:root{font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","Microsoft YaHei",Arial,sans-serif;color:#101d3e;background:#fff;font-synthesis:none;text-rendering:optimizeLegibility;-webkit-font-smoothing:antialiased;--blue:#0964e8;--navy:#111d3f;--muted:#6f819e;--line:#dce5f0}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{margin:0;min-width:320px;min-height:100vh;display:flex;flex-direction:column;background:#fff}
body.modal-open{overflow:hidden}
main{flex:1}
button,input{font:inherit}
button{cursor:pointer}
img{display:block;max-width:100%}
[hidden]{display:none!important}
.site-shell{width:min(976px,calc(100% - 48px));margin:0 auto}
.site-header{height:67px;background:#fff;border-bottom:1px solid #e3e9f1;position:relative;z-index:5}
.nav-row{height:100%;width:min(1200px,calc(100% - 144px));display:flex;align-items:center;margin:0 auto}
.brand{width:174px;flex:none;display:flex;align-items:center;text-decoration:none}
.brand-logo{width:178px;height:73px;object-fit:contain;object-position:center}
.main-nav{height:100%;display:flex;align-items:stretch;gap:39px;margin-left:38px}
.nav-link{display:flex;align-items:center;position:relative;text-decoration:none;color:#16213e;font-size:15px;font-weight:600;white-space:nowrap}
.nav-link:hover,.nav-link.selected{color:var(--blue)}
.nav-link.selected:after{content:"";position:absolute;left:0;right:0;bottom:7px;height:3px;background:var(--blue)}
.invoice-promo{margin-left:auto;padding-left:17px;border-left:1px solid #dce5f0;display:flex;align-items:center;gap:9px;color:var(--blue);font-size:14px;font-weight:700;white-space:nowrap}
.invoice-promo:before{content:"";width:7px;height:7px;flex:none;border-radius:50%;background:var(--blue);box-shadow:0 0 0 4px #eaf3ff}
.home-hero,.faq-hero{height:294px;position:relative;overflow:hidden;background:#edf6ff url("/images/hero-home-background.png") center top/cover no-repeat}
.hero-image{position:absolute;z-index:0;top:0;right:0;width:min(45.9vw,552px);height:auto;aspect-ratio:477/254;border-radius:0;background-size:100% 100%;background-position:center;box-shadow:none;-webkit-mask-image:linear-gradient(to right,transparent 0%,#000 22%,#000 100%);mask-image:linear-gradient(to right,transparent 0%,#000 22%,#000 100%)}
.hero-content,.faq-hero-content{height:100%;position:relative;z-index:1;padding-top:62px}
.home-hero .site-shell,.faq-hero .site-shell{width:min(1160px,calc(100% - 144px))}
.hero-content h1,.faq-hero-content h1{margin:0;color:var(--navy);font-size:43px;line-height:1.24;font-weight:800;letter-spacing:.01em}
.hero-content p,.faq-hero-content>p{margin:8px 0 18px;color:#5f7396;font-size:20px;line-height:1.5;letter-spacing:.01em}
.hero-search{display:flex;align-items:center;gap:11px;width:480px;height:49px;padding:0 17px;border:1px solid #c9ddf5;border-radius:28px;background:rgba(255,255,255,.92);box-shadow:0 4px 15px #174b8510}
.hero-search>img{width:22px;height:22px;object-fit:contain}
.hero-search input{width:100%;min-width:0;border:0;outline:0;background:transparent;color:#344967;font-size:15px}
.hero-search input::placeholder{color:#71809b;opacity:1}
.category-shortcuts{width:min(1140px,calc(100% - 80px));display:grid;grid-template-columns:repeat(auto-fit,minmax(min(100%,170px),1fr));justify-content:center;gap:8px;position:relative;z-index:2;margin-top:-39px}
.category-shortcut{height:74px;display:flex;align-items:center;justify-content:center;gap:6px;padding:0 8px;border-radius:10px;background:#f2f8ff;text-decoration:none;color:var(--navy)}
.category-shortcut>img{width:36px;height:36px;flex:none}
.shortcut-copy{display:flex;flex-direction:column;gap:4px;min-width:0}
.shortcut-copy strong{font-size:14px;font-weight:700;white-space:nowrap}
.shortcut-copy small{font-size:11px;color:#70809b;white-space:nowrap}
.shortcut-arrow{width:22px;height:22px;flex:none;border-radius:50%;display:grid;place-items:center;background:#e3f0ff;font-size:16px;line-height:1}
.shortcut-arrow img{width:16px;height:16px;transform:rotate(-90deg)}
.home-library{width:min(1200px,calc(100% - 112px));padding-top:33px;padding-bottom:42px}
.home-section+.home-section{margin-top:52px}
.home-section-heading{min-height:48px;display:flex;align-items:center;justify-content:space-between;padding-left:20px;position:relative}
.home-section-heading:before{content:"";position:absolute;left:0;top:3px;width:8px;height:28px;border-radius:5px;background:#0870f5}
.home-section-heading h2{margin:0;font-size:25px;line-height:1.24;font-weight:750;color:var(--navy)}
.home-section-heading p{margin:2px 0 0;color:#72819a;font-size:14px;line-height:1.35}
.home-section-heading>a{align-self:flex-start;margin-top:10px;color:var(--blue);font-size:14px;text-decoration:none;white-space:nowrap}
.home-section-heading>a span{font-weight:700}
.home-section-heading>a b{padding-left:7px;font-size:18px;font-weight:500}
.home-course-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;margin-top:18px}
.home-course{min-width:0;overflow:hidden;border:1px solid #e4ebf4;border-radius:12px;background:#fff;box-shadow:0 2px 8px #18365b08;transition:transform .22s ease,box-shadow .22s ease,border-color .22s ease}
.home-course-thumb{width:100%;height:auto;aspect-ratio:298/161;position:relative;display:block;overflow:hidden;padding:0;border:0;border-radius:0;background:#edf3f8;text-align:left}
.home-course-thumb>img{width:100%;height:100%;object-fit:cover}
.thumb-play{position:absolute;left:50%;top:50%;width:46px;height:46px;display:grid;place-items:center;border-radius:50%;transform:translate(-50%,-50%);background:rgba(30,39,53,.63)}
.thumb-play img{width:21px;height:21px;object-fit:contain}
.thumb-duration{position:absolute;right:6px;bottom:6px;padding:3px 5px;border-radius:4px;background:#14202dd9;color:#fff;font-size:13px;line-height:1.2}
.home-course h3{margin:0;padding:14px 15px 7px;color:#111d37;font-size:16px;line-height:1.4;font-weight:700;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.course-plays{display:flex;align-items:center;gap:5px;padding:0 15px 14px;color:#73829d;font-size:14px;line-height:1.3}
.course-plays img{width:18px;height:18px;object-fit:contain;filter:grayscale(1);opacity:.63}
.course-plays span{white-space:nowrap}
.home-course-thumb>img{transition:transform .28s ease}
.share-button{display:inline-flex;align-items:center;justify-content:center;gap:5px;border:0;border-radius:6px;padding:5px 7px;background:transparent;color:#71819b;font-size:13px;line-height:1.2;white-space:nowrap}
.share-button img{width:16px;height:16px;object-fit:contain;filter:none;opacity:1}
.card-share{margin-left:auto}
.modal-share-button{margin-left:auto;padding:7px 10px;background:#f1f5fa;color:#52637f}
@media(hover:hover) and (prefers-reduced-motion:no-preference){
  .category-shortcut{transition:transform .2s ease,box-shadow .2s ease}
  .category-shortcut .shortcut-arrow{transition:transform .2s ease}
  .category-shortcut:hover{transform:translateY(-4px);box-shadow:0 10px 22px #1539661c}
  .category-shortcut:hover .shortcut-arrow{transform:translateX(3px)}
  .home-course:hover{transform:translateY(-3px);border-color:#c9ddf5;box-shadow:0 12px 28px #10244818}
  .home-course:hover .home-course-thumb>img{transform:scale(1.035)}
  .home-course:hover .thumb-play{transform:translate(-50%,-50%) scale(1.08)}
  .home-course:hover h3{color:var(--blue)}
  .share-button:hover{background:#eaf3ff;color:var(--blue)}
}
.section-empty,.category-empty{grid-column:1/-1;min-height:220px;margin:0;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;color:#91a0b7;font-size:16px;text-align:center}
.empty-illustration{width:108px;height:108px;object-fit:contain}
.search-empty{min-height:260px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;color:#91a0b7;text-align:center}
.category-page{width:min(1200px,calc(100% - 48px));padding-top:24px;padding-bottom:32px}
.tutorial-toolbar,.faq-toolbar{display:flex;align-items:center;justify-content:space-between;gap:14px}
.tutorial-toolbar{margin:22px 19px 0}
.list-search{width:330px;height:42px;flex:0 0 330px;display:flex;align-items:center;gap:9px;padding:3px 4px 3px 14px;border:1px solid #c9ddf5;border-radius:24px;background:#fff;overflow:hidden}
.list-search>img{width:18px;height:18px;flex:none;object-fit:contain}
.list-search input{height:100%;min-width:0;flex:1;border:0;outline:0;background:transparent;color:#344967;font-size:14px}
.list-search input::placeholder{color:#8291a9;opacity:1}
.list-search button{height:34px;min-width:62px;flex:none;border:0;border-radius:18px;background:#0962e8;color:#fff;font-size:13px;font-weight:600}
.category-filters{display:flex;flex-wrap:wrap;gap:9px;margin:0}
.category-filters a{height:38px;min-width:112px;padding:0 15px;border-radius:7px;background:#f0f4f9;color:#52637f;display:flex;align-items:center;justify-content:center;text-decoration:none;font-size:14px;font-weight:600}
.category-filters a.selected{background:#0962e8;color:white}
.category-course-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:22px;margin:24px 0 0}
.load-more{min-height:42px;padding:12px;text-align:center;color:#8291a9;font-size:13px}
.site-footer{min-height:108px;background:#f2f7fc}
.footer-row{width:min(1200px,calc(100% - 84px));min-height:108px;display:flex;align-items:center;justify-content:space-between}
.footer-company{display:flex;align-items:center;gap:20px;min-width:0}
.footer-logo{width:174px;height:62px;object-fit:contain;object-position:center;flex:none}
.footer-divider{height:52px;border-left:1px solid #c8d3e2}
.footer-company-copy{display:flex;flex-direction:column;gap:3px;min-width:0}
.footer-company-copy strong{color:#152341;font-size:14px;line-height:1.35}
.footer-company-copy span{color:#74839e;font-size:12px;line-height:1.35;white-space:nowrap}
.footer-right{height:62px;display:flex;align-items:center;gap:28px}
.footer-record{height:62px;display:flex;flex-direction:column;justify-content:center;gap:5px;color:#6b7e9d;font-size:13px;white-space:nowrap}
.footer-record a{color:inherit;text-decoration:none}
.footer-record a:hover{text-decoration:underline;color:var(--blue)}
.back-to-top{position:fixed;right:26px;bottom:calc(112px + env(safe-area-inset-bottom));z-index:10;width:44px;height:44px;display:grid;place-items:center;border:0;border-radius:50%;background:#0964e8;box-shadow:0 5px 18px #0b4b9c38;transition:opacity .18s ease,transform .18s ease,background .18s ease}
.back-to-top[hidden]{display:none}
.back-to-top img{width:18px;height:18px;transform:rotate(180deg);filter:brightness(0) invert(1)}
.back-to-top:hover{transform:translateY(-3px);background:#0757ca}
.back-to-top:focus-visible{outline:3px solid #9dc5ff;outline-offset:3px}
.faq-hero{height:210px}
.faq-hero-content{padding-top:62px}
.faq-main{padding-top:12px;padding-bottom:54px;width:min(1100px,calc(100% - 96px))}
.faq-toolbar{margin-bottom:22px}
.faq-filters{display:flex;gap:9px;margin:0}
.faq-filters button{height:39px;min-width:104px;padding:0 15px;border:0;border-radius:8px;background:#f0f5fb;color:#4e6080;font-size:14px;font-weight:600;white-space:nowrap}
.faq-filters button.selected{background:#0962e8;color:#fff}
.faq-list{display:flex;flex-direction:column;gap:12px}
.faq-item{border:1px solid #e0e8f2;border-radius:11px;background:#fff;overflow:hidden}
.faq-item.open{border-color:#c7ddff;background:#f4f8ff}
.faq-question{width:100%;min-height:70px;padding:13px 18px;display:flex;align-items:center;gap:15px;border:0;background:transparent;text-align:left}
.faq-icon-badge{width:38px;height:38px;flex:none;border-radius:50%;display:grid;place-items:center;background:#1674f5}
.faq-icon-badge.violet{background:#8250f5}
.faq-icon-badge.green{background:#25bd96}
.faq-icon-badge.orange{background:#f79a2e}
.faq-item-icon{width:21px;height:21px;max-width:none;object-fit:contain;filter:brightness(0) invert(1)}
.faq-question strong{flex:1;color:#12203d;font-size:17px;line-height:1.4;font-weight:700}
.faq-chevron{width:19px;height:19px;flex:none;transform:rotate(0deg);transition:transform .18s}
.faq-item.open .faq-chevron{transform:rotate(180deg)}
.faq-answer{margin:0 17px 17px;padding:14px 19px;border-radius:9px;background:rgba(255,255,255,.75)}
.faq-answer p{margin:0;color:#566b90;font-size:14px;line-height:1.65}
.faq-empty{min-height:260px;box-sizing:border-box;padding:32px 16px;display:flex;flex-direction:column;align-items:center;justify-content:center;gap:12px;color:#7787a0;text-align:center}
.faq-empty .empty-illustration{width:48px;height:48px}
.faq-more{margin:38px 0 0;text-align:center;color:#647797;font-size:16px}
.faq-more a{display:inline-flex;align-items:center;gap:10px;color:var(--blue);text-decoration:none;font-weight:600}
.faq-more img{width:17px;height:17px;transform:rotate(-90deg)}
.video-modal[hidden]{display:none!important}
.video-modal{position:fixed;inset:0;z-index:20;display:grid;place-items:center;padding:25px}
.modal-scrim{position:absolute;inset:0;border:0;background:rgba(15,28,49,.57)}
.video-dialog{position:relative;width:min(820px,calc(100vw - 48px));max-height:calc(100vh - 48px);overflow:auto;padding:42px 22px 20px;border-radius:12px;background:#fff;box-shadow:0 18px 65px #0a1b3445}
.modal-close{position:absolute;right:16px;top:10px;width:28px;height:28px;display:grid;place-items:center;border:0;background:transparent;z-index:2}
.modal-close img{width:17px;height:17px}
.video-js{position:relative!important;width:100%!important;height:auto!important;aspect-ratio:16/9;padding-top:0!important;background:#10151d;border-radius:8px;overflow:hidden}
.video-js .vjs-tech{width:100%;height:100%;object-fit:contain}
.video-js .vjs-big-play-button{left:50%;top:50%;width:62px;height:62px;border:0;border-radius:50%;margin:-31px 0 0 -31px;background:rgba(24,35,53,.66);font-size:35px;line-height:62px}
.video-js .vjs-control-bar{background:linear-gradient(transparent,rgba(8,15,23,.88))}
.video-js .vjs-volume-panel.vjs-volume-panel-vertical{width:3em}
.video-js .vjs-volume-panel.vjs-volume-panel-vertical .vjs-volume-control.vjs-volume-vertical{height:7em;bottom:8em}
.video-js .vjs-web-fullscreen-control .vjs-icon-placeholder,
.video-js .vjs-fullscreen-control .vjs-icon-placeholder{position:relative;display:block;width:100%;height:100%}
.video-js .vjs-web-fullscreen-control .vjs-icon-placeholder:before,
.video-js .vjs-fullscreen-control .vjs-icon-placeholder:before{content:"";position:absolute;inset:0;background-position:center;background-repeat:no-repeat;background-size:18px 18px}
.video-js .vjs-web-fullscreen-control .vjs-icon-placeholder:before{background-image:url("/images/icons/player/web-fullscreen.png")}
.video-js .vjs-fullscreen-control .vjs-icon-placeholder:before{background-image:url("/images/icons/player/screen-fullscreen.png")}
.video-js .vjs-web-fullscreen-control .vjs-control-text,
.video-js .vjs-fullscreen-control .vjs-control-text{clip:rect(0 0 0 0)}
.video-js .vjs-button{position:relative}
.video-js .vjs-button>.vjs-control-text{position:absolute;left:50%;bottom:calc(100% + 8px);z-index:30;width:max-content;height:auto;overflow:visible;padding:6px 8px;clip:auto;transform:translateX(-50%);border-radius:4px;background:rgba(25,32,42,.94);box-shadow:0 2px 8px rgba(0,0,0,.25);color:#fff;font-size:12px;line-height:1.2;white-space:nowrap;opacity:0;pointer-events:none;transition:opacity .1s ease}
.video-js .vjs-button:hover>.vjs-control-text,
.video-js .vjs-button:focus-visible>.vjs-control-text{opacity:1}
.video-modal.web-fullscreen{padding:0}
.video-modal.web-fullscreen .video-dialog{display:flex;flex-direction:column;justify-content:center;align-items:center;gap:17px;width:100vw!important;height:100vh;height:100dvh;max-height:none;overflow:auto;padding:45px 4vw 22px;border-radius:0}
.video-modal.web-fullscreen .video-js,
.video-modal.web-fullscreen .video-unavailable{flex:none;width:min(100%,calc((100dvh - 190px)*16/9));max-height:calc(100dvh - 190px);margin:auto;aspect-ratio:16/9}
.video-modal.web-fullscreen .video-dialog-copy{width:min(100%,calc((100dvh - 190px)*16/9))}
.video-modal.web-fullscreen .video-dialog-copy h2{margin:0 0 10px}
.video-dialog-copy h2{margin:19px 0 13px;color:#101d3c;font-size:23px;line-height:1.35;font-weight:750}
.video-dialog-meta{display:flex;align-items:center;gap:19px;color:#70809b;font-size:15px}
.video-dialog-meta>span{display:flex;align-items:center;gap:7px;white-space:nowrap}
.video-dialog-meta>span:first-child{padding:7px 11px;border-radius:6px;background:#e9f2ff;color:#0a67e9}
.video-dialog-meta img{width:19px;height:19px;object-fit:contain;opacity:.7}
.video-dialog-meta b{font-weight:500}
.video-unavailable{aspect-ratio:16/9;min-height:0;display:grid;place-items:center;background:#10151d;color:#e9eef6;text-align:center}
.share-modal[hidden]{display:none!important}
.share-modal{position:fixed;inset:0;z-index:30;display:grid;place-items:center;padding:max(12px,env(safe-area-inset-top)) 12px max(12px,env(safe-area-inset-bottom))}
.share-scrim{position:absolute;inset:0;border:0;background:rgba(15,28,49,.57)}
.share-dialog{position:relative;width:min(430px,calc(100dvw - 24px));max-height:calc(100vh - 24px - env(safe-area-inset-top) - env(safe-area-inset-bottom));max-height:calc(100dvh - 24px - env(safe-area-inset-top) - env(safe-area-inset-bottom));overflow:auto;padding:30px 28px 22px;border-radius:14px;background:#fff;box-shadow:0 18px 65px #0a1b3445;text-align:center}
.share-close{position:absolute;right:14px;top:12px;width:30px;height:30px;display:grid;place-items:center;border:0;background:transparent}
.share-close img{width:17px;height:17px}
.share-dialog h2{margin:2px 0 7px;color:var(--navy);font-size:21px;line-height:1.35}
.share-course-title{margin:0 22px 18px;color:#71819b;font-size:14px;line-height:1.5}
.share-qrcode-wrap{width:202px;height:202px;margin:0 auto;display:grid;place-items:center;border:1px solid #e4eaf2;border-radius:12px;background:#fff}
.share-qrcode{width:184px;height:184px;object-fit:contain}
.share-hint{margin:13px 0;color:#71819b;font-size:13px}
.share-link-row{display:flex;gap:8px;align-items:center}
.share-link-row input{height:40px;min-width:0;flex:1;padding:0 10px;border:1px solid #dbe4ef;border-radius:7px;color:#50617c;font-size:12px;outline:none}
.share-link-row input:focus{border-color:#8eb9f3}
.share-link-row button{height:40px;flex:none;padding:0 13px;border:0;border-radius:7px;background:var(--blue);color:#fff;font-size:13px;font-weight:600}
.share-feedback{min-height:18px;margin:10px 0 0;color:#20a47f;font-size:12px}
.share-feedback.copy-failed{color:#c77b24}
@media(max-width:850px){
  .main-nav{margin-left:38px;gap:26px}
  .tutorial-toolbar,.faq-toolbar{flex-wrap:wrap}
  .category-filters,.faq-filters{width:100%;flex-wrap:nowrap;overflow-x:auto;padding-bottom:2px}
  .list-search{margin-left:auto}
  .category-shortcuts{width:min(780px,calc(100% - 48px));grid-template-columns:repeat(3,minmax(0,1fr))}
  .home-course-grid,.category-course-grid{grid-template-columns:repeat(2,minmax(0,1fr))}
  .category-filters{gap:10px}
  .category-filters a{min-width:max-content;padding:0 14px;font-size:14px}
  .footer-company{gap:13px}
  .footer-logo{width:145px}
  .footer-right{gap:17px}
  .footer-record{font-size:11px}
}
@media(max-width:600px){
  .site-shell{width:calc(100% - 30px)}
  .site-header{height:65px}
  .nav-row,.faq-body .nav-row{width:calc(100% - 24px)}
  .brand,.faq-body .brand{width:80px}
  .brand-logo,.faq-body .brand-logo{width:80px;height:49px}
  .main-nav,.faq-body .main-nav{margin-left:auto;gap:15px}
  .nav-link{font-size:12px}
  .nav-link.selected:after{bottom:6px;height:2px}
  .site-header{height:91px}
  .nav-row{height:65px}
  .invoice-promo{position:absolute;right:15px;bottom:7px;margin:0;padding:0;border:0;font-size:11px;gap:7px}
  .invoice-promo:before{width:5px;height:5px;box-shadow:0 0 0 3px #eaf3ff}
  .home-hero .site-shell,.faq-hero .site-shell,.category-shortcuts,.home-library,.category-page,.faq-main,.footer-row{width:calc(100% - 30px)}
  .home-hero,.faq-hero{height:270px;background-size:auto 100%;background-position:left center}
  .home-hero{height:270px}
  .hero-image{display:none}
  .hero-content,.faq-hero-content{padding-top:43px}
  .hero-content h1,.faq-hero-content h1{font-size:29px}
  .hero-content p,.faq-hero-content>p{max-width:300px;font-size:15px;line-height:1.5}
  .hero-search{width:100%;height:45px}
  .hero-search input{font-size:13px}
  .category-shortcuts{width:calc(100% - 24px);grid-template-columns:1fr;gap:8px;margin-top:-29px}
  .category-shortcut{height:68px;padding:0 13px;gap:12px}
  .category-shortcut>img{width:42px;height:42px}
  .shortcut-copy{gap:2px}
  .shortcut-copy strong{font-size:15px}
  .shortcut-copy small{font-size:11px}
  .shortcut-arrow{width:28px;height:28px}
  .home-library{width:calc(100% - 30px);padding-top:28px}
  .home-section+.home-section{margin-top:30px}
  .home-section-heading{padding-left:14px;min-height:41px}
  .home-section-heading:before{width:6px;height:24px}
  .home-section-heading h2{font-size:19px}
  .home-section-heading p{max-width:235px;font-size:10px}
  .home-section-heading>a{margin-top:7px;font-size:10px}
  .home-section-heading>a b{font-size:14px}
  .home-course-grid{grid-template-columns:1fr;gap:16px;margin-top:12px}
  .home-course-thumb{aspect-ratio:1.58}
  .thumb-play{width:35px;height:35px}
  .thumb-play img{width:17px;height:17px}
  .thumb-duration{font-size:10px}
  .home-course h3{padding:9px 10px 4px;font-size:12px}
  .course-plays{padding:0 10px 10px;font-size:10px;gap:3px}
  .course-plays img{width:14px;height:14px}
  .category-page{padding-top:18px;padding-bottom:28px}
  .tutorial-toolbar{gap:10px;margin:16px 0 0}
  .category-filters{gap:7px}
  .category-filters a{height:36px;padding:0 7px;font-size:12px;border-radius:7px}
  .list-search{width:100%;height:40px;flex:0 0 100%;padding-left:12px}
  .list-search>img{width:17px;height:17px}
  .list-search input{font-size:13px}
  .list-search button{height:32px;min-width:58px;font-size:12px}
  .category-course-grid{grid-template-columns:1fr;gap:16px;margin:18px 0 0}
  .site-footer,.category-page+.site-footer,.faq-body .site-footer{min-height:unset}
  .footer-row,.category-page+.site-footer .footer-row,.faq-body .footer-row{min-height:unset;align-items:flex-start;flex-direction:column;gap:12px;padding-top:17px;padding-bottom:17px}
  .footer-company{gap:8px;flex-wrap:nowrap}
  .footer-logo{width:95px;height:43px}
  .footer-divider{height:37px}
  .footer-company-copy{gap:3px;flex:1}
  .footer-company-copy strong{font-size:11px}
  .footer-company-copy span{font-size:9px;white-space:normal}
  .footer-right{height:auto;width:100%;justify-content:flex-end;gap:8px}
  .footer-record{height:auto;font-size:9px}
  .back-to-top{right:15px;bottom:calc(142px + env(safe-area-inset-bottom));width:40px;height:40px}
  .back-to-top img{width:16px;height:16px}
  .faq-hero{height:190px}
  .faq-hero-content{padding-top:40px}
  .faq-main{width:calc(100% - 30px);padding-top:14px;padding-bottom:42px}
  .faq-toolbar{gap:10px;margin-bottom:18px}
  .faq-filters{gap:7px}
  .faq-filters button{height:36px;min-width:max-content;padding:0 12px;border-radius:8px;font-size:12px}
  .faq-list{gap:10px}
  .faq-item{border-radius:8px}
  .faq-question{min-height:66px;padding:11px 12px;gap:11px}
  .faq-icon-badge{width:35px;height:35px}
  .faq-item-icon{width:19px;height:19px}
  .faq-question strong{font-size:13px}
  .faq-chevron{width:15px;height:15px}
  .faq-answer{margin:0 11px 11px;padding:12px 14px;border-radius:7px}
  .faq-answer p{font-size:11px}
  .faq-more{margin-top:24px;font-size:12px}
  .video-modal{padding:12px}
  .video-dialog{width:calc(100vw - 24px);max-height:calc(100vh - 24px);padding:37px 12px 13px;border-radius:9px}
  .video-js .vjs-web-fullscreen-control{display:none}
  .video-js .vjs-volume-panel.vjs-volume-panel-vertical{width:3em}
  .video-js .vjs-volume-panel.vjs-volume-panel-vertical .vjs-volume-control.vjs-volume-vertical{height:6em;bottom:8em}
  .video-js .vjs-fullscreen-control{display:block}
  .video-dialog-copy h2{margin:12px 0 9px;font-size:16px}
  .video-dialog-meta{gap:9px;font-size:10px;flex-wrap:wrap}
  .video-dialog-meta>span:first-child{padding:5px 7px}
  .video-dialog-meta img{width:14px;height:14px}
  .share-button{gap:3px;padding:4px 5px;font-size:11px}
  .share-button img{width:14px;height:14px}
  .share-dialog{padding:29px 16px 19px;border-radius:11px}
  .share-dialog h2{font-size:18px}
  .share-course-title{margin-bottom:14px;font-size:13px}
  .share-qrcode-wrap{width:190px;height:190px}
  .share-qrcode{width:174px;height:174px}
  .share-link-row{gap:6px}
  .share-link-row input{font-size:16px}
  .share-link-row button{padding:0 10px;font-size:12px}
  .video-modal.web-fullscreen .video-dialog{gap:10px;padding:38px 12px 12px}
  .video-modal.web-fullscreen .video-js,
  .video-modal.web-fullscreen .video-unavailable{width:100%;max-height:calc(100dvh - 140px)}
  .video-modal.web-fullscreen .video-dialog-copy{width:100%}
}
@media(prefers-reduced-motion:reduce){
  html{scroll-behavior:auto}
  .back-to-top{transition:none}
}