/* ============================================================
   知识付费站点 - 全局炫酷深色科技风
   覆盖：导航/页脚/Hero/课程卡/详情/表单/个人中心/后台/表格
   响应式：手机(480) / 平板(768) / 电脑(992)
   ============================================================ */
:root{
  --bg:#ffffff; --card:rgba(13,19,33,0.06);
  --line:rgba(13,19,33,0.10); --text:#1c2333; --dim:#4b5563;
  --violet:#6c5ce7; --cyan:#0284c7; --pink:#ff2e63; --amber:#ffc048;
  --grad:linear-gradient(135deg,#6c5ce7,#0284c7);
  --grad2:linear-gradient(135deg,#ff2e63,#ff9a3c);
  --r:16px; --glow:0 0 30px rgba(108,92,231,0.20);
  --navh:74px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  font-family:"PingFang SC","Microsoft YaHei","Helvetica Neue",Arial,sans-serif;
  background:var(--bg);color:var(--text);line-height:1.6;overflow-x:hidden;min-height:100vh;
}
/* 背景层 */
#bg{position:fixed;inset:0;z-index:-3;background:
  ,
  ,
  var(--bg)}
#grid{position:fixed;inset:0;z-index:-2;pointer-events:none;
  background-image:linear-gradient(rgba(15,23,42,.05) 1px,transparent 1px),
                   linear-gradient(90deg,rgba(15,23,42,.05) 1px,transparent 1px);
  background-size:56px 56px;
  -webkit-mask-image:radial-gradient(ellipse at center,#000 30%,transparent 78%);
  mask-image:radial-gradient(ellipse at center,#000 30%,transparent 78%)}
a{color:inherit;text-decoration:none}
img{max-width:100%;display:block}
button{font-family:inherit;cursor:pointer}
ul{list-style:none}
.container{width:min(1180px,92%);margin:0 auto}

/* ---------- 导航 ---------- */
.nav{position:sticky;top:0;z-index:100;height:var(--navh);
  background:#ffffff;box-shadow:0 1px 12px rgba(15,23,42,.08);backdrop-filter:blur(16px);-webkit-backdrop-filter:blur(16px);
  border-bottom:1px solid var(--line)}
.nav-in{height:100%;display:flex;align-items:center;justify-content:space-between}
.logo{display:flex;align-items:center;gap:10px;font-weight:800;font-size:1.2rem}
.logo i{width:38px;height:38px;border-radius:11px;background:var(--grad);
  display:grid;place-items:center;font-style:normal;color:#111827;box-shadow:var(--glow);
  animation:pulse 3s ease-in-out infinite}
@keyframes pulse{0%,100%{transform:scale(1)}50%{transform:scale(1.08)}}
.menu{display:flex;align-items:center;gap:4px}
.menu a{padding:8px 15px;border-radius:10px;color:var(--dim);font-size:.95rem;font-weight:500;transition:.25s}
.menu a:hover{color:#111827;background:rgba(13,19,33,0.06)}
.menu a.on{color:#111827;background:rgba(108,92,231,0.08)}
.nav-act{display:flex;align-items:center;gap:10px}
.burger{display:none;flex-direction:column;gap:5px;background:none;border:none;padding:8px}
.burger span{width:24px;height:2px;background:#fff;border-radius:2px;transition:.3s}


/* ===== 全站导航栏增强 ===== */
.nav{background:rgba(13,19,33,0.82);transition:background .3s,box-shadow .3s,border-color .3s}
.nav.scrolled{background:rgba(7,9,18,.94);box-shadow:0 6px 26px rgba(0,0,0,.5);border-bottom-color:rgba(255,160,0,0.11)}
.logo{position:relative;background:linear-gradient(90deg,#ffc300,#ff9100);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;color:#ffc300}
.logo img{box-shadow:0 0 14px rgba(255,160,0,0.25)}
.menu a{position:relative}
.menu a::after{content:"";position:absolute;left:50%;bottom:2px;width:0;height:2px;background:linear-gradient(90deg,#ffc300,#ff9100);border-radius:2px;transition:width .25s,left .25s,opacity .25s;opacity:0}
.menu a:hover::after,.menu a.on::after{width:60%;left:20%;opacity:1}
.menu a:hover{color:#ffc300;background:rgba(255,160,0,0.04);text-shadow:0 0 12px rgba(255,160,0,0.17)}
.menu a.on{color:#ffc300;background:rgba(255,160,0,0.08);text-shadow:0 0 12px rgba(255,160,0,0.19)}
.burger span{box-shadow:0 0 6px rgba(255,160,0,0.28)}
.burger.open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.burger.open span:nth-child(2){opacity:0}
.burger.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}
/* ---------- 按钮 ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;padding:11px 22px;
  border:none;border-radius:12px;font-weight:600;transition:.25s;white-space:nowrap;font-size:.95rem}
.btn-p{background:var(--grad);color:#111827;box-shadow:var(--glow)}
.btn-p:hover{transform:translateY(-2px);box-shadow:0 0 38px rgba(108,92,231,0.28)}
.btn-g{background:transparent;color:var(--text);border:1px solid var(--line)}
.btn-g:hover{border-color:var(--violet);color:#111827}
.btn-a{background:var(--grad2);color:#111827}
.btn-a:hover{transform:translateY(-2px);box-shadow:0 0 34px rgba(255,46,99,.45)}
.btn-lg{padding:15px 30px;font-size:1.05rem}
.btn-block{width:100%}

/* ---------- 通用区块 ---------- */
.sec{padding:70px 0}
.sec-head{text-align:center;margin-bottom:40px}
.sec-head .st{display:inline-block;padding:6px 16px;border-radius:30px;background:rgba(108,92,231,0.07);
  border:1px solid rgba(108,92,231,0.20);color:#7c3aed;font-size:.84rem;margin-bottom:14px}
.sec-head h2{font-size:clamp(1.6rem,4vw,2.4rem);font-weight:800}
.sec-head h2 em{font-style:normal;background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.sec-head p{color:var(--dim);margin-top:8px}

/* 子页头部横幅 */
.page-hero{padding:64px 0 40px;text-align:center;position:relative}
.page-hero h1{font-size:clamp(1.9rem,4.5vw,3rem);font-weight:900}
.page-hero h1 em{font-style:normal;background:linear-gradient(90deg,#fff,#b9b3ff,#0284c7);background-size:300% 100%;
  -webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent;animation:shine 6s linear infinite}
@keyframes shine{to{background-position:300% 0}}
.page-hero p{color:var(--dim);margin-top:10px}

/* ---------- 课程卡 ---------- */
.grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(270px,1fr));gap:24px}
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--r);overflow:hidden;
  transition:transform .3s,box-shadow .3s,border-color .3s;display:flex;flex-direction:column;position:relative}
.card:hover{transform:translateY(-9px);border-color:var(--violet);box-shadow:0 24px 60px rgba(0,0,0,.5),var(--glow)}
.cover{position:relative;aspect-ratio:16/9;overflow:hidden}
.cover img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.card:hover .cover img{transform:scale(1.08)}
.badge{position:absolute;top:12px;left:12px;padding:4px 11px;border-radius:20px;font-size:.74rem;font-weight:700}
.b-hot{background:var(--grad2);color:#111827}
.b-free{background:#2ecc71;color:#063}
.b-level{top:12px;left:auto;right:12px;background:rgba(10,14,26,.72);backdrop-filter:blur(6px);color:#111827;border:1px solid var(--line)}
.c-body{padding:18px;display:flex;flex-direction:column;gap:9px;flex:1}
.c-body h3{font-size:1.04rem;font-weight:700;line-height:1.35}
.c-meta{display:flex;justify-content:space-between;color:var(--dim);font-size:.82rem}
.c-foot{margin-top:auto;display:flex;align-items:center;justify-content:space-between;padding-top:12px;border-top:1px dashed var(--line)}
.price{font-weight:800;font-size:1.18rem;color:var(--cyan)}
.price del{font-size:.8rem;color:var(--dim);font-weight:400;margin-left:6px}
.price .free{color:#2ecc71}
.go{color:var(--violet);font-weight:600;font-size:.9rem;transition:.2s}
.card:hover .go{color:var(--cyan);letter-spacing:.5px}

/* ---------- 表单(登录/注册) ---------- */
.auth-wrap{min-height:calc(100vh - var(--navh));display:grid;place-items:center;padding:50px 0}
.auth-card{width:min(440px,92%);background:rgba(13,19,33,0.06);
  border:1px solid var(--line);border-radius:22px;padding:40px 36px;
  backdrop-filter:blur(14px);-webkit-backdrop-filter:blur(14px);
  box-shadow:0 30px 80px rgba(0,0,0,.5);position:relative;overflow:hidden}
.auth-card::before{content:"";position:absolute;top:-60px;right:-60px;width:180px;height:180px;border-radius:50%;
  background:var(--grad);filter:blur(70px);opacity:.35}
.auth-card h2{text-align:center;font-size:1.6rem;margin-bottom:6px;position:relative}
.auth-card .sub{text-align:center;color:var(--dim);font-size:.92rem;margin-bottom:26px;position:relative}
.form-group{margin-bottom:18px;position:relative}
.form-group label{display:block;font-size:.9rem;color:var(--dim);margin-bottom:8px}
.input{width:100%;padding:13px 16px;background:#ffffff;color:#111827;
  border:1px solid var(--line);border-radius:12px;outline:none;transition:border-color .25s,box-shadow .25s}
.input:focus{border-color:var(--violet);box-shadow:0 0 0 3px rgba(108,92,231,0.10)}
.input option{background:#0b1020}
.auth-foot{text-align:center;margin-top:18px;color:var(--dim);font-size:.9rem;position:relative}
.auth-foot a{color:#7c3aed;font-weight:600}
.auth-foot a:hover{color:var(--cyan)}
.alert{padding:12px 16px;border-radius:12px;font-size:.9rem;margin-bottom:18px;border:1px solid transparent;position:relative}
.alert-error{background:rgba(255,77,109,.12);border-color:rgba(255,77,109,.4);color:var(--pink)}
.alert-success{background:rgba(46,204,113,.12);border-color:rgba(46,204,113,.4);color:#2ecc71}
.alert-info{background:rgba(2,132,199,0.06);border-color:rgba(2,132,199,0.19);color:var(--cyan)}
.alert a{color:var(--cyan)}

/* 筛选表单 */
.filter{max-width:820px;margin:0 auto 30px;display:flex;gap:12px;flex-wrap:wrap;justify-content:center}
.filter .input{flex:1;min-width:180px}
.filter .input.sm{flex:0 0 150px;min-width:150px}

/* ---------- 课程详情 ---------- */
.detail{padding:44px 0 60px}
.detail-grid{display:grid;grid-template-columns:1.6fr 1fr;gap:36px;align-items:start}
.d-video{aspect-ratio:16/9;border-radius:var(--r);overflow:hidden;background:#000;
  border:1px solid var(--line);display:grid;place-items:center;position:relative;margin-bottom:22px}
.d-video .play{width:76px;height:76px;border-radius:50%;background:var(--grad);display:grid;place-items:center;
  font-size:1.7rem;cursor:pointer;box-shadow:var(--glow);transition:transform .25s}
.d-video .play:hover{transform:scale(1.1)}
.d-info h1{font-size:clamp(1.5rem,3.5vw,2.2rem);margin-bottom:12px}
.d-sub{color:var(--dim);margin-bottom:16px}
.d-meta{display:flex;gap:18px;flex-wrap:wrap;color:var(--dim);font-size:.92rem;margin-bottom:20px}
.d-meta span i{font-style:normal;color:#7c3aed;margin-right:5px}
.d-intro{color:var(--dim);margin-bottom:24px;max-width:760px}
.buy-box{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:26px;
  position:sticky;top:90px;backdrop-filter:blur(10px)}
.buy-box .db-price{font-size:2.1rem;font-weight:900;color:var(--cyan);margin-bottom:16px}
.buy-box .db-price .free{color:#2ecc71}
.buy-box .db-price del{font-size:1rem;color:var(--dim);font-weight:400;margin-left:8px}
.buy-perks{margin-top:18px;display:grid;gap:10px;color:var(--dim);font-size:.88rem}
.lessons{margin-top:34px}
.lessons h3{font-size:1.2rem;margin-bottom:16px}
.lesson{display:flex;align-items:center;gap:14px;padding:14px 18px;background:var(--card);
  border:1px solid var(--line);border-radius:12px;margin-bottom:10px;transition:.2s}
.lesson:hover{border-color:var(--violet)}
.lesson .li-ico{color:#7c3aed}
.lesson.free .li-ico{color:#2ecc71}
.lesson span:nth-child(2){flex:1}
.lesson .li-time{color:var(--dim);font-size:.85rem}
.li-tag{font-size:.75rem;padding:3px 12px;border-radius:12px;font-weight:600}
.li-tag.free{background:rgba(46,204,113,.15);color:#2ecc71}
.li-tag.lock{background:rgba(13,19,33,0.06);color:var(--dim)}

/* ---------- 套餐 ---------- */
.plans{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:24px;align-items:stretch}
.plan{background:var(--card);border:1px solid var(--line);border-radius:20px;padding:34px 26px;text-align:center;position:relative;transition:.3s}
.plan:hover{transform:translateY(-8px);box-shadow:0 24px 60px rgba(0,0,0,.5)}
.plan.hot{background:linear-gradient(165deg,rgba(108,92,231,0.10),rgba(2,132,199,0.04));border-color:var(--violet);box-shadow:var(--glow);transform:scale(1.03)}
.plan.hot:hover{transform:scale(1.03) translateY(-8px)}
.pop{position:absolute;top:-13px;left:50%;transform:translateX(-50%);background:var(--grad2);color:#111827;padding:4px 16px;border-radius:20px;font-size:.76rem;font-weight:700}
.plan h3{font-size:1.2rem;margin-bottom:6px}
.pprice{font-size:2.4rem;font-weight:900;color:var(--cyan);margin:14px 0}
.pprice small{font-size:1rem;color:var(--dim);font-weight:400}
.plan ul{text-align:left;color:var(--dim);font-size:.9rem;margin:20px 0 24px;display:grid;gap:10px}
.plan ul li::before{content:"✓";color:#2ecc71;margin-right:8px;font-weight:700}
.faqs{max-width:760px;margin:0 auto;display:grid;gap:14px}
.faq{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:20px;transition:.2s}
.faq:hover{border-color:var(--cyan)}
.faq h4{margin-bottom:6px}.faq p{color:var(--dim);font-size:.92rem}

/* ---------- 个人中心 ---------- */
.dash{display:grid;grid-template-columns:300px 1fr;gap:26px;align-items:start}
.profile{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:28px;text-align:center;backdrop-filter:blur(10px)}
.avatar{width:92px;height:92px;border-radius:50%;margin:0 auto 16px;background:var(--grad);
  display:grid;place-items:center;font-size:2.3rem;color:#111827;box-shadow:var(--glow);animation:pulse 4s infinite}
.vip-tag{display:inline-block;padding:4px 16px;border-radius:20px;font-size:.8rem;margin-top:12px;background:rgba(255,201,4,.14);color:var(--amber);border:1px solid rgba(255,201,4,.35)}
.profile .pline{display:flex;justify-content:space-around;margin-top:20px;padding-top:18px;border-top:1px dashed var(--line)}
.pline b{display:block;color:var(--cyan);font-size:1.2rem}.pline span{color:var(--dim);font-size:.8rem}
.panel{background:var(--card);border:1px solid var(--line);border-radius:var(--r);padding:26px;backdrop-filter:blur(10px)}
.panel h3{margin-bottom:18px;font-size:1.15rem}
.mini-course{display:flex;gap:16px;align-items:center;padding:14px;border:1px solid var(--line);border-radius:12px;margin-bottom:12px;transition:.2s}
.mini-course:hover{border-color:var(--violet)}
.mini-course img{width:98px;height:64px;object-fit:cover;border-radius:8px}
.mini-course .mi{flex:1}.mini-course .mi h4{font-size:.98rem}.mini-course .mi p{color:var(--dim);font-size:.8rem}

/* ---------- 后台 ---------- */
.admin-login{min-height:100vh;display:grid;place-items:center;position:relative;overflow:hidden}
.admin-login::before{content:"";position:absolute;inset:0;
  background:,
  }
.admin-shell{display:flex;min-height:100vh}
.admin-side{width:240px;background:rgba(13,19,33,0.98);border-right:1px solid var(--line);padding:24px 18px;display:flex;flex-direction:column;gap:8px;position:sticky;top:0;height:100vh}
.admin-side .side-brand{font-weight:800;margin-bottom:22px;display:flex;gap:10px;align-items:center}
.admin-side a{padding:11px 14px;border-radius:10px;color:var(--dim);display:flex;gap:10px;align-items:center;transition:.2s}
.admin-side a:hover,.admin-side a.active{background:rgba(108,92,231,0.08);color:#111827}
.admin-main{flex:1;padding:30px;min-width:0}
.admin-top{display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:10px;margin-bottom:26px}
.stat-cards{display:grid;grid-template-columns:repeat(auto-fit,minmax(190px,1fr));gap:20px;margin-bottom:30px}
.stat-card{background:var(--card);border:1px solid var(--line);border-radius:14px;padding:22px;transition:.2s;backdrop-filter:blur(8px)}
.stat-card:hover{border-color:var(--cyan);transform:translateY(-3px)}
.stat-card .sc-ico{font-size:1.5rem;margin-bottom:10px}
.stat-card b{font-size:1.6rem;display:block;background:var(--grad);-webkit-background-clip:text;background-clip:text;-webkit-text-fill-color:transparent}
.stat-card span{color:var(--dim);font-size:.85rem}
.table-wrap{overflow-x:auto;background:var(--card);border:1px solid var(--line);border-radius:14px;backdrop-filter:blur(8px)}
table.data{width:100%;border-collapse:collapse;font-size:.92rem}
table.data th,table.data td{padding:14px 18px;text-align:left;border-bottom:1px solid var(--line);white-space:nowrap}
table.data th{color:var(--dim);font-size:.8rem;text-transform:uppercase;background:rgba(13,19,33,0.06)}
table.data tr:hover td{background:rgba(13,19,33,0.06)}
.h3{margin:28px 0 16px;font-size:1.2rem}

/* ---------- 页脚 ---------- */
.footer{border-top:1px solid var(--line);padding:40px 0 26px;margin-top:60px;background:rgba(13,19,33,.03)}
.f-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:30px}
.footer h4{margin-bottom:14px;font-size:1rem}
.footer a,.footer p{color:var(--dim);font-size:.9rem;display:block;margin-bottom:8px}
.footer a:hover{color:var(--cyan)}
.f-bottom{text-align:center;color:var(--dim);font-size:.8rem;margin-top:28px;padding-top:18px;border-top:1px solid var(--line)}

/* 动画显现（2026-10-16 修复：内容默认可见，不再依赖 JS 观察器显示，杜绝主体空白） */
.rv{opacity:1;transform:none;transition:none}
.rv.on{opacity:1;transform:none}

::-webkit-scrollbar{width:10px;height:10px}
::-webkit-scrollbar-thumb{background:rgba(108,92,231,0.28);border-radius:6px}
::-webkit-scrollbar-track{background:transparent}

/* ---------- 响应式 ---------- */
@media(max-width:992px){
  .detail-grid{grid-template-columns:1fr}
  .dash{grid-template-columns:1fr}
  .f-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:768px){
  .menu{position:fixed;top:0;right:0;bottom:0;left:auto;width:76%;max-width:320px;flex-direction:column;align-items:stretch;
    background:rgba(8,10,20,.98);padding:calc(var(--navh) + 10px) 18px 18px;gap:4px;border-left:1px solid var(--line);
    transform:translateX(110%);transition:.3s;overflow-y:auto;z-index:9998;box-shadow:-14px 0 34px rgba(0,0,0,.5)}
  .menu.open{transform:translateX(0)}
  .menu a{text-align:left;padding:13px 12px;border-radius:10px}
  .menu a:hover{background:rgba(108,92,231,0.09)}
  .burger{display:flex}
  .nav-act .btn-g{display:none}
  .sec{padding:52px 0}
  .f-grid{grid-template-columns:1fr}
  .admin-side{width:70px;padding:24px 10px}
  .admin-side a span:last-child{display:none}
  .admin-side .side-brand b{display:none}
  .buy-box{position:static}
}
@media(max-width:480px){
  .plan.hot{transform:none}.plan.hot:hover{transform:translateY(-8px)}
  .page-hero{padding:48px 0 30px}
  /* ---- 移动端按钮显示优化：避免按钮过长/过宽被截断 ---- */
  .btn{padding:9px 14px;font-size:.88rem;border-radius:10px}
  .btn-lg{padding:12px 20px;font-size:.98rem}
  .btn-block{padding:11px 14px}
  .btn-ops,.ops{display:flex;flex-wrap:wrap;gap:6px;align-items:center}
  .btn-ops .btn,.btn-ops form,.btn-ops a,.ops .btn,.ops form,.ops a{flex:1 1 auto;min-width:64px;text-align:center;margin:0}
  .tbl{font-size:.85rem}
  .tbl table th,.tbl table td{padding:8px 8px}
  .pill{font-size:.72rem}
}

/* ===== 首屏卡片骨架屏（页面未就绪时卡片显示脉冲占位，就绪后淡入内容） ===== */
html:not(.loaded) .grid .card, html:not(.loaded) .plan, html:not(.loaded) .cp{
  background:linear-gradient(90deg,#171c39 25%,#1e2544 37%,#171c39 63%);
  background-size:400% 100%;animation:skel 1.2s ease-in-out infinite;border:none;overflow:hidden;
}
@keyframes skel{0%{background-position:100% 50%}100%{background-position:0 50%}}
html:not(.loaded) .grid .card *{opacity:0}
html.loaded .grid .card,html.loaded .plan,html.loaded .cp{transition:opacity .5s,transform .3s}
html.loaded .grid .card *{opacity:1;transition:opacity .45s}
@media (prefers-reduced-motion:reduce){html:not(.loaded) .grid .card,html:not(.loaded) .plan,html:not(.loaded) .cp{animation:none}}

/* ===== 详情页骨架屏 + 品牌水印占位 ===== */
html:not(.loaded) .detail .d-video, html:not(.loaded) .detail .d-info, html:not(.loaded) .detail .d-sub, html:not(.loaded) .detail .d-intro, html:not(.loaded) .detail .resume{
  background:linear-gradient(90deg,#171c39 25%,#1e2544 37%,#171c39 63%);
  background-size:400% 100%;animation:skel 1.2s ease-in-out infinite;border-radius:16px;border:none;overflow:hidden;
}
html:not(.loaded) .detail .d-video *, html:not(.loaded) .detail .d-info *, html:not(.loaded) .detail .d-sub *, html:not(.loaded) .detail .d-intro *, html:not(.loaded) .detail .resume *{opacity:0}
html.loaded .detail .d-video, html.loaded .detail .d-info, html.loaded .detail .d-sub, html.loaded .detail .d-intro, html.loaded .detail .resume{transition:opacity .5s}
html.loaded .detail .d-video *, html.loaded .detail .d-info *, html.loaded .detail .d-sub *, html.loaded .detail .d-intro *, html.loaded .detail .resume *{opacity:1;transition:opacity .45s}
html:not(.loaded) .grid .card{position:relative}
html:not(.loaded) .grid .card::after{content:"✦\A 外卖运营学院 · 精选好课";white-space:pre;text-align:center;line-height:2.1;font-size:1.35rem;color:rgba(2,132,199,0.11);text-shadow:0 0 12px rgba(2,132,199,0.14)}


/* ==== 全站炫酷增强 · 黄色系光效 ==== */
html{scroll-behavior:smooth}
body{background:
 ,
 ,
 ,
 #ffffff !important;
 background-attachment:fixed;
 background-size:170% 170%,170% 170%,170% 170%,260px 260px,340px 340px,300px 300px,auto;
 animation:cbgShift 26s ease-in-out infinite}
@keyframes cbgShift{0%{background-position:0 0,0 0,0 0,0 0,0 0,0 0}50%{background-position:55% 40%,70% 30%,42% 60%,260px 260px,340px 340px,300px 300px}100%{background-position:0 0,0 0,0 0,0 0,0 0,0 0,0 0}}
h1,h2{background:linear-gradient(120deg,#ffd700,#ff8c00,#ffd700);-webkit-background-clip:text;background-clip:text;color:transparent}
.btn,button[type=submit],.btn-p,.btn-g,.btn-o,.btn-b{transition:transform .18s,box-shadow .22s}
.btn:hover,button[type=submit]:hover,.btn-p:hover,.btn-g:hover{transform:translateY(-2px);box-shadow:0 8px 26px rgba(255,160,0,0.19)}
.card,.panel,.plan,.stat,.course-card,.goods,.hc-slide,.pcard,.gcard{transition:transform .2s,box-shadow .25s,border-color .2s}
.card:hover,.panel:hover,.plan:hover,.stat:hover,.course-card:hover,.goods:hover,.hc-slide:hover,.pcard:hover,.gcard:hover{transform:translateY(-3px);box-shadow:0 10px 30px rgba(0,0,0,.35),0 0 24px rgba(255,160,0,0.08);border-color:rgba(255,160,0,0.22)}
input,.input,select,textarea{transition:border-color .2s,box-shadow .2s}
input:focus,.input:focus,select:focus,textarea:focus{border-color:#ffc300;box-shadow:0 0 0 3px rgba(255,160,0,0.09),0 0 20px rgba(255,160,0,0.15)}

/* ---------- 移动端通用适配（表格滚动 / 后台内容区 / 弹窗宽度） ---------- */
.tbl,.table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch;max-width:100%}
@media(max-width:768px){
  .admin-main{padding:16px 12px}
  .modal,.mbox,#ucMsgBox{max-width:calc(100vw - 32px)}
  .detail-grid .info-side{padding-top:4px}
}
@media(max-width:480px){
  .tbl{font-size:.8rem}
  .tbl table th,.tbl table td{padding:6px 6px}
  .modal{padding:18px}
}

/* ---------- 促销横幅对比度修复：深橙背景 + 白色文字（全站覆盖页面内联旧样式） ---------- */
.promo-bar{background:linear-gradient(120deg,#e6452e,#ff8a1e,#e6452e)!important;border-color:rgba(255,255,255,.28)!important;color:#ffffff!important;box-shadow:0 6px 26px rgba(230,69,46,.30)!important}
.promo-bar .pb-tag{color:#fff8e6!important;text-shadow:0 1px 2px rgba(0,0,0,.18);-webkit-text-fill-color:#fff8e6}
.promo-bar em{background:linear-gradient(90deg,#ffffff,#ffe08a,#ffffff)!important;-webkit-background-clip:text!important;background-clip:text!important;-webkit-text-fill-color:transparent!important}
.promo-bar span{color:#fff4e0!important}

/* ============================================================
   全站自适应：手机 / 平板 / 笔记本 / PC
   ============================================================ */

/* 平板横屏 768-1024 */
@media(min-width:768px) and (max-width:1024px){
  .container,.wrap{max-width:960px}
  .grid-3,.grid-4{grid-template-columns:repeat(2,1fr)!important}
  .detail-grid{grid-template-columns:1fr 280px!important}
}

/* 手机竖屏 <768px */
@media(max-width:768px){
  .container,.wrap{padding-left:12px!important;padding-right:12px!important;width:100%!important}
  .grid-2,.grid-3,.grid-4,.grid-5{grid-template-columns:1fr!important}
  .detail-grid{grid-template-columns:1fr!important}
  .detail-grid .info-side{padding-left:0!important;padding-top:16px}
  .admin-main{padding:12px!important}
  .auth-card,.login-card,.register-card{margin:0 8px!important;padding:20px 14px!important;max-width:100%!important}
  .tbl,.table-wrap{overflow-x:auto}
  .topbar,.navbar,.header-nav{flex-wrap:wrap;height:auto!important;padding:8px 12px!important}
  .nav-links{display:none!important}
  .hero h1,.page-title{font-size:1.4rem!important}
  .btn,.btn-p,.btn-lg{height:44px!important;font-size:.95rem!important}
  input,.input{height:44px!important;font-size:.95rem!important}
  .stat{padding:12px!important}
  .card,.panel,.course-card,.goods{padding:12px!important}
  .sidebar,.side-nav{display:none!important}
  .modal,.mbox{max-width:calc(100vw - 24px)!important;padding:16px!important}
  .footer{padding:16px 12px!important;font-size:.8rem}
  .order-summary,.checkout-summary{width:100%!important;position:static!important}
  table{font-size:.8rem}
  th,td{padding:6px 4px!important}
}

/* 小手机 <480px */
@media(max-width:480px){
  .hero h1{font-size:1.2rem!important}
  .auth-card h2{font-size:1.2rem!important}
  .btn{padding:0 12px!important;font-size:.88rem!important}
  .m-container{padding:12px!important}
}

/* PC大屏 >1440px */
@media(min-width:1440px){
  .container,.wrap{max-width:1320px}
}
.promo-bar::before{background:linear-gradient(120deg,transparent,rgba(255,255,255,.25),transparent)!important}