/* ============================================================
   语文情境化课堂 · 三端设计系统 v2
   趋势参考：玻璃拟态(带对比度护栏) / 软空间感 / 微交互 / 侧栏仪表盘
   电脑端=浅色侧栏工作台 · 大屏端=影院式暗色 · 移动端=底部导航 H5
   ============================================================ */

/* ---------- 令牌 ---------- */
:root{
  --bg:#f5f8fd; --bg-2:#e9eff9; --surface:#ffffff; --ink:#182720; --ink-2:#3d4f45; --muted:#75857c;
  --brand:#17714d; --brand-2:#28a173; --brand-weak:#e2f2e9; --brand-grad:linear-gradient(135deg,#17714d,#28a173);
  --accent:#e08a2e; --accent-weak:#fbeedd; --danger:#cf5b52;
  --line:#e2e8e1; --line-2:#d3ddd3;
  --sh-sm:0 1px 2px rgba(23,39,32,.06),0 2px 8px rgba(23,39,32,.05);
  --sh-md:0 6px 24px rgba(23,39,32,.10);
  --sh-lg:0 16px 48px rgba(23,39,32,.16);
  --r-sm:10px; --r:14px; --r-lg:20px;
  --sans:"PingFang SC","Microsoft YaHei UI","Segoe UI",system-ui,sans-serif;
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;padding:0}
body{background:var(--bg);color:var(--ink);font-family:var(--sans);line-height:1.65;font-size:15.5px}
a{color:var(--brand);text-decoration:none}
h1,h2,h3{margin:.35em 0;line-height:1.35}
::selection{background:#bfe6d2}
button{font-family:inherit;cursor:pointer}
::-webkit-scrollbar{width:9px;height:9px}
::-webkit-scrollbar-thumb{background:#c6d2c8;border-radius:9px;border:2px solid transparent;background-clip:content-box}
::-webkit-scrollbar-track{background:transparent}

/* ---------- 动画 ---------- */
@keyframes fadeUp{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:none}}
@keyframes popIn{from{opacity:0;transform:scale(.92)}to{opacity:1;transform:scale(1)}}
@keyframes blink{0%,80%,100%{transform:scale(.5);opacity:.35}40%{transform:scale(1);opacity:1}}
@keyframes pulseRing{0%{box-shadow:0 0 0 0 rgba(207,91,82,.45)}70%{box-shadow:0 0 0 14px rgba(207,91,82,0)}100%{box-shadow:0 0 0 0 rgba(207,91,82,0)}}
@keyframes fabPulse{0%{box-shadow:0 8px 22px rgba(23,113,77,.42)}50%{box-shadow:0 8px 30px rgba(40,161,115,.62)}100%{box-shadow:0 8px 22px rgba(23,113,77,.42)}}
@keyframes aurora{0%{background-position:0% 40%}50%{background-position:100% 60%}100%{background-position:0% 40%}}
@keyframes eq{0%,100%{transform:scaleY(.35)}50%{transform:scaleY(1)}}
@keyframes sheen{from{background-position:200% 0}to{background-position:-200% 0}}
@keyframes spin{to{transform:rotate(360deg)}}

/* ---------- 通用组件 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:7px;border:none;background:var(--brand-grad);color:#fff;
  border-radius:12px;padding:9px 18px;font-size:.95rem;font-weight:600;box-shadow:0 3px 12px rgba(23,113,77,.28);
  transition:transform .15s ease,box-shadow .15s ease,filter .15s ease;white-space:nowrap}
.btn:hover{transform:translateY(-1px);box-shadow:0 6px 18px rgba(23,113,77,.34);filter:brightness(1.05)}
.btn:active{transform:translateY(0) scale(.98)}
.btn.ghost{background:var(--brand-weak);color:var(--brand);box-shadow:none}
.btn.ghost:hover{background:#d4ecdf}
.btn.light{background:#fff;color:var(--ink-2);border:1px solid var(--line-2);box-shadow:var(--sh-sm)}
.btn.danger{background:linear-gradient(135deg,#d4675e,#cf5b52);box-shadow:0 3px 12px rgba(207,91,82,.3)}
.btn.sm{padding:5px 12px;font-size:.85rem;border-radius:9px}
.btn.lg{padding:13px 26px;font-size:1.05rem;border-radius:14px}
.btn:disabled{opacity:.5;cursor:not-allowed;transform:none}
.card{background:var(--surface);border:1px solid var(--line);border-radius:var(--r-lg);padding:22px 24px;box-shadow:var(--sh-sm);
  transition:box-shadow .2s ease,transform .2s ease}
.tag{display:inline-flex;align-items:center;gap:4px;background:var(--brand-weak);color:var(--brand);border-radius:999px;padding:2px 11px;font-size:.76rem;font-weight:600}
.tag.orange{background:var(--accent-weak);color:#92400e}
.tag.gray{background:#eef1ee;color:#6d7c73}
.tag.red{background:#fae7e5;color:var(--danger)}
input,select,textarea{font-family:inherit;font-size:.95rem;border:1.5px solid var(--line-2);border-radius:12px;padding:10px 14px;background:#fff;color:var(--ink);width:100%;
  transition:border-color .15s ease,box-shadow .15s ease}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--brand-2);box-shadow:0 0 0 4px rgba(40,161,115,.14)}
textarea{min-height:88px;resize:vertical}
label.f{display:block;margin:12px 0 5px;font-size:.85rem;font-weight:600;color:var(--muted);letter-spacing:.02em}
.row{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.muted{color:var(--muted);font-size:.88rem}
.hidden{display:none!important}
.pill{border:1.5px solid var(--line-2);border-radius:999px;padding:6px 15px;background:#fff;color:var(--ink-2);font-size:.87rem;font-weight:500;
  transition:all .15s ease}
.pill:hover{border-color:var(--brand-2);color:var(--brand)}
.pill.on{background:var(--brand-grad);color:#fff;border-color:transparent;box-shadow:0 3px 10px rgba(23,113,77,.3)}
.kbd{font-family:Consolas,monospace;background:#eef1ee;border-radius:6px;padding:0 7px;border:1px solid var(--line)}
.toast{position:fixed;top:22px;left:50%;transform:translateX(-50%) translateY(-8px);background:rgba(24,39,32,.92);color:#fff;
  padding:11px 24px;border-radius:999px;z-index:99;font-size:.92rem;box-shadow:var(--sh-lg);opacity:0;animation:fadeUp .25s ease forwards;
  backdrop-filter:blur(6px)}
table.tb{width:100%;border-collapse:collapse;font-size:.9rem;background:#fff}
table.tb th,table.tb td{border-bottom:1px solid var(--line);padding:10px 12px;text-align:left;vertical-align:top}
table.tb th{color:var(--muted);font-weight:600;background:#f7faf7;font-size:.82rem;letter-spacing:.03em}
table.tb tr:hover td{background:#fafcf9}
.empty{padding:34px;text-align:center;color:var(--muted);font-size:.92rem}


/* 主色主题（顶栏圆点可切换） */
body{--pc1:#4f9cff;--pc2:#2f7cf6;--pc3:#1d4ed8;--pcx:#22b573;--pcw:#e8f1ff;--pcs:rgba(47,124,246,.28)}
body[data-pc="apple"]{--pc1:#5fd38a;--pc2:#1f9d57;--pc3:#147a42;--pcx:#f59e0b;--pcw:#e3f7ec;--pcs:rgba(31,157,87,.26)}
body[data-pc="orange"]{--pc1:#ffb45e;--pc2:#f97316;--pc3:#e05e0b;--pcx:#15803d;--pcw:#fff1e2;--pcs:rgba(249,115,22,.26)}
body[data-pc="rose"]{--pc1:#fb8a8a;--pc2:#e5484d;--pc3:#c22f3a;--pcx:#f59e0b;--pcw:#fdeeee;--pcs:rgba(229,72,77,.24)}
body[data-pc="violet"]{--pc1:#b79cff;--pc2:#7c5cf0;--pc3:#6133c9;--pcx:#ec4899;--pcw:#f0ecff;--pcs:rgba(124,92,240,.26)}
body[data-pc="teal"]{--pc1:#4fd6c7;--pc2:#0d9488;--pc3:#0b7d74;--pcx:#3b82f6;--pcw:#e2f7f5;--pcs:rgba(13,148,136,.24)}
.tsw{display:flex;gap:7px;align-items:center;margin-right:6px}
.tsw i{width:17px;height:17px;border-radius:50%;cursor:pointer;border:2px solid rgba(255,255,255,.45);transition:transform .15s ease,border-color .15s ease}
.tsw i:hover{transform:scale(1.2)}
.tsw i.on{border-color:#fff;transform:scale(1.18)}
.tsw i.t-sky{background:linear-gradient(135deg,#4f9cff,#2f7cf6)}
.tsw i.t-apple{background:linear-gradient(135deg,#5fd38a,#1f9d57)}
.tsw i.t-orange{background:linear-gradient(135deg,#ffb45e,#f97316)}
.tsw i.t-rose{background:linear-gradient(135deg,#fb8a8a,#e5484d)}
.tsw i.t-violet{background:linear-gradient(135deg,#b79cff,#7c5cf0)}
.tsw i.t-teal{background:linear-gradient(135deg,#4fd6c7,#0d9488)}

/* ============================================================
   电脑端（纸墨·语文：宣纸底 + 墨字 + 朱砂印章 + 季节淡彩）
   ============================================================ */
body{--paper:#f6f1e6;--paper-2:#fbf8f0;--ink-1:#2b2924;--ink-2:#57534a;--ink-3:#8d8676;
  --zhu:#b8432f;--zhu-deep:#8f3020;--zhu-weak:rgba(184,67,47,.08);
  --dai:#41606c;--line-ink:#d9d2c0;
  --kai:"KaiTi","STKaiti","DFKai-SB","Kaiti SC",serif}
body:not(.screen):not(.mobile){
  background:radial-gradient(120% 90% at 12% 6%,rgba(65,96,108,.06),transparent 55%),
             radial-gradient(100% 85% at 90% 94%,rgba(184,67,47,.05),transparent 58%),
             repeating-linear-gradient(0deg,rgba(43,41,36,.015) 0 1px,transparent 1px 3px),
             repeating-linear-gradient(90deg,rgba(43,41,36,.012) 0 1px,transparent 1px 4px),
             linear-gradient(168deg,#f7f2e7 0%,#f3ecd9 100%);
  color:var(--ink-1)}
@keyframes inkIn{from{opacity:0;filter:blur(4px);transform:translateY(5px)}to{opacity:1;filter:blur(0);transform:none}}

/* 按钮：朱砂印章式 */
#auth .btn, #app .btn{background:var(--zhu);color:#fbf6ec;border:1.5px solid var(--zhu-deep);
  border-radius:9px;box-shadow:0 2px 0 var(--zhu-deep);font-weight:700}
#auth .btn:hover, #app .btn:hover{filter:none;transform:translateY(-1px);box-shadow:0 3px 0 var(--zhu-deep)}
#auth .btn:active, #app .btn:active{transform:translateY(1px);box-shadow:0 0 0 var(--zhu-deep)}
#app .btn.ghost{background:transparent;color:var(--ink-1);border:1.5px solid var(--line-ink);box-shadow:none}
#app .btn.ghost:hover{border-color:var(--ink-2);transform:none;box-shadow:none;background:rgba(43,41,36,.04)}
#app .btn.light{background:var(--paper-2);color:var(--ink-1);border:1.5px solid var(--line-ink);box-shadow:none}
#app .btn.light:hover{transform:none;box-shadow:none;border-color:var(--ink-2)}

/* 纸卡、输入框 */
#app .card{background:var(--paper-2);border:1.5px solid var(--line-ink);border-radius:14px;
  box-shadow:0 1px 3px rgba(62,52,30,.06)}
#app input, #app select, #app textarea{background:#fffdf7;border:1.5px solid var(--line-ink);
  border-radius:8px;color:var(--ink-1)}
#app input:focus, #app select:focus, #app textarea:focus{border-color:var(--zhu);
  box-shadow:0 0 0 3px rgba(184,67,47,.12);outline:none}
#app .tag.gray{background:#ece5d2;color:var(--ink-2)}
#app .tag.orange{background:#f5e7cf;color:#8a5a18}
#app table.tb th{background:#f0e9d8;color:var(--ink-2)}
#app table.tb th, #app table.tb td{border-color:var(--line-ink)}
#app table.tb tr:hover td{background:#f6f0e1}
#app .empty{color:var(--ink-3)}

/* 登录（水墨宣纸侧） */
.auth-card{border-radius:18px}
.auth-side{color:var(--ink-1);border-right:1.5px solid var(--line-ink);
  background:repeating-linear-gradient(0deg,rgba(43,41,36,.015) 0 1px,transparent 1px 3px),
             radial-gradient(85% 65% at 18% 12%,rgba(65,96,108,.26),transparent 66%),
             radial-gradient(75% 60% at 88% 85%,rgba(184,67,47,.15),transparent 66%),
             radial-gradient(55% 45% at 62% 38%,rgba(58,63,85,.14),transparent 72%),
             linear-gradient(160deg,#f7f2e7,#efe8d6)}
.auth-side .lmark{display:inline-flex;width:46px;height:46px;border-radius:9px;background:var(--zhu);
  color:#fbf6ec;font-family:var(--kai);font-size:1.4rem;font-weight:700;align-items:center;
  justify-content:center;margin-right:12px;vertical-align:middle;
  box-shadow:inset 0 0 0 2px rgba(251,246,236,.4),0 1px 0 var(--zhu-deep)}
.auth-side .logo{font-family:var(--kai);font-size:1.5rem;font-weight:700;color:var(--ink-1);letter-spacing:.06em}
.auth-side p{color:var(--ink-2)}
.auth-side .dots i{background:var(--zhu)}
.auth-side .dots i:nth-child(2){background:var(--dai)}
.auth-side .dots i:nth-child(3){background:#c08a3e}
#auth h2{font-family:var(--kai);letter-spacing:.05em}

/* 顶部：纸白栏 + 朱印 logo + 朱砂选中章 */
.pc-app{min-height:100vh;display:flex;flex-direction:column}
.pc-top{position:sticky;top:0;z-index:40;display:flex;align-items:center;gap:16px;
  padding:12px 26px;background:rgba(251,248,240,.94);backdrop-filter:blur(8px);color:var(--ink-1);
  border-bottom:1.5px solid var(--line-ink);box-shadow:0 2px 10px rgba(62,52,30,.06)}
.pc-top .brand{display:flex;align-items:center;gap:10px;font-family:var(--kai);font-weight:700;
  font-size:1.2rem;letter-spacing:.05em;white-space:nowrap}
.pc-top .brand .mark{width:38px;height:38px;border-radius:8px;background:var(--zhu);color:#fbf6ec;
  display:flex;align-items:center;justify-content:center;font-size:1.25rem;font-family:var(--kai);
  box-shadow:inset 0 0 0 2px rgba(251,246,236,.4),0 1px 0 var(--zhu-deep)}
.cnav{display:flex;gap:4px;flex:1;flex-wrap:wrap}
.cnav .nav-item{display:flex;align-items:center;gap:7px;padding:8px 15px;border-radius:8px;cursor:pointer;
  background:transparent;color:var(--ink-2);font-size:.93rem;font-weight:600;user-select:none;
  transition:background .15s ease,color .15s ease;white-space:nowrap}
.cnav .nav-item .ico{display:none}
.cnav .nav-item:hover{background:rgba(43,41,36,.07);color:var(--ink-1)}
.cnav .nav-item.on{background:var(--zhu);color:#fbf6ec;font-weight:700;box-shadow:0 2px 0 var(--zhu-deep)}
.pc-top .who{display:flex;align-items:center;gap:10px}
.pc-top .who .ava{width:36px;height:36px;border-radius:50%;background:transparent;color:var(--ink-1);
  border:1.5px solid var(--ink-1);font-family:var(--kai);font-weight:700;
  display:flex;align-items:center;justify-content:center}
.pc-top .who .nm{font-size:.92rem;font-weight:700}
.pc-top .who .out{background:transparent;border:1.5px solid var(--line-ink);color:var(--ink-2);
  font-size:.8rem;cursor:pointer;padding:5px 12px;border-radius:8px}
.pc-top .who .out:hover{border-color:var(--ink-1);color:var(--ink-1)}

.main{flex:1;width:100%;max-width:1220px;margin:0 auto;padding:26px 28px 70px}
main section{animation:inkIn .4s ease}
.page-head{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:20px;flex-wrap:wrap}
.page-head h2{margin:0;font-family:var(--kai);font-size:1.55rem;letter-spacing:.06em;color:var(--ink-1)}
.page-head .sub{color:var(--ink-3);font-size:.88rem;margin-top:2px}

/* 对话：纸面气泡 */
.chat-card{display:flex;flex-direction:column;height:calc(100vh - 170px);min-height:480px;padding:0;
  overflow:hidden;max-width:1080px;margin:0 auto}
.chat-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:15px 22px;
  border-bottom:1.5px solid var(--line-ink);background:transparent}
.chat-head select{width:min(300px,44vw)}
.mode-badge{font-size:.78rem;font-weight:700;color:#8a5a18;background:#f5e7cf;padding:4px 12px;border-radius:4px}
.mode-badge.live{color:#4a6a3a;background:#e6ecd7}
.chatlog{flex:1;overflow-y:auto;padding:22px;display:flex;flex-direction:column;gap:16px}
.chatrow{display:flex;gap:10px;max-width:82%;animation:inkIn .3s ease}
.chatrow.user{align-self:flex-end;flex-direction:row-reverse}
.ava{width:38px;height:38px;border-radius:10px;flex:none;display:flex;align-items:center;justify-content:center;font-size:1.1rem}
.ava.bot{background:#e9e2cf;border:1px solid var(--line-ink)}
.ava.teacher{background:#f5e7cf;border:1px solid #ddc9a4}
.bubble{padding:12px 16px;border-radius:12px;font-size:.95rem;white-space:pre-wrap;word-break:break-word}
.chatrow.bot .bubble{background:#fffdf7;border:1.5px solid var(--line-ink);border-top-left-radius:4px}
.chatrow.user .bubble{background:var(--dai);color:#f4f1e6;border-bottom-right-radius:4px}
.bubble .demo-chip{display:inline-block;margin-left:8px;font-size:.68rem;font-weight:800;color:#8a5a18;
  background:#f5e7cf;border:1px solid #ddc9a4;border-radius:4px;padding:1px 8px;vertical-align:2px}
.bubble .codeblock{display:block;background:#f2ecdd;border:1.5px dashed #c9bfa6;border-radius:8px;
  padding:10px 12px;margin:8px 0;font-size:.84rem;font-family:Consolas,Menlo,monospace;white-space:pre-wrap;color:var(--ink-2)}
.typing{display:inline-flex;gap:5px;padding:6px 2px}
.typing i{width:7px;height:7px;border-radius:50%;background:var(--zhu);animation:blink 1.2s infinite}
.typing i:nth-child(2){animation-delay:.18s}.typing i:nth-child(3){animation-delay:.36s}
.chips{display:flex;gap:9px;flex-wrap:wrap;padding:0 22px 12px}
.chips .pill{border:1.5px solid var(--line-ink);color:var(--dai);font-weight:600;background:transparent}
.chips .pill:hover{background:rgba(65,96,108,.08);transform:translateY(-1px)}
.chatinput{display:flex;gap:12px;padding:14px 22px 18px;border-top:1.5px solid var(--line-ink);background:transparent}
.chatinput textarea{min-height:54px;flex:1}
.chatinput .btn{align-self:flex-end;height:46px;padding:0 26px}

/* 课文纸卡：季节淡彩封面 + 竖排楷体题名 + 单字课型印 */
.grid-l{display:grid;grid-template-columns:repeat(auto-fill,minmax(255px,1fr));gap:18px;grid-auto-rows:1fr}
.lcard{display:flex;flex-direction:column;background:var(--paper-2);border:1.5px solid var(--line-ink);
  border-radius:14px;overflow:hidden;box-shadow:0 1px 3px rgba(62,52,30,.06);cursor:pointer;
  transition:transform .18s ease,box-shadow .18s ease;animation:inkIn .35s ease}
.lcard:hover{transform:translateY(-4px);box-shadow:0 10px 24px rgba(62,52,30,.13);border-color:#b9ad8d}
.lcard.on{border-color:var(--zhu);box-shadow:0 6px 18px rgba(184,67,47,.15)}
.lcover{height:126px;position:relative;overflow:hidden;border-bottom:1px solid var(--line-ink)}
.lcover.chun{background:radial-gradient(120% 95% at 28% 18%,#d9e8d0,transparent 68%),radial-gradient(105% 90% at 78% 82%,#cde3da,transparent 70%),#fbf8f0}
.lcover.xia{background:radial-gradient(120% 95% at 28% 18%,#d2e8e3,transparent 68%),radial-gradient(105% 90% at 78% 82%,#c3dcea,transparent 70%),#fbf8f0}
.lcover.qiu{background:radial-gradient(120% 95% at 28% 18%,#f0ddbb,transparent 68%),radial-gradient(105% 90% at 78% 82%,#e4c69c,transparent 70%),#fbf8f0}
.lcover.dong{background:radial-gradient(120% 95% at 28% 18%,#dfe5ea,transparent 68%),radial-gradient(105% 90% at 78% 82%,#c8cfd8,transparent 70%),#fbf8f0}
.lcover.cao{background:radial-gradient(120% 95% at 28% 18%,#d5e8c2,transparent 66%),radial-gradient(105% 90% at 78% 82%,#bcd9a2,transparent 68%),#fbf8f0}
.lcover.yue{background:radial-gradient(120% 95% at 28% 18%,#c7cfec,transparent 64%),radial-gradient(110% 95% at 74% 80%,#8d97c2,transparent 66%),#f3f1e9}
.lcover.qiao{background:radial-gradient(120% 95% at 28% 18%,#d7dee9,transparent 64%),radial-gradient(105% 90% at 78% 82%,#aebccd,transparent 68%),#fbf8f0}
.lcover.reading{background:radial-gradient(120% 95% at 30% 20%,#e6e2d2,transparent 70%),#fbf8f0}
.lcover.writing{background:radial-gradient(120% 95% at 30% 20%,#f0e4c8,transparent 70%),#fbf8f0}
.lcover.oral{background:radial-gradient(120% 95% at 30% 20%,#ecd9cb,transparent 70%),#fbf8f0}
.lcover .lyin{position:absolute;left:12px;top:12px;width:36px;height:36px;border:1.5px solid var(--zhu);
  color:var(--zhu);border-radius:7px;display:flex;align-items:center;justify-content:center;
  font-family:var(--kai);font-size:1.05rem;font-weight:700;background:rgba(251,248,240,.88)}
.lcover .lv{position:absolute;right:16px;top:50%;transform:translateY(-50%);writing-mode:vertical-rl;
  font-family:var(--kai);font-size:1.45rem;font-weight:700;color:var(--ink-1);letter-spacing:.22em;
  line-height:1;background:rgba(251,248,240,.85);border:1px solid rgba(43,41,36,.22);border-radius:7px;
  padding:13px 7px;box-shadow:0 1px 4px rgba(62,52,30,.08)}
.lbody{flex:1;display:flex;flex-direction:column;padding:13px 16px 15px}
.lbody .ltitle{font-family:var(--kai);font-size:1.16rem;color:var(--ink-1);letter-spacing:.02em}
.lbody .ltags{margin:7px 0 4px;display:flex;gap:6px;flex-wrap:wrap}
.lbody .lmeta{color:var(--ink-3);font-size:.82rem;margin-bottom:12px;white-space:nowrap;
  overflow:hidden;text-overflow:ellipsis}
.lbody .lrow{margin-top:auto}
.lrow{display:flex;align-items:center;justify-content:space-between}
.badge{display:inline-flex;align-items:center;gap:5px;font-size:.78rem;font-weight:700;
  border-radius:4px;padding:3px 10px}
.badge.ok{background:var(--zhu-weak);color:var(--zhu);border:1px solid rgba(184,67,47,.45)}
.badge.wait{background:transparent;color:var(--ink-3);border:1px dashed #b9b19c}
.lcard.ladd{align-items:center;justify-content:center;display:flex;flex-direction:column;gap:8px;
  color:var(--ink-3);border:1.5px dashed #b9b19c;background:transparent;cursor:pointer;
  font-size:.92rem;min-height:230px}
.lcard.ladd:hover{border-color:var(--zhu);color:var(--zhu);background:var(--zhu-weak)}
.ladd-x{font-size:32px;font-weight:300;line-height:1;color:currentColor}
.detail-card{margin-top:18px;animation:inkIn .35s ease}

/* 素材纸卡 */
.mat-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(248px,1fr));gap:16px}
.mat{background:var(--paper-2);border:1.5px solid var(--line-ink);border-radius:14px;overflow:hidden;
  box-shadow:0 1px 3px rgba(62,52,30,.06);transition:all .18s ease;animation:inkIn .3s ease}
.mat:hover{transform:translateY(-3px);box-shadow:0 10px 22px rgba(62,52,30,.12);border-color:#b9ad8d}
.mat .thumb{height:138px;background:#f0e9d8 center/cover;display:flex;align-items:center;
  justify-content:center;font-size:2rem;position:relative;border-bottom:1px solid var(--line-ink)}
.mat .thumb .typeb{position:absolute;left:10px;top:10px;background:rgba(43,41,36,.88);color:#f4f1e6;
  font-size:.72rem;font-weight:700;padding:3px 10px;border-radius:4px}
.mat .body{padding:13px 15px 15px}
.mat .body .name{font-weight:700;font-size:.95rem;margin-bottom:6px;color:var(--ink-1)}
.mat .ops{display:flex;gap:7px;margin-top:11px}

/* 数据：纸卡 + 左侧色条 */
.stat-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:16px;margin-bottom:16px}
.stat{background:var(--paper-2);border:1.5px solid var(--line-ink);border-left-width:5px;border-radius:12px;
  padding:17px 19px;color:var(--ink-1);position:relative;box-shadow:0 1px 3px rgba(62,52,30,.06);
  animation:inkIn .35s ease}
.stat.c1{border-left-color:var(--zhu)}
.stat.c2{border-left-color:#7a9367}
.stat.c3{border-left-color:#c08a3e}
.stat .lb{font-size:.84rem;font-weight:600;color:var(--ink-2)}
.stat .num{font-family:var(--kai);font-size:2.1rem;font-weight:700;margin:2px 0;color:var(--ink-1)}
.stat .num small{font-size:1rem;color:var(--ink-3);font-weight:600}
.stat .bar{height:8px;border-radius:4px;background:#ece5d2;overflow:hidden;margin-top:8px}
.stat .bar i{display:block;height:100%;border-radius:4px;background:var(--zhu);transition:width .6s ease}

/* 素材库：类型筛选与卡片分化 */
.mat-filters{display:flex;gap:8px;flex-wrap:wrap;margin:2px 0 14px}
.mf{padding:6px 14px;border-radius:8px;border:1.5px solid var(--line-ink);background:transparent;
  color:var(--ink-2);font-size:.86rem;font-weight:600;cursor:pointer;font-family:inherit}
.mf:hover{border-color:var(--ink-1);color:var(--ink-1)}
.mf.on{background:var(--zhu);border-color:var(--zhu-deep);color:#fbf6ec;box-shadow:0 2px 0 var(--zhu-deep)}
.mf-clean{margin-left:auto;border-style:dashed;color:var(--ink-3)}
.mf-clean:hover{border-color:var(--danger);color:var(--danger)}
.mf b{margin-left:3px;font-weight:800;opacity:.85}
.mat.t-pano{border-color:rgba(184,67,47,.5)}
.mat.t-pano:hover{border-color:var(--zhu)}
.mat.t-pano .typeb{background:var(--zhu)}
.mat.t-audio .typeb{background:var(--dai)}
.mat.t-read .typeb{background:#8a5a18}
.mat.t-pic .typeb{background:#4a6a3a}
.mat.t-audio .thumb{background:radial-gradient(110% 100% at 30% 20%,#dfe7e9,transparent 72%),#f0e9d8}
.mat.t-read .thumb{background:radial-gradient(110% 100% at 30% 20%,#f0e2c8,transparent 72%),#f0e9d8}
.mat .thumb .ico-big{font-size:2.4rem;opacity:.9}
.mat .thumb .p360{position:absolute;right:10px;bottom:10px;background:rgba(43,41,36,.82);color:#f4f1e6;
  font-size:.72rem;font-weight:700;border-radius:4px;padding:2px 9px;letter-spacing:.05em}
.mtags{display:flex;gap:6px;flex-wrap:wrap;margin-top:2px}
.tag.zhu{background:var(--zhu-weak);color:var(--zhu);border:1px solid rgba(184,67,47,.4)}

/* 360°全景预览弹层 */
.pano-modal{position:fixed;inset:0;z-index:90;background:rgba(24,20,12,.84);
  display:flex;align-items:center;justify-content:center;backdrop-filter:blur(3px)}
.pano-modal.hidden{display:none!important}
.pano-wrap{position:relative;width:min(1100px,94vw);height:min(660px,80vh);
  border-radius:14px;overflow:hidden;background:#141210;box-shadow:0 24px 70px rgba(0,0,0,.5)}
.pano-stage{position:absolute;inset:0}
.pano-stage canvas{display:block}
.pano-close{position:absolute;top:14px;right:14px;z-index:5;background:rgba(251,246,236,.94);
  color:var(--ink-1);border:1.5px solid var(--line-ink);border-radius:8px;padding:6px 15px;
  font-weight:700;cursor:pointer;font-family:inherit;font-size:.88rem}
.pano-close:hover{border-color:var(--zhu);color:var(--zhu)}
.pano-loading{position:absolute;inset:0;z-index:2;display:flex;align-items:center;
  justify-content:center;color:#f4f1e6;font-size:.98rem;letter-spacing:.05em}
.pano-tip{position:absolute;left:14px;top:16px;z-index:5;background:rgba(43,41,36,.78);color:#f4f1e6;
  font-size:.8rem;padding:6px 13px;border-radius:6px;pointer-events:none}


/* ============ 经折装工作台与书封 ============ */
.cover-page{position:fixed;inset:0;z-index:60;display:flex;align-items:center;justify-content:center;
  background:radial-gradient(120% 90% at 12% 6%,rgba(65,96,108,.06),transparent 55%),
    radial-gradient(100% 85% at 90% 94%,rgba(184,67,47,.05),transparent 58%),
    repeating-linear-gradient(0deg,rgba(43,41,36,.015) 0 1px,transparent 1px 3px),
    linear-gradient(160deg,#f7f2e7,#efe8d8);
  perspective:1600px;transform-origin:left center;
  transition:transform .9s cubic-bezier(.6,.05,.3,1),opacity .9s ease}
.cover-page.leave{transform:rotateY(-102deg);opacity:0;pointer-events:none}
.cover-book{width:min(560px,92vw);min-height:82vh;background:var(--paper-2);position:relative;border:1.5px solid var(--line-ink);
  border-radius:6px;box-shadow:14px 18px 46px rgba(62,52,30,.2),inset 0 0 60px rgba(62,52,30,.05);
  display:flex;flex-direction:column;align-items:center;justify-content:center;gap:20px;padding:34px 30px}
.cover-book::before{content:"";position:absolute;inset:14px;border:1px solid rgba(43,41,36,.22);pointer-events:none}
.c-spine{position:absolute;left:0;top:0;bottom:0;width:34px;background:linear-gradient(90deg,rgba(62,52,30,.10),transparent);border-right:1px solid var(--line-ink)}
.c-spine i{position:absolute;left:11px;width:12px;height:12px;border-radius:50%;border:1.5px solid rgba(43,41,36,.45)}
.c-spine i:nth-child(1){top:9%}.c-spine i:nth-child(2){top:29%}.c-spine i:nth-child(3){top:50%}
.c-spine i:nth-child(4){top:71%}.c-spine i:nth-child(5){top:91%}
.cover-title{writing-mode:vertical-rl;font-family:var(--kai);font-size:4.2rem;font-weight:700;letter-spacing:.32em;
  color:var(--ink-1);text-shadow:0 2px 10px rgba(62,52,30,.15)}
.cover-sub{writing-mode:vertical-rl;font-family:var(--kai);font-size:1rem;letter-spacing:.5em;color:var(--ink-2)}
.cover-seal{width:64px;height:64px;border:3px solid var(--zhu);border-radius:9px;color:var(--zhu);display:flex;align-items:center;
  justify-content:center;font-family:var(--kai);font-size:1.35rem;font-weight:700;line-height:1.2;text-align:center;
  transform:rotate(-4deg);box-shadow:inset 0 0 0 1.5px rgba(184,67,47,.35)}
.cover-login{width:min(340px,86%);background:rgba(251,248,240,.92);border:1.5px solid var(--line-ink);border-radius:12px;padding:20px 22px}
.cover-en{font-size:.74rem;letter-spacing:.22em;color:var(--ink-3)}

.scroll-head{display:flex;align-items:center;gap:14px;padding:12px max(26px,calc((100vw - 1332px)/2));
  background:rgba(251,248,240,.94);
  border-bottom:1.5px solid var(--line-ink);position:sticky;top:0;z-index:40;backdrop-filter:blur(8px)}
.scroll-head .brand{display:flex;align-items:center;gap:10px;font-family:var(--kai);font-size:1.25rem;font-weight:700;letter-spacing:.1em}
.scroll-head .brand .mark{width:38px;height:38px;border-radius:8px;background:var(--zhu);color:#fbf6ec;display:flex;
  align-items:center;justify-content:center;font-family:var(--kai);font-size:1.25rem;
  box-shadow:inset 0 0 0 2px rgba(251,246,236,.4),0 1px 0 var(--zhu-deep)}
.scroll-head .sub{color:var(--ink-3);font-size:.85rem}
.scroll-head .right{margin-left:auto;display:flex;align-items:center;gap:10px}
.scroll-head .right .ava{width:36px;height:36px;border-radius:50%;background:transparent;color:var(--ink-1);
  border:1.5px solid var(--ink-1);font-family:var(--kai);font-weight:700;display:flex;align-items:center;justify-content:center}
.scroll-head .right .nm{font-size:.92rem;font-weight:700}
.scroll-head .right .out{background:transparent;border:1.5px solid var(--line-ink);color:var(--ink-2);font-size:.8rem;
  cursor:pointer;padding:5px 12px;border-radius:8px}
.scroll-head .right .out:hover{border-color:var(--ink-1);color:var(--ink-1)}

.stage{flex:1;display:flex;gap:0;padding:22px 26px 10px;perspective:1500px;max-width:1280px;margin:0 auto;width:100%;position:relative}
/* 场景切换：卷面扫过 */
.stage::after{content:"";position:absolute;inset:0;z-index:9;pointer-events:none;opacity:0;
  background:linear-gradient(100deg,transparent 30%,rgba(43,41,36,.045) 46%,rgba(184,67,47,.05) 55%,transparent 72%)}
.stage.sw::after{animation:scrollSweep .6s ease}
@keyframes scrollSweep{0%{opacity:0;transform:translateX(-60%)}30%{opacity:1}100%{opacity:0;transform:translateX(60%)}}
/* 从封面进入：六折自下而上次第立起 */
.stage.enter .fold{animation:foldRise .7s cubic-bezier(.4,.1,.3,1) both}
.stage.enter .fold.open{animation-delay:.12s}
@keyframes foldRise{from{opacity:0;transform:translateY(26px)}to{opacity:1;transform:none}}
.fold{position:relative;background:var(--paper-2);border:1.5px solid var(--line-ink);border-radius:4px;overflow:hidden;
  cursor:pointer;transition:width .55s cubic-bezier(.55,.05,.3,1),transform .55s ease,box-shadow .55s ease;
  width:56px;min-width:56px;box-shadow:2px 3px 10px rgba(62,52,30,.10)}
.fold + .fold{margin-left:-1.5px}
.fold .spine-tab{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center;
  writing-mode:vertical-rl;font-family:var(--kai);font-size:1.05rem;letter-spacing:.35em;color:var(--ink-2);
  background:var(--paper-2);transition:opacity .25s;z-index:2}
.fold .spine-tab .num{writing-mode:horizontal-tb;font-size:.72rem;color:var(--ink-3);letter-spacing:.2em;margin-bottom:12px}
.fold.open{width:auto;flex:1;cursor:default;box-shadow:4px 8px 22px rgba(62,52,30,.12)}
.fold:not(.open):hover{transform:rotateY(-14deg) translateY(-4px);box-shadow:5px 9px 22px rgba(62,52,30,.18);z-index:5}
.fold .page{position:absolute;inset:0;opacity:0;pointer-events:none;overflow-y:auto;
  transform-origin:left center;transform:rotateY(-64deg);
  transition:transform .55s cubic-bezier(.4,.1,.3,1),opacity .45s ease}
.fold.open .page{opacity:1;pointer-events:auto;transform:rotateY(0);animation:foldIn .55s cubic-bezier(.4,.1,.3,1) both}
@keyframes foldIn{from{transform:rotateY(-64deg);opacity:.15}to{transform:rotateY(0);opacity:1}}
.fold.open .spine-tab{opacity:0;pointer-events:none}
.fold .page-inner{min-height:100%;padding:22px 26px 30px;display:flex;flex-direction:column}
.fold .ph{font-family:var(--kai);font-size:1.35rem;letter-spacing:.08em;display:flex;align-items:center;gap:10px;margin-bottom:14px}
.fold .ph::after{content:"";flex:1;height:1px;background:var(--line-ink)}
.fold .ph .yin{width:30px;height:30px;border:1.5px solid var(--zhu);border-radius:5px;color:var(--zhu);font-size:.8rem;
  display:flex;align-items:center;justify-content:center;font-weight:700;flex:none}
.fold .chat-card{height:calc(100vh - 250px);min-height:460px}
.scroll-foot{display:flex;align-items:center;justify-content:center;gap:12px;padding:8px 0 20px;color:var(--ink-3);font-size:.8rem}
.scroll-foot .seal{width:24px;height:24px;border:2px solid var(--zhu);border-radius:5px;color:var(--zhu);display:flex;
  align-items:center;justify-content:center;font-family:var(--kai);font-size:.6rem;font-weight:700;transform:rotate(-4deg)}
#foldNo{display:inline-block}
#foldNo.stamp{animation:stampIn .5s cubic-bezier(.2,1.6,.4,1)}
@keyframes stampIn{0%{transform:scale(1.7) rotate(-6deg);opacity:0}60%{opacity:1}100%{transform:scale(1) rotate(0)}}
@media (max-width:900px){
  .scroll-head{flex-wrap:wrap;padding:10px 14px}
  .stage{padding:14px 12px 8px;flex-wrap:wrap}
  .fold{min-width:46px;width:46px}
  .fold .spine-tab{font-size:.85rem;letter-spacing:.25em}
  .fold.open{width:100%;min-height:70vh}
  .fold .chat-card{height:70vh}
}

/* 班级 */
.class-card{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;border-radius:14px}
.code-chip{font-family:Consolas,monospace;font-size:1.35rem;font-weight:800;letter-spacing:.14em;
  color:var(--zhu);background:var(--zhu-weak);border:1.5px dashed rgba(184,67,47,.5);border-radius:9px;padding:6px 16px}
#lanBox{border-radius:14px}

@media (max-width:900px){
  .pc-top{flex-wrap:wrap;padding:10px 14px}
  .cnav{order:3;width:100%;overflow-x:auto}
  .main{padding:18px 14px 60px}
  .chat-card{height:calc(100vh - 230px)}
  .grid-l{grid-template-columns:1fr 1fr}
}

/* ============================================================
   大屏端（影院式暗色 + 玻璃拟态）
   ============================================================ */
body.screen{background:#070c11;color:#e7eef3;overflow-x:hidden}
body.screen::before{content:"";position:fixed;inset:-30%;z-index:-1;opacity:.5;pointer-events:none;
  background:radial-gradient(46% 38% at 22% 24%,rgba(28,120,84,.30),transparent 60%),
             radial-gradient(42% 36% at 80% 74%,rgba(38,88,140,.26),transparent 60%),
             radial-gradient(30% 26% at 62% 16%,rgba(190,130,52,.14),transparent 60%);
  background-size:170% 170%;animation:aurora 26s ease-in-out infinite}
.glass{background:rgba(15,24,34,.66);border:1px solid rgba(255,255,255,.10);border-radius:18px;backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px)}

.scr-top{display:flex;align-items:center;gap:18px;padding:14px 30px}
.scr-top .brand{font-size:1.22rem;font-weight:800;color:#8fe8bc;display:flex;align-items:center;gap:10px}
.scr-top .brand .mark{width:34px;height:34px;border-radius:11px;background:var(--brand-grad);display:flex;align-items:center;justify-content:center;box-shadow:0 4px 14px rgba(40,161,115,.4)}
.scr-top .lesson{color:#a9bdc2;font-size:.98rem}
.scr-top .sp{flex:1}
.btn.glassbtn{background:rgba(255,255,255,.08);color:#dcebe4;border:1px solid rgba(255,255,255,.14);box-shadow:none;backdrop-filter:blur(8px)}
.btn.glassbtn:hover{background:rgba(255,255,255,.15)}

/* 分段模式切换 */
.seg{display:inline-flex;gap:4px;padding:5px;border-radius:16px;position:relative;margin:10px 30px 14px}
.seg button{border:none;background:transparent;color:#9db4b0;font-size:.98rem;font-weight:600;padding:9px 20px;border-radius:12px;
  transition:all .2s ease;position:relative;z-index:1}
.seg button:hover{color:#e7eef3}
.seg button.on{color:#06231a;background:linear-gradient(135deg,#5ee0a4,#28a173);box-shadow:0 4px 16px rgba(40,161,115,.42)}
body.screen .pill{background:rgba(255,255,255,.08);color:#e3efe9;border-color:rgba(255,255,255,.18);max-width:280px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
body.screen .pill.on{background:linear-gradient(135deg,#5ee0a4,#28a173);color:#06231a;border-color:transparent;box-shadow:0 4px 14px rgba(40,161,115,.4)}

/* 全景舞台（仅大屏端） */
body.screen .stage-wrap{margin:0 30px;position:relative}
body.screen .stage{position:relative;height:calc(100vh - 300px);min-height:430px;border-radius:22px;overflow:hidden;background:#000;
  box-shadow:0 24px 60px rgba(0,0,0,.55),0 0 0 1px rgba(255,255,255,.07)}
body.screen .stage canvas{display:block;cursor:grab}
body.screen .stage canvas:active{cursor:grabbing}
body.screen .stage-hint{position:absolute;left:50%;bottom:16px;transform:translateX(-50%);background:rgba(8,14,20,.55);color:#c9dcd2;
  font-size:.86rem;padding:7px 18px;border-radius:999px;pointer-events:none;backdrop-filter:blur(6px);border:1px solid rgba(255,255,255,.08)}
body.screen .stage-tools{position:absolute;top:16px;right:16px;display:flex;flex-direction:column;gap:9px;z-index:5}
body.screen .tool{width:46px;height:46px;border-radius:14px;border:1px solid rgba(255,255,255,.14);background:rgba(10,18,26,.6);
  color:#dcebe4;font-size:1.15rem;display:flex;align-items:center;justify-content:center;cursor:pointer;
  backdrop-filter:blur(10px);transition:all .15s ease}
body.screen .tool:hover{background:rgba(40,161,115,.35);transform:scale(1.06)}
body.screen .tool.on{background:linear-gradient(135deg,#5ee0a4,#28a173);color:#06231a;border-color:transparent}
body.screen .wordcard{position:absolute;top:20px;left:50%;transform:translateX(-50%);max-width:78%;
  background:rgba(9,17,14,.72);border:1px solid rgba(110,227,173,.35);color:#fff;padding:16px 30px;border-radius:16px;
  font-size:1.5rem;text-align:center;backdrop-filter:blur(12px);box-shadow:0 10px 40px rgba(0,0,0,.5);animation:popIn .3s ease;z-index:4}
.wordcard .src{display:block;font-size:.85rem;color:#8fe8bc;margin-top:4px}

/* 音效坞 */
.dock{display:flex;align-items:center;gap:14px;flex-wrap:wrap;padding:13px 20px;margin-top:14px}
.dock .cap{color:#93aaa2;font-size:.88rem;font-weight:600;letter-spacing:.04em}
.layer{display:flex;align-items:center;gap:10px;padding:8px 8px 8px 16px;border-radius:999px;
  background:rgba(255,255,255,.05);border:1px solid rgba(255,255,255,.10);transition:all .2s ease}
.layer.on{background:rgba(40,161,115,.20);border-color:rgba(110,227,173,.5)}
.layer .nm{font-size:.92rem;color:#dcebe4;min-width:0;max-width:13em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.layer .lt{font-size:.7rem;color:#8fe8bc;background:rgba(110,227,173,.14);padding:1px 8px;border-radius:999px;flex:none}
.layer button.play{width:38px;height:38px;border-radius:50%;border:1px solid rgba(255,255,255,.16);background:rgba(255,255,255,.07);
  color:#e7eef3;font-size:.9rem;cursor:pointer;transition:all .15s ease;flex:none}
.layer button.play:hover{transform:scale(1.1)}
.layer.on button.play{background:linear-gradient(135deg,#5ee0a4,#28a173);color:#06231a;border-color:transparent}
.eq{display:inline-flex;align-items:flex-end;gap:2.5px;height:16px;width:16px;flex:none}
.eq i{width:3.5px;height:100%;border-radius:2px;background:#8fe8bc;transform-origin:bottom;transform:scaleY(.3)}
.layer.on .eq i{animation:eq .9s ease-in-out infinite}
.layer.on .eq i:nth-child(2){animation-delay:.22s}.layer.on .eq i:nth-child(3){animation-delay:.44s}
.layer.off .eq i{background:#5b6f68}
.layer input[type=range]{width:96px;accent-color:#28a173;padding:0;border:none;background:transparent;height:18px}
.layer .vv{font-size:.78rem;color:#8fe8bc;width:2.2em;text-align:center;font-variant-numeric:tabular-nums}

/* 步骤条 */
.stepper{display:flex;gap:12px;margin:14px 30px 8px}
.stepper .step{flex:1;min-width:0;padding:13px 16px;border-radius:16px;cursor:pointer;position:relative;
  background:rgba(15,24,34,.6);border:1px solid rgba(255,255,255,.09);backdrop-filter:blur(10px);transition:all .2s ease}
.stepper .step:hover{border-color:rgba(110,227,173,.4)}
.stepper .step .no{width:26px;height:26px;border-radius:9px;background:rgba(255,255,255,.08);color:#9db4b0;font-weight:700;
  display:inline-flex;align-items:center;justify-content:center;font-size:.85rem;margin-bottom:6px}
.stepper .step .tt{font-size:1rem;font-weight:700;color:#c9dcd2}
.stepper .step .dd{font-size:.8rem;color:#7f978e;margin-top:2px}
.stepper .step.on{background:linear-gradient(135deg,rgba(94,224,164,.16),rgba(40,161,115,.10));border-color:rgba(110,227,173,.55);box-shadow:0 6px 24px rgba(40,161,115,.22)}
.stepper .step.on .no{background:linear-gradient(135deg,#5ee0a4,#28a173);color:#06231a}
.stepper .step.on .tt{color:#fff}
.stepper .step.done .no{background:rgba(110,227,173,.2);color:#8fe8bc}
.timer{font-size:1.9rem;font-weight:800;color:#ffd98a;font-variant-numeric:tabular-nums;margin-top:4px}

/* 面板（朗读/音乐/采访） */
.panel{margin:6px 30px 30px;padding:24px 28px;animation:fadeUp .3s ease}
.panel h3{margin:0 0 6px;font-size:1.15rem;color:#fff}
.panel .sub{color:#93aaa2;font-size:.88rem;margin-bottom:14px}
body.screen table.tb{background:transparent;color:#dbe6e0}
body.screen table.tb th{background:rgba(255,255,255,.05);color:#93aaa2}
body.screen table.tb th,body.screen table.tb td{border-color:rgba(255,255,255,.09)}
body.screen table.tb tr:hover td{background:rgba(255,255,255,.04)}
body.screen input,body.screen select,body.screen textarea{background:rgba(255,255,255,.06);color:#e7eef3;border-color:rgba(255,255,255,.16)}
body.screen input:focus,body.screen select:focus,body.screen textarea:focus{border-color:#5ee0a4;box-shadow:0 0 0 4px rgba(94,224,164,.14)}
.readtext{font-size:1.42rem;line-height:2.1;background:rgba(255,255,255,.04);border:1px solid rgba(255,255,255,.09);
  border-radius:16px;padding:18px 22px;color:#f2f7f4}
.obs{margin-top:12px;padding:14px 18px;font-size:1.05rem;line-height:1.9}
.frame-list{font-size:1.18rem;line-height:2;color:#e7eef3}
.frame-list b{color:#8fe8bc}
.eval-box{border-left:4px solid #5ee0a4}

/* 大屏人物采访 */
.charlog{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:16px;padding:12px 4px}
.charrow{display:flex;gap:12px;max-width:88%;animation:fadeUp .25s ease}
.charrow.user{align-self:flex-end;flex-direction:row-reverse}
.charrow .ava{width:44px;height:44px;border-radius:15px;font-size:1.3rem}
.charrow .ava.role{background:linear-gradient(135deg,#e0a24e,#c07a2a);color:#fff}
.charrow .ava.me{background:rgba(255,255,255,.1)}
.charrow .bubble{font-size:1.22rem;padding:14px 20px;border-radius:18px;line-height:1.8}
.charrow.bot .bubble{background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.12);border-top-left-radius:6px}
.charrow.user .bubble{background:linear-gradient(135deg,#1f8a5e,#28a173);color:#fff;border-bottom-right-radius:6px}
.charname{color:#ffd98a;font-weight:700}
.charrow .bubble .demo-chip{display:inline-block;margin-left:10px;font-size:.66rem;color:#ffd98a;background:rgba(255,217,138,.12);border:1px solid rgba(255,217,138,.3);border-radius:999px;padding:1px 9px;vertical-align:3px}
.charrow .typing i{background:#ffd98a}
.char-note{color:#93aaa2;font-size:.9rem}
.charinput{display:flex;gap:12px;margin-top:14px}
.charinput input{flex:1;font-size:1.05rem}

/* ============================================================
   移动端 H5
   ============================================================ */
body.mobile{max-width:680px;margin:0 auto;min-height:100vh;background:#f2f5f1;padding-bottom:86px}
.mob-hero{position:relative;background:linear-gradient(150deg,#0f4d33 0%,#17714d 55%,#28a173 100%);color:#eaf6ee;
  padding:26px 22px 58px;border-radius:0 0 30px 30px;overflow:hidden}
.mob-hero::before{content:"";position:absolute;right:-46px;top:-46px;width:190px;height:190px;border-radius:50%;background:rgba(255,255,255,.09)}
.mob-hero::after{content:"";position:absolute;left:-30px;bottom:-64px;width:150px;height:150px;border-radius:50%;background:rgba(255,255,255,.07)}
.mob-hero .t{font-size:1.32rem;font-weight:800;display:flex;align-items:center;gap:9px}
.mob-hero .s{font-size:.86rem;opacity:.85;margin-top:3px}
.join-card{margin:-42px 16px 16px;position:relative;z-index:2}
.seg-mini{display:flex;gap:8px;margin-bottom:14px}
.seg-mini .pill{flex:1;text-align:center}
.tabbar{position:fixed;bottom:0;left:50%;transform:translateX(-50%);width:100%;max-width:680px;z-index:40;
  display:flex;padding:8px 10px calc(8px + env(safe-area-inset-bottom));
  background:rgba(255,255,255,.88);backdrop-filter:blur(16px);border-top:1px solid var(--line)}
.tabbar a{flex:1;display:flex;flex-direction:column;align-items:center;gap:2px;padding:6px 0;border-radius:14px;
  color:#8b9a91;font-size:.74rem;font-weight:600;cursor:pointer;transition:color .15s ease}
.tabbar a .ico{font-size:1.35rem;filter:grayscale(.4);transition:filter .15s ease,transform .15s ease}
.tabbar a.on{color:var(--brand)}
.tabbar a.on .ico{filter:none;transform:translateY(-2px) scale(1.12)}
.mob-body{padding:0 16px}
.pkg-card{background:#fff;border:1px solid var(--line);border-radius:20px;overflow:hidden;margin-bottom:14px;box-shadow:var(--sh-sm);
  transition:transform .18s ease,box-shadow .18s ease;animation:fadeUp .28s ease}
.pkg-card:active{transform:scale(.985)}
.pkg-card .cover{height:132px;background:#101820 center/cover;position:relative;display:flex;align-items:flex-end;padding:14px}
.pkg-card .cover .grad{position:absolute;inset:0;background:linear-gradient(180deg,rgba(0,0,0,.05) 30%,rgba(0,0,0,.62))}
.pkg-card .cover h3{position:relative;color:#fff;font-size:1.12rem;margin:0;text-shadow:0 2px 8px rgba(0,0,0,.5)}
.pkg-card .cover .ct{position:absolute;top:12px;left:12px;background:rgba(9,17,14,.66);color:#c9f2dc;font-size:.72rem;font-weight:700;
  padding:3px 11px;border-radius:999px;backdrop-filter:blur(4px)}
.pkg-card .meta{display:flex;align-items:center;gap:8px;padding:12px 16px;color:var(--muted);font-size:.84rem}
.pkg-card .cta{margin:0 16px 16px;width:calc(100% - 32px)}
.pano-lite{height:240px;border-radius:18px;overflow:hidden;background:#000;position:relative}
.pano-hint-m{position:absolute;left:50%;bottom:12px;transform:translateX(-50%);background:rgba(8,14,20,.55);color:#c9dcd2;
  font-size:.75rem;padding:5px 14px;border-radius:999px;backdrop-filter:blur(6px);pointer-events:none}
.qcard{margin:16px 0;padding:16px;background:linear-gradient(160deg,#eaf5ee,#f6faf6);border:1px solid #d5e8db;border-radius:18px}
.qcard .q{font-weight:700;margin-bottom:10px;display:flex;gap:8px}
.qcard .q .no{flex:none;width:24px;height:24px;border-radius:9px;background:var(--brand-grad);color:#fff;font-size:.8rem;
  display:flex;align-items:center;justify-content:center}
.audio-rec{display:flex;align-items:center;gap:10px;margin-top:10px}
.rec-btn.recording{animation:pulseRing 1.4s infinite;background:#e8645b}
.mcard{background:#fff;border:1px solid var(--line);border-radius:20px;padding:16px;margin-bottom:14px;box-shadow:var(--sh-sm);animation:fadeUp .28s ease}
.mcard h3{font-size:1.05rem;margin:0 0 6px}
.stars .pill{font-size:.95rem}
.fab{position:fixed;right:18px;bottom:104px;width:56px;height:56px;border-radius:50%;border:none;background:var(--brand-grad);color:#fff;
  font-size:1.5rem;display:flex;align-items:center;justify-content:center;z-index:50;animation:fabPulse 2.6s ease-in-out infinite;box-shadow:0 8px 22px rgba(23,113,77,.42)}
.fab:active{transform:scale(.94)}
.sheet{position:fixed;left:0;right:0;bottom:0;max-width:680px;margin:0 auto;height:74vh;background:#fff;border-radius:26px 26px 0 0;
  box-shadow:0 -12px 44px rgba(23,39,32,.28);z-index:60;display:flex;flex-direction:column;padding:16px 16px calc(16px + env(safe-area-inset-bottom));
  animation:sheetUp .3s cubic-bezier(.2,.9,.3,1)}
@keyframes sheetUp{from{transform:translateY(60%);opacity:.4}to{transform:none;opacity:1}}
.sheet .grab{width:44px;height:5px;border-radius:5px;background:#dfe6df;margin:0 auto 10px}
.sheet .log{flex:1;overflow-y:auto;display:flex;flex-direction:column;gap:10px;padding:6px 2px}
.sheet .msg{max-width:88%;border-radius:16px;padding:10px 14px;font-size:.95rem;white-space:pre-wrap}
.sheet .msg.user{align-self:flex-end;background:var(--brand-grad);color:#fff;border-bottom-right-radius:5px}
.sheet .msg.bot{align-self:flex-start;background:#f0f4ef;border:1px solid var(--line);border-top-left-radius:5px}

@media (max-width:760px){
  .grid2{grid-template-columns:1fr}
  .app-shell{flex-direction:column}
  .sidebar{width:100%;flex-direction:row;align-items:center;padding:10px 14px}
  .sidebar nav{flex-direction:row;overflow-x:auto;margin:0 8px}
  .nav-item{padding:8px 12px;white-space:nowrap}
  .nav-item.on::before{display:none}
  .sidebar .foot{border:none;padding:0}
  .sidebar .who .nm{display:none}
  .main{padding:18px 16px 60px}
  .chat-card{height:calc(100vh - 190px)}
}

/* ================================================================
   移动端 · 纸墨翻书（书函 / 书架 / 每课一书 / 目录）
   ================================================================ */
body.mobile{
  --paper:#f6f1e6; --paper-2:#fbf8f0; --ink-1:#2b2924; --ink-2:#57534a; --ink-3:#8d8676;
  --zhu:#b8432f; --zhu-deep:#8f3020; --zhu-weak:rgba(184,67,47,.08);
  --dai:#41606c; --line-ink:#d9d2c0;
  --kai:"KaiTi","STKaiti","DFKai-SB","Kaiti SC",serif;
  max-width:none; margin:0; padding:0; min-height:100dvh; background:#2a261e; overflow:hidden;
  color:var(--ink-1);
}
body.mobile .mstage{
  position:relative; width:100%; max-width:680px; margin:0 auto; height:100dvh; overflow:hidden;
  background:repeating-linear-gradient(0deg,rgba(43,41,36,.015) 0 1px,transparent 1px 3px),
    repeating-linear-gradient(90deg,rgba(43,41,36,.012) 0 1px,transparent 1px 4px),
    radial-gradient(120% 90% at 12% 6%,rgba(65,96,108,.05),transparent 55%),
    var(--paper);
}
body.mobile .hidden{display:none!important}
body.mobile .btn{background:var(--zhu);border:1.5px solid var(--zhu-deep);color:#fbf6ec;box-shadow:0 2px 0 var(--zhu-deep)}
body.mobile .btn.light, body.mobile .btn.ghost{background:transparent;color:var(--ink-1);border-color:var(--line-ink);box-shadow:none}
body.mobile input, body.mobile select, body.mobile textarea{background:var(--paper-2);border-color:var(--line-ink);color:var(--ink-1)}
body.mobile .pill{background:transparent;border-color:var(--line-ink);color:var(--ink-2)}
body.mobile .pill.on{background:var(--zhu);border-color:var(--zhu-deep);color:#fbf6ec}
body.mobile .muted{color:var(--ink-3)}
body.mobile .tag{background:#ece5d2;color:var(--ink-2);border:none}
body.mobile .tag.r{background:var(--zhu-weak);color:var(--zhu);border:1px solid rgba(184,67,47,.4)}
body.mobile .tag.gray{background:#ece5d2;color:var(--ink-3)}
body.mobile .mcard{background:var(--paper-2);border:1.5px solid var(--line-ink);box-shadow:none}
body.mobile .kbd{background:#ece5d2;border-color:var(--line-ink);color:var(--ink-2)}
body.mobile .mbtn{font-family:var(--kai);letter-spacing:.18em;text-indent:.18em}
body.mobile .fab{background:var(--zhu);box-shadow:0 8px 22px rgba(143,48,32,.4);animation:none}
body.mobile .sheet{background:var(--paper-2);box-shadow:0 -12px 44px rgba(0,0,0,.5)}
body.mobile .sheet .msg.user{background:var(--zhu)}
body.mobile .sheet .msg.bot{background:#f0ead9;border-color:var(--line-ink)}
body.mobile .rec-btn.recording{animation:pulseRing 1.4s infinite;background:var(--zhu)}

/* ---------- 书函（加入班级） ---------- */
.m-join{display:flex;align-items:center;justify-content:center;padding:22px}
.join-paper{width:100%;max-width:430px;background:var(--paper-2);border:1.5px solid var(--line-ink);border-radius:16px;
  padding:28px 24px;box-shadow:0 16px 44px rgba(0,0,0,.4);position:relative}
.join-paper::before{content:"";position:absolute;left:12px;top:14px;bottom:14px;width:5px;border-radius:4px;
  background:repeating-linear-gradient(to bottom,#c9bfa6 0 8px,transparent 8px 14px)}
.join-head{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:6px;padding-left:8px}
.join-title{writing-mode:vertical-rl;font-family:var(--kai);font-size:2.7rem;font-weight:700;letter-spacing:.28em;color:var(--ink-1)}
.join-seal{width:54px;height:54px;border:3px solid var(--zhu);border-radius:9px;color:var(--zhu);display:flex;align-items:center;justify-content:center;
  font-family:var(--kai);font-size:1.05rem;font-weight:700;line-height:1.25;text-align:center;transform:rotate(-4deg);
  box-shadow:inset 0 0 0 1.5px rgba(184,67,47,.35)}
.join-sub{color:var(--ink-3);font-size:.86rem;margin:2px 0 16px;padding-left:8px}
.join-paper .f{color:var(--ink-2)}

/* ---------- 书架 ---------- */
.m-shelf{display:flex;flex-direction:column}
.m-shelf-head{display:flex;align-items:center;gap:11px;padding:calc(14px + env(safe-area-inset-top)) 18px 11px;
  border-bottom:1.5px solid var(--line-ink);background:rgba(251,248,240,.94)}
.m-shelf-head .head-seal{width:38px;height:38px;border:2.5px solid var(--zhu);border-radius:7px;color:var(--zhu);
  font-family:var(--kai);font-size:1.25rem;font-weight:700;display:flex;align-items:center;justify-content:center;transform:rotate(-3deg);flex:none}
.m-shelf-head .head-t{flex:1;min-width:0;line-height:1.25}
.m-shelf-head .head-t b{font-family:var(--kai);font-size:1.22rem;letter-spacing:.14em;color:var(--ink-1)}
.m-shelf-head .head-t i{display:block;font-style:normal;color:var(--ink-3);font-size:.72rem;letter-spacing:.08em}
.m-shelf-head .who{color:var(--ink-2);font-size:.78rem;border:1px solid var(--line-ink);border-radius:999px;padding:3px 10px;background:var(--paper-2)}
.m-tabs{display:flex;gap:8px;padding:11px 18px 0}
.m-tabs a{flex:1;text-align:center;padding:8px 0;border:1.5px solid var(--line-ink);border-radius:10px;background:var(--paper-2);
  color:var(--ink-2);font-family:var(--kai);font-size:.95rem;letter-spacing:.1em;cursor:pointer}
.m-tabs a .tico{margin-right:4px}
.m-tabs a.on{background:var(--zhu);border-color:var(--zhu-deep);color:#fbf6ec;box-shadow:0 2px 0 var(--zhu-deep)}
.m-body{flex:1;overflow-y:auto;-webkit-overflow-scrolling:touch;padding:16px 18px calc(26px + env(safe-area-inset-bottom))}
.bookcard{display:flex;gap:14px;background:var(--paper-2);border:1.5px solid var(--line-ink);border-radius:14px;padding:14px;
  margin-bottom:14px;cursor:pointer;animation:fadeUp .3s ease both;box-shadow:0 3px 12px rgba(62,52,30,.1)}
.bookcard:active{transform:scale(.985)}
.bc-cover{position:relative;flex:none;width:92px;height:130px;border-radius:5px 8px 8px 5px;background:#8d8676 center/cover;
  box-shadow:2px 3px 8px rgba(0,0,0,.3);overflow:hidden;display:flex;align-items:center;justify-content:center}
.bc-cover::after{content:"";position:absolute;inset:0;background:linear-gradient(180deg,rgba(43,41,36,.15),rgba(43,41,36,.42))}
.bc-spine{position:absolute;left:0;top:0;bottom:0;width:7px;background:rgba(43,41,36,.5);z-index:2}
.bc-title{position:relative;z-index:3;writing-mode:vertical-rl;font-family:var(--kai);color:#f6f1e6;font-size:1.06rem;
  letter-spacing:.24em;text-shadow:0 1px 6px rgba(0,0,0,.55);max-height:112px;overflow:hidden}
.bc-done{position:absolute;right:5px;top:5px;z-index:4;background:var(--zhu);color:#fbf6ec;font-size:.62rem;
  padding:2px 6px;border-radius:4px;transform:rotate(-6deg);letter-spacing:.1em}
.bc-info{flex:1;min-width:0;display:flex;flex-direction:column}
.bc-type{color:var(--ink-3);font-size:.74rem;letter-spacing:.06em}
.bc-type i{margin:0 5px;font-style:normal}
.bc-info h3{font-family:var(--kai);font-size:1.18rem;letter-spacing:.06em;color:var(--ink-1);margin:3px 0 5px}
.bc-desc{color:var(--ink-3);font-size:.78rem;line-height:1.6;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.bc-meta{display:flex;flex-wrap:wrap;gap:6px;margin-top:8px}
.bc-meta .tag{font-size:.68rem;padding:2px 8px;border-radius:4px}
.bc-open{margin-top:auto;align-self:flex-start;padding:7px 20px;font-size:.86rem;border-radius:8px}

/* ---------- 翻书舞台 ---------- */
.m-book{perspective:1600px}
.book-back{position:absolute;top:calc(10px + env(safe-area-inset-top));left:12px;z-index:46;padding:7px 14px 7px 10px;
  background:rgba(251,248,240,.94);border:1.5px solid var(--line-ink);border-radius:999px;color:var(--ink-2);font-size:.82rem}
.toc-ribbon{position:absolute;top:0;right:16px;z-index:46;writing-mode:vertical-rl;background:var(--zhu);color:#fbf6ec;
  padding:12px 7px 16px;border-radius:0 0 8px 8px;font-family:var(--kai);font-size:.95rem;letter-spacing:.3em;
  box-shadow:0 3px 10px rgba(0,0,0,.3);border:none;cursor:pointer}
.mb-cover{position:absolute;inset:0;z-index:40;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:18px;
  transition:transform .85s cubic-bezier(.6,.05,.3,1),opacity .85s;transform-origin:left center;
  border-right:6px solid rgba(62,52,30,.18)}
.mb-cover.leave{transform:rotateY(-105deg);opacity:0;pointer-events:none}
.mb-cover .cover-tag{writing-mode:vertical-rl;font-size:.78rem;letter-spacing:.5em;color:var(--ink-3)}
.mb-cover .cover-title{writing-mode:vertical-rl;font-family:var(--kai);font-size:3.4rem;font-weight:700;letter-spacing:.24em;
  color:var(--ink-1);text-shadow:0 2px 10px rgba(62,52,30,.18);max-height:46vh;overflow:hidden}
.mb-cover .cover-sub{writing-mode:vertical-rl;font-family:var(--kai);font-size:.92rem;letter-spacing:.4em;color:var(--ink-2)}
.mb-cover .cover-seal{width:58px;height:58px;border:3px solid var(--zhu);border-radius:9px;color:var(--zhu);display:flex;align-items:center;justify-content:center;
  font-family:var(--kai);font-size:1.15rem;font-weight:700;line-height:1.25;text-align:center;transform:rotate(-4deg);
  box-shadow:inset 0 0 0 1.5px rgba(184,67,47,.35)}
.open-btn{padding:11px 38px;background:var(--zhu);color:#fbf6ec;border:1.5px solid var(--zhu-deep);border-radius:9px;
  font-family:var(--kai);font-size:1rem;font-weight:700;letter-spacing:.3em;text-indent:.3em;box-shadow:0 2px 0 var(--zhu-deep);cursor:pointer}
.open-btn:active{transform:translateY(2px);box-shadow:none}

.mb-page{position:absolute;inset:0;background:var(--paper);backface-visibility:hidden;display:flex;flex-direction:column;
  transform-origin:left center;transition:transform .55s cubic-bezier(.5,.05,.3,1),opacity .55s}
.mb-page.active{transform:rotateY(0);opacity:1;z-index:10}
.mb-page.stacked{transform:rotateY(8deg) translateX(12px);opacity:0;z-index:5;pointer-events:none}
.mb-page.flipped{transform:rotateY(-112deg);opacity:.15;z-index:12;pointer-events:none}
.mb-page .page-inner{flex:1;display:flex;flex-direction:column;padding:calc(20px + env(safe-area-inset-top)) 22px 78px;overflow-y:auto;-webkit-overflow-scrolling:touch}
.ph{font-family:var(--kai);font-size:1.32rem;letter-spacing:.1em;display:flex;align-items:center;gap:10px;color:var(--ink-1)}
.ph::after{content:"";flex:1;height:1px;background:var(--line-ink)}
.ph .yin, .toc-item .yin{width:30px;height:30px;border:1.5px solid var(--zhu);border-radius:5px;color:var(--zhu);font-size:.8rem;
  display:flex;align-items:center;justify-content:center;font-weight:700;flex:none;font-family:var(--kai)}
.sub{color:var(--ink-3);font-size:.8rem;margin:6px 0 14px}
.flyleaf{flex:1;display:flex;align-items:center;justify-content:center;gap:22px;padding:10px 0}
.fly-title{writing-mode:vertical-rl;font-family:var(--kai);font-size:2.6rem;font-weight:700;letter-spacing:.26em;
  background:rgba(251,248,240,.9);border:1px solid rgba(43,41,36,.25);border-radius:8px;padding:16px 9px;color:var(--ink-1)}
.fly-meta{writing-mode:vertical-rl;font-size:.84rem;letter-spacing:.32em;color:var(--ink-2);line-height:2}
.tagline{display:flex;gap:6px;justify-content:center;margin-top:14px}
.tagline .tag{font-size:.72rem;padding:2px 10px;border-radius:4px}
.pano-box{position:relative;height:42vh;border:1.5px solid var(--line-ink);border-radius:12px;overflow:hidden;background:#141210;flex:none;margin-top:4px}
.pano-hint{position:absolute;left:10px;top:10px;z-index:3;background:rgba(43,41,36,.78);color:#f4f1e6;font-size:.72rem;padding:5px 11px;border-radius:6px;pointer-events:none}
.pano-box canvas{display:block}
.audio-card{margin-top:12px;display:flex;align-items:center;gap:12px;border:1.5px solid var(--line-ink);border-radius:11px;padding:11px 13px;background:var(--paper-2)}
.audio-card .ic{width:40px;height:40px;border-radius:50%;background:var(--dai);color:#f4f1e6;display:flex;align-items:center;justify-content:center;font-size:1.1rem;flex:none}
.audio-card b{font-size:.92rem;color:var(--ink-1)}
.audio-card .muted{font-size:.74rem}
.verse{margin-top:8px;display:flex;flex-direction:column;gap:13px}
.vline{font-family:var(--kai);font-size:1.55rem;letter-spacing:.3em;color:var(--ink-1);
  border-bottom:1px dashed var(--line-ink);padding-bottom:9px;animation:vlineIn .5s ease both}
.vline:nth-child(2){animation-delay:.12s}.vline:nth-child(3){animation-delay:.24s}.vline:nth-child(4){animation-delay:.36s}
@keyframes vlineIn{from{opacity:0;transform:translateX(14px)}to{opacity:1;transform:none}}
.voice{display:flex;gap:10px;margin-top:14px}
.voice .btn{flex:1;padding:10px 0;border-radius:9px}
.note{font-size:.75rem;color:var(--ink-3);margin-top:10px;line-height:1.75}
.note b{color:var(--zhu)}
.task{flex:1;display:flex;flex-direction:column;gap:13px;justify-content:center}
.task-card{border:1.5px solid var(--line-ink);border-radius:12px;padding:14px 15px;background:var(--paper-2)}
.task-card .q{font-size:.93rem;line-height:1.75;color:var(--ink-1)}
.audio-rec{display:flex;align-items:center;gap:10px}
.endpage{flex:1;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:16px}
.medal{width:112px;height:112px;border-radius:50%;border:3px solid var(--zhu);display:flex;flex-direction:column;align-items:center;justify-content:center;
  color:var(--zhu);font-family:var(--kai);box-shadow:inset 0 0 0 2px rgba(184,67,47,.3),0 6px 18px rgba(62,52,30,.18);transform:rotate(-3deg)}
.medal b{font-size:1.5rem}.medal span{font-size:.7rem;letter-spacing:.2em;margin-top:4px}

.mb-foot{position:absolute;left:0;right:0;bottom:0;z-index:30;display:flex;align-items:center;justify-content:space-between;
  padding:10px 16px calc(10px + env(safe-area-inset-bottom));border-top:1.5px solid var(--line-ink);background:rgba(251,248,240,.96)}
.dots{display:flex;gap:6px;justify-content:center;flex-wrap:wrap;max-width:46vw}
.dot{width:7px;height:7px;border-radius:50%;background:#c9bfa6;transition:all .25s}
.dot.on{background:var(--zhu);transform:scale(1.25)}
.pageno{font-size:.72rem;color:var(--ink-2);letter-spacing:.08em;margin-top:3px;text-align:center}
.pageno .seal-mini{display:inline-block;width:19px;height:19px;border:1.5px solid var(--zhu);border-radius:4px;color:var(--zhu);
  font-size:.58rem;text-align:center;line-height:17px;margin-right:5px;vertical-align:-4px;transform:rotate(-4deg)}
.navbtn{width:40px;height:40px;border-radius:50%;border:1.5px solid var(--line-ink);background:var(--paper-2);color:var(--ink-2);font-size:1.02rem;flex:none}
.navbtn:active{background:#ece5d2}
.navbtn.on{background:var(--zhu);color:#fbf6ec;border-color:var(--zhu-deep)}
.mb-tip{position:absolute;top:calc(14px + env(safe-area-inset-top));left:50%;transform:translateX(-50%);z-index:35;
  background:rgba(43,41,36,.82);color:#f4f1e6;font-size:.72rem;padding:7px 16px;border-radius:999px;pointer-events:none;white-space:nowrap}

/* ---------- 目录（页内 + 抽屉） ---------- */
.toc-item{display:flex;align-items:center;gap:12px;padding:12px 8px;border-bottom:1px dashed var(--line-ink);cursor:pointer;border-radius:8px}
.toc-item:active{background:var(--zhu-weak)}
.toc-item b{font-family:var(--kai);font-size:1.04rem;color:var(--ink-1);letter-spacing:.04em;display:block}
.toc-item .tdesc{color:var(--ink-3);font-size:.74rem;margin-top:2px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.toc-item .tp{flex:none;color:var(--ink-3);font-size:.7rem;letter-spacing:.05em}
.toc-item.on{background:var(--zhu-weak)}
.toc-item.on .yin{background:var(--zhu);color:#fbf6ec;border-color:var(--zhu-deep)}
.mb-toc{position:absolute;left:0;right:0;bottom:0;z-index:48;background:var(--paper-2);border-top:2px solid var(--zhu);
  border-radius:18px 18px 0 0;max-height:70%;overflow-y:auto;-webkit-overflow-scrolling:touch;
  padding:16px 16px calc(20px + env(safe-area-inset-bottom));transform:translateY(105%);transition:transform .32s cubic-bezier(.2,.9,.3,1);
  box-shadow:0 -10px 34px rgba(0,0,0,.35)}
.mb-toc.open{transform:none}
.mb-toc-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:6px}
.mb-toc-head b{font-family:var(--kai);font-size:1.25rem;letter-spacing:.5em;color:var(--ink-1)}

/* 高瘦屏与极小屏微调 */
@media (max-width:360px){
  .bc-cover{width:80px;height:114px}
  .mb-cover .cover-title{font-size:2.7rem}
  .vline{font-size:1.35rem;letter-spacing:.22em}
}