/* === kaygb.com — Core Stylesheet === */
/* Design: security advisory + alert red, VARIANCE 5 / MOTION 4 / DENSITY 3 */

/* === RESET & BASE === */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",sans-serif;
  font-size:16px;line-height:1.7;color:#d5d8dd;
  background:#0c0e12;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}

/* === CSS VARIABLES === */
:root{
  --theme-bg:#0c0e12;
  --theme-bg2:#12151b;
  --theme-bg3:#171b22;
  --theme-bg-card:rgba(255,255,255,0.025);
  --theme-border:rgba(255,255,255,0.06);
  --theme-border-strong:rgba(255,255,255,0.1);
  --theme-accent:#ef4444;
  --theme-accent-glow:rgba(239,68,68,0.15);
  --theme-accent-dim:rgba(239,68,68,0.08);
  --theme-text:#d5d8dd;
  --theme-text-dim:#8f96a3;
  --theme-text-muted:#5f6672;
  --theme-radius:12px;
  --theme-radius-sm:8px;
  --theme-max-w:1100px;
  --theme-header-h:64px;
}

/* === TYPOGRAPHY === */
h1,h2,h3,h4{color:#e8eaee;font-family:'PingFang SC','Microsoft YaHei','Helvetica Neue',sans-serif;line-height:1.22;font-weight:700}
h1{font-size:clamp(2rem,4.5vw,3.25rem);letter-spacing:-0.03em}
h2{font-size:clamp(1.5rem,3vw,2.25rem);letter-spacing:-0.02em}
h3{font-size:1.125rem;letter-spacing:-0.01em}
p{margin-bottom:1rem}
a{color:var(--theme-accent);text-decoration:none;transition:color .2s}
a:hover{color:#f87171}

/* === CONTAINER === */
.wrapper{max-width:var(--theme-max-w);margin:0 auto;padding:0 24px}

/* === NAVIGATION === */
.topbar{
  position:sticky;top:0;z-index:100;
  background:rgba(12,14,18,0.94);backdrop-filter:blur(16px);
  border-bottom:1px solid var(--theme-border);height:var(--theme-header-h);
}
.topbar .wrapper{
  display:flex;align-items:center;justify-content:space-between;
  height:100%;
}
.brand{
  font-size:1.25rem;font-weight:800;letter-spacing:-0.02em;
  color:#f0f0f0;white-space:nowrap;
}
.brand span{color:var(--theme-accent)}
.menu{display:flex;align-items:center;gap:32px;list-style:none}
.menu a{
  color:var(--theme-text-dim);font-size:0.9rem;font-weight:500;
  transition:color .2s;white-space:nowrap;
}
.menu a:hover,.menu a.a{color:#f0f0f0}
.menu-btn{
  display:inline-flex;align-items:center;gap:6px;
  background:var(--theme-accent);color:#0c0e12!important;
  padding:8px 18px;border-radius:999px;
  font-weight:700;font-size:0.85rem;
  transition:transform .15s,box-shadow .15s;
}
.menu-btn:hover{transform:translateY(-1px);box-shadow:0 4px 20px var(--theme-accent-glow)}

/* Mobile nav toggle */
.nt{display:none;background:none;border:none;color:#f0f0f0;font-size:1.5rem;cursor:pointer;padding:8px}

/* === HERO === */
.masthead{
  padding:80px 0 80px;
  background:radial-gradient(ellipse 70% 60% at 50% 0%,rgba(239,68,68,0.05),transparent 60%);
}
.masthead .wrapper{
  display:grid;grid-template-columns:1fr 1fr;gap:60px;align-items:center;
}
.he{
  font-size:0.75rem;text-transform:uppercase;letter-spacing:0.2em;
  color:var(--theme-accent);margin-bottom:16px;font-weight:600;
}
.masthead-title{font-size:clamp(2.25rem,5.5vw,3.75rem);margin-bottom:20px}
.masthead-title span{color:var(--theme-accent)}
.masthead-desc{
  font-size:1.05rem;color:var(--theme-text-dim);max-width:48ch;
  line-height:1.6;margin-bottom:32px;
}
.hc1{display:flex;gap:14px;flex-wrap:wrap}
.btn-solid{
  display:inline-flex;align-items:center;gap:8px;
  background:var(--theme-accent);color:#0c0e12;
  padding:13px 28px;border-radius:999px;
  font-weight:700;font-size:0.95rem;
  transition:transform .15s,box-shadow .15s;
  white-space:nowrap;
}
.btn-solid:hover{transform:translateY(-2px);box-shadow:0 8px 30px var(--theme-accent-glow);color:#0c0e12}
.btn-ghost{
  display:inline-flex;align-items:center;gap:8px;
  background:transparent;color:#f0f0f0;
  padding:13px 28px;border-radius:999px;
  font-weight:600;font-size:0.95rem;
  border:1px solid var(--theme-border-strong);
  transition:border-color .2s,background .2s;
  white-space:nowrap;
}
.btn-ghost:hover{border-color:var(--theme-accent);background:var(--theme-accent-dim);color:#f0f0f0}
.hv{position:relative;aspect-ratio:4/3;border-radius:16px;overflow:hidden;box-shadow:0 20px 60px rgba(0,0,0,0.4),0 0 0 1px rgba(255,255,255,0.06)}
.hvp{
  width:100%;height:100%;display:flex;align-items:center;justify-content:center;
  color:var(--theme-text-muted);font-size:0.85rem;
}
.hv img{width:100%;height:100%;object-fit:cover}

/* === SECTIONS === */
.block{padding:80px 0}
.block-shaded{background:var(--theme-bg2)}
.block-head{margin-bottom:48px}
.block-head.c{text-align:center}
.se{
  font-size:0.7rem;text-transform:uppercase;letter-spacing:0.22em;
  color:var(--theme-accent);margin-bottom:12px;font-weight:600;
}
.block-title{font-size:clamp(1.5rem,3vw,2.25rem);margin-bottom:12px}
.sd{color:var(--theme-text-dim);max-width:60ch;font-size:0.95rem;line-height:1.6}

/* === FEATURES GRID === */
.fg{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(240px,1fr));
  gap:28px;
}
.fc{
  background:var(--theme-bg-card);border:1px solid var(--theme-border);
  border-radius:var(--theme-radius);padding:32px 28px;
  transition:border-color .25s,transform .25s;
}
.fc:hover{border-color:var(--theme-border-strong);transform:translateY(-2px)}
.fi{
  width:64px;height:64px;border-radius:var(--theme-radius-sm);
  background:var(--theme-accent-dim);display:flex;align-items:center;
  justify-content:center;margin-bottom:20px;font-size:1.3rem;
}
.fc h3{font-size:1.05rem;margin-bottom:10px}
.fc p{font-size:0.9rem;color:var(--theme-text-dim);line-height:1.6;margin:0}

/* === STATS === */
.sg{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(200px,1fr));
  gap:20px;
}
.sc{
  text-align:center;padding:32px 20px;
  background:var(--theme-bg-card);border:1px solid var(--theme-border);
  border-radius:var(--theme-radius);
}
.sv{
  font-size:2.5rem;font-weight:800;color:var(--theme-accent);
  letter-spacing:-0.02em;line-height:1;
}
.sl{font-size:0.85rem;color:var(--theme-text-dim);margin-top:8px}

/* === NEWS (2-col large cards) === */
.ng{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(320px,1fr));
  gap:24px;
}
.nc{
  background:var(--theme-bg-card);border:1px solid var(--theme-border);
  border-radius:var(--theme-radius);overflow:hidden;
  transition:border-color .25s,transform .25s;
  display:flex;flex-direction:column;
}
.nc:hover{border-color:var(--theme-border-strong);transform:translateY(-2px)}
.nci{
  width:100%;height:200px;
  background:linear-gradient(135deg,var(--theme-bg3),var(--theme-bg2));
  display:flex;align-items:center;justify-content:center;
  color:var(--theme-text-muted);font-size:0.8rem;
;overflow:hidden}
.nci img{width:100%;height:100%;object-fit:cover}
.ncb{padding:20px 24px 24px;flex:1;display:flex;flex-direction:column}
.ncb h3{font-size:1.05rem;margin-bottom:8px}
.ncb h3 a{color:#f0f0f0}
.ncb h3 a:hover{color:var(--theme-accent)}
.ncd{font-size:0.9rem;color:var(--theme-text-dim);line-height:1.6;margin-bottom:12px;flex:1}
.ncd1{font-size:0.78rem;color:var(--theme-text-muted)}

/* === GUIDE (3-col cards) === */
.gg{
  display:grid;
  grid-template-columns:repeat(auto-fit,minmax(280px,1fr));
  gap:24px;
}
.gc{
  background:var(--theme-bg-card);border:1px solid var(--theme-border);
  border-radius:var(--theme-radius);overflow:hidden;
  transition:border-color .25s,transform .25s;
}
.gc:hover{border-color:var(--theme-border-strong);transform:translateY(-2px)}
.gci{
  width:100%;height:180px;
  background:linear-gradient(135deg,var(--theme-bg3),var(--theme-bg2));
  display:flex;align-items:center;justify-content:center;
  color:var(--theme-text-muted);font-size:0.8rem;
;overflow:hidden}
.gci img{width:100%;height:100%;object-fit:cover}
.gcb{padding:18px 20px 20px}
.gcb h3{font-size:1rem;margin-bottom:6px}
.gcb h3 a{color:#f0f0f0}
.gcb h3 a:hover{color:var(--theme-accent)}
.gcb p{font-size:0.85rem;color:var(--theme-text-dim);line-height:1.5;margin:0}

/* === TRUST / PARTNER LOGO WALL === */
.tg{
  display:flex;flex-wrap:wrap;align-items:center;justify-content:center;
  gap:40px 48px;padding:20px 0;
}
.ti{
  height:56px;display:flex;align-items:center;
  opacity:0.85;transition:opacity .3s;
}
.ti svg,.ti img{height:100%;width:auto}
.ti:hover{opacity:0.8}

/* === FOOTER === */
.page-footer{
  background:var(--theme-bg2);border-top:1px solid var(--theme-border);
  padding:56px 0 32px;
}
.fg1{
  display:grid;
  grid-template-columns:2fr 1fr 1fr 1fr;
  gap:40px;margin-bottom:40px;
}
.fb p{color:var(--theme-text-dim);font-size:0.9rem;line-height:1.7;margin-top:12px;max-width:36ch}
.fc1 h4{font-size:0.85rem;text-transform:uppercase;letter-spacing:0.08em;margin-bottom:16px;color:var(--theme-text)}
.fc1 ul{list-style:none}
.fc1 ul li{margin-bottom:10px}
.fc1 ul li a{color:var(--theme-text-dim);font-size:0.9rem;transition:color .2s}
.fc1 ul li a:hover{color:#f0f0f0}
.fb1{
  border-top:1px solid var(--theme-border);padding-top:24px;
  display:flex;justify-content:space-between;flex-wrap:wrap;gap:12px;
  font-size:0.8rem;color:var(--theme-text-muted);
}
.fb1 a{color:var(--theme-text-dim)}

/* === BREADCRUMB === */
.crumbs{padding:16px 0;font-size:0.85rem}
.crumbs ol{list-style:none;display:flex;flex-wrap:wrap;gap:4px;align-items:center}
.crumbs li{color:var(--theme-text-dim);display:flex;align-items:center;gap:4px}
.crumbs a{color:var(--theme-text-dim)}
.crumbs a:hover{color:var(--theme-accent)}
.crumbs .s{color:var(--theme-text-muted);margin:0 4px}

/* === ARTICLE LIST (栏目页) === */
.al{display:flex;flex-direction:column;gap:0}
.ali{
  display:grid;grid-template-columns:1fr auto;
  gap:20px;padding:22px 0;border-bottom:1px solid var(--theme-border);
  align-items:start;
}
.ali:last-child{border-bottom:none}
.ali h3{font-size:1.1rem;margin-bottom:6px}
.ali h3 a{color:#f0f0f0}
.ali h3 a:hover{color:var(--theme-accent)}
.ald{font-size:0.9rem;color:var(--theme-text-dim);line-height:1.6;margin-bottom:8px;max-width:80ch}
.ald1{font-size:0.78rem;color:var(--theme-text-muted);white-space:nowrap}

/* === ARTICLE DETAIL === */
.post{max-width:780px;margin:0 auto}
.post-head{margin-bottom:40px;padding-bottom:32px;border-bottom:1px solid var(--theme-border)}
.post-head h1{font-size:clamp(1.75rem,4vw,2.5rem);margin-bottom:16px}
.am{
  display:flex;gap:20px;flex-wrap:wrap;font-size:0.85rem;color:var(--theme-text-muted)
}
.post-body{line-height:1.9}
.post-body h2{
  font-size:1.35rem;margin:40px 0 16px;padding-bottom:8px;
  border-bottom:1px solid var(--theme-border)
}
.post-body h3{font-size:1.1rem;margin:28px 0 12px}
.post-body p{margin-bottom:20px;color:#c8c8d4}
.post-body ul,.post-body ol{margin-bottom:20px;padding-left:24px}
.post-body li{margin-bottom:8px;color:#c8c8d4}
.post-body img{max-width:100%;height:auto;border-radius:var(--theme-radius-sm);margin:24px 0}
.post-body blockquote{
  border-left:3px solid var(--theme-accent);padding:12px 20px;
  margin:24px 0;background:var(--theme-accent-dim);border-radius:0 var(--theme-radius-sm) var(--theme-radius-sm) 0;
  font-style:italic;color:var(--theme-text-dim);
}
.af{
  margin-top:48px;padding-top:24px;border-top:1px solid var(--theme-border);
}
.at{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:24px}
.at1{
  display:inline-block;padding:4px 12px;
  background:var(--theme-bg-card);border:1px solid var(--theme-border);
  border-radius:999px;font-size:0.78rem;color:var(--theme-text-dim);
}
.ra{margin-top:32px}
.ra h3{font-size:1.1rem;margin-bottom:16px}
.ra ul{list-style:none}
.ra ul li{margin-bottom:10px}
.ra ul li a{font-size:0.95rem}

/* === PAGINATION === */
.pager{
  display:flex;justify-content:center;gap:8px;margin-top:32px
}
.pager a,.pager span{
  display:inline-flex;align-items:center;justify-content:center;
  min-width:40px;height:40px;padding:0 12px;
  border:1px solid var(--theme-border);border-radius:var(--theme-radius-sm);
  font-size:0.9rem;color:var(--theme-text-dim);transition:all .2s;
}
.pager a:hover{border-color:var(--theme-accent);color:var(--theme-accent)}
.pager .c1{background:var(--theme-accent);color:#0c0e12;border-color:var(--theme-accent);font-weight:700}
.pager .d{opacity:0.3;pointer-events:none}

/* === 404 === */
.ep{text-align:center;padding:100px 0}
.ep h1{font-size:6rem;color:var(--theme-accent);line-height:1}
.ep p{color:var(--theme-text-dim);font-size:1.1rem;margin:16px 0 32px}
.el{display:flex;justify-content:center;gap:16px;flex-wrap:wrap}

/* === SCROLL REVEAL === */
.r{opacity:0;transform:translateY(24px);transition:opacity .6s ease,transform .6s ease}
.r.v{opacity:1;transform:translateY(0)}

/* === RISK WARNING === */
.notice{
  background:rgba(239,68,68,0.04);border:1px solid rgba(239,68,68,0.14);
  border-radius:var(--theme-radius-sm);padding:16px 20px;
  font-size:0.85rem;color:var(--theme-text-dim);line-height:1.6;margin-top:32px;
}
.notice strong{color:var(--theme-accent)}

/* === SECTION DIVIDER (subtle) === */
.sd1{height:1px;background:var(--theme-border);max-width:var(--theme-max-w);margin:0 auto}

/* === RESPONSIVE === */
@media (max-width:768px){
  .menu{display:none}
  .menu.o{
    display:flex;flex-direction:column;
    position:absolute;top:var(--theme-header-h);left:0;right:0;
    background:rgba(12,14,18,0.98);backdrop-filter:blur(16px);
    padding:24px;gap:20px;border-bottom:1px solid var(--theme-border);
  }
  .nt{display:block}
  .masthead .wrapper{grid-template-columns:1fr;gap:40px}
  .hv{}
  .fg1{grid-template-columns:1fr 1fr;gap:32px}
  .ali{grid-template-columns:1fr}
}
@media (max-width:480px){
  .masthead{padding:48px 0 56px}
  .hc1{flex-direction:column}
  .block{padding:56px 0}
  .sg{grid-template-columns:1fr 1fr}
  .fg1{grid-template-columns:1fr}
  .pager a,.pager span{min-width:36px;height:36px;font-size:0.8rem}
  .ng{grid-template-columns:1fr}
  .gg{grid-template-columns:1fr}
}

/* === NAV LOGO IMG === */
.brand img{display:block;height:36px;width:auto}
.fb .brand img{height:32px}

/* === REDUCED MOTION === */
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  .r{opacity:1;transform:none;transition:none}
  .btn-solid,.btn-ghost,.menu-btn,.nc,.gc,.bc,.fc{transition:none}
  .btn-solid:hover,.btn-ghost:hover,.menu-btn:hover,.nc:hover,.gc:hover,.bc:hover,.fc:hover{transform:none;box-shadow:none}
}

/* === SECURITY HERO (kaygb variant) === */
.security-hero{padding:64px 0 0}
.security-hero .wrapper{display:grid;grid-template-columns:1.15fr 0.85fr;gap:56px;align-items:center}
.security-hero .hc{text-align:left}
.security-hero .masthead-desc{margin:0 0 32px}
.security-hero .hc1{justify-content:flex-start}
.threat-board{
  background:#12151b;border:1px solid #232733;border-radius:10px;overflow:hidden;
  box-shadow:0 16px 48px rgba(0,0,0,0.4);
}
.threat-board .tb-head{
  padding:14px 20px;border-bottom:1px solid #232733;display:flex;align-items:center;gap:10px;
  font-size:0.85rem;font-weight:700;color:#e8eaee;letter-spacing:0.04em;
}
.threat-board .tb-head .dot{width:9px;height:9px;border-radius:50%;background:#ef4444;box-shadow:0 0 8px #ef4444}
.threat-board .tb-body{padding:8px 20px}
.tb-row{display:flex;align-items:center;justify-content:space-between;padding:10px 0;border-bottom:1px solid #1a1e26;font-size:0.88rem}
.tb-row:last-of-type{border-bottom:none}
.tb-row .k{color:#8f96a3}
.tb-row .v{color:#e8eaee;font-weight:700}
.tb-row .v.warn{color:#ef4444}
.tb-foot{padding:12px 20px;border-top:1px solid #232733;font-size:0.8rem;color:#8f96a3;background:#101318}
/* === ALERT LIST === */
.alert-list{border:1px solid #232733;border-radius:10px;overflow:hidden;background:#12151b}
.alert-item{
  display:flex;align-items:center;gap:16px;padding:16px 20px;
  border-bottom:1px solid #1a1e26;text-decoration:none;color:var(--theme-text);
}
.alert-item:last-child{border-bottom:none}
.alert-item:hover{background:#151922}
.alert-item .sev{
  flex-shrink:0;padding:3px 10px;border-radius:4px;font-size:0.7rem;font-weight:700;letter-spacing:0.05em;
  background:rgba(239,68,68,0.12);color:#f87171;
}
.alert-item .sev.mid{background:rgba(249,115,22,0.12);color:#fb923c}
.alert-item .sev.low{background:rgba(16,185,129,0.12);color:#34d399}
.alert-item .al-body{flex:1;min-width:0}
.alert-item .al-title{font-size:0.92rem;margin-bottom:4px;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden}
.alert-item .al-desc{font-size:0.78rem;color:#8f96a3;display:-webkit-box;-webkit-line-clamp:1;-webkit-box-orient:vertical;overflow:hidden}
.alert-item .al-date{flex-shrink:0;font-size:0.75rem;color:#5f6672}
/* === DEFENSE CARDS === */
.defense-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.defense-card{
  background:#12151b;border:1px solid #232733;border-radius:10px;padding:20px;
  transition:border-color .2s,box-shadow .2s;
}
.defense-card:hover{border-color:#ef4444;box-shadow:0 10px 28px rgba(0,0,0,0.35)}
.defense-card .dc-tag{
  display:inline-block;padding:3px 10px;border-radius:4px;background:rgba(239,68,68,0.1);
  color:#f87171;font-size:0.72rem;font-weight:700;letter-spacing:0.04em;margin-bottom:12px;
}
.defense-card h3{font-size:0.98rem;margin:0 0 8px}
.defense-card h3 a{color:#e8eaee}
.defense-card p{font-size:0.82rem;color:#8f96a3;line-height:1.6;margin:0 0 12px;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.defense-card .dc-meta{font-size:0.75rem;color:#5f6672}
/* === RESPONSIVE === */
@media (max-width:768px){
  .security-hero .wrapper{grid-template-columns:1fr;gap:36px}
  .defense-grid{grid-template-columns:1fr}
  .alert-item{flex-wrap:wrap;gap:6px 12px}
  .alert-item .al-body{flex-basis:100%;order:3}
}