:root{--black:#020100;--blue:#0B3289;--yellow:#F6CB1D;--text:#F6CB1D;--soft:#D8E2FF;--muted:#8DA4DF;--line:rgba(11,50,137,.75);--glass:rgba(11,50,137,.16)}
*{box-sizing:border-box}html{scroll-behavior:smooth}body{margin:0;background:var(--black);color:var(--text);font-family:-apple-system,BlinkMacSystemFont,"Segoe UI","PingFang SC","Microsoft YaHei",sans-serif}a{text-decoration:none;color:inherit}.bg{position:fixed;inset:0;pointer-events:none;background:radial-gradient(circle at 12% 8%,rgba(11,50,137,.28),transparent 28%),radial-gradient(circle at 88% 14%,rgba(246,203,29,.09),transparent 22%),radial-gradient(circle at 70% 88%,rgba(11,50,137,.20),transparent 34%);z-index:0}.app{position:relative;z-index:1}.top{position:sticky;top:0;z-index:10;background:rgba(2,1,0,.86);backdrop-filter:blur(18px);border-bottom:1px solid var(--line)}.nav{height:72px;max-width:1500px;margin:auto;padding:0 34px;display:flex;align-items:center;justify-content:space-between}.brand{display:flex;align-items:center;gap:14px;font-weight:1000}.logo{width:44px;height:44px;border-radius:15px;background:var(--blue);color:var(--yellow);display:grid;place-items:center;box-shadow:0 0 24px rgba(11,50,137,.7)}.navlinks{display:flex;gap:10px;flex-wrap:wrap}.navlinks a{border:1px solid var(--blue);border-radius:999px;color:var(--yellow);padding:9px 13px;font-size:13px}.navlinks a:hover,.navlinks a.on{background:var(--blue)}.wrap{max-width:1500px;margin:auto;padding:34px}.hero{display:grid;grid-template-columns:1.08fr .92fr;gap:26px;align-items:stretch}.hero-card,.panel,.card{border:2px solid var(--blue);background:rgba(2,1,0,.92);border-radius:42px;box-shadow:0 0 42px rgba(11,50,137,.20);overflow:hidden}.hero-card{padding:48px;min-height:420px;position:relative}.hero-card:after{content:"";position:absolute;right:-110px;bottom:-110px;width:320px;height:320px;border-radius:50%;border:2px solid var(--blue);box-shadow:0 0 42px rgba(11,50,137,.5)}.kicker{display:inline-flex;border:1px solid var(--blue);border-radius:14px;color:var(--yellow);padding:10px 15px;font-weight:900}.hero h1{font-size:66px;line-height:1.04;margin:26px 0;color:var(--yellow);letter-spacing:-2px}.hero p,.sub{color:var(--soft);line-height:1.85}.actions{display:flex;gap:14px;flex-wrap:wrap;margin-top:30px}.btn{border:0;border-radius:18px;padding:14px 19px;font-weight:1000;cursor:pointer;display:inline-flex;align-items:center;gap:8px}.btn.yellow{background:var(--yellow);color:var(--black)}.btn.blue{background:var(--blue);color:var(--yellow)}.btn.ghost{background:transparent;color:var(--yellow);border:1px solid var(--blue)}.mini{padding:24px}.mini-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:14px}.metric{background:var(--glass);border:1px solid var(--line);border-radius:24px;padding:20px}.metric b{font-size:34px}.section-title{display:flex;align-items:end;justify-content:space-between;gap:20px;margin:44px 0 18px}h2{margin:0;color:var(--yellow);font-size:36px;letter-spacing:-1px}h3{margin:0 0 10px;color:var(--yellow);font-size:24px}.badge{display:inline-flex;background:var(--yellow);color:var(--black);border-radius:999px;padding:7px 11px;font-size:12px;font-weight:1000}.grid-2{display:grid;grid-template-columns:1fr 1fr;gap:22px}.grid-3{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.grid-4{display:grid;grid-template-columns:repeat(4,1fr);gap:16px}.card{padding:24px}.screen-list{display:grid;grid-template-columns:repeat(5,1fr);gap:14px}.screen-link{min-height:126px;border:1px solid var(--blue);border-radius:26px;padding:18px;background:var(--glass);transition:.2s}.screen-link:hover{transform:translateY(-4px);background:var(--blue)}.screen-link b{display:block;margin-bottom:10px}.layout{display:grid;grid-template-columns:260px 1fr;gap:0;min-height:620px}.sidebar{background:var(--blue);padding:24px;border-radius:40px 60px 60px 40px}.sideitem{display:block;padding:14px 16px;margin-bottom:10px;border-radius:18px;color:var(--yellow);font-weight:900}.sideitem.on,.sideitem:hover{background:var(--yellow);color:var(--black)}.main{padding:24px}.toolbar{display:flex;justify-content:space-between;align-items:center;gap:16px;margin-bottom:18px}.input,.select{height:48px;border:2px solid var(--blue);border-radius:16px;padding:0 14px;color:var(--yellow);background:var(--black);display:flex;align-items:center}.table{border:1px solid var(--line);border-radius:24px;overflow:hidden}.tr{display:grid;grid-template-columns:1.2fr 1fr 1fr .8fr .9fr;gap:12px;padding:15px 18px;border-bottom:1px solid rgba(11,50,137,.45);color:var(--soft);font-size:14px}.tr.head{background:var(--glass);color:var(--yellow);font-weight:1000}.course-card{background:var(--glass);border:1px solid var(--line);border-radius:30px;padding:20px}.cover{height:150px;border-radius:30px;background:var(--blue);padding:20px;display:flex;flex-direction:column;justify-content:end;margin-bottom:16px}.progress{height:10px;border-radius:999px;background:rgba(246,203,29,.18);overflow:hidden}.progress i{display:block;height:100%;background:var(--yellow);border-radius:999px}.lesson{display:flex;justify-content:space-between;align-items:center;gap:12px;background:rgba(11,50,137,.20);border:1px solid var(--line);border-radius:20px;padding:14px 16px;margin-bottom:10px;color:var(--soft)}.lesson strong{color:var(--yellow)}.icon{width:32px;height:32px;border-radius:12px;background:var(--yellow);color:var(--black);display:inline-grid;place-items:center;margin-right:10px}.player{height:380px;border:2px solid var(--blue);border-radius:34px;background:#000;display:grid;place-items:center;position:relative;overflow:hidden}.watermark{position:absolute;inset:0;opacity:.16;background-image:repeating-linear-gradient(-30deg,transparent 0 70px,var(--yellow) 71px 72px,transparent 73px 140px)}.play{width:82px;height:82px;border-radius:50%;background:var(--yellow);color:var(--black);display:grid;place-items:center;font-size:32px;font-weight:1000}.pdf-page{height:460px;border:2px dashed var(--blue);border-radius:30px;background:rgba(255,255,255,.025);padding:34px;position:relative;overflow:hidden}.pdf-page:before{content:"账号 138****8899 · 学海无涯_7f8a";position:absolute;left:70px;top:200px;transform:rotate(-18deg);font-size:34px;color:var(--yellow);opacity:.15;font-weight:1000}.modal{max-width:560px;margin:40px auto;border:2px solid var(--blue);border-radius:36px;padding:32px;background:var(--black);box-shadow:0 0 50px rgba(11,50,137,.32)}.form{display:grid;gap:14px}.pill{border:1px solid var(--blue);border-radius:999px;padding:7px 10px;color:var(--yellow);font-size:12px}.outline-box{border:1px dashed var(--blue);border-radius:24px;padding:18px;color:var(--soft)}@media(max-width:1050px){.hero,.grid-2,.layout{grid-template-columns:1fr}.grid-3,.grid-4,.screen-list{grid-template-columns:1fr 1fr}.hero h1{font-size:42px}.navlinks{display:none}.wrap{padding:20px}.tr{grid-template-columns:1fr}.sidebar{border-radius:30px}}@media(max-width:620px){.grid-3,.grid-4,.screen-list{grid-template-columns:1fr}}
/* High fidelity admin console */
.admin-shell{min-height:100vh;display:grid;grid-template-columns:292px 1fr;background:var(--black)}.admin-sidebar{position:sticky;top:0;height:100vh;border-right:2px solid var(--blue);background:linear-gradient(180deg,rgba(11,50,137,.46),rgba(2,1,0,.98) 42%);padding:24px 18px;overflow:auto}.admin-logo{display:flex;gap:12px;align-items:center;margin-bottom:26px;padding:0 6px}.admin-logo-mark{width:48px;height:48px;border-radius:16px;background:var(--yellow);color:var(--black);display:grid;place-items:center;font-weight:1000}.admin-logo b{font-size:18px}.admin-group{margin:18px 0}.admin-group-title{color:var(--muted);font-size:12px;font-weight:900;padding:0 12px 8px;letter-spacing:.08em}.admin-menu a{display:flex;align-items:center;justify-content:space-between;gap:10px;padding:13px 14px;border-radius:18px;color:var(--soft);margin-bottom:7px;border:1px solid transparent;font-weight:800}.admin-menu a:hover,.admin-menu a.on{background:var(--yellow);color:var(--black)}.admin-menu small{opacity:.78}.admin-content{min-width:0}.admin-header{position:sticky;top:0;z-index:5;min-height:76px;background:rgba(2,1,0,.88);backdrop-filter:blur(18px);border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:14px 30px;gap:18px}.admin-title b{font-size:20px}.admin-search{width:360px;height:44px;border:1px solid var(--blue);border-radius:999px;display:flex;align-items:center;color:var(--muted);padding:0 16px;background:rgba(0,0,0,.35)}.admin-user{display:flex;align-items:center;gap:12px}.avatar{width:42px;height:42px;border-radius:50%;background:var(--blue);display:grid;place-items:center;color:var(--yellow);font-weight:1000}.admin-main{padding:28px 30px 60px}.module{padding-top:28px}.module-head{display:flex;align-items:center;justify-content:space-between;gap:18px;margin:10px 0 16px}.dash-hero{display:grid;grid-template-columns:1.1fr .9fr;gap:20px}.big-card{border:2px solid var(--blue);border-radius:34px;background:linear-gradient(135deg,rgba(11,50,137,.92),rgba(2,1,0,.95));padding:28px;min-height:230px;position:relative;overflow:hidden}.big-card:after{content:"";position:absolute;right:-80px;bottom:-90px;width:260px;height:260px;border-radius:50%;border:2px solid rgba(246,203,29,.25)}.stat-row{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-top:18px}.stat-tile{border:1px solid var(--line);background:rgba(2,1,0,.5);border-radius:24px;padding:18px}.stat-tile b{display:block;font-size:32px}.chart-card{border:2px solid var(--blue);border-radius:34px;padding:24px;background:rgba(2,1,0,.94)}.bars{height:150px;display:flex;gap:12px;align-items:end;margin-top:20px}.bar{flex:1;border-radius:12px 12px 4px 4px;background:linear-gradient(180deg,var(--yellow),#9b7d07);min-height:24px}.tabs{display:flex;gap:8px;flex-wrap:wrap}.tab{padding:9px 12px;border:1px solid var(--blue);border-radius:999px;color:var(--yellow);font-size:13px}.tab.on{background:var(--yellow);color:var(--black)}.data-table{border:1px solid var(--line);border-radius:26px;overflow:hidden;background:rgba(2,1,0,.72)}.data-table .row{display:grid;grid-template-columns:1.2fr 1fr 1fr .9fr 1fr;gap:12px;padding:15px 18px;border-bottom:1px solid rgba(11,50,137,.45);color:var(--soft);font-size:14px;align-items:center}.data-table .row.head{background:var(--glass);color:var(--yellow);font-weight:1000}.badge.blue{background:var(--blue);color:var(--yellow);border:1px solid rgba(246,203,29,.2)}.badge.green{background:rgba(70,209,125,.18);color:#8cffb6;border:1px solid rgba(70,209,125,.5)}.badge.red{background:rgba(255,92,92,.18);color:#ffadad;border:1px solid rgba(255,92,92,.5)}.btn.danger{background:rgba(255,92,92,.16);color:#ff9a9a;border:1px solid rgba(255,92,92,.6)}.split{display:grid;grid-template-columns:.9fr 1.1fr;gap:18px}.permission-grid{display:grid;grid-template-columns:260px 1fr;gap:18px}.level-list{display:grid;gap:12px}.level-item{border:1px solid var(--blue);border-radius:22px;padding:16px;background:rgba(11,50,137,.13)}.level-item.on{background:var(--blue)}.check-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:12px}.check-card{border:1px solid var(--line);border-radius:20px;padding:14px;background:rgba(11,50,137,.12);color:var(--soft)}.check-card b{color:var(--yellow)}.outline-editor{display:grid;grid-template-columns:1fr 360px;gap:18px}.chapter{border:1px solid var(--line);border-radius:26px;padding:18px;margin-bottom:14px;background:rgba(11,50,137,.10)}.chapter-title{display:flex;justify-content:space-between;align-items:center;margin-bottom:12px}.lesson-row{display:grid;grid-template-columns:42px 1fr 90px 90px;gap:10px;align-items:center;padding:12px;border:1px solid rgba(11,50,137,.55);border-radius:18px;margin-bottom:10px;color:var(--soft);background:rgba(2,1,0,.45)}.drag{width:32px;height:32px;border-radius:10px;background:var(--blue);display:grid;place-items:center;color:var(--yellow)}.textarea{min-height:110px;padding:14px;border:2px solid var(--blue);border-radius:16px;color:var(--yellow);background:var(--black)}.settings-grid{display:grid;grid-template-columns:repeat(2,1fr);gap:18px}.setting-card{border:1px solid var(--line);border-radius:26px;padding:20px;background:rgba(11,50,137,.10)}.switch{width:52px;height:28px;border-radius:999px;background:var(--blue);position:relative;box-shadow:inset 0 0 0 1px rgba(246,203,29,.25)}.switch:after{content:"";position:absolute;width:22px;height:22px;border-radius:50%;background:var(--yellow);right:3px;top:3px}.config-line{display:grid;grid-template-columns:160px 1fr;gap:12px;margin-bottom:12px;align-items:center}.device-card{display:flex;justify-content:space-between;align-items:center;border:1px solid var(--line);border-radius:20px;padding:15px;margin-bottom:10px;color:var(--soft);background:rgba(2,1,0,.42)}@media(max-width:1180px){.admin-shell{grid-template-columns:1fr}.admin-sidebar{position:relative;height:auto}.dash-hero,.split,.permission-grid,.outline-editor{grid-template-columns:1fr}.stat-row,.settings-grid{grid-template-columns:repeat(2,1fr)}.admin-search{display:none}}@media(max-width:760px){.stat-row,.check-grid,.settings-grid{grid-template-columns:1fr}.data-table .row,.lesson-row{grid-template-columns:1fr}.admin-header{align-items:flex-start;flex-direction:column}.module-head{align-items:flex-start;flex-direction:column}}
.pdf-page:before{content:"账号 138****8899 · 学海无涯_7f8a" !important}
/* High fidelity learner app */
.learner-shell{min-height:100vh;background:var(--black)}.learner-top{position:sticky;top:0;z-index:9;height:76px;background:rgba(2,1,0,.9);backdrop-filter:blur(18px);border-bottom:1px solid var(--line);display:flex;align-items:center;justify-content:space-between;padding:0 30px}.learner-brand{display:flex;align-items:center;gap:12px;font-weight:1000}.learner-main{max-width:1480px;margin:auto;padding:28px 30px 70px}.learner-hero{display:grid;grid-template-columns:1.1fr .9fr;gap:20px}.identity-card{border:2px solid var(--blue);border-radius:34px;background:linear-gradient(135deg,rgba(11,50,137,.88),rgba(2,1,0,.96));padding:28px;min-height:230px;position:relative;overflow:hidden}.identity-card:after{content:"";position:absolute;right:-70px;bottom:-80px;width:260px;height:260px;border:2px solid rgba(246,203,29,.22);border-radius:50%}.learner-stats{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}.mini-stat{border:1px solid var(--line);border-radius:24px;background:rgba(2,1,0,.55);padding:18px}.mini-stat b{font-size:30px}.course-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}.learn-course{border:1px solid var(--line);border-radius:32px;background:rgba(11,50,137,.12);padding:20px;cursor:pointer;transition:.2s}.learn-course:hover,.learn-course.active{transform:translateY(-4px);border-color:var(--yellow);box-shadow:0 0 28px rgba(246,203,29,.12)}.learn-cover{height:150px;border-radius:28px;background:linear-gradient(135deg,var(--blue),#071746);padding:20px;display:flex;flex-direction:column;justify-content:end;margin-bottom:16px}.locked{opacity:.55;filter:saturate(.6)}.learning-workspace{display:grid;grid-template-columns:350px 1fr;gap:18px}.lesson-panel,.viewer-panel{border:2px solid var(--blue);border-radius:34px;background:rgba(2,1,0,.94);padding:20px}.lesson-tabs{display:flex;gap:8px;margin-bottom:14px}.lesson-tabs button{border:1px solid var(--blue);background:transparent;color:var(--yellow);border-radius:999px;padding:9px 12px;font-weight:900}.lesson-tabs button.on{background:var(--yellow);color:var(--black)}.learn-lesson{display:grid;grid-template-columns:38px 1fr auto;gap:10px;align-items:center;border:1px solid rgba(11,50,137,.65);border-radius:20px;padding:12px;margin-bottom:10px;color:var(--soft);cursor:pointer;background:rgba(11,50,137,.12)}.learn-lesson:hover,.learn-lesson.active{border-color:var(--yellow);background:rgba(246,203,29,.08)}.learn-lesson.done .status{color:#8cffb6}.lesson-type{width:34px;height:34px;border-radius:12px;background:var(--yellow);color:var(--black);display:grid;place-items:center}.status{font-size:12px;color:var(--muted)}.viewer-head{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:16px}.video-box{height:430px;border:2px solid var(--blue);border-radius:32px;background:#000;display:grid;place-items:center;position:relative;overflow:hidden}.video-box:before{content:"账号 138****8899 · 学海无涯_7f8a";position:absolute;left:36px;top:24px;color:var(--yellow);opacity:.18;font-weight:1000}.video-control{position:absolute;left:24px;right:24px;bottom:22px}.control-row{display:flex;align-items:center;justify-content:space-between;margin-top:12px;color:var(--soft)}.round-play{width:78px;height:78px;border-radius:50%;background:var(--yellow);color:var(--black);display:grid;place-items:center;font-size:30px;font-weight:1000}.pdf-reader{height:430px;border:2px dashed var(--blue);border-radius:32px;background:rgba(255,255,255,.025);padding:30px;position:relative;overflow:hidden}.pdf-reader:before{content:"账号 138****8899 · 学海无涯_7f8a";position:absolute;left:80px;top:190px;transform:rotate(-18deg);font-size:34px;color:var(--yellow);opacity:.14;font-weight:1000}.pdf-page-card{height:100%;border-radius:22px;background:rgba(11,50,137,.16);padding:28px}.reader-actions{display:flex;justify-content:space-between;align-items:center;gap:12px;margin-top:16px}.profile-drawer{display:grid;grid-template-columns:1fr 1fr;gap:18px}.modal-mask{position:fixed;inset:0;background:rgba(0,0,0,.72);z-index:99;display:none;align-items:center;justify-content:center;padding:20px}.modal-mask.show{display:flex}.app-modal{width:min(560px,100%);border:2px solid var(--blue);border-radius:34px;background:var(--black);padding:28px;box-shadow:0 0 60px rgba(11,50,137,.42)}.toast{position:fixed;right:24px;bottom:24px;z-index:120;background:var(--yellow);color:var(--black);border-radius:18px;padding:14px 18px;font-weight:1000;display:none}.toast.show{display:block}.login-screen{min-height:calc(100vh - 76px);display:grid;grid-template-columns:1fr 1fr;gap:24px;align-items:center;max-width:1200px;margin:auto;padding:40px 24px}.login-visual{min-height:460px;border-radius:54px;background:var(--blue);padding:46px;display:flex;flex-direction:column;justify-content:center}.login-form-hi{border:2px solid var(--blue);border-radius:40px;padding:38px;background:rgba(2,1,0,.94)}@media(max-width:1050px){.learner-hero,.learning-workspace,.login-screen,.profile-drawer{grid-template-columns:1fr}.course-grid,.learner-stats{grid-template-columns:1fr}.learner-top{height:auto;padding:16px;align-items:flex-start;gap:14px;flex-direction:column}.video-box,.pdf-reader{height:340px}}

/* 会员级别授权：双栏穿梭框 */
.transfer-head{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;margin-bottom:18px}
.course-transfer{display:grid;grid-template-columns:minmax(0,1fr) 190px minmax(0,1fr);gap:16px;align-items:stretch}
.course-transfer.disabled{opacity:.55;pointer-events:none}
.transfer-panel{border:1px solid var(--line);border-radius:26px;background:rgba(11,50,137,.10);padding:16px;min-width:0;display:flex;flex-direction:column;min-height:540px}
.transfer-panel.authorized{border-color:rgba(246,203,29,.45);background:rgba(246,203,29,.055)}
.transfer-title{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px;color:var(--yellow)}
.transfer-search{height:44px;margin-bottom:12px;border-width:1px;background:rgba(2,1,0,.55)}
.transfer-search input{all:unset;width:100%;color:var(--yellow)}
.transfer-search input::placeholder{color:var(--muted)}
.transfer-list{display:grid;gap:10px;overflow:auto;max-height:430px;padding-right:4px}
.transfer-course{display:grid;grid-template-columns:22px 1fr;gap:10px;align-items:flex-start;border:1px solid rgba(11,50,137,.62);border-radius:18px;padding:12px;background:rgba(2,1,0,.36);color:var(--soft);cursor:pointer;transition:.16s}
.transfer-course:hover{border-color:var(--yellow);background:rgba(246,203,29,.06)}
.transfer-course input{margin-top:3px;accent-color:#f6cb1d}
.transfer-course b{display:block;color:var(--yellow);line-height:1.35;margin-bottom:4px}
.transfer-course small{display:block;color:var(--muted);line-height:1.55}
.transfer-actions{display:flex;flex-direction:column;justify-content:center;gap:12px;min-width:0}
.transfer-actions .btn{justify-content:center;width:100%;padding:12px 10px;border-radius:16px;text-align:center}
.empty-state{border:1px dashed rgba(11,50,137,.7);border-radius:18px;padding:22px;text-align:center;color:var(--muted);line-height:1.7;background:rgba(2,1,0,.25)}
@media(max-width:1180px){.course-transfer{grid-template-columns:1fr}.transfer-actions{display:grid;grid-template-columns:1fr 1fr}.transfer-panel{min-height:360px}.transfer-list{max-height:300px}}
@media(max-width:760px){.transfer-head{flex-direction:column}.transfer-actions{grid-template-columns:1fr}}

/* 会员级别列表页 */
.level-search{width:min(520px,100%)}
.level-search input{all:unset;width:100%;color:var(--yellow)}
.level-search input::placeholder{color:var(--muted)}
.level-table .level-row{grid-template-columns:1.1fr 1fr 1.4fr .55fr 1fr}
.level-table .row b{color:var(--yellow)}
.row-actions{display:flex;gap:8px;flex-wrap:wrap;align-items:center}
.row-actions .btn{padding:9px 12px;border-radius:14px}
.level-editor-mask{align-items:flex-start;overflow:auto}
.level-editor-modal{width:min(1180px,100%);margin:24px auto}
.editor-transfer .transfer-panel{min-height:480px}
.editor-transfer .transfer-list{max-height:370px}
@media(max-width:1000px){.level-table .level-row{grid-template-columns:1fr}.level-editor-modal{margin:0}.editor-transfer .transfer-panel{min-height:340px}}

/* 课程管理：列表 + 面包屑编辑视图 */
.breadcrumb{display:flex;align-items:center;gap:9px;margin:0 0 18px;color:var(--soft);font-weight:900}
.breadcrumb a{color:var(--yellow);cursor:pointer}.breadcrumb span{color:var(--muted)}.breadcrumb b{color:var(--yellow)}
.course-search{width:min(520px,100%)}.course-search input{all:unset;width:100%;color:var(--yellow)}.course-search input::placeholder{color:var(--muted)}
.course-list-table .course-row{grid-template-columns:1.35fr .75fr .65fr 1.1fr .9fr 1fr}.course-list-table .row b{color:var(--yellow)}
.course-form-grid{display:grid;grid-template-columns:1fr 1fr;gap:14px}.field{display:grid;gap:8px}.field label{color:var(--soft);font-weight:900}.field input,.field select,.field textarea{width:100%;border:1px solid var(--blue);border-radius:15px;background:#05070d;color:var(--yellow);padding:13px 14px;outline:none}.field textarea{min-height:92px;resize:vertical}.modal-wide{width:min(760px,100%)}
.course-edit-card,.course-content-card{border-radius:30px}.outline-tree{display:grid;gap:14px}.chapter-box{border:1px solid var(--line);border-radius:26px;background:rgba(11,50,137,.10);overflow:hidden}.chapter-head{display:flex;justify-content:space-between;align-items:center;gap:12px;padding:16px 18px;background:rgba(11,50,137,.22);border-bottom:1px solid rgba(11,50,137,.45)}.chapter-lessons{padding:14px;display:grid;gap:10px}.lesson-line{display:grid;grid-template-columns:42px 1fr auto;gap:12px;align-items:center;border:1px solid rgba(11,50,137,.55);border-radius:18px;background:rgba(2,1,0,.42);padding:12px}.lesson-icon{width:36px;height:36px;border-radius:13px;background:var(--yellow);color:var(--black);display:grid;place-items:center;font-weight:1000;font-size:12px}
@media(max-width:1000px){.course-list-table .course-row,.course-form-grid,.lesson-line{grid-template-columns:1fr}.chapter-head{align-items:flex-start;flex-direction:column}}

/* 课程内容：无限层级树形大纲 */
.tree-outline{display:grid;gap:10px}.tree-node{margin-left:calc(var(--depth) * 28px)}.tree-node-main{display:flex;justify-content:space-between;align-items:center;gap:12px;border:1px solid rgba(11,50,137,.55);border-radius:18px;background:rgba(2,1,0,.42);padding:12px}.chapter-node>.tree-node-main{background:rgba(11,50,137,.16);border-color:rgba(246,203,29,.28)}.tree-node-title{display:flex;align-items:center;gap:12px;min-width:0}.tree-node-title b{color:var(--yellow)}.tree-children{display:grid;gap:10px;margin-top:10px}.tree-node .row-actions .btn{padding:8px 10px;border-radius:12px}.chapter-node{position:relative}.chapter-node:before{content:"";position:absolute;left:-14px;top:0;bottom:0;border-left:1px dashed rgba(11,50,137,.65)}
@media(max-width:760px){.tree-node{margin-left:calc(var(--depth) * 12px)}.tree-node-main{align-items:flex-start;flex-direction:column}.chapter-node:before{display:none}}

.modal-mask{overflow:auto;align-items:flex-start!important}
.app-modal{max-height:calc(100vh - 40px);overflow:auto}
.modal-wide{max-height:calc(100vh - 40px);overflow:auto}

/* 学员端播放器/PDF 预览尺寸优化：避免视频和 PDF 被外层容器裁切 */
.learning-workspace{align-items:start}
.viewer-panel{overflow:visible}
.viewer-panel #videoView,
.viewer-panel #pdfView{width:100%}
.video-box,
.pdf-reader{width:100%;height:clamp(560px,72vh,820px)}
.pdf-reader{padding:0;border-style:solid;background:#202428}
.pdf-reader:before{display:none}
.pdf-page-card{height:100%;padding:0;background:#202428}
#studentPdfFrame{display:block;width:100%;height:100%}
#aliyunPlayer{width:100%;height:100%}
@media(max-width:1050px){.video-box,.pdf-reader{height:clamp(420px,64vh,680px)}}

/* 学员端详情页布局优化：限制各模块边界，避免内容抢占空间 */
.student-breadcrumb{margin-top:4px;margin-bottom:18px;max-width:100%;overflow:hidden;white-space:nowrap}
.student-breadcrumb a,.student-breadcrumb b{min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
#courseDetail .section-title{align-items:flex-start;margin-top:0}
#courseDetail .section-title>div{min-width:0;flex:1}
#courseTitle,#lessonTitle{overflow-wrap:anywhere}
#courseDesc,#lessonDescText,#lessonMeta{max-width:100%;overflow-wrap:anywhere}
#courseProgress{flex:0 0 auto;margin-top:8px}
.learning-workspace{grid-template-columns:minmax(280px,350px) minmax(0,1fr);gap:20px;align-items:start;width:100%}
.lesson-panel,.viewer-panel{min-width:0;max-width:100%;overflow:hidden}
.lesson-panel{position:sticky;top:96px;max-height:calc(100vh - 124px);display:flex;flex-direction:column}
.lesson-tabs{flex:0 0 auto}
#lessonList{min-height:0;overflow:auto;padding-right:4px}
.learn-lesson{grid-template-columns:38px minmax(0,1fr) auto;min-width:0}
.learn-lesson span{min-width:0}.learn-lesson b,.learn-lesson small{display:block;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}.learn-lesson .status{white-space:nowrap}
.viewer-head{align-items:flex-start;margin-bottom:18px;padding-bottom:16px;border-bottom:1px solid rgba(11,50,137,.45)}
.viewer-head>div{min-width:0;width:100%}
.viewer-panel #videoView,.viewer-panel #pdfView{min-width:0;overflow:hidden;border-radius:32px}
.video-box,.pdf-reader{max-width:100%;height:clamp(520px,68vh,760px)}
#aliyunPlayer,.video-box iframe,.pdf-reader iframe{max-width:100%}
@media(max-width:1050px){
  .learning-workspace{grid-template-columns:1fr}
  .lesson-panel{position:relative;top:auto;max-height:none}
  #lessonList{max-height:360px}
  #courseDetail .section-title{flex-direction:column;align-items:flex-start}
  .video-box,.pdf-reader{height:clamp(420px,62vh,640px)}
}
@media(max-width:640px){
  .learner-main{padding:20px 16px 56px}
  .lesson-panel,.viewer-panel{border-radius:24px;padding:16px}
  .learn-lesson{grid-template-columns:34px minmax(0,1fr);gap:9px}
  .learn-lesson .status{grid-column:2;justify-self:start}
  .video-box,.pdf-reader{border-radius:24px;height:clamp(340px,58vh,560px)}
}

/* 用户端顶部导航优化：避免底部分隔线穿过右侧按钮 */
.learner-top{min-height:96px;height:auto;padding:14px 38px;border-bottom:0;position:sticky}
.learner-top:after{content:"";position:absolute;left:0;right:0;bottom:0;height:1px;background:var(--line);pointer-events:none;z-index:0}
.learner-top .learner-brand,.learner-top .actions{position:relative;z-index:1}
.learner-top .actions{margin-top:0;align-items:center;gap:16px;flex-wrap:nowrap;background:rgba(2,1,0,.92);padding:0 0 0 18px}
.learner-top .btn{min-height:64px;padding:0 26px;border-radius:22px;line-height:1;white-space:nowrap}
.learner-top .btn.ghost{background:rgba(2,1,0,.96);border-color:rgba(11,50,137,.95)}
.learner-top .btn.blue{box-shadow:0 0 0 1px rgba(11,50,137,.8) inset}
@media(max-width:1050px){.learner-top{padding:16px;gap:16px}.learner-top .actions{padding-left:0;flex-wrap:wrap}.learner-top .btn{min-height:48px;padding:0 18px;border-radius:18px}}

/* 课程封面图：后台上传 + 用户端默认彩色封面 */
.course-cover-field{grid-column:1/-1}
.course-cover-editor{display:grid;grid-template-columns:260px minmax(0,1fr);gap:16px;align-items:stretch}
.course-cover-preview{min-height:148px;border:1px solid var(--line);border-radius:24px;background:linear-gradient(135deg,var(--blue),#071746);background-size:cover;background-position:center;display:grid;place-items:center;color:var(--soft);font-weight:900;overflow:hidden}
.course-cover-preview span{padding:10px 14px;border-radius:999px;background:rgba(2,1,0,.55);border:1px solid rgba(246,203,29,.18)}
.course-cover-tools{display:flex;flex-wrap:wrap;gap:12px;align-content:center;align-items:center;min-width:0}
.course-cover-tools .sub{flex-basis:100%;margin:0}
.learn-cover{position:relative;overflow:hidden;background-size:cover;background-position:center;isolation:isolate}
.learn-cover:after{content:"";position:absolute;inset:0;background:radial-gradient(circle at 82% 18%,rgba(246,203,29,.22),transparent 28%),linear-gradient(180deg,transparent,rgba(2,1,0,.22));z-index:-1}
.learn-cover.has-image:after{background:linear-gradient(180deg,rgba(2,1,0,.04),rgba(2,1,0,.62))}
.learn-cover h3{max-width:100%;overflow:hidden;text-overflow:ellipsis;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;text-shadow:0 2px 16px rgba(0,0,0,.55)}
.learn-cover.auto-cover h3{font-size:28px;line-height:1.15}
@media(max-width:760px){.course-cover-editor{grid-template-columns:1fr}.course-cover-preview{min-height:170px}.course-cover-tools .btn{width:100%;justify-content:center}}

/* 用户端课程卡片改版：参考“上封面、下简介”结构，无按钮 */
.course-grid{align-items:start}
.learn-course{padding:0;overflow:hidden;background:#f7f9ff;border:0;border-radius:28px;box-shadow:0 18px 42px rgba(11,50,137,.22);color:#17213a;display:flex;flex-direction:column}
.learn-course:hover,.learn-course.active{transform:translateY(-5px);box-shadow:0 22px 54px rgba(11,50,137,.34);border-color:transparent}
.learn-cover{height:auto;aspect-ratio:16/8.4;margin:12px 12px 0;border-radius:22px;display:flex;align-items:center;justify-content:center;padding:22px;background-size:cover;background-position:center}
.learn-cover:after{background:linear-gradient(180deg,rgba(255,255,255,.06),rgba(0,0,0,.16))}
.learn-cover.has-image:after{background:linear-gradient(180deg,rgba(0,0,0,.03),rgba(0,0,0,.18))}
.learn-cover h3{margin:0;max-width:78%;padding:14px 18px;border-radius:10px;background:rgba(255,255,255,.92);color:#17213a;text-align:center;font-size:28px;line-height:1.12;font-weight:1000;text-shadow:none;box-shadow:0 10px 24px rgba(11,50,137,.12)}
.learn-cover.has-image h3{display:none}
.learn-cover.auto-cover h3{font-size:28px;color:#17213a}
.learn-course-body{padding:18px 22px 22px;background:#f7f9ff;display:flex;flex-direction:column;gap:10px;min-height:170px}
.learn-course-body h3{margin:0;color:#1f2b46;font-size:22px;line-height:1.25;text-align:center;display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;overflow:hidden}
.course-summary{margin:0;color:#6d7485;font-size:15px;line-height:1.65;display:-webkit-box;-webkit-line-clamp:3;-webkit-box-orient:vertical;overflow:hidden;min-height:72px}
.course-card-meta{display:flex;justify-content:space-between;gap:12px;color:#36415c;font-weight:900;font-size:14px;margin-top:auto}
.learn-course .progress{height:10px;background:#e3e8f5;margin-top:0}.learn-course .progress i{background:linear-gradient(90deg,#2fb344,#f6cb1d)}
@media(max-width:760px){.learn-course-body{padding:16px 18px 20px}.learn-cover{margin:10px 10px 0;border-radius:20px}.learn-cover h3{font-size:22px}.learn-course-body h3{font-size:20px}}

/* 用户端课程卡片深色主题修正：与黑蓝黄背景统一 */
.learn-course{background:rgba(2,1,0,.94);border:1px solid rgba(11,50,137,.85);box-shadow:0 18px 44px rgba(11,50,137,.18);color:var(--soft)}
.learn-course:hover,.learn-course.active{border-color:var(--yellow);box-shadow:0 22px 56px rgba(11,50,137,.28),0 0 24px rgba(246,203,29,.10)}
.learn-course-body{background:linear-gradient(180deg,rgba(11,50,137,.10),rgba(2,1,0,.96));padding:20px 24px 24px;min-height:142px}
.learn-course-body h3{color:var(--yellow);text-align:left;font-size:24px}
.course-summary{color:var(--soft);min-height:0;-webkit-line-clamp:2}
.course-card-meta{color:var(--soft);font-size:15px}
.course-card-meta span:last-child{color:var(--yellow)}
.learn-course .progress{background:rgba(246,203,29,.16)}
.learn-course .progress i{background:var(--yellow)}
.learn-cover{box-shadow:inset 0 0 0 1px rgba(246,203,29,.08)}
.learn-cover h3{background:rgba(2,1,0,.78);color:var(--yellow);border:1px solid rgba(246,203,29,.22);box-shadow:0 12px 28px rgba(0,0,0,.28)}
.learn-cover.has-image:after{background:linear-gradient(180deg,rgba(2,1,0,.02),rgba(2,1,0,.44))}

/* 用户端课程浏览：Tab、搜索、分页、角色标识 */
.course-browser{margin:44px 0 18px}
.course-browser-head{display:flex;justify-content:space-between;align-items:center;gap:18px;flex-wrap:wrap}
.course-tabs{display:inline-flex;gap:8px;padding:6px;border:1px solid rgba(11,50,137,.85);border-radius:999px;background:rgba(11,50,137,.14)}
.course-tabs button{border:0;border-radius:999px;background:transparent;color:var(--yellow);font-weight:1000;padding:12px 20px;cursor:pointer}
.course-tabs button.on{background:var(--yellow);color:var(--black);box-shadow:0 8px 20px rgba(246,203,29,.18)}
.course-searchbar{display:flex;align-items:center;gap:10px;min-width:min(520px,100%)}
.course-searchbar .input{flex:1;min-width:220px;background:rgba(2,1,0,.72)}
.course-pager{display:flex;align-items:center;justify-content:center;gap:14px;margin:22px 0 0;color:var(--soft);font-weight:900;flex-wrap:wrap}
.course-pager .btn[disabled]{opacity:.45;pointer-events:none}
.course-role-tags{position:absolute;right:18px;top:18px;z-index:3;display:flex;gap:6px;flex-wrap:wrap;justify-content:flex-end;max-width:72%}
.course-role-tags span{display:inline-flex;align-items:center;max-width:120px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;border-radius:999px;padding:6px 10px;background:rgba(246,203,29,.94);color:var(--black);font-size:12px;font-weight:1000;box-shadow:0 8px 18px rgba(0,0,0,.22)}
.learn-course{position:relative}
.learn-course.locked-course{opacity:.82;filter:saturate(.82)}
.learn-course.locked-course:hover{opacity:1;filter:saturate(1)}
.learn-course.locked-course .learn-cover:before{content:"";position:absolute;inset:0;background:rgba(2,1,0,.18);z-index:1;pointer-events:none}
@media(max-width:760px){.course-browser-head{align-items:stretch}.course-tabs,.course-searchbar{width:100%}.course-tabs{justify-content:center}.course-tabs button{flex:1}.course-searchbar{flex-direction:column;align-items:stretch}.course-searchbar .input{min-width:0}.course-role-tags{right:14px;top:14px;max-width:78%}}

/* 未上传封面图的默认封面优化：提升文字清晰度和背景层次 */
.learn-cover.auto-cover{background-size:180% 180%;background-position:center;position:relative;overflow:hidden}
.learn-cover.auto-cover:before{content:"";position:absolute;inset:-30%;background:radial-gradient(circle at 18% 22%,rgba(246,203,29,.32),transparent 24%),radial-gradient(circle at 86% 18%,rgba(216,226,255,.18),transparent 26%),radial-gradient(circle at 68% 84%,rgba(11,50,137,.46),transparent 30%);z-index:0;pointer-events:none}
.learn-cover.auto-cover:after{background:linear-gradient(135deg,rgba(2,1,0,.10),rgba(2,1,0,.34));z-index:0}
.learn-cover.auto-cover h3{position:relative;z-index:1;max-width:88%;background:transparent;border:0;box-shadow:none;color:var(--yellow);font-size:36px;line-height:1.12;letter-spacing:.02em;text-shadow:0 3px 12px rgba(0,0,0,.72),0 0 22px rgba(246,203,29,.26);padding:0;text-align:center}
.learn-cover.auto-cover h3:before{content:"";position:absolute;left:50%;top:50%;width:calc(100% + 44px);height:calc(100% + 28px);transform:translate(-50%,-50%);border-radius:22px;background:rgba(2,1,0,.28);border:1px solid rgba(246,203,29,.16);z-index:-1;backdrop-filter:blur(2px)}
@media(max-width:760px){.learn-cover.auto-cover h3{font-size:28px}.learn-cover.auto-cover h3:before{width:calc(100% + 30px)}}

/* 学员端课程目录层级树 */
.student-tree-chapter{margin-left:calc(var(--depth) * 16px);margin-bottom:10px}
.student-tree-chapter-title{display:flex;align-items:center;gap:10px;padding:12px 14px;border:1px solid rgba(246,203,29,.22);border-radius:18px;background:rgba(246,203,29,.06);color:var(--yellow)}
.student-tree-chapter-title b{font-size:15px;line-height:1.35;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.student-tree-children{display:grid;gap:10px;margin-top:10px}
.student-tree-lesson{margin-left:calc(var(--depth) * 16px)}
.student-tree-lesson:before{content:"";position:absolute;left:calc(18px + var(--depth) * -2px);top:-10px;height:10px;border-left:1px dashed rgba(11,50,137,.7)}
.learn-lesson{position:relative}
@media(max-width:760px){.student-tree-chapter,.student-tree-lesson{margin-left:calc(var(--depth) * 8px)}.student-tree-chapter-title{padding:10px 12px}}

/* 学员端目录课时项紧凑化：与章节项高度一致 */
.learn-lesson.compact-lesson{min-height:58px;padding:10px 14px;grid-template-columns:34px minmax(0,1fr) auto;align-items:center}
.learn-lesson.compact-lesson .lesson-type{width:30px;height:30px;border-radius:10px;font-size:16px}
.learn-lesson.compact-lesson b{display:block;line-height:1.35;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.learn-lesson.compact-lesson .status{align-self:center;white-space:nowrap}
.student-tree-chapter-title{min-height:58px}
@media(max-width:640px){.learn-lesson.compact-lesson{grid-template-columns:32px minmax(0,1fr);min-height:54px}.learn-lesson.compact-lesson .status{grid-column:2;font-size:12px}}



/* 后台课程内容数字排序 */
.sort-control{display:inline-flex;align-items:center;gap:6px;color:var(--soft);font-size:12px;font-weight:900;border:1px solid rgba(11,50,137,.65);border-radius:14px;padding:7px 9px;background:rgba(2,1,0,.36)}
.sort-control input{width:58px;border:0;outline:none;background:transparent;color:var(--yellow);font-weight:1000;text-align:center}
.sort-control input::-webkit-outer-spin-button,.sort-control input::-webkit-inner-spin-button{opacity:1}