/* ============================================================
   Petcell 派德塞尔 官网样式
   品牌色（取自官方 Logo）：
   - 炭灰主色   #3B3B3B / #454545 （文字、图形主体）
   - 青蓝科技色 #45B8C8 / #56C7D8 （分子结构、医疗科技点缀）
   风格：优雅流动 · 现代简约 · 有温度的医疗科技
   ============================================================ */

:root {
  --ink: #3B3B3B;            /* 主文字/标题 炭灰 */
  --ink-soft: #5A5A5A;       /* 次级文字 */
  --ink-faint: #8A8A8A;      /* 弱文字 */
  --teal: #45B8C8;           /* 品牌青蓝 主色 */
  --teal-deep: #2E9BAE;      /* 青蓝 hover/深 */
  --teal-light: #56C7D8;     /* 青蓝亮色 */
  --teal-soft: #E8F6F8;      /* 青蓝极浅背景 */
  --bg: #FFFFFF;
  --bg-alt: #F7FAFB;
  --line: #E8ECED;
  --radius: 14px;
  --shadow: 0 6px 24px rgba(59,59,59,.08);
  --font: -apple-system, "PingFang SC", "Microsoft YaHei", "Segoe UI", Roboto, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  color: var(--ink);
  background: var(--bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
.container { max-width: 1100px; margin: 0 auto; padding: 0 24px; }
a { color: var(--teal-deep); text-decoration: none; }
a:hover { color: var(--teal); }
img { max-width: 100%; }

/* ===== 导航 ===== */
.nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.94);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.nav-inner { display: flex; align-items: center; justify-content: space-between; height: 68px; }
.logo { display: flex; align-items: center; gap: 10px; color: var(--ink); }
.logo img.logo-img { height: 40px; width: auto; }
.logo-text { font-size: 22px; font-weight: 700; letter-spacing: .3px; color: var(--ink); }
.logo-text small { display: block; font-size: 11px; font-weight: 400; color: var(--ink-faint); letter-spacing: 2px; }
.menu { display: flex; align-items: center; gap: 26px; }
.menu a { color: var(--ink-soft); font-size: 15px; font-weight: 500; }
.menu a:hover, .menu a.active { color: var(--teal-deep); }
.nav-right { display: flex; align-items: center; gap: 12px; }
.lang-toggle {
  border: 1px solid var(--line); background: #fff; color: var(--ink);
  border-radius: 20px; padding: 5px 14px; font-size: 13px; cursor: pointer;
  font-family: var(--font); transition: all .2s;
}
.lang-toggle:hover { border-color: var(--teal); color: var(--teal-deep); }
.menu-toggle { display: none; background: none; border: none; font-size: 24px; cursor: pointer; color: var(--ink); }

/* ===== 按钮 ===== */
.btn {
  display: inline-block; padding: 12px 26px; border-radius: 30px;
  font-size: 15px; font-weight: 600; font-family: var(--font);
  cursor: pointer; transition: all .25s; border: 2px solid transparent;
}
.btn-sm { padding: 7px 16px; font-size: 13px; }
.btn-primary { background: var(--teal); color: #fff; }
.btn-primary:hover { background: var(--teal-deep); color: #fff; transform: translateY(-1px); }
.btn-outline { background: transparent; color: #fff; border-color: rgba(255,255,255,.7); }
.btn-outline:hover { background: rgba(255,255,255,.15); color: #fff; }
.btn-light { background: #fff; color: var(--teal-deep); }
.btn-light:hover { background: var(--teal-soft); color: var(--teal-deep); }

/* ===== Hero ===== */
.hero {
  background: linear-gradient(135deg, #FFFFFF 0%, var(--teal-soft) 60%, #D9F1F5 100%);
  padding: 100px 0 80px;
  position: relative; overflow: hidden;
}
.hero::after {
  content: ""; position: absolute; right: -80px; top: -80px; width: 340px; height: 340px;
  background: radial-gradient(circle, rgba(69,184,200,.12) 0%, transparent 70%);
  pointer-events: none;
}
.hero-title { font-size: 46px; font-weight: 800; line-height: 1.3; letter-spacing: .5px; }
.hero-title span { display: block; }
.hero-logo { margin-bottom: 26px; }
.hero-logo img { height: 64px; width: auto; }
.hero-sub {
  margin: 22px 0 34px; font-size: 18px; color: var(--ink-soft);
  max-width: 640px;
}
.hero-cta { display: flex; gap: 14px; flex-wrap: wrap; }

/* ===== 数据亮点 ===== */
.stats { background: var(--ink); color: #fff; padding: 40px 0; }
.stats-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 24px; text-align: center; }
.stat-num { font-size: 30px; font-weight: 800; color: var(--teal-light); }
.stat-label { font-size: 12.5px; color: rgba(255,255,255,.78); margin-top: 6px; line-height: 1.5; }

/* ===== 通用区块 ===== */
.section { padding: 84px 0; }
.section-alt { background: var(--bg-alt); }
.section-title { font-size: 32px; font-weight: 800; text-align: center; margin-bottom: 12px; }
.section-sub { text-align: center; color: var(--ink-faint); font-size: 16px; max-width: 640px; margin: 0 auto 52px; }

/* ===== 卡片 ===== */
.cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; }
.card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 34px 28px; transition: all .3s;
}
.card:hover { box-shadow: var(--shadow); transform: translateY(-4px); border-color: var(--teal-light); }
.card-icon { font-size: 38px; margin-bottom: 16px; }
.card h3 { font-size: 19px; margin-bottom: 12px; }
.card p { color: var(--ink-soft); font-size: 14.5px; margin-bottom: 14px; }
.card-list { list-style: none; }
.card-list li { position: relative; padding-left: 20px; font-size: 14px; color: var(--ink-soft); margin-bottom: 8px; }
.card-list li::before { content: "✓"; position: absolute; left: 0; color: var(--teal); font-weight: 700; }

/* ===== B2B2C 流程 ===== */
.model-flow {
  display: flex; align-items: center; justify-content: center; gap: 20px;
  flex-wrap: wrap; margin: 36px 0 24px;
}
.model-step {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px 30px; text-align: center; min-width: 170px;
}
.model-step strong { display: block; font-size: 17px; margin-bottom: 4px; color: var(--ink); }
.model-step span { font-size: 13px; color: var(--ink-faint); }
.model-arrow { color: var(--teal); font-size: 26px; font-weight: 700; }
.model-note { text-align: center; color: var(--ink-soft); font-size: 15px; }

/* ===== CTA ===== */
.cta {
  background: linear-gradient(120deg, var(--teal-deep) 0%, var(--teal) 60%, var(--teal-light) 100%);
  padding: 70px 0; text-align: center; color: #fff;
}
.cta h2 { font-size: 30px; margin-bottom: 12px; }
.cta p { color: rgba(255,255,255,.9); margin-bottom: 30px; font-size: 16px; }
.cta .hero-cta { justify-content: center; }

/* ===== 页脚 ===== */
.footer { background: #2E3334; color: rgba(255,255,255,.75); padding: 56px 0 24px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1.2fr; gap: 40px; margin-bottom: 36px; }
.footer .logo-text { color: #fff; }
.footer-logo { margin-bottom: 10px; }
.footer-about { font-size: 14px; color: rgba(255,255,255,.6); max-width: 260px; }
.footer h4 { color: #fff; font-size: 15px; margin-bottom: 14px; }
.footer ul { list-style: none; }
.footer li { margin-bottom: 10px; font-size: 14px; }
.footer a { color: rgba(255,255,255,.7); }
.footer a:hover { color: var(--teal-light); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.14); padding-top: 20px;
  display: flex; justify-content: space-between; flex-wrap: wrap; gap: 8px;
  font-size: 12.5px; color: rgba(255,255,255,.45);
}

/* ===== 响应式 ===== */
@media (max-width: 900px) {
  .cards { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 18px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .hero-title { font-size: 34px; }
  .menu {
    display: none; position: absolute; top: 68px; left: 0; right: 0;
    background: #fff; flex-direction: column; padding: 20px 24px;
    border-bottom: 1px solid var(--line); gap: 16px; align-items: flex-start;
  }
  .menu.open { display: flex; }
  .menu-toggle { display: block; }
}

/* ============================================================
   内页样式（technology / pipeline / clinical / contact）
   ============================================================ */

/* 页头 */
.page-hero {
  background: linear-gradient(135deg, #FFFFFF 0%, var(--teal-soft) 70%, #D9F1F5 100%);
  padding: 70px 0 56px; text-align: center;
}
.page-hero h1 { font-size: 38px; font-weight: 800; }
.page-hero p { color: var(--ink-soft); font-size: 17px; margin-top: 12px; }

/* 左右分栏 */
.split { display: grid; grid-template-columns: 1.2fr .8fr; gap: 48px; align-items: center; }
.split.reverse .split-text { order: 2; }
.split.reverse .split-card { order: 1; }

/* 标签 */
.tag {
  display: inline-block; background: var(--teal-soft); color: var(--teal-deep);
  border-radius: 20px; padding: 4px 14px; font-size: 13px; font-weight: 600;
  margin-bottom: 14px;
}
.split-text h2 { font-size: 28px; margin-bottom: 16px; line-height: 1.4; }
.split-text p { color: var(--ink-soft); font-size: 15.5px; margin-bottom: 18px; }

/* 勾选清单 */
.checklist { list-style: none; }
.checklist li {
  position: relative; padding-left: 26px; font-size: 15px; color: var(--ink-soft);
  margin-bottom: 12px;
}
.checklist li::before {
  content: "✓"; position: absolute; left: 0; top: 0;
  width: 18px; height: 18px; border-radius: 50%;
  background: var(--teal); color: #fff; font-size: 11px;
  display: flex; align-items: center; justify-content: center;
}
.checklist-inline { margin-top: 20px; }

/* 数据卡 */
.spec-box {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 30px 26px; box-shadow: var(--shadow);
}
.spec-box.highlight { background: linear-gradient(150deg, var(--teal-deep), var(--teal)); color: #fff; border: none; }
.spec-box h4 { margin-bottom: 16px; font-size: 16px; }
.spec-box.highlight h4 { color: #fff; }
.spec-table { width: 100%; border-collapse: collapse; }
.spec-table td { padding: 10px 4px; border-bottom: 1px solid var(--line); font-size: 14.5px; }
.spec-table td:last-child { text-align: right; color: var(--teal-deep); font-weight: 600; white-space: nowrap; }
.spec-table tr:last-child td { border-bottom: none; }
.big-stat { text-align: center; padding: 14px 0; border-bottom: 1px solid rgba(255,255,255,.25); }
.big-stat:last-child { border-bottom: none; }
.big-stat strong { display: block; font-size: 34px; font-weight: 800; }
.big-stat span { font-size: 13.5px; opacity: .92; }

/* 普通列表 */
.plain-list { list-style: none; }
.plain-list li { padding: 8px 0; border-bottom: 1px dashed var(--line); font-size: 14.5px; color: var(--ink-soft); }
.plain-list li:last-child { border-bottom: none; }
.note { font-size: 12.5px; color: var(--ink-faint); margin-top: 12px; line-height: 1.6; }

/* 数据表格 */
.table-wrap { overflow-x: auto; border-radius: var(--radius); border: 1px solid var(--line); }
.data-table { width: 100%; border-collapse: collapse; background: #fff; min-width: 640px; }
.data-table th {
  background: var(--ink); color: #fff; text-align: left;
  padding: 14px 18px; font-size: 14px; font-weight: 600;
}
.data-table td { padding: 14px 18px; font-size: 14.5px; border-bottom: 1px solid var(--line); color: var(--ink-soft); }
.data-table tr:last-child td { border-bottom: none; }
.data-table tr:hover td { background: var(--teal-soft); }
.table-note { font-size: 13px; color: var(--ink-faint); margin-top: 12px; }

/* 徽章 */
.badge { display: inline-block; padding: 3px 12px; border-radius: 16px; font-size: 12.5px; font-weight: 600; }
.badge-green { background: #E4F5EC; color: #1E9E63; }
.badge-blue { background: var(--teal-soft); color: var(--teal-deep); }

.cards-3 { grid-template-columns: repeat(3, 1fr); }

/* 试验横幅 */
.trial-banner {
  background: linear-gradient(135deg, var(--teal-soft) 0%, #fff 80%);
  border: 1px solid var(--teal-light); border-radius: var(--radius);
  padding: 40px;
}
.trial-banner h2 { font-size: 26px; margin-bottom: 14px; }
.trial-banner p { color: var(--ink-soft); font-size: 15.5px; max-width: 780px; }

/* Tab 切换 */
.tabs { display: flex; justify-content: center; gap: 10px; margin-bottom: 28px; }
.tab-btn {
  border: 1px solid var(--line); background: #fff; color: var(--ink-soft);
  padding: 10px 28px; border-radius: 24px; font-size: 15px; cursor: pointer;
  font-family: var(--font); transition: all .2s;
}
.tab-btn.active { background: var(--teal); color: #fff; border-color: var(--teal); }

/* 表单 */
.form-card {
  background: #fff; border: 1px solid var(--line); border-radius: var(--radius);
  padding: 34px; box-shadow: var(--shadow); max-width: 760px; margin: 0 auto;
}
.form-card h3 { margin-bottom: 22px; font-size: 19px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px 20px; margin-bottom: 24px; }
.form-grid label { display: flex; flex-direction: column; gap: 6px; font-size: 13.5px; color: var(--ink-soft); }
.form-grid label.full { grid-column: 1 / -1; }
.form-grid input, .form-grid select, .form-grid textarea {
  border: 1px solid var(--line); border-radius: 8px; padding: 10px 12px;
  font-size: 14.5px; font-family: var(--font); background: #fff; color: var(--ink);
  transition: border-color .2s; width: 100%;
}
.form-grid input:focus, .form-grid select:focus, .form-grid textarea:focus {
  outline: none; border-color: var(--teal);
}
.form-ok { margin-top: 16px; color: #1E9E63; font-weight: 600; }

/* 联系卡片 */
.contact-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px; }
.contact-item {
  text-align: center; background: #fff; border: 1px solid var(--line);
  border-radius: var(--radius); padding: 30px 18px; transition: all .3s;
}
.contact-item:hover { box-shadow: var(--shadow); transform: translateY(-3px); }
.contact-icon { font-size: 34px; margin-bottom: 12px; }
.contact-item h3 { font-size: 16px; margin-bottom: 8px; }
.contact-item p { color: var(--teal-deep); font-size: 14px; word-break: break-all; }

.company-box {
  background: var(--bg-alt); border-radius: var(--radius); padding: 36px;
  display: flex; justify-content: space-between; gap: 30px; flex-wrap: wrap;
}

/* 响应式补充 */
@media (max-width: 900px) {
  .split { grid-template-columns: 1fr; }
  .split.reverse .split-text { order: 1; }
  .split.reverse .split-card { order: 2; }
  .form-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: repeat(2, 1fr); }
  .cards-3 { grid-template-columns: 1fr; }
  .page-hero h1 { font-size: 30px; }
  .trial-banner { padding: 26px; }
}
@media (max-width: 520px) {
  .contact-grid { grid-template-columns: 1fr; }
}