:root{
  --ink:#0E1A24;
  --ink-2:#14222E;
  --teal:#15B8A6;
  --teal-d:#0E8C7E;
  --amber:#E0A82E;
  --bg:#F7F9FB;
  --surface:#FFFFFF;
  --text:#1C2B36;
  --muted:#5C6B78;
  --line:#D8E0E6;
  --teal-soft:#E6F6F3;
  --radius:12px;
  --page-pad:16px;
  --header-h:64px;
  --h2-inset:0px;
}
*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;font-family:"PingFang SC","Microsoft YaHei","Segoe UI",Roboto,Helvetica,Arial,sans-serif;
  color:var(--text);background:var(--bg);line-height:1.75;font-size:16px;
}
a{color:var(--teal-d);text-decoration:none;}
a:hover{color:var(--teal);}
img{max-width:100%;height:auto;}
h1,h2,h3,h4,h5,h6{color:var(--ink);line-height:1.35;font-weight:700;}
h2{font-size:1.45rem;margin:1.8rem 0 .9rem;border-left:4px solid var(--teal);padding-left:12px;}
h3{font-size:1.15rem;margin:1.4rem 0 .7rem;}
p{margin:.7rem 0;}

/* ===== Header / Nav ===== */
.cox-header{position:fixed;top:0;left:0;right:0;height:var(--header-h);background:var(--ink);color:#fff;z-index:1000;box-shadow:0 2px 12px rgba(0,0,0,.18);}
.cox-header-inner{max-width:1200px;margin:0 auto;height:100%;display:flex;align-items:center;padding:0 var(--page-pad);gap:16px;}
.cox-logo{color:#fff;font-weight:800;font-size:1.15rem;letter-spacing:.5px;white-space:nowrap;}
.cox-logo-accent{color:var(--teal);}
.cox-nav-toggle{display:none;background:none;border:none;color:#fff;font-size:1.5rem;cursor:pointer;margin-left:auto;}
.cox-nav{display:flex;gap:18px;margin-left:auto;}
.cox-nav a{color:#cfe3e0;font-size:.95rem;padding:6px 4px;transition:color .2s;}
.cox-nav a:hover{color:var(--teal);}
body{padding-top:var(--header-h);}

/* ===== Layout container ===== */
.cox-container{max-width:1200px;margin:0 auto;padding:0 var(--page-pad);}

/* article / product detail */
.cox-article-layout{
  display:grid;
  grid-template-columns:minmax(0,1fr) 240px;
  grid-template-areas:"bread bread" "main toc";
  gap:0 28px;align-items:start;margin:24px auto 48px;
}
.cox-breadcrumb{grid-area:bread;}
.cox-content-main{grid-area:main;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:28px 30px;min-width:0;}
.cox-toc-aside{grid-area:toc;position:sticky;top:calc(var(--header-h) + 16px);max-height:calc(100vh - var(--header-h) - 32px);overflow-y:auto;}

/* list / category */
.cox-list-layout{
  display:grid;
  grid-template-columns:240px minmax(0,1fr);
  grid-template-areas:"side bread" "side main";
  gap:0 24px;align-items:start;margin:24px auto 48px;
}
.cox-cat-side{grid-area:side;}
.cox-list-layout > .cox-breadcrumb{grid-area:bread;}
.cox-cat-content{grid-area:main;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:24px 28px;min-width:0;}

/* simple page */
.cox-page-wrap{max-width:920px;margin:24px auto 48px;}
.cox-page-main{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:30px 34px;}

/* ===== Breadcrumb ===== */
.cox-breadcrumb{font-size:.85rem;color:var(--muted);padding:10px 2px;margin-bottom:6px;}
.cox-crumb-list{list-style:none;display:flex;flex-wrap:wrap;gap:6px;margin:0;padding:0;}
.cox-crumb-list li{display:flex;align-items:center;gap:6px;}
.cox-crumb-list li:not(:last-child)::after{content:"›";color:var(--line);}
.cox-crumb-list a{color:var(--muted);}
.cox-crumb-list a:hover{color:var(--teal);}
.cox-crumb-list span[aria-current]{color:var(--ink);font-weight:600;}

/* ===== TOC / category panels (native details) ===== */
.cox-toc-panel,.cox-cat-panel{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:14px 16px;margin-bottom:16px;}
.cox-toc-panel summary,.cox-cat-panel summary{cursor:pointer;font-weight:700;color:var(--ink);list-style:none;display:flex;align-items:center;justify-content:space-between;}
.cox-toc-panel summary::after,.cox-cat-panel summary::after{content:"▾";color:var(--teal);transition:transform .2s;}
.cox-toc-panel:not([open]) summary::after,.cox-cat-panel:not([open]) summary::after{transform:rotate(-90deg);}
.cox-toc-list,.cox-cat-list{list-style:none;margin:10px 0 0;padding:0;}
.cox-toc-list li{padding:3px 0;}
.cox-toc-lv3{padding-left:14px;font-size:.9rem;}
.cox-cat-list li{padding:6px 0;border-bottom:1px dashed var(--line);}
.cox-cat-list li:last-child{border-bottom:none;}
.cox-cat-list a{color:var(--text);}
.cox-cat-list a.active{color:var(--teal-d);font-weight:700;}

/* ===== Tables (covers cox-spec + all content tables) ===== */
.cox-content-main table,.cox-page-main table,table.cox-spec{
  width:100%;border-collapse:collapse;margin:1rem 0;font-size:.92rem;
  border:1px solid #cbd5e1;
}
.cox-content-main table th,.cox-page-main table th,table.cox-spec th{
  background:var(--ink);color:#fff;text-align:left;padding:9px 12px;border:1px solid #cbd5e1;
}
.cox-content-main table td,.cox-page-main table td,table.cox-spec td{
  padding:8px 12px;border:1px solid #cbd5e1;
}
.cox-content-main table tbody tr:nth-child(even),.cox-page-main table tbody tr:nth-child(even),table.cox-spec tbody tr:nth-child(even){
  background:var(--teal-soft);
}

/* ===== FAQ ===== */
.cox-faq{margin-top:2rem;border-top:2px solid var(--teal);padding-top:1rem;}
.cox-faq-title{font-size:1.25rem;}
.cox-faq-item{border:1px solid var(--line);border-radius:10px;margin:.6rem 0;background:#fff;overflow:hidden;}
.cox-faq-item summary{cursor:pointer;padding:12px 16px;font-weight:600;color:var(--ink);}
.cox-faq-item[open] summary{background:var(--teal-soft);}
.cox-faq-a{padding:0 16px 14px;color:var(--text);}

/* ===== Tags ===== */
.cox-tag-row{margin:.6rem 0 1.2rem;}
.tag-text{display:inline-block;background:var(--teal-soft);color:var(--teal-d);border-radius:20px;padding:3px 12px;font-size:.82rem;margin:3px 6px 3px 0;}

/* ===== Entry list (list pages) ===== */
.cox-list-title{font-size:1.6rem;margin-top:0;}
.cox-list-intro{color:var(--muted);margin-bottom:1.2rem;}
.cox-entry-list{list-style:none;margin:0;padding:0;}
.cox-entry-item{border:1px solid var(--line);border-radius:10px;margin:.7rem 0;transition:box-shadow .2s,transform .2s;background:#fff;}
.cox-entry-item:hover{box-shadow:0 6px 18px rgba(14,26,36,.08);transform:translateY(-2px);}
.cox-entry-link{display:block;padding:16px 18px;}
.cox-entry-title{display:block;font-weight:700;color:var(--ink);font-size:1.05rem;}
.cox-entry-meta{display:block;color:var(--teal-d);font-size:.82rem;margin:4px 0;}
.cox-entry-desc{display:block;color:var(--muted);font-size:.9rem;}

/* ===== Home ===== */
.cox-hero{background:linear-gradient(135deg,var(--ink) 0%,var(--ink-2) 60%,#0b2a2c 100%);color:#fff;padding:72px 0 64px;}
.cox-hero-title{font-size:2.1rem;margin:0 0 16px;max-width:820px;}
.cox-hero-sub{font-size:1.05rem;color:#cfe3e0;max-width:760px;margin:0 0 26px;line-height:1.8;}
.cox-hero-actions{display:flex;gap:14px;flex-wrap:wrap;}
.cox-btn{display:inline-block;padding:11px 26px;border-radius:30px;font-weight:700;font-size:.95rem;transition:all .2s;}
.cox-btn-primary{background:var(--teal);color:#04201d;}
.cox-btn-primary:hover{background:var(--teal-d);color:#fff;}
.cox-btn-ghost{border:1px solid var(--teal);color:var(--teal);}
.cox-btn-ghost:hover{background:var(--teal);color:#04201d;}
.cox-home-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px;margin:40px auto;}
.cox-home-block{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px 26px;}
.cox-home-h2{font-size:1.25rem;margin-top:0;color:var(--ink);}
.cox-home-cats{list-style:none;margin:0;padding:0;}
.cox-home-cats li{display:flex;justify-content:space-between;padding:9px 0;border-bottom:1px dashed var(--line);}
.cox-home-cats li:last-child{border-bottom:none;}
.cox-home-cats a{font-weight:600;}
.cox-home-cat-count{color:var(--muted);font-size:.85rem;}
.cox-home-feature{margin:0 auto 40px;}

/* ===== Archive ===== */
.cox-page-h1{font-size:1.8rem;}
.cox-archive-h2{font-size:1.3rem;margin-top:1.8rem;border-left:4px solid var(--teal);padding-left:10px;}
.cox-archive-h3{font-size:1.05rem;color:var(--teal-d);margin-top:1rem;}
.cox-archive-list{list-style:none;padding:0;margin:0;display:grid;grid-template-columns:1fr 1fr;gap:6px 20px;}
.cox-archive-list li{padding:5px 0;}

/* ===== Not found ===== */
.cox-notfound{text-align:center;padding:90px 16px;}
.cox-notfound-code{font-size:5rem;color:var(--teal);margin:0;}
.cox-notfound-text{color:var(--muted);margin-bottom:24px;}

/* ===== Floating capsule ===== */
.cox-float{position:fixed;right:18px;top:50%;transform:translateY(-50%);display:flex;flex-direction:column;gap:12px;z-index:900;}
.cox-float-btn{width:54px;height:54px;border:none;border-radius:30px;cursor:pointer;display:flex;flex-direction:column;align-items:center;justify-content:center;color:#fff;box-shadow:0 6px 18px rgba(14,26,36,.25);transition:transform .2s;}
.cox-float-btn:hover{transform:scale(1.06);}
.cox-float-ico{font-size:1.2rem;line-height:1;}
.cox-float-txt{font-size:.7rem;margin-top:2px;}
.cox-float-card{background:linear-gradient(135deg,#15B8A6,#0E8C7E);}
.cox-float-mail{background:linear-gradient(135deg,#E0A82E,#c98a14);}
.cox-float-top{background:linear-gradient(135deg,#2b3b48,#0E1A24);}

/* ===== Card modal ===== */
.cox-card-modal[hidden]{display:none;}
.cox-card-modal{position:fixed;inset:0;z-index:2000;display:flex;align-items:center;justify-content:center;}
.cox-card-backdrop{position:absolute;inset:0;background:rgba(14,26,36,.6);}
.cox-card-frame{position:relative;z-index:1;}
.cox-card-img{display:block;width:300px;height:500px;object-fit:contain;background:#fff;border-radius:8px;box-shadow:0 10px 40px rgba(0,0,0,.4);}
.cox-card-close{position:absolute;top:-12px;right:-12px;width:34px;height:34px;border-radius:50%;border:none;background:var(--ink);color:#fff;font-size:1.3rem;cursor:pointer;}

/* ===== Footer ===== */
.cox-footer{background:var(--ink);color:#cfe3e0;margin-top:40px;padding:40px 0 0;}
.cox-footer-inner{max-width:1200px;margin:0 auto;padding:0 var(--page-pad);display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:30px;}
.cox-footer-col h3{color:#fff;font-size:1.05rem;margin-top:0;}
.cox-footer-col a{color:var(--teal);display:block;margin:4px 0;}
.cox-footer-bar{border-top:1px solid rgba(255,255,255,.12);margin-top:30px;padding:16px var(--page-pad);text-align:center;color:#9fb3b0;font-size:.85rem;}

/* ===== Responsive ===== */
@media (max-width:1024px){
  .cox-nav{display:none;position:absolute;top:var(--header-h);left:0;right:0;background:var(--ink);flex-direction:column;gap:0;padding:8px var(--page-pad);}
  .cox-nav.cox-open{display:flex;}
  .cox-nav a{padding:12px 0;border-bottom:1px solid rgba(255,255,255,.08);}
  .cox-nav-toggle{display:block;}
  .cox-article-layout{grid-template-columns:1fr;grid-template-areas:"bread" "main" "toc";}
  .cox-list-layout{grid-template-columns:1fr;grid-template-areas:"bread" "side" "main";}
  .cox-toc-aside{position:static;max-height:none;}
  .cox-home-grid{grid-template-columns:1fr;}
  .cox-footer-inner{grid-template-columns:1fr;}
  .cox-archive-list{grid-template-columns:1fr;}
  .cox-content-main{padding:20px 18px;}
  .cox-cat-content{padding:18px 16px;}
}
@media (max-width:560px){
  .cox-hero-title{font-size:1.5rem;}
  .cox-float{right:10px;gap:8px;}
  .cox-float-btn{width:46px;height:46px;}
}

/* ===== Home landing (v2) ===== */
.cox-breadcrumb-wrap{max-width:1200px;margin:0 auto;padding:6px var(--page-pad) 0;}
.cox-hero-title{color:#fff;}
.cox-hero-eyebrow{color:var(--teal);font-size:.9rem;letter-spacing:.5px;margin:0 0 14px;font-weight:600;}
.cox-hero-accent{display:block;color:var(--teal);font-size:.62em;margin-top:10px;font-weight:700;letter-spacing:1px;}
.cox-hero-stats{list-style:none;display:flex;flex-wrap:wrap;gap:14px 40px;margin:34px 0 0;padding:26px 0 0;border-top:1px solid rgba(255,255,255,.14);}
.cox-hero-stats li{display:flex;flex-direction:column;}
.cox-hero-stats b{font-size:1.5rem;color:#fff;line-height:1.15;}
.cox-hero-stats span{font-size:.82rem;color:#9fb3b0;margin-top:4px;}

.cox-section{margin:56px auto;}
.cox-section-h2{font-size:1.6rem;margin:0 0 12px;border-left:4px solid var(--teal);padding-left:12px;color:var(--ink);}
.cox-section-sub{color:var(--muted);max-width:820px;margin:0 0 28px;line-height:1.8;}
.cox-link-more{display:inline-block;margin-top:10px;font-weight:700;color:var(--teal-d);}
.cox-link-more:hover{color:var(--teal);}

.cox-intro{display:grid;grid-template-columns:minmax(0,1.6fr) minmax(0,1fr);gap:36px;align-items:center;}
.cox-intro-text p{color:var(--text);}
.cox-intro-cards{list-style:none;display:grid;grid-template-columns:1fr 1fr;gap:14px;margin:0;padding:0;}
.cox-intro-cards li{background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:18px 16px;text-align:center;}
.cox-intro-cards b{display:block;font-size:1.25rem;color:var(--teal-d);}
.cox-intro-cards span{display:block;font-size:.82rem;color:var(--muted);margin-top:6px;}

.cox-dir-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.cox-dir-card{display:block;position:relative;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px 22px 18px;transition:box-shadow .2s,transform .2s,border-color .2s;}
.cox-dir-card:hover{box-shadow:0 10px 28px rgba(14,26,36,.10);transform:translateY(-3px);border-color:var(--teal);}
.cox-dir-count{position:absolute;top:16px;right:16px;background:var(--teal-soft);color:var(--teal-d);border-radius:20px;padding:2px 10px;font-size:.75rem;font-weight:700;}
.cox-dir-card h3{font-size:1.15rem;margin:0 0 8px;padding-right:52px;color:var(--ink);}
.cox-dir-card p{color:var(--muted);font-size:.92rem;margin:0 0 12px;line-height:1.7;}
.cox-dir-more{color:var(--teal-d);font-size:.85rem;font-weight:700;}

.cox-advantage-band{background:linear-gradient(135deg,var(--ink) 0%,var(--ink-2) 60%,#0b2a2c 100%);color:#fff;padding:58px 0;margin:56px 0;}
.cox-advantage-band .cox-section-h2{color:#fff;}
.cox-advantage-band .cox-section-sub{color:#cfe3e0;}
.cox-adv-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:22px;margin-top:8px;}
.cox-adv{background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.10);border-radius:var(--radius);padding:22px 20px;}
.cox-adv-ico{display:inline-block;font-size:.9rem;font-weight:800;color:var(--teal);border:1px solid rgba(21,184,166,.5);border-radius:8px;padding:3px 9px;margin-bottom:12px;}
.cox-adv h3{color:#fff;font-size:1.08rem;margin:0 0 8px;}
.cox-adv p{color:#c6d8d5;font-size:.9rem;margin:0;line-height:1.7;}

.cox-scene-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.cox-scene{background:var(--surface);border:1px solid var(--line);border-top:3px solid var(--teal);border-radius:var(--radius);padding:20px;}
.cox-scene h3{font-size:1.05rem;margin:0 0 8px;color:var(--ink);}
.cox-scene p{color:var(--muted);font-size:.9rem;margin:0;line-height:1.7;}

.cox-steps{list-style:none;counter-reset:step;margin:0;padding:0;display:grid;grid-template-columns:repeat(3,1fr);gap:20px;}
.cox-steps li{counter-increment:step;background:var(--surface);border:1px solid var(--line);border-radius:var(--radius);padding:22px 20px;position:relative;}
.cox-steps li::before{content:"0" counter(step);display:block;font-size:1.5rem;font-weight:800;color:var(--teal);margin-bottom:8px;}
.cox-steps b{display:block;font-size:1.05rem;color:var(--ink);margin-bottom:6px;}
.cox-steps span{display:block;color:var(--muted);font-size:.9rem;line-height:1.7;}

.cox-reading .cox-entry-list{margin-top:6px;}

.cox-cta-band{background:linear-gradient(135deg,#0E8C7E 0%,#15B8A6 100%);color:#fff;padding:52px 0;margin-top:56px;}
.cox-cta-band h2{color:#fff;font-size:1.6rem;margin:0 0 10px;border:none;padding-left:0;}
.cox-cta-band p{color:#eafffb;margin:0 0 22px;max-width:640px;}
.cox-cta-band .cox-btn-primary{background:#04201d;color:#fff;}
.cox-cta-band .cox-btn-primary:hover{background:#031512;}
.cox-cta-band .cox-btn-ghost{border-color:#fff;color:#fff;}
.cox-cta-band .cox-btn-ghost:hover{background:#fff;color:var(--teal-d);}

@media (max-width:1024px){
  .cox-intro{grid-template-columns:1fr;gap:26px;}
  .cox-dir-grid,.cox-adv-grid,.cox-scene-grid,.cox-steps{grid-template-columns:1fr 1fr;}
}
@media (max-width:560px){
  .cox-dir-grid,.cox-adv-grid,.cox-scene-grid,.cox-steps,.cox-intro-cards{grid-template-columns:1fr;}
  .cox-hero-stats{gap:12px 24px;}
  .cox-hero-stats b{font-size:1.2rem;}
  .cox-section{margin:40px auto;}
}