:root{--paper:#f8f7f3;--ink:#203245;--muted:#65717b;--blue:#126ab5;--line:#dddeda}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:"Microsoft YaHei","PingFang SC",sans-serif;font-size:14px;line-height:1.65}a{color:var(--blue);text-underline-offset:4px}button,input,select{font:inherit}button,a,input,select{-webkit-tap-highlight-color:transparent}button{cursor:pointer}button:disabled{cursor:default;opacity:.6}[hidden]{display:none!important}.demo-banner{text-align:center;background:#fff0ce;color:#78531b;font-size:12px;padding:8px 16px}.topbar{height:78px;display:flex;align-items:center;justify-content:space-between;padding:0 6vw}.wordmark{font-size:27px;font-weight:900;letter-spacing:-1.3px;color:var(--ink);text-decoration:none}.wordmark span{color:var(--blue)}.wordmark small{font-size:12px;font-weight:400;letter-spacing:2px;border-left:1px solid #aaa;margin-left:18px;padding-left:18px}.topbar nav{display:flex;gap:30px}.topbar nav a{font-size:13px;color:var(--muted);text-decoration:none}.topbar nav a[aria-current=page]{color:var(--blue)}.hero{position:relative;width:100%;overflow:hidden;background:#e9f3f7;animation:appear .7s ease-out}.hero img{display:block;width:100%;height:clamp(300px,34vw,530px);object-fit:cover;object-position:center 46%}.hero-note{display:flex;align-items:center;justify-content:space-between;background:#eaf3f8;color:#37566d;padding:12px 6vw;font-size:13px;letter-spacing:2px}.hero-note span{font-size:10px;letter-spacing:3px}.enrollment{display:grid;grid-template-columns:.8fr 1.2fr;gap:9vw;max-width:1180px;margin:0 auto;padding:76px 32px 80px}.course-copy{align-self:start;position:sticky;top:32px}.eyebrow{font-size:10px;color:var(--blue);letter-spacing:2px;font-weight:700;margin:0 0 16px}h1{font-size:56px;letter-spacing:-2px;line-height:1.13;margin:0 0 24px}h1 span{font-size:36px;letter-spacing:0;font-weight:500}.intro{font-size:16px;line-height:1.9}.course-detail{margin:32px 0 22px;border-top:1px solid var(--line);padding-top:22px;display:grid;grid-template-columns:1fr 1.4fr;gap:14px;font-size:13px}.course-detail>span{color:var(--muted)}.small{font-size:12px}.muted{color:var(--muted)}.text-link{display:inline-block;margin-top:12px;font-size:12px}.steps{display:flex;justify-content:space-between;gap:10px;list-style:none;padding:0 0 22px;margin:0 0 32px;border-bottom:1px solid var(--line);font-size:12px;color:var(--muted)}.steps b{font-size:10px;margin-right:6px}.steps .active{color:var(--blue);font-weight:bold}h2{font-size:21px;margin:0 0 7px;font-weight:600}form>p.muted{font-size:12px;margin:0 0 26px}label{display:block;font-size:13px;margin:20px 0 8px;font-weight:500}em,.optional{font-size:10px;color:var(--muted);font-style:normal;margin-left:5px;font-weight:400}input:not([type=checkbox]),select{display:block;width:100%;min-width:0;height:48px;border:1px solid #d4dadc;border-radius:8px;background:#fff;padding:0 13px;color:var(--ink);outline:none;transition:border-color .2s,box-shadow .2s}input::placeholder{color:#88929a;font-size:12px}input:focus,select:focus{border-color:var(--blue);box-shadow:0 0 0 3px #126ab518}button:focus-visible,a:focus-visible{outline:3px solid #e99a19;outline-offset:4px}.two-col{display:grid;grid-template-columns:1fr 1fr;gap:18px}.code-row{display:flex;gap:10px}.code-row input{flex:1;width:80px}.secondary{border:1px solid #cbd4da;background:transparent;border-radius:8px;padding:11px 16px;color:var(--blue);white-space:nowrap;font-size:12px;transition:background .2s}.secondary:hover{background:#e9f1f7}.consent{display:flex;align-items:flex-start;gap:10px;font-size:11px;color:var(--muted);margin-top:25px}.consent input{accent-color:var(--blue);width:18px;height:18px;flex-shrink:0;margin:2px 0}.primary{display:flex;justify-content:center;align-items:center;gap:25px;width:100%;background:var(--blue);border:0;border-radius:9px;color:white;padding:15px 20px;font-weight:600;transition:background .2s,transform .2s}.primary:hover{background:#07589b;transform:translateY(-2px)}.primary:active{transform:translateY(0)}.footnote{text-align:center;font-size:11px;color:var(--muted);margin:12px 0 0}.error{color:#b04428;font-size:12px;min-height:18px}.privacy{border-top:1px solid var(--line);max-width:1116px;margin:0 auto;padding:30px 0 45px}.privacy h2{font-size:16px}.privacy p{font-size:12px;color:var(--muted);max-width:840px}footer{padding:28px 6vw;border-top:1px solid var(--line);display:flex;justify-content:space-between;align-items:center;color:var(--muted);font-size:11px}footer .wordmark{font-size:20px}#checkout,#result{animation:appear .3s ease-out;outline:none}.amount{font-size:42px;letter-spacing:-1px;font-weight:700;margin:18px 0 0}.amount small{font-size:13px;letter-spacing:0;font-weight:400}.notice{padding:12px 15px;background:#fff0ce;font-size:12px;color:#78531b;margin:20px 0;border-radius:6px}.order-data{margin:25px 0}.order-data>div{display:flex;gap:20px;justify-content:space-between;border-bottom:1px solid var(--line);padding:12px 0;font-size:13px}.order-data dt{color:var(--muted);flex-shrink:0}.order-data dd{margin:0;text-align:right;overflow-wrap:anywhere}.actions{display:grid;gap:12px}.success-symbol{font-size:30px;color:var(--blue);background:#e4eff7;border-radius:50%;width:65px;height:65px;display:grid;place-items:center;margin-bottom:24px}.admin{max-width:1280px;margin:auto;padding:60px 40px 90px;min-height:75vh}.admin-heading{display:flex;align-items:center;justify-content:space-between;gap:20px}.admin h1{font-size:34px;letter-spacing:-1px;margin-bottom:12px}.link-button{text-decoration:none;display:inline-block}.admin-notice{font-size:12px;color:#78531b;background:#fff0ce;padding:12px 18px;margin:25px 0}.summary{display:flex;gap:70px;padding:20px 0 30px;border-bottom:1px solid var(--line)}.summary span{display:block;font-size:12px;color:var(--muted)}.summary strong{font-size:34px;font-weight:500}.filters{display:flex;gap:20px;align-items:end;margin:12px 0 28px}.filters label:first-child{flex:1}.filters label{margin:14px 0 0}.filters input,.filters select{margin-top:8px}.table-scroll{overflow:auto}table{width:100%;border-collapse:collapse;text-align:left;font-size:13px;white-space:nowrap}th{font-size:11px;color:var(--muted);font-weight:500;padding:15px 16px;background:#eeefeb}td{padding:20px 16px;border-bottom:1px solid var(--line)}td small{display:block;color:var(--muted);font-size:11px}.badge{padding:5px 8px;font-size:11px;background:#eaedef;border-radius:4px}.badge.paid{background:#e3f0e7;color:#2d6a46}.badge.pending{background:#fff0ce;color:#78531b}.empty{text-align:center;color:var(--muted);padding:65px 10px}dialog{border:0;border-radius:16px;background:var(--paper);color:var(--ink);padding:30px;width:min(520px,calc(100% - 32px));max-height:85vh;overflow:auto}dialog::backdrop{background:#20324566}.dialog-top{display:flex;gap:15px;align-items:center;justify-content:space-between}.dialog-top h2{font-size:18px;margin:0}@keyframes appear{from{opacity:0;transform:translateY(10px)}to{opacity:1;transform:translateY(0)}}@media(min-width:1600px){.hero img{height:530px}}@media(max-width:760px){.topbar{height:64px;padding:0 20px}.wordmark{font-size:24px}.wordmark small{display:none}.topbar nav{gap:18px}.topbar nav a{font-size:11px}.demo-banner{font-size:10px;padding:7px 12px}.hero img{height:auto;aspect-ratio:16/10;object-fit:cover}.hero-note{padding:10px 20px;font-size:11px;letter-spacing:1px}.hero-note span{display:none}.enrollment{display:block;padding:32px 22px 40px}.course-copy{position:static}.eyebrow{margin-bottom:10px;font-size:9px}h1{font-size:36px;margin:0 0 14px;line-height:1.2}h1 br{display:none}h1 span{font-size:24px;margin-left:8px}.intro{font-size:13px;line-height:1.8}.intro br{display:none}.course-detail{margin:20px 0 14px;padding-top:16px;gap:9px}.course-copy .text-link{display:none}.course-copy>.small{font-size:11px}.form-area{margin-top:32px;border-top:1px solid var(--line);padding-top:24px}.steps{padding-bottom:16px;margin-bottom:24px;font-size:11px}h2{font-size:18px}.two-col{gap:12px}.privacy{margin:0 22px;padding:24px 0 30px}.code-row .secondary{padding:10px 12px}footer{padding:20px 22px;gap:15px}.admin{padding:32px 20px 50px}.admin-heading{display:block}.admin h1{font-size:28px}.summary{gap:24px;justify-content:space-between}.summary strong{font-size:26px}.summary span{font-size:10px}.filters{gap:12px}.filters label{font-size:11px}.filters label:last-child{width:126px}.filters input{font-size:12px}.admin-heading>.secondary{margin-top:8px}.admin-notice{font-size:11px}td,th{padding:14px 12px}}@media(prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important;scroll-behavior:auto!important}}
/* Mobile-first parent flow. Admin retains its separate, responsive workspace. */
body{background:#f1f3f5;-webkit-text-size-adjust:100%}
.demo-banner{padding:5px 12px;font-size:11px;line-height:20px}
#parent-view{max-width:480px;margin:auto;background:#fff;min-height:calc(100svh - 30px);padding-bottom:env(safe-area-inset-bottom)}
.hero{animation:appear .35s ease-out;background:#edf5f9}
.hero img{width:100%;height:150px;aspect-ratio:auto;object-fit:cover;object-position:50% 49%}
.enrollment{display:block;max-width:none;padding:20px 24px 0;margin:0}
.course-copy{position:static; margin:0 0 6px}
.course-copy h1{font-size:25px;line-height:1.4;letter-spacing:-.7px;margin:0}
.course-copy h1 span{font-size:15px;letter-spacing:0;margin-left:7px;font-weight:500}
.course-copy p{font-size:12px;margin:4px 0 0}
.form-area{border:0;margin:0;padding:0}
label{margin:15px 0 6px;font-size:13px}
.two-col{grid-template-columns:1.1fr 1fr;gap:12px}
input:not([type=checkbox]),select{height:48px;font-size:16px;background:#f7f8fa;border:1px solid #e6e9ed;border-radius:10px;padding:0 12px}
input::placeholder{font-size:14px;color:#85909a}
.code-row{gap:10px}.code-row .secondary{min-width:112px;padding:10px 12px;font-size:13px;background:#eff6fb;border:0}
#code-note{margin:6px 0 0;font-size:12px;color:#52697e}#code-note:empty{display:none}
summary{cursor:pointer;min-height:44px;display:flex;align-items:center;gap:7px;font-size:12px;color:var(--muted);list-style:none}
summary::-webkit-details-marker{display:none}summary::before{content:'+';font-size:17px;width:12px}details[open]>summary::before{content:'−'}
.optional-field{margin-top:4px}.optional-field summary span{color:#85909a;font-size:11px}.optional-field input{margin-bottom:6px}
.consent{margin:0;align-items:center;min-height:44px;font-size:11px;gap:8px;line-height:1.5}.consent input{width:20px;height:20px;margin:0}
.primary{min-height:50px;padding:13px 18px;border-radius:12px;font-size:16px;line-height:1.5}
.error{min-height:0;margin:8px 0;font-size:12px}.error:empty{display:none}.consent+.error:empty+.primary{margin-top:8px}
.privacy{border:0;margin:8px 24px 0;padding:0 0 14px}.privacy>summary{justify-content:center;font-size:11px}.privacy p{font-size:12px}
footer{display:none}
#parent-view[data-stage='2'] .hero,#parent-view[data-stage='3'] .hero{display:none}
#parent-view[data-stage='2'] .course-copy,#parent-view[data-stage='3'] .course-copy{display:none}
#checkout,#result{padding-top:10px;scroll-margin-top:20px}
#checkout h2,#result h2{font-size:23px;font-weight:600}
.back-button{border:0;background:none;color:var(--muted);font-size:13px;min-height:44px;padding:0;margin-bottom:12px}
.amount{font-size:42px;margin:18px 0 2px}.amount-note{font-size:12px;color:var(--muted);margin:0 0 20px}
.compact-data{margin:20px 0}.compact-data>div{padding:11px 0;font-size:14px;gap:15px}
.order-more{margin:12px 0}.order-more .order-data{margin:0 0 15px}.order-more .order-data>div{font-size:12px}
.actions{gap:10px}.notice{margin:16px 0;font-size:12px;padding:10px 12px}
.success-symbol{margin:24px auto 18px;width:60px;height:60px}#result>h2,#result>.result-note{text-align:center}.result-note{color:var(--muted);font-size:13px;margin:8px 0 24px}
.secondary{min-height:44px}.test-options{margin-top:12px}.test-options summary{justify-content:center;font-size:11px}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap;border:0}
:focus-visible{outline:3px solid #e99a19;outline-offset:3px}
body.admin-mode{background:var(--paper)}.topbar{height:60px}.admin-mode .demo-banner{font-size:11px}
@media(hover:hover){.primary:hover{transform:translateY(-1px)}}
@media(max-width:360px){.enrollment{padding:16px 18px 0}.hero img{height:120px}.course-copy h1{font-size:23px}.course-copy h1 span{font-size:14px}.privacy{margin-left:18px;margin-right:18px}.code-row .secondary{min-width:104px;padding:10px 8px}}
@media(prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important}}
@media(max-width:480px) and (max-height:740px){.hero img{height:110px}.enrollment{padding-top:16px}label{margin-top:12px}}
.icp{margin:0;padding:0 16px 16px;text-align:center;font-size:10px}.icp a{color:#78838c;text-decoration:none;display:inline-flex;align-items:center;min-height:32px}