:root{--brand:#214e72;--ink:#19364d;--muted:#5d7283;--line:#d7e1e9;--soft:#edf3f7;--surface:#fff;--accent:#9b8050;--radius:14px;--page:#f3f6f8;--shadow:0 8px 24px #18395309;color-scheme:light}
*{box-sizing:border-box}html{scroll-behavior:smooth;scroll-padding-top:60px}body{margin:0;color:var(--ink);background:var(--page);font:14px/1.6 "Microsoft YaHei","PingFang SC",Arial,sans-serif}button,input,select{font:inherit}button,a,select,input{-webkit-tap-highlight-color:transparent}button{cursor:pointer;color:inherit}button:disabled{cursor:default}button,a{touch-action:manipulation}a{color:inherit;text-decoration:none}h1,h2,h3,p{margin:0}h1{font-size:27px;line-height:1.4;letter-spacing:.015em}h2{font-size:22px;line-height:1.4}h3{font-size:16px;line-height:1.5}img{display:block;max-width:100%}button:focus-visible,a:focus-visible,input:focus-visible,select:focus-visible{outline:3px solid #5084ab;outline-offset:3px}button:disabled{opacity:.45}.container{width:min(1200px,calc(100% - 48px));margin-inline:auto}.button{min-height:44px;display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:8px 17px;color:#fff;border:1px solid var(--brand);border-radius:7px;background:var(--brand);font-weight:600}.button.secondary{background:var(--surface);color:var(--brand);border-color:var(--line)}.text-button{border:0;background:none;color:var(--brand);min-height:44px;padding:6px 0;font-size:13px}.panel{border:1px solid var(--line);background:var(--surface);border-radius:var(--radius)}.tag{display:inline-flex;padding:2px 7px;background:var(--soft);color:var(--brand);font-size:11px;border-radius:4px}.section-head{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:14px}.section-head h2{display:flex;align-items:center;gap:9px}.section-head h2:before{content:"";width:3px;height:19px;border-radius:2px;background:var(--brand)}.section-head p{font-size:12px;color:var(--muted);margin-top:4px}.section-count{font-size:12px;color:var(--muted);font-weight:400}.eyebrow{font-size:12px;color:var(--muted);letter-spacing:.08em;margin-bottom:6px}.muted{color:var(--muted)}
.workbar{position:sticky;top:0;z-index:50;min-height:48px;display:flex;justify-content:space-between;align-items:center;gap:12px;padding:5px 24px;color:#eaf2f7;background:#18364e;font-size:12px}.workbar>div{display:flex;gap:18px;align-items:center}.workbar button{border:1px solid #718696;border-radius:5px;background:transparent;color:inherit;padding:5px 10px;min-height:34px}.workbrand{font-weight:700;font-size:13px;white-space:nowrap}.workbrand span{font-weight:400;margin-left:12px;opacity:.75}.controls{background:#edf2f5;border-bottom:1px solid #d1dce4;padding:18px 0 12px}.controls[hidden]{display:none}.control-intro{display:flex;align-items:start;justify-content:space-between;gap:20px}.control-intro strong{font-size:14px}.control-intro p{color:#617384;font-size:12px;margin-top:3px}.control-grid{display:grid;grid-template-columns:repeat(5,minmax(0,1fr));gap:14px;margin-top:14px}.control-grid label{font-size:12px;color:#536a7b}.control-grid select{display:block;width:100%;margin-top:4px}select{border:1px solid #c8d5df;border-radius:6px;padding:8px 9px;background:white;color:#24475f;min-height:40px}.control-bottom{display:flex;align-items:center;gap:18px;flex-wrap:wrap;font-size:12px;margin-top:12px}.control-bottom select{padding:4px 6px;font-size:12px;min-height:34px}.control-bottom>label{display:flex;align-items:center;gap:7px}.control-bottom>a{margin-left:auto}.upload-label{cursor:pointer;color:#365c7b;border-bottom:1px solid #9bb2c3;min-height:34px}.upload-label input{position:absolute;width:1px;height:1px;opacity:0}.upload-label:focus-within{outline:3px solid #5084ab}.effects-label input{accent-color:var(--brand);width:16px;height:16px}.combination-note{font-size:11px;color:#627486;margin-top:8px;min-height:18px}
#site-header{background:var(--surface);border-bottom:1px solid var(--line)}.brand-nav{height:78px;display:flex;justify-content:space-between;align-items:center;gap:22px}.site-brand{display:flex;align-items:center;gap:10px}.site-brand img{width:38px;height:38px}.site-brand strong{font-size:17px;line-height:1.4;max-width:350px}.site-nav{display:flex;align-items:center;gap:2px}.site-nav button{border:none;background:none;min-height:44px;padding:7px 10px;font-size:14px;white-space:nowrap}.site-nav .personal{border:1px solid var(--line);border-radius:6px;margin-left:6px}.mobile-nav-toggle{display:none}.skip-link{position:fixed;top:-100px;left:10px;background:white;padding:10px;z-index:99}.skip-link:focus{top:55px}.page-intro{display:flex;align-items:center;justify-content:space-between;padding:24px 0 20px}.page-intro .eyebrow{margin-bottom:3px}#hero-mount,#topics-mount,#flow-mount{margin-bottom:22px}.hero-composition{display:grid;gap:18px;align-items:stretch}.hero-layout-1{grid-template-columns:minmax(0,1.65fr) minmax(0,1fr)}.hero-visual{overflow:hidden;min-width:0;display:flex;flex-direction:column;min-height:0;background:var(--soft);position:relative}.hero-image-frame{flex:1;min-height:0;height:244px;display:flex;align-items:center;justify-content:center;padding:0;background:linear-gradient(145deg,#e7f0f7,#f3f7fa)}.hero-image-frame img{height:100%;width:100%;object-fit:contain}.hero-caption{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:15px 22px;border-top:1px solid var(--line);background:var(--surface)}.hero-caption strong{font-size:19px;letter-spacing:.04em;font-weight:650}.hero-caption p{font-size:12px;color:var(--muted);margin-top:3px}.hero-caption .hero-seal{width:34px;height:34px;border:1px solid color-mix(in srgb,var(--accent) 45%,transparent);display:grid;place-items:center;border-radius:50%;font-size:18px;color:var(--accent);flex:none}.registration-mount{container-type:inline-size;min-width:0;align-self:stretch}.hero-layout-2{grid-template-columns:minmax(0,1.2fr) minmax(0,1fr);gap:22px;padding:18px;background:linear-gradient(115deg,var(--soft),var(--surface));border:1px solid var(--line);border-radius:var(--radius);position:relative}.hero-layout-2 .hero-visual{background:transparent;border:0;flex-direction:column-reverse}.hero-layout-2 .hero-image-frame{height:210px;margin:8px 0 0;border-radius:8px;background:transparent}.hero-layout-2 .hero-caption{background:transparent;border:0;padding:6px 8px 6px 2px;align-items:start}.hero-layout-2 .hero-caption strong{font-size:24px;letter-spacing:.025em}.hero-layout-2 .hero-caption p{margin-top:8px}.hero-layout-2 .hero-seal{display:none}.hero-layout-2 .registration-mount{position:relative}.hero-layout-3{grid-template-columns:1fr;gap:0;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;background:var(--surface)}.hero-layout-3 .hero-visual{display:grid;grid-template-columns:minmax(0,1fr) minmax(0,2.2fr);border:0;border-radius:0;height:155px;align-items:stretch}.hero-layout-3 .hero-image-frame{height:155px;order:2;background:#e7f0f7}.hero-layout-3 .hero-caption{border:0;background:var(--soft);padding:24px;order:1}.hero-layout-3 .hero-seal{display:none}.hero-layout-3 .hero-caption strong{font-size:23px;display:block;max-width:230px}.hero-layout-3 .registration-mount{border-top:1px solid var(--line)}.hero-layout-3 .registration-mount>.panel{border:0;border-radius:0}.hero-layout-1 .hero-visual{max-height:370px}
.information-grid{display:grid;grid-template-columns:1.9fr 1fr;gap:20px;margin-bottom:22px}.content-panel{padding:22px}.files-tabs{display:flex;border-bottom:1px solid var(--line);gap:24px}.files-tabs button{position:relative;border:0;background:none;padding:9px 1px;min-height:44px;color:var(--muted)}.files-tabs button[aria-selected="true"]{color:var(--brand);font-weight:600}.files-tabs button[aria-selected="true"]:after{content:"";position:absolute;bottom:-1px;left:0;right:0;height:2px;background:var(--brand)}.file-row{display:flex;width:100%;text-align:left;align-items:center;gap:15px;padding:17px 0;border:none;border-bottom:1px solid var(--line);background:none;min-height:91px}.file-row:last-child{border-bottom:0;padding-bottom:0}.file-mark{width:38px;height:44px;display:grid;place-items:center;border:1px solid var(--line);border-radius:5px;background:var(--soft);font-size:11px;flex:none;color:var(--brand)}.file-row strong{display:block;font-size:15px;font-weight:600;line-height:1.65}.file-row time{display:block;font-size:11px;color:var(--muted);margin-top:4px}.file-row>span:last-child{margin-left:auto;color:var(--muted)}.reading-side{display:grid;gap:18px;grid-template-rows:1fr 1fr}.empty-text{font-size:13px;color:var(--muted);padding:2px 0 12px}.learning-grid{display:grid;grid-template-columns:2.2fr 1fr;gap:20px}.course-list{display:grid;grid-template-columns:1fr 1fr;gap:16px}.course-card{display:flex;align-items:center;gap:14px;text-align:left;background:none;border:0;padding:0;min-height:80px}.course-card img{width:80px;height:64px;object-fit:cover;border-radius:6px}.course-card strong{font-size:14px;line-height:1.6;font-weight:600;display:block}.course-card small{font-size:11px;color:var(--muted);display:block;margin-top:4px}#site-footer{margin-top:30px;padding:25px 0 19px;border-top:1px solid var(--line);background:var(--soft)}.footer-top{display:flex;justify-content:space-between;gap:20px}.footer-top strong{font-size:14px}.footer-top p{color:var(--muted);font-size:12px;margin-top:5px}.footer-links{display:flex;gap:18px;font-size:12px}.footer-links a{text-decoration:underline;text-underline-offset:4px}.footer-bottom{margin-top:18px;padding-top:14px;border-top:1px solid var(--line);font-size:11px;color:var(--muted)}
.preview-dialog{width:min(610px,calc(100% - 32px));padding:30px;border:1px solid var(--line);border-radius:14px;color:var(--ink);background:var(--surface);box-shadow:0 22px 90px #19364d30}.preview-dialog::backdrop{background:#19364d55;backdrop-filter:blur(3px)}.preview-dialog h2{padding-right:25px;font-size:22px}.preview-dialog p{white-space:pre-line;margin:20px 0;line-height:1.9;color:var(--muted)}.preview-dialog small{display:block;font-size:12px;color:var(--muted);margin-bottom:22px}.preview-close{position:absolute;right:10px;top:10px;border:0;background:var(--soft);border-radius:50%;width:40px;height:40px;font-size:24px}.image-status{position:fixed;bottom:20px;left:50%;transform:translateX(-50%);z-index:80;background:var(--ink);color:white;padding:12px 18px;border-radius:8px;max-width:90vw}.image-status:empty{display:none}
body[data-palette="2"]{--brand:#184c78;--ink:#18324c;--muted:#596f83;--line:#d6e0e9;--soft:#edf3f8;--surface:#fefefe;--accent:#6586a1;--page:#f6f8fa}body[data-palette="3"]{--brand:#285660;--ink:#213f4b;--muted:#5c747a;--line:#d4e0e2;--soft:#edf4f3;--surface:#fff;--accent:#98866a;--page:#f3f6f5}body[data-palette="0"]{--brand:#0b5cad;--ink:#0b3558;--muted:#60758b;--line:#d4e1ed;--soft:#edf5fb;--accent:#0b5cad;--page:#f4f7fa}
body[data-effects="on"] .panel{box-shadow:var(--shadow);background:color-mix(in srgb,var(--surface) 96%,transparent)}body[data-effects="on"] #site-header{background:color-mix(in srgb,var(--surface) 95%,transparent)}body[data-effects="on"] .hero-layout-2 .registration-mount>.panel{box-shadow:0 10px 30px #1839530c}body[data-effects="on"] button{transition:background 180ms ease,border-color 180ms ease,box-shadow 180ms ease,transform 180ms ease}body[data-effects="on"] .site-nav button:hover,body[data-effects="on"] .file-row:hover{background:var(--soft)}body[data-effects="on"] .button:hover{box-shadow:0 4px 12px #19364d20;transform:translateY(-1px)}body[data-effects="on"] .course-card:hover strong{color:var(--brand);text-decoration:underline;text-underline-offset:4px}body[data-effects="off"] *{box-shadow:none!important;transition:none!important}body[data-effects="off"] button:hover{transform:none!important}
.comparison-main{padding-top:30px;padding-bottom:40px}.comparison-main h1{font-size:30px}.compare-lead{color:var(--muted);font-size:14px;margin-top:10px}.compare-tabs{display:flex;gap:7px;margin:22px 0 12px;border-bottom:1px solid var(--line);padding-bottom:12px}.compare-tabs a{padding:9px 16px;border-radius:6px;font-size:13px;min-height:44px}.compare-tabs a[aria-current]{background:var(--brand);color:white}.compare-options{display:flex;align-items:center;gap:18px;font-size:12px;margin-bottom:22px;color:var(--muted)}.compare-options select{font-size:12px;min-height:38px}.comparison-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:18px}.comparison-grid.is-wide{grid-template-columns:1fr;gap:28px}.compare-card{min-width:0}.compare-card-head{display:flex;align-items:center;justify-content:space-between;gap:12px;padding:14px 0}.compare-card-head h2{font-size:18px}.compare-card-head a{font-size:12px;white-space:nowrap;text-decoration:underline;text-underline-offset:4px}.compare-description{font-size:13px;line-height:1.8;color:var(--muted);margin:10px 0 0;min-height:50px}.compare-label{font-size:11px;color:var(--accent);letter-spacing:.1em;font-weight:700}.compare-demo{min-width:0}.comparison-grid:not(.is-wide) .compare-demo{container-type:inline-size}.comparison-grid.is-wide .compare-card{padding-bottom:25px;border-bottom:1px solid var(--line)}
@media(max-width:1100px){.brand-nav{height:auto;min-height:80px;flex-wrap:wrap;gap:5px;padding:12px 0 8px}.site-nav{width:100%;justify-content:space-between}.control-grid{grid-template-columns:repeat(3,minmax(0,1fr))}.hero-layout-1{grid-template-columns:minmax(0,1.3fr) minmax(0,1fr)}.site-brand strong{max-width:none}}
@media(max-width:760px){.container{width:calc(100% - 32px)}.workbar{padding:8px 12px;gap:8px}.workbrand span{display:none}.workbar>div{gap:10px}.workbar a,.workbar button{font-size:11px}.control-intro{display:block}.control-intro .text-button{min-height:32px}.control-grid{grid-template-columns:1fr 1fr;gap:10px}.control-bottom{gap:10px 14px}.control-bottom>a{margin-left:0}.brand-nav{min-height:72px;flex-wrap:nowrap;padding:12px 0;position:relative}.site-brand{gap:8px}.site-brand strong{font-size:14px;max-width:240px}.site-brand img{width:33px;height:33px}.mobile-nav-toggle{display:block;background:var(--surface);border:1px solid var(--line);border-radius:6px;min-width:40px;min-height:44px;font-size:22px}.site-nav{display:none}.site-nav.is-open{display:grid;grid-template-columns:repeat(3,1fr);gap:5px;position:absolute;top:100%;left:-16px;right:-16px;width:auto;padding:10px 16px;background:white;border-bottom:1px solid var(--line);z-index:30}.site-nav button{font-size:13px;padding:7px}.page-intro{padding:20px 0 16px}h1{font-size:23px}.eyebrow{font-size:11px}.page-intro .text-button{font-size:12px}.hero-composition,.hero-layout-1,.hero-layout-2{grid-template-columns:1fr;gap:14px}.hero-layout-1 .hero-visual{height:220px}.hero-image-frame{height:150px}.hero-caption{padding:12px 15px}.hero-caption strong{font-size:18px}.hero-caption p{font-size:11px}.hero-layout-2{padding:14px}.hero-layout-2 .hero-image-frame{height:160px}.hero-layout-2 .hero-caption strong{font-size:21px}.hero-layout-3 .hero-visual{grid-template-columns:1fr;height:auto}.hero-layout-3 .hero-caption{padding:13px 16px}.hero-layout-3 .hero-caption strong{font-size:19px;max-width:none}.hero-layout-3 .hero-image-frame{height:130px}.hero-layout-3{gap:0}.information-grid,.learning-grid{grid-template-columns:1fr;gap:18px}.content-panel{padding:18px}.reading-side{grid-template-columns:1fr 1fr;grid-template-rows:auto;gap:14px}.reading-side h2{font-size:19px}.reading-side .section-head{display:block}.reading-side .text-button{min-height:34px}.empty-text{font-size:12px}.section-head h2{font-size:21px}.course-list{grid-template-columns:1fr;gap:16px}.footer-top{display:block}.footer-links{margin-top:14px}.footer-bottom{font-size:11px}.comparison-grid{grid-template-columns:1fr;gap:24px}.compare-tabs{display:grid;grid-template-columns:1fr 1fr;gap:4px}.compare-tabs a{padding:9px 8px;text-align:center}.compare-options{display:block}.compare-options span{display:block;margin-top:8px}.comparison-main h1{font-size:25px}.compare-card-head h2{font-size:18px}}
.registration-mount>.reg-module{height:100%}.hero-layout-3 .registration-mount>.reg-module{border:0;border-radius:0}.flow-module{border:1px solid var(--line);border-radius:var(--radius);background:var(--surface)}body[data-effects="on"] .reg-module,body[data-effects="on"] .flow-module{background:color-mix(in srgb,var(--surface) 96%,transparent);box-shadow:var(--shadow)}body[data-effects="on"] .hero-layout-2 .reg-module{background:color-mix(in srgb,var(--surface) 92%,transparent);box-shadow:0 10px 30px #1839530c}
.hero-caption strong span{display:inline-block}body[data-effects="off"] .topic-arrow{transform:none!important}body[data-effects="on"] .topic-card:hover{transform:translateY(-2px);box-shadow:0 6px 18px #1839530c}body[data-effects="on"] .site-nav button:hover{color:var(--brand);box-shadow:inset 0 -2px var(--brand)}
@media(min-width:761px){.hero-layout-1 .hero-visual{height:330px;max-height:330px}.hero-layout-2 .hero-visual{height:320px}}
@media(max-width:760px){.hero-layout-2 .hero-visual{height:240px}}
@media(prefers-reduced-motion:reduce){html{scroll-behavior:auto}*,*:before,*:after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}