/* ============================================================
   深圳市瑞荥科技有限公司 · 经方AI 官网统一样式
   医疗科技风格 · 响应式 · 无障碍
   ============================================================ */
:root{
  --teal-900:#0b3b46;
  --teal-700:#0e5c6b;
  --teal-600:#137887;
  --teal-500:#1a9aa8;
  --green-600:#1a8a6f;
  --blue-600:#2563b8;
  --ink-900:#16242c;
  --ink-700:#33484f;
  --ink-500:#5b7078;
  --ink-400:#7c8e94;
  --line:#e3eaec;
  --bg:#f6f9f9;
  --bg-soft:#eef4f4;
  --white:#ffffff;
  --accent:#0e8a7d;
  --accent-soft:#e2f3f0;
  --gold:#b8862f;
  --shadow:0 6px 24px rgba(11,59,70,.08);
  --shadow-sm:0 2px 10px rgba(11,59,70,.06);
  --radius:14px;
  --maxw:1180px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",Roboto,Helvetica,Arial,sans-serif;
  color:var(--ink-900);line-height:1.75;background:var(--white);
  -webkit-font-smoothing:antialiased;font-size:16px;
}
a{color:var(--teal-600);text-decoration:none;transition:color .2s}
a:hover{color:var(--teal-500)}
img{max-width:100%;display:block}
.container{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.eyebrow{display:inline-block;font-size:13px;letter-spacing:.14em;color:var(--accent);font-weight:700;text-transform:uppercase;margin-bottom:14px}
h1,h2,h3,h4{color:var(--teal-900);line-height:1.3;font-weight:700}
.section{padding:76px 0}
.section.alt{background:var(--bg)}
.section-head{max-width:760px;margin:0 auto 48px;text-align:center}
.section-head h2{font-size:32px;margin-bottom:14px}
.section-head p{color:var(--ink-500);font-size:17px}
.lead{font-size:18px;color:var(--ink-700)}

/* ---------- 顶部导航 ---------- */
.topbar{background:var(--teal-900);color:#cfe4e8;font-size:13px;padding:7px 0}
.topbar .container{display:flex;justify-content:space-between;gap:16px;flex-wrap:wrap}
.topbar a{color:#dceff2}
.topbar span{margin-right:18px}
header.nav{position:sticky;top:0;z-index:100;background:rgba(255,255,255,.96);backdrop-filter:blur(8px);border-bottom:1px solid var(--line);box-shadow:var(--shadow-sm)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:70px}
.brand{display:flex;align-items:center;gap:11px;font-weight:800;font-size:21px;color:var(--teal-900)}
.brand .mark{width:38px;height:38px;border-radius:10px;background:linear-gradient(135deg,var(--teal-600),var(--accent));display:grid;place-items:center;color:#fff;font-size:20px;font-weight:800}
.brand small{display:block;font-size:11px;font-weight:600;color:var(--ink-400);letter-spacing:.06em}
nav.menu ul{display:flex;list-style:none;gap:6px;align-items:center}
nav.menu a{display:inline-block;padding:9px 14px;border-radius:8px;color:var(--ink-700);font-weight:500;font-size:15px}
nav.menu a:hover,nav.menu a.active{background:var(--accent-soft);color:var(--teal-700)}
.nav-toggle{display:none;background:none;border:0;font-size:26px;color:var(--teal-900);cursor:pointer}

/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 28px;border-radius:10px;font-weight:600;font-size:16px;cursor:pointer;border:1px solid transparent;transition:all .2s;white-space:nowrap}
.btn-primary{background:linear-gradient(135deg,var(--teal-600),var(--accent));color:#fff;box-shadow:0 8px 20px rgba(14,138,125,.25)}
.btn-primary:hover{color:#fff;transform:translateY(-2px);box-shadow:0 12px 26px rgba(14,138,125,.32)}
.btn-ghost{background:transparent;color:var(--teal-700);border-color:var(--teal-600)}
.btn-ghost:hover{background:var(--accent-soft)}
.btn-light{background:#fff;color:var(--teal-700)}
.btn-lg{padding:15px 34px;font-size:17px}

/* ---------- Hero ---------- */
.hero{background:linear-gradient(135deg,#0b3b46 0%,#0e5c6b 55%,#137887 100%);color:#fff;padding:84px 0;position:relative;overflow:hidden}
.hero::after{content:"";position:absolute;right:-120px;top:-120px;width:420px;height:420px;border-radius:50%;background:radial-gradient(circle,rgba(26,154,168,.35),transparent 70%)}
.hero .container{position:relative;z-index:1;display:grid;grid-template-columns:1.15fr .85fr;gap:48px;align-items:center}
.hero h1{color:#fff;font-size:44px;line-height:1.22;margin-bottom:20px}
.hero h1 em{font-style:normal;color:#7fe0d2}
.hero p{color:#d3e8eb;font-size:19px;margin-bottom:30px;max-width:560px}
.hero-cta{display:flex;gap:16px;flex-wrap:wrap}
.hero-card{background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.2);border-radius:var(--radius);padding:30px;backdrop-filter:blur(6px)}
.hero-card h3{color:#fff;font-size:18px;margin-bottom:18px}
.hero-card .metric{display:flex;justify-content:space-between;padding:12px 0;border-bottom:1px dashed rgba(255,255,255,.22);font-size:15px}
.hero-card .metric:last-child{border-bottom:0}
.hero-card .metric b{color:#7fe0d2;font-size:20px}
.hero-page{padding:60px 0;background:linear-gradient(135deg,#0b3b46,#137887);color:#fff;text-align:center}
.hero-page h1{color:#fff;font-size:38px;margin-bottom:12px}
.hero-page p{color:#cfe4e8;font-size:18px;max-width:680px;margin:0 auto}
.breadcrumb{font-size:14px;color:var(--ink-400);margin-top:14px}
.breadcrumb a{color:#9fd4cf}

/* ---------- 通用网格/卡片 ---------- */
.grid{display:grid;gap:26px}
.grid-3{grid-template-columns:repeat(3,1fr)}
.grid-2{grid-template-columns:repeat(2,1fr)}
.grid-4{grid-template-columns:repeat(4,1fr)}
.card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:30px;box-shadow:var(--shadow-sm);transition:transform .25s,box-shadow .25s}
.card:hover{transform:translateY(-5px);box-shadow:var(--shadow)}
.card .ico{width:52px;height:52px;border-radius:12px;background:var(--accent-soft);color:var(--accent);display:grid;place-items:center;font-size:24px;margin-bottom:18px}
.card h3{font-size:20px;margin-bottom:10px}
.card p{color:var(--ink-500)}
.tag{display:inline-block;background:var(--accent-soft);color:var(--teal-700);font-size:13px;font-weight:600;padding:4px 12px;border-radius:999px;margin:0 6px 8px 0}

/* 版本卡 */
.version{position:relative;display:flex;flex-direction:column}
.version .vname{display:flex;align-items:center;justify-content:space-between;margin-bottom:6px}
.version .vname h3{font-size:23px}
.version .wait{font-size:14px;color:var(--gold);font-weight:700}
.version .rate{font-size:34px;color:var(--accent);font-weight:800;margin:8px 0 4px}
.version ul{list-style:none;margin:16px 0;flex:1}
.version li{padding:7px 0 7px 28px;position:relative;color:var(--ink-700);font-size:15px;border-bottom:1px dashed var(--line)}
.version li::before{content:"✓";position:absolute;left:0;color:var(--accent);font-weight:800}
.version.featured{border:2px solid var(--accent);box-shadow:var(--shadow)}
.version .ribbon{position:absolute;top:-13px;left:50%;transform:translateX(-50%);background:var(--accent);color:#fff;font-size:12px;font-weight:700;padding:4px 14px;border-radius:999px}

/* 数据条 */
.stats{background:linear-gradient(135deg,var(--teal-700),var(--teal-600));color:#fff;padding:56px 0}
.stats .grid-4{gap:20px}
.stat{text-align:center}
.stat b{display:block;font-size:44px;font-weight:800;color:#7fe0d2;line-height:1}
.stat span{display:block;margin-top:10px;color:#d3e8eb;font-size:15px}

/* 步骤 */
.steps{counter-reset:step}
.step{position:relative;padding-left:64px}
.step::before{counter-increment:step;content:counter(step);position:absolute;left:0;top:0;width:44px;height:44px;border-radius:50%;background:var(--accent-soft);color:var(--teal-700);font-weight:800;font-size:20px;display:grid;place-items:center}
.step h3{font-size:19px;margin-bottom:6px}
.step p{color:var(--ink-500);font-size:15px}

/* 内容排版 */
.prose{max-width:820px;margin:0 auto}
.prose h2{font-size:26px;margin:36px 0 14px}
.prose h3{font-size:20px;margin:26px 0 10px}
.prose p{margin-bottom:14px;color:var(--ink-700)}
.prose ul,.prose ol{margin:0 0 16px 22px;color:var(--ink-700)}
.prose li{margin-bottom:8px}
.prose .notice{background:var(--bg-soft);border-left:4px solid var(--accent);padding:16px 20px;border-radius:8px;margin:18px 0}

/* 表单 */
.form-card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:36px;box-shadow:var(--shadow)}
.form-row{margin-bottom:20px}
.form-row label{display:block;font-weight:600;margin-bottom:8px;font-size:15px}
.form-row label .req{color:#d35454}
.form-row input,.form-row select,.form-row textarea{width:100%;padding:12px 14px;border:1px solid var(--line);border-radius:9px;font-size:15px;font-family:inherit;color:var(--ink-900);background:#fdfefe}
.form-row input:focus,.form-row select:focus,.form-row textarea:focus{outline:none;border-color:var(--teal-500);box-shadow:0 0 0 3px rgba(26,154,168,.15)}
.checkline{display:flex;gap:10px;align-items:flex-start;font-size:14px;color:var(--ink-500)}
.checkline input{width:auto;margin-top:4px}
.form-msg{display:none;margin-top:16px;padding:14px 18px;border-radius:9px;background:var(--accent-soft);color:var(--teal-700);font-weight:600}

/* 联系信息 */
.info-list{list-style:none}
.info-list li{display:flex;gap:14px;padding:16px 0;border-bottom:1px solid var(--line)}
.info-list .ic{width:42px;height:42px;flex:0 0 42px;border-radius:10px;background:var(--accent-soft);color:var(--accent);display:grid;place-items:center;font-size:19px}
.info-list b{display:block;color:var(--teal-900)}
.info-list span{color:var(--ink-500);font-size:15px}

/* CTA */
.cta-band{background:linear-gradient(135deg,#0e5c6b,#0e8a7d);color:#fff;border-radius:var(--radius);padding:48px;text-align:center}
.cta-band h2{color:#fff;font-size:28px;margin-bottom:12px}
.cta-band p{color:#d3e8eb;margin-bottom:24px;font-size:17px}

/* ---------- 页脚 ---------- */
footer.site{background:var(--teal-900);color:#b9d2d7;padding:58px 0 0;font-size:14.5px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1.2fr;gap:36px;padding-bottom:40px}
footer.site h4{color:#fff;font-size:16px;margin-bottom:16px}
footer.site ul{list-style:none}
footer.site li{margin-bottom:10px}
footer.site a{color:#b9d2d7}
footer.site a:hover{color:#7fe0d2}
.footer-brand{font-weight:800;font-size:20px;color:#fff;margin-bottom:14px;display:flex;align-items:center;gap:10px}
.footer-brand .mark{width:34px;height:34px;border-radius:9px;background:linear-gradient(135deg,var(--teal-600),var(--accent));display:grid;place-items:center;color:#fff}
.footer-company{line-height:1.9;color:#9fc0c6}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding:20px 0;display:flex;justify-content:space-between;gap:14px;flex-wrap:wrap;color:#8fb0b6;font-size:13.5px}
.footer-bottom a{color:#9fc0c6}

/* 响应式 */
@media (max-width:960px){
  .hero .container{grid-template-columns:1fr}
  .grid-3,.grid-4{grid-template-columns:repeat(2,1fr)}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media (max-width:720px){
  .nav-toggle{display:block}
  nav.menu{position:absolute;top:70px;left:0;right:0;background:#fff;border-bottom:1px solid var(--line);display:none}
  nav.menu.open{display:block}
  nav.menu ul{flex-direction:column;align-items:stretch;padding:10px}
  .grid-2,.grid-3,.grid-4{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .hero h1{font-size:32px}
  .section{padding:54px 0}
  .section-head h2{font-size:26px}
  .topbar{display:none}
}