/* ============================================================
   地理互动课堂 · 共享样式
   基于纸面手绘与黑板讲台风格：自然大地与海洋色彩体系
   ============================================================ */
:root{
  --paper:#f4f1e8; --paper2:#fdfbf7; --ink:#1b2a4a; --ink2:#4a5b82;
  --red:#c44d34; --yellow:#e5a93b; --green:#2a6b4d; --blue:#2662c7;
  --earth:#2a6b4d; --sea:#2662c7; --terracotta:#c44d34;
  --board:#204030; --board2:#152d22; --chalk:#f4f3ec; --chalk-dim:#afc0b2;
  --hard:6px 6px 0 rgba(27,42,74,.14);
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:'Noto Sans SC',sans-serif;color:var(--ink);line-height:1.75;
  background:
    radial-gradient(900px 500px at 85% -5%,rgba(196,77,52,.07),transparent 60%),
    radial-gradient(700px 500px at -10% 30%,rgba(38,98,199,.06),transparent 60%),
    linear-gradient(rgba(27,42,74,.06) 1px,transparent 1px),
    linear-gradient(90deg,rgba(27,42,74,.06) 1px,transparent 1px),
    var(--paper);
  background-size:auto,auto,24px 24px,24px 24px,auto;
  -webkit-tap-highlight-color:transparent;
}
::selection{background:var(--yellow);color:var(--ink)}
.wrap{max-width:1160px;margin:0 auto;padding:0 max(20px, env(safe-area-inset-right, 20px)) 0 max(20px, env(safe-area-inset-left, 20px))}
h1,h2,h3,h4{font-family:'ZCOOL QingKe HuangYou',sans-serif;font-weight:400;letter-spacing:1.5px}
.mono{font-family:'IBM Plex Mono',monospace}
.hand{font-family:'Ma Shan Zheng',cursive}
img,svg{max-width:100%}
button{font-family:inherit}

/* ---------- 顶部进度条 & 导航 ---------- */
#pbar{position:fixed;top:0;left:0;height:3px;background:var(--terracotta);width:0;z-index:99}
nav{position:sticky;top:0;z-index:90;background:rgba(244,241,232,.95);backdrop-filter:blur(6px);-webkit-backdrop-filter:blur(6px);border-bottom:2px solid var(--ink);padding-top:env(safe-area-inset-top, 0px)}
.nav-in{display:flex;align-items:center;gap:18px;height:56px}
.logo{display:flex;align-items:center;gap:10px;font-family:'ZCOOL QingKe HuangYou';font-size:20px;white-space:nowrap;color:var(--ink);text-decoration:none}
.logo-box{width:32px;height:32px;background:var(--ink);color:var(--yellow);display:grid;place-items:center;border-radius:6px;box-shadow:2px 2px 0 var(--terracotta);font-size:17px}
.nav-links{display:flex;gap:4px;margin-left:auto;overflow-x:auto;scrollbar-width:none}
.nav-links::-webkit-scrollbar{display:none}
.nav-links a{color:var(--ink);text-decoration:none;font-size:14px;font-weight:500;padding:6px 10px;white-space:nowrap;border-radius:6px;position:relative;transition:.2s}
.nav-links a:hover{background:rgba(27,42,74,.08)}
.nav-links a.active{color:var(--terracotta);font-weight:700}
.nav-links a.active::after{content:'';position:absolute;left:10px;right:10px;bottom:2px;height:3px;background:var(--terracotta);border-radius:2px}
.nav-side{display:flex;gap:8px;align-items:center}
.install-btn{display:none;align-items:center;gap:6px;border:2px solid var(--ink);background:var(--yellow);color:var(--ink);
  font-size:13px;font-weight:800;padding:5px 12px;border-radius:8px;cursor:pointer;box-shadow:2px 2px 0 rgba(27,42,74,.3)}
.install-btn.show{display:inline-flex}

/* ---------- 通用组件 ---------- */
.panel{background:var(--paper2);border:2px solid var(--ink);border-radius:10px;box-shadow:var(--hard)}
.btn{display:inline-flex;align-items:center;gap:6px;border:2px solid var(--ink);background:#fff;color:var(--ink);
  padding:8px 18px;border-radius:8px;font-size:14px;font-weight:700;font-family:inherit;cursor:pointer;
  box-shadow:3px 3px 0 var(--ink);transition:.15s}
.btn:hover{transform:translate(-1px,-1px);box-shadow:4px 4px 0 var(--ink)}
.btn:active{transform:translate(2px,2px);box-shadow:0 0 0 var(--ink)}
.btn.red{background:var(--terracotta);color:#fff}
.btn.green{background:var(--green);color:#fff}
.btn.yellow{background:var(--yellow)}
.btn:disabled{opacity:.45;cursor:not-allowed;transform:none}
.chip{display:inline-flex;align-items:center;gap:6px;border:1.6px solid var(--ink);padding:3px 12px;border-radius:999px;font-size:13px;font-weight:700;background:#fff}
.tag{font-family:'IBM Plex Mono';font-size:12px;letter-spacing:1px;color:var(--terracotta)}
.shead{display:flex;align-items:flex-end;gap:18px;flex-wrap:wrap;margin-bottom:32px;border-bottom:3px dashed rgba(27,42,74,.25);padding-bottom:16px}
.sec-no{font-family:'IBM Plex Mono';font-size:15px;color:var(--terracotta);border:2px solid var(--terracotta);padding:2px 9px;border-radius:5px;background:#fff;flex:none}
.sec-title{font-size:clamp(28px,3.6vw,42px);line-height:1.1}
.sec-sub{font-size:14px;color:var(--ink2);margin-top:4px}
.sec-note{margin-left:auto;font-family:'Ma Shan Zheng';font-size:21px;color:var(--terracotta);transform:rotate(-2deg)}
section{padding:64px 0}
section.tight{padding-top:26px}
.stamp{display:inline-block;font-family:'ZCOOL QingKe HuangYou';color:var(--terracotta);border:3px solid var(--terracotta);
  padding:4px 16px;border-radius:8px;letter-spacing:6px;font-size:26px;opacity:0;pointer-events:none}
.stamp.show{animation:stampIn .5s cubic-bezier(.2,1.8,.4,1) forwards}
@keyframes stampIn{0%{opacity:0;transform:rotate(-8deg) scale(2.2)}100%{opacity:.95;transform:rotate(-8deg) scale(1)}}
.js .reveal{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s ease}
.js .reveal.in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}
.note-line{font-size:13px;color:var(--ink2);margin-top:12px;padding-left:14px;border-left:4px solid var(--yellow)}
.grid2{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.grid3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}

/* ---------- 页面 HERO（主题页） ---------- */
.page-hero{padding:44px 0 30px;position:relative;overflow:hidden}
.page-hero .crumb a{color:var(--ink2);text-decoration:none;font-size:13px;font-weight:600}
.page-hero .crumb a:hover{color:var(--terracotta)}
.page-hero h1{font-size:clamp(44px,7vw,84px);line-height:1;margin:8px 0 4px;display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.page-hero .kicker{display:flex;align-items:center;gap:10px;font-family:'IBM Plex Mono';font-size:13px;letter-spacing:2px;color:var(--terracotta);margin-bottom:10px}
.page-hero .kicker::before{content:'';width:12px;height:12px;background:var(--terracotta)}
.page-hero .sub{font-size:15.5px;color:var(--ink2);max-width:70ch}
.page-hero .tags{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px}
.uline{width:170px;height:9px;margin:6px 0 10px;background:var(--terracotta);border-radius:5px;transform:skewX(-12deg)}
.fsym{position:absolute;font-family:'IBM Plex Mono';font-weight:600;color:var(--ink);opacity:.1;user-select:none;pointer-events:none;animation:drift 10s ease-in-out infinite alternate}
@keyframes drift{from{transform:translate(0,0) rotate(-6deg)}to{transform:translate(18px,-26px) rotate(8deg)}}

/* ---------- 知识卡片 ---------- */
.kgrid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:18px}
.kcard{border:2px solid var(--ink);border-radius:10px;background:#fff;padding:16px 18px;box-shadow:4px 4px 0 rgba(27,42,74,.12);position:relative;transition:.2s}
.kcard:hover{transform:translateY(-3px)}
.kcard h4{font-size:19px;margin-bottom:6px;display:flex;align-items:center;gap:8px}
.kcard h4 .ki{width:30px;height:30px;border-radius:8px;display:grid;place-items:center;font-size:16px;background:rgba(229,169,59,.35)}
.kcard p{font-size:14px;color:#2a3b5c}
.kcard .kex{margin-top:10px;font-size:12.5px;background:rgba(38,98,199,.08);border-left:3px solid var(--blue);padding:7px 10px;border-radius:0 7px 7px 0;color:#234a8a}
.kcard:hover .kex{background:rgba(38,98,199,.12)}
.kcard.green{border-color:var(--green)}
.kcard.green h4 .ki{background:rgba(42,107,77,.25)}
.kcard.red{border-color:var(--terracotta)}
.kcard.red h4 .ki{background:rgba(196,77,52,.25)}

/* ---------- 交互控件面板 ---------- */
.demo-sec{padding-top:10px}
.panel.demo{padding:18px 20px}
.demo-title{display:flex;align-items:center;justify-content:space-between;gap:12px;font-family:'ZCOOL QingKe HuangYou';font-size:22px;letter-spacing:1px;margin-bottom:6px}
.demo-desc{font-size:13.5px;color:var(--ink2);margin-bottom:14px}
.droot{min-height:280px;display:flex;flex-direction:column;gap:12px}
.wstage{border:2px solid var(--ink);border-radius:8px;background:#fff;box-shadow:2px 2px 0 rgba(27,42,74,.1);overflow:hidden;touch-action:none}
.wctl{display:flex;gap:14px;align-items:center;flex-wrap:wrap;background:rgba(27,42,74,.05);padding:10px 14px;border-radius:8px;border:1.5px solid var(--ink)}
.wc{display:flex;align-items:center;gap:8px;font-size:13px;font-weight:700}
.wc input[type="range"]{accent-color:var(--terracotta);cursor:pointer}
.wc output{font-family:'IBM Plex Mono';font-size:13px;min-width:48px;font-weight:700;color:var(--terracotta)}
.wread{display:flex;gap:12px;flex-wrap:wrap;font-size:13px;padding:6px 12px;background:#fff;border-radius:6px;border:1.2px solid var(--ink)}
.wread b{font-family:'IBM Plex Mono';color:var(--terracotta)}
.wcap{font-size:13px;color:var(--ink2);line-height:1.6;padding-left:12px;border-left:3px solid var(--yellow);margin-top:6px}
.opt-row{display:flex;gap:8px;flex-wrap:wrap}
.opt-row .btn{padding:5px 12px;font-size:12.5px}
.opt-row .btn.on{background:var(--terracotta);color:#fff}

/* ---------- Manim-Grade 3D 动力学面板布局 (消除右侧空白，自适应全宽与分栏) ---------- */
.manim-dashboard{display:flex;flex-direction:column;gap:14px;width:100%;box-sizing:border-box}
.manim-main{display:grid;grid-template-columns:minmax(0,1.4fr) minmax(0,1fr);gap:16px;width:100%;align-items:stretch}
.manim-main.wide{grid-template-columns:1fr}
@media (max-width:900px){.manim-main{grid-template-columns:1fr}}
.manim-canvas-box{position:relative;width:100%;border-radius:10px;overflow:hidden;box-shadow:0 10px 28px rgba(0,0,0,.4);background:#0a0e17;border:1.5px solid #1e293b;display:flex;align-items:center;justify-content:center}
.manim-canvas-box canvas{width:100%!important;height:100%!important;display:block;cursor:grab}
.manim-canvas-box canvas:active{cursor:grabbing}
.manim-panel{background:#0f172a;border:1.5px solid #1e293b;border-radius:10px;padding:16px 18px;color:#cbd5e1;display:flex;flex-direction:column;gap:12px;box-shadow:0 8px 24px rgba(0,0,0,.25);box-sizing:border-box}
.manim-panel h4{margin:0;font-family:'IBM Plex Mono','Noto Sans SC',sans-serif;font-size:13.5px;color:#38bdf8;display:flex;align-items:center;gap:6px;letter-spacing:.5px}
.manim-hud-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.manim-hud-card{background:#1e293b;border:1px solid #334155;border-radius:6px;padding:8px 10px;font-family:'IBM Plex Mono',monospace;font-size:11px}
.manim-hud-card span{display:block;color:#94a3b8;font-size:10px;margin-bottom:2px}
.manim-hud-card b{font-size:13px;color:#facc15}
.manim-theory{font-size:12px;line-height:1.65;color:#94a3b8;border-left:3px solid #38bdf8;padding-left:10px;margin-top:auto}
.manim-theory b{color:#f8fafc}
.manim-timeline-bar{display:flex;align-items:center;gap:12px;width:100%;box-sizing:border-box;background:#0f172a;padding:8px 14px;border-radius:8px;border:1px solid #1e293b;color:#f8fafc;font-family:'IBM Plex Mono',monospace;font-size:12px}

/* 探究实验/地理野外考察专栏 */
.exp-panel{padding:20px;margin-top:22px;background:#fff;border:2px solid var(--ink);border-radius:10px;box-shadow:var(--hard)}
.exp-head{display:flex;align-items:center;gap:12px;margin-bottom:12px}
.exp-badge{background:var(--terracotta);color:#fff;font-size:12px;font-weight:800;padding:3px 8px;border-radius:5px}
.exp-title{font-size:22px;margin:0}
.exp-principle{font-size:14px;color:var(--ink);background:rgba(229,169,59,.12);border-left:4px solid var(--yellow);padding:8px 12px;border-radius:0 6px 6px 0;margin-bottom:14px}
.exp-block{margin-top:14px}
.exp-sub-title{font-size:15px;font-weight:800;color:var(--ink);display:flex;align-items:center;gap:6px;margin-bottom:8px}
.exp-list{padding-left:22px;font-size:13.5px;color:#2c3b58;line-height:1.7}
.exp-list.error-list li{color:#8c2d1b}

/* ---------- 核心公式 & 计算器 ---------- */
.fx-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:18px}
.fx-card{background:#fff;border:2px solid var(--ink);border-radius:10px;box-shadow:4px 4px 0 rgba(27,42,74,.12);padding:18px 20px;position:relative}
.fx-name{font-size:17px;font-weight:700;display:flex;align-items:center;gap:8px;margin-bottom:10px}
.fx-name .em{font-size:18px}
.fx-big{font-family:'IBM Plex Mono',monospace;font-size:clamp(22px,3.2vw,32px);font-weight:700;color:var(--terracotta);letter-spacing:1px;margin:8px 0;word-break:break-all}
.fx-big .t{border-bottom:2px dashed var(--yellow);cursor:help;position:relative}
.fx-big .t:hover::after{content:attr(data-tip);position:absolute;bottom:100%;left:50%;transform:translateX(-50%);background:var(--ink);color:#fff;font-size:12px;font-family:'Noto Sans SC';font-weight:400;padding:4px 8px;border-radius:4px;white-space:nowrap;pointer-events:none;z-index:10}
.deriv{display:flex;gap:8px;flex-wrap:wrap;font-family:'IBM Plex Mono';font-size:12.5px;color:var(--ink2);margin:8px 0}
.deriv span{background:rgba(27,42,74,.06);padding:2px 6px;border-radius:4px}
.fx-vars{font-size:13px;color:var(--ink2);line-height:1.6;margin-top:10px}
.fx-sub{font-size:12.5px;color:var(--terracotta);margin-top:6px}

.calc-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:12px;margin:14px 0}
.calc-grid label{font-size:12px;font-weight:700;color:var(--ink2);display:block;margin-bottom:4px}
.calc-grid input{width:100%;border:2px solid var(--ink);border-radius:6px;padding:8px 10px;font-family:'IBM Plex Mono';font-size:15px;font-weight:700;box-sizing:border-box}
.calc-grid input.solved{background:#e8f5e9;border-color:var(--green);color:#1b5e20}
.calc-msg{font-size:13.5px;font-weight:700;color:var(--terracotta);margin-left:8px}

/* ---------- 生活中的应用 ---------- */
.app-card{background:#fff;border:2px solid var(--ink);border-radius:10px;box-shadow:3px 3px 0 rgba(27,42,74,.12);padding:16px;display:flex;gap:14px;align-items:flex-start}
.app-card .ae{font-size:32px;flex-shrink:0}
.app-card h5{font-size:17px;margin-bottom:4px}
.app-card p{font-size:13.5px;color:#2c3b58;line-height:1.65}

/* ---------- 黑板风：解题技巧与例题 ---------- */
.board-sec{background:var(--board);color:var(--chalk);border-top:3px solid var(--ink);border-bottom:3px solid var(--ink);padding:60px 0}
.board-sec .sec-no{background:var(--board2);color:var(--yellow);border-color:var(--yellow)}
.board-sec .sec-title{color:var(--chalk)}
.board-sec .sec-sub{color:var(--chalk-dim)}
.board-sec .sec-note{color:var(--yellow)}
.board-sec .shead{border-color:rgba(244,243,236,.25)}
.t-grid{display:grid;grid-template-columns:1fr 1fr;gap:22px}
.chalk-panel{background:var(--board2);border:2px solid rgba(244,243,236,.2);border-radius:10px;padding:20px;box-shadow:inset 0 0 20px rgba(0,0,0,.3)}
.chalk-panel h3{font-size:22px;color:var(--yellow);margin-bottom:4px}
.chalk-panel .sub{font-size:13px;color:var(--chalk-dim);margin-bottom:14px}
.chalk-panel ol.steps{padding-left:22px;font-size:14px;line-height:1.8}
.chalk-panel .mistake{display:flex;flex-direction:column;gap:12px;font-size:13.5px}
.chalk-panel .mistake .no{color:#ff8a80}
.chalk-panel .mistake .yes{color:#b9f6ca;font-weight:700}
.jue-card{margin-top:22px;background:var(--board2);border:2px dashed var(--yellow);border-radius:10px;padding:16px 20px;text-align:center}
.jue-card p{font-family:'Ma Shan Zheng',cursive;font-size:22px;color:var(--yellow);line-height:1.7}
.oly-panel{margin-top:20px;grid-column:1/-1}
.oly-item{margin-bottom:10px}
.oly-title{color:var(--yellow);font-size:14.5px}
.oly-desc{font-size:13.5px;color:var(--chalk-dim);margin-top:3px}

.ex-panel{background:var(--board2);border:2px solid var(--yellow);border-radius:10px;padding:22px}
.ex-head{display:flex;align-items:center;justify-content:space-between;border-bottom:1px dashed rgba(244,243,236,.25);padding-bottom:12px;margin-bottom:16px;flex-wrap:wrap;gap:10px}
.ex-card{background:rgba(0,0,0,.2);border-radius:8px;padding:16px;margin-bottom:16px;border-left:4px solid var(--yellow)}
.ex-top{display:flex;align-items:center;gap:10px;margin-bottom:8px}
.ex-badge{font-size:11.5px;font-weight:800;padding:2px 8px;border-radius:4px;background:var(--yellow);color:var(--ink)}
.ex-badge.gaokao{background:#ff7043;color:#fff}
.ex-badge.zhongkao{background:#42a5f5;color:#fff}
.ex-title{font-size:16px;font-weight:700;color:var(--chalk)}
.ex-stem{font-size:14px;line-height:1.75;margin-bottom:10px;color:#f0efe6}
.ex-sec-title{font-size:13.5px;font-weight:700;margin:8px 0 4px;display:flex;align-items:center;gap:6px}
.ex-model,.ex-summary{font-size:13.5px;line-height:1.7;color:var(--chalk-dim);background:rgba(255,255,255,.05);padding:8px 12px;border-radius:6px}
.ex-steps{padding-left:22px;font-size:13.5px;line-height:1.8;color:#f0efe6}

/* ---------- 随堂测验 ---------- */
.quiz-head{display:flex;align-items:center;gap:12px;margin-bottom:20px;flex-wrap:wrap}
.score-chip{border:2px solid var(--ink);border-radius:8px;padding:6px 14px;background:#fff;font-size:14px;font-weight:700}
.score-chip b{font-family:'IBM Plex Mono';color:var(--terracotta);font-size:18px}
.q-card{padding:18px 20px;margin-bottom:18px}
.q-top{display:flex;align-items:center;gap:8px;margin-bottom:10px}
.q-no{font-family:'IBM Plex Mono';font-size:14px;font-weight:800;background:var(--ink);color:var(--yellow);padding:2px 8px;border-radius:4px}
.q-tag{font-size:12px;font-weight:700;color:var(--ink2);background:rgba(27,42,74,.08);padding:2px 8px;border-radius:4px}
.q-stem{font-size:15.5px;font-weight:600;line-height:1.65;margin-bottom:14px}
.opts{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.opt{text-align:left;border:2px solid var(--ink);background:#fff;border-radius:8px;padding:10px 14px;font-size:14px;font-weight:600;cursor:pointer;transition:.15s;box-shadow:2px 2px 0 rgba(27,42,74,.1)}
.opt:hover:not(:disabled){transform:translateY(-2px);background:rgba(229,169,59,.15)}
.opt.correct{background:#e8f5e9!important;border-color:var(--green)!important;color:#1b5e20!important;box-shadow:2px 2px 0 var(--green)!important}
.opt.wrong{background:#ffebee!important;border-color:var(--red)!important;color:#b71c1c!important}
.q-exp{display:none;margin-top:14px;padding:10px 14px;border-radius:6px;background:rgba(38,98,199,.08);border-left:4px solid var(--blue);font-size:13.5px;color:#204070;line-height:1.6}
.q-exp.show{display:block}
.quiz-final{text-align:center;padding:20px 0}

/* ---------- 底部导航 ---------- */
.pn-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.pn-card{border:2px solid var(--ink);border-radius:10px;background:#fff;padding:16px 20px;text-decoration:none;color:var(--ink);box-shadow:var(--hard);transition:.2s}
.pn-card:hover{transform:translateY(-3px);background:var(--yellow)}
.pn-card.next{text-align:right}
.pn-card small{font-size:12px;color:var(--ink2);font-weight:700}
.pn-card b{font-size:17px;display:block;margin-top:4px}

/* ---------- 首页 HERO 与模块 ---------- */
.index-hero{padding:54px 0 36px;position:relative;overflow:hidden}
.index-hero h1{font-size:clamp(56px,10vw,110px);line-height:0.95;margin:8px 0 10px;letter-spacing:6px}
.index-hero .lede{font-size:16.5px;color:var(--ink2);max-width:76ch;line-height:1.75}
.search-row{display:flex;gap:12px;align-items:center;margin-top:24px;flex-wrap:wrap}
.search-box{flex:1;min-width:260px}
.search-box input{width:100%;border:2.5px solid var(--ink);border-radius:10px;padding:12px 18px;font-size:16px;box-shadow:3px 3px 0 var(--ink);background:#fff}
.filters{display:flex;gap:6px}
.fbtn{border:2px solid var(--ink);background:#fff;border-radius:8px;padding:9px 16px;font-size:14px;font-weight:700;cursor:pointer;box-shadow:2px 2px 0 var(--ink);transition:.15s}
.fbtn.on{background:var(--ink);color:var(--yellow)}
.domain-filters{display:flex;gap:6px;flex-wrap:wrap;margin-top:14px}
.dbtn{border:1.6px solid var(--ink);background:#fff;border-radius:999px;padding:4px 12px;font-size:12.5px;font-weight:700;cursor:pointer;transition:.15s}
.dbtn.on{background:var(--terracotta);color:#fff;border-color:var(--terracotta)}

.school-tab{display:flex;gap:10px;margin:28px 0 18px;flex-wrap:wrap}
.school-tab .stab{border:2px solid var(--ink);background:#fff;border-radius:10px;padding:10px 18px;cursor:pointer;display:flex;gap:10px;align-items:center;box-shadow:3px 3px 0 rgba(27,42,74,.14);transition:.18s;font-family:inherit}
.school-tab .stab:hover{transform:translateY(-2px)}
.school-tab .stab.on{background:var(--ink);color:var(--yellow)}
.school-tab .stab b{font-size:16px}
.school-tab .stab small{font-size:11.5px;opacity:.75}

.mod-zone{margin:34px 0}
.mod-card{position:relative;border:2px solid var(--ink);border-radius:12px;background:var(--paper2);box-shadow:var(--hard);padding:18px 20px;margin-bottom:26px;overflow:hidden}
.mod-card::after{content:attr(data-no);position:absolute;right:6px;top:-26px;font-family:'ZCOOL QingKe HuangYou';font-size:110px;color:rgba(27,42,74,.05);pointer-events:none}
.mod-head{display:flex;align-items:center;gap:14px;flex-wrap:wrap;margin-bottom:14px}
.mod-emoji{width:46px;height:46px;border:2px solid var(--ink);border-radius:10px;display:grid;place-items:center;font-size:24px;background:#fff}
.mod-head h3{font-size:26px}
.mod-head .des{font-size:13px;color:var(--ink2)}
.mod-head .cnt{margin-left:auto;font-family:'IBM Plex Mono';font-size:12.5px;color:var(--ink2)}
.topic-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:12px}
.topic{display:flex;gap:10px;align-items:center;border:2px solid var(--ink);background:#fff;border-radius:9px;padding:10px 14px;text-decoration:none;color:var(--ink);box-shadow:3px 3px 0 rgba(27,42,74,.14);transition:.18s;font-size:14px;font-weight:700;min-width:0;min-height:48px}
.topic:hover{transform:translateY(-3px);background:var(--yellow)}
.topic .te{font-size:20px;flex-shrink:0}
.topic .tt{flex:1;min-width:0;line-height:1.4;word-break:break-word;color:var(--ink)}
.topic .tk{margin-left:auto;flex-shrink:0;font-size:11px;color:var(--ink2);font-weight:600;background:rgba(27,42,74,.08);border-radius:5px;padding:2px 7px;white-space:nowrap;max-width:130px;overflow:hidden;text-overflow:ellipsis}
.count-note{font-size:13px;color:var(--ink2);text-align:center;padding:20px 0}
.ios-hint{display:none;margin:0 0 22px;border:2px dashed var(--green);background:#eaf6ef;border-radius:10px;padding:12px 16px;font-size:13.5px;color:#245e46}
.ios-hint.show{display:block}

/* ---------- 进度徽章 ---------- */
.q-badge{font-size:11px;padding:1px 6px;border-radius:4px;font-family:'IBM Plex Mono','Noto Sans SC';font-weight:700;white-space:nowrap;margin-left:4px}
.q-badge.perfect{background:#e8f5e9;color:#2e7d32;border:1px solid #a5d6a7}
.q-badge.done{background:#fff8e1;color:#f57f17;border:1px solid #ffe082}
.chip.prog-chip{background:#e8f5e9;color:#1b5e20;border-color:#2e7d32;display:none}

/* ---------- 地理速查宝典抽屉 (Toolbox Drawer) ---------- */
.geo-drawer-mask{position:fixed;inset:0;background:rgba(10,20,35,.55);backdrop-filter:blur(3px);z-index:999;opacity:0;pointer-events:none;transition:opacity .25s ease;display:flex;justify-content:flex-end}
.geo-drawer-mask.open{opacity:1;pointer-events:auto}
.geo-drawer{width:min(620px,100vw);height:100%;height:100dvh;background:var(--paper);box-shadow:-6px 0 24px rgba(0,0,0,.35);border-left:2.5px solid var(--ink);display:flex;flex-direction:column;transform:translateX(100%);transition:.28s cubic-bezier(.16,1,.3,1);padding-bottom:env(safe-area-inset-bottom,0px)}
.geo-drawer-mask.open .geo-drawer{transform:translateX(0)}
.drawer-header{display:flex;align-items:center;justify-content:space-between;padding:12px 16px;padding-top:max(12px,calc(12px + env(safe-area-inset-top,0px)));border-bottom:2px solid var(--ink);background:var(--paper2)}
.drawer-tabs{display:flex;gap:6px;overflow-x:auto;scrollbar-width:none;-webkit-overflow-scrolling:touch}
.drawer-tabs::-webkit-scrollbar{display:none}
.dtab{border:1.8px solid var(--ink);background:#fff;border-radius:6px;padding:6px 12px;font-size:12.5px;font-weight:700;cursor:pointer;transition:.15s;color:var(--ink);white-space:nowrap;flex-shrink:0}
.dtab.on{background:var(--ink);color:var(--yellow)}
.drawer-close{width:32px;height:32px;border:2px solid var(--ink);border-radius:6px;background:#fff;font-size:16px;font-weight:900;cursor:pointer;display:grid;place-items:center;box-shadow:2px 2px 0 var(--ink);flex-shrink:0}
.drawer-close:hover{background:var(--terracotta);color:#fff}
.drawer-body{flex:1;overflow-y:auto;-webkit-overflow-scrolling:touch;padding:16px}
.const-table{width:100%;border-collapse:collapse;font-size:13px}
.const-table th{background:var(--ink);color:var(--yellow);padding:8px 10px;text-align:left;font-family:'IBM Plex Mono','Noto Sans SC'}
.const-table td{padding:8px 10px;border-bottom:1px solid rgba(27,42,74,.15)}
.const-table tr:hover{background:rgba(229,169,59,.15)}
.const-copy{cursor:pointer;border:1px solid var(--ink);background:#fff;border-radius:4px;padding:2px 8px;font-size:11.5px;margin-left:6px;font-family:inherit}
.const-copy:active{background:var(--yellow)}

.ref-card{background:#fff;border:2px solid var(--ink);border-radius:10px;box-shadow:3px 3px 0 rgba(27,42,74,.12);padding:14px 16px;margin-bottom:14px}
.ref-card-top{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px;flex-wrap:wrap}
.ref-title{font-size:15px;font-weight:800;color:var(--ink);display:flex;align-items:center;gap:6px}
.ref-badge{font-size:11px;background:var(--paper2);color:var(--ink);border:1.2px solid var(--ink);border-radius:4px;padding:1px 6px;font-weight:700}
.ref-formula{background:rgba(27,42,74,.05);border-left:4px solid var(--terracotta);border-radius:0 6px 6px 0;padding:8px 12px;margin:8px 0;font-family:'IBM Plex Mono','Noto Sans SC';font-size:13.5px;font-weight:700;color:var(--ink);overflow-x:auto}
.ref-cond{font-size:12.5px;color:var(--ink2);line-height:1.6;margin:6px 0}
.ref-memo{font-size:12.5px;background:#fef9e7;border:1px dashed #e5a93b;border-radius:6px;padding:6px 10px;color:#7a5a00;line-height:1.6;margin-top:6px}

.nav-tool-btn{background:var(--yellow);color:var(--ink);border:2px solid var(--ink);box-shadow:2px 2px 0 rgba(27,42,74,.25);border-radius:6px;font-size:12.5px;font-weight:800;cursor:pointer;padding:4px 10px;display:inline-flex;align-items:center;gap:4px}
.nav-tool-btn:hover{background:#ffe082}

/* ---------- 页脚 ---------- */
footer{background:var(--ink);color:var(--paper);padding:36px 0;border-top:3px solid var(--terracotta);font-size:13.5px}
footer .wrap{display:flex;justify-content:space-between;align-items:center;gap:20px;flex-wrap:wrap}
footer b{color:var(--yellow);font-size:16px}

/* ---------- 响应式布局 ---------- */
@media (max-width:920px){
  .grid2,.grid3,.pn-grid{grid-template-columns:1fr}
  .sec-note{margin-left:0}
  .t-grid{grid-template-columns:1fr}
  .calc-grid{grid-template-columns:repeat(2,1fr)}
}
@media (max-width:680px){
  .nav-links{display:none}
  .opts{grid-template-columns:1fr}
}
@media (max-width:640px){
  input[type="text"],input[type="number"],input[type="search"]{font-size:16px!important}
}