:root {
  --ink: #1a1a1a;
  --ink-soft: #3a3a3a;
  --muted: #6b6b6b;
  --paper: #faf8f5;
  --paper-2: #f1eee8;
  --line: #e4dfd6;
  --accent: #7a1f1f;
  --accent-2: #a67c2d;
  --green: #2f5d50;
  --white: #fff;
  --shadow: 0 8px 24px rgba(26, 26, 26, 0.08);
  --radius: 12px;
  --max: 1080px;
  --font: "Noto Sans SC", "PingFang SC", "Microsoft YaHei", "Segoe UI", sans-serif;
}
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--ink);
  background: var(--paper);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; height: auto; display: block; }
a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }
.container { width: min(100% - 2rem, var(--max)); margin-inline: auto; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(250, 248, 245, 0.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--line);
}
.header-inner {
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem; padding: 0.75rem 0; min-height: 64px;
}
.brand { display: flex; align-items: center; gap: 0.75rem; color: inherit; text-decoration: none; }
.brand:hover { text-decoration: none; }
.brand img { width: 40px; height: 40px; border-radius: 8px; }
.brand-text { display: flex; flex-direction: column; line-height: 1.2; }
.brand-text strong { font-size: 1.05rem; font-weight: 600; }
.brand-text span { font-size: 0.78rem; color: var(--muted); }

.nav-toggle {
  display: none; border: 1px solid var(--line); background: var(--white);
  border-radius: 8px; padding: 0.45rem 0.7rem; font-size: 1rem; cursor: pointer;
}
.site-nav { display: flex; align-items: center; gap: 0.25rem; }
.site-nav > a, .dropdown > summary {
  display: inline-flex; align-items: center; gap: 0.35rem;
  padding: 0.5rem 0.85rem; border-radius: 999px; color: var(--ink-soft);
  font-size: 0.95rem; list-style: none; cursor: pointer;
}
.site-nav > a:hover, .dropdown > summary:hover,
.site-nav > a[aria-current="page"] {
  background: var(--paper-2); color: var(--ink); text-decoration: none;
}
.dropdown { position: relative; }
.dropdown > summary { list-style: none; }
.dropdown > summary::-webkit-details-marker { display: none; }
.dropdown-menu {
  position: absolute; right: 0; top: calc(100% + 0.35rem);
  min-width: 240px; max-height: 70vh; overflow: auto;
  background: var(--white); border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow); padding: 0.4rem;
}
.dropdown-menu a {
  display: block; padding: 0.55rem 0.75rem; border-radius: 8px;
  color: var(--ink-soft); font-size: 0.92rem;
}
.dropdown-menu a:hover { background: var(--paper-2); text-decoration: none; color: var(--ink); }
.dropdown-menu .group-label {
  padding: 0.55rem 0.75rem 0.2rem; font-size: 0.72rem; letter-spacing: 0.04em;
  text-transform: uppercase; color: var(--muted);
}
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 0.4rem;
  padding: 0.7rem 1.35rem; border-radius: 999px; border: none;
  background: var(--accent); color: var(--white); font-weight: 600;
  font-size: 0.95rem; text-decoration: none; cursor: pointer;
}
.btn:hover { filter: brightness(1.05); text-decoration: none; color: var(--white); }
.btn-outline {
  background: transparent; color: var(--ink); border: 1px solid var(--line);
}
.btn-wa { background: #128C7E; }
.nav-cta { margin-left: 0.35rem; }

/* Hero */
.hero {
  position: relative; min-height: 420px; display: grid; place-items: center;
  color: var(--white); text-align: center; overflow: hidden;
}
.hero.compact { min-height: 280px; }
.hero-bg {
  position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover;
}
.hero-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(0,0,0,0.45), rgba(0,0,0,0.55));
}
.hero-content { position: relative; z-index: 1; padding: 3rem 1rem; }
.hero h1 {
  margin: 0 0 0.6rem; font-size: clamp(2rem, 5vw, 3.4rem); font-weight: 300; letter-spacing: 0.04em;
}
.hero p { margin: 0; font-size: clamp(1.05rem, 2.5vw, 1.45rem); opacity: 0.95; }

/* Sections */
.section { padding: 4rem 0; }
.section.alt { background: var(--paper-2); }
.section.dark {
  background: var(--ink); color: var(--white); text-align: center;
}
.section-head { text-align: center; margin-bottom: 2.5rem; }
.section-head h2 { margin: 0 0 0.6rem; font-size: clamp(1.5rem, 3vw, 2rem); font-weight: 600; }
.section-head p { margin: 0; color: var(--muted); }
.section.dark .section-head p { color: rgba(255,255,255,0.75); }

.grid-3 {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem;
}
.card {
  background: var(--white); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 1.6rem; box-shadow: var(--shadow);
}
.card.center { text-align: center; }
.card .icon { font-size: 2.2rem; margin: 0 0 0.6rem; }
.card h3, .card h4 { margin: 0 0 0.6rem; font-size: 1.15rem; }
.card p { margin: 0; color: var(--ink-soft); font-size: 0.98rem; }
.card.bordered { border-color: #c9b28a; }

.split {
  display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 2rem; align-items: center;
}
.split img { width: 100%; border-radius: var(--radius); box-shadow: var(--shadow); }
.values { list-style: none; padding: 0; margin: 1rem 0 0; display: flex; gap: 0.6rem; flex-wrap: wrap; }
.values li {
  background: var(--paper-2); border: 1px solid var(--line);
  padding: 0.4rem 0.9rem; border-radius: 999px; font-weight: 600;
}

.mission-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.25rem;
}
.mission-grid .card h3 { color: var(--green); }

.contact-grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem;
}
.contact-grid ul { margin: 0.6rem 0 0; padding-left: 1.1rem; color: var(--ink-soft); }
.prose { max-width: 720px; margin: 0 auto 2rem; }
.prose p { font-size: 1.05rem; line-height: 1.85; color: var(--ink-soft); }
.doctor {
  display: grid; grid-template-columns: 160px 1fr; gap: 1.5rem; align-items: start;
}
.doctor-avatar {
  width: 160px; height: 160px; border-radius: 16px; object-fit: cover;
  background: var(--paper-2); border: 1px solid var(--line);
}
.doctor h3 { margin: 0 0 0.25rem; }
.doctor .role { margin: 0 0 1rem; color: var(--muted); }
.doctor ul { margin: 0.5rem 0 0; padding-left: 1.1rem; color: var(--ink-soft); }
.tools-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(200px, 1fr)); gap: 0.85rem;
}
.tool-link {
  display: block; padding: 0.9rem 1rem; border-radius: 10px;
  background: var(--white); border: 1px solid var(--line); color: var(--ink);
}
.tool-link:hover { border-color: var(--accent-2); text-decoration: none; box-shadow: var(--shadow); }
.tool-link small { display: block; color: var(--muted); font-size: 0.8rem; margin-top: 0.2rem; }

/* Footer */
.site-footer {
  border-top: 1px solid var(--line); padding: 2rem 0 2.5rem; background: var(--white);
}
.footer-inner {
  display: flex; flex-wrap: wrap; gap: 1rem; justify-content: space-between; align-items: center;
}
.footer-inner p { margin: 0; color: var(--muted); font-size: 0.92rem; }
.footer-links { display: flex; flex-wrap: wrap; gap: 0.8rem 1.1rem; }
.footer-links a { color: var(--ink-soft); font-size: 0.92rem; }

/* 404 */
.page-404 { min-height: 60vh; display: grid; place-items: center; text-align: center; padding: 3rem 1rem; }
.page-404 h1 { font-size: 3rem; margin: 0 0 0.5rem; font-weight: 300; }

@media (max-width: 860px) {
  .nav-toggle { display: inline-flex; }
  .site-nav {
    display: none; position: absolute; left: 0; right: 0; top: 100%;
    flex-direction: column; align-items: stretch; gap: 0.2rem;
    background: var(--paper); border-bottom: 1px solid var(--line);
    padding: 0.75rem 1rem 1rem;
  }
  .site-nav.open { display: flex; }
  .site-nav > a, .dropdown > summary { width: 100%; border-radius: 10px; }
  .dropdown-menu { position: static; box-shadow: none; border: none; background: transparent; max-height: none; padding: 0 0 0 0.5rem; }
  .nav-cta { margin: 0.4rem 0 0; width: 100%; justify-content: center; }
  .grid-3, .mission-grid, .contact-grid, .split, .doctor { grid-template-columns: 1fr; }
  .doctor-avatar { width: 120px; height: 120px; }
  .hero { min-height: 340px; }
  .hero.compact { min-height: 220px; }
}