/* =====================================================
   上海皓鹏牙科工作室 · 设计令牌 + 全站样式
   色调：墨青/深松绿主色 · 象牙白底 · 铜金 CTA
   断点：375 / 768 / 1200
   变量命名与《建站开发方案》第六章设计令牌表一致
   ===================================================== */

:root {
  --color-primary: #14524a;
  --color-primary-dark: #0d3b35;
  --color-primary-soft: #e3efec;
  --color-accent: #c98a3d;
  --color-accent-dark: #a76f2c;
  --color-bg: #faf8f4;
  --color-surface: #ffffff;
  --color-text: #22302e;
  --color-muted: #5d6b68;
  --color-border: #e3ded4;
  --color-danger: #b3423a;
  --radius: 12px;
  --radius-lg: 18px;
  --shadow: 0 2px 10px rgba(20, 60, 54, 0.08);
  --shadow-lg: 0 10px 30px rgba(20, 60, 54, 0.12);
  --font: "PingFang SC", "Noto Sans SC", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
  --maxw: 1200px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: var(--font);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; height: auto; }
a { color: var(--color-primary); }
ul { list-style: none; }

.container { max-width: var(--maxw); margin: 0 auto; padding: 0 20px; }
.sr-only {
  position: absolute; width: 1px; height: 1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap;
}
.skip-link {
  position: absolute; left: -999px; top: 0; background: var(--color-primary);
  color: #fff; padding: 8px 16px; z-index: 200; border-radius: 0 0 8px 0;
}
.skip-link:focus { left: 0; }
:focus-visible { outline: 3px solid var(--color-accent); outline-offset: 2px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-block; padding: 10px 22px; border-radius: 999px;
  font-weight: 600; text-decoration: none; border: 2px solid transparent;
  cursor: pointer; font-size: 15px; transition: all 0.2s ease;
  font-family: inherit; line-height: 1.5;
}
.btn-primary { background: var(--color-accent); color: #fff; }
.btn-primary:hover { background: var(--color-accent-dark); transform: translateY(-1px); }
.btn-ghost { background: transparent; color: var(--color-primary); border-color: var(--color-primary); }
.btn-ghost:hover { background: var(--color-primary-soft); }
.btn-lg { padding: 13px 28px; font-size: 16px; }
.btn-block { display: block; width: 100%; text-align: center; }
.text-link { color: var(--color-primary); font-weight: 600; text-decoration: none; }
.text-link:hover { text-decoration: underline; }
.center { text-align: center; margin-top: 28px; }

/* ---------- 头部导航 ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(250, 248, 244, 0.96); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; min-height: 68px; gap: 16px; }
.brand { display: flex; align-items: center; gap: 10px; text-decoration: none; color: var(--color-text); }
.brand-mark {
  width: 42px; height: 42px; border-radius: 12px; background: var(--color-primary);
  color: #fff; display: grid; place-items: center; font-size: 20px; font-weight: 700; flex: none;
}
.brand-text strong { display: block; font-size: 16px; line-height: 1.3; }
.brand-text small { display: block; font-size: 12px; color: var(--color-muted); }

.nav-toggle {
  display: none; background: none; border: none; cursor: pointer;
  width: 42px; height: 42px; flex-direction: column; justify-content: center; gap: 5px; padding: 8px;
}
.nav-toggle span { display: block; height: 2px; background: var(--color-primary); border-radius: 2px; }

.site-nav > ul { display: flex; align-items: center; gap: 4px; }
.site-nav > ul > li { position: relative; }
.site-nav a { display: block; padding: 10px 12px; text-decoration: none; color: var(--color-text); font-size: 15px; border-radius: 8px; }
.site-nav a:hover, .site-nav a[aria-current="page"] { color: var(--color-primary); background: var(--color-primary-soft); }
.sub-toggle {
  background: none; border: none; font: inherit; color: var(--color-text); cursor: pointer;
  padding: 10px 12px; border-radius: 8px; display: flex; align-items: center; gap: 4px; font-size: 15px;
}
.sub-toggle:hover { color: var(--color-primary); background: var(--color-primary-soft); }
.caret { font-size: 11px; color: var(--color-muted); }
/* 下拉子菜单：用 .site-nav 前缀提高特异性，避免被 .site-nav > ul 的 flex 覆盖 */
.site-nav ul.sub-menu {
  display: none; position: absolute; top: 100%; left: 0; min-width: 220px;
  background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius);
  box-shadow: var(--shadow-lg); padding: 8px; z-index: 110; flex-direction: column; align-items: stretch; gap: 0;
}
.site-nav ul.sub-menu a { padding: 9px 12px; font-size: 14px; }
.site-nav .has-sub:hover > ul.sub-menu,
.site-nav .has-sub:focus-within > ul.sub-menu { display: flex; }
.site-nav .has-sub.open > ul.sub-menu { display: flex; }
.nav-cta { display: none; }

/* ---------- Hero ---------- */
.hero { padding: 56px 0 40px; background: linear-gradient(180deg, var(--color-primary-soft) 0%, var(--color-bg) 100%); }
.hero-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: 40px; align-items: center; }
.eyebrow {
  color: var(--color-accent-dark); font-weight: 700; letter-spacing: 0.12em;
  font-size: 13px; text-transform: uppercase; margin-bottom: 14px;
}
.hero h1 { font-size: clamp(28px, 4vw, 44px); line-height: 1.25; color: var(--color-primary-dark); margin-bottom: 16px; }
.hero-sub { font-size: 17px; color: var(--color-muted); margin-bottom: 24px; max-width: 34em; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-bottom: 16px; }
.hero-note { font-size: 13px; color: var(--color-muted); }
.hero-media { position: relative; }
.hero-media img { border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); aspect-ratio: 3/2; object-fit: cover; }
.hero-badge {
  position: absolute; left: 12px; bottom: 12px; background: rgba(13, 59, 53, 0.85);
  color: #fff; font-size: 12px; padding: 5px 12px; border-radius: 999px;
}

/* ---------- 通用 Section ---------- */
.section { padding: 64px 0; }
.section-alt { background: var(--color-surface); border-top: 1px solid var(--color-border); border-bottom: 1px solid var(--color-border); }
.section-title { font-size: clamp(22px, 3vw, 30px); color: var(--color-primary-dark); margin-bottom: 8px; }
.section-sub { color: var(--color-muted); max-width: 46em; margin-bottom: 32px; }
.grid { display: grid; gap: 20px; }

/* ---------- 症状六宫格 ---------- */
.grid-6 { grid-template-columns: repeat(3, 1fr); }
.symptom-card {
  background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius);
  padding: 20px; text-decoration: none; color: var(--color-text); transition: all 0.2s ease;
  display: flex; flex-direction: column; gap: 6px; box-shadow: var(--shadow);
}
.symptom-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-lg); border-color: var(--color-primary); }
.symptom-ico { font-size: 26px; }
.symptom-card strong { font-size: 17px; color: var(--color-primary-dark); }
.symptom-card span:last-child { font-size: 13px; color: var(--color-muted); }

/* ---------- 服务范围 ---------- */
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.scope-card {
  background: var(--color-bg); border: 1px solid var(--color-border); border-radius: var(--radius-lg);
  padding: 26px;
}
.scope-card h3 { color: var(--color-primary-dark); font-size: 19px; margin-bottom: 14px; }
.scope-card ul { margin-bottom: 16px; }
.scope-card li { padding: 6px 0 6px 20px; position: relative; font-size: 14.5px; }
.scope-card li::before { content: "✓"; position: absolute; left: 0; color: var(--color-accent); font-weight: 700; }

/* ---------- 医生卡 ---------- */
.dentist-card {
  background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg);
  padding: 26px; text-align: center; box-shadow: var(--shadow);
}
.dentist-avatar {
  width: 72px; height: 72px; border-radius: 50%; background: var(--color-primary-soft);
  color: var(--color-primary-dark); display: grid; place-items: center; font-size: 28px; font-weight: 700;
  margin: 0 auto 14px;
}
.dentist-card h3 small { display: block; font-size: 11px; color: var(--color-accent-dark); font-weight: 600; }
.dentist-role { color: var(--color-accent-dark); font-size: 13px; font-weight: 600; margin: 4px 0 10px; }
.dentist-card p:not(.dentist-role) { font-size: 14px; color: var(--color-muted); text-align: left; }

/* ---------- 流程四步 ---------- */
.steps { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; list-style: none; }
.steps li { background: var(--color-bg); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: 24px 20px; }
.step-num {
  display: inline-grid; place-items: center; width: 34px; height: 34px; border-radius: 50%;
  background: var(--color-primary); color: #fff; font-weight: 700; margin-bottom: 12px;
}
.steps h3 { font-size: 17px; color: var(--color-primary-dark); margin-bottom: 6px; }
.steps p { font-size: 14px; color: var(--color-muted); }

/* ---------- 费用表 ---------- */
.table-wrap { overflow-x: auto; border-radius: var(--radius); box-shadow: var(--shadow); background: var(--color-surface); }
.fee-table { width: 100%; border-collapse: collapse; min-width: 640px; }
.fee-table th, .fee-table td { padding: 14px 18px; text-align: left; border-bottom: 1px solid var(--color-border); }
.fee-table th { background: var(--color-primary-dark); color: #fff; font-weight: 600; white-space: nowrap; }
.fee-table tbody tr:last-child td { border-bottom: none; }
.fee-table tbody tr:nth-child(even) { background: var(--color-bg); }
.fee-table td { font-variant-numeric: tabular-nums; }
.fee-table td:last-child { font-weight: 600; color: var(--color-primary-dark); }
.fee-note { font-size: 13px; color: var(--color-muted); margin-top: 14px; }

/* ---------- 感控 ---------- */
.hygiene-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: 40px; align-items: center; }
.hygiene-list { margin: 8px 0 20px; counter-reset: hyg; list-style: none; }
.hygiene-list li { padding: 8px 0 8px 30px; position: relative; font-size: 15px; }
.hygiene-list li::before {
  counter-increment: hyg; content: counter(hyg);
  width: 22px; height: 22px; border-radius: 50%; background: var(--color-primary-soft);
  color: var(--color-primary-dark); display: grid; place-items: center; font-size: 12px; font-weight: 700;
  position: absolute; left: 0; top: 11px;
}
.hygiene figure img { border-radius: var(--radius-lg); box-shadow: var(--shadow-lg); aspect-ratio: 3/2; object-fit: cover; }
.hygiene figcaption { font-size: 12px; color: var(--color-muted); margin-top: 8px; }

/* ---------- 评价 ---------- */
.review-card {
  background: var(--color-surface); border: 1px solid var(--color-border); border-left: 4px solid var(--color-accent);
  border-radius: var(--radius); padding: 22px;
}
.review-card p { font-size: 15px; margin-bottom: 12px; }
.review-card footer { font-size: 13px; color: var(--color-muted); }

/* ---------- 科普 ---------- */
.post-card {
  background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg);
  padding: 24px; display: flex; flex-direction: column; gap: 10px; transition: all 0.2s ease;
}
.post-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-2px); }
.post-tag {
  align-self: flex-start; font-size: 12px; font-weight: 700; color: var(--color-primary-dark);
  background: var(--color-primary-soft); padding: 3px 10px; border-radius: 999px;
}
.post-card h3 { font-size: 17px; line-height: 1.5; }
.post-card h3 a { color: var(--color-text); text-decoration: none; }
.post-card h3 a:hover { color: var(--color-primary); }
.post-card p { font-size: 14px; color: var(--color-muted); flex: 1; }
.post-card footer { font-size: 12.5px; color: var(--color-muted); border-top: 1px dashed var(--color-border); padding-top: 10px; }

/* ---------- 位置与预约 ---------- */
.visit { background: linear-gradient(180deg, var(--color-primary-soft), var(--color-bg)); }
.visit-grid { display: grid; grid-template-columns: 1.1fr 1fr; gap: 40px; align-items: start; }
.visit-meta { margin-bottom: 20px; }
.visit-meta li { padding: 6px 0; font-size: 15px; border-bottom: 1px dashed var(--color-border); }
.map-block {
  background: var(--color-surface); border: 1px dashed var(--color-primary); border-radius: var(--radius);
  min-height: 200px; display: grid; place-items: center; text-align: center; color: var(--color-muted);
  margin-bottom: 28px; padding: 20px;
}
.faq h3 { margin-bottom: 12px; color: var(--color-primary-dark); }
.faq details {
  background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius);
  margin-bottom: 10px; overflow: hidden;
}
.faq summary { cursor: pointer; padding: 14px 18px; font-weight: 600; font-size: 15px; list-style-position: inside; }
.faq summary:hover { background: var(--color-primary-soft); }
.faq details[open] summary { border-bottom: 1px solid var(--color-border); }
.faq details p { padding: 12px 18px; font-size: 14.5px; color: var(--color-muted); }

.booking-card {
  background: var(--color-surface); border-radius: var(--radius-lg); padding: 28px;
  box-shadow: var(--shadow-lg); border-top: 4px solid var(--color-accent);
}
.booking-card h3 { font-size: 20px; color: var(--color-primary-dark); margin-bottom: 6px; }
.booking-note { font-size: 13.5px; color: var(--color-muted); margin-bottom: 18px; }
.booking-card label { display: block; font-size: 14px; font-weight: 600; margin-bottom: 14px; }
.booking-card input, .booking-card select, .booking-card textarea {
  width: 100%; margin-top: 6px; padding: 11px 12px; border: 1px solid var(--color-border);
  border-radius: 8px; font: inherit; font-size: 15px; background: var(--color-bg);
}
.booking-card input:focus, .booking-card select:focus, .booking-card textarea:focus {
  border-color: var(--color-primary); outline: none; background: #fff;
}
.booking-card input.invalid { border-color: var(--color-danger); }
.booking-card .btn { margin-top: 4px; }
.form-result { margin-top: 12px; font-size: 14.5px; font-weight: 600; color: var(--color-primary-dark); min-height: 1.5em; }
.form-result.ok { color: #1d7a4f; }
.form-result.err { color: var(--color-danger); }
.booking-alt { margin-top: 10px; font-size: 13.5px; color: var(--color-muted); text-align: center; }

/* ---------- 页脚 ---------- */
.site-footer { background: var(--color-primary-dark); color: #cfe0dc; padding: 48px 0 0; margin-top: 0; }
.footer-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; padding-bottom: 36px; }
.site-footer h3 { color: #fff; font-size: 15px; margin-bottom: 14px; }
.site-footer ul li { margin-bottom: 8px; }
.site-footer a { color: #cfe0dc; text-decoration: none; font-size: 14px; }
.site-footer a:hover { color: #fff; text-decoration: underline; }
.footer-nap p { font-size: 13.5px; margin-bottom: 6px; }
.footer-disclaimer { font-size: 12px; opacity: 0.75; margin-top: 12px; }
.footer-bottom { border-top: 1px solid rgba(255, 255, 255, 0.12); padding: 16px 0; }
.footer-bottom p { font-size: 12.5px; opacity: 0.7; }

/* ---------- 吸底 CTA（移动端） ---------- */
.sticky-cta {
  display: none; position: fixed; left: 16px; right: 16px; bottom: 16px; z-index: 90;
  background: var(--color-accent); color: #fff; text-align: center; padding: 14px;
  border-radius: 999px; font-weight: 700; text-decoration: none; box-shadow: var(--shadow-lg);
}

/* ---------- 滚动显现 ---------- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; transition: none; }
  html { scroll-behavior: auto; }
}

/* ---------- 平板 768 ---------- */
@media (max-width: 1024px) {
  .hero-grid, .visit-grid, .hygiene-grid { grid-template-columns: 1fr; }
  .hero { padding-top: 40px; }
  .grid-3 { grid-template-columns: repeat(2, 1fr); }
  .steps { grid-template-columns: repeat(2, 1fr); }
}

/* ---------- 移动 375 ---------- */
@media (max-width: 768px) {
  .section { padding: 44px 0; }
  .nav-toggle { display: flex; }
  .site-nav {
    display: none; position: absolute; top: 100%; left: 0; right: 0;
    background: var(--color-surface); border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg); padding: 12px 20px 20px; max-height: calc(100vh - 68px); overflow-y: auto;
  }
  .site-nav.open { display: block; }
  .site-nav > ul { flex-direction: column; align-items: stretch; gap: 0; }
  .site-nav > ul > li { border-bottom: 1px solid var(--color-border); }
  .site-nav > ul > li > a, .sub-toggle { padding: 14px 4px; width: 100%; justify-content: space-between; border-radius: 0; }
  .site-nav ul.sub-menu {
    display: none; position: static; box-shadow: none; border: none; background: var(--color-bg);
    border-radius: 0; padding: 0 0 8px 12px; min-width: 0;
  }
  .site-nav .has-sub.open > ul.sub-menu { display: flex; }
  .site-nav .has-sub:hover > ul.sub-menu { display: none; }
  .site-nav .has-sub.open:hover > ul.sub-menu { display: flex; }
  .nav-cta { display: block; margin-top: 16px; }
  .nav-cta .btn { width: 100%; text-align: center; }
  .grid-6 { grid-template-columns: repeat(2, 1fr); }
  .grid-3 { grid-template-columns: 1fr; }
  .steps { grid-template-columns: 1fr; }
  .hero-actions .btn { width: 100%; text-align: center; }
  .sticky-cta { display: block; }
  body { padding-bottom: 72px; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 420px) {
  .grid-6 { grid-template-columns: 1fr 1fr; gap: 12px; }
  .symptom-card { padding: 14px; }
  .footer-grid { grid-template-columns: 1fr; gap: 24px; }
}