/* ===== 五年级学习营 · 界面样式 ===== */
:root{
  --orange:#FF8C42; --orange-d:#F2752B; --orange-l:#FFF0E4;
  --teal:#3EC9C0; --teal-l:#E3F8F7;
  --purple:#8B7BF0; --purple-l:#EFEDFF;
  --pink:#FF7BA9; --pink-l:#FFECF2;
  --yellow:#FFC53D; --yellow-l:#FFF7E0;
  --green:#52C41A; --green-l:#EFF8E8;
  --ink:#2F2A26; --ink-2:#6B6158; --ink-3:#9C9289;
  --bg:#FFF8F0; --card:#FFFFFF; --line:#F0E6DA;
  --shadow:0 2px 8px rgba(120,90,60,.06), 0 8px 24px rgba(120,90,60,.06);
  --r:18px;
}
*{box-sizing:border-box; -webkit-tap-highlight-color:transparent}
html,body{margin:0;padding:0}
body{
  font-family:"PingFang SC","Microsoft YaHei","Segoe UI",system-ui,sans-serif;
  background:var(--bg); color:var(--ink); line-height:1.7;
  background-image:radial-gradient(circle at 15% 12%, #FFF1DF 0%, transparent 42%),
                   radial-gradient(circle at 88% 8%, #E9F8F7 0%, transparent 38%);
  background-attachment:fixed;
}
.app{max-width:1000px;margin:0 auto;padding:0 14px 90px}

/* ---- 顶栏 ---- */
.topbar{
  position:sticky;top:0;z-index:50;
  display:flex;align-items:center;justify-content:space-between;gap:10px;
  padding:12px 4px;margin-bottom:6px;
  background:rgba(255,248,240,.92); backdrop-filter:blur(10px);
  border-bottom:2px solid transparent;
}
.brand{font-size:20px;font-weight:800;letter-spacing:.5px;color:var(--ink);display:flex;align-items:center;gap:8px}
.brand .logo{font-size:26px}
.stats{display:flex;gap:8px;flex-wrap:wrap;justify-content:flex-end}
.chip{
  display:inline-flex;align-items:center;gap:5px;
  padding:5px 12px;border-radius:999px;font-size:13px;font-weight:700;
  background:#fff;border:1.5px solid var(--line);white-space:nowrap;
}
.chip.pts{background:var(--yellow-l);border-color:#FFE7A8;color:#9A6A00}
.chip.streak{background:var(--orange-l);border-color:#FFD6B8;color:var(--orange-d)}
.chip.date{background:#fff;color:var(--ink-3);font-weight:600}

/* ---- 底部导航 ---- */
.tabbar{
  position:fixed;left:0;right:0;bottom:0;z-index:60;
  display:flex;justify-content:space-around;align-items:stretch;
  background:rgba(255,255,255,.96);backdrop-filter:blur(12px);
  border-top:1.5px solid var(--line);
  padding:6px 4px calc(6px + env(safe-area-inset-bottom));
}
.tab{
  flex:1;display:flex;flex-direction:column;align-items:center;gap:2px;
  padding:4px 2px;border:none;background:none;cursor:pointer;
  font-size:11px;font-weight:700;color:var(--ink-3);font-family:inherit;
  border-radius:12px;transition:.15s;
}
.tab .ico{font-size:21px;line-height:1}
.tab.on{color:var(--orange-d)}
.tab.on .ico{transform:scale(1.18)}
.tab:hover{background:var(--orange-l)}

/* ---- 通用卡片 ---- */
.card{
  background:var(--card);border-radius:var(--r);padding:18px;
  box-shadow:var(--shadow);border:1.5px solid var(--line);margin-bottom:14px;
}
h2.sec{font-size:17px;margin:22px 0 12px;display:flex;align-items:center;gap:8px;font-weight:800}
h2.sec .n{font-size:12px;color:var(--ink-3);font-weight:600}
.hint{color:var(--ink-3);font-size:13px}
.row{display:flex;align-items:center;gap:10px}
.wrap{flex-wrap:wrap}
.grow{flex:1;min-width:0}

/* ---- 今日Hero ---- */
.hero{
  background:linear-gradient(135deg,#FF9A55 0%,#FF7A5C 55%,#FF9EC4 100%);
  color:#fff;border-radius:22px;padding:20px 22px;margin-bottom:16px;
  box-shadow:0 10px 30px rgba(255,122,92,.28);position:relative;overflow:hidden;
}
.hero::after{content:"🌟";position:absolute;right:-6px;top:-14px;font-size:96px;opacity:.18}
.hero h1{margin:0 0 4px;font-size:21px;font-weight:800}
.hero p{margin:0;opacity:.93;font-size:13.5px}
.hero-pts{display:flex;gap:16px;margin-top:14px}
.hero-pts div{background:rgba(255,255,255,.22);border-radius:14px;padding:8px 14px;backdrop-filter:blur(4px)}
.hero-pts b{font-size:22px;display:block;line-height:1.2}
.hero-pts span{font-size:11.5px;opacity:.92}

/* ---- 按钮 ---- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  padding:9px 18px;border-radius:12px;border:none;cursor:pointer;
  font-size:14px;font-weight:700;font-family:inherit;
  background:var(--orange);color:#fff;transition:.15s;
  box-shadow:0 3px 10px rgba(255,140,66,.32);
}
.btn:hover{background:var(--orange-d);transform:translateY(-1px)}
.btn:active{transform:translateY(0)}
.btn.ghost{background:#fff;color:var(--ink-2);border:1.5px solid var(--line);box-shadow:none}
.btn.ghost:hover{background:var(--orange-l);border-color:#FFD6B8}
.btn.teal{background:var(--teal);box-shadow:0 3px 10px rgba(62,201,192,.3)}
.btn.purple{background:var(--purple);box-shadow:0 3px 10px rgba(139,123,240,.3)}
.btn.green{background:var(--green);box-shadow:0 3px 10px rgba(82,196,26,.3)}
.btn.sm{padding:6px 12px;font-size:12.5px;border-radius:10px}
.btn.big{padding:14px 28px;font-size:16px;border-radius:16px;width:100%}
.btn[disabled]{opacity:.45;cursor:not-allowed;transform:none}
.btn.done{background:var(--green-l);color:var(--green);border:1.5px solid #BFE8AC;box-shadow:none}

/* ---- 任务卡 ---- */
.tasks{display:grid;grid-template-columns:repeat(auto-fill,minmax(215px,1fr));gap:12px}
.task{
  background:#fff;border-radius:16px;padding:14px 16px;border:1.5px solid var(--line);
  display:flex;align-items:center;gap:12px;transition:.18s;cursor:pointer;
}
.task:hover{border-color:#FFD6B8;transform:translateY(-2px);box-shadow:var(--shadow)}
.task .ti{font-size:30px;line-height:1}
.task .tt{font-size:15px;font-weight:800}
.task .ts{font-size:12px;color:var(--ink-3)}
.task.ok{background:var(--green-l);border-color:#BFE8AC}

/* ---- 单元 ---- */
.unit{margin-bottom:18px}
.unit-h{
  display:flex;align-items:center;gap:10px;padding:11px 16px;
  background:linear-gradient(90deg,var(--orange-l),#fff);
  border-radius:14px;border:1.5px solid var(--line);margin-bottom:10px;
}
.unit-h .uh-t{font-weight:800;font-size:15px}
.unit-h .uh-c{font-size:12px;color:var(--ink-3);margin-left:auto}
.lesson{
  display:flex;align-items:center;gap:12px;padding:11px 14px;margin-bottom:8px;
  background:#fff;border:1.5px solid var(--line);border-radius:14px;
  cursor:pointer;transition:.15s;
}
.lesson:hover{border-color:#FFD6B8;background:#FFFCF9;transform:translateX(3px)}
.lesson .no{
  width:42px;height:42px;flex:0 0 42px;border-radius:12px;
  display:flex;align-items:center;justify-content:center;
  font-size:14px;font-weight:800;background:var(--orange-l);color:var(--orange-d);
}
.lesson.done .no{background:var(--green-l);color:var(--green)}
.lesson .lt{flex:1;min-width:0}
.lesson .lt b{display:block;font-size:14.5px;font-weight:700}
.lesson .lt s{display:block;font-size:11.5px;color:var(--ink-3);text-decoration:none}
.lesson .lk{font-size:18px}
.teal-l .no,.teal-l{background:var(--teal-l);color:#1F9E96}
.purple-n{background:var(--purple-l);color:#6C58E0}
.pink-n{background:var(--pink-l);color:#E0507F}
.green-n{background:var(--green-l);color:var(--green)}

/* ---- 视频 ---- */
.player{border-radius:16px;overflow:hidden;background:#1B1714;margin-bottom:14px;position:relative}
.player video{width:100%;display:block;max-height:440px;background:#000}
.vph{
  padding:44px 20px;text-align:center;color:#fff;
  background:repeating-linear-gradient(45deg,#2A2521,#2A2521 12px,#302A25 12px,#302A25 24px);
}
.vph .big{font-size:44px;margin-bottom:8px}
.vph p{margin:4px 0;font-size:13.5px;opacity:.9}
.vph code{background:rgba(255,255,255,.14);padding:2px 8px;border-radius:6px;font-size:12px}

/* ---- 知识点 ---- */
.keys{display:flex;flex-direction:column;gap:8px;margin:0;padding:0;list-style:none}
.keys li{
  padding:9px 14px;background:var(--teal-l);border-radius:11px;font-size:13.5px;
  border-left:4px solid var(--teal);
}
.trap{
  padding:11px 15px;background:var(--yellow-l);border-radius:12px;font-size:13.5px;
  border-left:4px solid var(--yellow);margin-top:12px;
}
.trap b{color:#9A6A00}
.summary{font-size:14.5px;color:var(--ink-2);margin:0}

/* ---- 题目 ---- */
.q{
  background:#fff;border:1.5px solid var(--line);border-radius:16px;
  padding:16px;margin-bottom:14px;
}
.q.fin{border-color:#D8D8D8}
.q-h{display:flex;align-items:center;gap:8px;margin-bottom:10px}
.q-n{
  width:26px;height:26px;flex:0 0 26px;border-radius:8px;background:var(--orange-l);
  color:var(--orange-d);display:flex;align-items:center;justify-content:center;
  font-size:12.5px;font-weight:800;
}
.q-t{font-size:15px;font-weight:700;line-height:1.6}
.opts{display:flex;flex-direction:column;gap:8px;margin-top:12px}
.opt{
  display:flex;align-items:flex-start;gap:10px;padding:11px 14px;
  border:1.5px solid var(--line);border-radius:12px;background:#fff;
  cursor:pointer;font-size:14px;transition:.13s;text-align:left;font-family:inherit;
}
.opt:hover{border-color:#FFD6B8;background:#FFFCF9}
.opt .oL{
  width:24px;height:24px;flex:0 0 24px;border-radius:7px;background:#F6F1EB;
  display:flex;align-items:center;justify-content:center;font-size:12px;font-weight:800;color:var(--ink-3);
}
.opt.right{border-color:var(--green);background:var(--green-l)}
.opt.right .oL{background:var(--green);color:#fff}
.opt.wrong{border-color:#E85C5C;background:#FFF0F0}
.opt.wrong .oL{background:#E85C5C;color:#fff}
.opt[disabled]{cursor:default}
.fillbox{display:flex;gap:8px;margin-top:12px}
.fillbox input{
  flex:1;padding:10px 14px;border:1.5px solid var(--line);border-radius:12px;
  font-size:15px;font-family:inherit;outline:none;background:#fff;
}
.fillbox input:focus{border-color:var(--orange)}
.tip{
  margin-top:12px;padding:11px 15px;border-radius:12px;font-size:13.5px;
  background:var(--purple-l);border-left:4px solid var(--purple);color:#4A3C9E;
}
.tip.bad{background:#FFF0F0;border-color:#E85C5C;color:#B03A3A}

/* ---- 结果 ---- */
.result{text-align:center;padding:26px 18px}
.result .em{font-size:56px;line-height:1}
.result h3{margin:10px 0 4px;font-size:19px}
.result .gain{color:var(--orange-d);font-weight:800;font-size:17px;margin-top:6px}

/* ---- 打卡日历 ---- */
.cal{display:grid;grid-template-columns:repeat(7,1fr);gap:6px;margin-top:10px}
.cal div{
  aspect-ratio:1;border-radius:11px;display:flex;align-items:center;justify-content:center;
  font-size:12.5px;font-weight:700;background:#F8F3ED;color:var(--ink-3);border:1.5px solid transparent;
}
.cal .hd{background:none;color:var(--ink-3);font-size:11.5px;font-weight:700;aspect-ratio:auto;padding:4px 0}
.cal .on{background:linear-gradient(135deg,#FF9A55,#FF7A5C);color:#fff;box-shadow:0 2px 8px rgba(255,122,92,.34)}
.cal .today{border-color:var(--orange);color:var(--orange-d)}
.cal .empty{background:none}
.streak-strip{display:flex;gap:6px;margin-top:14px;flex-wrap:wrap}
.streak-strip span{
  padding:4px 11px;border-radius:999px;font-size:12px;font-weight:700;
  background:var(--orange-l);color:var(--orange-d);border:1.5px solid #FFD6B8;
}
.streak-strip span.lock{background:#F5F1EC;color:var(--ink-3);border-color:var(--line)}

/* ---- 商城 ---- */
.shop{display:grid;grid-template-columns:repeat(auto-fill,minmax(168px,1fr));gap:12px}
.rw{
  background:#fff;border:1.5px solid var(--line);border-radius:16px;padding:14px;text-align:center;
  transition:.16s;position:relative;
}
.rw:hover{transform:translateY(-3px);box-shadow:var(--shadow);border-color:#FFD6B8}
.rw .em{font-size:36px;line-height:1.1}
.rw .nm{font-size:13.5px;font-weight:700;margin:6px 0 8px;min-height:38px}
.rw .cost{
  display:inline-block;padding:4px 12px;border-radius:999px;font-size:13px;font-weight:800;
  background:var(--yellow-l);color:#9A6A00;margin-bottom:9px;
}
.rw.no{opacity:.55}

/* ---- 流水 ---- */
.log{display:flex;align-items:center;gap:10px;padding:10px 0;border-bottom:1px dashed var(--line);font-size:13.5px}
.log:last-child{border:none}
.log .li{font-size:18px}
.log .lp{margin-left:auto;font-weight:800;color:var(--green);white-space:nowrap}
.log .lp.minus{color:#C94B4B}

/* ---- 词条卡 ---- */
.words{display:grid;grid-template-columns:repeat(auto-fill,minmax(210px,1fr));gap:10px}
.wd{background:var(--purple-l);border-radius:13px;padding:11px 14px}
.wd b{display:block;font-size:14.5px;color:#4A3C9E}
.wd i{font-style:normal;font-size:11.5px;color:#7B6FB5;display:block;margin-bottom:3px}
.wd span{font-size:12.5px;color:var(--ink-2)}

/* ---- 诗词卡 ---- */
.poem{
  background:linear-gradient(160deg,#FFFDF7,#FFF6E9);border:1.5px solid #F2E3C8;
  border-radius:16px;padding:16px 18px;margin-bottom:12px;
}
.poem h4{margin:0 0 2px;font-size:16px}
.poem .au{font-size:12px;color:var(--ink-3);margin-bottom:10px}
.poem pre{
  margin:0;font-family:inherit;font-size:14.5px;line-height:2;white-space:pre-wrap;
  color:#4A3F30;letter-spacing:.4px;
}
.poem .note{
  margin-top:10px;padding:9px 13px;background:rgba(255,255,255,.7);
  border-radius:10px;font-size:12.5px;color:var(--ink-2);border-left:3px solid #E8BE7E;
}

/* ---- Toast ---- */
.toast{
  position:fixed;left:50%;top:22px;transform:translate(-50%,-140%);z-index:200;
  padding:11px 22px;border-radius:14px;font-size:14.5px;font-weight:700;
  background:var(--ink);color:#fff;box-shadow:0 8px 24px rgba(0,0,0,.24);
  transition:transform .32s cubic-bezier(.2,1.3,.5,1);pointer-events:none;max-width:88vw;text-align:center;
}
.toast.show{transform:translate(-50%,0)}
.toast.win{background:linear-gradient(135deg,#FF9A55,#FF7A5C)}
.toast.ok{background:var(--green)}
.toast.bad{background:#E85C5C}

/* ---- Modal ---- */
.modal{
  position:fixed;inset:0;z-index:150;display:none;
  background:rgba(40,30,20,.45);backdrop-filter:blur(3px);
  align-items:center;justify-content:center;padding:18px;
}
.modal.show{display:flex}
.modal .box{
  background:#fff;border-radius:20px;padding:22px;width:100%;max-width:420px;
  max-height:86vh;overflow:auto;box-shadow:0 20px 50px rgba(0,0,0,.24);
}
.modal h3{margin:0 0 14px;font-size:17px}
.fld{margin-bottom:12px}
.fld label{display:block;font-size:12.5px;font-weight:700;color:var(--ink-3);margin-bottom:5px}
.fld input,.fld select{
  width:100%;padding:10px 13px;border:1.5px solid var(--line);border-radius:11px;
  font-size:14.5px;font-family:inherit;outline:none;
}
.fld input:focus{border-color:var(--orange)}
.mbtns{display:flex;gap:9px;margin-top:16px}
.mbtns .btn{flex:1}

/* ---- 进度条 ---- */
.bar{height:9px;border-radius:999px;background:#F2EDE7;overflow:hidden;margin-top:7px}
.bar i{display:block;height:100%;border-radius:999px;background:linear-gradient(90deg,#FFB067,#FF7A5C);transition:width .5s}
.bar.teal i{background:linear-gradient(90deg,#6BDCD4,#3EC9C0)}
.bar.purple i{background:linear-gradient(90deg,#A99BF5,#8B7BF0)}
.bar.green i{background:linear-gradient(90deg,#8AD86A,#52C41A)}

.empty-tip{text-align:center;padding:34px 16px;color:var(--ink-3);font-size:14px}
.empty-tip .e{font-size:44px;margin-bottom:8px}

@media(max-width:600px){
  .app{padding:0 11px 84px}
  .brand{font-size:17px}
  .chip{padding:4px 9px;font-size:12px}
  .tasks{grid-template-columns:1fr}
  .hero h1{font-size:18px}
  .shop{grid-template-columns:repeat(2,1fr)}
  .words{grid-template-columns:1fr}
}
@media(min-width:640px){
  .tabbar{
    position:sticky;bottom:auto;top:58px;border-radius:16px;margin-bottom:14px;
    border:1.5px solid var(--line);border-top:1.5px solid var(--line);
    box-shadow:var(--shadow);max-width:1000px;margin-left:auto;margin-right:auto;
  }
}