/* ============================================================
   律兜 · 新人成长手册  高级视觉系统
   蓝金主色 · 玻璃拟态 · 双主题(亮/暗) · 记忆面板 · 自测
   ============================================================ */

/* ---------- 设计变量 ---------- */
:root{
  --navy:#0c2440; --navy2:#123a63; --blue:#1c4f86; --blue2:#2f6fb0;
  --gold:#c9a24b; --gold2:#e3c479; --teal:#2f7d6b;
  --bg:#eef2f7; --bg2:#e3e9f1; --card:#ffffff; --text:#1f2d3d;
  --muted:#6b7a8d; --line:#e1e8f1; --soft:#eef3f9;
  --red:#c0392b; --green:#2e8b57;
  --radius:16px; --radius-s:11px;
  --shadow:0 8px 30px rgba(12,36,64,.09);
  --shadow-lg:0 18px 50px rgba(12,36,64,.16);
  --ring:0 0 0 4px rgba(28,79,134,.13);
  --font: "Microsoft YaHei","PingFang SC","Hiragino Sans GB","Source Han Sans SC",system-ui,sans-serif;
  --fs:1;            /* 字号缩放，由 JS 控制 */
  --maxw:1000px;
}
[data-theme="dark"]{
  --navy:#0a1c30; --navy2:#0f2c4a; --blue:#3a78bd; --blue2:#5aa0db;
  --gold:#d9b561; --gold2:#f0d68c; --teal:#3fa58d;
  --bg:#0a151f; --bg2:#0c1a27; --card:#13212f; --text:#e7eef6;
  --muted:#93a4b8; --line:#22384c; --soft:#15293a;
  --shadow:0 8px 30px rgba(0,0,0,.45);
  --shadow-lg:0 18px 50px rgba(0,0,0,.6);
  --ring:0 0 0 4px rgba(90,160,219,.2);
}

/* ---------- 基础 ---------- */
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;font-family:var(--font);background:var(--bg);color:var(--text);
  line-height:1.82;font-size:calc(16px*var(--fs));-webkit-font-smoothing:antialiased;
  background-image:
    radial-gradient(1200px 600px at 100% -10%, rgba(46,111,176,.10), transparent 60%),
    radial-gradient(900px 500px at -10% 110%, rgba(201,162,75,.08), transparent 55%);
  background-attachment:fixed;}
a{color:var(--blue);text-decoration:none}
img{max-width:100%}
::selection{background:rgba(201,162,75,.28)}
.wrap{display:flex;min-height:100vh}

/* ---------- 侧边栏 ---------- */
.sidebar{width:272px;flex:0 0 272px;
  background:linear-gradient(180deg,#0c2440,#102f54 55%,#0c2440);
  color:#cfe0f0;position:sticky;top:0;height:100vh;overflow-y:auto;
  padding:22px 15px;box-shadow:6px 0 30px rgba(12,36,64,.18)}
.sidebar::-webkit-scrollbar{width:7px}
.sidebar::-webkit-scrollbar-thumb{background:rgba(255,255,255,.15);border-radius:6px}
.brand{display:flex;align-items:center;gap:12px;padding:6px 8px 16px;border-bottom:1px solid rgba(255,255,255,.12);margin-bottom:14px}
.brand .logo{width:40px;height:40px;border-radius:12px;
  background:linear-gradient(135deg,var(--gold),var(--gold2));
  display:flex;align-items:center;justify-content:center;font-weight:900;color:#3a2c08;font-size:19px;
  box-shadow:0 4px 14px rgba(201,162,75,.4)}
.brand .bt{font-weight:800;color:#fff;font-size:15px;line-height:1.25}
.brand .bs{font-size:11px;color:#9fb6cf;letter-spacing:.3px}
.nav-link{display:flex;align-items:center;gap:9px;padding:9px 12px;margin:3px 0;border-radius:10px;
  color:#c4d6e8;font-size:14px;transition:.18s;position:relative}
.nav-link:before{content:"";width:6px;height:6px;border-radius:50%;background:rgba(255,255,255,.22);flex:0 0 6px;transition:.2s}
.nav-link:hover{background:rgba(255,255,255,.08);color:#fff}
.nav-link.active{background:linear-gradient(90deg,var(--gold),var(--gold2));color:#3a2c08;font-weight:700}
.nav-link.active:before{background:#3a2c08}
.nav-link .done{margin-left:auto;font-size:11px;color:var(--gold2);opacity:0}
.nav-link.done-on .done{opacity:1}
.progress{margin-top:18px;padding:13px;background:rgba(255,255,255,.06);border:1px solid rgba(255,255,255,.1);
  border-radius:12px;font-size:12px;color:#bcd0e6}
.bar{height:7px;background:rgba(255,255,255,.14);border-radius:6px;overflow:hidden;margin-top:8px}
.bar>i{display:block;height:100%;width:0;background:linear-gradient(90deg,var(--gold),var(--gold2));transition:width .4s}

/* ---------- 顶栏 + 工具 ---------- */
.main{flex:1;min-width:0;display:flex;flex-direction:column}
.topbar{position:sticky;top:0;z-index:30;background:rgba(255,255,255,.82);backdrop-filter:blur(12px);
  -webkit-backdrop-filter:blur(12px);border-bottom:1px solid var(--line);padding:10px 22px;display:flex;align-items:center;gap:12px}
[data-theme="dark"] .topbar{background:rgba(10,21,31,.8)}
.hamburger{display:none;background:var(--navy);color:#fff;border:0;border-radius:9px;width:38px;height:38px;font-size:18px;cursor:pointer}
.topbar .t{font-weight:800;color:var(--navy)}
[data-theme="dark"] .topbar .t{color:var(--text)}
.topbar .s{font-size:12px;color:var(--muted)}
.topbar .spacer{flex:1}
.tool{display:flex;gap:7px;align-items:center}
.tool button{width:34px;height:34px;border:1px solid var(--line);background:var(--card);color:var(--text);
  border-radius:9px;cursor:pointer;font-size:14px;font-weight:700;transition:.16s;display:flex;align-items:center;justify-content:center}
.tool button:hover{border-color:var(--gold);color:var(--blue);box-shadow:var(--ring)}
.tool .memo-toggle{width:auto;padding:0 12px;gap:6px;font-size:13px}

/* ---------- 内容容器 ---------- */
.content{padding:34px 44px 90px;max-width:var(--maxw);width:100%;margin:0 auto}
.lead-p{font-size:calc(15.5px*var(--fs));color:#41546a;line-height:1.85}
[data-theme="dark"] .lead-p{color:#a9bccf}
.hl{background:linear-gradient(transparent 62%,rgba(227,196,121,.55) 62%);padding:0 2px;font-weight:700}

/* ---------- 封面 ---------- */
.cover{position:relative;overflow:hidden;border-radius:24px;
  background:linear-gradient(135deg,#0c2440,#1c4f86 58%,#2f6fb0);
  color:#fff;padding:60px 50px;box-shadow:var(--shadow-lg)}
.cover:before{content:"";position:absolute;inset:0;
  background:radial-gradient(600px 300px at 85% 10%,rgba(227,196,121,.22),transparent 60%),
            radial-gradient(500px 400px at 10% 100%,rgba(46,111,176,.4),transparent 60%)}
.cover>*{position:relative}
.cover .eyebrow{letter-spacing:5px;font-size:13px;color:var(--gold2);font-weight:700}
.cover h1{font-size:46px;margin:14px 0 10px;line-height:1.12;font-weight:900;letter-spacing:1px}
.cover p{font-size:17px;color:#d6e4f3;max-width:660px;line-height:1.85}
.cover .meta{margin-top:24px;display:flex;gap:10px;flex-wrap:wrap}
.chip{background:rgba(255,255,255,.12);border:1px solid rgba(255,255,255,.22);padding:6px 14px;border-radius:30px;font-size:13px}
.cover svg{position:absolute;right:-30px;bottom:-40px;opacity:.18;width:360px;height:360px}

/* ---------- 区块标题 ---------- */
.sec-title{display:flex;align-items:center;gap:11px;margin:46px 0 18px}
.sec-title .n{background:linear-gradient(135deg,var(--navy),var(--blue));color:#fff;width:32px;height:32px;border-radius:9px;
  display:flex;align-items:center;justify-content:center;font-weight:800;font-size:14px;box-shadow:var(--ring)}
.sec-title h2{font-size:23px;margin:0;color:var(--navy);font-weight:900;letter-spacing:.5px}
[data-theme="dark"] .sec-title h2{color:var(--text)}

/* ---------- 目录网格 ---------- */
.toc-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(232px,1fr));gap:15px}
.toc-card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:17px 19px;
  transition:.2s;box-shadow:var(--shadow);position:relative;overflow:hidden}
.toc-card:after{content:"";position:absolute;left:0;top:0;bottom:0;width:4px;background:linear-gradient(var(--gold),var(--gold2));opacity:0;transition:.2s}
.toc-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-lg);border-color:var(--gold)}
.toc-card:hover:after{opacity:1}
.toc-card .k{font-size:12px;color:var(--gold);font-weight:800;letter-spacing:1px}
.toc-card h3{margin:7px 0 7px;font-size:16px;color:var(--navy);font-weight:800}
[data-theme="dark"] .toc-card h3{color:var(--text)}
.toc-card p{margin:0;font-size:13px;color:var(--muted);line-height:1.65}

/* ---------- 学习地图 ---------- */
.map{background:var(--card);border:1px solid var(--line);border-radius:20px;padding:28px 24px;box-shadow:var(--shadow);margin-top:8px;position:relative;overflow:hidden}
.map:before{content:"";position:absolute;right:-60px;top:-60px;width:200px;height:200px;border-radius:50%;background:radial-gradient(rgba(46,111,176,.12),transparent 70%)}
.map-flow{display:flex;flex-wrap:wrap;gap:12px;align-items:stretch;margin-top:18px}
.map-node{flex:1 1 150px;min-width:140px;background:linear-gradient(180deg,#f7faff,#eef4fb);border:1px solid var(--line);
  border-radius:14px;padding:15px 16px;position:relative;transition:.2s}
[data-theme="dark"] .map-node{background:linear-gradient(180deg,#15293a,#0f2233);border-color:var(--line)}
.map-node:hover{transform:translateY(-3px);box-shadow:var(--shadow)}
.map-node .step{font-size:11px;color:var(--gold);font-weight:800;letter-spacing:1.5px}
.map-node h4{margin:6px 0 5px;font-size:15px;color:var(--navy);font-weight:800}
[data-theme="dark"] .map-node h4{color:var(--text)}
.map-node p{margin:0;font-size:12px;color:var(--muted);line-height:1.55}
.map-node .arrow{position:absolute;right:-10px;top:50%;transform:translateY(-50%);color:var(--gold);font-size:20px;z-index:2}

/* ---------- 章节头 + 插画 ---------- */
.chapter-head{margin:8px 0 24px;padding-bottom:18px;border-bottom:2px solid var(--line);display:flex;gap:22px;align-items:center;flex-wrap:wrap}
.chapter-head .txt{flex:1;min-width:260px}
.chapter-head .crumb{font-size:13px;color:var(--muted)}
.chapter-head h1{font-size:31px;margin:8px 0 6px;color:var(--navy);font-weight:900;letter-spacing:.5px}
[data-theme="dark"] .chapter-head h1{color:var(--text)}
.chapter-head .lead{color:var(--muted);font-size:15px;max-width:640px}
.illus{flex:0 0 132px;width:132px;height:132px;border-radius:20px;overflow:hidden;
  background:linear-gradient(135deg,#0c2440,#2f6fb0);box-shadow:var(--shadow);display:flex;align-items:center;justify-content:center}
.illus svg{width:100%;height:100%}
@media(max-width:640px){.illus{display:none}}

/* ---------- 段落 / 卡片 ---------- */
.part{margin:32px 0}
.part>.ph{display:flex;align-items:center;gap:10px;margin:0 0 14px}
.part>.ph .dot{width:11px;height:11px;border-radius:50%;background:linear-gradient(var(--gold),var(--gold2));box-shadow:var(--ring)}
.part>.ph h2{font-size:21px;margin:0;color:var(--navy);font-weight:900}
[data-theme="dark"] .part>.ph h2{color:var(--text)}
.part>.ph .tag{margin-left:auto;font-size:12px;color:var(--blue);background:var(--soft);padding:4px 11px;border-radius:20px;font-weight:700}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);padding:20px 22px;margin:15px 0;box-shadow:var(--shadow)}
.card h3{margin:0 0 9px;color:var(--navy);font-size:17px;font-weight:800}
[data-theme="dark"] .card h3{color:var(--text)}

.grid{display:grid;gap:14px}
.grid.c2{grid-template-columns:repeat(2,1fr)}
.grid.c3{grid-template-columns:repeat(3,1fr)}
.grid.c4{grid-template-columns:repeat(4,1fr)}
@media(max-width:760px){.grid.c2,.grid.c3,.grid.c4{grid-template-columns:1fr}}
.mini{background:var(--soft);border:1px solid var(--line);border-radius:13px;padding:15px;transition:.18s}
.mini:hover{box-shadow:var(--shadow)}
.mini h4{margin:0 0 7px;color:var(--blue);font-size:15px;font-weight:800}
.mini p{margin:0;font-size:13.5px;color:#41546a;line-height:1.7}
[data-theme="dark"] .mini p{color:#a9bccf}

/* ---------- 话术卡 ---------- */
.script{position:relative;background:#fffdf6;border-left:5px solid var(--gold);border-radius:0 13px 13px 0;padding:14px 17px;margin:12px 0;font-size:calc(14.5px*var(--fs));color:#3a3320;line-height:1.8}
[data-theme="dark"] .script{background:#1d2a1e;border-left-color:var(--gold);color:#e9e4cf}
.script .lab{display:inline-block;font-size:11px;font-weight:800;color:#8a6d1f;background:#f6ecd2;padding:2px 9px;border-radius:7px;margin-bottom:7px;letter-spacing:.5px}
.script.blue{background:#f3f8ff;border-left-color:var(--blue)}
.script.blue .lab{color:#1c4f86;background:#e3eefc}
.script.teal{background:#f1faf6;border-left-color:var(--teal)}
.script.teal .lab{color:#1f5b4c;background:#d8f0e8}
.copy-btn{position:absolute;top:10px;right:10px;background:var(--soft);border:1px solid var(--line);border-radius:8px;font-size:12px;padding:4px 10px;cursor:pointer;color:var(--blue);font-weight:700;transition:.16s}
.copy-btn:hover{background:var(--gold);color:#3a2c08;border-color:var(--gold)}

/* ---------- 提示框 ---------- */
.callout{border-radius:13px;padding:14px 17px;margin:13px 0;font-size:calc(14.5px*var(--fs));line-height:1.8;position:relative}
.callout .ct{font-weight:800;margin-bottom:5px;display:flex;align-items:center;gap:7px}
.tip{background:#eef7ff;border:1px solid #cfe4fb;color:#234b73}
.warn{background:#fff3ef;border:1px solid #f6cdbd;color:#9a3b25}
.good{background:#eefaf1;border:1px solid #c9ebd3;color:#247a47}
.note{background:#f6f1e6;border:1px solid #e6d8b5;color:#7a6326}
[data-theme="dark"] .tip,.warn,.good,.note{color:var(--text)}

/* ---------- 公式 ---------- */
.formula{background:linear-gradient(135deg,#0c2440,#16406d);color:#eaf2fb;border-radius:13px;padding:15px 19px;margin:13px 0;font-size:calc(14.5px*var(--fs));font-family:"Consolas","SF Mono",monospace;line-height:1.7}
.formula b{color:var(--gold2)}

/* ---------- 步骤 / 时间线 ---------- */
.steps{counter-reset:s;margin:15px 0;padding:0;list-style:none}
.steps li{position:relative;padding:11px 0 11px 48px;border-left:2px solid var(--line);margin-left:18px}
.steps li:before{counter-increment:s;content:counter(s);position:absolute;left:-19px;top:8px;width:36px;height:36px;
  background:linear-gradient(135deg,var(--navy),var(--blue));color:#fff;border-radius:50%;display:flex;align-items:center;justify-content:center;font-weight:800;box-shadow:var(--ring)}
.steps li b{color:var(--navy)}
[data-theme="dark"] .steps li b{color:var(--gold2)}
.timeline{margin:15px 0}
.tl-item{display:flex;gap:14px;padding:11px 0;border-bottom:1px dashed var(--line)}
.tl-item .when{flex:0 0 120px;font-weight:800;color:var(--blue)}
.tl-item .what{color:#41546a;line-height:1.7}
[data-theme="dark"] .tl-item .what{color:#a9bccf}

/* ---------- 标签页 ---------- */
.tabs{margin:15px 0}
.tab-head{display:flex;gap:6px;flex-wrap:wrap;border-bottom:2px solid var(--line)}
.tab-btn{padding:9px 17px;border:0;background:transparent;cursor:pointer;font-size:14px;color:var(--muted);border-bottom:3px solid transparent;font-weight:700;transition:.16s}
.tab-btn:hover{color:var(--blue)}
.tab-btn.on{color:var(--navy);border-bottom-color:var(--gold)}
[data-theme="dark"] .tab-btn.on{color:var(--gold2)}
.tab-pane{display:none;padding:17px 4px;animation:fade .3s}
.tab-pane.on{display:block}
@keyframes fade{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:none}}

/* ---------- 折叠 ---------- */
.acc{margin:13px 0}
.acc-item{border:1px solid var(--line);border-radius:11px;margin:9px 0;overflow:hidden;background:var(--card)}
.acc-q{padding:14px 17px;cursor:pointer;font-weight:800;color:var(--navy);display:flex;justify-content:space-between;align-items:center;font-size:15px}
[data-theme="dark"] .acc-q{color:var(--text)}
.acc-q .ic{transition:.25s;color:var(--gold);font-size:20px}
.acc-item.open .acc-q .ic{transform:rotate(45deg)}
.acc-a{max-height:0;overflow:hidden;transition:max-height .3s;padding:0 17px;color:#41546a;font-size:14.5px;line-height:1.8}
[data-theme="dark"] .acc-a{color:#a9bccf}
.acc-item.open .acc-a{max-height:1400px;padding:4px 17px 17px}

/* ---------- KPI / 徽章 ---------- */
.kpis{display:grid;grid-template-columns:repeat(auto-fill,minmax(150px,1fr));gap:12px;margin:15px 0}
.kpi{background:linear-gradient(135deg,#0c2440,#1c4f86);color:#fff;border-radius:13px;padding:17px;text-align:center;box-shadow:var(--shadow);transition:.2s}
.kpi:hover{transform:translateY(-3px);box-shadow:var(--shadow-lg)}
.kpi .v{font-size:25px;font-weight:900;color:var(--gold2)}
.kpi .l{font-size:12px;color:#bcd0e6;margin-top:5px}
.badge{display:inline-block;background:var(--soft);color:var(--blue);border:1px solid var(--line);border-radius:20px;padding:3px 11px;font-size:12px;margin:3px 4px 3px 0;font-weight:700}
.tag-gold{background:#f6ecd2;color:#8a6d1f;border-color:#ecd9a8}
.tag-teal{background:#d8f0e8;color:#1f5b4c;border-color:#bfe6da}

/* ---------- 表格 ---------- */
.tbl{width:100%;border-collapse:collapse;margin:15px 0;font-size:14px;background:var(--card);border-radius:13px;overflow:hidden;box-shadow:var(--shadow)}
.tbl th{background:linear-gradient(135deg,var(--navy),var(--blue));color:#fff;text-align:left;padding:11px 14px;font-weight:700}
.tbl td{padding:10px 14px;border-bottom:1px solid var(--line);color:#41546a;line-height:1.7}
[data-theme="dark"] .tbl td{color:#a9bccf}
.tbl tr:last-child td{border-bottom:0}
.tbl tr:nth-child(even) td{background:rgba(46,111,176,.05)}

/* ---------- 计算器 ---------- */
.calc{background:var(--card);border:1px solid var(--line);border-radius:18px;padding:22px;margin:17px 0;box-shadow:var(--shadow)}
.calc .ch{display:flex;align-items:center;gap:11px;margin-bottom:7px}
.calc .ch .ic{width:36px;height:36px;border-radius:10px;background:linear-gradient(135deg,var(--gold),var(--gold2));color:#3a2c08;
  display:flex;align-items:center;justify-content:center;font-weight:900;font-size:18px}
.calc h3{margin:0;color:var(--navy);font-size:18px;font-weight:800}
[data-theme="dark"] .calc h3{color:var(--text)}
.calc .desc{color:var(--muted);font-size:13.5px;margin:3px 0 15px}
.calc .row{display:grid;grid-template-columns:1fr 1fr;gap:13px}
@media(max-width:640px){.calc .row{grid-template-columns:1fr}}
.field{margin:9px 0}
.field label{display:block;font-size:13px;color:var(--muted);margin-bottom:5px;font-weight:600}
.field input,.field select{width:100%;padding:10px 13px;border:1px solid var(--line);border-radius:10px;font-size:15px;font-family:inherit;background:var(--soft);color:var(--text);transition:.16s}
.field input:focus,.field select:focus{outline:none;border-color:var(--blue);box-shadow:var(--ring)}
.btn{background:linear-gradient(135deg,var(--navy),var(--blue));color:#fff;border:0;border-radius:10px;padding:12px 22px;font-size:15px;font-weight:800;cursor:pointer;margin-top:8px;transition:.16s}
.btn:hover{opacity:.92;transform:translateY(-1px);box-shadow:var(--shadow)}
.result{margin-top:15px;background:#eefaf1;border:1px solid #c9ebd3;border-radius:12px;padding:15px 17px;font-size:15px;color:#247a47;display:none;line-height:1.75}
[data-theme="dark"] .result{background:#16331f;color:#8fe0a8;border-color:#2c5e3a}
.result.show{display:block;animation:fade .3s}
.result b{font-size:17px}
.result .sub{font-size:13px;color:#3c6b50;margin-top:5px}
[data-theme="dark"] .result .sub{color:#9ecbb0}

/* ---------- 自测题 ---------- */
.quiz{background:linear-gradient(135deg,#fff,#f4f8fd);border:1px solid var(--line);border-radius:16px;padding:20px 22px;margin:16px 0;box-shadow:var(--shadow)}
[data-theme="dark"] .quiz{background:linear-gradient(135deg,#13212f,#0f1d2b)}
.quiz .qh{display:flex;align-items:center;gap:9px;font-weight:800;color:var(--navy);margin-bottom:4px}
[data-theme="dark"] .quiz .qh{color:var(--gold2)}
.quiz .qh .dot{width:26px;height:26px;border-radius:8px;background:linear-gradient(135deg,var(--teal),#43a088);color:#fff;display:flex;align-items:center;justify-content:center;font-size:13px}
.quiz-q{font-size:15.5px;font-weight:700;margin:8px 0 14px;color:var(--text);line-height:1.7}
.quiz-opt{display:block;width:100%;text-align:left;padding:12px 15px;margin:8px 0;border:1px solid var(--line);border-radius:11px;background:var(--card);cursor:pointer;font-size:14.5px;color:var(--text);transition:.16s;font-family:inherit}
.quiz-opt:hover{border-color:var(--blue);box-shadow:var(--ring)}
.quiz-opt.correct{background:#eefaf1;border-color:#7fc99a;color:#1f7a47;font-weight:700}
.quiz-opt.wrong{background:#fff3ef;border-color:#f0a98f;color:#b24026}
.quiz-opt:disabled{cursor:default;opacity:.95}
.quiz-fb{margin-top:12px;padding:12px 15px;border-radius:11px;font-size:14px;line-height:1.75;display:none;background:var(--soft);color:var(--text)}
.quiz-fb.show{display:block;animation:fade .3s}
.quiz-fb.ok{background:#eefaf1;color:#1f7a47}
.quiz-fb.no{background:#fff3ef;color:#b24026}
.quiz-badge{float:right;font-size:12px;font-weight:800;padding:2px 10px;border-radius:20px;background:var(--soft);color:var(--blue)}

/* ---------- 记忆点标记 ---------- */
.head-anchor{display:flex;align-items:center;gap:8px;position:relative}
.memo-btn{flex:0 0 auto;width:26px;height:26px;border-radius:8px;border:1px solid var(--line);background:var(--card);cursor:pointer;color:var(--muted);font-size:14px;transition:.16s;display:flex;align-items:center;justify-content:center;opacity:0;transition:.18s}
.head-anchor:hover .memo-btn{opacity:1}
.memo-btn.on{opacity:1;color:var(--gold);border-color:var(--gold);background:#fdf6e6}
.memo-btn:hover{color:var(--gold)}

/* ---------- 记忆点侧滑面板 ---------- */
.memo-panel{position:fixed;top:0;right:-380px;width:360px;max-width:90vw;height:100vh;z-index:60;
  background:var(--card);box-shadow:-12px 0 40px rgba(12,36,64,.22);transition:right .28s;display:flex;flex-direction:column}
.memo-panel.open{right:0}
.memo-panel .mp-head{padding:18px 20px;border-bottom:1px solid var(--line);display:flex;align-items:center;gap:10px;background:linear-gradient(135deg,#0c2440,#1c4f86);color:#fff}
.memo-panel .mp-head .mt{font-weight:800;font-size:16px}
.memo-panel .mp-head .mc{font-size:12px;color:#bcd0e6}
.memo-panel .mp-close{margin-left:auto;background:rgba(255,255,255,.15);border:0;color:#fff;width:30px;height:30px;border-radius:8px;cursor:pointer;font-size:16px}
.memo-list{flex:1;overflow-y:auto;padding:12px}
.memo-group{margin:6px 0 14px}
.memo-group .gg{font-size:12px;color:var(--muted);font-weight:800;padding:4px 8px;letter-spacing:.5px}
.memo-item{display:flex;align-items:center;gap:9px;padding:10px 12px;margin:6px 0;border:1px solid var(--line);border-radius:11px;cursor:pointer;transition:.16s;font-size:14px;color:var(--text)}
.memo-item:hover{border-color:var(--gold);background:var(--soft);transform:translateX(2px)}
.memo-item .mi-t{font-weight:700;color:var(--blue);flex:0 0 auto}
.memo-item .mi-x{margin-left:auto;color:var(--muted);cursor:pointer;font-size:15px;padding:0 4px}
.memo-item .mi-x:hover{color:var(--red)}
.memo-empty{padding:30px 20px;text-align:center;color:var(--muted);font-size:14px;line-height:1.8}

/* ---------- 继续学习提示 ---------- */
.resume-tip{position:fixed;left:50%;bottom:22px;transform:translateX(-50%) translateY(120px);z-index:55;
  background:linear-gradient(135deg,var(--navy),var(--blue));color:#fff;border-radius:14px;padding:13px 18px;
  display:flex;align-items:center;gap:12px;box-shadow:var(--shadow-lg);transition:transform .35s;font-size:14px}
.resume-tip.show{transform:translateX(-50%) translateY(0)}
.resume-tip b{font-weight:800}
.resume-tip a{color:var(--gold2);font-weight:800;text-decoration:underline;cursor:pointer}
.resume-tip .x{margin-left:6px;cursor:pointer;opacity:.7;font-size:16px}

/* ---------- 翻页 / 页脚 ---------- */
.pager{display:flex;justify-content:space-between;gap:12px;margin:48px 0 12px;padding-top:24px;border-top:2px solid var(--line)}
.pager a{flex:1;background:var(--card);border:1px solid var(--line);border-radius:13px;padding:15px 19px;transition:.18s}
.pager a:hover{border-color:var(--gold);transform:translateY(-2px);box-shadow:var(--shadow)}
.pager .pl{font-size:12px;color:var(--muted)}
.pager .pt{font-weight:800;color:var(--navy);margin-top:4px;font-size:15px}
[data-theme="dark"] .pager .pt{color:var(--text)}
.pager .nx{text-align:right}
.foot{padding:28px 44px;color:var(--muted);font-size:13px;text-align:center;border-top:1px solid var(--line);background:var(--card)}

/* ---------- 杂项 ---------- */
.ul{margin:8px 0 8px 4px;padding-left:20px}
.ul li{margin:5px 0;line-height:1.8}
.checklist{list-style:none;padding:0;margin:11px 0}
.checklist li{padding:9px 13px 9px 40px;position:relative;background:var(--card);border:1px solid var(--line);border-radius:11px;margin:8px 0;font-size:14.5px;line-height:1.7}
.checklist li:before{content:"✓";position:absolute;left:14px;top:9px;color:var(--blue);font-size:17px;font-weight:800}
.mark{background:linear-gradient(transparent 55%,rgba(227,196,121,.5) 55%);padding:0 1px;cursor:pointer}

@media(max-width:900px){
  .sidebar{position:fixed;left:-284px;top:0;z-index:50;transition:left .25s;box-shadow:0 0 36px rgba(0,0,0,.35)}
  .sidebar.open{left:0}
  .hamburger{display:block}
  .content{padding:24px 18px 80px}
  .cover h1{font-size:31px}
  .cover{padding:42px 28px}
}
.mask{display:none;position:fixed;inset:0;background:rgba(0,0,0,.45);z-index:45}
.mask.show{display:block}