/* ============================================================
   汉教Html工坊 · 资源库样式
   取色沿用各工具页的靛墨 / 纸底配色，只做排版与留白
   ============================================================ */
:root{
  /* 薄荷绿主色 + 米白纸底；分区用小面积点缀色，正文对比度 ≥ 7:1 */
  --ink:#123528;
  --ink-soft:#5f7269;
  --paper:#f2faf5;
  --card:#ffffff;
  --rule:#dcebe2;
  --rule-soft:#e9f3ed;
  --brand:#1f6b4f;
  --brand-deep:#17573f;
  --brand-soft:#e7f3ec;
  --brand-line:#c9e3d6;
  --line:#e3efe8;
  --study:#3c7d92;
  --prep:#1f6b4f;
  --fun:#a8763c;
  /* 毛玻璃：面板=半透白 + 背景模糊；只在「层次」上用，不用来炫技 */
  --glass:rgba(255,255,255,.82);
  --glass-line:rgba(255,255,255,.62);
  --bg-base:#f1faf4;
  --blur:saturate(1.15) blur(16px);
  --shadow-1:0 1px 2px rgba(20,70,52,.04), 0 8px 22px rgba(20,70,52,.06);
  --shadow-2:0 18px 40px rgba(20,70,52,.14);
  --serif:"Palatino Linotype","Palatino","Book Antiqua","Songti SC","Georgia",serif;
  --sans:"PingFang SC","Hiragino Sans GB","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
}
*{box-sizing:border-box}
html{-webkit-text-size-adjust:100%}
body{
  margin:0;color:var(--ink);
  /* 薄荷柔光铺在米白纸底上当「景」，整站保持一个清爽的绿调 */
  background:
    radial-gradient(980px 460px at 8% -12%, rgba(163,220,192,.42), transparent 62%),
    radial-gradient(820px 420px at 96% -2%, rgba(203,236,217,.50), transparent 62%),
    radial-gradient(900px 520px at 50% 108%, rgba(178,226,203,.32), transparent 66%),
    linear-gradient(180deg,#f9fdfa 0%,var(--bg-base) 48%,#e9f6ee 100%);
  background-attachment:fixed;
  font-family:var(--sans);font-size:15px;line-height:1.8;
  -webkit-font-smoothing:antialiased;
  transition:background-color .25s ease,color .25s ease;
}
a{color:inherit;text-decoration:none}
.wrap{max-width:1500px;margin:0 auto;padding:40px 28px 64px}

/* 按钮按下去有小反馈（不是花哨动效，只让人知道"点到了"） */
.cta:active,.acct button:active,.acct a:active,.theme-toggle:active{transform:scale(.985)}
@media (prefers-reduced-motion:reduce){
  *{transition-duration:.01ms!important;animation-duration:.01ms!important}
}

/* ---------- 顶部导航条：毛玻璃，滚动时透着下面的内容但不糊字 ---------- */
.topbar{position:sticky;top:0;z-index:60;background:rgba(255,255,255,.72);
  -webkit-backdrop-filter:var(--blur);backdrop-filter:var(--blur);
  border-bottom:1px solid var(--line)}
.topbar{background:rgba(255,255,255,.86);border-bottom-color:var(--rule-soft)}
.topbar-in{max-width:1500px;margin:0 auto;padding:11px 28px;display:flex;align-items:center;
  justify-content:space-between;gap:14px;flex-wrap:wrap;position:relative}
.brand{display:inline-flex;align-items:center;gap:10px;min-width:0}
.brand-badge{display:inline-flex;align-items:center;justify-content:center;flex:none;
  width:30px;height:30px;border-radius:9px;background:var(--brand-soft);color:var(--brand)}
.brand-badge svg{width:18px;height:18px}
.brand-txt{display:flex;align-items:baseline;gap:6px;line-height:1.25;min-width:0}
.brand-txt b{font-size:15px;font-weight:700;color:var(--ink);letter-spacing:.01em}
.brand-txt i{font-style:normal;font-size:11.5px;color:var(--ink-soft)}
.brand:hover .brand-txt b{color:var(--brand)}

/* 顶部导航：分区入口 + 学生账号；手机上收进汉堡菜单 */
.nav{display:flex;align-items:center;gap:20px;font-size:14px;color:var(--ink-soft)}
.nav a{font-weight:600;transition:color .16s}
.nav a:hover{color:var(--brand)}
.nav-toggle{display:none;flex-direction:column;align-items:center;justify-content:center;gap:4px;
  width:40px;height:40px;padding:0;cursor:pointer;background:#fff;border:1px solid var(--rule);
  border-radius:12px;transition:border-color .16s,background .16s}
.nav-toggle span{display:block;width:18px;height:2px;border-radius:2px;background:var(--ink)}
.nav-toggle:hover{border-color:var(--brand-line);background:var(--brand-soft)}
.nav-toggle:focus-visible{outline:2px solid var(--brand);outline-offset:2px}
@media (max-width:620px){
  .brand-txt i{display:none}
  .topbar-in{padding:8px 16px;flex-wrap:nowrap}
  /* 手机上把「登录后…」那行说明收掉，导航条只占一行，别挡内容 */
  .topbar .acct .hintx{display:none}
  .topbar .acct button,.topbar .acct a.acct-btn{padding:7px 13px}
}

.eyebrow{font-size:12.5px;letter-spacing:.24em;color:var(--ink-soft);margin:0 0 12px}
h1{font-family:var(--serif);font-weight:600;font-size:38px;line-height:1.3;margin:0 0 16px;letter-spacing:.01em;
  text-wrap:balance}
.hero h1{max-width:26ch}
.wrap[class*="zone--"] h1::before{
  content:'';display:inline-block;width:11px;height:11px;border-radius:3px;
  background:var(--zc);margin-right:12px;vertical-align:middle;position:relative;top:-3px;
}
.lede{font-size:15.5px;color:var(--ink-soft);margin:0;max-width:58ch;text-wrap:pretty}

.back{display:inline-block;font-size:13px;color:var(--ink-soft);margin-bottom:22px;padding:5px 12px;
  border:1px solid var(--rule);border-radius:999px;background:rgba(255,255,255,.6);transition:color .16s,border-color .16s}
.back:hover{color:var(--ink);border-color:var(--ink-soft)}

/* ---------- 顶部一行：返回 / 学生账号（分区页） ---------- */
.topline{display:flex;align-items:center;justify-content:space-between;gap:14px;flex-wrap:wrap;margin-bottom:22px;
  background:var(--glass);-webkit-backdrop-filter:var(--blur);backdrop-filter:var(--blur);
  border:1px solid var(--glass-line);border-radius:12px;padding:8px 14px;box-shadow:var(--shadow-1)}
.topline .back{margin-bottom:0}
.topline-only{justify-content:flex-end;margin-bottom:16px}

/* ---------- 首页三个分区 ---------- */
/* ---------- 页头：左文案 + 右信息卡（一屏只留一个主按钮） ---------- */
.hero{display:grid;grid-template-columns:minmax(0,1fr) 300px;gap:46px;align-items:center;margin-bottom:40px}
.hero-text{min-width:0}
.hero .lede{margin-top:2px;font-size:16px;max-width:62ch}
.hero h1{font-size:40px}
/* 首页任务入口：主按钮 = 开始备一节课；另外两个入口降级成文字链接 */
.cta-row{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.cta{display:inline-flex;align-items:center;gap:8px;font-size:14px;font-weight:600;text-decoration:none;
  padding:12px 20px;border-radius:10px;border:1px solid transparent;transition:transform .16s,box-shadow .16s,background .16s}
.cta-primary{background:var(--brand);color:#fff;padding:14px 26px;font-size:15px;
  box-shadow:0 4px 14px rgba(47,122,85,.26)}
.cta-primary:hover{background:var(--brand-deep);transform:translateY(-1px);box-shadow:0 8px 20px rgba(47,122,85,.3)}
.cta-ghost{background:var(--card);color:var(--ink);border-color:var(--rule)}
.cta-ghost:hover{border-color:var(--brand);color:var(--brand)}
.cta-links{display:flex;flex-wrap:wrap;gap:20px;margin:14px 0 0}
.cta-links a{display:inline-flex;align-items:center;gap:6px;font-size:13.5px;font-weight:600;color:var(--brand);
  border-bottom:1px solid transparent;padding-bottom:1px;transition:border-color .16s,color .16s}
.cta-links a:hover{border-bottom-color:var(--brand);color:var(--brand-deep)}
.cta-links .ar{transition:transform .18s}
.cta-links a:hover .ar{transform:translateX(3px)}
.cta-hint{margin:12px 0 0;font-size:12.5px;color:var(--ink-soft)}
.facts-card{background:var(--glass);-webkit-backdrop-filter:var(--blur);backdrop-filter:var(--blur);
  border:1px solid var(--glass-line);border-radius:16px;padding:18px 20px;box-shadow:var(--shadow-1)}
.facts-title{margin:0 0 10px;font-size:11.5px;font-weight:700;letter-spacing:.14em;color:var(--ink-soft)}
.facts{margin:0;padding:0;list-style:none}
.facts > div{display:grid;grid-template-columns:82px 1fr;gap:12px;align-items:baseline;
  padding:9px 0;border-top:1px solid var(--rule-soft)}
.facts > div:first-child{border-top:0;padding-top:0}
.facts dt{font-size:13px;font-weight:700;color:var(--brand);white-space:nowrap}
.facts dd{margin:0;font-size:12.5px;color:var(--ink-soft)}
@media (max-width:620px){
  .cta-row{gap:8px}
  .cta-primary{flex:1 1 100%;justify-content:center}
  .cta-links{gap:14px}
}

/* 三张卡各自按内容高（不拉成一样高，免得短卡下面空一大片），底部的「进入…」仍然在卡内底部 */
.zones{display:grid;grid-template-columns:repeat(3,1fr);gap:18px;margin-top:0;align-items:start}
.zone{display:flex;flex-direction:column;background:var(--glass);
  -webkit-backdrop-filter:var(--blur);backdrop-filter:var(--blur);
  border:1px solid var(--glass-line);
  border-radius:14px;padding:26px 24px 24px;box-shadow:var(--shadow-1);
  transition:transform .22s cubic-bezier(.2,.7,.3,1),border-color .22s,box-shadow .22s}
/* 区块之间的区别靠这枚小标签和下面的小圆点，不用顶部彩色粗边框 */
.zone .zlabel{align-self:flex-start;display:inline-flex;align-items:center;gap:7px;
  font-family:var(--sans);font-size:11.5px;font-weight:700;letter-spacing:.1em;
  color:var(--zc);background:var(--zc-soft);border-radius:999px;padding:5px 12px}
.zone .zlabel::before{content:'';width:6px;height:6px;border-radius:50%;background:currentColor;flex:none}
.zone h2{font-family:var(--serif);font-weight:600;font-size:25px;margin:14px 0 10px}
.zone .zdesc{font-size:13.5px;color:var(--ink-soft);margin:0 0 16px}
/* 一行一个工具：名字在左、说明缩成右侧小标签，不用圆点和分隔线（信息不丢，密度降下来） */
.zone .tools{list-style:none;margin:0 0 16px;padding:0;font-size:13.5px}
.zone .tools li{display:flex;align-items:baseline;justify-content:space-between;gap:12px;
  padding:6px 8px;border-radius:8px;color:var(--ink);line-height:1.5;transition:background .16s}
.zone .tools li + li{margin-top:1px}
/* 右侧统一做成浅色小徽章，一眼就知道这列是「规模 / 级别」 */
.zone .tools small{flex:none;color:#75818f;font-size:11px;margin:0;text-align:right;white-space:nowrap;
  background:#f3f6f8;border-radius:6px;padding:2px 8px;line-height:1.5;letter-spacing:.01em}
@media (hover:hover){
  .zone .tools li:hover{background:#f5f8fa}
}
.zone .znote{font-size:12.5px;color:var(--ink-soft);margin:16px 0 0;line-height:1.75}
.zone .go{margin-top:auto;padding-top:16px;font-size:13.5px;font-weight:700;color:var(--zc);transition:transform .22s}
.zone--study{--zc:var(--study);--zc-soft:#ecf3f8}
.zone--prep{--zc:var(--brand);--zc-soft:var(--brand-soft)}
.zone--fun{--zc:var(--fun);--zc-soft:#faf3e8}

/* ---------- 工具卡 ---------- */
.grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px;margin-top:34px}
.tool{display:flex;flex-direction:column;background:var(--glass);
  -webkit-backdrop-filter:var(--blur);backdrop-filter:var(--blur);
  border:1px solid var(--glass-line);
  border-radius:14px;padding:24px 22px 20px;box-shadow:var(--shadow-1);
  transition:transform .22s cubic-bezier(.2,.7,.3,1),border-color .22s,box-shadow .22s}
.tool h3{font-family:var(--serif);font-weight:600;font-size:19px;margin:0 0 10px;transition:color .22s}
/* 分区的颜色只留一个小色块，不再用整条彩色边 */
.tool h3::before{content:'';display:inline-block;width:8px;height:8px;border-radius:3px;
  background:var(--zc,var(--study));margin-right:10px;vertical-align:middle;position:relative;top:-2px}
.tool p{font-size:13.5px;color:var(--ink-soft);margin:0 0 12px}
.tags{display:flex;flex-wrap:wrap;gap:6px;margin:0 0 14px}
.tag{font-size:11.5px;color:var(--ink-soft);border:1px solid var(--rule);border-radius:3px;padding:1px 7px;white-space:nowrap}
.tool .go{margin-top:auto;font-size:13.5px;font-weight:600;color:var(--zc,var(--study));
  transition:transform .22s,letter-spacing .22s}
.tool.wide{grid-column:1/-1}
.tool.wide p{max-width:82ch}

/* ---------- 悬停 / 键盘聚焦的视觉反馈 ---------- */
@media (hover:hover){
  a.tool:hover{transform:translateY(-4px);border-color:var(--zc,var(--study));
    box-shadow:var(--shadow-2)}
  a.tool:hover h3{color:var(--zc,var(--study))}
  a.tool:hover .go{transform:translateX(5px)}
  .zone:hover{transform:translateY(-4px);border-color:var(--glass-line);box-shadow:var(--shadow-2)}
  .zone:hover .go{transform:translateX(5px)}
  .zone:hover .tools li{color:var(--ink)}
  .note a:hover{border-bottom-color:var(--ink-soft)}
}
a.tool:active,.zone:active{transform:translateY(-1px)}
a.tool:focus-visible,.zone:focus-visible,.back:focus-visible,.foot a:focus-visible{
  outline:2px solid var(--zc,var(--study));outline-offset:3px}

/* ---------- 说明与页脚 ---------- */
.prose{max-width:78ch}
.prose h2{font-family:var(--serif);font-weight:600;font-size:19px;margin:28px 0 8px}
.prose h2:first-child{margin-top:6px}
.prose p{font-size:14px;color:var(--ink-soft);margin:0 0 8px}
.prose ul{margin:0 0 8px;padding-left:20px}
.prose li{font-size:14px;color:var(--ink-soft);margin:3px 0;line-height:1.85}
.prose b{color:var(--ink);font-weight:600}
.prose .key{border:1px solid var(--glass-line);border-left:3px solid var(--study);border-radius:10px;
  background:var(--glass);-webkit-backdrop-filter:var(--blur);backdrop-filter:var(--blur);
  padding:14px 18px;margin:16px 0;font-size:14px;color:var(--ink)}
.prose a{color:var(--ink);border-bottom:1px solid var(--rule)}
.prose a:hover{border-bottom-color:var(--ink-soft)}

.note{margin-top:34px;border-top:1px solid var(--rule);border-bottom:1px solid var(--rule);
  padding:16px 2px;font-size:13.5px;color:var(--ink-soft);max-width:112ch}
.note a{color:var(--ink);border-bottom:1px solid var(--rule)}
.foot{margin-top:30px;font-size:12.5px;color:var(--ink-soft);display:flex;justify-content:space-between;
  gap:12px;flex-wrap:wrap}
.foot b{font-weight:600;color:var(--ink)}
.foot a{border-bottom:1px solid var(--rule)}
.foot a:hover{border-bottom-color:var(--ink-soft)}

@media (max-width:860px){
  .wrap{padding:24px 18px 48px}
  h1{font-size:30px}
  .hero h1{font-size:30px}
  .hero{grid-template-columns:1fr;gap:22px;align-items:start;margin-bottom:28px}
  .hero .lede br{display:none}
  .facts > div{grid-template-columns:76px 1fr;gap:10px;padding:7px 0}
  .facts-card{padding:16px 18px}
  .zones,.grid{grid-template-columns:1fr}
  .zones{margin-top:28px;gap:14px}
  .grid{gap:14px}
  .zone,.tool{padding:22px 20px 20px}
}
@media print{
  body{background:#fff}
  .back{display:none}
}

/* ============================================================
   护眼模式（深咖 + 米黄）：夜里备课用，降低屏幕亮度与蓝光感
   由 assets/theme.js 在 <html> 上打 data-theme="dim"，记在本机
   ============================================================ */
html[data-theme="dim"]{
  color-scheme:dark;
  --ink:#f0e7d9;
  --ink-soft:#c2b5a3;
  --paper:#241e19;
  --card:#312922;
  --rule:#4a3f35;
  --rule-soft:#3e342c;
  --brand:#8fbfa4;
  --brand-deep:#a8d2ba;
  --brand-soft:rgba(143,191,164,.14);
  --brand-line:rgba(143,191,164,.28);
  --line:#3a312a;
  --study:#8fb0c9;
  --prep:#8fbfa4;
  --fun:#d5a877;
  --glass:rgba(58,48,40,.72);
  --glass-line:rgba(255,255,255,.07);
  --bg-base:#241e19;
  --shadow-1:0 1px 2px rgba(0,0,0,.24), 0 8px 22px rgba(0,0,0,.20);
  --shadow-2:0 20px 46px rgba(0,0,0,.34);
}
html[data-theme="dim"] body{
  background:
    radial-gradient(920px 430px at 10% -10%, rgba(90,124,146,.20), transparent 62%),
    radial-gradient(760px 380px at 92% 2%, rgba(160,116,74,.16), transparent 60%),
    radial-gradient(900px 520px at 48% 106%, rgba(74,116,96,.18), transparent 64%),
    linear-gradient(180deg,#2b241e 0%,var(--bg-base) 48%,#1e1915 100%);
}
html[data-theme="dim"] .topbar{background:rgba(36,30,25,.74);border-bottom-color:var(--line)}
html[data-theme="dim"] .zone--study{--zc:var(--study);--zc-soft:rgba(143,176,201,.14)}
html[data-theme="dim"] .zone--prep{--zc:var(--brand);--zc-soft:rgba(143,191,164,.14)}
html[data-theme="dim"] .zone--fun{--zc:var(--fun);--zc-soft:rgba(213,168,119,.14)}
html[data-theme="dim"] .facts dt{color:var(--brand)}
html[data-theme="dim"] .zone .tools small{background:rgba(255,255,255,.07);color:#c8bba9}
html[data-theme="dim"] .zone .tools li{color:var(--ink)}
html[data-theme="dim"] .zone .tools li:hover{background:rgba(255,255,255,.05)}
html[data-theme="dim"] .back{background:rgba(255,255,255,.06);border-color:var(--rule)}
html[data-theme="dim"] .cta-primary{color:#1c2a22}
html[data-theme="dim"] .cta-ghost{background:rgba(255,255,255,.06);color:var(--ink);border-color:var(--rule)}
html[data-theme="dim"] .note{border-color:var(--rule)}
html[data-theme="dim"] .note a,html[data-theme="dim"] .fact a{color:var(--ink)}
html[data-theme="dim"] .zone .go,html[data-theme="dim"] .tool .go{color:var(--zc)}
html[data-theme="dim"] h1,html[data-theme="dim"] h2,html[data-theme="dim"] h3{color:var(--ink)}

/* 护眼模式开关（theme.js 注入，所有挂了脚本的页面都有） */
.theme-toggle{position:fixed;right:12px;bottom:12px;z-index:86;cursor:pointer;
  font:600 12.5px/1 var(--sans);color:var(--ink);background:var(--glass);
  -webkit-backdrop-filter:var(--blur);backdrop-filter:var(--blur);
  border:1px solid var(--glass-line);border-radius:999px;padding:9px 14px;
  box-shadow:var(--shadow-1);transition:transform .16s,box-shadow .16s,background .16s}
.theme-toggle:hover{transform:translateY(-1px);box-shadow:var(--shadow-2)}
.theme-toggle.up{bottom:56px}          /* 该页有底部账号胶囊时往上让一格 */
.theme-toggle:focus-visible{outline:2px solid var(--brand);outline-offset:3px}
@media print{.theme-toggle{display:none!important}}

/* ============================================================
   首页横幅（按参考稿重排）
   薄荷绿柔光底 + 左侧价值主张与主按钮 + 右侧三个入口卡
   ============================================================ */
.hero-banner{position:relative;overflow:hidden;border-radius:30px;padding:66px 40px 70px;
  min-height:440px;display:flex;align-items:stretch;justify-content:center;text-align:center;
  background:linear-gradient(180deg,#fcfffd 0%,#f1faf4 58%,#e8f6ee 100%);
  border:1px solid rgba(31,107,79,.09);
  box-shadow:0 18px 46px rgba(20,70,52,.10)}
.hb-shape{position:absolute;pointer-events:none}
.hb-shape-a{width:660px;height:660px;right:-170px;bottom:-390px;border-radius:50%;
  background:radial-gradient(circle at 50% 50%,rgba(186,228,206,.55),rgba(186,228,206,0) 70%)}
.hb-shape-b{width:520px;height:520px;left:-190px;bottom:-300px;border-radius:50%;
  background:radial-gradient(circle at 50% 50%,rgba(216,240,226,.62),rgba(216,240,226,0) 70%)}
.hb-shape-desk{left:18%;right:18%;bottom:-96px;height:170px;border-radius:50%;
  background:linear-gradient(180deg,rgba(255,255,255,.72),rgba(226,242,232,.45));
  box-shadow:0 -1px 0 rgba(255,255,255,.8)}
.hb-shape-plant{width:220px;height:220px;left:-40px;bottom:-60px;border-radius:50%;
  background:radial-gradient(circle at 42% 32%,rgba(146,203,172,.36),rgba(146,203,172,0) 72%);
  filter:blur(10px)}
/* 标题后的柔光：让大标题像浮在光里，是这一版的主角 */
.hb-glow{position:absolute;left:50%;top:46%;transform:translate(-50%,-50%);width:880px;height:580px;
  border-radius:50%;pointer-events:none;
  background:radial-gradient(closest-side,rgba(255,255,255,.95),rgba(255,255,255,.55) 62%,rgba(255,255,255,0) 100%)}
.hb-in{position:relative;z-index:1;width:100%;display:flex;align-items:center;justify-content:center}
.hb-copy{max-width:min(780px,calc(100% - 580px));margin:0 auto;min-width:0}
.hb-copy h1{margin:0 0 28px;font-family:var(--sans);font-weight:800;font-size:46px;line-height:1.34;
  letter-spacing:.01em;color:#0f3225;text-wrap:balance}
.btn-primary{display:inline-flex;align-items:center;gap:10px;background:var(--brand);color:#fff;
  font-size:17px;font-weight:600;padding:17px 34px;border-radius:14px;
  box-shadow:0 10px 24px rgba(31,107,79,.22);
  transition:transform .18s,box-shadow .18s,background .18s}
.btn-primary .ar{transition:transform .18s}
.btn-primary:hover{background:var(--brand-deep);transform:translateY(-1px);box-shadow:0 14px 30px rgba(31,107,79,.26)}
.btn-primary:hover .ar{transform:translateX(4px)}
.hb-note{margin:22px 0 0;font-size:13.5px;color:#6d8a7e;line-height:1.7}
/* 三张轻量浮层卡片：白底小圆角 + 细边 + 柔和投影，围在标题两侧 */
.hb-float{position:absolute;inset:0;pointer-events:none}
.fcard{--rot:0deg;position:absolute;pointer-events:auto;display:grid;grid-template-columns:auto 1fr auto;
  align-items:center;gap:11px;width:248px;padding:15px 17px;background:#fff;
  border:1px solid rgba(31,107,79,.10);border-radius:15px;box-shadow:0 14px 34px rgba(20,70,52,.12);
  transform:translateY(0) rotate(var(--rot));
  animation:fcard-float 6.5s ease-in-out infinite;
  transition:transform .22s cubic-bezier(.2,.7,.3,1),box-shadow .22s,border-color .22s}
.fcard-ico{display:inline-flex;align-items:center;justify-content:center;width:46px;height:46px;
  border-radius:50%;background:var(--brand-soft);color:var(--brand)}
.fcard-ico svg{width:23px;height:23px}
.fcard-body{text-align:left}
.fcard-body b{display:block;font-size:16px;font-weight:700;color:#123528}
.fcard-body small{display:block;margin-top:2px;font-size:12.5px;color:#7d9188;white-space:nowrap}
.fcard-ar{color:#a6b8b0;font-size:18px;line-height:1}
/* 错落摆放：左中、右上、右下，轻微倾斜做出「浮层」感 */
.fcard--study{left:6px;top:40%;--rot:-5deg}
.fcard--prep{right:6px;top:7%;--rot:4deg;animation-delay:-2.2s}
.fcard--fun{right:6px;bottom:12%;--rot:-4deg;animation-delay:-4.4s}
/* 轻微上下浮动：三张卡错开节奏，像漂在光里 */
@keyframes fcard-float{
  0%,100%{transform:translateY(0) rotate(var(--rot))}
  50%{transform:translateY(-7px) rotate(var(--rot))}
}
@media (hover:hover){
  /* 鼠标移上去就停下来抬起，方便点 */
  .fcard:hover{animation:none;transform:translateY(-4px) rotate(0);border-color:var(--brand-line);
    box-shadow:0 18px 40px rgba(20,70,52,.18)}
  .fcard:hover .fcard-body b{color:var(--brand)}
}

/* 三个分区卡：白卡 + 圆角图标 + 浅绿分隔，层级更干净 */
.zone{background:#fff;border:1px solid rgba(31,107,79,.09);border-radius:20px;
  padding:26px 24px 24px;box-shadow:0 10px 28px rgba(20,70,52,.07);min-width:0}
@media (min-width:861px){
  .zones{grid-template-columns:repeat(3,minmax(0,1fr))}
}
.zicon{display:inline-flex;align-items:center;justify-content:center;width:52px;height:52px;
  border-radius:16px;background:var(--zc-soft);color:var(--zc);margin-bottom:14px}
.zicon svg{width:26px;height:26px}
.zone .zlabel{background:var(--zc-soft)}
.zone .tools li{border-radius:9px;min-width:0;flex-wrap:wrap;gap:4px 12px}
.zone .tools small{background:#f1f7f3;color:#6f8579}
.zone--study{--zc:var(--study);--zc-soft:#e9f3f7}
.zone--prep{--zc:var(--brand);--zc-soft:#e7f3ec}
.zone--fun{--zc:var(--fun);--zc-soft:#faf2e6}

/* 窄屏（小窗 / 平板 / 手机）：浮层卡片改成整行铺开，标题回到左右留白的居中版式 */
@media (max-width:1280px){
  .hero-banner{display:block;padding:48px 28px 46px;min-height:0}
  .hb-in{display:block}
  .hb-copy{max-width:none}
  .hb-copy h1{font-size:40px}
  .hb-float{position:static;inset:auto;pointer-events:auto;display:grid;gap:10px;margin-top:26px}
  .fcard{position:static;width:100%;transform:none;animation:none}
  .fcard--study,.fcard--prep,.fcard--fun{left:auto;right:auto;top:auto;bottom:auto;transform:none}
  .fcard--study:hover,.fcard--prep:hover,.fcard--fun:hover{transform:translateY(-2px)}
  .hb-glow{width:520px;height:340px}
}
@media (max-width:860px){
  /* 手机端：标题再收一号，按钮占满一行 */
  .hero-banner{padding:34px 20px 32px;border-radius:20px}
  .hb-copy h1{font-size:29px;margin-bottom:20px}
  .btn-primary{width:100%;justify-content:center;padding:14px 24px}
  .hb-note{margin-top:16px}
  .hb-shape-desk{bottom:-104px}
  /* 顶部导航收进汉堡菜单 */
  .nav{position:absolute;top:calc(100% + 8px);right:0;left:0;flex-direction:column;align-items:stretch;
    gap:2px;background:#fff;border:1px solid var(--rule);border-radius:14px;padding:8px;
    box-shadow:var(--shadow-2);display:none}
  .nav.open{display:flex}
  .nav a{padding:11px 12px;border-radius:10px}
  .nav a:hover{background:var(--brand-soft)}
  .nav-toggle{display:inline-flex}
}

/* 护眼模式下的首页横幅与导航 */
html[data-theme="dim"] .hero-banner{background:linear-gradient(180deg,#2f2720 0%,#2a231d 100%);
  border-color:rgba(255,255,255,.07)}
html[data-theme="dim"] .hb-copy h1{color:var(--ink)}
html[data-theme="dim"] .hb-note{color:var(--ink-soft)}
html[data-theme="dim"] .hb-shape-desk{background:linear-gradient(180deg,rgba(255,255,255,.06),rgba(255,255,255,0))}
html[data-theme="dim"] .hb-shape-a,html[data-theme="dim"] .hb-shape-b{opacity:.4}
html[data-theme="dim"] .btn-primary{background:var(--brand);color:#1c2a22}
html[data-theme="dim"] .fcard{background:var(--card);border-color:rgba(255,255,255,.07);
  box-shadow:0 14px 34px rgba(0,0,0,.3)}
html[data-theme="dim"] .fcard-body b{color:var(--ink)}
html[data-theme="dim"] .fcard-ico{background:rgba(143,191,164,.16);color:var(--brand)}
html[data-theme="dim"] .hb-glow{background:radial-gradient(closest-side,rgba(255,255,255,.08),rgba(255,255,255,0) 100%)}
html[data-theme="dim"] .nav,html[data-theme="dim"] .nav-toggle{background:var(--card);border-color:var(--rule)}
html[data-theme="dim"] .nav-toggle span{background:var(--ink)}
html[data-theme="dim"] .zicon{background:var(--zc-soft)}
html[data-theme="dim"] .zone .tools small{background:rgba(255,255,255,.07);color:#c8bba9}
html[data-theme="dim"] .zone{background:var(--card);border-color:rgba(255,255,255,.07)}
html[data-theme="dim"] .hb-copy h1{color:#f3ece1}

/* ============================================================
   大屏加档：1500px 以上，首页横幅、标题、浮层卡片再放大一档
   ============================================================ */
@media (min-width:1500px){
  .brand-txt b{font-size:16px}
  .nav{font-size:15px}
  /* 高宽一起长：横幅高度跟着视口宽度走，最低 540、最高 660 */
  .hero-banner{padding:86px 48px 90px;min-height:clamp(540px,30vw,660px);border-radius:34px}
  .hb-copy{max-width:min(900px,calc(100% - 700px))}
  .hb-copy h1{font-size:58px;margin-bottom:32px}
  .btn-primary{font-size:20px;padding:20px 46px;border-radius:17px}
  .hb-note{font-size:15px;margin-top:26px}
  .hb-glow{width:1200px;height:760px}
  .fcard{width:296px;padding:19px 21px;gap:14px;border-radius:19px}
  .fcard-ico{width:58px;height:58px}
  .fcard-ico svg{width:29px;height:29px}
  .fcard-body b{font-size:18.5px}
  .fcard-body small{font-size:14px;margin-top:3px}
  .fcard-ar{font-size:23px}
  .foot{font-size:13.5px}
}

/* ============================================================
   分区页（娱乐区 / 学习区 / 备课区）新排版
   左侧介绍 + 右侧精选入口 + 下方「高度对齐」的工具网格
   ============================================================ */
.nav a.is-on{color:var(--brand);position:relative}
.nav a.is-on::after{content:'';position:absolute;left:0;right:0;bottom:-8px;height:2px;
  border-radius:2px;background:var(--brand)}

.wrap.zone-page{--zone-accent:#238B6B;--zone-tint:#FFF6DC;--zone-tint-ink:#9A6B16;
  --zone-title:#17352F;--zone-muted:#64736F;--zc:var(--zone-accent)}
.wrap.zone--study.zone-page{--zone-accent:#3C7D92;--zone-tint:#EAF2F6;--zone-tint-ink:#2F6B80}
.wrap.zone--prep.zone-page{--zone-accent:#1F6B4F;--zone-tint:#E7F3EC;--zone-tint-ink:#1F6B4F}
.wrap.zone--fun.zone-page{--zone-accent:#238B6B;--zone-tint:#FFF6DC;--zone-tint-ink:#9A6B16}
.zone-page .lede,.zone-page .eyebrow{display:none}
.wrap[class*="zone--"] h1::before,.wrap.zone-page h1::before{display:none}

/* ---------- 首屏 ---------- */
.zone-hero{display:grid;grid-template-columns:minmax(0,55fr) minmax(0,45fr);gap:72px;align-items:center;
  min-height:440px;padding:56px 56px;margin-bottom:28px;border-radius:28px;
  background:linear-gradient(135deg,#f1faf6 0%,#f8fbfa 100%);
  border:1px solid rgba(31,107,79,.08);box-shadow:0 16px 40px rgba(20,70,52,.07)}
.zh-copy{min-width:0}
.zh-label{display:inline-flex;align-items:center;gap:8px;border-radius:999px;padding:7px 16px;
  font-size:13.5px;font-weight:700;background:var(--zone-tint);color:var(--zone-tint-ink)}
.zone-hero h1{margin:18px 0 14px;font-family:var(--sans);font-weight:800;font-size:48px;line-height:1.28;
  letter-spacing:-.01em;color:var(--zone-title)}
.zh-lede{margin:0 0 28px;font-size:16px;line-height:1.75;color:var(--zone-muted);max-width:34ch}
.zone-hero .btn-primary{background:var(--zone-accent)}
.zone-hero .btn-primary:hover{background:#1c7459}
.zh-picks{display:grid;gap:16px}
.pick-card{display:grid;grid-template-columns:auto 1fr auto;align-items:center;gap:16px;
  background:#fff;border:1px solid rgba(31,107,79,.09);border-radius:18px;padding:18px 20px;
  box-shadow:0 12px 30px rgba(20,70,52,.08);
  transition:transform .2s cubic-bezier(.2,.7,.3,1),box-shadow .2s,border-color .2s}
.pick-ico{display:grid;place-items:center;width:52px;height:52px;border-radius:50%;
  background:#EAF6F0;font-size:24px;line-height:1}
.pick-body{min-width:0}
.pick-body b{display:block;font-size:17px;font-weight:700;color:var(--zone-title)}
.pick-body small{display:block;margin-top:3px;font-size:13px;color:var(--zone-muted)}
.pick-tag{display:inline-block;margin-top:8px;font-size:12px;border-radius:6px;padding:2px 9px;
  background:#F1F7F4;color:#3f6f5d}
.pick-ar{color:#9fb3aa;font-size:20px;line-height:1}
@media (hover:hover){
  .pick-card:hover{transform:translateY(-3px);border-color:#bfe0d1;box-shadow:0 18px 40px rgba(20,70,52,.14)}
  .pick-card:hover .pick-body b{color:var(--zone-accent)}
}

/* ---------- 工具区 ---------- */
.games-section{background:#fff;border:1px solid rgba(31,107,79,.07);border-radius:28px;
  padding:34px 40px 40px;box-shadow:0 14px 36px rgba(20,70,52,.05)}
.games-head{display:flex;align-items:center;justify-content:space-between;gap:18px;flex-wrap:wrap;margin-bottom:26px}
.games-head h2{margin:0;font-family:var(--sans);font-weight:800;font-size:26px;color:var(--zone-title)}
.chips{display:flex;align-items:center;flex-wrap:wrap;gap:10px}
.chip{cursor:pointer;font:600 13.5px/1 var(--sans);color:#4c6b60;background:#fff;
  border:1px solid #dbe8e2;border-radius:999px;padding:9px 16px;
  transition:background .16s,color .16s,border-color .16s,box-shadow .16s}
.chip:hover{border-color:var(--zone-accent);color:var(--zone-accent)}
.chip.is-on{background:var(--zone-accent);border-color:var(--zone-accent);color:#fff;
  box-shadow:0 6px 16px rgba(35,139,107,.24)}
.chip-count{font-size:13px;color:#8a9b95;margin-left:2px}

.games{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:24px;align-items:stretch}
.gcard{position:relative;display:flex;flex-direction:column;gap:16px;min-height:196px;padding:28px;
  background:#fff;border:1px solid #e6efe9;border-radius:18px;box-shadow:0 6px 18px rgba(20,70,52,.05);
  transition:transform .2s cubic-bezier(.2,.7,.3,1),box-shadow .2s,border-color .2s}
.gcard-ico{display:grid;place-items:center;width:52px;height:52px;border-radius:16px;
  background:#EDF7F2;font-size:25px;line-height:1}
.gcard-body{display:flex;flex-direction:column;flex:1;min-width:0}
.gcard h3{margin:0 0 10px;font-size:21px;font-weight:700;color:var(--zone-title);line-height:1.4}
.gcard p{margin:0 0 16px;font-size:14.5px;line-height:1.7;color:var(--zone-muted);
  display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.gcard .tags{margin-top:auto;padding-right:52px}
.gcard-go{position:absolute;right:24px;bottom:22px;display:grid;place-items:center;width:36px;height:36px;
  border-radius:50%;background:var(--zone-accent);color:#fff;font-size:16px;line-height:1;
  transition:transform .2s}
/* 主推荐卡：占满一整行，图标更大，带明确按钮 */
.gcard--feature{grid-column:1/-1;flex-direction:row;align-items:center;gap:28px;min-height:0;
  padding:34px 36px;border-color:#cfe8dd;
  background:linear-gradient(135deg,#f4fbf7 0%,#ffffff 62%)}
.gcard-ico--lg{width:92px;height:92px;border-radius:24px;font-size:44px;background:#E3F3EB;flex:none}
.gcard--feature h3{font-size:26px}
.gcard--feature p{-webkit-line-clamp:3;font-size:15px;max-width:78ch}
.gcard-flag{align-self:flex-start;display:inline-block;margin-bottom:10px;border-radius:999px;padding:4px 12px;
  font-size:12.5px;font-weight:700;background:var(--zone-tint);color:var(--zone-tint-ink)}
.about-body,.gcard-body{min-width:0}
/* 分区页底色：顶部薄荷渐变往下过渡到接近白，工具区更干净 */
body.zone-body{background:linear-gradient(180deg,#f1faf6 0%,#f8fbfa 32%,#f7faf8 68%,#f7faf8 100%);
  background-attachment:fixed}
html[data-theme="dim"] body.zone-body{background:linear-gradient(180deg,#2b241e 0%,#241e19 46%,#241e19 100%)}
.gcard-cta{display:inline-flex;align-items:center;gap:8px;align-self:flex-start;margin-top:18px;
  border-radius:12px;padding:12px 22px;font-size:14.5px;font-weight:700;color:#fff;
  background:var(--zone-accent);transition:background .16s,transform .16s}
.gcard-cta:hover{background:#1c7459}
.gcard--feature .tags{padding-right:0}
@media (hover:hover){
  a.gcard:hover{transform:translateY(-4px);border-color:#bfe0d1;box-shadow:0 18px 40px rgba(20,70,52,.13)}
  a.gcard:hover h3{color:var(--zone-accent)}
  a.gcard:hover .gcard-go{transform:translateX(3px)}
}

/* ---------- 说明类页面（关于本站 / 学生数据说明） ---------- */
.doc-head{padding:44px 48px 42px;margin-bottom:24px;border-radius:28px;
  background:linear-gradient(135deg,#f1faf6 0%,#f8fbfa 100%);
  border:1px solid rgba(31,107,79,.08);box-shadow:0 16px 40px rgba(20,70,52,.07)}
.doc-head h1{margin:18px 0 14px;font-family:var(--sans);font-weight:800;font-size:44px;line-height:1.28;
  letter-spacing:-.01em;color:#17352F}
.doc-head .lede{display:block;margin:0;font-size:16px;line-height:1.8;color:#64736F;max-width:62ch}
.doc-head .lede b{color:#17352F}
.doc-meta{margin:16px 0 0;font-size:12.5px;color:#8a9b95}
.doc-points{display:flex;flex-wrap:wrap;gap:10px;margin-top:22px}
.doc-point{padding:8px 16px;border-radius:999px;font-size:13px;color:var(--ink-soft);
  background:#fff;border:1px solid var(--rule);box-shadow:0 4px 12px rgba(20,70,52,.04)}

.doc-panel{margin-bottom:24px;padding:36px 44px 32px;background:#fff;
  border:1px solid #e6efe9;border-radius:24px;box-shadow:0 14px 36px rgba(20,70,52,.05)}
.doc-panel > h2{margin:0 0 14px;font-family:var(--sans);font-weight:800;font-size:23px;color:#17352F}
.doc-panel > h2:not(:first-child){margin-top:30px}
.doc-panel p,.doc-panel li{font-size:14.5px;line-height:1.85;color:#64736F}
.doc-panel ul{margin:0 0 10px;padding-left:20px}
.doc-panel b{color:#17352F}
.doc-panel .key{margin:0 0 22px;padding:14px 18px;border-radius:12px;font-size:14.5px;color:#17352F;
  background:#f3faf6;border:1px solid #d8ece2}
.doc-panel a{color:var(--brand);border-bottom:1px solid var(--rule)}
.doc-panel a:hover{border-bottom-color:var(--brand)}

/* 三张分区入口卡 */
.entry-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}

/* 工具速查表 */
.doc-table{width:100%;border-collapse:collapse}
.doc-table caption{caption-side:top;text-align:left;padding:20px 0 10px;font-size:15px;font-weight:700;color:#17352F}
.doc-table caption:first-child{padding-top:0}
.doc-table th,.doc-table td{text-align:left;vertical-align:top;padding:11px 14px;
  border-bottom:1px solid #eef4f0;font-size:13.8px;line-height:1.7;color:#64736F}
.doc-table th{font-weight:700;color:#17352F;background:#f7fbf9;white-space:nowrap}
.doc-table td:first-child{color:#17352F;font-weight:600;white-space:nowrap}
.doc-table tr:last-child td{border-bottom:0}

/* 问答列表 */
.qa{margin:0;padding:0;list-style:none}
.qa li{padding:15px 0;border-bottom:1px solid #eef4f0}
.qa li:last-child{border-bottom:0}
.qa > li > b{display:block;margin-bottom:5px;font-size:15px;color:#17352F}
.qa span{display:block;font-size:14px;line-height:1.8;color:#64736F}

@media (max-width:860px){
  .doc-head{padding:28px 22px 26px;border-radius:22px}
  .doc-head h1{font-size:30px}
  .doc-head .lede{font-size:15px}
  .doc-panel{padding:24px 20px;border-radius:20px}
  .doc-panel > h2{font-size:20px}
  .entry-grid{grid-template-columns:1fr}
  .doc-table th,.doc-table td{padding:9px 8px;font-size:13px}
  .doc-table th,.doc-table td:first-child{white-space:normal}
}

html[data-theme="dim"] .doc-head{background:linear-gradient(135deg,rgba(143,191,164,.10),rgba(255,255,255,0)),var(--card);
  border-color:rgba(255,255,255,.08)}
html[data-theme="dim"] .doc-panel{background:var(--card);border-color:rgba(255,255,255,.08)}
html[data-theme="dim"] .doc-head h1,html[data-theme="dim"] .doc-panel > h2,html[data-theme="dim"] .doc-panel b,
html[data-theme="dim"] .doc-table th,html[data-theme="dim"] .doc-table td:first-child,
html[data-theme="dim"] .qa b{color:var(--ink)}
html[data-theme="dim"] .doc-head .lede,html[data-theme="dim"] .doc-panel p,html[data-theme="dim"] .doc-panel li,
html[data-theme="dim"] .doc-table td,html[data-theme="dim"] .qa span{color:var(--ink-soft)}
html[data-theme="dim"] .doc-point{background:rgba(255,255,255,.06);border-color:var(--rule)}
html[data-theme="dim"] .doc-panel .key{background:rgba(143,191,164,.10);border-color:rgba(143,191,164,.22)}
html[data-theme="dim"] .doc-table th{background:rgba(255,255,255,.05)}
html[data-theme="dim"] .doc-table td,html[data-theme="dim"] .qa li{border-color:rgba(255,255,255,.08)}

/* ---------- 折叠说明 ---------- */
.zone-hero{position:relative;overflow:hidden}
.zone-hero .zh-copy,.zone-hero .zh-picks{position:relative;z-index:1}
.zone-deco{position:absolute;pointer-events:none}
.zone-deco-1{width:620px;height:620px;right:24%;top:-14%;border-radius:50%;
  background:radial-gradient(closest-side,rgba(255,255,255,.92),rgba(255,255,255,0) 100%)}
.zone-deco-2{width:420px;height:420px;right:6%;bottom:-32%;border-radius:50%;
  background:radial-gradient(closest-side,rgba(196,232,214,.45),rgba(196,232,214,0) 100%)}
.zone-deco-3{left:52%;bottom:-46%;width:70%;height:200px;border-radius:50%;
  background:linear-gradient(180deg,rgba(255,255,255,.85),rgba(255,255,255,0))}

/* 备课区：卡片横向排（图标在左），主卡跨两行，右下角统一是「开始使用 →」 */
.gcard--h{flex-direction:row;align-items:stretch;gap:22px;padding:26px 30px;min-height:0}
.gcard--h .gcard-ico{width:64px;height:64px;border-radius:50%;font-size:30px;flex:none;align-self:flex-start}
.gcard--h h3{margin:0 0 8px;font-size:20px}
.gcard--h p{margin-bottom:14px}
.gcard--tall{grid-row:span 2;min-height:100%;padding:30px 34px}
.gcard--tall .gcard-ico{width:76px;height:76px;font-size:36px}
.gcard--tall p{-webkit-line-clamp:4}
/* 主卡高：描述在上、标签和入口贴底，空出来的部分变成留白而不是空白 */
.gcard--tall .tags{margin-top:auto;margin-bottom:40px}
.gcard-use{position:absolute;right:30px;bottom:24px;display:inline-flex;align-items:center;gap:6px;
  font-size:14px;font-weight:700;color:var(--zone-accent);transition:transform .2s}
.gcard--h .tags{padding-right:132px}
.gcard--tall .tags{padding-right:132px}
a.gcard:hover .gcard-use{transform:translateX(3px)}

/* 推荐流程条 */
.steps{display:flex;align-items:center;gap:20px;flex-wrap:wrap;margin-top:24px;padding:24px 30px;
  background:#fff;border:1px solid #e6efe9;border-radius:20px;box-shadow:0 8px 22px rgba(20,70,52,.04)}
.steps-head{display:flex;gap:14px;align-items:flex-start;min-width:230px;flex:1 1 230px}
.steps-head .steps-icon{display:grid;place-items:center;width:44px;height:44px;border-radius:50%;
  background:#EDF7F2;font-size:20px;flex:none}
.steps-head b{display:block;font-size:16px;color:var(--zone-title)}
.steps-head small{display:block;margin-top:2px;font-size:12.5px;line-height:1.6;color:var(--zone-muted)}
.step{display:flex;gap:12px;align-items:flex-start;flex:1 1 180px;min-width:180px}
.step-n{display:grid;place-items:center;width:24px;height:24px;border-radius:50%;flex:none;
  background:var(--zone-accent);color:#fff;font-size:12.5px;font-weight:700}
.step b{display:block;font-size:14px;color:var(--zone-title)}
.step small{display:block;margin-top:2px;font-size:12px;line-height:1.55;color:var(--zone-muted)}
.step-ar{color:#c2d6cd;font-size:16px;align-self:center}

@media (max-width:1080px){
  .gcard--tall{grid-row:auto}
}
@media (max-width:860px){
  .gcard--h,.gcard--tall{padding:20px;gap:16px}
  .gcard--h .gcard-ico,.gcard--tall .gcard-ico{width:52px;height:52px;font-size:26px}
  .gcard--h h3{font-size:18px}
  .gcard--h .tags,.gcard--tall .tags{padding-right:0;margin-bottom:34px}
  .gcard-use{right:20px;bottom:18px}
  .steps{padding:20px;gap:14px}
  .steps-head{min-width:100%;flex:1 1 100%}
  .step{min-width:100%;flex:1 1 100%}
  .step-ar{display:none}
}

.about-zone{margin-top:28px;padding:6px 26px;background:#fff;border:1px solid #e6efe9;border-radius:20px;
  box-shadow:0 8px 22px rgba(20,70,52,.04)}
.about-zone summary{cursor:pointer;list-style:none;padding:18px 0;font-size:16px;font-weight:700;color:var(--zone-title)}
.about-zone summary::-webkit-details-marker{display:none}
.about-zone summary::before{content:'▸';display:inline-block;margin-right:10px;color:var(--zone-accent);transition:transform .2s}
.about-zone[open] summary::before{transform:rotate(90deg)}
.about-body{padding:0 0 22px;max-width:96ch}
.about-body p{margin:0 0 10px;font-size:14.5px;line-height:1.85;color:var(--zone-muted)}
.about-body h3{margin:22px 0 6px;font-size:16px;color:var(--zone-title)}
.about-body ul{margin:0;padding-left:20px}
.about-body li{margin:6px 0;font-size:14px;line-height:1.8;color:var(--zone-muted)}
.about-body b{color:var(--zone-title)}
.about-body a{color:var(--zone-accent);border-bottom:1px solid var(--rule)}
.about-body a:hover{border-bottom-color:var(--zone-accent)}

/* 学习区：识别色用偏蓝，但主按钮保持品牌墨绿（与首页一致） */
.wrap.zone--study.zone-page .zone-hero .btn-primary,
.wrap.zone--study.zone-page .gcard-cta{background:var(--brand)}
.wrap.zone--study.zone-page .zone-hero .btn-primary:hover,
.wrap.zone--study.zone-page .gcard-cta:hover{background:var(--brand-deep)}
.wrap.zone--study.zone-page .gcard-ico,.wrap.zone--study.zone-page .pick-ico,
.wrap.zone--study.zone-page .steps-icon{background:#EAF3F7}
.wrap.zone--study.zone-page .chip.is-on{box-shadow:0 6px 16px rgba(60,125,146,.22)}

/* ---------- 窄屏 / 手机 ---------- */
@media (max-width:1080px){
  .zone-hero{grid-template-columns:1fr;gap:30px;padding:40px 32px;min-height:0}
  .zh-lede{max-width:52ch}
  .zone-hero h1{font-size:40px}
}
@media (max-width:860px){
  .zone-hero{padding:30px 22px 32px;border-radius:22px;margin-bottom:18px}
  .zone-hero h1{font-size:36px;margin:16px 0 12px}
  .zh-lede{font-size:15px;margin-bottom:22px}
  .zone-hero .btn-primary{width:100%;justify-content:center;min-height:50px}
  /* 精选卡片改成横向滑动，不挤压标题 */
  .zh-picks{display:flex;gap:14px;overflow-x:auto;scroll-snap-type:x mandatory;
    margin:0 -22px;padding:2px 22px 8px;-webkit-overflow-scrolling:touch}
  .pick-card{flex:0 0 84%;min-width:84%;scroll-snap-align:start;border-radius:16px;padding:16px}
  .games-section{padding:24px 18px 28px;border-radius:22px}
  .games-head{margin-bottom:20px}
  .games-head h2{font-size:22px}
  .games{grid-template-columns:1fr;gap:16px}
  .gcard{padding:22px;border-radius:16px;min-height:0}
  .gcard h3{font-size:19px}
  .gcard--feature{flex-direction:column;align-items:flex-start;gap:18px;padding:24px 22px}
  .gcard-ico--lg{width:64px;height:64px;border-radius:20px;font-size:32px}
  .gcard--feature h3{font-size:21px}
  .gcard--feature p{-webkit-line-clamp:4}
  .about-zone{padding:4px 18px;border-radius:16px}
}

/* ---------- 护眼模式 ---------- */
html[data-theme="dim"] .zone-hero{background:linear-gradient(135deg,rgba(143,191,164,.10),rgba(255,255,255,0)),var(--card);
  border-color:rgba(255,255,255,.08)}
html[data-theme="dim"] .games-section,html[data-theme="dim"] .about-zone{background:var(--card);border-color:rgba(255,255,255,.08)}
html[data-theme="dim"] .gcard,html[data-theme="dim"] .pick-card{background:var(--card);border-color:rgba(255,255,255,.08)}
html[data-theme="dim"] .gcard--feature{background:linear-gradient(135deg,rgba(143,191,164,.08),rgba(255,255,255,0)),var(--card)}
html[data-theme="dim"] .zone-hero h1,html[data-theme="dim"] .gcard h3,html[data-theme="dim"] .games-head h2,
html[data-theme="dim"] .about-zone summary,html[data-theme="dim"] .pick-body b,html[data-theme="dim"] .about-body b{color:var(--ink)}
html[data-theme="dim"] .zh-lede,html[data-theme="dim"] .gcard p,html[data-theme="dim"] .pick-body small,
html[data-theme="dim"] .about-body p,html[data-theme="dim"] .about-body li{color:var(--ink-soft)}
html[data-theme="dim"] .pick-ico,html[data-theme="dim"] .gcard-ico{background:rgba(143,191,164,.14)}
html[data-theme="dim"] .pick-tag{background:rgba(255,255,255,.07);color:var(--ink-soft)}
html[data-theme="dim"] .chip{background:transparent;border-color:var(--rule);color:var(--ink-soft)}
html[data-theme="dim"] .chip.is-on{background:var(--zone-accent);border-color:var(--zone-accent);color:#10231a}
html[data-theme="dim"] .zh-label{background:rgba(255,255,255,.08);color:var(--ink-soft)}
html[data-theme="dim"] .gcard-flag{background:rgba(255,255,255,.08);color:var(--ink-soft)}
html[data-theme="dim"] .steps{background:var(--card);border-color:rgba(255,255,255,.08)}
html[data-theme="dim"] .steps-head b,html[data-theme="dim"] .step b{color:var(--ink)}
html[data-theme="dim"] .steps-head small,html[data-theme="dim"] .step small{color:var(--ink-soft)}
html[data-theme="dim"] .steps-icon{background:rgba(143,191,164,.14)}
html[data-theme="dim"] .zone-deco-1{background:radial-gradient(closest-side,rgba(255,255,255,.06),rgba(255,255,255,0) 100%)}
html[data-theme="dim"] .zone-deco-2,html[data-theme="dim"] .zone-deco-3{opacity:.35}