:root{--coral:#ff7e67;--coral-dark:#e95d4d;--sky:#4dabf7;--sky-soft:#e9f5ff;--green:#51cf66;--red:#ff6b6b;--yellow:#ffd43b;--ink:#183153;--muted:#6c7b91;--paper:#fffefa;--ground:#f4f7fb;--line:#dce8f3;--shadow:0 14px 32px rgba(31,66,104,.12);--radius:16px;--font-cn:"LXGW WenKai","Microsoft YaHei",sans-serif;--font-ui:"Microsoft YaHei",system-ui,sans-serif}
*{box-sizing:border-box}html{background:var(--ground);color:var(--ink);font-family:var(--font-ui);scroll-behavior:smooth;overflow-x:hidden}body{margin:0;min-width:320px;overflow-x:hidden}button,input,select{font:inherit;color:inherit}button{min-height:44px;cursor:pointer}button:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid rgba(77,171,247,.45);outline-offset:3px}::selection{background:var(--yellow);color:var(--ink)}
.app-shell{min-height:100vh;background:radial-gradient(circle at 92% 6%,rgba(77,171,247,.12),transparent 28%),var(--ground)}
.topbar{height:78px;display:flex;align-items:center;gap:18px;padding:0 26px;background:rgba(255,254,250,.96);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:20}.brand{display:flex;align-items:center;gap:12px;min-width:250px}.brand-mark{width:44px;height:48px;display:grid;place-items:center;background:var(--coral);color:white;border-radius:7px 13px 13px 7px;box-shadow:inset 5px 0 rgba(110,38,27,.13),0 7px 14px rgba(255,126,103,.2);font-size:24px}.brand strong{font-family:var(--font-cn);font-size:19px}.brand small{display:block;color:var(--muted);margin-top:2px}.top-spacer{flex:1}.top-stat{display:flex;align-items:center;gap:7px;font-weight:800;white-space:nowrap}.icon-btn{width:44px;border:1px solid var(--line);background:var(--paper);border-radius:12px;font-size:20px}
.layout{display:grid;grid-template-columns:230px minmax(480px,1fr) 270px;gap:22px;max-width:1500px;margin:auto;padding:24px}.sidebar,.right-rail{align-self:start;position:sticky;top:102px}.side-label{font-size:13px;color:var(--muted);font-weight:800;letter-spacing:.08em;padding:0 10px 9px}.unit-list{display:grid;gap:7px}.unit-link{width:100%;border:0;background:transparent;text-align:left;border-radius:12px;padding:10px 12px;display:grid;grid-template-columns:34px 1fr auto;align-items:center;gap:9px}.unit-link:hover{background:white;transform:translateX(3px)}.unit-link.active{background:var(--ink);color:white;box-shadow:0 8px 18px rgba(24,49,83,.18)}.unit-no{width:32px;height:32px;border-radius:9px;background:var(--sky-soft);color:var(--sky);display:grid;place-items:center;font-weight:900}.active .unit-no{background:var(--coral);color:white}.unit-name{font-size:13px;font-weight:800;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}.unit-done{font-size:11px;opacity:.65}
.workspace{min-width:0}.paper{background:linear-gradient(90deg,transparent 54px,rgba(255,126,103,.26) 55px,transparent 56px),repeating-linear-gradient(0deg,transparent 0 37px,rgba(77,171,247,.10) 38px),var(--paper);border-radius:6px 18px 18px 6px;box-shadow:var(--shadow);min-height:calc(100vh - 126px);padding:34px 38px 34px 76px;position:relative;overflow:hidden}.paper:before{content:"";position:absolute;left:0;top:0;bottom:0;width:12px;background:var(--coral);box-shadow:4px 0 rgba(122,47,35,.12)}.page-head{display:flex;justify-content:space-between;align-items:start;gap:20px;margin-bottom:26px}.page-head h1{font-family:var(--font-cn);font-size:clamp(28px,3vw,46px);line-height:1.1;margin:0 0 9px;letter-spacing:-.02em}.page-head p{margin:0;color:var(--muted);font-size:15px}.page-stamp{border:2px solid var(--coral);color:var(--coral-dark);padding:8px 10px;border-radius:8px;font-weight:900;transform:rotate(2deg);white-space:nowrap}
.steps{display:grid;grid-template-columns:repeat(4,1fr);gap:8px;margin:0 0 26px}.step{border:0;background:#edf2f7;border-radius:12px;padding:10px 8px;font-size:13px;font-weight:800}.step.active{background:var(--coral);color:white}.step.done{background:#e8faeb;color:#27863a}.step:disabled{cursor:not-allowed;opacity:.55}
.hero-book{display:grid;grid-template-columns:1.1fr .9fr;gap:28px;align-items:center;padding:18px 0 30px}.hero-copy h2{font-family:var(--font-cn);font-size:clamp(28px,4vw,54px);line-height:1.12;margin:0 0 14px}.highlight{background:linear-gradient(transparent 58%,rgba(255,212,59,.75) 58%);padding:0 .08em}.hero-copy p{font-size:17px;line-height:1.8;color:var(--muted);max-width:38em}.hero-actions,.card-actions,.mode-actions{display:flex;gap:12px;flex-wrap:wrap}.btn{border:0;border-radius:12px;padding:11px 18px;font-weight:900;transition:.18s transform,.18s box-shadow}.btn:hover{transform:translateY(-2px) scale(1.015)}.btn-primary{background:var(--coral);color:white;box-shadow:0 9px 18px rgba(255,126,103,.28)}.btn-secondary{background:var(--sky-soft);color:#1674bd}.btn-ghost{background:white;border:1px solid var(--line)}.btn-success{background:var(--green);color:#10361a}.btn-danger{background:#fff0f0;color:#b13a3a}.cover{aspect-ratio:4/5;max-width:280px;justify-self:end;background:linear-gradient(145deg,#ff9a87,var(--coral));border-radius:9px 22px 22px 9px;color:white;padding:28px;box-shadow:inset 10px 0 rgba(126,42,31,.13),18px 22px 35px rgba(227,97,76,.25);transform:rotate(2deg);display:flex;flex-direction:column;justify-content:space-between}.cover h3{font-family:var(--font-cn);font-size:30px;margin:0}.cover-badge{width:68px;height:68px;border-radius:50%;display:grid;place-items:center;background:var(--yellow);color:var(--ink);font-weight:900;font-size:22px}.cover small{line-height:1.6}
.unit-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:12px}.unit-card{border:0;background:rgba(255,255,255,.82);padding:16px;border-radius:14px;text-align:left;box-shadow:0 5px 14px rgba(24,49,83,.07);position:relative;overflow:hidden}.unit-card:hover{transform:translateY(-3px);box-shadow:0 10px 20px rgba(24,49,83,.12)}.unit-card b{display:block;font-size:16px;margin:9px 0 4px}.unit-card small{color:var(--muted)}.mini-progress{height:6px;background:#e8eef4;border-radius:8px;margin-top:12px;overflow:hidden}.mini-progress i{display:block;height:100%;background:var(--green);border-radius:inherit}
.rail-card{background:var(--paper);border-radius:var(--radius);box-shadow:0 8px 22px rgba(31,66,104,.09);padding:18px;margin-bottom:14px}.rail-card h3{font-size:14px;margin:0 0 13px}.goal-row{display:flex;justify-content:space-between;margin:10px 0;font-size:13px}.bar{height:8px;background:#e9eef4;border-radius:9px;overflow:hidden}.bar i{height:100%;display:block;background:var(--sky);border-radius:inherit}.review-count{font-family:var(--font-cn);font-size:32px;font-weight:900;color:var(--coral)}.streak{display:flex;gap:10px;align-items:center}.flame{font-size:34px;animation:flame 1.2s ease-in-out infinite alternate}@keyframes flame{to{transform:translateY(-3px) rotate(3deg)}}
.study-card{perspective:1000px;min-height:360px;margin:12px auto 22px;max-width:640px}.flashcard{position:relative;min-height:360px;transform-style:preserve-3d;transition:transform .55s cubic-bezier(.2,.8,.2,1);cursor:pointer}.flashcard.flipped{transform:rotateY(180deg)}.face{position:absolute;inset:0;backface-visibility:hidden;background:white;border-radius:18px;box-shadow:0 15px 32px rgba(31,66,104,.13);display:flex;flex-direction:column;align-items:center;justify-content:center;padding:32px;text-align:center}.face.back{transform:rotateY(180deg);background:var(--sky-soft)}.word{font-size:clamp(44px,7vw,76px);font-weight:900;letter-spacing:-.035em}.phonetic{color:var(--muted);font-size:20px;margin:10px}.meaning{font-family:var(--font-cn);font-size:38px;font-weight:900}.example{max-width:32em;line-height:1.7;margin-top:20px;color:var(--muted)}.speaker{border:0;background:var(--yellow);width:50px;height:50px;border-radius:50%;font-size:22px}.progress-row{display:flex;justify-content:space-between;color:var(--muted);font-size:13px;margin-bottom:8px}.progress-line{height:9px;background:#e8eef5;border-radius:12px;overflow:hidden;margin-bottom:18px}.progress-line i{display:block;height:100%;background:linear-gradient(90deg,var(--sky),var(--green));transition:width .35s}
.tabs{display:flex;gap:8px;overflow:auto;margin-bottom:18px;padding-bottom:4px}.tab{border:1px solid var(--line);background:white;border-radius:10px;padding:8px 13px;white-space:nowrap}.tab.active{background:var(--ink);color:white;border-color:var(--ink)}.sentence-list{display:grid;gap:12px}.sentence{background:rgba(255,255,255,.88);border-radius:14px;padding:16px 18px;box-shadow:0 4px 12px rgba(31,66,104,.06);border:1px solid transparent}.sentence:hover{border-color:#acd7fa}.sentence-en{font-size:18px;font-weight:750;line-height:1.65}.sentence-cn{color:var(--muted);margin-top:7px;line-height:1.6}.sentence button{float:right;border:0;background:transparent;font-size:18px}.mode-picker{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.mode-card{border:1px solid var(--line);background:white;border-radius:14px;padding:18px;text-align:left}.mode-card:hover{border-color:var(--sky);transform:translateY(-2px)}.mode-card b{font-size:17px}.mode-card p{color:var(--muted);font-size:13px;line-height:1.5}.quiz-box{background:white;border-radius:16px;padding:26px;box-shadow:0 10px 22px rgba(31,66,104,.09)}.question{font-size:21px;font-weight:900;line-height:1.55}.option{display:block;width:100%;text-align:left;border:1px solid var(--line);background:white;border-radius:12px;padding:13px 16px;margin:9px 0}.option:hover{border-color:var(--sky);background:var(--sky-soft)}.option.correct{background:#e8faeb;border-color:var(--green)}.option.wrong{background:#fff0f0;border-color:var(--red)}.blank{display:inline-block;min-width:78px;border-bottom:3px solid var(--sky);color:var(--coral);text-align:center}.text-input{width:100%;min-height:48px;border:1px solid var(--line);border-radius:12px;padding:10px 14px;background:white}.empty{text-align:center;padding:50px 20px;color:var(--muted)}.empty span{display:block;font-size:52px;margin-bottom:14px}
.stats-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-bottom:18px}.stat-card{background:white;padding:18px;border-radius:14px}.stat-card strong{font-size:28px;display:block}.stat-card small{color:var(--muted)}canvas{width:100%;height:260px;background:white;border-radius:16px}.toast{position:fixed;left:50%;bottom:28px;transform:translate(-50%,120px);background:var(--ink);color:white;padding:12px 18px;border-radius:12px;z-index:100;transition:.3s}.toast.show{transform:translate(-50%,0)}.confetti i{position:fixed;top:-20px;width:9px;height:14px;z-index:99;animation:fall 1.7s linear forwards}@keyframes fall{to{transform:translateY(105vh) rotate(720deg)}}.shake{animation:shake .3s}@keyframes shake{25%{transform:translateX(-7px)}75%{transform:translateX(7px)}}.pop{animation:pop .35s}@keyframes pop{50%{transform:scale(1.05)}}.bottom-nav{display:none}
body.dark{--paper:#18263a;--ground:#0e1928;--ink:#edf5ff;--muted:#9db0c7;--line:#2b4059;--sky-soft:#183a56}.dark .topbar,.dark .unit-card,.dark .rail-card,.dark .face,.dark .sentence,.dark .tab,.dark .mode-card,.dark .quiz-box,.dark .option,.dark .text-input,.dark .stat-card,.dark canvas{background:#18263a}.dark .paper{background:linear-gradient(90deg,transparent 54px,rgba(255,126,103,.3) 55px,transparent 56px),repeating-linear-gradient(0deg,transparent 0 37px,rgba(77,171,247,.10) 38px),#142237}.dark .step{background:#26394f}
@media(max-width:1100px){.layout{grid-template-columns:190px 1fr}.right-rail{display:none}.paper{padding-right:28px}.unit-grid{grid-template-columns:repeat(2,1fr)}}
@media(max-width:760px){.topbar{height:66px;padding:0 14px}.brand{min-width:0}.brand small,.top-stat:nth-of-type(2){display:none}.layout{display:block;padding:0}.sidebar{display:none}.paper{min-height:calc(100vh - 66px);border-radius:0;padding:24px 17px 96px 27px}.paper:before{width:7px}.page-head{margin-bottom:18px}.page-stamp{display:none}.steps{grid-template-columns:repeat(4,100px);overflow-x:auto;padding-bottom:7px}.hero-book{display:block}.hero-actions{display:grid;grid-template-columns:1fr}.hero-actions .btn{width:100%;min-width:0}.cover{margin:22px auto 0;width:min(230px,calc(100% - 18px));max-width:none;aspect-ratio:4/4.6;padding:22px;overflow:hidden}.cover h3{font-size:24px;overflow-wrap:anywhere}.unit-grid{grid-template-columns:1fr 1fr}.study-card,.flashcard{min-height:330px}.face{min-height:330px;padding:24px 18px}.mode-picker,.stats-grid{grid-template-columns:1fr}.bottom-nav{position:fixed;display:grid;grid-template-columns:repeat(5,minmax(0,1fr));left:0;right:0;bottom:0;background:var(--paper);border-top:1px solid var(--line);z-index:30;padding:6px 4px calc(6px + env(safe-area-inset-bottom))}.bottom-nav button{border:0;background:transparent;font-size:11px;padding:2px;min-width:0}.bottom-nav span{font-size:20px;display:block}.card-actions .btn{flex:1}.word{font-size:50px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.01ms!important;transition-duration:.01ms!important}}
@media(max-width:760px){.topbar{gap:8px}.topbar .top-stat:last-of-type,.topbar .icon-btn{display:none}.brand{flex:1;max-width:230px}.brand strong{font-size:18px}.brand-mark{flex:0 0 42px}.paper,.paper *{max-width:100%}.page-head h1,.hero-copy h2,.page-head p,.hero-copy p{overflow-wrap:anywhere}.hero-book{overflow:hidden}.cover{transform:rotate(1deg)}.bottom-nav button[aria-current="page"]{color:var(--coral-dark);font-weight:900;background:rgba(255,126,103,.08);border-radius:10px}}
@media(max-width:760px){.topbar .sleep-shortcut{display:grid}.learning-principle{display:grid}.context-first,.oral-output,.sleep-mode,.sleep-finish{padding:22px 16px}.context-sentence{font-size:18px}}
@media(max-width:760px){.brand strong{font-size:0;white-space:nowrap}.brand strong:after{content:'英语 5A';font-size:18px}.brand{max-width:none}.coin-chip{white-space:nowrap}}
@media(max-width:900px) and (min-width:761px){.hero-book{display:block}.home-egg{min-height:320px;margin-top:20px}.cover.mini{margin:auto}.home-egg>.word-egg{left:22%;bottom:10px}}
#chart{height:520px}
.season-node button{margin-top:12px}.season-node em{display:block;margin-top:12px;color:#27863a}.season-report{margin-top:22px;padding:22px;background:white;border-radius:20px}

/* v3 单词蛋游戏化系统 */
.coin-chip{border:0;background:#fff4c4;border-radius:999px;padding:9px 14px;font-weight:900;color:#725700}.btn-game{background:#6846d8;color:white;box-shadow:0 9px 18px rgba(104,70,216,.23)}.home-egg{position:relative;display:flex;align-items:end;justify-content:center;min-height:330px}.home-egg>.word-egg{position:absolute;z-index:2;left:0;bottom:15px}.cover.mini{max-width:245px;margin-left:80px}
.game-paper{background:linear-gradient(160deg,rgba(255,255,255,.88),rgba(235,246,255,.92)),var(--paper)}.game-head{display:flex;align-items:center;gap:26px;margin-bottom:26px}.game-head h1,.game-head h2{font-family:var(--font-cn);margin:0 0 7px;font-size:36px}.coin-line{display:inline-block;background:#fff4c4;color:#725700;border-radius:12px;padding:8px 12px;font-weight:900}
.word-egg{width:76px;height:76px;border-radius:50% 50% 45% 45%;background:radial-gradient(circle at 32% 23%,#fff 0 5%,#8bd2ff 6% 17%,#4dabf7 50%,#217cbe 100%);box-shadow:inset -8px -10px 16px rgba(9,73,118,.2),0 12px 20px rgba(34,101,150,.18);position:relative;display:inline-block;animation:eggIdle 2s ease-in-out infinite}.egg-large{width:126px;height:126px}.egg-shine{position:absolute;left:18%;top:13%;width:20%;height:12%;border-radius:50%;background:rgba(255,255,255,.65);transform:rotate(-24deg)}.egg-eye{position:absolute;top:38%;width:9%;height:14%;border-radius:50%;background:#132640}.egg-eye.left{left:34%}.egg-eye.right{right:34%}.egg-skin{position:absolute;left:50%;top:-14%;transform:translateX(-50%);font-size:36px;filter:drop-shadow(0 3px 2px rgba(0,0,0,.15))}.egg-large .egg-skin{font-size:54px}.egg-leg{position:absolute;bottom:-8%;width:27%;height:17%;border-radius:50%;background:#277eb8}.egg-leg.l{left:12%;transform:rotate(-12deg)}.egg-leg.r{right:12%;transform:rotate(12deg)}.egg-boss{background:radial-gradient(circle at 30% 20%,#fff 0 4%,#ff9a87 5% 22%,#ff6b6b 56%,#bc3544 100%);animation:bossFloat 1.2s ease-in-out infinite}.egg-boss:after{content:'😎';position:absolute;font-size:58px;left:50%;top:26%;transform:translateX(-50%)}@keyframes eggIdle{50%{transform:translateY(-5px) rotate(2deg)}}@keyframes bossFloat{50%{transform:translateY(-7px) scaleX(1.04)}}
.game-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.game-entry{min-height:150px;border:0;border-radius:24px;padding:22px;text-align:left;color:white;box-shadow:0 12px 24px rgba(31,66,104,.14);transition:transform .18s}.game-entry:hover{transform:translateY(-4px) scale(1.01)}.game-entry span{font-size:34px;float:right}.game-entry b{display:block;font-size:21px;margin-bottom:8px}.game-entry small{display:block;max-width:25em;line-height:1.6;color:inherit}.game-entry.coral{background:linear-gradient(145deg,#ff9a87,#ff6f5b)}.game-entry.sky{background:linear-gradient(145deg,#65bcff,#2f91df)}.game-entry.yellow{background:linear-gradient(145deg,#ffd95c,#eaaa16);color:#4b3900}.game-entry.green{background:linear-gradient(145deg,#69dc7a,#32ae50)}.game-entry.purple{background:linear-gradient(145deg,#987de9,#6846d8)}.game-entry.navy{background:linear-gradient(145deg,#345780,#183153)}
.arena{min-height:690px}.arena-top,.pk-score{display:flex;justify-content:space-between;align-items:center;gap:12px}.race-track{height:190px;margin:22px 0;position:relative;background:linear-gradient(#b8e3ff 0 58%,#72ce70 58% 73%,#d7b07b 73%);border-radius:24px;overflow:hidden}.track-line{position:absolute;left:0;right:0;bottom:31px;border-top:5px dashed rgba(255,255,255,.8)}.runner,.rival{position:absolute;bottom:30px;transition:left .4s cubic-bezier(.2,.8,.2,1)}.rival{bottom:33px;transform:scale(.72)}.finish{position:absolute;right:5%;bottom:48px;font-size:48px}.game-question{max-width:640px;margin:auto;text-align:center}.game-word{font-size:clamp(40px,7vw,72px);font-weight:900;letter-spacing:-.035em}.answer-grid{display:grid;grid-template-columns:1fr 1fr;gap:12px;margin-top:20px}.egg-answer{border:0;border-radius:999px;background:white;box-shadow:0 8px 18px rgba(31,66,104,.11);padding:14px 18px;font-weight:900}.egg-answer:hover{background:var(--sky-soft);transform:translateY(-2px)}.egg-answer.correct{background:#dff7e4;color:#217c34;animation:pop .3s}.egg-answer.wrong{background:#ffe2e2;color:#a42a2a;animation:shake .3s}.boss-zone{text-align:center;margin:10px auto 20px}.boss-hp{height:18px;max-width:560px;margin:12px auto 6px;background:#27374c;border:4px solid white;border-radius:16px;overflow:hidden;box-shadow:0 5px 12px rgba(0,0,0,.18)}.boss-hp i{display:block;height:100%;background:linear-gradient(90deg,#ff6b6b,#ffae67)}
.game-canvas{display:block;width:100%;height:auto;aspect-ratio:16/7.2;border-radius:24px;margin:18px 0;background:#bfe7ff;box-shadow:0 14px 30px rgba(24,49,83,.15);touch-action:none}.touch-controls{display:flex;justify-content:center;gap:14px;margin-top:14px}.touch-controls button{min-width:130px;border:0;border-radius:999px;padding:12px;background:var(--ink);color:white;font-weight:900}.game-gate{padding:16px 18px;margin-bottom:18px;border-radius:16px;background:#fff3c4;color:#654e00;text-align:center}.game-entry:disabled{filter:grayscale(.65);opacity:.55;cursor:not-allowed}.wrong-summary{display:grid;gap:6px;max-width:520px;margin:18px auto;padding:16px;background:#fff4f4;border-radius:16px;text-align:left}.result-stars{font-size:32px}
.parent-lock{width:100%;border:1px solid var(--line);background:transparent;border-radius:12px;color:var(--muted)}.parent-login{max-width:420px;margin:70px auto;text-align:center}.parent-login>span{font-size:58px}.parent-login .text-input{margin:14px 0}.parent-panel{background:white;border-radius:20px;padding:24px}.parent-panel label{display:grid;gap:8px;margin:18px 0;font-weight:800}.parent-panel select{min-height:48px;border:1px solid var(--line);border-radius:12px;padding:8px 12px;background:white}.usage-table{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}.usage-table span{padding:14px;background:var(--sky-soft);border-radius:12px;text-align:center}.source-note{font-size:12px;color:var(--muted);margin-top:16px}
.learning-principle{display:flex;justify-content:space-between;gap:14px;padding:14px 18px;margin-bottom:16px;background:#e9f7ee;border-radius:14px;color:#246b36}.context-first,.oral-output,.sleep-mode,.sleep-finish{text-align:center;max-width:700px;margin:25px auto;padding:32px;background:white;border-radius:22px;box-shadow:0 12px 25px rgba(31,66,104,.1)}.dual-icon{font-size:64px;margin:8px}.context-sentence{font-size:22px;font-weight:800;line-height:1.6}.syllables{color:#2879b8;font-weight:900;letter-spacing:.08em}.speaker.big{width:70px;height:70px;font-size:30px}.feedback-slot,[data-feedback]{line-height:1.7;color:var(--muted)}.sleep-mode{background:#132238;color:#f4f7fb;min-height:520px;display:flex;flex-direction:column;align-items:center;justify-content:center}.sleep-mode .phonetic{color:#b8c8da}.sleep-mode.morning{background:#fff8dd;color:var(--ink)}.sleep-finish>span,.huge-emoji{font-size:72px}.sleep-finish{min-height:480px;display:flex;flex-direction:column;justify-content:center;align-items:center}
.parent-guide{margin-top:28px;padding:20px;background:#fff8dd;border-radius:16px}.parent-guide li{margin:10px 0;line-height:1.6}.check-row{display:flex!important;grid-template-columns:auto 1fr!important;align-items:center}.check-row input{width:22px;height:22px}
.study-rest{position:fixed;inset:0;z-index:200;background:#eaf6ff;display:grid;place-items:center;text-align:center;padding:24px}.study-rest>div{max-width:520px}.study-rest span{font-size:84px}.study-rest p{font-size:18px;line-height:1.8}
.stage-complete{text-align:center;margin:26px 0 8px}.step:disabled{cursor:not-allowed;opacity:.45}.step.done:after{content:' ✓'}
.game-result,.pk-intro{text-align:center;padding:35px 10px}.game-result .result-score{font-size:76px;font-weight:950;color:var(--coral)}.pk-eggs{display:flex;align-items:center;justify-content:center;gap:34px}.pk-eggs>b{font-size:38px}.pk-record{display:flex;justify-content:center;gap:22px;margin-top:26px;background:white;border-radius:16px;padding:16px}.pk-arena{text-align:center}.pk-options{display:grid;grid-template-columns:1fr 1fr;gap:18px;margin:30px 0}.pk-options button{min-height:92px;border:0;border-radius:24px;background:var(--sky-soft);font-size:20px;font-weight:900}.pk-options button:last-child{background:#fff0ee}.pk-score{font-size:22px}
.pk-touch-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px;margin:24px 0}.pk-touch-grid section{display:grid;gap:10px;padding:18px;background:#eaf6ff;border-radius:22px}.pk-touch-grid section:last-child{background:#fff0ee}.pk-touch-grid button{min-height:72px;border:0;border-radius:16px;background:white;font-weight:900;font-size:17px;touch-action:manipulation}
.shop-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}.shop-box{background:white;border-radius:24px;padding:24px;text-align:center}.shop-box.rare{background:linear-gradient(145deg,#f1ebff,#fff)}.blind-box{width:105px;height:105px;margin:auto;background:linear-gradient(145deg,#ff9a87,#ff6f5b);border-radius:28px;display:grid;place-items:center;font-size:54px;font-weight:900;color:white;box-shadow:0 12px 20px rgba(255,111,91,.22)}.skin-wall{display:grid;grid-template-columns:repeat(4,1fr);gap:12px}.skin-tile{border:0;border-radius:18px;background:white;padding:16px 8px;display:grid;place-items:center;gap:8px}.skin-tile.locked{filter:grayscale(.75);opacity:.6}.skin-tile b,.skin-tile small{display:block}.season-hero{display:grid;grid-template-columns:150px 1fr;align-items:center;gap:24px}.season-track{height:18px;background:#dde6ef;border-radius:20px;overflow:hidden}.season-track i{display:block;height:100%;background:linear-gradient(90deg,#c47e47,#ffd43b,#4dabf7)}.season-chain{display:grid;grid-template-columns:repeat(4,1fr);gap:12px;margin-top:32px}.season-node{padding:22px 14px;background:white;border-radius:18px;text-align:center}.season-node.done{background:#e7f9eb}.season-node small{display:block;margin-top:7px;color:var(--muted)}
@media(max-width:760px){.coin-chip{padding:7px 9px}.topbar .top-stat{display:none}.home-egg{min-height:300px}.home-egg>.word-egg{left:6px}.cover.mini{margin-left:48px}.game-head{align-items:flex-start;gap:14px}.game-head h1,.game-head h2{font-size:27px}.game-head .egg-large{width:88px;height:88px;flex:0 0 88px}.game-grid,.answer-grid,.shop-grid{grid-template-columns:1fr}.game-entry{min-height:118px}.arena{min-height:620px}.race-track{height:150px}.skin-wall{grid-template-columns:1fr 1fr}.season-hero{grid-template-columns:90px 1fr}.season-hero .egg-large{width:84px;height:84px}.season-chain{grid-template-columns:1fr 1fr}.steps.five{grid-template-columns:repeat(5,100px)}.pk-record{flex-direction:column}.pk-touch-grid{gap:8px}.pk-touch-grid section{padding:10px}.pk-touch-grid button{min-height:82px;font-size:14px}.game-word{font-size:46px}.usage-table{grid-template-columns:1fr 1fr}}

/* V3 第二版：错题本与举一反三 */
.record-actions{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:20px}.mistake-rail button{width:100%;border:0;background:var(--sky-soft);border-radius:12px;padding:12px;text-align:left}.mistake-rail strong{display:block;font-size:30px;color:var(--coral-dark)}.mistake-rail span{font-size:12px;color:var(--muted)}
.mistake-summary{display:grid;grid-template-columns:repeat(4,1fr);gap:10px;margin-bottom:20px}.mistake-summary>div{background:white;padding:16px;border-radius:14px}.mistake-summary strong{display:block;font-size:30px;font-variant-numeric:tabular-nums}.mistake-summary span{font-size:12px;color:var(--muted)}
.mistake-tools{display:grid;grid-template-columns:minmax(180px,1fr) repeat(3,minmax(105px,auto));gap:10px;margin-bottom:18px}.mistake-tools select,.practice-intro select{min-height:48px;border:1px solid var(--line);border-radius:12px;background:white;padding:0 12px}.mistake-list{display:grid;gap:10px}.mistake-row{display:grid;grid-template-columns:minmax(250px,1.2fr) minmax(220px,1fr) auto;gap:18px;align-items:center;background:white;padding:17px;border-radius:15px;box-shadow:0 6px 16px rgba(31,66,104,.07)}.mistake-row.mastered{background:#f2fbf4}.mistake-main{display:flex;gap:12px;align-items:flex-start;min-width:0}.mistake-main h2{font-size:18px;margin:0 0 5px;overflow-wrap:anywhere}.mistake-main p{margin:0 0 5px;color:var(--muted);overflow-wrap:anywhere}.mistake-main small{color:var(--muted);line-height:1.5}.mastery-cell{display:grid;gap:7px;min-width:0}.mastery-cell>div:first-child{display:flex;justify-content:space-between;gap:8px}.mastery-cell span,.mastery-cell small{font-size:11px;color:var(--muted);overflow-wrap:anywhere}.mastery-bar{height:8px;background:#e6edf3;border-radius:8px;overflow:hidden}.mastery-bar i{display:block;height:100%;background:linear-gradient(90deg,var(--coral),var(--yellow),var(--green));border-radius:inherit}.mistake-empty{background:white;border-radius:16px}
.practice-intro{display:flex;justify-content:space-between;align-items:end;gap:22px;margin-bottom:22px}.practice-intro h2{margin:0 0 6px}.practice-intro p{max-width:62ch;color:var(--muted);line-height:1.7}.practice-intro label{display:grid;gap:6px;font-weight:800;min-width:190px}.practice-paths{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.practice-paths button{border:0;background:white;border-radius:16px;min-height:170px;padding:22px;text-align:left;box-shadow:0 9px 22px rgba(31,66,104,.09);transition:.18s transform,.18s box-shadow}.practice-paths button:hover{transform:translateY(-3px);box-shadow:0 15px 26px rgba(31,66,104,.13)}.practice-paths strong{display:block;font-size:40px;color:var(--coral);font-variant-numeric:tabular-nums}.practice-paths b{display:block;font-size:20px;margin:9px 0}.practice-paths span{color:var(--muted)}.variant-key{margin-top:28px;padding:20px 0;border-top:1px solid var(--line)}.variant-key h2{margin:0 0 8px}.variant-key p{color:var(--muted);line-height:1.8}
.deep-question{max-width:760px;margin:26px auto;background:white;border-radius:18px;padding:30px;box-shadow:0 12px 26px rgba(31,66,104,.1);text-align:center}.deep-question h2{font-size:clamp(21px,3vw,30px);line-height:1.5;overflow-wrap:anywhere}.question-type{display:inline-block;color:#176cae;background:var(--sky-soft);padding:7px 12px;border-radius:9px;font-size:12px;font-weight:900}.deep-question .text-input{margin:18px 0 12px}.practice-feedback{min-height:52px;margin-top:18px;color:var(--muted);line-height:1.65}.practice-result{text-align:center;max-width:620px;margin:60px auto}.practice-result>span{font-size:72px}.practice-result .card-actions{justify-content:center}.practice-result .result-score{font-size:64px;font-weight:950;color:var(--coral);font-variant-numeric:tabular-nums}
.dark .mistake-summary>div,.dark .mistake-row,.dark .practice-paths button,.dark .deep-question,.dark .mistake-empty,.dark .mistake-tools select,.dark .practice-intro select{background:#18263a}.dark .mistake-row.mastered{background:#183724}
@media(max-width:900px){.mistake-row{grid-template-columns:1fr}.mistake-row>.btn{justify-self:start}.mistake-tools{grid-template-columns:1fr 1fr}.practice-paths{grid-template-columns:1fr}.practice-paths button{min-height:130px}.practice-intro{align-items:stretch;flex-direction:column}.practice-intro label{min-width:0}}
@media(max-width:760px){.page-head:has(>button[data-route="practice"]){display:grid}.page-head:has(>button[data-route="practice"])>.btn{width:100%}.mistake-summary{grid-template-columns:1fr 1fr}.mistake-tools{grid-template-columns:1fr}.mistake-row{padding:15px;gap:14px}.mastery-cell>div:first-child{display:grid}.record-actions{display:grid}.record-actions .btn{width:100%}.practice-paths button{min-height:118px}.practice-paths strong{font-size:32px}.deep-question{padding:22px 15px;margin:14px auto}.deep-question .answer-grid{grid-template-columns:1fr}.practice-result{margin:28px auto}}