/* 控喘记 / Peakmate 官网样式（纯本地，无 CDN；品牌石板蓝 + 峰流速绿）*/
:root{
  --brand:#3a6e9e; --brand-deep:#21486c; --brand-soft:#e2edf6;
  --green:#33a854; --ink:#1c2530; --ink2:#5a6673; --bg:#f5f7fa; --card:#ffffff;
  --radius:18px; --maxw:1080px;
}
*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",Roboto,Helvetica,Arial,sans-serif;
  color:var(--ink);background:var(--bg);line-height:1.65;-webkit-font-smoothing:antialiased;
}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 22px}

/* 顶栏 */
header.nav{position:sticky;top:0;z-index:10;background:rgba(255,255,255,.86);backdrop-filter:saturate(180%) blur(12px);border-bottom:1px solid #e6eaf0}
.nav .wrap{display:flex;align-items:center;justify-content:space-between;height:62px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:19px;color:var(--brand-deep)}
.brand .logo{width:30px;height:30px;border-radius:8px;background:linear-gradient(135deg,#4a7db0,#1a385c);display:inline-block;position:relative;flex:0 0 auto}
.brand .logo::after{content:"";position:absolute;left:16%;bottom:26%;width:56%;height:34%;border:3px solid #fff;border-left:none;border-top:none;transform:rotate(-38deg);border-radius:2px}
.brand .dot{position:absolute;right:16%;top:20%;width:22%;height:22%;background:var(--green);border:2px solid #fff;border-radius:50%}
nav.links a{margin-left:22px;color:var(--ink2);font-weight:600;font-size:15px}
nav.links a:hover{color:var(--brand);text-decoration:none}

/* 英雄区 */
.hero{background:linear-gradient(135deg,#4a7db0,#1a385c);color:#fff;padding:78px 0 68px}
.hero h1{font-size:46px;font-weight:800;letter-spacing:-.5px;line-height:1.15}
.hero .tag{font-size:20px;opacity:.92;margin-top:14px;max-width:600px}
.hero .zone{display:inline-flex;gap:8px;margin-top:26px;flex-wrap:wrap}
.hero .zone span{background:rgba(255,255,255,.16);padding:7px 14px;border-radius:999px;font-size:14px;font-weight:600}
.btn{display:inline-block;background:#fff;color:var(--brand-deep);font-weight:700;padding:13px 24px;border-radius:14px;margin-top:30px}
.btn:hover{text-decoration:none;opacity:.92}
.hero .note{font-size:13px;opacity:.75;margin-top:12px}

/* 分区 */
section{padding:60px 0}
h2{font-size:30px;font-weight:800;color:var(--brand-deep);margin-bottom:8px}
.sub{color:var(--ink2);margin-bottom:34px;font-size:17px}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:20px}
.card{background:var(--card);border:1px solid #e8edf3;border-radius:var(--radius);padding:24px;box-shadow:0 10px 30px rgba(20,40,70,.05)}
.card .ic{width:42px;height:42px;border-radius:11px;background:var(--brand-soft);display:flex;align-items:center;justify-content:center;font-size:22px;margin-bottom:14px}
.card h3{font-size:18px;color:var(--ink);margin-bottom:6px}
.card p{color:var(--ink2);font-size:15px}
.alt{background:#eef2f7}

/* 文档型页面 */
.doc{padding:48px 0 70px}
.doc h1{font-size:34px;color:var(--brand-deep);margin-bottom:6px}
.doc .updated{color:var(--ink2);font-size:14px;margin-bottom:28px}
.doc h2{font-size:21px;margin:30px 0 8px}
.doc p,.doc li{color:#37414d;font-size:16px;margin-bottom:10px}
.doc ul{padding-left:22px}
.doc .box{background:var(--card);border:1px solid #e8edf3;border-radius:14px;padding:20px 24px;margin-top:18px}
.faq{background:var(--card);border:1px solid #e8edf3;border-radius:14px;padding:6px 24px;margin-top:16px}
.faq details{border-bottom:1px solid #eef2f7;padding:16px 0}
.faq details:last-child{border-bottom:none}
.faq summary{font-weight:700;cursor:pointer;font-size:16px;color:var(--ink)}
.faq p{margin-top:10px}

/* 联系 */
.contact{background:linear-gradient(135deg,#4a7db0,#1a385c);color:#fff;border-radius:var(--radius);padding:34px;text-align:center;margin-top:26px}
.contact a{color:#fff;font-weight:800;font-size:20px}

/* 页脚 */
footer{border-top:1px solid #e6eaf0;padding:30px 0;color:var(--ink2);font-size:14px}
footer .wrap{display:flex;flex-wrap:wrap;gap:12px;justify-content:space-between;align-items:center}
footer a{color:var(--ink2)}

/* 语言切换（EN / 简体中文） */
html.lang-en .zh{display:none}
html.lang-zh .en{display:none}
.langtog{margin-left:18px;display:inline-flex;border:1px solid #cfd8e3;border-radius:999px;overflow:hidden;flex:0 0 auto}
.langtog button{border:none;background:transparent;padding:5px 12px;font-size:13px;font-weight:700;color:var(--ink2);cursor:pointer;line-height:1.4}
.langtog button.on{background:var(--brand);color:#fff}

@media(max-width:640px){.hero h1{font-size:34px}.hero{padding:56px 0 48px}h2{font-size:25px}nav.links a{margin-left:14px;font-size:14px}.langtog{margin-left:10px}}