:root {
  --teal-900: #0f3d44;
  --teal-700: #1f7a8c;
  --teal-500: #2a9d8f;
  --teal-100: #e6f3f1;
  --sand: #e9c46a;
  --coral: #f4a261;
  --ink: #20323a;
  --muted: #5d727b;
  --bg: #ffffff;
  --bg-alt: #f4f8f7;
  --radius: 16px;
  --shadow: 0 10px 30px rgba(15, 61, 68, .08);
  --shadow-hover: 0 16px 40px rgba(15, 61, 68, .14);
  --maxw: 1140px;
  --header-h: 68px;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; scroll-padding-top: var(--header-h); }

body {
  margin: 0;
  font-family: "PingFang SC", "Microsoft YaHei", "Hiragino Sans GB", system-ui, -apple-system, sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

.container { width: 100%; max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }

/* ---------- Header ---------- */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  height: var(--header-h);
  background: rgba(255, 255, 255, .9);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid #eef2f1;
  transition: box-shadow .25s ease, background .25s ease;
}
.site-header.scrolled { box-shadow: var(--shadow); }

.nav { display: flex; align-items: center; justify-content: space-between; height: 100%; }

.brand { display: flex; align-items: center; gap: 10px; font-weight: 700; }
.brand-mark {
  width: 38px; height: 38px; border-radius: 10px;
  background: linear-gradient(135deg, var(--teal-500), var(--teal-700));
  color: #fff; display: grid; place-items: center; font-size: 20px; font-weight: 700;
}
.brand-text { font-size: 19px; color: var(--teal-900); line-height: 1.1; display: flex; flex-direction: column; }
.brand-text small { font-size: 11px; font-weight: 400; color: var(--muted); letter-spacing: 1px; }

.nav-menu { display: flex; align-items: center; gap: 26px; }
.nav-menu a { color: var(--ink); font-size: 15px; font-weight: 500; padding: 6px 0; position: relative; transition: color .2s; }
.nav-menu a:hover { color: var(--teal-700); }
.nav-menu a::after {
  content: ""; position: absolute; left: 0; bottom: 0; height: 2px; width: 0;
  background: var(--teal-500); transition: width .2s ease;
}
.nav-menu a:hover::after { width: 100%; }
.nav-cta {
  background: var(--teal-700); color: #fff !important; padding: 8px 18px !important; border-radius: 999px;
}
.nav-cta::after { display: none; }
.nav-cta:hover { background: var(--teal-900); }

.nav-toggle { display: none; flex-direction: column; gap: 5px; background: none; border: 0; cursor: pointer; padding: 8px; }
.nav-toggle span { width: 24px; height: 2px; background: var(--ink); border-radius: 2px; transition: .25s; }
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  margin-top: var(--header-h);
  padding: 110px 0 90px;
  background:
    radial-gradient(900px 500px at 80% -10%, rgba(42,157,143,.18), transparent 60%),
    linear-gradient(180deg, var(--teal-100), #fff 70%);
  text-align: center;
}
.hero-eyebrow { color: var(--teal-700); font-weight: 600; letter-spacing: 1px; margin: 0 0 14px; }
.hero-title { font-size: clamp(28px, 5vw, 46px); line-height: 1.3; margin: 0 0 18px; color: var(--teal-900); font-weight: 800; }
.hero-sub { max-width: 640px; margin: 0 auto 30px; color: var(--muted); font-size: 17px; }
.hero-actions { display: flex; gap: 14px; justify-content: center; flex-wrap: wrap; }

.btn { display: inline-block; padding: 13px 28px; border-radius: 999px; font-weight: 600; font-size: 15px; transition: transform .15s, box-shadow .2s, background .2s; }
.btn-primary { background: var(--teal-700); color: #fff; box-shadow: 0 8px 20px rgba(31,122,140,.3); }
.btn-primary:hover { background: var(--teal-900); transform: translateY(-2px); }
.btn-ghost { background: #fff; color: var(--teal-700); border: 1.5px solid var(--teal-500); }
.btn-ghost:hover { background: var(--teal-100); transform: translateY(-2px); }

/* ---------- Sections ---------- */
.section { padding: 76px 0; }
.section-alt { background: var(--bg-alt); }
.section-head { text-align: center; max-width: 680px; margin: 0 auto 44px; }
.section-head h2 { font-size: clamp(24px, 3.4vw, 34px); color: var(--teal-900); margin: 0 0 10px; position: relative; display: inline-block; }
.section-head h2::after { content: ""; display: block; width: 54px; height: 4px; border-radius: 4px; background: var(--sand); margin: 14px auto 0; }
.section-head p { color: var(--muted); margin: 0; font-size: 16px; }

/* ---------- Grid ---------- */
.grid { display: grid; gap: 22px; }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

.card, .therapy, .expert, .voice {
  background: #fff; border-radius: var(--radius); padding: 28px 24px;
  box-shadow: var(--shadow); transition: transform .2s, box-shadow .2s;
}
.card:hover, .therapy:hover, .expert:hover { transform: translateY(-6px); box-shadow: var(--shadow-hover); }
.card h3, .therapy h3, .expert h3 { color: var(--teal-900); margin: 0 0 10px; font-size: 19px; }
.card p, .therapy p, .expert p { color: var(--muted); margin: 0; font-size: 15px; }

/* therapy */
.therapy { text-align: center; }
.therapy img { width: 80px; height: 80px; margin: 0 auto 14px; }

/* expert */
.expert { text-align: center; }
.expert img { width: 100%; height: 200px; object-fit: cover; border-radius: 12px; margin-bottom: 16px; background: var(--teal-100); }
.expert p { text-align: left; }

/* voices */
.voice { border-left: 4px solid var(--teal-500); background: #fff; }
.voice p { color: var(--ink); font-size: 15px; margin: 0 0 12px; }
.voice cite { color: var(--teal-700); font-style: normal; font-weight: 600; }

/* about */
.about-body { max-width: 820px; margin: 0 auto; text-align: center; }
.about-body p { color: var(--muted); font-size: 16px; }
.about-slogan { color: var(--teal-700) !important; font-weight: 700; font-size: 18px !important; margin-top: 22px; }

/* news */
.news-list { list-style: none; padding: 0; margin: 0; max-width: 820px; margin: 0 auto; }
.news-list li { display: flex; gap: 16px; align-items: baseline; padding: 14px 4px; border-bottom: 1px dashed #d9e4e2; }
.news-list li:last-child { border-bottom: 0; }
.news-date { color: var(--teal-500); font-weight: 700; font-size: 14px; white-space: nowrap; min-width: 84px; }
.news-list a { color: var(--ink); transition: color .2s; }
.news-list a:hover { color: var(--teal-700); }

/* contact */
.contact { background: linear-gradient(180deg, #fff, var(--teal-100)); }
.contact-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; max-width: 880px; margin: 0 auto 30px; }
.contact-item { background: #fff; border-radius: var(--radius); padding: 26px 22px; text-align: center; box-shadow: var(--shadow); }
.contact-item h3 { color: var(--teal-700); margin: 0 0 10px; font-size: 17px; }
.contact-item p { margin: 4px 0; color: var(--muted); }
.contact-item a { color: var(--teal-900); font-weight: 700; font-size: 18px; }
.contact-note { max-width: 760px; margin: 0 auto; text-align: center; color: var(--muted); font-size: 14px; background: #fff; border: 1px solid #e3ecea; border-radius: 12px; padding: 16px 20px; }

/* footer */
.site-footer { background: var(--teal-900); color: #cfe3e0; padding: 38px 0; }
.footer-inner { text-align: center; }
.footer-brand { display: inline-flex; align-items: center; gap: 10px; font-size: 18px; font-weight: 700; color: #fff; margin-bottom: 10px; }
.footer-meta { color: #9fc2bd; font-size: 14px; margin: 4px 0; }
.footer-copy { color: #7fa8a3; font-size: 13px; margin: 8px 0 0; }

/* ---------- 内页横幅 / 面包屑 ---------- */
.page-hero {
  margin-top: var(--header-h);
  padding: 64px 0 42px;
  background: radial-gradient(800px 420px at 80% -20%, rgba(42,157,143,.16), transparent 60%), linear-gradient(180deg, var(--teal-100), #fff 82%);
  text-align: center;
}
.page-hero h1 { font-size: clamp(24px, 4vw, 38px); color: var(--teal-900); margin: 0 0 10px; font-weight: 800; }
.page-hero p { color: var(--muted); margin: 0; font-size: 16px; }
.breadcrumb { font-size: 13px; color: var(--muted); margin-top: 14px; }
.breadcrumb a { color: var(--teal-700); }
.breadcrumb a:hover { text-decoration: underline; }

/* 区块“查看更多”按钮居中 */
.section-more { text-align: center; margin-top: 36px; }

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .contact-grid { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .nav-toggle { display: flex; }
  .nav-menu {
    position: absolute; top: var(--header-h); left: 0; right: 0;
    flex-direction: column; gap: 0; background: #fff; padding: 8px 0;
    box-shadow: var(--shadow); transform: translateY(-12px); opacity: 0; pointer-events: none;
    transition: .2s; border-bottom: 1px solid #eef2f1;
  }
  .nav-menu.open { transform: translateY(0); opacity: 1; pointer-events: auto; }
  .nav-menu a { width: 100%; padding: 14px 24px !important; }
  .nav-cta { margin: 8px 24px; text-align: center; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .section { padding: 56px 0; }
  .hero { padding: 80px 0 64px; }
}