border-bottom: none; }
.nav-mobile a.active, .nav-mobile a:hover { color: var(--accent); }
.nav-mobile .btn { margin-top: 16px; width: 100%; }

/* 页面顶部留出导航高度 */
.page-top { padding-top: var(--nav-h); }

/* ===== Hero ===== */
.hero {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  position: relative;
  overflow: hidden;
  padding: 100px 0 80px;
}
/* 数据坐标网格签名效果 */
.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.06) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.06) 1px, transparent 1px);
  background-size: 40px 40px;
  pointer-events: none;
}
.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  color: var(--white);
}
.hero-badge {
  display: inline-block;
  background: rgba(255,255,255,0.15);
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: 20px;
  padding: 6px 18px;
  font-size: 0.85rem;
  margin-bottom: 24px;
}
.hero-title {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 20px;
}
.hero-title .accent { color: #7EC8F5; }
.hero-sub {
  font-size: clamp(1rem, 2vw, 1.25rem);
  color: rgba(255,255,255,0.80);
  margin-bottom: 40px;
  letter-spacing: 0.05em;
}
.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; }

/* ===== 卡片通用 ===== */
.card {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--card-shadow);
  border: 1px solid var(--border);
  padding: 32px 28px;
  transition: transform var(--transition), box-shadow var(--transition);
}
.card:hover { transform: translateY(-4px); box-shadow: 0 12px 32px rgba(31,56,100,0.15); }
.card-icon {
  width: 52px; height: 52px;
  border-radius: 12px;
  background: rgba(31,56,100,0.08);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.6rem;
  margin-bottom: 16px;
}
.card-title { font-size: 1.1rem; font-weight: 700; color: var(--primary); margin-bottom: 8px; }
.card-desc { font-size: 0.9rem; color: var(--muted); line-height: 1.6; }

/* 三列网格 */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 24px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }

/* ===== 步骤条 ===== */
.steps { display: flex; gap: 0; align-items: flex-start; }
.step { flex: 1; text-align: center; position: relative; }
.step:not(:last-child)::after {
  content: '';
  position: absolute;
  top: 28px; left: 50%;
  width: 100%; height: 2px;
  background: var(--border);
  z-index: 0;
}
.step-num {
  width: 56px; height: 56px;
  border-radius: 50%;
  background: var(--primary);
  color: var(--white);
  font-size: 1.3rem;
  font-weight: 700;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 16px;
  position: relative; z-index: 1;
}
.step-title { font-size: 1rem; font-weight: 700; color: var(--primary); margin-bottom: 8px; }
.step-desc { font-size: 0.85rem; color: var(--muted); padding: 0 12px; }

/* ===== Banner / 横幅 ===== */
.banner {
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  border-radius: var(--radius);
  padding: 48px 40px;
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.banner-title { font-size: 1.5rem; font-weight: 700; margin-bottom: 8px; }
.banner-sub { font-size: 0.95rem; opacity: 0.85; }

/* ===== 定价卡 ===== */
.price-card {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--card-shadow);
  border: 1px solid var(--border);
  padding: 36px 28px;
  text-align: center;
  transition: transform var(--transition), box-shadow var(--transition);
}
.price-card:hover { transform: translateY(-4px); box-shadow: 0 12px 32px rgba(31,56,100,0.15); }
.price-card.featured {
  background: var(--primary);
  color: var(--white);
  border-color: var(--primary);
  transform: scale(1.04);
}
.price-card.featured:hover { transform: scale(1.04) translateY(-4px); }
.price-card.featured .price-label,
.price-card.featured .price-desc,
.price-card.featured .price-feature { color: rgba(255,255,255,0.80); }
.price-tag { font-size: 0.8rem; font-weight: 700; background: var(--accent); color: white; padding: 4px 12px; border-radius: 20px; display: inline-block; margin-bottom: 12px; }
.price-name { font-size: 1.3rem; font-weight: 700; color: var(--primary); margin-bottom: 8px; }
.price-card.featured .price-name { color: var(--white); }
.price-label { font-size: 0.85rem; color: var(--muted); margin-bottom: 24px; }
.price-features { text-align: left; margin: 24px 0; border-top: 1px solid var(--border); padding-top: 20px; }
.price-card.featured .price-features { border-color: rgba(255,255,255,0.2); }
.price-feature { display: flex; align-items: flex-start; gap: 8px; margin-bottom: 10px; font-size: 0.9rem; }
.price-feature::before { content: '✓'; color: var(--accent); font-weight: 700; flex-shrink: 0; }
.price-card.featured .price-feature::before { color: #7EC8F5; }

/* ===== 8维雷达卡 ===== */
.dim-card {
  background: var(--white);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 24px;
  display: flex;
  align-items: flex-start;
  gap: 16px;
  box-shadow: 0 2px 12px rgba(31,56,100,0.06);
  transition: transform var(--transition), box-shadow var(--transition);
}
.dim-card:hover { transform: translateY(-3px); box-shadow: var(--card-shadow); }
.dim-num {
  width: 40px; height: 40px; flex-shrink: 0;
  border-radius: 10px;
  background: var(--primary);
  color: var(--white);
  font-size: 1rem;
  font-weight: 700;
  display: flex; align-items: center; justify-content: center;
}
.dim-body h3 { font-size: 1rem; font-weight: 700; color: var(--primary); margin-bottom: 4px; }
.dim-body p { font-size: 0.85rem; color: var(--muted); line-height: 1.6; }

/* ===== Footer ===== */
.footer {
  background: var(--primary-dark);
  color: rgba(255,255,255,0.75);
  padding: 48px 0 28px;
}
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px; margin-bottom: 40px; }
.footer-brand-name { font-size: 1.3rem; font-weight: 700; color: var(--white); margin-bottom: 8px; }
.footer-slogan { font-size: 0.85rem; opacity: 0.65; margin-bottom: 16px; }
.footer-contact { font-size: 0.85rem; line-height: 2; }
.footer-col h4 { font-size: 0.95rem; font-weight: 700; color: var(--white); margin-bottom: 16px; }
.footer-col a {
  display: block;
  font-size: 0.85rem;
  padding: 4px 0;
  opacity: 0.7;
  transition: opacity var(--transition);
}
.footer-col a:hover { opacity: 1; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.12);
  padding-top: 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-size: 0.82rem;
  opacity: 0.6;
}
.footer-icp a { color: inherit; text-decoration: underline; opacity: 1; }
.footer-icp a:hover { opacity: 0.8; }

/* ===== 小程序引导 ===== */
.mp-guide {
  text-align: center;
  padding: 60px 24px;
}
.mp-guide p { font-size: 1rem; color: var(--muted); margin-bottom: 32px; }
.mp-code-placeholder {
  width: 160px; height: 160px;
  border: 2px dashed var(--border);
  border-radius: 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  margin: 0 auto 24px;
  gap: 8px;
  color: var(--muted);
  font-size: 0.85rem;
}
.mp-code-placeholder span { font-size: 2.5rem; }

/* ===== 关于 ===== */
.about-hero { background: linear-gradient(135deg, var(--primary), var(--primary-dark)); color: white; padding: 80px 0; }
.mission-box {
  background: linear-gradient(135deg, var(--primary), var(--accent));
  color: white;
  border-radius: var(--radius);
  padding: 60px 48px;
  text-align: center;
}
.mission-box h2 { font-size: clamp(1.4rem, 3vw, 2rem); font-weight: 700; margin-bottom: 16px; }
.mission-box p { font-size: 1rem; opacity: 0.85; }

/* ===== 入场动画 ===== */
.fade-up {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.fade-up.visible { opacity: 1; transform: none; }

/* ===== 响应式 ===== */
@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 768px) {
  .nav-links, .nav-cta { display: none; }
  .nav-toggle { display: flex; }
  .grid-3, .grid-2 { grid-template-columns: 1fr; }
  .grid-4 { grid-template-columns: 1fr 1fr; }
  .steps { flex-direction: column; align-items: center; }
  .step:not(:last-child)::after { display: none; }
  .banner { flex-direction: column; text-align: center; }
  .section { padding: 56px 0; }
  .hero { padding: 80px 0 60px; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}
@media (max-width: 480px) {
  .grid-4 { grid-template-columns: 1fr; }
  .hero-actions { flex-direction: column; align-items: center; }
  .price-card.featured { transform: scale(1); }
}