:root{
  --bg:#f4f7fb;
  --text:#183047;
  --muted:#5f7387;
  --line:#dde5ef;
  --primary:#0f294f;
  --primary-2:#153b69;
  --gold:#d7a940;
  --gold-2:#f3cd69;
  --card:#ffffff;
  --shadow:0 12px 40px rgba(13,32,56,.08);
  --radius:18px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Hiragino Sans GB","Microsoft YaHei",sans-serif;background:var(--bg);color:var(--text);line-height:1.72}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
.container{width:min(1180px,calc(100% - 32px));margin:0 auto}
.topbar{background:#091a33;color:#cfd9e5;font-size:13px}
.topbar-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:10px 0}
.topbar-links{display:flex;gap:14px;flex-wrap:wrap}
.topbar a{color:#d7e3f0}
.site-header{position:sticky;top:0;z-index:20;background:rgba(255,255,255,.92);backdrop-filter:saturate(140%) blur(12px);border-bottom:1px solid var(--line)}
.nav-wrap{display:flex;align-items:center;justify-content:space-between;gap:24px;padding:14px 0;position:relative}
.nav-brand-domain{display:none}
.logo-link img{width:190px;height:64px;object-fit:contain}
.main-nav{display:flex;gap:12px;flex-wrap:wrap}
.main-nav a{padding:10px 14px;border-radius:999px;color:#223a52;font-weight:600}
.main-nav a.active,.main-nav a:hover{background:#eaf1f8;color:var(--primary)}
.nav-toggle{display:none;border:1px solid var(--line);background:#fff;color:var(--primary);border-radius:12px;padding:10px;min-width:44px;min-height:44px;align-items:center;justify-content:center;gap:4px;box-shadow:var(--shadow)}
.nav-toggle span{display:block;width:18px;height:2px;background:currentColor;border-radius:2px}
.nav-overlay{position:fixed;inset:0;background:rgba(10,20,35,.38);backdrop-filter:blur(2px);opacity:0;pointer-events:none;transition:opacity .2s ease;z-index:25}
body.nav-open .nav-overlay{opacity:1;pointer-events:auto}
body.nav-open{overflow:hidden}
.hero{padding:40px 0 26px}
.hero-grid{display:grid;grid-template-columns:1.08fr .92fr;gap:28px;align-items:center}
.hero-copy .eyebrow{display:inline-flex;align-items:center;gap:10px;padding:8px 14px;background:#eaf1f8;border-radius:999px;color:var(--primary);font-weight:700;font-size:14px}
.hero h1{font-size:48px;line-height:1.15;margin:18px 0 16px}
.hero p{font-size:17px;color:var(--muted);max-width:700px}
.actions{display:flex;gap:14px;flex-wrap:wrap;margin:28px 0}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:14px 22px;border-radius:14px;font-weight:700}
.btn-primary{background:linear-gradient(135deg,var(--primary),var(--primary-2));color:#fff;box-shadow:var(--shadow)}
.btn-secondary{background:#fff;border:1px solid var(--line);color:var(--primary)}
.hero-card{background:#fff;border:1px solid var(--line);border-radius:24px;padding:18px;box-shadow:var(--shadow);overflow:hidden}
.hero-card img{border-radius:18px}
.hero-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:18px}
.stat{background:#fff;border:1px solid var(--line);border-radius:18px;padding:16px;box-shadow:var(--shadow)}
.stat strong{display:block;font-size:28px;color:var(--primary)}
.stat span{display:block;font-size:13px;color:var(--muted);margin-top:5px}
.section{padding:28px 0}
.section-header{display:flex;align-items:end;justify-content:space-between;gap:20px;margin-bottom:18px}
.section-header h2{font-size:30px;line-height:1.2;margin:0}
.section-header p{max-width:720px;color:var(--muted);margin:8px 0 0}
.grid-2,.grid-3,.grid-4{display:grid;gap:18px}
.grid-2{grid-template-columns:repeat(2,minmax(0,1fr))}
.grid-3{grid-template-columns:repeat(3,minmax(0,1fr))}
.grid-4{grid-template-columns:repeat(4,minmax(0,1fr))}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:22px;box-shadow:var(--shadow)}
.card h3{margin:4px 0 10px;font-size:22px;line-height:1.3}
.card p{margin:0;color:var(--muted)}
.card .tag{display:inline-block;padding:6px 10px;border-radius:999px;background:#eef4fa;color:var(--primary);font-weight:700;font-size:12px;margin-bottom:10px}
.card .meta{display:flex;gap:8px;flex-wrap:wrap;margin-top:14px}
.pill{display:inline-flex;padding:6px 10px;border-radius:999px;background:#fbf3df;color:#8b6220;font-size:12px;font-weight:700}
.list{display:grid;gap:14px}
.list-card{display:flex;gap:18px;align-items:flex-start;background:var(--card);border:1px solid var(--line);border-radius:18px;padding:16px 18px;box-shadow:var(--shadow)}
.list-card img.thumb{width:180px;border-radius:14px;aspect-ratio:16/9;object-fit:cover;flex:0 0 180px}
.list-card .index-badge{width:40px;height:40px;display:grid;place-items:center;border-radius:12px;background:#eef4fa;color:var(--primary);font-weight:800}
.banner{border-radius:24px;overflow:hidden;border:1px solid var(--line);box-shadow:var(--shadow);background:#fff}
.page-hero{padding:30px 0 18px}
.page-hero .banner img{width:100%;height:auto}
.breadcrumbs{font-size:14px;color:var(--muted);margin-bottom:14px}
.breadcrumbs a{color:#4d6987}
.page-title{padding:24px;background:#fff;border:1px solid var(--line);border-radius:22px;box-shadow:var(--shadow);margin-top:-30px;position:relative;z-index:1}
.page-title h1{margin:0 0 8px;font-size:38px;line-height:1.18}
.page-title p{margin:0;color:var(--muted)}
.content-wrap{display:grid;grid-template-columns:minmax(0,1fr) 320px;gap:22px;padding:20px 0 32px}
.prose{background:#fff;border:1px solid var(--line);border-radius:22px;padding:28px;box-shadow:var(--shadow)}
.prose h2{font-size:28px;line-height:1.25;margin:24px 0 10px}
.prose h3{font-size:22px;line-height:1.32;margin:18px 0 8px}
.prose p,.prose li{color:#29435a}
.prose ul{padding-left:20px}
.sidebar{display:grid;gap:18px;align-self:start;position:sticky;top:122px}
.side-card{background:#fff;border:1px solid var(--line);border-radius:18px;padding:18px;box-shadow:var(--shadow)}
.side-card h3{font-size:18px;margin:0 0 12px}
.side-card ul{padding-left:18px;margin:0}
.score-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:12px}
.score-item{padding:14px;border-radius:16px;background:#f7fafc;border:1px solid #e4ebf2}
.score-item strong{display:block;color:var(--primary);font-size:22px}
.table{width:100%;border-collapse:collapse;font-size:15px}
.table th,.table td{border-bottom:1px solid var(--line);padding:12px 8px;text-align:left;vertical-align:top}
.kicker{font-size:13px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;color:#8b6220}
.inline-links{display:flex;flex-wrap:wrap;gap:10px}
.inline-links a{padding:8px 12px;background:#eef4fa;border-radius:999px;color:var(--primary);font-weight:600;font-size:14px}
.site-footer{margin-top:30px;background:#0b1730;color:#cdd7e3}
.footer-grid{display:grid;grid-template-columns:1.1fr .9fr .9fr;gap:30px;padding:34px 0}
.footer-logo{width:180px;height:60px;object-fit:contain;margin-bottom:12px}
.footer-links{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.site-footer h4{margin:0 0 14px;color:#fff}
.site-footer a{color:#dce6f3}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08)}
.smallline{padding:12px 0;color:#a9bacd;font-size:13px}
.notice{padding:14px 16px;border-radius:16px;background:#f8fafc;border-left:4px solid var(--gold);color:#35506a}
.split-cards{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}
.kv{display:grid;grid-template-columns:160px 1fr;gap:10px;padding:10px 0;border-bottom:1px dashed var(--line)}
.kv:last-child{border-bottom:none}
.hero-mini{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.article-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}
.article-card img{aspect-ratio:16/9;object-fit:cover;border-radius:14px}
.article-card .date{font-size:13px;color:var(--muted);margin:10px 0 4px}
.highlight-panel{display:grid;grid-template-columns:1.1fr .9fr;gap:20px}
.quote-box{padding:18px;border-radius:18px;background:#f6f9fc;border:1px solid var(--line)}
@media (max-width: 1000px){
  .hero-grid,.content-wrap,.highlight-panel,.grid-4,.grid-3,.article-grid{grid-template-columns:1fr}
  .grid-2,.split-cards,.hero-mini,.hero-stats,.footer-grid{grid-template-columns:1fr}
  .sidebar{position:static}
  .page-title h1{font-size:32px}
  .hero h1{font-size:38px}
}
@media (max-width: 760px){
  body.nav-open .site-header{z-index:40}
  .nav-overlay{z-index:30;backdrop-filter:none;background:rgba(10,20,35,.28)}
  .topbar{display:none}
  .site-header{backdrop-filter:none}
  .container.nav-wrap{padding:10px 8px 10px 4px}
  .logo-link{position:relative;z-index:2;margin-left:-4px}
  .logo-link img{width:148px;height:50px}
  .nav-brand-domain{
    display:block;
    position:absolute;
    left:50%;
    top:50%;
    transform:translate(-50%,-50%);
    font-weight:700;
    font-size:clamp(13px,3.8vw,15px);
    color:var(--primary);
    letter-spacing:.02em;
    pointer-events:none;
    z-index:1;
    max-width:38vw;
    overflow:hidden;
    text-overflow:ellipsis;
    white-space:nowrap;
  }
  .nav-toggle{display:inline-flex;flex-direction:column;position:relative;z-index:2}
  .nav-toggle{transition:transform .2s ease, box-shadow .2s ease}
  .nav-toggle span{transition:transform .2s ease, opacity .2s ease}
  .nav-toggle[aria-expanded="true"]{box-shadow:0 0 0 3px rgba(29,78,216,.22)}
  .nav-toggle[aria-expanded="true"] span:nth-child(1){transform:translateY(6px) rotate(45deg)}
  .nav-toggle[aria-expanded="true"] span:nth-child(2){opacity:0}
  .nav-toggle[aria-expanded="true"] span:nth-child(3){transform:translateY(-6px) rotate(-45deg)}
  .main-nav{
    display:none;
    position:absolute;
    left:16px;
    right:16px;
    top:calc(100% + 8px);
    background:rgba(255,255,255,.98);
    border:1px solid rgba(15,41,79,.08);
    border-radius:14px;
    box-shadow:
      0 10px 24px rgba(15,41,79,.12),
      0 2px 6px rgba(15,41,79,.08);
    padding:10px;
    max-height:calc(100vh - 88px - env(safe-area-inset-bottom, 0px));
    overflow:auto;
    -webkit-overflow-scrolling:touch;
    padding-bottom:max(10px, env(safe-area-inset-bottom, 0px));
    gap:6px;
    z-index:50;
    transform:translateY(-6px) scale(.98);
    transform-origin:top right;
    opacity:0;
    transition:transform .2s ease, opacity .2s ease;
  }
  .main-nav.is-open{display:flex;flex-direction:column;transform:translateY(0) scale(1);opacity:1}
  .main-nav a{padding:11px 12px;font-size:14px;border-radius:10px}
  .main-nav a + a{margin-top:2px}
  .main-nav a.active{background:rgba(29,78,216,.12);color:#0f294f;font-weight:800}
  .hero{padding-top:26px}
  .hero h1{font-size:34px}
  .list-card{flex-direction:column}
  .list-card img.thumb{width:100%;flex-basis:auto}
}

/* v17 visual consistency pass */
.section{padding:34px 0}
.section + .section{padding-top:18px}
.page-hero{padding:34px 0 22px}
.page-title{padding:24px 26px;margin-top:-22px}
.page-hero .container:not(:has(.banner)) .page-title{margin-top:0}
.page-hero .container:not(:has(.banner)) .breadcrumbs{margin-bottom:16px}
.content-wrap{gap:24px;padding:24px 0 36px}
.prose{padding:32px}
.prose > :first-child{margin-top:0}
.prose > :last-child{margin-bottom:0}
.sidebar{gap:16px}
.side-card{padding:20px}
.card,.list-card,.score-item,.stat,.quote-box,.notice{transition:box-shadow .2s ease, transform .2s ease}
.grid-2,.grid-3,.grid-4,.article-grid,.split-cards{align-items:stretch}
.grid-2 > .card,
.grid-3 > .card,
.grid-4 > .card,
.article-grid > .card,
.article-grid > article,
.split-cards > .card{height:100%;display:flex;flex-direction:column;gap:0}
.grid-2 > .card,
.grid-3 > .card,
.grid-4 > .card{padding:24px}
.grid-2 > .card .tag,
.grid-3 > .card .tag,
.grid-4 > .card .tag{margin-bottom:12px}
.grid-2 > .card h3,
.grid-3 > .card h3,
.grid-4 > .card h3,
.article-grid .card h3,
.article-grid article h3{
  margin:2px 0 10px;
  font-size:21px;
  line-height:1.34;
  min-height:2.8em;
  display:-webkit-box;
  -webkit-line-clamp:2;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.grid-2 > .card p,
.grid-3 > .card p,
.grid-4 > .card p,
.article-grid .card p,
.article-grid article p{
  margin:0;
  color:var(--muted);
  line-height:1.72;
  min-height:6.9em;
  display:-webkit-box;
  -webkit-line-clamp:4;
  -webkit-box-orient:vertical;
  overflow:hidden;
}
.grid-2 > .card .meta,
.grid-3 > .card .meta,
.grid-4 > .card .meta{margin-top:14px;gap:8px 8px}
.grid-2 > .card .actions,
.grid-3 > .card .actions,
.grid-4 > .card .actions,
.article-grid .actions{margin-top:auto !important;padding-top:16px}
.btn{min-height:48px;padding:13px 20px;line-height:1.2;white-space:nowrap}
.grid-2 > .card .btn,
.grid-3 > .card .btn,
.grid-4 > .card .btn,
.article-grid .btn{min-width:132px;padding:12px 16px;font-size:15px}
.list-card{padding:18px 20px;border-radius:20px;gap:16px}
.list-card h3{font-size:22px;line-height:1.32;margin:2px 0 8px}
.list-card p{line-height:1.72}
.section-header{margin-bottom:14px}
.section-header h2{font-size:29px;line-height:1.22}
.section-header p{margin-top:10px;max-width:760px}
.kicker{font-size:12px;letter-spacing:.1em}
.inline-links{gap:12px}
.inline-links a{padding:9px 13px}
.notice{padding:16px 18px;border-radius:18px}
.hero{padding:44px 0 30px}
.hero-card{padding:20px}
.hero-stats{gap:16px}
.stat{padding:18px}
.footer-grid{gap:28px;padding:36px 0}
.smallline{padding:14px 0}
@media (max-width: 1000px){
  .page-title{padding:22px}
  .prose{padding:26px}
  .grid-2 > .card h3,
  .grid-3 > .card h3,
  .grid-4 > .card h3,
  .article-grid .card h3,
  .article-grid article h3{min-height:auto;-webkit-line-clamp:unset}
  .grid-2 > .card p,
  .grid-3 > .card p,
  .grid-4 > .card p,
  .article-grid .card p,
  .article-grid article p{min-height:auto;-webkit-line-clamp:unset}
}
@media (max-width: 760px){
  .section{padding:24px 0}
  .page-hero{padding:22px 0 12px}
  .page-title{padding:20px 18px;margin-top:-14px}
  .content-wrap{padding:18px 0 30px}
  .prose{padding:22px}
  .grid-2 > .card,
  .grid-3 > .card,
  .grid-4 > .card{padding:20px}
  .btn{width:100%}
  .grid-2 > .card .btn,
  .grid-3 > .card .btn,
  .grid-4 > .card .btn,
  .article-grid .btn{min-width:0}
}


/* v18 cover ratio unification */
:root{
  --cover-ratio-unified:16 / 9;
}
.hero-card img,
.page-hero .banner img{
  width:100%;
  aspect-ratio:var(--cover-ratio-unified);
  object-fit:cover;
  object-position:center center;
}
.hero-card{display:flex;flex-direction:column}
.page-hero .banner{background:linear-gradient(180deg,#f7fafd,#eef3f8)}
.page-hero .banner img{display:block}
@media (max-width: 760px){
  .hero-card img,
  .page-hero .banner img{aspect-ratio:16 / 10}
}


/* v19 cover framing consistency */
:root{
  --cover-shell-radius: 22px;
  --cover-inner-radius: 16px;
  --cover-shell-border: 1px;
  --cover-shell-shadow: 0 14px 34px rgba(13,32,56,.09);
}
.hero-card,
.banner{
  border-radius: var(--cover-shell-radius);
  border: var(--cover-shell-border) solid var(--line);
  box-shadow: var(--cover-shell-shadow);
  overflow: hidden;
  background: #fff;
}
.hero-card{
  padding: 16px;
}
.banner{
  padding: 14px;
}
.hero-card img,
.banner img,
.page-hero .banner img{
  border-radius: var(--cover-inner-radius);
  box-shadow: 0 10px 22px rgba(11,23,48,.08);
}
.page-hero .banner{
  background: linear-gradient(180deg,#f8fbff,#eef4fa);
}
@media (max-width: 1000px){
  .hero-card,
  .banner{padding:14px}
}
@media (max-width: 760px){
  :root{
    --cover-shell-radius: 20px;
    --cover-inner-radius: 14px;
  }
  .hero-card,
  .banner{padding:12px; box-shadow: 0 12px 28px rgba(13,32,56,.08)}
}


/* v33 fix banner and hero image cropping */
.hero-card img,
.page-hero .banner img{
  width:100%;
  height:auto !important;
  aspect-ratio:auto !important;
  object-fit:contain !important;
  object-position:center center;
}
.banner img{
  max-width:100%;
  height:auto;
}


/* v34 article and detail cover full-display safeguard */
.page-hero .banner img{
  max-width:100%;
  width:100%;
  height:auto !important;
  max-height:none !important;
  aspect-ratio:auto !important;
  object-fit:contain !important;
  object-position:center center !important;
}
.article-card img{
  width:100%;
  height:auto !important;
  aspect-ratio:auto !important;
  object-fit:contain !important;
  object-position:center center !important;
  border-radius:14px;
  background:linear-gradient(180deg,#f8fbff,#eef4fa);
  padding:8px;
  border:1px solid var(--line);
}
@media (max-width: 760px){
  .article-card img{padding:6px}
}


/* v62 platform faq */
.faq-list{display:grid;gap:14px;margin-top:14px}
.faq-item{border:1px solid var(--line);border-radius:16px;background:#f8fafc;overflow:hidden}
.faq-item summary{cursor:pointer;list-style:none;padding:16px 18px;font-weight:700;color:var(--primary)}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item .faq-answer{padding:0 18px 16px;color:#29435a}
.faq-item[open]{background:#fff}
.faq-item .faq-answer p{margin:0}


/* v63 platform topic-home upgrade */
.topic-hero-pills{display:flex;flex-wrap:wrap;gap:10px;margin-top:14px}
.topic-nav{display:flex;flex-wrap:wrap;gap:10px;margin:0 0 22px}
.topic-nav a{display:inline-flex;align-items:center;justify-content:center;padding:10px 14px;border-radius:999px;background:#eef4fa;border:1px solid var(--line);color:var(--primary);font-weight:700;font-size:14px}
.topic-card-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin:14px 0 6px}
.topic-mini-card{padding:16px 18px;border-radius:18px;background:#f8fbff;border:1px solid var(--line)}
.topic-mini-card strong{display:block;font-size:13px;color:var(--muted);margin-bottom:6px}
.topic-mini-card span{display:block;color:var(--primary);font-weight:700;line-height:1.5}
.topic-link-grid,.peer-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin:14px 0 8px}
.peer-grid{grid-template-columns:repeat(3,minmax(0,1fr))}
.topic-link-card,.peer-card{display:flex;flex-direction:column;gap:8px;padding:18px;border-radius:18px;background:#f8fbff;border:1px solid var(--line);box-shadow:var(--shadow)}
.topic-link-card h3,.peer-card h3{margin:0;font-size:18px;line-height:1.35}
.topic-link-card p,.peer-card p{margin:0;color:var(--muted);font-size:14px;line-height:1.7}
.topic-link-meta{margin-top:auto;padding-top:4px;font-size:13px;font-weight:700;color:var(--primary)}
.peer-tag{display:inline-flex;align-self:flex-start;padding:6px 10px;border-radius:999px;background:#eef4fa;color:var(--primary);font-size:12px;font-weight:700}
@media (max-width: 1000px){.peer-grid{grid-template-columns:1fr 1fr}}
@media (max-width: 760px){.topic-card-grid,.topic-link-grid,.peer-grid{grid-template-columns:1fr}.topic-nav a{width:calc(50% - 5px)}}

.section-muted{background:linear-gradient(180deg, rgba(16,24,40,.03), rgba(16,24,40,.01));border-top:1px solid rgba(15,23,42,.06);border-bottom:1px solid rgba(15,23,42,.06)}

/* v64 accessibility hardening (no copy change) */
a:focus-visible,
button:focus-visible,
summary:focus-visible,
[role="button"]:focus-visible{
  outline:3px solid #1d4ed8;
  outline-offset:2px;
  border-radius:8px;
}
.main-nav a:focus-visible,
.topbar a:focus-visible,
.footer-links a:focus-visible,
.btn:focus-visible{
  box-shadow:0 0 0 3px rgba(29,78,216,.22);
}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,
  *::before,
  *::after{
    animation-duration:.01ms !important;
    animation-iteration-count:1 !important;
    transition-duration:.01ms !important;
  }
}


/* v65 category hero copy upgrade */
.page-subtitle{font-size:17px;color:var(--muted)}
.hero-copy .hero-intro{margin-top:14px;font-size:16px;line-height:1.8;color:#29435a;max-width:760px}
.page-title .page-intro{margin-top:12px;color:#29435a;line-height:1.8}
.page-quicklinks{margin-top:18px}
.page-quicklinks a{font-weight:700}
@media (max-width:760px){
  .page-subtitle{font-size:16px}
  .hero-copy .hero-intro,.page-title .page-intro{font-size:15px}
}