/* ============================================================
   生物互动课堂 · 核心视觉与样式系统 (Neo-Brutalism Organic Theme)
   设计语言：自然生命绿、黑板墨绿、阳光琥珀黄、活力珊瑚红
   ============================================================ */
:root{
  --paper:#f4f8f5; --paper2:#ffffff; --ink:#052e16; --ink2:#335c42;
  --red:#e11d48; --yellow:#f59e0b; --green:#15803d; --green-light:#86efac;
  --blue:#0284c7; --purple:#7c3aed;
  --board:#0a2918; --board2:#05180e; --chalk:#f0fdf4; --chalk-dim:#86efac;
  --hard:6px 6px 0 rgba(5,46,22,.16);
}
*{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(225,29,72,.06),transparent 60%),
    radial-gradient(700px 500px at -10% 30%,rgba(21,128,61,.08),transparent 60%),
    linear-gradient(rgba(5,46,22,.055) 1px,transparent 1px),
    linear-gradient(90deg,rgba(5,46,22,.055) 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(--green);width:0;z-index:99}
nav{position:sticky;top:0;z-index:90;background:rgba(244,248,245,.95);backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);border-bottom:2px solid var(--ink);padding-top:env(safe-area-inset-top, 0px)}
.nav-in{display:flex;align-items:center;gap:16px;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(--green-light);display:grid;place-items:center;border-radius:6px;box-shadow:2px 2px 0 var(--yellow);font-size:17px;font-weight:700}
.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:600;padding:6px 10px;white-space:nowrap;border-radius:6px;position:relative;transition:.2s}
.nav-links a:hover{background:rgba(21,128,61,.1)}
.nav-links a.active{color:var(--green);font-weight:700}
.nav-links a.active::after{content:'';position:absolute;left:10px;right:10px;bottom:2px;height:3px;background:var(--green);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 var(--ink)}
.install-btn.show{display:inline-flex}

/* ---------- 通用 ---------- */
.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(--red);color:#fff}
.btn.yellow{background:var(--yellow)}
.btn.green{background:var(--green);color:#fff}
.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(--green)}
.shead{display:flex;align-items:flex-end;gap:18px;flex-wrap:wrap;margin-bottom:32px;border-bottom:3px dashed rgba(5,46,22,.25);padding-bottom:16px}
.sec-no{font-family:'IBM Plex Mono';font-size:15px;color:#fff;border:2px solid var(--ink);padding:2px 9px;border-radius:5px;background:var(--green);flex:none;font-weight:700}
.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(--green);transform:rotate(-2deg)}
section{padding:56px 0}
section.tight{padding-top:24px}
.stamp{display:inline-block;font-family:'ZCOOL QingKe HuangYou';color:var(--green);border:3px solid var(--green);
  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(24px);transition:opacity .6s ease,transform .6s 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 ---------- */
.page-hero{padding:40px 0 28px;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(--green)}
.page-hero h1{font-size:clamp(40px,6.5vw,78px);line-height:1.05;margin:8px 0 4px;display:flex;gap:12px;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(--green);margin-bottom:10px;font-weight:700}
.page-hero .kicker::before{content:'';width:12px;height:12px;background:var(--green)}
.page-hero .sub{font-size:15.5px;color:var(--ink2);max-width:74ch}
.page-hero .tags{display:flex;gap:10px;flex-wrap:wrap;margin-top:14px}
.uline{width:180px;height:8px;margin:6px 0 10px;background:var(--green);border-radius:4px;transform:skewX(-12deg)}
.fsym{position:absolute;font-family:'IBM Plex Mono';font-weight:700;color:var(--ink);opacity:.08;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(5,46,22,.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:32px;height:32px;border-radius:8px;display:grid;place-items:center;font-size:16px;background:rgba(134,239,172,.35)}
.kcard p{font-size:14px;color:#284833}
.kcard .kex{margin-top:10px;font-size:12.5px;background:rgba(21,128,61,.08);border-left:3px solid var(--green);padding:7px 10px;border-radius:0 7px 7px 0;color:#166534}
.kcard:hover .kex{background:rgba(21,128,61,.14)}

/* ---------- 实验仿真面板 ---------- */
.demo-sec{background:linear-gradient(180deg,transparent,rgba(21,128,61,.04) 30%,transparent)}
.panel.demo{padding:22px;background:#fff;border:2px solid var(--ink);border-radius:12px;box-shadow:var(--hard)}
.demo-title{display:flex;align-items:center;justify-content:space-between;margin-bottom:8px;font-family:'ZCOOL QingKe HuangYou';font-size:24px}
.demo-desc{font-size:13.5px;color:var(--ink2);margin-bottom:16px}
.droot{margin-top:14px}

/* 核心实验探究卡片 */
.exp-panel{background:#fff;border:2px solid var(--ink);border-radius:12px;padding:22px;box-shadow:var(--hard)}
.exp-head{display:flex;align-items:center;gap:12px;margin-bottom:10px}
.exp-badge{background:var(--green);color:#fff;font-family:'IBM Plex Mono';font-size:12px;font-weight:700;padding:3px 10px;border-radius:6px;border:1.5px solid var(--ink)}
.exp-title{font-size:22px;margin:0}
.exp-principle{font-size:14px;margin-bottom:12px;background:rgba(21,128,61,.06);padding:10px 14px;border-radius:8px;border-left:4px solid var(--green)}
.exp-row{margin:10px 0;display:flex;align-items:center;flex-wrap:wrap;gap:6px}
.exp-tag-label{font-weight:700;font-size:13.5px}
.exp-block{margin-top:14px;background:#f9fcf9;border:1.5px solid #d1fae5;border-radius:8px;padding:12px 14px}
.exp-sub-title{font-weight:800;font-size:14px;color:var(--green);margin-bottom:6px;display:flex;align-items:center;gap:6px}
.exp-list{padding-left:20px;font-size:13.5px;line-height:1.7;color:#1e3a29}
.exp-list.error-list{color:#991b1b}
.exp-list.error-list li{margin-bottom:4px}

/* ---------- 核心图解·生理机理·法则 ---------- */
.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;padding:16px 18px;box-shadow:4px 4px 0 rgba(5,46,22,.12);position:relative}
.fx-top{display:flex;align-items:center;gap:8px;margin-bottom:8px}
.fx-top .fe{font-size:22px}
.fx-top .fn{font-weight:700;font-size:16px;color:var(--ink)}
.fx-eq{font-family:'IBM Plex Mono','Noto Sans SC',monospace;font-size:16px;font-weight:700;background:rgba(21,128,61,.08);padding:10px 14px;border-radius:8px;border-left:4px solid var(--green);margin:6px 0 8px;color:#064e3b;overflow-x:auto}
.fx-sub{font-size:13px;color:var(--ink2)}

/* ---------- 生活与现代科技应用 ---------- */
.app-card{background:#fff;border:2px solid var(--ink);border-radius:10px;padding:16px 18px;display:flex;gap:14px;align-items:flex-start;box-shadow:4px 4px 0 rgba(5,46,22,.1)}
.app-card .ae{font-size:28px;flex:none;width:40px;height:40px;display:grid;place-items:center;background:rgba(245,158,11,.15);border-radius:8px}
.app-card h5{font-size:16px;font-weight:700;margin-bottom:4px}
.app-card p{font-size:13.5px;color:var(--ink2);line-height:1.6}

/* ---------- 黑板解题笔记与例题 ---------- */
.board-sec{background:var(--board);color:var(--chalk);border-top:3px solid var(--ink);border-bottom:3px solid var(--ink)}
.board-sec .shead{border-bottom-color:rgba(240,253,244,.2)}
.board-sec .sec-title{color:#fff}
.board-sec .sec-sub{color:var(--chalk-dim)}
.board-sec .sec-note{color:var(--yellow)}
.t-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.chalk-panel{background:var(--board2);border:2px solid var(--chalk-dim);border-radius:10px;padding:20px;box-shadow:4px 4px 0 rgba(0,0,0,.4)}
.chalk-panel h3{font-size:21px;color:var(--yellow);margin-bottom:4px}
.chalk-panel .sub{font-size:13px;color:var(--chalk-dim);margin-bottom:12px}
.chalk-panel ol.steps{padding-left:22px;font-size:14px;line-height:1.8}
.chalk-panel .mistake{display:flex;flex-direction:column;gap:10px;font-size:13.5px}
.chalk-panel .mistake .no{color:#f87171;font-weight:700}
.chalk-panel .mistake .yes{color:#4ade80;font-weight:700}
.chalk-panel.oly-panel{grid-column:1/-1;border-color:var(--yellow)}
.chalk-panel.oly-panel h3{color:#fde047}
.oly-list{display:grid;grid-template-columns:repeat(auto-fit,minmax(280px,1fr));gap:14px;margin-top:8px}
.oly-item{background:rgba(255,255,255,.05);border-left:3px solid var(--yellow);padding:8px 12px;border-radius:0 6px 6px 0}
.oly-title{font-size:14px;color:#fde047;display:block;margin-bottom:4px}
.oly-desc{font-size:13px;color:var(--chalk-dim)}

/* 经典例题 */
.chalk-panel.ex-panel{background:#0d331f;border-color:#34d399}
.ex-list{display:flex;flex-direction:column;gap:18px;margin-top:10px}
.ex-card{background:rgba(0,0,0,.25);border:1.5px solid #059669;border-radius:8px;padding:16px}
.ex-top{display:flex;align-items:center;gap:10px;margin-bottom:10px}
.ex-badge{font-size:12px;font-weight:700;padding:2px 8px;border-radius:4px;color:#fff}
.ex-badge.zhongkao{background:#0284c7}
.ex-badge.gaokao{background:#e11d48}
.ex-badge.oly{background:#f59e0b;color:#000}
.ex-title{font-size:16px;font-weight:700;color:#fff}
.ex-stem{font-size:14px;line-height:1.7;margin-bottom:12px;color:var(--chalk)}
.ex-sec-title{font-size:13.5px;font-weight:700;margin:8px 0 4px;display:flex;align-items:center;gap:6px}
.ex-model{background:rgba(16,185,129,.15);border-left:3px solid #10b981;padding:8px 12px;border-radius:0 6px 6px 0;font-size:13.5px;color:#a7f3d0}
.ex-steps{padding-left:22px;font-size:13.5px;line-height:1.75;color:var(--chalk)}
.ex-summary{background:rgba(245,158,11,.15);border-left:3px solid var(--yellow);padding:8px 12px;border-radius:0 6px 6px 0;font-size:13.5px;color:#fde047}

.jue-card{margin-top:20px;border:2px dashed var(--yellow);border-radius:8px;padding:14px 20px;text-align:center;font-family:'Ma Shan Zheng';font-size:22px;color:var(--yellow);background:rgba(0,0,0,.3)}

/* ---------- 随堂测验 ---------- */
.quiz-head{display:flex;align-items:center;gap:14px;margin-bottom:20px;flex-wrap:wrap}
.score-chip{border:2px solid var(--ink);background:#fff;padding:6px 14px;border-radius:8px;font-size:14px;font-weight:700;box-shadow:2px 2px 0 var(--ink)}
.score-chip b{color:var(--green);font-size:17px}
#quizBox{display:flex;flex-direction:column;gap:18px}
.q-card{padding:20px;background:#fff}
.q-top{display:flex;align-items:center;gap:10px;margin-bottom:10px}
.q-no{font-family:'IBM Plex Mono';font-weight:800;color:var(--green);font-size:15px}
.q-tag{font-size:12px;padding:2px 8px;border-radius:4px;background:rgba(21,128,61,.1);color:var(--green);font-weight:700}
.q-stem{font-size:15.5px;font-weight:600;margin-bottom:14px;line-height:1.7}
.opts{display:grid;grid-template-columns:1fr;gap:10px}
.opt{text-align:left;border:2px solid var(--ink);border-radius:8px;background:#f8faf8;padding:10px 14px;font-size:14px;font-weight:500;cursor:pointer;transition:.15s;box-shadow:2px 2px 0 var(--ink)}
.opt:hover:not(:disabled){transform:translate(-1px,-1px);box-shadow:3px 3px 0 var(--ink);background:#fff}
.opt.correct{background:#dcfce7;border-color:#15803d;color:#14532d;font-weight:700}
.opt.wrong{background:#fee2e2;border-color:#dc2626;color:#991b1b}
.q-exp{display:none;margin-top:12px;background:#f0fdf4;border-left:4px solid var(--green);padding:10px 14px;font-size:13.5px;line-height:1.65;border-radius:0 8px 8px 0;color:#166534}
.q-exp.show{display:block}
.quiz-final{text-align:center;margin-top:24px}

/* ---------- 底部上下篇导航 ---------- */
.pnav-sec{padding:32px 0 60px}
.pn-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.pn-card{border:2px solid var(--ink);border-radius:10px;background:#fff;padding:16px 20px;text-decoration:none;color:var(--ink);box-shadow:4px 4px 0 var(--ink);transition:.15s}
.pn-card:hover{transform:translate(-2px,-2px);box-shadow:6px 6px 0 var(--ink);background:#f0fdf4}
.pn-card.disabled{opacity:.4;pointer-events:none}
.pn-card small{font-family:'IBM Plex Mono';font-size:12px;color:var(--ink2);font-weight:700}
.pn-card b{font-size:17px;display:block;margin-top:4px}
.pn-card.next{text-align:right}

/* ---------- 首页特定样式 ---------- */
.index-hero{padding:50px 0 36px;position:relative;overflow:hidden}
.index-hero h1{font-size:clamp(52px,9vw,98px);line-height:1;margin:12px 0 8px;letter-spacing:6px;color:var(--ink)}
.index-hero .lede{font-size:17px;color:var(--ink2);max-width:76ch;line-height:1.75;margin:16px 0}
.search-row{display:flex;gap:12px;margin:24px 0 14px;flex-wrap:wrap}
.search-box{flex:1;min-width:280px}
.search-box input{width:100%;padding:12px 18px;border:2.5px solid var(--ink);border-radius:10px;font-size:15px;font-weight:600;font-family:inherit;box-shadow:3px 3px 0 var(--ink);outline:none;background:#fff}
.search-box input:focus{border-color:var(--green);box-shadow:4px 4px 0 var(--green)}
.filters{display:flex;gap:8px;align-items:center}
.fbtn{border:2px solid var(--ink);background:#fff;padding:8px 16px;border-radius:8px;font-size:14px;font-weight:700;cursor:pointer;box-shadow:2px 2px 0 var(--ink);transition:.15s}
.fbtn.on{background:var(--green);color:#fff}
.domain-filters{display:flex;gap:8px;flex-wrap:wrap;margin:12px 0 20px}
.dbtn{border:1.6px solid var(--ink);background:#fff;padding:6px 14px;border-radius:999px;font-size:13px;font-weight:700;cursor:pointer;box-shadow:2px 2px 0 rgba(5,46,22,.15);transition:.15s}
.dbtn.on{background:var(--ink);color:var(--green-light)}
.school-tab{display:flex;gap:12px;margin:24px 0;border-bottom:2px solid var(--ink);padding-bottom:12px}
.stab{border:2px solid var(--ink);background:#fff;padding:10px 20px;border-radius:10px;font-size:15px;font-weight:700;cursor:pointer;box-shadow:3px 3px 0 var(--ink);transition:.15s;text-align:left}
.stab small{display:block;font-size:11.5px;color:var(--ink2);font-weight:500}
.stab.on{background:var(--green);color:#fff}
.stab.on small{color:#dcfce7}
.mod-zone{margin-bottom:36px}
.mod-card{background:#fff;border:2.5px solid var(--ink);border-radius:14px;padding:24px;box-shadow:6px 6px 0 var(--ink)}
.mod-head{display:flex;align-items:center;gap:14px;margin-bottom:18px;border-bottom:2px solid #e2ece5;padding-bottom:14px}
.mod-emoji{font-size:36px;width:52px;height:52px;display:grid;place-items:center;background:rgba(21,128,61,.1);border-radius:10px;border:2px solid var(--ink);flex:none}
.mod-head h3{font-size:24px;margin:0}
.mod-head .des{font-size:13px;color:var(--ink2)}
.mod-head .cnt{margin-left:auto;font-family:'IBM Plex Mono';font-size:12.5px;font-weight:700;background:#f0fdf4;padding:4px 10px;border-radius:6px;border:1px solid #bbf7d0;color:var(--green)}
.topic-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:12px}
.topic{display:flex;align-items:center;gap:10px;border:2px solid var(--ink);border-radius:8px;background:#f9fcf9;padding:10px 14px;text-decoration:none;color:var(--ink);font-size:14px;font-weight:700;box-shadow:2px 2px 0 var(--ink);transition:.15s;position:relative}
.topic:hover{background:#fff;transform:translate(-1px,-1px);box-shadow:3px 3px 0 var(--ink);color:var(--green)}
.topic .te{font-size:18px}
.topic .tk{font-family:'IBM Plex Mono';font-size:11px;color:var(--ink2);margin-left:auto;font-weight:600}
.q-badge{font-size:11px;font-weight:700;padding:1px 6px;border-radius:4px;margin-left:6px}
.q-badge.done{background:#dcfce7;color:#166534;border:1px solid #86efac}
.q-badge.perfect{background:#fef08a;color:#854d0e;border:1px solid #fde047}
.prog-chip{background:#f0fdf4;border-color:var(--green);color:var(--green);font-weight:700}
.count-note{font-size:14px;color:var(--ink2);text-align:center;margin:28px 0;font-weight:600}

/* ---------- 抽屉工具箱 ---------- */
.drawer-backdrop{position:fixed;top:0;left:0;right:0;bottom:0;background:rgba(5,46,22,.5);z-index:200;display:none;backdrop-filter:blur(3px)}
.drawer-backdrop.show{display:block}
.drawer{position:fixed;top:0;right:0;width:min(580px,100vw);height:100vh;background:#fff;border-left:3px solid var(--ink);z-index:210;display:flex;flex-direction:column;box-shadow:-6px 0 24px rgba(0,0,0,.2);transform:translateX(100%);transition:transform .3s cubic-bezier(.16,1,.3,1)}
.drawer.show{transform:none}
.drawer-head{padding:18px 22px;border-bottom:2px solid var(--ink);display:flex;align-items:center;justify-content:space-between;background:var(--paper)}
.drawer-head h3{font-size:22px;margin:0;display:flex;align-items:center;gap:8px}
.drawer-close{border:2px solid var(--ink);background:#fff;border-radius:6px;width:32px;height:32px;display:grid;place-items:center;cursor:pointer;font-weight:800;box-shadow:2px 2px 0 var(--ink)}
.drawer-tabs{display:flex;border-bottom:2px solid var(--ink);background:#f0fdf4}
.dtab{flex:1;padding:12px 10px;text-align:center;font-size:13.5px;font-weight:700;cursor:pointer;border-bottom:3px solid transparent;background:none;border-top:none;border-left:none;border-right:none}
.dtab.on{border-bottom-color:var(--green);color:var(--green);background:#fff}
.drawer-body{flex:1;overflow-y:auto;padding:20px;background:#fafdfa}
.dtab-pane{display:none}
.dtab-pane.on{display:block}

/* 页脚 */
footer{border-top:2px solid var(--ink);background:#052e16;color:#f0fdf4;padding:36px 0;margin-top:60px}
footer .wrap{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:20px;font-size:14px;color:#a7f3d0}
footer b{color:#fff;font-size:16px}
.ios-hint{display:none;background:#fef08a;border:2px solid var(--ink);border-radius:8px;padding:10px 14px;margin:12px auto;max-width:1160px;font-size:13px;color:#854d0e;box-shadow:3px 3px 0 var(--ink)}
.ios-hint.show{display:block}

@media(max-width:768px){
  .grid2,.grid3,.t-grid,.pn-grid{grid-template-columns:1fr}
  .shead{align-items:flex-start}
  .sec-note{margin-left:0}
  .mod-head{flex-wrap:wrap}
  .mod-head .cnt{margin-left:0}
}