/* ============================================================
   日本史物语 · 和风学习站样式
   配色取自日本传统色：朱色 #EB6101 / 紺青 #223A70 / 金 #C9A447
   抹茶 #7B9E56 / 墨 #2B2B28 / 和纸 #F7F2E7
   ============================================================ */
:root{
  --shu:#EB6101;        /* 朱色 */
  --shu-deep:#C0392B;
  --kon:#223A70;        /* 紺青 */
  --kon-deep:#16264B;
  --kin:#C9A447;        /* 金 */
  --matcha:#7B9E56;     /* 抹茶 */
  --sora:#7BA3B8;
  --ink:#2B2B28;
  --ink-soft:#5a564c;
  --paper:#F7F2E7;
  --paper-2:#FDF9F0;
  --line:#E4DBC6;
  --card:#FFFDF6;
  --red-seal:#C0392B;
  --shadow:0 2px 10px rgba(43,43,40,.08), 0 8px 28px rgba(43,43,40,.06);
  --serif:"Noto Serif SC","Noto Serif JP","Yu Mincho","Hiragino Mincho ProN","SimSun",serif;
  --sans:"Noto Sans SC","Yu Gothic","Hiragino Kaku Gothic ProN","Microsoft YaHei",sans-serif;
  --radius:14px;
}
*{box-sizing:border-box;margin:0;padding:0}
body{
  font-family:var(--sans);
  color:var(--ink);
  background-color:var(--paper);
  background-image:
    radial-gradient(circle at 15% 20%, rgba(201,164,71,.05) 0 140px, transparent 200px),
    radial-gradient(circle at 85% 70%, rgba(34,58,112,.045) 0 160px, transparent 220px),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='240' height='240'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2'/%3E%3CfeColorMatrix values='0 0 0 0 .45 0 0 0 0 .4 0 0 0 0 .3 0 0 0 .05 0'/%3E%3C/filter%3E%3Crect width='240' height='240' filter='url(%23n)'/%3E%3C/svg%3E");
  line-height:1.75;
  min-height:100vh;
  display:flex;flex-direction:column;
}
img{max-width:100%;display:block}
a{color:var(--kon);text-decoration:none}
a:hover{color:var(--shu)}
main#app{flex:1;width:100%;max-width:1160px;margin:0 auto;padding:0 20px 60px}
h1,h2,h3,h4{font-family:var(--serif);color:var(--ink);line-height:1.4}
button{font-family:var(--sans);cursor:pointer}
.hidden{display:none!important}

/* ---------- 樱花瓣 ---------- */
#petals{position:fixed;inset:0;pointer-events:none;z-index:5;overflow:hidden}
.petal{
  position:absolute;top:-40px;width:14px;height:12px;opacity:.75;
  background:linear-gradient(135deg,#FADCE8,#F4A7C0);
  border-radius:80% 0 80% 0;
  animation:petal-fall linear infinite;
}
@keyframes petal-fall{
  0%{transform:translate(0,-5vh) rotate(0deg)}
  25%{transform:translate(4vw,22vh) rotate(95deg)}
  50%{transform:translate(-3vw,48vh) rotate(190deg)}
  75%{transform:translate(5vw,74vh) rotate(280deg)}
  100%{transform:translate(-2vw,105vh) rotate(380deg)}
}

/* ---------- 顶栏 ---------- */
.site-header{
  position:sticky;top:0;z-index:50;
  display:flex;align-items:center;gap:18px;
  padding:10px 22px;
  background:rgba(253,249,240,.92);
  backdrop-filter:blur(8px);
  border-bottom:3px double var(--line);
}
.brand{display:flex;align-items:center;gap:10px;color:var(--ink)}
.brand-seal{
  width:42px;height:42px;border-radius:9px;flex:none;
  background:var(--red-seal);color:#fff;
  font-family:var(--serif);font-size:24px;font-weight:900;
  display:grid;place-items:center;
  box-shadow:inset 0 0 0 2px rgba(255,255,255,.35);
  transform:rotate(-4deg);
}
.brand-name{font-family:var(--serif);font-weight:900;font-size:19px;display:flex;flex-direction:column;line-height:1.2}
.brand-name small{font-size:10px;color:var(--ink-soft);letter-spacing:2px;font-weight:400}
.site-nav{display:flex;gap:2px;margin-left:auto;flex-wrap:wrap}
.site-nav a{
  padding:7px 13px;border-radius:8px;font-size:14.5px;color:var(--ink-soft);
  position:relative;white-space:nowrap;
}
.site-nav a:hover{background:rgba(235,97,1,.08);color:var(--shu)}
.site-nav a.active{color:var(--shu);font-weight:700}
.site-nav a.active::after{
  content:"";position:absolute;left:13px;right:13px;bottom:3px;height:3px;
  background:var(--shu);border-radius:3px;
}
.header-progress{
  display:flex;align-items:center;gap:8px;font-size:13px;color:var(--ink-soft);
  padding:5px 12px;border:1.5px solid var(--line);border-radius:99px;background:var(--card);
  white-space:nowrap;
}
.header-progress b{color:var(--shu);font-family:var(--serif)}
.header-progress .seal-mini{
  width:22px;height:22px;border-radius:50%;background:var(--red-seal);color:#fff;
  display:grid;place-items:center;font-size:11px;font-family:var(--serif);
}
.nav-toggle{display:none;background:none;border:1.5px solid var(--line);border-radius:8px;font-size:20px;padding:4px 10px;color:var(--ink)}

/* ---------- 首页 hero ---------- */
.hero{
  position:relative;border-radius:0 0 26px 26px;overflow:hidden;
  margin:0 -20px 34px;min-height:430px;
  display:flex;align-items:flex-end;
  background:var(--kon-deep);
}
.hero-bg{position:absolute;inset:0}
.hero-bg img{width:100%;height:100%;object-fit:cover;opacity:.55}
.hero-bg::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(22,38,75,.25),rgba(22,38,75,.82))}
.hero-inner{position:relative;padding:56px 44px 44px;color:#fff;max-width:760px}
.hero-tag{
  display:inline-flex;align-items:center;gap:8px;font-size:13px;letter-spacing:3px;
  border:1px solid rgba(255,255,255,.5);padding:5px 14px;border-radius:99px;margin-bottom:18px;
}
.hero h1{font-size:clamp(30px,5vw,50px);color:#fff;font-weight:900;letter-spacing:2px}
.hero h1 em{font-style:normal;color:#F5C86B}
.hero p.sub{margin:14px 0 26px;font-size:16.5px;color:rgba(255,255,255,.88);max-width:56ch}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap}
.btn{
  display:inline-flex;align-items:center;gap:8px;border-radius:99px;
  padding:12px 26px;font-size:15.5px;font-weight:700;border:none;transition:.2s;
}
.btn-primary{background:var(--shu);color:#fff;box-shadow:0 6px 18px rgba(235,97,1,.35)}
.btn-primary:hover{transform:translateY(-2px);color:#fff;box-shadow:0 10px 24px rgba(235,97,1,.45)}
.btn-ghost{background:rgba(255,255,255,.14);color:#fff;border:1px solid rgba(255,255,255,.55)}
.btn-ghost:hover{background:rgba(255,255,255,.25);color:#fff}
.btn-outline{background:var(--card);color:var(--kon);border:1.5px solid var(--line)}
.btn-outline:hover{border-color:var(--shu);color:var(--shu)}
.btn:disabled{opacity:.45;cursor:not-allowed;transform:none}

/* ---------- 仪表盘 ---------- */
.dashboard{display:grid;grid-template-columns:340px 1fr;gap:18px;margin-bottom:38px}
.dash-card{
  background:var(--card);border:1.5px solid var(--line);border-radius:var(--radius);
  padding:24px;box-shadow:var(--shadow);
}
.dash-ring{display:flex;gap:22px;align-items:center}
.ring-wrap{position:relative;width:132px;height:132px;flex:none}
.ring-wrap svg{transform:rotate(-90deg)}
.ring-bg{fill:none;stroke:var(--line);stroke-width:11}
.ring-fg{fill:none;stroke:var(--shu);stroke-width:11;stroke-linecap:round;transition:stroke-dashoffset .8s ease}
.ring-label{position:absolute;inset:0;display:grid;place-items:center;text-align:center}
.ring-label b{font-size:26px;font-family:var(--serif);color:var(--shu)}
.ring-label span{font-size:11px;color:var(--ink-soft)}
.dash-stats{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}
.stat{background:var(--paper-2);border:1.5px solid var(--line);border-radius:12px;padding:13px 15px}
.stat b{display:block;font-size:22px;font-family:var(--serif);color:var(--kon)}
.stat span{font-size:12.5px;color:var(--ink-soft)}
.dash-actions{margin-top:14px;display:flex;gap:10px;flex-wrap:wrap}
.dash-note{font-size:12.5px;color:var(--ink-soft);margin-top:12px}

/* ---------- 章节导航（首页时间轴） ---------- */
.section-title{display:flex;align-items:center;gap:14px;margin:8px 0 20px}
.section-title::after{content:"";flex:1;height:1.5px;background:linear-gradient(90deg,var(--line),transparent)}
.section-title h2{font-size:24px}
.section-title .en{font-size:12px;color:var(--ink-soft);letter-spacing:2px}
.era-nav{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}
.era-card{
  position:relative;border-radius:var(--radius);overflow:hidden;min-height:190px;
  background:var(--kon);color:#fff;padding:18px 16px 16px;
  display:flex;flex-direction:column;transition:.25s;box-shadow:var(--shadow);
  border:1.5px solid rgba(0,0,0,.06);
}
.era-card:hover{transform:translateY(-5px) rotate(-.4deg);box-shadow:0 14px 30px rgba(34,58,112,.25)}
.era-card::before{
  content:"";position:absolute;inset:0;opacity:.16;
  background:radial-gradient(circle at 80% -10%, #fff 0 60px, transparent 120px);
}
.era-card .no{font-family:var(--serif);font-size:12px;letter-spacing:2px;opacity:.85}
.era-card .nm{font-family:var(--serif);font-size:19.5px;font-weight:900;margin-top:4px}
.era-card .yr{font-size:11.5px;opacity:.85;margin-top:2px}
.era-card .kw{font-size:12px;margin-top:auto;opacity:.92;display:flex;gap:6px;flex-wrap:wrap}
.era-card .kw i{font-style:normal;background:rgba(255,255,255,.18);padding:2px 8px;border-radius:99px}
.era-card .era-check{
  position:absolute;top:10px;right:10px;width:26px;height:26px;border-radius:50%;
  background:rgba(255,255,255,.92);color:var(--shu);display:grid;place-items:center;font-size:14px;font-weight:900;
}

/* ---------- 通用页面头 ---------- */
.page-head{margin:34px 0 24px}
.page-head h1{font-size:30px;display:flex;align-items:center;gap:12px}
.page-head .lead{color:var(--ink-soft);margin-top:6px;max-width:72ch}
.page-head .brush{width:52px;height:6px;border-radius:4px;background:linear-gradient(90deg,var(--shu),var(--kin))}

/* ---------- 时代详情页 ---------- */
.era-hero{
  position:relative;border-radius:var(--radius);overflow:hidden;margin-top:26px;
  min-height:250px;display:flex;align-items:center;color:#fff;box-shadow:var(--shadow);
}
.era-hero .bg{position:absolute;inset:0}
.era-hero .tint{position:absolute;inset:0}
.era-hero .bg img{width:100%;height:100%;object-fit:cover;opacity:.42}
.era-hero .bg::after{content:"";position:absolute;inset:0;background:linear-gradient(100deg,rgba(22,38,75,.85) 8%,rgba(22,38,75,.35) 70%,rgba(22,38,75,.55))}
.era-hero-inner{position:relative;display:flex;gap:26px;align-items:center;padding:34px 38px;width:100%}
.era-vertical{
  writing-mode:vertical-rl;font-family:var(--serif);font-size:clamp(30px,4vw,44px);font-weight:900;
  letter-spacing:10px;text-shadow:0 2px 12px rgba(0,0,0,.4);border-right:3px solid var(--kin);
  padding-right:16px;max-height:220px;
}
.era-hero-meta{flex:1;min-width:0}
.era-hero-meta .period{font-size:15px;color:#F5C86B;font-family:var(--serif);letter-spacing:1px}
.era-hero-meta .desc{margin:10px 0 14px;color:rgba(255,255,255,.9);max-width:66ch;font-size:15px}
.kw-chips{display:flex;gap:8px;flex-wrap:wrap}
.kw-chips i{font-style:normal;font-size:13px;background:rgba(255,255,255,.16);border:1px solid rgba(255,255,255,.35);padding:4px 12px;border-radius:99px}
.era-read-toggle{margin-top:16px}

.era-tabs{display:flex;gap:6px;margin:26px 0 20px;border-bottom:2px solid var(--line);overflow-x:auto;padding-bottom:0}
.era-tabs button{
  background:none;border:none;padding:10px 16px;font-size:15px;color:var(--ink-soft);
  border-bottom:3px solid transparent;margin-bottom:-2px;white-space:nowrap;font-weight:500;
}
.era-tabs button.active{color:var(--shu);font-weight:800;border-color:var(--shu)}
.era-panel{animation:fadein .35s ease}
@keyframes fadein{from{opacity:0;transform:translateY(8px)}to{opacity:1;transform:none}}

/* 人物卡 */
.people-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(255px,1fr));gap:16px}
.person-card{
  background:var(--card);border:1.5px solid var(--line);border-radius:var(--radius);
  overflow:hidden;box-shadow:var(--shadow);transition:.25s;display:flex;flex-direction:column;
}
.person-card:hover{transform:translateY(-4px)}
.person-photo{position:relative;aspect-ratio:4/3;background:linear-gradient(135deg,#EFE6D2,#E2D5B8);overflow:hidden}
.person-photo img{width:100%;height:100%;object-fit:cover;object-position:top}
.person-photo .noimg{
  position:absolute;inset:0;display:grid;place-items:center;
  font-family:var(--serif);font-size:52px;font-weight:900;color:rgba(192,57,43,.5);
  background:repeating-linear-gradient(45deg,transparent 0 12px,rgba(192,57,43,.05) 12px 24px);
}
.person-photo .era-badge{
  position:absolute;left:10px;top:10px;font-size:11px;background:var(--kon);color:#fff;
  padding:3px 10px;border-radius:99px;letter-spacing:1px;
}
.person-body{padding:16px 18px 18px;flex:1;display:flex;flex-direction:column}
.person-body h3{font-size:18px}
.person-body .kana{font-size:12px;color:var(--ink-soft);letter-spacing:.5px;margin-bottom:8px}
.person-body p{font-size:13.8px;color:var(--ink-soft);flex:1}
.person-quote{
  margin-top:10px;font-family:var(--serif);font-size:13.5px;color:var(--kon);
  background:var(--paper-2);border-left:3px solid var(--kin);padding:8px 12px;border-radius:0 8px 8px 0;
}
.src-note{font-size:11.5px;color:#9a917c;margin-top:10px;line-height:1.5}
.src-note a{color:#8a7f66;text-decoration:underline dotted}

/* 年表 */
.timeline{position:relative;padding-left:26px;margin:6px 0}
.timeline::before{content:"";position:absolute;left:8px;top:6px;bottom:6px;width:2.5px;background:linear-gradient(var(--shu),var(--kin));border-radius:3px;opacity:.55}
.tl-item{position:relative;padding:0 0 20px 16px}
.tl-item::before{
  content:"";position:absolute;left:-24px;top:8px;width:13px;height:13px;border-radius:50%;
  background:var(--card);border:3.5px solid var(--shu);
}
.tl-item .yr{font-family:var(--serif);font-weight:900;color:var(--shu);font-size:16.5px}
.tl-item b{font-size:15.5px;font-family:var(--serif)}
.tl-item p{font-size:13.8px;color:var(--ink-soft);margin-top:2px}
.tl-item .src-note{margin-top:4px}

/* 画廊 */
.gallery{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px}
.gal-item{
  position:relative;border-radius:12px;overflow:hidden;cursor:zoom-in;background:#E8DFC9;
  border:1.5px solid var(--line);aspect-ratio:4/3;
}
.gal-item img{width:100%;height:100%;object-fit:cover;transition:transform .4s ease}
.gal-item:hover img{transform:scale(1.06)}
.gal-item .cap{
  position:absolute;left:0;right:0;bottom:0;padding:26px 12px 10px;color:#fff;font-size:13px;
  background:linear-gradient(transparent,rgba(20,20,18,.82));
}
.gal-item .cap small{display:block;font-size:10.5px;opacity:.75;margin-top:2px}

/* 冷知识 */
.facts{display:grid;grid-template-columns:repeat(auto-fill,minmax(280px,1fr));gap:14px}
.fact{
  background:var(--card);border:1.5px dashed var(--kin);border-radius:var(--radius);
  padding:18px 18px 14px;position:relative;box-shadow:var(--shadow);
}
.fact::before{
  content:"豆";position:absolute;top:-14px;left:14px;width:30px;height:30px;border-radius:50%;
  background:var(--kin);color:#fff;display:grid;place-items:center;font-size:15px;font-family:var(--serif);
  box-shadow:0 3px 8px rgba(201,164,71,.4);
}
.fact h4{font-size:15.5px;margin-bottom:6px;color:var(--kon)}
.fact p{font-size:13.5px;color:var(--ink-soft)}

/* 时代内游戏入口 */
.era-games{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:14px}
.game-entry{
  background:var(--card);border:1.5px solid var(--line);border-radius:var(--radius);padding:18px;
  box-shadow:var(--shadow);transition:.22s;position:relative;display:flex;flex-direction:column;gap:6px;
}
.game-entry:hover{transform:translateY(-4px);border-color:var(--era,var(--shu))}
.game-entry .gicon{
  width:44px;height:44px;border-radius:10px;display:grid;place-items:center;font-size:22px;
  background:linear-gradient(135deg,rgba(235,97,1,.12),rgba(201,164,71,.16));
}
.game-entry h3{font-size:16.5px}
.game-entry p{font-size:13px;color:var(--ink-soft);flex:1}
.game-entry .best{font-size:12.5px;color:var(--matcha);font-weight:700}
.game-entry .stamp-done{
  position:absolute;top:12px;right:12px;width:34px;height:34px;border-radius:50%;
  background:var(--red-seal);color:#fff;display:grid;place-items:center;font-size:12px;font-family:var(--serif);
  transform:rotate(12deg);box-shadow:0 4px 10px rgba(192,57,43,.4);
}

/* ---------- 游戏通用 ---------- */
.game-shell{
  background:var(--card);border:1.5px solid var(--line);border-radius:var(--radius);
  padding:26px 28px;box-shadow:var(--shadow);max-width:860px;margin:0 auto;
}
.game-head{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:18px}
.game-head h2{font-size:21px;flex:1}
.game-head .count{font-size:13px;color:var(--ink-soft)}
.gbar{height:9px;border-radius:99px;background:var(--paper-2);border:1px solid var(--line);overflow:hidden;margin-bottom:22px}
.gbar i{display:block;height:100%;background:linear-gradient(90deg,var(--shu),var(--kin));border-radius:99px;transition:width .4s ease}
.q-card h3{font-size:18.5px;margin-bottom:16px;line-height:1.65}
.opts{display:grid;gap:10px}
.opt{
  text-align:left;background:var(--paper-2);border:1.5px solid var(--line);border-radius:12px;
  padding:13px 16px;font-size:15px;transition:.18s;display:flex;gap:10px;align-items:flex-start;
}
.opt .tag{
  flex:none;width:26px;height:26px;border-radius:50%;background:var(--kon);color:#fff;
  display:grid;place-items:center;font-size:13px;font-family:var(--serif);margin-top:1px;
}
.opt:hover:not(:disabled){border-color:var(--shu);transform:translateX(4px)}
.opt.correct{background:#EAF4E4;border-color:var(--matcha);font-weight:700}
.opt.correct .tag{background:var(--matcha)}
.opt.wrong{background:#FBEAE7;border-color:var(--shu-deep)}
.opt.wrong .tag{background:var(--shu-deep)}
.opt:disabled{cursor:default;opacity:.92}

/* 解析面板 */
.explain{
  margin-top:18px;border-radius:12px;border:1.5px solid var(--kin);
  background:linear-gradient(180deg,#FFFBEE,#FDF6DF);padding:16px 18px;animation:fadein .3s ease;
}
.explain .verdict{display:flex;align-items:center;gap:8px;font-family:var(--serif);font-weight:900;font-size:17px}
.explain .verdict.ok{color:var(--matcha)}
.explain .verdict.no{color:var(--shu-deep)}
.explain h5{font-size:13.5px;color:var(--shu);margin:12px 0 4px;display:flex;align-items:center;gap:6px}
.explain h5::before{content:"◆";font-size:9px}
.explain p{font-size:14px;color:var(--ink-soft)}
.game-actions{margin-top:20px;display:flex;gap:12px;justify-content:flex-end;flex-wrap:wrap}

/* 结果页 */
.result{text-align:center;padding:16px 0}
.result .big{font-size:54px}
.result h3{font-size:24px;margin:8px 0}
.result .score{font-size:17px;color:var(--ink-soft);margin-bottom:6px}
.stamp-anim{
  display:inline-block;margin:14px auto 4px;padding:14px 26px;border:3.5px solid var(--red-seal);
  color:var(--red-seal);font-family:var(--serif);font-size:26px;font-weight:900;border-radius:12px;
  letter-spacing:6px;transform:rotate(-6deg);animation:stamp .5s cubic-bezier(.2,1.6,.4,1);
  background:rgba(192,57,43,.05);
}
@keyframes stamp{0%{transform:scale(2.2) rotate(-14deg);opacity:0}60%{transform:scale(.95) rotate(-5deg);opacity:1}100%{transform:scale(1) rotate(-6deg)}}
.result .tip{font-size:14px;color:var(--ink-soft);max-width:52ch;margin:10px auto 0}

/* 时间轴游戏 */
.pool,.slots{display:flex;flex-wrap:wrap;gap:10px;min-height:56px}
.slots{background:var(--paper-2);border:1.5px dashed var(--line);border-radius:12px;padding:12px;margin-bottom:14px}
.pool{padding:4px 0}
.ev-chip{
  background:var(--card);border:1.5px solid var(--kon);color:var(--kon);border-radius:10px;
  padding:9px 13px;font-size:13.8px;transition:.15s;max-width:100%;
}
.ev-chip:hover{background:var(--kon);color:#fff}
.ev-chip.used{opacity:.35;pointer-events:none}
.slot-item{
  display:flex;align-items:center;gap:8px;background:var(--kon);color:#fff;border-radius:10px;
  padding:9px 13px;font-size:13.8px;
}
.slot-item button{background:none;border:none;color:#fff;font-size:15px;opacity:.8}
.slot-item .ord{font-family:var(--serif);color:#F5C86B;font-weight:900}
.tl-verdict{margin-top:14px}
.tl-verdict .row{display:flex;gap:10px;align-items:flex-start;padding:10px 12px;border-radius:10px;margin-bottom:8px;font-size:14px}
.tl-verdict .row.ok{background:#EAF4E4}
.tl-verdict .row.no{background:#FBEAE7}
.tl-verdict .row b{font-family:var(--serif)}
.tl-verdict .row .why{font-size:12.8px;color:var(--ink-soft);display:block;margin-top:2px}

/* 人物竞猜 */
.guess-photo{position:relative;width:100%;max-width:340px;margin:0 auto 16px;aspect-ratio:4/3;border-radius:14px;overflow:hidden;border:1.5px solid var(--line);background:#E8DFC9}
.guess-photo img{width:100%;height:100%;object-fit:cover;object-position:top}
.guess-photo.mystery img{filter:brightness(0) contrast(.2);opacity:.85}
.guess-photo .mark{
  position:absolute;inset:0;display:grid;place-items:center;font-family:var(--serif);
  font-size:64px;color:rgba(192,57,43,.55);font-weight:900;
}
.clues{list-style:none;margin:0 0 16px;display:grid;gap:8px}
.clues li{
  background:var(--paper-2);border:1.5px solid var(--line);border-radius:10px;
  padding:9px 14px;font-size:14px;display:flex;gap:10px;
}
.clues li .cn{color:var(--shu);font-family:var(--serif);font-weight:900}

/* 翻牌配对 */
.match-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:11px;perspective:900px}
.mcard{aspect-ratio:5/3.4;cursor:pointer}
.mcard-inner{position:relative;width:100%;height:100%;transform-style:preserve-3d;transition:transform .45s cubic-bezier(.3,1.2,.4,1)}
.mcard.flip .mcard-inner,.mcard.done .mcard-inner{transform:rotateY(180deg)}
.mface{
  position:absolute;inset:0;border-radius:11px;display:grid;place-items:center;text-align:center;
  backface-visibility:hidden;padding:8px;font-size:13.5px;
}
.mface.front{
  background:linear-gradient(135deg,var(--kon),var(--kon-deep));color:#F5C86B;
  font-family:var(--serif);font-size:24px;font-weight:900;border:2px solid var(--kin);
}
.mface.back{background:var(--paper-2);border:1.5px solid var(--kin);transform:rotateY(180deg);color:var(--ink);line-height:1.5}
.mcard.done .mface.back{background:#EAF4E4;border-color:var(--matcha)}
.mcard.done{cursor:default}
.mcard.shake .mcard-inner{animation:shake .35s}
@keyframes shake{0%,100%{transform:rotateY(180deg) translateX(0)}25%{transform:rotateY(180deg) translateX(-5px)}75%{transform:rotateY(180deg) translateX(5px)}}
.match-meta{display:flex;gap:16px;font-size:13.5px;color:var(--ink-soft);margin-bottom:14px;flex-wrap:wrap}

/* ---------- 图鉴 ---------- */
.coll-filter{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:18px}
.coll-filter button{border:1.5px solid var(--line);background:var(--card);border-radius:99px;padding:6px 14px;font-size:13px;color:var(--ink-soft)}
.coll-filter button.active{background:var(--kon);border-color:var(--kon);color:#fff}
.coll-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:14px}
.coll-card{border-radius:var(--radius);overflow:hidden;border:1.5px solid var(--line);background:var(--card);box-shadow:var(--shadow);position:relative;transition:.2s}
.coll-card:hover{transform:translateY(-3px)}
.coll-card .ph{aspect-ratio:3/3.4;background:linear-gradient(135deg,#EFE6D2,#E2D5B8);overflow:hidden;position:relative}
.coll-card .ph img{width:100%;height:100%;object-fit:cover;object-position:top}
.coll-card.locked .ph img{filter:brightness(0) contrast(.15) opacity(.6)}
.coll-card.locked .ph::after{
  content:"？";position:absolute;inset:0;display:grid;place-items:center;
  font-size:52px;font-family:var(--serif);font-weight:900;color:rgba(192,57,43,.6);
}
.coll-card .nm{padding:10px 12px 12px;font-family:var(--serif);font-weight:900;font-size:15.5px;text-align:center}
.coll-card .nm small{display:block;font-weight:400;font-size:11px;color:var(--ink-soft);margin-top:2px}
.coll-card.locked{opacity:.82}
.lock-hint{font-size:12px;color:var(--shu);text-align:center;padding:0 8px 10px}

/* ---------- 错题本 ---------- */
.wrong-item{
  background:var(--card);border:1.5px solid var(--line);border-left:5px solid var(--shu-deep);
  border-radius:12px;padding:18px 20px;margin-bottom:14px;box-shadow:var(--shadow);
}
.wrong-item h4{font-size:16px;margin-bottom:10px}
.wrong-item .meta{font-size:12px;color:var(--ink-soft);margin-bottom:8px}
.wrong-actions{margin-top:12px;display:flex;gap:10px}

/* ---------- 参考资料 ---------- */
.ref-group{background:var(--card);border:1.5px solid var(--line);border-radius:var(--radius);padding:20px 24px;margin-bottom:16px;box-shadow:var(--shadow)}
.ref-group h3{font-size:17px;margin-bottom:10px;color:var(--kon)}
.ref-group ul{list-style:none;display:grid;gap:7px}
.ref-group li{font-size:13.5px;color:var(--ink-soft);padding-left:16px;position:relative}
.ref-group li::before{content:"▪";position:absolute;left:0;color:var(--kin);font-size:10px;top:3px}
.ref-group li a{text-decoration:underline dotted;word-break:break-all}

/* ---------- 关于 ---------- */
.about-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(270px,1fr));gap:14px}
.about-card{background:var(--card);border:1.5px solid var(--line);border-radius:var(--radius);padding:20px 22px;box-shadow:var(--shadow)}
.about-card h3{font-size:16.5px;margin-bottom:8px;color:var(--kon)}
.about-card p{font-size:13.8px;color:var(--ink-soft)}

/* ---------- 空状态 / 提示 ---------- */
.empty{
  text-align:center;padding:60px 20px;color:var(--ink-soft);
  background:var(--card);border:1.5px dashed var(--line);border-radius:var(--radius);
}
.empty .big{font-size:44px;margin-bottom:10px}

/* ---------- toast ---------- */
#toast{
  position:fixed;left:50%;bottom:34px;transform:translateX(-50%) translateY(20px);
  background:var(--kon);color:#fff;padding:11px 22px;border-radius:99px;font-size:14px;
  opacity:0;pointer-events:none;transition:.3s;z-index:99;box-shadow:0 8px 24px rgba(22,38,75,.35);
  max-width:86vw;text-align:center;
}
#toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* ---------- lightbox ---------- */
.lightbox{
  position:fixed;inset:0;background:rgba(20,20,18,.88);z-index:100;
  display:grid;place-items:center;padding:26px;
}
.lightbox[hidden]{display:none}
.lightbox figure{max-width:min(920px,94vw);text-align:center}
.lightbox img{max-height:76vh;max-width:100%;margin:0 auto;border-radius:10px;box-shadow:0 20px 60px rgba(0,0,0,.5)}
.lightbox figcaption{color:#e8e2d2;font-size:13.5px;margin-top:12px;line-height:1.6}
.lightbox figcaption small{color:#a99f88;display:block;margin-top:3px;font-size:11.5px}
.lightbox-close{
  position:absolute;top:18px;right:22px;background:rgba(255,255,255,.14);border:1px solid rgba(255,255,255,.4);
  color:#fff;width:40px;height:40px;border-radius:50%;font-size:17px;
}

/* ---------- 页脚 ---------- */
.site-footer{background:var(--kon-deep);color:rgba(255,255,255,.75);margin-top:40px}
.footer-inner{max-width:1160px;margin:0 auto;padding:34px 22px;text-align:center;font-size:13px;display:grid;gap:6px}
.footer-seal{
  display:inline-block;border:2px solid rgba(255,255,255,.55);color:#fff;border-radius:8px;
  padding:6px 14px;font-family:var(--serif);letter-spacing:6px;font-size:15px;transform:rotate(-2deg);
}
.footer-inner a{color:#F5C86B}

/* ---------- 响应式 ---------- */
@media (max-width:980px){
  .dashboard{grid-template-columns:1fr}
  .era-nav{grid-template-columns:repeat(3,1fr)}
}
@media (max-width:760px){
  .site-nav{
    display:none;position:absolute;top:100%;left:0;right:0;flex-direction:column;
    background:var(--paper-2);border-bottom:2px solid var(--line);padding:10px 16px;gap:4px;
    box-shadow:0 14px 24px rgba(43,43,40,.12);
  }
  .site-nav.open{display:flex}
  .nav-toggle{display:block;margin-left:auto}
  .header-progress{display:none}
  .era-nav{grid-template-columns:repeat(2,1fr)}
  .hero-inner{padding:36px 24px 32px}
  .era-hero-inner{flex-direction:column;align-items:flex-start;padding:26px 22px}
  .era-vertical{writing-mode:horizontal-tb;border-right:none;border-bottom:3px solid var(--kin);padding:0 0 8px;letter-spacing:6px;max-height:none}
  .match-grid{grid-template-columns:repeat(3,1fr)}
  .game-shell{padding:20px 16px}
}
@media (max-width:520px){
  .era-nav{grid-template-columns:1fr}
  .match-grid{grid-template-columns:repeat(2,1fr)}
  .dash-ring{flex-direction:column}
}