/* ============================================================
   kill-chain.css — 攻击链(Kill Chain)专题四页共用样式
   自包含：基础框架 + 组件 + 响应式（与全站风格一致）
   ============================================================ */
:root{
  --primary:#1a6eff; --primary-dark:#0d4fc4; --primary-light:#e8f1ff;
  --primary-gradient:linear-gradient(135deg,#1a6eff 0%,#0d4fc4 100%);
  --text:#1a1d29; --text-secondary:#5a5f73; --text-light:#9aa0b4;
  --bg-warm:#f7f8fc; --bg-card:#ffffff; --border:#e6e8f2;
  --radius:16px; --radius-sm:10px;
  --shadow:0 4px 20px rgba(26,30,60,.06); --shadow-hover:0 12px 32px rgba(26,30,60,.12);
  --transition:all .3s ease;
  --warning:#e8890c; --warning-light:#fdf3e3;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:'Noto Sans SC','PingFang SC','Microsoft YaHei',sans-serif;color:var(--text);background:#fff;line-height:1.6;-webkit-font-smoothing:antialiased}
a{color:var(--primary);text-decoration:none}
a:hover{text-decoration:underline}
.container{max-width:1200px;margin:0 auto;padding:0 24px}
.section{padding:80px 0}
.section-alt{background:var(--bg-warm)}

/* 阅读进度条 */
.read-progress{position:fixed;top:0;left:0;height:3px;width:0;background:var(--primary-gradient);z-index:1001;transition:width .1s linear}

/* ===== 导航栏 ===== */
.navbar{position:fixed;top:0;left:0;right:0;height:72px;background:rgba(255,255,255,.92);backdrop-filter:blur(12px);border-bottom:1px solid var(--border);z-index:1000;transition:var(--transition)}
.navbar.scrolled{box-shadow:var(--shadow)}
.nav-container{max-width:1200px;margin:0 auto;padding:0 24px;height:72px;display:flex;align-items:center;justify-content:space-between}
.logo{display:flex;align-items:center;gap:10px;text-decoration:none}
.logo-icon{width:38px;height:38px;border-radius:10px;background:var(--primary-gradient);display:flex;align-items:center;justify-content:center;overflow:hidden;flex-shrink:0}
.logo-icon img{width:100%;height:100%;object-fit:cover}
.logo-text{font-size:16px;font-weight:800;color:var(--text);line-height:1.2}
.logo-text span{display:block;font-size:10px;font-weight:500;color:var(--text-light);letter-spacing:.5px}
.nav-links{display:flex;list-style:none;gap:4px}
.nav-links a{display:block;padding:8px 14px;font-size:14px;font-weight:500;color:var(--text-secondary);border-radius:8px;transition:var(--transition)}
.nav-links a:hover,.nav-links a.active{color:var(--primary);background:var(--primary-light)}
.mobile-toggle{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:8px}
.mobile-toggle span{display:block;width:22px;height:2px;background:var(--text);border-radius:2px;transition:var(--transition)}

/* ===== 子页 Hero ===== */
.sub-hero{position:relative;min-height:420px;display:flex;align-items:center;justify-content:center;overflow:hidden;background:linear-gradient(180deg,#f0f5ff 0%,#ffffff 100%);padding-top:72px}
.sub-hero::after{content:'';position:absolute;inset:0;background:radial-gradient(ellipse at 70% 20%,rgba(26,110,255,.08),transparent 60%);pointer-events:none}
.sub-hero-content{position:relative;z-index:2;max-width:900px;text-align:center;padding:48px 24px}
.sub-hero-badge{display:inline-flex;align-items:center;gap:8px;background:rgba(26,110,255,.08);color:var(--primary);font-size:13px;font-weight:600;padding:8px 20px;border-radius:100px;margin-bottom:20px;border:1px solid rgba(26,110,255,.15)}
.sub-hero h1{font-size:clamp(28px,4vw,44px);font-weight:900;line-height:1.2;color:var(--text);margin-bottom:16px;letter-spacing:-.5px}
.sub-hero p{font-size:clamp(14px,2vw,17px);color:var(--text-secondary);max-width:680px;margin:0 auto;line-height:1.8}

/* 面包屑 */
.breadcrumb-wrap{background:#fff;border-bottom:1px solid var(--border)}
.breadcrumb{max-width:1200px;margin:0 auto;padding:16px 24px;font-size:13px;color:var(--text-light);display:flex;align-items:center;flex-wrap:wrap;gap:8px}
.breadcrumb a{color:var(--primary);font-weight:500}
.breadcrumb .sep{color:var(--border)}
.breadcrumb .current{color:var(--text-secondary);font-weight:600}

/* ===== 内容布局 ===== */
.content-grid{display:grid;grid-template-columns:280px 1fr;gap:40px;align-items:start}
.content-sidebar{position:sticky;top:96px}
.sidebar-nav{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:20px;box-shadow:var(--shadow)}
.sidebar-nav h4{font-size:13px;font-weight:700;color:var(--text-light);text-transform:uppercase;letter-spacing:1px;margin-bottom:14px}
.sidebar-nav ul{list-style:none}
.sidebar-nav li{margin-bottom:4px}
.sidebar-nav a{display:block;padding:8px 12px;border-radius:8px;font-size:13.5px;color:var(--text-secondary);font-weight:500;transition:var(--transition)}
.sidebar-nav a:hover,.sidebar-nav a.active{color:var(--primary);background:var(--primary-light)}
.sidebar-pager{margin-top:16px;display:flex;flex-direction:column;gap:8px}
.pg-prev,.pg-next{display:flex;align-items:center;gap:8px;padding:10px 14px;border-radius:10px;font-size:12.5px;font-weight:600;background:#fff;border:1px solid var(--border);color:var(--text-secondary);transition:var(--transition)}
.pg-prev:hover,.pg-next:hover{border-color:var(--primary);color:var(--primary);background:var(--primary-light)}
.pg-prev svg,.pg-next svg{width:14px;height:14px;flex-shrink:0}
.pg-disabled{padding:10px 14px;font-size:12.5px;color:var(--text-light);background:var(--bg-warm);border-radius:10px;text-align:center}
.content-main{min-width:0}

/* 章节 */
.content-section{margin-bottom:56px}
.sec-no{display:inline-block;font-size:11px;font-weight:800;letter-spacing:2px;color:var(--primary);background:var(--primary-light);padding:4px 12px;border-radius:100px;margin-bottom:12px}
.content-section h2{font-size:23px;font-weight:800;color:var(--text);margin-bottom:20px;padding-bottom:14px;border-bottom:2px solid var(--border)}
.content-section h3{font-size:17px;font-weight:700;color:var(--text);margin:28px 0 12px}
.content-section h4{font-size:15px;font-weight:700;color:var(--text);margin:18px 0 8px}
.content-section p{font-size:15px;color:var(--text-secondary);line-height:1.85;margin-bottom:16px}
.content-section ul,.content-section ol{margin:0 0 16px 20px}
.content-section li{font-size:14.5px;color:var(--text-secondary);line-height:1.8;margin-bottom:8px}
.content-section strong,.content-section b{color:var(--text)}
.content-section code{font-family:ui-monospace,Menlo,Consolas,monospace;font-size:.88em;background:var(--bg-warm);border:1px solid var(--border);padding:1px 6px;border-radius:6px}
.qa-item{background:#fff;border:1px solid var(--border);border-left:4px solid var(--primary);border-radius:0 var(--radius-sm) var(--radius-sm) 0;padding:16px 20px;margin-bottom:12px}
.qa-item h4{margin:0 0 6px;font-size:14.5px;color:var(--primary-dark)}
.qa-item p{margin:0;font-size:13.5px}

/* 表格 */
.table-scroll{overflow-x:auto;border:1px solid var(--border);border-radius:var(--radius);background:#fff;box-shadow:var(--shadow);margin:20px 0;-webkit-overflow-scrolling:touch}
.kc-table{width:100%;border-collapse:collapse;font-size:13px;min-width:640px}
.kc-table th{background:var(--primary-light);color:var(--primary-dark);font-weight:700;text-align:left;padding:12px 14px;white-space:nowrap;border-bottom:2px solid rgba(26,110,255,.15);font-size:12.5px}
.kc-table td{padding:11px 14px;border-bottom:1px solid var(--border);color:var(--text-secondary);vertical-align:top;line-height:1.7}
.kc-table tr:last-child td{border-bottom:none}
.kc-table tbody tr{transition:var(--transition)}
.kc-table tbody tr:hover{background:var(--bg-warm)}
.kc-table td strong{color:var(--text)}
.coa-table td:not(:first-child),.coa-table th:not(:first-child){text-align:center}
.coa-dot{display:inline-block;width:13px;height:13px;border-radius:50%}
.coa-dot.on{background:var(--primary-gradient);box-shadow:0 2px 6px rgba(26,110,255,.4)}
.coa-dot.opt{border:2px solid var(--primary);opacity:.45}

/* 引用/提示框 */
.quote-box{background:linear-gradient(135deg,#f0f5ff 0%,#e8f1ff 100%);border-left:4px solid var(--primary);border-radius:0 var(--radius-sm) var(--radius-sm) 0;padding:22px 26px;margin:24px 0}
.quote-box p{font-size:14px;color:var(--text-secondary);line-height:1.85;margin:0 0 10px;font-style:italic}
.q-src{font-size:12px;color:var(--text-light);font-style:normal}
.info-box{background:var(--primary-light);border-left:4px solid var(--primary);border-radius:0 var(--radius-sm) var(--radius-sm) 0;padding:18px 22px;margin:20px 0}
.info-box p{font-size:13.5px;color:var(--text-secondary);line-height:1.8;margin:0}
.info-box p strong{color:var(--primary-dark)}
.warn-box{background:var(--warning-light);border-left:4px solid var(--warning);border-radius:0 var(--radius-sm) var(--radius-sm) 0;padding:18px 22px;margin:20px 0}
.warn-box p{font-size:13.5px;color:#7c4a2d;line-height:1.8;margin:0}
.warn-box p strong{color:var(--warning)}

/* 阶段速查卡 */
.stage-card{display:flex;gap:18px;background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:22px;margin-top:24px;box-shadow:var(--shadow);position:relative;overflow:hidden}
.stage-card::before{content:'';position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--primary-gradient)}
.stage-card canvas{width:56px;height:56px;flex-shrink:0}
.stage-card h4{font-size:15px;margin:0 0 6px;color:var(--primary-dark)}
.stage-card p{font-size:12.5px;margin:0 0 6px;line-height:1.7}
.stage-tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:6px}
.stage-tags span{font-size:11px;color:var(--primary);background:var(--primary-light);padding:3px 10px;border-radius:100px;font-weight:600}

/* 迷你时间线 */
.mini-timeline{position:relative;margin:24px 0;padding-left:26px;border-left:2px solid var(--border)}
.mt-item{position:relative;margin-bottom:18px}
.mt-item::before{content:'';position:absolute;left:-32px;top:6px;width:12px;height:12px;background:#fff;border:3px solid var(--primary);border-radius:50%}
.mt-year{display:inline-block;font-size:12px;font-weight:800;color:var(--primary);background:var(--primary-light);padding:2px 12px;border-radius:100px;margin-bottom:6px}
.mt-item p{font-size:13.5px;margin:0}

/* 指标条 */
.metric-strip{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin:24px 0}
.metric-cell{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:20px;text-align:center;box-shadow:var(--shadow);position:relative;overflow:hidden}
.metric-cell::before{content:'';position:absolute;top:0;left:0;right:0;height:2px;background:var(--primary-gradient);opacity:.6}
.m-num{font-size:30px;font-weight:900;color:var(--primary);line-height:1;font-variant-numeric:tabular-nums}
.m-lab{font-size:13px;font-weight:700;margin-top:8px;color:var(--text)}
.m-src{font-size:11px;color:var(--text-light);margin-top:6px;line-height:1.5}

/* 阶段徽标（案例库） */
.stage-badges{display:inline-flex;gap:4px;flex-wrap:wrap}
.stage-badges i{width:21px;height:21px;border-radius:50%;color:#fff;font-size:11px;font-weight:800;font-style:normal;display:inline-flex;align-items:center;justify-content:center}
.sb1{background:linear-gradient(135deg,#667eea,#764ba2)}
.sb2{background:linear-gradient(135deg,#f093fb,#f5576c)}
.sb3{background:linear-gradient(135deg,#4facfe,#00f2fe)}
.sb4{background:linear-gradient(135deg,#43e97b,#38f9d7)}
.sb5{background:linear-gradient(135deg,#fa709a,#fee140)}
.sb6{background:linear-gradient(135deg,#30cfd0,#330867)}
.sb7{background:linear-gradient(135deg,#ff0844,#ffb199)}

/* 成熟度条 */
.maturity-demo{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow)}
.maturity-row{display:flex;align-items:center;gap:14px;margin-bottom:14px}
.maturity-row:last-child{margin-bottom:0}
.m-label{width:110px;font-size:13px;font-weight:700;color:var(--text);flex-shrink:0}
.maturity-bar{flex:1;height:14px;background:var(--bg-warm);border-radius:100px;overflow:hidden}
.maturity-bar i{display:block;height:100%;width:0;border-radius:100px;background:var(--primary-gradient);transition:width 1.2s cubic-bezier(.22,1,.36,1)}
.m-val{width:38px;font-size:13px;font-weight:800;color:var(--primary);text-align:right;font-variant-numeric:tabular-nums}

/* 术语表 */
.glossary-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}
.glossary-item{background:#fff;border:1px solid var(--border);border-radius:var(--radius-sm);padding:16px 18px;transition:var(--transition)}
.glossary-item:hover{border-color:rgba(26,110,255,.25);box-shadow:var(--shadow)}
.glossary-item dt{font-size:14px;font-weight:700;color:var(--primary-dark);margin-bottom:6px}
.glossary-item dd{font-size:12.5px;color:var(--text-secondary);line-height:1.7;margin:0}

/* 参考文献 */
.ref-list{list-style:none;counter-reset:ref;display:flex;flex-direction:column;gap:14px;margin:20px 0}
.ref-list li{counter-increment:ref;position:relative;padding-left:42px;font-size:13px;color:var(--text-secondary);line-height:1.75}
.ref-list li::before{content:counter(ref,decimal-leading-zero);position:absolute;left:0;top:2px;width:28px;height:28px;background:var(--primary-light);color:var(--primary);font-size:11.5px;font-weight:800;border-radius:8px;display:flex;align-items:center;justify-content:center}
.ref-title{font-weight:700;color:var(--text)}
.ref-src{font-size:12px;color:var(--text-light)}
.ref-link{font-size:12px;word-break:break-all}
.ref-link:hover{text-decoration:underline}

/* Kill Chain 图 */
.kc-diagram-box{background:#fff;border:1px solid var(--border);border-radius:var(--radius);padding:28px;margin:24px 0;box-shadow:var(--shadow)}
.kc-diagram-box canvas{width:100%;display:block}
.kc-diagram-caption{font-size:12px;color:var(--text-light);text-align:center;margin-top:12px}

/* 分页器 */
.kc-pager{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-top:56px;padding-top:28px;border-top:2px solid var(--border)}
.kc-pager-btn{display:flex;align-items:center;gap:12px;padding:14px 20px;border-radius:12px;border:1.5px solid var(--border);background:#fff;font-size:13px;color:var(--text-secondary);transition:var(--transition);max-width:48%}
.kc-pager-btn:hover{border-color:var(--primary);color:var(--primary);box-shadow:var(--shadow);text-decoration:none}
.kc-pager-btn .pg-arrow{width:34px;height:34px;border-radius:50%;background:var(--primary-light);display:flex;align-items:center;justify-content:center;flex-shrink:0}
.kc-pager-btn .pg-arrow svg{width:16px;height:16px;color:var(--primary)}
.kc-pager-btn .pg-dir{display:block;font-size:11px;font-weight:600;color:var(--text-light)}
.kc-pager-btn .pg-title{display:block;font-size:13.5px;font-weight:700;color:var(--text);margin-top:2px}
.kc-pager-btn:hover .pg-title{color:var(--primary)}
.kc-pager-btn.disabled{opacity:.5;cursor:not-allowed;background:var(--bg-warm)}
.kc-pager-btn.disabled:hover{border-color:var(--border);color:var(--text-secondary);box-shadow:none}

/* ===== 页脚 ===== */
.footer{background:#0d1b3e;color:rgba(255,255,255,.75);padding:64px 0 32px;margin-top:40px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1fr;gap:40px;margin-bottom:48px}
.footer-brand p{font-size:13px;line-height:1.8;margin-top:16px;color:rgba(255,255,255,.6)}
.footer-col h4{font-size:14px;font-weight:700;color:#fff;margin-bottom:18px}
.footer-col ul{list-style:none}
.footer-col li{margin-bottom:10px}
.footer-col a{font-size:13px;color:rgba(255,255,255,.65);transition:var(--transition)}
.footer-col a:hover{color:#fff}
.footer-bottom{border-top:1px solid rgba(255,255,255,.12);padding-top:24px;text-align:center}
.footer-bottom p{font-size:12px;color:rgba(255,255,255,.45);margin-bottom:6px}
.footer-bottom a{color:rgba(255,255,255,.6)}
.footer .logo-icon{background:rgba(255,255,255,.1)}

/* 动效 */
.reveal{opacity:0;transform:translateY(24px);transition:opacity .7s ease,transform .7s ease}
.reveal.visible{opacity:1;transform:none}

/* ===== 响应式 ===== */
@media (max-width:1024px){
  .content-grid{grid-template-columns:1fr}
  .content-sidebar{position:static}
  .sidebar-pager{flex-direction:row}
  .metric-strip{grid-template-columns:repeat(2,1fr)}
  .glossary-grid{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr 1fr}
  .kc-pager-btn{max-width:100%}
}
@media (max-width:768px){
  .section{padding:48px 0}
  .nav-links{display:none;position:absolute;top:72px;left:0;right:0;background:#fff;flex-direction:column;padding:16px 24px;box-shadow:0 8px 24px rgba(0,0,0,.08);gap:4px;border-bottom:1px solid var(--border)}
  .nav-links.active{display:flex}
  .mobile-toggle{display:flex}
  .sub-hero{min-height:340px;padding-top:96px}
  .metric-strip{grid-template-columns:repeat(2,1fr);gap:10px}
  .m-num{font-size:24px}
  .stage-card{flex-direction:column;gap:12px;padding:18px}
  .stage-card canvas{width:44px;height:44px}
  .kc-table{font-size:12px;min-width:560px}
  .kc-table th,.kc-table td{padding:9px 10px}
  .m-label{width:86px;font-size:12px}
  .m-val{width:32px;font-size:12px}
  .kc-pager{flex-direction:column}
  .kc-pager-btn{width:100%;max-width:100%}
  .footer-grid{grid-template-columns:1fr;gap:28px}
  .sidebar-pager{flex-direction:column}
  .content-section h2{font-size:19px}
  .breadcrumb{font-size:12px}
}