/* ============================================================
   三国演义解读 · 单页主题样式（仿古卷轴 · 朱砂金墨）v3
   新增：图谱工具栏样式
   ============================================================ */
:root{
  --ink:#26231d;
  --ink2:#4a453a;
  --paper:#f4eddd;
  --paper2:#eee3cb;
  --seal:#9e2b25;
  --gold:#a8862d;
  --green:#2f7d4f;
  --blue:#3f6fa5;
  --red:#b03a2e;
  --line:#d9cba6;
  --shadow:0 3px 18px rgba(60,45,20,.14);
  --serif:"STKaiti","KaiTi","STSong","SimSun","Noto Serif SC",serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:var(--serif);
  color:var(--ink);
  background-color:var(--paper);
  background-image:radial-gradient(rgba(150,120,70,.07) 1px,transparent 1px);
  background-size:20px 20px;
  line-height:1.8;
}
a{color:inherit;text-decoration:none}
img{max-width:100%}

/* ---------- 顶部导航 ---------- */
.topnav{
  position:fixed;top:0;left:0;right:0;z-index:99;
  background:rgba(30,27,22,.92);
  box-shadow:0 2px 12px rgba(0,0,0,.35);
}
.tn-in{
  max-width:1180px;margin:0 auto;
  display:flex;align-items:center;justify-content:space-between;
  padding:10px 20px;
}
.tn-logo{
  display:flex;align-items:center;gap:10px;
  color:#f2e8cf;font-size:18px;letter-spacing:2px;
}
.tn-logo .seal{
  display:inline-flex;align-items:center;justify-content:center;
  width:34px;height:34px;border-radius:6px;
  background:var(--seal);color:#f7ecd2;
  font-size:15px;line-height:1.1;text-align:center;
  box-shadow:inset 0 0 0 1.5px rgba(247,236,210,.5);
}
.tn-links{display:flex;gap:6px;flex-wrap:wrap}
.tn-links a{
  color:#d8cdb2;font-size:15px;padding:6px 12px;border-radius:4px;
  border:1px solid transparent;transition:all .2s;
}
.tn-links a:hover{color:#fff}
.tn-links a.on{
  color:#f7ecd2;border-color:rgba(247,236,210,.4);
  background:rgba(158,43,37,.35);
}

/* ---------- 首屏 ---------- */
.hero{
  min-height:100vh;position:relative;
  display:flex;align-items:center;justify-content:center;
  background:
    linear-gradient(rgba(24,20,15,.55),rgba(24,20,15,.82)),
    repeating-linear-gradient(115deg,#2b2620 0 3px,#332d25 3px 6px);
  color:#f2e8cf;
}
.hero-in{text-align:center;padding:110px 20px 60px;max-width:860px}
.hero-frame{
  border:2px solid rgba(242,232,207,.35);
  outline:1px solid rgba(242,232,207,.15);
  outline-offset:6px;
  padding:46px 30px 40px;
  background:rgba(0,0,0,.18);
}
.hero-kicker{
  font-size:14px;letter-spacing:8px;color:#cdbf9d;margin-bottom:18px;
}
.hero-frame h1{
  font-size:64px;letter-spacing:18px;text-indent:18px;
  color:#f7ecd2;font-weight:700;
  text-shadow:0 4px 18px rgba(0,0,0,.6);
}
.hero-sub{
  margin-top:10px;font-size:17px;letter-spacing:6px;color:#e6d7b4;
}
.hero-poem{
  margin-top:30px;padding-top:24px;
  border-top:1px dashed rgba(242,232,207,.35);
  font-size:16px;color:#e9dec2;line-height:2.2;
}
.hero-poem p{margin:2px 0}
.poem-src{
  display:block;margin-top:12px;font-size:13px;color:#b3a583;letter-spacing:2px;
}
/* 名言轮播 */
#hero-quotes{
  margin-top:26px;height:34px;position:relative;
  border-top:1px dashed rgba(242,232,207,.25);padding-top:16px;
}
.hq-item{
  display:none;position:absolute;left:0;right:0;top:16px;
  font-size:15px;letter-spacing:2px;color:#d8cdb2;
  animation:hqin .6s ease both;
}
.hq-item.on{display:block}
@keyframes hqin{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:translateY(0)}}
.hero-down{
  display:inline-block;margin-top:30px;
  color:#d8cdb2;font-size:14px;letter-spacing:3px;
  animation:bob 1.8s ease-in-out infinite;
}
@keyframes bob{0%,100%{transform:translateY(0)}50%{transform:translateY(6px)}}

/* ---------- 通用版式 ---------- */
.sec{padding:84px 0 70px}
.sec-dark{
  background:#221f19;color:#e9dec2;
  background-image:radial-gradient(rgba(230,215,180,.05) 1px,transparent 1px);
  background-size:20px 20px;
}
.wrap{max-width:1180px;margin:0 auto;padding:0 20px}
.sec-head{margin-bottom:44px;text-align:center}
.sec-no{
  display:inline-flex;align-items:center;justify-content:center;
  width:52px;height:52px;border-radius:50%;
  background:var(--seal);color:#f7ecd2;font-size:22px;
  box-shadow:0 0 0 3px rgba(158,43,37,.2),inset 0 0 0 2px rgba(247,236,210,.4);
  margin-bottom:14px;
}
.sec-dark .sec-no{box-shadow:0 0 0 3px rgba(158,43,37,.45),inset 0 0 0 2px rgba(247,236,210,.5)}
.sec-head h2{
  font-size:34px;letter-spacing:14px;text-indent:14px;color:var(--ink);
}
.sec-dark .sec-head h2{color:#f2e8cf}
.sec-head p{margin-top:6px;color:#8b8064;letter-spacing:3px;font-size:15px}
.sec-dark .sec-head p{color:#a2967a}
.sec-head::after{
  content:"";display:block;width:64px;height:3px;margin:16px auto 0;
  background:linear-gradient(90deg,transparent,var(--gold),transparent);
}

/* ---------- 摘要 ---------- */
.sum-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.sum-card{
  background:#fbf6ea;border:1px solid var(--line);border-radius:10px;
  box-shadow:var(--shadow);padding:26px 28px;position:relative;overflow:hidden;
}
.sum-card::before{
  content:"";position:absolute;top:0;left:0;right:0;height:4px;
  background:linear-gradient(90deg,var(--seal),var(--gold));
}
.sum-card h3{
  font-size:22px;letter-spacing:3px;margin-bottom:14px;color:var(--ink);
  display:flex;align-items:center;gap:10px;
}
.sum-card h3::before{
  content:"§";color:var(--seal);font-size:18px;
}
.sum-card .sum-brief{color:var(--ink2);font-size:15.5px}
.sum-block{
  margin-top:16px;padding:14px 16px;border-radius:8px;
  background:var(--paper2);border:1px dashed var(--line);
  font-size:14.5px;color:var(--ink2);
}
.sum-block .blk-t{
  display:inline-block;font-size:13px;color:#fff;background:var(--gold);
  border-radius:3px;padding:1px 8px;margin-bottom:8px;letter-spacing:2px;
}
.sum-card ul{list-style:none;margin-top:8px}
.sum-card ul li{
  position:relative;padding-left:20px;margin:6px 0;font-size:15px;color:var(--ink2);
}
.sum-card ul li::before{
  content:"";position:absolute;left:2px;top:.85em;
  width:8px;height:8px;transform:rotate(45deg);
  background:var(--gold);
}
.sum-card ul.zh li::before{background:var(--seal)}

/* ---------- 背景 ---------- */
.bg-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.bg-card{
  border:1px solid rgba(233,222,194,.22);border-radius:10px;
  background:rgba(255,255,255,.04);
  padding:26px 28px;position:relative;
}
.bg-card h3{
  font-size:20px;letter-spacing:4px;color:#f2e8cf;margin-bottom:12px;
  display:flex;align-items:center;gap:10px;
}
.bg-card h3 .ico{
  display:inline-flex;align-items:center;justify-content:center;
  width:28px;height:28px;border-radius:4px;
  background:rgba(168,134,45,.25);border:1px solid rgba(168,134,45,.5);
  color:#e6d7b4;font-size:15px;flex:none;
}
.bg-card p{font-size:15px;color:#cfc4a6}

/* ---------- 知识图谱 ---------- */
.graph-wrap{
  display:grid;grid-template-columns:340px 1fr;gap:24px;align-items:stretch;
}
.gn-detail{
  background:#fbf6ea;border:1px solid var(--line);border-radius:10px;
  box-shadow:var(--shadow);padding:24px;min-height:420px;
}
.gn-detail .empty{color:#9a8f74;text-align:center;padding-top:120px;font-size:14px;letter-spacing:2px}
.gn-detail h3{font-size:24px;letter-spacing:2px;margin-bottom:6px}
.gn-badges{display:flex;gap:8px;flex-wrap:wrap;margin:10px 0 14px}
.gn-badges span{
  font-size:12.5px;padding:2px 10px;border-radius:20px;
  background:var(--paper2);border:1px solid var(--line);color:var(--ink2);
}
.gn-badges span.b-type{background:var(--seal);border-color:var(--seal);color:#f7ecd2}
.gn-detail .gn-sum{font-size:15px;color:var(--ink2)}
.gn-rel{margin-top:18px}
.gn-rel h4{font-size:15px;letter-spacing:3px;color:var(--ink);margin-bottom:10px}
.gn-rel h4::after{content:"";display:block;width:36px;height:2px;background:var(--gold);margin-top:6px}
.gn-chips{display:flex;flex-wrap:wrap;gap:8px}
.gn-chips a{
  font-size:13px;padding:4px 12px;border-radius:20px;cursor:pointer;
  background:#fff;border:1px solid var(--line);color:var(--ink2);
  transition:all .15s;
}
.gn-chips a:hover{border-color:var(--seal);color:var(--seal)}
.gn-chips a b{color:var(--gold);font-weight:400;margin-left:4px;font-size:12px}
.graph-stage{
  position:relative;border-radius:10px;overflow:hidden;
  border:1px solid var(--line);box-shadow:var(--shadow);
  background:
    radial-gradient(ellipse at center,rgba(255,250,238,.9),rgba(238,227,203,.95)),
    repeating-linear-gradient(0deg,transparent 0 27px,rgba(150,120,70,.08) 27px 28px),
    repeating-linear-gradient(90deg,transparent 0 27px,rgba(150,120,70,.08) 27px 28px);
  min-height:520px;
}
#graph-canvas{display:block;width:100%;height:520px;cursor:grab;touch-action:none}
/* 图谱工具栏 */
.graph-tools{
  position:absolute;top:12px;left:14px;z-index:3;
  display:flex;gap:8px;
}
.graph-tools button{
  cursor:pointer;font-family:var(--serif);
  font-size:13px;letter-spacing:2px;line-height:1.6;
  padding:6px 13px;border-radius:8px;
  background:rgba(251,246,234,.92);border:1px solid var(--line);color:var(--ink2);
  box-shadow:0 2px 8px rgba(60,45,20,.12);
  transition:all .15s;
}
.graph-tools button:hover{border-color:var(--seal);color:var(--seal)}
.graph-tools button:active{transform:translateY(1px)}
.graph-legend{
  position:absolute;left:14px;bottom:12px;
  display:flex;gap:10px;flex-wrap:wrap;
  background:rgba(251,246,234,.9);border:1px solid var(--line);border-radius:8px;
  padding:8px 12px;pointer-events:none;
}
.graph-legend span{
  font-size:12.5px;color:var(--ink2);display:flex;align-items:center;gap:6px;
}
.graph-legend span i{width:10px;height:10px;border-radius:50%;display:inline-block}
.graph-tip{
  position:absolute;top:12px;right:14px;font-size:12.5px;color:#8b8064;
  background:rgba(251,246,234,.9);border:1px solid var(--line);
  border-radius:8px;padding:6px 12px;letter-spacing:1px;pointer-events:none;
}
.graph-tip b{color:var(--seal)}

/* ---------- 人物 ---------- */
.figure-filter{display:flex;gap:10px;flex-wrap:wrap;justify-content:center;margin-bottom:34px}
.figure-filter a{
  cursor:pointer;font-size:15px;letter-spacing:2px;
  padding:7px 22px;border-radius:30px;
  border:1px solid rgba(233,222,194,.3);color:#d8cdb2;
  transition:all .2s;
}
.figure-filter a:hover{color:#fff;border-color:#f2e8cf}
.figure-filter a.on{background:var(--seal);border-color:var(--seal);color:#f7ecd2}
.figure-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.f-card{
  background:#fbf6ea;color:var(--ink);border-radius:10px;
  border:1px solid rgba(233,222,194,.25);
  box-shadow:var(--shadow);padding:24px;position:relative;overflow:hidden;
}
.f-card::after{
  content:attr(data-f);
  position:absolute;right:-6px;top:-14px;
  font-size:96px;font-weight:700;color:rgba(150,120,70,.08);
  line-height:1;pointer-events:none;
}
.f-head{display:flex;align-items:baseline;gap:10px;flex-wrap:wrap}
.f-head .nm{font-size:26px;letter-spacing:2px;font-weight:700}
.f-head .cy{font-size:14px;color:#8b8064}
.f-badge{
  font-size:12.5px;color:#f7ecd2;padding:2px 10px;border-radius:3px;letter-spacing:2px;
}
.f-title{margin-top:6px;font-size:14px;color:var(--seal);letter-spacing:1px}
.f-birth{font-size:13px;color:#8b8064;margin-top:2px}
.f-tags{display:flex;flex-wrap:wrap;gap:6px;margin-top:12px}
.f-tags span{
  font-size:12.5px;background:var(--paper2);border:1px solid var(--line);
  border-radius:20px;padding:2px 10px;color:var(--ink2);
}
.f-sum{margin-top:14px;font-size:14.5px;color:var(--ink2)}
.f-story{margin-top:12px;border-top:1px dashed var(--line);padding-top:12px}
.f-story li{
  list-style:none;position:relative;padding-left:18px;
  font-size:13.8px;color:var(--ink2);margin:5px 0;
}
.f-story li::before{content:"·";position:absolute;left:4px;color:var(--gold);font-weight:700}
.f-quote{
  margin-top:14px;padding:10px 14px;border-left:3px solid var(--seal);
  background:var(--paper2);font-size:14px;color:var(--ink2);
  font-style:italic;border-radius:0 6px 6px 0;
}
.f-stats{margin-top:16px;display:grid;gap:8px}
.fbar{display:grid;grid-template-columns:52px 1fr 34px;align-items:center;gap:10px;font-size:12.5px}
.fbar span{color:#8b8064;letter-spacing:2px}
.fbar b{color:var(--ink);text-align:right;font-size:13px}
.fb-track{height:8px;background:var(--paper2);border-radius:4px;overflow:hidden;border:1px solid var(--line)}
.fb-track i{display:block;height:100%;border-radius:4px;background:linear-gradient(90deg,var(--gold),var(--seal))}

/* ---------- 事件时间轴 ---------- */
.tl{position:relative;padding-left:26px;max-width:980px;margin:0 auto}
.tl::before{
  content:"";position:absolute;left:8px;top:6px;bottom:6px;width:2px;
  background:linear-gradient(var(--gold),var(--seal));
}
.evt{position:relative;margin-bottom:34px}
.evt::before{
  content:"";position:absolute;left:-25px;top:18px;
  width:14px;height:14px;border-radius:50%;
  background:var(--paper);border:3px solid var(--seal);
}
.evt-card{
  background:#fbf6ea;border:1px solid var(--line);border-radius:10px;
  box-shadow:var(--shadow);padding:22px 26px;
}
.evt-top{display:flex;align-items:baseline;gap:14px;flex-wrap:wrap}
.evt-year{
  font-size:26px;font-weight:700;color:var(--seal);letter-spacing:1px;
  font-family:Georgia,var(--serif);
}
.evt-name{font-size:21px;letter-spacing:2px;font-weight:700}
.evt-period{
  font-size:12.5px;color:#fff;background:var(--gold);
  padding:2px 10px;border-radius:3px;letter-spacing:2px;
}
.evt-meta{margin-top:4px;font-size:13.5px;color:#8b8064}
.evt-meta b{color:var(--ink2);font-weight:400}
.evt-sum{margin-top:10px;font-size:15px;color:var(--ink2)}
.evt-detail{margin:12px 0 4px;padding:14px 16px;background:var(--paper2);border-radius:8px;counter-reset:ev}
.evt-detail li{
  list-style:none;position:relative;padding-left:20px;
  font-size:14px;color:var(--ink2);margin:5px 0;
}
.evt-detail li::before{
  content:counter(ev,cjk-ideographic) "、";counter-increment:ev;
  position:absolute;left:0;color:var(--seal);font-size:12.5px;
}
.evt-impact{display:flex;flex-wrap:wrap;gap:8px;margin-top:12px}
.evt-impact span{
  font-size:13px;color:var(--green);background:rgba(47,125,79,.08);
  border:1px solid rgba(47,125,79,.3);border-radius:4px;padding:3px 10px;
}

/* ---------- 页脚 ---------- */
footer{
  background:#181510;color:#a2967a;
  padding:34px 20px;text-align:center;font-size:14px;letter-spacing:1px;
}
footer a{color:#d8cdb2;border-bottom:1px dotted #6b6250}
footer .ft-poem{color:#6b6250;font-size:13px;margin-bottom:10px}

/* ---------- 回到顶部 ---------- */
#btt{
  position:fixed;right:26px;bottom:30px;z-index:98;
  width:44px;height:44px;border-radius:50%;
  background:var(--seal);color:#f7ecd2;font-size:15px;border:none;cursor:pointer;
  box-shadow:0 4px 14px rgba(158,43,37,.45);opacity:0;pointer-events:none;
  transition:opacity .25s;
}
#btt.show{opacity:1;pointer-events:auto}
#btt:hover{filter:brightness(1.1)}

/* ---------- 加载层 ---------- */
#loading{
  position:fixed;inset:0;z-index:200;
  background:#1e1b16;color:#d8cdb2;
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:18px;
  font-size:16px;letter-spacing:4px;
}
#loading .ld-ring{
  width:46px;height:46px;border-radius:50%;
  border:3px solid rgba(216,205,178,.2);border-top-color:var(--gold);
  animation:spin 1s linear infinite;
}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---------- 响应式 ---------- */
@media (max-width:960px){
  .sum-grid,.bg-grid,.graph-wrap{grid-template-columns:1fr}
  .figure-grid{grid-template-columns:repeat(2,1fr)}
  .hero-frame h1{font-size:44px;letter-spacing:10px;text-indent:10px}
  .tn-links{display:none}
}
@media (max-width:600px){
  .figure-grid{grid-template-columns:1fr}
  .sec{padding:60px 0 50px}
  .sec-head h2{font-size:26px;letter-spacing:8px;text-indent:8px}
}