/* ================= 明朝那些事儿 · 共享样式 ================= */
:root{
  --ink:#1c1714;
  --paper:#f5efe2;
  --paper2:#ece3d0;
  --gold:#b8860b;
  --gold-light:#d4a843;
  --red:#9e2b25;
  --red-deep:#7a1f1a;
  --muted:#6b5d4a;
  --line:rgba(120,90,40,.25);
  --shadow:0 10px 40px rgba(40,25,10,.18);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:"Songti SC","SimSun","STSong",Georgia,serif;
  color:var(--ink);background:var(--paper);line-height:1.9;overflow-x:hidden;
}
body::before{
  content:"";position:fixed;inset:0;z-index:-2;
  background:
    radial-gradient(circle at 20% 15%, rgba(184,134,11,.06), transparent 40%),
    radial-gradient(circle at 80% 80%, rgba(158,43,37,.05), transparent 45%),
    var(--paper);
}
body::after{
  content:"";position:fixed;inset:0;z-index:-1;pointer-events:none;opacity:.5;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='120' height='120'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/><feColorMatrix type='saturate' values='0'/></filter><rect width='100%25' height='100%25' filter='url(%23n)' opacity='0.05'/></svg>");
}
a{color:inherit;text-decoration:none}
.container{max-width:1100px;margin:0 auto;padding:0 24px}
.narrow{max-width:820px}

/* ===== NAV ===== */
nav{position:fixed;top:0;left:0;right:0;z-index:100;backdrop-filter:blur(8px);
  background:rgba(245,239,226,.86);border-bottom:1px solid var(--line);transition:.3s}
nav .container{display:flex;align-items:center;justify-content:space-between;height:62px}
.brand{display:flex;align-items:center;gap:10px;font-weight:bold;font-size:1.15rem;letter-spacing:2px}
.brand .seal{width:34px;height:34px;border-radius:6px;background:linear-gradient(135deg,var(--red),var(--red-deep));
  color:#f5efe2;display:grid;place-items:center;font-size:.95rem;box-shadow:0 2px 8px rgba(122,31,26,.4);
  writing-mode:vertical-rl;letter-spacing:0}
.navlinks{display:flex;gap:24px;font-size:.95rem}
.navlinks a{position:relative;color:var(--muted);transition:.2s;padding:4px 0}
.navlinks a:hover,.navlinks a.active{color:var(--red)}
.navlinks a::after{content:"";position:absolute;left:0;bottom:-2px;width:0;height:2px;background:var(--gold);transition:.25s}
.navlinks a:hover::after,.navlinks a.active::after{width:100%}
.menu-toggle{display:none;font-size:1.5rem;cursor:pointer;color:var(--ink);background:none;border:none}

/* ===== PAGE HEADER (inner pages) ===== */
.page-hero{position:relative;padding:140px 0 70px;text-align:center;color:#f5efe2;overflow:hidden}
.page-hero .bg{position:absolute;inset:0;z-index:0}
.page-hero .bg img{width:100%;height:100%;object-fit:cover}
.page-hero .bg::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(20,15,10,.55),rgba(20,15,10,.72))}
.page-hero .inner{position:relative;z-index:2;animation:rise .9s ease both}
.page-hero .crumb{font-size:.85rem;letter-spacing:4px;opacity:.8;margin-bottom:16px}
.page-hero h1{font-size:clamp(2.2rem,6vw,3.6rem);letter-spacing:8px;text-shadow:0 4px 24px rgba(0,0,0,.6)}
.page-hero p{margin-top:16px;font-size:1.05rem;opacity:.9;letter-spacing:2px;max-width:640px;margin-left:auto;margin-right:auto}

/* ===== SECTIONS ===== */
section{padding:80px 0;position:relative}
.sec-head{text-align:center;margin-bottom:50px}
.sec-head .cn{font-size:clamp(1.7rem,4vw,2.5rem);font-weight:bold;letter-spacing:6px;position:relative;display:inline-block;padding-bottom:14px}
.sec-head .cn::after{content:"";position:absolute;left:50%;bottom:0;transform:translateX(-50%);width:60px;height:3px;background:linear-gradient(90deg,transparent,var(--gold),transparent)}
.sec-head .en{display:block;margin-top:10px;color:var(--muted);letter-spacing:5px;font-size:.85rem;text-transform:uppercase}

/* ===== BUTTONS ===== */
.btn{display:inline-block;padding:13px 32px;border-radius:40px;font-size:1rem;letter-spacing:2px;transition:.25s;cursor:pointer;border:1.5px solid transparent;font-family:inherit}
.btn-primary{background:linear-gradient(135deg,var(--gold-light),var(--gold));color:#2b1d05;box-shadow:0 6px 24px rgba(184,134,11,.45)}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 10px 30px rgba(184,134,11,.6)}
.btn-ghost{border-color:rgba(245,239,226,.6);color:#f5efe2}
.btn-ghost:hover{background:rgba(245,239,226,.15);transform:translateY(-3px)}
.btn-outline{border-color:var(--gold);color:var(--red-deep)}
.btn-outline:hover{background:var(--gold);color:#2b1d05;transform:translateY(-3px)}

/* ===== CARDS GRID (parts) ===== */
.parts-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:24px}
.part-card{background:var(--paper2);border:1px solid var(--line);border-radius:16px;padding:26px;box-shadow:var(--shadow);transition:.3s;position:relative;overflow:hidden;display:block}
.part-card:hover{transform:translateY(-6px);border-color:var(--gold);box-shadow:0 16px 44px rgba(40,25,10,.25)}
.part-card .pn{font-size:2.6rem;font-weight:bold;color:var(--gold);opacity:.35;line-height:1;font-family:Georgia,serif}
.part-card h3{font-size:1.25rem;letter-spacing:1px;margin:8px 0 10px;color:var(--red-deep)}
.part-card p{font-size:.93rem;color:#3a3025;line-height:1.75}
.part-card .more{margin-top:14px;color:var(--gold);font-size:.88rem;letter-spacing:1px}

/* ===== INTRO grid ===== */
.intro-grid{display:grid;grid-template-columns:1fr 1fr;gap:50px;align-items:center}
.intro-text p{margin-bottom:18px;color:#332a20;font-size:1.05rem}
.intro-text .lead{font-size:1.25rem;color:var(--red-deep);font-weight:bold;letter-spacing:1px}
.stat-row{display:flex;gap:14px;margin-top:30px;flex-wrap:wrap}
.stat{flex:1;min-width:110px;background:var(--paper2);border:1px solid var(--line);border-radius:14px;padding:18px;text-align:center;box-shadow:var(--shadow)}
.stat .num{font-size:2rem;font-weight:bold;color:var(--gold);display:block}
.stat .lab{font-size:.85rem;color:var(--muted);letter-spacing:1px}
.intro-card{background:var(--paper2);border:1px solid var(--line);border-radius:18px;padding:34px;box-shadow:var(--shadow)}
.intro-card h3{color:var(--red);letter-spacing:2px;margin-bottom:16px;font-size:1.3rem;border-left:4px solid var(--gold);padding-left:12px}
.intro-card ul{list-style:none}
.intro-card li{padding:11px 0;border-bottom:1px dashed var(--line);display:flex;gap:12px;align-items:flex-start}
.intro-card li:last-child{border-bottom:none}
.intro-card li .dot{color:var(--gold);font-weight:bold;flex-shrink:0}

/* ===== TIMELINE ===== */
.timeline-sec{background:linear-gradient(180deg,var(--paper),var(--paper2))}
.timeline{position:relative;max-width:820px;margin:0 auto;padding:20px 0}
.timeline::before{content:"";position:absolute;left:50%;top:0;bottom:0;width:2px;background:linear-gradient(180deg,transparent,var(--gold),var(--gold),transparent);transform:translateX(-50%)}
.tl-item{position:relative;width:50%;padding:18px 40px;opacity:0;transform:translateY(40px);transition:.7s}
.tl-item.show{opacity:1;transform:translateY(0)}
.tl-item:nth-child(odd){left:0;text-align:right}
.tl-item:nth-child(even){left:50%}
.tl-item .node{position:absolute;top:26px;width:18px;height:18px;border-radius:50%;background:var(--paper);border:3px solid var(--gold);box-shadow:0 0 0 4px rgba(184,134,11,.15);z-index:2}
.tl-item:nth-child(odd) .node{right:-9px}
.tl-item:nth-child(even) .node{left:-9px}
.tl-card{background:var(--paper);border:1px solid var(--line);border-radius:14px;padding:20px;box-shadow:var(--shadow);transition:.25s}
.tl-card:hover{transform:translateY(-4px);border-color:var(--gold)}
.tl-year{color:var(--red);font-weight:bold;font-size:1.05rem;letter-spacing:1px}
.tl-title{font-size:1.15rem;font-weight:bold;margin:6px 0 8px}
.tl-desc{font-size:.92rem;color:var(--muted);line-height:1.7}

/* ===== FIGURES ===== */
.fig-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.fig-card{background:var(--paper2);border-radius:18px;overflow:hidden;box-shadow:var(--shadow);border:1px solid var(--line);transition:.3s;position:relative}
.fig-card:hover{transform:translateY(-8px);box-shadow:0 18px 50px rgba(40,25,10,.28)}
.fig-img{height:230px;overflow:hidden;position:relative}
.fig-img img{width:100%;height:100%;object-fit:cover;transition:.6s}
.fig-card:hover .fig-img img{transform:scale(1.08)}
.fig-img::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,transparent 50%,rgba(28,23,20,.55))}
.fig-img .role{position:absolute;left:14px;bottom:12px;z-index:2;color:#f5efe2;font-size:.82rem;letter-spacing:2px;background:rgba(122,31,26,.8);padding:3px 12px;border-radius:20px}
.fig-body{padding:20px}
.fig-body h3{font-size:1.35rem;letter-spacing:2px;margin-bottom:6px}
.fig-body .life{font-size:.82rem;color:var(--muted);margin-bottom:10px;letter-spacing:1px}
.fig-body p{font-size:.93rem;color:#3a3025;line-height:1.75}
.fig-quote{margin-top:14px;padding-top:12px;border-top:1px dashed var(--line);font-style:italic;color:var(--red-deep);font-size:.9rem}

/* ===== QUOTES ===== */
.quotes-sec{background:var(--ink);color:var(--paper)}
.quotes-sec .sec-head .cn{color:var(--gold-light)}
.quotes-sec .sec-head .cn::after{background:linear-gradient(90deg,transparent,var(--gold-light),transparent)}
.quotes-sec .sec-head .en{color:rgba(245,239,226,.5)}
.q-grid{display:grid;grid-template-columns:1fr 1fr;gap:24px}
.q-card{background:rgba(245,239,226,.06);border:1px solid rgba(212,168,67,.25);border-radius:16px;padding:30px;transition:.3s}
.q-card:hover{background:rgba(245,239,226,.1);transform:translateY(-4px)}
.q-card .mark{font-size:2.6rem;color:var(--gold);line-height:.6;font-family:Georgia,serif}
.q-card p{font-size:1.12rem;line-height:2;margin:8px 0 14px}
.q-card .from{color:var(--gold-light);font-size:.85rem;letter-spacing:2px;text-align:right}

/* ===== ARTICLE / CHAPTER body ===== */
.article{background:var(--paper);max-width:780px;margin:0 auto}
.article h2{font-size:1.7rem;letter-spacing:3px;color:var(--red-deep);margin:48px 0 20px;padding-bottom:10px;border-bottom:2px solid var(--line);position:relative}
.article h2::before{content:"❖";color:var(--gold);margin-right:10px;font-size:1.1rem}
.article h3{font-size:1.25rem;letter-spacing:2px;color:var(--ink);margin:32px 0 14px}
.article p{margin-bottom:18px;font-size:1.06rem;color:#2e261c;text-indent:2em}
.article .lead{font-size:1.18rem;color:var(--red-deep);font-weight:bold;text-indent:0;letter-spacing:.5px}
.article blockquote{margin:26px 0;padding:20px 26px;background:var(--paper2);border-left:5px solid var(--gold);border-radius:0 12px 12px 0;font-style:italic;color:#3a2e1c}
.article blockquote p{text-indent:0;margin:0;font-size:1.08rem}
.article .figure{margin:30px 0;text-align:center}
.article .figure img{width:100%;border-radius:14px;box-shadow:var(--shadow)}
.article .figure figcaption{margin-top:10px;font-size:.85rem;color:var(--muted);letter-spacing:1px}
.callout{margin:30px 0;padding:24px 28px;background:linear-gradient(135deg,rgba(184,134,11,.1),rgba(158,43,37,.06));border:1px solid var(--line);border-radius:14px}
.callout h4{color:var(--red);letter-spacing:2px;margin-bottom:10px;font-size:1.1rem}
.callout p{text-indent:0;margin-bottom:8px;font-size:1rem}
.keyfacts{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:14px;margin:26px 0}
.keyfacts .kf{background:var(--paper2);border:1px solid var(--line);border-radius:12px;padding:16px;text-align:center}
.keyfacts .kf .k{font-size:.8rem;color:var(--muted);letter-spacing:1px}
.keyfacts .kf .v{font-size:1.15rem;font-weight:bold;color:var(--red-deep);margin-top:4px}

/* ===== Pager (prev/next) ===== */
.pager{display:flex;justify-content:space-between;gap:16px;max-width:780px;margin:60px auto 0;flex-wrap:wrap}
.pager a{flex:1;min-width:200px;background:var(--paper2);border:1px solid var(--line);border-radius:14px;padding:18px 22px;transition:.25s;box-shadow:var(--shadow)}
.pager a:hover{border-color:var(--gold);transform:translateY(-3px)}
.pager .dir{font-size:.8rem;color:var(--muted);letter-spacing:2px}
.pager .t{font-size:1.05rem;color:var(--red-deep);font-weight:bold;margin-top:4px}
.pager a.next{text-align:right}

/* ===== Concept cards (philosophy) ===== */
.concepts{display:grid;grid-template-columns:repeat(2,1fr);gap:24px}
.concept{background:var(--paper2);border:1px solid var(--line);border-radius:18px;padding:30px;box-shadow:var(--shadow);transition:.3s;position:relative;overflow:hidden}
.concept:hover{transform:translateY(-6px);border-color:var(--gold)}
.concept .badge{display:inline-block;background:var(--red-deep);color:#f5efe2;font-size:.78rem;padding:4px 14px;border-radius:20px;letter-spacing:2px;margin-bottom:14px}
.concept h3{font-size:1.4rem;letter-spacing:3px;color:var(--red-deep);margin-bottom:10px}
.concept .pin{font-size:.82rem;color:var(--muted);margin-bottom:14px;letter-spacing:1px}
.concept p{font-size:.98rem;color:#332a20;line-height:1.85}
.concept .src{margin-top:16px;padding-top:14px;border-top:1px dashed var(--line);font-style:italic;color:var(--gold);font-size:.88rem}

/* Four-line verse */
.verse{max-width:560px;margin:40px auto;text-align:center;background:var(--ink);color:var(--paper);border-radius:18px;padding:44px 30px;box-shadow:var(--shadow);position:relative}
.verse .vt{color:var(--gold-light);letter-spacing:4px;font-size:.9rem;margin-bottom:24px}
.verse p{font-size:1.45rem;letter-spacing:6px;line-height:2.4;text-indent:0;margin:0}
.verse .vf{margin-top:24px;color:rgba(245,239,226,.6);font-size:.85rem;letter-spacing:2px}

/* ===== QUIZ ===== */
.quiz-sec{background:linear-gradient(180deg,var(--paper2),var(--paper))}
.quiz-wrap{max-width:720px;margin:0 auto}
.quiz-card{background:var(--paper);border:1px solid var(--line);border-radius:18px;padding:34px;box-shadow:var(--shadow)}
.quiz-progress{display:flex;justify-content:space-between;align-items:center;margin-bottom:22px;color:var(--muted);font-size:.9rem;letter-spacing:1px}
.quiz-bar{height:6px;background:var(--paper2);border-radius:6px;overflow:hidden;margin-bottom:26px}
.quiz-bar span{display:block;height:100%;background:linear-gradient(90deg,var(--gold-light),var(--gold));width:0;transition:.4s}
.quiz-q{font-size:1.3rem;font-weight:bold;margin-bottom:24px;line-height:1.7}
.quiz-opts{display:flex;flex-direction:column;gap:14px}
.opt{text-align:left;background:var(--paper2);border:1.5px solid var(--line);border-radius:12px;padding:15px 20px;font-size:1.02rem;cursor:pointer;transition:.2s;font-family:inherit;color:var(--ink)}
.opt:hover:not(:disabled){border-color:var(--gold);transform:translateX(6px)}
.opt.correct{background:rgba(122,160,90,.25);border-color:#5e8c3e;color:#3a5a20}
.opt.wrong{background:rgba(158,43,37,.18);border-color:var(--red);color:var(--red-deep)}
.opt:disabled{cursor:default}
.quiz-feedback{margin-top:20px;padding:16px 20px;border-radius:12px;background:var(--paper2);font-size:.95rem;line-height:1.7;display:none;border-left:4px solid var(--gold)}
.quiz-feedback.show{display:block;animation:rise .4s both}
.quiz-next{margin-top:22px;text-align:right}
.quiz-result{text-align:center;display:none}
.quiz-result.show{display:block;animation:rise .5s both}
.quiz-result .score{font-size:4rem;font-weight:bold;color:var(--gold);letter-spacing:2px}
.quiz-result .msg{font-size:1.2rem;margin:10px 0 26px;color:var(--red-deep)}
.quiz-cat{display:inline-block;margin:0 6px 12px;padding:8px 20px;border-radius:30px;border:1.5px solid var(--line);background:var(--paper);cursor:pointer;font-family:inherit;font-size:.95rem;transition:.2s;color:var(--muted)}
.quiz-cat.active,.quiz-cat:hover{border-color:var(--gold);color:var(--red-deep);background:var(--paper2)}

/* ===== FOOTER ===== */
footer{background:var(--ink);color:rgba(245,239,226,.7);padding:60px 0 30px}
.foot-grid{display:grid;grid-template-columns:2fr 1fr 1fr;gap:40px;margin-bottom:40px}
footer h4{color:var(--gold-light);letter-spacing:3px;margin-bottom:16px;font-size:1.1rem}
footer p{font-size:.92rem;line-height:1.9;margin-bottom:8px}
footer ul{list-style:none}
footer li{padding:6px 0;font-size:.92rem;transition:.2s}
footer li a:hover{color:var(--gold-light)}
.foot-bottom{border-top:1px solid rgba(245,239,226,.15);padding-top:24px;text-align:center;font-size:.85rem;color:rgba(245,239,226,.45);letter-spacing:1px}

/* ===== utility ===== */
.reveal{opacity:0;transform:translateY(40px);transition:.8s}
.reveal.show{opacity:1;transform:translateY(0)}
.totop{position:fixed;right:24px;bottom:24px;width:48px;height:48px;border-radius:50%;background:linear-gradient(135deg,var(--gold-light),var(--gold));color:#2b1d05;display:grid;place-items:center;font-size:1.3rem;cursor:pointer;box-shadow:0 6px 20px rgba(184,134,11,.45);opacity:0;pointer-events:none;transition:.3s;z-index:90;border:none}
.totop.show{opacity:1;pointer-events:auto}
.totop:hover{transform:translateY(-4px)}
@keyframes rise{from{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}

/* ===== HOME hero ===== */
header.hero{position:relative;min-height:100vh;display:flex;align-items:center;justify-content:center;text-align:center;color:#f5efe2;overflow:hidden}
.hero-bg{position:absolute;inset:0;z-index:0}
.hero-bg img{width:100%;height:100%;object-fit:cover;filter:saturate(1.05)}
.hero-bg::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(20,15,10,.45),rgba(20,15,10,.25) 40%,rgba(20,15,10,.7))}
.hero-content{position:relative;z-index:2;padding:0 24px;animation:rise 1.2s ease both}
.hero-content .tag{font-size:.95rem;letter-spacing:8px;opacity:.85;margin-bottom:18px}
.hero-content h1{font-size:clamp(3rem,9vw,6.5rem);font-weight:bold;letter-spacing:10px;text-shadow:0 4px 30px rgba(0,0,0,.6);margin-bottom:8px}
.hero-content .sub{font-size:clamp(1rem,2.5vw,1.4rem);letter-spacing:4px;opacity:.92;margin-bottom:30px}
.hero-content .quote{max-width:640px;margin:0 auto 38px;font-size:1.05rem;opacity:.88;font-style:italic;line-height:2}
.hero-btns{display:flex;gap:16px;justify-content:center;flex-wrap:wrap}
.scroll-hint{position:absolute;bottom:26px;left:50%;transform:translateX(-50%);z-index:2;color:#f5efe2;opacity:.7;font-size:.85rem;letter-spacing:3px;animation:bob 2s infinite}
@keyframes bob{0%,100%{transform:translateX(-50%) translateY(0)}50%{transform:translateX(-50%) translateY(8px)}}

/* ===== RESPONSIVE ===== */
@media(max-width:860px){
  .navlinks{position:fixed;top:62px;right:0;flex-direction:column;background:rgba(245,239,226,.98);width:210px;padding:14px 20px;gap:0;box-shadow:var(--shadow);transform:translateX(110%);transition:.3s;border-left:1px solid var(--line)}
  .navlinks.open{transform:translateX(0)}
  .navlinks a{padding:12px 0;border-bottom:1px solid var(--line)}
  .menu-toggle{display:block}
  .intro-grid{grid-template-columns:1fr;gap:34px}
  .parts-grid,.fig-grid{grid-template-columns:1fr 1fr}
  .q-grid,.concepts{grid-template-columns:1fr}
  .foot-grid{grid-template-columns:1fr}
  .timeline::before{left:18px}
  .tl-item{width:100%;left:0!important;text-align:left!important;padding:14px 0 14px 48px}
  .tl-item .node{left:9px!important;right:auto!important}
}
@media(max-width:520px){
  .parts-grid,.fig-grid{grid-template-columns:1fr}
  .verse p{font-size:1.2rem;letter-spacing:3px}
}