/* =========================================================
   破晓前哨 DawnSentinel · 共享样式 v1.0
   ========================================================= */
:root{
  --navy:#1F4E79;
  --navy-d:#1F3864;
  --navy-l:#2A6EA8;
  --accent:#4A9EFF;
  --orange:#D97706;
  --green:#059669;
  --purple:#9333EA;
  --red:#DC2626;
  --ink:#12243A;
  --muted:#66788E;
  --slate:#94A3B8;
  --line:#E3EAF3;
  --line-d:#C7D2E0;
  --bg:#F4F7FB;
  --bg-d:#E8EFF8;
  --pink:#FDEEF4;
  --pink-d:#F8D7E2;
  --amber:#FEF3C7;
  --amber-d:#FDE68A;
  --shadow:0 4px 18px rgba(31,78,121,.05);
  --shadow-h:0 8px 28px rgba(31,78,121,.10);
  --radius:14px;
  --radius-s:8px;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:"Microsoft YaHei","PingFang SC","Helvetica Neue",Arial,sans-serif;
  background:var(--bg);
  color:var(--ink);
  line-height:1.75;
  font-size:15px;
  -webkit-font-smoothing:antialiased;
}
a{color:var(--navy);text-decoration:none;border-bottom:1px solid rgba(31,78,121,.25);transition:color .2s}
a:hover{color:var(--navy-d);border-bottom-color:var(--navy-d)}
img{max-width:100%;display:block}
code,kbd{font-family:"SF Mono",Consolas,"Courier New",monospace;font-size:.92em;background:var(--bg-d);padding:2px 6px;border-radius:4px;color:var(--navy-d)}
pre{background:var(--navy-d);color:#E8EFF8;padding:16px 18px;border-radius:var(--radius-s);overflow-x:auto;font-size:13px;line-height:1.6}
pre code{background:transparent;color:inherit;padding:0}

/* ===== 顶部导航栏 ===== */
.topnav{
  position:sticky;top:0;z-index:100;
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(12px);
  border-bottom:1px solid var(--line);
  height:62px;
  display:flex;align-items:center;
}
.topnav .inner{max-width:1180px;margin:0 auto;padding:0 24px;width:100%;display:flex;align-items:center;gap:24px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;color:var(--navy-d);font-size:17px;letter-spacing:1px;border-bottom:none}
.brand:hover{color:var(--navy-d)}
.brand .logo{width:30px;height:30px;border-radius:7px;background:linear-gradient(135deg,var(--navy-d),var(--navy) 60%,var(--navy-l));display:flex;align-items:center;justify-content:center;color:#fff;font-weight:900;font-size:13px;letter-spacing:0}
.brand .bname{display:flex;flex-direction:column;line-height:1.15}
.brand .bname .cn{font-size:15px}
.brand .bname .en{font-size:10px;color:var(--muted);letter-spacing:2px;font-weight:600}
.nav-links{display:flex;gap:6px;margin-left:24px;flex:1}
.nav-links a{
  padding:7px 14px;border-radius:8px;font-size:14px;color:var(--ink);
  border-bottom:none;font-weight:500;transition:all .2s;
}
.nav-links a:hover{background:var(--bg-d);color:var(--navy-d)}
.nav-links a.active{background:var(--navy);color:#fff}
.nav-cta{padding:8px 18px;background:linear-gradient(135deg,var(--orange),#B45309);color:#fff !important;border-radius:8px;font-weight:700;font-size:13.5px;border-bottom:none;box-shadow:0 2px 8px rgba(217,119,6,.25)}
.nav-cta:hover{transform:translateY(-1px);box-shadow:0 4px 12px rgba(217,119,6,.35)}
.menu-btn{display:none;background:none;border:none;color:var(--navy-d);font-size:22px;cursor:pointer;padding:6px}

/* ===== Hero 区 ===== */
.hero{background:linear-gradient(135deg,var(--navy-d),var(--navy) 60%,var(--navy-l));color:#fff;padding:80px 24px 70px;text-align:center;position:relative;overflow:hidden}
.hero::before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background:radial-gradient(circle at 80% 20%,rgba(74,158,255,.18),transparent 50%),radial-gradient(circle at 20% 80%,rgba(255,255,255,.06),transparent 50%)}
.hero>*{position:relative;z-index:1}
.hero .brand-line{font-size:13px;letter-spacing:6px;opacity:.75;text-transform:uppercase;margin-bottom:14px}
.hero h1{font-size:clamp(28px,5vw,44px);margin-bottom:10px;letter-spacing:2px;font-weight:800;line-height:1.2}
.hero .sub{font-size:15.5px;opacity:.85;max-width:680px;margin:0 auto;line-height:1.8}
.hero .meta{margin-top:22px;display:flex;gap:10px;justify-content:center;flex-wrap:wrap}
.hero .meta span{font-size:12.5px;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.28);border-radius:20px;padding:5px 14px}

/* ===== 主体容器 ===== */
.wrap{max-width:1180px;margin:0 auto;padding:0 24px}

/* ===== 区块标题 ===== */
.sec-title{display:flex;align-items:baseline;gap:12px;margin:36px 0 18px;flex-wrap:wrap}
.sec-title h2{font-size:24px;color:var(--navy-d);font-weight:800;letter-spacing:1px}
.sec-title .num{font-size:12px;color:var(--accent);background:rgba(74,158,255,.10);padding:4px 12px;border-radius:20px;font-weight:700}
.sec-title .hint{font-size:13px;color:var(--slate)}
.sec-title .more{margin-left:auto;color:var(--navy);font-size:13px;border-bottom:none;font-weight:600}

/* ===== 卡片 ===== */
.card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:24px 26px;box-shadow:var(--shadow);transition:box-shadow .2s,transform .2s}
.card:hover{box-shadow:var(--shadow-h)}
.card.b{border-left:4px solid var(--orange)}
.card.g{border-left:4px solid var(--green)}
.card.a{border-left:4px solid var(--accent)}
.card.p{border-left:4px solid var(--purple)}

/* ===== 网格 ===== */
.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:16px}
.grid-2{display:grid;grid-template-columns:repeat(2,1fr);gap:16px}
.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:14px}

/* ===== 标签 ===== */
.tag{display:inline-block;font-size:11.5px;color:var(--navy);background:#E8EFF8;padding:3px 10px;border-radius:10px;font-weight:600;margin:2px 3px 2px 0;border:none}
.tag.orange{background:#FEE7D6;color:var(--orange)}
.tag.green{background:#D1FAE5;color:var(--green)}
.tag.purple{background:#E9D5FF;color:var(--purple)}
.tag.gray{background:#F1F5F9;color:var(--slate)}

/* ===== 按钮 ===== */
.btn{display:inline-block;padding:10px 22px;border-radius:8px;font-weight:600;font-size:14px;transition:all .2s;cursor:pointer;border:none;border-bottom:none}
.btn-pri{background:linear-gradient(135deg,var(--navy),var(--navy-d));color:#fff}
.btn-pri:hover{color:#fff;transform:translateY(-1px);box-shadow:0 4px 12px rgba(31,78,121,.3)}
.btn-orange{background:linear-gradient(135deg,var(--orange),#B45309);color:#fff;box-shadow:0 2px 8px rgba(217,119,6,.25)}
.btn-orange:hover{color:#fff;transform:translateY(-1px);box-shadow:0 4px 12px rgba(217,119,6,.35)}
.btn-ghost{background:transparent;color:var(--navy);border:1px solid var(--navy)}
.btn-ghost:hover{background:var(--bg-d)}

/* ===== KPI 仪表盘 ===== */
.kpi{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:18px}
.kpi .box{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:20px 22px;box-shadow:var(--shadow);position:relative;overflow:hidden}
.kpi .box::before{content:"";position:absolute;top:0;left:0;width:4px;height:100%;background:var(--accent)}
.kpi .box.b::before{background:var(--orange)}
.kpi .box.c::before{background:var(--green)}
.kpi .box.d::before{background:var(--navy)}
.kpi .lab{font-size:12px;color:var(--muted);letter-spacing:1px}
.kpi .val{font-size:30px;font-weight:800;color:var(--navy-d);margin-top:6px;line-height:1.1}
.kpi .sub2{font-size:12px;color:var(--slate);margin-top:6px}

/* ===== 表格 ===== */
table.t{width:100%;border-collapse:collapse;font-size:13px;border:1px solid var(--line)}
table.t th{background:#E8EFF8;color:var(--navy-d);font-weight:700;text-align:left;padding:11px 13px;border:1px solid var(--line);font-size:12.5px}
table.t td{padding:11px 13px;border:1px solid var(--line);color:var(--ink);vertical-align:top;line-height:1.6}
table.t tr:nth-child(even) td{background:#FAFBFD}
table.t .center{text-align:center}

/* ===== AI 高亮段 ===== */
.observe{display:flex;gap:10px;margin-top:12px;padding:12px 14px;background:var(--pink);border-left:4px solid #EC4899;border-radius:0 10px 10px 0}
.observe .o-mark{flex-shrink:0;width:24px;height:24px;background:#EC4899;color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:800}
.observe .o-content{font-size:13.5px;color:#3F2A35;line-height:1.7}
.observe .o-content b{color:#831843;font-weight:700}
.o-label{font-size:11.5px;color:#831843;font-weight:800;letter-spacing:1px;text-transform:uppercase;margin-bottom:4px;display:inline-block}

/* ===== 进度条 / 评分 ===== */
.bar{background:#F0F4FA;border-radius:4px;height:14px;overflow:hidden;position:relative}
.bar .fill{height:100%;background:linear-gradient(90deg,var(--accent),var(--navy));border-radius:4px;transition:width .8s ease}
.bar.orange .fill{background:linear-gradient(90deg,var(--orange),#B45309)}
.bar.green .fill{background:linear-gradient(90deg,var(--green),#047857)}

/* ===== 页脚 ===== */
.foot{background:var(--navy-d);color:#B8C8DC;margin-top:60px;padding:50px 24px 24px}
.foot .inner{max-width:1180px;margin:0 auto;display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:36px}
.foot h4{color:#fff;font-size:14px;font-weight:700;margin-bottom:14px;letter-spacing:1px}
.foot .brand-line{color:#fff;font-weight:800;font-size:18px;margin-bottom:10px;display:flex;align-items:center;gap:8px}
.foot p{font-size:13px;line-height:1.8;opacity:.85}
.foot ul{list-style:none;font-size:13px}
.foot ul li{margin-bottom:8px;opacity:.85}
.foot ul li a{color:#B8C8DC;border-bottom:1px solid rgba(184,200,220,.3)}
.foot ul li a:hover{color:#fff;border-bottom-color:#fff}
.foot .social{display:flex;gap:10px;margin-top:14px;flex-wrap:wrap}
.foot .social a{display:inline-block;padding:6px 14px;background:rgba(255,255,255,.08);border:1px solid rgba(255,255,255,.18);border-radius:6px;font-size:12px;color:#B8C8DC;border-bottom:none}
.foot .social a:hover{background:rgba(255,255,255,.18);color:#fff}
.foot .copyright{border-top:1px solid rgba(255,255,255,.12);margin-top:36px;padding-top:20px;text-align:center;font-size:12px;opacity:.7;grid-column:1/-1}
.foot .copyright span{margin:0 8px}

/* ===== 响应式 ===== */
@media (max-width:980px){
  .grid-4{grid-template-columns:repeat(2,1fr)}
  .grid-3{grid-template-columns:1fr 1fr}
  .foot .inner{grid-template-columns:1fr 1fr}
}
@media (max-width:760px){
  .nav-links{display:none;position:absolute;top:62px;left:0;right:0;background:#fff;flex-direction:column;padding:14px;border-bottom:1px solid var(--line);gap:0;margin-left:0}
  .nav-links.open{display:flex}
  .nav-links a{padding:11px 14px;border-radius:6px}
  .menu-btn{display:block}
  .kpi{grid-template-columns:repeat(2,1fr)}
  .grid-3,.grid-2,.grid-4{grid-template-columns:1fr}
  .foot .inner{grid-template-columns:1fr}
  .hero{padding:50px 20px 44px}
  .sec-title h2{font-size:20px}
}

/* ===== 通用工具 ===== */
.mt8{margin-top:8px}.mt16{margin-top:16px}.mt24{margin-top:24px}.mt32{margin-top:32px}.mt48{margin-top:48px}
.mb16{margin-bottom:16px}.mb24{margin-bottom:24px}
.center{text-align:center}
.muted{color:var(--muted)}
.b{font-weight:700}
.flex{display:flex;gap:10px;align-items:center;flex-wrap:wrap}
.between{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:12px}

/* 项目页：暂未公开的文档标签（非链接） */
.plink{display:inline-block;color:var(--muted);font-size:12.5px;border:1px dashed var(--line);border-radius:6px;padding:3px 10px;margin:0 8px 6px 0;background:var(--bg-d)}