/* ============================================================================
   八仙九脉康复平台 · 设计系统
   医疗信任风格：可信蓝（撮合/监管）+ 康复绿（康复/成长）
   ========================================================================== */
:root {
  --c-primary: #0E5C8A;
  --c-primary-d: #0A4A6E;
  --c-primary-l: #E3F0F7;
  --c-accent: #12A150;
  --c-accent-d: #0C7E3E;
  --c-accent-l: #E4F5EC;
  --c-ink: #16242E;
  --c-muted: #5B6B75;
  --c-bg: #FFFFFF;
  --c-soft: #F3F8FB;
  --c-soft-2: #EAF2F7;
  --c-border: #E2ECF2;
  --c-seal: #C0392B;
  --c-warn-bg: #FFF8E8;
  --c-warn-bd: #F0C36D;
  --radius: 14px;
  --radius-sm: 10px;
  --shadow: 0 6px 24px rgba(14, 92, 138, 0.08);
  --shadow-lg: 0 14px 40px rgba(14, 92, 138, 0.14);
  --maxw: 1120px;
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Helvetica Neue", Arial, sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--c-ink);
  background: var(--c-bg);
  line-height: 1.75;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}
.wrap { max-width: var(--maxw); margin: 0 auto; padding: 0 22px; }
a { color: var(--c-primary); text-decoration: none; }
a:hover { text-decoration: underline; }
h1, h2, h3 { line-height: 1.3; color: var(--c-ink); }
h1 { font-size: clamp(1.7rem, 4vw, 2.6rem); margin: 0 0 .4em; }
h2 { font-size: clamp(1.35rem, 3vw, 1.9rem); margin: 0 0 .5em; }
h3 { font-size: 1.12rem; margin: 0 0 .4em; }
p { margin: 0 0 1em; }
ul, ol { margin: 0 0 1em; padding-left: 1.2em; }
.muted { color: var(--c-muted); }
code { background: var(--c-soft-2); padding: 1px 6px; border-radius: 6px; font-size: .9em; }

/* ── 跳过链接（无障碍） ── */
.skip-link {
  position: absolute; left: -999px; top: 0; background: var(--c-primary);
  color: #fff; padding: 8px 14px; z-index: 100;
}
.skip-link:focus { left: 12px; top: 12px; }

/* ── 头部 / 导航 ── */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255,255,255,.92); backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--c-border);
}
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.brand { display: flex; align-items: center; gap: 10px; color: var(--c-ink); font-weight: 700; font-size: 1.15rem; }
.brand:hover { text-decoration: none; }
.brand-mark {
  width: 36px; height: 36px; border-radius: 9px; display: grid; place-items: center;
  background: linear-gradient(135deg, var(--c-primary), var(--c-accent)); color: #fff; font-weight: 800;
}
.brand-text small { display: block; font-size: .62rem; font-weight: 500; color: var(--c-muted); letter-spacing: 2px; }
.nav-list { list-style: none; display: flex; gap: 4px; margin: 0; padding: 0; }
.nav-list a {
  display: block; padding: 8px 13px; border-radius: 9px; color: var(--c-ink); font-size: .95rem; font-weight: 500;
}
.nav-list a:hover { background: var(--c-soft); text-decoration: none; }
.nav-list a.active { background: var(--c-primary-l); color: var(--c-primary-d); font-weight: 700; }
.nav-toggle { display: none; }

/* ── 按钮 ── */
.btn {
  display: inline-block; padding: 12px 26px; border-radius: 999px; font-weight: 700; font-size: 1rem;
  cursor: pointer; border: 2px solid transparent; transition: .18s; text-align: center;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn-primary { background: var(--c-primary); color: #fff; box-shadow: var(--shadow); }
.btn-primary:hover { background: var(--c-primary-d); }
.btn-ghost { background: #fff; color: var(--c-primary); border-color: var(--c-primary); }
.btn-ghost:hover { background: var(--c-primary-l); }

/* ── Hero ── */
.hero { padding: 64px 0 48px; background: radial-gradient(1200px 500px at 80% -10%, var(--c-primary-l), transparent), var(--c-soft); }
.hero-kicker { color: var(--c-accent-d); font-weight: 700; letter-spacing: 1px; margin: 0 0 10px; }
.hero-slogan {
  font-size: clamp(2.1rem, 6vw, 3.6rem); font-weight: 800; letter-spacing: 1px;
  background: linear-gradient(120deg, var(--c-primary), var(--c-accent)); -webkit-background-clip: text;
  background-clip: text; color: transparent; margin-bottom: .3em;
}
.hero-lead { font-size: 1.12rem; color: var(--c-muted); max-width: 760px; }
.hero-sub { padding: 52px 0 40px; }
.hero-b { background: radial-gradient(1000px 460px at 85% -20%, var(--c-accent-l), transparent), var(--c-soft); }
.hero-kb { background: var(--c-soft); }
.cta-dual { display: flex; gap: 14px; flex-wrap: wrap; margin-top: 22px; }

/* ── 通用区块 ── */
.block { padding: 54px 0; border-bottom: 1px solid var(--c-border); }
.block:last-of-type { border-bottom: none; }
.block-title { text-align: center; }
.block-sub { text-align: center; color: var(--c-muted); max-width: 720px; margin: 0 auto 34px; }
.compliance-inline {
  background: var(--c-soft); border-left: 4px solid var(--c-primary); padding: 14px 18px; border-radius: 0 10px 10px 0; color: var(--c-ink);
}

/* ── 三大机制 ── */
.mech-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.mech-card {
  background: #fff; border: 1px solid var(--c-border); border-radius: var(--radius); padding: 30px 24px; box-shadow: var(--shadow);
  transition: .2s;
}
.mech-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); border-color: var(--c-primary-l); }
.mech-ico { font-size: 2rem; margin-bottom: 10px; }
.mech-card h3 { color: var(--c-primary-d); }

/* ── 数据 ── */
.stat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.stat { background: #fff; border: 1px solid var(--c-border); border-radius: var(--radius); padding: 26px 22px; text-align: center; box-shadow: var(--shadow); }
.stat-num { display: block; font-size: 2.2rem; font-weight: 800; color: var(--c-primary); }
.stat-label { display: block; color: var(--c-muted); font-size: .92rem; margin-top: 8px; }

/* ── 双端 ── */
.dual-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.dual-card { background: var(--c-soft); border-radius: var(--radius); padding: 30px; box-shadow: var(--shadow); }
.dual-card h3 { color: var(--c-primary-d); }
.dual-card .btn { margin-top: 8px; }

/* ── 流程 / 步骤 ── */
.flow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 16px; }
.flow-step { background: #fff; border: 1px solid var(--c-border); border-radius: var(--radius); padding: 22px; position: relative; }
.flow-no { display: inline-grid; place-items: center; width: 30px; height: 30px; border-radius: 50%; background: var(--c-primary); color: #fff; font-weight: 800; margin-bottom: 10px; }
.split { display: grid; grid-template-columns: 1fr 1fr; gap: 22px; }
.split-col { background: var(--c-soft); border-radius: var(--radius); padding: 26px; }
.split-col h3 { color: var(--c-accent-d); }

/* ── 阶梯 ── */
.ladder { list-style: none; padding: 0; margin: 0; counter-reset: step; display: grid; gap: 14px; }
.ladder-step { display: flex; gap: 16px; align-items: flex-start; background: #fff; border: 1px solid var(--c-border); border-radius: var(--radius); padding: 18px 22px; box-shadow: var(--shadow); }
.ladder-no { flex: 0 0 34px; height: 34px; border-radius: 50%; background: linear-gradient(135deg,var(--c-primary),var(--c-accent)); color: #fff; font-weight: 800; display: grid; place-items: center; }
.ladder-step h3 { margin: 0 0 4px; color: var(--c-primary-d); }

/* ── 政策 ── */
.policy-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 20px; }
.policy { background: var(--c-accent-l); border-radius: var(--radius); padding: 24px; }
.policy h3 { color: var(--c-accent-d); }

/* ── FAQ ── */
.faq-list { display: grid; gap: 12px; }
.faq-item { background: #fff; border: 1px solid var(--c-border); border-radius: var(--radius); padding: 4px 20px; box-shadow: var(--shadow); }
.faq-item summary { cursor: pointer; font-weight: 700; padding: 14px 0; color: var(--c-ink); }
.faq-a { padding: 0 0 16px; color: var(--c-muted); }

/* ── HowTo ── */
.howto { list-style: none; padding: 0; margin: 0; display: grid; gap: 14px; counter-reset: ht; }
.howto-step { display: flex; gap: 16px; background: #fff; border: 1px solid var(--c-border); border-radius: var(--radius); padding: 18px 22px; box-shadow: var(--shadow); }
.howto-no { flex: 0 0 34px; height: 34px; border-radius: 50%; background: var(--c-accent); color: #fff; font-weight: 800; display: grid; place-items: center; }
.howto-step h3 { margin: 0 0 4px; color: var(--c-accent-d); }

/* ── 闭环 ── */
.loop { display: flex; flex-wrap: wrap; align-items: center; justify-content: center; gap: 10px; margin: 10px 0 18px; }
.loop-node { background: var(--c-primary-l); border: 1px solid var(--c-primary-l); border-radius: 12px; padding: 16px 18px; text-align: center; font-weight: 700; color: var(--c-primary-d); min-width: 130px; }
.loop-node small { display: block; font-weight: 500; color: var(--c-muted); font-size: .8rem; margin-top: 4px; }
.loop-arrow { color: var(--c-accent); font-weight: 800; font-size: 1.3rem; }

/* ── 资质 / E-E-A-T ── */
.qual-list { list-style: none; padding: 0; display: grid; gap: 10px; }
.qual-list li { background: var(--c-soft); border-radius: var(--radius-sm); padding: 14px 18px; }
.eeta { display: grid; grid-template-columns: repeat(4,1fr); gap: 16px; }
.eeta-item { background: #fff; border: 1px solid var(--c-border); border-radius: var(--radius); padding: 20px; box-shadow: var(--shadow); }
.eeta-item h3 { color: var(--c-primary-d); }

/* ── 知识库 ── */
.kb-isolate-note {
  background: var(--c-warn-bg); border: 1px solid var(--c-warn-bd); color: #7a5a00;
  padding: 12px 22px; font-size: .92rem; text-align: center;
}
.kb-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }
.kb-card { background: #fff; border: 1px solid var(--c-border); border-radius: var(--radius); padding: 22px; box-shadow: var(--shadow); display: flex; flex-direction: column; }
.kb-card h3 { font-size: 1.05rem; }
.kb-card h3 a { color: var(--c-ink); }
.kb-cat { color: var(--c-accent-d); font-size: .82rem; font-weight: 700; margin: 0 0 6px; }
.kb-tier { align-self: flex-start; font-size: .72rem; font-weight: 700; padding: 2px 9px; border-radius: 999px; margin-bottom: 8px; }
.tier-1 { background: #FDE8E6; color: #A3322A; }
.tier-2 { background: #E6F0FD; color: #1F5FB0; }
.tier-3 { background: var(--c-accent-l); color: var(--c-accent-d); }
.kb-foot { font-size: .78rem; color: var(--c-muted); margin-top: auto; padding-top: 10px; }
.article-meta { color: var(--c-muted); font-size: .85rem; margin-bottom: 18px; }

/* ── 表单 ── */
.apply-form { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; max-width: 760px; }
.field { display: flex; flex-direction: column; gap: 6px; }
.field-full { grid-column: 1 / -1; }
.field label { font-weight: 600; font-size: .92rem; }
.field input, .field select, .field textarea {
  padding: 11px 13px; border: 1px solid var(--c-border); border-radius: var(--radius-sm); font: inherit; background: #fff; color: var(--c-ink);
}
.field input:focus, .field select:focus, .field textarea:focus { outline: 2px solid var(--c-primary-l); border-color: var(--c-primary); }
.agree label { font-weight: 400; display: flex; gap: 8px; align-items: flex-start; }
.form-note { font-weight: 700; min-height: 1.2em; margin: 4px 0 0; }
.form-note.ok { color: var(--c-accent-d); }
.form-note.err { color: var(--c-seal); }

/* ── 信源标签 / 内容溯源 ── */
.source-tag { font-size: .85rem; color: var(--c-muted); border-top: 1px dashed var(--c-border); padding-top: 12px; margin-top: 18px; }
.source-tier { display: inline-block; background: var(--c-primary-l); color: var(--c-primary-d); font-weight: 700; padding: 1px 9px; border-radius: 999px; margin-right: 6px; font-size: .8rem; }

/* ── 页脚 ── */
.site-footer { background: var(--c-ink); color: #cdd9e1; padding: 38px 0 30px; margin-top: 0; }
.site-footer .wrap { display: grid; gap: 16px; }
.footer-compliance { background: rgba(255,255,255,.06); border-left: 4px solid var(--c-accent); padding: 14px 18px; border-radius: 0 10px 10px 0; color: #eaf2f7; }
.footer-meta { display: flex; flex-wrap: wrap; gap: 14px 26px; font-size: .85rem; color: #9fb1bd; }
.footer-meta code { background: rgba(255,255,255,.1); color: #fff; }
.footer-links { display: flex; flex-wrap: wrap; gap: 8px 18px; font-size: .9rem; }
.footer-links a { color: #bcd2df; }
.copyright { font-size: .82rem; color: #7e92a0; margin: 0; }

/* ── 响应式 ── */
@media (max-width: 900px) {
  .mech-grid, .stat-grid, .policy-grid, .kb-grid, .eeta { grid-template-columns: 1fr 1fr; }
  .flow { grid-template-columns: 1fr 1fr; }
  .dual-grid, .split { grid-template-columns: 1fr; }
}
@media (max-width: 640px) {
  .nav-toggle { display: inline-block; background: var(--c-primary); color: #fff; border: none; padding: 8px 14px; border-radius: 8px; font-weight: 700; }
  .nav-list { display: none; position: absolute; top: 64px; left: 0; right: 0; background: #fff; flex-direction: column; padding: 10px 22px; box-shadow: var(--shadow-lg); border-bottom: 1px solid var(--c-border); }
  .nav-list.open { display: flex; }
  .mech-grid, .stat-grid, .policy-grid, .kb-grid, .eeta, .flow, .apply-form { grid-template-columns: 1fr; }
  .hero { padding: 44px 0 34px; }
}