/* ============================================================
   MMCX 微型推入式同轴专线 · 设计系统
   工程风 / 简约大气 / 去 AI 味；断点 1024 / 640
   ============================================================ */
:root{
  --ink:#0e1b2e;
  --ink-2:#27384d;
  --muted:#5e7187;
  --line:#dde5ee;
  --line-2:#eef2f7;
  --bg:#ffffff;
  --bg-2:#f5f8fb;
  --bg-3:#eef3f8;
  --primary:#1666c8;
  --primary-d:#0f4f9e;
  --cyan:#00a6c8;
  --gold:#b8902e;
  --ok:#1f8a4c;
  --maxw:1180px;
  --radius:12px;
  --shadow:0 1px 2px rgba(14,27,46,.04),0 8px 24px rgba(14,27,46,.06);
  --font:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;
  --mono:"SFMono-Regular",Consolas,"Liberation Mono",Menlo,monospace;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;font-family:var(--font);color:var(--ink);background:var(--bg);
  font-size:16px;line-height:1.75;-webkit-font-smoothing:antialiased;
}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
a{color:var(--primary);text-decoration:none}
a:hover{color:var(--primary-d);text-decoration:underline}
img{max-width:100%}
h1,h2,h3,h4{color:var(--ink);line-height:1.3;font-weight:700}
h1{font-size:32px;margin:.2em 0 .5em}
h2{font-size:24px;margin:1.6em 0 .6em}
h3{font-size:19px;margin:1.3em 0 .5em}
p{margin:.7em 0}
ul,ol{padding-left:1.4em;margin:.6em 0}
li{margin:.3em 0}
code,.tag-text,table.data td,table.data th{font-family:var(--mono)}
hr{border:none;border-top:1px solid var(--line);margin:2em 0}

/* ---------- 头部 ---------- */
.site-header{position:sticky;top:0;z-index:50;background:rgba(255,255,255,.92);
  backdrop-filter:saturate(180%) blur(8px);border-bottom:1px solid var(--line)}
.header-inner{display:flex;align-items:center;justify-content:space-between;height:62px}
.brand{display:flex;align-items:center;gap:10px}
.brand img{display:block}
.brand-text{display:flex;flex-direction:column;line-height:1.1}
.brand-name{font-weight:700;font-size:16px;color:var(--ink)}
.brand-domain{font-size:11px;color:var(--muted)}
.site-nav{display:flex;gap:26px}
.site-nav a{color:var(--ink-2);font-size:15px;font-weight:500}
.site-nav a:hover{color:var(--primary);text-decoration:none}
.nav-toggle{display:none;flex-direction:column;gap:4px;background:none;border:1px solid var(--line);
  border-radius:8px;padding:8px 10px;cursor:pointer}
.nav-toggle span{width:20px;height:2px;background:var(--ink);display:block}

/* ---------- 悬浮胶囊（居中右侧） ---------- */
.float-capsule{position:fixed;right:18px;top:50%;transform:translateY(-50%);
  display:flex;flex-direction:column;gap:10px;z-index:60}
.cap-btn{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:3px;
  width:58px;height:58px;border-radius:30px;border:1px solid var(--line);
  background:#fff;color:var(--primary);cursor:pointer;box-shadow:var(--shadow);
  font-size:11px;font-weight:600;transition:transform .15s,background .15s}
.cap-btn:hover{background:var(--primary);color:#fff;transform:translateY(-2px)}
.cap-btn svg{display:block}

/* ---------- 名片弹层 ---------- */
.wechat-modal-overlay{position:fixed;inset:0;background:rgba(14,27,46,.55);
  display:flex;align-items:center;justify-content:center;z-index:80;padding:20px}
.wechat-modal-overlay[hidden]{display:none}
.wechat-modal{background:#fff;border-radius:16px;width:100%;max-width:min(400px,92vw);
  max-height:90vh;overflow:auto;padding:24px 22px 20px;position:relative;
  box-shadow:0 20px 60px rgba(0,0,0,.25)}
.wechat-close{position:absolute;right:12px;top:10px;border:none;background:none;
  font-size:26px;line-height:1;color:var(--muted);cursor:pointer}
.wechat-title{margin:0 0 6px;font-size:19px;text-align:center}
.wechat-tip{font-size:13px;color:var(--muted);margin:0 auto 14px;text-align:center}
.wechat-qr{display:flex;justify-content:center;align-items:center;background:var(--bg-2);
  border:1px solid var(--line-2);border-radius:12px;padding:10px}
/* 名片按原图比例自适应：限最大宽与最大高，避免过大、裁切或压扁 */
.wechat-qr img{display:block;width:auto;height:auto;max-width:100%;max-height:58vh;border-radius:6px}
.wechat-note{font-size:12px;color:var(--muted);margin:14px 0 0;text-align:center}

/* ---------- 详情页标题与署名 ---------- */
.detail-title{font-size:30px;line-height:1.25;margin:.25em 0 .1em}
.byline{font-size:13px;color:var(--muted);margin:0 0 18px;font-family:var(--mono)}
.byline a{color:var(--primary);text-decoration:none}

/* ---------- 面包屑 ---------- */
.breadcrumb{font-size:13px;color:var(--muted);padding:18px 0 6px}
.breadcrumb a{color:var(--muted)}
.breadcrumb .sep{margin:0 7px;color:#c2cdda}
.breadcrumb a:last-child,.breadcrumb span:last-child{color:var(--ink-2)}

/* ---------- 详情页布局 ---------- */
.layout{display:grid;grid-template-columns:minmax(0,1fr) 240px;gap:40px;align-items:start;
  padding-bottom:60px}
.article-body{max-width:780px}
.toc-aside{position:sticky;top:84px;max-height:calc(100vh - 104px);overflow:auto}
.toc-card{border:1px solid var(--line);border-radius:12px;padding:14px 16px;background:var(--bg-2)}
.toc-title{font-size:13px;font-weight:700;color:var(--muted);margin:0 0 8px;text-transform:uppercase;letter-spacing:.04em}
.toc-card ul{list-style:none;margin:0;padding:0}
.toc-card li{margin:0;padding:3px 0;border-left:2px solid var(--line);padding-left:10px}
.toc-card li a{font-size:13.5px;color:var(--ink-2)}
.toc-card li a:hover{color:var(--primary);text-decoration:none}

/* 文章块级元素 */
.article-body blockquote{background:var(--bg-2);border-left:3px solid var(--primary);
  margin:1.2em 0;padding:14px 18px;border-radius:0 10px 10px 0;color:var(--ink-2)}
.article-body blockquote p{margin:.3em 0}
.keyword-line{font-size:14px;color:var(--muted);margin:.4em 0 1em}
.keyword-line strong{color:var(--primary)}
.article-body time{display:inline-block;font-size:13px;color:var(--muted);
  border:1px solid var(--line);border-radius:20px;padding:2px 12px;margin:.4em 0 1em}
.article-body table.data,.spec table.data{width:100%;border-collapse:collapse;margin:1.2em 0;
  font-size:14.5px;background:#fff}
table.data th,table.data td{border:1px solid var(--line);padding:9px 12px;text-align:left;vertical-align:top}
table.data thead th{background:var(--ink);color:#fff;font-weight:600;border-color:var(--ink)}
table.data tbody tr:nth-child(even){background:var(--bg-2)}
.conclusion{background:#eef6ff;border:1px solid #cfe3ff;border-radius:10px;padding:12px 18px;margin:1.2em 0}
.faq-item{border:1px solid var(--line);border-radius:10px;margin:.7em 0;background:#fff;overflow:hidden}
.faq-item summary{cursor:pointer;padding:12px 16px;font-weight:600;color:var(--ink);list-style:none}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item summary:before{content:"Q";display:inline-block;width:22px;height:22px;line-height:22px;
  text-align:center;background:var(--primary);color:#fff;border-radius:6px;font-size:12px;margin-right:10px}
.faq-item[open] summary{border-bottom:1px solid var(--line)}
.faq-item p{padding:4px 16px 14px;margin:0}

/* 相关阅读 / 相关产品 */
.article-body ul li a{font-weight:500}

/* ---------- 列表 / 分类页 ---------- */
.list-head{padding:10px 0 6px}
.list-head h1{font-size:30px;margin-bottom:.2em}
.list-head p{color:var(--muted)}
.list-page .layout{grid-template-columns:230px minmax(0,1fr)}
.cat-side{position:sticky;top:84px;align-self:start}
.cat-side-title{font-size:13px;font-weight:700;color:var(--muted);text-transform:uppercase;
  letter-spacing:.04em;margin:0 0 10px}
.category-list{list-style:none;margin:0;padding:0;border:1px solid var(--line);border-radius:12px;overflow:hidden}
.category-list li a{display:block;padding:11px 16px;color:var(--ink-2);border-bottom:1px solid var(--line-2);font-size:15px}
.category-list li:last-child a{border-bottom:none}
.category-list li a:hover{background:var(--bg-2);text-decoration:none;color:var(--primary)}
.category-list li a.active{background:var(--primary);color:#fff;font-weight:600}
.item-list{list-style:none;margin:0;padding:0}
.item-row{border-bottom:1px solid var(--line-2);padding:18px 0}
.item-row:last-child{border-bottom:none}
.item-link h3{margin:0 0 4px;font-size:18px}
.item-link:hover h3{color:var(--primary)}
.item-meta{font-size:13px;color:var(--gold);font-weight:600;margin:0 0 4px}
.item-sum{color:var(--ink-2);margin:0;font-size:14.5px}

/* ---------- 叶子页 ---------- */
.leaf-inner{max-width:820px;margin:0 auto;padding:10px 0 60px}
.leaf-inner h1{font-size:30px}
.notfound{text-align:center;padding:60px 0}
.nf-links{list-style:none;display:flex;gap:18px;justify-content:center;flex-wrap:wrap;padding:0}
.nf-links a{font-weight:600}

/* ---------- 首页 ---------- */
.hero{background:linear-gradient(180deg,#0e1b2e 0%,#13243d 60%,#0e1b2e 100%);color:#eaf1f8;padding:64px 0 56px}
.hero-inner{display:grid;grid-template-columns:1.25fr .9fr;gap:48px;align-items:center}
.hero .eyebrow{color:var(--cyan);font-size:13px;letter-spacing:.08em;text-transform:uppercase;margin:0 0 10px;font-weight:600}
.hero h1{color:#fff;font-size:44px;margin:.1em 0 .35em;letter-spacing:-.01em}
.hero-sub{color:#b9c8d8;font-size:17px;max-width:560px}
.hero-pitch{color:#e6eef7;font-size:15px;margin:.6em 0 1.2em}
.hero-pitch strong{color:var(--cyan)}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.btn-primary{display:inline-block;background:var(--primary);color:#fff;padding:12px 22px;border-radius:10px;
  font-weight:600;font-size:15px;border:1px solid var(--primary)}
.btn-primary:hover{background:var(--primary-d);color:#fff;text-decoration:none}
.btn-ghost{display:inline-block;background:transparent;color:#eaf1f8;padding:12px 22px;border-radius:10px;
  font-weight:600;font-size:15px;border:1px solid #3a536f}
.btn-ghost:hover{background:rgba(255,255,255,.08);color:#fff;text-decoration:none}
/* 浅色背景上的次级按钮（用于首页 apply-cta 等白底区块） */
.btn-outline{display:inline-block;background:#fff;color:var(--primary);padding:12px 22px;border-radius:10px;
  font-weight:600;font-size:15px;border:1px solid var(--primary);cursor:pointer}
.btn-outline:hover{background:var(--primary);color:#fff;text-decoration:none}
.hero-visual{background:rgba(255,255,255,.04);border:1px solid #28415c;border-radius:16px;padding:18px}
.freq-svg{width:100%;height:auto;display:block}
.hero-tags{list-style:none;display:flex;flex-wrap:wrap;gap:8px;padding:0;margin:14px 0 0}
.hero-tags li{font-size:12.5px;color:#cdd9e7;background:rgba(255,255,255,.06);
  border:1px solid #2c445e;border-radius:20px;padding:4px 12px;font-family:var(--mono)}

.band{padding:48px 0}
.band-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}
.band-item{background:var(--bg-2);border:1px solid var(--line);border-radius:14px;padding:20px 18px}
.band-item .bnum{display:inline-flex;width:26px;height:26px;align-items:center;justify-content:center;
  background:var(--primary);color:#fff;border-radius:7px;font-weight:700;font-size:13px;margin-bottom:10px}
.band-item h3{font-size:16px;margin:0 0 6px}
.band-item p{font-size:13.5px;color:var(--muted);margin:0}

.features{padding:40px 0;background:var(--bg-2)}
.sec-title{text-align:center;font-size:26px;margin:0 0 28px}
.feat-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.feat{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px 20px}
.feat h3{font-size:17px;margin:0 0 8px;color:var(--primary-d)}
.feat p{font-size:14px;color:var(--ink-2);margin:0}

.spec{padding:48px 0}
.spec table.data{font-size:14.5px}
.spec-note{font-size:13px;color:var(--muted);margin-top:10px}

.apply{padding:48px 0;background:var(--bg-2)}
.apply-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:18px}
.apply{background:#fff;border:1px solid var(--line);border-radius:14px;padding:22px 20px}
.apply h3{font-size:16px;margin:0 0 8px;color:var(--primary-d)}
.apply p{font-size:13.5px;color:var(--ink-2);margin:0}
.apply-cta{text-align:center;margin-top:30px;display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* ---------- 名片页 ---------- */
.card-page{padding:30px 0 60px}
.card-hero{display:grid;grid-template-columns:1.1fr .9fr;gap:48px;align-items:center;padding:30px 0}
.card-left .eyebrow{color:var(--primary);font-size:13px;letter-spacing:.08em;text-transform:uppercase;font-weight:600;margin:0 0 8px}
.card-left h1{font-size:34px;margin:0 0 .4em}
.lead{color:var(--ink-2);font-size:16px;max-width:520px}
.card-points{list-style:none;padding:0;margin:18px 0}
.card-points li{position:relative;padding-left:26px;margin:.6em 0;color:var(--ink-2);font-size:15px}
.card-points li:before{content:"";position:absolute;left:0;top:9px;width:10px;height:10px;border-radius:50%;
  background:var(--cyan);box-shadow:0 0 0 3px rgba(0,166,200,.18)}
.card-hint{font-size:13px;color:var(--muted);margin-top:10px}
.card-right{display:flex;justify-content:center}
.biz-card{width:340px;background:linear-gradient(160deg,#0e1b2e,#1a3050);color:#eaf1f8;border-radius:18px;
  padding:26px 24px;box-shadow:0 20px 50px rgba(14,27,46,.3);border:1px solid #2c445e}
.bc-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:18px}
.bc-logo{font-weight:800;font-size:22px;color:#fff;letter-spacing:.05em}
.bc-tag{font-size:12px;color:var(--cyan);border:1px solid #2c445e;border-radius:20px;padding:3px 10px}
.bc-name{font-size:20px;font-weight:700;color:#fff;margin-bottom:4px}
.bc-role{font-size:13px;color:#aebfd0;margin-bottom:18px}
.bc-line{display:flex;justify-content:space-between;gap:12px;padding:9px 0;border-top:1px solid #243a55;font-size:13.5px}
.bc-line span{color:#8ea3ba}
.bc-line b{color:#eaf1f8;font-weight:600;text-align:right}
.bc-foot{margin-top:18px;font-size:11.5px;color:#7e93ab}
.card-channels{padding:20px 0 40px}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--ink);color:#c4d2e0;margin-top:30px;padding:46px 0 26px}
.footer-inner{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:30px}
.footer-col h3{color:#fff;font-size:17px;margin:0 0 10px}
.footer-col h4{color:#fff;font-size:14px;margin:0 0 12px;text-transform:uppercase;letter-spacing:.04em}
.footer-col p{font-size:14px;color:#aebccd;line-height:1.7}
.footer-col ul{list-style:none;padding:0;margin:0}
.footer-col li{margin:.4em 0}
.footer-col a{color:#c4d2e0;font-size:14px}
.footer-col a:hover{color:#fff}
.filing{border-top:1px solid #243a55;margin-top:30px;padding-top:20px;display:flex;flex-wrap:wrap;
  gap:18px;align-items:center}
.filing-item{display:inline-flex;align-items:center;gap:7px;color:#aebccd;font-size:13px}
.filing-item:hover{color:#fff;text-decoration:none}
.filing-badge{flex:none}
.copyright{margin:0;font-size:12.5px;color:#7e93ab}

/* ---------- 响应式 ---------- */
@media (max-width:1024px){
  .layout{grid-template-columns:1fr;gap:24px}
  .toc-aside{position:static;max-height:none;order:-1}
  .toc-card{display:none}
  .list-page .layout{grid-template-columns:1fr}
  .cat-side{position:static}
  .hero-inner{grid-template-columns:1fr;gap:28px}
  .hero h1{font-size:36px}
  .card-hero{grid-template-columns:1fr;gap:28px}
  .band-grid{grid-template-columns:repeat(2,1fr)}
  .feat-grid{grid-template-columns:repeat(2,1fr)}
  .apply-grid{grid-template-columns:repeat(2,1fr)}
  .footer-inner{grid-template-columns:1fr 1fr}
}
@media (max-width:640px){
  .wrap{padding:0 16px}
  h1{font-size:26px;overflow-wrap:anywhere;word-break:break-word}
  h2{font-size:21px;overflow-wrap:anywhere}
  h3{font-size:17px}
  .article-body,.leaf-inner{max-width:100%}
  .site-nav{display:none;position:absolute;top:62px;left:0;right:0;flex-direction:column;
    background:#fff;border-bottom:1px solid var(--line);padding:10px 24px;gap:4px}
  .site-nav.open{display:flex}
  .nav-toggle{display:flex}
  .float-capsule{right:10px;gap:8px}
  .cap-btn{width:50px;height:50px;font-size:10px}
  .toc-card{display:none}
  .band-grid,.feat-grid,.apply-grid{grid-template-columns:1fr}
  .footer-inner{grid-template-columns:1fr}
  .hero h1{font-size:30px}
  .biz-card{width:100%}
}