/* ============ 天天向上英语 · 抹茶绿主题 ============ */
:root{
  --matcha:#7C9A6B; --matcha-deep:#5F7D52; --matcha-dark:#3D4F35;
  --matcha-light:#EAF0E3; --matcha-lighter:#F4F7EE;
  --cream:#FAF7F0; --card:#FFFFFF;
  --amber:#D9A441; --amber-light:#F7EBD3;
  --red:#C4664F; --red-light:#F6E3DD;
  --ink:#2F3A2A; --ink-soft:#6B7A61; --line:#E5E3D8;
  --blue:#5B7E9E; --blue-light:#E2EAF1;
  --shadow:0 6px 24px rgba(93,110,80,.10);
  --shadow-lg:0 14px 44px rgba(93,110,80,.16);
  --radius:18px;
  --serif:"Noto Serif SC","Source Han Serif SC",Georgia,"Songti SC",serif;
  --sans:"PingFang SC","Microsoft YaHei","Segoe UI",system-ui,sans-serif;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--sans);background:var(--cream);color:var(--ink);min-height:100vh;display:flex;flex-direction:column;line-height:1.7}
a{color:var(--matcha-deep);text-decoration:none}
a:hover{color:var(--matcha-dark)}
button{font-family:inherit;cursor:pointer}

/* ---------- 背景漂浮叶片 ---------- */
.bg-decor{position:fixed;inset:0;pointer-events:none;z-index:0;overflow:hidden}
.leaf{position:absolute;font-size:26px;opacity:.14;animation:leafFloat 14s ease-in-out infinite}
.leaf.l1{top:12%;left:4%;animation-delay:0s}
.leaf.l2{top:64%;left:8%;font-size:34px;animation-delay:-4s}
.leaf.l3{top:22%;right:5%;animation-delay:-7s}
.leaf.l4{bottom:14%;right:9%;font-size:30px;animation-delay:-2s}
.leaf.l5{top:44%;left:48%;font-size:22px;animation-delay:-9s}
@keyframes leafFloat{0%,100%{transform:translateY(0) rotate(-8deg)}50%{transform:translateY(-26px) rotate(10deg)}}

/* ---------- 顶栏 ---------- */
.topbar{position:sticky;top:0;z-index:50;background:rgba(250,247,240,.86);backdrop-filter:blur(12px);border-bottom:1px solid var(--line)}
.topbar-inner{max-width:1120px;margin:0 auto;padding:10px 20px;display:flex;align-items:center;gap:18px}
.brand{display:flex;align-items:baseline;gap:8px}
.brand-leaf{font-size:22px;transform:translateY(3px)}
.brand-name{font-family:var(--serif);font-size:20px;font-weight:700;color:var(--matcha-dark)}
.brand-name i{font-style:normal;color:var(--matcha)}
.brand-sub{font-size:11px;color:var(--ink-soft);letter-spacing:.4px}
.nav{display:flex;gap:2px;flex-wrap:wrap;margin-left:auto}
.nav a{padding:7px 13px;border-radius:999px;font-size:14.5px;color:var(--ink-soft);transition:all .25s}
.nav a:hover{background:var(--matcha-light);color:var(--matcha-dark)}
.nav a.active{background:var(--matcha);color:#fff;box-shadow:0 4px 14px rgba(124,154,107,.4)}
.streak-chip{background:linear-gradient(135deg,#fff8ea,var(--amber-light));border:1px solid #ecd9ae;color:#9a6d1b;padding:5px 13px;border-radius:999px;font-size:13.5px;white-space:nowrap;animation:flamePulse 2.4s ease-in-out infinite}
@keyframes flamePulse{0%,100%{transform:scale(1)}50%{transform:scale(1.06)}}

/* ---------- 主区 ---------- */
main{flex:1;width:100%;max-width:1120px;margin:0 auto;padding:30px 20px 60px;position:relative;z-index:1}
.view-fade{animation:viewIn .45s cubic-bezier(.2,.7,.3,1)}
@keyframes viewIn{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:none}}
.footer{border-top:1px solid var(--line);text-align:center;padding:18px;color:var(--ink-soft);font-size:13px;position:relative;z-index:1}

/* ---------- 通用组件 ---------- */
.btn{display:inline-flex;align-items:center;gap:7px;border:none;border-radius:14px;padding:11px 22px;font-size:15px;font-weight:600;transition:all .22s}
.btn-primary{background:var(--matcha);color:#fff}
.btn-primary:hover{background:var(--matcha-deep);transform:translateY(-2px);box-shadow:0 8px 22px rgba(95,125,82,.35)}
.btn-ghost{background:transparent;border:1.6px solid var(--matcha);color:var(--matcha-deep)}
.btn-ghost:hover{background:var(--matcha-light)}
.btn-amber{background:var(--amber);color:#fff}
.btn-amber:hover{background:#c48f2f;transform:translateY(-2px)}
.btn:active{transform:scale(.96)}
.btn-sm{padding:7px 14px;font-size:13.5px;border-radius:11px}
.card{background:var(--card);border-radius:var(--radius);box-shadow:var(--shadow);padding:26px;border:1px solid rgba(229,227,216,.6)}
.card-hover{transition:all .3s cubic-bezier(.2,.7,.3,1)}
.card-hover:hover{transform:translateY(-5px);box-shadow:var(--shadow-lg)}
.grid{display:grid;gap:20px}
.g2{grid-template-columns:repeat(2,1fr)}.g3{grid-template-columns:repeat(3,1fr)}.g4{grid-template-columns:repeat(4,1fr)}
@media(max-width:900px){.g3,.g4{grid-template-columns:repeat(2,1fr)}}
@media(max-width:620px){.g2,.g3,.g4{grid-template-columns:1fr}.topbar-inner{flex-wrap:wrap}.nav{margin-left:0}}
.page-title{font-family:var(--serif);font-size:30px;color:var(--matcha-dark);margin-bottom:6px;display:flex;align-items:center;gap:10px}
.page-sub{color:var(--ink-soft);margin-bottom:26px;font-size:15px}
.tag{display:inline-block;padding:2.5px 11px;border-radius:999px;font-size:12px;font-weight:600;line-height:1.6}
.tag-green{background:var(--matcha-light);color:var(--matcha-dark)}
.tag-amber{background:var(--amber-light);color:#9a6d1b}
.tag-red{background:var(--red-light);color:var(--red)}
.tag-blue{background:var(--blue-light);color:var(--blue)}
.divider{height:1px;background:var(--line);margin:26px 0}
.fade-up{animation:fadeUp .5s both}
@keyframes fadeUp{from{opacity:0;transform:translateY(18px)}to{opacity:1;transform:none}}

/* ---------- 首页 ---------- */
.hero{position:relative;background:linear-gradient(135deg,var(--matcha) 0%,var(--matcha-deep) 60%,var(--matcha-dark) 100%);border-radius:26px;padding:44px 40px;color:#fff;overflow:hidden;box-shadow:var(--shadow-lg)}
.hero::after{content:"🍃 🌿 ✨";position:absolute;right:28px;bottom:14px;font-size:30px;opacity:.5;letter-spacing:14px;animation:leafFloat 9s ease-in-out infinite}
.hero h1{font-family:var(--serif);font-size:34px;margin-bottom:10px}
.hero p{opacity:.92;max-width:640px;font-size:15.5px}
.hero .btn{margin-top:22px;background:#fff;color:var(--matcha-dark)}
.hero .btn:hover{transform:translateY(-2px);box-shadow:0 10px 26px rgba(0,0,0,.22)}
.hero-stats{display:flex;gap:34px;margin-top:26px;flex-wrap:wrap}
.hero-stat b{font-size:26px;font-family:var(--serif);display:block}
.hero-stat span{font-size:12.5px;opacity:.85}
.stat-grid{margin-top:22px}
.stat-card{text-align:center;padding:22px 16px;position:relative;overflow:hidden}
.stat-card .ico{font-size:30px;margin-bottom:6px;display:inline-block;animation:bob 3s ease-in-out infinite}
@keyframes bob{0%,100%{transform:translateY(0)}50%{transform:translateY(-5px)}}
.stat-card b{font-size:24px;font-family:var(--serif);color:var(--matcha-dark);display:block}
.stat-card span{font-size:13px;color:var(--ink-soft)}
.quick-nav{margin-top:22px}
.quick-card{display:flex;flex-direction:column;align-items:center;justify-content:center;gap:8px;padding:26px 14px;text-align:center;cursor:pointer}
.quick-card .ico{font-size:34px;transition:transform .3s}
.quick-card:hover .ico{transform:scale(1.2) rotate(-6deg)}
.quick-card b{font-size:16px;color:var(--ink)}
.quick-card span{font-size:12.5px;color:var(--ink-soft)}
.today-card ul{list-style:none}
.today-card li{display:flex;align-items:center;gap:12px;padding:13px 6px;border-bottom:1px dashed var(--line);font-size:15px}
.today-card li:last-child{border-bottom:none}
.today-card li .st{margin-left:auto;font-size:13px}
.done-yes{color:var(--matcha-deep);font-weight:600}
.done-no{color:var(--ink-soft)}

/* 进度环 */
.ring-wrap{position:relative;width:120px;height:120px}
.ring-wrap svg{transform:rotate(-90deg)}
.ring-bg{stroke:var(--matcha-light)}
.ring-val{stroke:var(--matcha);stroke-linecap:round;transition:stroke-dashoffset 1s cubic-bezier(.2,.7,.3,1)}
.ring-num{position:absolute;inset:0;display:flex;flex-direction:column;align-items:center;justify-content:center}
.ring-num b{font-size:24px;font-family:var(--serif);color:var(--matcha-dark)}
.ring-num span{font-size:11px;color:var(--ink-soft)}

/* 打卡日历 */
.cal-grid{display:grid;grid-template-columns:repeat(14,1fr);gap:5px;margin-top:10px}
.cal-cell{aspect-ratio:1;border-radius:7px;background:var(--matcha-lighter);border:1px solid var(--line);display:flex;align-items:center;justify-content:center;font-size:10.5px;color:var(--ink-soft)}
.cal-cell.hit{background:var(--matcha);color:#fff;border-color:var(--matcha-deep);animation:pop .4s}
.cal-cell.today{outline:2.5px solid var(--amber)}
@keyframes pop{0%{transform:scale(.4)}70%{transform:scale(1.15)}100%{transform:scale(1)}}

/* ---------- 方法页 ---------- */
.engine-flow{display:flex;align-items:center;justify-content:center;gap:14px;flex-wrap:wrap;padding:28px 20px}
.engine{width:190px;text-align:center;padding:20px 14px;border-radius:16px;background:var(--matcha-lighter);border:2px dashed var(--matcha);transition:all .3s}
.engine:hover{transform:translateY(-4px);background:#fff;box-shadow:var(--shadow)}
.engine .ico{font-size:34px}
.engine b{display:block;margin:8px 0 4px;font-size:16px;color:var(--matcha-dark)}
.engine span{font-size:12.5px;color:var(--ink-soft)}
.engine-arrow{font-size:24px;color:var(--matcha);animation:arrowMove 1.6s ease-in-out infinite}
@keyframes arrowMove{0%,100%{transform:translateX(0);opacity:.5}50%{transform:translateX(7px);opacity:1}}
.timeline{position:relative;margin-top:36px;padding-left:34px}
.timeline::before{content:"";position:absolute;left:11px;top:8px;bottom:8px;width:3px;border-radius:3px;background:linear-gradient(var(--matcha),var(--matcha-light))}
.stage{position:relative;margin-bottom:30px;animation:fadeUp .55s both}
.stage-dot{position:absolute;left:-34px;top:20px;width:24px;height:24px;border-radius:50%;background:var(--matcha);border:5px solid var(--cream);box-shadow:0 0 0 3px var(--matcha);z-index:2}
.stage-dot.done{background:var(--amber);box-shadow:0 0 0 3px var(--amber)}
.stage-head{display:flex;align-items:center;gap:12px;flex-wrap:wrap}
.stage-head h3{font-family:var(--serif);font-size:21px;color:var(--matcha-dark)}
.stage-tag{margin-left:auto}
.routine{margin:16px 0;border-radius:14px;overflow:hidden;border:1px solid var(--line)}
.routine-row{display:flex;align-items:center;gap:10px;padding:11px 16px;background:#fff;font-size:14.5px;border-bottom:1px solid var(--line)}
.routine-row:last-child{border-bottom:none}
.routine-row .t{font-weight:700;color:var(--matcha-deep);min-width:64px;font-variant-numeric:tabular-nums}
.checklist{list-style:none;margin-top:12px}
.checklist li{display:flex;gap:11px;align-items:flex-start;padding:9px 4px;font-size:14.5px;border-bottom:1px dashed var(--line)}
.checklist li:last-child{border:none}
.chk{flex:none;width:21px;height:21px;border-radius:7px;border:2px solid var(--matcha);display:flex;align-items:center;justify-content:center;color:#fff;font-size:13px;transition:all .2s;margin-top:3px;cursor:pointer;user-select:none}
.chk.on{background:var(--matcha);animation:pop .35s}
.tool-chip{display:inline-flex;align-items:center;gap:6px;background:var(--matcha-lighter);border:1px solid var(--line);padding:5px 12px;border-radius:999px;font-size:13px;margin:4px 6px 0 0;color:var(--ink)}
.tool-chip a{font-weight:600}
.stage-progress{height:8px;border-radius:99px;background:var(--matcha-lighter);overflow:hidden;margin-top:14px}
.stage-progress i{display:block;height:100%;background:linear-gradient(90deg,var(--matcha),var(--amber));border-radius:99px;transition:width .8s cubic-bezier(.2,.7,.3,1)}
.tip-card{padding:24px}
.tip-card h4{font-family:var(--serif);font-size:17px;color:var(--matcha-dark);margin-bottom:8px}
.tip-card p{font-size:14px;color:var(--ink);margin-bottom:8px}
.tip-card .extra{font-size:13px;color:var(--ink-soft)}

/* ---------- 背单词 ---------- */
.pack-grid{margin-top:8px}
.pack-card{cursor:pointer;padding:22px;position:relative;overflow:hidden}
.pack-card::before{content:attr(data-ico);position:absolute;right:-6px;bottom:-12px;font-size:64px;opacity:.09;transform:rotate(-12deg)}
.pack-card h4{font-size:16.5px;color:var(--matcha-dark);margin-bottom:4px}
.pack-card p{font-size:13px;color:var(--ink-soft)}
.pack-card .cnt{position:absolute;top:18px;right:16px;font-size:12px;background:var(--matcha-light);color:var(--matcha-dark);padding:2px 10px;border-radius:99px}
.pack-card .mine{position:absolute;top:18px;right:16px;font-size:12px;background:var(--amber-light);color:#9a6d1b;padding:2px 10px;border-radius:99px}
.srs-stats{display:flex;gap:22px;flex-wrap:wrap;font-size:14px;color:var(--ink-soft)}
.srs-stats b{color:var(--matcha-dark);font-size:18px;font-family:var(--serif)}
.flash-wrap{max-width:560px;margin:30px auto;perspective:1200px}
.flashcard{position:relative;width:100%;min-height:300px;transform-style:preserve-3d;transition:transform .55s cubic-bezier(.3,.8,.3,1);cursor:pointer}
.flashcard.flip{transform:rotateY(180deg)}
.face{position:absolute;inset:0;backface-visibility:hidden;border-radius:22px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;padding:30px;box-shadow:var(--shadow-lg)}
.face.front{background:linear-gradient(160deg,#fff,var(--matcha-lighter));border:1.5px solid var(--line)}
.face.back{background:linear-gradient(160deg,var(--matcha-dark),var(--matcha-deep));color:#fff;transform:rotateY(180deg)}
.face .word{font-family:Georgia,var(--serif);font-size:44px;color:var(--matcha-dark)}
.face .phon{font-size:18px;color:var(--ink-soft)}
.face .trans{font-size:20px;text-align:center;line-height:1.8}
.face .hint{position:absolute;bottom:16px;font-size:12.5px;opacity:.6}
.face .speak-btn{position:absolute;top:16px;right:16px;background:rgba(255,255,255,.75);border:none;width:38px;height:38px;border-radius:50%;font-size:17px;transition:transform .2s}
.face .speak-btn:hover{transform:scale(1.15)}
.grade-row{display:flex;gap:14px;justify-content:center;margin-top:26px;flex-wrap:wrap}
.grade-btn{border:none;border-radius:16px;padding:13px 26px;font-size:15px;font-weight:700;color:#fff;transition:all .2s;min-width:110px}
.grade-btn:active{transform:scale(.94)}
.grade-btn[data-g="again"]{background:var(--red)}
.grade-btn[data-g="hard"]{background:var(--amber)}
.grade-btn[data-g="good"]{background:var(--matcha)}
.grade-btn:hover{filter:brightness(1.08);transform:translateY(-2px)}
.grade-btn small{display:block;font-weight:400;font-size:11px;opacity:.85}
.session-bar{display:flex;align-items:center;gap:14px;font-size:14px;color:var(--ink-soft);flex-wrap:wrap}
.progress-track{flex:1;height:10px;border-radius:99px;background:var(--matcha-lighter);overflow:hidden;min-width:120px}
.progress-track i{display:block;height:100%;background:linear-gradient(90deg,var(--matcha),var(--amber));transition:width .4s}
.word-btn{background:var(--matcha-light);border:none;padding:6px 13px;border-radius:10px;font-size:13.5px;color:var(--matcha-dark);font-weight:600}
.word-btn:hover{background:var(--matcha);color:#fff}
.vocab-table{width:100%;border-collapse:collapse;font-size:14px}
.vocab-table th,.vocab-table td{padding:9px 10px;text-align:left;border-bottom:1px solid var(--line)}
.vocab-table th{color:var(--ink-soft);font-weight:600;font-size:12.5px}
.empty-tip{text-align:center;padding:50px 20px;color:var(--ink-soft)}
.empty-tip .ico{font-size:46px;display:block;margin-bottom:10px;animation:bob 3s infinite}

/* ---------- 阅读器 ---------- */
.shelf-card{cursor:pointer;position:relative}
.shelf-card .lv{position:absolute;top:16px;right:16px}
.shelf-card h4{font-family:var(--serif);font-size:17px;color:var(--matcha-dark);margin:8px 0 4px}
.shelf-card .en-title{font-size:13px;color:var(--ink-soft);font-style:italic;margin-bottom:10px}
.shelf-card p{font-size:12.5px;color:var(--ink-soft)}
.shelf-card .pg-bar{height:6px;border-radius:99px;background:var(--matcha-lighter);margin-top:12px;overflow:hidden}
.shelf-card .pg-bar i{display:block;height:100%;background:var(--matcha)}
.reader-top{display:flex;align-items:center;gap:12px;flex-wrap:wrap;margin-bottom:18px}
.reader-top .chapters{max-width:320px}
.reader-page{background:#FFFDF6;border:1px solid var(--line);border-radius:20px;padding:36px 44px;box-shadow:var(--shadow);max-width:820px;margin:0 auto;font-family:Georgia,var(--serif);font-size:17.5px;line-height:2;color:var(--ink)}
.reader-page p{margin-bottom:1.2em;cursor:pointer}
.reader-page p:hover{background:var(--matcha-lighter)}
.reader-page w{cursor:pointer;border-bottom:1.5px dotted var(--matcha);transition:background .15s;border-radius:3px}
.reader-page w:hover{background:var(--amber-light)}
.reader-nav{display:flex;justify-content:space-between;align-items:center;margin:22px auto 0;max-width:820px}
.reader-ctl{display:flex;gap:10px;align-items:center;flex-wrap:wrap;justify-content:center;margin-top:14px;font-size:13px;color:var(--ink-soft)}
.reader-ctl label{display:flex;align-items:center;gap:5px;cursor:pointer}

/* 释义弹窗 */
.dict-pop{position:absolute;z-index:80;background:#fff;border-radius:14px;box-shadow:var(--shadow-lg);border:1px solid var(--line);padding:16px 18px;max-width:320px;min-width:220px;animation:popIn .22s cubic-bezier(.2,.9,.3,1.2)}
@keyframes popIn{from{opacity:0;transform:scale(.85) translateY(8px)}to{opacity:1;transform:none}}
.dict-pop .dw{font-family:Georgia,serif;font-size:22px;color:var(--matcha-dark)}
.dict-pop .dp{font-size:14px;color:var(--ink-soft);margin:2px 0 6px}
.dict-pop .dt{font-size:14.5px;margin-bottom:10px}
.dict-pop .close-x{position:absolute;top:8px;right:10px;border:none;background:none;font-size:15px;color:var(--ink-soft)}

/* ---------- AI陪练 ---------- */
.coach-card{display:flex;flex-direction:column}
.coach-card .c-head{display:flex;align-items:center;gap:10px;margin-bottom:10px}
.coach-card .c-head .ico{font-size:26px}
.coach-card h4{font-size:16.5px;color:var(--matcha-dark)}
.coach-card p{font-size:13.5px;color:var(--ink-soft);flex:1}
.coach-card .prompt-body{background:var(--matcha-lighter);border-radius:12px;padding:14px 16px;font-size:13px;white-space:pre-wrap;font-family:inherit;color:var(--ink);max-height:180px;overflow:auto;border:1px dashed var(--matcha)}
.coach-card .btn{margin-top:12px;align-self:flex-start}
.steps{counter-reset:s}
.steps li{list-style:none;position:relative;padding:0 0 18px 44px}
.steps li::before{counter-increment:s;content:counter(s);position:absolute;left:0;top:0;width:30px;height:30px;border-radius:50%;background:var(--matcha);color:#fff;display:flex;align-items:center;justify-content:center;font-weight:700;font-size:14px}
.steps li::after{content:"";position:absolute;left:14px;top:32px;bottom:2px;width:2px;background:var(--matcha-light)}
.steps li:last-child::after{display:none}
.steps b{color:var(--matcha-dark)}

/* ---------- 资源库 ---------- */
.filter-bar{display:flex;gap:10px;flex-wrap:wrap;margin-bottom:22px;align-items:center}
.filter-chip{border:1.5px solid var(--line);background:#fff;border-radius:999px;padding:6px 15px;font-size:13.5px;color:var(--ink-soft);transition:all .2s}
.filter-chip:hover{border-color:var(--matcha);color:var(--matcha-deep)}
.filter-chip.on{background:var(--matcha);border-color:var(--matcha);color:#fff}
.search-input{border:1.5px solid var(--line);border-radius:999px;padding:8px 18px;font-size:14px;background:#fff;min-width:200px;outline:none;transition:border .2s}
.search-input:focus{border-color:var(--matcha)}
.res-card{display:flex;flex-direction:column}
.res-card .r-top{display:flex;align-items:flex-start;gap:10px}
.res-card h4{font-size:16px;color:var(--matcha-dark);flex:1}
.res-card p{font-size:13.5px;color:var(--ink-soft);flex:1;margin:8px 0 12px}
.res-card .r-foot{display:flex;gap:6px;flex-wrap:wrap;align-items:center}
.res-card .go{margin-left:auto}
.os ico{font-size:13px}
.mini-tag{font-size:11px;padding:2px 8px;border-radius:6px;background:var(--matcha-lighter);color:var(--ink-soft);border:1px solid var(--line)}

/* ---------- Toast / Modal / 彩带 ---------- */
#toastBox{position:fixed;top:70px;right:20px;z-index:200;display:flex;flex-direction:column;gap:10px}
.toast{background:var(--matcha-dark);color:#fff;padding:12px 20px;border-radius:13px;font-size:14px;box-shadow:var(--shadow-lg);animation:toastIn .3s cubic-bezier(.2,.9,.3,1.2);display:flex;gap:8px;align-items:center;max-width:320px}
.toast.warn{background:var(--red)}
@keyframes toastIn{from{opacity:0;transform:translateX(40px)}to{opacity:1;transform:none}}
.toast.out{animation:toastOut .3s forwards}
@keyframes toastOut{to{opacity:0;transform:translateX(40px)}}
#modalRoot .mask{position:fixed;inset:0;background:rgba(46,58,40,.4);z-index:150;display:flex;align-items:center;justify-content:center;padding:20px;animation:maskIn .25s}
@keyframes maskIn{from{opacity:0}to{opacity:1}}
#modalRoot .box{background:#fff;border-radius:20px;max-width:560px;width:100%;max-height:82vh;overflow:auto;padding:30px;position:relative;animation:popIn .3s cubic-bezier(.2,.9,.3,1.15)}
#confettiCanvas{position:fixed;inset:0;pointer-events:none;z-index:300}

/* ---------- 关于页 ---------- */
.about-block{margin-bottom:18px}
.about-block h4{font-family:var(--serif);color:var(--matcha-dark);margin-bottom:8px;font-size:17px}
.about-block p,.about-block li{font-size:14px;color:var(--ink);margin-bottom:6px}
.about-block code{background:var(--matcha-lighter);padding:2px 8px;border-radius:6px;font-size:13px}
.num-roll{display:inline-block;font-variant-numeric:tabular-nums}

@media (max-width:620px){
  .hero{padding:32px 24px}
  .hero h1{font-size:26px}
  .reader-page{padding:24px 20px;font-size:16px}
  .flashcard .word{font-size:34px}
}

/* ============ 移动端：底部标签栏 & 触控优化 ============ */
.tabbar{
  position:fixed;left:0;right:0;bottom:0;z-index:60;
  display:none;
  background:rgba(250,247,240,.94);backdrop-filter:blur(14px);
  border-top:1px solid var(--line);
  padding:6px 4px calc(6px + env(safe-area-inset-bottom,0px));
  justify-content:space-around;
}
.tabbar a{
  display:flex;flex-direction:column;align-items:center;gap:2px;
  font-size:11px;color:var(--ink-soft);padding:5px 12px;border-radius:13px;
  min-width:60px;min-height:48px;justify-content:center;transition:all .2s;
  -webkit-tap-highlight-color:transparent;
}
.tabbar a .t-ico{font-size:21px;transition:transform .25s}
.tabbar a.active{color:var(--matcha-dark);background:var(--matcha-light)}
.tabbar a.active .t-ico{transform:scale(1.15) translateY(-1px)}

@media (max-width:768px){
  .nav{display:none}
  .tabbar{display:flex}
  main{padding:18px 14px calc(88px + env(safe-area-inset-bottom,0px))}
  .footer{padding-bottom:calc(84px + env(safe-area-inset-bottom,0px))}
  .brand-sub{display:none}
  .streak-chip{padding:4px 10px;font-size:12.5px}
  .page-title{font-size:24px}
  .hero{padding:30px 22px;border-radius:20px}
  .hero h1{font-size:24px}
  .hero-stat b{font-size:21px}
  .btn{min-height:44px;padding:11px 18px}
  .grade-btn{min-width:0;flex:1;padding:13px 8px}
  .flash-wrap{margin:18px auto}
  .flashcard{min-height:250px}
  .face .word{font-size:34px}
  .routine-row{padding:10px 12px;font-size:13.5px}
  .reader-top{gap:8px}
  .reader-top .chapters{max-width:100%;flex:1}
  .reader-page{padding:20px 16px;font-size:16.5px;line-height:1.95;border-radius:16px}
  .reader-page w{padding:1px 0}
  .dict-pop{max-width:min(300px,calc(100vw - 32px))}
  .filter-bar{gap:7px}
  .filter-chip{padding:7px 13px;font-size:13px}
  .search-input{min-width:0;flex:1}
  .coach-card .prompt-body{max-height:150px;font-size:12.5px}
  #toastBox{top:auto;bottom:calc(96px + env(safe-area-inset-bottom,0px));right:12px;left:12px;align-items:center}
  .steps li{padding-bottom:14px}
  .swipe-hint{display:block}
}
.swipe-hint{display:none}

/* 触屏：去掉 hover 抖动，加大热区 */
@media (hover:none){
  .card-hover:hover{transform:none;box-shadow:var(--shadow)}
  .quick-card:hover .ico{transform:none}
}

/* ============ 暗色模式（跟随系统） ============ */
@media (prefers-color-scheme:dark){
  :root{
    --cream:#20261C;--card:#2A3226;--line:#3B4534;
    --ink:#E4E8D8;--ink-soft:#9DA98C;
    --matcha-light:#36422D;--matcha-lighter:#2E3827;
    --amber-light:#4A3D22;--red-light:#4A2E27;--blue-light:#2C3A47;
    --shadow:0 6px 24px rgba(0,0,0,.35);--shadow-lg:0 14px 44px rgba(0,0,0,.45);
  }
  body{background:var(--cream)}
  .topbar{background:rgba(32,38,28,.88)}
  .tabbar{background:rgba(32,38,28,.94)}
  .face.front{background:linear-gradient(160deg,#313B2B,#28311F);border-color:#3B4534}
  .face .word{color:#C9DDB6}
  .reader-page{background:#262E21;border-color:#3B4534;color:#E0E4D2}
  .search-input,.routine-row{background:var(--card)}
  .cal-cell{background:var(--matcha-lighter)}
  .toast{background:#E4E8D8;color:#20261C}
  .toast.warn{background:#E8B4A5;color:#4A1F14}
  .hero{background:linear-gradient(135deg,#5F7D52 0%,#4C6440 60%,#37452D 100%)}
  .dict-pop{background:#2F382A}
  a{color:#A9C793}
  .nav a:hover{background:var(--matcha-light)}
}