/* 骨痛王 · 中医骨病科普 —— 深古棕 + 墨绿 + 米白，适合中老年阅读 */
:root{
  --paper:#f6f1e7;      /* 米白底 */
  --paper-deep:#efe7d7;
  --ink:#2c2924;        /* 正文墨色 */
  --brown:#5b4636;      /* 深古棕 */
  --brown-dim:#7a6552;
  --green:#31513d;      /* 墨绿 */
  --green-deep:#22392c;
  --red:#a63d2f;        /* 朱砂红，点缀用 */
  --line:#e0d5c0;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  background:var(--paper);
  color:var(--ink);
  font-family:"Noto Serif SC","Source Han Serif SC","Songti SC","SimSun",serif;
  font-size:17.5px;
  line-height:1.95;
  -webkit-font-smoothing:antialiased;
}
.wrap{max-width:960px;margin:0 auto;padding:0 22px}
a{color:var(--green);text-decoration:none}
a:hover{text-decoration:underline}

/* ---------- 顶栏 ---------- */
.topbar{
  position:sticky;top:0;z-index:50;
  background:rgba(34,57,44,.96);
  backdrop-filter:blur(4px);
  border-bottom:3px solid var(--brown);
}
.bar-inner{display:flex;align-items:center;justify-content:space-between;min-height:60px;flex-wrap:wrap}
.logo{
  color:#f6f1e7;font-size:26px;letter-spacing:6px;font-weight:700;
  text-decoration:none!important;
}
.logo span{color:#d8b98a}
.menu-btn{display:none;background:none;border:1px solid rgba(246,241,231,.4);color:#f6f1e7;
  font-size:15px;padding:5px 12px;border-radius:4px;cursor:pointer}
.nav{display:flex;flex-wrap:wrap}
.nav a{
  color:rgba(246,241,231,.85);padding:6px 14px;font-size:16.5px;letter-spacing:1px;
  text-decoration:none!important;border-radius:4px;
}
.nav a:hover{background:rgba(246,241,231,.12);color:#fff}
.nav a.on{background:var(--brown);color:#f6f1e7}

/* ---------- 首页 hero ---------- */
.hero{
  background:linear-gradient(160deg,var(--green-deep) 0%,var(--green) 60%,#3a5c47 100%);
  color:#f6f1e7;padding:70px 0 60px;position:relative;
}
.hero::after{
  content:"";position:absolute;inset:auto 0 0 0;height:8px;
  background:linear-gradient(90deg,var(--brown) 0%,#d8b98a 50%,var(--brown) 100%);
}
.hero-quote{
  font-family:"KaiTi","STKaiti","Noto Serif SC",serif;
  font-size:23px;line-height:2.2;max-width:760px;margin:0 auto 18px;
  text-align:center;color:#f3ead8;
  text-shadow:0 1px 8px rgba(0,0,0,.35);
}
.hero-sign{
  text-align:center;color:rgba(246,241,231,.55);font-size:15px;margin-bottom:44px;
  font-family:"KaiTi","STKaiti",serif;
}
.hero-title{
  text-align:center;font-size:34px;letter-spacing:4px;margin-bottom:14px;font-weight:700;
}
.hero-title span{color:#d8b98a;margin:0 8px}
.hero-sub{
  text-align:center;color:rgba(246,241,231,.85);font-size:17px;max-width:640px;margin:0 auto 30px;
}
.hero-promises{text-align:center}
.hero-promises span{
  display:inline-block;margin:0 8px;padding:5px 18px;
  border:1px solid rgba(216,185,138,.55);border-radius:99px;
  color:#d8b98a;font-size:15.5px;letter-spacing:2px;
}

/* ---------- 首页各段 ---------- */
.hero-note{
  max-width:700px;margin:38px auto 0;padding:22px 28px;
  background:rgba(246,241,231,.08);border:1px solid rgba(216,185,138,.35);
  border-radius:10px;
}
.hero-note p{
  text-align:center;font-size:16.5px;line-height:2.05;color:#e9dfc8;margin-bottom:6px;
}
.hero-note p:last-child{margin-bottom:0}
.nutrition-feature{
  margin-top:42px;padding:30px 30px 26px;background:#fffdf7;
  border:2px solid #c44b3a;border-radius:14px;box-shadow:0 10px 28px rgba(166,61,47,.12);
}
.nutrition-intro h2{
  margin:4px 0 14px;color:#b52d24;font-size:29px;line-height:1.5;letter-spacing:2px;
}
.nutrition-kicker{
  color:#b52d24;font-weight:700;font-size:15px;letter-spacing:2px;
}
.nutrition-intro p{margin:0 0 14px;font-size:17px;line-height:2;text-align:justify}
.nutrition-custom-warning{margin:0 0 18px!important;padding:16px 18px;background:#fff0ed;border:2px solid #c42f24;border-radius:8px;color:#a3211a;font-weight:700!important;font-size:17px!important;line-height:1.9!important}
.nutrition-custom-warning strong{display:block;margin-bottom:4px;color:#981c16;font-size:20px}
.nutrition-intro .nutrition-highlight{
  padding:14px 18px;background:#fff0ed;border-left:6px solid #c42f24;
  color:#a3211a;font-weight:700;
}
.nutrition-facts{display:flex;flex-wrap:wrap;gap:10px 22px;margin:18px 0;color:#9e2b23;font-size:15px;font-weight:700}
.nutrition-action{
  display:inline-block;padding:8px 18px;background:#b52d24;color:#fff;border-radius:5px;
  font-size:16px;font-weight:700;text-decoration:none!important;
}
.nutrition-action:hover{background:#8f211c}
.nutrition-gallery{
  display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:26px;
}
.nutrition-gallery figure{margin:0;text-align:center}
.nutrition-gallery img{
  display:block;width:100%;aspect-ratio:1/1;object-fit:cover;border-radius:9px;
  border:1px solid #e7c7bf;box-shadow:0 5px 15px rgba(91,70,54,.12);
}
.nutrition-gallery figcaption{padding-top:5px;color:#8c4a41;font-size:14px}
.nutrition-disclaimer{margin:22px 0 0;color:#8f211c;font-size:14px;line-height:1.85;text-align:center}
.nutrition-perspective{margin-top:24px;padding:18px 20px;background:#fff7f3;border-top:1px solid #e7c7bf;border-bottom:1px solid #e7c7bf}
.nutrition-perspective h3{margin:0 0 10px;color:#8f211c;font-size:20px;letter-spacing:1px}
.nutrition-perspective p{margin:0 0 10px;font-size:15.5px;line-height:1.9;text-align:justify}
.nutrition-perspective p:last-child{margin-bottom:0}
.nutrition-perspective-note{color:#7f4b43;font-size:14px!important}
.why{padding:52px 0 10px}
.why-heart{
  margin:26px 0 6px;padding:24px 30px;
  background:linear-gradient(135deg,#f0e8d6,#ece2cc);
  border-left:5px solid var(--brown);border-radius:0 10px 10px 0;
}
.why-heart p{
  font-family:"KaiTi","STKaiti","Noto Serif SC",serif;
  font-size:19px;line-height:2.15;color:var(--brown);text-align:justify;
}
.why-grid{display:grid;grid-template-columns:1fr 1fr;gap:28px;font-size:17px}
.sec-title{
  font-size:24px;color:var(--brown);margin:34px 0 20px;letter-spacing:2px;
  padding-left:14px;border-left:5px solid var(--green);
}
.grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;padding-bottom:10px}
.card{
  display:block;background:#fffdf7;border:1px solid var(--line);border-radius:10px;
  padding:22px 20px 16px;transition:.18s;color:var(--ink);
}
.card:hover{transform:translateY(-3px);box-shadow:0 8px 22px rgba(91,70,54,.14);text-decoration:none}
.card h3{color:var(--green-deep);font-size:19px;margin-bottom:8px;letter-spacing:1px}
.card p{font-size:14.5px;color:var(--brown-dim);line-height:1.75;min-height:72px}
.card-go{color:var(--red);font-size:14px}
.latest{list-style:none;padding-bottom:8px}
.latest li{
  display:flex;justify-content:space-between;align-items:baseline;gap:16px;
  padding:11px 4px;border-bottom:1px dashed var(--line);
}
.latest li a{font-size:17px;color:var(--ink)}
.latest li a:hover{color:var(--red)}
.latest li span{color:var(--brown-dim);font-size:14px;white-space:nowrap}
.bottom-note{padding:26px 0 46px;color:var(--brown-dim);font-size:14px;text-align:center}
.main{padding-top:30px;min-height:62vh}

/* ---------- 首页诗句横幅 ---------- */
.poem-sec{padding-top:46px;padding-bottom:4px;text-align:center}
.poem-line{
  font-family:"KaiTi","STKaiti","Noto Serif SC",serif;
  font-size:24px;color:var(--green-deep);letter-spacing:3px;
}
.poem-src{font-size:14px;color:var(--brown-dim);margin-top:6px;font-family:"KaiTi","STKaiti",serif}
.poem-sub{
  max-width:640px;margin:16px auto 0;font-size:16.5px;color:var(--brown);line-height:2;
  padding:14px 22px;background:var(--paper-deep);border-radius:10px;
}
/* ---------- 首页骨小梁展示区 ---------- */
.bone-sec{
  display:grid;grid-template-columns:1fr 1.15fr;gap:34px;align-items:center;
  padding-top:44px;padding-bottom:14px;
}
.bone-img img{
  width:100%;border-radius:14px;border:1px solid var(--line);
  box-shadow:0 10px 30px rgba(91,70,54,.16);
}
.bone-text p{margin-bottom:14px;font-size:16.5px}
.bone-link{
  display:inline-block;margin-top:6px;color:var(--red);font-size:16px;font-weight:600;
}
/* ---------- 文章内配图 ---------- */
.imgbox{margin:10px 0 8px;text-align:center}
.imgbox img{
  max-width:82%;border-radius:12px;border:1px solid var(--line);
  box-shadow:0 8px 24px rgba(91,70,54,.14);
}
.imgcap{
  text-align:center;font-size:14px;color:var(--brown-dim);margin-bottom:22px;
}
/* ---------- 首页联系方式 ---------- */
.contact-sec{padding-top:34px;padding-bottom:10px}
.contact-box{
  text-align:center;padding:34px 26px;
  background:var(--green-deep);border-radius:14px;color:#f6f1e7;
}
.contact-box .c-title{font-size:19px;letter-spacing:2px;color:#d8b98a;margin-bottom:20px}
.c-contacts{display:flex;justify-content:center;gap:46px;flex-wrap:wrap;margin-bottom:16px}
.c-item{display:flex;flex-direction:column;gap:4px}
.c-label{font-size:14px;color:rgba(246,241,231,.65);letter-spacing:2px}
.qq-label{display:inline-flex;align-items:center;justify-content:center;gap:6px;letter-spacing:1px}
.qq-icon{font-family:"Segoe UI Emoji","Apple Color Emoji","Noto Color Emoji",sans-serif;font-size:22px;line-height:1}
.contact-box .c-num{
  font-size:30px;font-weight:700;letter-spacing:3px;color:#fff;
}
.contact-box .c-note{font-size:13.5px;color:rgba(246,241,231,.65)}

/* ---------- 栏目页头 ---------- */
.col-head h1{font-size:28px;color:var(--brown);letter-spacing:2px}
.col-sub{color:var(--green-deep);margin:8px 0 14px;font-size:16px}
.col-intro{
  background:var(--paper-deep);border-left:4px solid var(--brown);
  padding:14px 18px;border-radius:0 8px 8px 0;font-size:15.5px;color:var(--brown);
  margin-bottom:26px;line-height:1.9;
}

/* ---------- 文章页 ---------- */
.crumb{font-size:14px;color:var(--brown-dim);margin-bottom:18px}
.crumb a{color:var(--brown-dim)}
.article{background:#fffdf7;border:1px solid var(--line);border-radius:12px;padding:38px 42px 30px}
.article h1{font-size:27px;line-height:1.6;color:var(--brown);margin-bottom:10px}
.art-meta{color:var(--brown-dim);font-size:14px;padding-bottom:20px;border-bottom:1px solid var(--line);margin-bottom:24px}
.prose p{margin-bottom:18px;text-align:justify}
.prose h2{
  font-size:21px;color:var(--green-deep);margin:30px 0 14px;letter-spacing:1px;
  padding-bottom:6px;border-bottom:2px solid var(--paper-deep);
}
.prose ul,.prose ol{margin:0 0 18px 26px}
.prose li{margin-bottom:8px}
.prose strong{color:var(--brown)}
.prose table{width:100%;border-collapse:collapse;margin:6px 0 20px;font-size:15.5px}
.prose th{background:var(--green-deep);color:#f6f1e7;padding:10px 12px;font-weight:600}
.prose td{border:1px solid var(--line);padding:10px 12px;vertical-align:top;background:#fffef9}
.note{border-radius:8px;padding:16px 20px;margin:8px 0 22px;line-height:1.9}
.note.warn{background:#f7ece8;border-left:5px solid var(--red);color:#6e3026}
.note.safe{background:#ecf2ec;border-left:5px solid var(--green);color:var(--green-deep)}
.disclaim{
  margin-top:30px;padding:16px 20px;background:var(--paper-deep);
  border:1px dashed var(--brown-dim);border-radius:8px;font-size:14.5px;color:var(--brown);
}

/* ---------- 问答 ---------- */
.qa{
  background:#fffdf7;border:1px solid var(--line);border-radius:10px;
  margin-bottom:14px;overflow:hidden;
}
.qa summary{
  cursor:pointer;padding:18px 22px;font-size:17.5px;font-weight:600;color:var(--green-deep);
  list-style-position:inside;
}
.qa summary:hover{background:var(--paper-deep)}
.qa-a{padding:4px 22px 20px;color:var(--ink);font-size:16.5px;border-top:1px dashed var(--line)}
.promise{margin:0 0 18px 26px}
.promise li{margin-bottom:12px}

/* ---------- 页脚 ---------- */
footer{
  background:var(--green-deep);color:rgba(246,241,231,.8);
  padding:36px 0;margin-top:40px;border-top:6px solid var(--brown);
}
.foot-brand{font-size:18px;letter-spacing:3px;margin-bottom:12px;color:#d8b98a}
.foot-note{font-size:13.5px;line-height:1.9;max-width:760px}
.foot-note.dim{margin-top:8px;opacity:.6}

/* ---------- 响应式 ---------- */
@media (max-width:768px){
  body{font-size:17px}
  .menu-btn{display:block}
  .nav{display:none;width:100%;flex-direction:column;padding:10px 0}
  .nav.open{display:flex}
  .nav a{padding:11px 14px;border-bottom:1px solid rgba(246,241,231,.1)}
  .hero{padding:48px 0 40px}
  .hero-quote{font-size:19px;padding:0 6px}
  .hero-title{font-size:26px}
  .why-grid,.grid{grid-template-columns:1fr}
  .bone-sec{grid-template-columns:1fr}
  .nutrition-feature{padding:24px 18px 22px}
  .nutrition-intro h2{font-size:24px}
  .nutrition-gallery{grid-template-columns:repeat(2,1fr);gap:10px}
  .contact-box .c-num{font-size:26px}
  .hero-note{padding:18px 16px}
  .hero-note p{font-size:15.5px}
  .card p{min-height:0}
  .article{padding:26px 20px}
  .article h1{font-size:23px}
  .latest li{flex-direction:column;gap:2px}
  .prose table{font-size:14px;display:block;overflow-x:auto}
}