/* 全站使用蓝、墨黑与白色，文字排版保持克制。 */
:root{--blue:#2463eb;--blue-dark:#174ac2;--blue-light:#edf3ff;--ink:#152037;--muted:#667184;--line:#e6eaf0;--paper:#fff;--soft:#f7f9fc;--green:#268366;--serif:"Noto Serif SC","Source Han Serif SC","STZhongsong","Songti SC","SimSun",serif;--sans:"Noto Sans SC","Source Han Sans SC","Microsoft YaHei","PingFang SC",sans-serif}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:96px}body{margin:0;background:var(--paper);color:var(--ink);font-family:var(--sans);font-size:16px;line-height:1.7;-webkit-font-smoothing:antialiased}button,a{-webkit-tap-highlight-color:transparent}button,input{font:inherit}button{cursor:pointer}a{color:inherit;text-decoration:none}button{color:inherit}button:focus-visible,a:focus-visible,summary:focus-visible{outline:3px solid #7fa9ff;outline-offset:5px}button:disabled{cursor:default}h1,h2,h3,h4,p{margin:0}h1,h2,h3{font-weight:600}button{border:0}svg{display:block}img{max-width:100%;display:block}[hidden]{display:none!important}::selection{background:#dce7ff}.icon{width:20px;height:20px;fill:none;stroke:currentColor;stroke-width:1.7;stroke-linecap:round;stroke-linejoin:round;flex-shrink:0}.icon-definitions{position:absolute;width:0;height:0;overflow:hidden}.blue{color:var(--blue)}.section-shell{max-width:1200px;margin-inline:auto;padding-inline:36px}.eyebrow{font-family:Georgia,serif;font-size:12px;letter-spacing:.14em;line-height:1.4;color:var(--blue);margin-bottom:20px}.skip-link{position:fixed;top:12px;left:16px;z-index:100;background:var(--ink);color:white;padding:12px 20px;transform:translateY(-150%);border-radius:8px}.skip-link:focus{transform:none}
/* 导航与首屏。 */
.site-header{height:80px;position:sticky;top:0;z-index:20;background:rgba(255,255,255,.92);border-bottom:1px solid rgba(230,234,240,.8);backdrop-filter:blur(18px)}.nav-shell{height:100%;max-width:1280px;padding:0 42px;margin:auto;display:flex;align-items:center;justify-content:space-between}.brand{display:inline-flex;align-items:center;gap:10px;font-size:19px;font-weight:700;letter-spacing:-.5px;white-space:nowrap}.brand-light{font-weight:400}.brand-icon{width:33px;height:36px;display:grid;place-items:center;color:var(--blue)}.brand-icon .icon{width:30px;height:30px;stroke-width:1.5}.main-nav{display:flex;align-items:center;gap:32px;font-size:14px}.main-nav>a{transition:color .2s}.main-nav>a:hover{color:var(--blue)}.main-nav .nav-download{background:var(--ink);color:white;padding:10px 19px;border-radius:7px}.main-nav .nav-download:hover{color:white;background:var(--blue)}.menu-toggle{display:none;background:transparent;padding:8px}.hero{padding-top:78px;padding-bottom:67px;position:relative;text-align:center}.hero-kicker{display:inline-flex;align-items:center;gap:9px;font-size:14px;color:#475670;margin-bottom:25px}.tiny-mark{width:8px;height:8px;background:var(--blue);transform:rotate(45deg)}.hero h1{font-family:var(--serif);font-size:clamp(42px,5.3vw,72px);line-height:1.35;letter-spacing:-.065em;font-weight:700}.ink-word{position:relative;display:inline-block}.ink-word>svg{position:absolute;bottom:1px;left:-3%;width:106%;height:9px;color:var(--blue);fill:none;stroke:currentColor;stroke-width:2;stroke-linecap:round}.blue-word{color:var(--blue)}.hero-description{font-size:16px;color:var(--muted);line-height:1.95;margin-top:24px}.hero-actions{display:flex;justify-content:center;align-items:center;gap:15px;margin-top:28px}.button{min-height:48px;border-radius:7px;display:inline-flex;align-items:center;justify-content:center;gap:12px;padding:12px 22px;line-height:1.5;font-weight:500;font-size:14px;transition:background .2s,transform .2s,box-shadow .2s}.button:hover{transform:translateY(-2px)}.button-primary{background:var(--blue);color:white;box-shadow:0 5px 14px #2463eb20}.button-primary:hover{background:var(--blue-dark);box-shadow:0 8px 20px #2463eb26}.button-text{background:white;border:1px solid var(--line)}.button-text:hover{background:var(--soft)}.button .icon{width:17px;height:17px}.hero-note{font-size:12px;color:#8791a1;margin-top:20px;letter-spacing:.03em}.hero-note>span{margin-inline:10px;color:#cbd2db}.hero-side-note{position:absolute;left:38px;bottom:95px;text-align:left;font-family:Georgia,serif;font-size:10px;line-height:1.6;color:#99a3b5;letter-spacing:.1em;transform:rotate(-90deg);transform-origin:left bottom}
/* 工作台：示意窗口与四步播放控制。 */
.workflow{padding-bottom:105px}.workflow-heading{display:flex;align-items:flex-end;justify-content:space-between;margin-bottom:24px}.workflow-heading .eyebrow{margin-bottom:10px}.workflow-heading h2{font-size:28px;letter-spacing:-.05em}.workflow-heading>p{font-size:14px;color:var(--muted);line-height:1.8;text-align:right}.demo{border:1px solid #dae1ed;border-radius:14px;background:var(--soft);box-shadow:0 16px 48px #172d4b0e,0 2px 5px #172d4b05;overflow:hidden}.demo-controls{padding:0 20px;background:white;display:flex;align-items:center;justify-content:space-between;border-bottom:1px solid var(--line)}.scene-tabs{display:flex;gap:23px}.scene-step{position:relative;padding:17px 0 16px;background:transparent;white-space:nowrap;font-size:14px;color:#7b8595;border-radius:2px}.scene-step>span{font-size:11px;letter-spacing:.04em;margin-right:4px}.scene-step[aria-selected=true]{color:var(--blue);font-weight:600}.scene-step[aria-selected=true]:before{content:"";position:absolute;bottom:-1px;height:2px;left:0;right:0;background:#d5e2ff}.scene-step[aria-selected=true]:after{content:"";position:absolute;bottom:-1px;height:2px;left:0;background:var(--blue);width:100%;transform-origin:left}.is-playing .scene-step[aria-selected=true]:after{animation:scene-progress 7.5s linear}.play-toggle{display:flex;align-items:center;gap:6px;background:none;font-size:12px;color:var(--muted);padding:8px}.play-toggle .icon{width:13px;height:13px}.workspace-window{margin:20px 22px 0;border:1px solid #d9e0ea;border-radius:9px;overflow:hidden;background:white;box-shadow:0 3px 16px #15203708}.window-chrome{height:34px;background:#f0f3f8;display:flex;align-items:center;justify-content:center;position:relative;font-size:11px;color:#778397;border-bottom:1px solid #e3e8f0}.window-dots{display:flex;gap:5px;position:absolute;left:13px}.window-dots i{width:7px;height:7px;border-radius:50%;background:#c4ccda}.window-dots i:first-child{background:#e9a3a3}.window-dots i:nth-child(2){background:#e8cb93}.window-dots i:last-child{background:#a5ccbd}.demo-label{position:absolute;right:12px;font-size:10px;color:#67778e;background:white;border:1px solid #dfe5ef;border-radius:4px;padding:1px 7px}.workspace-nav{height:55px;display:flex;align-items:center;justify-content:space-between;padding:0 19px;border-bottom:1px solid var(--line)}.workspace-brand{display:flex;align-items:center;gap:7px;font-size:12px;font-weight:600;white-space:nowrap}.workspace-brand .icon{color:var(--blue);width:19px;height:19px}.workspace-nav-items{display:flex;gap:24px;font-size:11px;color:#8992a2}.workspace-nav-items>span{padding:7px 9px}.workspace-nav-items .selected{background:var(--blue-light);color:var(--blue);border-radius:5px}.workspace-avatar{height:23px;width:23px;font-family:Georgia,serif;border-radius:50%;display:grid;place-items:center;font-size:11px;color:white;background:var(--blue)}.scene-panel{height:356px;display:grid;animation:scene-in .45s ease-out;background:white;font-size:12px;line-height:1.75;overflow:hidden}.collect-scene{grid-template-columns:160px 1fr 1.12fr}.mini-sidebar{background:#f8faff;border-right:1px solid var(--line);padding:20px 12px;position:relative}.mini-overline{font-size:10px;color:#9aa3b1;display:block;padding-left:12px;margin-bottom:14px}.tree-row{display:flex;align-items:center;gap:7px;padding:7px 11px;font-size:11px;color:#6b768b;border-radius:5px}.tree-row .icon{width:14px;height:14px}.tree-row.selected{background:#eaf1ff;color:var(--blue)}.tree-row.child{padding-left:24px}.tree-row.grandchild{padding-left:35px;font-size:10px;white-space:nowrap}.tree-row>span{margin-left:auto;font-size:9px;color:#97a3b6}.sidebar-bottom{position:absolute;left:22px;bottom:18px;font-size:9px;color:#98a2b4}.mini-pane-heading{display:flex;align-items:center;justify-content:space-between;gap:8px;margin-bottom:16px}.mini-pane-heading h3{font-size:12px;font-weight:600}.mini-pane-heading>.icon{width:15px;height:15px;color:var(--blue)}.mini-chip{font-size:9px;line-height:1.5;color:#7a87a0;background:#f2f5f9;border-radius:4px;padding:3px 6px;white-space:nowrap}.mini-chip.green{color:var(--green);background:#edf7f3}.import-pane{padding:22px 26px;border-right:1px solid var(--line);background:#fcfdff}.source-sheet{position:relative;background:white;border:1px solid #dce3ed;padding:27px 21px 19px;margin-top:21px;height:227px;box-shadow:0 3px 10px #18335507;overflow:hidden}.source-sheet-label{position:absolute;top:0;left:0;color:#8892a4;padding:3px 9px;font-size:9px;background:#f2f4f8}.paper-corner{position:absolute;right:-1px;top:-1px;width:18px;height:18px;background:linear-gradient(45deg,#f1f5fa 49%,#fcfdff 51%);border-left:1px solid var(--line);border-bottom:1px solid var(--line)}.sheet-number{font-size:10px;font-weight:600;color:#3d4961;margin-bottom:11px}.source-sheet>p:not(.sheet-number){font-size:10px;color:#687384;font-family:var(--serif)}.source-formula{display:flex;align-items:center;gap:8px;justify-content:center;font-family:Georgia,serif;font-style:italic;font-size:24px;margin-top:10px}.fraction{display:inline-flex;flex-direction:column;font-size:17px;line-height:1.3;text-align:center}.fraction>span:first-child{border-bottom:1px solid var(--ink);padding-bottom:1px}.sheet-lines{display:flex;flex-direction:column;gap:7px;margin-top:16px}.sheet-lines i{height:4px;background:#f0f2f6;width:90%}.sheet-lines i:nth-child(2){width:72%}.sheet-lines i:nth-child(3){width:83%}.scan-line{position:absolute;left:0;right:0;height:1px;top:10%;background:#4580f8;box-shadow:0 -12px 24px 12px #4389ff0c;animation:scan 4.5s ease-in-out infinite}.import-footer{display:flex;justify-content:center;align-items:center;gap:6px;color:#8793a6;font-size:10px;margin-top:15px}.import-footer .icon{width:12px;height:12px}.review-pane{padding:22px 25px;position:relative}.field-label{font-size:10px;color:#9aa3b1;margin-top:12px;margin-bottom:7px}.question-stem{font-size:12px;line-height:1.9;color:#435169}.mock-options{display:grid;grid-template-columns:1fr 1fr;gap:5px;margin-top:11px;color:#657189;font-size:11px}.mini-tags{display:flex;gap:5px;flex-wrap:wrap}.mini-tags>span{color:var(--blue);background:var(--blue-light);border-radius:3px;padding:2px 7px;font-size:9px}.mock-form-bottom{position:absolute;bottom:23px;left:25px;right:25px;display:flex;align-items:center;justify-content:space-between;gap:8px}.mock-form-bottom>span:first-child{display:flex;align-items:center;gap:4px;font-size:9px;color:#8092ad}.mock-form-bottom .icon{width:12px;height:12px;color:var(--green)}.mock-button{display:inline-flex;align-items:center;justify-content:center;background:var(--blue);color:white;padding:7px 11px;border-radius:4px;font-size:10px;white-space:nowrap}.demo-caption{min-height:56px;display:flex;justify-content:space-between;align-items:center;padding:15px 24px;gap:20px;font-size:12px;color:#6e7d94}.caption-index{font-family:Georgia,serif;font-size:12px;letter-spacing:.1em;white-space:nowrap;color:#8d9aaf}.demo-disclaimer{color:#9aa3b0;font-size:12px;margin-top:17px;text-align:center}
/* 查题与试卷篮示意。 */
.search-scene{grid-template-columns:160px 1.45fr 1fr}.search-pane{padding:18px 20px;border-right:1px solid var(--line);background:#fcfdff}.mock-search{height:32px;border:1px solid #c8d9ff;border-radius:5px;display:flex;align-items:center;padding:0 10px;gap:7px;box-shadow:0 0 0 3px #2463eb05}.mock-search .icon{width:13px;height:13px;color:var(--blue)}.typed-query{font-size:11px;color:#6a7c99;overflow:hidden;white-space:nowrap;animation:query-reveal 1.5s ease-out;width:210px}.search-caret{height:12px;width:1px;background:var(--blue);animation:caret-blink 1s step-end infinite}.mock-filters{display:flex;gap:7px;padding:11px 0;font-size:9px;color:#7d8aa2}.mock-filters span{background:#eff3f8;border:1px solid #e5ebf3;padding:1px 7px;border-radius:3px}.mock-result{border:1px solid var(--line);background:white;border-radius:5px;padding:10px 12px;margin-bottom:8px;position:relative}.mock-result.active{border-color:#a9c2fc;box-shadow:0 2px 8px #2463eb08}.result-type{font-size:9px;color:var(--blue);background:var(--blue-light);padding:2px 5px;border-radius:3px}.result-difficulty{font-size:9px;color:#9b7a37;margin-left:6px}.mock-result h3{font-size:11px;font-weight:500;margin-top:5px}.mock-result p{font-size:9px;color:#8d99ad;margin-top:3px}.added-badge{position:absolute;top:10px;right:10px;font-size:9px;color:var(--green);display:flex;gap:3px;align-items:center}.added-badge .icon{width:10px;height:10px}.basket-pane{padding:22px 20px;position:relative}.basket-count{width:18px;height:18px;border-radius:4px;background:var(--blue-light);color:var(--blue);display:grid;place-items:center;font-size:10px}.muted-small{font-size:10px;color:#97a2b5}.basket-item{display:flex;align-items:center;gap:10px;padding:13px 0;border-bottom:1px solid #eef1f6;font-size:11px;animation:scene-in .6s ease-out both}.basket-item:nth-of-type(3){animation-delay:.15s}.basket-item:nth-of-type(4){animation-delay:.3s}.basket-item>span{font-family:Georgia,serif;color:#a6b3ca;font-size:12px}.basket-item p{font-size:9px;color:#9aa4b5}.basket-item>.icon{margin-left:auto;width:12px;height:12px;color:var(--green)}.full-width{position:absolute;left:20px;right:20px;bottom:24px}
/* 细目表与试卷预览。 */
.assemble-scene{grid-template-columns:1fr 1.15fr}.assembly-controls{padding:23px 28px;border-right:1px solid var(--line)}.mock-mode{display:flex;background:var(--soft);border:1px solid var(--line);border-radius:5px;padding:3px;font-size:10px;gap:3px;margin-bottom:17px}.mock-mode>span{width:50%;text-align:center;padding:5px;color:#8995a9}.mock-mode .selected{background:white;color:var(--blue);border-radius:3px;box-shadow:0 1px 3px #13203910}.mock-input{background:#fcfdff;border:1px solid var(--line);border-radius:4px;padding:7px 10px;font-size:11px}.spec-grid{display:grid;grid-template-columns:1.7fr 1fr .65fr;border:1px solid var(--line);border-radius:5px;overflow:hidden;margin-top:8px;font-size:10px}.spec-grid>*{padding:7px 9px;border-bottom:1px solid var(--line);font-weight:400}.spec-grid>*:nth-child(-n+3){background:#f4f7fc;color:#8b96aa}.spec-grid>*:nth-last-child(-n+3){border-bottom:none}.spec-grid b{color:var(--blue);font-weight:500;text-align:center}.assembly-summary{display:flex;align-items:center;justify-content:space-between;margin-top:23px;gap:10px;font-size:9px;color:#8a97af}.paper-preview-pane{background:#f4f6fa;padding:17px 26px;position:relative;overflow:hidden}.preview-toolbar{display:flex;justify-content:space-between;align-items:center;font-size:10px;color:#8b98ad;margin-bottom:12px}.preview-toolbar>div{display:flex;gap:8px}.preview-toolbar>div>span{color:var(--blue);background:white;border:1px solid #dfe6f3;border-radius:3px;padding:1px 7px}.preview-paper{background:white;border:1px solid #e0e4eb;box-shadow:0 6px 20px #162b4a09;padding:21px 25px;height:327px;transform:rotate(-1deg);transition:transform .5s}.demo:hover .preview-paper{transform:rotate(0)}.paper-identity{font-family:Georgia,serif;letter-spacing:.09em;font-size:7px;color:#a4aec0;text-align:center}.preview-paper h3{font-family:var(--serif);font-size:16px;text-align:center;margin:8px 0 13px}.paper-student{text-align:center;font-size:9px;color:#818ca0;padding-bottom:12px;border-bottom:1px solid var(--line)}.preview-paper h4{font-family:var(--serif);font-size:10px;margin-top:10px;margin-bottom:3px}.preview-paper p{font-size:9px;color:#738097}.paper-options{font-size:9px;color:#8994a5;margin-top:4px}.answer-lines{display:flex;flex-direction:column;gap:12px;margin-top:10px}.answer-lines i{height:1px;background:#e6eaf0}.export-stamp{position:absolute;bottom:15px;right:20px;display:flex;align-items:center;gap:6px;padding:8px 12px;border:1px solid #d9e5ff;border-radius:5px;background:#f5f8ff;box-shadow:0 4px 14px #112d5310;font-size:10px;color:var(--blue);transform:rotate(2deg)}.export-stamp .icon{width:13px;height:13px}
/* 讲解与物理动画。 */
.explain-scene{grid-template-columns:1fr 1fr}.tutor-pane{padding:23px 26px;border-right:1px solid var(--line);position:relative}.tutor-question{margin:10px 0 19px 35px;background:var(--blue-light);border-radius:8px 8px 2px 8px;padding:11px 14px;font-size:11px;line-height:1.8;color:#4b6b9f}.tutor-response{display:flex;gap:11px;align-items:flex-start}.tutor-avatar{height:24px;width:24px;border-radius:6px;display:grid;place-items:center;background:var(--blue-light);color:var(--blue);flex-shrink:0}.tutor-avatar .icon{width:13px;height:13px}.tutor-response strong{font-size:11px;font-weight:600}.tutor-response p{font-size:10px;line-height:1.9;color:#7c889e;margin-top:8px}.tutor-note{display:block;font-size:9px;margin-top:10px;color:#adb6c6}.tutor-input{position:absolute;bottom:20px;left:26px;right:26px;border:1px solid var(--line);border-radius:5px;display:flex;justify-content:space-between;padding:9px 12px;color:#a4afc1;font-size:10px}.tutor-input .icon{width:12px;height:12px;color:var(--blue)}.simulation-pane{padding:23px 26px;background:#fcfdff}.simulation-pane .mini-pane-heading{margin-bottom:4px}.orbit-stage{height:190px;position:relative;overflow:hidden}.orbit-grid{position:absolute;inset:0;opacity:.7;background-image:linear-gradient(#ecf0f7 1px,transparent 1px),linear-gradient(90deg,#ecf0f7 1px,transparent 1px);background-size:22px 22px;mask-image:radial-gradient(ellipse,black 25%,transparent 74%)}.orbit-path{width:132px;height:132px;border:1px dashed #b4c8eb;border-radius:50%;position:absolute;top:18px;left:calc(50% - 66px)}.orbit-arm{position:absolute;inset:0;animation:orbit 9s linear infinite}.orbit-ball{position:absolute;width:13px;height:13px;left:calc(50% - 6px);top:-7px;border:3px solid white;border-radius:50%;background:var(--blue);box-shadow:0 0 0 1px #89acff,0 0 15px #2463eb30}.force-line{width:1px;height:46px;background:#e69a51;position:absolute;top:7px;left:50%}.force-line:after{content:"";position:absolute;bottom:0;left:-3px;width:6px;height:6px;border-right:1px solid #e69a51;border-bottom:1px solid #e69a51;transform:rotate(45deg)}.orbit-center{position:absolute;top:calc(50% - 10px);left:calc(50% - 4px);font-family:Georgia,serif;font-size:12px;color:#7f90ad}.formula-note{position:absolute;right:9px;top:5px;font:italic 17px Georgia,serif;color:#607cb3}.force-legend{position:absolute;bottom:8px;left:0;right:0;display:flex;justify-content:center;align-items:center;gap:5px;font-size:9px;color:#99a6bc}.force-legend>i{height:5px;width:5px;background:#e69a51;border-radius:50%}.mock-sliders{display:flex;flex-direction:column;gap:11px;padding-top:9px}.mock-sliders>div{display:flex;align-items:center;gap:12px;font-size:9px;color:#8795ac}.mock-sliders span{width:48px;flex-shrink:0}.mock-sliders b{font-size:9px;font-weight:400;min-width:40px;text-align:right}.mock-sliders i{position:relative;height:3px;background:#e7edf7;flex:1;border-radius:3px}.mock-sliders i:before{content:"";position:absolute;left:0;height:100%;width:var(--fill);background:#91b2fc}.mock-sliders i:after{content:"";position:absolute;left:var(--fill);top:-3px;width:9px;height:9px;background:white;border:2px solid #83a8f8;border-radius:50%;box-shadow:0 1px 3px #13203910}.demo.is-paused .scan-line,.demo.is-paused .orbit-arm,.demo.is-paused .search-caret{animation-play-state:paused!important}.workspace-image{width:100%;height:356px;object-fit:contain;background:#f5f7fb}
/* 三个痛点：轻量卡片与信息关系示意。 */
.pain-section{padding-top:20px;padding-bottom:105px}.section-heading h2,.scenario-heading h2,.teacher-section h2,.faq-heading h2{font-family:var(--serif);font-size:clamp(29px,3.2vw,42px);line-height:1.45;letter-spacing:-.045em}.section-heading>p:last-child{font-size:14px;color:var(--muted);margin-top:20px}.pain-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:20px;margin-top:42px}.pain-card{border:1px solid var(--line);border-radius:10px;padding:27px 27px 0;overflow:hidden;transition:transform .3s,box-shadow .3s}.pain-card:hover{transform:translateY(-5px);box-shadow:0 12px 30px #172d4b08}.pain-index{font-family:Georgia,var(--sans);font-size:12px;letter-spacing:.03em;color:#8493ad}.before-line{font-size:12px;color:#8b96a7;margin-top:28px;margin-bottom:7px}.pain-card h3{font-family:var(--serif);font-size:23px;letter-spacing:-.04em}.pain-card>p{font-size:14px;color:#7b879a;line-height:1.9;margin-top:13px}.pain-visual{height:112px;display:flex;align-items:center;justify-content:center;font-size:11px;color:#7b8dab;background:linear-gradient(0deg,#f4f8ff,transparent);margin:24px -27px 0;padding:20px 20px;position:relative}.file-tag{padding:6px 7px;background:white;border:1px solid #dce5f4;border-radius:3px;font-size:10px;box-shadow:0 3px 7px #18345605}.file-tag:first-child{transform:rotate(-10deg) translateY(-7px)}.file-tag:nth-child(2){transform:rotate(4deg) translateY(6px);margin-left:-4px}.file-tag:nth-child(3){transform:rotate(-3deg) translateY(-3px);margin-left:-4px}.tidy-line{width:24px;margin:0 10px;height:1px;background:#b6cbee;position:relative}.tidy-line:after{content:"";height:5px;width:5px;position:absolute;right:0;top:-2px;background:var(--blue);border-radius:50%}.organized-tag{display:flex;gap:6px;align-items:center;background:white;border:1px solid #c7d8fb;border-radius:5px;padding:9px 12px;color:var(--blue)}.organized-tag .icon{height:15px;width:15px}.compose-visual{gap:5px}.compose-visual>span{background:white;border:1px solid #e0e7f3;padding:5px;border-radius:3px;font-size:9px}.compose-result{display:flex;gap:6px;align-items:center;color:var(--blue);margin-left:10px;padding:8px;background:white;border:1px solid #c6d9fe;border-radius:5px;transform:rotate(3deg)}.compose-result .icon{width:17px;height:17px}.formula-card{font:italic 19px Georgia,serif;background:white;border:1px solid #d7e3f8;border-radius:5px;color:#5374b1;padding:12px 11px;transform:rotate(-4deg)}.relation-lines{display:flex;flex-direction:column;gap:9px;width:31px;margin-inline:13px}.relation-lines>i{background:#c2d4f4;height:1px;width:100%}.relation-lines>i:first-child{transform:rotate(-12deg)}.relation-lines>i:last-child{transform:rotate(12deg)}.explain-tag{font-size:10px;color:var(--blue);line-height:1.8}
/* 教学场景与教师决策。 */
.scenarios-section{background:#f7f9fd;border-top:1px solid #edf0f7;border-bottom:1px solid #edf0f7;padding-top:78px;padding-bottom:77px}.scenario-heading{display:flex;justify-content:space-between;align-items:flex-end}.scenario-heading>p{font-size:14px;color:var(--muted);line-height:1.9}.scenario-list{margin-top:41px;border-top:1px solid #dce3ef}.scenario-row{display:grid;grid-template-columns:60px 1fr 1.05fr 100px;gap:22px;align-items:center;padding:29px 0;border-bottom:1px solid #dce3ef}.scenario-number{font:italic 32px Georgia,serif;color:#b1bfd7}.scenario-title>span{font-size:12px;color:#8b97aa}.scenario-title h3{font-size:20px;letter-spacing:-.04em;margin-top:6px}.scenario-row>p{font-size:14px;line-height:1.9;color:#77869d}.scenario-tokens{display:flex;flex-direction:column;align-items:flex-end;gap:5px}.scenario-tokens>span{font-size:10px;border:1px solid #dde5f4;border-radius:3px;padding:2px 7px;color:#7f91b0;background:white}.teacher-section{padding-top:93px;padding-bottom:93px;display:grid;grid-template-columns:120px 1fr 230px;gap:25px;align-items:center}.teacher-mark{font-family:Georgia,serif;font-size:99px;font-style:italic;line-height:1;letter-spacing:-.1em;color:var(--blue)}.teacher-mark>span{color:#a9c2f8}.teacher-section .eyebrow{margin-bottom:15px}.teacher-section h2{font-size:33px}.teacher-section p:last-child{font-size:14px;line-height:1.9;margin-top:18px;color:var(--muted)}.teacher-checks{display:flex;flex-direction:column;gap:20px;font-size:13px;color:#71809b}.teacher-checks>span{display:flex;align-items:center;gap:10px}.teacher-checks .icon{width:18px;height:18px;color:var(--blue)}
/* 问答与底部下载。 */
.faq-section{display:grid;grid-template-columns:1fr 1.5fr;gap:75px;border-top:1px solid var(--line);padding-top:73px;padding-bottom:93px}.faq-heading h2{font-size:31px}.faq-list details{border-bottom:1px solid var(--line)}.faq-list summary{list-style:none;display:flex;align-items:center;justify-content:space-between;gap:20px;cursor:pointer;padding:20px 0;font-size:15px;font-weight:500}.faq-list summary::-webkit-details-marker{display:none}.faq-plus{color:#8e9cb0;font-size:22px;line-height:1;font-weight:300;transition:transform .2s}.faq-list details[open] .faq-plus{transform:rotate(45deg);color:var(--blue)}.faq-list details>p{font-size:14px;line-height:1.9;color:#7a879c;padding:0 28px 22px 0}.download-section{background:#2059d4;color:white;position:relative;overflow:hidden}.download-section:before{content:"";position:absolute;inset:0;pointer-events:none;background:linear-gradient(120deg,#0c33720a,transparent 55%),repeating-linear-gradient(90deg,transparent 0,transparent 159px,#ffffff04 160px)}.download-grid{position:relative;display:grid;grid-template-columns:1.25fr 1fr;gap:80px;align-items:center;padding-top:70px;padding-bottom:72px}.download-copy .eyebrow{color:#adcbff;margin-bottom:18px}.download-copy h2{font-family:var(--serif);font-size:40px;line-height:1.45;letter-spacing:-.045em}.download-copy>p:not(.eyebrow){color:#bcd2fb;font-size:14px;margin-top:18px}.download-action{margin-top:29px}.button-light{background:white;color:#2156bf;border:1px solid white;font-weight:500}.button-light:hover{background:#f1f6ff;box-shadow:0 8px 24px #0b358b35}.release-note{display:block;color:#abc6f7;font-size:12px;line-height:1.8;margin-top:15px}.contact-card{background:#ffffff0b;border:1px solid #ffffff30;border-radius:10px;padding:29px 29px 20px;position:relative}.contact-kicker{font-family:Georgia,serif;font-size:11px;letter-spacing:.16em;color:#a7c5ff}.contact-card h3{font-family:var(--serif);font-size:25px;letter-spacing:-.035em;margin-top:19px}.contact-card>p{font-size:13px;line-height:1.9;color:#bdcff0;margin-top:13px}.contact-line{display:flex;align-items:center;gap:9px;color:#dee9ff;margin-top:28px;padding-bottom:20px;font-size:14px;overflow-wrap:anywhere}.contact-line .icon{width:17px;height:17px;color:#a6c5ff}.contact-bottom{border-top:1px solid #ffffff21;padding-top:18px;display:flex;align-items:center;justify-content:space-between;gap:12px}.contact-bottom>span{font-size:11px;color:#abc5f2}.contact-bottom>button{background:#ffffff17;border:1px solid #ffffff30;color:white;border-radius:5px;padding:5px 10px;font-size:11px;white-space:nowrap}.contact-bottom>button:hover{background:#ffffff2c}.contact-qr{margin-top:20px;display:flex;align-items:center;gap:15px;font-size:12px;color:#d4e3ff}.contact-qr img{width:96px;height:96px;object-fit:contain;background:white;border-radius:4px;padding:4px}.site-footer{padding-top:32px;padding-bottom:32px;display:flex;align-items:center;justify-content:space-between;gap:20px}.site-footer .brand{font-size:16px}.site-footer .brand-icon{width:27px;height:28px}.site-footer .brand-icon .icon{width:25px;height:25px}.site-footer>p,.site-footer>span{font-size:11px;color:#9aa4b3}.site-footer>p{margin-left:auto;margin-right:24px}
/* 提示弹窗与可访问状态。 */
.mobile-desktop-note{display:none;font-size:11px;color:#7c8ca5;margin-top:9px;line-height:1.8}.download-device-note{display:block;font-size:12px;line-height:1.8;color:#c5d8fd;margin-top:10px}
.info-dialog{border:1px solid var(--line);padding:0;border-radius:15px;max-width:440px;width:calc(100% - 40px);color:var(--ink);box-shadow:0 24px 80px #15203722}.info-dialog::backdrop{background:#14203650;backdrop-filter:blur(3px)}.dialog-content{position:relative;padding:36px}.dialog-close{position:absolute;right:14px;top:14px;padding:6px;background:transparent;color:#8a97ac;border-radius:4px}.dialog-icon{display:inline-flex;background:var(--blue-light);padding:10px;border-radius:8px;color:var(--blue);margin-bottom:20px}.dialog-content h2{font-family:var(--serif);font-size:25px;margin-bottom:14px}.dialog-content p{font-size:14px;color:var(--muted);line-height:1.9}.dialog-confirm{margin-top:26px;min-width:100px}.toast{position:fixed;bottom:28px;left:50%;transform:translateX(-50%);z-index:50;background:var(--ink);color:white;border-radius:8px;padding:12px 20px;font-size:14px;max-width:calc(100% - 40px);box-shadow:0 8px 20px #15203726}.motion-ready .reveal{opacity:0;transform:translateY(18px);transition:opacity .7s ease,transform .7s ease}.motion-ready .reveal.in-view{opacity:1;transform:none}.pain-card:nth-child(2){transition-delay:.08s}.pain-card:nth-child(3){transition-delay:.16s}
@keyframes scene-progress{from{transform:scaleX(0)}to{transform:scaleX(1)}}@keyframes scene-in{from{opacity:0;transform:translateY(5px)}to{opacity:1;transform:translateY(0)}}@keyframes scan{0%,100%{top:13%;opacity:0}15%,85%{opacity:1}50%{top:90%}}@keyframes query-reveal{from{width:0}to{width:210px}}@keyframes caret-blink{50%{opacity:0}}@keyframes orbit{to{transform:rotate(360deg)}}
/* 平板：保持完整的演示逻辑，缩小工作台次要区域。 */
@media(max-width:1020px){.section-shell{padding-inline:28px}.nav-shell{padding-inline:30px}.main-nav{gap:24px}.hero-side-note{display:none}.hero{padding-top:65px}.collect-scene{grid-template-columns:132px .95fr 1.12fr}.search-scene{grid-template-columns:132px 1.25fr .95fr}.mini-sidebar{padding-inline:8px}.tree-row.grandchild{padding-left:23px}.sidebar-bottom{left:14px;font-size:8px}.import-pane,.review-pane{padding-inline:19px}.mock-form-bottom{left:19px;right:19px;flex-direction:column;align-items:flex-start;gap:10px}.mock-form-bottom .mock-button{align-self:flex-end}.source-sheet{padding-inline:14px}.search-pane{padding-inline:14px}.basket-pane{padding-inline:15px}.full-width{left:15px;right:15px}.added-badge{font-size:8px}.scene-tabs{gap:17px}.pain-card{padding:24px 21px 0}.pain-card h3{font-size:20px}.pain-visual{margin-inline:-21px}.scenario-row{grid-template-columns:42px 1fr 1.05fr 85px;gap:15px}.scenario-title h3{font-size:17px}.teacher-section{grid-template-columns:90px 1fr 205px}.teacher-mark{font-size:83px}.faq-section{gap:45px}.download-grid{gap:40px}.download-copy h2{font-size:35px}.contact-card{padding:25px}.contact-card h3{font-size:22px}.site-footer>p{display:none}}
/* 手机：演示变成单一主操作，避免缩成不可读的桌面截图。 */
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/* 介绍正文保持易读，示意窗口中的小字仅用于桌面界面展示。 */
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