:root{color-scheme:dark;--bg:#101927;--panel:#182334;--panel2:#1c293c;--line:#2b394c;--text:#f0ede5;--muted:#9caabb;--gold:#edc37d;--gold2:#d7a752;--green:#8ed4b3;--red:#f2a5a1;--radius:22px;--serif:"Songti SC","Noto Serif CJK SC","STSong","SimSun",serif;--sans:-apple-system,BlinkMacSystemFont,"PingFang SC","Microsoft YaHei",sans-serif}
*{box-sizing:border-box}body{margin:0;background:var(--bg);color:var(--text);font:15px/1.65 var(--sans);min-width:320px}body:before{content:"";position:fixed;inset:0;background:radial-gradient(ellipse at 80% 0%,#283d593e,transparent 48%);pointer-events:none;z-index:-1}button,input,select{font:inherit}button{cursor:pointer}a{color:var(--gold);text-underline-offset:4px}button,a,input,select,summary{outline-offset:5px}button:focus-visible,a:focus-visible,summary:focus-visible{outline:2px solid var(--gold)}button{color:inherit}button:disabled{cursor:default}button:disabled:not(.option){opacity:.45}svg.icon{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.65;stroke-linecap:round;stroke-linejoin:round;vertical-align:middle;flex-shrink:0}.hidden{display:none!important}.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap}.shell{max-width:1200px;margin:auto;padding:0 38px}.masthead{height:99px;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line);gap:24px}.brand{border:0;background:none;display:flex;align-items:center;gap:13px;padding:0;text-align:left}.seal{height:43px;width:43px;display:grid;place-items:center;background:var(--gold);color:#192330;font-family:var(--serif);font-weight:700;font-size:25px;border-radius:12px}.brand-name{display:block;font:700 21px/1.4 var(--serif);letter-spacing:2px}.brand-sub{display:block;font-size:10px;letter-spacing:2px;color:var(--muted);margin-top:2px}.nav{display:flex;align-items:center;gap:25px}.nav-item{background:none;border:0;padding:12px 0;color:var(--muted);position:relative;font-size:14px;white-space:nowrap}.nav-item.active{color:var(--gold)}.nav-item.active:after{content:"";position:absolute;bottom:0;left:50%;transform:translateX(-50%);height:3px;width:20px;border-radius:4px;background:var(--gold)}.nav-count{font-size:10px;background:#2a394b;color:var(--gold);padding:2px 5px;border-radius:5px;margin-left:4px}.icon-btn{width:40px;height:40px;border:1px solid var(--line);border-radius:50%;background:transparent;display:inline-grid;place-items:center;color:var(--muted);flex-shrink:0}.icon-btn:hover{color:var(--gold);border-color:#816f50}.page{padding-top:42px;padding-bottom:44px;animation:appear .25s ease}.eyebrow{font-size:11px;color:var(--gold);letter-spacing:3px;display:flex;align-items:center;gap:10px}.eyebrow:before{content:"";width:22px;height:1px;background:var(--gold)}.hero{display:grid;grid-template-columns:minmax(0,1fr) 292px;align-items:center;gap:48px}.hero h1{font:500 clamp(32px,3.5vw,44px)/1.5 var(--serif);letter-spacing:3px;margin:13px 0 12px}.hero h1 span{color:var(--gold)}.hero-desc{color:var(--muted);font-size:14px;margin:0}.hero-quote{display:flex;align-items:center;justify-content:center;gap:28px;padding:18px 0;border-left:1px solid var(--line)}.vertical-quote{writing-mode:vertical-rl;font:20px/1.9 var(--serif);letter-spacing:6px;color:#c9c8c0}.quote-meta{font-size:11px;color:var(--muted);writing-mode:vertical-rl;letter-spacing:3px}.quote-mark{font:62px/1 var(--serif);color:var(--gold);align-self:flex-start;opacity:.55}.overview{margin:30px 0 34px;border:1px solid var(--line);border-radius:17px;display:grid;grid-template-columns:1.45fr repeat(3,1fr);background:#162132b3;padding:22px 10px}.stat{padding:0 25px;border-right:1px solid var(--line);display:flex;flex-direction:column;justify-content:center}.stat:last-child{border:0}.stat-top{display:flex;align-items:center;gap:9px;font-size:12px;color:var(--muted)}.stat-num{font:500 30px/1.35 var(--sans);margin-top:5px;letter-spacing:1px}.stat-num em{font:400 13px var(--sans);color:var(--muted);font-style:normal;letter-spacing:0;margin-left:6px}.stat:first-child .stat-num{color:var(--gold)}.thin-progress{height:4px;border-radius:5px;background:#2a3749;margin-top:10px;overflow:hidden}.thin-progress span{display:block;height:100%;background:var(--gold);border-radius:5px;transition:width .3s}.section-top{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-bottom:17px}.section-title{display:flex;align-items:baseline;gap:13px}.section-title h2{font:600 21px/1.5 var(--serif);letter-spacing:1px;margin:0}.section-title span{font-size:12px;color:var(--muted)}.text-btn{border:0;background:none;color:var(--muted);padding:7px 0;display:inline-flex;align-items:center;gap:7px;font-size:12px}.text-btn:hover{color:var(--gold)}.lesson-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:15px}.lesson-card{border:1px solid var(--line);border-radius:19px;background:linear-gradient(140deg,#1c293b,#162131);padding:22px 21px 18px;text-align:left;position:relative;overflow:hidden;transition:transform .2s,border-color .2s}.lesson-card:hover{transform:translateY(-4px);border-color:#867353}.lesson-upper{display:flex;align-items:center;justify-content:space-between}.lesson-order{font:12px var(--sans);color:var(--muted);letter-spacing:2px}.lesson-icon{height:32px;width:32px;border:1px solid #a8895140;color:var(--gold);border-radius:9px;display:grid;place-items:center}.lesson-card h3{font:600 25px/1.4 var(--serif);letter-spacing:3px;margin:20px 0 4px}.lesson-author{font-size:11px;color:var(--muted)}.lesson-count{font-size:12px;color:#c6ced8;margin-top:23px;display:flex;align-items:center;gap:7px}.lesson-count i{height:3px;width:3px;background:var(--gold);border-radius:50%;display:inline-block}.lesson-progress-info{margin-top:19px;display:flex;justify-content:space-between;align-items:center;font-size:11px;color:var(--muted)}.lesson-progress-info b{color:#c2cbda;font-weight:400}.lesson-card .thin-progress{height:3px;margin-top:8px}.lesson-watermark{position:absolute;font:100px/1 var(--serif);right:-8px;top:65px;color:#e2c78d05;pointer-events:none}.practice-strip{display:flex;gap:16px;margin-top:21px}.mix-btn{border:0;background:var(--gold);color:#242a30;display:flex;align-items:center;justify-content:space-between;gap:18px;flex:1;padding:17px 24px;border-radius:14px;text-align:left;transition:background .2s}.mix-btn:hover,.primary:hover{background:#f5d397}.mix-btn strong{display:block;font-weight:600;font-size:16px;letter-spacing:1px}.mix-btn small{display:block;color:#4d4b43;font-size:11px;margin-top:2px}.mix-btn>.icon{width:24px;height:24px}.daily-btn{width:272px;border:1px solid var(--line);border-radius:14px;display:flex;align-items:center;gap:14px;background:var(--panel);padding:16px 21px;text-align:left}.daily-btn:hover{border-color:#867353}.daily-btn>.icon{color:var(--gold);width:25px;height:25px}.daily-btn strong{font-size:14px;display:block}.daily-btn small{font-size:11px;color:var(--muted)}.daily-btn .arrow{margin-left:auto;color:var(--muted)}.method-tip{display:flex;align-items:center;justify-content:center;gap:8px;font-size:11px;color:var(--muted);margin:24px 0 0}.method-tip .icon{width:15px;height:15px}.footer{border-top:1px solid var(--line);padding:20px 0 24px;display:flex;justify-content:space-between;gap:16px;font-size:11px;color:#94a1b2}.footer button{font-size:11px}.footer .text-btn{padding:0}.resume{border:1px solid #9c805042;background:#b8945010;border-radius:13px;padding:12px 18px;display:flex;gap:15px;justify-content:space-between;align-items:center;margin-bottom:22px;font-size:12px;color:#c4cbd4}.resume button{background:none;border:0;color:var(--gold);white-space:nowrap}.page-heading{margin-bottom:26px;display:flex;align-items:center;justify-content:space-between;gap:15px}.page-heading h1{font:500 31px/1.4 var(--serif);margin:0 0 7px;letter-spacing:2px}.page-heading p{color:var(--muted);font-size:13px;margin:0}.primary,.secondary{border-radius:11px;padding:12px 20px;border:1px solid transparent;font-size:13px;display:inline-flex;align-items:center;justify-content:center;gap:9px}.primary{color:#232a30;background:var(--gold);font-weight:600}.secondary{background:var(--panel);border-color:var(--line);color:#c9d1dc}.secondary:hover{border-color:#7a6d54;color:var(--gold)}.filter-row{display:flex;gap:10px;margin-bottom:23px;flex-wrap:wrap}.search{flex:1;min-width:200px;position:relative}.search .icon{position:absolute;left:15px;top:14px;color:var(--muted);width:18px}.search input{padding:12px 16px 12px 43px;width:100%;background:var(--panel);color:var(--text);border:1px solid var(--line);border-radius:11px}.search input::placeholder{color:var(--muted)}select{background:var(--panel);color:#cbd2dc;border:1px solid var(--line);border-radius:11px;padding:10px 32px 10px 13px;max-width:100%}.result-caption{font-size:12px;color:var(--muted);margin-bottom:14px}.word-list{display:grid;gap:10px}.word-item{background:var(--panel);border:1px solid var(--line);border-radius:14px;overflow:hidden}.word-item summary{padding:16px 19px;cursor:pointer;list-style:none;display:flex;gap:16px;align-items:center}.word-item summary::-webkit-details-marker{display:none}.word-char{width:72px;flex-shrink:0;color:var(--gold);font:600 23px/1.3 var(--serif)}.word-info{flex:1;min-width:0}.word-source{color:var(--muted);font-size:10px}.word-sentence{color:#d7dce4;font:16px/1.7 var(--serif);margin-top:3px}.tag{font-size:10px;display:inline-flex;align-items:center;gap:5px;padding:3px 8px;border-radius:5px;background:#2c3a4e;color:#c7d1df;white-space:nowrap}.tag.good{color:var(--green);background:#8ed4b310}.tag.warm{color:var(--gold);background:#edc37d10}.tag.bad{color:var(--red);background:#f2a5a110}.word-item summary>.icon{color:var(--muted);width:16px}.word-item[open] summary>.icon{transform:rotate(180deg)}.word-detail{border-top:1px solid var(--line);margin:0 19px;padding:17px 0;color:#c9d1dc;font-size:13px}.word-detail strong{color:var(--gold);font-size:16px}.word-detail p{margin:10px 0 0}.word-detail p span{color:var(--muted);margin-right:10px}.word-actions{display:flex;align-items:center;gap:12px;margin-top:15px}.word-actions button{padding:7px 11px;font-size:11px}.favorite.active{color:var(--gold);border-color:#967e4d}.favorite.active .icon{fill:#edc37d24}.empty-state{text-align:center;padding:75px 20px;border:1px dashed var(--line);border-radius:18px;color:var(--muted)}.empty-state>.icon{height:36px;width:36px;color:var(--gold);margin-bottom:12px}.empty-state h2{font:500 24px var(--serif);color:var(--text);margin:5px 0 12px}.empty-state p{font-size:13px;margin-bottom:23px}.quiz-page{max-width:900px;margin:0 auto;padding-top:28px}.quiz-top{display:flex;justify-content:space-between;gap:10px;align-items:center;margin-bottom:14px;font-size:12px;color:var(--muted)}.back-btn{border:0;background:none;color:#b5c1d0;padding:7px 0;display:flex;align-items:center;gap:7px;font-size:12px}.back-btn .icon{width:16px}.quiz-meta{display:flex;align-items:center;gap:17px}.quiz-progress{height:5px;border-radius:6px;background:#253347;margin-bottom:24px;overflow:hidden}.quiz-progress span{display:block;background:var(--gold);height:100%;transition:width .3s}.quiz-card{padding:30px 36px 26px;border:1px solid var(--line);border-radius:23px;background:linear-gradient(155deg,#1b283a,#152031);box-shadow:0 22px 60px #0000001c}.quiz-card-top{display:flex;justify-content:space-between;align-items:center;gap:10px}.quiz-source{display:flex;align-items:center;gap:10px;color:var(--muted);font-size:11px}.quiz-source .tag{font-size:11px}.quiz-star{width:33px;height:33px;border-radius:9px;background:transparent;border:1px solid var(--line);display:grid;place-items:center;color:var(--muted)}.quiz-star.active{color:var(--gold);border-color:#a58b56}.question-main{text-align:center;padding:21px 0 25px}.question-main h1{font:600 clamp(24px,3vw,33px)/1.7 var(--serif);margin:5px 0 13px;letter-spacing:2px;overflow-wrap:anywhere}.question-main h1 mark,.word-sentence mark{background:none;color:var(--gold);border-bottom:2px solid #edc37d70;padding:0 1px 4px}.question-main p{font-size:13px;color:var(--muted);margin:0}.question-main p b{color:var(--gold);font-weight:500}.options{display:grid;grid-template-columns:1fr 1fr;gap:12px}.option{border:1px solid #34445b;background:#20304770;color:#e2e5e9;min-height:73px;display:flex;align-items:center;text-align:left;gap:14px;padding:17px 18px;border-radius:12px;transition:border-color .2s,background .2s}.option:not(:disabled):hover{border-color:#b0935e;background:#edc37d0a}.option-letter{width:29px;height:29px;border-radius:7px;background:#2d405c;color:#b7cbe4;display:grid;place-items:center;font-size:12px;flex-shrink:0}.option-label{font-size:14px;flex:1;line-height:1.65}.option.correct{border-color:#8ed4b377;background:#8ed4b30b}.option.correct .option-letter{background:#8ed4b320;color:var(--green)}.option.incorrect{border-color:#f2a5a177;background:#f2a5a10b}.option.incorrect .option-letter{background:#f2a5a120;color:var(--red)}.option .answer-mark{width:16px;height:16px;color:var(--green)}.option.incorrect .answer-mark{color:var(--red)}.quiz-bottom{display:flex;align-items:center;justify-content:space-between;gap:14px;margin-top:19px}.quiz-bottom .text-btn{font-size:12px}.keyboard-tip{font-size:11px;color:var(--muted)}kbd{font:10px var(--sans);background:#263448;padding:3px 5px;border:1px solid #3c4a5e;border-radius:4px;color:#c4ccda}.feedback{margin-top:20px;border-top:1px solid var(--line);padding-top:21px;animation:appear .2s}.feedback-head{display:flex;justify-content:space-between;align-items:center;gap:10px;margin-bottom:11px}.feedback-result{font-size:14px;font-weight:500;color:var(--green);display:flex;align-items:center;gap:8px}.feedback-result.wrong{color:var(--red)}.feedback-answer{font-size:16px;color:var(--text);margin-bottom:14px}.feedback-answer b{color:var(--gold)}.analysis-grid{display:grid;gap:8px;font-size:13px;color:#c8d1dd}.analysis-grid p{margin:0}.analysis-label{color:var(--muted);display:inline-block;min-width:42px;margin-right:8px}.feedback-actions{display:flex;justify-content:space-between;align-items:center;margin-top:22px;gap:12px}.feedback-actions small{color:var(--muted);font-size:11px}.session-label{color:var(--gold);font-size:12px;letter-spacing:1px;margin:22px 0 0;text-align:center}.result-page{max-width:750px;margin:auto;text-align:center;padding-top:58px}.result-seal{width:75px;height:75px;background:#edc37d0c;border:1px solid #edc37d50;border-radius:50%;display:grid;place-items:center;margin:auto;color:var(--gold)}.result-seal .icon{height:35px;width:35px}.result-page h1{font:500 36px/1.5 var(--serif);letter-spacing:3px;margin:20px 0 8px}.result-page>p{color:var(--muted);font-size:13px}.result-stats{display:grid;grid-template-columns:repeat(3,1fr);border:1px solid var(--line);border-radius:16px;padding:25px 10px;margin:30px 0}.result-stats>div{border-right:1px solid var(--line)}.result-stats>div:last-child{border:0}.result-stats strong{font:500 32px/1.5 var(--sans);display:block;color:var(--gold)}.result-stats span{font-size:12px;color:var(--muted)}.result-actions{display:flex;justify-content:center;gap:12px;flex-wrap:wrap}.result-errors{text-align:left;margin-top:33px}.result-errors h2{font:500 20px var(--serif)}.result-error{border-bottom:1px solid var(--line);padding:13px 0;display:flex;gap:15px;font-size:13px}.result-error b{color:var(--gold);min-width:60px}.result-error span{color:#bbc6d5}.toast{position:fixed;bottom:25px;left:50%;transform:translateX(-50%);background:#e8d6b5;color:#202b39;border-radius:11px;box-shadow:0 5px 25px #0004;padding:12px 20px;z-index:100;font-size:13px;max-width:calc(100vw - 30px);text-align:center}.dialog{background:#192638;color:var(--text);border:1px solid #3b4b62;border-radius:20px;padding:28px;max-width:560px;width:calc(100% - 32px);box-shadow:0 25px 100px #0007}.dialog::backdrop{background:#060c16bb;backdrop-filter:blur(5px)}.dialog-head{display:flex;align-items:center;justify-content:space-between;gap:10px;margin-bottom:17px}.dialog-head h2{font:600 24px var(--serif);margin:0}.dialog h3{font-size:14px;margin:25px 0 8px;color:var(--gold)}.dialog p,.dialog li{font-size:13px;color:#bac6d5}.dialog ol{padding-left:20px}.dialog p{margin:9px 0}.dialog .dialog-actions{display:flex;gap:9px;flex-wrap:wrap;margin-top:15px}.danger{color:var(--red);margin-top:20px}.storage-warning{background:#edc37d10;border:1px solid #edc37d44;padding:12px 15px;color:var(--gold);border-radius:10px;font-size:12px;margin-bottom:20px}.focus-title:focus{outline:none}.icon defs{display:none}
@keyframes appear{from{opacity:0;transform:translateY(5px)}to{opacity:1;transform:translateY(0)}}
@media(min-width:1450px){.shell{max-width:1260px}.page{padding-top:52px}.hero h1{font-size:47px}.lesson-card{padding:25px}.lesson-card h3{font-size:28px}.lesson-count{margin-top:28px}}
@media(max-width:900px){.shell{padding:0 25px}.hero{grid-template-columns:1fr 210px;gap:24px}.hero-quote{gap:16px}.hero h1{font-size:35px}.lesson-grid{grid-template-columns:repeat(2,1fr)}.lesson-card h3{margin-top:12px}.lesson-count{margin-top:16px}.lesson-progress-info{margin-top:14px}.overview{padding:19px 0}.stat{padding:0 17px}.nav{gap:19px}.quiz-card{padding:26px}}
@media(max-width:600px){.shell{padding:0 19px}.masthead{height:auto;min-height:87px;align-items:flex-start;flex-wrap:wrap;padding-top:21px;gap:16px;padding-bottom:0}.brand{gap:10px}.seal{width:35px;height:35px;border-radius:9px;font-size:22px}.brand-name{font-size:19px}.brand-sub{font-size:8px;letter-spacing:1px}.nav{width:100%;justify-content:space-between;gap:13px}.nav-item{font-size:13px;padding:8px 2px 12px}.nav .icon-btn{width:29px;height:29px;margin-bottom:7px;border:0}.page{padding-top:30px;padding-bottom:30px}.hero{display:block}.hero-quote{display:none}.eyebrow{font-size:10px;letter-spacing:2px}.hero h1{font-size:32px;letter-spacing:1px;margin-top:15px;line-height:1.6}.hero-desc{font-size:12px;max-width:310px;line-height:1.9}.overview{margin:26px 0 29px;padding:17px 0;grid-template-columns:repeat(4,1fr);border-radius:13px}.stat{padding:0 10px}.stat-num{font-size:24px;letter-spacing:0}.stat-num em{font-size:10px;margin-left:2px}.stat-top{font-size:10px;gap:5px}.stat-top .icon{display:none}.stat .thin-progress{height:3px}.section-title{gap:7px}.section-title h2{font-size:19px}.section-title span{font-size:10px}.section-top>.text-btn{font-size:10px}.lesson-grid{gap:11px}.lesson-card{padding:16px 15px;border-radius:15px}.lesson-card h3{font-size:23px;letter-spacing:1px;margin-top:13px}.lesson-order{font-size:10px}.lesson-icon{height:26px;width:26px;border-radius:7px}.lesson-icon .icon{width:15px;height:15px}.lesson-author{font-size:10px}.lesson-count{font-size:10px;margin-top:17px;gap:5px}.lesson-progress-info{font-size:10px;margin-top:15px}.practice-strip{flex-direction:column;gap:11px;margin-top:17px}.mix-btn{padding:14px 18px}.mix-btn strong{font-size:14px}.daily-btn{width:100%;padding:13px 18px;gap:12px}.daily-btn small{margin-left:10px}.daily-btn>span{display:flex;align-items:center;flex:1}.daily-btn>.icon{height:20px;width:20px}.method-tip{font-size:10px;align-items:flex-start;text-align:center;margin-top:21px}.method-tip .icon{margin-top:1px}.footer{font-size:10px;padding-top:17px;gap:10px;flex-wrap:wrap}.footer button{font-size:10px}.page-heading{align-items:flex-start}.page-heading h1{font-size:27px}.page-heading p{font-size:11px}.page-heading .primary{padding:10px 12px;font-size:11px;white-space:nowrap}.filter-row{gap:8px}.search{flex-basis:100%}.filter-row select{flex:1;padding:10px 20px 10px 9px;font-size:12px}.word-item summary{padding:14px 13px;gap:10px}.word-char{width:51px;font-size:21px}.word-sentence{font-size:14px}.word-item summary .tag{font-size:9px;padding:3px 5px}.word-item summary>.icon{display:none}.word-detail{margin:0 13px;font-size:12px}.word-detail strong{font-size:15px}.quiz-page{padding-top:21px}.quiz-meta{gap:12px;font-size:10px}.quiz-top{margin-bottom:11px}.quiz-progress{margin-bottom:17px}.quiz-card{padding:19px 17px;border-radius:18px}.quiz-source{font-size:10px;gap:7px}.quiz-source .tag{font-size:10px}.question-main{padding:22px 0 24px}.question-main h1{font-size:25px;letter-spacing:1px}.question-main p{font-size:12px}.options{grid-template-columns:1fr;gap:10px}.option{min-height:61px;padding:13px 14px;gap:12px}.option-label{font-size:14px}.option-letter{width:28px;height:28px}.keyboard-tip{display:none}.quiz-bottom{margin-top:13px}.feedback-head .tag{font-size:9px}.feedback-result{font-size:13px}.analysis-grid{font-size:12px}.analysis-label{min-width:32px;margin-right:6px}.feedback-actions small{font-size:10px;max-width:135px}.feedback-actions .primary{font-size:12px;padding:11px 16px}.result-page{padding-top:35px}.result-page h1{font-size:30px}.result-stats{padding:20px 0}.result-stats strong{font-size:27px}.result-stats span{font-size:11px}.dialog{padding:22px}.resume{font-size:11px;padding:10px 12px;gap:10px}}
@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
/* 窄屏保留完整操作区，标题按语意分行。 */
body{min-width:280px}.thin-progress{display:block}
@media(max-width:600px){.hero h1 span{display:block}.stat{padding:0 8px}.stat-top{white-space:nowrap}.page-heading{flex-direction:column}.page-heading .secondary{font-size:12px;padding:9px 13px}.lesson-order{letter-spacing:1px}}
@media(max-width:380px){.lesson-order{font-size:9px;letter-spacing:0}.lesson-order .lesson-unit,.lesson-theme,.lesson-count i,.section-title>span{display:none}.daily-btn small{font-size:10px;margin-left:7px}.stat-top{font-size:9px}.stat-num{font-size:22px}.quiz-meta{gap:8px}.quiz-meta>span:first-child{max-width:100px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}}