/* ===== 读心伴 duxin.nuanxinban.cn 设计系统 ===== */
:root{
  --brand:#FF6B4A;          /* 暖珊瑚橙：关怀、温度 */
  --brand-dark:#E5532E;
  --brand-soft:#FFF1EA;
  --teal:#1FB6A6;           /* 青绿：安心、健康 */
  --teal-soft:#E6F7F4;
  --ink:#232A33;
  --muted:#6B7685;
  --line:#ECE3DC;
  --bg:#FFF8F3;
  --card:#FFFFFF;
  --radius:18px;
  --shadow:0 8px 30px rgba(229,83,46,.08);
  --shadow-lg:0 18px 50px rgba(229,83,46,.14);
  --maxw:1120px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif;
  background:var(--bg);color:var(--ink);line-height:1.7;-webkit-font-smoothing:antialiased;
}
a{color:inherit;text-decoration:none}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.btn{
  display:inline-flex;align-items:center;gap:8px;background:var(--brand);color:#fff;
  padding:13px 26px;border-radius:999px;font-weight:600;font-size:15px;
  box-shadow:0 6px 18px rgba(255,107,74,.32);transition:.2s;cursor:pointer;border:0;
}
.btn:hover{transform:translateY(-2px);box-shadow:0 10px 24px rgba(255,107,74,.42)}
.btn.ghost{background:#fff;color:var(--brand);box-shadow:inset 0 0 0 1.5px var(--brand)}
.btn.ghost:hover{background:var(--brand-soft)}
.btn.teal{background:var(--teal);box-shadow:0 6px 18px rgba(31,182,166,.3)}

/* ===== 导航 ===== */
.nav{position:sticky;top:0;z-index:50;background:rgba(255,248,243,.85);backdrop-filter:blur(10px);border-bottom:1px solid var(--line)}
.nav .wrap{display:flex;align-items:center;height:66px;justify-content:space-between}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px}
.logo .mark{width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,var(--brand),#FF9A6B);display:grid;place-items:center;color:#fff;font-size:18px;box-shadow:var(--shadow)}
.nav-links{display:flex;gap:30px;font-size:14.5px;color:var(--muted);font-weight:500}
.nav-links a:hover{color:var(--brand)}
.nav .btn{padding:9px 20px;font-size:14px}

/* ===== Hero ===== */
.hero{position:relative;overflow:hidden;padding:70px 0 60px}
.hero::before{content:"";position:absolute;top:-120px;right:-80px;width:420px;height:420px;border-radius:50%;background:radial-gradient(circle,rgba(255,107,74,.18),transparent 70%)}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:50px;align-items:center;position:relative}
.tag-pill{display:inline-flex;align-items:center;gap:8px;background:#fff;border:1px solid var(--line);color:var(--brand);font-size:13px;font-weight:600;padding:7px 14px;border-radius:999px;box-shadow:var(--shadow)}
.hero h1{font-size:46px;line-height:1.22;margin:18px 0 16px;letter-spacing:-.5px}
.hero h1 .hl{color:var(--brand);position:relative}
.hero p.lead{font-size:17px;color:var(--muted);max-width:520px;margin-bottom:28px}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.trust{display:flex;gap:22px;margin-top:30px;flex-wrap:wrap}
.trust div{display:flex;align-items:center;gap:8px;font-size:13.5px;color:var(--muted)}
.trust b{color:var(--ink)}
.dot{width:8px;height:8px;border-radius:50%;background:var(--teal)}

/* Hero 插画卡 */
.hero-card{background:var(--card);border-radius:24px;padding:26px;box-shadow:var(--shadow-lg);position:relative}
.hero-card .face{width:78px;height:78px;border-radius:50%;background:linear-gradient(135deg,#FFD9C7,#FFB59A);display:grid;place-items:center;font-size:38px;margin-bottom:14px}
.bubble{background:var(--brand-soft);border-radius:14px;padding:12px 16px;font-size:14.5px;margin:10px 0;position:relative;color:var(--ink)}
.bubble.me{background:#fff;border:1px solid var(--line)}
.need-chips{display:flex;flex-wrap:wrap;gap:8px;margin-top:14px}
.need-chips span{background:var(--teal-soft);color:var(--teal);font-size:12.5px;padding:5px 12px;border-radius:20px;font-weight:600}
.risk-badge{position:absolute;top:22px;right:22px;background:var(--brand);color:#fff;font-size:12px;font-weight:700;padding:6px 12px;border-radius:999px}

/* ===== 通用 section ===== */
section{padding:64px 0}
.sec-head{text-align:center;max-width:680px;margin:0 auto 44px}
.sec-head .kicker{color:var(--brand);font-weight:700;font-size:13px;letter-spacing:2px;text-transform:uppercase}
.sec-head h2{font-size:32px;margin:10px 0;letter-spacing:-.5px}
.sec-head p{color:var(--muted);font-size:16px}

/* 功能卡片 */
.feat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.feat{background:var(--card);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow);transition:.25s;border:1px solid transparent}
.feat:hover{transform:translateY(-4px);border-color:var(--brand-soft)}
.feat .ic{width:50px;height:50px;border-radius:14px;background:var(--brand-soft);display:grid;place-items:center;font-size:24px;margin-bottom:16px}
.feat h3{font-size:18px;margin-bottom:8px}
.feat p{color:var(--muted);font-size:14.5px}

/* 工作原理 */
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:24px;counter-reset:step}
.step{background:var(--card);border-radius:var(--radius);padding:30px 26px;box-shadow:var(--shadow);position:relative}
.step .num{width:46px;height:46px;border-radius:50%;background:linear-gradient(135deg,var(--brand),#FF9A6B);color:#fff;font-weight:800;display:grid;place-items:center;font-size:20px;margin-bottom:16px}
.step h3{font-size:18px;margin-bottom:8px}
.step p{color:var(--muted);font-size:14.5px}

/* ===== 体验区 ===== */
.demo{background:linear-gradient(180deg,#fff,var(--bg))}
.demo-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px}
.panel{background:var(--card);border-radius:var(--radius);padding:26px;box-shadow:var(--shadow)}
.panel h3{font-size:18px;margin-bottom:14px;display:flex;align-items:center;gap:8px}
textarea{width:100%;height:230px;border:1px solid var(--line);border-radius:14px;padding:14px;font-size:14px;resize:vertical;line-height:1.7;font-family:inherit;background:#FFFDFB}
textarea:focus{outline:none;border-color:var(--brand);box-shadow:0 0 0 3px var(--brand-soft)}
.hint{font-size:12.5px;color:var(--muted);margin:8px 0 14px}
.field{margin-bottom:14px}
.field label{display:block;font-size:13px;color:var(--muted);margin-bottom:6px;font-weight:600}
.field input{width:100%;padding:10px 14px;border:1px solid var(--line);border-radius:10px;font-size:14px;font-family:inherit}
.field input:focus{outline:none;border-color:var(--brand)}
.result-empty{color:var(--muted);font-size:14px;padding:30px 0;text-align:center}
.risk-tag{font-size:13px;font-weight:700;padding:4px 14px;border-radius:999px;background:var(--brand-soft);color:var(--brand)}
.risk-tag.high{background:#FDECEA;color:#E2483A}
.risk-tag.low{background:var(--teal-soft);color:var(--teal)}
.bars{margin:18px 0}
.bar-row{display:flex;align-items:center;gap:12px;margin:9px 0;font-size:14px}
.bar-row .bl{width:84px;color:var(--muted);flex-shrink:0}
.track{flex:1;height:11px;background:#F1EAE4;border-radius:6px;overflow:hidden}
.fill{height:100%;border-radius:6px;transition:width .6s ease}
.tagcloud{display:flex;flex-wrap:wrap;gap:8px;margin:6px 0 16px}
.tagcloud span{background:var(--teal-soft);color:var(--teal);font-size:13px;padding:5px 13px;border-radius:20px;font-weight:600}
.action{background:var(--brand-soft);border-radius:10px;padding:11px 14px;font-size:14px;margin:7px 0;color:var(--ink)}
.mood{font-size:30px;font-weight:800;margin-bottom:4px}

/* ===== 对比 ===== */
.compare{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.cmp{border-radius:var(--radius);padding:28px;box-shadow:var(--shadow)}
.cmp.us{background:var(--card);border:1.5px solid var(--brand-soft)}
.cmp.them{background:#F7F4F1}
.cmp h3{font-size:18px;margin-bottom:14px}
.cmp ul{list-style:none}
.cmp li{font-size:14.5px;padding:9px 0;border-bottom:1px dashed var(--line);color:var(--muted);display:flex;gap:10px}
.cmp li:last-child{border-bottom:0}
.cmp .ok{color:var(--teal);font-weight:700}
.cmp .no{color:#C9BDB3}

/* ===== CTA ===== */
.cta{background:linear-gradient(135deg,var(--brand),#FF8A5C);border-radius:28px;padding:54px 40px;text-align:center;color:#fff;box-shadow:var(--shadow-lg)}
.cta h2{font-size:30px;margin-bottom:12px}
.cta p{font-size:16px;opacity:.92;margin-bottom:26px}
.cta .btn{background:#fff;color:var(--brand)}

/* ===== 页脚 ===== */
footer{background:#2A2320;color:#C9BDB3;padding:44px 0 30px;margin-top:30px}
footer .wrap{display:flex;justify-content:space-between;flex-wrap:wrap;gap:24px}
footer .logo{color:#fff}
footer a{color:#C9BDB3;font-size:14px}
footer a:hover{color:#fff}
.f-col h4{color:#fff;font-size:15px;margin-bottom:12px}
.f-col a{display:block;margin:7px 0}
.f-bottom{border-top:1px solid #3A322E;margin-top:30px;padding-top:18px;font-size:13px;color:#9A8E84}

/* ===== 画像页 ===== */
.topbar{background:linear-gradient(135deg,var(--brand),#FF8A5C);color:#fff;padding:22px 0}
.topbar .wrap{display:flex;justify-content:space-between;align-items:center}
.topbar h1{font-size:22px;font-weight:800}
.topbar .sub{font-size:13px;opacity:.9}
.elder-pick{display:flex;align-items:center;gap:10px}
.elder-pick select{padding:8px 12px;border-radius:10px;border:0;font-size:14px;font-family:inherit}
.dash{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:26px}
.stat{background:var(--card);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow)}
.stat .k{font-size:13px;color:var(--muted)}
.stat .v{font-size:30px;font-weight:800;margin-top:4px}
.stat .v small{font-size:14px;color:var(--muted);font-weight:500}
.risk-line{display:inline-block;font-size:12px;font-weight:700;padding:3px 10px;border-radius:999px;margin-top:8px}
.risk-line.high{background:#FDECEA;color:#E2483A}
.risk-line.mid{background:#FFF4E0;color:#E08A1E}
.risk-line.low{background:var(--teal-soft);color:var(--teal)}
.card-grid{display:grid;grid-template-columns:1.2fr 1fr;gap:20px;margin-top:20px}
.box{background:var(--card);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}
.box h3{font-size:17px;margin-bottom:16px;display:flex;align-items:center;gap:8px}
.log{display:flex;gap:12px;padding:12px 0;border-bottom:1px dashed var(--line)}
.log:last-child{border-bottom:0}
.log .who{font-size:12px;font-weight:700;padding:3px 9px;border-radius:8px;height:fit-content}
.log .who.elder{background:var(--brand-soft);color:var(--brand)}
.log .who.care{background:var(--teal-soft);color:var(--teal)}
.log .txt{font-size:14px;color:var(--ink)}
.log .t{font-size:12px;color:var(--muted);margin-top:3px}
.alert-item{display:flex;gap:12px;align-items:flex-start;background:#FDECEA;border-radius:12px;padding:13px 15px;margin:10px 0}
.alert-item.mid{background:#FFF4E0}
.alert-item .lv{font-size:11px;font-weight:800;padding:3px 8px;border-radius:7px;background:#E2483A;color:#fff;height:fit-content}
.alert-item.mid .lv{background:#E08A1E}
.alert-item .msg{font-size:14px}
.alert-item .meta{font-size:12px;color:var(--muted);margin-top:3px}
.dash-tags{display:flex;flex-wrap:wrap;gap:8px}
.dash-tags span{background:var(--teal-soft);color:var(--teal);font-size:13px;padding:5px 12px;border-radius:20px;font-weight:600}
.note{font-size:13px;color:var(--muted);margin-top:14px}

/* ===== 响应式 ===== */
@media(max-width:900px){
  .hero-grid,.demo-grid,.compare,.card-grid{grid-template-columns:1fr}
  .feat-grid,.steps,.dash{grid-template-columns:1fr}
  .hero h1{font-size:34px}
  .nav-links{display:none}
  .sec-head h2{font-size:26px}
}