/* 呗呵在线 · 教材阅读 —— 品牌色：深蓝 #1B3A5C / 赤褐 #B45F4D / 金 #C9A96A */
:root{
  --navy:#1B3A5C; --navy2:#26496F; --rust:#B45F4D; --gold:#C9A96A;
  --bg:#F5F3EE; --card:#fff; --line:#E8E2D6; --ink:#2B3644; --muted:#98A2AE;
  --fs:16px;
}
*{box-sizing:border-box;-webkit-tap-highlight-color:transparent}
html,body{margin:0;padding:0}
body{background:#F5F3EE;background:var(--bg);color:#2B3644;color:var(--ink);
  font-family:"PingFang SC","Microsoft YaHei",sans-serif;font-size:16px;font-size:var(--fs)}
button{font-family:inherit;cursor:pointer}
input{font-family:inherit}
[hidden]{display:none!important}

/* ---------- 登录 ---------- */
#view-login{min-height:100vh;display:flex;flex-direction:column}
.login-hero{background:linear-gradient(135deg,#1B3A5C,#26496F);background:linear-gradient(135deg,var(--navy),var(--navy2));
  color:#fff;padding:64px 24px 46px;text-align:center}
.login-logo{font-size:30px;font-weight:800;letter-spacing:4px}
.login-sub{margin-top:8px;font-size:14px;color:#C9A96A;color:var(--gold);letter-spacing:6px}
.login-card{background:#fff;background:var(--card);margin:-24px 20px 0;border-radius:16px;
  padding:26px 22px;box-shadow:0 4px 18px rgba(43,54,68,.10)}
.login-card label,.panel-narrow label{display:block;font-size:13px;color:#98A2AE;color:var(--muted);margin:14px 0 6px}
.login-card input,.panel-narrow input{width:100%;border:1.5px solid #E8E2D6;border:1.5px solid var(--line);border-radius:10px;
  padding:12px 14px;font-size:16px;outline:none}
.login-card input:focus,.panel-narrow input:focus{border-color:#C9A96A;border-color:var(--gold)}
.btn-primary{width:100%;margin-top:22px;background:#1B3A5C;background:var(--navy);color:#fff;border:0;
  border-radius:12px;padding:14px;font-size:16px;font-weight:700;letter-spacing:4px}
.btn-primary:active{background:#26496F;background:var(--navy2)}
.login-tip{margin-top:12px;font-size:12.5px;color:#B45F4D;color:var(--rust);min-height:18px;text-align:center}
.login-demo{margin-top:14px;text-align:center;font-size:12px;color:#98A2AE;color:var(--muted);
  background:#F8F6F0;border-radius:8px;padding:8px}
.login-foot{margin-top:auto;padding:28px 0 20px;text-align:center;font-size:11px;color:#B6AE9F}

/* ---------- 窄面板（改密码） ---------- */
.panel-narrow{background:#fff;background:var(--card);margin:60px 20px;border-radius:16px;
  padding:26px 22px;box-shadow:0 4px 18px rgba(43,54,68,.10)}
.panel-narrow h2{margin:0 0 8px;color:#1B3A5C;color:var(--navy);font-size:20px}
.muted{color:#98A2AE;color:var(--muted);font-size:13px;line-height:1.7;margin:0 0 6px}

/* ---------- 顶栏 ---------- */
.topbar{position:sticky;top:0;z-index:20;background:linear-gradient(90deg,#1B3A5C,#26496F);background:linear-gradient(90deg,var(--navy),var(--navy2));
  color:#fff;padding:14px 16px;display:flex;align-items:center;gap:10px}
.topbar-title{font-size:18px;font-weight:800;letter-spacing:2px;flex:1}
.topbar-user{font-size:12px;color:#C9A96A;color:var(--gold)}
.iconbtn{background:rgba(255,255,255,.14);color:#fff;border:0;border-radius:9px;
  width:36px;height:36px;font-size:20px;line-height:1}
.rd-title{flex:1;font-size:14.5px;font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}

/* ---------- 书架 ---------- */
.shelf-list{padding:16px;display:flex;flex-direction:column;gap:14px;max-width:720px;margin:0 auto}
.book-card{background:#fff;background:var(--card);border:1px solid #EFEAE0;border-radius:16px;
  padding:18px;box-shadow:0 2px 10px rgba(43,54,68,.06)}
.book-head{display:flex;align-items:center;gap:12px}
.book-badge{background:#1B3A5C;background:var(--navy);color:#fff;font-size:12px;font-weight:700;
  border-radius:8px;padding:5px 10px;white-space:nowrap}
.book-name{font-size:17px;font-weight:800;color:#1B3A5C;color:var(--navy)}
.book-sub{font-size:12px;color:#98A2AE;color:var(--muted);margin-top:2px}
.chap-list{margin-top:14px;border-top:1px dashed #E8E2D6;border-top:1px dashed var(--line)}
.chap-item{display:flex;align-items:center;gap:10px;padding:12px 4px;
  border-bottom:1px dashed #E8E2D6;
  border-bottom:1px dashed var(--line);font-size:14.5px}
.chap-item:last-child{border-bottom:0}
.chap-item .dot{width:7px;height:7px;border-radius:50%;background:#C9A96A;background:var(--gold);flex:none}
.chap-item .st{margin-left:auto;font-size:11.5px;color:#98A2AE;color:var(--muted)}
.chap-item.openable{color:#1B3A5C;color:var(--navy);font-weight:700}
.chap-item.openable .st{color:#B45F4D;color:var(--rust)}
.chap-item.locked{opacity:.55}

/* ---------- 阅读器工具条 ---------- */
.rd-tools{position:sticky;top:64px;z-index:15;display:grid;
  grid-template-columns:repeat(4,minmax(0,1fr));gap:6px;padding:10px 12px;
  background:rgba(245,243,238,.96);backdrop-filter:blur(4px)}
.toolbtn{min-width:0;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
  background:#fff;
  background:var(--card);border:1.5px solid #E8E2D6;border:1.5px solid var(--line);border-radius:10px;
  padding:9px 2px;font-size:12.5px;color:#1B3A5C;color:var(--navy);font-weight:700}
.toolbtn.play{background:#B45F4D;background:var(--rust);color:#fff;border-color:#B45F4D;border-color:var(--rust)}
.toolbtn.play.playing{background:#1B3A5C;background:var(--navy)}

/* ---------- 页签 ---------- */
.rd-tabs{background:#fff;background:var(--card);border-bottom:1px solid #EFEAE0;
  position:sticky;top:113px;z-index:15}
.rd-tabs-in{display:flex;overflow-x:auto}
.rd-tabs button{flex:none;border:0;background:none;padding:12px 16px;font-size:13.5px;
  color:#98A2AE;
  color:var(--muted);border-bottom:2.5px solid transparent}
.rd-tabs button.on{color:#B45F4D;color:var(--rust);font-weight:800;border-bottom-color:#B45F4D;border-bottom-color:var(--rust)}

/* ---------- 正文 ---------- */
.rd-body{max-width:720px;margin:0 auto;padding:20px 18px 80px;line-height:1.9}
.rd-body .sec-anchor{scroll-margin-top:170px}
.bk-intro{background:#FBF9F4;border-left:4px solid #C9A96A;border-left:4px solid var(--gold);border-radius:0 10px 10px 0;
  padding:12px 15px;font-size:14px;color:#5A6A7A;margin:14px 0}
.bk-h2{font-size:17px;color:#1B3A5C;color:var(--navy);margin:26px 0 10px;padding-left:11px;
  border-left:4px solid #B45F4D;
  border-left:4px solid var(--rust);font-weight:800}
.bk-sub{font-size:15px;color:#B45F4D;color:var(--rust);font-weight:700;margin:18px 0 8px}
.bk-p{margin:10px 0;text-align:justify}
.bk-std{background:#FDF6EC;border:1px solid #F0E3C8;border-radius:12px;padding:13px 15px;
  margin:14px 0;font-size:13.5px;color:#6B5B3E;line-height:1.85}
.bk-std .std-line{margin:4px 0}
.bk-std .std-line:first-child{font-weight:800;color:#B45F4D;color:var(--rust)}
.bk-ul{margin:10px 0;padding:0;list-style:none}
.bk-ul li{position:relative;padding-left:20px;margin:8px 0;text-align:justify}
.bk-ul li::before{content:"";position:absolute;left:4px;top:.75em;width:6px;height:6px;
  border-radius:50%;background:#C9A96A;background:var(--gold)}
.bk-note{background:#FDF3F0;border:1px solid #F0D5CC;border-left:4px solid #B45F4D;border-left:4px solid var(--rust);
  border-radius:0 10px 10px 0;padding:12px 15px;font-size:13.5px;color:#7C3A2C;margin:14px 0}
.bk-summ{background:#EFF4FA;border:1px solid #D6E2F0;border-radius:12px;padding:13px 15px;
  margin:16px 0;font-size:14px;color:#27415E}
.bk-table{width:100%;border-collapse:collapse;margin:14px 0;font-size:13.5px}
.bk-table th{background:#1B3A5C;background:var(--navy);color:#fff;padding:9px 10px;text-align:left;font-weight:700}
.bk-table td{border:1px solid #E8E2D6;border:1px solid var(--line);padding:9px 10px;vertical-align:top}
.bk-table tr:nth-child(even) td{background:#FBF9F4}
.sec-title{font-size:19px;font-weight:800;color:#1B3A5C;color:var(--navy);margin:34px 0 6px;
  padding-bottom:8px;border-bottom:2px solid #C9A96A;border-bottom:2px solid var(--gold)}
.sec-title:first-child{margin-top:6px}

/* 术语表 */
.term-row{display:flex;gap:12px;padding:10px 2px;border-bottom:1px dashed #E8E2D6;border-bottom:1px dashed var(--line);font-size:14px}
.term-cn{font-weight:700;color:#1B3A5C;color:var(--navy);flex:none;min-width:40%}
.term-en{color:#98A2AE;color:var(--muted);font-size:13px}

/* 速记脑图 */
.mm-node{margin:6px 0;font-size:14px}
.mm-kids{margin-left:18px;border-left:1.5px dashed #E8E2D6;border-left:1.5px dashed var(--line);padding-left:12px}
.mm-0>.mm-node{font-size:16px;font-weight:800;color:#1B3A5C;color:var(--navy)}
.mm-1>.mm-node{font-weight:700;color:#B45F4D;color:var(--rust)}

/* ---------- 目录抽屉 ---------- */
.drawer-mask{position:fixed;inset:0;background:rgba(0,0,0,.4);z-index:40}
.drawer{position:fixed;top:0;right:0;bottom:0;width:78%;max-width:320px;background:#fff;
  z-index:41;box-shadow:-4px 0 18px rgba(0,0,0,.15);display:flex;flex-direction:column}
.drawer-head{background:#1B3A5C;background:var(--navy);color:#fff;padding:16px;font-weight:800;letter-spacing:2px}
#drawer-list{overflow-y:auto;padding:8px 0}
.drawer-item{padding:13px 18px;font-size:14px;border-bottom:1px solid #F3EFE6}
.drawer-item.on{color:#B45F4D;color:var(--rust);font-weight:800;background:#FDF6EC}

/* ---------- 水印 ---------- */
.wm{position:fixed;inset:0;z-index:30;pointer-events:none;overflow:hidden}
.wm span{position:absolute;font-size:13px;color:rgba(27,58,92,.08);white-space:nowrap;
  transform:rotate(-24deg);font-weight:700}

/* ---------- 微信引导 ---------- */
.wxmask{position:fixed;inset:0;background:rgba(20,35,52,.92);z-index:99;color:#fff}
.wxarrow{position:absolute;top:10px;right:24px;font-size:52px;color:#C9A96A;color:var(--gold)}
.wxbox{position:absolute;top:90px;left:0;right:0;text-align:center;font-size:16px;line-height:2}
.wxbox b{font-size:20px;color:#C9A96A;color:var(--gold)}
.wxbox button{margin-top:16px;background:transparent;border:1.5px solid rgba(255,255,255,.55);
  color:#fff;border-radius:10px;padding:9px 20px;font-size:14px}

/* ---------- 笔记 ---------- */
.bk-notes{margin:18px 0 6px;background:#FCFBF7;border:1.5px dashed #C9A96A;border:1.5px dashed var(--gold);
  border-radius:12px;padding:12px 14px}
.notes-head{font-size:13.5px;font-weight:800;color:#1B3A5C;color:var(--navy);display:flex;align-items:center;gap:6px}
.notes-status{margin-left:auto;font-size:11.5px;color:#98A2AE;color:var(--muted);font-weight:400}
.bk-notes textarea{width:100%;margin-top:8px;border:0;background:transparent;outline:none;
  font-size:14px;line-height:1.8;min-height:64px;resize:vertical;font-family:inherit;color:#2B3644;color:var(--ink)}
.note-item{background:#fff;border:1px solid #EFEAE0;border-radius:12px;padding:12px 15px;
  margin:12px 0;box-shadow:0 2px 8px rgba(43,54,68,.05)}
.note-sec{font-size:12.5px;color:#B45F4D;color:var(--rust);font-weight:800;margin-bottom:6px}
.note-text{font-size:14px;line-height:1.8;white-space:pre-wrap}
.note-empty{text-align:center;color:#98A2AE;color:var(--muted);font-size:13.5px;padding:40px 0;line-height:2}

/* ---------- 搜索 ---------- */
.search-bar{position:sticky;top:64px;z-index:25;display:flex;gap:8px;padding:10px 12px;
  background:#fff;border-bottom:1px solid #EFEAE0}
.search-bar input{flex:1;border:1.5px solid #C9A96A;border:1.5px solid var(--gold);border-radius:10px;
  padding:10px 14px;font-size:15px;outline:none}
.search-bar button{background:none;border:0;font-size:17px;color:#98A2AE;color:var(--muted);padding:0 8px}
.search-panel{position:fixed;inset:0;top:113px;z-index:24;background:#F5F3EE;background:var(--bg);overflow-y:auto;
  padding:12px 14px 60px}
.search-meta{font-size:12.5px;color:#98A2AE;color:var(--muted);padding:4px 4px 10px}
.sr-item{background:#fff;border:1px solid #EFEAE0;border-radius:12px;padding:12px 15px;
  margin-bottom:10px;box-shadow:0 2px 8px rgba(43,54,68,.05)}
.sr-sec{font-size:12.5px;color:#B45F4D;color:var(--rust);font-weight:800;margin-bottom:5px}
.sr-text{font-size:13.5px;line-height:1.8;color:#2B3644;color:var(--ink)}
.sr-text mark{background:#F6E3B8;color:#7C3A2C;border-radius:3px;padding:0 2px}

/* ---------- Toast ---------- */
.toast{position:fixed;left:50%;bottom:90px;transform:translateX(-50%);z-index:90;
  background:rgba(27,58,92,.92);color:#fff;font-size:13.5px;border-radius:10px;
  padding:10px 18px;max-width:80%;text-align:center}

@media (min-width:760px){
  .login-card{margin-left:auto;margin-right:auto;max-width:420px;width:100%}
  .panel-narrow{margin-left:auto;margin-right:auto;max-width:420px}
}

/* ---------- 防复制保护 ---------- */
.rd-body,.shelf-list,.search-panel,.drawer,.topbar{
  -webkit-user-select:none;user-select:none;-webkit-touch-callout:none}
.bk-notes textarea,.search-bar input,.login-card input,.panel-narrow input{
  -webkit-user-select:text;user-select:text}
.topbar-user .exp{display:block;font-size:10.5px;color:#E8DCC3;opacity:.85;margin-top:2px;letter-spacing:0}
@media print{body{display:none!important}}